Mercurial > hg > toybox
annotate toys/pending/dhcp.c @ 1639:856b544f8fce draft
strncpy(optptr, hname, strlen(hname)) is really just strcpy().
author | Rob Landley <rob@landley.net> |
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date | Thu, 01 Jan 2015 16:49:55 -0600 |
parents | e0c9c5424864 |
children | 41efba077b75 |
rev | line source |
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1005
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DHCP client and server, from Ashwini Sharma.
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1 /* dhcp.c - DHCP client for dynamic network configuration. |
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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 |
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51 // TODO: headers not in posix: |
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52 #include <netinet/ip.h> |
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53 #include <netinet/udp.h> |
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54 #include <netpacket/packet.h> |
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55 |
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56 #include <linux/filter.h> //FIXME: linux specific. fix for other OS ports |
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57 #include <linux/if_ether.h> |
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58 |
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59 GLOBALS( |
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60 char *iface; |
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61 char *pidfile; |
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62 char *script; |
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63 long retries; |
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64 long timeout; |
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65 long tryagain; |
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66 struct arg_list *req_opt; |
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67 char *req_ip; |
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68 struct arg_list *pkt_opt; |
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69 char *fdn_name; |
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70 char *hostname; |
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71 char *vendor_cls; |
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72 ) |
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73 |
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74 #define flag_get(f,v,d) ((toys.optflags & f) ? v : d) |
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75 #define flag_chk(f) ((toys.optflags & f) ? 1 : 0) |
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76 |
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77 #define STATE_INIT 0 |
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78 #define STATE_REQUESTING 1 |
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79 #define STATE_BOUND 2 |
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80 #define STATE_RENEWING 3 |
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81 #define STATE_REBINDING 4 |
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82 #define STATE_RENEW_REQUESTED 5 |
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83 #define STATE_RELEASED 6 |
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84 |
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85 #define BOOTP_BROADCAST 0x8000 |
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86 #define DHCP_MAGIC 0x63825363 |
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87 |
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88 #define DHCP_REQUEST 1 |
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89 #define DHCP_REPLY 2 |
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90 #define DHCP_HTYPE_ETHERNET 1 |
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91 |
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92 #define DHCPC_SERVER_PORT 67 |
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93 #define DHCPC_CLIENT_PORT 68 |
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94 |
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95 #define DHCPDISCOVER 1 |
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96 #define DHCPOFFER 2 |
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97 #define DHCPREQUEST 3 |
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98 #define DHCPACK 5 |
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99 #define DHCPNAK 6 |
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100 #define DHCPRELEASE 7 |
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101 |
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102 #define DHCP_OPTION_PADDING 0x00 |
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103 #define DHCP_OPTION_SUBNET_MASK 0x01 |
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104 #define DHCP_OPTION_ROUTER 0x03 |
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105 #define DHCP_OPTION_DNS_SERVER 0x06 |
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106 #define DHCP_OPTION_HOST_NAME 0x0c |
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107 #define DHCP_OPTION_BROADCAST 0x1c |
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108 #define DHCP_OPTION_REQ_IPADDR 0x32 |
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109 #define DHCP_OPTION_LEASE_TIME 0x33 |
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110 #define DHCP_OPTION_OVERLOAD 0x34 |
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111 #define DHCP_OPTION_MSG_TYPE 0x35 |
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112 #define DHCP_OPTION_SERVER_ID 0x36 |
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113 #define DHCP_OPTION_REQ_LIST 0x37 |
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114 #define DHCP_OPTION_MAX_SIZE 0x39 |
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115 #define DHCP_OPTION_CLIENTID 0x3D |
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116 #define DHCP_OPTION_VENDOR 0x3C |
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117 #define DHCP_OPTION_FQDN 0x51 |
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118 #define DHCP_OPTION_END 0xFF |
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119 |
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120 #define DHCP_NUM8 (1<<8) |
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121 #define DHCP_NUM16 (1<<9) |
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122 #define DHCP_NUM32 DHCP_NUM16 | DHCP_NUM8 |
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123 #define DHCP_STRING (1<<10) |
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124 #define DHCP_STRLST (1<<11) |
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125 #define DHCP_IP (1<<12) |
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126 #define DHCP_IPLIST (1<<13) |
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127 #define DHCP_IPPLST (1<<14) |
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128 #define DHCP_STCRTS (1<<15) |
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129 |
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130 #define LOG_SILENT 0x0 |
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131 #define LOG_CONSOLE 0x1 |
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132 #define LOG_SYSTEM 0x2 |
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133 |
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134 #define MODE_OFF 0 |
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135 #define MODE_RAW 1 |
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136 #define MODE_APP 2 |
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137 |
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138 static void (*dbg)(char *format, ...); |
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139 static void dummy(char *format, ...){ |
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140 return; |
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141 } |
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142 |
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143 typedef struct dhcpc_result_s { |
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144 struct in_addr serverid; |
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145 struct in_addr ipaddr; |
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146 struct in_addr netmask; |
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147 struct in_addr dnsaddr; |
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148 struct in_addr default_router; |
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149 uint32_t lease_time; |
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150 } dhcpc_result_t; |
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151 |
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152 typedef struct __attribute__((packed)) dhcp_msg_s { |
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153 uint8_t op; |
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154 uint8_t htype; |
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155 uint8_t hlen; |
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156 uint8_t hops; |
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157 uint32_t xid; |
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158 uint16_t secs; |
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159 uint16_t flags; |
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160 uint32_t ciaddr; |
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161 uint32_t yiaddr; |
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162 uint32_t nsiaddr; |
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163 uint32_t ngiaddr; |
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164 uint8_t chaddr[16]; |
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165 uint8_t sname[64]; |
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166 uint8_t file[128]; |
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167 uint32_t cookie; |
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168 uint8_t options[308]; |
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169 } dhcp_msg_t; |
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170 |
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171 typedef struct __attribute__((packed)) dhcp_raw_s { |
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172 struct iphdr iph; |
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173 struct udphdr udph; |
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174 dhcp_msg_t dhcp; |
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175 } dhcp_raw_t; |
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176 |
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177 typedef struct dhcpc_state_s { |
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178 uint8_t macaddr[6]; |
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179 char *iface; |
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180 int ifindex; |
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181 int sockfd; |
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182 int status; |
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183 int mode; |
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184 uint32_t mask; |
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185 struct in_addr ipaddr; |
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186 struct in_addr serverid; |
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187 dhcp_msg_t pdhcp; |
