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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 <string.h> |
23 | #include <unistd.h> | |
24 | #include <errno.h> | |
42f4e3c4 LP |
25 | #include <arpa/inet.h> |
26 | #include <stdio.h> | |
542563ba | 27 | #include <net/if.h> |
b5a0699f | 28 | #include <sys/types.h> |
0e098b15 | 29 | #include <stddef.h> |
b31f535c | 30 | #include <netdb.h> |
42f4e3c4 LP |
31 | |
32 | #include "macro.h" | |
9eb977db | 33 | #include "path-util.h" |
2eec67ac | 34 | #include "util.h" |
42f4e3c4 | 35 | #include "socket-util.h" |
16c42ce1 | 36 | #include "missing.h" |
a5c32cff | 37 | #include "fileio.h" |
6482f626 | 38 | #include "formats-util.h" |
42f4e3c4 | 39 | |
542563ba | 40 | int socket_address_parse(SocketAddress *a, const char *s) { |
42f4e3c4 LP |
41 | char *e, *n; |
42 | unsigned u; | |
4d49b48c | 43 | int r; |
42f4e3c4 LP |
44 | |
45 | assert(a); | |
46 | assert(s); | |
47 | ||
9152c765 | 48 | zero(*a); |
542563ba | 49 | a->type = SOCK_STREAM; |
42f4e3c4 LP |
50 | |
51 | if (*s == '[') { | |
52 | /* IPv6 in [x:.....:z]:p notation */ | |
53 | ||
4d49b48c LP |
54 | e = strchr(s+1, ']'); |
55 | if (!e) | |
42f4e3c4 LP |
56 | return -EINVAL; |
57 | ||
4d49b48c | 58 | n = strndupa(s+1, e-s-1); |
42f4e3c4 LP |
59 | |
60 | errno = 0; | |
4d49b48c | 61 | if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0) |
8333c77e | 62 | return errno > 0 ? -errno : -EINVAL; |
42f4e3c4 LP |
63 | |
64 | e++; | |
65 | if (*e != ':') | |
66 | return -EINVAL; | |
67 | ||
68 | e++; | |
4d49b48c LP |
69 | r = safe_atou(e, &u); |
70 | if (r < 0) | |
42f4e3c4 LP |
71 | return r; |
72 | ||
73 | if (u <= 0 || u > 0xFFFF) | |
74 | return -EINVAL; | |
75 | ||
76 | a->sockaddr.in6.sin6_family = AF_INET6; | |
77 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
78 | a->size = sizeof(struct sockaddr_in6); | |
42f4e3c4 LP |
79 | |
80 | } else if (*s == '/') { | |
81 | /* AF_UNIX socket */ | |
82 | ||
83 | size_t l; | |
84 | ||
85 | l = strlen(s); | |
86 | if (l >= sizeof(a->sockaddr.un.sun_path)) | |
87 | return -EINVAL; | |
88 | ||
89 | a->sockaddr.un.sun_family = AF_UNIX; | |
90 | memcpy(a->sockaddr.un.sun_path, s, l); | |
0e098b15 | 91 | a->size = offsetof(struct sockaddr_un, sun_path) + l + 1; |
42f4e3c4 | 92 | |
1c24e7bd | 93 | } else if (*s == '@') { |
42f4e3c4 LP |
94 | /* Abstract AF_UNIX socket */ |
95 | size_t l; | |
96 | ||
97 | l = strlen(s+1); | |
98 | if (l >= sizeof(a->sockaddr.un.sun_path) - 1) | |
99 | return -EINVAL; | |
100 | ||
101 | a->sockaddr.un.sun_family = AF_UNIX; | |
102 | memcpy(a->sockaddr.un.sun_path+1, s+1, l); | |
0e098b15 | 103 | a->size = offsetof(struct sockaddr_un, sun_path) + 1 + l; |
42f4e3c4 LP |
104 | |
105 | } else { | |
4d49b48c LP |
106 | e = strchr(s, ':'); |
107 | if (e) { | |
108 | r = safe_atou(e+1, &u); | |
109 | if (r < 0) | |
542563ba LP |
110 | return r; |
111 | ||
112 | if (u <= 0 || u > 0xFFFF) | |
113 | return -EINVAL; | |
42f4e3c4 | 114 | |
4d49b48c | 115 | n = strndupa(s, e-s); |
42f4e3c4 | 116 | |
542563ba | 117 | /* IPv4 in w.x.y.z:p notation? */ |
4d49b48c LP |
118 | r = inet_pton(AF_INET, n, &a->sockaddr.in.sin_addr); |
