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718e3744 | 1 | /* Socket union related function. |
2 | * Copyright (c) 1997, 98 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "prefix.h" | |
24 | #include "vty.h" | |
25 | #include "sockunion.h" | |
26 | #include "memory.h" | |
718e3744 | 27 | #include "log.h" |
7cb5cdbb | 28 | #include "jhash.h" |
174482ef | 29 | #include "lib_errors.h" |
718e3744 | 30 | |
4a1ab8e4 DL |
31 | DEFINE_MTYPE_STATIC(LIB, SOCKUNION, "Socket union") |
32 | ||
d62a17ae | 33 | const char *inet_sutop(const union sockunion *su, char *str) |
34 | { | |
35 | switch (su->sa.sa_family) { | |
36 | case AF_INET: | |
37 | inet_ntop(AF_INET, &su->sin.sin_addr, str, INET_ADDRSTRLEN); | |
38 | break; | |
39 | case AF_INET6: | |
40 | inet_ntop(AF_INET6, &su->sin6.sin6_addr, str, INET6_ADDRSTRLEN); | |
41 | break; | |
42 | } | |
43 | return str; | |
718e3744 | 44 | } |
45 | ||
d62a17ae | 46 | int str2sockunion(const char *str, union sockunion *su) |
718e3744 | 47 | { |
d62a17ae | 48 | int ret; |
718e3744 | 49 | |
d1f92e45 | 50 | if (str == NULL) |
51 | return -1; | |
52 | ||
d62a17ae | 53 | memset(su, 0, sizeof(union sockunion)); |
718e3744 | 54 | |
d62a17ae | 55 | ret = inet_pton(AF_INET, str, &su->sin.sin_addr); |
56 | if (ret > 0) /* Valid IPv4 address format. */ | |
57 | { | |
58 | su->sin.sin_family = AF_INET; | |
6f0e3f6e | 59 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 60 | su->sin.sin_len = sizeof(struct sockaddr_in); |
6f0e3f6e | 61 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
d62a17ae | 62 | return 0; |
63 | } | |
64 | ret = inet_pton(AF_INET6, str, &su->sin6.sin6_addr); | |
65 | if (ret > 0) /* Valid IPv6 address format. */ | |
66 | { | |
67 | su->sin6.sin6_family = AF_INET6; | |
718e3744 | 68 | #ifdef SIN6_LEN |
d62a17ae | 69 | su->sin6.sin6_len = sizeof(struct sockaddr_in6); |
718e3744 | 70 | #endif /* SIN6_LEN */ |
d62a17ae | 71 | return 0; |
72 | } | |
73 | return -1; | |
718e3744 | 74 | } |
75 | ||
d62a17ae | 76 | const char *sockunion2str(const union sockunion *su, char *buf, size_t len) |
718e3744 | 77 | { |
d62a17ae | 78 | switch (sockunion_family(su)) { |
79 | case AF_UNSPEC: | |
80 | snprintf(buf, len, "(unspec)"); | |
81 | return buf; | |
82 | case AF_INET: | |
83 | return inet_ntop(AF_INET, &su->sin.sin_addr, buf, len); | |
84 | case AF_INET6: | |
85 | return inet_ntop(AF_INET6, &su->sin6.sin6_addr, buf, len); | |
86 | } | |
87 | snprintf(buf, len, "(af %d)", sockunion_family(su)); | |
88 | return buf; | |
718e3744 | 89 | } |
90 | ||
d62a17ae | 91 | union sockunion *sockunion_str2su(const char *str) |
2fb2a455 | 92 | { |
d62a17ae | 93 | union sockunion *su = XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion)); |
94 | ||
95 | if (!str2sockunion(str, su)) | |
96 | return su; | |
97 | ||
98 | XFREE(MTYPE_SOCKUNION, su); | |
99 | return NULL; | |
2fb2a455 PJ |
100 | } |
101 | ||
