Mercurial > hg > toybox
annotate toys/pending/netstat.c @ 1042:cbc467592b2e draft
Remove itoa/utoa, let libc do this with sprintf.
| author | Rob Landley <rob@landley.net> |
|---|---|
| date | Tue, 03 Sep 2013 08:30:47 -0500 |
| parents | 8b1814e4c987 |
| children | e11684e3bbc5 |
| rev | line source |
|---|---|
| 961 | 1 /* netstat.c - Display Linux networking subsystem. |
| 2 * | |
| 3 * Copyright 2012 Ranjan Kumar <ranjankumar.bth@gmail.com> | |
|
997
8b1814e4c987
Ashwini Sharma said that Kyungwan Han should be in the contact info for the commands he sent recently.
Rob Landley <rob@landley.net>
parents:
961
diff
changeset
|
4 * Copyright 2013 Kyungwan Han <asura321@gmail.com> |
| 961 | 5 * |
| 6 * Not in SUSv4. | |
| 7 * | |
| 8 USE_NETSTAT(NEWTOY(netstat, "pWrxwutneal", TOYFLAG_BIN)) | |
| 9 config NETSTAT | |
| 10 bool "netstat" | |
| 11 default n | |
| 12 help | |
| 13 usage: netstat [-pWrxwutneal] | |
| 14 | |
| 15 Display networking information. | |
| 16 | |
| 17 -r Display routing table. | |
| 18 -a Display all sockets (Default: Connected). | |
| 19 -l Display listening server sockets. | |
| 20 -t Display TCP sockets. | |
| 21 -u Display UDP sockets. | |
| 22 -w Display Raw sockets. | |
| 23 -x Display Unix sockets. | |
| 24 -e Display other/more information. | |
| 25 -n Don't resolve names. | |
| 26 -W Wide Display. | |
| 27 -p Display PID/Program name for sockets. | |
| 28 */ | |
| 29 | |
| 30 #define FOR_netstat | |
| 31 #include "toys.h" | |
| 32 #include "toynet.h" | |
| 33 #include <net/route.h> | |
| 34 | |
| 35 typedef union _iaddr { | |
| 36 unsigned u; | |
| 37 unsigned char b[4]; | |
| 38 } iaddr; | |
| 39 | |
| 40 typedef union _iaddr6 { | |
| 41 struct { | |
| 42 unsigned a; | |
| 43 unsigned b; | |
| 44 unsigned c; | |
| 45 unsigned d; | |
| 46 } u; | |
| 47 unsigned char b[16]; | |
| 48 } iaddr6; | |
| 49 | |
| 50 #define ADDR_LEN (INET6_ADDRSTRLEN + 1 + 5 + 1) //IPv6 addr len + : + port + '\0' | |
| 51 | |
| 52 //For unix states | |
| 53 enum { | |
| 54 SOCK_ACCEPTCON = (1 << 16), //performed a listen. | |
| 55 SOCK_WAIT_DATA = (1 << 17), //wait data to read. | |
| 56 SOCK_NO_SPACE = (1 << 18), //no space to write. | |
| 57 }; | |
| 58 | |
| 59 #define SOCK_NOT_CONNECTED 1 | |
| 60 //For PID/Progrma Name | |
| 61 #define PROGRAM_NAME "PID/Program Name" | |
| 62 #define PROGNAME_LEN 21 | |
| 63 | |
| 64 typedef struct _pidlist { | |
| 65 struct _pidlist *next; | |
| 66 long inode; | |
| 67 char name[PROGNAME_LEN]; | |
| 68 } PID_LIST; | |
| 69 PID_LIST *pid_list = NULL; | |
| 70 | |
| 71 /* | |
| 72 * Get base name from the input name. | |
| 73 */ | |
| 74 static const char *get_basename(char *name) | |
| 75 { | |
| 76 const char *c = strrchr(name, '/'); | |
| 77 if (c) return c + 1; | |
| 78 return name; | |
| 79 } | |
| 80 /* | |
| 81 * copy string from src to dest -> only number of bytes. | |
| 82 */ | |
| 83 static char *safe_strncpy(char *dst, char *src, size_t size) | |
| 84 { | |
| 85 if(!size) return dst; | |
| 86 dst[--size] = '\0'; | |
| 87 return strncpy(dst, src, size); | |
| 88 } | |
| 89 | |
| 90 /* | |
| 91 * locate character in string. | |
| 92 */ | |
| 93 static char *strchr_nul(char *s, int c) | |
| 94 { | |
| 95 while(*s != '\0' && *s != c) s++; | |
| 96 return (char*)s; | |
| 97 } | |
| 98 | |
