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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
42f4e3c4 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
42f4e3c4 LP |
22 | #include <assert.h> |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
26 | #include <stdlib.h> | |
27 | #include <arpa/inet.h> | |
28 | #include <stdio.h> | |
542563ba | 29 | #include <net/if.h> |
b5a0699f LP |
30 | #include <sys/types.h> |
31 | #include <sys/stat.h> | |
0e098b15 LP |
32 | #include <stddef.h> |
33 | #include <sys/ioctl.h> | |
42f4e3c4 LP |
34 | |
35 | #include "macro.h" | |
36 | #include "util.h" | |
49e942b2 | 37 | #include "mkdir.h" |
9eb977db | 38 | #include "path-util.h" |
42f4e3c4 | 39 | #include "socket-util.h" |
16c42ce1 | 40 | #include "missing.h" |
a5c32cff | 41 | #include "fileio.h" |
42f4e3c4 | 42 | |
542563ba | 43 | int socket_address_parse(SocketAddress *a, const char *s) { |
42f4e3c4 LP |
44 | char *e, *n; |
45 | unsigned u; | |
4d49b48c | 46 | int r; |
42f4e3c4 LP |
47 | |
48 | assert(a); | |
49 | assert(s); | |
50 | ||
9152c765 | 51 | zero(*a); |
542563ba | 52 | a->type = SOCK_STREAM; |
42f4e3c4 LP |
53 | |
54 | if (*s == '[') { | |
55 | /* IPv6 in [x:.....:z]:p notation */ | |
56 | ||
5bfcc1c6 FF |
57 | if (!socket_ipv6_is_supported()) { |
58 | log_warning("Binding to IPv6 address not available since kernel does not support IPv6."); | |
59 | return -EAFNOSUPPORT; | |
60 | } | |
61 | ||
4d49b48c LP |
62 | e = strchr(s+1, ']'); |
63 | if (!e) | |
42f4e3c4 LP |
64 | return -EINVAL; |
65 | ||
4d49b48c | 66 | n = strndupa(s+1, e-s-1); |
42f4e3c4 LP |
67 | |
68 | errno = 0; | |
4d49b48c | 69 | if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0) |
8333c77e | 70 | return errno > 0 ? -errno : -EINVAL; |
42f4e3c4 LP |
71 | |
72 | e++; | |
73 | if (*e != ':') | |
74 | return -EINVAL; | |
75 | ||
76 | e++; | |
4d49b48c LP |
77 | r = safe_atou(e, &u); |
78 | if (r < 0) | |
42f4e3c4 LP |
79 | return r; |
80 | ||
81 | if (u <= 0 || u > 0xFFFF) | |
82 | return -EINVAL; | |
83 | ||
84 | a->sockaddr.in6.sin6_family = AF_INET6; | |
85 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
86 | a->size = sizeof(struct sockaddr_in6); | |
42f4e3c4 LP |
87 | |
88 | } else if (*s == '/') { | |
89 | /* AF_UNIX socket */ | |
90 | ||
91 | size_t l; | |
92 | ||
93 | l = strlen(s); | |
94 | if (l >= sizeof(a->sockaddr.un.sun_path)) | |
95 | return -EINVAL; | |
96 | ||
97 | a->sockaddr.un.sun_family = AF_UNIX; | |
98 | memcpy(a->sockaddr.un.sun_path, s, l); | |
0e098b15 | 99 | a->size = offsetof(struct sockaddr_un, sun_path) + l + 1; |
42f4e3c4 | 100 | |
1c24e7bd | 101 | } else if (*s == '@') { |
42f4e3c4 LP |
102 | /* Abstract AF_UNIX socket */ |
103 | size_t l; | |
104 | ||
105 | l = strlen(s+1); | |
106 | if (l >= sizeof(a->sockaddr.un.sun_path) - 1) | |
107 | return -EINVAL; | |
108 | ||
109 | a->sockaddr.un.sun_family = AF_UNIX; | |
110 | memcpy(a->sockaddr.un.sun_path+1, s+1, l); | |
0e098b15 | 111 | a->size = offsetof(struct sockaddr_un, sun_path) + 1 + l; |
