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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 | 22 | #include <arpa/inet.h> |
07630cea | 23 | #include <errno.h> |
542563ba | 24 | #include <net/if.h> |
b31f535c | 25 | #include <netdb.h> |
07630cea LP |
26 | #include <stddef.h> |
27 | #include <stdio.h> | |
28 | #include <string.h> | |
29 | #include <sys/types.h> | |
30 | #include <unistd.h> | |
42f4e3c4 | 31 | |
07630cea LP |
32 | #include "fileio.h" |
33 | #include "formats-util.h" | |
42f4e3c4 | 34 | #include "macro.h" |
07630cea | 35 | #include "missing.h" |
9eb977db | 36 | #include "path-util.h" |
07630cea | 37 | #include "string-util.h" |
2eec67ac | 38 | #include "util.h" |
42f4e3c4 LP |
39 | #include "socket-util.h" |
40 | ||
542563ba | 41 | int socket_address_parse(SocketAddress *a, const char *s) { |
42f4e3c4 LP |
42 | char *e, *n; |
43 | unsigned u; | |
4d49b48c | 44 | int r; |
42f4e3c4 LP |
45 | |
46 | assert(a); | |
47 | assert(s); | |
48 | ||
9152c765 | 49 | zero(*a); |
542563ba | 50 | a->type = SOCK_STREAM; |
42f4e3c4 LP |
51 | |
52 | if (*s == '[') { | |
53 | /* IPv6 in [x:.....:z]:p notation */ | |
54 | ||
4d49b48c LP |
55 | e = strchr(s+1, ']'); |
56 | if (!e) | |
42f4e3c4 LP |
57 | return -EINVAL; |
58 | ||
4d49b48c | 59 | n = strndupa(s+1, e-s-1); |
42f4e3c4 LP |
60 | |
61 | errno = 0; | |
4d49b48c | 62 | if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0) |
8333c77e | 63 | return errno > 0 ? -errno : -EINVAL; |
42f4e3c4 LP |
64 | |
65 | e++; | |
66 | if (*e != ':') | |
67 | return -EINVAL; | |
68 | ||
69 | e++; | |
4d49b48c LP |
70 | r = safe_atou(e, &u); |
71 | if (r < 0) | |
42f4e3c4 LP |
72 | return r; |
73 | ||
74 | if (u <= 0 || u > 0xFFFF) | |
75 | return -EINVAL; | |
76 | ||
77 | a->sockaddr.in6.sin6_family = AF_INET6; | |
78 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
79 | a->size = sizeof(struct sockaddr_in6); | |
42f4e3c4 LP |
80 | |
81 | } else if (*s == '/') { | |
82 | /* AF_UNIX socket */ | |
83 | ||
84 | size_t l; | |
85 | ||
86 | l = strlen(s); | |
87 | if (l >= sizeof(a->sockaddr.un.sun_path)) | |
88 | return -EINVAL; | |
89 | ||
90 | a->sockaddr.un.sun_family = AF_UNIX; | |
91 | memcpy(a->sockaddr.un.sun_path, s, l); | |
0e098b15 | 92 | a->size = offsetof(struct sockaddr_un, sun_path) + l + 1; |
42f4e3c4 | 93 | |
1c24e7bd | 94 | } else if (*s == '@') { |
42f4e3c4 LP |
95 | /* Abstract AF_UNIX socket */ |
96 | size_t l; | |
97 | ||
98 | l = strlen(s+1); | |
99 | if (l >= sizeof(a->sockaddr.un.sun_path) - 1) | |
100 | return -EINVAL; | |
101 | ||
102 | a->sockaddr.un.sun_family = AF_UNIX; | |
103 | memcpy(a->sockaddr.un.sun_path+1, s+1, l); | |
0e098b15 | 104 | a->size = offsetof(struct sockaddr_un, sun_path) + 1 + l; |
42f4e3c4 LP |
105 | |
106 | } else { | |
4d49b48c LP |
107 | e = strchr(s, ':'); |
108 | if (e) { | |
109 | r = safe_atou(e+1, &u); | |
110 | if (r < 0) | |
542563ba LP |
111 | return r; |
112 | ||
113 | if (u <= 0 || u > 0xFFFF) | |
114 | return -EINVAL; | |
42f4e3c4 | 115 | |
4d49b48c | 116 | n = strndupa(s, e-s); |
42f4e3c4 | 117 | |
542563ba | 118 | /* IPv4 in w.x.y.z:p notation? */ |
4d49b48c LP |
