Mercurial > hg > toybox
annotate toys/pending/dhcp.c @ 1005:03f72b57a092
DHCP client and server, from Ashwini Sharma.
author | Rob Landley <rob@landley.net> |
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date | Wed, 14 Aug 2013 19:09:33 -0500 |
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children | d3f9e55e350a |
rev | line source |
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1005
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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1 /* dhcp.c - DHCP client for dynamic network configuration. |
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DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
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2 * |
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3 * Copyright 2012 Madhur Verma <mad.flexi@gmail.com> |
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4 * Copyright 2013 Kyungwan Han <asura321@gmail.com> |
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5 * |
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6 * Not in SUSv4. |
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7 USE_DHCP(NEWTOY(dhcp, "V:H:F:x*r:O*A#<0T#<0t#<0s:p:i:SBRCaovqnbf", TOYFLAG_SBIN|TOYFLAG_ROOTONLY)) |
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8 |
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9 config DHCP |
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10 bool "dhcp" |
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11 default n |
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12 help |
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13 usage: dhcp [-fbnqvoCRB] [-i IFACE] [-r IP] [-s PROG] [-p PIDFILE] |
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14 [-H HOSTNAME] [-V VENDOR] [-x OPT:VAL] [-O OPT] |
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15 |
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16 Configure network dynamicaly using DHCP. |
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17 |
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18 -i Interface to use (default eth0) |
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19 -p Create pidfile |
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20 -s Run PROG at DHCP events (default /usr/share/dhcp/default.script) |
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21 -B Request broadcast replies |
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22 -t Send up to N discover packets |
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23 -T Pause between packets (default 3 seconds) |
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24 -A Wait N seconds after failure (default 20) |
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25 -f Run in foreground |
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26 -b Background if lease is not obtained |
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27 -n Exit if lease is not obtained |
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28 -q Exit after obtaining lease |
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29 -R Release IP on exit |
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30 -S Log to syslog too |
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31 -a Use arping to validate offered address |
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32 -O Request option OPT from server (cumulative) |
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33 -o Don't request any options (unless -O is given) |
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34 -r Request this IP address |
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35 -x OPT:VAL Include option OPT in sent packets (cumulative) |
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36 -F Ask server to update DNS mapping for NAME |
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37 -H Send NAME as client hostname (default none) |
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38 -V VENDOR Vendor identifier (default 'toybox VERSION') |
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39 -C Don't send MAC as client identifier |
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40 -v Verbose |
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41 |
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42 Signals: |
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43 USR1 Renew current lease |
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44 USR2 Release current lease |
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45 |
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46 */ |
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47 |
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48 #define FOR_dhcp |
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49 #include "toys.h" |
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50 #include "toynet.h" |
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51 |
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52 // TODO: headers not in posix: |
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53 #include <netinet/ip.h> |
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54 #include <netinet/udp.h> |
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55 #include <netpacket/packet.h> |
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56 |
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57 #include <linux/filter.h> //FIXME: linux specific. fix for other OS ports |
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58 #include <linux/if_ether.h> |
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59 |
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60 GLOBALS( |
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61 char *iface; |
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62 char *pidfile; |
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63 char *script; |
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64 long retries; |
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65 long timeout; |
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66 long tryagain; |
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67 struct arg_list *req_opt; |
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68 char *req_ip; |
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69 struct arg_list *pkt_opt; |
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70 char *fdn_name; |
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71 char *hostname; |
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72 char *vendor_cls; |
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73 ) |
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74 |
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75 #define flag_get(f,v,d) ((toys.optflags & f) ? v : d) |
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76 #define flag_chk(f) ((toys.optflags & f) ? 1 : 0) |
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77 |
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78 #define STATE_INIT 0 |
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79 #define STATE_REQUESTING 1 |
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80 #define STATE_BOUND 2 |
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81 #define STATE_RENEWING 3 |
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82 #define STATE_REBINDING 4 |
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83 #define STATE_RENEW_REQUESTED 5 |
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84 #define STATE_RELEASED 6 |
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85 |
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86 #define BOOTP_BROADCAST 0x8000 |
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87 #define DHCP_MAGIC 0x63825363 |
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88 |
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89 #define DHCP_REQUEST 1 |
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90 #define DHCP_REPLY 2 |
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91 #define DHCP_HTYPE_ETHERNET 1 |
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92 |
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93 #define DHCPC_SERVER_PORT 67 |
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94 #define DHCPC_CLIENT_PORT 68 |
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95 |
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96 #define DHCPDISCOVER 1 |
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97 #define DHCPOFFER 2 |
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98 #define DHCPREQUEST 3 |
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99 #define DHCPACK 5 |
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100 #define DHCPNAK 6 |
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101 #define DHCPRELEASE 7 |
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102 |
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103 #define DHCP_OPTION_PADDING 0x00 |
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104 #define DHCP_OPTION_SUBNET_MASK 0x01 |
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105 #define DHCP_OPTION_ROUTER 0x03 |
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106 #define DHCP_OPTION_DNS_SERVER 0x06 |
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107 #define DHCP_OPTION_HOST_NAME 0x0c |
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108 #define DHCP_OPTION_BROADCAST 0x1c |
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109 #define DHCP_OPTION_REQ_IPADDR 0x32 |
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110 #define DHCP_OPTION_LEASE_TIME 0x33 |
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111 #define DHCP_OPTION_OVERLOAD 0x34 |
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112 #define DHCP_OPTION_MSG_TYPE 0x35 |
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113 #define DHCP_OPTION_SERVER_ID 0x36 |
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114 #define DHCP_OPTION_REQ_LIST 0x37 |
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115 #define DHCP_OPTION_MAX_SIZE 0x39 |
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116 #define DHCP_OPTION_CLIENTID 0x3D |
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117 #define DHCP_OPTION_VENDOR 0x3C |
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118 #define DHCP_OPTION_FQDN 0x51 |
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119 #define DHCP_OPTION_END 0xFF |
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120 |
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121 #define DHCP_NUM8 (1<<8) |
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122 #define DHCP_NUM16 (1<<9) |
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123 #define DHCP_NUM32 DHCP_NUM16 | DHCP_NUM8 |
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124 #define DHCP_STRING (1<<10) |
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125 #define DHCP_STRLST (1<<11) |
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126 #define DHCP_IP (1<<12) |
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127 #define DHCP_IPLIST (1<<13) |
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128 #define DHCP_IPPLST (1<<14) |
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129 #define DHCP_STCRTS (1<<15) |
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130 |
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131 #define LOG_SILENT 0x0 |
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132 #define LOG_CONSOLE 0x1 |
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133 #define LOG_SYSTEM 0x2 |
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134 |
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135 #define MODE_OFF 0 |
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136 #define MODE_RAW 1 |
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137 #define MODE_APP 2 |
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138 |
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139 static void (*dbg)(char *format, ...); |
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140 static void dummy(char *format, ...){ |
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141 return; |
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142 } |
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143 |
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144 typedef struct dhcpc_result_s { |
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145 struct in_addr serverid; |
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146 struct in_addr ipaddr; |
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147 struct in_addr netmask; |
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148 struct in_addr dnsaddr; |
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149 struct in_addr default_router; |
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150 uint32_t lease_time; |
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151 } dhcpc_result_t; |
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152 |
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153 typedef struct __attribute__((packed)) dhcp_msg_s { |
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154 uint8_t op; |
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155 uint8_t htype; |
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156 uint8_t hlen; |
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157 uint8_t hops; |
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158 uint32_t xid; |
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159 uint16_t secs; |
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160 uint16_t flags; |
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161 uint32_t ciaddr; |
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162 uint32_t yiaddr; |
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163 uint32_t nsiaddr; |
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164 uint32_t ngiaddr; |
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165 uint8_t chaddr[16]; |
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166 uint8_t sname[64]; |
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167 uint8_t file[128]; |
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168 uint32_t cookie; |
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169 uint8_t options[308]; |
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170 } dhcp_msg_t; |
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171 |
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172 typedef struct __attribute__((packed)) dhcp_raw_s { |
