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Commit | Line | Data |
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0ee16e43 MY |
1 | /* |
2 | * lsfd-sock-xinfo.c - read various information from files under /proc/net/ | |
3 | * | |
4 | * Copyright (C) 2022 Red Hat, Inc. All rights reserved. | |
5 | * Written by Masatake YAMATO <yamato@redhat.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it would be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software Foundation, | |
19 | * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
7b2a9be0 | 21 | #include <arpa/inet.h> /* inet_ntop */ |
2e38e61c MY |
22 | #include <fcntl.h> /* open(2) */ |
23 | #include <linux/net.h> /* SS_* */ | |
24 | #include <linux/un.h> /* UNIX_PATH_MAX */ | |
0ee16e43 MY |
25 | #include <sched.h> /* for setns(2) */ |
26 | #include <search.h> | |
2e38e61c MY |
27 | #include <stdint.h> |
28 | #include <string.h> | |
29 | #include <sys/socket.h> /* SOCK_* */ | |
0ee16e43 MY |
30 | |
31 | #include "xalloc.h" | |
32 | #include "nls.h" | |
33 | #include "libsmartcols.h" | |
34 | ||
35 | #include "lsfd.h" | |
36 | #include "lsfd-sock.h" | |
37 | ||
2e38e61c | 38 | static void load_xinfo_from_proc_unix(ino_t netns_inode); |
7b2a9be0 | 39 | static void load_xinfo_from_proc_tcp(ino_t netns_inode); |
2e38e61c | 40 | |
0ee16e43 MY |
41 | static int self_netns_fd = -1; |
42 | struct stat self_netns_sb; | |
43 | ||
44 | static void *xinfo_tree; /* for tsearch/tfind */ | |
45 | static void *netns_tree; | |
46 | ||
47 | static int netns_compare(const void *a, const void *b) | |
48 | { | |
49 | if (*(ino_t *)a < *(ino_t *)b) | |
50 | return -1; | |
51 | else if (*(ino_t *)a > *(ino_t *)b) | |
52 | return 1; | |
53 | else | |
54 | return 0; | |
55 | } | |
56 | ||
57 | static bool is_sock_xinfo_loaded(ino_t netns) | |
58 | { | |
59 | return tfind(&netns, &netns_tree, netns_compare)? true: false; | |
60 | } | |
61 | ||
62 | static void mark_sock_xinfo_loaded(ino_t ino) | |
63 | { | |
64 | ino_t *netns = xmalloc(sizeof(ino)); | |
65 | ino_t **tmp; | |
66 | ||
67 | *netns = ino; | |
68 | tmp = tsearch(netns, &netns_tree, netns_compare); | |
69 | if (tmp == NULL) | |
70 | errx(EXIT_FAILURE, _("failed to allocate memory")); | |
71 | } | |
72 | ||
2e38e61c | 73 | static void load_sock_xinfo_no_nsswitch(ino_t netns) |
0ee16e43 | 74 | { |
2e38e61c | 75 | load_xinfo_from_proc_unix(netns); |
7b2a9be0 | 76 | load_xinfo_from_proc_tcp(netns); |
0ee16e43 MY |
77 | } |
78 | ||
79 | static void load_sock_xinfo_with_fd(int fd, ino_t netns) | |
80 | { | |
b3649945 | 81 | if (setns(fd, CLONE_NEWNET) == 0) { |
0ee16e43 | 82 | load_sock_xinfo_no_nsswitch(netns); |
b3649945 | 83 | setns(self_netns_fd, CLONE_NEWNET); |
0ee16e43 MY |
84 | } |
85 | } | |
86 | ||
87 | void load_sock_xinfo(struct path_cxt *pc, const char *name, ino_t netns) | |
88 | { | |
89 | if (self_netns_fd == -1) | |
