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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> | |
b31f535c | 34 | #include <netdb.h> |
42f4e3c4 LP |
35 | |
36 | #include "macro.h" | |
37 | #include "util.h" | |
49e942b2 | 38 | #include "mkdir.h" |
9eb977db | 39 | #include "path-util.h" |
42f4e3c4 | 40 | #include "socket-util.h" |
16c42ce1 | 41 | #include "missing.h" |
a5c32cff | 42 | #include "fileio.h" |
42f4e3c4 | 43 | |
542563ba | 44 | int socket_address_parse(SocketAddress *a, const char *s) { |
42f4e3c4 LP |
45 | char *e, *n; |
46 | unsigned u; | |
4d49b48c | 47 | int r; |
42f4e3c4 LP |
48 | |
49 | assert(a); | |
50 | assert(s); | |
51 | ||
9152c765 | 52 | zero(*a); |
542563ba | 53 | a->type = SOCK_STREAM; |
42f4e3c4 LP |
54 | |
55 | if (*s == '[') { | |
56 | /* IPv6 in [x:.....:z]:p notation */ | |
57 | ||
5bfcc1c6 FF |
58 | if (!socket_ipv6_is_supported()) { |
59 | log_warning("Binding to IPv6 address not available since kernel does not support IPv6."); | |
60 | return -EAFNOSUPPORT; | |
61 | } | |
62 | ||
4d49b48c LP |
63 | e = strchr(s+1, ']'); |
64 | if (!e) | |
42f4e3c4 LP |
65 | return -EINVAL; |
66 | ||
4d49b48c | 67 | n = strndupa(s+1, e-s-1); |
42f4e3c4 LP |
68 | |
69 | errno = 0; | |
4d49b48c | 70 | if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0) |
8333c77e | 71 | return errno > 0 ? -errno : -EINVAL; |
42f4e3c4 LP |
72 | |
73 | e++; | |
74 | if (*e != ':') | |
75 | return -EINVAL; | |
76 | ||
77 | e++; | |
4d49b48c LP |
78 | r = safe_atou(e, &u); |
79 | if (r < 0) | |
42f4e3c4 LP |
80 | return r; |
81 | ||
82 | if (u <= 0 || u > 0xFFFF) | |
83 | return -EINVAL; | |
84 | ||
85 | a->sockaddr.in6.sin6_family = AF_INET6; | |
86 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
87 | a->size = sizeof(struct sockaddr_in6); | |
42f4e3c4 LP |
88 | |
89 | } else if (*s == '/') { | |
90 | /* AF_UNIX socket */ | |
91 | ||
92 | size_t l; | |
93 | ||
94 | l = strlen(s); | |
95 | if (l >= sizeof(a->sockaddr.un.sun_path)) | |
96 | return -EINVAL; | |
97 | ||
98 | a->sockaddr.un.sun_family = AF_UNIX; | |
99 | memcpy(a->sockaddr.un.sun_path, s, l); | |
0e098b15 | 100 | a->size = offsetof(struct sockaddr_un, sun_path) + l + 1; |
42f4e3c4 | 101 | |
1c24e7bd | 102 | } else if (*s == '@') { |
42f4e3c4 LP |
103 | /* Abstract AF_UNIX socket */ |
104 | size_t l; | |
105 | ||
106 | l = strlen(s+1); | |
107 | if (l >= sizeof(a->sockaddr.un.sun_path) - 1) | |
108 | return -EINVAL; | |
109 | ||
110 | a->sockaddr.un.sun_family = AF_UNIX; | |
111 | memcpy(a->sockaddr.un.sun_path+1, s+1, l); | |
0e098b15 | 112 | a->size = offsetof(struct sockaddr_un, sun_path) + 1 + l; |
42f4e3c4 LP |
113 | |
114 | } else { | |
4d49b48c LP |
115 | e = strchr(s, ':'); |
116 | if (e) { | |
117 | r = safe_atou(e+1, &u); | |
118 | if (r < 0) | |
542563ba LP |
119 | return r; |
120 | ||
121 | if (u <= 0 || u > 0xFFFF) | |
122 | return -EINVAL; | |
42f4e3c4 | 123 | |
4d49b48c | 124 | n = strndupa(s, e-s); |
42f4e3c4 | 125 | |