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188 } dhcpc_state_t; |
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189 |
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190 typedef struct option_val_s { |
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191 char *key; |
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192 uint16_t code; |
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193 void *val; |
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194 size_t len; |
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195 } option_val_t; |
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196 |
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197 struct fd_pair { int rd; int wr; }; |
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198 static uint32_t xid; |
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199 static dhcpc_state_t *state; |
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200 static struct fd_pair sigfd; |
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201 uint8_t bmacaddr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
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202 int set = 1; |
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203 uint8_t infomode = LOG_CONSOLE; |
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204 uint8_t raw_opt[29]; |
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205 int raw_optcount = 0; |
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206 struct arg_list *x_opt; |
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207 in_addr_t server = 0; |
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208 |
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209 static option_val_t *msgopt_list = NULL; |
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210 static option_val_t options_list[] = { |
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211 {"lease" , DHCP_NUM32 | 0x33, NULL, 0}, |
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212 {"subnet" , DHCP_IP | 0x01, NULL, 0}, |
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213 {"broadcast" , DHCP_IP | 0x1c, NULL, 0}, |
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214 {"router" , DHCP_IP | 0x03, NULL, 0}, |
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215 {"ipttl" , DHCP_NUM8 | 0x17, NULL, 0}, |
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216 {"mtu" , DHCP_NUM16 | 0x1a, NULL, 0}, |
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217 {"hostname" , DHCP_STRING | 0x0c, NULL, 0}, |
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218 {"domain" , DHCP_STRING | 0x0f, NULL, 0}, |
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219 {"search" , DHCP_STRLST | 0x77, NULL, 0}, |
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220 {"nisdomain" , DHCP_STRING | 0x28, NULL, 0}, |
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221 {"timezone" , DHCP_NUM32 | 0x02, NULL, 0}, |
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222 {"tftp" , DHCP_STRING | 0x42, NULL, 0}, |
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223 {"bootfile" , DHCP_STRING | 0x43, NULL, 0}, |
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224 {"bootsize" , DHCP_NUM16 | 0x0d, NULL, 0}, |
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225 {"rootpath" , DHCP_STRING | 0x11, NULL, 0}, |
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226 {"wpad" , DHCP_STRING | 0xfc, NULL, 0}, |
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227 {"serverid" , DHCP_IP | 0x36, NULL, 0}, |
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228 {"message" , DHCP_STRING | 0x38, NULL, 0}, |
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229 {"vlanid" , DHCP_NUM32 | 0x84, NULL, 0}, |
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230 {"vlanpriority" , DHCP_NUM32 | 0x85, NULL, 0}, |
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231 {"dns" , DHCP_IPLIST | 0x06, NULL, 0}, |
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232 {"wins" , DHCP_IPLIST | 0x2c, NULL, 0}, |
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233 {"nissrv" , DHCP_IPLIST | 0x29, NULL, 0}, |
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234 {"ntpsrv" , DHCP_IPLIST | 0x2a, NULL, 0}, |
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235 {"lprsrv" , DHCP_IPLIST | 0x09, NULL, 0}, |
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236 {"swapsrv" , DHCP_IP | 0x10, NULL, 0}, |
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237 {"routes" , DHCP_STCRTS | 0x21, NULL, 0}, |
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238 {"staticroutes" , DHCP_STCRTS | 0x79, NULL, 0}, |
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239 {"msstaticroutes" , DHCP_STCRTS | 0xf9, NULL, 0}, |
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parents:
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|
240 }; |
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241 |
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Rob Landley <rob@landley.net>
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|
242 static struct sock_filter filter_instr[] = { |
03f72b57a092
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|
243 BPF_STMT(BPF_LD|BPF_B|BPF_ABS, 9), |
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244 BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, IPPROTO_UDP, 0, 6), |
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245 BPF_STMT(BPF_LD|BPF_H|BPF_ABS, 6), |
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246 BPF_JUMP(BPF_JMP|BPF_JSET|BPF_K, 0x1fff, 4, 0), |
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247 BPF_STMT(BPF_LDX|BPF_B|BPF_MSH, 0), BPF_STMT(BPF_LD|BPF_H|BPF_IND, 2), |
03f72b57a092
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|
248 BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, 68, 0, 1), |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
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249 BPF_STMT(BPF_RET|BPF_K, 0xffffffff), BPF_STMT(BPF_RET|BPF_K, 0), |
03f72b57a092
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parents:
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250 }; |
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DHCP client and server, from Ashwini Sharma.
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251 |
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252 static struct sock_fprog filter_prog = { |
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253 .len = ARRAY_LEN(filter_instr), |
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254 .filter = (struct sock_filter *) filter_instr, |
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255 }; |
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256 |
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257 // calculate options size. |
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258 static int dhcp_opt_size(uint8_t *optionptr) |
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259 { |
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260 int i = 0; |
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261 for(;optionptr[i] != 0xff; i++) if(optionptr[i] != 0x00) i += optionptr[i + 1] + 2 -1; |
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262 return i; |
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DHCP client and server, from Ashwini Sharma.
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263 } |
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264 |
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265 // calculates checksum for dhcp messages. |
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266 static uint16_t dhcp_checksum(void *addr, int count) |
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267 { |
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268 int32_t sum = 0; |
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269 uint16_t tmp = 0, *source = (uint16_t *)addr; |
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270 |
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271 while (count > 1) { |
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272 sum += *source++; |
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273 count -= 2; |
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274 } |
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275 if (count > 0) { |
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276 *(uint8_t*)&tmp = *(uint8_t*)source; |
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277 sum += tmp; |
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278 } |
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DHCP client and server, from Ashwini Sharma.
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279 while (sum >> 16) sum = (sum & 0xffff) + (sum >> 16); |
03f72b57a092
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280 return ~sum; |
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281 } |
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282 |
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283 // gets information of INTERFACE and updates IFINDEX, MAC and IP |
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284 static int get_interface( char *interface, int *ifindex, uint32_t *oip, uint8_t *mac) |
03f72b57a092
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285 { |
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286 struct ifreq req; |
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287 struct sockaddr_in *ip; |
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288 int fd = xsocket(AF_INET, SOCK_RAW, IPPROTO_RAW); |
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289 |
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290 req.ifr_addr.sa_family = AF_INET; |
1639
856b544f8fce
strncpy(optptr, hname, strlen(hname)) is really just strcpy().
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parents:
1396
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291 xstrncpy(req.ifr_name, interface, IFNAMSIZ); |
1005
03f72b57a092
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292 req.ifr_name[IFNAMSIZ-1] = '\0'; |
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293 |
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294 xioctl(fd, SIOCGIFFLAGS, &req); |
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295 if (!(req.ifr_flags & IFF_UP)) return -1; |
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296 |
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DHCP client and server, from Ashwini Sharma.
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297 if (oip) { |
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298 xioctl(fd, SIOCGIFADDR, &req); |
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299 ip = (struct sockaddr_in*) &req.ifr_addr; |
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300 dbg("IP %s\n", inet_ntoa(ip->sin_addr)); |
03f72b57a092
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301 *oip = ntohl(ip->sin_addr.s_addr); |
03f72b57a092
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302 } |
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303 if (ifindex) { |
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304 xioctl(fd, SIOCGIFINDEX, &req); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
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305 dbg("Adapter index %d\n", req.ifr_ifindex); |
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306 *ifindex = req.ifr_ifindex; |
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parents:
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307 } |
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DHCP client and server, from Ashwini Sharma.
