1 /* vi: set sw=4 ts=4: */
3 * Mini netstat implementation(s) for busybox
4 * based in part on the netstat implementation from net-tools.
6 * Copyright (C) 2002 by Bart Visscher <magick@linux-fan.com>
9 * IPV6 support added by Bart Visscher <magick@linux-fan.com>
11 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
15 #include "inet_common.h"
17 #define NETSTAT_CONNECTED 0x01
18 #define NETSTAT_LISTENING 0x02
19 #define NETSTAT_NUMERIC 0x04
20 /* Must match getopt32 option string */
21 #define NETSTAT_TCP 0x10
22 #define NETSTAT_UDP 0x20
23 #define NETSTAT_RAW 0x40
24 #define NETSTAT_UNIX 0x80
25 #define NETSTAT_ALLPROTO (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX)
27 static int flags = NETSTAT_CONNECTED | NETSTAT_ALLPROTO;
40 TCP_CLOSING /* now a valid state */
43 static const char * const tcp_state[] =
60 SS_FREE = 0, /* not allocated */
61 SS_UNCONNECTED, /* unconnected to any socket */
62 SS_CONNECTING, /* in process of connecting */
63 SS_CONNECTED, /* connected to socket */
64 SS_DISCONNECTING /* in process of disconnecting */
67 #define SO_ACCEPTCON (1<<16) /* performed a listen */
68 #define SO_WAITDATA (1<<17) /* wait data to read */
69 #define SO_NOSPACE (1<<18) /* no space to write */
71 static const char *get_sname(int port, const char *proto, int num)
73 /* hummm, we return static buffer here!! */
74 const char *str = itoa(ntohs(port));
76 struct servent *se = getservbyport(port, proto);
86 static void snprint_ip_port(char *ip_port, int size, struct sockaddr *addr, int port, const char *proto, int numeric)
88 const char *port_name;
90 #if ENABLE_FEATURE_IPV6
91 if (addr->sa_family == AF_INET6) {
92 INET6_rresolve(ip_port, size, (struct sockaddr_in6 *)addr,
93 (numeric & NETSTAT_NUMERIC) ? 0x0fff : 0);
97 INET_rresolve(ip_port, size, (struct sockaddr_in *)addr,
98 0x4000 | ((numeric & NETSTAT_NUMERIC) ? 0x0fff : 0),
101 port_name = get_sname(htons(port), proto, numeric);
102 if ((strlen(ip_port) + strlen(port_name)) > 22)
103 ip_port[22 - strlen(port_name)] = '\0';
104 ip_port += strlen(ip_port);
105 strcat(ip_port, ":");
106 strcat(ip_port, port_name);
109 static void tcp_do_one(int lnr, const char *line)
111 char local_addr[64], rem_addr[64];
112 const char *state_str;
114 int num, local_port, rem_port, d, state, timer_run, uid, timeout;
115 #if ENABLE_FEATURE_IPV6
116 struct sockaddr_in6 localaddr, remaddr;
117 char addr6[INET6_ADDRSTRLEN];
120 struct sockaddr_in localaddr, remaddr;
122 unsigned long rxq, txq, time_len, retr, inode;
129 "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
130 &d, local_addr, &local_port,
131 rem_addr, &rem_port, &state,
132 &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
134 if (strlen(local_addr) > 8) {
135 #if ENABLE_FEATURE_IPV6
136 sscanf(local_addr, "%08X%08X%08X%08X",
137 &in6.s6_addr32[0], &in6.s6_addr32[1],
138 &in6.s6_addr32[2], &in6.s6_addr32[3]);
139 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
140 inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr.sin6_addr);
141 sscanf(rem_addr, "%08X%08X%08X%08X",
142 &in6.s6_addr32[0], &in6.s6_addr32[1],
143 &in6.s6_addr32[2], &in6.s6_addr32[3]);
144 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
145 inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr);
146 localaddr.sin6_family = AF_INET6;
147 remaddr.sin6_family = AF_INET6;
150 sscanf(local_addr, "%X",
151 &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