119 | r = inet_pton(AF_INET, n, &a->sockaddr.in.sin_addr); |
120 | if (r < 0) | |
542563ba | 121 | return -errno; |
42f4e3c4 | 122 | |
542563ba LP |
123 | if (r > 0) { |
124 | /* Gotcha, it's a traditional IPv4 address */ | |
4d49b48c LP |
125 | a->sockaddr.in.sin_family = AF_INET; |
126 | a->sockaddr.in.sin_port = htons((uint16_t) u); | |
542563ba LP |
127 | a->size = sizeof(struct sockaddr_in); |
128 | } else { | |
129 | unsigned idx; | |
42f4e3c4 | 130 | |
4d49b48c | 131 | if (strlen(n) > IF_NAMESIZE-1) |
acbb0225 | 132 | return -EINVAL; |
acbb0225 | 133 | |
542563ba LP |
134 | /* Uh, our last resort, an interface name */ |
135 | idx = if_nametoindex(n); | |
83c60c9f | 136 | if (idx == 0) |
542563ba | 137 | return -EINVAL; |
42f4e3c4 | 138 | |
542563ba LP |
139 | a->sockaddr.in6.sin6_family = AF_INET6; |
140 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
141 | a->sockaddr.in6.sin6_scope_id = idx; | |
83c60c9f | 142 | a->sockaddr.in6.sin6_addr = in6addr_any; |
542563ba LP |
143 | a->size = sizeof(struct sockaddr_in6); |
144 | } | |
42f4e3c4 LP |
145 | } else { |
146 | ||
147 | /* Just a port */ | |
5198dabc LP |
148 | r = safe_atou(s, &u); |
149 | if (r < 0) | |
42f4e3c4 LP |
150 | return r; |
151 | ||
152 | if (u <= 0 || u > 0xFFFF) | |
153 | return -EINVAL; | |
154 | ||
5bfcc1c6 FF |
155 | if (socket_ipv6_is_supported()) { |
156 | a->sockaddr.in6.sin6_family = AF_INET6; | |
157 | a->sockaddr.in6.sin6_port = htons((uint16_t) u); | |
158 | a->sockaddr.in6.sin6_addr = in6addr_any; | |
159 | a->size = sizeof(struct sockaddr_in6); | |
160 | } else { | |
4d49b48c LP |
161 | a->sockaddr.in.sin_family = AF_INET; |
162 | a->sockaddr.in.sin_port = htons((uint16_t) u); | |
163 | a->sockaddr.in.sin_addr.s_addr = INADDR_ANY; | |
5bfcc1c6 FF |
164 | a->size = sizeof(struct sockaddr_in); |
165 | } | |
42f4e3c4 LP |
166 | } |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
7693146d LP |
172 | int socket_address_parse_and_warn(SocketAddress *a, const char *s) { |
173 | SocketAddress b; | |
174 | int r; | |
175 | ||
176 | /* Similar to socket_address_parse() but warns for IPv6 sockets when we don't support them. */ | |
177 | ||
178 | r = socket_address_parse(&b, s); | |
179 | if (r < 0) | |
180 | return r; | |
181 | ||
182 | if (!socket_ipv6_is_supported() && b.sockaddr.sa.sa_family == AF_INET6) { | |
183 | log_warning("Binding to IPv6 address not available since kernel does not support IPv6."); | |
184 | return -EAFNOSUPPORT; | |
185 | } | |
186 | ||
187 | *a = b; | |
188 | return 0; | |
189 | } | |
190 | ||
7a22745a LP |
191 | int socket_address_parse_netlink(SocketAddress *a, const char *s) { |
192 | int family; | |
193 | unsigned group = 0; | |
f8b69d1d | 194 | _cleanup_free_ char *sfamily = NULL; |
7a22745a LP |
195 | assert(a); |
196 | assert(s); | |
197 | ||
198 | zero(*a); | |
199 | a->type = SOCK_RAW; | |
200 | ||
201 | errno = 0; | |
202 | if (sscanf(s, "%ms %u", &sfamily, &group) < 1) | |
bcb161b0 | 203 | return errno > 0 ? -errno : -EINVAL; |
7a22745a | 204 | |
f8b69d1d MS |
205 | family = netlink_family_from_string(sfamily); |
206 | if (family < 0) | |