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parents:
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308 if (mac) { |
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309 xioctl(fd, SIOCGIFHWADDR, &req); |
03f72b57a092
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310 memcpy(mac, req.ifr_hwaddr.sa_data, 6); |
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311 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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312 } |
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parents:
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313 close(fd); |
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parents:
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314 return 0; |
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DHCP client and server, from Ashwini Sharma.
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parents:
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|
315 } |
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316 |
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parents:
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317 /* |
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318 *logs messeges to syslog or console |
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319 *opening the log is still left with applet. |
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320 *FIXME: move to more relevent lib. probably libc.c |
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parents:
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321 */ |
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322 static void infomsg(uint8_t infomode, char *s, ...) |
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323 { |
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324 int used; |
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325 char *msg; |
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326 va_list p, t; |
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parents:
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|
327 |
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328 if (infomode == LOG_SILENT) return; |
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329 va_start(p, s); |
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|
330 va_copy(t, p); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
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331 used = vsnprintf(NULL, 0, s, t); |
03f72b57a092
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parents:
diff
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|
332 used++; |
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parents:
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333 va_end(t); |
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parents:
diff
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|
334 |
03f72b57a092
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parents:
diff
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|
335 msg = xmalloc(used); |
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parents:
diff
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|
336 vsnprintf(msg, used, s, p); |
03f72b57a092
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parents:
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337 va_end(p); |
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parents:
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|
338 |
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DHCP client and server, from Ashwini Sharma.
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339 if (infomode & LOG_SYSTEM) syslog(LOG_INFO, "%s", msg); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
diff
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340 if (infomode & LOG_CONSOLE) printf("%s\n", msg); |
03f72b57a092
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parents:
diff
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|
341 free(msg); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
342 } |
03f72b57a092
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parents:
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|
343 |
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344 /* |
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345 * Writes self PID in file PATH |
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346 * FIXME: libc implementation only writes in /var/run |
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parents:
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|
347 * this is more generic as some implemenation may provide |
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parents:
diff
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|
348 * arguments to write in specific file. as dhcpd does. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
diff
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|
349 */ |
03f72b57a092
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Rob Landley <rob@landley.net>
parents:
diff
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|
350 static void write_pid(char *path) |
03f72b57a092
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parents:
diff
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|
351 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
352 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
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|
353 if (pidfile > 0) { |
1041
d3f9e55e350a
Convert dhcp/dhcpd from utoa() to sprintf().
Rob Landley <rob@landley.net>
parents:
1005
diff
changeset
|
354 char pidbuf[12]; |
d3f9e55e350a
Convert dhcp/dhcpd from utoa() to sprintf().
Rob Landley <rob@landley.net>
parents:
1005
diff
changeset
|
355 |
d3f9e55e350a
Convert dhcp/dhcpd from utoa() to sprintf().
Rob Landley <rob@landley.net>
parents:
1005
diff
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|
356 sprintf(pidbuf, "%u", (unsigned)getpid()); |
1005
03f72b57a092
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parents:
diff
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|
357 write(pidfile, pidbuf, strlen(pidbuf)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
diff
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|
358 close(pidfile); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
359 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
360 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
361 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
362 // String STR to UINT32 conversion strored in VAR |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
diff
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|
363 static long strtou32( char *str) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
364 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
diff
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|
365 char *endptr = NULL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
366 int base = 10; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
367 errno=0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
368 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
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|
369 base = 16; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
370 str+=2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
371 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
372 long ret_val = strtol(str, &endptr, base); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
373 if (errno) return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
374 else if (endptr && (*endptr!='\0'||endptr == str)) return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
375 return ret_val; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
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 // IP String STR to binary data. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
379 static int striptovar( char *str, void *var) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
380 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
381 in_addr_t addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
382 if(!str) error_exit("NULL address string."); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
383 addr = inet_addr(str); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
384 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
|
385 *((uint32_t*)(var)) = (uint32_t)addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
386 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
387 } |
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 // String to dhcp option conversion |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
390 static int strtoopt( char *str, uint8_t optonly) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
391 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
392 char *option, *valstr, *grp, *tp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
393 long optcode = 0, convtmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
394 uint16_t flag = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
395 uint32_t mask, nip, router; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
396 int count, size = ARRAY_LEN(options_list); |
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 if (!*str) return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
399 option = strtok((char*)str, ":"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
400 if (!option) return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
401 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
402 dbg("-x option : %s ", option); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
403 optcode = strtou32(option); |
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 if (optcode > 0 && optcode < 256) { // raw option |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
406 for (count = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
407 if ((options_list[count].code & 0X00FF) == optcode) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
408 flag = (options_list[count].code & 0XFF00); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
409 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
410 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
411 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
412 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
|
413 } else { // string option |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
414 for (count = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
415 if (!strcmp(options_list[count].key, option)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
416 flag = (options_list[count].code & 0XFF00); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
417 optcode = (options_list[count].code & 0X00FF); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
418 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
419 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
420 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
421 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
|
422 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
423 if (!flag || !optcode) return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
424 if (optonly) return optcode; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
425 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
426 valstr = strtok(NULL, "\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
427 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
|
428 dbg(" value : %-20s \n ", valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
429 switch (flag) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
430 case DHCP_NUM32: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
431 options_list[count].len = sizeof(uint32_t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
432 options_list[count].val = xmalloc(sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
433 convtmp = strtou32(valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
434 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
|
435 convtmp = htonl(convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
436 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
|
437 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
438 case DHCP_NUM16: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
439 options_list[count].len = sizeof(uint16_t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
440 options_list[count].val = xmalloc(sizeof(uint16_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
441 convtmp = strtou32(valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
442 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
|
443 convtmp = htons(convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
444 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
|
445 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
446 case DHCP_NUM8: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
447 options_list[count].len = sizeof(uint8_t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
448 options_list[count].val = xmalloc(sizeof(uint8_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
449 convtmp = strtou32(valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
450 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
|
451 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
|
452 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
453 case DHCP_IP: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
454 options_list[count].len = sizeof(uint32_t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
455 options_list[count].val = xmalloc(sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
456 striptovar(valstr, options_list[count].val); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
457 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
458 case DHCP_STRING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
459 options_list[count].len = strlen(valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
460 options_list[count].val = strdup(valstr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
461 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
462 case DHCP_IPLIST: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
463 while(valstr){ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
464 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
|
465 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
|
466 options_list[count].len += sizeof(uint32_t); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
467 valstr = strtok(NULL," \t"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
468 } |
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_STRLST: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
471 case DHCP_IPPLST: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
472 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