1a7dcf42 | 102 | /* Convert IPv4 compatible IPv6 address to IPv4 address. */ |
d62a17ae | 103 | static void sockunion_normalise_mapped(union sockunion *su) |
104 | { | |
105 | struct sockaddr_in sin; | |
106 | ||
107 | if (su->sa.sa_family == AF_INET6 | |
108 | && IN6_IS_ADDR_V4MAPPED(&su->sin6.sin6_addr)) { | |
109 | memset(&sin, 0, sizeof(struct sockaddr_in)); | |
110 | sin.sin_family = AF_INET; | |
111 | sin.sin_port = su->sin6.sin6_port; | |
112 | memcpy(&sin.sin_addr, ((char *)&su->sin6.sin6_addr) + 12, 4); | |
113 | memcpy(su, &sin, sizeof(struct sockaddr_in)); | |
114 | } | |
1a7dcf42 PJ |
115 | } |
116 | ||
fc9707c3 | 117 | /* return sockunion structure : this function should be revised. */ |
d62a17ae | 118 | static const char *sockunion_log(const union sockunion *su, char *buf, |
119 | size_t len) | |
fc9707c3 | 120 | { |
d62a17ae | 121 | switch (su->sa.sa_family) { |
122 | case AF_INET: | |
123 | return inet_ntop(AF_INET, &su->sin.sin_addr, buf, len); | |
fc9707c3 | 124 | |
d62a17ae | 125 | case AF_INET6: |
126 | return inet_ntop(AF_INET6, &(su->sin6.sin6_addr), buf, len); | |
127 | break; | |
fc9707c3 | 128 | |
d62a17ae | 129 | default: |
130 | snprintf(buf, len, "af_unknown %d ", su->sa.sa_family); | |
131 | return buf; | |
132 | } | |
fc9707c3 DW |
133 | } |
134 | ||
718e3744 | 135 | /* Return socket of sockunion. */ |
d62a17ae | 136 | int sockunion_socket(const union sockunion *su) |
718e3744 | 137 | { |
d62a17ae | 138 | int sock; |
718e3744 | 139 | |
d62a17ae | 140 | sock = socket(su->sa.sa_family, SOCK_STREAM, 0); |
141 | if (sock < 0) { | |
142 | char buf[SU_ADDRSTRLEN]; | |
450971aa | 143 | flog_err(EC_LIB_SOCKET, "Can't make socket for %s : %s", |
1b5e2f89 DS |
144 | sockunion_log(su, buf, SU_ADDRSTRLEN), |
145 | safe_strerror(errno)); | |
d62a17ae | 146 | return -1; |
147 | } | |
718e3744 | 148 | |
d62a17ae | 149 | return sock; |
718e3744 | 150 | } |
151 | ||
152 | /* Return accepted new socket file descriptor. */ | |
d62a17ae | 153 | int sockunion_accept(int sock, union sockunion *su) |
718e3744 | 154 | { |
d62a17ae | 155 | socklen_t len; |
156 | int client_sock; | |
718e3744 | 157 | |
d62a17ae | 158 | len = sizeof(union sockunion); |
159 | client_sock = accept(sock, (struct sockaddr *)su, &len); | |
160 | ||
161 | sockunion_normalise_mapped(su); | |
162 | return client_sock; | |
718e3744 | 163 | } |
164 | ||
165 | /* Return sizeof union sockunion. */ | |
d62a17ae | 166 | static int sockunion_sizeof(const union sockunion *su) |
167 | { | |
168 | int ret; | |
169 | ||
170 | ret = 0; | |
171 | switch (su->sa.sa_family) { | |
172 | case AF_INET: | |
173 | ret = sizeof(struct sockaddr_in); | |
174 | break; | |
175 | case AF_INET6: | |
176 | ret = sizeof(struct sockaddr_in6); | |
177 | break; | |
178 | } | |
179 | return ret; | |
718e3744 | 180 | } |
181 | ||
b11b5772 | 182 | /* Performs a non-blocking connect(). */ |
