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add a source addres length parameter to rt_addr_n2a
[mirror_iproute2.git] / ip / iptunnel.c
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
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <string.h>
16 #include <unistd.h>
17 #include <sys/types.h>
18 #include <sys/socket.h>
19 #include <arpa/inet.h>
20 #include <sys/ioctl.h>
21 #include <net/if.h>
22 #include <net/if_arp.h>
23 #include <linux/ip.h>
24 #include <linux/if_tunnel.h>
25
26 #include "rt_names.h"
27 #include "utils.h"
28 #include "ip_common.h"
29 #include "tunnel.h"
30
31 static void usage(void) __attribute__((noreturn));
32
33 static void usage(void)
34 {
35 fprintf(stderr, "Usage: ip tunnel { add | change | del | show | prl | 6rd } [ NAME ]\n");
36 fprintf(stderr, " [ mode { ipip | gre | sit | isatap | vti } ] [ remote ADDR ] [ local ADDR ]\n");
37 fprintf(stderr, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n");
38 fprintf(stderr, " [ prl-default ADDR ] [ prl-nodefault ADDR ] [ prl-delete ADDR ]\n");
39 fprintf(stderr, " [ 6rd-prefix ADDR ] [ 6rd-relay_prefix ADDR ] [ 6rd-reset ]\n");
40 fprintf(stderr, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
41 fprintf(stderr, "\n");
42 fprintf(stderr, "Where: NAME := STRING\n");
43 fprintf(stderr, " ADDR := { IP_ADDRESS | any }\n");
44 fprintf(stderr, " TOS := { STRING | 00..ff | inherit | inherit/STRING | inherit/00..ff }\n");
45 fprintf(stderr, " TTL := { 1..255 | inherit }\n");
46 fprintf(stderr, " KEY := { DOTTED_QUAD | NUMBER }\n");
47 exit(-1);
48 }
49
50 static int parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
51 {
52 int count = 0;
53 char medium[IFNAMSIZ];
54 int isatap = 0;
55
56 memset(p, 0, sizeof(*p));
57 memset(&medium, 0, sizeof(medium));
58
59 p->iph.version = 4;
60 p->iph.ihl = 5;
61 #ifndef IP_DF
62 #define IP_DF 0x4000 /* Flag: "Don't Fragment" */
63 #endif
64 p->iph.frag_off = htons(IP_DF);
65
66 while (argc > 0) {
67 if (strcmp(*argv, "mode") == 0) {
68 NEXT_ARG();
69 if (strcmp(*argv, "ipip") == 0 ||
70 strcmp(*argv, "ip/ip") == 0) {
71 if (p->iph.protocol && p->iph.protocol != IPPROTO_IPIP) {
72 fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
73 exit(-1);
74 }
75 p->iph.protocol = IPPROTO_IPIP;
76 } else if (strcmp(*argv, "gre") == 0 ||
77 strcmp(*argv, "gre/ip") == 0) {
78 if (p->iph.protocol && p->iph.protocol != IPPROTO_GRE) {
79 fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
80 exit(-1);
81 }
82 p->iph.protocol = IPPROTO_GRE;
83 } else if (strcmp(*argv, "sit") == 0 ||
84 strcmp(*argv, "ipv6/ip") == 0) {
85 if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) {
86 fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
87 exit(-1);
88 }
89 p->iph.protocol = IPPROTO_IPV6;
90 } else if (strcmp(*argv, "isatap") == 0) {
91 if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) {
92 fprintf(stderr, "You managed to ask for more than one tunnel mode.\n");
93 exit(-1);
94 }
95 p->iph.protocol = IPPROTO_IPV6;
96 isatap++;
97 } else if (strcmp(*argv, "vti") == 0) {
98 if (p->iph.protocol && p->iph.protocol != IPPROTO_IPIP) {
99 fprintf(stderr, "You managed to ask for more than one tunnel mode.\n");
100 exit(-1);
101 }
102 p->iph.protocol = IPPROTO_IPIP;
103 p->i_flags |= VTI_ISVTI;
104 } else {
105 fprintf(stderr,"Unknown tunnel mode \"%s\"\n", *argv);
106 exit(-1);
107 }
108 } else if (strcmp(*argv, "key") == 0) {
109 unsigned uval;
110 NEXT_ARG();
111 p->i_flags |= GRE_KEY;
112 p->o_flags |= GRE_KEY;
113 if (strchr(*argv, '.'))
