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"
18 extern void displayroutes(int noresolve, int netstatfmt);
21 #define NETSTAT_CONNECTED 0x01
22 #define NETSTAT_LISTENING 0x02
23 #define NETSTAT_NUMERIC 0x04
24 /* Must match getopt32 option string */
25 #define NETSTAT_TCP 0x10
26 #define NETSTAT_UDP 0x20
27 #define NETSTAT_RAW 0x40
28 #define NETSTAT_UNIX 0x80
29 #define NETSTAT_ALLPROTO (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX)
31 static int flags = NETSTAT_CONNECTED | NETSTAT_ALLPROTO;
33 #define PROGNAME_WIDTHs PROGNAME_WIDTH1(PROGNAME_WIDTH)
34 #define PROGNAME_WIDTH1(s) PROGNAME_WIDTH2(s)
35 #define PROGNAME_WIDTH2(s) #s
37 #define PRG_HASH_SIZE 211
50 TCP_CLOSING /* now a valid state */
53 static const char * const tcp_state[] =
70 SS_FREE = 0, /* not allocated */
71 SS_UNCONNECTED, /* unconnected to any socket */
72 SS_CONNECTING, /* in process of connecting */
73 SS_CONNECTED, /* connected to socket */
74 SS_DISCONNECTING /* in process of disconnecting */
77 #define SO_ACCEPTCON (1<<16) /* performed a listen */
78 #define SO_WAITDATA (1<<17) /* wait data to read */
79 #define SO_NOSPACE (1<<18) /* no space to write */
81 static char *get_sname(int port, const char *proto, int num)
83 char *str=itoa(ntohs(port));
86 struct servent *se=getservbyport(port,proto);
96 static void snprint_ip_port(char *ip_port, int size, struct sockaddr *addr, int port, char *proto, int numeric)
100 #ifdef CONFIG_FEATURE_IPV6
101 if (addr->sa_family == AF_INET6) {
102 INET6_rresolve(ip_port, size, (struct sockaddr_in6 *)addr,
103 (numeric&NETSTAT_NUMERIC) ? 0x0fff : 0);
107 INET_rresolve(ip_port, size, (struct sockaddr_in *)addr,
108 0x4000 | ((numeric&NETSTAT_NUMERIC) ? 0x0fff : 0),
111 port_name=get_sname(htons(port), proto, numeric);
112 if ((strlen(ip_port) + strlen(port_name)) > 22)
113 ip_port[22 - strlen(port_name)] = '\0';
114 ip_port+=strlen(ip_port);
115 strcat(ip_port, ":");
116 strcat(ip_port, port_name);
119 static void tcp_do_one(int lnr, const char *line)
121 char local_addr[64], rem_addr[64];
122 const char *state_str;
124 int num, local_port, rem_port, d, state, timer_run, uid, timeout;
125 #ifdef CONFIG_FEATURE_IPV6
126 struct sockaddr_in6 localaddr, remaddr;
127 char addr6[INET6_ADDRSTRLEN];
130 struct sockaddr_in localaddr, remaddr;
132 unsigned long rxq, txq, time_len, retr, inode;
139 "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
140 &d, local_addr, &local_port,
141 rem_addr, &rem_port, &state,
142 &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
144 if (strlen(local_addr) > 8) {
145 #ifdef CONFIG_FEATURE_IPV6
146 sscanf(local_addr, "%08X%08X%08X%08X",
147 &in6.s6_addr32[0], &in6.s6_addr32[1],
148 &in6.s6_addr32[2], &in6.s6_addr32[3]);
149 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
150 inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr.sin6_addr);
151 sscanf(rem_addr, "%08X%08X%08X%08X",
152 &in6.s6_addr32[0], &in6.s6_addr32[1],
153 &in6.s6_addr32[2], &in6.s6_addr32[3]);
154 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
155 inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr);
156 localaddr.sin6_family = AF_INET6;
157 remaddr.sin6_family = AF_INET6;
160 sscanf(local_addr, "%X",
161 &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
162 sscanf(rem_addr, "%X",
163 &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
