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aba5acdf SH |
1 | /* |
2 | * iptunnel.c "ip tunnel" | |
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 | * Changes: | |
13 | * | |
14 | * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses | |
15 | * Rani Assaf <rani@magic.metawire.com> 980930: do not allow key for ipip/sit | |
16 | * Phil Karn <karn@ka9q.ampr.org> 990408: "pmtudisc" flag | |
17 | */ | |
18 | ||
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <unistd.h> | |
23 | #include <syslog.h> | |
24 | #include <fcntl.h> | |
25 | #include <sys/socket.h> | |
26 | #include <sys/ioctl.h> | |
27 | #include <linux/if.h> | |
28 | #include <linux/if_arp.h> | |
29 | #include <netinet/in.h> | |
30 | #include <netinet/ip.h> | |
31 | #include <arpa/inet.h> | |
32 | #include <linux/if_tunnel.h> | |
33 | ||
34 | #include "rt_names.h" | |
35 | #include "utils.h" | |
36 | ||
37 | static void usage(void) __attribute__((noreturn)); | |
38 | ||
39 | static void usage(void) | |
40 | { | |
41 | fprintf(stderr, "Usage: ip tunnel { add | change | del | show } [ NAME ]\n"); | |
42 | fprintf(stderr, " [ mode { ipip | gre | sit } ] [ remote ADDR ] [ local ADDR ]\n"); | |
43 | fprintf(stderr, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n"); | |
44 | fprintf(stderr, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n"); | |
45 | fprintf(stderr, "\n"); | |
46 | fprintf(stderr, "Where: NAME := STRING\n"); | |
47 | fprintf(stderr, " ADDR := { IP_ADDRESS | any }\n"); | |
48 | fprintf(stderr, " TOS := { NUMBER | inherit }\n"); | |
49 | fprintf(stderr, " TTL := { 1..255 | inherit }\n"); | |
50 | fprintf(stderr, " KEY := { DOTTED_QUAD | NUMBER }\n"); | |
51 | exit(-1); | |
52 | } | |
53 | ||
54 | static int do_ioctl_get_ifindex(char *dev) | |
55 | { | |
56 | struct ifreq ifr; | |
57 | int fd; | |
58 | int err; | |
59 | ||
60 | strcpy(ifr.ifr_name, dev); | |
61 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
62 | err = ioctl(fd, SIOCGIFINDEX, &ifr); | |
63 | if (err) { | |
64 | perror("ioctl"); | |
65 | return 0; | |
66 | } | |
67 | close(fd); | |
68 | return ifr.ifr_ifindex; | |
69 | } | |
70 | ||
71 | static int do_ioctl_get_iftype(char *dev) | |
72 | { | |
73 | struct ifreq ifr; | |
74 | int fd; | |
75 | int err; | |
76 | ||
77 | strcpy(ifr.ifr_name, dev); | |
78 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
79 | err = ioctl(fd, SIOCGIFHWADDR, &ifr); | |
80 | if (err) { | |
81 | perror("ioctl"); | |
82 | return -1; | |
83 | } | |
84 | close(fd); | |
85 | return ifr.ifr_addr.sa_family; | |
86 | } | |
87 | ||
88 | ||
89 | static char * do_ioctl_get_ifname(int idx) | |
90 | { | |
91 | static struct ifreq ifr; | |
92 | int fd; | |
93 | int err; | |
94 | ||
95 | ifr.ifr_ifindex = idx; | |
96 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
97 | err = ioctl(fd, SIOCGIFNAME, &ifr); | |
98 | if (err) { | |
99 | perror("ioctl"); | |
100 | return NULL; | |
101 | } | |
102 | close(fd); | |
103 | return ifr.ifr_name; | |
104 | } | |
105 | ||
106 | ||
107 | ||
108 | static int do_get_ioctl(char *basedev, struct ip_tunnel_parm *p) | |
109 | { | |
110 | struct ifreq ifr; | |
111 | int fd; | |
112 | int err; | |
