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Commit | Line | Data |
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580fbd88 DW |
1 | /* |
2 | * iptunnel.c "ip tuntap" | |
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: David Woodhouse <David.Woodhouse@intel.com> | |
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 <linux/if.h> | |
22 | #include <linux/if_tun.h> | |
8960d45f | 23 | #include <linux/if_arp.h> |
580fbd88 DW |
24 | #include <pwd.h> |
25 | #include <grp.h> | |
26 | #include <fcntl.h> | |
27 | #include <dirent.h> | |
28 | #include <errno.h> | |
567e6960 | 29 | #include <glob.h> |
580fbd88 DW |
30 | |
31 | #include "rt_names.h" | |
32 | #include "utils.h" | |
33 | #include "ip_common.h" | |
34 | ||
8960d45f SP |
35 | static const char drv_name[] = "tun"; |
36 | ||
580fbd88 DW |
37 | #define TUNDEV "/dev/net/tun" |
38 | ||
39 | static void usage(void) __attribute__((noreturn)); | |
40 | ||
41 | static void usage(void) | |
42 | { | |
8589eb4e MC |
43 | fprintf(stderr, |
44 | "Usage: ip tuntap { add | del | show | list | lst | help } [ dev PHYS_DEV ]\n" | |
45 | " [ mode { tun | tap } ] [ user USER ] [ group GROUP ]\n" | |
46 | " [ one_queue ] [ pi ] [ vnet_hdr ] [ multi_queue ] [ name NAME ]\n" | |
47 | "\n" | |
48 | "Where: USER := { STRING | NUMBER }\n" | |
49 | " GROUP := { STRING | NUMBER }\n"); | |
580fbd88 DW |
50 | exit(-1); |
51 | } | |
52 | ||
53 | static int tap_add_ioctl(struct ifreq *ifr, uid_t uid, gid_t gid) | |
54 | { | |
1313ceb4 | 55 | int fd; |
580fbd88 DW |
56 | int ret = -1; |
57 | ||
58 | #ifdef IFF_TUN_EXCL | |
59 | ifr->ifr_flags |= IFF_TUN_EXCL; | |
60 | #endif | |
61 | ||
62 | fd = open(TUNDEV, O_RDWR); | |
63 | if (fd < 0) { | |
64 | perror("open"); | |
65 | return -1; | |
66 | } | |
67 | if (ioctl(fd, TUNSETIFF, ifr)) { | |
68 | perror("ioctl(TUNSETIFF)"); | |
69 | goto out; | |
70 | } | |
71 | if (uid != -1 && ioctl(fd, TUNSETOWNER, uid)) { | |
72 | perror("ioctl(TUNSETOWNER)"); | |
73 | goto out; | |
74 | } | |
75 | if (gid != -1 && ioctl(fd, TUNSETGROUP, gid)) { | |
76 | perror("ioctl(TUNSETGROUP)"); | |
77 | goto out; | |
78 | } | |
79 | if (ioctl(fd, TUNSETPERSIST, 1)) { | |
80 | perror("ioctl(TUNSETPERSIST)"); | |
81 | goto out; | |
82 | } | |
83 | ret = 0; | |
84 | out: | |
85 | close(fd); | |
86 | return ret; | |
87 | } | |
88 | ||
89 | static int tap_del_ioctl(struct ifreq *ifr) | |
90 | { | |
91 | int fd = open(TUNDEV, O_RDWR); | |
92 | int ret = -1; | |
93 | ||
94 | if (fd < 0) { | |
95 | perror("open"); | |
96 | return -1; | |
97 | } | |
98 | if (ioctl(fd, TUNSETIFF, ifr)) { | |
99 | perror("ioctl(TUNSETIFF)"); | |
100 | goto out; | |
101 | } | |
102 | if (ioctl(fd, TUNSETPERSIST, 0)) { | |
103 | perror("ioctl(TUNSETPERSIST)"); | |
104 | goto out; | |
105 | } | |
106 | ret = 0; | |
107 | out: | |
108 | close(fd); | |
109 | return ret; | |
110 | ||
111 | } | |
cc28aad1 SH |
112 | static int parse_args(int argc, char **argv, |
113 | struct ifreq *ifr, uid_t *uid, gid_t *gid) | |
580fbd88 DW |
114 | { |
115 | int count = 0; | |
116 | ||
