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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
17 * along with GNU Zebra; see the file COPYING. If not, write to the Free
18 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
26 #include "sockunion.h"
31 DEFINE_MTYPE_STATIC(LIB
, SOCKUNION
, "Socket union")
33 const char *inet_sutop(const union sockunion
*su
, char *str
)
35 switch (su
->sa
.sa_family
) {
37 inet_ntop(AF_INET
, &su
->sin
.sin_addr
, str
, INET_ADDRSTRLEN
);
40 inet_ntop(AF_INET6
, &su
->sin6
.sin6_addr
, str
, INET6_ADDRSTRLEN
);
46 int str2sockunion(const char *str
, union sockunion
*su
)
50 memset(su
, 0, sizeof(union sockunion
));
52 ret
= inet_pton(AF_INET
, str
, &su
->sin
.sin_addr
);
53 if (ret
> 0) /* Valid IPv4 address format. */
55 su
->sin
.sin_family
= AF_INET
;
56 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
57 su
->sin
.sin_len
= sizeof(struct sockaddr_in
);
58 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
61 ret
= inet_pton(AF_INET6
, str
, &su
->sin6
.sin6_addr
);
62 if (ret
> 0) /* Valid IPv6 address format. */
64 su
->sin6
.sin6_family
= AF_INET6
;
66 su
->sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
73 const char *sockunion2str(const union sockunion
*su
, char *buf
, size_t len
)
75 switch (sockunion_family(su
)) {
77 snprintf(buf
, len
, "(unspec)");
80 return inet_ntop(AF_INET
, &su
->sin
.sin_addr
, buf
, len
);
82 return inet_ntop(AF_INET6
, &su
->sin6
.sin6_addr
, buf
, len
);
84 snprintf(buf
, len
, "(af %d)", sockunion_family(su
));
88 union sockunion
*sockunion_str2su(const char *str
)
90 union sockunion
*su
= XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
92 if (!str2sockunion(str
, su
))
95 XFREE(MTYPE_SOCKUNION
, su
);
99 /* Convert IPv4 compatible IPv6 address to IPv4 address. */
100 static void sockunion_normalise_mapped(union sockunion
*su
)
102 struct sockaddr_in sin
;
104 if (su
->sa
.sa_family
== AF_INET6
105 && IN6_IS_ADDR_V4MAPPED(&su
->sin6
.sin6_addr
)) {
106 memset(&sin
, 0, sizeof(struct sockaddr_in
));
107 sin
.sin_family
= AF_INET
;
108 sin
.sin_port
= su
->sin6
.sin6_port
;
109 memcpy(&sin
.sin_addr
, ((char *)&su
->sin6
.sin6_addr
) + 12, 4);
110 memcpy(su
, &sin
, sizeof(struct sockaddr_in
));
114 /* return sockunion structure : this function should be revised. */
115 static const char *sockunion_log(const union sockunion
*su
, char *buf
,
118 switch (su
->sa
.sa_family
) {
120 return inet_ntop(AF_INET
, &su
->sin
.sin_addr
, buf
, len
);
123 return inet_ntop(AF_INET6
, &(su
->sin6
.sin6_addr
), buf
, len
);
127 snprintf(buf
, len
, "af_unknown %d ", su
->sa
.sa_family
);
132 /* Return socket of sockunion. */
133 int sockunion_socket(const union sockunion
*su
)
137 sock
= socket(su
->sa
.sa_family
, SOCK_STREAM
, 0);
139 char buf
[SU_ADDRSTRLEN
];
140 zlog_warn("Can't make socket for %s : %s",
141 sockunion_log(su
, buf
, SU_ADDRSTRLEN
),
142 safe_strerror(errno
));
149 /* Return accepted new socket file descriptor. */
150 int sockunion_accept(int sock
, union sockunion
*su
)
155 len
= sizeof(union sockunion
);
156 client_sock