542563ba | 126 | /* IPv4 in w.x.y.z:p notation? */ |
4d49b48c LP |
127 | r = inet_pton(AF_INET, n, &a->sockaddr.in.sin_addr); |
128 | if (r < 0) | |
542563ba | 129 | return -errno; |
42f4e3c4 | 130 | |
542563ba LP |
131 | if (r > 0) { |
132 | /* Gotcha, it's a traditional IPv4 address */ | |
4d49b48c LP |
133 | a->sockaddr.in.sin_family = AF_INET; |
134 | a->sockaddr.in.sin_port = htons((uint16_t) u); | |
542563ba LP |
135 | a->size = sizeof(struct sockaddr_in); |
136 | } else { | |
137 | unsigned idx; | |
42f4e3c4 | 138 | |
4d49b48c | 139 | if (strlen(n) > IF_NAMESIZE-1) |
acbb0225 | 140 | return -EINVAL; |
acbb0225 | 141 | |
542563ba LP |
142 | /* Uh, our last resort, an interface name */ |
143 | idx = if_nametoindex(n); | |
83c60c9f | 144 | if (idx == 0) |
542563ba | 145 | return -EINVAL; |
42f4e3c4 | 146 | |
5bfcc1c6 FF |
147 | if (!socket_ipv6_is_supported()) { |
148 | log_warning("Binding to interface is not available since kernel does not support IPv6."); | |
149 | return -EAFNOSUPPORT; | |
150 | } | |
151 | ||
542563ba LP |
152 | a->sockaddr.in6.sin6_family = AF_INET6; |
153 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
154 | a->sockaddr.in6.sin6_scope_id = idx; | |
83c60c9f | 155 | a->sockaddr.in6.sin6_addr = in6addr_any; |
542563ba LP |
156 | a->size = sizeof(struct sockaddr_in6); |
157 | } | |
42f4e3c4 LP |
158 | } else { |
159 | ||
160 | /* Just a port */ | |
5198dabc LP |
161 | r = safe_atou(s, &u); |
162 | if (r < 0) | |
42f4e3c4 LP |
163 | return r; |
164 | ||
165 | if (u <= 0 || u > 0xFFFF) | |
166 | return -EINVAL; | |
167 | ||
5bfcc1c6 FF |
168 | if (socket_ipv6_is_supported()) { |
169 | a->sockaddr.in6.sin6_family = AF_INET6; | |
170 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
171 | a->sockaddr.in6.sin6_addr = in6addr_any; | |
172 | a->size = sizeof(struct sockaddr_in6); | |
173 | } else { | |
4d49b48c LP |
174 | a->sockaddr.in.sin_family = AF_INET; |
175 | a->sockaddr.in.sin_port = htons((uint16_t) u); | |
176 | a->sockaddr.in.sin_addr.s_addr = INADDR_ANY; | |
5bfcc1c6 FF |
177 | a->size = sizeof(struct sockaddr_in); |
178 | } | |
42f4e3c4 LP |
179 | } |
180 | } | |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
7a22745a LP |
185 | int socket_address_parse_netlink(SocketAddress *a, const char *s) { |
186 | int family; | |
187 | unsigned group = 0; | |
f8b69d1d | 188 | _cleanup_free_ char *sfamily = NULL; |
7a22745a LP |
189 | assert(a); |
190 | assert(s); | |
191 | ||
192 | zero(*a); | |
193 | a->type = SOCK_RAW; | |
194 | ||
195 | errno = 0; | |
196 | if (sscanf(s, "%ms %u", &sfamily, &group) < 1) | |
bcb161b0 | 197 | return errno > 0 ? -errno : -EINVAL; |
7a22745a | 198 | |
f8b69d1d MS |
199 | family = netlink_family_from_string(sfamily); |
200 | if (family < 0) | |
201 | return -EINVAL; | |
7a22745a LP |
202 | |
203 | a->sockaddr.nl.nl_family = AF_NETLINK; | |
204 | a->sockaddr.nl.nl_groups = group; | |
205 | ||
206 | a->type = SOCK_RAW; | |