207 | return -EINVAL; | |
7a22745a LP |
208 | |
209 | a->sockaddr.nl.nl_family = AF_NETLINK; | |
210 | a->sockaddr.nl.nl_groups = group; | |
211 | ||
212 | a->type = SOCK_RAW; | |
213 | a->size = sizeof(struct sockaddr_nl); | |
214 | a->protocol = family; | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
542563ba | 219 | int socket_address_verify(const SocketAddress *a) { |
42f4e3c4 LP |
220 | assert(a); |
221 | ||
542563ba | 222 | switch (socket_address_family(a)) { |
42f4e3c4 | 223 | |
7a22745a LP |
224 | case AF_INET: |
225 | if (a->size != sizeof(struct sockaddr_in)) | |
226 | return -EINVAL; | |
42f4e3c4 | 227 | |
4d49b48c | 228 | if (a->sockaddr.in.sin_port == 0) |
7a22745a | 229 | return -EINVAL; |
42f4e3c4 | 230 | |
7a22745a LP |
231 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM) |
232 | return -EINVAL; | |
42f4e3c4 | 233 | |
7a22745a LP |
234 | return 0; |
235 | ||
236 | case AF_INET6: | |
237 | if (a->size != sizeof(struct sockaddr_in6)) | |
238 | return -EINVAL; | |
42f4e3c4 | 239 | |
7a22745a LP |
240 | if (a->sockaddr.in6.sin6_port == 0) |
241 | return -EINVAL; | |
42f4e3c4 | 242 | |
7a22745a LP |
243 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM) |
244 | return -EINVAL; | |
42f4e3c4 | 245 | |
7a22745a | 246 | return 0; |
42f4e3c4 | 247 | |
7a22745a LP |
248 | case AF_UNIX: |
249 | if (a->size < offsetof(struct sockaddr_un, sun_path)) | |
250 | return -EINVAL; | |
42f4e3c4 | 251 | |
7a22745a | 252 | if (a->size > offsetof(struct sockaddr_un, sun_path)) { |
42f4e3c4 | 253 | |
7a22745a LP |
254 | if (a->sockaddr.un.sun_path[0] != 0) { |
255 | char *e; | |
256 | ||
257 | /* path */ | |
4d49b48c LP |
258 | e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path)); |
259 | if (!e) | |
7a22745a LP |
260 | return -EINVAL; |
261 | ||
262 | if (a->size != offsetof(struct sockaddr_un, sun_path) + (e - a->sockaddr.un.sun_path) + 1) | |
263 | return -EINVAL; | |
42f4e3c4 | 264 | } |
7a22745a | 265 | } |
42f4e3c4 | 266 | |
5a2b80ce | 267 | if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM && a->type != SOCK_SEQPACKET) |
7a22745a | 268 | return -EINVAL; |
42f4e3c4 | 269 | |
7a22745a LP |
270 | return 0; |
271 | ||
272 | case AF_NETLINK: | |
273 | ||
274 | if (a->size != sizeof(struct sockaddr_nl)) | |
275 | return -EINVAL; | |
276 | ||
277 | if (a->type != SOCK_RAW && a->type != SOCK_DGRAM) | |
278 | return -EINVAL; | |
279 | ||
280 | return 0; | |
281 | ||
282 | default: | |
283 | return -EAFNOSUPPORT; | |
42f4e3c4 LP |
284 | } |
285 | } | |
286 | ||
4d49b48c | 287 | int socket_address_print(const SocketAddress *a, char **ret) { |
42f4e3c4 | 288 | int r; |
4d49b48c | 289 | |
42f4e3c4 | 290 | assert(a); |
4d49b48c | 291 | assert(ret); |
42f4e3c4 | 292 | |
4d49b48c LP |
293 | r = socket_address_verify(a); |
294 | if (r < 0) | |
42f4e3c4 LP |
295 | return r; |
296 | ||
4d49b48c | 297 | if (socket_address_family(a) == AF_NETLINK) { |
7fd1b19b | 298 | _cleanup_free_ char *sfamily = NULL; |
7a22745a | 299 | |
f8b69d1d | 300 | r = netlink_family_to_string_alloc(a->protocol, &sfamily); |
7a22745a | 301 | if (r < 0) |
f8b69d1d | 302 | return r; |
4d49b48c LP |
