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Merge branch 'net-next-3.10'
[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->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) {
244 if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) {
245 fprintf(stderr, "Keys are not allowed with ipip and sit tunnels\n");
246 return -1;
247 }
248 }
249
250 if (medium[0]) {
251 p->link = if_nametoindex(medium);
252 if (p->link == 0)
253 return -1;
254 }
255
256 if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
257 p->i_key = p->iph.daddr;
258 p->i_flags |= GRE_KEY;
259 }
260 if (p->o_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
261 p->o_key = p->iph.daddr;
262 p->o_flags |= GRE_KEY;
263 }
264 if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) {
265 fprintf(stderr, "A broadcast tunnel requires a source address\n");
266 return -1;
267 }
268 if (isatap)
269 p->i_flags |= SIT_ISATAP;
270
271 return 0;
272 }
273
274
275 static int do_add(int cmd, int argc, char **argv)
276 {
277 struct ip_tunnel_parm p;
278
279 if (parse_args(argc, argv, cmd, &p) < 0)
280 return -1;
281
282 if (p.iph.ttl && p.iph.frag_off == 0) {
283 fprintf(stderr, "ttl != 0 and noptmudisc are incompatible\n");
284 return -1;
285 }
286
287 switch (p.iph.protocol) {
288 case IPPROTO_IPIP:
289 if (p.i_flags != VTI_ISVTI)
290 return tnl_add_ioctl(cmd, "tunl0", p.name, &p);
291 else
292 return tnl_add_ioctl(cmd, "ip_vti0", p.name, &p);
293 case IPPROTO_GRE:
294 return tnl_add_ioctl(cmd, "gre0", p.name, &p);
295 case IPPROTO_IPV6:
296 return tnl_add_ioctl(cmd, "sit0", p.name, &p);
297 default:
298 fprintf(stderr, "cannot determine tunnel mode (ipip, gre, vti or sit)\n");
299 return -1;
300 }
301 return -1;
302 }
303
304 static int do_del(int argc, char **argv)
305 {
306 struct ip_tunnel_parm p;
307
308 if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
309 return -1;
310
311 switch (p.iph.protocol) {
312 case IPPROTO_IPIP:
313 if (p.i_flags != VTI_ISVTI)
314 return tnl_del_ioctl("tunl0", p.name, &p);
315 else
316 return tnl_del_ioctl("ip_vti0", p.name, &p);
317 case IPPROTO_GRE:
318 return tnl_del_ioctl("gre0", p.name, &p);
319 case IPPROTO_IPV6:
320 return tnl_del_ioctl("sit0", p.name, &p);
321 default:
322 return tnl_del_ioctl(p.name, p.name, &p);
323 }
324 return -1;
325 }
326
327 static void print_tunnel(struct ip_tunnel_parm *p)
328 {
329 struct ip_tunnel_6rd ip6rd;
330 char s1[1024];
331 char s2[1024];
332
333 memset(&ip6rd, 0, sizeof(ip6rd));
334
335 /* Do not use format_host() for local addr,
336 * symbolic name will not be useful.