164 ((struct sockaddr *) &localaddr)->sa_family = AF_INET;
165 ((struct sockaddr *) &remaddr)->sa_family = AF_INET;
169 bb_error_msg("warning, got bogus tcp line");
172 state_str = tcp_state[state];
173 if ((rem_port && (flags&NETSTAT_CONNECTED)) ||
174 (!rem_port && (flags&NETSTAT_LISTENING)))
176 snprint_ip_port(local_addr, sizeof(local_addr),
177 (struct sockaddr *) &localaddr, local_port,
178 "tcp", flags&NETSTAT_NUMERIC);
180 snprint_ip_port(rem_addr, sizeof(rem_addr),
181 (struct sockaddr *) &remaddr, rem_port,
182 "tcp", flags&NETSTAT_NUMERIC);
184 printf("tcp %6ld %6ld %-23s %-23s %-12s\n",
185 rxq, txq, local_addr, rem_addr, state_str);
190 static void udp_do_one(int lnr, const char *line)
192 char local_addr[64], rem_addr[64];
193 char *state_str, more[512];
194 int num, local_port, rem_port, d, state, timer_run, uid, timeout;
195 #ifdef CONFIG_FEATURE_IPV6
196 struct sockaddr_in6 localaddr, remaddr;
197 char addr6[INET6_ADDRSTRLEN];
200 struct sockaddr_in localaddr, remaddr;
202 unsigned long rxq, txq, time_len, retr, inode;
209 "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
210 &d, local_addr, &local_port,
211 rem_addr, &rem_port, &state,
212 &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
214 if (strlen(local_addr) > 8) {
215 #ifdef CONFIG_FEATURE_IPV6
216 /* Demangle what the kernel gives us */
217 sscanf(local_addr, "%08X%08X%08X%08X",
218 &in6.s6_addr32[0], &in6.s6_addr32[1],
219 &in6.s6_addr32[2], &in6.s6_addr32[3]);
220 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
221 inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr.sin6_addr);
222 sscanf(rem_addr, "%08X%08X%08X%08X",
223 &in6.s6_addr32[0], &in6.s6_addr32[1],
224 &in6.s6_addr32[2], &in6.s6_addr32[3]);
225 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
226 inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr);
227 localaddr.sin6_family = AF_INET6;
228 remaddr.sin6_family = AF_INET6;
231 sscanf(local_addr, "%X",
232 &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
233 sscanf(rem_addr, "%X",
234 &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
235 ((struct sockaddr *) &localaddr)->sa_family = AF_INET;
236 ((struct sockaddr *) &remaddr)->sa_family = AF_INET;
240 bb_error_msg("warning, got bogus udp line");
244 case TCP_ESTABLISHED:
245 state_str = "ESTABLISHED";
253 state_str = "UNKNOWN";
257 #ifdef CONFIG_FEATURE_IPV6
258 # define notnull(A) (((A.sin6_family == AF_INET6) && \
259 ((A.sin6_addr.s6_addr32[0]) || \
260 (A.sin6_addr.s6_addr32[1]) || \
261 (A.sin6_addr.s6_addr32[2]) || \
262 (A.sin6_addr.s6_addr32[3]))) || \
263 ((A.sin6_family == AF_INET) && \
264 ((struct sockaddr_in *) &A)->sin_addr.s_addr))
266 # define notnull(A) (A.sin_addr.s_addr)
268 if ((notnull(remaddr) && (flags&NETSTAT_CONNECTED)) ||
269 (!notnull(remaddr) && (flags&NETSTAT_LISTENING)))
271 snprint_ip_port(local_addr, sizeof(local_addr),
272 (struct sockaddr *) &localaddr, local_port,
273 "udp", flags&NETSTAT_NUMERIC);
275 snprint_ip_port(rem_addr, sizeof(rem_addr),
276 (struct sockaddr *) &remaddr, rem_port,
277 "udp", flags&NETSTAT_NUMERIC);
279 printf("udp %6ld %6ld %-23s %-23s %-12s\n",
280 rxq, txq, local_addr, rem_addr, state_str);
285 static void raw_do_one(int lnr, const char *line)
287 char local_addr[64], rem_addr[64];
288 char *state_str, more[512];