473 case DHCP_STCRTS: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
474 /* Option binary format: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
475 * mask [one byte, 0..32] |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
476 * ip [0..4 bytes depending on mask] |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
477 * router [4 bytes] |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
478 * may be repeated |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
479 * 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
|
480 */ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
481 grp = strtok(valstr, ",");; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
482 while(grp){ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
483 while(*grp == ' ' || *grp == '\t') grp++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
484 tp = strchr(grp, '/'); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
485 if (!tp) error_exit("malformed static route option"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
486 *tp = '\0'; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
487 mask = strtol(++tp, &tp, 10); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
488 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
|
489 while(*tp == ' ' || *tp == '\t' || *tp == '-') tp++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
490 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
|
491 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
|
492 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
|
493 options_list[count].len += 1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
494 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
|
495 options_list[count].len += mask/8; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
496 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
|
497 options_list[count].len += 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
498 tp = NULL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
499 grp = strtok(NULL, ","); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
500 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
501 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
502 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
503 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
504 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
505 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
506 // 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
|
507 static int fill_envp(dhcpc_result_t *res) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
508 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
509 struct in_addr temp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
510 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
|
511 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
512 ret = setenv("interface", state->iface, 1); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
513 if (!res) return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
514 if (res->ipaddr.s_addr) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
515 temp.s_addr = htonl(res->ipaddr.s_addr); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
516 ret = setenv("ip", inet_ntoa(temp), 1); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
517 if (ret) return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
518 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
519 if (msgopt_list) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
520 for (count = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
521 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
|
522 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
|
523 if (ret) return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
524 } |
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 return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
527 } |
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 // Executes Script NAME. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
530 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
|
531 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
532 volatile int error = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
533 pid_t pid; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
534 char *argv[3]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
535 struct stat sts; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
536 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
|
537 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
538 if (stat(script, &sts) == -1 && errno == ENOENT) return; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
539 if (fill_envp(res)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
540 dbg("Failed to create environment variables."); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
541 return; |
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 dbg("Executing %s %s\n", script, name); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
544 argv[0] = (char*) script; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
545 argv[1] = (char*) name; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
546 argv[2] = NULL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
547 fflush(NULL); |
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 pid = vfork(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
550 if (pid < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
551 dbg("Fork failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
552 return; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
553 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
554 if (!pid) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
555 execvp(argv[0], argv); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
556 error = errno; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
557 _exit(111); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
558 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
559 if (error) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
560 waitpid(pid, NULL,0); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
561 errno = error; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
562 perror_msg("script exec failed"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
563 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
564 dbg("script complete.\n"); |
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 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
567 // returns a randome ID |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
568 static uint32_t getxid(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
569 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
570 uint32_t randnum; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
571 int fd = xopen("/dev/urandom", O_RDONLY); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
572 xreadall(fd, &randnum, sizeof(randnum)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
573 xclose(fd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
574 return randnum; |
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 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
577 // opens socket in raw mode. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
578 static int mode_raw(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
579 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
580 state->mode = MODE_OFF; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
581 struct sockaddr_ll sock; |
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 if (state->sockfd > 0) close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
584 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
|
585 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
586 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
|
587 if (state->sockfd < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
588 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
|
589 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
590 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
591 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
|
592 memset(&sock, 0, sizeof(sock)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
593 sock.sll_family = AF_PACKET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
594 sock.sll_protocol = htons(ETH_P_IP); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
595 sock.sll_ifindex = state->ifindex; |
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 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
|
598 dbg("MODE RAW : bind fail.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
599 close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
600 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
601 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
602 state->mode = MODE_RAW; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
603 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
|
604 dbg("MODE RAW : filter attach fail.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
605 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
606 dbg("MODE RAW : success\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
607 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
608 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
609 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
610 // opens UDP socket |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
611 static int mode_app(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
612 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
613 struct sockaddr_in addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
614 struct ifreq ifr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
615 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
616 state->mode = MODE_OFF; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
617 if (state->sockfd > 0) close(state->sockfd); |
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 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
|
620 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
|
621 if (state->sockfd < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
622 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
|
623 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
624 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
625 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
|
626 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
|
627 dbg("MODE APP : brodcast failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
628 close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
629 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
630 } |
1639
856b544f8fce
strncpy(optptr, hname, strlen(hname)) is really just strcpy().
Rob Landley <rob@landley.net>
parents:
1396
diff
changeset
|
631 xstrncpy(ifr.ifr_name, state->iface, IFNAMSIZ); |
1005
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
632 ifr.ifr_name[IFNAMSIZ -1] = '\0'; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
633 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
|
634 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
635 memset(&addr, 0, sizeof(addr)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
636 addr.sin_family = AF_INET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
637 addr.sin_port = htons(DHCPC_CLIENT_PORT); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
638 addr.sin_addr.s_addr = INADDR_ANY ; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
639 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
640 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
|
641 close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
642 dbg("MODE APP : bind failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
643 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
644 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
645 state->mode = MODE_APP; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
646 dbg("MODE APP : success\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
647 return 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
648 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
649 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
650 static int read_raw(void) |
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 dhcp_raw_t packet; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
653 uint16_t check; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
654 int bytes = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
655 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
656 memset(&packet, 0, sizeof(packet)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
657 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
|
658 dbg("\tPacket read error, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
659 return bytes; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
660 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
661 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
|
662 dbg("\tPacket is too short, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
663 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
664 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
665 if (bytes < ntohs(packet.iph.tot_len)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
666 dbg("\tOversized packet, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
667 return -2; |
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 // ignore any extra garbage bytes |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
670 bytes = ntohs(packet.iph.tot_len); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
671 // 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
|
672 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
|
673 || packet.iph.ihl != (sizeof(packet.iph) >> 2) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
674 || packet.udph.dest != htons(DHCPC_CLIENT_PORT) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
675 || 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
|
676 dbg("\tUnrelated/bogus packet, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
677 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
678 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
679 // verify IP checksum |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
680 check = packet.iph.check; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
681 packet.iph.check = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
682 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
|
683 dbg("\tBad IP header checksum, 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 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
|
687 packet.iph.tot_len = packet.udph.len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
688 check = packet.udph.check; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
689 packet.udph.check = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