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173 struct iphdr iph; |
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174 struct udphdr udph; |
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175 dhcp_msg_t dhcp; |
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176 } dhcp_raw_t; |
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177 |
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178 typedef struct dhcpc_state_s { |
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179 uint8_t macaddr[6]; |
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180 char *iface; |
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181 int ifindex; |
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182 int sockfd; |
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183 int status; |
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184 int mode; |
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185 uint32_t mask; |
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186 struct in_addr ipaddr; |
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187 struct in_addr serverid; |
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188 dhcp_msg_t pdhcp; |
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189 } dhcpc_state_t; |
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190 |
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191 typedef struct option_val_s { |
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192 char *key; |
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193 uint16_t code; |
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194 void *val; |
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195 size_t len; |
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196 } option_val_t; |
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197 |
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198 struct fd_pair { int rd; int wr; }; |
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199 static uint32_t xid; |
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200 static dhcpc_state_t *state; |
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201 static struct fd_pair sigfd; |
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202 uint8_t bmacaddr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
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203 int set = 1; |
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204 uint8_t infomode = LOG_CONSOLE; |
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205 uint8_t raw_opt[29]; |
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206 int raw_optcount = 0; |
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207 struct arg_list *x_opt; |
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208 in_addr_t server = 0; |
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209 |
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210 static option_val_t *msgopt_list = NULL; |
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211 static option_val_t options_list[] = { |
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212 {"lease" , DHCP_NUM32 | 0x33, NULL, 0}, |
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213 {"subnet" , DHCP_IP | 0x01, NULL, 0}, |
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214 {"broadcast" , DHCP_IP | 0x1c, NULL, 0}, |
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215 {"router" , DHCP_IP | 0x03, NULL, 0}, |
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216 {"ipttl" , DHCP_NUM8 | 0x17, NULL, 0}, |
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217 {"mtu" , DHCP_NUM16 | 0x1a, NULL, 0}, |
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218 {"hostname" , DHCP_STRING | 0x0c, NULL, 0}, |
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219 {"domain" , DHCP_STRING | 0x0f, NULL, 0}, |
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220 {"search" , DHCP_STRLST | 0x77, NULL, 0}, |
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221 {"nisdomain" , DHCP_STRING | 0x28, NULL, 0}, |
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222 {"timezone" , DHCP_NUM32 | 0x02, NULL, 0}, |
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223 {"tftp" , DHCP_STRING | 0x42, NULL, 0}, |
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224 {"bootfile" , DHCP_STRING | 0x43, NULL, 0}, |
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225 {"bootsize" , DHCP_NUM16 | 0x0d, NULL, 0}, |
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226 {"rootpath" , DHCP_STRING | 0x11, NULL, 0}, |
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227 {"wpad" , DHCP_STRING | 0xfc, NULL, 0}, |
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228 {"serverid" , DHCP_IP | 0x36, NULL, 0}, |
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229 {"message" , DHCP_STRING | 0x38, NULL, 0}, |
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230 {"vlanid" , DHCP_NUM32 | 0x84, NULL, 0}, |
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231 {"vlanpriority" , DHCP_NUM32 | 0x85, NULL, 0}, |
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232 {"dns" , DHCP_IPLIST | 0x06, NULL, 0}, |
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233 {"wins" , DHCP_IPLIST | 0x2c, NULL, 0}, |
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234 {"nissrv" , DHCP_IPLIST | 0x29, NULL, 0}, |
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235 {"ntpsrv" , DHCP_IPLIST | 0x2a, NULL, 0}, |
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236 {"lprsrv" , DHCP_IPLIST | 0x09, NULL, 0}, |
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237 {"swapsrv" , DHCP_IP | 0x10, NULL, 0}, |
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238 {"routes" , DHCP_STCRTS | 0x21, NULL, 0}, |
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239 {"staticroutes" , DHCP_STCRTS | 0x79, NULL, 0}, |
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240 {"msstaticroutes" , DHCP_STCRTS | 0xf9, NULL, 0}, |
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parents:
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|
241 }; |
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242 |
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Rob Landley <rob@landley.net>
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|
243 static struct sock_filter filter_instr[] = { |
03f72b57a092
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|
244 BPF_STMT(BPF_LD|BPF_B|BPF_ABS, 9), |
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|
245 BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, IPPROTO_UDP, 0, 6), |
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246 BPF_STMT(BPF_LD|BPF_H|BPF_ABS, 6), |
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247 BPF_JUMP(BPF_JMP|BPF_JSET|BPF_K, 0x1fff, 4, 0), |
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|
248 BPF_STMT(BPF_LDX|BPF_B|BPF_MSH, 0), BPF_STMT(BPF_LD|BPF_H|BPF_IND, 2), |
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|
249 BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, 68, 0, 1), |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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250 BPF_STMT(BPF_RET|BPF_K, 0xffffffff), BPF_STMT(BPF_RET|BPF_K, 0), |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
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251 }; |
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252 |
03f72b57a092
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253 static struct sock_fprog filter_prog = { |
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254 .len = ARRAY_LEN(filter_instr), |
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255 .filter = (struct sock_filter *) filter_instr, |
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parents:
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256 }; |
03f72b57a092
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parents:
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257 |
03f72b57a092
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parents:
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258 // calculate options size. |
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259 static int dhcp_opt_size(uint8_t *optionptr) |
03f72b57a092
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parents:
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260 { |
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261 int i = 0; |
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parents:
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262 for(;optionptr[i] != 0xff; i++) if(optionptr[i] != 0x00) i += optionptr[i + 1] + 2 -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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263 return i; |
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DHCP client and server, from Ashwini Sharma.
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parents:
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264 } |
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parents:
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265 |
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266 // calculates checksum for dhcp messages. |
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parents:
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267 static uint16_t dhcp_checksum(void *addr, int count) |
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parents:
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268 { |
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269 int32_t sum = 0; |
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270 uint16_t tmp = 0, *source = (uint16_t *)addr; |
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271 |
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272 while (count > 1) { |
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273 sum += *source++; |
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parents:
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274 count -= 2; |
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parents:
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275 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
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276 if (count > 0) { |
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277 *(uint8_t*)&tmp = *(uint8_t*)source; |
03f72b57a092
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278 sum += tmp; |
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DHCP client and server, from Ashwini Sharma.
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parents:
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279 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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280 while (sum >> 16) sum = (sum & 0xffff) + (sum >> 16); |
03f72b57a092
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281 return ~sum; |
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DHCP client and server, from Ashwini Sharma.
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parents:
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282 } |
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parents:
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283 |
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DHCP client and server, from Ashwini Sharma.
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284 // gets information of INTERFACE and updates IFINDEX, MAC and IP |
03f72b57a092
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parents:
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285 static int get_interface( char *interface, int *ifindex, uint32_t *oip, uint8_t *mac) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
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286 { |
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DHCP client and server, from Ashwini Sharma.
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parents:
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287 struct ifreq req; |
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parents:
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288 struct sockaddr_in *ip; |
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289 int fd = xsocket(AF_INET, SOCK_RAW, IPPROTO_RAW); |
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290 |
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291 req.ifr_addr.sa_family = AF_INET; |
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parents:
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292 strncpy(req.ifr_name, interface, IFNAMSIZ); |
03f72b57a092
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parents:
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293 req.ifr_name[IFNAMSIZ-1] = '\0'; |
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parents:
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294 |
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295 xioctl(fd, SIOCGIFFLAGS, &req); |
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296 if (!(req.ifr_flags & IFF_UP)) return -1; |
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297 |
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parents:
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298 if (oip) { |
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parents:
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299 xioctl(fd, SIOCGIFADDR, &req); |
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DHCP client and server, from Ashwini Sharma.
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parents:
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300 ip = (struct sockaddr_in*) &req.ifr_addr; |
03f72b57a092
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parents:
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301 dbg("IP %s\n", inet_ntoa(ip->sin_addr)); |
03f72b57a092
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parents:
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302 *oip = ntohl(ip->sin_addr.s_addr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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303 } |
03f72b57a092
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Rob Landley <rob@landley.net>
parents:
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304 if (ifindex) { |
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parents:
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305 xioctl(fd, SIOCGIFINDEX, &req); |
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DHCP client and server, from Ashwini Sharma.