113 | ||
114 | strcpy(ifr.ifr_name, basedev); | |
115 | ifr.ifr_ifru.ifru_data = (void*)p; | |
116 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
117 | err = ioctl(fd, SIOCGETTUNNEL, &ifr); | |
118 | if (err) | |
119 | perror("ioctl"); | |
120 | close(fd); | |
121 | return err; | |
122 | } | |
123 | ||
124 | static int do_add_ioctl(int cmd, char *basedev, struct ip_tunnel_parm *p) | |
125 | { | |
126 | struct ifreq ifr; | |
127 | int fd; | |
128 | int err; | |
129 | ||
130 | if (cmd == SIOCCHGTUNNEL && p->name[0]) | |
131 | strcpy(ifr.ifr_name, p->name); | |
132 | else | |
133 | strcpy(ifr.ifr_name, basedev); | |
134 | ifr.ifr_ifru.ifru_data = (void*)p; | |
135 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
136 | err = ioctl(fd, cmd, &ifr); | |
137 | if (err) | |
138 | perror("ioctl"); | |
139 | close(fd); | |
140 | return err; | |
141 | } | |
142 | ||
143 | static int do_del_ioctl(char *basedev, struct ip_tunnel_parm *p) | |
144 | { | |
145 | struct ifreq ifr; | |
146 | int fd; | |
147 | int err; | |
148 | ||
149 | if (p->name[0]) | |
150 | strcpy(ifr.ifr_name, p->name); | |
151 | else | |
152 | strcpy(ifr.ifr_name, basedev); | |
153 | ifr.ifr_ifru.ifru_data = (void*)p; | |
154 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
155 | err = ioctl(fd, SIOCDELTUNNEL, &ifr); | |
156 | if (err) | |
157 | perror("ioctl"); | |
158 | close(fd); | |
159 | return err; | |
160 | } | |
161 | ||
162 | static int parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p) | |
163 | { | |
164 | int count = 0; | |
165 | char medium[IFNAMSIZ]; | |
166 | ||
167 | memset(p, 0, sizeof(*p)); | |
168 | memset(&medium, 0, sizeof(medium)); | |
169 | ||
170 | p->iph.version = 4; | |
171 | p->iph.ihl = 5; | |
172 | #ifndef IP_DF | |
173 | #define IP_DF 0x4000 /* Flag: "Don't Fragment" */ | |
174 | #endif | |
175 | p->iph.frag_off = htons(IP_DF); | |
176 | ||
177 | while (argc > 0) { | |
178 | if (strcmp(*argv, "mode") == 0) { | |
179 | NEXT_ARG(); | |
180 | if (strcmp(*argv, "ipip") == 0 || | |
181 | strcmp(*argv, "ip/ip") == 0) { | |
182 | if (p->iph.protocol && p->iph.protocol != IPPROTO_IPIP) { | |
183 | fprintf(stderr,"You managed to ask for more than one tunnel mode.\n"); | |
184 | exit(-1); | |
185 | } | |
186 | p->iph.protocol = IPPROTO_IPIP; | |
187 | } else if (strcmp(*argv, "gre") == 0 || | |
188 | strcmp(*argv, "gre/ip") == 0) { | |
189 | if (p->iph.protocol && p->iph.protocol != IPPROTO_GRE) { | |
190 | fprintf(stderr,"You managed to ask for more than one tunnel mode.\n"); | |
191 | exit(-1); | |
192 | } | |
193 | p->iph.protocol = IPPROTO_GRE; | |
194 | } else if (strcmp(*argv, "sit") == 0 || | |
195 | strcmp(*argv, "ipv6/ip") == 0) { | |
196 | if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) { | |
197 | fprintf(stderr,"You managed to ask for more than one tunnel mode.\n"); | |
198 | exit(-1); | |
199 | } | |
200 | p->iph.protocol = IPPROTO_IPV6; | |
201 | } else { | |
202 | fprintf(stderr,"Cannot guess tunnel mode.\n"); | |
203 | exit(-1); | |
204 | } | |
205 | } else if (strcmp(*argv, "key") == 0) { | |
206 | unsigned uval; | |
207 | NEXT_ARG(); | |
208 | p->i_flags |= GRE_KEY; | |