690 if (check && check != dhcp_checksum(&packet, bytes)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
691 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
|
692 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
693 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
694 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
|
695 if (state->pdhcp.cookie != htonl(DHCP_MAGIC)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
696 dbg("\tPacket with bad magic, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
697 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
698 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
699 return bytes - sizeof(packet.iph) - sizeof(packet.udph); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
700 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
701 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
702 static int read_app(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
703 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
704 int ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
705 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
706 memset(&state->pdhcp, 0, sizeof(dhcp_msg_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
707 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
|
708 dbg("Packet read error, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
709 return ret; /* returns -1 */ |
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 if (state->pdhcp.cookie != htonl(DHCP_MAGIC)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
712 dbg("Packet with bad magic, ignoring\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
713 return -2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
714 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
715 return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
716 } |
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 // Sends data through raw socket. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
719 static int send_raw(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 struct sockaddr_ll dest_sll; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
722 dhcp_raw_t packet; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
723 unsigned padding; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
724 int fd, result = -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
725 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
726 memset(&packet, 0, sizeof(dhcp_raw_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
727 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
|
728 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
729 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
|
730 dbg("SEND RAW: socket failed\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
731 return result; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
732 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
733 memset(&dest_sll, 0, sizeof(dest_sll)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
734 dest_sll.sll_family = AF_PACKET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
735 dest_sll.sll_protocol = htons(ETH_P_IP); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
736 dest_sll.sll_ifindex = state->ifindex; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
737 dest_sll.sll_halen = 6; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
738 memcpy(dest_sll.sll_addr, bmacaddr , 6); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
739 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
740 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
|
741 dbg("SEND RAW: bind failed\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
742 close(fd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
743 return result; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
744 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
745 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
|
746 packet.iph.protocol = IPPROTO_UDP; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
747 packet.iph.saddr = INADDR_ANY; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
748 packet.iph.daddr = INADDR_BROADCAST; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
749 packet.udph.source = htons(DHCPC_CLIENT_PORT); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
750 packet.udph.dest = htons(DHCPC_SERVER_PORT); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
751 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
|
752 packet.iph.tot_len = packet.udph.len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
753 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
|
754 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
|
755 packet.iph.ihl = sizeof(packet.iph) >> 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
756 packet.iph.version = IPVERSION; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
757 packet.iph.ttl = IPDEFTTL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
758 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
|
759 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
760 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
|
761 (struct sockaddr *) &dest_sll, sizeof(dest_sll)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
762 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
763 close(fd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
764 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
|
765 return result; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
766 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
767 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
768 // Sends data through UDP socket. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
769 static int send_app(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
770 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
771 struct sockaddr_in cli; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
772 int fd, ret = -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
773 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
774 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
|
775 dbg("SEND APP: sock failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
776 return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
777 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
778 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
|
779 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
780 memset(&cli, 0, sizeof(cli)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
781 cli.sin_family = AF_INET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
782 cli.sin_port = htons(DHCPC_CLIENT_PORT); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
783 cli.sin_addr.s_addr = state->pdhcp.ciaddr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
784 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
|
785 dbg("SEND APP: bind failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
786 goto error_fd; |
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 memset(&cli, 0, sizeof(cli)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
789 cli.sin_family = AF_INET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
790 cli.sin_port = htons(DHCPC_SERVER_PORT); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
791 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
|
792 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
|
793 dbg("SEND APP: connect failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
794 goto error_fd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
795 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
796 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
|
797 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
|
798 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
|
799 goto error_fd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
800 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
801 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
|
802 error_fd: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
803 close(fd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
804 return ret; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
805 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
806 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
807 // 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
|
808 static void signal_handler(int sig) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
809 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
810 unsigned char ch = sig; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
811 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
|
812 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
813 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
814 // signal setup for SIGUSR1 SIGUSR2 SIGTERM |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
815 static int setup_signal() |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
816 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
817 if (pipe((int *)&sigfd) < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
818 dbg("signal pipe failed\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
819 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
820 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
821 fcntl(sigfd.wr , F_SETFD, FD_CLOEXEC); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
822 fcntl(sigfd.rd , F_SETFD, FD_CLOEXEC); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
823 int flags = fcntl(sigfd.wr, F_GETFL); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
824 fcntl(sigfd.wr, F_SETFL, flags | O_NONBLOCK); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
825 signal(SIGUSR1, signal_handler); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
826 signal(SIGUSR2, signal_handler); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
827 signal(SIGTERM, signal_handler); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
828 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
829 return 0; |
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 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
832 // adds client id to dhcp packet |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
833 static uint8_t *dhcpc_addclientid(uint8_t *optptr) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
834 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
835 *optptr++ = DHCP_OPTION_CLIENTID; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
836 *optptr++ = 7; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
837 *optptr++ = 1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
838 memcpy(optptr, &state->macaddr, 6); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
839 return optptr + 6; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
840 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
841 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
842 // adds messege type to dhcp packet |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
843 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
|
844 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
845 *optptr++ = DHCP_OPTION_MSG_TYPE; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
846 *optptr++ = 1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
847 *optptr++ = type; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
848 return optptr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
849 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
850 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
851 // adds max size to dhcp packet |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
852 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
|
853 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
854 *optptr++ = DHCP_OPTION_MAX_SIZE; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
855 *optptr++ = 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
856 memcpy(optptr, &size, 2); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
857 return optptr + 2; |
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 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
860 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
|
861 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
862 *optptr++ = opcode; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
863 *optptr++ = len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
864 memcpy(optptr, str, len); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
865 return optptr + len; |
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 server id to dhcp packet. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
869 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
|
870 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
871 *optptr++ = DHCP_OPTION_SERVER_ID; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
872 *optptr++ = 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
873 memcpy(optptr, &serverid->s_addr, 4); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
874 return optptr + 4; |
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 // adds requested ip address to dhcp packet. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
878 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
|
879 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
880 *optptr++ = DHCP_OPTION_REQ_IPADDR; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
881 *optptr++ = 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
882 memcpy(optptr, &ipaddr->s_addr, 4); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
883 return optptr + 4; |
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 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
886 // adds hostname to dhcp packet. |
1639
856b544f8fce
strncpy(optptr, hname, strlen(hname)) is really just strcpy().
Rob Landley <rob@landley.net>
parents:
1396
diff
changeset
|
887 static uint8_t *dhcpc_addfdnname(uint8_t *optptr, char *hname) |
1005
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
888 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
889 int size = strlen(hname); |
1639
856b544f8fce
strncpy(optptr, hname, strlen(hname)) is really just strcpy().
Rob Landley <rob@landley.net>
parents:
1396
diff
changeset
|
890 |
1005
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
891 *optptr++ = DHCP_OPTION_FQDN; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
892 *optptr++ = size + 3; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
893 *optptr++ = 0x1; //flags |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
894 optptr += 2; // two blank bytes |
1639
856b544f8fce
strncpy(optptr, hname, strlen(hname)) is really just strcpy().
Rob Landley <rob@landley.net>
parents:
1396
diff
changeset
|
895 strcpy((char*)optptr, hname); // name |
856b544f8fce
strncpy(optptr, hname, strlen(hname)) is really just strcpy().
