blob: eb136e435d837d9b46ccae1d608aeb887b80a977
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
4 | * |
5 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
6 | * |
7 | * Changes: |
8 | * |
9 | * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses |
10 | * Rani Assaf <rani@magic.metawire.com> 980930: do not allow key for ipip/sit |
11 | * Phil Karn <karn@ka9q.ampr.org> 990408: "pmtudisc" flag |
12 | */ |
13 | |
14 | #include <netinet/ip.h> |
15 | #include <net/if.h> |
16 | #include <net/if_arp.h> |
17 | #include <asm/types.h> |
18 | |
19 | #ifndef __constant_htons |
20 | #define __constant_htons htons |
21 | #endif |
22 | |
23 | // FYI: #define SIOCDEVPRIVATE 0x89F0 |
24 | |
25 | /* From linux/if_tunnel.h. #including it proved troublesome |
26 | * (redefiniton errors due to name collisions in linux/ and net[inet]/) */ |
27 | #define SIOCGETTUNNEL (SIOCDEVPRIVATE + 0) |
28 | #define SIOCADDTUNNEL (SIOCDEVPRIVATE + 1) |
29 | #define SIOCDELTUNNEL (SIOCDEVPRIVATE + 2) |
30 | #define SIOCCHGTUNNEL (SIOCDEVPRIVATE + 3) |
31 | //#define SIOCGETPRL (SIOCDEVPRIVATE + 4) |
32 | //#define SIOCADDPRL (SIOCDEVPRIVATE + 5) |
33 | //#define SIOCDELPRL (SIOCDEVPRIVATE + 6) |
34 | //#define SIOCCHGPRL (SIOCDEVPRIVATE + 7) |
35 | #define GRE_CSUM __constant_htons(0x8000) |
36 | //#define GRE_ROUTING __constant_htons(0x4000) |
37 | #define GRE_KEY __constant_htons(0x2000) |
38 | #define GRE_SEQ __constant_htons(0x1000) |
39 | //#define GRE_STRICT __constant_htons(0x0800) |
40 | //#define GRE_REC __constant_htons(0x0700) |
41 | //#define GRE_FLAGS __constant_htons(0x00F8) |
42 | //#define GRE_VERSION __constant_htons(0x0007) |
43 | struct ip_tunnel_parm { |
44 | char name[IFNAMSIZ]; |
45 | int link; |
46 | uint16_t i_flags; |
47 | uint16_t o_flags; |
48 | uint32_t i_key; |
49 | uint32_t o_key; |
50 | struct iphdr iph; |
51 | }; |
52 | /* SIT-mode i_flags */ |
53 | //#define SIT_ISATAP 0x0001 |
54 | //struct ip_tunnel_prl { |
55 | // uint32_t addr; |
56 | // uint16_t flags; |
57 | // uint16_t __reserved; |
58 | // uint32_t datalen; |
59 | // uint32_t __reserved2; |
60 | // /* data follows */ |
61 | //}; |
62 | ///* PRL flags */ |
63 | //#define PRL_DEFAULT 0x0001 |
64 | |
65 | #include "ip_common.h" /* #include "libbb.h" is inside */ |
66 | #include "rt_names.h" |
67 | #include "utils.h" |
68 | |
69 | |
70 | /* Dies on error */ |
71 | static int do_ioctl_get_ifindex(char *dev) |
72 | { |
73 | struct ifreq ifr; |
74 | int fd; |
75 | |
76 | strncpy_IFNAMSIZ(ifr.ifr_name, dev); |
77 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
78 | xioctl(fd, SIOCGIFINDEX, &ifr); |
79 | close(fd); |
80 | return ifr.ifr_ifindex; |
81 | } |
82 | |
83 | static int do_ioctl_get_iftype(char *dev) |
84 | { |
85 | struct ifreq ifr; |
86 | int fd; |
87 | int err; |
88 | |
89 | strncpy_IFNAMSIZ(ifr.ifr_name, dev); |