114 p->i_key = p->o_key = get_addr32(*argv);
115 else {
116 if (get_unsigned(&uval, *argv, 0)<0) {
117 fprintf(stderr, "invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv);
118 exit(-1);
119 }
120 p->i_key = p->o_key = htonl(uval);
121 }
122 } else if (strcmp(*argv, "ikey") == 0) {
123 unsigned uval;
124 NEXT_ARG();
125 p->i_flags |= GRE_KEY;
126 if (strchr(*argv, '.'))
127 p->i_key = get_addr32(*argv);
128 else {
129 if (get_unsigned(&uval, *argv, 0)<0) {
130 fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv);
131 exit(-1);
132 }
133 p->i_key = htonl(uval);
134 }
135 } else if (strcmp(*argv, "okey") == 0) {
136 unsigned uval;
137 NEXT_ARG();
138 p->o_flags |= GRE_KEY;
139 if (strchr(*argv, '.'))
140 p->o_key = get_addr32(*argv);
141 else {
142 if (get_unsigned(&uval, *argv, 0)<0) {
143 fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv);
144 exit(-1);
145 }
146 p->o_key = htonl(uval);
147 }
148 } else if (strcmp(*argv, "seq") == 0) {
149 p->i_flags |= GRE_SEQ;
150 p->o_flags |= GRE_SEQ;
151 } else if (strcmp(*argv, "iseq") == 0) {
152 p->i_flags |= GRE_SEQ;
153 } else if (strcmp(*argv, "oseq") == 0) {
154 p->o_flags |= GRE_SEQ;
155 } else if (strcmp(*argv, "csum") == 0) {
156 p->i_flags |= GRE_CSUM;
157 p->o_flags |= GRE_CSUM;
158 } else if (strcmp(*argv, "icsum") == 0) {
159 p->i_flags |= GRE_CSUM;
160 } else if (strcmp(*argv, "ocsum") == 0) {
161 p->o_flags |= GRE_CSUM;
162 } else if (strcmp(*argv, "nopmtudisc") == 0) {
163 p->iph.frag_off = 0;
164 } else if (strcmp(*argv, "pmtudisc") == 0) {
165 p->iph.frag_off = htons(IP_DF);
166 } else if (strcmp(*argv, "remote") == 0) {
167 NEXT_ARG();
168 if (strcmp(*argv, "any"))
169 p->iph.daddr = get_addr32(*argv);
170 } else if (strcmp(*argv, "local") == 0) {
171 NEXT_ARG();
172 if (strcmp(*argv, "any"))
173 p->iph.saddr = get_addr32(*argv);
174 } else if (strcmp(*argv, "dev") == 0) {
175 NEXT_ARG();
176 strncpy(medium, *argv, IFNAMSIZ-1);
177 } else if (strcmp(*argv, "ttl") == 0 ||
178 strcmp(*argv, "hoplimit") == 0) {
179 unsigned uval;
180 NEXT_ARG();
181 if (strcmp(*argv, "inherit") != 0) {
182 if (get_unsigned(&uval, *argv, 0))
183 invarg("invalid TTL\n", *argv);
184 if (uval > 255)
185 invarg("TTL must be <=255\n", *argv);
186 p->iph.ttl = uval;
187 }
188 } else if (strcmp(*argv, "tos") == 0 ||
189 strcmp(*argv, "tclass") == 0 ||
190 matches(*argv, "dsfield") == 0) {
191 char *dsfield;
192 __u32 uval;
193 NEXT_ARG();
194 dsfield = *argv;
195 strsep(&dsfield, "/");
196 if (strcmp(*argv, "inherit") != 0) {
197 dsfield = *argv;
198 p->iph.tos = 0;
199 } else
200 p->iph.tos = 1;
201 if (dsfield) {
202 if (rtnl_dsfield_a2n(&uval, dsfield))
203 invarg("bad TOS value", *argv);
204 p->iph.tos |= uval;
205 }
206 } else {
207 if (strcmp(*argv, "name") == 0) {
208 NEXT_ARG();
209 } else if (matches(*argv, "help") == 0)
210 usage();
211 if (p->name[0])
212 duparg2("name", *argv);
213 strncpy(p->name, *argv, IFNAMSIZ);
214 if (cmd == SIOCCHGTUNNEL && count == 0) {
215 struct ip_tunnel_parm old_p;
216 memset(&old_p, 0, sizeof(old_p));
217 if (tnl_get_ioctl(*argv, &old_p))
218 return -1;
