2 Unix SMB/CIFS implementation.
4 Socket IPv4/IPv6 functions
6 Copyright (C) Stefan Metzmacher 2004
7 Copyright (C) Andrew Tridgell 2004-2005
8 Copyright (C) Jelmer Vernooij 2004
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "system/filesys.h"
26 #include "lib/socket/socket.h"
27 #include "system/network.h"
29 static NTSTATUS ipv4_init(struct socket_context *sock)
34 case SOCKET_TYPE_STREAM:
37 case SOCKET_TYPE_DGRAM:
41 return NT_STATUS_INVALID_PARAMETER;
44 sock->fd = socket(PF_INET, type, 0);
46 return map_nt_error_from_unix(errno);
49 sock->backend_name = "ipv4";
54 static void ip_close(struct socket_context *sock)
59 static NTSTATUS ip_connect_complete(struct socket_context *sock, uint32_t flags)
62 socklen_t len = sizeof(error);
64 /* check for any errors that may have occurred - this is needed
65 for non-blocking connect */
66 ret = getsockopt(sock->fd, SOL_SOCKET, SO_ERROR, &error, &len);
68 return map_nt_error_from_unix(errno);
71 return map_nt_error_from_unix(error);
74 if (!(flags & SOCKET_FLAG_BLOCK)) {
75 ret = set_blocking(sock->fd, False);
77 return map_nt_error_from_unix(errno);
81 sock->state = SOCKET_STATE_CLIENT_CONNECTED;
87 static NTSTATUS ipv4_connect(struct socket_context *sock,
88 const struct socket_address *my_address,
89 const struct socket_address *srv_address,
92 struct sockaddr_in srv_addr;
93 struct ipv4_addr my_ip;
94 struct ipv4_addr srv_ip;
97 if (my_address && my_address->sockaddr) {
98 ret = bind(sock->fd, my_address->sockaddr, my_address->sockaddrlen);
100 return map_nt_error_from_unix(errno);
102 } else if (my_address) {
103 my_ip = interpret_addr2(my_address->addr);
105 if (my_ip.addr != 0 || my_address->port != 0) {
106 struct sockaddr_in my_addr;
107 ZERO_STRUCT(my_addr);
108 #ifdef HAVE_SOCK_SIN_LEN
109 my_addr.sin_len = sizeof(my_addr);
111 my_addr.sin_addr.s_addr = my_ip.addr;
112 my_addr.sin_port = htons(my_address->port);
113 my_addr.sin_family = PF_INET;
115 ret = bind(sock->fd, (struct sockaddr *)&my_addr, sizeof(my_addr));
117 return map_nt_error_from_unix(errno);
122 if (srv_address->sockaddr) {
123 ret = connect(sock->fd, srv_address->sockaddr, srv_address->sockaddrlen);
125 return map_nt_error_from_unix(errno);
128 srv_ip = interpret_addr2(srv_address->addr);
130 return NT_STATUS_BAD_NETWORK_NAME;
133 ZERO_STRUCT(srv_addr);
134 #ifdef HAVE_SOCK_SIN_LEN
135 srv_addr.sin_len = sizeof(srv_addr);
137 srv_addr.sin_addr.s_addr= srv_ip.addr;
138 srv_addr.sin_port = htons(srv_address->port);
139 srv_addr.sin_family = PF_INET;
141 ret = connect(sock->fd, (const struct sockaddr *)&srv_addr, sizeof(srv_addr));
143 return map_nt_error_from_unix(errno);
147 return ip_connect_complete(sock, flags);
152 note that for simplicity of the API, socket_listen() is also
153 use for DGRAM sockets, but in reality only a bind() is done
155 static NTSTATUS ipv4_listen(struct socket_context *sock,
156 const struct socket_address *my_address,
157 int queue_size, uint32_t flags)
159 struct sockaddr_in my_addr;
160 struct ipv4_addr ip_addr;