90 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
91 | err = ioctl_or_warn(fd, SIOCGIFHWADDR, &ifr); |
92 | close(fd); |
93 | return err ? -1 : ifr.ifr_addr.sa_family; |
94 | } |
95 | |
96 | static char *do_ioctl_get_ifname(int idx) |
97 | { |
98 | struct ifreq ifr; |
99 | int fd; |
100 | int err; |
101 | |
102 | ifr.ifr_ifindex = idx; |
103 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
104 | err = ioctl_or_warn(fd, SIOCGIFNAME, &ifr); |
105 | close(fd); |
106 | return err ? NULL : xstrndup(ifr.ifr_name, sizeof(ifr.ifr_name)); |
107 | } |
108 | |
109 | static int do_get_ioctl(const char *basedev, struct ip_tunnel_parm *p) |
110 | { |
111 | struct ifreq ifr; |
112 | int fd; |
113 | int err; |
114 | |
115 | strncpy_IFNAMSIZ(ifr.ifr_name, basedev); |
116 | ifr.ifr_ifru.ifru_data = (void*)p; |
117 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
118 | err = ioctl_or_warn(fd, SIOCGETTUNNEL, &ifr); |
119 | close(fd); |
120 | return err; |
121 | } |
122 | |
123 | /* Dies on error, otherwise returns 0 */ |
124 | static int do_add_ioctl(int cmd, const char *basedev, struct ip_tunnel_parm *p) |
125 | { |
126 | struct ifreq ifr; |
127 | int fd; |
128 | |
129 | if (cmd == SIOCCHGTUNNEL && p->name[0]) { |
130 | strncpy_IFNAMSIZ(ifr.ifr_name, p->name); |
131 | } else { |
132 | strncpy_IFNAMSIZ(ifr.ifr_name, basedev); |
133 | } |
134 | ifr.ifr_ifru.ifru_data = (void*)p; |
135 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
136 | #if ENABLE_IOCTL_HEX2STR_ERROR |
137 | /* #define magic will turn ioctl# into string */ |
138 | if (cmd == SIOCCHGTUNNEL) |
139 | xioctl(fd, SIOCCHGTUNNEL, &ifr); |
140 | else |
141 | xioctl(fd, SIOCADDTUNNEL, &ifr); |
142 | #else |
143 | xioctl(fd, cmd, &ifr); |
144 | #endif |
145 | close(fd); |
146 | return 0; |
147 | } |
148 | |
149 | /* Dies on error, otherwise returns 0 */ |
150 | static int do_del_ioctl(const char *basedev, struct ip_tunnel_parm *p) |
151 | { |
152 | struct ifreq ifr; |
153 | int fd; |
154 | |
155 | if (p->name[0]) { |
156 | strncpy_IFNAMSIZ(ifr.ifr_name, p->name); |
157 | } else { |
158 | strncpy_IFNAMSIZ(ifr.ifr_name, basedev); |
159 | } |
160 | ifr.ifr_ifru.ifru_data = (void*)p; |
161 | fd = xsocket(AF_INET, SOCK_DGRAM, 0); |
162 | xioctl(fd, SIOCDELTUNNEL, &ifr); |
163 | close(fd); |
164 | return 0; |
165 | } |
166 | |
167 | /* Dies on error */ |
168 | static void parse_args(char **argv, int cmd, struct ip_tunnel_parm *p) |
169 | { |
170 | static const char keywords[] ALIGN1 = |
171 | "mode\0""ipip\0""ip/ip\0""gre\0""gre/ip\0""sit\0""ipv6/ip\0" |
172 | "key\0""ikey\0""okey\0""seq\0""iseq\0""oseq\0" |
173 | "csum\0""icsum\0""ocsum\0""nopmtudisc\0""pmtudisc\0" |
174 | "remote\0""any\0""local\0""dev\0" |
175 | "ttl\0""inherit\0""tos\0""dsfield\0" |
176 | "name\0"; |
177 | enum { |
178 | ARG_mode, ARG_ipip, ARG_ip_ip, ARG_gre, ARG_gre_ip, ARG_sit, ARG_ip6_ip, |