d62a17ae | 183 | enum connect_result sockunion_connect(int fd, const union sockunion *peersu, |
184 | unsigned short port, ifindex_t ifindex) | |
185 | { | |
186 | int ret; | |
d62a17ae | 187 | union sockunion su; |
188 | ||
189 | memcpy(&su, peersu, sizeof(union sockunion)); | |
190 | ||
191 | switch (su.sa.sa_family) { | |
192 | case AF_INET: | |
193 | su.sin.sin_port = port; | |
194 | break; | |
195 | case AF_INET6: | |
196 | su.sin6.sin6_port = port; | |
718e3744 | 197 | #ifdef KAME |
d62a17ae | 198 | if (IN6_IS_ADDR_LINKLOCAL(&su.sin6.sin6_addr) && ifindex) { |
199 | su.sin6.sin6_scope_id = ifindex; | |
200 | SET_IN6_LINKLOCAL_IFINDEX(su.sin6.sin6_addr, ifindex); | |
201 | } | |
718e3744 | 202 | #endif /* KAME */ |
d62a17ae | 203 | break; |
204 | } | |
205 | ||
d62a17ae | 206 | /* Call connect function. */ |
207 | ret = connect(fd, (struct sockaddr *)&su, sockunion_sizeof(&su)); | |
208 | ||
209 | /* Immediate success */ | |
b11b5772 | 210 | if (ret == 0) |
d62a17ae | 211 | return connect_success; |
d62a17ae | 212 | |
213 | /* If connect is in progress then return 1 else it's real error. */ | |
214 | if (ret < 0) { | |
215 | if (errno != EINPROGRESS) { | |
216 | char str[SU_ADDRSTRLEN]; | |
217 | zlog_info("can't connect to %s fd %d : %s", | |
218 | sockunion_log(&su, str, sizeof str), fd, | |
219 | safe_strerror(errno)); | |
220 | return connect_error; | |
221 | } | |
718e3744 | 222 | } |
718e3744 | 223 | |
d62a17ae | 224 | return connect_in_progress; |
718e3744 | 225 | } |
226 | ||
227 | /* Make socket from sockunion union. */ | |
d62a17ae | 228 | int sockunion_stream_socket(union sockunion *su) |
718e3744 | 229 | { |
d62a17ae | 230 | int sock; |
718e3744 | 231 | |
d62a17ae | 232 | if (su->sa.sa_family == 0) |
233 | su->sa.sa_family = AF_INET_UNION; | |
718e3744 | 234 | |
d62a17ae | 235 | sock = socket(su->sa.sa_family, SOCK_STREAM, 0); |
718e3744 | 236 | |
d62a17ae | 237 | if (sock < 0) |
450971aa | 238 | flog_err(EC_LIB_SOCKET, |
1b5e2f89 | 239 | "can't make socket sockunion_stream_socket"); |
718e3744 | 240 | |
d62a17ae | 241 | return sock; |
718e3744 | 242 | } |
243 | ||
244 | /* Bind socket to specified address. */ | |
d62a17ae | 245 | int sockunion_bind(int sock, union sockunion *su, unsigned short port, |
246 | union sockunion *su_addr) | |
718e3744 | 247 | { |
d62a17ae | 248 | int size = 0; |
249 | int ret; | |
718e3744 | 250 | |
d62a17ae | 251 | if (su->sa.sa_family == AF_INET) { |
252 | size = sizeof(struct sockaddr_in); | |
253 | su->sin.sin_port = htons(port); | |
6f0e3f6e | 254 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 255 | su->sin.sin_len = size; |
6f0e3f6e | 256 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
d62a17ae | 257 | if (su_addr == NULL) |
258 | sockunion2ip(su) = htonl(INADDR_ANY); | |
259 | } else if (su->sa.sa_family == AF_INET6) { | |
260 | size = sizeof(struct sockaddr_in6); | |
261 | su->sin6.sin6_port = htons(port); | |