42f4e3c4 LP |
112 | |
113 | } else { | |
4d49b48c LP |
114 | e = strchr(s, ':'); |
115 | if (e) { | |
116 | r = safe_atou(e+1, &u); | |
117 | if (r < 0) | |
542563ba LP |
118 | return r; |
119 | ||
120 | if (u <= 0 || u > 0xFFFF) | |
121 | return -EINVAL; | |
42f4e3c4 | 122 | |
4d49b48c | 123 | n = strndupa(s, e-s); |
42f4e3c4 | 124 | |
542563ba | 125 | /* IPv4 in w.x.y.z:p notation? */ |
4d49b48c LP |
126 | r = inet_pton(AF_INET, n, &a->sockaddr.in.sin_addr); |
127 | if (r < 0) | |
542563ba | 128 | return -errno; |
42f4e3c4 | 129 | |
542563ba LP |
130 | if (r > 0) { |
131 | /* Gotcha, it's a traditional IPv4 address */ | |
4d49b48c LP |
132 | a->sockaddr.in.sin_family = AF_INET; |
133 | a->sockaddr.in.sin_port = htons((uint16_t) u); | |
542563ba LP |
134 | a->size = sizeof(struct sockaddr_in); |
135 | } else { | |
136 | unsigned idx; | |
42f4e3c4 | 137 | |
4d49b48c | 138 | if (strlen(n) > IF_NAMESIZE-1) |
acbb0225 | 139 | return -EINVAL; |
acbb0225 | 140 | |
542563ba LP |
141 | /* Uh, our last resort, an interface name */ |
142 | idx = if_nametoindex(n); | |
83c60c9f | 143 | if (idx == 0) |
542563ba | 144 | return -EINVAL; |
42f4e3c4 | 145 | |
5bfcc1c6 FF |
146 | if (!socket_ipv6_is_supported()) { |
147 | log_warning("Binding to interface is not available since kernel does not support IPv6."); | |
148 | return -EAFNOSUPPORT; | |
149 | } | |
150 | ||
542563ba LP |
151 | a->sockaddr.in6.sin6_family = AF_INET6; |
152 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
153 | a->sockaddr.in6.sin6_scope_id = idx; | |
83c60c9f | 154 | a->sockaddr.in6.sin6_addr = in6addr_any; |
542563ba LP |
155 | a->size = sizeof(struct sockaddr_in6); |
156 | } | |
42f4e3c4 LP |
157 | } else { |
158 | ||
159 | /* Just a port */ | |
5198dabc LP |
160 | r = safe_atou(s, &u); |
161 | if (r < 0) | |
42f4e3c4 LP |
162 | return r; |
163 | ||
164 | if (u <= 0 || u > 0xFFFF) | |
165 | return -EINVAL; | |
166 | ||
5bfcc1c6 FF |
167 | if (socket_ipv6_is_supported()) { |
168 | a->sockaddr.in6.sin6_family = AF_INET6; | |
169 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
170 | a->sockaddr.in6.sin6_addr = in6addr_any; | |
171 | a->size = sizeof(struct sockaddr_in6); | |
172 | } else { | |
4d49b48c LP |
173 | a->sockaddr.in.sin_family = AF_INET; |
174 | a->sockaddr.in.sin_port = htons((uint16_t) u); | |
175 | a->sockaddr.in.sin_addr.s_addr = INADDR_ANY; | |
5bfcc1c6 FF |
176 | a->size = sizeof(struct sockaddr_in); |
177 | } | |
42f4e3c4 LP |
178 | } |
179 | } | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
7a22745a LP |
184 | int socket_address_parse_netlink(SocketAddress *a, const char *s) { |
185 | int family; | |
186 | unsigned group = 0; | |
f8b69d1d | 187 | _cleanup_free_ char *sfamily = NULL; |
7a22745a LP |
188 | assert(a); |
189 | assert(s); | |
190 | ||
191 | zero(*a); | |
192 | a->type = SOCK_RAW; | |
193 | ||
194 | errno = 0; | |
195 | if (sscanf(s, "%ms %u", &sfamily, &group) < 1) | |
bcb161b0 | 196 | return errno > 0 ? -errno : -EINVAL; |
7a22745a | 197 | |
f8b69d1d MS |