179 | ARG_key, ARG_ikey, ARG_okey, ARG_seq, ARG_iseq, ARG_oseq, |
180 | ARG_csum, ARG_icsum, ARG_ocsum, ARG_nopmtudisc, ARG_pmtudisc, |
181 | ARG_remote, ARG_any, ARG_local, ARG_dev, |
182 | ARG_ttl, ARG_inherit, ARG_tos, ARG_dsfield, |
183 | ARG_name |
184 | }; |
185 | int count = 0; |
186 | char medium[IFNAMSIZ]; |
187 | int key; |
188 | |
189 | memset(p, 0, sizeof(*p)); |
190 | medium[0] = '\0'; |
191 | |
192 | p->iph.version = 4; |
193 | p->iph.ihl = 5; |
194 | #ifndef IP_DF |
195 | #define IP_DF 0x4000 /* Flag: "Don't Fragment" */ |
196 | #endif |
197 | p->iph.frag_off = htons(IP_DF); |
198 | |
199 | while (*argv) { |
200 | key = index_in_strings(keywords, *argv); |
201 | if (key == ARG_mode) { |
202 | NEXT_ARG(); |
203 | key = index_in_strings(keywords, *argv); |
204 | if (key == ARG_ipip || |
205 | key == ARG_ip_ip |
206 | ) { |
207 | if (p->iph.protocol && p->iph.protocol != IPPROTO_IPIP) { |
208 | bb_error_msg_and_die("%s tunnel mode", "you managed to ask for more than one"); |
209 | } |
210 | p->iph.protocol = IPPROTO_IPIP; |
211 | } else if (key == ARG_gre || |
212 | key == ARG_gre_ip |
213 | ) { |
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 | ) { |
221 | if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) { |
222 | bb_error_msg_and_die("%s tunnel mode", "you managed to ask for more than one"); |
223 | } |
224 | p->iph.protocol = IPPROTO_IPV6; |
225 | } else { |
226 | bb_error_msg_and_die("%s tunnel mode", "can't guess"); |
227 | } |
228 | } else if (key == ARG_key) { |
229 | unsigned uval; |
230 | NEXT_ARG(); |
231 | p->i_flags |= GRE_KEY; |
232 | p->o_flags |= GRE_KEY; |
233 | if (strchr(*argv, '.')) |
234 | p->i_key = p->o_key = get_addr32(*argv); |
235 | else { |
236 | uval = get_unsigned(*argv, "key"); |
237 | p->i_key = p->o_key = htonl(uval); |
238 | } |
239 | } else if (key == ARG_ikey) { |
240 | unsigned uval; |
241 | NEXT_ARG(); |
242 | p->i_flags |= GRE_KEY; |
243 | if (strchr(*argv, '.')) |
244 | p->o_key = get_addr32(*argv); |
245 | else { |
246 | uval = get_unsigned(*argv, "ikey"); |
247 | p->i_key = htonl(uval); |
248 | } |
249 | } else if (key == ARG_okey) { |
250 | unsigned uval; |
251 | NEXT_ARG(); |
252 | p->o_flags |= GRE_KEY; |
253 | if (strchr(*argv, '.')) |
254 | p->o_key = get_addr32(*argv); |
255 | else { |
256 | uval = get_unsigned(*argv, "okey"); |
257 | p->o_key = htonl(uval); |
258 | } |
259 | } else if (key == ARG_seq) { |
260 | p->i_flags |= GRE_SEQ; |
261 | p->o_flags |= GRE_SEQ; |
262 | } else if (key == ARG_iseq) { |
263 | p->i_flags |= GRE_SEQ; |
264 | } else if (key == ARG_oseq) { |
265 | p->o_flags |= GRE_SEQ; |
266 | } else if (key == ARG_csum) { |
267 | p->i_flags |= GRE_CSUM; |
268 | p->o_flags |= GRE_CSUM; |
269 | } else if (key == ARG_icsum) { |
270 | p->i_flags |= GRE_CSUM; |
271 | } else if (key == ARG_ocsum) { |
272 | p->o_flags |= GRE_CSUM; |