= accept(sock
, (struct sockaddr
*)su
, &len
);
158 sockunion_normalise_mapped(su
);
162 /* Return sizeof union sockunion. */
163 static int sockunion_sizeof(const union sockunion
*su
)
168 switch (su
->sa
.sa_family
) {
170 ret
= sizeof(struct sockaddr_in
);
173 ret
= sizeof(struct sockaddr_in6
);
179 /* sockunion_connect returns
182 1 : connect is in progress */
183 enum connect_result
sockunion_connect(int fd
, const union sockunion
*peersu
,
184 unsigned short port
, ifindex_t ifindex
)
190 memcpy(&su
, peersu
, sizeof(union sockunion
));
192 switch (su
.sa
.sa_family
) {
194 su
.sin
.sin_port
= port
;
197 su
.sin6
.sin6_port
= port
;
199 if (IN6_IS_ADDR_LINKLOCAL(&su
.sin6
.sin6_addr
) && ifindex
) {
200 su
.sin6
.sin6_scope_id
= ifindex
;
201 SET_IN6_LINKLOCAL_IFINDEX(su
.sin6
.sin6_addr
, ifindex
);
207 /* Make socket non-block. */
208 val
= fcntl(fd
, F_GETFL
, 0);
209 fcntl(fd
, F_SETFL
, val
| O_NONBLOCK
);
211 /* Call connect function. */
212 ret
= connect(fd
, (struct sockaddr
*)&su
, sockunion_sizeof(&su
));
214 /* Immediate success */
216 fcntl(fd
, F_SETFL
, val
);
217 return connect_success
;
220 /* If connect is in progress then return 1 else it's real error. */
222 if (errno
!= EINPROGRESS
) {
223 char str
[SU_ADDRSTRLEN
];
224 zlog_info("can't connect to %s fd %d : %s",
225 sockunion_log(&su
, str
, sizeof str
), fd
,
226 safe_strerror(errno
));
227 return connect_error
;
231 fcntl(fd
, F_SETFL
, val
);
233 return connect_in_progress
;
236 /* Make socket from sockunion union. */
237 int sockunion_stream_socket(union sockunion
*su
)
241 if (su
->sa
.sa_family
== 0)
242 su
->sa
.sa_family
= AF_INET_UNION
;
244 sock
= socket(su
->sa
.sa_family
, SOCK_STREAM
, 0);
247 zlog_warn("can't make socket sockunion_stream_socket");
252 /* Bind socket to specified address. */
253 int sockunion_bind(int sock
, union sockunion
*su
, unsigned short port
,
254 union sockunion
*su_addr
)
259 if (su
->sa
.sa_family
== AF_INET
) {
260 size
= sizeof(struct sockaddr_in
);
261 su
->sin
.sin_port
= htons(port
);
262 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
263 su
->sin
.sin_len
= size
;
264 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
266 sockunion2ip(su
) = htonl(INADDR_ANY
);
267 } else if (su
->sa
.sa_family
== AF_INET6
) {
268 size
= sizeof(struct sockaddr_in6
);
269 su
->sin6
.sin6_port
= htons(port
);
271 su
->sin6
.sin6_len
= size
;
272 #endif /* SIN6_LEN */
273 if (su_addr
== NULL
) {
275 memset(&su
->sin6
.sin6_addr
, 0, sizeof(struct in6_addr
));
277 su
->sin6
.sin6_addr
= in6addr_any
;
278 #endif /* LINUX_IPV6 */
282 ret
= bind(sock
, (struct sockaddr
*)su
, size
);
284 char buf
[SU_ADDRSTRLEN
];
285 zlog_warn("can't bind socket for %s : %s",
286 sockunion_log(su
, buf
, SU_ADDRSTRLEN
),
287 safe_strerror(errno
));
293 int sockopt_reuseaddr(int sock
)
298 ret
= setsockopt(sock
, SOL_SOCKET
, SO_REUSEADDR
, (void *)&on
,
301 zlog_warn("can't set sockopt SO_REUSEADDR to socket %d", sock
);
308 int sockopt_reuseport(int sock
)
313 ret
= setsockopt(sock
, SOL_SOCKET
, SO_REUSEPORT
, (void *)&on
,