| 99 // Find out if the last character of a string matches with the given one. | |
| 100 // Don't underrun the buffer if the string length is 0. | |
| 101 static char *find_last_char(char *str, int c) | |
| 102 { | |
| 103 if (str && *str) { | |
| 104 size_t sz = strlen(str) - 1; | |
| 105 str += sz; | |
| 106 if ( (unsigned char)*str == c) return (char*)str; | |
| 107 } | |
| 108 return NULL; | |
| 109 } | |
| 110 /* | |
| 111 * Concat path and the file name. | |
| 112 */ | |
| 113 static char *append_pathandfile(char *path, char *fname) | |
| 114 { | |
| 115 char *c; | |
| 116 if (!path) path = ""; | |
| 117 c = find_last_char(path, '/'); | |
| 118 while (*fname == '/') fname++; | |
| 119 return xmsprintf("%s%s%s", path, (c)? "" : "/", fname); | |
| 120 } | |
| 121 /* | |
| 122 * Concat sub-path and the file name. | |
| 123 */ | |
| 124 static char *append_subpathandfile(char *path, char *fname) | |
| 125 { | |
| 126 #define ISDOTORDOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2]))) | |
| 127 if(!fname) return NULL; | |
| 128 if(ISDOTORDOTDOT(fname)) return NULL; | |
| 129 return append_pathandfile(path, fname); | |
| 130 #undef ISDOTORDOTDOT | |
| 131 } | |
| 132 /* | |
| 133 * used to converts string into int and validate the input str for invalid int value or out-of-range. | |
| 134 */ | |
| 135 static unsigned get_strtou(char *str, char **endp, int base) | |
| 136 { | |
| 137 unsigned long uli; | |
| 138 char *endptr; | |
| 139 | |
| 140 if (!isalnum(str[0])) { | |
| 141 errno = ERANGE; | |
| 142 return UINT_MAX; | |
| 143 } | |
| 144 errno = 0; | |
| 145 uli = strtoul(str, &endptr, base); | |
| 146 if (uli > UINT_MAX) { | |
| 147 errno = ERANGE; | |
| 148 return UINT_MAX; | |
| 149 } | |
| 150 | |
| 151 if (endp) *endp = endptr; | |
| 152 if (endptr[0]) { | |
| 153 if (isalnum(endptr[0]) || errno) { //"123abc" or out-of-range | |
| 154 errno = ERANGE; | |
| 155 return UINT_MAX; | |
| 156 } | |
| 157 errno = EINVAL; | |
| 158 } | |
| 159 return uli; | |
| 160 } | |
| 161 /* | |
| 162 * used to retrive pid name from pid list. | |
| 163 */ | |
| 164 static const char *get_pid_name(unsigned long inode) | |
| 165 { | |
| 166 PID_LIST *tmp; | |
| 167 for (tmp = pid_list; tmp; tmp = tmp->next) | |
| 168 if (tmp->inode == inode) return tmp->name; | |
| 169 return "-"; | |
| 170 } | |
| 171 /* | |
| 172 * For TCP/UDP/RAW display data. | |
| 173 */ | |
| 174 static void display_data(unsigned rport, char *label, unsigned rxq, unsigned txq, char *lip, char *rip, unsigned state, unsigned long inode) | |
| 175 { | |
|
1042
cbc467592b2e
Remove itoa/utoa, let libc do this with sprintf.
Rob Landley <rob@landley.net>
parents:
997
diff
changeset
|
176 char *ss_state = "UNKNOWN", buf[12]; |
| 961 | 177 char *state_label[] = {"", "ESTABLISHED", "SYN_SENT", "SYN_RECV", "FIN_WAIT1", "FIN_WAIT2", |
| 178 "TIME_WAIT", "CLOSE", "CLOSE_WAIT", "LAST_ACK", "LISTEN", "CLOSING", "UNKNOWN"}; | |
| 179 if (!strcmp(label, "tcp")) { | |
| 180 int sz = ARRAY_LEN(state_label); | |
| 181 if (!state || state >= sz) state = sz-1; | |
| 182 ss_state = state_label[state]; | |
| 183 } | |
| 184 else if (!strcmp(label, "udp")) { | |
| 185 if (state == 1) ss_state = state_label[state]; | |
| 186 else if (state == 7) ss_state = ""; | |
| 187 } | |
|
1042
cbc467592b2e
Remove itoa/utoa, let libc do this with sprintf.