289 int num, local_port, rem_port, d, state, timer_run, uid, timeout;
290 #ifdef CONFIG_FEATURE_IPV6
291 struct sockaddr_in6 localaddr, remaddr;
292 char addr6[INET6_ADDRSTRLEN];
295 struct sockaddr_in localaddr, remaddr;
297 unsigned long rxq, txq, time_len, retr, inode;
304 "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
305 &d, local_addr, &local_port,
306 rem_addr, &rem_port, &state,
307 &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
309 if (strlen(local_addr) > 8) {
310 #ifdef CONFIG_FEATURE_IPV6
311 sscanf(local_addr, "%08X%08X%08X%08X",
312 &in6.s6_addr32[0], &in6.s6_addr32[1],
313 &in6.s6_addr32[2], &in6.s6_addr32[3]);
314 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
315 inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr.sin6_addr);
316 sscanf(rem_addr, "%08X%08X%08X%08X",
317 &in6.s6_addr32[0], &in6.s6_addr32[1],
318 &in6.s6_addr32[2], &in6.s6_addr32[3]);
319 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
320 inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr);
321 localaddr.sin6_family = AF_INET6;
322 remaddr.sin6_family = AF_INET6;
325 sscanf(local_addr, "%X",
326 &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
327 sscanf(rem_addr, "%X",
328 &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
329 ((struct sockaddr *) &localaddr)->sa_family = AF_INET;
330 ((struct sockaddr *) &remaddr)->sa_family = AF_INET;
334 bb_error_msg("warning, got bogus raw line");
337 state_str=itoa(state);
339 #ifdef CONFIG_FEATURE_IPV6
340 # define notnull(A) (((A.sin6_family == AF_INET6) && \
341 ((A.sin6_addr.s6_addr32[0]) || \
342 (A.sin6_addr.s6_addr32[1]) || \
343 (A.sin6_addr.s6_addr32[2]) || \
344 (A.sin6_addr.s6_addr32[3]))) || \
345 ((A.sin6_family == AF_INET) && \
346 ((struct sockaddr_in *) &A)->sin_addr.s_addr))
348 # define notnull(A) (A.sin_addr.s_addr)
350 if ((notnull(remaddr) && (flags&NETSTAT_CONNECTED)) ||
351 (!notnull(remaddr) && (flags&NETSTAT_LISTENING)))
353 snprint_ip_port(local_addr, sizeof(local_addr),
354 (struct sockaddr *) &localaddr, local_port,
355 "raw", flags&NETSTAT_NUMERIC);
357 snprint_ip_port(rem_addr, sizeof(rem_addr),
358 (struct sockaddr *) &remaddr, rem_port,
359 "raw", flags&NETSTAT_NUMERIC);
361 printf("raw %6ld %6ld %-23s %-23s %-12s\n",
362 rxq, txq, local_addr, rem_addr, state_str);
369 static void unix_do_one(int nr, const char *line)
372 char path[PATH_MAX], ss_flags[32];
373 char *ss_proto, *ss_state, *ss_type;
374 int num, state, type, inode;
376 unsigned long refcnt, proto, unix_flags;
379 if (strstr(line, "Inode"))
384 num = sscanf(line, "%p: %lX %lX %lX %X %X %d %s",
385 &d, &refcnt, &proto, &unix_flags, &type, &state, &inode, path);
387 bb_error_msg("warning, got bogus unix line");
390 if (!(has & HAS_INODE))
391 snprintf(path,sizeof(path),"%d",inode);
393 if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))!=(NETSTAT_LISTENING|NETSTAT_CONNECTED)) {
394 if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) {
395 if (!(flags&NETSTAT_LISTENING))
398 if (!(flags&NETSTAT_CONNECTED))
430 ss_type = "SEQPACKET";
444 * Unconnected sockets may be listening
447 if (unix_flags & SO_ACCEPTCON) {
448 ss_state = "LISTENING";
455 ss_state = "CONNECTING";
459 ss_state = "CONNECTED";
462 case SS_DISCONNECTING:
463 ss_state = "DISCONNECTING";
467 ss_state = "UNKNOWN";
470 strcpy(ss_flags, "[ ");
471 if (unix_flags & SO_ACCEPTCON)
