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Commit | Line | Data |
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ad02a0eb SH |
1 | /* |
2 | * libnetlink.c RTnetlink service routines. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
16 | #include <syslog.h> | |
17 | #include <fcntl.h> | |
18 | #include <net/if_arp.h> | |
19 | #include <sys/socket.h> | |
20 | #include <netinet/in.h> | |
21 | #include <string.h> | |
22 | #include <errno.h> | |
23 | #include <time.h> | |
24 | #include <sys/uio.h> | |
25 | ||
26 | #include "libnetlink.h" | |
27 | ||
28 | void rtnl_close(struct rtnl_handle *rth) | |
29 | { | |
30 | close(rth->fd); | |
31 | } | |
32 | ||
33 | int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, | |
34 | int protocol) | |
35 | { | |
36 | socklen_t addr_len; | |
37 | int sndbuf = 32768; | |
38 | int rcvbuf = 32768; | |
39 | ||
40 | memset(rth, 0, sizeof(rth)); | |
41 | ||
42 | rth->fd = socket(AF_NETLINK, SOCK_RAW, protocol); | |
43 | if (rth->fd < 0) { | |
44 | perror("Cannot open netlink socket"); | |
45 | return -1; | |
46 | } | |
47 | ||
48 | if (setsockopt(rth->fd,SOL_SOCKET,SO_SNDBUF,&sndbuf,sizeof(sndbuf)) < 0) { | |
49 | perror("SO_SNDBUF"); | |
50 | return -1; | |
51 | } | |
52 | ||
53 | if (setsockopt(rth->fd,SOL_SOCKET,SO_RCVBUF,&rcvbuf,sizeof(rcvbuf)) < 0) { | |
54 | perror("SO_RCVBUF"); | |
55 | return -1; | |
56 | } | |
57 | ||
58 | memset(&rth->local, 0, sizeof(rth->local)); | |
59 | rth->local.nl_family = AF_NETLINK; | |
60 | rth->local.nl_groups = subscriptions; | |
61 | ||
62 | if (bind(rth->fd, (struct sockaddr*)&rth->local, sizeof(rth->local)) < 0) { | |
63 | perror("Cannot bind netlink socket"); | |
64 | return -1; | |
65 | } | |
66 | addr_len = sizeof(rth->local); | |
67 | if (getsockname(rth->fd, (struct sockaddr*)&rth->local, &addr_len) < 0) { | |
68 | perror("Cannot getsockname"); | |
69 | return -1; | |
70 | } | |
71 | if (addr_len != sizeof(rth->local)) { | |
72 | fprintf(stderr, "Wrong address length %d\n", addr_len); | |
73 | return -1; | |
74 | } | |
75 | if (rth->local.nl_family != AF_NETLINK) { | |
76 | fprintf(stderr, "Wrong address family %d\n", rth->local.nl_family); | |
77 | return -1; | |
78 | } | |
79 | rth->seq = time(NULL); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions) | |
84 | { | |
85 | return rtnl_open_byproto(rth, subscriptions, NETLINK_ROUTE); | |
86 | } | |
87 | ||
88 | int rtnl_wilddump_request(struct rtnl_handle *rth, int family, int type) | |
89 | { | |
90 | struct { | |
91 | struct nlmsghdr nlh; | |
92 | struct rtgenmsg g; | |
93 | } req; | |
94 | struct sockaddr_nl nladdr; | |
95 | ||
96 | memset(&nladdr, 0, sizeof(nladdr)); | |
97 | nladdr.nl_family = AF_NETLINK; | |
98 | ||
99 | memset(&req, 0, sizeof(req)); | |
100 | req.nlh.nlmsg_len = sizeof(req); | |
101 | req.nlh.nlmsg_type = type; | |
102 | req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST; | |
103 | req.nlh.nlmsg_pid = 0; | |
104 | req.nlh.nlmsg_seq = rth->dump = ++rth->seq; | |
105 | req.g.rtgen_family = family; | |
106 | ||
107 | return sendto(rth->fd, (void*)&req, sizeof(req), 0, | |
108 | (struct sockaddr*)&nladdr, sizeof(nladdr)); | |
109 | } | |
110 | ||
111 | int rtnl_send(struct rtnl_handle *rth, const char *buf, int len) | |
112 | { | |
113 | struct sockaddr_nl nladdr; | |
114 | ||
115 | memset(&nladdr, 0, sizeof(nladdr)); | |
116 | nladdr.nl_family = AF_NETLINK; | |
117 | ||
118 | return sendto(rth->fd, buf, len, 0, (struct sockaddr*)&nladdr, sizeof(nladdr)); | |
119 | } | |
120 | ||
