Contents of /tags/mkinitrd-6_3_1/busybox/networking/netstat.c
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Thu Aug 19 12:44:27 2010 UTC (14 years, 1 month ago) by niro
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Thu Aug 19 12:44:27 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 17741 byte(s)
tagged 'mkinitrd-6_3_1'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini netstat implementation(s) for busybox |
4 | * based in part on the netstat implementation from net-tools. |
5 | * |
6 | * Copyright (C) 2002 by Bart Visscher <magick@linux-fan.com> |
7 | * |
8 | * 2002-04-20 |
9 | * IPV6 support added by Bart Visscher <magick@linux-fan.com> |
10 | * |
11 | * 2008-07-10 |
12 | * optional '-p' flag support ported from net-tools by G. Somlo <somlo@cmu.edu> |
13 | * |
14 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
15 | */ |
16 | |
17 | #include "libbb.h" |
18 | #include "inet_common.h" |
19 | |
20 | #define NETSTAT_OPTS "laentuwx" \ |
21 | IF_ROUTE( "r") \ |
22 | IF_FEATURE_NETSTAT_WIDE("W") \ |
23 | IF_FEATURE_NETSTAT_PRG( "p") |
24 | |
25 | enum { |
26 | OPTBIT_KEEP_OLD = 7, |
27 | IF_ROUTE( OPTBIT_ROUTE,) |
28 | IF_FEATURE_NETSTAT_WIDE(OPTBIT_WIDE ,) |
29 | IF_FEATURE_NETSTAT_PRG( OPTBIT_PRG ,) |
30 | OPT_sock_listen = 1 << 0, // l |
31 | OPT_sock_all = 1 << 1, // a |
32 | OPT_extended = 1 << 2, // e |
33 | OPT_noresolve = 1 << 3, // n |
34 | OPT_sock_tcp = 1 << 4, // t |
35 | OPT_sock_udp = 1 << 5, // u |
36 | OPT_sock_raw = 1 << 6, // w |
37 | OPT_sock_unix = 1 << 7, // x |
38 | OPT_route = IF_ROUTE( (1 << OPTBIT_ROUTE)) + 0, // r |
39 | OPT_wide = IF_FEATURE_NETSTAT_WIDE((1 << OPTBIT_WIDE )) + 0, // W |
40 | OPT_prg = IF_FEATURE_NETSTAT_PRG( (1 << OPTBIT_PRG )) + 0, // p |
41 | }; |
42 | |
43 | #define NETSTAT_CONNECTED 0x01 |
44 | #define NETSTAT_LISTENING 0x02 |
45 | #define NETSTAT_NUMERIC 0x04 |
46 | /* Must match getopt32 option string */ |
47 | #define NETSTAT_TCP 0x10 |
48 | #define NETSTAT_UDP 0x20 |
49 | #define NETSTAT_RAW 0x40 |
50 | #define NETSTAT_UNIX 0x80 |
51 | #define NETSTAT_ALLPROTO (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX) |
52 | |
53 | |
54 | enum { |
55 | TCP_ESTABLISHED = 1, |
56 | TCP_SYN_SENT, |
57 | TCP_SYN_RECV, |
58 | TCP_FIN_WAIT1, |
59 | TCP_FIN_WAIT2, |
60 | TCP_TIME_WAIT, |
61 | TCP_CLOSE, |
62 | TCP_CLOSE_WAIT, |
63 | TCP_LAST_ACK, |
64 | TCP_LISTEN, |
65 | TCP_CLOSING, /* now a valid state */ |
66 | }; |
67 | |
68 | static const char *const tcp_state[] = { |
69 | "", |
70 | "ESTABLISHED", |
71 | "SYN_SENT", |
72 | "SYN_RECV", |
73 | "FIN_WAIT1", |
74 | "FIN_WAIT2", |
75 | "TIME_WAIT", |
76 | "CLOSE", |
77 | "CLOSE_WAIT", |
78 | "LAST_ACK", |
79 | "LISTEN", |
80 | "CLOSING" |
81 | }; |
82 | |
83 | typedef enum { |
84 | SS_FREE = 0, /* not allocated */ |
85 | SS_UNCONNECTED, /* unconnected to any socket */ |
86 | SS_CONNECTING, /* in process of connecting */ |
87 | SS_CONNECTED, /* connected to socket */ |
88 | SS_DISCONNECTING /* in process of disconnecting */ |
89 | } socket_state; |
90 | |
91 | #define SO_ACCEPTCON (1<<16) /* performed a listen */ |
92 | #define SO_WAITDATA (1<<17) /* wait data to read */ |
93 | #define SO_NOSPACE (1<<18) /* no space to write */ |