207 | a->size = sizeof(struct sockaddr_nl); | |
208 | a->protocol = family; | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
542563ba | 213 | int socket_address_verify(const SocketAddress *a) { |
42f4e3c4 LP |
214 | assert(a); |
215 | ||
542563ba | 216 | switch (socket_address_family(a)) { |
42f4e3c4 | 217 | |
7a22745a LP |
218 | case AF_INET: |
219 | if (a->size != sizeof(struct sockaddr_in)) | |
220 | return -EINVAL; | |
42f4e3c4 | 221 | |
4d49b48c | 222 | if (a->sockaddr.in.sin_port == 0) |
7a22745a | 223 | return -EINVAL; |
42f4e3c4 | 224 | |
7a22745a LP |
225 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM) |
226 | return -EINVAL; | |
42f4e3c4 | 227 | |
7a22745a LP |
228 | return 0; |
229 | ||
230 | case AF_INET6: | |
231 | if (a->size != sizeof(struct sockaddr_in6)) | |
232 | return -EINVAL; | |
42f4e3c4 | 233 | |
7a22745a LP |
234 | if (a->sockaddr.in6.sin6_port == 0) |
235 | return -EINVAL; | |
42f4e3c4 | 236 | |
7a22745a LP |
237 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM) |
238 | return -EINVAL; | |
42f4e3c4 | 239 | |
7a22745a | 240 | return 0; |
42f4e3c4 | 241 | |
7a22745a LP |
242 | case AF_UNIX: |
243 | if (a->size < offsetof(struct sockaddr_un, sun_path)) | |
244 | return -EINVAL; | |
42f4e3c4 | 245 | |
7a22745a | 246 | if (a->size > offsetof(struct sockaddr_un, sun_path)) { |
42f4e3c4 | 247 | |
7a22745a LP |
248 | if (a->sockaddr.un.sun_path[0] != 0) { |
249 | char *e; | |
250 | ||
251 | /* path */ | |
4d49b48c LP |
252 | e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path)); |
253 | if (!e) | |
7a22745a LP |
254 | return -EINVAL; |
255 | ||
256 | if (a->size != offsetof(struct sockaddr_un, sun_path) + (e - a->sockaddr.un.sun_path) + 1) | |
257 | return -EINVAL; | |
42f4e3c4 | 258 | } |
7a22745a | 259 | } |
42f4e3c4 | 260 | |
5a2b80ce | 261 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM && a->type != SOCK_SEQPACKET) |
7a22745a | 262 | return -EINVAL; |
42f4e3c4 | 263 | |
7a22745a LP |
264 | return 0; |
265 | ||
266 | case AF_NETLINK: | |
267 | ||
268 | if (a->size != sizeof(struct sockaddr_nl)) | |
269 | return -EINVAL; | |
270 | ||
271 | if (a->type != SOCK_RAW && a->type != SOCK_DGRAM) | |
272 | return -EINVAL; | |
273 | ||
274 | return 0; | |
275 | ||
276 | default: | |
277 | return -EAFNOSUPPORT; | |
42f4e3c4 LP |
278 | } |
279 | } | |
280 | ||
4d49b48c | 281 | int socket_address_print(const SocketAddress *a, char **ret) { |
42f4e3c4 | 282 | int r; |
4d49b48c | 283 | |
42f4e3c4 | 284 | assert(a); |
4d49b48c | 285 | assert(ret); |
42f4e3c4 | 286 | |
4d49b48c LP |
287 | r = socket_address_verify(a); |
288 | if (r < 0) | |
42f4e3c4 LP |
289 | return r; |
290 | ||
4d49b48c | 291 | if (socket_address_family(a) == AF_NETLINK) { |
7fd1b19b | 292 | _cleanup_free_ char *sfamily = NULL; |
7a22745a | 293 | |
f8b69d1d | 294 | r = netlink_family_to_string_alloc(a->protocol, &sfamily); |
7a22745a | 295 | if (r < 0) |
f8b69d1d | 296 | return r; |
4d49b48c LP |
297 | |