121 | int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len) | |
122 | { | |
123 | struct nlmsghdr nlh; | |
124 | struct sockaddr_nl nladdr; | |
125 | struct iovec iov[2] = { | |
126 | { .iov_base = &nlh, .iov_len = sizeof(nlh) }, | |
127 | { .iov_base = req, .iov_len = len } | |
128 | }; | |
129 | struct msghdr msg = { | |
130 | .msg_name = &nladdr, | |
131 | .msg_namelen = sizeof(nladdr), | |
132 | .msg_iov = iov, | |
133 | .msg_iovlen = 2, | |
134 | }; | |
135 | ||
136 | memset(&nladdr, 0, sizeof(nladdr)); | |
137 | nladdr.nl_family = AF_NETLINK; | |
138 | ||
139 | nlh.nlmsg_len = NLMSG_LENGTH(len); | |
140 | nlh.nlmsg_type = type; | |
141 | nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST; | |
142 | nlh.nlmsg_pid = 0; | |
143 | nlh.nlmsg_seq = rth->dump = ++rth->seq; | |
144 | ||
145 | return sendmsg(rth->fd, &msg, 0); | |
146 | } | |
147 | ||
148 | int rtnl_dump_filter(struct rtnl_handle *rth, | |
149 | rtnl_filter_t filter, | |
150 | void *arg1, | |
151 | rtnl_filter_t junk, | |
152 | void *arg2) | |
153 | { | |
154 | struct sockaddr_nl nladdr; | |
155 | struct iovec iov; | |
156 | struct msghdr msg = { | |
157 | .msg_name = &nladdr, | |
158 | .msg_namelen = sizeof(nladdr), | |
159 | .msg_iov = &iov, | |
160 | .msg_iovlen = 1, | |
161 | }; | |
162 | char buf[16384]; | |
163 | ||
164 | iov.iov_base = buf; | |
165 | while (1) { | |
166 | int status; | |
167 | struct nlmsghdr *h; | |
168 | ||
169 | iov.iov_len = sizeof(buf); | |
170 | status = recvmsg(rth->fd, &msg, 0); | |
171 | ||
172 | if (status < 0) { | |
173 | if (errno == EINTR) | |
174 | continue; | |
175 | perror("OVERRUN"); | |
176 | continue; | |
177 | } | |
178 | ||
179 | if (status == 0) { | |
180 | fprintf(stderr, "EOF on netlink\n"); | |
181 | return -1; | |
182 | } | |
183 | ||
184 | h = (struct nlmsghdr*)buf; | |
185 | while (NLMSG_OK(h, status)) { | |
186 | int err; | |
187 | ||
188 | if (nladdr.nl_pid != 0 || | |
189 | h->nlmsg_pid != rth->local.nl_pid || | |
190 | h->nlmsg_seq != rth->dump) { | |
191 | if (junk) { | |
192 | err = junk(&nladdr, h, arg2); | |
193 | if (err < 0) | |
194 | return err; | |
195 | } | |
196 | goto skip_it; | |
197 | } | |
198 | ||
199 | if (h->nlmsg_type == NLMSG_DONE) | |
200 | return 0; | |
201 | if (h->nlmsg_type == NLMSG_ERROR) { | |
202 | struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h); | |
203 | if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) { | |
204 | fprintf(stderr, "ERROR truncated\n"); | |
205 | } else { | |
206 | errno = -err->error; | |
207 | perror("RTNETLINK answers"); | |
208 | } | |
209 | return -1; | |
210 | } | |
211 | err = filter(&nladdr, h, arg1); | |
212 | if (err < 0) | |
213 | return err; | |
214 | ||
215 | skip_it: | |
216 | h = NLMSG_NEXT(h, status); | |
217 | } | |
218 | if (msg.msg_flags & MSG_TRUNC) { | |
219 | fprintf(stderr, "Message truncated\n"); | |
220 | continue; | |
221 | } | |
222 | if (status) { | |
223 | fprintf(stderr, "!!!Remnant of size %d\n", status); | |
224 | exit(1); | |
225 | } | |
226 | } | |
227 | } | |
228 | ||
229 | int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer, | |
230 | unsigned groups, struct nlmsghdr *answer, | |
231 | rtnl_filter_t junk, | |
232 | void *jarg) | |
233 | { | |
234 | int status; | |
235 | unsigned seq; | |
236 | struct nlmsghdr *h; | |
237 | struct sockaddr_nl nladdr; | |
238 | struct iovec iov = { | |
239 | .iov_base = (void*) n, | |
240 | .iov_len = n->nlmsg_len | |
241 | }; | |
242 | struct msghdr msg = { | |
243 | .msg_name = &nladdr, | |
244 | .msg_namelen = sizeof(nladdr), | |
245 | .msg_iov = &iov, | |