94 | |
95 | /* Standard printout size */ |
96 | #define PRINT_IP_MAX_SIZE 23 |
97 | #define PRINT_NET_CONN "%s %6ld %6ld %-23s %-23s %-12s" |
98 | #define PRINT_NET_CONN_HEADER "\nProto Recv-Q Send-Q %-23s %-23s State " |
99 | |
100 | /* When there are IPv6 connections the IPv6 addresses will be |
101 | * truncated to none-recognition. The '-W' option makes the |
102 | * address columns wide enough to accomodate for longest possible |
103 | * IPv6 addresses, i.e. addresses of the form |
104 | * xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:ddd.ddd.ddd.ddd |
105 | */ |
106 | #define PRINT_IP_MAX_SIZE_WIDE 51 /* INET6_ADDRSTRLEN + 5 for the port number */ |
107 | #define PRINT_NET_CONN_WIDE "%s %6ld %6ld %-51s %-51s %-12s" |
108 | #define PRINT_NET_CONN_HEADER_WIDE "\nProto Recv-Q Send-Q %-51s %-51s State " |
109 | |
110 | #define PROGNAME_WIDTH 20 |
111 | #define PROGNAME_WIDTH_STR "20" |
112 | /* PROGNAME_WIDTH chars: 12345678901234567890 */ |
113 | #define PROGNAME_BANNER "PID/Program name " |
114 | |
115 | struct prg_node { |
116 | struct prg_node *next; |
117 | long inode; |
118 | char name[PROGNAME_WIDTH]; |
119 | }; |
120 | |
121 | #define PRG_HASH_SIZE 211 |
122 | |
123 | struct globals { |
124 | const char *net_conn_line; |
125 | smallint flags; |
126 | #if ENABLE_FEATURE_NETSTAT_PRG |
127 | smallint prg_cache_loaded; |
128 | struct prg_node *prg_hash[PRG_HASH_SIZE]; |
129 | #endif |
130 | }; |
131 | #define G (*ptr_to_globals) |
132 | #define flags (G.flags ) |
133 | #define net_conn_line (G.net_conn_line ) |
134 | #define prg_hash (G.prg_hash ) |
135 | #define prg_cache_loaded (G.prg_cache_loaded) |
136 | #define INIT_G() do { \ |
137 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
138 | flags = NETSTAT_CONNECTED | NETSTAT_ALLPROTO; \ |
139 | net_conn_line = PRINT_NET_CONN; \ |
140 | } while (0) |
141 | |
142 | |
143 | #if ENABLE_FEATURE_NETSTAT_PRG |
144 | |
145 | /* Deliberately truncating long to unsigned *int* */ |
146 | #define PRG_HASHIT(x) ((unsigned)(x) % PRG_HASH_SIZE) |
147 | |
148 | #define print_progname_banner() do { \ |
149 | if (option_mask32 & OPT_prg) printf(PROGNAME_BANNER); \ |
150 | } while (0) |
151 | |
152 | static void prg_cache_add(long inode, char *name) |
153 | { |
154 | unsigned hi = PRG_HASHIT(inode); |
155 | struct prg_node **pnp, *pn; |
156 | |
157 | prg_cache_loaded = 2; |
158 | for (pnp = prg_hash + hi; (pn = *pnp) != NULL; pnp = &pn->next) { |
159 | if (pn->inode == inode) { |
160 | /* Some warning should be appropriate here |
161 | as we got multiple processes for one i-node */ |
162 | return; |
163 | } |
164 | } |
165 | *pnp = xzalloc(sizeof(struct prg_node)); |
166 | pn = *pnp; |
167 | pn->inode = inode; |
168 | safe_strncpy(pn->name, name, PROGNAME_WIDTH); |
169 | } |
170 | |
171 | static const char *prg_cache_get(long inode) |
172 | { |
173 | unsigned hi = PRG_HASHIT(inode); |
174 | struct prg_node *pn; |
175 | |
176 | for (pn = prg_hash[hi]; pn; pn = pn->next) |
177 | if (pn->inode == inode) |
178 | return pn->name; |
179 | return "-"; |
180 | } |
181 | |
182 | #if ENABLE_FEATURE_CLEAN_UP |
183 | static void prg_cache_clear(void) |
184 | { |
