Contents of /trunk/mkinitrd-magellan/busybox/networking/libiproute/iptunnel.c
Parent Directory | Revision Log
Revision 984 -
(show annotations)
(download)
Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 15156 byte(s)
Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 15156 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * iptunnel.c "ip tunnel" |
4 | * |
5 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
6 | * |
7 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
8 | * |
9 | * Changes: |
10 | * |
11 | * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses |
12 | * Rani Assaf <rani@magic.metawire.com> 980930: do not allow key for ipip/sit |
13 | * Phil Karn <karn@ka9q.ampr.org> 990408: "pmtudisc" flag |
14 | */ |
15 | |
16 | #include <netinet/ip.h> |
17 | #include <net/if.h> |
18 | #include <net/if_arp.h> |
19 | #include <asm/types.h> |
20 | |
21 | #ifndef __constant_htons |
22 | #define __constant_htons htons |
23 | #endif |
24 | |
25 | // FYI: #define SIOCDEVPRIVATE 0x89F0 |
26 | |
27 | /* From linux/if_tunnel.h. #including it proved troublesome |
28 | * (redefiniton errors due to name collisions in linux/ and net[inet]/) */ |
29 | #define SIOCGETTUNNEL (SIOCDEVPRIVATE + 0) |
30 | #define SIOCADDTUNNEL (SIOCDEVPRIVATE + 1) |
31 | #define SIOCDELTUNNEL (SIOCDEVPRIVATE + 2) |
32 | #define SIOCCHGTUNNEL (SIOCDEVPRIVATE + 3) |
33 | //#define SIOCGETPRL (SIOCDEVPRIVATE + 4) |
34 | //#define SIOCADDPRL (SIOCDEVPRIVATE + 5) |
35 | //#define SIOCDELPRL (SIOCDEVPRIVATE + 6) |
36 | //#define SIOCCHGPRL (SIOCDEVPRIVATE + 7) |
37 | #define GRE_CSUM __constant_htons(0x8000) |
38 | //#define GRE_ROUTING __constant_htons(0x4000) |
39 | #define GRE_KEY __constant_htons(0x2000) |
40 | #define GRE_SEQ __constant_htons(0x1000) |
41 | //#define GRE_STRICT __constant_htons(0x0800) |
42 | //#define GRE_REC __constant_htons(0x0700) |
43 | //#define GRE_FLAGS __constant_htons(0x00F8) |
44 | //#define GRE_VERSION __constant_htons(0x0007) |
45 | struct ip_tunnel_parm { |
46 | char name[IFNAMSIZ]; |
47 | int link; |
48 | uint16_t i_flags; |
49 | uint16_t o_flags; |
50 | uint32_t i_key; |
51 | uint32_t o_key; |
52 | struct iphdr iph; |
53 | }; |
54 | /* SIT-mode i_flags */ |
55 | //#define SIT_ISATAP 0x0001 |
56 | //struct ip_tunnel_prl { |
57 | // uint32_t addr; |
58 | // uint16_t flags; |
59 | // uint16_t __reserved; |
60 | // uint32_t datalen; |
61 | // uint32_t __reserved2; |
62 | // /* data follows */ |
63 | //}; |
64 | ///* PRL flags */ |
65 | //#define PRL_DEFAULT 0x0001 |
66 | |
67 | #include "ip_common.h" /* #include "libbb.h" is inside */ |
68 | #include "rt_names.h" |
69 | #include "utils.h" |
70 | |
71 | |
72 | /* Dies on error */ |
73 | static int do_ioctl_get_ifindex(char *dev) |
74 | { |
75 | struct ifreq ifr; |
76 | int fd; |
77 | |
78 | strncpy_IFNAMSIZ(ifr.ifr_name, dev); |
79 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
80 | xioctl(fd, SIOCGIFINDEX, &ifr); |
81 | close(fd); |