Rob Landley <rob@landley.net>
parents:
997
diff
changeset
|
188 else if (!strcmp(label, "raw")) sprintf(ss_state = buf, "%u", state); |
| 961 | 189 |
| 190 if ( (toys.optflags & FLAG_W) && (toys.optflags & FLAG_p)) | |
| 191 xprintf("%3s %6d %6d %-51s %-51s %-12s%s\n", label, rxq, txq, lip, rip, ss_state, get_pid_name(inode)); | |
| 192 else if (toys.optflags & FLAG_W) | |
| 193 xprintf("%3s %6d %6d %-51s %-51s %-12s\n", label, rxq, txq, lip, rip, ss_state); | |
| 194 else if (toys.optflags & FLAG_p) | |
| 195 xprintf("%3s %6d %6d %-23s %-23s %-12s%s\n", label, rxq, txq, lip, rip, ss_state, get_pid_name(inode)); | |
| 196 else xprintf("%3s %6d %6d %-23s %-23s %-12s\n", label, rxq, txq, lip, rip, ss_state); | |
| 197 } | |
| 198 /* | |
| 199 * For TCP/UDP/RAW show data. | |
| 200 */ | |
| 201 static void show_data(unsigned rport, char *label, unsigned rxq, unsigned txq, char *lip, char *rip, unsigned state, unsigned long inode) | |
| 202 { | |
| 203 if (toys.optflags & FLAG_l) { | |
| 204 if (!rport && (state && 0xA)) display_data(rport, label, rxq, txq, lip, rip, state, inode); | |
| 205 } else if (toys.optflags & FLAG_a) display_data(rport, label, rxq, txq, lip, rip, state, inode); | |
| 206 //rport && (TCP | UDP | RAW) | |
| 207 else if (rport && (0x10 | 0x20 | 0x40)) display_data(rport, label, rxq, txq, lip, rip, state, inode); | |
| 208 } | |
| 209 /* | |
| 210 * used to get service name. | |
| 211 */ | |
| 212 static char *get_servname(int port, char *label) | |
| 213 { | |
| 214 int lport = htons(port); | |
| 215 if (!lport) return xmsprintf("%s", "*"); | |
| 216 struct servent *ser = getservbyport(lport, label); | |
| 217 if (ser) return xmsprintf("%s", ser->s_name); | |
|
1042
cbc467592b2e
Remove itoa/utoa, let libc do this with sprintf.
Rob Landley <rob@landley.net>
parents:
997
diff
changeset
|
218 return xmsprintf("%u", (unsigned)ntohs(lport)); |
| 961 | 219 } |
| 220 /* | |
| 221 * used to convert address into text format. | |
| 222 */ | |
| 223 static void addr2str(int af, void *addr, unsigned port, char *buf, char *label) | |
| 224 { | |
| 225 char ip[ADDR_LEN] = {0,}; | |
| 226 if (!inet_ntop(af, addr, ip, ADDR_LEN)) { | |
| 227 *buf = '\0'; | |
| 228 return; | |
| 229 } | |
| 230 size_t iplen = strlen(ip); | |
| 231 if (!port) { | |
| 232 strncat(ip+iplen, ":*", ADDR_LEN-iplen-1); | |
| 233 memcpy(buf, ip, ADDR_LEN); | |
| 234 return; | |
| 235 } | |
| 236 | |
| 237 if (!(toys.optflags & FLAG_n)) { | |
| 238 struct addrinfo hints, *result, *rp; | |
| 239 | |
| 240 memset(&hints, 0, sizeof(struct addrinfo)); | |
| 241 hints.ai_family = af; | |
| 242 | |
| 243 if (!getaddrinfo(ip, NULL, &hints, &result)) { | |
| 244 char hbuf[NI_MAXHOST] = {0,}, sbuf[NI_MAXSERV] = {0,}; | |
| 245 socklen_t sock_len; | |
| 246 char *sname = NULL; | |
| 247 int plen = 0; | |
| 248 | |
| 249 if (af == AF_INET) sock_len = sizeof(struct sockaddr_in); | |
| 250 else sock_len = sizeof(struct sockaddr_in6); | |
| 251 | |
| 252 for (rp = result; rp; rp = rp->ai_next) | |
| 253 if (!getnameinfo(rp->ai_addr, sock_len, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), NI_NUMERICSERV)) | |
| 254 break; | |
| 255 | |
| 256 freeaddrinfo(result); | |
| 257 sname = get_servname(port, label); | |