337 */
338 printf("%s: %s/ip remote %s local %s ",
339 p->name,
340 tnl_strproto(p->iph.protocol),
341 p->iph.daddr ? format_host(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1)) : "any",
342 p->iph.saddr ? rt_addr_n2a(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2)) : "any");
343
344 if (p->iph.protocol == IPPROTO_IPV6 && (p->i_flags & SIT_ISATAP)) {
345 struct ip_tunnel_prl prl[16];
346 int i;
347
348 memset(prl, 0, sizeof(prl));
349 prl[0].datalen = sizeof(prl) - sizeof(prl[0]);
350 prl[0].addr = htonl(INADDR_ANY);
351
352 if (!tnl_prl_ioctl(SIOCGETPRL, p->name, prl))
353 for (i = 1; i < sizeof(prl) / sizeof(prl[0]); i++)
354 {
355 if (prl[i].addr != htonl(INADDR_ANY)) {
356 printf(" %s %s ",
357 (prl[i].flags & PRL_DEFAULT) ? "pdr" : "pr",
358 format_host(AF_INET, 4, &prl[i].addr, s1, sizeof(s1)));
359 }
360 }
361 }
362
363 if (p->link) {
364 const char *n = ll_index_to_name(p->link);
365 if (n)
366 printf(" dev %s ", n);
367 }
368
369 if (p->iph.ttl)
370 printf(" ttl %d ", p->iph.ttl);
371 else
372 printf(" ttl inherit ");
373
374 if (p->iph.tos) {
375 SPRINT_BUF(b1);
376 printf(" tos");
377 if (p->iph.tos&1)
378 printf(" inherit");
379 if (p->iph.tos&~1)
380 printf("%c%s ", p->iph.tos&1 ? '/' : ' ',
381 rtnl_dsfield_n2a(p->iph.tos&~1, b1, sizeof(b1)));
382 }
383
384 if (!(p->iph.frag_off&htons(IP_DF)))
385 printf(" nopmtudisc");
386
387 if (p->iph.protocol == IPPROTO_IPV6 && !tnl_ioctl_get_6rd(p->name, &ip6rd) && ip6rd.prefixlen) {
388 printf(" 6rd-prefix %s/%u ",
389 inet_ntop(AF_INET6, &ip6rd.prefix, s1, sizeof(s1)),
390 ip6rd.prefixlen);
391 if (ip6rd.relay_prefix) {
392 printf("6rd-relay_prefix %s/%u ",
393 format_host(AF_INET, 4, &ip6rd.relay_prefix, s1, sizeof(s1)),
394 ip6rd.relay_prefixlen);
395 }
396 }
397
398 if ((p->i_flags&GRE_KEY) && (p->o_flags&GRE_KEY) && p->o_key == p->i_key)
399 printf(" key %u", ntohl(p->i_key));
400 else if ((p->i_flags|p->o_flags)&GRE_KEY) {
401 if (p->i_flags&GRE_KEY)
402 printf(" ikey %u ", ntohl(p->i_key));
403 if (p->o_flags&GRE_KEY)
404 printf(" okey %u ", ntohl(p->o_key));
405 }
406
407 if (p->i_flags&GRE_SEQ)
408 printf("%s Drop packets out of sequence.\n", _SL_);
409 if (p->i_flags&GRE_CSUM)
410 printf("%s Checksum in received packet is required.", _SL_);
411 if (p->o_flags&GRE_SEQ)
412 printf("%s Sequence packets on output.", _SL_);
413 if (p->o_flags&GRE_CSUM)
414 printf("%s Checksum output packets.", _SL_);
415 }
416
417 static int do_tunnels_list(struct ip_tunnel_parm *p)
418 {
419 char name[IFNAMSIZ];
420 unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
421 rx_fifo, rx_frame,
422 tx_bytes, tx_packets, tx_errs, tx_drops,
423 tx_fifo, tx_colls, tx_carrier, rx_multi;
424 struct ip_tunnel_parm p1;
425
426 char buf[512];
427 FILE *fp = fopen("/proc/net/dev", "r");
428 if (fp == NULL) {
429 perror("fopen");
430 return -1;
431 }
432
433 /* skip header lines */
434 if (!fgets(buf, sizeof(buf), fp) ||
435 !fgets(buf, sizeof(buf), fp)) {
436 fprintf(stderr, "/proc/net/dev read error\n");
437 fclose(fp);
438 return -1;
439 }
440
441 while (fgets(buf, sizeof(buf), fp) != NULL) {
442 int index, type;