303 | |
304 | r = asprintf(ret, "%s %u", sfamily, a->sockaddr.nl.nl_groups); | |
8520cfa5 MS |
305 | if (r < 0) |
306 | return -ENOMEM; | |
7a22745a LP |
307 | |
308 | return 0; | |
309 | } | |
310 | ||
3b1c5241 | 311 | return sockaddr_pretty(&a->sockaddr.sa, a->size, false, true, ret); |
42f4e3c4 LP |
312 | } |
313 | ||
4f2d528d LP |
314 | bool socket_address_can_accept(const SocketAddress *a) { |
315 | assert(a); | |
316 | ||
317 | return | |
318 | a->type == SOCK_STREAM || | |
319 | a->type == SOCK_SEQPACKET; | |
320 | } | |
a16e1123 LP |
321 | |
322 | bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) { | |
323 | assert(a); | |
324 | assert(b); | |
325 | ||
326 | /* Invalid addresses are unequal to all */ | |
327 | if (socket_address_verify(a) < 0 || | |
328 | socket_address_verify(b) < 0) | |
329 | return false; | |
330 | ||
331 | if (a->type != b->type) | |
332 | return false; | |
333 | ||
a16e1123 LP |
334 | if (socket_address_family(a) != socket_address_family(b)) |
335 | return false; | |
336 | ||
337 | switch (socket_address_family(a)) { | |
338 | ||
339 | case AF_INET: | |
4d49b48c | 340 | if (a->sockaddr.in.sin_addr.s_addr != b->sockaddr.in.sin_addr.s_addr) |
a16e1123 LP |
341 | return false; |
342 | ||
4d49b48c | 343 | if (a->sockaddr.in.sin_port != b->sockaddr.in.sin_port) |
a16e1123 LP |
344 | return false; |
345 | ||
346 | break; | |
347 | ||
348 | case AF_INET6: | |
349 | if (memcmp(&a->sockaddr.in6.sin6_addr, &b->sockaddr.in6.sin6_addr, sizeof(a->sockaddr.in6.sin6_addr)) != 0) | |
350 | return false; | |
351 | ||
352 | if (a->sockaddr.in6.sin6_port != b->sockaddr.in6.sin6_port) | |
353 | return false; | |
354 | ||
355 | break; | |
356 | ||
357 | case AF_UNIX: | |
710708a5 MS |
358 | if (a->size <= offsetof(struct sockaddr_un, sun_path) || |
359 | b->size <= offsetof(struct sockaddr_un, sun_path)) | |
360 | return false; | |
361 | ||
a16e1123 LP |
362 | if ((a->sockaddr.un.sun_path[0] == 0) != (b->sockaddr.un.sun_path[0] == 0)) |
363 | return false; | |
364 | ||
365 | if (a->sockaddr.un.sun_path[0]) { | |
c78e47a6 | 366 | if (!path_equal_or_files_same(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path)) |
a16e1123 LP |
367 | return false; |
368 | } else { | |
c78e47a6 MS |
369 | if (a->size != b->size) |
370 | return false; | |
371 | ||
b12c1e7c | 372 | if (memcmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, a->size) != 0) |
a16e1123 LP |
373 | return false; |
374 | } | |
375 | ||
376 | break; | |
377 | ||
7a22745a | 378 | case AF_NETLINK: |
7a22745a LP |
379 | if (a->protocol != b->protocol) |
380 | return false; | |
381 | ||
382 | if (a->sockaddr.nl.nl_groups != b->sockaddr.nl.nl_groups) | |
383 | return false; | |
384 | ||
385 | break; | |
386 | ||
a16e1123 LP |
387 | default: |
388 | /* Cannot compare, so we assume the addresses are different */ | |
389 | return false; | |
390 | } | |
391 | ||
392 | return true; | |
393 | } | |
394 | ||
27ca8d7a | 395 | bool socket_address_is(const SocketAddress *a, const char *s, int type) { |
a16e1123 LP |
396 | struct SocketAddress b; |
397 | ||
398 | assert(a); | |
399 | assert(s); | |
400 | ||
