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(*argv, "TTL must be <=255");
|
---|
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(*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 s1[256];
|
---|
408 | char s2[256];
|
---|
409 | char s3[64];
|
---|
410 | char s4[64];
|
---|
411 |
|
---|
412 | format_host(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1));
|
---|
413 | format_host(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2));
|
---|
414 | inet_ntop(AF_INET, &p->i_key, s3, sizeof(s3));
|
---|
415 | inet_ntop(AF_INET, &p->o_key, s4, sizeof(s4));
|
---|
416 |
|
---|
417 | printf("%s: %s/ip remote %s local %s ",
|
---|
418 | p->name,
|
---|
419 | p->iph.protocol == IPPROTO_IPIP ? "ip" :
|
---|
420 | (p->iph.protocol == IPPROTO_GRE ? "gre" :
|
---|
421 | (p->iph.protocol == IPPROTO_IPV6 ? "ipv6" : "unknown")),
|
---|
422 | p->iph.daddr ? s1 : "any", p->iph.saddr ? s2 : "any");
|
---|
423 | if (p->link) {
|
---|
424 | char *n = do_ioctl_get_ifname(p->link);
|
---|
425 | if (n) {
|
---|
426 | printf(" dev %s ", n);
|
---|
427 | free(n);
|
---|
428 | }
|
---|
429 | }
|
---|
430 | if (p->iph.ttl)
|
---|
431 | printf(" ttl %d ", p->iph.ttl);
|
---|
432 | else
|
---|
433 | printf(" ttl inherit ");
|
---|
434 | if (p->iph.tos) {
|
---|
435 | SPRINT_BUF(b1);
|
---|
436 | printf(" tos");
|
---|
437 | if (p->iph.tos & 1)
|
---|
438 | printf(" inherit");
|
---|
439 | if (p->iph.tos & ~1)
|
---|
440 | printf("%c%s ", p->iph.tos & 1 ? '/' : ' ',
|
---|
441 | rtnl_dsfield_n2a(p->iph.tos & ~1, b1));
|
---|
442 | }
|
---|
443 | if (!(p->iph.frag_off & htons(IP_DF)))
|
---|
444 | printf(" nopmtudisc");
|
---|
445 |
|
---|
446 | if ((p->i_flags & GRE_KEY) && (p->o_flags & GRE_KEY) && p->o_key == p->i_key)
|
---|
447 | printf(" key %s", s3);
|
---|
448 | else if ((p->i_flags | p->o_flags) & GRE_KEY) {
|
---|
449 | if (p->i_flags & GRE_KEY)
|
---|
450 | printf(" ikey %s ", s3);
|
---|
451 | if (p->o_flags & GRE_KEY)
|
---|
452 | printf(" okey %s ", s4);
|
---|
453 | }
|
---|
454 |
|
---|
455 | if (p->i_flags & GRE_SEQ)
|
---|
456 | printf("%c Drop packets out of sequence.\n", _SL_);
|
---|
457 | if (p->i_flags & GRE_CSUM)
|
---|
458 | printf("%c Checksum in received packet is required.", _SL_);
|
---|
459 | if (p->o_flags & GRE_SEQ)
|
---|
460 | printf("%c Sequence packets on output.", _SL_);
|
---|
461 | if (p->o_flags & GRE_CSUM)
|
---|
462 | printf("%c Checksum output packets.", _SL_);
|
---|
463 | }
|
---|
464 |
|
---|
465 | static void do_tunnels_list(struct ip_tunnel_parm *p)
|
---|
466 | {
|
---|
467 | char name[IFNAMSIZ];
|
---|
468 | unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
|
---|
469 | rx_fifo, rx_frame,
|
---|
470 | tx_bytes, tx_packets, tx_errs, tx_drops,
|
---|
471 | tx_fifo, tx_colls, tx_carrier, rx_multi;
|
---|
472 | int type;
|
---|
473 | struct ip_tunnel_parm p1;
|
---|
474 | char buf[512];
|
---|
475 | FILE *fp = fopen_or_warn("/proc/net/dev", "r");
|
---|
476 |
|
---|
477 | if (fp == NULL) {
|
---|
478 | return;
|
---|
479 | }
|
---|
480 | /* skip headers */
|
---|
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 |
|
---|
487 | /*buf[sizeof(buf) - 1] = 0; - fgets is safe anyway */
|
---|
488 | ptr = strchr(buf, ':');
|