298 | r = asprintf(ret, "%s %u", sfamily, a->sockaddr.nl.nl_groups); | |
8520cfa5 MS |
299 | if (r < 0) |
300 | return -ENOMEM; | |
7a22745a LP |
301 | |
302 | return 0; | |
303 | } | |
304 | ||
4d49b48c | 305 | return sockaddr_pretty(&a->sockaddr.sa, a->size, false, ret); |
42f4e3c4 LP |
306 | } |
307 | ||
4f2d528d LP |
308 | bool socket_address_can_accept(const SocketAddress *a) { |
309 | assert(a); | |
310 | ||
311 | return | |
312 | a->type == SOCK_STREAM || | |
313 | a->type == SOCK_SEQPACKET; | |
314 | } | |
a16e1123 LP |
315 | |
316 | bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) { | |
317 | assert(a); | |
318 | assert(b); | |
319 | ||
320 | /* Invalid addresses are unequal to all */ | |
321 | if (socket_address_verify(a) < 0 || | |
322 | socket_address_verify(b) < 0) | |
323 | return false; | |
324 | ||
325 | if (a->type != b->type) | |
326 | return false; | |
327 | ||
328 | if (a->size != b->size) | |
329 | return false; | |
330 | ||
331 | if (socket_address_family(a) != socket_address_family(b)) | |
332 | return false; | |
333 | ||
334 | switch (socket_address_family(a)) { | |
335 | ||
336 | case AF_INET: | |
4d49b48c | 337 | if (a->sockaddr.in.sin_addr.s_addr != b->sockaddr.in.sin_addr.s_addr) |
a16e1123 LP |
338 | return false; |
339 | ||
4d49b48c | 340 | if (a->sockaddr.in.sin_port != b->sockaddr.in.sin_port) |
a16e1123 LP |
341 | return false; |
342 | ||
343 | break; | |
344 | ||
345 | case AF_INET6: | |
346 | if (memcmp(&a->sockaddr.in6.sin6_addr, &b->sockaddr.in6.sin6_addr, sizeof(a->sockaddr.in6.sin6_addr)) != 0) | |
347 | return false; | |
348 | ||
349 | if (a->sockaddr.in6.sin6_port != b->sockaddr.in6.sin6_port) | |
350 | return false; | |
351 | ||
352 | break; | |
353 | ||
354 | case AF_UNIX: | |
355 | ||
356 | if ((a->sockaddr.un.sun_path[0] == 0) != (b->sockaddr.un.sun_path[0] == 0)) | |
357 | return false; | |
358 | ||
359 | if (a->sockaddr.un.sun_path[0]) { | |
641906e9 | 360 | if (!strneq(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, sizeof(a->sockaddr.un.sun_path))) |
a16e1123 LP |
361 | return false; |
362 | } else { | |
b12c1e7c | 363 | if (memcmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, a->size) != 0) |
a16e1123 LP |
364 | return false; |
365 | } | |
366 | ||
367 | break; | |
368 | ||
7a22745a LP |
369 | case AF_NETLINK: |
370 | ||
371 | if (a->protocol != b->protocol) | |
372 | return false; | |
373 | ||
374 | if (a->sockaddr.nl.nl_groups != b->sockaddr.nl.nl_groups) | |
375 | return false; | |
376 | ||
377 | break; | |
378 | ||
a16e1123 LP |
379 | default: |
380 | /* Cannot compare, so we assume the addresses are different */ | |
381 | return false; | |
382 | } | |
383 | ||
384 | return true; | |
385 | } | |
386 | ||
27ca8d7a | 387 | bool socket_address_is(const SocketAddress *a, const char *s, int type) { |
a16e1123 LP |
388 | struct SocketAddress b; |
389 | ||
390 | assert(a); | |
391 | assert(s); | |
392 | ||
393 | if (socket_address_parse(&b, s) < 0) | |