246 | .msg_iovlen = 1, | |
247 | }; | |
248 | char buf[16384]; | |
249 | ||
250 | memset(&nladdr, 0, sizeof(nladdr)); | |
251 | nladdr.nl_family = AF_NETLINK; | |
252 | nladdr.nl_pid = peer; | |
253 | nladdr.nl_groups = groups; | |
254 | ||
255 | n->nlmsg_seq = seq = ++rtnl->seq; | |
256 | ||
257 | if (answer == NULL) | |
258 | n->nlmsg_flags |= NLM_F_ACK; | |
259 | ||
260 | status = sendmsg(rtnl->fd, &msg, 0); | |
261 | ||
262 | if (status < 0) { | |
263 | perror("Cannot talk to rtnetlink"); | |
264 | return -1; | |
265 | } | |
266 | ||
267 | memset(buf,0,sizeof(buf)); | |
268 | ||
269 | iov.iov_base = buf; | |
270 | ||
271 | while (1) { | |
272 | iov.iov_len = sizeof(buf); | |
273 | status = recvmsg(rtnl->fd, &msg, 0); | |
274 | ||
275 | if (status < 0) { | |
276 | if (errno == EINTR) | |
277 | continue; | |
278 | perror("OVERRUN"); | |
279 | continue; | |
280 | } | |
281 | if (status == 0) { | |
282 | fprintf(stderr, "EOF on netlink\n"); | |
283 | return -1; | |
284 | } | |
285 | if (msg.msg_namelen != sizeof(nladdr)) { | |
286 | fprintf(stderr, "sender address length == %d\n", msg.msg_namelen); | |
287 | exit(1); | |
288 | } | |
289 | for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) { | |
290 | int err; | |
291 | int len = h->nlmsg_len; | |
292 | int l = len - sizeof(*h); | |
293 | ||
294 | if (l<0 || len>status) { | |
295 | if (msg.msg_flags & MSG_TRUNC) { | |
296 | fprintf(stderr, "Truncated message\n"); | |
297 | return -1; | |
298 | } | |
299 | fprintf(stderr, "!!!malformed message: len=%d\n", len); | |
300 | exit(1); | |
301 | } | |
302 | ||
303 | if (nladdr.nl_pid != peer || | |
304 | h->nlmsg_pid != rtnl->local.nl_pid || | |
305 | h->nlmsg_seq != seq) { | |
306 | if (junk) { | |
307 | err = junk(&nladdr, h, jarg); | |
308 | if (err < 0) | |
309 | return err; | |
310 | } | |
311 | /* Don't forget to skip that message. */ | |
312 | status -= NLMSG_ALIGN(len); | |
313 | h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len)); | |
314 | continue; | |
315 | } | |
316 | ||
317 | if (h->nlmsg_type == NLMSG_ERROR) { | |
318 | struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h); | |
319 | if (l < sizeof(struct nlmsgerr)) { | |
320 | fprintf(stderr, "ERROR truncated\n"); | |
321 | } else { | |
322 | errno = -err->error; | |
323 | if (errno == 0) { | |
324 | if (answer) | |
325 | memcpy(answer, h, h->nlmsg_len); | |
326 | return 0; | |
327 | } | |
328 | perror("RTNETLINK answers"); | |
329 | } | |
330 | return -1; | |
331 | } | |
332 | if (answer) { | |
333 | memcpy(answer, h, h->nlmsg_len); | |
334 | return 0; | |
335 | } | |
336 | ||
337 | fprintf(stderr, "Unexpected reply!!!\n"); | |
338 | ||
339 | status -= NLMSG_ALIGN(len); | |
340 | h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len)); | |
341 | } | |
342 | if (msg.msg_flags & MSG_TRUNC) { | |
343 | fprintf(stderr, "Message truncated\n"); | |
344 | continue; | |
345 | } | |
346 | if (status) { | |
347 | fprintf(stderr, "!!!Remnant of size %d\n", status); | |
348 | exit(1); | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
353 | int rtnl_listen(struct rtnl_handle *rtnl, | |
354 | rtnl_filter_t handler, | |
355 | void *jarg) | |
356 | { | |
357 | int status; | |
358 | struct nlmsghdr *h; | |
359 | struct sockaddr_nl nladdr; | |
360 | struct iovec iov; | |
361 | struct msghdr msg = { | |
362 | .msg_name = &nladdr, | |
363 | .msg_namelen = sizeof(nladdr), | |
364 | .msg_iov = &iov, | |
365 | .msg_iovlen = 1, | |
366 | }; | |
367 | char buf[8192]; | |
368 | ||
369 | memset(&nladdr, 0, sizeof(nladdr)); | |