| 258 plen = strlen(sname); | |
| 259 if (*hbuf) { | |
| 260 memset(ip, 0, ADDR_LEN); | |
| 261 memcpy(ip, hbuf, (ADDR_LEN - plen - 2)); | |
| 262 iplen = strlen(ip); | |
| 263 } | |
| 264 snprintf(ip + iplen, ADDR_LEN-iplen, ":%s", sname); | |
| 265 free(sname); | |
| 266 } | |
| 267 } | |
| 268 else snprintf(ip+iplen, ADDR_LEN-iplen, ":%d", port); | |
| 269 memcpy(buf, ip, ADDR_LEN); | |
| 270 } | |
| 271 /* | |
| 272 * display ipv4 info for TCP/UDP/RAW. | |
| 273 */ | |
| 274 static void show_ipv4(char *fname, char *label) | |
| 275 { | |
| 276 FILE *fp = fopen((char *)fname, "r"); | |
| 277 if (!fp) { | |
| 278 perror_msg("'%s'", fname); | |
| 279 return; | |
| 280 } | |
| 281 fgets(toybuf, sizeof(toybuf), fp); //skip header. | |
| 282 while (fgets(toybuf, sizeof(toybuf), fp)) { | |
| 283 char lip[ADDR_LEN] = {0,}, rip[ADDR_LEN] = {0,}; | |
| 284 iaddr laddr, raddr; | |
| 285 unsigned lport, rport, state, txq, rxq, num, uid; | |
| 286 unsigned long inode; | |
| 287 | |
| 288 int nitems = sscanf(toybuf, " %d: %x:%x %x:%x %x %x:%x %*X:%*X %*X %d %*d %ld", | |
| 289 &num, &laddr.u, &lport, &raddr.u, &rport, &state, &txq, &rxq, &uid, &inode); | |
| 290 if (nitems == 10) { | |
| 291 addr2str(AF_INET, &laddr, lport, lip, label); | |
| 292 addr2str(AF_INET, &raddr, rport, rip, label); | |
| 293 show_data(rport, label, rxq, txq, lip, rip, state, inode); | |
| 294 } | |
| 295 }//End of While | |
| 296 fclose(fp); | |
| 297 } | |
| 298 /* | |
| 299 * display ipv6 info for TCP/UDP/RAW. | |
| 300 */ | |
| 301 static void show_ipv6(char *fname, char *label) | |
| 302 { | |
| 303 FILE *fp = fopen((char *)fname, "r"); | |
| 304 if (!fp) { | |
| 305 perror_msg("'%s'", fname); | |
| 306 return; | |
| 307 } | |
| 308 fgets(toybuf, sizeof(toybuf), fp); //skip header. | |
| 309 while (fgets(toybuf, sizeof(toybuf), fp)) { | |
| 310 char lip[ADDR_LEN] = {0,}, rip[ADDR_LEN] = {0,}; | |
| 311 iaddr6 laddr6, raddr6; | |
| 312 unsigned lport, rport, state, txq, rxq, num, uid; | |
| 313 unsigned long inode; | |
| 314 int nitems = sscanf(toybuf, " %d: %8x%8x%8x%8x:%x %8x%8x%8x%8x:%x %x %x:%x %*X:%*X %*X %d %*d %ld", | |
| 315 &num, &laddr6.u.a, &laddr6.u.b, &laddr6.u.c, &laddr6.u.d, &lport, &raddr6.u.a, &raddr6.u.b, | |
| 316 &raddr6.u.c, &raddr6.u.d, &rport, &state, &txq, &rxq, &uid, &inode); | |
| 317 if (nitems == 16) { | |
| 318 addr2str(AF_INET6, &laddr6, lport, lip, label); | |
| 319 addr2str(AF_INET6, &raddr6, rport, rip, label); | |
| 320 show_data(rport, label, rxq, txq, lip, rip, state, inode); | |
| 321 } | |
| 322 }//End of While | |
| 323 fclose(fp); | |
| 324 } | |
| 325 /* | |
| 326 * display unix socket info. | |
| 327 */ | |
| 328 static void show_unix_sockets(char *fname, char *label) | |
| 329 { | |
| 330 FILE *fp = fopen((char *)fname, "r"); | |
| 331 if (!fp) { | |
| 332 perror_msg("'%s'", fname); | |
| 333 return; | |
| 334 } | |
| 335 fgets(toybuf, sizeof(toybuf), fp); //skip header. | |
| 336 while (fgets(toybuf, sizeof(toybuf), fp)) { | |
| 337 unsigned long int refcount, label, flags, inode; | |
| 338 int nitems = 0, path_offset = 0, type, state; | |
| 339 char sock_flags[32] = {0,}, *sock_type, *sock_state, *bptr = toybuf; | |
| 340 | |
| 341 if (!toybuf[0]) continue; | |