163 socket_set_option(sock, "SO_REUSEADDR=1", NULL);
165 if (my_address->sockaddr) {
166 ret = bind(sock->fd, my_address->sockaddr, my_address->sockaddrlen);
168 ip_addr = interpret_addr2(my_address->addr);
170 ZERO_STRUCT(my_addr);
171 #ifdef HAVE_SOCK_SIN_LEN
172 my_addr.sin_len = sizeof(my_addr);
174 my_addr.sin_addr.s_addr = ip_addr.addr;
175 my_addr.sin_port = htons(my_address->port);
176 my_addr.sin_family = PF_INET;
178 ret = bind(sock->fd, (struct sockaddr *)&my_addr, sizeof(my_addr));
182 return map_nt_error_from_unix(errno);
185 if (sock->type == SOCKET_TYPE_STREAM) {
186 ret = listen(sock->fd, queue_size);
188 return map_nt_error_from_unix(errno);
192 if (!(flags & SOCKET_FLAG_BLOCK)) {
193 ret = set_blocking(sock->fd, False);
195 return map_nt_error_from_unix(errno);
199 sock->state= SOCKET_STATE_SERVER_LISTEN;
204 static NTSTATUS ipv4_accept(struct socket_context *sock, struct socket_context **new_sock)
206 struct sockaddr_in cli_addr;
207 socklen_t cli_addr_len = sizeof(cli_addr);
210 if (sock->type != SOCKET_TYPE_STREAM) {
211 return NT_STATUS_INVALID_PARAMETER;
214 new_fd = accept(sock->fd, (struct sockaddr *)&cli_addr, &cli_addr_len);
216 return map_nt_error_from_unix(errno);
219 if (!(sock->flags & SOCKET_FLAG_BLOCK)) {
220 int ret = set_blocking(new_fd, False);
223 return map_nt_error_from_unix(errno);
227 /* TODO: we could add a 'accept_check' hook here
228 * which get the black/white lists via socket_set_accept_filter()
229 * or something like that
233 (*new_sock) = talloc(NULL, struct socket_context);
236 return NT_STATUS_NO_MEMORY;
239 /* copy the socket_context */
240 (*new_sock)->type = sock->type;
241 (*new_sock)->state = SOCKET_STATE_SERVER_CONNECTED;
242 (*new_sock)->flags = sock->flags;
244 (*new_sock)->fd = new_fd;
246 (*new_sock)->private_data = NULL;
247 (*new_sock)->ops = sock->ops;
248 (*new_sock)->backend_name = sock->backend_name;
253 static NTSTATUS ip_recv(struct socket_context *sock, void *buf,
254 size_t wantlen, size_t *nread)
260 gotlen = recv(sock->fd, buf, wantlen, 0);
262 return NT_STATUS_END_OF_FILE;
263 } else if (gotlen == -1) {
264 return map_nt_error_from_unix(errno);
273 static NTSTATUS ipv4_recvfrom(struct socket_context *sock, void *buf,
274 size_t wantlen, size_t *nread,
275 TALLOC_CTX *addr_ctx, struct socket_address **_src)
278 struct sockaddr_in *from_addr;
279 socklen_t from_len = sizeof(*from_addr);
280 struct socket_address *src;
283 src = talloc(addr_ctx, struct socket_address);
285 return NT_STATUS_NO_MEMORY;
288 src->family = sock->backend_name;
290 from_addr = talloc(src, struct sockaddr_in);
293 return NT_STATUS_NO_MEMORY;
296 src->sockaddr = (struct sockaddr *)from_addr;
300 gotlen = recvfrom(sock->fd, buf, wantlen, 0,
301 src->sockaddr, &from_len);
304 return NT_STATUS_END_OF_FILE;
305 } else if (gotlen == -1) {
307 return map_nt_error_from_unix(errno);
310 src->sockaddrlen = from_len;
312 addr = inet_ntoa(from_addr->sin_addr);
315 return NT_STATUS_INTERNAL_ERROR;
317 src->addr = talloc_strdup(src, addr);