185 | struct prg_node **pnp, *pn; |
186 | |
187 | for (pnp = prg_hash; pnp < prg_hash + PRG_HASH_SIZE; pnp++) { |
188 | while ((pn = *pnp) != NULL) { |
189 | *pnp = pn->next; |
190 | free(pn); |
191 | } |
192 | } |
193 | } |
194 | #else |
195 | #define prg_cache_clear() ((void)0) |
196 | #endif |
197 | |
198 | static long extract_socket_inode(const char *lname) |
199 | { |
200 | long inode = -1; |
201 | |
202 | if (strncmp(lname, "socket:[", sizeof("socket:[")-1) == 0) { |
203 | /* "socket:[12345]", extract the "12345" as inode */ |
204 | inode = bb_strtol(lname + sizeof("socket:[")-1, (char**)&lname, 0); |
205 | if (*lname != ']') |
206 | inode = -1; |
207 | } else if (strncmp(lname, "[0000]:", sizeof("[0000]:")-1) == 0) { |
208 | /* "[0000]:12345", extract the "12345" as inode */ |
209 | inode = bb_strtol(lname + sizeof("[0000]:")-1, NULL, 0); |
210 | if (errno) /* not NUL terminated? */ |
211 | inode = -1; |
212 | } |
213 | |
214 | #if 0 /* bb_strtol returns all-ones bit pattern on ERANGE anyway */ |
215 | if (errno == ERANGE) |
216 | inode = -1; |
217 | #endif |
218 | return inode; |
219 | } |
220 | |
221 | static int FAST_FUNC file_act(const char *fileName, |
222 | struct stat *statbuf UNUSED_PARAM, |
223 | void *userData, |
224 | int depth UNUSED_PARAM) |
225 | { |
226 | char *linkname; |
227 | long inode; |
228 | |
229 | linkname = xmalloc_readlink(fileName); |
230 | if (linkname != NULL) { |
231 | inode = extract_socket_inode(linkname); |
232 | free(linkname); |
233 | if (inode >= 0) |
234 | prg_cache_add(inode, (char *)userData); |
235 | } |
236 | return TRUE; |
237 | } |
238 | |
239 | static int FAST_FUNC dir_act(const char *fileName, |
240 | struct stat *statbuf UNUSED_PARAM, |
241 | void *userData UNUSED_PARAM, |
242 | int depth) |
243 | { |
244 | const char *shortName; |
245 | char *p, *q; |
246 | char cmdline_buf[512]; |
247 | int i; |
248 | |
249 | if (depth == 0) /* "/proc" itself */ |
250 | return TRUE; /* continue looking one level below /proc */ |
251 | |
252 | shortName = fileName + sizeof("/proc/")-1; /* point after "/proc/" */ |
253 | if (!isdigit(shortName[0])) /* skip /proc entries whic aren't processes */ |
254 | return SKIP; |
255 | |
256 | p = concat_path_file(fileName, "cmdline"); /* "/proc/PID/cmdline" */ |
257 | i = open_read_close(p, cmdline_buf, sizeof(cmdline_buf) - 1); |
258 | free(p); |
259 | if (i < 0) |
260 | return FALSE; |
261 | cmdline_buf[i] = '\0'; |
262 | q = concat_path_file(shortName, bb_basename(cmdline_buf)); /* "PID/argv0" */ |
263 | |
264 | /* go through all files in /proc/PID/fd */ |
265 | p = concat_path_file(fileName, "fd"); |
266 | i = recursive_action(p, ACTION_RECURSE | ACTION_QUIET, |
267 | file_act, NULL, (void *)q, 0); |
268 | |
269 | free(p); |
270 | free(q); |
271 | |
272 | if (!i) |
273 | return FALSE; /* signal permissions error to caller */ |
274 | |
275 | return SKIP; /* caller should not recurse further into this dir. */ |
276 | } |
277 | |
278 | static void prg_cache_load(void) |
279 | { |
280 | int load_ok; |
281 | |
282 | prg_cache_loaded = 1; |
283 | load_ok = recursive_action("/proc", ACTION_RECURSE | ACTION_QUIET, |
284 | NULL, dir_act, NULL, 0); |
285 | if (load_ok) |