Rob Landley <rob@landley.net>
parents:
1396
diff
changeset
|
896 |
1005
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
897 return optptr + size; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
898 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
899 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
900 // 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
|
901 static uint8_t *dhcpc_addreqoptions(uint8_t *optptr) |
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 uint8_t *len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
904 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
905 *optptr++ = DHCP_OPTION_REQ_LIST; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
906 len = optptr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
907 *len = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
908 optptr++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
909 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
910 if (!flag_chk(FLAG_o)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
911 *len = 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
912 *optptr++ = DHCP_OPTION_SUBNET_MASK; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
913 *optptr++ = DHCP_OPTION_ROUTER; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
914 *optptr++ = DHCP_OPTION_DNS_SERVER; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
915 *optptr++ = DHCP_OPTION_BROADCAST; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
916 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
917 if (flag_chk(FLAG_O)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
918 memcpy(optptr++, raw_opt, raw_optcount); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
919 *len += raw_optcount; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
920 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
921 return optptr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
922 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
923 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
924 static uint8_t *dhcpc_addend(uint8_t *optptr) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
925 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
926 *optptr++ = DHCP_OPTION_END; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
927 return optptr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
928 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
929 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
930 // 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
|
931 static uint8_t* set_xopt(uint8_t *optptr) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
932 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
933 int count; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
934 int size = ARRAY_LEN(options_list); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
935 for (count = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
936 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
|
937 *optptr++ = (uint8_t) (options_list[count].code & 0x00FF); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
938 *optptr++ = (uint8_t) options_list[count].len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
939 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
|
940 optptr += options_list[count].len; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
941 } |
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 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
|
946 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
947 uint32_t var = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
948 while (*opt != DHCP_OPTION_SERVER_ID) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
949 if (*opt == DHCP_OPTION_END) return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
950 opt += opt[1] + 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
951 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
952 memcpy(&var, opt+2, sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
953 state->serverid.s_addr = var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
954 presult->serverid.s_addr = state->serverid.s_addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
955 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
|
956 return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
957 } |
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 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
|
960 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
961 uint32_t var = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
962 while (*opt != DHCP_OPTION_MSG_TYPE) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
963 if (*opt == DHCP_OPTION_END) return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
964 opt += opt[1] + 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
965 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
966 memcpy(&var, opt+2, sizeof(uint8_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
967 return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
968 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
969 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
970 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
|
971 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
972 uint32_t var = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
973 while (*opt != DHCP_OPTION_LEASE_TIME) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
974 if (*opt == DHCP_OPTION_END) return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
975 opt += opt[1] + 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
976 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
977 memcpy(&var, opt+2, sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
978 var = htonl(var); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
979 presult->lease_time = var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
980 return var; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
981 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
982 |
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 // sends dhcp msg of MSGTYPE |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
985 static int dhcpc_sendmsg(int msgtype) |
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 uint8_t *pend; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
988 struct in_addr rqsd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
989 char *vendor; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
990 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
991 // Create the common message header settings |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
992 memset(&state->pdhcp, 0, sizeof(dhcp_msg_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
993 state->pdhcp.op = DHCP_REQUEST; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
994 state->pdhcp.htype = DHCP_HTYPE_ETHERNET; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
995 state->pdhcp.hlen = 6; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
996 state->pdhcp.xid = xid; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
997 memcpy(state->pdhcp.chaddr, state->macaddr, 6); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
998 memset(&state->pdhcp.chaddr[6], 0, 10); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
999 state->pdhcp.cookie = htonl(DHCP_MAGIC);; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1000 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1001 // Add the common header options |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1002 pend = state->pdhcp.options; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1003 pend = dhcpc_addmsgtype(pend, msgtype); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1004 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1005 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
|
1006 // Handle the message specific settings |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1007 switch (msgtype) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1008 case DHCPDISCOVER: // Broadcast DISCOVER message to all servers |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1009 state->pdhcp.flags = htons(BOOTP_BROADCAST); // Broadcast bit. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1010 if (flag_chk(FLAG_r)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1011 inet_aton(TT.req_ip, &rqsd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1012 pend = dhcpc_addreqipaddr(&rqsd, pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1013 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1014 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
|
1015 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
|
1016 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
|
1017 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
|
1018 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
|
1019 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
|
1020 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
|
1021 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1022 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
|
1023 state->pdhcp.flags = htons(BOOTP_BROADCAST); // Broadcast bit. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1024 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
|
1025 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
|
1026 rqsd.s_addr = htonl(server); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1027 pend = dhcpc_addserverid(&rqsd, pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1028 pend = dhcpc_addreqipaddr(&state->ipaddr, pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1029 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
|
1030 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
|
1031 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
|
1032 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
|
1033 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
|
1034 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
|
1035 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1036 case DHCPRELEASE: // Send RELEASE message to the server. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1037 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
|
1038 rqsd.s_addr = htonl(server); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1039 pend = dhcpc_addserverid(&rqsd, pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1040 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1041 default: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1042 return -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1043 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1044 pend = dhcpc_addend(pend); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1045 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1046 if (state->mode == MODE_APP) return send_app(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1047 return send_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1048 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1049 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1050 /* |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1051 * 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
|
1052 * stores result in PRESULT or MSGOPT_LIST |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1053 */ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1054 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
|
1055 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1056 uint8_t type = 0, *options, overloaded = 0;; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1057 uint16_t flag = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1058 uint32_t convtmp = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1059 char *dest, *pfx; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1060 struct in_addr addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1061 int count, optlen, size = ARRAY_LEN(options_list); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1062 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1063 if (flag_chk(FLAG_x)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1064 if(msgopt_list){ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1065 for (count = 0; count < size; count++){ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1066 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
|
1067 msgopt_list[count].val = NULL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1068 msgopt_list[count].len = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1069 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1070 } else { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1071 msgopt_list = xmalloc(sizeof(options_list)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1072 memcpy(msgopt_list, options_list, sizeof(options_list)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1073 for (count = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1074 msgopt_list[count].len = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1075 msgopt_list[count].val = NULL; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1076 } |
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 } else { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1079 msgopt_list = options_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 msgopt_list[count].len = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1082 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
|
1083 msgopt_list[count].val = NULL; |
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 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1086 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1087 while (*optptr != DHCP_OPTION_END) { |
1294
88abd5b68a17
dhcp client had a segfault, when DHCP message contained 'pad' option.
Ashwini Sharma <ak.ashwini1981@gmail.com>
parents:
1104
diff
changeset
|
1088 if (*optptr == DHCP_OPTION_PADDING) { |
88abd5b68a17
dhcp client had a segfault, when DHCP message contained 'pad' option.
Ashwini Sharma <ak.ashwini1981@gmail.com>
parents:
1104
diff
changeset
|
1089 optptr++; |
88abd5b68a17
dhcp client had a segfault, when DHCP message contained 'pad' option.
Ashwini Sharma <ak.ashwini1981@gmail.com>
parents:
1104
diff
changeset
|
1090 continue; |
88abd5b68a17
dhcp client had a segfault, when DHCP message contained 'pad' option.