318 if (src->addr == NULL) {
320 return NT_STATUS_NO_MEMORY;
322 src->port = ntohs(from_addr->sin_port);
329 static NTSTATUS ip_send(struct socket_context *sock,
330 const DATA_BLOB *blob, size_t *sendlen)
336 len = send(sock->fd, blob->data, blob->length, 0);
338 return map_nt_error_from_unix(errno);
346 static NTSTATUS ipv4_sendto(struct socket_context *sock,
347 const DATA_BLOB *blob, size_t *sendlen,
348 const struct socket_address *dest_addr)
352 if (dest_addr->sockaddr) {
353 len = sendto(sock->fd, blob->data, blob->length, 0,
354 dest_addr->sockaddr, dest_addr->sockaddrlen);
356 struct sockaddr_in srv_addr;
357 struct ipv4_addr addr;
359 ZERO_STRUCT(srv_addr);
360 #ifdef HAVE_SOCK_SIN_LEN
361 srv_addr.sin_len = sizeof(srv_addr);
363 addr = interpret_addr2(dest_addr->addr);
364 if (addr.addr == 0) {
365 return NT_STATUS_HOST_UNREACHABLE;
367 srv_addr.sin_addr.s_addr = addr.addr;
368 srv_addr.sin_port = htons(dest_addr->port);
369 srv_addr.sin_family = PF_INET;
373 len = sendto(sock->fd, blob->data, blob->length, 0,
374 (struct sockaddr *)&srv_addr, sizeof(srv_addr));
377 return map_nt_error_from_unix(errno);
385 static NTSTATUS ipv4_set_option(struct socket_context *sock, const char *option, const char *val)
387 set_socket_options(sock->fd, option);
391 static char *ipv4_get_peer_name(struct socket_context *sock, TALLOC_CTX *mem_ctx)
393 struct sockaddr_in peer_addr;
394 socklen_t len = sizeof(peer_addr);
398 ret = getpeername(sock->fd, (struct sockaddr *)&peer_addr, &len);
403 he = gethostbyaddr((char *)&peer_addr.sin_addr, sizeof(peer_addr.sin_addr), AF_INET);
408 return talloc_strdup(mem_ctx, he->h_name);
411 static struct socket_address *ipv4_get_peer_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
413 struct sockaddr_in *peer_addr;
414 socklen_t len = sizeof(*peer_addr);
416 struct socket_address *peer;
419 peer = talloc(mem_ctx, struct socket_address);
424 peer->family = sock->backend_name;
425 peer_addr = talloc(peer, struct sockaddr_in);
431 peer->sockaddr = (struct sockaddr *)peer_addr;
433 ret = getpeername(sock->fd, peer->sockaddr, &len);
439 peer->sockaddrlen = len;
441 addr = inet_ntoa(peer_addr->sin_addr);
446 peer->addr = talloc_strdup(peer, addr);
451 peer->port = ntohs(peer_addr->sin_port);
456 static struct socket_address *ipv4_get_my_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
458 struct sockaddr_in *local_addr;
459 socklen_t len = sizeof(*local_addr);
461 struct socket_address *local;
464 local = talloc(mem_ctx, struct socket_address);
469 local->family = sock->backend_name;
470 local_addr = talloc(local, struct sockaddr_in);
476 local->sockaddr = (struct sockaddr *)local_addr;
478 ret = getsockname(sock->fd, local->sockaddr, &len);
484 local->sockaddrlen = len;
486 addr = inet_ntoa(local_addr->sin_addr);
491 local->addr = talloc_strdup(local, addr);
496 local->port = ntohs(local_addr->sin_port);
500 static int ip_get_fd(struct socket_context *sock)
505 static NTSTATUS ip_pending(struct socket_context *sock, size_t *npending)