286 | return; |
287 | |
288 | if (prg_cache_loaded == 1) |
289 | bb_error_msg("can't scan /proc - are you root?"); |
290 | else |
291 | bb_error_msg("showing only processes with your user ID"); |
292 | } |
293 | |
294 | #else |
295 | |
296 | #define prg_cache_clear() ((void)0) |
297 | #define print_progname_banner() ((void)0) |
298 | |
299 | #endif //ENABLE_FEATURE_NETSTAT_PRG |
300 | |
301 | |
302 | #if ENABLE_FEATURE_IPV6 |
303 | static void build_ipv6_addr(char* local_addr, struct sockaddr_in6* localaddr) |
304 | { |
305 | char addr6[INET6_ADDRSTRLEN]; |
306 | struct in6_addr in6; |
307 | |
308 | sscanf(local_addr, "%08X%08X%08X%08X", |
309 | &in6.s6_addr32[0], &in6.s6_addr32[1], |
310 | &in6.s6_addr32[2], &in6.s6_addr32[3]); |
311 | inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6)); |
312 | inet_pton(AF_INET6, addr6, &localaddr->sin6_addr); |
313 | |
314 | localaddr->sin6_family = AF_INET6; |
315 | } |
316 | #endif |
317 | |
318 | static void build_ipv4_addr(char* local_addr, struct sockaddr_in* localaddr) |
319 | { |
320 | sscanf(local_addr, "%X", &localaddr->sin_addr.s_addr); |
321 | localaddr->sin_family = AF_INET; |
322 | } |
323 | |
324 | static const char *get_sname(int port, const char *proto, int numeric) |
325 | { |
326 | if (!port) |
327 | return "*"; |
328 | if (!numeric) { |
329 | struct servent *se = getservbyport(port, proto); |
330 | if (se) |
331 | return se->s_name; |
332 | } |
333 | /* hummm, we may return static buffer here!! */ |
334 | return itoa(ntohs(port)); |
335 | } |
336 | |
337 | static char *ip_port_str(struct sockaddr *addr, int port, const char *proto, int numeric) |
338 | { |
339 | char *host, *host_port; |
340 | |
341 | /* Code which used "*" for INADDR_ANY is removed: it's ambiguous |
342 | * in IPv6, while "0.0.0.0" is not. */ |
343 | |
344 | host = numeric ? xmalloc_sockaddr2dotted_noport(addr) |
345 | : xmalloc_sockaddr2host_noport(addr); |
346 | |
347 | host_port = xasprintf("%s:%s", host, get_sname(htons(port), proto, numeric)); |
348 | free(host); |
349 | return host_port; |
350 | } |
351 | |
352 | struct inet_params { |
353 | int local_port, rem_port, state, uid; |
354 | union { |
355 | struct sockaddr sa; |
356 | struct sockaddr_in sin; |
357 | #if ENABLE_FEATURE_IPV6 |
358 | struct sockaddr_in6 sin6; |
359 | #endif |
360 | } localaddr, remaddr; |
361 | unsigned long rxq, txq, inode; |
362 | }; |
363 | |
364 | static int scan_inet_proc_line(struct inet_params *param, char *line) |
365 | { |
366 | int num; |
367 | char local_addr[64], rem_addr[64]; |
368 | |
369 | num = sscanf(line, |
370 | "%*d: %64[0-9A-Fa-f]:%X " |
371 | "%64[0-9A-Fa-f]:%X %X " |
372 | "%lX:%lX %*X:%*X " |
373 | "%*X %d %*d %ld ", |
374 | local_addr, ¶m->local_port, |
375 | rem_addr, ¶m->rem_port, ¶m->state, |
376 | ¶m->txq, ¶m->rxq, |
377 | ¶m->uid, ¶m->inode); |
378 | if (num < 9) { |
379 | return 1; /* error */ |
380 | } |
381 | |
382 | if (strlen(local_addr) > 8) { |
383 | #if ENABLE_FEATURE_IPV6 |
384 | build_ipv6_addr(local_addr, ¶m->localaddr.sin6); |
385 | build_ipv6_addr(rem_addr, ¶m->remaddr.sin6); |
386 | #endif |
387 | } else { |
388 | build_ipv4_addr(local_addr, ¶m->localaddr.sin); |