316 zlog_warn("can't set sockopt SO_REUSEPORT to socket %d", sock
);
322 int sockopt_reuseport(int sock
)
328 int sockopt_ttl(int family
, int sock
, int ttl
)
333 if (family
== AF_INET
) {
334 ret
= setsockopt(sock
, IPPROTO_IP
, IP_TTL
, (void *)&ttl
,
337 zlog_warn("can't set sockopt IP_TTL %d to socket %d",
344 if (family
== AF_INET6
) {
345 ret
= setsockopt(sock
, IPPROTO_IPV6
, IPV6_UNICAST_HOPS
,
346 (void *)&ttl
, sizeof(int));
349 "can't set sockopt IPV6_UNICAST_HOPS %d to socket %d",
358 int sockopt_cork(int sock
, int onoff
)
361 return setsockopt(sock
, IPPROTO_TCP
, TCP_CORK
, &onoff
, sizeof(onoff
));
367 int sockopt_mark_default(int sock
, int mark
, struct zebra_privs_t
*cap
)
372 if (cap
->change(ZPRIVS_RAISE
))
373 zlog_err("routing_socket: Can't raise privileges");
375 ret
= setsockopt(sock
, SOL_SOCKET
, SO_MARK
, &mark
, sizeof(mark
));
377 if (cap
->change(ZPRIVS_LOWER
))
378 zlog_err("routing_socket: Can't lower privileges");
386 int sockopt_minttl(int family
, int sock
, int minttl
)
389 if (family
== AF_INET
) {
390 int ret
= setsockopt(sock
, IPPROTO_IP
, IP_MINTTL
, &minttl
,
394 "can't set sockopt IP_MINTTL to %d on socket %d: %s",
395 minttl
, sock
, safe_strerror(errno
));
398 #endif /* IP_MINTTL */
399 #ifdef IPV6_MINHOPCOUNT
400 if (family
== AF_INET6
) {
401 int ret
= setsockopt(sock
, IPPROTO_IPV6
, IPV6_MINHOPCOUNT
,
402 &minttl
, sizeof(minttl
));
405 "can't set sockopt IPV6_MINHOPCOUNT to %d on socket %d: %s",
406 minttl
, sock
, safe_strerror(errno
));
415 int sockopt_v6only(int family
, int sock
)
420 if (family
== AF_INET6
) {
421 ret
= setsockopt(sock
, IPPROTO_IPV6
, IPV6_V6ONLY
, (void *)&on
,
425 "can't set sockopt IPV6_V6ONLY "
432 #endif /* IPV6_V6ONLY */
436 /* If same family and same prefix return 1. */
437 int sockunion_same(const union sockunion
*su1
, const union sockunion
*su2
)
441 if (su1
->sa
.sa_family
!= su2
->sa
.sa_family
)
444 switch (su1
->sa
.sa_family
) {
446 ret
= memcmp(&su1
->sin
.sin_addr
, &su2
->sin
.sin_addr
,
447 sizeof(struct in_addr
));
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
)
468 unsigned int sockunion_hash(const union sockunion
*su
)
470 switch (sockunion_family(su
)) {
472 return jhash_1word(su
->sin
.sin_addr
.s_addr
, 0);
474 return jhash2(su
->sin6
.sin6_addr
.s6_addr32
,
475 ZEBRA_NUM_OF(su
->sin6
.sin6_addr
.s6_addr32
), 0);
480 size_t family2addrsize(int family
)
484 return sizeof(struct in_addr
);
486 return sizeof(struct in6_addr
);
491 size_t sockunion_get_addrlen(const union sockunion
*su
)
493 return family2addrsize(sockunion_family(su
));
496 const u_char
*sockunion_get_addr(const union sockunion
*su
)
498 switch (sockunion_family(su
)) {
500 return (const u_char
*)&su
->sin
.sin_addr
.s_addr
;
502 return (const u_char
*)&su
->sin6
.sin6_addr
;
507 void sockunion_set(union sockunion
*su
, int family
, const u_char
*addr
,
510 if (family2addrsize(family
) != bytes
)
513 sockunion_family(su
) = family
;
516 memcpy(&su
->sin
.sin_addr
.s_addr
, addr
, bytes
);
519 memcpy(&su
->sin6
.sin6_addr
, addr
, bytes
);
524 /* After TCP connection is established. Get local address and port. */