209 | p->o_flags |= GRE_KEY; | |
210 | if (strchr(*argv, '.')) | |
211 | p->i_key = p->o_key = get_addr32(*argv); | |
212 | else { | |
213 | if (get_unsigned(&uval, *argv, 0)<0) { | |
214 | fprintf(stderr, "invalid value of \"key\"\n"); | |
215 | exit(-1); | |
216 | } | |
217 | p->i_key = p->o_key = htonl(uval); | |
218 | } | |
219 | } else if (strcmp(*argv, "ikey") == 0) { | |
220 | unsigned uval; | |
221 | NEXT_ARG(); | |
222 | p->i_flags |= GRE_KEY; | |
223 | if (strchr(*argv, '.')) | |
224 | p->o_key = get_addr32(*argv); | |
225 | else { | |
226 | if (get_unsigned(&uval, *argv, 0)<0) { | |
227 | fprintf(stderr, "invalid value of \"ikey\"\n"); | |
228 | exit(-1); | |
229 | } | |
230 | p->i_key = htonl(uval); | |
231 | } | |
232 | } else if (strcmp(*argv, "okey") == 0) { | |
233 | unsigned uval; | |
234 | NEXT_ARG(); | |
235 | p->o_flags |= GRE_KEY; | |
236 | if (strchr(*argv, '.')) | |
237 | p->o_key = get_addr32(*argv); | |
238 | else { | |
239 | if (get_unsigned(&uval, *argv, 0)<0) { | |
240 | fprintf(stderr, "invalid value of \"okey\"\n"); | |
241 | exit(-1); | |
242 | } | |
243 | p->o_key = htonl(uval); | |
244 | } | |
245 | } else if (strcmp(*argv, "seq") == 0) { | |
246 | p->i_flags |= GRE_SEQ; | |
247 | p->o_flags |= GRE_SEQ; | |
248 | } else if (strcmp(*argv, "iseq") == 0) { | |
249 | p->i_flags |= GRE_SEQ; | |
250 | } else if (strcmp(*argv, "oseq") == 0) { | |
251 | p->o_flags |= GRE_SEQ; | |
252 | } else if (strcmp(*argv, "csum") == 0) { | |
253 | p->i_flags |= GRE_CSUM; | |
254 | p->o_flags |= GRE_CSUM; | |
255 | } else if (strcmp(*argv, "icsum") == 0) { | |
256 | p->i_flags |= GRE_CSUM; | |
257 | } else if (strcmp(*argv, "ocsum") == 0) { | |
258 | p->o_flags |= GRE_CSUM; | |
259 | } else if (strcmp(*argv, "nopmtudisc") == 0) { | |
260 | p->iph.frag_off = 0; | |
261 | } else if (strcmp(*argv, "pmtudisc") == 0) { | |
262 | p->iph.frag_off = htons(IP_DF); | |
263 | } else if (strcmp(*argv, "remote") == 0) { | |
264 | NEXT_ARG(); | |
265 | if (strcmp(*argv, "any")) | |
266 | p->iph.daddr = get_addr32(*argv); | |
267 | } else if (strcmp(*argv, "local") == 0) { | |
268 | NEXT_ARG(); | |
269 | if (strcmp(*argv, "any")) | |
270 | p->iph.saddr = get_addr32(*argv); | |
271 | } else if (strcmp(*argv, "dev") == 0) { | |
272 | NEXT_ARG(); | |
273 | strncpy(medium, *argv, IFNAMSIZ-1); | |
274 | } else if (strcmp(*argv, "ttl") == 0) { | |
275 | unsigned uval; | |
276 | NEXT_ARG(); | |
277 | if (strcmp(*argv, "inherit") != 0) { | |
278 | if (get_unsigned(&uval, *argv, 0)) | |
279 | invarg("invalid TTL\n", *argv); | |
280 | if (uval > 255) | |
281 | invarg("TTL must be <=255\n", *argv); | |
282 | p->iph.ttl = uval; | |
283 | } | |
284 | } else if (strcmp(*argv, "tos") == 0 || | |
285 | matches(*argv, "dsfield") == 0) { | |
286 | __u32 uval; | |
287 | NEXT_ARG(); | |
288 | if (strcmp(*argv, "inherit") != 0) { | |
289 | if (rtnl_dsfield_a2n(&uval, *argv)) | |
290 | invarg("bad TOS value", *argv); | |
291 | p->iph.tos = uval; | |
292 | } else | |
293 | p->iph.tos = 1; | |
294 | } else { | |
295 | if (strcmp(*argv, "name") == 0) { | |
296 | NEXT_ARG(); | |
297 | } | |
298 | if (matches(*argv, "help") == 0) | |
299 | usage(); | |