389 | build_ipv4_addr(rem_addr, ¶m->remaddr.sin); |
390 | } |
391 | return 0; |
392 | } |
393 | |
394 | static void print_inet_line(struct inet_params *param, |
395 | const char *state_str, const char *proto, int is_connected) |
396 | { |
397 | if ((is_connected && (flags & NETSTAT_CONNECTED)) |
398 | || (!is_connected && (flags & NETSTAT_LISTENING)) |
399 | ) { |
400 | char *l = ip_port_str( |
401 | ¶m->localaddr.sa, param->local_port, |
402 | proto, flags & NETSTAT_NUMERIC); |
403 | char *r = ip_port_str( |
404 | ¶m->remaddr.sa, param->rem_port, |
405 | proto, flags & NETSTAT_NUMERIC); |
406 | printf(net_conn_line, |
407 | proto, param->rxq, param->txq, l, r, state_str); |
408 | #if ENABLE_FEATURE_NETSTAT_PRG |
409 | if (option_mask32 & OPT_prg) |
410 | printf("%."PROGNAME_WIDTH_STR"s", prg_cache_get(param->inode)); |
411 | #endif |
412 | bb_putchar('\n'); |
413 | free(l); |
414 | free(r); |
415 | } |
416 | } |
417 | |
418 | static int FAST_FUNC tcp_do_one(char *line) |
419 | { |
420 | struct inet_params param; |
421 | |
422 | if (scan_inet_proc_line(¶m, line)) |
423 | return 1; |
424 | |
425 | print_inet_line(¶m, tcp_state[param.state], "tcp", param.rem_port); |
426 | return 0; |
427 | } |
428 | |
429 | #if ENABLE_FEATURE_IPV6 |
430 | # define NOT_NULL_ADDR(A) ( \ |
431 | ( (A.sa.sa_family == AF_INET6) \ |
432 | && (A.sin6.sin6_addr.s6_addr32[0] | A.sin6.sin6_addr.s6_addr32[1] | \ |
433 | A.sin6.sin6_addr.s6_addr32[2] | A.sin6.sin6_addr.s6_addr32[3]) \ |
434 | ) || ( \ |
435 | (A.sa.sa_family == AF_INET) \ |
436 | && A.sin.sin_addr.s_addr != 0 \ |
437 | ) \ |
438 | ) |
439 | #else |
440 | # define NOT_NULL_ADDR(A) (A.sin.sin_addr.s_addr) |
441 | #endif |
442 | |
443 | static int FAST_FUNC udp_do_one(char *line) |
444 | { |
445 | int have_remaddr; |
446 | const char *state_str; |
447 | struct inet_params param; |
448 | |
449 | if (scan_inet_proc_line(¶m, line)) |
450 | return 1; |
451 | |
452 | state_str = "UNKNOWN"; |
453 | switch (param.state) { |
454 | case TCP_ESTABLISHED: |
455 | state_str = "ESTABLISHED"; |
456 | break; |
457 | case TCP_CLOSE: |
458 | state_str = ""; |
459 | break; |
460 | } |
461 | |
462 | have_remaddr = NOT_NULL_ADDR(param.remaddr); |
463 | print_inet_line(¶m, state_str, "udp", have_remaddr); |
464 | return 0; |
465 | } |
466 | |
467 | static int FAST_FUNC raw_do_one(char *line) |
468 | { |
469 | int have_remaddr; |
470 | struct inet_params param; |
471 | |
472 | if (scan_inet_proc_line(¶m, line)) |
473 | return 1; |
474 | |
475 | have_remaddr = NOT_NULL_ADDR(param.remaddr); |
476 | print_inet_line(¶m, itoa(param.state), "raw", have_remaddr); |
477 | return 0; |
478 | } |
479 | |
480 | static int FAST_FUNC unix_do_one(char *line) |
481 | { |
482 | unsigned long refcnt, proto, unix_flags; |
483 | unsigned long inode; |
484 | int type, state; |
485 | int num, path_ofs; |
486 | const char *ss_proto, *ss_state, *ss_type; |
487 | char ss_flags[32]; |
488 | |
489 | /* 2.6.15 may report lines like "... @/tmp/fam-user-^@^@^@^@^@^@^@..." |
490 | * Other users report long lines filled by NUL bytes. |
491 | * (those ^@ are NUL bytes too). We see them as empty lines. */ |
492 | if (!line[0]) |
493 | return 0; |
494 | |
495 | path_ofs = 0; /* paranoia */ |