119 | if (r < 0) | |
542563ba | 120 | return -errno; |
42f4e3c4 | 121 | |
542563ba LP |
122 | if (r > 0) { |
123 | /* Gotcha, it's a traditional IPv4 address */ | |
4d49b48c LP |
124 | a->sockaddr.in.sin_family = AF_INET; |
125 | a->sockaddr.in.sin_port = htons((uint16_t) u); | |
542563ba LP |
126 | a->size = sizeof(struct sockaddr_in); |
127 | } else { | |
128 | unsigned idx; | |
42f4e3c4 | 129 | |
4d49b48c | 130 | if (strlen(n) > IF_NAMESIZE-1) |
acbb0225 | 131 | return -EINVAL; |
acbb0225 | 132 | |
542563ba LP |
133 | /* Uh, our last resort, an interface name */ |
134 | idx = if_nametoindex(n); | |
83c60c9f | 135 | if (idx == 0) |
542563ba | 136 | return -EINVAL; |
42f4e3c4 | 137 | |
542563ba LP |
138 | a->sockaddr.in6.sin6_family = AF_INET6; |
139 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
140 | a->sockaddr.in6.sin6_scope_id = idx; | |
83c60c9f | 141 | a->sockaddr.in6.sin6_addr = in6addr_any; |
542563ba LP |
142 | a->size = sizeof(struct sockaddr_in6); |
143 | } | |
42f4e3c4 LP |
144 | } else { |
145 | ||
146 | /* Just a port */ | |
5198dabc LP |
147 | r = safe_atou(s, &u); |
148 | if (r < 0) | |
42f4e3c4 LP |
149 | return r; |
150 | ||
151 | if (u <= 0 || u > 0xFFFF) | |
152 | return -EINVAL; | |
153 | ||
5bfcc1c6 FF |
154 | if (socket_ipv6_is_supported()) { |
155 | a->sockaddr.in6.sin6_family = AF_INET6; | |
156 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
157 | a->sockaddr.in6.sin6_addr = in6addr_any; | |
158 | a->size = sizeof(struct sockaddr_in6); | |
159 | } else { | |
4d49b48c LP |
160 | a->sockaddr.in.sin_family = AF_INET; |
161 | a->sockaddr.in.sin_port = htons((uint16_t) u); | |
162 | a->sockaddr.in.sin_addr.s_addr = INADDR_ANY; | |
5bfcc1c6 FF |
163 | a->size = sizeof(struct sockaddr_in); |
164 | } | |
42f4e3c4 LP |
165 | } |
166 | } | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
7693146d LP |
171 | int socket_address_parse_and_warn(SocketAddress *a, const char *s) { |
172 | SocketAddress b; | |
173 | int r; | |
174 | ||
175 | /* Similar to socket_address_parse() but warns for IPv6 sockets when we don't support them. */ | |
176 | ||
177 | r = socket_address_parse(&b, s); | |
178 | if (r < 0) | |
179 | return r; | |
180 | ||
181 | if (!socket_ipv6_is_supported() && b.sockaddr.sa.sa_family == AF_INET6) { | |
182 | log_warning("Binding to IPv6 address not available since kernel does not support IPv6."); | |
183 | return -EAFNOSUPPORT; | |
184 | } | |
185 | ||
186 | *a = b; | |
187 | return 0; | |
188 | } | |
189 | ||
7a22745a LP |
190 | int socket_address_parse_netlink(SocketAddress *a, const char *s) { |
191 | int family; | |
192 | unsigned group = 0; | |
f8b69d1d | 193 | _cleanup_free_ char *sfamily = NULL; |
7a22745a LP |
194 | assert(a); |
195 | assert(s); | |
196 | ||
197 | zero(*a); | |
198 | a->type = SOCK_RAW; | |
199 | ||
200 | errno = 0; | |
201 | if (sscanf(s, "%ms %u", &sfamily, &group) < 1) | |
bcb161b0 | 202 | return errno > 0 ? -errno : -EINVAL; |
7a22745a | 203 | |
f8b69d1d MS |
204 | family = netlink_family_from_string(sfamily); |
205 | if (family < 0) | |
206 | return -EINVAL; | |