Ashwini Sharma <ak.ashwini1981@gmail.com>
parents:
1104
diff
changeset
|
1091 } |
1005
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1092 if (*optptr == DHCP_OPTION_OVERLOAD) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1093 overloaded = optptr[2]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1094 optptr += optptr[1] + 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1095 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1096 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1097 for (count = 0, flag = 0; count < size; count++) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1098 if ((msgopt_list[count].code & 0X00FF) == *optptr) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1099 flag = (msgopt_list[count].code & 0XFF00); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1100 break; |
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 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1103 switch (flag) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1104 case DHCP_NUM32: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1105 memcpy(&convtmp, &optptr[2], sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1106 convtmp = htonl(convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1107 sprintf(toybuf, "%u", convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1108 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1109 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1110 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1111 case DHCP_NUM16: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1112 memcpy(&convtmp, &optptr[2], sizeof(uint16_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1113 convtmp = htons(convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1114 sprintf(toybuf, "%u", convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1115 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1116 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1117 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1118 case DHCP_NUM8: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1119 memcpy(&convtmp, &optptr[2], sizeof(uint8_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1120 sprintf(toybuf, "%u", convtmp); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1121 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1122 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1123 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1124 case DHCP_IP: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1125 memcpy(&convtmp, &optptr[2], sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1126 addr.s_addr = convtmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1127 sprintf(toybuf, "%s", inet_ntoa(addr)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1128 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1129 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1130 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1131 case DHCP_STRING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1132 sprintf(toybuf, "%.*s", optptr[1], &optptr[2]); |
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_IPLIST: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1137 optlen = optptr[1]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1138 dest = toybuf; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1139 while (optlen) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1140 memcpy(&convtmp, &optptr[2], sizeof(uint32_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1141 addr.s_addr = convtmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1142 dest += sprintf(dest, "%s ", inet_ntoa(addr)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1143 optlen -= 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1144 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1145 *(dest - 1) = '\0'; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1146 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1147 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1148 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1149 case DHCP_STRLST: //FIXME: do smthing. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1150 case DHCP_IPPLST: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1151 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1152 case DHCP_STCRTS: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1153 pfx = ""; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1154 dest = toybuf; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1155 options = &optptr[2]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1156 optlen = optptr[1]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1157 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1158 while (optlen >= 1 + 4) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1159 uint32_t nip = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1160 int bytes; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1161 uint8_t *p_tmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1162 unsigned mask = *options; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1163 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1164 if (mask > 32) break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1165 optlen--; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1166 p_tmp = (void*) &nip; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1167 bytes = (mask + 7) / 8; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1168 while (--bytes >= 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1169 *p_tmp++ = *options++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1170 optlen--; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1171 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1172 if (optlen < 4) break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1173 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
|
1174 ((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
|
1175 pfx = " "; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1176 dest += sprintf(dest, "/%u ", mask); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1177 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
|
1178 options += 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1179 optlen -= 4; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1180 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1181 msgopt_list[count].val = strdup(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1182 msgopt_list[count].len = strlen(toybuf); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1183 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1184 default: break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1185 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1186 optptr += optptr[1] + 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1187 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1188 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
|
1189 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
|
1190 return type; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1191 } |
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 // 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
|
1194 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
|
1195 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1196 if (state->pdhcp.op == DHCP_REPLY |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1197 && !memcmp(state->pdhcp.chaddr, state->macaddr, 6) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1198 && !memcmp(&state->pdhcp.xid, &xid, sizeof(xid))) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1199 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
|
1200 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
|
1201 return get_option_msgtype(state->pdhcp.options); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1202 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1203 return 0; |
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 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1206 // Sends a IP renew request. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1207 static void renew(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1208 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1209 infomsg(infomode, "Performing a DHCP renew"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1210 switch (state->status) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1211 case STATE_INIT: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1212 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1213 case STATE_BOUND: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1214 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1215 case STATE_RENEWING: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1216 case STATE_REBINDING: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1217 state->status = STATE_RENEW_REQUESTED; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1218 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1219 case STATE_RENEW_REQUESTED: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1220 run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1221 case STATE_REQUESTING: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1222 case STATE_RELEASED: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1223 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1224 state->status = STATE_INIT; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1225 break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1226 default: break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1227 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1228 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1229 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1230 // Sends a IP release request. |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1231 static void release(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1232 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1233 int len = sizeof("255.255.255.255\0"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1234 char buffer[len]; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1235 struct in_addr temp_addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1236 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1237 mode_app(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1238 // send release packet |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1239 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
|
1240 temp_addr.s_addr = htonl(server); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1241 strncpy(buffer, inet_ntoa(temp_addr), sizeof(buffer)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1242 buffer[len - 1] = '\0'; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1243 temp_addr.s_addr = state->ipaddr.s_addr; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1244 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
|
1245 dhcpc_sendmsg(DHCPRELEASE); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1246 run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1247 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1248 infomsg(infomode, "Entering released state"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1249 close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1250 state->sockfd = -1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1251 state->mode = MODE_OFF; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1252 state->status = STATE_RELEASED; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1253 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1254 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1255 static void free_option_stores(void) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1256 { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1257 int count, size = ARRAY_LEN(options_list); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1258 for (count = 0; count < size; count++) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1259 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
|
1260 if(flag_chk(FLAG_x)){ |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1261 for (count = 0; count < size; count++) |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1262 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
|
1263 free(msgopt_list); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1264 } |
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 void dhcp_main(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 struct timeval tv; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1270 int retval, bufflen = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1271 dhcpc_result_t result; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1272 uint8_t packets = 0, retries = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1273 uint32_t timeout = 0, waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1274 fd_set rfds; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1275 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1276 xid = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1277 setlinebuf(stdout); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1278 dbg = dummy; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1279 if (flag_chk(FLAG_v)) dbg = xprintf; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1280 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
|
1281 retries = flag_get(FLAG_t, TT.retries, 3); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1282 if (flag_chk(FLAG_S)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1283 openlog("UDHCPC :", LOG_PID, LOG_DAEMON); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1284 infomode |= LOG_SYSTEM; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1285 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1286 infomsg(infomode, "dhcp started"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1287 if (flag_chk(FLAG_O)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1288 while (TT.req_opt) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1289 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
|
1290 raw_optcount++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1291 TT.req_opt = TT.req_opt->next; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1292 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1293 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1294 if (flag_chk(FLAG_x)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1295 while (TT.pkt_opt) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1296 (void) strtoopt(TT.pkt_opt->arg, 0); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1297 TT.pkt_opt = TT.pkt_opt->next; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1298 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1299 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1300 memset(&result, 0, sizeof(dhcpc_result_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1301 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
|
1302 memset(state, 0, sizeof(dhcpc_state_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1303 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
|
1304 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1305 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
|
1306 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
|
1307 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1308 run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1309 setup_signal(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1310 state->status = STATE_INIT; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1311 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1312 fcntl(state->sockfd, F_SETFD, FD_CLOEXEC); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1313 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1314 for (;;) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1315 FD_ZERO(&rfds); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1316 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
|
1317 FD_SET(sigfd.rd, &rfds); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1318 tv.tv_sec = timeout - waited; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1319 tv.tv_usec = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1320 retval = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1321 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1322 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
|
1323 dbg("select wait ....\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1324 uint32_t timestmp = time(NULL); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1325 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
|
1326 if (errno == EINTR) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1327 waited += (unsigned) time(NULL) - timestmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1328 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1329 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1330 perror_exit("Error in select"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1331 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1332 if (!retval) { // Timed out |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1333 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
|
1334 error_exit("Interface lost %s\n", state->iface); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1335 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1336 switch (state->status) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1337 case STATE_INIT: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1338 if (packets < retries) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1339 if (!packets) xid = getxid(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1340 run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1341 infomsg(infomode, "Sending discover..."); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1342 dhcpc_sendmsg(DHCPDISCOVER); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1343 server = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1344 timeout = flag_get(FLAG_T, TT.timeout, 3); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1345 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1346 packets++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1347 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1348 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1349 lease_fail: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1350 run_script(NULL,"leasefail"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1351 if (flag_chk(FLAG_n)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1352 infomsg(infomode, "Lease failed. Exiting"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1353 goto ret_with_sockfd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1354 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1355 if (flag_chk(FLAG_b)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1356 infomsg(infomode, "Lease failed. Going Daemon mode"); |
1396
e0c9c5424864
Isaac Dunham spotted that dhcp was also reimplementing daemon().