401 | if (socket_address_parse(&b, s) < 0) | |
402 | return false; | |
403 | ||
27ca8d7a LP |
404 | b.type = type; |
405 | ||
a16e1123 | 406 | return socket_address_equal(a, &b); |
6e2ef85b LP |
407 | } |
408 | ||
7a22745a LP |
409 | bool socket_address_is_netlink(const SocketAddress *a, const char *s) { |
410 | struct SocketAddress b; | |
411 | ||
412 | assert(a); | |
413 | assert(s); | |
414 | ||
415 | if (socket_address_parse_netlink(&b, s) < 0) | |
416 | return false; | |
417 | ||
418 | return socket_address_equal(a, &b); | |
419 | } | |
420 | ||
a57f7e2c | 421 | const char* socket_address_get_path(const SocketAddress *a) { |
6e2ef85b LP |
422 | assert(a); |
423 | ||
424 | if (socket_address_family(a) != AF_UNIX) | |
a57f7e2c | 425 | return NULL; |
6e2ef85b LP |
426 | |
427 | if (a->sockaddr.un.sun_path[0] == 0) | |
a57f7e2c | 428 | return NULL; |
a16e1123 | 429 | |
a57f7e2c | 430 | return a->sockaddr.un.sun_path; |
a16e1123 | 431 | } |
c0120d99 | 432 | |
5bfcc1c6 | 433 | bool socket_ipv6_is_supported(void) { |
79a98c60 | 434 | _cleanup_free_ char *l = NULL; |
f89f1e8f AB |
435 | |
436 | if (access("/sys/module/ipv6", F_OK) != 0) | |
90ab5042 | 437 | return false; |
f89f1e8f AB |
438 | |
439 | /* If we can't check "disable" parameter, assume enabled */ | |
440 | if (read_one_line_file("/sys/module/ipv6/parameters/disable", &l) < 0) | |
90ab5042 | 441 | return true; |
f89f1e8f AB |
442 | |
443 | /* If module was loaded with disable=1 no IPv6 available */ | |
79a98c60 | 444 | return l[0] == '0'; |
5bfcc1c6 FF |
445 | } |
446 | ||
01e10de3 | 447 | bool socket_address_matches_fd(const SocketAddress *a, int fd) { |
dbafedac MS |
448 | SocketAddress b; |
449 | socklen_t solen; | |
01e10de3 LP |
450 | |
451 | assert(a); | |
452 | assert(fd >= 0); | |
453 | ||
dbafedac MS |
454 | b.size = sizeof(b.sockaddr); |
455 | if (getsockname(fd, &b.sockaddr.sa, &b.size) < 0) | |
01e10de3 LP |
456 | return false; |
457 | ||
dbafedac | 458 | if (b.sockaddr.sa.sa_family != a->sockaddr.sa.sa_family) |
01e10de3 LP |
459 | return false; |
460 | ||
dbafedac MS |
461 | solen = sizeof(b.type); |
462 | if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &b.type, &solen) < 0) | |
01e10de3 LP |
463 | return false; |
464 | ||
dbafedac | 465 | if (b.type != a->type) |
01e10de3 LP |
466 | return false; |
467 | ||
468 | if (a->protocol != 0) { | |
dbafedac MS |
469 | solen = sizeof(b.protocol); |
470 | if (getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &b.protocol, &solen) < 0) | |
01e10de3 LP |
471 | return false; |
472 | ||
dbafedac | 473 | if (b.protocol != a->protocol) |
01e10de3 LP |
474 | return false; |
475 | } | |
476 | ||
02233928 | 477 | return socket_address_equal(a, &b); |
01e10de3 LP |
478 | } |
479 | ||
3b1c5241 SL |
480 | int sockaddr_port(const struct sockaddr *_sa) { |
481 | union sockaddr_union *sa = (union sockaddr_union*) _sa; | |
482 | ||
483 | assert(sa); | |
484 | ||
485 | if (!IN_SET(sa->sa.sa_family, AF_INET, AF_INET6)) | |
486 | return -EAFNOSUPPORT; | |
487 | ||
488 | return ntohs(sa->sa.sa_family == AF_INET6 ? | |
489 | sa->in6.sin6_port : | |
490 | sa->in.sin_port); | |