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parents:
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306 dbg("Adapter index %d\n", req.ifr_ifindex); |
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parents:
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307 *ifindex = req.ifr_ifindex; |
03f72b57a092
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parents:
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|
308 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
309 if (mac) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
310 xioctl(fd, SIOCGIFHWADDR, &req); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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311 memcpy(mac, req.ifr_hwaddr.sa_data, 6); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
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312 dbg("MAC %02x:%02x:%02x:%02x:%02x:%02x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
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|
313 } |
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Rob Landley <rob@landley.net>
parents:
diff
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314 close(fd); |
03f72b57a092
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Rob Landley <rob@landley.net>
parents:
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|
315 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
diff
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|
316 } |
03f72b57a092
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parents:
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|
317 |
03f72b57a092
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Rob Landley <rob@landley.net>
parents:
diff
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|
318 static int dhcp_daemon(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
319 { |
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Rob Landley <rob@landley.net>
parents:
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320 int fd = open("/dev/null", O_RDWR); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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321 if (fd < 0) fd = xcreate("/", O_RDONLY, 0666); |
03f72b57a092
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Rob Landley <rob@landley.net>
parents:
diff
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322 pid_t pid = fork(); |
03f72b57a092
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Rob Landley <rob@landley.net>
parents:
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|
323 |
03f72b57a092
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Rob Landley <rob@landley.net>
parents:
diff
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324 if (pid < 0) perror_exit("DAEMON: failed to fork"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
diff
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|
325 if (pid) exit(EXIT_SUCCESS); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
326 |
03f72b57a092
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Rob Landley <rob@landley.net>
parents:
diff
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|
327 setsid(); |
03f72b57a092
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Rob Landley <rob@landley.net>
parents:
diff
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|
328 dup2(fd, 0); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
329 dup2(fd, 1); |
03f72b57a092
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Rob Landley <rob@landley.net>
parents:
diff
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|
330 dup2(fd, 2); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
331 if (fd > 2) xclose(fd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
332 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
333 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
334 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
335 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
336 /* |
03f72b57a092
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parents:
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|
337 *logs messeges to syslog or console |
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parents:
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338 *opening the log is still left with applet. |
03f72b57a092
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parents:
diff
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|
339 *FIXME: move to more relevent lib. probably libc.c |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
diff
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|
340 */ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
341 static void infomsg(uint8_t infomode, char *s, ...) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
diff
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|
342 { |
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Rob Landley <rob@landley.net>
parents:
diff
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|
343 int used; |
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Rob Landley <rob@landley.net>
parents:
diff
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|
344 char *msg; |
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Rob Landley <rob@landley.net>
parents:
diff
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|
345 va_list p, t; |
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parents:
diff
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|
346 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
diff
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|
347 if (infomode == LOG_SILENT) return; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
diff
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|
348 va_start(p, s); |
03f72b57a092
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Rob Landley <rob@landley.net>
parents:
diff
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|
349 va_copy(t, p); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
350 used = vsnprintf(NULL, 0, s, t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
351 used++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
352 va_end(t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
353 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
354 msg = xmalloc(used); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
355 vsnprintf(msg, used, s, p); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
356 va_end(p); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
357 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
358 if (infomode & LOG_SYSTEM) syslog(LOG_INFO, "%s", msg); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
359 if (infomode & LOG_CONSOLE) printf("%s\n", msg); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
360 free(msg); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
361 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
362 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
363 /* |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
364 * Writes self PID in file PATH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
365 * FIXME: libc implementation only writes in /var/run |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
366 * this is more generic as some implemenation may provide |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
367 * arguments to write in specific file. as dhcpd does. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
368 */ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
369 static void write_pid(char *path) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
370 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
371 int pidfile = open(path, O_CREAT | O_WRONLY | O_TRUNC, 0666); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
372 if (pidfile > 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
373 char *pidbuf = utoa(getpid()); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
374 write(pidfile, pidbuf, strlen(pidbuf)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
375 close(pidfile); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
376 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
377 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
378 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
379 // String STR to UINT32 conversion strored in VAR |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
380 static long strtou32( char *str) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
381 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
382 char *endptr = NULL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
383 int base = 10; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
384 errno=0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
385 if (str[0]=='0' && (str[1]=='x' || str[1]=='X')) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
386 base = 16; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
387 str+=2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
388 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
389 long ret_val = strtol(str, &endptr, base); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
390 if (errno) return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
391 else if (endptr && (*endptr!='\0'||endptr == str)) return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
392 return ret_val; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
393 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
394 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
395 // IP String STR to binary data. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
396 static int striptovar( char *str, void *var) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
397 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
398 in_addr_t addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
399 if(!str) error_exit("NULL address string."); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
400 addr = inet_addr(str); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
401 if(addr == -1) error_exit("Wrong address %s.",str ); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
402 *((uint32_t*)(var)) = (uint32_t)addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
403 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
404 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
405 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
406 // String to dhcp option conversion |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
407 static int strtoopt( char *str, uint8_t optonly) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
408 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
409 char *option, *valstr, *grp, *tp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
410 long optcode = 0, convtmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
411 uint16_t flag = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
412 uint32_t mask, nip, router; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
413 int count, size = ARRAY_LEN(options_list); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
414 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
415 if (!*str) return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
416 option = strtok((char*)str, ":"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
417 if (!option) return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
418 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
419 dbg("-x option : %s ", option); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
420 optcode = strtou32(option); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
421 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
422 if (optcode > 0 && optcode < 256) { // raw option |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
423 for (count = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
424 if ((options_list[count].code & 0X00FF) == optcode) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
425 flag = (options_list[count].code & 0XFF00); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
426 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
427 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
428 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
429 if (count == size) error_exit("Obsolete OR Unknown Option : %s", option); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
430 } else { // string option |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
431 for (count = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
432 if (!strcmp(options_list[count].key, option)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
433 flag = (options_list[count].code & 0XFF00); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
434 optcode = (options_list[count].code & 0X00FF); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
435 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
436 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
437 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
438 if (count == size) error_exit("Obsolete OR Unknown Option : %s", option); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
439 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
440 if (!flag || !optcode) return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
441 if (optonly) return optcode; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
442 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
443 valstr = strtok(NULL, "\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
444 if (!valstr) error_exit("option %s has no value defined.\n", option); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
445 dbg(" value : %-20s \n ", valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
446 switch (flag) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
447 case DHCP_NUM32: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
448 options_list[count].len = sizeof(uint32_t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
449 options_list[count].val = xmalloc(sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
450 convtmp = strtou32(valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
451 if (convtmp < 0) error_exit("Invalid/wrong formated number %s", valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
452 convtmp = htonl(convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
453 memcpy(options_list[count].val, &convtmp, sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
454 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
455 case DHCP_NUM16: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
456 options_list[count].len = sizeof(uint16_t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
457 options_list[count].val = xmalloc(sizeof(uint16_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
458 convtmp = strtou32(valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
459 if (convtmp < 0) error_exit("Invalid/malformed number %s", valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
460 convtmp = htons(convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
461 memcpy(options_list[count].val, &convtmp, sizeof(uint16_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
462 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
463 case DHCP_NUM8: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
464 options_list[count].len = sizeof(uint8_t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
465 options_list[count].val = xmalloc(sizeof(uint8_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
466 convtmp = strtou32(valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
467 if (convtmp < 0) error_exit("Invalid/malformed number %s", valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
468 memcpy(options_list[count].val, &convtmp, sizeof(uint8_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
469 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
470 case DHCP_IP: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
471 options_list[count].len = sizeof(uint32_t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
472 options_list[count].val = xmalloc(sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
473 striptovar(valstr, options_list[count].val); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
474 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
475 case DHCP_STRING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
476 options_list[count].len = strlen(valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
477 options_list[count].val = strdup(valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
478 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
479 case DHCP_IPLIST: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
480 while(valstr){ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
481 options_list[count].val = xrealloc(options_list[count].val, options_list[count].len + sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