718e3744 | 262 | #ifdef SIN6_LEN |
d62a17ae | 263 | su->sin6.sin6_len = size; |
718e3744 | 264 | #endif /* SIN6_LEN */ |
d62a17ae | 265 | if (su_addr == NULL) { |
1cbb5dfc | 266 | #ifdef LINUX_IPV6 |
d62a17ae | 267 | memset(&su->sin6.sin6_addr, 0, sizeof(struct in6_addr)); |
718e3744 | 268 | #else |
d62a17ae | 269 | su->sin6.sin6_addr = in6addr_any; |
718e3744 | 270 | #endif /* LINUX_IPV6 */ |
d62a17ae | 271 | } |
718e3744 | 272 | } |
718e3744 | 273 | |
d62a17ae | 274 | ret = bind(sock, (struct sockaddr *)su, size); |
275 | if (ret < 0) { | |
276 | char buf[SU_ADDRSTRLEN]; | |
450971aa | 277 | flog_err(EC_LIB_SOCKET, "can't bind socket for %s : %s", |
1b5e2f89 DS |
278 | sockunion_log(su, buf, SU_ADDRSTRLEN), |
279 | safe_strerror(errno)); | |
d62a17ae | 280 | } |
718e3744 | 281 | |
d62a17ae | 282 | return ret; |
718e3744 | 283 | } |
284 | ||
d62a17ae | 285 | int sockopt_reuseaddr(int sock) |
718e3744 | 286 | { |
d62a17ae | 287 | int ret; |
288 | int on = 1; | |
718e3744 | 289 | |
d62a17ae | 290 | ret = setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *)&on, |
291 | sizeof(on)); | |
292 | if (ret < 0) { | |
450971aa | 293 | flog_err(EC_LIB_SOCKET, |
1b5e2f89 | 294 | "can't set sockopt SO_REUSEADDR to socket %d", sock); |
d62a17ae | 295 | return -1; |
296 | } | |
297 | return 0; | |
718e3744 | 298 | } |
299 | ||
300 | #ifdef SO_REUSEPORT | |
d62a17ae | 301 | int sockopt_reuseport(int sock) |
718e3744 | 302 | { |
d62a17ae | 303 | int ret; |
304 | int on = 1; | |
718e3744 | 305 | |
d62a17ae | 306 | ret = setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, (void *)&on, |
307 | sizeof(on)); | |
308 | if (ret < 0) { | |
450971aa | 309 | flog_err(EC_LIB_SOCKET, |
1b5e2f89 | 310 | "can't set sockopt SO_REUSEPORT to socket %d", sock); |
d62a17ae | 311 | return -1; |
312 | } | |
313 | return 0; | |
718e3744 | 314 | } |
315 | #else | |
d62a17ae | 316 | int sockopt_reuseport(int sock) |
718e3744 | 317 | { |
d62a17ae | 318 | return 0; |
718e3744 | 319 | } |
320 | #endif /* 0 */ | |
321 | ||
d62a17ae | 322 | int sockopt_ttl(int family, int sock, int ttl) |
718e3744 | 323 | { |
d62a17ae | 324 | int ret; |
718e3744 | 325 | |
326 | #ifdef IP_TTL | |
d62a17ae | 327 | if (family == AF_INET) { |
328 | ret = setsockopt(sock, IPPROTO_IP, IP_TTL, (void *)&ttl, | |
329 | sizeof(int)); | |
330 | if (ret < 0) { | |
450971aa | 331 | flog_err(EC_LIB_SOCKET, |
1b5e2f89 | 332 | "can't set sockopt IP_TTL %d to socket %d", |
ade6974d | 333 | ttl, sock); |
d62a17ae | 334 | return -1; |
335 | } | |
336 | return 0; | |
718e3744 | 337 | } |
718e3744 | 338 | #endif /* IP_TTL */ |
d62a17ae | 339 | if (family == AF_INET6) { |
340 | ret = setsockopt(sock, IPPROTO_IPV6, IPV6_UNICAST_HOPS, | |
341 | (void *)&ttl, sizeof(int)); | |
342 | if (ret < 0) { | |
ade6974d | 343 | flog_err( |
450971aa | 344 | EC_LIB_SOCKET, |
ade6974d QY |
345 | "can't set sockopt IPV6_UNICAST_HOPS %d to socket %d", |