198 | family = netlink_family_from_string(sfamily); |
199 | if (family < 0) | |
200 | return -EINVAL; | |
7a22745a LP |
201 | |
202 | a->sockaddr.nl.nl_family = AF_NETLINK; | |
203 | a->sockaddr.nl.nl_groups = group; | |
204 | ||
205 | a->type = SOCK_RAW; | |
206 | a->size = sizeof(struct sockaddr_nl); | |
207 | a->protocol = family; | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
542563ba | 212 | int socket_address_verify(const SocketAddress *a) { |
42f4e3c4 LP |
213 | assert(a); |
214 | ||
542563ba | 215 | switch (socket_address_family(a)) { |
42f4e3c4 | 216 | |
7a22745a LP |
217 | case AF_INET: |
218 | if (a->size != sizeof(struct sockaddr_in)) | |
219 | return -EINVAL; | |
42f4e3c4 | 220 | |
4d49b48c | 221 | if (a->sockaddr.in.sin_port == 0) |
7a22745a | 222 | return -EINVAL; |
42f4e3c4 | 223 | |
7a22745a LP |
224 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM) |
225 | return -EINVAL; | |
42f4e3c4 | 226 | |
7a22745a LP |
227 | return 0; |
228 | ||
229 | case AF_INET6: | |
230 | if (a->size != sizeof(struct sockaddr_in6)) | |
231 | return -EINVAL; | |
42f4e3c4 | 232 | |
7a22745a LP |
233 | if (a->sockaddr.in6.sin6_port == 0) |
234 | return -EINVAL; | |
42f4e3c4 | 235 | |
7a22745a LP |
236 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM) |
237 | return -EINVAL; | |
42f4e3c4 | 238 | |
7a22745a | 239 | return 0; |
42f4e3c4 | 240 | |
7a22745a LP |
241 | case AF_UNIX: |
242 | if (a->size < offsetof(struct sockaddr_un, sun_path)) | |
243 | return -EINVAL; | |
42f4e3c4 | 244 | |
7a22745a | 245 | if (a->size > offsetof(struct sockaddr_un, sun_path)) { |
42f4e3c4 | 246 | |
7a22745a LP |
247 | if (a->sockaddr.un.sun_path[0] != 0) { |
248 | char *e; | |
249 | ||
250 | /* path */ | |
4d49b48c LP |
251 | e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path)); |
252 | if (!e) | |
7a22745a LP |
253 | return -EINVAL; |
254 | ||
255 | if (a->size != offsetof(struct sockaddr_un, sun_path) + (e - a->sockaddr.un.sun_path) + 1) | |
256 | return -EINVAL; | |
42f4e3c4 | 257 | } |
7a22745a | 258 | } |
42f4e3c4 | 259 | |
5a2b80ce | 260 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM && a->type != SOCK_SEQPACKET) |
7a22745a | 261 | return -EINVAL; |
42f4e3c4 | 262 | |
7a22745a LP |
263 | return 0; |
264 | ||
265 | case AF_NETLINK: | |
266 | ||
267 | if (a->size != sizeof(struct sockaddr_nl)) | |
268 | return -EINVAL; | |
269 | ||
270 | if (a->type != SOCK_RAW && a->type != SOCK_DGRAM) | |
271 | return -EINVAL; | |
272 | ||
273 | return 0; | |
274 | ||
275 | default: | |
276 | return -EAFNOSUPPORT; | |
42f4e3c4 LP |
277 | } |
278 | } | |
279 | ||
4d49b48c | 280 | int socket_address_print(const SocketAddress *a, char **ret) { |
42f4e3c4 | 281 | int r; |
4d49b48c | 282 | |
42f4e3c4 | 283 | assert(a); |
4d49b48c | 284 | assert(ret); |
42f4e3c4 | 285 | |
4d49b48c LP |
286 | r = socket_address_verify(a); |
287 | if (r < 0) | |
42f4e3c4 LP |
288 | return r; |
289 | ||
4d49b48c | 290 | if (socket_address_family(a) == AF_NETLINK) { |