394 | return false; | |
395 | ||
27ca8d7a LP |
396 | b.type = type; |
397 | ||
a16e1123 | 398 | return socket_address_equal(a, &b); |
6e2ef85b LP |
399 | } |
400 | ||
7a22745a LP |
401 | bool socket_address_is_netlink(const SocketAddress *a, const char *s) { |
402 | struct SocketAddress b; | |
403 | ||
404 | assert(a); | |
405 | assert(s); | |
406 | ||
407 | if (socket_address_parse_netlink(&b, s) < 0) | |
408 | return false; | |
409 | ||
410 | return socket_address_equal(a, &b); | |
411 | } | |
412 | ||
a57f7e2c | 413 | const char* socket_address_get_path(const SocketAddress *a) { |
6e2ef85b LP |
414 | assert(a); |
415 | ||
416 | if (socket_address_family(a) != AF_UNIX) | |
a57f7e2c | 417 | return NULL; |
6e2ef85b LP |
418 | |
419 | if (a->sockaddr.un.sun_path[0] == 0) | |
a57f7e2c | 420 | return NULL; |
a16e1123 | 421 | |
a57f7e2c | 422 | return a->sockaddr.un.sun_path; |
a16e1123 | 423 | } |
c0120d99 | 424 | |
5bfcc1c6 | 425 | bool socket_ipv6_is_supported(void) { |
79a98c60 | 426 | _cleanup_free_ char *l = NULL; |
f89f1e8f AB |
427 | |
428 | if (access("/sys/module/ipv6", F_OK) != 0) | |
90ab5042 | 429 | return false; |
f89f1e8f AB |
430 | |
431 | /* If we can't check "disable" parameter, assume enabled */ | |
432 | if (read_one_line_file("/sys/module/ipv6/parameters/disable", &l) < 0) | |
90ab5042 | 433 | return true; |
f89f1e8f AB |
434 | |
435 | /* If module was loaded with disable=1 no IPv6 available */ | |
79a98c60 | 436 | return l[0] == '0'; |
5bfcc1c6 FF |
437 | } |
438 | ||
01e10de3 LP |
439 | bool socket_address_matches_fd(const SocketAddress *a, int fd) { |
440 | union sockaddr_union sa; | |
441 | socklen_t salen = sizeof(sa), solen; | |
442 | int protocol, type; | |
443 | ||
444 | assert(a); | |
445 | assert(fd >= 0); | |
446 | ||
447 | if (getsockname(fd, &sa.sa, &salen) < 0) | |
448 | return false; | |
449 | ||
450 | if (sa.sa.sa_family != a->sockaddr.sa.sa_family) | |
451 | return false; | |
452 | ||
453 | solen = sizeof(type); | |
454 | if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &solen) < 0) | |
455 | return false; | |
456 | ||
457 | if (type != a->type) | |
458 | return false; | |
459 | ||
460 | if (a->protocol != 0) { | |
461 | solen = sizeof(protocol); | |
462 | if (getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &protocol, &solen) < 0) | |
463 | return false; | |
464 | ||
465 | if (protocol != a->protocol) | |
466 | return false; | |
467 | } | |
468 | ||
469 | switch (sa.sa.sa_family) { | |
470 | ||
471 | case AF_INET: | |
4d49b48c LP |
472 | return sa.in.sin_port == a->sockaddr.in.sin_port && |
473 | sa.in.sin_addr.s_addr == a->sockaddr.in.sin_addr.s_addr; | |
01e10de3 LP |
474 | |
475 | case AF_INET6: | |
476 | return sa.in6.sin6_port == a->sockaddr.in6.sin6_port && | |
477 | memcmp(&sa.in6.sin6_addr, &a->sockaddr.in6.sin6_addr, sizeof(struct in6_addr)) == 0; | |
478 | ||
479 | case AF_UNIX: | |
480 | return salen == a->size && | |