346 | ttl, sock); | |
d62a17ae | 347 | return -1; |
348 | } | |
349 | return 0; | |
718e3744 | 350 | } |
d62a17ae | 351 | return 0; |
718e3744 | 352 | } |
353 | ||
c62232b4 DS |
354 | /* |
355 | * This function called setsockopt(.., TCP_CORK,...) | |
356 | * Which on linux is a no-op since it is enabled by | |
357 | * default and on BSD it uses TCP_NOPUSH to do | |
358 | * the same thing( which it was not configured to | |
0437e105 | 359 | * use). This cleanup of the api occurred on 8/1/17 |
c62232b4 DS |
360 | * I imagine if after more than 1 year of no-one |
361 | * complaining, and a major upgrade release we | |
362 | * can deprecate and remove this function call | |
363 | */ | |
d62a17ae | 364 | int sockopt_cork(int sock, int onoff) |
58192df7 | 365 | { |
d62a17ae | 366 | return 0; |
ed40466a DS |
367 | } |
368 | ||
369 | int sockopt_mark_default(int sock, int mark, struct zebra_privs_t *cap) | |
370 | { | |
371 | #ifdef SO_MARK | |
d62a17ae | 372 | int ret; |
ed40466a | 373 | |
6bb30c2c DL |
374 | frr_elevate_privs(cap) { |
375 | ret = setsockopt(sock, SOL_SOCKET, SO_MARK, &mark, | |
376 | sizeof(mark)); | |
377 | } | |
d62a17ae | 378 | return ret; |
ed40466a | 379 | #else |
d62a17ae | 380 | return 0; |
58192df7 SH |
381 | #endif |
382 | } | |
383 | ||
d62a17ae | 384 | int sockopt_minttl(int family, int sock, int minttl) |
fa411a21 | 385 | { |
89b6d1f8 | 386 | #ifdef IP_MINTTL |
d62a17ae | 387 | if (family == AF_INET) { |
388 | int ret = setsockopt(sock, IPPROTO_IP, IP_MINTTL, &minttl, | |
389 | sizeof(minttl)); | |
390 | if (ret < 0) | |
ade6974d | 391 | flog_err( |
450971aa | 392 | EC_LIB_SOCKET, |
ade6974d QY |
393 | "can't set sockopt IP_MINTTL to %d on socket %d: %s", |
394 | minttl, sock, safe_strerror(errno)); | |
d62a17ae | 395 | return ret; |
396 | } | |
d876bdf4 | 397 | #endif /* IP_MINTTL */ |
d8dc5257 | 398 | #ifdef IPV6_MINHOPCOUNT |
d62a17ae | 399 | if (family == AF_INET6) { |
400 | int ret = setsockopt(sock, IPPROTO_IPV6, IPV6_MINHOPCOUNT, | |
401 | &minttl, sizeof(minttl)); | |
402 | if (ret < 0) | |
ade6974d | 403 | flog_err( |
450971aa | 404 | EC_LIB_SOCKET, |
ade6974d QY |
405 | "can't set sockopt IPV6_MINHOPCOUNT to %d on socket %d: %s", |
406 | minttl, sock, safe_strerror(errno)); | |
d62a17ae | 407 | return ret; |
408 | } | |
d876bdf4 | 409 | #endif |
fa411a21 | 410 | |
d62a17ae | 411 | errno = EOPNOTSUPP; |
412 | return -1; | |
fa411a21 NH |
413 | } |
414 | ||
d62a17ae | 415 | int sockopt_v6only(int family, int sock) |
ca051269 | 416 | { |
d62a17ae | 417 | int ret, on = 1; |
ca051269 | 418 | |
ca051269 | 419 | #ifdef IPV6_V6ONLY |
d62a17ae | 420 | if (family == AF_INET6) { |
421 | ret = setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&on, | |
422 | sizeof(int)); | |
423 | if (ret < 0) { | |
450971aa | 424 | flog_err(EC_LIB_SOCKET, |
1b5e2f89 DS |
425 | "can't set sockopt IPV6_V6ONLY " |
426 | "to socket %d", | |