152 sscanf(rem_addr, "%X",
153 &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
154 ((struct sockaddr *) &localaddr)->sa_family = AF_INET;
155 ((struct sockaddr *) &remaddr)->sa_family = AF_INET;
159 bb_error_msg("warning, got bogus tcp line");
162 state_str = tcp_state[state];
163 if ((rem_port && (flags & NETSTAT_CONNECTED))
164 || (!rem_port && (flags & NETSTAT_LISTENING))
166 snprint_ip_port(local_addr, sizeof(local_addr),
167 (struct sockaddr *) &localaddr, local_port,
168 "tcp", flags & NETSTAT_NUMERIC);
170 snprint_ip_port(rem_addr, sizeof(rem_addr),
171 (struct sockaddr *) &remaddr, rem_port,
172 "tcp", flags & NETSTAT_NUMERIC);
174 printf("tcp %6ld %6ld %-23s %-23s %-12s\n",
175 rxq, txq, local_addr, rem_addr, state_str);
179 static void udp_do_one(int lnr, const char *line)
181 char local_addr[64], rem_addr[64];
182 const char *state_str;
184 int num, local_port, rem_port, d, state, timer_run, uid, timeout;
185 #if ENABLE_FEATURE_IPV6
186 struct sockaddr_in6 localaddr, remaddr;
187 char addr6[INET6_ADDRSTRLEN];
190 struct sockaddr_in localaddr, remaddr;
192 unsigned long rxq, txq, time_len, retr, inode;
199 "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
200 &d, local_addr, &local_port,
201 rem_addr, &rem_port, &state,
202 &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
204 if (strlen(local_addr) > 8) {
205 #if ENABLE_FEATURE_IPV6
206 /* Demangle what the kernel gives us */
207 sscanf(local_addr, "%08X%08X%08X%08X",
208 &in6.s6_addr32[0], &in6.s6_addr32[1],
209 &in6.s6_addr32[2], &in6.s6_addr32[3]);
210 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
211 inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr.sin6_addr);
212 sscanf(rem_addr, "%08X%08X%08X%08X",
213 &in6.s6_addr32[0], &in6.s6_addr32[1],
214 &in6.s6_addr32[2], &in6.s6_addr32[3]);
215 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
216 inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr);
217 localaddr.sin6_family = AF_INET6;
218 remaddr.sin6_family = AF_INET6;
221 sscanf(local_addr, "%X",
222 &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
223 sscanf(rem_addr, "%X",
224 &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
225 ((struct sockaddr *) &localaddr)->sa_family = AF_INET;
226 ((struct sockaddr *) &remaddr)->sa_family = AF_INET;
230 bb_error_msg("warning, got bogus udp line");
234 case TCP_ESTABLISHED:
235 state_str = "ESTABLISHED";
243 state_str = "UNKNOWN";
247 #if ENABLE_FEATURE_IPV6
248 # define notnull(A) (((A.sin6_family == AF_INET6) && \
249 ((A.sin6_addr.s6_addr32[0]) || \
250 (A.sin6_addr.s6_addr32[1]) || \
251 (A.sin6_addr.s6_addr32[2]) || \
252 (A.sin6_addr.s6_addr32[3]))) || \
253 ((A.sin6_family == AF_INET) && \
254 ((struct sockaddr_in *) &A)->sin_addr.s_addr))
256 # define notnull(A) (A.sin_addr.s_addr)
258 if ((notnull(remaddr) && (flags & NETSTAT_CONNECTED))
259 || (!notnull(remaddr) && (flags & NETSTAT_LISTENING))
261 snprint_ip_port(local_addr, sizeof(local_addr),
262 (struct sockaddr *) &localaddr, local_port,
263 "udp", flags & NETSTAT_NUMERIC);
265 snprint_ip_port(rem_addr, sizeof(rem_addr),
266 (struct sockaddr *) &remaddr, rem_port,
267 "udp", flags & NETSTAT_NUMERIC);
269 printf("udp %6ld %6ld %-23s %-23s %-12s\n",
270 rxq, txq, local_addr, rem_addr, state_str);
274 static void raw_do_one(int lnr, const char *line)
276 char local_addr[64], rem_addr[64];
277 char *state_str, more[512];