273 | } else if (key == ARG_nopmtudisc) { |
274 | p->iph.frag_off = 0; |
275 | } else if (key == ARG_pmtudisc) { |
276 | p->iph.frag_off = htons(IP_DF); |
277 | } else if (key == ARG_remote) { |
278 | NEXT_ARG(); |
279 | key = index_in_strings(keywords, *argv); |
280 | if (key != ARG_any) |
281 | p->iph.daddr = get_addr32(*argv); |
282 | } else if (key == ARG_local) { |
283 | NEXT_ARG(); |
284 | key = index_in_strings(keywords, *argv); |
285 | if (key != ARG_any) |
286 | p->iph.saddr = get_addr32(*argv); |
287 | } else if (key == ARG_dev) { |
288 | NEXT_ARG(); |
289 | strncpy_IFNAMSIZ(medium, *argv); |
290 | } else if (key == ARG_ttl) { |
291 | unsigned uval; |
292 | NEXT_ARG(); |
293 | key = index_in_strings(keywords, *argv); |
294 | if (key != ARG_inherit) { |
295 | uval = get_unsigned(*argv, "TTL"); |
296 | if (uval > 255) |
297 | invarg_1_to_2(*argv, "TTL"); |
298 | p->iph.ttl = uval; |
299 | } |
300 | } else if (key == ARG_tos || |
301 | key == ARG_dsfield |
302 | ) { |
303 | uint32_t uval; |
304 | NEXT_ARG(); |
305 | key = index_in_strings(keywords, *argv); |
306 | if (key != ARG_inherit) { |
307 | if (rtnl_dsfield_a2n(&uval, *argv)) |
308 | invarg_1_to_2(*argv, "TOS"); |
309 | p->iph.tos = uval; |
310 | } else |
311 | p->iph.tos = 1; |
312 | } else { |
313 | if (key == ARG_name) { |
314 | NEXT_ARG(); |
315 | } |
316 | if (p->name[0]) |
317 | duparg2("name", *argv); |
318 | strncpy_IFNAMSIZ(p->name, *argv); |
319 | if (cmd == SIOCCHGTUNNEL && count == 0) { |
320 | struct ip_tunnel_parm old_p; |
321 | memset(&old_p, 0, sizeof(old_p)); |
322 | if (do_get_ioctl(*argv, &old_p)) |
323 | exit(EXIT_FAILURE); |
324 | *p = old_p; |
325 | } |
326 | } |
327 | count++; |
328 | argv++; |
329 | } |
330 | |
331 | if (p->iph.protocol == 0) { |
332 | if (memcmp(p->name, "gre", 3) == 0) |
333 | p->iph.protocol = IPPROTO_GRE; |
334 | else if (memcmp(p->name, "ipip", 4) == 0) |
335 | p->iph.protocol = IPPROTO_IPIP; |
336 | else if (memcmp(p->name, "sit", 3) == 0) |
337 | p->iph.protocol = IPPROTO_IPV6; |
338 | } |
339 | |
340 | if (p->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) { |
341 | if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) { |
342 | bb_error_msg_and_die("keys are not allowed with ipip and sit"); |
343 | } |
344 | } |
345 | |
346 | if (medium[0]) { |
347 | p->link = do_ioctl_get_ifindex(medium); |
348 | } |
349 | |
350 | if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) { |
351 | p->i_key = p->iph.daddr; |
352 | p->i_flags |= GRE_KEY; |
353 | } |
354 | if (p->o_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) { |
355 | p->o_key = p->iph.daddr; |
356 | p->o_flags |= GRE_KEY; |
357 | } |
358 | if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) { |
359 | bb_error_msg_and_die("broadcast tunnel requires a source address"); |
360 | } |
361 | } |
362 | |