| 342 nitems = sscanf(toybuf, "%*p: %lX %lX %lX %X %X %lu %n", | |
| 343 &refcount, &label, &flags, &type, &state, &inode, &path_offset); | |
| 344 //for state one less | |
| 345 if (nitems < 6) break; | |
| 346 if (toys.optflags & FLAG_l) { | |
| 347 if ( !((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) ) continue; | |
| 348 } else if (!(toys.optflags & FLAG_a)) { | |
| 349 if ((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) continue; | |
| 350 } | |
| 351 | |
| 352 //prepare socket type, state and flags. | |
| 353 { | |
| 354 char *ss_type[] = { "", "STREAM", "DGRAM", "RAW", "RDM", "SEQPACKET", "UNKNOWN"}; | |
| 355 char *ss_state[] = { "FREE", "LISTENING", "CONNECTING", "CONNECTED", "DISCONNECTING", "UNKNOWN"}; | |
| 356 | |
| 357 int sz = ARRAY_LEN(ss_type);//sizeof(ss_type)/sizeof(ss_type[0]); | |
| 358 if ( (type < SOCK_STREAM) || (type > SOCK_SEQPACKET) ) sock_type = ss_type[sz-1]; | |
| 359 else sock_type = ss_type[type]; | |
| 360 | |
| 361 sz = ARRAY_LEN(ss_state);//sizeof(ss_state)/sizeof(ss_state[0]); | |
| 362 if ((state < 0) || (state > sz-2)) sock_state = ss_state[sz-1]; | |
| 363 else if (state == SOCK_NOT_CONNECTED) { | |
| 364 if (flags & SOCK_ACCEPTCON) sock_state = ss_state[state]; | |
| 365 else sock_state = " "; | |
| 366 } else sock_state = ss_state[state]; | |
| 367 | |
| 368 strcpy(sock_flags, "[ "); | |
| 369 if (flags & SOCK_ACCEPTCON) strcat(sock_flags, "ACC "); | |
| 370 if (flags & SOCK_WAIT_DATA) strcat(sock_flags, "W "); | |
| 371 if (flags & SOCK_NO_SPACE) strcat(sock_flags, "N "); | |
| 372 strcat(sock_flags, "]"); | |
| 373 } | |
| 374 xprintf("%-5s %-6ld %-11s %-10s %-13s %6lu ", (!label ? "unix" : "??"), refcount, sock_flags, sock_type, sock_state, inode); | |
| 375 if (toys.optflags & FLAG_p) xprintf("%-20s", get_pid_name(inode)); | |
| 376 | |
| 377 bptr += path_offset; | |
| 378 *strchr_nul(bptr, '\n') = '\0'; | |
| 379 xprintf("%s\n", bptr); | |
| 380 }//End of while | |
| 381 fclose(fp); | |
| 382 } | |
| 383 /* | |
| 384 * extract inode value from the link. | |
| 385 */ | |
| 386 static long ss_inode(char *link) | |
| 387 { | |
| 388 long inode = -1; | |
| 389 //"link = socket:[12345]", get "12345" as inode. | |
| 390 if (!strncmp(link, "socket:[", sizeof("socket:[")-1)) { | |
| 391 inode = get_strtou(link + sizeof("socket:[")-1, (char**)&link, 0); | |
| 392 if (*link != ']') inode = -1; | |
| 393 } | |
| 394 //"link = [0000]:12345", get "12345" as inode. | |
| 395 else if (!strncmp(link, "[0000]:", sizeof("[0000]:")-1)) { | |
| 396 inode = get_strtou(link + sizeof("[0000]:")-1, NULL, 0); | |
| 397 //if not NULL terminated. | |
| 398 if (errno) inode = -1; | |
| 399 } | |
| 400 return inode; | |
| 401 } | |
| 402 /* | |
| 403 * add inode and progname in the pid list. | |
| 404 */ | |
| 405 static void add2list(long inode, char *progname) | |
| 406 { | |
| 407 PID_LIST *node = pid_list; | |
| 408 for(; node; node = node->next) { | |
| 409 if(node->inode == inode) | |
| 410 return; | |
| 411 } | |
| 412 PID_LIST *new = (PID_LIST *)xzalloc(sizeof(PID_LIST)); | |
| 413 new->inode = inode; | |
| 414 safe_strncpy(new->name, progname, PROGNAME_LEN-1); | |
| 415 new->next = pid_list; | |
| 416 pid_list = new; | |
| 417 } | |
| 418 /* | |