219 *p = old_p;
220 }
221 }
222 count++;
223 argc--; argv++;
224 }
225
226
227 if (p->iph.protocol == 0) {
228 if (memcmp(p->name, "gre", 3) == 0)
229 p->iph.protocol = IPPROTO_GRE;
230 else if (memcmp(p->name, "ipip", 4) == 0)
231 p->iph.protocol = IPPROTO_IPIP;
232 else if (memcmp(p->name, "sit", 3) == 0)
233 p->iph.protocol = IPPROTO_IPV6;
234 else if (memcmp(p->name, "isatap", 6) == 0) {
235 p->iph.protocol = IPPROTO_IPV6;
236 isatap++;
237 } else if (memcmp(p->name, "vti", 3) == 0) {
238 p->iph.protocol = IPPROTO_IPIP;
239 p->i_flags |= VTI_ISVTI;
240 }
241 }
242
243 if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) {
244 if (!(p->i_flags & VTI_ISVTI) &&
245 (p->iph.protocol != IPPROTO_GRE)) {
246 fprintf(stderr, "Keys are not allowed with ipip and sit tunnels\n");
247 return -1;
248 }
249 }
250
251 if (medium[0]) {
252 p->link = if_nametoindex(medium);
253 if (p->link == 0) {
254 fprintf(stderr, "Cannot find device \"%s\"\n",
255 medium);
256 return -1;
257 }
258 }
259
260 if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
261 p->i_key = p->iph.daddr;
262 p->i_flags |= GRE_KEY;
263 }
264 if (p->o_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
265 p->o_key = p->iph.daddr;
266 p->o_flags |= GRE_KEY;
267 }
268 if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) {
269 fprintf(stderr, "A broadcast tunnel requires a source address\n");
270 return -1;
271 }
272 if (isatap)
273 p->i_flags |= SIT_ISATAP;
274
275 return 0;
276 }
277
278
279 static int do_add(int cmd, int argc, char **argv)
280 {
281 struct ip_tunnel_parm p;
282
283 if (parse_args(argc, argv, cmd, &p) < 0)
284 return -1;
285
286 if (p.iph.ttl && p.iph.frag_off == 0) {
287 fprintf(stderr, "ttl != 0 and nopmtudisc are incompatible\n");
288 return -1;
289 }
290
291 switch (p.iph.protocol) {
292 case IPPROTO_IPIP:
293 if (p.i_flags & VTI_ISVTI)
294 return tnl_add_ioctl(cmd, "ip_vti0", p.name, &p);
295 else
296 return tnl_add_ioctl(cmd, "tunl0", p.name, &p);
297 case IPPROTO_GRE:
298 return tnl_add_ioctl(cmd, "gre0", p.name, &p);
299 case IPPROTO_IPV6:
300 return tnl_add_ioctl(cmd, "sit0", p.name, &p);
301 default:
302 fprintf(stderr, "cannot determine tunnel mode (ipip, gre, vti or sit)\n");
303 return -1;
304 }
305 return -1;
306 }
307
308 static int do_del(int argc, char **argv)
309 {
310 struct ip_tunnel_parm p;
311
312 if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
313 return -1;
314
315 switch (p.iph.protocol) {
316 case IPPROTO_IPIP:
317 if (p.i_flags & VTI_ISVTI)
318 return tnl_del_ioctl("ip_vti0", p.name, &p);
319 else
320 return tnl_del_ioctl("tunl0", p.name, &p);
321 case IPPROTO_GRE:
322 return tnl_del_ioctl("gre0", p.name, &p);
323 case IPPROTO_IPV6:
324 return tnl_del_ioctl("sit0", p.name, &p);
325 default:
326 return tnl_del_ioctl(p.name, p.name, &p);
327 }
328 return -1;
329 }
330
331 static void print_tunnel(struct ip_tunnel_parm *p)
332 {
333 struct ip_tunnel_6rd ip6rd;
334 char s1[1024];
335 char s2[1024];
336
337 memset(&ip6rd, 0, sizeof(ip6rd));
338
339 /* Do not use format_host() for local addr,
340 * symbolic name will not be useful.