82 | return ifr.ifr_ifindex; |
83 | } |
84 | |
85 | static int do_ioctl_get_iftype(char *dev) |
86 | { |
87 | struct ifreq ifr; |
88 | int fd; |
89 | int err; |
90 | |
91 | strncpy_IFNAMSIZ(ifr.ifr_name, dev); |
92 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
93 | err = ioctl_or_warn(fd, SIOCGIFHWADDR, &ifr); |
94 | close(fd); |
95 | return err ? -1 : ifr.ifr_addr.sa_family; |
96 | } |
97 | |
98 | static char *do_ioctl_get_ifname(int idx) |
99 | { |
100 | struct ifreq ifr; |
101 | int fd; |
102 | int err; |
103 | |
104 | ifr.ifr_ifindex = idx; |
105 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
106 | err = ioctl_or_warn(fd, SIOCGIFNAME, &ifr); |
107 | close(fd); |
108 | return err ? NULL : xstrndup(ifr.ifr_name, sizeof(ifr.ifr_name)); |
109 | } |
110 | |
111 | static int do_get_ioctl(const char *basedev, struct ip_tunnel_parm *p) |
112 | { |
113 | struct ifreq ifr; |
114 | int fd; |
115 | int err; |
116 | |
117 | strncpy_IFNAMSIZ(ifr.ifr_name, basedev); |
118 | ifr.ifr_ifru.ifru_data = (void*)p; |
119 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
120 | err = ioctl_or_warn(fd, SIOCGETTUNNEL, &ifr); |
121 | close(fd); |
122 | return err; |
123 | } |
124 | |
125 | /* Dies on error, otherwise returns 0 */ |
126 | static int do_add_ioctl(int cmd, const char *basedev, struct ip_tunnel_parm *p) |
127 | { |
128 | struct ifreq ifr; |
129 | int fd; |
130 | |
131 | if (cmd == SIOCCHGTUNNEL && p->name[0]) { |
132 | strncpy_IFNAMSIZ(ifr.ifr_name, p->name); |
133 | } else { |
134 | strncpy_IFNAMSIZ(ifr.ifr_name, basedev); |
135 | } |
136 | ifr.ifr_ifru.ifru_data = (void*)p; |
137 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
138 | #if ENABLE_IOCTL_HEX2STR_ERROR |
139 | /* #define magic will turn ioctl# into string */ |
140 | if (cmd == SIOCCHGTUNNEL) |
141 | xioctl(fd, SIOCCHGTUNNEL, &ifr); |
142 | else |
143 | xioctl(fd, SIOCADDTUNNEL, &ifr); |
144 | #else |
145 | xioctl(fd, cmd, &ifr); |
146 | #endif |
147 | close(fd); |
148 | return 0; |
149 | } |
150 | |
151 | /* Dies on error, otherwise returns 0 */ |
152 | static int do_del_ioctl(const char *basedev, struct ip_tunnel_parm *p) |
153 | { |
154 | struct ifreq ifr; |
155 | int fd; |
156 | |
157 | if (p->name[0]) { |
158 | strncpy_IFNAMSIZ(ifr.ifr_name, p->name); |
159 | } else { |
160 | strncpy_IFNAMSIZ(ifr.ifr_name, basedev); |
161 | } |
162 | ifr.ifr_ifru.ifru_data = (void*)p; |
163 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
164 | xioctl(fd, SIOCDELTUNNEL, &ifr); |
165 | close(fd); |
166 | return 0; |
167 | } |
168 | |
169 | /* Dies on error */ |
170 | static void parse_args(char **argv, int cmd, struct ip_tunnel_parm *p) |
171 | { |
172 | static const char keywords[] ALIGN1 = |
173 | "mode\0""ipip\0""ip/ip\0""gre\0""gre/ip\0""sit\0""ipv6/ip\0" |
174 | "key\0""ikey\0""okey\0""seq\0""iseq\0""oseq\0" |
175 | "csum\0""icsum\0""ocsum\0""nopmtudisc\0""pmtudisc\0" |
176 | "remote\0""any\0""local\0""dev\0" |
177 | "ttl\0""inherit\0""tos\0""dsfield\0" |