525 union sockunion
*sockunion_getsockname(int fd
)
531 struct sockaddr_in sin
;
532 struct sockaddr_in6 sin6
;
533 char tmp_buffer
[128];
537 memset(&name
, 0, sizeof name
);
540 ret
= getsockname(fd
, (struct sockaddr
*)&name
, &len
);
542 zlog_warn("Can't get local address and port by getsockname: %s",
543 safe_strerror(errno
));
547 if (name
.sa
.sa_family
== AF_INET
) {
548 su
= XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
549 memcpy(su
, &name
, sizeof(struct sockaddr_in
));
552 if (name
.sa
.sa_family
== AF_INET6
) {
553 su
= XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
554 memcpy(su
, &name
, sizeof(struct sockaddr_in6
));
555 sockunion_normalise_mapped(su
);
561 /* After TCP connection is established. Get remote address and port. */
562 union sockunion
*sockunion_getpeername(int fd
)
568 struct sockaddr_in sin
;
569 struct sockaddr_in6 sin6
;
570 char tmp_buffer
[128];
574 memset(&name
, 0, sizeof name
);
576 ret
= getpeername(fd
, (struct sockaddr
*)&name
, &len
);
578 zlog_warn("Can't get remote address and port: %s",
579 safe_strerror(errno
));
583 if (name
.sa
.sa_family
== AF_INET
) {
584 su
= XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
585 memcpy(su
, &name
, sizeof(struct sockaddr_in
));
588 if (name
.sa
.sa_family
== AF_INET6
) {
589 su
= XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
590 memcpy(su
, &name
, sizeof(struct sockaddr_in6
));
591 sockunion_normalise_mapped(su
);
597 /* Print sockunion structure */
598 static void __attribute__((unused
)) sockunion_print(const union sockunion
*su
)
603 switch (su
->sa
.sa_family
) {
605 printf("%s\n", inet_ntoa(su
->sin
.sin_addr
));
608 char buf
[SU_ADDRSTRLEN
];
610 printf("%s\n", inet_ntop(AF_INET6
, &(su
->sin6
.sin6_addr
), buf
,
616 struct sockaddr_dl
*sdl
;
618 sdl
= (struct sockaddr_dl
*)&(su
->sa
);
619 printf("link#%d\n", sdl
->sdl_index
);
623 printf("af_unknown %d\n", su
->sa
.sa_family
);
628 static int in6addr_cmp(const struct in6_addr
*addr1
,
629 const struct in6_addr
*addr2
)
632 const u_char
*p1
, *p2
;
634 p1
= (const u_char
*)addr1
;
635 p2
= (const u_char
*)addr2
;
637 for (i
= 0; i
< sizeof(struct in6_addr
); i
++) {
640 else if (p1
[i
] < p2
[i
])
646 int sockunion_cmp(const union sockunion
*su1
, const union sockunion
*su2
)
648 if (su1
->sa
.sa_family
> su2
->sa
.sa_family
)
650 if (su1
->sa
.sa_family
< su2
->sa
.sa_family
)
653 if (su1
->sa
.sa_family
== AF_INET
) {
654 if (ntohl(sockunion2ip(su1
)) == ntohl(sockunion2ip(su2
)))
656 if (ntohl(sockunion2ip(su1
)) > ntohl(sockunion2ip(su2
)))
661 if (su1
->sa
.sa_family
== AF_INET6
)
662 return in6addr_cmp(&su1
->sin6
.sin6_addr
, &su2
->sin6
.sin6_addr
);
666 /* Duplicate sockunion. */
667 union sockunion
*sockunion_dup(const union sockunion
*su
)
669 union sockunion
*dup
=
670 XCALLOC(MTYPE_SOCKUNION
, sizeof(union sockunion
));
671 memcpy(dup
, su
, sizeof(union sockunion
));
675 void sockunion_free(union sockunion
*su
)
677 XFREE(MTYPE_SOCKUNION
, su
);
680 void sockunion_init(union sockunion
*su
)
682 memset(su
, 0, sizeof(union sockunion
));