370 | nladdr.nl_family = AF_NETLINK; | |
371 | nladdr.nl_pid = 0; | |
372 | nladdr.nl_groups = 0; | |
373 | ||
374 | iov.iov_base = buf; | |
375 | while (1) { | |
376 | iov.iov_len = sizeof(buf); | |
377 | status = recvmsg(rtnl->fd, &msg, 0); | |
378 | ||
379 | if (status < 0) { | |
380 | if (errno == EINTR) | |
381 | continue; | |
382 | if (errno == EAGAIN) | |
383 | return 0; | |
384 | perror("OVERRUN"); | |
385 | return -1; | |
386 | } | |
387 | if (status == 0) { | |
388 | fprintf(stderr, "EOF on netlink\n"); | |
389 | return -1; | |
390 | } | |
391 | if (msg.msg_namelen != sizeof(nladdr)) { | |
392 | fprintf(stderr, "Sender address length == %d\n", msg.msg_namelen); | |
393 | exit(1); | |
394 | } | |
395 | for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) { | |
396 | int err; | |
397 | int len = h->nlmsg_len; | |
398 | int l = len - sizeof(*h); | |
399 | ||
400 | if (l<0 || len>status) { | |
401 | if (msg.msg_flags & MSG_TRUNC) { | |
402 | fprintf(stderr, "Truncated message\n"); | |
403 | return -1; | |
404 | } | |
405 | fprintf(stderr, "!!!malformed message: len=%d\n", len); | |
406 | exit(1); | |
407 | } | |
408 | ||
409 | err = handler(&nladdr, h, jarg); | |
410 | if (err < 0) { | |
411 | fprintf(stderr, "Handler returned %d\n", err); | |
412 | return err; | |
413 | } | |
414 | ||
415 | status -= NLMSG_ALIGN(len); | |
416 | h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len)); | |
417 | } | |
418 | if (msg.msg_flags & MSG_TRUNC) { | |
419 | fprintf(stderr, "Message truncated\n"); | |
420 | continue; | |
421 | } | |
422 | if (status) { | |
423 | fprintf(stderr, "!!!Remnant of size %d\n", status); | |
424 | exit(1); | |
425 | } | |
426 | } | |
427 | } | |
428 | ||
429 | int rtnl_from_file(FILE *rtnl, rtnl_filter_t handler, | |
430 | void *jarg) | |
431 | { | |
432 | int status; | |
433 | struct sockaddr_nl nladdr; | |
434 | char buf[8192]; | |
435 | struct nlmsghdr *h = (void*)buf; | |
436 | ||
437 | memset(&nladdr, 0, sizeof(nladdr)); | |
438 | nladdr.nl_family = AF_NETLINK; | |
439 | nladdr.nl_pid = 0; | |
440 | nladdr.nl_groups = 0; | |
441 | ||
442 | while (1) { | |
443 | int err, len, type; | |
444 | int l; | |
445 | ||
446 | status = fread(&buf, 1, sizeof(*h), rtnl); | |
447 | ||
448 | if (status < 0) { | |
449 | if (errno == EINTR) | |
450 | continue; | |
451 | perror("rtnl_from_file: fread"); | |
452 | return -1; | |
453 | } | |
454 | if (status == 0) | |
455 | return 0; | |
456 | ||
457 | len = h->nlmsg_len; | |
458 | type= h->nlmsg_type; | |
459 | l = len - sizeof(*h); | |
460 | ||
461 | if (l<0 || len>sizeof(buf)) { | |
462 | fprintf(stderr, "!!!malformed message: len=%d @%lu\n", | |
463 | len, ftell(rtnl)); | |
464 | return -1; | |
465 | } | |
466 | ||
467 | status = fread(NLMSG_DATA(h), 1, NLMSG_ALIGN(l), rtnl); | |
468 | ||
469 | if (status < 0) { | |
470 | perror("rtnl_from_file: fread"); | |
471 | return -1; | |
472 | } | |
473 | if (status < l) { | |
474 | fprintf(stderr, "rtnl-from_file: truncated message\n"); | |
475 | return -1; | |
476 | } | |
477 | ||
478 | err = handler(&nladdr, h, jarg); | |
479 | if (err < 0) | |
480 | return err; | |
481 | } | |
482 | } | |
483 | ||
484 | int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data) | |
485 | { | |
486 | int len = RTA_LENGTH(4); | |
487 | struct rtattr *rta; | |
488 | if (NLMSG_ALIGN(n->nlmsg_len) + len > maxlen) { | |
489 | fprintf(stderr,"addattr32: Error! max allowed bound %d exceeded\n",maxlen); | |
490 | return -1; | |
491 | } | |
492 | rta = NLMSG_TAIL(n); | |
493 | rta->rta_type = type; | |