90 | return; | |
91 | ||
92 | if (!is_sock_xinfo_loaded(netns)) { | |
93 | int fd; | |
94 | ||
95 | mark_sock_xinfo_loaded(netns); | |
96 | fd = ul_path_open(pc, O_RDONLY, name); | |
97 | if (fd < 0) | |
98 | return; | |
99 | ||
100 | load_sock_xinfo_with_fd(fd, netns); | |
101 | close(fd); | |
102 | } | |
103 | } | |
104 | ||
105 | void initialize_sock_xinfos(void) | |
106 | { | |
107 | struct path_cxt *pc; | |
108 | DIR *dir; | |
109 | struct dirent *d; | |
110 | ||
111 | self_netns_fd = open("/proc/self/ns/net", O_RDONLY); | |
112 | ||
113 | if (self_netns_fd < 0) | |
114 | load_sock_xinfo_no_nsswitch(0); | |
115 | else { | |
116 | if (fstat(self_netns_fd, &self_netns_sb) == 0) { | |
117 | mark_sock_xinfo_loaded(self_netns_sb.st_ino); | |
118 | load_sock_xinfo_no_nsswitch(self_netns_sb.st_ino); | |
119 | } | |
120 | } | |
121 | ||
122 | /* Load /proc/net/{unix,...} of the network namespace | |
123 | * specified with netns files under /var/run/netns/. | |
124 | * | |
125 | * `ip netns' command pins a network namespace on | |
126 | * /var/run/netns. | |
127 | */ | |
128 | pc = ul_new_path("/var/run/netns"); | |
129 | if (!pc) | |
130 | err(EXIT_FAILURE, _("failed to alloc path context for /var/run/netns")); | |
131 | dir = ul_path_opendir(pc, NULL); | |
132 | if (dir == NULL) { | |
133 | ul_unref_path(pc); | |
134 | return; | |
135 | } | |
136 | while ((d = readdir(dir))) { | |
137 | struct stat sb; | |
138 | int fd; | |
139 | if (ul_path_stat(pc, &sb, 0, d->d_name) < 0) | |
140 | continue; | |
141 | if (is_sock_xinfo_loaded(sb.st_ino)) | |
142 | continue; | |
143 | mark_sock_xinfo_loaded(sb.st_ino); | |
144 | fd = ul_path_open(pc, O_RDONLY, d->d_name); | |
145 | if (fd < 0) | |
146 | continue; | |
147 | load_sock_xinfo_with_fd(fd, sb.st_ino); | |
148 | close(fd); | |
149 | } | |
150 | closedir(dir); | |
151 | ul_unref_path(pc); | |
152 | } | |
153 | ||
b3649945 | 154 | static void free_sock_xinfo(void *node) |
0ee16e43 MY |
155 | { |
156 | struct sock_xinfo *xinfo = node; | |
157 | if (xinfo->class->free) | |
b3649945 | 158 | xinfo->class->free(xinfo); |
0ee16e43 MY |
159 | free(node); |
160 | } | |
161 | ||
162 | void finalize_sock_xinfos(void) | |
163 | { | |
164 | if (self_netns_fd != -1) | |
165 | close(self_netns_fd); | |
166 | tdestroy(netns_tree, free); | |
167 | tdestroy(xinfo_tree, free_sock_xinfo); | |
168 | } | |
169 | ||
170 | static int xinfo_compare(const void *a, const void *b) | |
171 | { | |
172 | if (((struct sock_xinfo *)a)->inode < ((struct sock_xinfo *)b)->inode) | |
173 | return -1; | |
174 | if (((struct sock_xinfo *)a)->inode > ((struct sock_xinfo *)b)->inode) | |
175 | return 1; | |
176 | return 0; | |
177 | } | |
178 | ||
2e38e61c MY |
179 | static void add_sock_info(struct sock_xinfo *xinfo) |
180 | { | |
181 | struct sock_xinfo **tmp = tsearch(xinfo, &xinfo_tree, xinfo_compare); | |
182 | ||