300 | if (p->name[0]) | |
301 | duparg2("name", *argv); | |
302 | strncpy(p->name, *argv, IFNAMSIZ); | |
303 | if (cmd == SIOCCHGTUNNEL && count == 0) { | |
304 | struct ip_tunnel_parm old_p; | |
305 | memset(&old_p, 0, sizeof(old_p)); | |
306 | if (do_get_ioctl(*argv, &old_p)) | |
307 | return -1; | |
308 | *p = old_p; | |
309 | } | |
310 | } | |
311 | count++; | |
312 | argc--; argv++; | |
313 | } | |
314 | ||
315 | ||
316 | if (p->iph.protocol == 0) { | |
317 | if (memcmp(p->name, "gre", 3) == 0) | |
318 | p->iph.protocol = IPPROTO_GRE; | |
319 | else if (memcmp(p->name, "ipip", 4) == 0) | |
320 | p->iph.protocol = IPPROTO_IPIP; | |
321 | else if (memcmp(p->name, "sit", 3) == 0) | |
322 | p->iph.protocol = IPPROTO_IPV6; | |
323 | } | |
324 | ||
325 | if (p->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) { | |
326 | if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) { | |
327 | fprintf(stderr, "Keys are not allowed with ipip and sit.\n"); | |
328 | return -1; | |
329 | } | |
330 | } | |
331 | ||
332 | if (medium[0]) { | |
333 | p->link = do_ioctl_get_ifindex(medium); | |
334 | if (p->link == 0) | |
335 | return -1; | |
336 | } | |
337 | ||
338 | if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) { | |
339 | p->i_key = p->iph.daddr; | |
340 | p->i_flags |= GRE_KEY; | |
341 | } | |
342 | if (p->o_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) { | |
343 | p->o_key = p->iph.daddr; | |
344 | p->o_flags |= GRE_KEY; | |
345 | } | |
346 | if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) { | |
347 | fprintf(stderr, "Broadcast tunnel requires a source address.\n"); | |
348 | return -1; | |
349 | } | |
350 | return 0; | |
351 | } | |
352 | ||
353 | ||
354 | static int do_add(int cmd, int argc, char **argv) | |
355 | { | |
356 | struct ip_tunnel_parm p; | |
357 | ||
358 | if (parse_args(argc, argv, cmd, &p) < 0) | |
359 | return -1; | |
360 | ||
361 | if (p.iph.ttl && p.iph.frag_off == 0) { | |
362 | fprintf(stderr, "ttl != 0 and noptmudisc are incompatible\n"); | |
363 | return -1; | |
364 | } | |
365 | ||
366 | switch (p.iph.protocol) { | |
367 | case IPPROTO_IPIP: | |
368 | return do_add_ioctl(cmd, "tunl0", &p); | |
369 | case IPPROTO_GRE: | |
370 | return do_add_ioctl(cmd, "gre0", &p); | |
371 | case IPPROTO_IPV6: | |
372 | return do_add_ioctl(cmd, "sit0", &p); | |
373 | default: | |
374 | fprintf(stderr, "cannot determine tunnel mode (ipip, gre or sit)\n"); | |
375 | return -1; | |
376 | } | |
377 | return -1; | |
378 | } | |
379 | ||
380 | int do_del(int argc, char **argv) | |
381 | { | |
382 | struct ip_tunnel_parm p; | |
383 | ||
384 | if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0) | |
385 | return -1; | |
386 | ||
387 | switch (p.iph.protocol) { | |
388 | case IPPROTO_IPIP: | |
389 | return do_del_ioctl("tunl0", &p); | |
390 | case IPPROTO_GRE: | |
391 | return do_del_ioctl("gre0", &p); | |
392 | case IPPROTO_IPV6: | |
393 | return do_del_ioctl("sit0", &p); | |
394 | default: | |
395 | return do_del_ioctl(p.name, &p); | |
396 | } | |
397 | return -1; | |
398 | } | |
399 | ||
400 | void print_tunnel(struct ip_tunnel_parm *p) | |
401 | { | |
402 | char s1[1024]; | |