496 | num = sscanf(line, "%*p: %lX %lX %lX %X %X %lu %n", |
497 | &refcnt, &proto, &unix_flags, &type, &state, &inode, &path_ofs); |
498 | if (num < 6) { |
499 | return 1; /* error */ |
500 | } |
501 | if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) != (NETSTAT_LISTENING|NETSTAT_CONNECTED)) { |
502 | if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) { |
503 | if (!(flags & NETSTAT_LISTENING)) |
504 | return 0; |
505 | } else { |
506 | if (!(flags & NETSTAT_CONNECTED)) |
507 | return 0; |
508 | } |
509 | } |
510 | |
511 | switch (proto) { |
512 | case 0: |
513 | ss_proto = "unix"; |
514 | break; |
515 | default: |
516 | ss_proto = "??"; |
517 | } |
518 | |
519 | switch (type) { |
520 | case SOCK_STREAM: |
521 | ss_type = "STREAM"; |
522 | break; |
523 | case SOCK_DGRAM: |
524 | ss_type = "DGRAM"; |
525 | break; |
526 | case SOCK_RAW: |
527 | ss_type = "RAW"; |
528 | break; |
529 | case SOCK_RDM: |
530 | ss_type = "RDM"; |
531 | break; |
532 | case SOCK_SEQPACKET: |
533 | ss_type = "SEQPACKET"; |
534 | break; |
535 | default: |
536 | ss_type = "UNKNOWN"; |
537 | } |
538 | |
539 | switch (state) { |
540 | case SS_FREE: |
541 | ss_state = "FREE"; |
542 | break; |
543 | case SS_UNCONNECTED: |
544 | /* |
545 | * Unconnected sockets may be listening |
546 | * for something. |
547 | */ |
548 | if (unix_flags & SO_ACCEPTCON) { |
549 | ss_state = "LISTENING"; |
550 | } else { |
551 | ss_state = ""; |
552 | } |
553 | break; |
554 | case SS_CONNECTING: |
555 | ss_state = "CONNECTING"; |
556 | break; |
557 | case SS_CONNECTED: |
558 | ss_state = "CONNECTED"; |
559 | break; |
560 | case SS_DISCONNECTING: |
561 | ss_state = "DISCONNECTING"; |
562 | break; |
563 | default: |
564 | ss_state = "UNKNOWN"; |
565 | } |
566 | |
567 | strcpy(ss_flags, "[ "); |
568 | if (unix_flags & SO_ACCEPTCON) |
569 | strcat(ss_flags, "ACC "); |
570 | if (unix_flags & SO_WAITDATA) |
571 | strcat(ss_flags, "W "); |
572 | if (unix_flags & SO_NOSPACE) |
573 | strcat(ss_flags, "N "); |
574 | strcat(ss_flags, "]"); |
575 | |
576 | printf("%-5s %-6ld %-11s %-10s %-13s %6lu ", |
577 | ss_proto, refcnt, ss_flags, ss_type, ss_state, inode |
578 | ); |
579 | |
580 | #if ENABLE_FEATURE_NETSTAT_PRG |
581 | if (option_mask32 & OPT_prg) |
582 | printf("%-"PROGNAME_WIDTH_STR"s", prg_cache_get(inode)); |
583 | #endif |
584 | |
585 | /* TODO: currently we stop at first NUL byte. Is it a problem? */ |
586 | line += path_ofs; |
587 | *strchrnul(line, '\n') = '\0'; |
588 | while (*line) |
589 | fputc_printable(*line++, stdout); |
590 | bb_putchar('\n'); |
591 | return 0; |
592 | } |
593 | |
594 | static void do_info(const char *file, int FAST_FUNC (*proc)(char *)) |
595 | { |
596 | int lnr; |
597 | FILE *procinfo; |
598 | char *buffer; |
599 | |
600 | /* _stdin is just to save "r" param */ |
601 | procinfo = fopen_or_warn_stdin(file); |
602 | if (procinfo == NULL) { |
603 | return; |
604 | } |
605 | lnr = 0; |
606 | /* Why xmalloc_fgets_str? because it doesn't stop on NULs */ |
607 | while ((buffer = xmalloc_fgets_str(procinfo, "\n")) != NULL) { |
608 | /* line 0 is skipped */ |
609 | if (lnr && proc(buffer)) |
610 | bb_error_msg("%s: bogus data on line %d", file, lnr + 1); |