491 | } | |
492 | ||
493 | int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret) { | |
4d49b48c | 494 | union sockaddr_union *sa = (union sockaddr_union*) _sa; |
8569a776 | 495 | char *p; |
fc25ad25 | 496 | int r; |
8569a776 | 497 | |
4d49b48c LP |
498 | assert(sa); |
499 | assert(salen >= sizeof(sa->sa.sa_family)); | |
8569a776 | 500 | |
4d49b48c | 501 | switch (sa->sa.sa_family) { |
8569a776 LP |
502 | |
503 | case AF_INET: { | |
504 | uint32_t a; | |
505 | ||
4d49b48c | 506 | a = ntohl(sa->in.sin_addr.s_addr); |
8569a776 | 507 | |
fc25ad25 ZJS |
508 | if (include_port) |
509 | r = asprintf(&p, | |
3b1c5241 SL |
510 | "%u.%u.%u.%u:%u", |
511 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, | |
fc25ad25 ZJS |
512 | ntohs(sa->in.sin_port)); |
513 | else | |
514 | r = asprintf(&p, | |
3b1c5241 | 515 | "%u.%u.%u.%u", |
fc25ad25 ZJS |
516 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF); |
517 | if (r < 0) | |
518 | return -ENOMEM; | |
8569a776 LP |
519 | break; |
520 | } | |
521 | ||
522 | case AF_INET6: { | |
523 | static const unsigned char ipv4_prefix[] = { | |
524 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF | |
525 | }; | |
526 | ||
fc25ad25 ZJS |
527 | if (translate_ipv6 && |
528 | memcmp(&sa->in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { | |
4d49b48c | 529 | const uint8_t *a = sa->in6.sin6_addr.s6_addr+12; |
fc25ad25 ZJS |
530 | if (include_port) |
531 | r = asprintf(&p, | |
3b1c5241 SL |
532 | "%u.%u.%u.%u:%u", |
533 | a[0], a[1], a[2], a[3], | |
fc25ad25 ZJS |
534 | ntohs(sa->in6.sin6_port)); |
535 | else | |
536 | r = asprintf(&p, | |
3b1c5241 | 537 | "%u.%u.%u.%u", |
fc25ad25 ZJS |
538 | a[0], a[1], a[2], a[3]); |
539 | if (r < 0) | |
540 | return -ENOMEM; | |
8569a776 LP |
541 | } else { |
542 | char a[INET6_ADDRSTRLEN]; | |
543 | ||
3b1c5241 SL |
544 | inet_ntop(AF_INET6, &sa->in6.sin6_addr, a, sizeof(a)); |
545 | ||
546 | if (include_port) { | |
fc25ad25 | 547 | r = asprintf(&p, |
3b1c5241 SL |
548 | "[%s]:%u", |
549 | a, | |
fc25ad25 ZJS |
550 | ntohs(sa->in6.sin6_port)); |
551 | if (r < 0) | |
3b1c5241 SL |
552 | return -ENOMEM; |
553 | } else { | |
554 | p = strdup(a); | |
555 | if (!p) | |
556 | return -ENOMEM; | |
557 | } | |
8569a776 LP |
558 | } |
559 | ||
560 | break; | |
561 | } | |
562 | ||
4d49b48c LP |
563 | case AF_UNIX: |
564 | if (salen <= offsetof(struct sockaddr_un, sun_path)) { | |
565 | p = strdup("<unnamed>"); | |
566 | if (!p) | |
567 | return -ENOMEM; | |
8569a776 | 568 | |
4d49b48c LP |
569 | } else if (sa->un.sun_path[0] == 0) { |
570 | /* abstract */ | |
8569a776 | 571 | |
4d49b48c LP |
572 | /* FIXME: We assume we can print the |
573 | * socket path here and that it hasn't | |
574 | * more than one NUL byte. That is | |
575 | * actually an invalid assumption */ | |
576 | ||
577 | p = new(char, sizeof(sa->un.sun_path)+1); | |
578 | if (!p) | |
579 | return -ENOMEM; | |
580 | ||
581 | p[0] = '@'; | |
582 | memcpy(p+1, sa->un.sun_path+1, sizeof(sa->un.sun_path)-1); | |
583 | p[sizeof(sa->un.sun_path)] = 0; | |
584 | ||
585 | } else { | |
586 | p = strndup(sa->un.sun_path, sizeof(sa->un.sun_path)); | |
