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1 /* Socket union related function.
2 * Copyright (c) 1997, 98 Kunihiro Ishiguro
4 * This file is part of GNU Zebra.
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
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.
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
25 #include "sockunion.h"
30 DEFINE_MTYPE_STATIC(LIB
, SOCKUNION
, "Socket union")
32 const char *inet_sutop(const union sockunion
*su
, char *str
)
34 switch (su
->sa
.sa_family
) {
36 inet_ntop(AF_INET
, &su
->sin
.sin_addr
, str
, INET_ADDRSTRLEN
);
39 inet_ntop(AF_INET6
, &su
->sin6
.sin6_addr
, str
, INET6_ADDRSTRLEN
);
45 int str2sockunion(const char *str
, union sockunion
*su
)
52 memset(su
, 0, sizeof(union sockunion
));
54 ret
= inet_pton(AF_INET
, str
, &su
->sin
.sin_addr
);
55 if (ret
> 0) /* Valid IPv4 address format. */
57 su
->sin
.sin_family
= AF_INET
;
58 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
59 su
->sin
.sin_len
= sizeof(struct sockaddr_in
);
60 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
63 ret
= inet_pton(AF_INET6
, str
, &su
->sin6
.sin6_addr
);
64 if (ret
> 0) /* Valid IPv6 address format. */
66 su
->sin6
.sin6_family
= AF_INET6
;
68 su
->sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
75 const char *sockunion2str(const union sockunion
*su
, char *buf
, size_t len
)
77 switch (sockunion_family(su
)) {
79 snprintf(buf
, len
, "(unspec)");
82 return inet_ntop(AF_INET
, &su
->sin
.sin_addr
, buf
, len
);
84 return inet_ntop(AF_INET6
, &su
->sin6
.sin6_addr
, buf
, len
);
86 snprintf(buf
, len
, "(af %d)", sockunion_family(su
));
90 union sockunion
*sockunion_str2su(const char *str
)
92 union sockunion
*su
= XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
94 if (!str2sockunion(str
, su
))
97 XFREE(MTYPE_SOCKUNION
, su
);
101 /* Convert IPv4 compatible IPv6 address to IPv4 address. */
102 static void sockunion_normalise_mapped(union sockunion
*su
)
104 struct sockaddr_in sin
;
106 if (su
->sa
.sa_family
== AF_INET6
107 && IN6_IS_ADDR_V4MAPPED(&su
->sin6
.sin6_addr
)) {
108 memset(&sin
, 0, sizeof(struct sockaddr_in
));
109 sin
.sin_family
= AF_INET
;
110 sin
.sin_port
= su
->sin6
.sin6_port
;
111 memcpy(&sin
.sin_addr
, ((char *)&su
->sin6
.sin6_addr
) + 12, 4);
112 memcpy(su
, &sin
, sizeof(struct sockaddr_in
));
116 /* return sockunion structure : this function should be revised. */
117 static const char *sockunion_log(const union sockunion
*su
, char *buf
,
120 switch (su
->sa
.sa_family
) {
122 return inet_ntop(AF_INET
, &su
->sin
.sin_addr
, buf
, len
);
125 return inet_ntop(AF_INET6
, &(su
->sin6
.sin6_addr
), buf
, len
);
129 snprintf(buf
, len
, "af_unknown %d ", su
->sa
.sa_family
);
134 /* Return socket of sockunion. */
135 int sockunion_socket(const union sockunion
*su
)
139 sock
= socket(su
->sa
.sa_family
, SOCK_STREAM
, 0);
141 char buf
[SU_ADDRSTRLEN
];
142 zlog_warn("Can't make socket for %s : %s",
143 sockunion_log(su
, buf
, SU_ADDRSTRLEN
),
144 safe_strerror(errno
));
151 /* Return accepted new socket file descriptor. */
152 int sockunion_accept(int sock
, union sockunion
*su
)
157 len
= sizeof(union sockunion
);
158 client_sock
= accept(sock
, (struct sockaddr
*)su
, &len
);
160 sockunion_normalise_mapped(su
);
164 /* Return sizeof union sockunion. */