611 | lnr++; |
612 | free(buffer); |
613 | } |
614 | fclose(procinfo); |
615 | } |
616 | |
617 | int netstat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
618 | int netstat_main(int argc UNUSED_PARAM, char **argv) |
619 | { |
620 | const char *net_conn_line_header = PRINT_NET_CONN_HEADER; |
621 | unsigned opt; |
622 | |
623 | INIT_G(); |
624 | |
625 | /* Option string must match NETSTAT_xxx constants */ |
626 | opt = getopt32(argv, NETSTAT_OPTS); |
627 | if (opt & 0x1) { // -l |
628 | flags &= ~NETSTAT_CONNECTED; |
629 | flags |= NETSTAT_LISTENING; |
630 | } |
631 | if (opt & 0x2) flags |= NETSTAT_LISTENING | NETSTAT_CONNECTED; // -a |
632 | //if (opt & 0x4) // -e |
633 | if (opt & 0x8) flags |= NETSTAT_NUMERIC; // -n |
634 | //if (opt & 0x10) // -t: NETSTAT_TCP |
635 | //if (opt & 0x20) // -u: NETSTAT_UDP |
636 | //if (opt & 0x40) // -w: NETSTAT_RAW |
637 | //if (opt & 0x80) // -x: NETSTAT_UNIX |
638 | if (opt & OPT_route) { // -r |
639 | #if ENABLE_ROUTE |
640 | bb_displayroutes(flags & NETSTAT_NUMERIC, !(opt & OPT_extended)); |
641 | return 0; |
642 | #else |
643 | bb_show_usage(); |
644 | #endif |
645 | } |
646 | if (opt & OPT_wide) { // -W |
647 | net_conn_line = PRINT_NET_CONN_WIDE; |
648 | net_conn_line_header = PRINT_NET_CONN_HEADER_WIDE; |
649 | } |
650 | #if ENABLE_FEATURE_NETSTAT_PRG |
651 | if (opt & OPT_prg) { // -p |
652 | prg_cache_load(); |
653 | } |
654 | #endif |
655 | |
656 | opt &= NETSTAT_ALLPROTO; |
657 | if (opt) { |
658 | flags &= ~NETSTAT_ALLPROTO; |
659 | flags |= opt; |
660 | } |
661 | if (flags & (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW)) { |
662 | printf("Active Internet connections "); /* xxx */ |
663 | |
664 | if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED)) |
665 | printf("(servers and established)"); |
666 | else if (flags & NETSTAT_LISTENING) |
667 | printf("(only servers)"); |
668 | else |
669 | printf("(w/o servers)"); |
670 | printf(net_conn_line_header, "Local Address", "Foreign Address"); |
671 | print_progname_banner(); |
672 | bb_putchar('\n'); |
673 | } |
674 | if (flags & NETSTAT_TCP) { |
675 | do_info("/proc/net/tcp", tcp_do_one); |
676 | #if ENABLE_FEATURE_IPV6 |
677 | do_info("/proc/net/tcp6", tcp_do_one); |
678 | #endif |
679 | } |
680 | if (flags & NETSTAT_UDP) { |
681 | do_info("/proc/net/udp", udp_do_one); |
682 | #if ENABLE_FEATURE_IPV6 |
683 | do_info("/proc/net/udp6", udp_do_one); |
684 | #endif |
685 | } |
686 | if (flags & NETSTAT_RAW) { |
687 | do_info("/proc/net/raw", raw_do_one); |
688 | #if ENABLE_FEATURE_IPV6 |
689 | do_info("/proc/net/raw6", raw_do_one); |
690 | #endif |
691 | } |
692 | if (flags & NETSTAT_UNIX) { |
693 | printf("Active UNIX domain sockets "); |
694 | if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED)) |
695 | printf("(servers and established)"); |
696 | else if (flags & NETSTAT_LISTENING) |
697 | printf("(only servers)"); |
698 | else |
699 | printf("(w/o servers)"); |
700 | printf("\nProto RefCnt Flags Type State I-Node "); |
701 | print_progname_banner(); |
702 | printf("Path\n"); |
703 | do_info("/proc/net/unix", unix_do_one); |
704 | } |
705 | prg_cache_clear(); |
706 | return 0; |
707 | } |