482 striptovar(valstr, ((uint8_t*)options_list[count].val)+options_list[count].len); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
483 options_list[count].len += sizeof(uint32_t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
484 valstr = strtok(NULL," \t"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
485 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
486 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
487 case DHCP_STRLST: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
488 case DHCP_IPPLST: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
489 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
490 case DHCP_STCRTS: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
491 /* Option binary format: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
492 * mask [one byte, 0..32] |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
493 * ip [0..4 bytes depending on mask] |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
494 * router [4 bytes] |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
495 * may be repeated |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
496 * staticroutes 10.0.0.0/8 10.127.0.1, 10.11.12.0/24 10.11.12.1 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
497 */ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
498 grp = strtok(valstr, ",");; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
499 while(grp){ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
500 while(*grp == ' ' || *grp == '\t') grp++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
501 tp = strchr(grp, '/'); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
502 if (!tp) error_exit("malformed static route option"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
503 *tp = '\0'; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
504 mask = strtol(++tp, &tp, 10); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
505 if (striptovar(grp, (uint8_t*)&nip) < 0) error_exit("malformed static route option"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
506 while(*tp == ' ' || *tp == '\t' || *tp == '-') tp++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
507 if (striptovar(tp, (uint8_t*)&router) < 0) error_exit("malformed static route option"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
508 options_list[count].val = xrealloc(options_list[count].val, options_list[count].len + 1 + mask/8 + 4); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
509 memcpy(((uint8_t*)options_list[count].val)+options_list[count].len, &mask, 1); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
510 options_list[count].len += 1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
511 memcpy(((uint8_t*)options_list[count].val)+options_list[count].len, &nip, mask/8); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
512 options_list[count].len += mask/8; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
513 memcpy(((uint8_t*)options_list[count].val)+options_list[count].len, &router, 4); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
514 options_list[count].len += 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
515 tp = NULL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
516 grp = strtok(NULL, ","); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
517 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
518 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
519 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
520 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
521 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
522 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
523 // Creates environment pointers from RES to use in script |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
524 static int fill_envp(dhcpc_result_t *res) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
525 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
526 struct in_addr temp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
527 int size = ARRAY_LEN(options_list), count, ret = -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
528 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
529 ret = setenv("interface", state->iface, 1); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
530 if (!res) return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
531 if (res->ipaddr.s_addr) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
532 temp.s_addr = htonl(res->ipaddr.s_addr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
533 ret = setenv("ip", inet_ntoa(temp), 1); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
534 if (ret) return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
535 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
536 if (msgopt_list) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
537 for (count = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
538 if ((msgopt_list[count].len == 0) || (msgopt_list[count].val == NULL)) continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
539 ret = setenv(msgopt_list[count].key, (char*)msgopt_list[count].val, 1); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
540 if (ret) return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
541 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
542 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
543 return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
544 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
545 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
546 // Executes Script NAME. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
547 static void run_script(dhcpc_result_t *res, char *name) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
548 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
549 volatile int error = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
550 pid_t pid; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
551 char *argv[3]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
552 struct stat sts; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
553 char *script = flag_get(FLAG_s, TT.script, "/usr/share/dhcp/default.script"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
554 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
555 if (stat(script, &sts) == -1 && errno == ENOENT) return; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
556 if (fill_envp(res)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
557 dbg("Failed to create environment variables."); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
558 return; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
559 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
560 dbg("Executing %s %s\n", script, name); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
561 argv[0] = (char*) script; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
562 argv[1] = (char*) name; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
563 argv[2] = NULL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
564 fflush(NULL); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
565 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
566 pid = vfork(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
567 if (pid < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
568 dbg("Fork failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
569 return; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
570 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
571 if (!pid) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
572 execvp(argv[0], argv); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
573 error = errno; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
574 _exit(111); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
575 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
576 if (error) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
577 waitpid(pid, NULL,0); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
578 errno = error; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
579 perror_msg("script exec failed"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
580 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
581 dbg("script complete.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
582 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
583 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
584 // returns a randome ID |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
585 static uint32_t getxid(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
586 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
587 uint32_t randnum; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
588 int fd = xopen("/dev/urandom", O_RDONLY); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
589 xreadall(fd, &randnum, sizeof(randnum)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
590 xclose(fd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
591 return randnum; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
592 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
593 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
594 // opens socket in raw mode. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
595 static int mode_raw(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
596 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
597 state->mode = MODE_OFF; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
598 struct sockaddr_ll sock; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
599 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
600 if (state->sockfd > 0) close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
601 dbg("Opening raw socket on ifindex %d\n", state->ifindex); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
602 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
603 state->sockfd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
604 if (state->sockfd < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
605 dbg("MODE RAW : socket fail ERROR : %d\n", state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
606 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
607 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
608 dbg("Got raw socket fd %d\n", state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
609 memset(&sock, 0, sizeof(sock)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
610 sock.sll_family = AF_PACKET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
611 sock.sll_protocol = htons(ETH_P_IP); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
612 sock.sll_ifindex = state->ifindex; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
613 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
614 if (bind(state->sockfd, (struct sockaddr *) &sock, sizeof(sock))) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
615 dbg("MODE RAW : bind fail.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
616 close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
617 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
618 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
619 state->mode = MODE_RAW; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
620 if (setsockopt(state->sockfd, SOL_SOCKET, SO_ATTACH_FILTER, &filter_prog, sizeof(filter_prog)) < 0) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
621 dbg("MODE RAW : filter attach fail.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
622 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
623 dbg("MODE RAW : success\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
624 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
625 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
626 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
627 // opens UDP socket |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
628 static int mode_app(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
629 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
630 struct sockaddr_in addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
631 struct ifreq ifr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
632 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
633 state->mode = MODE_OFF; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
634 if (state->sockfd > 0) close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
635 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
636 dbg("Opening listen socket on *:%d %s\n", DHCPC_CLIENT_PORT, state->iface); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
637 state->sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
638 if (state->sockfd < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
639 dbg("MODE APP : socket fail ERROR: %d\n", state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
640 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
641 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
642 setsockopt(state->sockfd, SOL_SOCKET, SO_REUSEADDR, &set, sizeof(set)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
643 if (setsockopt(state->sockfd, SOL_SOCKET, SO_BROADCAST, &set, sizeof(set)) == -1) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
644 dbg("MODE APP : brodcast failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
645 close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
646 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
647 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
648 strncpy(ifr.ifr_name, state->iface, IFNAMSIZ); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
649 ifr.ifr_name[IFNAMSIZ -1] = '\0'; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
650 setsockopt(state->sockfd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
651 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
652 memset(&addr, 0, sizeof(addr)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
653 addr.sin_family = AF_INET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
654 addr.sin_port = htons(DHCPC_CLIENT_PORT); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
655 addr.sin_addr.s_addr = INADDR_ANY ; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
656 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
657 if (bind(state->sockfd, (struct sockaddr *) &addr, sizeof(addr))) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
658 close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
659 dbg("MODE APP : bind failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
660 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
661 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
662 state->mode = MODE_APP; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
663 dbg("MODE APP : success\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
664 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
665 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
666 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
667 static int read_raw(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
668 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
669 dhcp_raw_t packet; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
670 uint16_t check; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
671 int bytes = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
672 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
673 memset(&packet, 0, sizeof(packet)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
674 if ((bytes = read(state->sockfd, &packet, sizeof(packet))) < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
675 dbg("\tPacket read error, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
676 return bytes; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
677 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
678 if (bytes < (int) (sizeof(packet.iph) + sizeof(packet.udph))) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
679 dbg("\tPacket is too short, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
680 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
681 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
682 if (bytes < ntohs(packet.iph.tot_len)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
683 dbg("\tOversized packet, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
684 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
685 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
686 // ignore any extra garbage bytes |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
687 bytes = ntohs(packet.iph.tot_len); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
688 // make sure its the right packet for us, and that it passes sanity checks |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
689 if (packet.iph.protocol != IPPROTO_UDP || packet.iph.version != IPVERSION |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
690 || packet.iph.ihl != (sizeof(packet.iph) >> 2) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