7a22745a LP |
207 | |
208 | a->sockaddr.nl.nl_family = AF_NETLINK; | |
209 | a->sockaddr.nl.nl_groups = group; | |
210 | ||
211 | a->type = SOCK_RAW; | |
212 | a->size = sizeof(struct sockaddr_nl); | |
213 | a->protocol = family; | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
542563ba | 218 | int socket_address_verify(const SocketAddress *a) { |
42f4e3c4 LP |
219 | assert(a); |
220 | ||
542563ba | 221 | switch (socket_address_family(a)) { |
42f4e3c4 | 222 | |
7a22745a LP |
223 | case AF_INET: |
224 | if (a->size != sizeof(struct sockaddr_in)) | |
225 | return -EINVAL; | |
42f4e3c4 | 226 | |
4d49b48c | 227 | if (a->sockaddr.in.sin_port == 0) |
7a22745a | 228 | return -EINVAL; |
42f4e3c4 | 229 | |
7a22745a LP |
230 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM) |
231 | return -EINVAL; | |
42f4e3c4 | 232 | |
7a22745a LP |
233 | return 0; |
234 | ||
235 | case AF_INET6: | |
236 | if (a->size != sizeof(struct sockaddr_in6)) | |
237 | return -EINVAL; | |
42f4e3c4 | 238 | |
7a22745a LP |
239 | if (a->sockaddr.in6.sin6_port == 0) |
240 | return -EINVAL; | |
42f4e3c4 | 241 | |
7a22745a LP |
242 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM) |
243 | return -EINVAL; | |
42f4e3c4 | 244 | |
7a22745a | 245 | return 0; |
42f4e3c4 | 246 | |
7a22745a LP |
247 | case AF_UNIX: |
248 | if (a->size < offsetof(struct sockaddr_un, sun_path)) | |
249 | return -EINVAL; | |
42f4e3c4 | 250 | |
7a22745a | 251 | if (a->size > offsetof(struct sockaddr_un, sun_path)) { |
42f4e3c4 | 252 | |
7a22745a LP |
253 | if (a->sockaddr.un.sun_path[0] != 0) { |
254 | char *e; | |
255 | ||
256 | /* path */ | |
4d49b48c LP |
257 | e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path)); |
258 | if (!e) | |
7a22745a LP |
259 | return -EINVAL; |
260 | ||
261 | if (a->size != offsetof(struct sockaddr_un, sun_path) + (e - a->sockaddr.un.sun_path) + 1) | |
262 | return -EINVAL; | |
42f4e3c4 | 263 | } |
7a22745a | 264 | } |
42f4e3c4 | 265 | |
5a2b80ce | 266 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM && a->type != SOCK_SEQPACKET) |
7a22745a | 267 | return -EINVAL; |
42f4e3c4 | 268 | |
7a22745a LP |
269 | return 0; |
270 | ||
271 | case AF_NETLINK: | |
272 | ||
273 | if (a->size != sizeof(struct sockaddr_nl)) | |
274 | return -EINVAL; | |
275 | ||
276 | if (a->type != SOCK_RAW && a->type != SOCK_DGRAM) | |
277 | return -EINVAL; | |
278 | ||
279 | return 0; | |
280 | ||
281 | default: | |
282 | return -EAFNOSUPPORT; | |
42f4e3c4 LP |
283 | } |
284 | } | |
285 | ||
4d49b48c | 286 | int socket_address_print(const SocketAddress *a, char **ret) { |
42f4e3c4 | 287 | int r; |
4d49b48c | 288 | |
42f4e3c4 | 289 | assert(a); |
4d49b48c | 290 | assert(ret); |
42f4e3c4 | 291 | |
4d49b48c LP |
292 | r = socket_address_verify(a); |
293 | if (r < 0) | |
42f4e3c4 LP |
294 | return r; |
295 | ||
4d49b48c | 296 | if (socket_address_family(a) == AF_NETLINK) { |
7fd1b19b | 297 | _cleanup_free_ char *sfamily = NULL; |
7a22745a | 298 | |
f8b69d1d | 299 | r = netlink_family_to_string_alloc(a->protocol, &sfamily); |
7a22745a | 300 | if (r < 0) |
f8b69d1d | 301 | return r; |
4d49b48c LP |
302 | |