7fd1b19b | 291 | _cleanup_free_ char *sfamily = NULL; |
7a22745a | 292 | |
f8b69d1d | 293 | r = netlink_family_to_string_alloc(a->protocol, &sfamily); |
7a22745a | 294 | if (r < 0) |
f8b69d1d | 295 | return r; |
4d49b48c LP |
296 | |
297 | r = asprintf(ret, "%s %u", sfamily, a->sockaddr.nl.nl_groups); | |
8520cfa5 MS |
298 | if (r < 0) |
299 | return -ENOMEM; | |
7a22745a LP |
300 | |
301 | return 0; | |
302 | } | |
303 | ||
4d49b48c | 304 | return sockaddr_pretty(&a->sockaddr.sa, a->size, false, ret); |
42f4e3c4 LP |
305 | } |
306 | ||
4f2d528d LP |
307 | bool socket_address_can_accept(const SocketAddress *a) { |
308 | assert(a); | |
309 | ||
310 | return | |
311 | a->type == SOCK_STREAM || | |
312 | a->type == SOCK_SEQPACKET; | |
313 | } | |
a16e1123 LP |
314 | |
315 | bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) { | |
316 | assert(a); | |
317 | assert(b); | |
318 | ||
319 | /* Invalid addresses are unequal to all */ | |
320 | if (socket_address_verify(a) < 0 || | |
321 | socket_address_verify(b) < 0) | |
322 | return false; | |
323 | ||
324 | if (a->type != b->type) | |
325 | return false; | |
326 | ||
327 | if (a->size != b->size) | |
328 | return false; | |
329 | ||
330 | if (socket_address_family(a) != socket_address_family(b)) | |
331 | return false; | |
332 | ||
333 | switch (socket_address_family(a)) { | |
334 | ||
335 | case AF_INET: | |
4d49b48c | 336 | if (a->sockaddr.in.sin_addr.s_addr != b->sockaddr.in.sin_addr.s_addr) |
a16e1123 LP |
337 | return false; |
338 | ||
4d49b48c | 339 | if (a->sockaddr.in.sin_port != b->sockaddr.in.sin_port) |
a16e1123 LP |
340 | return false; |
341 | ||
342 | break; | |
343 | ||
344 | case AF_INET6: | |
345 | if (memcmp(&a->sockaddr.in6.sin6_addr, &b->sockaddr.in6.sin6_addr, sizeof(a->sockaddr.in6.sin6_addr)) != 0) | |
346 | return false; | |
347 | ||
348 | if (a->sockaddr.in6.sin6_port != b->sockaddr.in6.sin6_port) | |
349 | return false; | |
350 | ||
351 | break; | |
352 | ||
353 | case AF_UNIX: | |
354 | ||
355 | if ((a->sockaddr.un.sun_path[0] == 0) != (b->sockaddr.un.sun_path[0] == 0)) | |
356 | return false; | |
357 | ||
358 | if (a->sockaddr.un.sun_path[0]) { | |
641906e9 | 359 | if (!strneq(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, sizeof(a->sockaddr.un.sun_path))) |
a16e1123 LP |
360 | return false; |
361 | } else { | |
b12c1e7c | 362 | if (memcmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, a->size) != 0) |
a16e1123 LP |
363 | return false; |
364 | } | |
365 | ||
366 | break; | |
367 | ||
7a22745a LP |
368 | case AF_NETLINK: |
369 | ||
370 | if (a->protocol != b->protocol) | |
371 | return false; | |
372 | ||
373 | if (a->sockaddr.nl.nl_groups != b->sockaddr.nl.nl_groups) | |
374 | return false; | |
375 | ||
376 | break; | |
377 | ||
a16e1123 LP |
378 | default: |
379 | /* Cannot compare, so we assume the addresses are different */ | |
380 | return false; | |
381 | } | |
382 | ||
383 | return true; | |
384 | } | |
385 | ||
27ca8d7a | 386 | bool socket_address_is(const SocketAddress *a, const char *s, int type) { |