117 | memset(ifr, 0, sizeof(*ifr)); | |
118 | ||
119 | ifr->ifr_flags |= IFF_NO_PI; | |
120 | ||
121 | while (argc > 0) { | |
122 | if (matches(*argv, "mode") == 0) { | |
123 | NEXT_ARG(); | |
124 | if (matches(*argv, "tun") == 0) { | |
125 | if (ifr->ifr_flags & IFF_TAP) { | |
56f5daac | 126 | fprintf(stderr, "You managed to ask for more than one tunnel mode.\n"); |
580fbd88 DW |
127 | exit(-1); |
128 | } | |
129 | ifr->ifr_flags |= IFF_TUN; | |
130 | } else if (matches(*argv, "tap") == 0) { | |
131 | if (ifr->ifr_flags & IFF_TUN) { | |
56f5daac | 132 | fprintf(stderr, "You managed to ask for more than one tunnel mode.\n"); |
580fbd88 DW |
133 | exit(-1); |
134 | } | |
135 | ifr->ifr_flags |= IFF_TAP; | |
136 | } else { | |
56f5daac | 137 | fprintf(stderr, "Unknown tunnel mode \"%s\"\n", *argv); |
580fbd88 DW |
138 | exit(-1); |
139 | } | |
140 | } else if (uid && matches(*argv, "user") == 0) { | |
141 | char *end; | |
142 | unsigned long user; | |
143 | ||
144 | NEXT_ARG(); | |
145 | if (**argv && ((user = strtol(*argv, &end, 10)), !*end)) | |
146 | *uid = user; | |
147 | else { | |
148 | struct passwd *pw = getpwnam(*argv); | |
56f5daac | 149 | |
580fbd88 DW |
150 | if (!pw) { |
151 | fprintf(stderr, "invalid user \"%s\"\n", *argv); | |
152 | exit(-1); | |
153 | } | |
154 | *uid = pw->pw_uid; | |
155 | } | |
156 | } else if (gid && matches(*argv, "group") == 0) { | |
157 | char *end; | |
158 | unsigned long group; | |
159 | ||
160 | NEXT_ARG(); | |
161 | ||
162 | if (**argv && ((group = strtol(*argv, &end, 10)), !*end)) | |
163 | *gid = group; | |
164 | else { | |
165 | struct group *gr = getgrnam(*argv); | |
56f5daac | 166 | |
580fbd88 DW |
167 | if (!gr) { |
168 | fprintf(stderr, "invalid group \"%s\"\n", *argv); | |
169 | exit(-1); | |
170 | } | |
171 | *gid = gr->gr_gid; | |
172 | } | |
173 | } else if (matches(*argv, "pi") == 0) { | |
174 | ifr->ifr_flags &= ~IFF_NO_PI; | |
175 | } else if (matches(*argv, "one_queue") == 0) { | |
176 | ifr->ifr_flags |= IFF_ONE_QUEUE; | |
177 | } else if (matches(*argv, "vnet_hdr") == 0) { | |
178 | ifr->ifr_flags |= IFF_VNET_HDR; | |
c41e038f SN |
179 | } else if (matches(*argv, "multi_queue") == 0) { |
180 | ifr->ifr_flags |= IFF_MULTI_QUEUE; | |
580fbd88 DW |
181 | } else if (matches(*argv, "dev") == 0) { |
182 | NEXT_ARG(); | |
625df645 PS |
183 | if (get_ifname(ifr->ifr_name, *argv)) |
184 | invarg("\"dev\" not a valid ifname", *argv); | |
580fbd88 DW |
185 | } else { |
186 | if (matches(*argv, "name") == 0) { | |
187 | NEXT_ARG(); | |
188 | } else if (matches(*argv, "help") == 0) | |
189 | usage(); | |
190 | if (ifr->ifr_name[0]) | |
191 | duparg2("name", *argv); | |
625df645 PS |
192 | if (get_ifname(ifr->ifr_name, *argv)) |
193 | invarg("\"name\" not a valid ifname", *argv); | |
580fbd88 DW |
194 | } |
195 | count++; | |
196 | argc--; argv++; | |
197 | } | |
198 | ||
f1a505ac | 199 | if (!(ifr->ifr_flags & TUN_TYPE_MASK)) { |
200 | fprintf(stderr, "You failed to specify a tunnel mode\n"); | |
201 | return -1; | |
202 | } | |
203 | ||
580fbd88 DW |
204 | return 0; |