165 static int sockunion_sizeof(const union sockunion
*su
)
170 switch (su
->sa
.sa_family
) {
172 ret
= sizeof(struct sockaddr_in
);
175 ret
= sizeof(struct sockaddr_in6
);
181 /* Performs a non-blocking connect(). */
182 enum connect_result
sockunion_connect(int fd
, const union sockunion
*peersu
,
183 unsigned short port
, ifindex_t ifindex
)
188 memcpy(&su
, peersu
, sizeof(union sockunion
));
190 switch (su
.sa
.sa_family
) {
192 su
.sin
.sin_port
= port
;
195 su
.sin6
.sin6_port
= port
;
197 if (IN6_IS_ADDR_LINKLOCAL(&su
.sin6
.sin6_addr
) && ifindex
) {
198 su
.sin6
.sin6_scope_id
= ifindex
;
199 SET_IN6_LINKLOCAL_IFINDEX(su
.sin6
.sin6_addr
, ifindex
);
205 /* Call connect function. */
206 ret
= connect(fd
, (struct sockaddr
*)&su
, sockunion_sizeof(&su
));
208 /* Immediate success */
210 return connect_success
;
212 /* If connect is in progress then return 1 else it's real error. */
214 if (errno
!= EINPROGRESS
) {
215 char str
[SU_ADDRSTRLEN
];
216 zlog_info("can't connect to %s fd %d : %s",
217 sockunion_log(&su
, str
, sizeof str
), fd
,
218 safe_strerror(errno
));
219 return connect_error
;
223 return connect_in_progress
;
226 /* Make socket from sockunion union. */
227 int sockunion_stream_socket(union sockunion
*su
)
231 if (su
->sa
.sa_family
== 0)
232 su
->sa
.sa_family
= AF_INET_UNION
;
234 sock
= socket(su
->sa
.sa_family
, SOCK_STREAM
, 0);
237 zlog_warn("can't make socket sockunion_stream_socket");
242 /* Bind socket to specified address. */
243 int sockunion_bind(int sock
, union sockunion
*su
, unsigned short port
,
244 union sockunion
*su_addr
)
249 if (su
->sa
.sa_family
== AF_INET
) {
250 size
= sizeof(struct sockaddr_in
);
251 su
->sin
.sin_port
= htons(port
);
252 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
253 su
->sin
.sin_len
= size
;
254 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
256 sockunion2ip(su
) = htonl(INADDR_ANY
);
257 } else if (su
->sa
.sa_family
== AF_INET6
) {
258 size
= sizeof(struct sockaddr_in6
);
259 su
->sin6
.sin6_port
= htons(port
);
261 su
->sin6
.sin6_len
= size
;
262 #endif /* SIN6_LEN */
263 if (su_addr
== NULL
) {
265 memset(&su
->sin6
.sin6_addr
, 0, sizeof(struct in6_addr
));
267 su
->sin6
.sin6_addr
= in6addr_any
;
268 #endif /* LINUX_IPV6 */
272 ret
= bind(sock
, (struct sockaddr
*)su
, size
);
274 char buf
[SU_ADDRSTRLEN
];
275 zlog_warn("can't bind socket for %s : %s",
276 sockunion_log(su
, buf
, SU_ADDRSTRLEN
),
277 safe_strerror(errno
));
283 int sockopt_reuseaddr(int sock
)
288 ret
= setsockopt(sock
, SOL_SOCKET
, SO_REUSEADDR
, (void *)&on
,
291 zlog_warn("can't set sockopt SO_REUSEADDR to socket %d", sock
);
298 int sockopt_reuseport(int sock
)
303 ret
= setsockopt(sock
, SOL_SOCKET
, SO_REUSEPORT
, (void *)&on
,
306 zlog_warn("can't set sockopt SO_REUSEPORT to socket %d", sock
);
312 int sockopt_reuseport(int sock
)
318 int sockopt_ttl(int family
, int sock
, int ttl
)
323 if (family
== AF_INET
) {
324 ret
= setsockopt(sock
, IPPROTO_IP
, IP_TTL
, (void *)&ttl
,
327 zlog_warn("can't set sockopt IP_TTL %d to socket %d",
334 if (family
== AF_INET6
) {
335 ret
= setsockopt(sock
, IPPROTO_IPV6
, IPV6_UNICAST_HOPS
,
336 (void *)&ttl
, sizeof(int));
339 "can't set sockopt IPV6_UNICAST_HOPS %d to socket %d",
349 * This function called setsockopt(.., TCP_CORK,...)