481 | memcmp(sa.un.sun_path, a->sockaddr.un.sun_path, salen - offsetof(struct sockaddr_un, sun_path)) == 0; | |
482 | ||
483 | } | |
484 | ||
485 | return false; | |
486 | } | |
487 | ||
4d49b48c LP |
488 | int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, char **ret) { |
489 | union sockaddr_union *sa = (union sockaddr_union*) _sa; | |
8569a776 LP |
490 | char *p; |
491 | ||
4d49b48c LP |
492 | assert(sa); |
493 | assert(salen >= sizeof(sa->sa.sa_family)); | |
8569a776 | 494 | |
4d49b48c | 495 | switch (sa->sa.sa_family) { |
8569a776 LP |
496 | |
497 | case AF_INET: { | |
498 | uint32_t a; | |
499 | ||
4d49b48c | 500 | a = ntohl(sa->in.sin_addr.s_addr); |
8569a776 LP |
501 | |
502 | if (asprintf(&p, | |
503 | "%u.%u.%u.%u:%u", | |
504 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, | |
4d49b48c | 505 | ntohs(sa->in.sin_port)) < 0) |
8569a776 LP |
506 | return -ENOMEM; |
507 | ||
508 | break; | |
509 | } | |
510 | ||
511 | case AF_INET6: { | |
512 | static const unsigned char ipv4_prefix[] = { | |
513 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF | |
514 | }; | |
515 | ||
4d49b48c LP |
516 | if (translate_ipv6 && memcmp(&sa->in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { |
517 | const uint8_t *a = sa->in6.sin6_addr.s6_addr+12; | |
8569a776 LP |
518 | |
519 | if (asprintf(&p, | |
520 | "%u.%u.%u.%u:%u", | |
521 | a[0], a[1], a[2], a[3], | |
4d49b48c | 522 | ntohs(sa->in6.sin6_port)) < 0) |
8569a776 LP |
523 | return -ENOMEM; |
524 | } else { | |
525 | char a[INET6_ADDRSTRLEN]; | |
526 | ||
527 | if (asprintf(&p, | |
4d49b48c LP |
528 | "[%s]:%u", |
529 | inet_ntop(AF_INET6, &sa->in6.sin6_addr, a, sizeof(a)), | |
530 | ntohs(sa->in6.sin6_port)) < 0) | |
8569a776 LP |
531 | return -ENOMEM; |
532 | } | |
533 | ||
534 | break; | |
535 | } | |
536 | ||
4d49b48c LP |
537 | case AF_UNIX: |
538 | if (salen <= offsetof(struct sockaddr_un, sun_path)) { | |
539 | p = strdup("<unnamed>"); | |
540 | if (!p) | |
541 | return -ENOMEM; | |
8569a776 | 542 | |
4d49b48c LP |
543 | } else if (sa->un.sun_path[0] == 0) { |
544 | /* abstract */ | |
8569a776 | 545 | |
4d49b48c LP |
546 | /* FIXME: We assume we can print the |
547 | * socket path here and that it hasn't | |
548 | * more than one NUL byte. That is | |
549 | * actually an invalid assumption */ | |
550 | ||
551 | p = new(char, sizeof(sa->un.sun_path)+1); | |
552 | if (!p) | |
553 | return -ENOMEM; | |
554 | ||
555 | p[0] = '@'; | |
556 | memcpy(p+1, sa->un.sun_path+1, sizeof(sa->un.sun_path)-1); | |
557 | p[sizeof(sa->un.sun_path)] = 0; | |
558 | ||
559 | } else { | |
560 | p = strndup(sa->un.sun_path, sizeof(sa->un.sun_path)); | |
561 | if (!ret) | |
562 | return -ENOMEM; | |
563 | } | |
8569a776 LP |
564 | |
565 | break; | |
8569a776 LP |
566 | |
567 | default: | |
568 | return -ENOTSUP; | |
569 | } | |
570 | ||
4d49b48c | 571 | |
8569a776 LP |
572 | *ret = p; |
573 | return 0; | |
574 | } | |
575 | ||
4d49b48c LP |
576 | int getpeername_pretty(int fd, char **ret) { |