205 | } | |
206 | ||
207 | ||
208 | static int do_add(int argc, char **argv) | |
209 | { | |
210 | struct ifreq ifr; | |
211 | uid_t uid = -1; | |
212 | gid_t gid = -1; | |
213 | ||
214 | if (parse_args(argc, argv, &ifr, &uid, &gid) < 0) | |
215 | return -1; | |
216 | ||
580fbd88 DW |
217 | return tap_add_ioctl(&ifr, uid, gid); |
218 | } | |
219 | ||
220 | static int do_del(int argc, char **argv) | |
221 | { | |
222 | struct ifreq ifr; | |
223 | ||
224 | if (parse_args(argc, argv, &ifr, NULL, NULL) < 0) | |
225 | return -1; | |
226 | ||
227 | return tap_del_ioctl(&ifr); | |
228 | } | |
229 | ||
580fbd88 DW |
230 | static void print_flags(long flags) |
231 | { | |
689bef5d SH |
232 | open_json_array(PRINT_JSON, "flags"); |
233 | ||
580fbd88 | 234 | if (flags & IFF_TUN) |
689bef5d | 235 | print_string(PRINT_ANY, NULL, " %s", "tun"); |
580fbd88 DW |
236 | |
237 | if (flags & IFF_TAP) | |
689bef5d | 238 | print_string(PRINT_ANY, NULL, " %s", "tap"); |
580fbd88 DW |
239 | |
240 | if (!(flags & IFF_NO_PI)) | |
689bef5d | 241 | print_string(PRINT_ANY, NULL, " %s", "pi"); |
580fbd88 DW |
242 | |
243 | if (flags & IFF_ONE_QUEUE) | |
689bef5d | 244 | print_string(PRINT_ANY, NULL, " %s", "one_queue"); |
580fbd88 DW |
245 | |
246 | if (flags & IFF_VNET_HDR) | |
689bef5d SH |
247 | print_string(PRINT_ANY, NULL, " %s", "vnet_hdr"); |
248 | ||
249 | if (flags & IFF_PERSIST) | |
250 | print_string(PRINT_ANY, NULL, " %s", "persist"); | |
251 | ||
252 | if (!(flags & IFF_NOFILTER)) | |
253 | print_string(PRINT_ANY, NULL, " %s", "filter"); | |
580fbd88 | 254 | |
689bef5d SH |
255 | flags &= ~(IFF_TUN | IFF_TAP | IFF_NO_PI | IFF_ONE_QUEUE | |
256 | IFF_VNET_HDR | IFF_PERSIST | IFF_NOFILTER); | |
580fbd88 | 257 | if (flags) |
90c5c969 | 258 | print_0xhex(PRINT_ANY, NULL, "%#llx", flags); |
689bef5d SH |
259 | |
260 | close_json_array(PRINT_JSON, NULL); | |
580fbd88 DW |
261 | } |
262 | ||
567e6960 HFS |
263 | static char *pid_name(pid_t pid) |
264 | { | |
265 | char *comm; | |
266 | FILE *f; | |
267 | int err; | |
268 | ||
269 | err = asprintf(&comm, "/proc/%d/comm", pid); | |
270 | if (err < 0) | |
271 | return NULL; | |
272 | ||
273 | f = fopen(comm, "r"); | |
274 | free(comm); | |
275 | if (!f) { | |
276 | perror("fopen"); | |
277 | return NULL; | |
278 | } | |
279 | ||
280 | if (fscanf(f, "%ms\n", &comm) != 1) { | |
281 | perror("fscanf"); | |
282 | comm = NULL; | |
283 | } | |
284 | ||
285 | ||
286 | if (fclose(f)) | |
287 | perror("fclose"); | |
288 | ||
289 | return comm; | |
290 | } | |
291 | ||
292 | static void show_processes(const char *name) | |
293 | { | |
294 | glob_t globbuf = { }; | |
295 | char **fd_path; | |
296 | int err; | |
297 | ||
298 | err = glob("/proc/[0-9]*/fd/[0-9]*", GLOB_NOSORT, | |
299 | NULL, &globbuf); | |
300 | if (err) | |
301 | return; | |
302 | ||
689bef5d SH |
303 | open_json_array(PRINT_JSON, "processes"); |
304 | ||
567e6960 HFS |
305 | fd_path = globbuf.gl_pathv; |
306 | while (*fd_path) { | |
307 | const char *dev_net_tun = "/dev/net/tun"; | |
308 | const size_t linkbuf_len = strlen(dev_net_tun) + 2; | |