341 */
342 printf("%s: %s/ip remote %s local %s ",
343 p->name,
344 tnl_strproto(p->iph.protocol),
345 p->iph.daddr ? format_host(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1)) : "any",
346 p->iph.saddr ? rt_addr_n2a(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2)) : "any");
347
348 if (p->iph.protocol == IPPROTO_IPV6 && (p->i_flags & SIT_ISATAP)) {
349 struct ip_tunnel_prl prl[16];
350 int i;
351
352 memset(prl, 0, sizeof(prl));
353 prl[0].datalen = sizeof(prl) - sizeof(prl[0]);
354 prl[0].addr = htonl(INADDR_ANY);
355
356 if (!tnl_prl_ioctl(SIOCGETPRL, p->name, prl))
357 for (i = 1; i < sizeof(prl) / sizeof(prl[0]); i++)
358 {
359 if (prl[i].addr != htonl(INADDR_ANY)) {
360 printf(" %s %s ",
361 (prl[i].flags & PRL_DEFAULT) ? "pdr" : "pr",
362 format_host(AF_INET, 4, &prl[i].addr, s1, sizeof(s1)));
363 }
364 }
365 }
366
367 if (p->link) {
368 const char *n = ll_index_to_name(p->link);
369 if (n)
370 printf(" dev %s ", n);
371 }
372
373 if (p->iph.ttl)
374 printf(" ttl %d ", p->iph.ttl);
375 else
376 printf(" ttl inherit ");
377
378 if (p->iph.tos) {
379 SPRINT_BUF(b1);
380 printf(" tos");
381 if (p->iph.tos&1)
382 printf(" inherit");
383 if (p->iph.tos&~1)
384 printf("%c%s ", p->iph.tos&1 ? '/' : ' ',
385 rtnl_dsfield_n2a(p->iph.tos&~1, b1, sizeof(b1)));
386 }
387
388 if (!(p->iph.frag_off&htons(IP_DF)))
389 printf(" nopmtudisc");
390
391 if (p->iph.protocol == IPPROTO_IPV6 && !tnl_ioctl_get_6rd(p->name, &ip6rd) && ip6rd.prefixlen) {
392 printf(" 6rd-prefix %s/%u ",
393 inet_ntop(AF_INET6, &ip6rd.prefix, s1, sizeof(s1)),
394 ip6rd.prefixlen);
395 if (ip6rd.relay_prefix) {
396 printf("6rd-relay_prefix %s/%u ",
397 format_host(AF_INET, 4, &ip6rd.relay_prefix, s1, sizeof(s1)),
398 ip6rd.relay_prefixlen);
399 }
400 }
401
402 if ((p->i_flags&GRE_KEY) && (p->o_flags&GRE_KEY) && p->o_key == p->i_key)
403 printf(" key %u", ntohl(p->i_key));
404 else if ((p->i_flags|p->o_flags)&GRE_KEY) {
405 if (p->i_flags&GRE_KEY)
406 printf(" ikey %u ", ntohl(p->i_key));
407 if (p->o_flags&GRE_KEY)
408 printf(" okey %u ", ntohl(p->o_key));
409 }
410
411 if (p->i_flags&GRE_SEQ)
412 printf("%s Drop packets out of sequence.", _SL_);
413 if (p->i_flags&GRE_CSUM)
414 printf("%s Checksum in received packet is required.", _SL_);
415 if (p->o_flags&GRE_SEQ)
416 printf("%s Sequence packets on output.", _SL_);
417 if (p->o_flags&GRE_CSUM)
418 printf("%s Checksum output packets.", _SL_);
419 }
420
421 static int do_tunnels_list(struct ip_tunnel_parm *p)
422 {
423 char name[IFNAMSIZ];
424 unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
425 rx_fifo, rx_frame,
426 tx_bytes, tx_packets, tx_errs, tx_drops,
427 tx_fifo, tx_colls, tx_carrier, rx_multi;
428 struct ip_tunnel_parm p1;
429
430 char buf[512];
431 FILE *fp = fopen("/proc/net/dev", "r");
432 if (fp == NULL) {
433 perror("fopen");
434 return -1;
435 }
436
437 /* skip header lines */
438 if (!fgets(buf, sizeof(buf), fp) ||
439 !fgets(buf, sizeof(buf), fp)) {
440 fprintf(stderr, "/proc/net/dev read error\n");
441 fclose(fp);
442 return -1;
443 }
444
445 while (fgets(buf, sizeof(buf), fp) != NULL) {
446 int index, type;