0810bc56 | 587 | if (!p) |
4d49b48c LP |
588 | return -ENOMEM; |
589 | } | |
8569a776 LP |
590 | |
591 | break; | |
8569a776 LP |
592 | |
593 | default: | |
15411c0c | 594 | return -EOPNOTSUPP; |
8569a776 LP |
595 | } |
596 | ||
4d49b48c | 597 | |
8569a776 LP |
598 | *ret = p; |
599 | return 0; | |
600 | } | |
601 | ||
4d49b48c LP |
602 | int getpeername_pretty(int fd, char **ret) { |
603 | union sockaddr_union sa; | |
b31f535c | 604 | socklen_t salen = sizeof(sa); |
eff05270 | 605 | int r; |
4d49b48c LP |
606 | |
607 | assert(fd >= 0); | |
608 | assert(ret); | |
609 | ||
4d49b48c LP |
610 | if (getpeername(fd, &sa.sa, &salen) < 0) |
611 | return -errno; | |
612 | ||
613 | if (sa.sa.sa_family == AF_UNIX) { | |
39883f62 | 614 | struct ucred ucred = {}; |
4d49b48c LP |
615 | |
616 | /* UNIX connection sockets are anonymous, so let's use | |
617 | * PID/UID as pretty credentials instead */ | |
618 | ||
eff05270 LP |
619 | r = getpeercred(fd, &ucred); |
620 | if (r < 0) | |
621 | return r; | |
4d49b48c | 622 | |
de0671ee | 623 | if (asprintf(ret, "PID "PID_FMT"/UID "UID_FMT, ucred.pid, ucred.uid) < 0) |
4d49b48c LP |
624 | return -ENOMEM; |
625 | ||
626 | return 0; | |
627 | } | |
628 | ||
629 | /* For remote sockets we translate IPv6 addresses back to IPv4 | |
630 | * if applicable, since that's nicer. */ | |
631 | ||
3b1c5241 | 632 | return sockaddr_pretty(&sa.sa, salen, true, true, ret); |
4d49b48c LP |
633 | } |
634 | ||
635 | int getsockname_pretty(int fd, char **ret) { | |
636 | union sockaddr_union sa; | |
b31f535c | 637 | socklen_t salen = sizeof(sa); |
4d49b48c LP |
638 | |
639 | assert(fd >= 0); | |
640 | assert(ret); | |
641 | ||
4d49b48c LP |
642 | if (getsockname(fd, &sa.sa, &salen) < 0) |
643 | return -errno; | |
644 | ||
645 | /* For local sockets we do not translate IPv6 addresses back | |
646 | * to IPv6 if applicable, since this is usually used for | |
647 | * listening sockets where the difference between IPv4 and | |
648 | * IPv6 matters. */ | |
649 | ||
3b1c5241 | 650 | return sockaddr_pretty(&sa.sa, salen, false, true, ret); |
4d49b48c LP |
651 | } |
652 | ||
b31f535c ZJS |
653 | int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret) { |
654 | int r; | |
655 | char host[NI_MAXHOST], *ret; | |
656 | ||
657 | assert(_ret); | |
658 | ||
659 | r = getnameinfo(&sa->sa, salen, host, sizeof(host), NULL, 0, | |
660 | NI_IDN|NI_IDN_USE_STD3_ASCII_RULES); | |
661 | if (r != 0) { | |
b31f535c ZJS |
662 | int saved_errno = errno; |
663 | ||
3b1c5241 | 664 | r = sockaddr_pretty(&sa->sa, salen, true, true, &ret); |
f647962d | 665 | if (r < 0) |
1938ac51 | 666 | return r; |
b31f535c | 667 | |
279d3c9c | 668 | log_debug_errno(saved_errno, "getnameinfo(%s) failed: %m", ret); |
cb651834 ZJS |
669 | } else { |
670 | ret = strdup(host); | |
671 | if (!ret) | |
1938ac51 | 672 | return -ENOMEM; |
cb651834 | 673 | } |
b31f535c ZJS |
674 | |
675 | *_ret = ret; | |
676 | return 0; | |
677 | } | |
678 | ||
679 | int getnameinfo_pretty(int fd, char **ret) { | |
680 | union sockaddr_union sa; | |
681 | socklen_t salen = sizeof(sa); | |
682 | ||
683 | assert(fd >= 0); | |