309 | char linkbuf[linkbuf_len], *fdinfo; | |
310 | int pid, fd; | |
311 | FILE *f; | |
312 | ||
313 | if (sscanf(*fd_path, "/proc/%d/fd/%d", &pid, &fd) != 2) | |
314 | goto next; | |
315 | ||
316 | if (pid == getpid()) | |
317 | goto next; | |
318 | ||
319 | err = readlink(*fd_path, linkbuf, linkbuf_len - 1); | |
320 | if (err < 0) { | |
321 | perror("readlink"); | |
322 | goto next; | |
323 | } | |
324 | linkbuf[err] = '\0'; | |
325 | if (strcmp(dev_net_tun, linkbuf)) | |
326 | goto next; | |
327 | ||
328 | if (asprintf(&fdinfo, "/proc/%d/fdinfo/%d", pid, fd) < 0) | |
329 | goto next; | |
330 | ||
331 | f = fopen(fdinfo, "r"); | |
332 | free(fdinfo); | |
333 | if (!f) { | |
334 | perror("fopen"); | |
335 | goto next; | |
336 | } | |
337 | ||
338 | while (!feof(f)) { | |
339 | char *key = NULL, *value = NULL; | |
340 | ||
341 | err = fscanf(f, "%m[^:]: %ms\n", &key, &value); | |
342 | if (err == EOF) { | |
343 | if (ferror(f)) | |
344 | perror("fscanf"); | |
345 | break; | |
346 | } else if (err == 2 && | |
cc28aad1 SH |
347 | !strcmp("iff", key) && |
348 | !strcmp(name, value)) { | |
567e6960 | 349 | char *pname = pid_name(pid); |
cc28aad1 | 350 | |
689bef5d SH |
351 | print_string(PRINT_ANY, "name", |
352 | "%s", pname ? : "<NULL>"); | |
353 | ||
354 | print_uint(PRINT_ANY, "pid", | |
355 | "(%d)", pid); | |
567e6960 HFS |
356 | free(pname); |
357 | } | |
358 | ||
359 | free(key); | |
360 | free(value); | |
361 | } | |
362 | if (fclose(f)) | |
363 | perror("fclose"); | |
364 | ||
365 | next: | |
366 | ++fd_path; | |
367 | } | |
689bef5d | 368 | close_json_array(PRINT_JSON, NULL); |
567e6960 HFS |
369 | |
370 | globfree(&globbuf); | |
567e6960 HFS |
371 | } |
372 | ||
8960d45f SP |
373 | static int tuntap_filter_req(struct nlmsghdr *nlh, int reqlen) |
374 | { | |
375 | struct rtattr *linkinfo; | |
376 | int err; | |
567e6960 | 377 | |
8960d45f SP |
378 | linkinfo = addattr_nest(nlh, reqlen, IFLA_LINKINFO); |
379 | ||
380 | err = addattr_l(nlh, reqlen, IFLA_INFO_KIND, | |
381 | drv_name, sizeof(drv_name) - 1); | |
382 | if (err) | |
383 | return err; | |
384 | ||
385 | addattr_nest_end(nlh, linkinfo); | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
cd554f2c | 390 | static int print_tuntap(struct nlmsghdr *n, void *arg) |
580fbd88 | 391 | { |
8960d45f SP |
392 | struct ifinfomsg *ifi = NLMSG_DATA(n); |
393 | struct rtattr *tb[IFLA_MAX+1]; | |
394 | struct rtattr *linkinfo[IFLA_INFO_MAX+1]; | |
395 | const char *name, *kind; | |
580fbd88 DW |
396 | long flags, owner = -1, group = -1; |
397 | ||
8960d45f SP |
398 | if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK) |
399 | return 0; | |
400 | ||
401 | if (n->nlmsg_len < NLMSG_LENGTH(sizeof(*ifi))) | |
580fbd88 | 402 | return -1; |
8960d45f SP |
403 | |
404 | switch (ifi->ifi_type) { | |
405 | case ARPHRD_NONE: | |
406 | case ARPHRD_ETHER: | |
407 | break; | |
408 | default: | |
409 | return 0; | |
580fbd88 | 410 | } |
8960d45f SP |
411 | |
412 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), IFLA_PAYLOAD(n)); | |
413 | ||