| 419 * add pid info in the list. | |
| 420 */ | |
| 421 static void extract_inode(char *path, char *progname) | |
| 422 { | |
| 423 DIR *dp; | |
| 424 struct dirent *entry; | |
| 425 | |
| 426 if (!(dp = opendir(path))) { | |
| 427 if (errno == EACCES) return; | |
| 428 else perror_exit("%s", path); | |
| 429 } | |
| 430 while ((entry = readdir(dp))) { | |
| 431 char *link = NULL, *fname = append_subpathandfile(path, entry->d_name); | |
| 432 if (!fname) continue; | |
| 433 link = xreadlink(fname); | |
| 434 if (link) { | |
| 435 long inode = ss_inode(link); | |
| 436 free(link); | |
| 437 if (inode != -1) add2list(inode, progname); | |
| 438 } | |
| 439 free(fname); | |
| 440 }//end of while. | |
| 441 closedir(dp); | |
| 442 } | |
| 443 /* | |
| 444 * prepare the list for all pids in /proc directory. | |
| 445 */ | |
| 446 static void get_pid_list(void) | |
| 447 { | |
| 448 DIR *dp; | |
| 449 struct dirent *entry; | |
| 450 char path[64] = {0,}; | |
| 451 uid_t uid = geteuid(); | |
| 452 | |
| 453 if (!(dp = opendir("/proc"))) perror_exit("opendir"); | |
| 454 | |
| 455 while ((entry = readdir(dp))) { | |
| 456 int fd, nitems = 0, length = 0; | |
| 457 char *pid, *progname; | |
| 458 | |
| 459 if (!isdigit(*entry->d_name)) continue; | |
| 460 pid = entry->d_name; | |
| 461 length = snprintf(path, sizeof(path), "/proc/%s/cmdline", entry->d_name); | |
| 462 if (sizeof(path) <= length) continue; | |
| 463 | |
| 464 fd = xopen(path, O_RDONLY); | |
| 465 nitems = readall(fd, toybuf, sizeof(toybuf) - 1); | |
| 466 xclose(fd); | |
| 467 if (nitems < 1) continue; | |
| 468 toybuf[nitems] = '\0'; | |
| 469 strcpy(path + length - (sizeof("cmdline")-1), "fd"); | |
| 470 progname = append_pathandfile(pid, (char *)get_basename(toybuf)); //e.g. progname = 2054/gnome-keyring-daemon | |
| 471 extract_inode(path, progname); | |
| 472 }//end of while. | |
| 473 closedir(dp); | |
| 474 | |
| 475 if (uid) fprintf(stderr, "(Not all processes could be identified, non-owned process info " | |
| 476 "will not be shown, you would have to be root to see it all.)\n"); | |
| 477 } | |
| 478 /* | |
| 479 * Dealloc pid list. | |
| 480 */ | |
| 481 static void clean_pid_list(void) | |
| 482 { | |
| 483 PID_LIST *tmp; | |
| 484 while (pid_list) { | |
| 485 tmp = pid_list->next; | |
| 486 free(pid_list); | |
| 487 pid_list = tmp; | |
| 488 } | |
| 489 } | |
| 490 /* | |
| 491 * For TCP/UDP/RAW show the header. | |
| 492 */ | |
| 493 static void show_header(void) | |
| 494 { | |
| 495 if ((toys.optflags & FLAG_W) && (toys.optflags & FLAG_p)) | |
| 496 xprintf("\nProto Recv-Q Send-Q %-51s %-51s %-12s%s\n", "Local Address", "Foreign Address", "State", PROGRAM_NAME); | |
| 497 else if (toys.optflags & FLAG_p) | |
| 498 xprintf("\nProto Recv-Q Send-Q %-23s %-23s %-12s%s\n", "Local Address", "Foreign Address", "State", PROGRAM_NAME); | |
| 499 else if (toys.optflags & FLAG_W) | |
| 500 xprintf("\nProto Recv-Q Send-Q %-51s %-51s State \n", "Local Address", "Foreign Address"); | |
| 501 else xprintf("\nProto Recv-Q Send-Q %-23s %-23s State \n", "Local Address", "Foreign Address"); | |
| 502 } | |
| 503 /* | |
| 504 * used to get the flag values for route command. | |
| 505 */ | |
| 506 static void get_flag_value(char **flagstr, int flags) | |