691 || packet.udph.dest != htons(DHCPC_CLIENT_PORT) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
692 || ntohs(packet.udph.len) != (uint16_t)(bytes - sizeof(packet.iph))) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
693 dbg("\tUnrelated/bogus packet, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
694 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
695 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
696 // verify IP checksum |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
697 check = packet.iph.check; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
698 packet.iph.check = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
699 if (check != dhcp_checksum(&packet.iph, sizeof(packet.iph))) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
700 dbg("\tBad IP header checksum, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
701 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
702 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
703 memset(&packet.iph, 0, ((size_t) &((struct iphdr *)0)->protocol)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
704 packet.iph.tot_len = packet.udph.len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
705 check = packet.udph.check; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
706 packet.udph.check = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
707 if (check && check != dhcp_checksum(&packet, bytes)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
708 dbg("\tPacket with bad UDP checksum received, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
709 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
710 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
711 memcpy(&state->pdhcp, &packet.dhcp, bytes - (sizeof(packet.iph) + sizeof(packet.udph))); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
712 if (state->pdhcp.cookie != htonl(DHCP_MAGIC)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
713 dbg("\tPacket with bad magic, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
714 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
715 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
716 return bytes - sizeof(packet.iph) - sizeof(packet.udph); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
717 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
718 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
719 static int read_app(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
720 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
721 int ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
722 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
723 memset(&state->pdhcp, 0, sizeof(dhcp_msg_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
724 if ((ret = read(state->sockfd, &state->pdhcp, sizeof(dhcp_msg_t))) < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
725 dbg("Packet read error, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
726 return ret; /* returns -1 */ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
727 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
728 if (state->pdhcp.cookie != htonl(DHCP_MAGIC)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
729 dbg("Packet with bad magic, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
730 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
731 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
732 return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
733 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
734 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
735 // Sends data through raw socket. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
736 static int send_raw(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
737 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
738 struct sockaddr_ll dest_sll; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
739 dhcp_raw_t packet; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
740 unsigned padding; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
741 int fd, result = -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
742 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
743 memset(&packet, 0, sizeof(dhcp_raw_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
744 memcpy(&packet.dhcp, &state->pdhcp, sizeof(dhcp_msg_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
745 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
746 if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
747 dbg("SEND RAW: socket failed\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
748 return result; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
749 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
750 memset(&dest_sll, 0, sizeof(dest_sll)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
751 dest_sll.sll_family = AF_PACKET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
752 dest_sll.sll_protocol = htons(ETH_P_IP); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
753 dest_sll.sll_ifindex = state->ifindex; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
754 dest_sll.sll_halen = 6; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
755 memcpy(dest_sll.sll_addr, bmacaddr , 6); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
756 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
757 if (bind(fd, (struct sockaddr *) &dest_sll, sizeof(dest_sll)) < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
758 dbg("SEND RAW: bind failed\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
759 close(fd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
760 return result; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
761 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
762 padding = 308 - 1 - dhcp_opt_size(state->pdhcp.options); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
763 packet.iph.protocol = IPPROTO_UDP; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
764 packet.iph.saddr = INADDR_ANY; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
765 packet.iph.daddr = INADDR_BROADCAST; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
766 packet.udph.source = htons(DHCPC_CLIENT_PORT); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
767 packet.udph.dest = htons(DHCPC_SERVER_PORT); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
768 packet.udph.len = htons(sizeof(dhcp_raw_t) - sizeof(struct iphdr) - padding); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
769 packet.iph.tot_len = packet.udph.len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
770 packet.udph.check = dhcp_checksum(&packet, sizeof(dhcp_raw_t) - padding); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
771 packet.iph.tot_len = htons(sizeof(dhcp_raw_t) - padding); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
772 packet.iph.ihl = sizeof(packet.iph) >> 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
773 packet.iph.version = IPVERSION; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
774 packet.iph.ttl = IPDEFTTL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
775 packet.iph.check = dhcp_checksum(&packet.iph, sizeof(packet.iph)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
776 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
777 result = sendto(fd, &packet, sizeof(dhcp_raw_t) - padding, 0, |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
778 (struct sockaddr *) &dest_sll, sizeof(dest_sll)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
779 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
780 close(fd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
781 if (result < 0) dbg("SEND RAW: PACKET send error\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
782 return result; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
783 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
784 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
785 // Sends data through UDP socket. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
786 static int send_app(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
787 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
788 struct sockaddr_in cli; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
789 int fd, ret = -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
790 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
791 if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
792 dbg("SEND APP: sock failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
793 return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
794 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
795 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &set, sizeof(set)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
796 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
797 memset(&cli, 0, sizeof(cli)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
798 cli.sin_family = AF_INET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
799 cli.sin_port = htons(DHCPC_CLIENT_PORT); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
800 cli.sin_addr.s_addr = state->pdhcp.ciaddr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
801 if (bind(fd, (struct sockaddr *)&cli, sizeof(cli)) == -1) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
802 dbg("SEND APP: bind failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
803 goto error_fd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
804 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
805 memset(&cli, 0, sizeof(cli)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
806 cli.sin_family = AF_INET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
807 cli.sin_port = htons(DHCPC_SERVER_PORT); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
808 cli.sin_addr.s_addr = state->serverid.s_addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
809 if (connect(fd, (struct sockaddr *)&cli, sizeof(cli)) == -1) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
810 dbg("SEND APP: connect failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
811 goto error_fd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
812 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
813 int padding = 308 - 1 - dhcp_opt_size(state->pdhcp.options); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
814 if((ret = write(fd, &state->pdhcp, sizeof(dhcp_msg_t) - padding)) < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
815 dbg("SEND APP: write failed error %d\n", ret); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
816 goto error_fd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
817 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
818 dbg("SEND APP: write success wrote %d\n", ret); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
819 error_fd: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
820 close(fd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
821 return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
822 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
823 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
824 // Generic signal handler real handling is done in main funcrion. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
825 static void signal_handler(int sig) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
826 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
827 unsigned char ch = sig; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
828 if (write(sigfd.wr, &ch, 1) != 1) dbg("can't send signal\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
829 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
830 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
831 // signal setup for SIGUSR1 SIGUSR2 SIGTERM |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
832 static int setup_signal() |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
833 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
834 if (pipe((int *)&sigfd) < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
835 dbg("signal pipe failed\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
836 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
837 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
838 fcntl(sigfd.wr , F_SETFD, FD_CLOEXEC); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
839 fcntl(sigfd.rd , F_SETFD, FD_CLOEXEC); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
840 int flags = fcntl(sigfd.wr, F_GETFL); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
841 fcntl(sigfd.wr, F_SETFL, flags | O_NONBLOCK); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
842 signal(SIGUSR1, signal_handler); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
843 signal(SIGUSR2, signal_handler); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
844 signal(SIGTERM, signal_handler); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
845 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
846 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
847 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
848 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
849 // adds client id to dhcp packet |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
850 static uint8_t *dhcpc_addclientid(uint8_t *optptr) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
851 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
852 *optptr++ = DHCP_OPTION_CLIENTID; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
853 *optptr++ = 7; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
854 *optptr++ = 1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
855 memcpy(optptr, &state->macaddr, 6); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
856 return optptr + 6; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
857 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
858 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
859 // adds messege type to dhcp packet |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
860 static uint8_t *dhcpc_addmsgtype(uint8_t *optptr, uint8_t type) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
861 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
862 *optptr++ = DHCP_OPTION_MSG_TYPE; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
863 *optptr++ = 1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
864 *optptr++ = type; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
865 return optptr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
866 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
867 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
868 // adds max size to dhcp packet |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
869 static uint8_t *dhcpc_addmaxsize(uint8_t *optptr, uint16_t size) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
870 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
871 *optptr++ = DHCP_OPTION_MAX_SIZE; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
872 *optptr++ = 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
873 memcpy(optptr, &size, 2); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
874 return optptr + 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
875 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
876 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
877 static uint8_t *dhcpc_addstropt(uint8_t *optptr, uint8_t opcode, char* str, int len) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
878 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
879 *optptr++ = opcode; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
880 *optptr++ = len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
881 memcpy(optptr, str, len); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
882 return optptr + len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
883 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
884 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
885 // adds server id to dhcp packet. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
886 static uint8_t *dhcpc_addserverid(struct in_addr *serverid, uint8_t *optptr) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
887 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
888 *optptr++ = DHCP_OPTION_SERVER_ID; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
889 *optptr++ = 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
890 memcpy(optptr, &serverid->s_addr, 4); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
891 return optptr + 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
892 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
893 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
894 // adds requested ip address to dhcp packet. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
895 static uint8_t *dhcpc_addreqipaddr(struct in_addr *ipaddr, uint8_t *optptr) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
896 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