278 int num, local_port, rem_port, d, state, timer_run, uid, timeout;
279 #if ENABLE_FEATURE_IPV6
280 struct sockaddr_in6 localaddr, remaddr;
281 char addr6[INET6_ADDRSTRLEN];
284 struct sockaddr_in localaddr, remaddr;
286 unsigned long rxq, txq, time_len, retr, inode;
293 "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
294 &d, local_addr, &local_port,
295 rem_addr, &rem_port, &state,
296 &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
298 if (strlen(local_addr) > 8) {
299 #if ENABLE_FEATURE_IPV6
300 sscanf(local_addr, "%08X%08X%08X%08X",
301 &in6.s6_addr32[0], &in6.s6_addr32[1],
302 &in6.s6_addr32[2], &in6.s6_addr32[3]);
303 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
304 inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr.sin6_addr);
305 sscanf(rem_addr, "%08X%08X%08X%08X",
306 &in6.s6_addr32[0], &in6.s6_addr32[1],
307 &in6.s6_addr32[2], &in6.s6_addr32[3]);
308 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
309 inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr);
310 localaddr.sin6_family = AF_INET6;
311 remaddr.sin6_family = AF_INET6;
314 sscanf(local_addr, "%X",
315 &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
316 sscanf(rem_addr, "%X",
317 &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
318 ((struct sockaddr *) &localaddr)->sa_family = AF_INET;
319 ((struct sockaddr *) &remaddr)->sa_family = AF_INET;
323 bb_error_msg("warning, got bogus raw line");
326 state_str = itoa(state);
328 #if ENABLE_FEATURE_IPV6
329 # define notnull(A) (((A.sin6_family == AF_INET6) && \
330 ((A.sin6_addr.s6_addr32[0]) || \
331 (A.sin6_addr.s6_addr32[1]) || \
332 (A.sin6_addr.s6_addr32[2]) || \
333 (A.sin6_addr.s6_addr32[3]))) || \
334 ((A.sin6_family == AF_INET) && \
335 ((struct sockaddr_in *) &A)->sin_addr.s_addr))
337 # define notnull(A) (A.sin_addr.s_addr)
339 if ((notnull(remaddr) && (flags & NETSTAT_CONNECTED))
340 || (!notnull(remaddr) && (flags & NETSTAT_LISTENING))
342 snprint_ip_port(local_addr, sizeof(local_addr),
343 (struct sockaddr *) &localaddr, local_port,
344 "raw", flags & NETSTAT_NUMERIC);
346 snprint_ip_port(rem_addr, sizeof(rem_addr),
347 (struct sockaddr *) &remaddr, rem_port,
348 "raw", flags & NETSTAT_NUMERIC);
350 printf("raw %6ld %6ld %-23s %-23s %-12s\n",
351 rxq, txq, local_addr, rem_addr, state_str);
357 static void unix_do_one(int nr, const char *line)
360 char path[PATH_MAX], ss_flags[32];
361 const char *ss_proto, *ss_state, *ss_type;
362 int num, state, type, inode;
364 unsigned long refcnt, proto, unix_flags;
367 if (strstr(line, "Inode"))
372 num = sscanf(line, "%p: %lX %lX %lX %X %X %d %s",
373 &d, &refcnt, &proto, &unix_flags, &type, &state, &inode, path);
375 bb_error_msg("warning, got bogus unix line");
378 if (!(has & HAS_INODE))
379 snprintf(path,sizeof(path),"%d",inode);
381 if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) != (NETSTAT_LISTENING|NETSTAT_CONNECTED)) {
382 if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) {
383 if (!(flags & NETSTAT_LISTENING))
386 if (!(flags & NETSTAT_CONNECTED))
418 ss_type = "SEQPACKET";
432 * Unconnected sockets may be listening
435 if (unix_flags & SO_ACCEPTCON) {
436 ss_state = "LISTENING";
443 ss_state = "CONNECTING";
447 ss_state = "CONNECTED";
450 case SS_DISCONNECTING:
451 ss_state = "DISCONNECTING";
455 ss_state = "UNKNOWN";
458 strcpy(ss_flags, "[ ");
459 if (unix_flags & SO_ACCEPTCON)
460 strcat(ss_flags, "ACC ");