577 | union sockaddr_union sa; | |
b31f535c | 578 | socklen_t salen = sizeof(sa); |
eff05270 | 579 | int r; |
4d49b48c LP |
580 | |
581 | assert(fd >= 0); | |
582 | assert(ret); | |
583 | ||
4d49b48c LP |
584 | if (getpeername(fd, &sa.sa, &salen) < 0) |
585 | return -errno; | |
586 | ||
587 | if (sa.sa.sa_family == AF_UNIX) { | |
39883f62 | 588 | struct ucred ucred = {}; |
4d49b48c LP |
589 | |
590 | /* UNIX connection sockets are anonymous, so let's use | |
591 | * PID/UID as pretty credentials instead */ | |
592 | ||
eff05270 LP |
593 | r = getpeercred(fd, &ucred); |
594 | if (r < 0) | |
595 | return r; | |
4d49b48c | 596 | |
de0671ee | 597 | if (asprintf(ret, "PID "PID_FMT"/UID "UID_FMT, ucred.pid, ucred.uid) < 0) |
4d49b48c LP |
598 | return -ENOMEM; |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
603 | /* For remote sockets we translate IPv6 addresses back to IPv4 | |
604 | * if applicable, since that's nicer. */ | |
605 | ||
606 | return sockaddr_pretty(&sa.sa, salen, true, ret); | |
607 | } | |
608 | ||
609 | int getsockname_pretty(int fd, char **ret) { | |
610 | union sockaddr_union sa; | |
b31f535c | 611 | socklen_t salen = sizeof(sa); |
4d49b48c LP |
612 | |
613 | assert(fd >= 0); | |
614 | assert(ret); | |
615 | ||
4d49b48c LP |
616 | if (getsockname(fd, &sa.sa, &salen) < 0) |
617 | return -errno; | |
618 | ||
619 | /* For local sockets we do not translate IPv6 addresses back | |
620 | * to IPv6 if applicable, since this is usually used for | |
621 | * listening sockets where the difference between IPv4 and | |
622 | * IPv6 matters. */ | |
623 | ||
624 | return sockaddr_pretty(&sa.sa, salen, false, ret); | |
625 | } | |
626 | ||
b31f535c ZJS |
627 | int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret) { |
628 | int r; | |
629 | char host[NI_MAXHOST], *ret; | |
630 | ||
631 | assert(_ret); | |
632 | ||
633 | r = getnameinfo(&sa->sa, salen, host, sizeof(host), NULL, 0, | |
634 | NI_IDN|NI_IDN_USE_STD3_ASCII_RULES); | |
635 | if (r != 0) { | |
b31f535c ZJS |
636 | int saved_errno = errno; |
637 | ||
cb651834 ZJS |
638 | r = sockaddr_pretty(&sa->sa, salen, true, &ret); |
639 | if (r < 0) { | |
0a1beeb6 | 640 | log_error_errno(-r, "sockadd_pretty() failed: %m"); |
cb651834 ZJS |
641 | return r; |
642 | } | |
b31f535c | 643 | |
cb651834 ZJS |
644 | log_debug("getnameinfo(%s) failed: %s", ret, strerror(saved_errno)); |
645 | } else { | |
646 | ret = strdup(host); | |
647 | if (!ret) | |
648 | return log_oom(); | |
649 | } | |
b31f535c ZJS |
650 | |
651 | *_ret = ret; | |
652 | return 0; | |
653 | } | |
654 | ||
655 | int getnameinfo_pretty(int fd, char **ret) { | |
656 | union sockaddr_union sa; | |
657 | socklen_t salen = sizeof(sa); | |
658 | ||
659 | assert(fd >= 0); | |
660 | assert(ret); | |
661 | ||
662 | if (getsockname(fd, &sa.sa, &salen) < 0) { | |
663 | log_error("getsockname(%d) failed: %m", fd); | |
664 | return -errno; | |
665 | } | |
666 | ||
667 | return socknameinfo_pretty(&sa, salen, ret); | |