363 | /* Return value becomes exitcode. It's okay to not return at all */ |
364 | static int do_add(int cmd, char **argv) |
365 | { |
366 | struct ip_tunnel_parm p; |
367 | |
368 | parse_args(argv, cmd, &p); |
369 | |
370 | if (p.iph.ttl && p.iph.frag_off == 0) { |
371 | bb_error_msg_and_die("ttl != 0 and noptmudisc are incompatible"); |
372 | } |
373 | |
374 | switch (p.iph.protocol) { |
375 | case IPPROTO_IPIP: |
376 | return do_add_ioctl(cmd, "tunl0", &p); |
377 | case IPPROTO_GRE: |
378 | return do_add_ioctl(cmd, "gre0", &p); |
379 | case IPPROTO_IPV6: |
380 | return do_add_ioctl(cmd, "sit0", &p); |
381 | default: |
382 | bb_error_msg_and_die("can't determine tunnel mode (ipip, gre or sit)"); |
383 | } |
384 | } |
385 | |
386 | /* Return value becomes exitcode. It's okay to not return at all */ |
387 | static int do_del(char **argv) |
388 | { |
389 | struct ip_tunnel_parm p; |
390 | |
391 | parse_args(argv, SIOCDELTUNNEL, &p); |
392 | |
393 | switch (p.iph.protocol) { |
394 | case IPPROTO_IPIP: |
395 | return do_del_ioctl("tunl0", &p); |
396 | case IPPROTO_GRE: |
397 | return do_del_ioctl("gre0", &p); |
398 | case IPPROTO_IPV6: |
399 | return do_del_ioctl("sit0", &p); |
400 | default: |
401 | return do_del_ioctl(p.name, &p); |
402 | } |
403 | } |
404 | |
405 | static void print_tunnel(struct ip_tunnel_parm *p) |
406 | { |
407 | char s3[INET_ADDRSTRLEN]; |
408 | char s4[INET_ADDRSTRLEN]; |
409 | |
410 | printf("%s: %s/ip remote %s local %s ", |
411 | p->name, |
412 | p->iph.protocol == IPPROTO_IPIP ? "ip" : |
413 | p->iph.protocol == IPPROTO_GRE ? "gre" : |
414 | p->iph.protocol == IPPROTO_IPV6 ? "ipv6" : |
415 | "unknown", |
416 | p->iph.daddr ? format_host(AF_INET, 4, &p->iph.daddr) : "any", |
417 | p->iph.saddr ? format_host(AF_INET, 4, &p->iph.saddr) : "any" |
418 | ); |
419 | if (p->link) { |
420 | char *n = do_ioctl_get_ifname(p->link); |
421 | if (n) { |
422 | printf(" dev %s ", n); |
423 | free(n); |
424 | } |
425 | } |
426 | if (p->iph.ttl) |
427 | printf(" ttl %d ", p->iph.ttl); |
428 | else |
429 | printf(" ttl inherit "); |
430 | if (p->iph.tos) { |
431 | printf(" tos"); |
432 | if (p->iph.tos & 1) |
433 | printf(" inherit"); |
434 | if (p->iph.tos & ~1) |
435 | printf("%c%s ", p->iph.tos & 1 ? '/' : ' ', |
436 | rtnl_dsfield_n2a(p->iph.tos & ~1)); |
437 | } |
438 | if (!(p->iph.frag_off & htons(IP_DF))) |
439 | printf(" nopmtudisc"); |
440 | |
441 | inet_ntop(AF_INET, &p->i_key, s3, sizeof(s3)); |
442 | inet_ntop(AF_INET, &p->o_key, s4, sizeof(s4)); |
443 | if ((p->i_flags & GRE_KEY) && (p->o_flags & GRE_KEY) && p->o_key == p->i_key) |
444 | printf(" key %s", s3); |
445 | else { |
446 | if (p->i_flags & GRE_KEY) |
447 | printf(" ikey %s ", s3); |
448 | if (p->o_flags & GRE_KEY) |
449 | printf(" okey %s ", s4); |
450 | } |
451 | |
452 | if (p->i_flags & GRE_SEQ) |
453 | printf("%c Drop packets out of sequence.\n", _SL_); |