508 if (ioctl(sock->fd, FIONREAD, &value) == 0) {
512 return map_nt_error_from_unix(errno);
515 static const struct socket_ops ipv4_ops = {
517 .fn_init = ipv4_init,
518 .fn_connect = ipv4_connect,
519 .fn_connect_complete = ip_connect_complete,
520 .fn_listen = ipv4_listen,
521 .fn_accept = ipv4_accept,
523 .fn_recvfrom = ipv4_recvfrom,
525 .fn_sendto = ipv4_sendto,
526 .fn_pending = ip_pending,
527 .fn_close = ip_close,
529 .fn_set_option = ipv4_set_option,
531 .fn_get_peer_name = ipv4_get_peer_name,
532 .fn_get_peer_addr = ipv4_get_peer_addr,
533 .fn_get_my_addr = ipv4_get_my_addr,
534 .fn_get_fd = ip_get_fd
537 const struct socket_ops *socket_ipv4_ops(enum socket_type type)
544 static struct in6_addr interpret_addr6(const char *name)
548 if (name == NULL) return in6addr_any;
550 if (strcasecmp(name, "localhost") == 0) {
554 he = gethostbyname2(name, PF_INET6);
556 if (he == NULL) return in6addr_any;
558 return *((struct in6_addr *)he->h_addr);
561 static NTSTATUS ipv6_tcp_init(struct socket_context *sock)
563 sock->fd = socket(PF_INET6, SOCK_STREAM, 0);
564 if (sock->fd == -1) {
565 return map_nt_error_from_unix(errno);
568 sock->backend_name = "ipv6";
573 static NTSTATUS ipv6_tcp_connect(struct socket_context *sock,
574 const struct socket_address *my_address,
575 const struct socket_address *srv_address,
580 if (my_address && my_address->sockaddr) {
581 ret = bind(sock->fd, my_address->sockaddr, my_address->sockaddrlen);
583 return map_nt_error_from_unix(errno);
585 } else if (my_address) {
586 struct in6_addr my_ip;
587 my_ip = interpret_addr6(my_address->addr);
589 if (memcmp(&my_ip, &in6addr_any, sizeof(my_ip)) || my_address->port != 0) {
590 struct sockaddr_in6 my_addr;
591 ZERO_STRUCT(my_addr);
592 my_addr.sin6_addr = my_ip;
593 my_addr.sin6_port = htons(my_address->port);
594 my_addr.sin6_family = PF_INET6;
596 ret = bind(sock->fd, (struct sockaddr *)&my_addr, sizeof(my_addr));
598 return map_nt_error_from_unix(errno);
603 if (srv_address->sockaddr) {
604 ret = connect(sock->fd, srv_address->sockaddr, srv_address->sockaddrlen);
606 struct in6_addr srv_ip;
607 struct sockaddr_in6 srv_addr;
608 srv_ip = interpret_addr6(srv_address->addr);
609 if (memcmp(&srv_ip, &in6addr_any, sizeof(srv_ip)) == 0) {
610 return NT_STATUS_BAD_NETWORK_NAME;
613 ZERO_STRUCT(srv_addr);
614 srv_addr.sin6_addr = srv_ip;
615 srv_addr.sin6_port = htons(srv_address->port);
616 srv_addr.sin6_family = PF_INET6;
618 ret = connect(sock->fd, (const struct sockaddr *)&srv_addr, sizeof(srv_addr));
621 return map_nt_error_from_unix(errno);
624 return ip_connect_complete(sock, flags);
627 static NTSTATUS ipv6_tcp_listen(struct socket_context *sock,
628 const struct socket_address *my_address,
629 int queue_size, uint32_t flags)
631 struct sockaddr_in6 my_addr;
632 struct in6_addr ip_addr;
635 socket_set_option(sock, "SO_REUSEADDR=1", NULL);
637 if (my_address->sockaddr) {
638 ret = bind(sock->fd, my_address->sockaddr, my_address->sockaddrlen);
640 ip_addr = interpret_addr6(my_address->addr);
