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