183 | if (tmp == NULL) | |
184 | errx(EXIT_FAILURE, _("failed to allocate memory")); | |
185 | } | |
186 | ||
0ee16e43 MY |
187 | struct sock_xinfo *get_sock_xinfo(ino_t netns_inode) |
188 | { | |
189 | struct sock_xinfo **xinfo = tfind(&netns_inode, &xinfo_tree, xinfo_compare); | |
190 | ||
191 | if (xinfo) | |
192 | return *xinfo; | |
193 | return NULL; | |
194 | } | |
195 | ||
196 | bool is_nsfs_dev(dev_t dev) | |
197 | { | |
198 | return (dev == self_netns_sb.st_dev); | |
199 | } | |
2e38e61c MY |
200 | |
201 | static const char *sock_decode_type(uint16_t type) | |
202 | { | |
203 | switch (type) { | |
204 | case SOCK_STREAM: | |
205 | return "stream"; | |
206 | case SOCK_DGRAM: | |
207 | return "dgram"; | |
208 | case SOCK_RAW: | |
209 | return "raw"; | |
210 | case SOCK_RDM: | |
211 | return "rdm"; | |
212 | case SOCK_SEQPACKET: | |
213 | return "seqpacket"; | |
214 | case SOCK_DCCP: | |
215 | return "dccp"; | |
216 | case SOCK_PACKET: | |
217 | return "packet"; | |
218 | default: | |
219 | return "unknown"; | |
220 | } | |
221 | } | |
222 | ||
223 | /* | |
224 | * Protocol specific code | |
225 | */ | |
226 | ||
227 | /* | |
228 | * UNIX | |
229 | */ | |
230 | struct unix_xinfo { | |
231 | struct sock_xinfo sock; | |
232 | int acceptcon; /* flags */ | |
233 | uint16_t type; | |
234 | uint8_t st; | |
235 | char path[ | |
236 | UNIX_PATH_MAX | |
237 | + 1 /* for @ */ | |
238 | + 1 /* \0? */ | |
239 | ]; | |
240 | }; | |
241 | ||
242 | static const char *unix_decode_state(uint8_t st) | |
243 | { | |
244 | switch (st) { | |
245 | case SS_FREE: | |
246 | return "free"; | |
247 | case SS_UNCONNECTED: | |
248 | return "unconnected"; | |
249 | case SS_CONNECTING: | |
250 | return "connecting"; | |
251 | case SS_CONNECTED: | |
252 | return "connected"; | |
253 | case SS_DISCONNECTING: | |
254 | return "disconnecting"; | |
255 | default: | |
256 | return "unknown"; | |
257 | } | |
258 | } | |
259 | ||
260 | static char *unix_get_name(struct sock_xinfo *sock_xinfo, | |
261 | struct sock *sock) | |
262 | { | |
263 | struct unix_xinfo *ux = (struct unix_xinfo *)sock_xinfo; | |
264 | const char *state = unix_decode_state(ux->st); | |
265 | char *str = NULL; | |
266 | ||
267 | if (sock->protoname && (strcmp(sock->protoname, "UNIX-STREAM") == 0)) | |
268 | xasprintf(&str, "state=%s%s%s", | |
269 | (ux->acceptcon)? "listen": state, | |
270 | *(ux->path)? " path=": "", | |
271 | *(ux->path)? ux->path: ""); | |
272 | else | |
273 | xasprintf(&str, "state=%s%s%s type=%s", | |
274 | (ux->acceptcon)? "listen": state, | |
275 | *(ux->path)? " path=": "", | |
276 | *(ux->path)? ux->path: "", | |
277 | sock_decode_type(ux->type)); | |
278 | return str; | |
279 | } | |
280 | ||
281 | static char *unix_get_type(struct sock_xinfo *sock_xinfo, | |
282 | struct sock *sock __attribute__((__unused__))) | |
283 | { | |
284 | const char *str; | |