427 | sock); | |
d62a17ae | 428 | return -1; |
429 | } | |
430 | return 0; | |
ca051269 | 431 | } |
ca051269 | 432 | #endif /* IPV6_V6ONLY */ |
d62a17ae | 433 | return 0; |
ca051269 DL |
434 | } |
435 | ||
718e3744 | 436 | /* If same family and same prefix return 1. */ |
d62a17ae | 437 | int sockunion_same(const union sockunion *su1, const union sockunion *su2) |
438 | { | |
439 | int ret = 0; | |
440 | ||
441 | if (su1->sa.sa_family != su2->sa.sa_family) | |
442 | return 0; | |
443 | ||
444 | switch (su1->sa.sa_family) { | |
445 | case AF_INET: | |
446 | ret = memcmp(&su1->sin.sin_addr, &su2->sin.sin_addr, | |
447 | sizeof(struct in_addr)); | |
448 | break; | |
449 | case AF_INET6: | |
450 | ret = memcmp(&su1->sin6.sin6_addr, &su2->sin6.sin6_addr, | |
451 | sizeof(struct in6_addr)); | |
452 | if ((ret == 0) && IN6_IS_ADDR_LINKLOCAL(&su1->sin6.sin6_addr)) { | |
453 | /* compare interface indices */ | |
454 | if (su1->sin6.sin6_scope_id && su2->sin6.sin6_scope_id) | |
455 | ret = (su1->sin6.sin6_scope_id | |
456 | == su2->sin6.sin6_scope_id) | |
457 | ? 0 | |
458 | : 1; | |
459 | } | |
460 | break; | |
f2345335 | 461 | } |
d62a17ae | 462 | if (ret == 0) |
463 | return 1; | |
464 | else | |
465 | return 0; | |
718e3744 | 466 | } |
467 | ||
d62a17ae | 468 | unsigned int sockunion_hash(const union sockunion *su) |
7cb5cdbb | 469 | { |
d62a17ae | 470 | switch (sockunion_family(su)) { |
471 | case AF_INET: | |
472 | return jhash_1word(su->sin.sin_addr.s_addr, 0); | |
473 | case AF_INET6: | |
474 | return jhash2(su->sin6.sin6_addr.s6_addr32, | |
7e3a1ec7 | 475 | array_size(su->sin6.sin6_addr.s6_addr32), 0); |
d62a17ae | 476 | } |
477 | return 0; | |
7cb5cdbb TT |
478 | } |
479 | ||
d62a17ae | 480 | size_t family2addrsize(int family) |
95e0999c | 481 | { |
d62a17ae | 482 | switch (family) { |
483 | case AF_INET: | |
484 | return sizeof(struct in_addr); | |
485 | case AF_INET6: | |
486 | return sizeof(struct in6_addr); | |
487 | } | |
488 | return 0; | |
95e0999c TT |
489 | } |
490 | ||
d62a17ae | 491 | size_t sockunion_get_addrlen(const union sockunion *su) |
95e0999c | 492 | { |
d62a17ae | 493 | return family2addrsize(sockunion_family(su)); |
95e0999c TT |
494 | } |
495 | ||
d7c0a89a | 496 | const uint8_t *sockunion_get_addr(const union sockunion *su) |
95e0999c | 497 | { |
d62a17ae | 498 | switch (sockunion_family(su)) { |
499 | case AF_INET: | |
d7c0a89a | 500 | return (const uint8_t *)&su->sin.sin_addr.s_addr; |
d62a17ae | 501 | case AF_INET6: |
d7c0a89a | 502 | return (const uint8_t *)&su->sin6.sin6_addr; |
d62a17ae | 503 | } |
504 | return NULL; | |
95e0999c TT |
505 | } |
506 | ||
d7c0a89a | 507 | void sockunion_set(union sockunion *su, int family, const uint8_t *addr, |
d62a17ae | 508 | size_t bytes) |
95e0999c | 509 | { |
d62a17ae | 510 | if (family2addrsize(family) != bytes) |
511 | return; | |
95e0999c | 512 | |
d62a17ae | 513 | sockunion_family(su) = family; |