668 | } | |
669 | ||
bd1fe7c7 LP |
670 | int socket_address_unlink(SocketAddress *a) { |
671 | assert(a); | |
672 | ||
673 | if (socket_address_family(a) != AF_UNIX) | |
674 | return 0; | |
675 | ||
676 | if (a->sockaddr.un.sun_path[0] == 0) | |
677 | return 0; | |
678 | ||
679 | if (unlink(a->sockaddr.un.sun_path) < 0) | |
680 | return -errno; | |
681 | ||
682 | return 1; | |
683 | } | |
684 | ||
7a22745a LP |
685 | static const char* const netlink_family_table[] = { |
686 | [NETLINK_ROUTE] = "route", | |
687 | [NETLINK_FIREWALL] = "firewall", | |
688 | [NETLINK_INET_DIAG] = "inet-diag", | |
689 | [NETLINK_NFLOG] = "nflog", | |
690 | [NETLINK_XFRM] = "xfrm", | |
691 | [NETLINK_SELINUX] = "selinux", | |
692 | [NETLINK_ISCSI] = "iscsi", | |
693 | [NETLINK_AUDIT] = "audit", | |
694 | [NETLINK_FIB_LOOKUP] = "fib-lookup", | |
695 | [NETLINK_CONNECTOR] = "connector", | |
696 | [NETLINK_NETFILTER] = "netfilter", | |
697 | [NETLINK_IP6_FW] = "ip6-fw", | |
698 | [NETLINK_DNRTMSG] = "dnrtmsg", | |
699 | [NETLINK_KOBJECT_UEVENT] = "kobject-uevent", | |
700 | [NETLINK_GENERIC] = "generic", | |
701 | [NETLINK_SCSITRANSPORT] = "scsitransport", | |
702 | [NETLINK_ECRYPTFS] = "ecryptfs" | |
703 | }; | |
704 | ||
f8b69d1d | 705 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(netlink_family, int, INT_MAX); |
7a22745a | 706 | |
c0120d99 LP |
707 | static const char* const socket_address_bind_ipv6_only_table[_SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX] = { |
708 | [SOCKET_ADDRESS_DEFAULT] = "default", | |
709 | [SOCKET_ADDRESS_BOTH] = "both", | |
710 | [SOCKET_ADDRESS_IPV6_ONLY] = "ipv6-only" | |
711 | }; | |
712 | ||
713 | DEFINE_STRING_TABLE_LOOKUP(socket_address_bind_ipv6_only, SocketAddressBindIPv6Only); | |
f01e5736 LP |
714 | |
715 | bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b) { | |
716 | assert(a); | |
717 | assert(b); | |
718 | ||
719 | if (a->sa.sa_family != b->sa.sa_family) | |
720 | return false; | |
721 | ||
722 | if (a->sa.sa_family == AF_INET) | |
723 | return a->in.sin_addr.s_addr == b->in.sin_addr.s_addr; | |
724 | ||
725 | if (a->sa.sa_family == AF_INET6) | |
726 | return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr)) == 0; | |
727 | ||
728 | return false; | |
729 | } | |
db73295a LP |
730 | |
731 | char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR_TO_STRING_MAX]) { | |
732 | assert(addr); | |
733 | assert(buffer); | |
734 | ||
735 | /* Like ether_ntoa() but uses %02x instead of %x to print | |
736 | * ethernet addresses, which makes them look less funny. Also, | |
737 | * doesn't use a static buffer. */ | |
738 | ||
739 | sprintf(buffer, "%02x:%02x:%02x:%02x:%02x:%02x", | |
740 | addr->ether_addr_octet[0], | |
741 | addr->ether_addr_octet[1], | |
742 | addr->ether_addr_octet[2], | |
743 | addr->ether_addr_octet[3], | |
744 | addr->ether_addr_octet[4], | |
745 | addr->ether_addr_octet[5]); | |
746 | ||
747 | return buffer; | |
748 | } |