642 ZERO_STRUCT(my_addr);
643 my_addr.sin6_addr = ip_addr;
644 my_addr.sin6_port = htons(my_address->port);
645 my_addr.sin6_family = PF_INET6;
647 ret = bind(sock->fd, (struct sockaddr *)&my_addr, sizeof(my_addr));
651 return map_nt_error_from_unix(errno);
654 if (sock->type == SOCKET_TYPE_STREAM) {
655 ret = listen(sock->fd, queue_size);
657 return map_nt_error_from_unix(errno);
661 if (!(flags & SOCKET_FLAG_BLOCK)) {
662 ret = set_blocking(sock->fd, False);
664 return map_nt_error_from_unix(errno);
668 sock->state= SOCKET_STATE_SERVER_LISTEN;
673 static NTSTATUS ipv6_tcp_accept(struct socket_context *sock, struct socket_context **new_sock)
675 struct sockaddr_in cli_addr;
676 socklen_t cli_addr_len = sizeof(cli_addr);
679 if (sock->type != SOCKET_TYPE_STREAM) {
680 return NT_STATUS_INVALID_PARAMETER;
684 new_fd = accept(sock->fd, (struct sockaddr *)&cli_addr, &cli_addr_len);
686 return map_nt_error_from_unix(errno);
689 if (!(sock->flags & SOCKET_FLAG_BLOCK)) {
690 int ret = set_blocking(new_fd, False);
693 return map_nt_error_from_unix(errno);
697 /* TODO: we could add a 'accept_check' hook here
698 * which get the black/white lists via socket_set_accept_filter()
699 * or something like that
703 (*new_sock) = talloc(NULL, struct socket_context);
706 return NT_STATUS_NO_MEMORY;
709 /* copy the socket_context */
710 (*new_sock)->type = sock->type;
711 (*new_sock)->state = SOCKET_STATE_SERVER_CONNECTED;
712 (*new_sock)->flags = sock->flags;
714 (*new_sock)->fd = new_fd;
716 (*new_sock)->private_data = NULL;
717 (*new_sock)->ops = sock->ops;
718 (*new_sock)->backend_name = sock->backend_name;
723 static NTSTATUS ipv6_recvfrom(struct socket_context *sock, void *buf,
724 size_t wantlen, size_t *nread,
725 TALLOC_CTX *addr_ctx, struct socket_address **_src)
728 struct sockaddr_in6 *from_addr;
729 socklen_t from_len = sizeof(*from_addr);
730 struct socket_address *src;
733 src = talloc(addr_ctx, struct socket_address);
735 return NT_STATUS_NO_MEMORY;
738 src->family = sock->backend_name;
740 from_addr = talloc(src, struct sockaddr_in6);
743 return NT_STATUS_NO_MEMORY;
746 src->sockaddr = (struct sockaddr *)from_addr;
750 gotlen = recvfrom(sock->fd, buf, wantlen, 0,
751 src->sockaddr, &from_len);
754 return NT_STATUS_END_OF_FILE;
755 } else if (gotlen == -1) {
757 return map_nt_error_from_unix(errno);
760 src->sockaddrlen = from_len;
762 he = gethostbyaddr((void *)&from_addr->sin6_addr, sizeof(from_addr->sin6_addr), AF_INET6);
765 return NT_STATUS_INTERNAL_ERROR;
767 src->addr = talloc_strdup(src, he->h_name);
768 if (src->addr == NULL) {
770 return NT_STATUS_NO_MEMORY;
772 src->port = ntohs(from_addr->sin6_port);
779 static NTSTATUS ipv6_sendto(struct socket_context *sock,
780 const DATA_BLOB *blob, size_t *sendlen,
781 const struct socket_address *dest_addr)
785 if (dest_addr->sockaddr) {
786 len = sendto(sock->fd, blob->data, blob->length, 0,
787 dest_addr->sockaddr, dest_addr->sockaddrlen);
789 struct sockaddr_in6 srv_addr;
790 struct in6_addr addr;
792 ZERO_STRUCT(srv_addr);