285 | struct unix_xinfo *ux = (struct unix_xinfo *)sock_xinfo; | |
286 | ||
287 | str = sock_decode_type(ux->type); | |
288 | return strdup(str); | |
289 | } | |
290 | ||
291 | static char *unix_get_state(struct sock_xinfo *sock_xinfo, | |
292 | struct sock *sock __attribute__((__unused__))) | |
293 | { | |
294 | const char *str; | |
295 | struct unix_xinfo *ux = (struct unix_xinfo *)sock_xinfo; | |
296 | ||
297 | if (ux->acceptcon) | |
298 | return strdup("listen"); | |
299 | ||
300 | str = unix_decode_state(ux->st); | |
301 | return strdup(str); | |
302 | } | |
303 | ||
45d61bff MY |
304 | static bool unix_get_listening(struct sock_xinfo *sock_xinfo, |
305 | struct sock *sock __attribute__((__unused__))) | |
306 | { | |
307 | struct unix_xinfo *ux = (struct unix_xinfo *)sock_xinfo; | |
308 | ||
309 | return ux->acceptcon; | |
310 | } | |
311 | ||
2e38e61c MY |
312 | static bool unix_fill_column(struct proc *proc __attribute__((__unused__)), |
313 | struct sock_xinfo *sock_xinfo, | |
314 | struct sock *sock __attribute__((__unused__)), | |
315 | struct libscols_line *ln __attribute__((__unused__)), | |
316 | int column_id, | |
317 | size_t column_index __attribute__((__unused__)), | |
318 | char **str) | |
319 | { | |
320 | struct unix_xinfo *ux = (struct unix_xinfo *)sock_xinfo; | |
321 | ||
322 | switch(column_id) { | |
323 | case COL_UNIX_PATH: | |
324 | if (*ux->path) { | |
325 | *str = strdup(ux->path); | |
326 | return true; | |
327 | } | |
328 | break; | |
329 | } | |
330 | ||
331 | return false; | |
332 | } | |
333 | ||
334 | static struct sock_xinfo_class unix_xinfo_class = { | |
335 | .class = "unix", | |
336 | .get_name = unix_get_name, | |
337 | .get_type = unix_get_type, | |
338 | .get_state = unix_get_state, | |
45d61bff | 339 | .get_listening = unix_get_listening, |
2e38e61c MY |
340 | .fill_column = unix_fill_column, |
341 | .free = NULL, | |
342 | }; | |
343 | ||
344 | /* #define UNIX_LINE_LEN 54 + 21 + UNIX_LINE_LEN + 1 */ | |
345 | #define UNIX_LINE_LEN 256 | |
346 | static void load_xinfo_from_proc_unix(ino_t netns_inode) | |
347 | { | |
348 | char line[UNIX_LINE_LEN]; | |
349 | FILE *unix_fp; | |
350 | ||
351 | unix_fp = fopen("/proc/net/unix", "r"); | |
352 | if (!unix_fp) | |
353 | return; | |
354 | ||
355 | if (fgets(line, sizeof(line), unix_fp) == NULL) | |
356 | goto out; | |
b3649945 | 357 | if (!(line[0] == 'N' && line[1] == 'u' && line[2] == 'm')) |
2e38e61c MY |
358 | /* Unexpected line */ |
359 | goto out; | |
360 | ||
361 | while (fgets(line, sizeof(line), unix_fp)) { | |
362 | uint64_t flags; | |
363 | uint32_t type; | |
364 | unsigned int st; | |
365 | unsigned long inode; | |
366 | char path[1 + UNIX_PATH_MAX +1]; | |
367 | struct unix_xinfo *ux; | |
368 | ||
369 | memset(path, 0, sizeof(path)); | |
370 | if (sscanf(line, "%*x: %*x %*x %lx %x %x %lu %s", | |
371 | &flags, &type, &st, &inode, path) < 4) | |
372 | continue; | |