---|
489 | if (ptr == NULL ||
|
---|
490 | (*ptr++ = 0, sscanf(buf, "%s", name) != 1)
|
---|
491 | ) {
|
---|
492 | bb_error_msg("wrong format of /proc/net/dev");
|
---|
493 | return;
|
---|
494 | }
|
---|
495 | if (sscanf(ptr, "%lu%lu%lu%lu%lu%lu%lu%*d%lu%lu%lu%lu%lu%lu%lu",
|
---|
496 | &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
|
---|
497 | &rx_fifo, &rx_frame, &rx_multi,
|
---|
498 | &tx_bytes, &tx_packets, &tx_errs, &tx_drops,
|
---|
499 | &tx_fifo, &tx_colls, &tx_carrier) != 14)
|
---|
500 | continue;
|
---|
501 | if (p->name[0] && strcmp(p->name, name))
|
---|
502 | continue;
|
---|
503 | type = do_ioctl_get_iftype(name);
|
---|
504 | if (type == -1) {
|
---|
505 | bb_error_msg("can't get type of [%s]", name);
|
---|
506 | continue;
|
---|
507 | }
|
---|
508 | if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
|
---|
509 | continue;
|
---|
510 | memset(&p1, 0, sizeof(p1));
|
---|
511 | if (do_get_ioctl(name, &p1))
|
---|
512 | continue;
|
---|
513 | if ((p->link && p1.link != p->link) ||
|
---|
514 | (p->name[0] && strcmp(p1.name, p->name)) ||
|
---|
515 | (p->iph.daddr && p1.iph.daddr != p->iph.daddr) ||
|
---|
516 | (p->iph.saddr && p1.iph.saddr != p->iph.saddr) ||
|
---|
517 | (p->i_key && p1.i_key != p->i_key)
|
---|
518 | ) {
|
---|
519 | continue;
|
---|
520 | }
|
---|
521 | print_tunnel(&p1);
|
---|
522 | bb_putchar('\n');
|
---|
523 | }
|
---|
524 | }
|
---|
525 |
|
---|
526 | /* Return value becomes exitcode. It's okay to not return at all */
|
---|
527 | static int do_show(char **argv)
|
---|
528 | {
|
---|
529 | int err;
|
---|
530 | struct ip_tunnel_parm p;
|
---|
531 |
|
---|
532 | parse_args(argv, SIOCGETTUNNEL, &p);
|
---|
533 |
|
---|
534 | switch (p.iph.protocol) {
|
---|
535 | case IPPROTO_IPIP:
|
---|
536 | err = do_get_ioctl(p.name[0] ? p.name : "tunl0", &p);
|
---|
537 | break;
|
---|
538 | case IPPROTO_GRE:
|
---|
539 | err = do_get_ioctl(p.name[0] ? p.name : "gre0", &p);
|
---|
540 | break;
|
---|
541 | case IPPROTO_IPV6:
|
---|
542 | err = do_get_ioctl(p.name[0] ? p.name : "sit0", &p);
|
---|
543 | break;
|
---|
544 | default:
|
---|
545 | do_tunnels_list(&p);
|
---|
546 | return 0;
|
---|
547 | }
|
---|
548 | if (err)
|
---|
549 | return -1;
|
---|
550 |
|
---|
551 | print_tunnel(&p);
|
---|
552 | bb_putchar('\n');
|
---|
553 | return 0;
|
---|
554 | }
|
---|
555 |
|
---|
556 | /* Return value becomes exitcode. It's okay to not return at all */
|
---|
557 | int FAST_FUNC do_iptunnel(char **argv)
|
---|
558 | {
|
---|
559 | static const char keywords[] ALIGN1 =
|
---|
560 | "add\0""change\0""delete\0""show\0""list\0""lst\0";
|
---|
561 | enum { ARG_add = 0, ARG_change, ARG_del, ARG_show, ARG_list, ARG_lst };
|
---|
562 |
|
---|
563 | if (*argv) {
|
---|
564 | smalluint key = index_in_substrings(keywords, *argv);
|
---|
565 | if (key > 5)
|
---|
566 | bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
|
---|
567 | argv++;
|
---|
568 | if (key == ARG_add)
|
---|
569 | return do_add(SIOCADDTUNNEL, argv);
|
---|
570 | if (key == ARG_change)
|
---|
571 | return do_add(SIOCCHGTUNNEL, argv);
|
---|
572 | if (key == ARG_del)
|
---|
573 | return do_del(argv);
|
---|
574 | }
|
---|
575 | return do_show(argv);
|
---|
576 | }
|
---|