793 addr = interpret_addr6(dest_addr->addr);
794 if (addr.s6_addr == 0) {
795 return NT_STATUS_HOST_UNREACHABLE;
797 srv_addr.sin6_addr = addr;
798 srv_addr.sin6_port = htons(dest_addr->port);
799 srv_addr.sin6_family = PF_INET6;
803 len = sendto(sock->fd, blob->data, blob->length, 0,
804 (struct sockaddr *)&srv_addr, sizeof(srv_addr));
807 return map_nt_error_from_unix(errno);
815 static NTSTATUS ipv6_tcp_set_option(struct socket_context *sock, const char *option, const char *val)
817 set_socket_options(sock->fd, option);
821 static char *ipv6_tcp_get_peer_name(struct socket_context *sock, TALLOC_CTX *mem_ctx)
823 struct sockaddr_in6 peer_addr;
824 socklen_t len = sizeof(peer_addr);
828 ret = getpeername(sock->fd, (struct sockaddr *)&peer_addr, &len);
833 he = gethostbyaddr((char *)&peer_addr.sin6_addr, sizeof(peer_addr.sin6_addr), AF_INET6);
838 return talloc_strdup(mem_ctx, he->h_name);
841 static struct socket_address *ipv6_tcp_get_peer_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
843 struct sockaddr_in6 *peer_addr;
844 socklen_t len = sizeof(*peer_addr);
845 struct socket_address *peer;
848 const char *addr_ret;
850 peer = talloc(mem_ctx, struct socket_address);
855 peer->family = sock->backend_name;
856 peer_addr = talloc(peer, struct sockaddr_in6);
862 peer->sockaddr = (struct sockaddr *)peer_addr;
864 ret = getpeername(sock->fd, peer->sockaddr, &len);
870 peer->sockaddrlen = len;
872 addr_ret = inet_ntop(AF_INET6, &peer_addr->sin6_addr, addr, sizeof(addr));
873 if (addr_ret == NULL) {
878 peer->addr = talloc_strdup(peer, addr_ret);
879 if (peer->addr == NULL) {
884 peer->port = ntohs(peer_addr->sin6_port);
889 static struct socket_address *ipv6_tcp_get_my_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
891 struct sockaddr_in6 *local_addr;
892 socklen_t len = sizeof(*local_addr);
893 struct socket_address *local;
897 local = talloc(mem_ctx, struct socket_address);
902 local->family = sock->backend_name;
903 local_addr = talloc(local, struct sockaddr_in6);
909 local->sockaddr = (struct sockaddr *)local_addr;
911 ret = getsockname(sock->fd, local->sockaddr, &len);
917 local->sockaddrlen = len;
919 he = gethostbyaddr((char *)&local_addr->sin6_addr, len, AF_INET6);
921 if (!he || !he->h_name) {
926 local->addr = talloc_strdup(mem_ctx, he->h_name);
931 local->port = ntohs(local_addr->sin6_port);
936 static const struct socket_ops ipv6_tcp_ops = {
938 .fn_init = ipv6_tcp_init,
939 .fn_connect = ipv6_tcp_connect,
940 .fn_connect_complete = ip_connect_complete,
941 .fn_listen = ipv6_tcp_listen,
942 .fn_accept = ipv6_tcp_accept,
944 .fn_recvfrom = ipv6_recvfrom,
945 .fn_sendto = ipv6_sendto,
947 .fn_close = ip_close,
948 .fn_pending = ip_pending,
950 .fn_set_option = ipv6_tcp_set_option,
952 .fn_get_peer_name = ipv6_tcp_get_peer_name,
953 .fn_get_peer_addr = ipv6_tcp_get_peer_addr,
954 .fn_get_my_addr = ipv6_tcp_get_my_addr,
956 .fn_get_fd = ip_get_fd
959 const struct socket_ops *socket_ipv6_ops(enum socket_type type)
961 return &ipv6_tcp_ops;