303 | r = asprintf(ret, "%s %u", sfamily, a->sockaddr.nl.nl_groups); | |
8520cfa5 MS |
304 | if (r < 0) |
305 | return -ENOMEM; | |
7a22745a LP |
306 | |
307 | return 0; | |
308 | } | |
309 | ||
3b1c5241 | 310 | return sockaddr_pretty(&a->sockaddr.sa, a->size, false, true, ret); |
42f4e3c4 LP |
311 | } |
312 | ||
4f2d528d LP |
313 | bool socket_address_can_accept(const SocketAddress *a) { |
314 | assert(a); | |
315 | ||
316 | return | |
317 | a->type == SOCK_STREAM || | |
318 | a->type == SOCK_SEQPACKET; | |
319 | } | |
a16e1123 LP |
320 | |
321 | bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) { | |
322 | assert(a); | |
323 | assert(b); | |
324 | ||
325 | /* Invalid addresses are unequal to all */ | |
326 | if (socket_address_verify(a) < 0 || | |
327 | socket_address_verify(b) < 0) | |
328 | return false; | |
329 | ||
330 | if (a->type != b->type) | |
331 | return false; | |
332 | ||
a16e1123 LP |
333 | if (socket_address_family(a) != socket_address_family(b)) |
334 | return false; | |
335 | ||
336 | switch (socket_address_family(a)) { | |
337 | ||
338 | case AF_INET: | |
4d49b48c | 339 | if (a->sockaddr.in.sin_addr.s_addr != b->sockaddr.in.sin_addr.s_addr) |
a16e1123 LP |
340 | return false; |
341 | ||
4d49b48c | 342 | if (a->sockaddr.in.sin_port != b->sockaddr.in.sin_port) |
a16e1123 LP |
343 | return false; |
344 | ||
345 | break; | |
346 | ||
347 | case AF_INET6: | |
348 | if (memcmp(&a->sockaddr.in6.sin6_addr, &b->sockaddr.in6.sin6_addr, sizeof(a->sockaddr.in6.sin6_addr)) != 0) | |
349 | return false; | |
350 | ||
351 | if (a->sockaddr.in6.sin6_port != b->sockaddr.in6.sin6_port) | |
352 | return false; | |
353 | ||
354 | break; | |
355 | ||
356 | case AF_UNIX: | |
710708a5 MS |
357 | if (a->size <= offsetof(struct sockaddr_un, sun_path) || |
358 | b->size <= offsetof(struct sockaddr_un, sun_path)) | |
359 | return false; | |
360 | ||
a16e1123 LP |
361 | if ((a->sockaddr.un.sun_path[0] == 0) != (b->sockaddr.un.sun_path[0] == 0)) |
362 | return false; | |
363 | ||
364 | if (a->sockaddr.un.sun_path[0]) { | |
c78e47a6 | 365 | if (!path_equal_or_files_same(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path)) |
a16e1123 LP |
366 | return false; |
367 | } else { | |
c78e47a6 MS |
368 | if (a->size != b->size) |
369 | return false; | |
370 | ||
b12c1e7c | 371 | if (memcmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, a->size) != 0) |
a16e1123 LP |
372 | return false; |
373 | } | |
374 | ||
375 | break; | |
376 | ||
7a22745a | 377 | case AF_NETLINK: |
7a22745a LP |
378 | if (a->protocol != b->protocol) |
379 | return false; | |
380 | ||
381 | if (a->sockaddr.nl.nl_groups != b->sockaddr.nl.nl_groups) | |
382 | return false; | |
383 | ||
384 | break; | |
385 | ||
a16e1123 LP |
386 | default: |
387 | /* Cannot compare, so we assume the addresses are different */ | |
388 | return false; | |
389 | } | |
390 | ||
391 | return true; | |
392 | } | |
393 | ||
27ca8d7a | 394 | bool socket_address_is(const SocketAddress *a, const char *s, int type) { |
a16e1123 LP |
395 | struct SocketAddress b; |
396 | ||
397 | assert(a); | |
398 | assert(s); | |
399 | ||