350 * Which on linux is a no-op since it is enabled by
351 * default and on BSD it uses TCP_NOPUSH to do
352 * the same thing( which it was not configured to
353 * use). This cleanup of the api occured on 8/1/17
354 * I imagine if after more than 1 year of no-one
355 * complaining, and a major upgrade release we
356 * can deprecate and remove this function call
358 int sockopt_cork(int sock
, int onoff
)
363 int sockopt_mark_default(int sock
, int mark
, struct zebra_privs_t
*cap
)
368 if (cap
->change(ZPRIVS_RAISE
))
369 zlog_err("routing_socket: Can't raise privileges");
371 ret
= setsockopt(sock
, SOL_SOCKET
, SO_MARK
, &mark
, sizeof(mark
));
373 if (cap
->change(ZPRIVS_LOWER
))
374 zlog_err("routing_socket: Can't lower privileges");
382 int sockopt_minttl(int family
, int sock
, int minttl
)
385 if (family
== AF_INET
) {
386 int ret
= setsockopt(sock
, IPPROTO_IP
, IP_MINTTL
, &minttl
,
390 "can't set sockopt IP_MINTTL to %d on socket %d: %s",
391 minttl
, sock
, safe_strerror(errno
));
394 #endif /* IP_MINTTL */
395 #ifdef IPV6_MINHOPCOUNT
396 if (family
== AF_INET6
) {
397 int ret
= setsockopt(sock
, IPPROTO_IPV6
, IPV6_MINHOPCOUNT
,
398 &minttl
, sizeof(minttl
));
401 "can't set sockopt IPV6_MINHOPCOUNT to %d on socket %d: %s",
402 minttl
, sock
, safe_strerror(errno
));
411 int sockopt_v6only(int family
, int sock
)
416 if (family
== AF_INET6
) {
417 ret
= setsockopt(sock
, IPPROTO_IPV6
, IPV6_V6ONLY
, (void *)&on
,
421 "can't set sockopt IPV6_V6ONLY "
428 #endif /* IPV6_V6ONLY */
432 /* If same family and same prefix return 1. */
433 int sockunion_same(const union sockunion
*su1
, const union sockunion
*su2
)
437 if (su1
->sa
.sa_family
!= su2
->sa
.sa_family
)
440 switch (su1
->sa
.sa_family
) {
442 ret
= memcmp(&su1
->sin
.sin_addr
, &su2
->sin
.sin_addr
,
443 sizeof(struct in_addr
));
446 ret
= memcmp(&su1
->sin6
.sin6_addr
, &su2
->sin6
.sin6_addr
,
447 sizeof(struct in6_addr
));
448 if ((ret
== 0) && IN6_IS_ADDR_LINKLOCAL(&su1
->sin6
.sin6_addr
)) {
449 /* compare interface indices */
450 if (su1
->sin6
.sin6_scope_id
&& su2
->sin6
.sin6_scope_id
)
451 ret
= (su1
->sin6
.sin6_scope_id
452 == su2
->sin6
.sin6_scope_id
)
464 unsigned int sockunion_hash(const union sockunion
*su
)
466 switch (sockunion_family(su
)) {
468 return jhash_1word(su
->sin
.sin_addr
.s_addr
, 0);
470 return jhash2(su
->sin6
.sin6_addr
.s6_addr32
,
471 ZEBRA_NUM_OF(su
->sin6
.sin6_addr
.s6_addr32
), 0);
476 size_t family2addrsize(int family
)
480 return sizeof(struct in_addr
);
482 return sizeof(struct in6_addr
);
487 size_t sockunion_get_addrlen(const union sockunion
*su
)
489 return family2addrsize(sockunion_family(su
));
492 const uint8_t *sockunion_get_addr(const union sockunion
*su
)
494 switch (sockunion_family(su
)) {
496 return (const uint8_t *)&su
->sin
.sin_addr
.s_addr
;
498 return (const uint8_t *)&su
->sin6
.sin6_addr
;
503 void sockunion_set(union sockunion
*su
, int family
, const uint8_t *addr
,
506 if (family2addrsize(family
) != bytes
)
509 sockunion_family(su
) = family
;
512 memcpy(&su
->sin
.sin_addr
.s_addr
, addr
, bytes
);
515 memcpy(&su
->sin6
.sin6_addr
, addr
, bytes
);