472 strcat(ss_flags, "ACC ");
473 if (unix_flags & SO_WAITDATA)
474 strcat(ss_flags, "W ");
475 if (unix_flags & SO_NOSPACE)
476 strcat(ss_flags, "N ");
478 strcat(ss_flags, "]");
480 printf("%-5s %-6ld %-11s %-10s %-13s ",
481 ss_proto, refcnt, ss_flags, ss_type, ss_state);
483 printf("%-6d ",inode);
489 #define _PATH_PROCNET_UDP "/proc/net/udp"
490 #define _PATH_PROCNET_UDP6 "/proc/net/udp6"
491 #define _PATH_PROCNET_TCP "/proc/net/tcp"
492 #define _PATH_PROCNET_TCP6 "/proc/net/tcp6"
493 #define _PATH_PROCNET_RAW "/proc/net/raw"
494 #define _PATH_PROCNET_RAW6 "/proc/net/raw6"
495 #define _PATH_PROCNET_UNIX "/proc/net/unix"
497 static void do_info(const char *file, const char *name, void (*proc)(int, const char *))
502 procinfo = fopen(file, "r");
503 if (procinfo == NULL) {
504 if (errno != ENOENT) {
507 bb_error_msg("no support for '%s' on this system", name);
511 char *buffer = xmalloc_fgets(procinfo);
513 (proc)(lnr++, buffer);
516 } while (!feof(procinfo));
525 int netstat_main(int argc, char **argv)
529 OPT_showroute = 0x100,
532 #ifdef CONFIG_FEATURE_IPV6
540 /* Option string must match NETSTAT_xxx constants */
541 opt = getopt32(argc, argv, "laentuwxr");
542 if (opt & 0x1) { // -l
543 flags &= ~NETSTAT_CONNECTED;
544 flags |= NETSTAT_LISTENING;
546 if (opt & 0x2) flags |= NETSTAT_LISTENING | NETSTAT_CONNECTED; // -a
547 //if (opt & 0x4) // -e
548 if (opt & 0x8) flags |= NETSTAT_NUMERIC; // -n
549 //if (opt & 0x10) // -t: NETSTAT_TCP
550 //if (opt & 0x20) // -u: NETSTAT_UDP
551 //if (opt & 0x40) // -w: NETSTAT_RAW
552 //if (opt & 0x80) // -x: NETSTAT_UNIX
553 if (opt & OPT_showroute) { // -r
555 displayroutes(flags & NETSTAT_NUMERIC, !(opt & OPT_extended));
558 bb_error_msg_and_die("-r (display routing table) is not compiled in");
562 opt &= NETSTAT_ALLPROTO;
564 flags &= ~NETSTAT_ALLPROTO;
567 if (flags & (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW)) {
568 printf("Active Internet connections "); /* xxx */
570 if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))==(NETSTAT_LISTENING|NETSTAT_CONNECTED))
571 printf("(servers and established)");
573 if (flags & NETSTAT_LISTENING)
574 printf("(only servers)");
576 printf("(w/o servers)");
578 printf("\nProto Recv-Q Send-Q Local Address Foreign Address State\n");
580 if (inet && flags&NETSTAT_TCP)
581 do_info(_PATH_PROCNET_TCP,"AF INET (tcp)",tcp_do_one);
582 #ifdef CONFIG_FEATURE_IPV6
583 if (inet6 && flags&NETSTAT_TCP)
584 do_info(_PATH_PROCNET_TCP6,"AF INET6 (tcp)",tcp_do_one);
586 if (inet && flags&NETSTAT_UDP)
587 do_info(_PATH_PROCNET_UDP,"AF INET (udp)",udp_do_one);
588 #ifdef CONFIG_FEATURE_IPV6
589 if (inet6 && flags&NETSTAT_UDP)
590 do_info(_PATH_PROCNET_UDP6,"AF INET6 (udp)",udp_do_one);
592 if (inet && flags&NETSTAT_RAW)
593 do_info(_PATH_PROCNET_RAW,"AF INET (raw)",raw_do_one);
594 #ifdef CONFIG_FEATURE_IPV6
595 if (inet6 && flags&NETSTAT_RAW)
596 do_info(_PATH_PROCNET_RAW6,"AF INET6 (raw)",raw_do_one);
598 if (flags&NETSTAT_UNIX) {
599 printf("Active UNIX domain sockets ");
600 if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))==(NETSTAT_LISTENING|NETSTAT_CONNECTED))
601 printf("(servers and established)");
603 if (flags&NETSTAT_LISTENING)
604 printf("(only servers)");
606 printf("(w/o servers)");
609 printf("\nProto RefCnt Flags Type State I-Node Path\n");
610 do_info(_PATH_PROCNET_UNIX,"AF UNIX",unix_do_one);