447 char *ptr;
448 buf[sizeof(buf) - 1] = 0;
449 if ((ptr = strchr(buf, ':')) == NULL ||
450 (*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
451 fprintf(stderr, "Wrong format for /proc/net/dev. Giving up.\n");
452 fclose(fp);
453 return -1;
454 }
455 if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
456 &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
457 &rx_fifo, &rx_frame, &rx_multi,
458 &tx_bytes, &tx_packets, &tx_errs, &tx_drops,
459 &tx_fifo, &tx_colls, &tx_carrier) != 14)
460 continue;
461 if (p->name[0] && strcmp(p->name, name))
462 continue;
463 index = ll_name_to_index(name);
464 if (index == 0)
465 continue;
466 type = ll_index_to_type(index);
467 if (type == -1) {
468 fprintf(stderr, "Failed to get type of \"%s\"\n", name);
469 continue;
470 }
471 if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
472 continue;
473 memset(&p1, 0, sizeof(p1));
474 if (tnl_get_ioctl(name, &p1))
475 continue;
476 if ((p->link && p1.link != p->link) ||
477 (p->name[0] && strcmp(p1.name, p->name)) ||
478 (p->iph.daddr && p1.iph.daddr != p->iph.daddr) ||
479 (p->iph.saddr && p1.iph.saddr != p->iph.saddr) ||
480 (p->i_key && p1.i_key != p->i_key))
481 continue;
482 print_tunnel(&p1);
483 if (show_stats) {
484 printf("%s", _SL_);
485 printf("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts%s", _SL_);
486 printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s",
487 rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi, _SL_);
488 printf("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs%s", _SL_);
489 printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld",
490 tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops);
491 }
492 printf("\n");
493 }
494 fclose(fp);
495 return 0;
496 }
497
498 static int do_show(int argc, char **argv)
499 {
500 int err;
501 struct ip_tunnel_parm p;
502
503 ll_init_map(&rth);
504 if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
505 return -1;
506
507 switch (p.iph.protocol) {
508 case IPPROTO_IPIP:
509 if (p.i_flags & VTI_ISVTI)
510 err = tnl_get_ioctl(p.name[0] ? p.name : "ip_vti0", &p);
511 else
512 err = tnl_get_ioctl(p.name[0] ? p.name : "tunl0", &p);
513 break;
514 case IPPROTO_GRE:
515 err = tnl_get_ioctl(p.name[0] ? p.name : "gre0", &p);
516 break;
517 case IPPROTO_IPV6:
518 err = tnl_get_ioctl(p.name[0] ? p.name : "sit0", &p);
519 break;
520 default:
521 do_tunnels_list(&p);
522 return 0;
523 }
524 if (err)
525 return -1;
526
527 print_tunnel(&p);
528 printf("\n");
529 return 0;
530 }
531
532 static int do_prl(int argc, char **argv)
533 {
534 struct ip_tunnel_prl p;
535 int count = 0;
536 int devname = 0;
537 int cmd = 0;
538 char medium[IFNAMSIZ];
539
540 memset(&p, 0, sizeof(p));
541 memset(&medium, 0, sizeof(medium));
542
543 while (argc > 0) {
544 if (strcmp(*argv, "prl-default") == 0) {
545 NEXT_ARG();
546 cmd = SIOCADDPRL;
547 p.addr = get_addr32(*argv);
548 p.flags |= PRL_DEFAULT;
549 count++;
550 } else if (strcmp(*argv, "prl-nodefault") == 0) {
551 NEXT_ARG();
552 cmd = SIOCADDPRL;
553 p.addr = get_addr32(*argv);
554 count++;
555 } else if (strcmp(*argv, "prl-delete") == 0) {