| 507 { | |
| 508 int i = 0; | |
| 509 char *str = *flagstr; | |
| 510 static const char flagchars[] = "GHRDMDAC"; | |
| 511 static const unsigned flagarray[] = { | |
| 512 RTF_GATEWAY, | |
| 513 RTF_HOST, | |
| 514 RTF_REINSTATE, | |
| 515 RTF_DYNAMIC, | |
| 516 RTF_MODIFIED, | |
| 517 RTF_DEFAULT, | |
| 518 RTF_ADDRCONF, | |
| 519 RTF_CACHE | |
| 520 }; | |
| 521 *str++ = 'U'; | |
| 522 while ( (*str = flagchars[i]) ) { | |
| 523 if (flags & flagarray[i++]) ++str; | |
| 524 } | |
| 525 } | |
| 526 /* | |
| 527 * extract inet4 route info from /proc/net/route file and display it. | |
| 528 */ | |
| 529 static void display_routes(int is_more_info, int notresolve) | |
| 530 { | |
| 531 #define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED) | |
| 532 unsigned long dest, gate, mask; | |
| 533 int flags, ref, use, metric, mss, win, irtt; | |
| 534 char iface[64]={0,}; | |
| 535 char *flag_val = xzalloc(10); //there are 9 flags "UGHRDMDAC" for route. | |
| 536 | |
| 537 FILE *fp = xfopen("/proc/net/route", "r"); | |
| 538 xprintf("Kernel IP routing table\n" | |
| 539 "Destination Gateway Genmask Flags %s Iface\n", | |
| 540 is_more_info ? " MSS Window irtt" : "Metric Ref Use"); | |
| 541 fgets(toybuf, sizeof(toybuf), fp); //skip 1st line. | |
| 542 while (fgets(toybuf, sizeof(toybuf), fp)) { | |
| 543 int nitems = 0; | |
| 544 char *destip = NULL, *gateip = NULL, *maskip = NULL; | |
| 545 memset(flag_val, 0, 10); | |
| 546 | |
| 547 nitems = sscanf(toybuf, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n", | |
| 548 iface, &dest, &gate, &flags, &ref, &use, &metric, &mask, &mss, &win, &irtt); | |
| 549 if (nitems != 11) {//EOF with no (nonspace) chars read. | |
| 550 if ((nitems < 0) && feof(fp)) break; | |
| 551 perror_exit("sscanf"); | |
| 552 } | |
| 553 //skip down interfaces. | |
| 554 if (!(flags & RTF_UP)) continue; | |
| 555 | |
| 556 if (dest) {//For Destination | |
| 557 if (inet_ntop(AF_INET, &dest, toybuf, sizeof(toybuf)) ) destip = xstrdup(toybuf); | |
| 558 } else { | |
| 559 if (!notresolve) destip = xstrdup("default"); | |
| 560 else destip = xstrdup("0.0.0.0"); | |
| 561 } | |
| 562 if (gate) {//For Gateway | |
| 563 if (inet_ntop(AF_INET, &gate, toybuf, sizeof(toybuf)) ) gateip = xstrdup(toybuf); | |
| 564 } else { | |
| 565 if (!notresolve) gateip = xstrdup("*"); | |
| 566 else gateip = xstrdup("0.0.0.0"); | |
| 567 } | |
| 568 //For Mask | |
| 569 if (inet_ntop(AF_INET, &mask, toybuf, sizeof(toybuf)) ) maskip = xstrdup(toybuf); | |
| 570 | |
| 571 //Get flag Values | |
| 572 get_flag_value(&flag_val, (flags & IPV4_MASK)); | |
| 573 if (flags & RTF_REJECT) flag_val[0] = '!'; | |
| 574 xprintf("%-15.15s %-15.15s %-16s%-6s", destip, gateip, maskip, flag_val); | |
| 575 if (destip) free(destip); | |
| 576 if (gateip) free(gateip); | |
| 577 if (maskip) free(maskip); | |
| 578 if (is_more_info) xprintf("%5d %-5d %6d %s\n", mss, win, irtt, iface); | |
| 579 else xprintf("%-6d %-2d %7d %s\n", metric, ref, use, iface); | |
| 580 }//end of while. | |
| 581 fclose(fp); | |
| 582 if (flag_val) free(flag_val); | |
| 583 #undef IPV4_MASK | |
| 584 return; | |
| 585 } | |
| 586 /* | |
| 587 * netstat utily main function. | |
| 588 */ | |