514 | switch (family) { | |
515 | case AF_INET: | |
516 | memcpy(&su->sin.sin_addr.s_addr, addr, bytes); | |
517 | break; | |
518 | case AF_INET6: | |
519 | memcpy(&su->sin6.sin6_addr, addr, bytes); | |
520 | break; | |
521 | } | |
95e0999c TT |
522 | } |
523 | ||
718e3744 | 524 | /* After TCP connection is established. Get local address and port. */ |
d62a17ae | 525 | union sockunion *sockunion_getsockname(int fd) |
526 | { | |
527 | int ret; | |
528 | socklen_t len; | |
529 | union { | |
530 | struct sockaddr sa; | |
531 | struct sockaddr_in sin; | |
532 | struct sockaddr_in6 sin6; | |
533 | char tmp_buffer[128]; | |
534 | } name; | |
535 | union sockunion *su; | |
536 | ||
537 | memset(&name, 0, sizeof name); | |
538 | len = sizeof name; | |
539 | ||
540 | ret = getsockname(fd, (struct sockaddr *)&name, &len); | |
541 | if (ret < 0) { | |
450971aa | 542 | flog_err(EC_LIB_SOCKET, |
1b5e2f89 DS |
543 | "Can't get local address and port by getsockname: %s", |
544 | safe_strerror(errno)); | |
d62a17ae | 545 | return NULL; |
546 | } | |
547 | ||
548 | if (name.sa.sa_family == AF_INET) { | |
549 | su = XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion)); | |
550 | memcpy(su, &name, sizeof(struct sockaddr_in)); | |
551 | return su; | |
552 | } | |
553 | if (name.sa.sa_family == AF_INET6) { | |
554 | su = XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion)); | |
555 | memcpy(su, &name, sizeof(struct sockaddr_in6)); | |
556 | sockunion_normalise_mapped(su); | |
557 | return su; | |
558 | } | |
559 | return NULL; | |
718e3744 | 560 | } |
561 | ||
562 | /* After TCP connection is established. Get remote address and port. */ | |
d62a17ae | 563 | union sockunion *sockunion_getpeername(int fd) |
564 | { | |
565 | int ret; | |
566 | socklen_t len; | |
567 | union { | |
568 | struct sockaddr sa; | |
569 | struct sockaddr_in sin; | |
570 | struct sockaddr_in6 sin6; | |
571 | char tmp_buffer[128]; | |
572 | } name; | |
573 | union sockunion *su; | |
574 | ||
575 | memset(&name, 0, sizeof name); | |
576 | len = sizeof name; | |
577 | ret = getpeername(fd, (struct sockaddr *)&name, &len); | |
578 | if (ret < 0) { | |
1c50c1c0 | 579 | flog_err(EC_LIB_SOCKET, "Can't get remote address and port: %s", |
1b5e2f89 | 580 | safe_strerror(errno)); |
d62a17ae | 581 | return NULL; |
582 | } | |
583 | ||
584 | if (name.sa.sa_family == AF_INET) { | |
585 | su = XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion)); | |
586 | memcpy(su, &name, sizeof(struct sockaddr_in)); | |
587 | return su; | |
588 | } | |
589 | if (name.sa.sa_family == AF_INET6) { | |
590 | su = XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion)); | |
591 | memcpy(su, &name, sizeof(struct sockaddr_in6)); | |
592 | sockunion_normalise_mapped(su); | |
593 | return su; | |
594 | } | |
595 | return NULL; | |
718e3744 | 596 | } |
597 | ||
598 | /* Print sockunion structure */ | |