178 | "name\0"; |
179 | enum { |
180 | ARG_mode, ARG_ipip, ARG_ip_ip, ARG_gre, ARG_gre_ip, ARG_sit, ARG_ip6_ip, |
181 | ARG_key, ARG_ikey, ARG_okey, ARG_seq, ARG_iseq, ARG_oseq, |
182 | ARG_csum, ARG_icsum, ARG_ocsum, ARG_nopmtudisc, ARG_pmtudisc, |
183 | ARG_remote, ARG_any, ARG_local, ARG_dev, |
184 | ARG_ttl, ARG_inherit, ARG_tos, ARG_dsfield, |
185 | ARG_name |
186 | }; |
187 | int count = 0; |
188 | char medium[IFNAMSIZ]; |
189 | int key; |
190 | |
191 | memset(p, 0, sizeof(*p)); |
192 | medium[0] = '\0'; |
193 | |
194 | p->iph.version = 4; |
195 | p->iph.ihl = 5; |
196 | #ifndef IP_DF |
197 | #define IP_DF 0x4000 /* Flag: "Don't Fragment" */ |
198 | #endif |
199 | p->iph.frag_off = htons(IP_DF); |
200 | |
201 | while (*argv) { |
202 | key = index_in_strings(keywords, *argv); |
203 | if (key == ARG_mode) { |
204 | NEXT_ARG(); |
205 | key = index_in_strings(keywords, *argv); |
206 | if (key == ARG_ipip || |
207 | key == ARG_ip_ip) { |
208 | if (p->iph.protocol && p->iph.protocol != IPPROTO_IPIP) { |
209 | bb_error_msg_and_die("%s tunnel mode", "you managed to ask for more than one"); |
210 | } |
211 | p->iph.protocol = IPPROTO_IPIP; |
212 | } else if (key == ARG_gre || |
213 | key == ARG_gre_ip) { |
214 | if (p->iph.protocol && p->iph.protocol != IPPROTO_GRE) { |
215 | bb_error_msg_and_die("%s tunnel mode", "you managed to ask for more than one"); |
216 | } |
217 | p->iph.protocol = IPPROTO_GRE; |
218 | } else if (key == ARG_sit || |
219 | key == ARG_ip6_ip) { |
220 | if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) { |
221 | bb_error_msg_and_die("%s tunnel mode", "you managed to ask for more than one"); |
222 | } |
223 | p->iph.protocol = IPPROTO_IPV6; |
224 | } else { |
225 | bb_error_msg_and_die("%s tunnel mode", "can't guess"); |
226 | } |
227 | } else if (key == ARG_key) { |
228 | unsigned uval; |
229 | NEXT_ARG(); |
230 | p->i_flags |= GRE_KEY; |
231 | p->o_flags |= GRE_KEY; |
232 | if (strchr(*argv, '.')) |
233 | p->i_key = p->o_key = get_addr32(*argv); |
234 | else { |
235 | uval = get_unsigned(*argv, "key"); |
236 | p->i_key = p->o_key = htonl(uval); |
237 | } |
238 | } else if (key == ARG_ikey) { |
239 | unsigned uval; |
240 | NEXT_ARG(); |
241 | p->i_flags |= GRE_KEY; |
242 | if (strchr(*argv, '.')) |
243 | p->o_key = get_addr32(*argv); |
244 | else { |
245 | uval = get_unsigned(*argv, "ikey"); |
246 | p->i_key = htonl(uval); |
247 | } |
248 | } else if (key == ARG_okey) { |
249 | unsigned uval; |
250 | NEXT_ARG(); |
251 | p->o_flags |= GRE_KEY; |
252 | if (strchr(*argv, '.')) |
253 | p->o_key = get_addr32(*argv); |
254 | else { |
255 | uval = get_unsigned(*argv, "okey"); |
256 | p->o_key = htonl(uval); |
257 | } |
258 | } else if (key == ARG_seq) { |
259 | p->i_flags |= GRE_SEQ; |
260 | p->o_flags |= GRE_SEQ; |
261 | } else if (key == ARG_iseq) { |
262 | p->i_flags |= GRE_SEQ; |
263 | } else if (key == ARG_oseq) { |
264 | p->o_flags |= GRE_SEQ; |
265 | } else if (key == ARG_csum) { |