414 | if (!tb[IFLA_IFNAME]) | |
415 | return 0; | |
416 | ||
417 | if (!tb[IFLA_LINKINFO]) | |
418 | return 0; | |
419 | ||
420 | parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); | |
421 | ||
422 | if (!linkinfo[IFLA_INFO_KIND]) | |
423 | return 0; | |
424 | ||
425 | kind = rta_getattr_str(linkinfo[IFLA_INFO_KIND]); | |
426 | if (strcmp(kind, drv_name)) | |
427 | return 0; | |
428 | ||
429 | name = rta_getattr_str(tb[IFLA_IFNAME]); | |
430 | ||
431 | if (read_prop(name, "tun_flags", &flags)) | |
432 | return 0; | |
433 | if (read_prop(name, "owner", &owner)) | |
434 | return 0; | |
435 | if (read_prop(name, "group", &group)) | |
436 | return 0; | |
437 | ||
689bef5d SH |
438 | open_json_object(NULL); |
439 | print_color_string(PRINT_ANY, COLOR_IFNAME, | |
440 | "ifname", "%s:", name); | |
8960d45f SP |
441 | print_flags(flags); |
442 | if (owner != -1) | |
4db2ff0d | 443 | print_u64(PRINT_ANY, "user", |
689bef5d | 444 | " user %ld", owner); |
8960d45f | 445 | if (group != -1) |
4db2ff0d | 446 | print_u64(PRINT_ANY, "group", |
689bef5d SH |
447 | " group %ld", group); |
448 | ||
8960d45f | 449 | if (show_details) { |
689bef5d SH |
450 | print_string(PRINT_FP, NULL, |
451 | "%s\tAttached to processes:", _SL_); | |
8960d45f | 452 | show_processes(name); |
580fbd88 | 453 | } |
689bef5d SH |
454 | close_json_object(); |
455 | print_string(PRINT_FP, NULL, "%s", "\n"); | |
8960d45f SP |
456 | |
457 | return 0; | |
458 | } | |
459 | ||
460 | static int do_show(int argc, char **argv) | |
461 | { | |
31ae2912 | 462 | if (rtnl_linkdump_req_filter_fn(&rth, AF_UNSPEC, |
8960d45f SP |
463 | tuntap_filter_req) < 0) { |
464 | perror("Cannot send dump request\n"); | |
465 | return -1; | |
466 | } | |
467 | ||
689bef5d SH |
468 | new_json_obj(json); |
469 | ||
8960d45f SP |
470 | if (rtnl_dump_filter(&rth, print_tuntap, NULL) < 0) { |
471 | fprintf(stderr, "Dump terminated\n"); | |
472 | return -1; | |
473 | } | |
474 | ||
689bef5d SH |
475 | delete_json_obj(); |
476 | fflush(stdout); | |
477 | ||
580fbd88 DW |
478 | return 0; |
479 | } | |
480 | ||
481 | int do_iptuntap(int argc, char **argv) | |
482 | { | |
483 | if (argc > 0) { | |
484 | if (matches(*argv, "add") == 0) | |
485 | return do_add(argc-1, argv+1); | |
6e30461e | 486 | if (matches(*argv, "delete") == 0) |
580fbd88 DW |
487 | return do_del(argc-1, argv+1); |
488 | if (matches(*argv, "show") == 0 || | |
56f5daac SH |
489 | matches(*argv, "lst") == 0 || |
490 | matches(*argv, "list") == 0) | |
491 | return do_show(argc-1, argv+1); | |
580fbd88 DW |
492 | if (matches(*argv, "help") == 0) |
493 | usage(); | |
494 | } else | |
495 | return do_show(0, NULL); | |
496 | ||
497 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip tuntap help\".\n", | |
498 | *argv); | |
499 | exit(-1); | |
500 | } | |
118eda77 SD |
501 | |
502 | static void print_owner(FILE *f, uid_t uid) | |
503 | { | |
504 | struct passwd *pw = getpwuid(uid); | |
505 | ||
506 | if (pw) | |
7ba0a77b | 507 | print_string(PRINT_ANY, "user", "user %s ", pw->pw_name); |
118eda77 | 508 | else |