400 | if (socket_address_parse(&b, s) < 0) | |
401 | return false; | |
402 | ||
27ca8d7a LP |
403 | b.type = type; |
404 | ||
a16e1123 | 405 | return socket_address_equal(a, &b); |
6e2ef85b LP |
406 | } |
407 | ||
7a22745a LP |
408 | bool socket_address_is_netlink(const SocketAddress *a, const char *s) { |
409 | struct SocketAddress b; | |
410 | ||
411 | assert(a); | |
412 | assert(s); | |
413 | ||
414 | if (socket_address_parse_netlink(&b, s) < 0) | |
415 | return false; | |
416 | ||
417 | return socket_address_equal(a, &b); | |
418 | } | |
419 | ||
a57f7e2c | 420 | const char* socket_address_get_path(const SocketAddress *a) { |
6e2ef85b LP |
421 | assert(a); |
422 | ||
423 | if (socket_address_family(a) != AF_UNIX) | |
a57f7e2c | 424 | return NULL; |
6e2ef85b LP |
425 | |
426 | if (a->sockaddr.un.sun_path[0] == 0) | |
a57f7e2c | 427 | return NULL; |
a16e1123 | 428 | |
a57f7e2c | 429 | return a->sockaddr.un.sun_path; |
a16e1123 | 430 | } |
c0120d99 | 431 | |
5bfcc1c6 | 432 | bool socket_ipv6_is_supported(void) { |
79a98c60 | 433 | _cleanup_free_ char *l = NULL; |
f89f1e8f AB |
434 | |
435 | if (access("/sys/module/ipv6", F_OK) != 0) | |
90ab5042 | 436 | return false; |
f89f1e8f AB |
437 | |
438 | /* If we can't check "disable" parameter, assume enabled */ | |
439 | if (read_one_line_file("/sys/module/ipv6/parameters/disable", &l) < 0) | |
90ab5042 | 440 | return true; |
f89f1e8f AB |
441 | |
442 | /* If module was loaded with disable=1 no IPv6 available */ | |
79a98c60 | 443 | return l[0] == '0'; |
5bfcc1c6 FF |
444 | } |
445 | ||
01e10de3 | 446 | bool socket_address_matches_fd(const SocketAddress *a, int fd) { |
dbafedac MS |
447 | SocketAddress b; |
448 | socklen_t solen; | |
01e10de3 LP |
449 | |
450 | assert(a); | |
451 | assert(fd >= 0); | |
452 | ||
dbafedac MS |
453 | b.size = sizeof(b.sockaddr); |
454 | if (getsockname(fd, &b.sockaddr.sa, &b.size) < 0) | |
01e10de3 LP |
455 | return false; |
456 | ||
dbafedac | 457 | if (b.sockaddr.sa.sa_family != a->sockaddr.sa.sa_family) |
01e10de3 LP |
458 | return false; |
459 | ||
dbafedac MS |
460 | solen = sizeof(b.type); |
461 | if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &b.type, &solen) < 0) | |
01e10de3 LP |
462 | return false; |
463 | ||
dbafedac | 464 | if (b.type != a->type) |
01e10de3 LP |
465 | return false; |
466 | ||
467 | if (a->protocol != 0) { | |
dbafedac MS |
468 | solen = sizeof(b.protocol); |
469 | if (getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &b.protocol, &solen) < 0) | |
01e10de3 LP |
470 | return false; |
471 | ||
dbafedac | 472 | if (b.protocol != a->protocol) |
01e10de3 LP |
473 | return false; |
474 | } | |
475 | ||
02233928 | 476 | return socket_address_equal(a, &b); |
01e10de3 LP |
477 | } |
478 | ||
3b1c5241 SL |
479 | int sockaddr_port(const struct sockaddr *_sa) { |
480 | union sockaddr_union *sa = (union sockaddr_union*) _sa; | |
481 | ||
482 | assert(sa); | |
483 | ||
484 | if (!IN_SET(sa->sa.sa_family, AF_INET, AF_INET6)) | |
485 | return -EAFNOSUPPORT; | |
486 | ||
487 | return ntohs(sa->sa.sa_family == AF_INET6 ? | |
488 | sa->in6.sin6_port : | |
489 | sa->in.sin_port); | |