a16e1123 LP |
387 | struct SocketAddress b; |
388 | ||
389 | assert(a); | |
390 | assert(s); | |
391 | ||
392 | if (socket_address_parse(&b, s) < 0) | |
393 | return false; | |
394 | ||
27ca8d7a LP |
395 | b.type = type; |
396 | ||
a16e1123 | 397 | return socket_address_equal(a, &b); |
6e2ef85b LP |
398 | } |
399 | ||
7a22745a LP |
400 | bool socket_address_is_netlink(const SocketAddress *a, const char *s) { |
401 | struct SocketAddress b; | |
402 | ||
403 | assert(a); | |
404 | assert(s); | |
405 | ||
406 | if (socket_address_parse_netlink(&b, s) < 0) | |
407 | return false; | |
408 | ||
409 | return socket_address_equal(a, &b); | |
410 | } | |
411 | ||
a57f7e2c | 412 | const char* socket_address_get_path(const SocketAddress *a) { |
6e2ef85b LP |
413 | assert(a); |
414 | ||
415 | if (socket_address_family(a) != AF_UNIX) | |
a57f7e2c | 416 | return NULL; |
6e2ef85b LP |
417 | |
418 | if (a->sockaddr.un.sun_path[0] == 0) | |
a57f7e2c | 419 | return NULL; |
a16e1123 | 420 | |
a57f7e2c | 421 | return a->sockaddr.un.sun_path; |
a16e1123 | 422 | } |
c0120d99 | 423 | |
5bfcc1c6 | 424 | bool socket_ipv6_is_supported(void) { |
f89f1e8f AB |
425 | char *l = 0; |
426 | bool enabled; | |
427 | ||
428 | if (access("/sys/module/ipv6", F_OK) != 0) | |
429 | return 0; | |
430 | ||
431 | /* If we can't check "disable" parameter, assume enabled */ | |
432 | if (read_one_line_file("/sys/module/ipv6/parameters/disable", &l) < 0) | |
433 | return 1; | |
434 | ||
435 | /* If module was loaded with disable=1 no IPv6 available */ | |
436 | enabled = l[0] == '0'; | |
437 | free(l); | |
438 | ||
439 | return enabled; | |
5bfcc1c6 FF |
440 | } |
441 | ||
01e10de3 LP |
442 | bool socket_address_matches_fd(const SocketAddress *a, int fd) { |
443 | union sockaddr_union sa; | |
444 | socklen_t salen = sizeof(sa), solen; | |
445 | int protocol, type; | |
446 | ||
447 | assert(a); | |
448 | assert(fd >= 0); | |
449 | ||
450 | if (getsockname(fd, &sa.sa, &salen) < 0) | |
451 | return false; | |
452 | ||
453 | if (sa.sa.sa_family != a->sockaddr.sa.sa_family) | |
454 | return false; | |
455 | ||
456 | solen = sizeof(type); | |
457 | if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &solen) < 0) | |
458 | return false; | |
459 | ||
460 | if (type != a->type) | |
461 | return false; | |
462 | ||
463 | if (a->protocol != 0) { | |
464 | solen = sizeof(protocol); | |
465 | if (getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &protocol, &solen) < 0) | |
466 | return false; | |
467 | ||
468 | if (protocol != a->protocol) | |
469 | return false; | |
470 | } | |
471 | ||
472 | switch (sa.sa.sa_family) { | |
473 | ||
474 | case AF_INET: | |
4d49b48c LP |
475 | return sa.in.sin_port == a->sockaddr.in.sin_port && |
476 | sa.in.sin_addr.s_addr == a->sockaddr.in.sin_addr.s_addr; | |
01e10de3 LP |
477 | |
478 | case AF_INET6: | |
479 | return sa.in6.sin6_port == a->sockaddr.in6.sin6_port && | |
480 | memcmp(&sa.in6.sin6_addr, &a->sockaddr.in6.sin6_addr, sizeof(struct in6_addr)) == 0; | |