| 589 void netstat_main(void) | |
| 590 { | |
| 591 #define IS_NETSTAT_PROTO_FLAGS_UP (toys.optflags & (FLAG_t | FLAG_u | FLAG_w | FLAG_x)) | |
| 592 int flag_listen_and_all = 0; | |
| 593 if (!toys.optflags) toys.optflags = FLAG_t | FLAG_u | FLAG_w | FLAG_x; | |
| 594 | |
| 595 //When a is set | |
| 596 if (toys.optflags & FLAG_a) flag_listen_and_all = 1; | |
| 597 //when a and l both are set | |
| 598 if ( (toys.optflags & FLAG_a) && (toys.optflags & FLAG_l) ) | |
| 599 toys.optflags &= ~FLAG_l; | |
| 600 //when only a is set | |
| 601 if ( (toys.optflags & FLAG_a) && (!IS_NETSTAT_PROTO_FLAGS_UP) ) | |
| 602 toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x; | |
| 603 //when only l is set | |
| 604 if ( (toys.optflags & FLAG_l) && (!IS_NETSTAT_PROTO_FLAGS_UP) ) | |
| 605 toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x; | |
| 606 //when only e/n is set | |
| 607 if( ((toys.optflags & FLAG_e) || (toys.optflags & FLAG_n)) && (!IS_NETSTAT_PROTO_FLAGS_UP) ) | |
| 608 toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x; | |
| 609 //when W is set | |
| 610 if ( (toys.optflags & FLAG_W) && (!IS_NETSTAT_PROTO_FLAGS_UP) ) | |
| 611 toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x; | |
| 612 //when p is set | |
| 613 if ( (toys.optflags & FLAG_p) && (!IS_NETSTAT_PROTO_FLAGS_UP) ) | |
| 614 toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x; | |
| 615 | |
| 616 //Display routing table. | |
| 617 if (toys.optflags & FLAG_r) { | |
| 618 display_routes(!(toys.optflags & FLAG_e), (toys.optflags & FLAG_n)); | |
| 619 return; | |
| 620 } | |
| 621 | |
| 622 if (toys.optflags & FLAG_p) get_pid_list(); | |
| 623 | |
| 624 //For TCP/UDP/RAW. | |
| 625 if ( (toys.optflags & FLAG_t) || (toys.optflags & FLAG_u) || (toys.optflags & FLAG_w) ) { | |
| 626 xprintf("Active Internet connections "); | |
| 627 | |
| 628 if (flag_listen_and_all) xprintf("(servers and established)"); | |
| 629 else if (toys.optflags & FLAG_l) xprintf("(only servers)"); | |
| 630 else xprintf("(w/o servers)"); | |
| 631 | |
| 632 show_header(); | |
| 633 if (toys.optflags & FLAG_t) {//For TCP | |
| 634 show_ipv4("/proc/net/tcp", "tcp"); | |
| 635 show_ipv6("/proc/net/tcp6", "tcp"); | |
| 636 } | |
| 637 if (toys.optflags & FLAG_u) {//For UDP | |
| 638 show_ipv4("/proc/net/udp", "udp"); | |
| 639 show_ipv6("/proc/net/udp6", "udp"); | |
| 640 } | |
| 641 if (toys.optflags & FLAG_w) {//For raw | |
| 642 show_ipv4("/proc/net/raw", "raw"); | |
| 643 show_ipv6("/proc/net/raw6", "raw"); | |
| 644 } | |
| 645 } | |
| 646 if (toys.optflags & FLAG_x) {//For UNIX. | |
| 647 xprintf("Active UNIX domain sockets "); | |
| 648 if (flag_listen_and_all) xprintf("(servers and established)"); | |
| 649 else if (toys.optflags & FLAG_l) xprintf("(only servers)"); | |
| 650 else xprintf("(w/o servers)"); | |
| 651 | |
| 652 if (toys.optflags & FLAG_p) xprintf("\nProto RefCnt Flags Type State I-Node %s Path\n", PROGRAM_NAME); | |
| 653 else xprintf("\nProto RefCnt Flags Type State I-Node Path\n"); | |
| 654 show_unix_sockets("/proc/net/unix", "unix"); | |
| 655 } | |
| 656 if (toys.optflags & FLAG_p) clean_pid_list(); | |
| 657 if (toys.exitval) toys.exitval = 0; | |
| 658 #undef IS_NETSTAT_PROTO_FLAGS_UP | |
| 659 } |