461 if (unix_flags & SO_WAITDATA)
462 strcat(ss_flags, "W ");
463 if (unix_flags & SO_NOSPACE)
464 strcat(ss_flags, "N ");
466 strcat(ss_flags, "]");
468 printf("%-5s %-6ld %-11s %-10s %-13s ",
469 ss_proto, refcnt, ss_flags, ss_type, ss_state);
471 printf("%-6d ",inode);
477 #define _PATH_PROCNET_UDP "/proc/net/udp"
478 #define _PATH_PROCNET_UDP6 "/proc/net/udp6"
479 #define _PATH_PROCNET_TCP "/proc/net/tcp"
480 #define _PATH_PROCNET_TCP6 "/proc/net/tcp6"
481 #define _PATH_PROCNET_RAW "/proc/net/raw"
482 #define _PATH_PROCNET_RAW6 "/proc/net/raw6"
483 #define _PATH_PROCNET_UNIX "/proc/net/unix"
485 static void do_info(const char *file, const char *name, void (*proc)(int, const char *))
490 procinfo = fopen(file, "r");
491 if (procinfo == NULL) {
492 if (errno != ENOENT) {
493 bb_perror_msg("%s", file);
495 bb_error_msg("no support for '%s' on this system", name);
500 char *buffer = xmalloc_fgets(procinfo);
502 (proc)(lnr++, buffer);
505 } while (!feof(procinfo));
513 int netstat_main(int argc, char **argv);
514 int netstat_main(int argc, char **argv)
518 OPT_showroute = 0x100,
521 #if ENABLE_FEATURE_IPV6
525 enum { inet = 1, inet6 = 0 };
528 /* Option string must match NETSTAT_xxx constants */
529 opt = getopt32(argc, argv, "laentuwxr");
530 if (opt & 0x1) { // -l
531 flags &= ~NETSTAT_CONNECTED;
532 flags |= NETSTAT_LISTENING;
534 if (opt & 0x2) flags |= NETSTAT_LISTENING | NETSTAT_CONNECTED; // -a
535 //if (opt & 0x4) // -e
536 if (opt & 0x8) flags |= NETSTAT_NUMERIC; // -n
537 //if (opt & 0x10) // -t: NETSTAT_TCP
538 //if (opt & 0x20) // -u: NETSTAT_UDP
539 //if (opt & 0x40) // -w: NETSTAT_RAW
540 //if (opt & 0x80) // -x: NETSTAT_UNIX
541 if (opt & OPT_showroute) { // -r
543 bb_displayroutes(flags & NETSTAT_NUMERIC, !(opt & OPT_extended));
546 bb_error_msg_and_die("-r (display routing table) is not compiled in");
550 opt &= NETSTAT_ALLPROTO;
552 flags &= ~NETSTAT_ALLPROTO;
555 if (flags & (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW)) {
556 printf("Active Internet connections "); /* xxx */
558 if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED))
559 printf("(servers and established)");
560 else if (flags & NETSTAT_LISTENING)
561 printf("(only servers)");
563 printf("(w/o servers)");
564 printf("\nProto Recv-Q Send-Q Local Address Foreign Address State\n");
566 if (inet && flags & NETSTAT_TCP)
567 do_info(_PATH_PROCNET_TCP, "AF INET (tcp)", tcp_do_one);
568 #if ENABLE_FEATURE_IPV6
569 if (inet6 && flags & NETSTAT_TCP)
570 do_info(_PATH_PROCNET_TCP6, "AF INET6 (tcp)", tcp_do_one);
572 if (inet && flags & NETSTAT_UDP)
573 do_info(_PATH_PROCNET_UDP, "AF INET (udp)", udp_do_one);
574 #if ENABLE_FEATURE_IPV6
575 if (inet6 && flags & NETSTAT_UDP)
576 do_info(_PATH_PROCNET_UDP6, "AF INET6 (udp)", udp_do_one);
578 if (inet && flags & NETSTAT_RAW)
579 do_info(_PATH_PROCNET_RAW, "AF INET (raw)", raw_do_one);
580 #if ENABLE_FEATURE_IPV6
581 if (inet6 && flags & NETSTAT_RAW)
582 do_info(_PATH_PROCNET_RAW6, "AF INET6 (raw)", raw_do_one);
584 if (flags & NETSTAT_UNIX) {
585 printf("Active UNIX domain sockets ");
586 if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED))
587 printf("(servers and established)");
588 else if (flags & NETSTAT_LISTENING)
589 printf("(only servers)");
591 printf("(w/o servers)");
592 printf("\nProto RefCnt Flags Type State I-Node Path\n");
593 do_info(_PATH_PROCNET_UNIX, "AF UNIX", unix_do_one);