373 | ||
374 | if (inode == 0) | |
375 | continue; | |
376 | ||
377 | ux = xmalloc(sizeof(struct unix_xinfo)); | |
378 | ux->sock.class = &unix_xinfo_class; | |
379 | ux->sock.inode = (ino_t)inode; | |
380 | ux->sock.netns_inode = netns_inode; | |
381 | ||
382 | ux->acceptcon = !!flags; | |
383 | ux->type = type; | |
384 | ux->st = st; | |
385 | strcpy(ux->path, path); | |
386 | ||
387 | add_sock_info((struct sock_xinfo *)ux); | |
388 | } | |
389 | ||
390 | out: | |
391 | fclose(unix_fp); | |
392 | } | |
7b2a9be0 MY |
393 | |
394 | /* | |
395 | * AF_INET | |
396 | */ | |
397 | struct inet_xinfo { | |
398 | struct sock_xinfo sock; | |
399 | uint32_t local_addr; | |
400 | uint32_t remote_addr; | |
401 | }; | |
402 | ||
403 | static bool inet_fill_column(struct proc *proc __attribute__((__unused__)), | |
404 | struct inet_xinfo *inet, | |
405 | struct sock *sock __attribute__((__unused__)), | |
406 | struct libscols_line *ln __attribute__((__unused__)), | |
407 | int column_id, | |
408 | size_t column_index __attribute__((__unused__)), | |
409 | char **str) | |
410 | { | |
411 | struct in_addr n; | |
412 | struct in_addr *nptr = NULL; | |
413 | char s[INET_ADDRSTRLEN]; | |
414 | ||
415 | switch(column_id) { | |
416 | case COL_INET_LADDR: | |
417 | n.s_addr = inet->local_addr; | |
418 | nptr = &n; | |
419 | break; | |
420 | case COL_INET_RADDR: | |
421 | n.s_addr = inet->remote_addr; | |
422 | nptr = &n; | |
423 | break; | |
424 | default: | |
425 | return false; | |
426 | } | |
427 | ||
428 | if (nptr && inet_ntop(AF_INET, &n, s, sizeof(s))) { | |
429 | *str = strdup(s); | |
430 | return true; | |
431 | } | |
432 | return false; | |
433 | } | |
434 | ||
435 | /* | |
436 | * TCP | |
437 | */ | |
438 | struct tcp_xinfo { | |
439 | struct inet_xinfo inet; | |
440 | uint16_t local_port; | |
441 | uint16_t remote_port; | |
442 | unsigned int st; | |
443 | }; | |
444 | ||
445 | enum tcp_state { | |
446 | /* | |
447 | * Taken from linux/include/net/tcp_states.h. | |
448 | * (GPL-2.0-or-later) | |
449 | */ | |
450 | TCP_ESTABLISHED = 1, | |
451 | TCP_SYN_SENT, | |
452 | TCP_SYN_RECV, | |
453 | TCP_FIN_WAIT1, | |
454 | TCP_FIN_WAIT2, | |
455 | TCP_TIME_WAIT, | |
456 | TCP_CLOSE, | |
457 | TCP_CLOSE_WAIT, | |
458 | TCP_LAST_ACK, | |
459 | TCP_LISTEN, | |
460 | TCP_CLOSING, | |
461 | TCP_NEW_SYN_RECV, | |
462 | ||
463 | TCP_MAX_STATES /* Leave at the end! */ | |
464 | }; | |
465 | ||
466 | static const char *tcp_decode_state(unsigned int st) | |
467 | { | |
468 | const char * table [] = { | |
469 | [TCP_ESTABLISHED] = "established", | |
470 | [TCP_SYN_SENT] = "syn-sent", | |
471 | [TCP_SYN_RECV] = "syn-recv", | |
472 | [TCP_FIN_WAIT1] = "fin-wait1", | |
473 | [TCP_FIN_WAIT2] = "fin-wait2", | |
474 | [TCP_TIME_WAIT] = "time-wait", | |
475 | [TCP_CLOSE] = "close", | |
476 | [TCP_CLOSE_WAIT] = "close-wait", | |
477 | [TCP_LAST_ACK] = "last-ack", | |