7ba0a77b | 509 | print_uint(PRINT_ANY, "user", "user %u ", uid); |
118eda77 SD |
510 | } |
511 | ||
512 | static void print_group(FILE *f, gid_t gid) | |
513 | { | |
514 | struct group *group = getgrgid(gid); | |
515 | ||
516 | if (group) | |
7ba0a77b | 517 | print_string(PRINT_ANY, "group", "group %s ", group->gr_name); |
118eda77 | 518 | else |
7ba0a77b | 519 | print_uint(PRINT_ANY, "group", "group %u ", gid); |
118eda77 SD |
520 | } |
521 | ||
522 | static void print_mq(FILE *f, struct rtattr *tb[]) | |
523 | { | |
524 | if (!tb[IFLA_TUN_MULTI_QUEUE] || | |
7ba0a77b SD |
525 | !rta_getattr_u8(tb[IFLA_TUN_MULTI_QUEUE])) { |
526 | if (is_json_context()) | |
527 | print_bool(PRINT_JSON, "multi_queue", NULL, false); | |
118eda77 | 528 | return; |
7ba0a77b | 529 | } |
118eda77 | 530 | |
7ba0a77b | 531 | print_bool(PRINT_ANY, "multi_queue", "multi_queue ", true); |
118eda77 SD |
532 | |
533 | if (tb[IFLA_TUN_NUM_QUEUES]) { | |
7ba0a77b SD |
534 | print_uint(PRINT_ANY, "numqueues", "numqueues %u ", |
535 | rta_getattr_u32(tb[IFLA_TUN_NUM_QUEUES])); | |
118eda77 SD |
536 | } |
537 | ||
538 | if (tb[IFLA_TUN_NUM_DISABLED_QUEUES]) { | |
7ba0a77b SD |
539 | print_uint(PRINT_ANY, "numdisabled", "numdisabled %u ", |
540 | rta_getattr_u32(tb[IFLA_TUN_NUM_DISABLED_QUEUES])); | |
118eda77 SD |
541 | } |
542 | } | |
543 | ||
544 | static void print_onoff(FILE *f, const char *flag, __u8 val) | |
545 | { | |
7ba0a77b SD |
546 | if (is_json_context()) |
547 | print_bool(PRINT_JSON, flag, NULL, !!val); | |
548 | else | |
549 | fprintf(f, "%s %s ", flag, val ? "on" : "off"); | |
550 | } | |
551 | ||
552 | static void print_type(FILE *f, __u8 type) | |
553 | { | |
554 | SPRINT_BUF(buf); | |
555 | const char *str = buf; | |
556 | ||
557 | if (type == IFF_TUN) | |
558 | str = "tun"; | |
559 | else if (type == IFF_TAP) | |
560 | str = "tap"; | |
561 | else | |
562 | snprintf(buf, sizeof(buf), "UNKNOWN:%hhu", type); | |
563 | ||
564 | print_string(PRINT_ANY, "type", "type %s ", str); | |
118eda77 SD |
565 | } |
566 | ||
567 | static void tun_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
568 | { | |
569 | if (!tb) | |
570 | return; | |
571 | ||
7ba0a77b SD |
572 | if (tb[IFLA_TUN_TYPE]) |
573 | print_type(f, rta_getattr_u8(tb[IFLA_TUN_TYPE])); | |
118eda77 SD |
574 | |
575 | if (tb[IFLA_TUN_PI]) | |
576 | print_onoff(f, "pi", rta_getattr_u8(tb[IFLA_TUN_PI])); | |
577 | ||
578 | if (tb[IFLA_TUN_VNET_HDR]) { | |
579 | print_onoff(f, "vnet_hdr", | |
580 | rta_getattr_u8(tb[IFLA_TUN_VNET_HDR])); | |
581 | } | |
582 | ||
583 | print_mq(f, tb); | |
584 | ||
585 | if (tb[IFLA_TUN_PERSIST]) | |
586 | print_onoff(f, "persist", rta_getattr_u8(tb[IFLA_TUN_PERSIST])); | |
587 | ||
588 | if (tb[IFLA_TUN_OWNER]) | |
589 | print_owner(f, rta_getattr_u32(tb[IFLA_TUN_OWNER])); | |
590 | ||
591 | if (tb[IFLA_TUN_GROUP]) | |
592 | print_group(f, rta_getattr_u32(tb[IFLA_TUN_GROUP])); | |
593 | } | |
594 | ||
595 | struct link_util tun_link_util = { | |
596 | .id = "tun", | |
597 | .maxattr = IFLA_TUN_MAX, | |
598 | .print_opt = tun_print_opt, | |
599 | }; |