403 | char s2[1024]; | |
404 | char s3[64]; | |
405 | char s4[64]; | |
406 | ||
407 | inet_ntop(AF_INET, &p->i_key, s3, sizeof(s3)); | |
408 | inet_ntop(AF_INET, &p->o_key, s4, sizeof(s4)); | |
409 | ||
410 | /* Do not use format_host() for local addr, | |
411 | * symbolic name will not be useful. | |
412 | */ | |
413 | printf("%s: %s/ip remote %s local %s ", | |
414 | p->name, | |
415 | p->iph.protocol == IPPROTO_IPIP ? "ip" : | |
416 | (p->iph.protocol == IPPROTO_GRE ? "gre" : | |
417 | (p->iph.protocol == IPPROTO_IPV6 ? "ipv6" : "unknown")), | |
418 | p->iph.daddr ? format_host(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1)) : "any", | |
419 | p->iph.saddr ? rt_addr_n2a(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2)) : "any"); | |
420 | ||
421 | if (p->link) { | |
422 | char *n = do_ioctl_get_ifname(p->link); | |
423 | if (n) | |
424 | printf(" dev %s ", n); | |
425 | } | |
426 | ||
427 | if (p->iph.ttl) | |
428 | printf(" ttl %d ", p->iph.ttl); | |
429 | else | |
430 | printf(" ttl inherit "); | |
431 | ||
432 | if (p->iph.tos) { | |
433 | SPRINT_BUF(b1); | |
434 | printf(" tos"); | |
435 | if (p->iph.tos&1) | |
436 | printf(" inherit"); | |
437 | if (p->iph.tos&~1) | |
438 | printf("%c%s ", p->iph.tos&1 ? '/' : ' ', | |
439 | rtnl_dsfield_n2a(p->iph.tos&~1, b1, sizeof(b1))); | |
440 | } | |
441 | ||
442 | if (!(p->iph.frag_off&htons(IP_DF))) | |
443 | printf(" nopmtudisc"); | |
444 | ||
445 | if ((p->i_flags&GRE_KEY) && (p->o_flags&GRE_KEY) && p->o_key == p->i_key) | |
446 | printf(" key %s", s3); | |
447 | else if ((p->i_flags|p->o_flags)&GRE_KEY) { | |
448 | if (p->i_flags&GRE_KEY) | |
449 | printf(" ikey %s ", s3); | |
450 | if (p->o_flags&GRE_KEY) | |
451 | printf(" okey %s ", s4); | |
452 | } | |
453 | ||
454 | if (p->i_flags&GRE_SEQ) | |
455 | printf("%s Drop packets out of sequence.\n", _SL_); | |
456 | if (p->i_flags&GRE_CSUM) | |
457 | printf("%s Checksum in received packet is required.", _SL_); | |
458 | if (p->o_flags&GRE_SEQ) | |
459 | printf("%s Sequence packets on output.", _SL_); | |
460 | if (p->o_flags&GRE_CSUM) | |
461 | printf("%s Checksum output packets.", _SL_); | |
462 | } | |
463 | ||
464 | static int do_tunnels_list(struct ip_tunnel_parm *p) | |
465 | { | |
466 | char name[IFNAMSIZ]; | |
467 | unsigned long rx_bytes, rx_packets, rx_errs, rx_drops, | |
468 | rx_fifo, rx_frame, | |
469 | tx_bytes, tx_packets, tx_errs, tx_drops, | |
470 | tx_fifo, tx_colls, tx_carrier, rx_multi; | |
471 | int type; | |
472 | struct ip_tunnel_parm p1; | |
473 | ||
474 | char buf[512]; | |
475 | FILE *fp = fopen("/proc/net/dev", "r"); | |
476 | if (fp == NULL) { | |
477 | perror("fopen"); | |
478 | return -1; | |
479 | } | |
480 | ||
481 | fgets(buf, sizeof(buf), fp); | |
482 | fgets(buf, sizeof(buf), fp); | |
483 | ||
484 | while (fgets(buf, sizeof(buf), fp) != NULL) { | |
485 | char *ptr; | |
486 | buf[sizeof(buf) - 1] = 0; | |
487 | if ((ptr = strchr(buf, ':')) == NULL || | |
488 | (*ptr++ = 0, sscanf(buf, "%s", name) != 1)) { | |
489 | fprintf(stderr, "Wrong format of /proc/net/dev. Sorry.\n"); | |
490 | return -1; | |
491 | } | |
492 | if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld", | |