520 /* After TCP connection is established. Get local address and port. */
521 union sockunion
*sockunion_getsockname(int fd
)
527 struct sockaddr_in sin
;
528 struct sockaddr_in6 sin6
;
529 char tmp_buffer
[128];
533 memset(&name
, 0, sizeof name
);
536 ret
= getsockname(fd
, (struct sockaddr
*)&name
, &len
);
538 zlog_warn("Can't get local address and port by getsockname: %s",
539 safe_strerror(errno
));
543 if (name
.sa
.sa_family
== AF_INET
) {
544 su
= XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
545 memcpy(su
, &name
, sizeof(struct sockaddr_in
));
548 if (name
.sa
.sa_family
== AF_INET6
) {
549 su
= XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
550 memcpy(su
, &name
, sizeof(struct sockaddr_in6
));
551 sockunion_normalise_mapped(su
);
557 /* After TCP connection is established. Get remote address and port. */
558 union sockunion
*sockunion_getpeername(int fd
)
564 struct sockaddr_in sin
;
565 struct sockaddr_in6 sin6
;
566 char tmp_buffer
[128];
570 memset(&name
, 0, sizeof name
);
572 ret
= getpeername(fd
, (struct sockaddr
*)&name
, &len
);
574 zlog_warn("Can't get remote address and port: %s",
575 safe_strerror(errno
));
579 if (name
.sa
.sa_family
== AF_INET
) {
580 su
= XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
581 memcpy(su
, &name
, sizeof(struct sockaddr_in
));
584 if (name
.sa
.sa_family
== AF_INET6
) {
585 su
= XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
586 memcpy(su
, &name
, sizeof(struct sockaddr_in6
));
587 sockunion_normalise_mapped(su
);
593 /* Print sockunion structure */
594 static void __attribute__((unused
)) sockunion_print(const union sockunion
*su
)
599 switch (su
->sa
.sa_family
) {
601 printf("%s\n", inet_ntoa(su
->sin
.sin_addr
));
604 char buf
[SU_ADDRSTRLEN
];
606 printf("%s\n", inet_ntop(AF_INET6
, &(su
->sin6
.sin6_addr
), buf
,
612 struct sockaddr_dl
*sdl
;
614 sdl
= (struct sockaddr_dl
*)&(su
->sa
);
615 printf("link#%d\n", sdl
->sdl_index
);
619 printf("af_unknown %d\n", su
->sa
.sa_family
);
624 static int in6addr_cmp(const struct in6_addr
*addr1
,
625 const struct in6_addr
*addr2
)
628 const uint8_t *p1
, *p2
;
630 p1
= (const uint8_t *)addr1
;
631 p2
= (const uint8_t *)addr2
;
633 for (i
= 0; i
< sizeof(struct in6_addr
); i
++) {
636 else if (p1
[i
] < p2
[i
])
642 int sockunion_cmp(const union sockunion
*su1
, const union sockunion
*su2
)
644 if (su1
->sa
.sa_family
> su2
->sa
.sa_family
)
646 if (su1
->sa
.sa_family
< su2
->sa
.sa_family
)
649 if (su1
->sa
.sa_family
== AF_INET
) {
650 if (ntohl(sockunion2ip(su1
)) == ntohl(sockunion2ip(su2
)))
652 if (ntohl(sockunion2ip(su1
)) > ntohl(sockunion2ip(su2
)))
657 if (su1
->sa
.sa_family
== AF_INET6
)
658 return in6addr_cmp(&su1
->sin6
.sin6_addr
, &su2
->sin6
.sin6_addr
);
662 /* Duplicate sockunion. */
663 union sockunion
*sockunion_dup(const union sockunion
*su
)
665 union sockunion
*dup
=
666 XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
667 memcpy(dup
, su
, sizeof(union sockunion
));
671 void sockunion_free(union sockunion
*su
)
673 XFREE(MTYPE_SOCKUNION
, su
);
676 void sockunion_init(union sockunion
*su
)
678 memset(su
, 0, sizeof(union sockunion
));