494 | rta->rta_len = len; | |
495 | memcpy(RTA_DATA(rta), &data, 4); | |
496 | n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + len; | |
497 | return 0; | |
498 | } | |
499 | ||
500 | int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data, | |
501 | int alen) | |
502 | { | |
503 | int len = RTA_LENGTH(alen); | |
504 | struct rtattr *rta; | |
505 | ||
506 | if (NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len) > maxlen) { | |
507 | fprintf(stderr, "addattr_l ERROR: message exceeded bound of %d\n",maxlen); | |
508 | return -1; | |
509 | } | |
510 | rta = NLMSG_TAIL(n); | |
511 | rta->rta_type = type; | |
512 | rta->rta_len = len; | |
513 | memcpy(RTA_DATA(rta), data, alen); | |
514 | n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len); | |
515 | return 0; | |
516 | } | |
517 | ||
518 | int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len) | |
519 | { | |
520 | if (NLMSG_ALIGN(n->nlmsg_len) + NLMSG_ALIGN(len) > maxlen) { | |
521 | fprintf(stderr, "addraw_l ERROR: message exceeded bound of %d\n",maxlen); | |
522 | return -1; | |
523 | } | |
524 | ||
525 | memcpy(NLMSG_TAIL(n), data, len); | |
526 | memset((void *) NLMSG_TAIL(n) + len, 0, NLMSG_ALIGN(len) - len); | |
527 | n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + NLMSG_ALIGN(len); | |
528 | return 0; | |
529 | } | |
530 | ||
531 | int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data) | |
532 | { | |
533 | int len = RTA_LENGTH(4); | |
534 | struct rtattr *subrta; | |
535 | ||
536 | if (RTA_ALIGN(rta->rta_len) + len > maxlen) { | |
537 | fprintf(stderr,"rta_addattr32: Error! max allowed bound %d exceeded\n",maxlen); | |
538 | return -1; | |
539 | } | |
540 | subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len)); | |
541 | subrta->rta_type = type; | |
542 | subrta->rta_len = len; | |
543 | memcpy(RTA_DATA(subrta), &data, 4); | |
544 | rta->rta_len = NLMSG_ALIGN(rta->rta_len) + len; | |
545 | return 0; | |
546 | } | |
547 | ||
548 | int rta_addattr_l(struct rtattr *rta, int maxlen, int type, | |
549 | const void *data, int alen) | |
550 | { | |
551 | struct rtattr *subrta; | |
552 | int len = RTA_LENGTH(alen); | |
553 | ||
554 | if (RTA_ALIGN(rta->rta_len) + RTA_ALIGN(len) > maxlen) { | |
555 | fprintf(stderr,"rta_addattr_l: Error! max allowed bound %d exceeded\n",maxlen); | |
556 | return -1; | |
557 | } | |
558 | subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len)); | |
559 | subrta->rta_type = type; | |
560 | subrta->rta_len = len; | |
561 | memcpy(RTA_DATA(subrta), data, alen); | |
562 | rta->rta_len = NLMSG_ALIGN(rta->rta_len) + RTA_ALIGN(len); | |
563 | return 0; | |
564 | } | |
565 | ||
566 | int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len) | |
567 | { | |
568 | memset(tb, 0, sizeof(struct rtattr *) * (max + 1)); | |
569 | while (RTA_OK(rta, len)) { | |
570 | if (rta->rta_type <= max) | |
571 | tb[rta->rta_type] = rta; | |
572 | rta = RTA_NEXT(rta,len); | |
573 | } | |
574 | if (len) | |
575 | fprintf(stderr, "!!!Deficit %d, rta_len=%d\n", len, rta->rta_len); | |
576 | return 0; | |
577 | } | |
578 | ||
579 | int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len) | |
580 | { | |
581 | int i = 0; | |
582 | ||
583 | memset(tb, 0, sizeof(struct rtattr *) * max); | |
584 | while (RTA_OK(rta, len)) { | |
585 | if (rta->rta_type <= max && i < max) | |
586 | tb[i++] = rta; | |
587 | rta = RTA_NEXT(rta,len); | |
588 | } | |
589 | if (len) | |
590 | fprintf(stderr, "!!!Deficit %d, rta_len=%d\n", len, rta->rta_len); | |
591 | return i; | |
592 | } |