Rob Landley <rob@landley.net>
parents:
1327
diff
changeset
|
1357 daemon(0, 0); |
1005
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1358 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
|
1359 toys.optflags &= ~FLAG_b; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1360 toys.optflags |= FLAG_f; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1361 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1362 timeout = flag_get(FLAG_A, TT.tryagain, 20); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1363 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1364 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1365 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1366 case STATE_REQUESTING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1367 if (packets < retries) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1368 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
|
1369 dhcpc_sendmsg(DHCPREQUEST); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1370 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
|
1371 (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
|
1372 timeout = flag_get(FLAG_T, TT.timeout, 3); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1373 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1374 packets++; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1375 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1376 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1377 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1378 state->status = STATE_INIT; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1379 goto lease_fail; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1380 case STATE_BOUND: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1381 state->status = STATE_RENEWING; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1382 dbg("Entering renew state\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1383 // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1384 case STATE_RENEW_REQUESTED: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1385 case STATE_RENEWING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1386 renew_requested: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1387 if (timeout > 60) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1388 dhcpc_sendmsg(DHCPREQUEST); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1389 timeout >>= 1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1390 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1391 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1392 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1393 dbg("Entering rebinding state\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1394 state->status = STATE_REBINDING; |
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_REBINDING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1397 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1398 if (timeout > 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1399 dhcpc_sendmsg(DHCPREQUEST); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1400 timeout >>= 1; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1401 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1402 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1403 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1404 infomsg(infomode, "Lease lost, entering INIT state"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1405 run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1406 state->status = STATE_INIT; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1407 timeout = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1408 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1409 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1410 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1411 default: break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1412 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1413 timeout = INT_MAX; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1414 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1415 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1416 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1417 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
|
1418 unsigned char sig; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1419 if (read(sigfd.rd, &sig, 1) != 1) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1420 dbg("signal read failed.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1421 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1422 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1423 switch (sig) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1424 case SIGUSR1: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1425 infomsg(infomode, "Received SIGUSR1"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1426 renew(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1427 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1428 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1429 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
|
1430 if (state->status == STATE_INIT) timeout = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1431 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1432 case SIGUSR2: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1433 infomsg(infomode, "Received SIGUSR2"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1434 release(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1435 timeout = INT_MAX; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1436 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1437 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1438 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1439 case SIGTERM: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1440 infomsg(infomode, "Received SIGTERM"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1441 if (flag_chk(FLAG_R)) release(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1442 goto ret_with_sockfd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1443 default: break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1444 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1445 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1446 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
|
1447 dbg("main sock read\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1448 uint8_t msgType; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1449 if (state->mode == MODE_RAW) bufflen = read_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1450 if (state->mode == MODE_APP) bufflen = read_app(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1451 if (bufflen < 0) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1452 if (state->mode == MODE_RAW) mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1453 if (state->mode == MODE_APP) mode_app(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1454 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1455 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1456 waited += time(NULL) - timestmp; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1457 memset(&result, 0, sizeof(dhcpc_result_t)); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1458 msgType = dhcpc_parsemsg(&result); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1459 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
|
1460 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
|
1461 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
|
1462 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
|
1463 dhcpc_parseoptions(&result, state->pdhcp.options); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1464 get_option_lease(state->pdhcp.options, &result); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1465 |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1466 switch (state->status) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1467 case STATE_INIT: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1468 if (msgType == DHCPOFFER) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1469 state->status = STATE_REQUESTING; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1470 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1471 timeout = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1472 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1473 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1474 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1475 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1476 case STATE_REQUESTING: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1477 case STATE_RENEWING: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1478 case STATE_RENEW_REQUESTED: // FALLTHROUGH |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1479 case STATE_REBINDING: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1480 if (msgType == DHCPACK) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1481 timeout = result.lease_time / 2; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1482 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
|
1483 state->status = STATE_BOUND; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1484 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
|
1485 (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
|
1486 result.lease_time, |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1487 (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
|
1488 if (flag_chk(FLAG_q)) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1489 if (flag_chk(FLAG_R)) release(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1490 goto ret_with_sockfd; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1491 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1492 toys.optflags &= ~FLAG_n; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1493 if (!flag_chk(FLAG_f)) { |
1396
e0c9c5424864
Isaac Dunham spotted that dhcp was also reimplementing daemon().
Rob Landley <rob@landley.net>
parents:
1327
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1494 daemon(0, 0); |
1005
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
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1495 toys.optflags |= FLAG_f; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
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parents:
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1496 if (flag_chk(FLAG_p)) write_pid(TT.pidfile); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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1497 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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1498 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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1499 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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1500 } else if (msgType == DHCPNAK) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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1501 dbg("NACK received.\n"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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1502 run_script(&result, "nak"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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1503 if (state->status != STATE_REQUESTING) run_script(NULL, "deconfig"); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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1504 mode_raw(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
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1505 sleep(3); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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1506 state->status = STATE_INIT; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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1507 state->ipaddr.s_addr = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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1508 server = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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1509 timeout = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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1510 packets = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
1511 waited = 0; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
1512 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
1513 continue; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
1514 default: break; |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
1515 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1516 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1517 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
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|
1518 ret_with_sockfd: |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1519 if (CFG_TOYBOX_FREE) { |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1520 free_option_stores(); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1521 if (state->sockfd > 0) close(state->sockfd); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1522 free(state); |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1523 } |
03f72b57a092
DHCP client and server, from Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff
changeset
|
1524 } |