490 | } | |
491 | ||
492 | int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret) { | |
4d49b48c | 493 | union sockaddr_union *sa = (union sockaddr_union*) _sa; |
8569a776 | 494 | char *p; |
fc25ad25 | 495 | int r; |
8569a776 | 496 | |
4d49b48c LP |
497 | assert(sa); |
498 | assert(salen >= sizeof(sa->sa.sa_family)); | |
8569a776 | 499 | |
4d49b48c | 500 | switch (sa->sa.sa_family) { |
8569a776 LP |
501 | |
502 | case AF_INET: { | |
503 | uint32_t a; | |
504 | ||
4d49b48c | 505 | a = ntohl(sa->in.sin_addr.s_addr); |
8569a776 | 506 | |
fc25ad25 ZJS |
507 | if (include_port) |
508 | r = asprintf(&p, | |
3b1c5241 SL |
509 | "%u.%u.%u.%u:%u", |
510 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, | |
fc25ad25 ZJS |
511 | ntohs(sa->in.sin_port)); |
512 | else | |
513 | r = asprintf(&p, | |
3b1c5241 | 514 | "%u.%u.%u.%u", |
fc25ad25 ZJS |
515 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF); |
516 | if (r < 0) | |
517 | return -ENOMEM; | |
8569a776 LP |
518 | break; |
519 | } | |
520 | ||
521 | case AF_INET6: { | |
522 | static const unsigned char ipv4_prefix[] = { | |
523 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF | |
524 | }; | |
525 | ||
fc25ad25 ZJS |
526 | if (translate_ipv6 && |
527 | memcmp(&sa->in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { | |
4d49b48c | 528 | const uint8_t *a = sa->in6.sin6_addr.s6_addr+12; |
fc25ad25 ZJS |
529 | if (include_port) |
530 | r = asprintf(&p, | |
3b1c5241 SL |
531 | "%u.%u.%u.%u:%u", |
532 | a[0], a[1], a[2], a[3], | |
fc25ad25 ZJS |
533 | ntohs(sa->in6.sin6_port)); |
534 | else | |
535 | r = asprintf(&p, | |
3b1c5241 | 536 | "%u.%u.%u.%u", |
fc25ad25 ZJS |
537 | a[0], a[1], a[2], a[3]); |
538 | if (r < 0) | |
539 | return -ENOMEM; | |
8569a776 LP |
540 | } else { |
541 | char a[INET6_ADDRSTRLEN]; | |
542 | ||
3b1c5241 SL |
543 | inet_ntop(AF_INET6, &sa->in6.sin6_addr, a, sizeof(a)); |
544 | ||
545 | if (include_port) { | |
fc25ad25 | 546 | r = asprintf(&p, |
3b1c5241 SL |
547 | "[%s]:%u", |
548 | a, | |
fc25ad25 ZJS |
549 | ntohs(sa->in6.sin6_port)); |
550 | if (r < 0) | |
3b1c5241 SL |
551 | return -ENOMEM; |
552 | } else { | |
553 | p = strdup(a); | |
554 | if (!p) | |
555 | return -ENOMEM; | |
556 | } | |
8569a776 LP |
557 | } |
558 | ||
559 | break; | |
560 | } | |
561 | ||
4d49b48c LP |
562 | case AF_UNIX: |
563 | if (salen <= offsetof(struct sockaddr_un, sun_path)) { | |
564 | p = strdup("<unnamed>"); | |
565 | if (!p) | |
566 | return -ENOMEM; | |
8569a776 | 567 | |
4d49b48c LP |
568 | } else if (sa->un.sun_path[0] == 0) { |
569 | /* abstract */ | |
8569a776 | 570 | |
4d49b48c LP |
571 | /* FIXME: We assume we can print the |
572 | * socket path here and that it hasn't | |
573 | * more than one NUL byte. That is | |
574 | * actually an invalid assumption */ | |
575 | ||
576 | p = new(char, sizeof(sa->un.sun_path)+1); | |
577 | if (!p) | |
578 | return -ENOMEM; | |
579 | ||
580 | p[0] = '@'; | |
581 | memcpy(p+1, sa->un.sun_path+1, sizeof(sa->un.sun_path)-1); | |
582 | p[sizeof(sa->un.sun_path)] = 0; | |
583 | ||
584 | } else { | |
585 | p = strndup(sa->un.sun_path, sizeof(sa->un.sun_path)); | |