478 | [TCP_LISTEN] = "listen", | |
479 | [TCP_CLOSING] = "closing", | |
480 | [TCP_NEW_SYN_RECV] = "new-syn-recv", | |
481 | }; | |
482 | ||
483 | if (st < TCP_MAX_STATES) | |
484 | return table[st]; | |
485 | return "unknown"; | |
486 | } | |
487 | ||
488 | static char *tcp_get_name(struct sock_xinfo *sock_xinfo, | |
489 | struct sock *sock __attribute__((__unused__))) | |
490 | { | |
491 | char *str = NULL; | |
492 | struct inet_xinfo *inet = ((struct inet_xinfo *)sock_xinfo); | |
493 | struct tcp_xinfo *tcp = ((struct tcp_xinfo *)sock_xinfo); | |
494 | struct in_addr local_n, remote_n; | |
495 | char local_s[INET_ADDRSTRLEN], remote_s[INET_ADDRSTRLEN]; | |
496 | ||
497 | local_n.s_addr = inet->local_addr; | |
498 | remote_n.s_addr = inet->remote_addr; | |
499 | if (!inet_ntop(AF_INET, &local_n, local_s, sizeof(local_s))) | |
500 | xasprintf(&str, "state=%s", tcp_decode_state(tcp->st)); | |
501 | else if (tcp->st == TCP_LISTEN | |
502 | || !inet_ntop(AF_INET, &remote_n, remote_s, sizeof(remote_s))) | |
503 | xasprintf(&str, "state=%s laddr=%s:%u", | |
504 | tcp_decode_state(tcp->st), | |
505 | local_s, tcp->local_port); | |
506 | else | |
507 | xasprintf(&str, "state=%s laddr=%s:%u raddr=%s:%u", | |
508 | tcp_decode_state(tcp->st), | |
509 | local_s, tcp->local_port, | |
510 | remote_s, tcp->remote_port); | |
511 | return str; | |
512 | } | |
513 | ||
514 | static char *tcp_get_type(struct sock_xinfo *sock_xinfo __attribute__((__unused__)), | |
515 | struct sock *sock __attribute__((__unused__))) | |
516 | { | |
517 | return strdup("stream"); | |
518 | } | |
519 | ||
520 | static char *tcp_get_state(struct sock_xinfo *sock_xinfo, | |
521 | struct sock *sock __attribute__((__unused__))) | |
522 | { | |
523 | struct tcp_xinfo *tcp = (struct tcp_xinfo *)sock_xinfo; | |
524 | ||
525 | return strdup(tcp_decode_state(tcp->st)); | |
526 | } | |
527 | ||
528 | static bool tcp_get_listening(struct sock_xinfo *sock_xinfo, | |
529 | struct sock *sock __attribute__((__unused__))) | |
530 | { | |
531 | struct tcp_xinfo *tcp = (struct tcp_xinfo *)sock_xinfo; | |
532 | return tcp->st == TCP_LISTEN; | |
533 | } | |
534 | ||
535 | static bool tcp_fill_column(struct proc *proc, | |
536 | struct sock_xinfo *sock_xinfo, | |
537 | struct sock *sock, | |
538 | struct libscols_line *ln, | |
539 | int column_id, | |
540 | size_t column_index, | |
541 | char **str) | |
542 | { | |
543 | struct tcp_xinfo *tcp = (struct tcp_xinfo *)sock_xinfo; | |
544 | struct inet_xinfo *inet = (struct inet_xinfo *)sock_xinfo; | |
545 | struct in_addr n; | |
546 | bool has_laddr = false; | |
547 | char s[INET_ADDRSTRLEN]; | |
548 | unsigned int p; | |
549 | bool has_lport = false; | |
550 | ||
551 | if (inet_fill_column(proc, (struct inet_xinfo *)sock_xinfo, sock, ln, | |
552 | column_id, column_index, str)) | |
553 | return true; | |
554 | ||
555 | switch(column_id) { | |