897 *optptr++ = DHCP_OPTION_REQ_IPADDR; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
898 *optptr++ = 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
899 memcpy(optptr, &ipaddr->s_addr, 4); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
900 return optptr + 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
901 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
902 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
903 // adds hostname to dhcp packet. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
904 static uint8_t *dhcpc_addfdnname(uint8_t *optptr, char *hname) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
905 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
906 int size = strlen(hname); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
907 *optptr++ = DHCP_OPTION_FQDN; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
908 *optptr++ = size + 3; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
909 *optptr++ = 0x1; //flags |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
910 optptr += 2; // two blank bytes |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
911 strncpy((char*)optptr, hname, size); // name |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
912 return optptr + size; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
913 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
914 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
915 // adds request options using -o,-O flag to dhcp packet |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
916 static uint8_t *dhcpc_addreqoptions(uint8_t *optptr) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
917 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
918 uint8_t *len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
919 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
920 *optptr++ = DHCP_OPTION_REQ_LIST; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
921 len = optptr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
922 *len = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
923 optptr++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
924 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
925 if (!flag_chk(FLAG_o)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
926 *len = 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
927 *optptr++ = DHCP_OPTION_SUBNET_MASK; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
928 *optptr++ = DHCP_OPTION_ROUTER; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
929 *optptr++ = DHCP_OPTION_DNS_SERVER; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
930 *optptr++ = DHCP_OPTION_BROADCAST; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
931 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
932 if (flag_chk(FLAG_O)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
933 memcpy(optptr++, raw_opt, raw_optcount); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
934 *len += raw_optcount; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
935 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
936 return optptr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
937 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
938 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
939 static uint8_t *dhcpc_addend(uint8_t *optptr) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
940 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
941 *optptr++ = DHCP_OPTION_END; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
942 return optptr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
943 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
944 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
945 // Sets values of -x options in dhcp discover and request packet. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
946 static uint8_t* set_xopt(uint8_t *optptr) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
947 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
948 int count; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
949 int size = ARRAY_LEN(options_list); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
950 for (count = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
951 if ((options_list[count].len == 0) || (options_list[count].val == NULL)) continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
952 *optptr++ = (uint8_t) (options_list[count].code & 0x00FF); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
953 *optptr++ = (uint8_t) options_list[count].len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
954 memcpy(optptr, options_list[count].val, options_list[count].len); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
955 optptr += options_list[count].len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
956 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
957 return optptr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
958 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
959 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
960 static uint32_t get_option_serverid (uint8_t *opt, dhcpc_result_t *presult) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
961 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
962 uint32_t var = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
963 while (*opt != DHCP_OPTION_SERVER_ID) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
964 if (*opt == DHCP_OPTION_END) return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
965 opt += opt[1] + 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
966 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
967 memcpy(&var, opt+2, sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
968 state->serverid.s_addr = var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
969 presult->serverid.s_addr = state->serverid.s_addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
970 presult->serverid.s_addr = ntohl(presult->serverid.s_addr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
971 return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
972 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
973 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
974 static uint8_t get_option_msgtype(uint8_t *opt) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
975 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
976 uint32_t var = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
977 while (*opt != DHCP_OPTION_MSG_TYPE) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
978 if (*opt == DHCP_OPTION_END) return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
979 opt += opt[1] + 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
980 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
981 memcpy(&var, opt+2, sizeof(uint8_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
982 return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
983 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
984 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
985 static uint8_t get_option_lease(uint8_t *opt, dhcpc_result_t *presult) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
986 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
987 uint32_t var = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
988 while (*opt != DHCP_OPTION_LEASE_TIME) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
989 if (*opt == DHCP_OPTION_END) return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
990 opt += opt[1] + 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
991 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
992 memcpy(&var, opt+2, sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
993 var = htonl(var); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
994 presult->lease_time = var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
995 return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
996 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
997 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
998 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
999 // sends dhcp msg of MSGTYPE |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1000 static int dhcpc_sendmsg(int msgtype) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1001 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1002 uint8_t *pend; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1003 struct in_addr rqsd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1004 char *vendor; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1005 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1006 // Create the common message header settings |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1007 memset(&state->pdhcp, 0, sizeof(dhcp_msg_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1008 state->pdhcp.op = DHCP_REQUEST; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1009 state->pdhcp.htype = DHCP_HTYPE_ETHERNET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1010 state->pdhcp.hlen = 6; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1011 state->pdhcp.xid = xid; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1012 memcpy(state->pdhcp.chaddr, state->macaddr, 6); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1013 memset(&state->pdhcp.chaddr[6], 0, 10); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1014 state->pdhcp.cookie = htonl(DHCP_MAGIC);; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1015 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1016 // Add the common header options |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1017 pend = state->pdhcp.options; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1018 pend = dhcpc_addmsgtype(pend, msgtype); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1019 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1020 if (!flag_chk(FLAG_C)) pend = dhcpc_addclientid(pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1021 // Handle the message specific settings |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1022 switch (msgtype) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1023 case DHCPDISCOVER: // Broadcast DISCOVER message to all servers |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1024 state->pdhcp.flags = htons(BOOTP_BROADCAST); // Broadcast bit. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1025 if (flag_chk(FLAG_r)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1026 inet_aton(TT.req_ip, &rqsd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1027 pend = dhcpc_addreqipaddr(&rqsd, pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1028 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1029 pend = dhcpc_addmaxsize(pend, htons(sizeof(dhcp_raw_t))); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1030 vendor = flag_get(FLAG_V, TT.vendor_cls, "toybox\0"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1031 pend = dhcpc_addstropt(pend, DHCP_OPTION_VENDOR, vendor, strlen(vendor)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1032 if (flag_chk(FLAG_H)) pend = dhcpc_addstropt(pend, DHCP_OPTION_HOST_NAME, TT.hostname, strlen(TT.hostname)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1033 if (flag_chk(FLAG_F)) pend = dhcpc_addfdnname(pend, TT.fdn_name); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1034 if ((!flag_chk(FLAG_o)) || flag_chk(FLAG_O)) pend = dhcpc_addreqoptions(pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1035 if (flag_chk(FLAG_x)) pend = set_xopt(pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1036 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1037 case DHCPREQUEST: // Send REQUEST message to the server that sent the *first* OFFER |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1038 state->pdhcp.flags = htons(BOOTP_BROADCAST); // Broadcast bit. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1039 if (state->status == STATE_RENEWING) memcpy(&state->pdhcp.ciaddr, &state->ipaddr.s_addr, 4); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1040 pend = dhcpc_addmaxsize(pend, htons(sizeof(dhcp_raw_t))); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1041 rqsd.s_addr = htonl(server); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1042 pend = dhcpc_addserverid(&rqsd, pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1043 pend = dhcpc_addreqipaddr(&state->ipaddr, pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1044 vendor = flag_get(FLAG_V, TT.vendor_cls, "toybox\0"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1045 pend = dhcpc_addstropt(pend, DHCP_OPTION_VENDOR, vendor, strlen(vendor)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1046 if (flag_chk(FLAG_H)) pend = dhcpc_addstropt(pend, DHCP_OPTION_HOST_NAME, TT.hostname, strlen(TT.hostname)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1047 if (flag_chk(FLAG_F)) pend = dhcpc_addfdnname(pend, TT.fdn_name); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1048 if ((!flag_chk(FLAG_o)) || flag_chk(FLAG_O)) pend = dhcpc_addreqoptions(pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1049 if (flag_chk(FLAG_x)) pend = set_xopt(pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1050 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1051 case DHCPRELEASE: // Send RELEASE message to the server. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1052 memcpy(&state->pdhcp.ciaddr, &state->ipaddr.s_addr, 4); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1053 rqsd.s_addr = htonl(server); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1054 pend = dhcpc_addserverid(&rqsd, pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1055 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1056 default: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1057 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1058 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1059 pend = dhcpc_addend(pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1060 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1061 if (state->mode == MODE_APP) return send_app(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1062 return send_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1063 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1064 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1065 /* |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1066 * parses options from received dhcp packet at OPTPTR and |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1067 * stores result in PRESULT or MSGOPT_LIST |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1068 */ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1069 static uint8_t dhcpc_parseoptions(dhcpc_result_t *presult, uint8_t *optptr) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1070 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1071 uint8_t type = 0, *options, overloaded = 0;; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1072 uint16_t flag = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1073 uint32_t convtmp = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1074 char *dest, *pfx; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1075 struct in_addr addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1076 int count, optlen, size = ARRAY_LEN(options_list); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1077 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1078 if (flag_chk(FLAG_x)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1079 if(msgopt_list){ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1080 for (count = 0; count < size; count++){ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1081 if(msgopt_list[count].val) free(msgopt_list[count].val); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1082 msgopt_list[count].val = NULL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1083 msgopt_list[count].len = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1084 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1085 } else { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1086 msgopt_list = xmalloc(sizeof(options_list)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1087 memcpy(msgopt_list, options_list, sizeof(options_list)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1088 for (count = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1089 msgopt_list[count].len = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1090 msgopt_list[count].val = NULL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1091 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1092 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1093 } else { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1094 msgopt_list = options_list; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1095 for (count = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1096 msgopt_list[count].len = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1097 if(msgopt_list[count].val) free(msgopt_list[count].val); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1098 