443 char *ptr;
444 buf[sizeof(buf) - 1] = 0;
445 if ((ptr = strchr(buf, ':')) == NULL ||
446 (*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
447 fprintf(stderr, "Wrong format for /proc/net/dev. Giving up.\n");
448 fclose(fp);
449 return -1;
450 }
451 if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
452 &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
453 &rx_fifo, &rx_frame, &rx_multi,
454 &tx_bytes, &tx_packets, &tx_errs, &tx_drops,
455 &tx_fifo, &tx_colls, &tx_carrier) != 14)
456 continue;
457 if (p->name[0] && strcmp(p->name, name))
458 continue;
459 index = ll_name_to_index(name);
460 if (index == 0)
461 continue;
462 type = ll_index_to_type(index);
463 if (type == -1) {
464 fprintf(stderr, "Failed to get type of \"%s\"\n", name);
465 continue;
466 }
467 if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
468 continue;
469 memset(&p1, 0, sizeof(p1));
470 if (tnl_get_ioctl(name, &p1))
471 continue;
472 if ((p->link && p1.link != p->link) ||
473 (p->name[0] && strcmp(p1.name, p->name)) ||
474 (p->iph.daddr && p1.iph.daddr != p->iph.daddr) ||
475 (p->iph.saddr && p1.iph.saddr != p->iph.saddr) ||
476 (p->i_key && p1.i_key != p->i_key))
477 continue;
478 print_tunnel(&p1);
479 if (show_stats) {
480 printf("%s", _SL_);
481 printf("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts%s", _SL_);
482 printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s",
483 rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi, _SL_);
484 printf("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs%s", _SL_);
485 printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld",
486 tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops);
487 }
488 printf("\n");
489 }
490 fclose(fp);
491 return 0;
492 }
493
494 static int do_show(int argc, char **argv)
495 {
496 int err;
497 struct ip_tunnel_parm p;
498
499 ll_init_map(&rth);
500 if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
501 return -1;
502
503 switch (p.iph.protocol) {
504 case IPPROTO_IPIP:
505 if (p.i_flags != VTI_ISVTI)
506 err = tnl_get_ioctl(p.name[0] ? p.name : "tunl0", &p);
507 else
508 err = tnl_get_ioctl(p.name[0] ? p.name : "ip_vti0", &p);
509 break;
510 case IPPROTO_GRE:
511 err = tnl_get_ioctl(p.name[0] ? p.name : "gre0", &p);
512 break;
513 case IPPROTO_IPV6:
514 err = tnl_get_ioctl(p.name[0] ? p.name : "sit0", &p);
515 break;
516 default:
517 do_tunnels_list(&p);
518 return 0;
519 }
520 if (err)
521 return -1;
522
523 print_tunnel(&p);
524 printf("\n");
525 return 0;
526 }
527
528 static int do_prl(int argc, char **argv)
529 {
530 struct ip_tunnel_prl p;
531 int count = 0;
532 int devname = 0;
533 int cmd = 0;
534 char medium[IFNAMSIZ];
535
536 memset(&p, 0, sizeof(p));
537 memset(&medium, 0, sizeof(medium));
538
539 while (argc > 0) {
540 if (strcmp(*argv, "prl-default") == 0) {
541 NEXT_ARG();
542 cmd = SIOCADDPRL;
543 p.addr = get_addr32(*argv);
544 p.flags |= PRL_DEFAULT;
545 count++;
546 } else if (strcmp(*argv, "prl-nodefault") == 0) {
547 NEXT_ARG();
548 cmd = SIOCADDPRL;
549 p.addr = get_addr32(*argv);
550 count++;
551 } else if (strcmp(*argv, "prl-delete") == 0) {