556 NEXT_ARG();
557 cmd = SIOCDELPRL;
558 p.addr = get_addr32(*argv);
559 count++;
560 } else if (strcmp(*argv, "dev") == 0) {
561 NEXT_ARG();
562 strncpy(medium, *argv, IFNAMSIZ-1);
563 devname++;
564 } else {
565 fprintf(stderr,"Invalid PRL parameter \"%s\"\n", *argv);
566 exit(-1);
567 }
568 if (count > 1) {
569 fprintf(stderr,"One PRL entry at a time\n");
570 exit(-1);
571 }
572 argc--; argv++;
573 }
574 if (devname == 0) {
575 fprintf(stderr, "Must specify device\n");
576 exit(-1);
577 }
578
579 return tnl_prl_ioctl(cmd, medium, &p);
580 }
581
582 static int do_6rd(int argc, char **argv)
583 {
584 struct ip_tunnel_6rd ip6rd;
585 int devname = 0;
586 int cmd = 0;
587 char medium[IFNAMSIZ];
588 inet_prefix prefix;
589
590 memset(&ip6rd, 0, sizeof(ip6rd));
591 memset(&medium, 0, sizeof(medium));
592
593 while (argc > 0) {
594 if (strcmp(*argv, "6rd-prefix") == 0) {
595 NEXT_ARG();
596 if (get_prefix(&prefix, *argv, AF_INET6))
597 invarg("invalid 6rd_prefix\n", *argv);
598 cmd = SIOCADD6RD;
599 memcpy(&ip6rd.prefix, prefix.data, 16);
600 ip6rd.prefixlen = prefix.bitlen;
601 } else if (strcmp(*argv, "6rd-relay_prefix") == 0) {
602 NEXT_ARG();
603 if (get_prefix(&prefix, *argv, AF_INET))
604 invarg("invalid 6rd-relay_prefix\n", *argv);
605 cmd = SIOCADD6RD;
606 memcpy(&ip6rd.relay_prefix, prefix.data, 4);
607 ip6rd.relay_prefixlen = prefix.bitlen;
608 } else if (strcmp(*argv, "6rd-reset") == 0) {
609 cmd = SIOCDEL6RD;
610 } else if (strcmp(*argv, "dev") == 0) {
611 NEXT_ARG();
612 strncpy(medium, *argv, IFNAMSIZ-1);
613 devname++;
614 } else {
615 fprintf(stderr,"Invalid 6RD parameter \"%s\"\n", *argv);
616 exit(-1);
617 }
618 argc--; argv++;
619 }
620 if (devname == 0) {
621 fprintf(stderr, "Must specify device\n");
622 exit(-1);
623 }
624
625 return tnl_6rd_ioctl(cmd, medium, &ip6rd);
626 }
627
628 int do_iptunnel(int argc, char **argv)
629 {
630 switch (preferred_family) {
631 case AF_UNSPEC:
632 preferred_family = AF_INET;
633 break;
634 case AF_INET:
635 break;
636 /*
637 * This is silly enough but we have no easy way to make it
638 * protocol-independent because of unarranged structure between
639 * IPv4 and IPv6.
640 */
641 case AF_INET6:
642 return do_ip6tunnel(argc, argv);
643 default:
644 fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
645 exit(-1);
646 }
647
648 if (argc > 0) {
649 if (matches(*argv, "add") == 0)
650 return do_add(SIOCADDTUNNEL, argc-1, argv+1);
651 if (matches(*argv, "change") == 0)
652 return do_add(SIOCCHGTUNNEL, argc-1, argv+1);
653 if (matches(*argv, "delete") == 0)
654 return do_del(argc-1, argv+1);
655 if (matches(*argv, "show") == 0 ||
656 matches(*argv, "lst") == 0 ||
657 matches(*argv, "list") == 0)
658 return do_show(argc-1, argv+1);
659 if (matches(*argv, "prl") == 0)
660 return do_prl(argc-1, argv+1);
661 if (matches(*argv, "6rd") == 0)
662 return do_6rd(argc-1, argv+1);
663 if (matches(*argv, "help") == 0)
664 usage();
665 } else
666 return do_show(0, NULL);
667
668 fprintf(stderr, "Command \"%s\" is unknown, try \"ip tunnel help\"\n", *argv);
669 exit(-1);
670 }
Upstream mirror of iproute2