d62a17ae | 599 | static void __attribute__((unused)) sockunion_print(const union sockunion *su) |
600 | { | |
601 | if (su == NULL) | |
602 | return; | |
603 | ||
604 | switch (su->sa.sa_family) { | |
605 | case AF_INET: | |
606 | printf("%s\n", inet_ntoa(su->sin.sin_addr)); | |
607 | break; | |
608 | case AF_INET6: { | |
609 | char buf[SU_ADDRSTRLEN]; | |
610 | ||
611 | printf("%s\n", inet_ntop(AF_INET6, &(su->sin6.sin6_addr), buf, | |
612 | sizeof(buf))); | |
613 | } break; | |
718e3744 | 614 | |
615 | #ifdef AF_LINK | |
d62a17ae | 616 | case AF_LINK: { |
617 | struct sockaddr_dl *sdl; | |
618 | ||
619 | sdl = (struct sockaddr_dl *)&(su->sa); | |
620 | printf("link#%d\n", sdl->sdl_index); | |
621 | } break; | |
718e3744 | 622 | #endif /* AF_LINK */ |
d62a17ae | 623 | default: |
624 | printf("af_unknown %d\n", su->sa.sa_family); | |
625 | break; | |
626 | } | |
718e3744 | 627 | } |
628 | ||
d62a17ae | 629 | static int in6addr_cmp(const struct in6_addr *addr1, |
630 | const struct in6_addr *addr2) | |
718e3744 | 631 | { |
d62a17ae | 632 | unsigned int i; |
d7c0a89a | 633 | const uint8_t *p1, *p2; |
718e3744 | 634 | |
d7c0a89a QY |
635 | p1 = (const uint8_t *)addr1; |
636 | p2 = (const uint8_t *)addr2; | |
718e3744 | 637 | |
d62a17ae | 638 | for (i = 0; i < sizeof(struct in6_addr); i++) { |
639 | if (p1[i] > p2[i]) | |
640 | return 1; | |
641 | else if (p1[i] < p2[i]) | |
642 | return -1; | |
643 | } | |
644 | return 0; | |
718e3744 | 645 | } |
718e3744 | 646 | |
d62a17ae | 647 | int sockunion_cmp(const union sockunion *su1, const union sockunion *su2) |
718e3744 | 648 | { |
d62a17ae | 649 | if (su1->sa.sa_family > su2->sa.sa_family) |
650 | return 1; | |
651 | if (su1->sa.sa_family < su2->sa.sa_family) | |
652 | return -1; | |
718e3744 | 653 | |
d62a17ae | 654 | if (su1->sa.sa_family == AF_INET) { |
655 | if (ntohl(sockunion2ip(su1)) == ntohl(sockunion2ip(su2))) | |
656 | return 0; | |
657 | if (ntohl(sockunion2ip(su1)) > ntohl(sockunion2ip(su2))) | |
658 | return 1; | |
659 | else | |
660 | return -1; | |
661 | } | |
662 | if (su1->sa.sa_family == AF_INET6) | |
663 | return in6addr_cmp(&su1->sin6.sin6_addr, &su2->sin6.sin6_addr); | |
718e3744 | 664 | return 0; |
718e3744 | 665 | } |
666 | ||
667 | /* Duplicate sockunion. */ | |
d62a17ae | 668 | union sockunion *sockunion_dup(const union sockunion *su) |
718e3744 | 669 | { |
d62a17ae | 670 | union sockunion *dup = |
671 | XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion)); | |
672 | memcpy(dup, su, sizeof(union sockunion)); | |
673 | return dup; | |
718e3744 | 674 | } |
675 | ||
d62a17ae | 676 | void sockunion_free(union sockunion *su) |
718e3744 | 677 | { |
d62a17ae | 678 | XFREE(MTYPE_SOCKUNION, su); |
718e3744 | 679 | } |
dd793e4a | 680 | |
d62a17ae | 681 | void sockunion_init(union sockunion *su) |
dd793e4a | 682 | { |
d62a17ae | 683 | memset(su, 0, sizeof(union sockunion)); |
dd793e4a | 684 | } |