msgopt_list[count].val = NULL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1099 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1100 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1101 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1102 while (*optptr != DHCP_OPTION_END) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1103 while (*optptr == DHCP_OPTION_PADDING) optptr++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1104 if (*optptr == DHCP_OPTION_OVERLOAD) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1105 overloaded = optptr[2]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1106 optptr += optptr[1] + 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1107 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1108 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1109 for (count = 0, flag = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1110 if ((msgopt_list[count].code & 0X00FF) == *optptr) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1111 flag = (msgopt_list[count].code & 0XFF00); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1112 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1113 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1114 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1115 switch (flag) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1116 case DHCP_NUM32: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1117 memcpy(&convtmp, &optptr[2], sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1118 convtmp = htonl(convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1119 sprintf(toybuf, "%u", convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1120 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1121 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1122 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1123 case DHCP_NUM16: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1124 memcpy(&convtmp, &optptr[2], sizeof(uint16_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1125 convtmp = htons(convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1126 sprintf(toybuf, "%u", convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1127 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1128 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1129 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1130 case DHCP_NUM8: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1131 memcpy(&convtmp, &optptr[2], sizeof(uint8_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1132 sprintf(toybuf, "%u", convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1133 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1134 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1135 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1136 case DHCP_IP: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1137 memcpy(&convtmp, &optptr[2], sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1138 addr.s_addr = convtmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1139 sprintf(toybuf, "%s", inet_ntoa(addr)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1140 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1141 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1142 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1143 case DHCP_STRING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1144 sprintf(toybuf, "%.*s", optptr[1], &optptr[2]); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1145 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1146 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1147 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1148 case DHCP_IPLIST: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1149 optlen = optptr[1]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1150 dest = toybuf; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1151 while (optlen) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1152 memcpy(&convtmp, &optptr[2], sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1153 addr.s_addr = convtmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1154 dest += sprintf(dest, "%s ", inet_ntoa(addr)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1155 optlen -= 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1156 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1157 *(dest - 1) = '\0'; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1158 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1159 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1160 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1161 case DHCP_STRLST: //FIXME: do smthing. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1162 case DHCP_IPPLST: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1163 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1164 case DHCP_STCRTS: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1165 pfx = ""; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1166 dest = toybuf; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1167 options = &optptr[2]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1168 optlen = optptr[1]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1169 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1170 while (optlen >= 1 + 4) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1171 uint32_t nip = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1172 int bytes; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1173 uint8_t *p_tmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1174 unsigned mask = *options; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1175 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1176 if (mask > 32) break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1177 optlen--; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1178 p_tmp = (void*) &nip; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1179 bytes = (mask + 7) / 8; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1180 while (--bytes >= 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1181 *p_tmp++ = *options++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1182 optlen--; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1183 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1184 if (optlen < 4) break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1185 dest += sprintf(dest, "%s%u.%u.%u.%u", pfx, ((uint8_t*) &nip)[0], |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1186 ((uint8_t*) &nip)[1], ((uint8_t*) &nip)[2], ((uint8_t*) &nip)[3]); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1187 pfx = " "; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1188 dest += sprintf(dest, "/%u ", mask); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1189 dest += sprintf(dest, "%u.%u.%u.%u", options[0], options[1], options[2], options[3]); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1190 options += 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1191 optlen -= 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1192 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1193 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1194 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1195 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1196 default: break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1197 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1198 optptr += optptr[1] + 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1199 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1200 if ((overloaded == 1) || (overloaded == 3)) dhcpc_parseoptions(presult, optptr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1201 if ((overloaded == 2) || (overloaded == 3)) dhcpc_parseoptions(presult, optptr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1202 return type; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1203 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1204 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1205 // parses recvd messege to check that it was for us. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1206 static uint8_t dhcpc_parsemsg(dhcpc_result_t *presult) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1207 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1208 if (state->pdhcp.op == DHCP_REPLY |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1209 && !memcmp(state->pdhcp.chaddr, state->macaddr, 6) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1210 && !memcmp(&state->pdhcp.xid, &xid, sizeof(xid))) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1211 memcpy(&presult->ipaddr.s_addr, &state->pdhcp.yiaddr, 4); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1212 presult->ipaddr.s_addr = ntohl(presult->ipaddr.s_addr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1213 return get_option_msgtype(state->pdhcp.options); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1214 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1215 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1216 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1217 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1218 // Sends a IP renew request. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1219 static void renew(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1220 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1221 infomsg(infomode, "Performing a DHCP renew"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1222 switch (state->status) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1223 case STATE_INIT: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1224 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1225 case STATE_BOUND: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1226 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1227 case STATE_RENEWING: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1228 case STATE_REBINDING: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1229 state->status = STATE_RENEW_REQUESTED; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1230 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1231 case STATE_RENEW_REQUESTED: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1232 run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1233 case STATE_REQUESTING: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1234 case STATE_RELEASED: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1235 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1236 state->status = STATE_INIT; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1237 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1238 default: break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1239 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1240 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1241 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1242 // Sends a IP release request. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1243 static void release(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1244 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1245 int len = sizeof("255.255.255.255\0"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1246 char buffer[len]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1247 struct in_addr temp_addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1248 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1249 mode_app(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1250 // send release packet |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1251 if (state->status == STATE_BOUND || state->status == STATE_RENEWING || state->status == STATE_REBINDING) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1252 temp_addr.s_addr = htonl(server); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1253 strncpy(buffer, inet_ntoa(temp_addr), sizeof(buffer)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1254 buffer[len - 1] = '\0'; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1255 temp_addr.s_addr = state->ipaddr.s_addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1256 infomsg( infomode, "Unicasting a release of %s to %s", inet_ntoa(temp_addr), buffer); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1257 dhcpc_sendmsg(DHCPRELEASE); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1258 run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1259 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1260 infomsg(infomode, "Entering released state"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1261 close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1262 state->sockfd = -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1263 state->mode = MODE_OFF; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1264 state->status = STATE_RELEASED; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1265 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1266 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1267 static void free_option_stores(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1268 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1269 int count, size = ARRAY_LEN(options_list); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1270 for (count = 0; count < size; count++) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1271 if (options_list[count].val) free(options_list[count].val); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1272 if(flag_chk(FLAG_x)){ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1273 for (count = 0; count < size; count++) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1274 if (msgopt_list[count].val) free(msgopt_list[count].val); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1275 free(msgopt_list); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1276 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1277 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1278 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1279 void dhcp_main(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1280 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1281 struct timeval tv; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1282 int retval, bufflen = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1283 dhcpc_result_t result; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1284 uint8_t packets = 0, retries = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1285 uint32_t timeout = 0, waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1286 fd_set rfds; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1287 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1288 xid = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1289 setlinebuf(stdout); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1290 dbg = dummy; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1291 if (flag_chk(FLAG_v)) dbg = xprintf; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1292 if (flag_chk(FLAG_p)) write_pid(TT.pidfile); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1293 retries = flag_get(FLAG_t, TT.retries, 3); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1294 if (flag_chk(FLAG_S)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1295 openlog("UDHCPC :", LOG_PID, LOG_DAEMON); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1296 infomode |= LOG_SYSTEM; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1297 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1298 infomsg(infomode, "dhcp started"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1299 if (flag_chk(FLAG_O)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1300 while (TT.req_opt) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1301 raw_opt[raw_optcount] = (uint8_t) strtoopt(TT.req_opt->arg, 1); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1302 raw_optcount++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1303 TT.req_opt = TT.req_opt->next; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1304 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1305 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1306 if (flag_chk(FLAG_x)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1307 while (TT.pkt_opt) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1308 (void) strtoopt(TT.pkt_opt->arg, 0); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1309 TT.pkt_opt = TT.pkt_opt->next; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1310 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1311 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1312 memset(&result, 0, sizeof(dhcpc_result_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1313 state = (dhcpc_state_t*) xmalloc(sizeof(dhcpc_state_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1314 memset(state, 0, sizeof(dhcpc_state_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1315 state->iface = flag_get(FLAG_i, TT.iface, "eth0"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1316 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1317 if (get_interface(state->iface, &state->ifindex, NULL, state->macaddr)) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1318 perror_exit("Failed to get interface %s", state->iface); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1319 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1320 run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1321 setup_signal(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1322 state->status = STATE_INIT; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1323 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1324 fcntl(state->sockfd, F_SETFD, FD_CLOEXEC); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1325 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1326 for (;;) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1327 FD_ZERO(&rfds); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1328 if (state->sockfd >= 0) FD_SET(state->sockfd, &rfds); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1329 FD_SET(sigfd.rd, &rfds); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1330 tv.tv_sec = timeout - waited; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1331 tv.tv_usec = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1332 retval = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1333 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1334 int maxfd = (sigfd.rd > state->sockfd)? sigfd.rd : state->sockfd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1335 dbg("select wait ....