556 | case COL_TCP_LADDR: | |
557 | n.s_addr = inet->local_addr; | |
558 | has_laddr = true; | |
559 | p = (unsigned int)tcp->local_port; | |
560 | /* FALL THROUGH */ | |
561 | case COL_TCP_RADDR: | |
562 | if (!has_laddr) { | |
563 | n.s_addr = inet->remote_addr; | |
564 | p = (unsigned int)tcp->remote_port; | |
565 | } | |
566 | if (inet_ntop(AF_INET, &n, s, sizeof(s))) | |
567 | xasprintf(str, "%s:%u", s, p); | |
568 | break; | |
569 | case COL_TCP_LPORT: | |
570 | p = (unsigned int)tcp->local_port; | |
571 | has_lport = true; | |
572 | /* FALL THROUGH */ | |
573 | case COL_TCP_RPORT: | |
574 | if (!has_lport) | |
575 | p = (unsigned int)tcp->remote_port; | |
576 | xasprintf(str, "%u", p); | |
577 | break; | |
578 | default: | |
579 | return false; | |
580 | } | |
581 | ||
582 | return true; | |
583 | } | |
584 | ||
585 | static struct sock_xinfo_class tcp_xinfo_class = { | |
586 | .class = "tcp", | |
587 | .get_name = tcp_get_name, | |
588 | .get_type = tcp_get_type, | |
589 | .get_state = tcp_get_state, | |
590 | .get_listening = tcp_get_listening, | |
591 | .fill_column = tcp_fill_column, | |
592 | .free = NULL, | |
593 | }; | |
594 | ||
595 | #define TCP_LINE_LEN 256 | |
596 | static void load_xinfo_from_proc_tcp(ino_t netns_inode) | |
597 | { | |
598 | char line[TCP_LINE_LEN]; | |
599 | FILE *tcp_fp; | |
600 | ||
601 | tcp_fp = fopen("/proc/net/tcp", "r"); | |
602 | if (!tcp_fp) | |
603 | return; | |
604 | ||
605 | if (fgets(line, sizeof(line), tcp_fp) == NULL) | |
606 | goto out; | |
607 | if (!(line[0] == ' ' && line[1] == ' ' | |
608 | && line[2] == 's' && line[3] == 'l')) | |
609 | /* Unexpected line */ | |
610 | goto out; | |
611 | ||
612 | while (fgets(line, sizeof(line), tcp_fp)) { | |
613 | unsigned long local_addr; | |
614 | unsigned long local_port; | |
615 | unsigned long remote_addr; | |
616 | unsigned long remote_port; | |
617 | unsigned long st; | |
618 | unsigned long long inode; | |
619 | struct tcp_xinfo *tcp; | |
620 | struct inet_xinfo *inet; | |
621 | struct sock_xinfo *sock; | |
622 | ||
623 | if (sscanf(line, "%*d: %lx:%lx %lx:%lx %lx %*x:%*x %*x:%*x %*x %*u %*u %lld", | |
624 | &local_addr, &local_port, &remote_addr, &remote_port, | |
625 | &st, &inode) != 6) | |
626 | continue; | |
627 | ||
628 | if (inode == 0) | |
629 | continue; | |
630 | ||
631 | tcp = xmalloc(sizeof(struct tcp_xinfo)); | |
632 | inet = (struct inet_xinfo *)tcp; | |
633 | sock = (struct sock_xinfo *)inet; | |
634 | sock->class = &tcp_xinfo_class; | |
635 | sock->inode = (ino_t)inode; | |
636 | sock->netns_inode = netns_inode; | |
637 | inet->local_addr = local_addr; | |
638 | tcp->local_port = local_port; | |
639 | inet->remote_addr = remote_addr; | |
640 | tcp->remote_port = remote_port; | |
641 | tcp->st = st; | |
642 | ||
643 | add_sock_info(sock); | |
644 | } | |
645 | ||
646 | out: | |
647 | fclose(tcp_fp); | |
648 | } |