481 | ||
482 | case AF_UNIX: | |
483 | return salen == a->size && | |
484 | memcmp(sa.un.sun_path, a->sockaddr.un.sun_path, salen - offsetof(struct sockaddr_un, sun_path)) == 0; | |
485 | ||
486 | } | |
487 | ||
488 | return false; | |
489 | } | |
490 | ||
4d49b48c LP |
491 | int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, char **ret) { |
492 | union sockaddr_union *sa = (union sockaddr_union*) _sa; | |
8569a776 LP |
493 | char *p; |
494 | ||
4d49b48c LP |
495 | assert(sa); |
496 | assert(salen >= sizeof(sa->sa.sa_family)); | |
8569a776 | 497 | |
4d49b48c | 498 | switch (sa->sa.sa_family) { |
8569a776 LP |
499 | |
500 | case AF_INET: { | |
501 | uint32_t a; | |
502 | ||
4d49b48c | 503 | a = ntohl(sa->in.sin_addr.s_addr); |
8569a776 LP |
504 | |
505 | if (asprintf(&p, | |
506 | "%u.%u.%u.%u:%u", | |
507 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, | |
4d49b48c | 508 | ntohs(sa->in.sin_port)) < 0) |
8569a776 LP |
509 | return -ENOMEM; |
510 | ||
511 | break; | |
512 | } | |
513 | ||
514 | case AF_INET6: { | |
515 | static const unsigned char ipv4_prefix[] = { | |
516 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF | |
517 | }; | |
518 | ||
4d49b48c LP |
519 | if (translate_ipv6 && memcmp(&sa->in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { |
520 | const uint8_t *a = sa->in6.sin6_addr.s6_addr+12; | |
8569a776 LP |
521 | |
522 | if (asprintf(&p, | |
523 | "%u.%u.%u.%u:%u", | |
524 | a[0], a[1], a[2], a[3], | |
4d49b48c | 525 | ntohs(sa->in6.sin6_port)) < 0) |
8569a776 LP |
526 | return -ENOMEM; |
527 | } else { | |
528 | char a[INET6_ADDRSTRLEN]; | |
529 | ||
530 | if (asprintf(&p, | |
4d49b48c LP |
531 | "[%s]:%u", |
532 | inet_ntop(AF_INET6, &sa->in6.sin6_addr, a, sizeof(a)), | |
533 | ntohs(sa->in6.sin6_port)) < 0) | |
8569a776 LP |
534 | return -ENOMEM; |
535 | } | |
536 | ||
537 | break; | |
538 | } | |
539 | ||
4d49b48c LP |
540 | case AF_UNIX: |
541 | if (salen <= offsetof(struct sockaddr_un, sun_path)) { | |
542 | p = strdup("<unnamed>"); | |
543 | if (!p) | |
544 | return -ENOMEM; | |
8569a776 | 545 | |
4d49b48c LP |
546 | } else if (sa->un.sun_path[0] == 0) { |
547 | /* abstract */ | |
8569a776 | 548 | |
4d49b48c LP |
549 | /* FIXME: We assume we can print the |
550 | * socket path here and that it hasn't | |
551 | * more than one NUL byte. That is | |
552 | * actually an invalid assumption */ | |
553 | ||
554 | p = new(char, sizeof(sa->un.sun_path)+1); | |
555 | if (!p) | |
556 | return -ENOMEM; | |
557 | ||
558 | p[0] = '@'; | |
559 | memcpy(p+1, sa->un.sun_path+1, sizeof(sa->un.sun_path)-1); | |
560 | p[sizeof(sa->un.sun_path)] = 0; | |
561 | ||
562 | } else { | |
563 | p = strndup(sa->un.sun_path, sizeof(sa->un.sun_path)); | |
564 | if (!ret) | |
565 | return -ENOMEM; | |
566 | } | |
8569a776 LP |
567 | |
568 | break; | |
8569a776 LP |
569 | |
570 | default: | |
571 | return -ENOTSUP; | |
572 | } | |
573 | ||
4d49b48c | 574 | |
8569a776 LP |
575 | *ret = p; |
576 | return 0; | |
577 | } | |
578 | ||
4d49b48c LP |