586 | if (!ret) | |
587 | return -ENOMEM; | |
588 | } | |
8569a776 LP |
589 | |
590 | break; | |
8569a776 LP |
591 | |
592 | default: | |
15411c0c | 593 | return -EOPNOTSUPP; |
8569a776 LP |
594 | } |
595 | ||
4d49b48c | 596 | |
8569a776 LP |
597 | *ret = p; |
598 | return 0; | |
599 | } | |
600 | ||
4d49b48c LP |
601 | int getpeername_pretty(int fd, char **ret) { |
602 | union sockaddr_union sa; | |
b31f535c | 603 | socklen_t salen = sizeof(sa); |
eff05270 | 604 | int r; |
4d49b48c LP |
605 | |
606 | assert(fd >= 0); | |
607 | assert(ret); | |
608 | ||
4d49b48c LP |
609 | if (getpeername(fd, &sa.sa, &salen) < 0) |
610 | return -errno; | |
611 | ||
612 | if (sa.sa.sa_family == AF_UNIX) { | |
39883f62 | 613 | struct ucred ucred = {}; |
4d49b48c LP |
614 | |
615 | /* UNIX connection sockets are anonymous, so let's use | |
616 | * PID/UID as pretty credentials instead */ | |
617 | ||
eff05270 LP |
618 | r = getpeercred(fd, &ucred); |
619 | if (r < 0) | |
620 | return r; | |
4d49b48c | 621 | |
de0671ee | 622 | if (asprintf(ret, "PID "PID_FMT"/UID "UID_FMT, ucred.pid, ucred.uid) < 0) |
4d49b48c LP |
623 | return -ENOMEM; |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | /* For remote sockets we translate IPv6 addresses back to IPv4 | |
629 | * if applicable, since that's nicer. */ | |
630 | ||
3b1c5241 | 631 | return sockaddr_pretty(&sa.sa, salen, true, true, ret); |
4d49b48c LP |
632 | } |
633 | ||
634 | int getsockname_pretty(int fd, char **ret) { | |
635 | union sockaddr_union sa; | |
b31f535c | 636 | socklen_t salen = sizeof(sa); |
4d49b48c LP |
637 | |
638 | assert(fd >= 0); | |
639 | assert(ret); | |
640 | ||
4d49b48c LP |
641 | if (getsockname(fd, &sa.sa, &salen) < 0) |
642 | return -errno; | |
643 | ||
644 | /* For local sockets we do not translate IPv6 addresses back | |
645 | * to IPv6 if applicable, since this is usually used for | |
646 | * listening sockets where the difference between IPv4 and | |
647 | * IPv6 matters. */ | |
648 | ||
3b1c5241 | 649 | return sockaddr_pretty(&sa.sa, salen, false, true, ret); |
4d49b48c LP |
650 | } |
651 | ||
b31f535c ZJS |
652 | int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret) { |
653 | int r; | |
654 | char host[NI_MAXHOST], *ret; | |
655 | ||
656 | assert(_ret); | |
657 | ||
658 | r = getnameinfo(&sa->sa, salen, host, sizeof(host), NULL, 0, | |
659 | NI_IDN|NI_IDN_USE_STD3_ASCII_RULES); | |
660 | if (r != 0) { | |
b31f535c ZJS |
661 | int saved_errno = errno; |
662 | ||
3b1c5241 | 663 | r = sockaddr_pretty(&sa->sa, salen, true, true, &ret); |
f647962d | 664 | if (r < 0) |
1938ac51 | 665 | return r; |
b31f535c | 666 | |
279d3c9c | 667 | log_debug_errno(saved_errno, "getnameinfo(%s) failed: %m", ret); |
cb651834 ZJS |
668 | } else { |
669 | ret = strdup(host); | |
670 | if (!ret) | |
1938ac51 | 671 | return -ENOMEM; |
cb651834 | 672 | } |
b31f535c ZJS |
673 | |
674 | *_ret = ret; | |
675 | return 0; | |
676 | } | |
677 | ||
678 | int getnameinfo_pretty(int fd, char **ret) { | |
679 | union sockaddr_union sa; | |
680 | socklen_t salen = sizeof(sa); | |
681 | ||
682 | assert(fd >= 0); | |
683 | assert(ret); | |