454 | if (p->i_flags & GRE_CSUM) |
455 | printf("%c Checksum in received packet is required.", _SL_); |
456 | if (p->o_flags & GRE_SEQ) |
457 | printf("%c Sequence packets on output.", _SL_); |
458 | if (p->o_flags & GRE_CSUM) |
459 | printf("%c Checksum output packets.", _SL_); |
460 | } |
461 | |
462 | static void do_tunnels_list(struct ip_tunnel_parm *p) |
463 | { |
464 | char name[IFNAMSIZ]; |
465 | unsigned long rx_bytes, rx_packets, rx_errs, rx_drops, |
466 | rx_fifo, rx_frame, |
467 | tx_bytes, tx_packets, tx_errs, tx_drops, |
468 | tx_fifo, tx_colls, tx_carrier, rx_multi; |
469 | int type; |
470 | struct ip_tunnel_parm p1; |
471 | char buf[512]; |
472 | FILE *fp = fopen_or_warn("/proc/net/dev", "r"); |
473 | |
474 | if (fp == NULL) { |
475 | return; |
476 | } |
477 | /* skip headers */ |
478 | fgets(buf, sizeof(buf), fp); |
479 | fgets(buf, sizeof(buf), fp); |
480 | |
481 | while (fgets(buf, sizeof(buf), fp) != NULL) { |
482 | char *ptr; |
483 | |
484 | /*buf[sizeof(buf) - 1] = 0; - fgets is safe anyway */ |
485 | ptr = strchr(buf, ':'); |
486 | if (ptr == NULL || |
487 | (*ptr++ = 0, sscanf(buf, "%s", name) != 1) |
488 | ) { |
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 | ) { |
516 | continue; |
517 | } |
518 | print_tunnel(&p1); |
519 | bb_putchar('\n'); |
520 | } |
521 | } |
522 | |
523 | /* Return value becomes exitcode. It's okay to not return at all */ |
524 | static int do_show(char **argv) |
525 | { |
526 | int err; |
527 | struct ip_tunnel_parm p; |
528 | |
529 | parse_args(argv, SIOCGETTUNNEL, &p); |
530 | |
531 | switch (p.iph.protocol) { |
532 | case IPPROTO_IPIP: |
533 | err = do_get_ioctl(p.name[0] ? p.name : "tunl0", &p); |
534 | break; |
535 | case IPPROTO_GRE: |
536 | err = do_get_ioctl(p.name[0] ? p.name : "gre0", &p); |
537 | break; |
538 | case IPPROTO_IPV6: |
539 | err = do_get_ioctl(p.name[0] ? p.name : "sit0", &p); |
540 | break; |
541 | default: |
542 | do_tunnels_list(&p); |
543 | return 0; |
544 | } |
545 | if (err) |
546 | return -1; |
547 | |
548 | print_tunnel(&p); |
549 | bb_putchar('\n'); |
550 | return 0; |
551 | } |
552 | |
553 | /* Return value becomes exitcode. It's okay to not return at all */ |
554 | int FAST_FUNC do_iptunnel(char **argv) |
555 | { |
556 | static const char keywords[] ALIGN1 = |
557 | "add\0""change\0""delete\0""show\0""list\0""lst\0"; |
558 | enum { ARG_add = 0, ARG_change, ARG_del, ARG_show, ARG_list, ARG_lst }; |
559 | |
560 | if (*argv) { |
561 | int key = index_in_substrings(keywords, *argv); |
562 | if (key < 0) |
563 | invarg_1_to_2(*argv, applet_name); |
564 | argv++; |
565 | if (key == ARG_add) |
566 | return do_add(SIOCADDTUNNEL, argv); |
567 | if (key == ARG_change) |
568 | return do_add(SIOCCHGTUNNEL, argv); |
569 | if (key == ARG_del) |
570 | return do_del(argv); |
571 | } |
572 | return do_show(argv); |
573 | } |
574 |