579 | int getpeername_pretty(int fd, char **ret) { |
580 | union sockaddr_union sa; | |
581 | socklen_t salen; | |
eff05270 | 582 | int r; |
4d49b48c LP |
583 | |
584 | assert(fd >= 0); | |
585 | assert(ret); | |
586 | ||
587 | salen = sizeof(sa); | |
588 | if (getpeername(fd, &sa.sa, &salen) < 0) | |
589 | return -errno; | |
590 | ||
591 | if (sa.sa.sa_family == AF_UNIX) { | |
592 | struct ucred ucred; | |
593 | ||
594 | /* UNIX connection sockets are anonymous, so let's use | |
595 | * PID/UID as pretty credentials instead */ | |
596 | ||
eff05270 LP |
597 | r = getpeercred(fd, &ucred); |
598 | if (r < 0) | |
599 | return r; | |
4d49b48c LP |
600 | |
601 | if (asprintf(ret, "PID %lu/UID %lu", (unsigned long) ucred.pid, (unsigned long) ucred.pid) < 0) | |
602 | return -ENOMEM; | |
603 | ||
604 | return 0; | |
605 | } | |
606 | ||
607 | /* For remote sockets we translate IPv6 addresses back to IPv4 | |
608 | * if applicable, since that's nicer. */ | |
609 | ||
610 | return sockaddr_pretty(&sa.sa, salen, true, ret); | |
611 | } | |
612 | ||
613 | int getsockname_pretty(int fd, char **ret) { | |
614 | union sockaddr_union sa; | |
615 | socklen_t salen; | |
616 | ||
617 | assert(fd >= 0); | |
618 | assert(ret); | |
619 | ||
620 | salen = sizeof(sa); | |
621 | if (getsockname(fd, &sa.sa, &salen) < 0) | |
622 | return -errno; | |
623 | ||
624 | /* For local sockets we do not translate IPv6 addresses back | |
625 | * to IPv6 if applicable, since this is usually used for | |
626 | * listening sockets where the difference between IPv4 and | |
627 | * IPv6 matters. */ | |
628 | ||
629 | return sockaddr_pretty(&sa.sa, salen, false, ret); | |
630 | } | |
631 | ||
7a22745a LP |
632 | static const char* const netlink_family_table[] = { |
633 | [NETLINK_ROUTE] = "route", | |
634 | [NETLINK_FIREWALL] = "firewall", | |
635 | [NETLINK_INET_DIAG] = "inet-diag", | |
636 | [NETLINK_NFLOG] = "nflog", | |
637 | [NETLINK_XFRM] = "xfrm", | |
638 | [NETLINK_SELINUX] = "selinux", | |
639 | [NETLINK_ISCSI] = "iscsi", | |
640 | [NETLINK_AUDIT] = "audit", | |
641 | [NETLINK_FIB_LOOKUP] = "fib-lookup", | |
642 | [NETLINK_CONNECTOR] = "connector", | |
643 | [NETLINK_NETFILTER] = "netfilter", | |
644 | [NETLINK_IP6_FW] = "ip6-fw", | |
645 | [NETLINK_DNRTMSG] = "dnrtmsg", | |
646 | [NETLINK_KOBJECT_UEVENT] = "kobject-uevent", | |
647 | [NETLINK_GENERIC] = "generic", | |
648 | [NETLINK_SCSITRANSPORT] = "scsitransport", | |
649 | [NETLINK_ECRYPTFS] = "ecryptfs" | |
650 | }; | |
651 | ||
f8b69d1d | 652 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(netlink_family, int, INT_MAX); |
7a22745a | 653 | |
c0120d99 LP |
654 | static const char* const socket_address_bind_ipv6_only_table[_SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX] = { |
655 | [SOCKET_ADDRESS_DEFAULT] = "default", | |
656 | [SOCKET_ADDRESS_BOTH] = "both", | |
657 | [SOCKET_ADDRESS_IPV6_ONLY] = "ipv6-only" | |
658 | }; | |
659 | ||
660 | DEFINE_STRING_TABLE_LOOKUP(socket_address_bind_ipv6_only, SocketAddressBindIPv6Only); |