266 | p->i_flags |= GRE_CSUM; |
267 | p->o_flags |= GRE_CSUM; |
268 | } else if (key == ARG_icsum) { |
269 | p->i_flags |= GRE_CSUM; |
270 | } else if (key == ARG_ocsum) { |
271 | p->o_flags |= GRE_CSUM; |
272 | } else if (key == ARG_nopmtudisc) { |
273 | p->iph.frag_off = 0; |
274 | } else if (key == ARG_pmtudisc) { |
275 | p->iph.frag_off = htons(IP_DF); |
276 | } else if (key == ARG_remote) { |
277 | NEXT_ARG(); |
278 | key = index_in_strings(keywords, *argv); |
279 | if (key != ARG_any) |
280 | p->iph.daddr = get_addr32(*argv); |
281 | } else if (key == ARG_local) { |
282 | NEXT_ARG(); |
283 | key = index_in_strings(keywords, *argv); |
284 | if (key != ARG_any) |
285 | p->iph.saddr = get_addr32(*argv); |
286 | } else if (key == ARG_dev) { |
287 | NEXT_ARG(); |
288 | strncpy_IFNAMSIZ(medium, *argv); |
289 | } else if (key == ARG_ttl) { |
290 | unsigned uval; |
291 | NEXT_ARG(); |
292 | key = index_in_strings(keywords, *argv); |
293 | if (key != ARG_inherit) { |
294 | uval = get_unsigned(*argv, "TTL"); |
295 | if (uval > 255) |
296 | invarg(*argv, "TTL must be <=255"); |
297 | p->iph.ttl = uval; |
298 | } |
299 | } else if (key == ARG_tos || |
300 | key == ARG_dsfield) { |
301 | uint32_t uval; |
302 | NEXT_ARG(); |
303 | key = index_in_strings(keywords, *argv); |
304 | if (key != ARG_inherit) { |
305 | if (rtnl_dsfield_a2n(&uval, *argv)) |
306 | invarg(*argv, "TOS"); |
307 | p->iph.tos = uval; |
308 | } else |
309 | p->iph.tos = 1; |
310 | } else { |
311 | if (key == ARG_name) { |
312 | NEXT_ARG(); |
313 | } |
314 | if (p->name[0]) |
315 | duparg2("name", *argv); |
316 | strncpy_IFNAMSIZ(p->name, *argv); |
317 | if (cmd == SIOCCHGTUNNEL && count == 0) { |
318 | struct ip_tunnel_parm old_p; |
319 | memset(&old_p, 0, sizeof(old_p)); |
320 | if (do_get_ioctl(*argv, &old_p)) |
321 | exit(EXIT_FAILURE); |
322 | *p = old_p; |
323 | } |
324 | } |
325 | count++; |
326 | argv++; |
327 | } |
328 | |
329 | if (p->iph.protocol == 0) { |
330 | if (memcmp(p->name, "gre", 3) == 0) |
331 | p->iph.protocol = IPPROTO_GRE; |
332 | else if (memcmp(p->name, "ipip", 4) == 0) |
333 | p->iph.protocol = IPPROTO_IPIP; |
334 | else if (memcmp(p->name, "sit", 3) == 0) |
335 | p->iph.protocol = IPPROTO_IPV6; |
336 | } |
337 | |
338 | if (p->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) { |
339 | if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) { |
340 | bb_error_msg_and_die("keys are not allowed with ipip and sit"); |
341 | } |
342 | } |
343 | |
344 | if (medium[0]) { |
345 | p->link = do_ioctl_get_ifindex(medium); |
346 | } |
347 | |
348 | if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) { |
349 | p->i_key = p->iph.daddr; |
350 | p->i_flags |= GRE_KEY; |
351 | } |
352 | if (p->o_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) { |
353 | p->o_key = p->iph.daddr; |
354 | p->o_flags |= GRE_KEY; |
355 | } |
356 | if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) { |
357 | bb_error_msg_and_die("broadcast tunnel requires a source address"); |