684 | ||
4a62c710 | 685 | if (getsockname(fd, &sa.sa, &salen) < 0) |
1938ac51 | 686 | return -errno; |
b31f535c ZJS |
687 | |
688 | return socknameinfo_pretty(&sa, salen, ret); | |
689 | } | |
690 | ||
bd1fe7c7 LP |
691 | int socket_address_unlink(SocketAddress *a) { |
692 | assert(a); | |
693 | ||
694 | if (socket_address_family(a) != AF_UNIX) | |
695 | return 0; | |
696 | ||
697 | if (a->sockaddr.un.sun_path[0] == 0) | |
698 | return 0; | |
699 | ||
700 | if (unlink(a->sockaddr.un.sun_path) < 0) | |
701 | return -errno; | |
702 | ||
703 | return 1; | |
704 | } | |
705 | ||
7a22745a LP |
706 | static const char* const netlink_family_table[] = { |
707 | [NETLINK_ROUTE] = "route", | |
708 | [NETLINK_FIREWALL] = "firewall", | |
709 | [NETLINK_INET_DIAG] = "inet-diag", | |
710 | [NETLINK_NFLOG] = "nflog", | |
711 | [NETLINK_XFRM] = "xfrm", | |
712 | [NETLINK_SELINUX] = "selinux", | |
713 | [NETLINK_ISCSI] = "iscsi", | |
714 | [NETLINK_AUDIT] = "audit", | |
715 | [NETLINK_FIB_LOOKUP] = "fib-lookup", | |
716 | [NETLINK_CONNECTOR] = "connector", | |
717 | [NETLINK_NETFILTER] = "netfilter", | |
718 | [NETLINK_IP6_FW] = "ip6-fw", | |
719 | [NETLINK_DNRTMSG] = "dnrtmsg", | |
720 | [NETLINK_KOBJECT_UEVENT] = "kobject-uevent", | |
721 | [NETLINK_GENERIC] = "generic", | |
722 | [NETLINK_SCSITRANSPORT] = "scsitransport", | |
723 | [NETLINK_ECRYPTFS] = "ecryptfs" | |
724 | }; | |
725 | ||
f8b69d1d | 726 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(netlink_family, int, INT_MAX); |
7a22745a | 727 | |
c0120d99 LP |
728 | static const char* const socket_address_bind_ipv6_only_table[_SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX] = { |
729 | [SOCKET_ADDRESS_DEFAULT] = "default", | |
730 | [SOCKET_ADDRESS_BOTH] = "both", | |
731 | [SOCKET_ADDRESS_IPV6_ONLY] = "ipv6-only" | |
732 | }; | |
733 | ||
734 | DEFINE_STRING_TABLE_LOOKUP(socket_address_bind_ipv6_only, SocketAddressBindIPv6Only); | |
f01e5736 LP |
735 | |
736 | bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b) { | |
737 | assert(a); | |
738 | assert(b); | |
739 | ||
740 | if (a->sa.sa_family != b->sa.sa_family) | |
741 | return false; | |
742 | ||
743 | if (a->sa.sa_family == AF_INET) | |
744 | return a->in.sin_addr.s_addr == b->in.sin_addr.s_addr; | |
745 | ||
746 | if (a->sa.sa_family == AF_INET6) | |
747 | return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr)) == 0; | |
748 | ||
749 | return false; | |
750 | } | |
db73295a LP |
751 | |
752 | char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR_TO_STRING_MAX]) { | |
753 | assert(addr); | |
754 | assert(buffer); | |
755 | ||
756 | /* Like ether_ntoa() but uses %02x instead of %x to print | |
757 | * ethernet addresses, which makes them look less funny. Also, | |
758 | * doesn't use a static buffer. */ | |
759 | ||
760 | sprintf(buffer, "%02x:%02x:%02x:%02x:%02x:%02x", | |
761 | addr->ether_addr_octet[0], | |
762 | addr->ether_addr_octet[1], | |
763 | addr->ether_addr_octet[2], | |
764 | addr->ether_addr_octet[3], | |
765 | addr->ether_addr_octet[4], | |
766 | addr->ether_addr_octet[5]); | |
767 | ||
768 | return buffer; | |
769 | } |