493 | &rx_bytes, &rx_packets, &rx_errs, &rx_drops, | |
494 | &rx_fifo, &rx_frame, &rx_multi, | |
495 | &tx_bytes, &tx_packets, &tx_errs, &tx_drops, | |
496 | &tx_fifo, &tx_colls, &tx_carrier) != 14) | |
497 | continue; | |
498 | if (p->name[0] && strcmp(p->name, name)) | |
499 | continue; | |
500 | type = do_ioctl_get_iftype(name); | |
501 | if (type == -1) { | |
502 | fprintf(stderr, "Failed to get type of [%s]\n", name); | |
503 | continue; | |
504 | } | |
505 | if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT) | |
506 | continue; | |
507 | memset(&p1, 0, sizeof(p1)); | |
508 | if (do_get_ioctl(name, &p1)) | |
509 | continue; | |
510 | if ((p->link && p1.link != p->link) || | |
511 | (p->name[0] && strcmp(p1.name, p->name)) || | |
512 | (p->iph.daddr && p1.iph.daddr != p->iph.daddr) || | |
513 | (p->iph.saddr && p1.iph.saddr != p->iph.saddr) || | |
514 | (p->i_key && p1.i_key != p->i_key)) | |
515 | continue; | |
516 | print_tunnel(&p1); | |
517 | if (show_stats) { | |
518 | printf("%s", _SL_); | |
519 | printf("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts%s", _SL_); | |
520 | printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s", | |
521 | rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi, _SL_); | |
522 | printf("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs%s", _SL_); | |
523 | printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld", | |
524 | tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops); | |
525 | } | |
526 | printf("\n"); | |
527 | } | |
528 | return 0; | |
529 | } | |
530 | ||
531 | static int do_show(int argc, char **argv) | |
532 | { | |
533 | int err; | |
534 | struct ip_tunnel_parm p; | |
535 | ||
536 | if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0) | |
537 | return -1; | |
538 | ||
539 | switch (p.iph.protocol) { | |
540 | case IPPROTO_IPIP: | |
541 | err = do_get_ioctl(p.name[0] ? p.name : "tunl0", &p); | |
542 | break; | |
543 | case IPPROTO_GRE: | |
544 | err = do_get_ioctl(p.name[0] ? p.name : "gre0", &p); | |
545 | break; | |
546 | case IPPROTO_IPV6: | |
547 | err = do_get_ioctl(p.name[0] ? p.name : "sit0", &p); | |
548 | break; | |
549 | default: | |
550 | do_tunnels_list(&p); | |
551 | return 0; | |
552 | } | |
553 | if (err) | |
554 | return -1; | |
555 | ||
556 | print_tunnel(&p); | |
557 | printf("\n"); | |
558 | return 0; | |
559 | } | |
560 | ||
561 | int do_iptunnel(int argc, char **argv) | |
562 | { | |
563 | if (argc > 0) { | |
564 | if (matches(*argv, "add") == 0) | |
565 | return do_add(SIOCADDTUNNEL, argc-1, argv+1); | |
566 | if (matches(*argv, "change") == 0) | |
567 | return do_add(SIOCCHGTUNNEL, argc-1, argv+1); | |
568 | if (matches(*argv, "del") == 0) | |
569 | return do_del(argc-1, argv+1); | |
570 | if (matches(*argv, "show") == 0 || | |
571 | matches(*argv, "lst") == 0 || | |
572 | matches(*argv, "list") == 0) | |
573 | return do_show(argc-1, argv+1); | |
574 | if (matches(*argv, "help") == 0) | |
575 | usage(); | |
576 | } else | |
577 | return do_show(0, NULL); | |
578 | ||
579 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip tunnel help\".\n", *argv); | |
580 | exit(-1); | |
581 | } |