358 | } |
359 | } |
360 | |
361 | /* Return value becomes exitcode. It's okay to not return at all */ |
362 | static int do_add(int cmd, char **argv) |
363 | { |
364 | struct ip_tunnel_parm p; |
365 | |
366 | parse_args(argv, cmd, &p); |
367 | |
368 | if (p.iph.ttl && p.iph.frag_off == 0) { |
369 | bb_error_msg_and_die("ttl != 0 and noptmudisc are incompatible"); |
370 | } |
371 | |
372 | switch (p.iph.protocol) { |
373 | case IPPROTO_IPIP: |
374 | return do_add_ioctl(cmd, "tunl0", &p); |
375 | case IPPROTO_GRE: |
376 | return do_add_ioctl(cmd, "gre0", &p); |
377 | case IPPROTO_IPV6: |
378 | return do_add_ioctl(cmd, "sit0", &p); |
379 | default: |
380 | bb_error_msg_and_die("can't determine tunnel mode (ipip, gre or sit)"); |
381 | } |
382 | } |
383 | |
384 | /* Return value becomes exitcode. It's okay to not return at all */ |
385 | static int do_del(char **argv) |
386 | { |
387 | struct ip_tunnel_parm p; |
388 | |
389 | parse_args(argv, SIOCDELTUNNEL, &p); |
390 | |
391 | switch (p.iph.protocol) { |
392 | case IPPROTO_IPIP: |
393 | return do_del_ioctl("tunl0", &p); |
394 | case IPPROTO_GRE: |
395 | return do_del_ioctl("gre0", &p); |
396 | case IPPROTO_IPV6: |
397 | return do_del_ioctl("sit0", &p); |
398 | default: |
399 | return do_del_ioctl(p.name, &p); |
400 | } |
401 | } |
402 | |
403 | static void print_tunnel(struct ip_tunnel_parm *p) |
404 | { |
405 | char s1[256]; |
406 | char s2[256]; |
407 | char s3[64]; |
408 | char s4[64]; |
409 | |
410 | format_host(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1)); |
411 | format_host(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2)); |
412 | inet_ntop(AF_INET, &p->i_key, s3, sizeof(s3)); |
413 | inet_ntop(AF_INET, &p->o_key, s4, sizeof(s4)); |
414 | |
415 | printf("%s: %s/ip remote %s local %s ", |
416 | p->name, |
417 | p->iph.protocol == IPPROTO_IPIP ? "ip" : |
418 | (p->iph.protocol == IPPROTO_GRE ? "gre" : |
419 | (p->iph.protocol == IPPROTO_IPV6 ? "ipv6" : "unknown")), |
420 | p->iph.daddr ? s1 : "any", p->iph.saddr ? s2 : "any"); |
421 | if (p->link) { |
422 | char *n = do_ioctl_get_ifname(p->link); |
423 | if (n) { |
424 | printf(" dev %s ", n); |
425 | free(n); |
426 | } |
427 | } |
428 | if (p->iph.ttl) |
429 | printf(" ttl %d ", p->iph.ttl); |
430 | else |
431 | printf(" ttl inherit "); |
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)); |
440 | } |
441 | if (!(p->iph.frag_off & htons(IP_DF))) |
442 | printf(" nopmtudisc"); |
443 | |
444 | if ((p->i_flags & GRE_KEY) && (p->o_flags & GRE_KEY) && p->o_key == p->i_key) |
445 | printf(" key %s", s3); |
446 | else if ((p->i_flags | p->o_flags) & GRE_KEY) { |
447 | if (p->i_flags & GRE_KEY) |
448 | printf(" ikey %s ", s3); |
449 | if (p->o_flags & GRE_KEY) |
450 | printf(" okey %s ", s4); |
451 | } |
452 | |
453 | if (p->i_flags & GRE_SEQ) |
454 | printf("%c Drop packets out of sequence.\n", _SL_); |
455 | if (p->i_flags & GRE_CSUM) |
456 | printf("%c Checksum in received packet is required.", _SL_); |