\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1336 uint32_t timestmp = time(NULL); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1337 if((retval = select(maxfd + 1, &rfds, NULL, NULL, &tv)) < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1338 if (errno == EINTR) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1339 waited += (unsigned) time(NULL) - timestmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1340 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1341 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1342 perror_exit("Error in select"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1343 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1344 if (!retval) { // Timed out |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1345 if (get_interface(state->iface, &state->ifindex, NULL, state->macaddr)) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1346 error_exit("Interface lost %s\n", state->iface); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1347 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1348 switch (state->status) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1349 case STATE_INIT: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1350 if (packets < retries) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1351 if (!packets) xid = getxid(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1352 run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1353 infomsg(infomode, "Sending discover..."); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1354 dhcpc_sendmsg(DHCPDISCOVER); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1355 server = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1356 timeout = flag_get(FLAG_T, TT.timeout, 3); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1357 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1358 packets++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1359 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1360 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1361 lease_fail: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1362 run_script(NULL,"leasefail"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1363 if (flag_chk(FLAG_n)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1364 infomsg(infomode, "Lease failed. Exiting"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1365 goto ret_with_sockfd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1366 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1367 if (flag_chk(FLAG_b)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1368 infomsg(infomode, "Lease failed. Going Daemon mode"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1369 dhcp_daemon(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1370 if (flag_chk(FLAG_p)) write_pid(TT.pidfile); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1371 toys.optflags &= ~FLAG_b; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1372 toys.optflags |= FLAG_f; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1373 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1374 timeout = flag_get(FLAG_A, TT.tryagain, 20); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1375 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1376 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1377 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1378 case STATE_REQUESTING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1379 if (packets < retries) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1380 memcpy(&state->ipaddr.s_addr,&state->pdhcp.yiaddr, 4); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1381 dhcpc_sendmsg(DHCPREQUEST); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1382 infomsg(infomode, "Sending select for %d.%d.%d.%d...", |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1383 (result.ipaddr.s_addr >> 24) & 0xff, (result.ipaddr.s_addr >> 16) & 0xff, (result.ipaddr.s_addr >> 8) & 0xff, (result.ipaddr.s_addr) & 0xff); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1384 timeout = flag_get(FLAG_T, TT.timeout, 3); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1385 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1386 packets++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1387 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1388 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1389 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1390 state->status = STATE_INIT; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1391 goto lease_fail; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1392 case STATE_BOUND: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1393 state->status = STATE_RENEWING; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1394 dbg("Entering renew state\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1395 // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1396 case STATE_RENEW_REQUESTED: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1397 case STATE_RENEWING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1398 renew_requested: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1399 if (timeout > 60) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1400 dhcpc_sendmsg(DHCPREQUEST); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1401 timeout >>= 1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1402 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1403 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1404 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1405 dbg("Entering rebinding state\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1406 state->status = STATE_REBINDING; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1407 // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1408 case STATE_REBINDING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1409 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1410 if (timeout > 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1411 dhcpc_sendmsg(DHCPREQUEST); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1412 timeout >>= 1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1413 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1414 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1415 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1416 infomsg(infomode, "Lease lost, entering INIT state"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1417 run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1418 state->status = STATE_INIT; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1419 timeout = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1420 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1421 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1422 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1423 default: break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1424 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1425 timeout = INT_MAX; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1426 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1427 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1428 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1429 if (FD_ISSET(sigfd.rd, &rfds)) { // Some Activity on RDFDs : is signal |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1430 unsigned char sig; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1431 if (read(sigfd.rd, &sig, 1) != 1) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1432 dbg("signal read failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1433 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1434 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1435 switch (sig) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1436 case SIGUSR1: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1437 infomsg(infomode, "Received SIGUSR1"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1438 renew(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1439 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1440 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1441 if (state->status == STATE_RENEW_REQUESTED) goto renew_requested; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1442 if (state->status == STATE_INIT) timeout = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1443 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1444 case SIGUSR2: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1445 infomsg(infomode, "Received SIGUSR2"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1446 release(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1447 timeout = INT_MAX; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1448 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1449 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1450 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1451 case SIGTERM: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1452 infomsg(infomode, "Received SIGTERM"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1453 if (flag_chk(FLAG_R)) release(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1454 goto ret_with_sockfd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1455 default: break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1456 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1457 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1458 if (FD_ISSET(state->sockfd, &rfds)) { // Some Activity on RDFDs : is socket |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1459 dbg("main sock read\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1460 uint8_t msgType; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1461 if (state->mode == MODE_RAW) bufflen = read_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1462 if (state->mode == MODE_APP) bufflen = read_app(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1463 if (bufflen < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1464 if (state->mode == MODE_RAW) mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1465 if (state->mode == MODE_APP) mode_app(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1466 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1467 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1468 waited += time(NULL) - timestmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1469 memset(&result, 0, sizeof(dhcpc_result_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1470 msgType = dhcpc_parsemsg(&result); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1471 if (msgType != DHCPNAK && result.ipaddr.s_addr == 0 ) continue; // no ip for me ignore |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1472 if (!msgType || !get_option_serverid(state->pdhcp.options, &result)) continue; //no server id ignore |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1473 if (msgType == DHCPOFFER && server == 0) server = result.serverid.s_addr; // select the server |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1474 if (result.serverid.s_addr != server) continue; // not from the server we requested ignore |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1475 dhcpc_parseoptions(&result, state->pdhcp.options); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1476 get_option_lease(state->pdhcp.options, &result); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1477 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1478 switch (state->status) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1479 case STATE_INIT: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1480 if (msgType == DHCPOFFER) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1481 state->status = STATE_REQUESTING; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1482 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1483 timeout = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1484 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1485 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1486 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1487 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1488 case STATE_REQUESTING: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1489 case STATE_RENEWING: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1490 case STATE_RENEW_REQUESTED: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1491 case STATE_REBINDING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1492 if (msgType == DHCPACK) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1493 timeout = result.lease_time / 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1494 run_script(&result, state->status == STATE_REQUESTING ? "bound" : "renew"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1495 state->status = STATE_BOUND; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1496 infomsg(infomode, "Lease of %d.%d.%d.%d obtained, lease time %d from server %d.%d.%d.%d", |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1497 (result.ipaddr.s_addr >> 24) & 0xff, (result.ipaddr.s_addr >> 16) & 0xff, (result.ipaddr.s_addr >> 8) & 0xff, (result.ipaddr.s_addr) & 0xff, |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1498 result.lease_time, |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1499 (result.serverid.s_addr >> 24) & 0xff, (result.serverid.s_addr >> 16) & 0xff, (result.serverid.s_addr >> 8) & 0xff, (result.serverid.s_addr) & 0xff); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1500 if (flag_chk(FLAG_q)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1501 if (flag_chk(FLAG_R)) release(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1502 goto ret_with_sockfd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1503 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1504 toys.optflags &= ~FLAG_n; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1505 if (!flag_chk(FLAG_f)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1506 dhcp_daemon(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1507 toys.optflags |= FLAG_f; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1508 if (flag_chk(FLAG_p)) write_pid(TT.pidfile); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1509 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1510 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1511 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1512 } else if (msgType == DHCPNAK) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1513 dbg("NACK received.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1514 run_script(&result, "nak"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1515 if (state->status != STATE_REQUESTING) run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1516 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1517 sleep(3); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1518 state->status = STATE_INIT; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1519 state->ipaddr.s_addr = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1520 server = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1521 timeout = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1522 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1523 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1524 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1525 continue; |