552 NEXT_ARG();
553 cmd = SIOCDELPRL;
554 p.addr = get_addr32(*argv);
555 count++;
556 } else if (strcmp(*argv, "dev") == 0) {
557 NEXT_ARG();
558 strncpy(medium, *argv, IFNAMSIZ-1);
559 devname++;
560 } else {
561 fprintf(stderr,"Invalid PRL parameter \"%s\"\n", *argv);
562 exit(-1);
563 }
564 if (count > 1) {
565 fprintf(stderr,"One PRL entry at a time\n");
566 exit(-1);
567 }
568 argc--; argv++;
569 }
570 if (devname == 0) {
571 fprintf(stderr, "Must specify device\n");
572 exit(-1);
573 }
574
575 return tnl_prl_ioctl(cmd, medium, &p);
576 }
577
578 static int do_6rd(int argc, char **argv)
579 {
580 struct ip_tunnel_6rd ip6rd;
581 int devname = 0;
582 int cmd = 0;
583 char medium[IFNAMSIZ];
584 inet_prefix prefix;
585
586 memset(&ip6rd, 0, sizeof(ip6rd));
587 memset(&medium, 0, sizeof(medium));
588
589 while (argc > 0) {
590 if (strcmp(*argv, "6rd-prefix") == 0) {
591 NEXT_ARG();
592 if (get_prefix(&prefix, *argv, AF_INET6))
593 invarg("invalid 6rd_prefix\n", *argv);
594 cmd = SIOCADD6RD;
595 memcpy(&ip6rd.prefix, prefix.data, 16);
596 ip6rd.prefixlen = prefix.bitlen;
597 } else if (strcmp(*argv, "6rd-relay_prefix") == 0) {
598 NEXT_ARG();
599 if (get_prefix(&prefix, *argv, AF_INET))
600 invarg("invalid 6rd-relay_prefix\n", *argv);
601 cmd = SIOCADD6RD;
602 memcpy(&ip6rd.relay_prefix, prefix.data, 4);
603 ip6rd.relay_prefixlen = prefix.bitlen;
604 } else if (strcmp(*argv, "6rd-reset") == 0) {
605 cmd = SIOCDEL6RD;
606 } else if (strcmp(*argv, "dev") == 0) {
607 NEXT_ARG();
608 strncpy(medium, *argv, IFNAMSIZ-1);
609 devname++;
610 } else {
611 fprintf(stderr,"Invalid 6RD parameter \"%s\"\n", *argv);
612 exit(-1);
613 }
614 argc--; argv++;
615 }
616 if (devname == 0) {
617 fprintf(stderr, "Must specify device\n");
618 exit(-1);
619 }
620
621 return tnl_6rd_ioctl(cmd, medium, &ip6rd);
622 }
623
624 int do_iptunnel(int argc, char **argv)
625 {
626 switch (preferred_family) {
627 case AF_UNSPEC:
628 preferred_family = AF_INET;
629 break;
630 case AF_INET:
631 break;
632 /*
633 * This is silly enough but we have no easy way to make it
634 * protocol-independent because of unarranged structure between
635 * IPv4 and IPv6.
636 */
637 case AF_INET6:
638 return do_ip6tunnel(argc, argv);
639 default:
640 fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
641 exit(-1);
642 }
643
644 if (argc > 0) {
645 if (matches(*argv, "add") == 0)
646 return do_add(SIOCADDTUNNEL, argc-1, argv+1);
647 if (matches(*argv, "change") == 0)
648 return do_add(SIOCCHGTUNNEL, argc-1, argv+1);
649 if (matches(*argv, "delete") == 0)
650 return do_del(argc-1, argv+1);
651 if (matches(*argv, "show") == 0 ||
652 matches(*argv, "lst") == 0 ||
653 matches(*argv, "list") == 0)
654 return do_show(argc-1, argv+1);
655 if (matches(*argv, "prl") == 0)
656 return do_prl(argc-1, argv+1);
657 if (matches(*argv, "6rd") == 0)
658 return do_6rd(argc-1, argv+1);
659 if (matches(*argv, "help") == 0)
660 usage();
661 } else
662 return do_show(0, NULL);
663
664 fprintf(stderr, "Command \"%s\" is unknown, try \"ip tunnel help\"\n", *argv);
665 exit(-1);
666 }
Upstream mirror of iproute2