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