684 | assert(ret); | |
685 | ||
4a62c710 | 686 | if (getsockname(fd, &sa.sa, &salen) < 0) |
1938ac51 | 687 | return -errno; |
b31f535c ZJS |
688 | |
689 | return socknameinfo_pretty(&sa, salen, ret); | |
690 | } | |
691 | ||
bd1fe7c7 LP |
692 | int socket_address_unlink(SocketAddress *a) { |
693 | assert(a); | |
694 | ||
695 | if (socket_address_family(a) != AF_UNIX) | |
696 | return 0; | |
697 | ||
698 | if (a->sockaddr.un.sun_path[0] == 0) | |
699 | return 0; | |
700 | ||
701 | if (unlink(a->sockaddr.un.sun_path) < 0) | |
702 | return -errno; | |
703 | ||
704 | return 1; | |
705 | } | |
706 | ||
7a22745a LP |
707 | static const char* const netlink_family_table[] = { |
708 | [NETLINK_ROUTE] = "route", | |
709 | [NETLINK_FIREWALL] = "firewall", | |
710 | [NETLINK_INET_DIAG] = "inet-diag", | |
711 | [NETLINK_NFLOG] = "nflog", | |
712 | [NETLINK_XFRM] = "xfrm", | |
713 | [NETLINK_SELINUX] = "selinux", | |
714 | [NETLINK_ISCSI] = "iscsi", | |
715 | [NETLINK_AUDIT] = "audit", | |
716 | [NETLINK_FIB_LOOKUP] = "fib-lookup", | |
717 | [NETLINK_CONNECTOR] = "connector", | |
718 | [NETLINK_NETFILTER] = "netfilter", | |
719 | [NETLINK_IP6_FW] = "ip6-fw", | |
720 | [NETLINK_DNRTMSG] = "dnrtmsg", | |
721 | [NETLINK_KOBJECT_UEVENT] = "kobject-uevent", | |
722 | [NETLINK_GENERIC] = "generic", | |
723 | [NETLINK_SCSITRANSPORT] = "scsitransport", | |
724 | [NETLINK_ECRYPTFS] = "ecryptfs" | |
725 | }; | |
726 | ||
f8b69d1d | 727 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(netlink_family, int, INT_MAX); |
7a22745a | 728 | |
c0120d99 LP |
729 | static const char* const socket_address_bind_ipv6_only_table[_SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX] = { |
730 | [SOCKET_ADDRESS_DEFAULT] = "default", | |
731 | [SOCKET_ADDRESS_BOTH] = "both", | |
732 | [SOCKET_ADDRESS_IPV6_ONLY] = "ipv6-only" | |
733 | }; | |
734 | ||
735 | DEFINE_STRING_TABLE_LOOKUP(socket_address_bind_ipv6_only, SocketAddressBindIPv6Only); | |
f01e5736 LP |
736 | |
737 | bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b) { | |
738 | assert(a); | |
739 | assert(b); | |
740 | ||
741 | if (a->sa.sa_family != b->sa.sa_family) | |
742 | return false; | |
743 | ||
744 | if (a->sa.sa_family == AF_INET) | |
745 | return a->in.sin_addr.s_addr == b->in.sin_addr.s_addr; | |
746 | ||
747 | if (a->sa.sa_family == AF_INET6) | |
748 | return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr)) == 0; | |
749 | ||
750 | return false; | |
751 | } | |
db73295a LP |
752 | |
753 | char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR_TO_STRING_MAX]) { | |
754 | assert(addr); | |
755 | assert(buffer); | |
756 | ||
757 | /* Like ether_ntoa() but uses %02x instead of %x to print | |
758 | * ethernet addresses, which makes them look less funny. Also, | |
759 | * doesn't use a static buffer. */ | |
760 | ||
761 | sprintf(buffer, "%02x:%02x:%02x:%02x:%02x:%02x", | |
762 | addr->ether_addr_octet[0], | |
763 | addr->ether_addr_octet[1], | |
764 | addr->ether_addr_octet[2], | |
765 | addr->ether_addr_octet[3], | |
766 | addr->ether_addr_octet[4], | |
767 | addr->ether_addr_octet[5]); | |
768 | ||
769 | return buffer; | |
770 | } |