457 | if (p->o_flags & GRE_SEQ) |
458 | printf("%c Sequence packets on output.", _SL_); |
459 | if (p->o_flags & GRE_CSUM) |
460 | printf("%c Checksum output packets.", _SL_); |
461 | } |
462 | |
463 | static void do_tunnels_list(struct ip_tunnel_parm *p) |
464 | { |
465 | char name[IFNAMSIZ]; |
466 | unsigned long rx_bytes, rx_packets, rx_errs, rx_drops, |
467 | rx_fifo, rx_frame, |
468 | tx_bytes, tx_packets, tx_errs, tx_drops, |
469 | tx_fifo, tx_colls, tx_carrier, rx_multi; |
470 | int type; |
471 | struct ip_tunnel_parm p1; |
472 | char buf[512]; |
473 | FILE *fp = fopen_or_warn("/proc/net/dev", "r"); |
474 | |
475 | if (fp == NULL) { |
476 | return; |
477 | } |
478 | /* skip headers */ |
479 | fgets(buf, sizeof(buf), fp); |
480 | fgets(buf, sizeof(buf), fp); |
481 | |
482 | while (fgets(buf, sizeof(buf), fp) != NULL) { |
483 | char *ptr; |
484 | |
485 | /*buf[sizeof(buf) - 1] = 0; - fgets is safe anyway */ |
486 | ptr = strchr(buf, ':'); |
487 | if (ptr == NULL || |
488 | (*ptr++ = 0, sscanf(buf, "%s", name) != 1)) { |
489 | bb_error_msg("wrong format of /proc/net/dev"); |
490 | return; |
491 | } |
492 | if (sscanf(ptr, "%lu%lu%lu%lu%lu%lu%lu%*d%lu%lu%lu%lu%lu%lu%lu", |
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 | bb_error_msg("can't get type of [%s]", 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 | bb_putchar('\n'); |
518 | } |
519 | } |
520 | |
521 | /* Return value becomes exitcode. It's okay to not return at all */ |
522 | static int do_show(char **argv) |
523 | { |
524 | int err; |
525 | struct ip_tunnel_parm p; |
526 | |
527 | parse_args(argv, SIOCGETTUNNEL, &p); |
528 | |
529 | switch (p.iph.protocol) { |
530 | case IPPROTO_IPIP: |
531 | err = do_get_ioctl(p.name[0] ? p.name : "tunl0", &p); |
532 | break; |
533 | case IPPROTO_GRE: |
534 | err = do_get_ioctl(p.name[0] ? p.name : "gre0", &p); |
535 | break; |
536 | case IPPROTO_IPV6: |
537 | err = do_get_ioctl(p.name[0] ? p.name : "sit0", &p); |
538 | break; |
539 | default: |
540 | do_tunnels_list(&p); |
541 | return 0; |
542 | } |
543 | if (err) |
544 | return -1; |
545 | |
546 | print_tunnel(&p); |
547 | bb_putchar('\n'); |
548 | return 0; |
549 | } |
550 | |
551 | /* Return value becomes exitcode. It's okay to not return at all */ |
552 | int do_iptunnel(char **argv) |
553 | { |
554 | static const char keywords[] ALIGN1 = |
555 | "add\0""change\0""delete\0""show\0""list\0""lst\0"; |
556 | enum { ARG_add = 0, ARG_change, ARG_del, ARG_show, ARG_list, ARG_lst }; |
557 | int key; |
558 | |
559 | if (*argv) { |
560 | key = index_in_substrings(keywords, *argv); |
561 | if (key < 0) |
562 | bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name); |
563 | argv++; |
564 | if (key == ARG_add) |
565 | return do_add(SIOCADDTUNNEL, argv); |
566 | if (key == ARG_change) |
567 | return do_add(SIOCCHGTUNNEL, argv); |
568 | if (key == ARG_del) |
569 | return do_del(argv); |
570 | } |
571 | return do_show(argv); |
572 | } |