2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Tim Potter 2000-2001
6 Copyright (C) Jeremy Allison 1992-2007
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "system/filesys.h"
25 #include "../lib/async_req/async_sock.h"
26 #include "../lib/util/select.h"
27 #include "lib/socket/interfaces.h"
28 #include "../lib/util/tevent_unix.h"
29 #include "../lib/util/tevent_ntstatus.h"
30 #include "../lib/tsocket/tsocket.h"
32 const char *client_addr(int fd
, char *addr
, size_t addrlen
)
34 return get_peer_addr(fd
,addr
,addrlen
);
38 /* Not currently used. JRA. */
39 int client_socket_port(int fd
)
41 return get_socket_port(fd
);
45 /****************************************************************************
46 Determine if a file descriptor is in fact a socket.
47 ****************************************************************************/
49 bool is_a_socket(int fd
)
54 return(getsockopt(fd
, SOL_SOCKET
, SO_TYPE
, (char *)&v
, &l
) == 0);
57 /****************************************************************************
59 ****************************************************************************/
61 ssize_t
read_udp_v4_socket(int fd
,
64 struct sockaddr_storage
*psa
)
67 socklen_t socklen
= sizeof(*psa
);
68 struct sockaddr_in
*si
= (struct sockaddr_in
*)psa
;
70 memset((char *)psa
,'\0',socklen
);
72 ret
= (ssize_t
)sys_recvfrom(fd
,buf
,len
,0,
73 (struct sockaddr
*)psa
,&socklen
);
75 /* Don't print a low debug error for a non-blocking socket. */
76 if (errno
== EAGAIN
) {
77 DEBUG(10,("read_udp_v4_socket: returned EAGAIN\n"));
79 DEBUG(2,("read_udp_v4_socket: failed. errno=%s\n",
85 if (psa
->ss_family
!= AF_INET
) {
86 DEBUG(2,("read_udp_v4_socket: invalid address family %d "
87 "(not IPv4)\n", (int)psa
->ss_family
));
91 DEBUG(10,("read_udp_v4_socket: ip %s port %d read: %lu\n",
92 inet_ntoa(si
->sin_addr
),
99 /****************************************************************************
100 Read data from a file descriptor with a timout in msec.
101 mincount = if timeout, minimum to read before returning
102 maxcount = number to be read.
103 time_out = timeout in milliseconds
104 NB. This can be called with a non-socket fd, don't change
105 sys_read() to sys_recv() or other socket call.
106 ****************************************************************************/
108 NTSTATUS
read_fd_with_timeout(int fd
, char *buf
,
109 size_t mincnt
, size_t maxcnt
,
110 unsigned int time_out
,
117 /* just checking .... */
127 while (nread
< mincnt
) {
128 readret
= sys_read(fd
, buf
+ nread
, maxcnt
- nread
);
131 DEBUG(5,("read_fd_with_timeout: "
132 "blocking read. EOF from client.\n"));
133 return NT_STATUS_END_OF_FILE
;
137 return map_nt_error_from_unix(errno
);
144 /* Most difficult - timeout read */
145 /* If this is ever called on a disk file and
146 mincnt is greater then the filesize then
147 system performance will suffer severely as
148 select always returns true on disk files */
150 for (nread
=0; nread
< mincnt
; ) {
153 pollrtn
= poll_intr_one_fd(fd
, POLLIN
|POLLHUP
, time_out
,
158 return map_nt_error_from_unix(errno
);
161 /* Did we timeout ? */
162 if ((pollrtn
== 0) ||
163 ((revents
& (POLLIN
|POLLHUP
|POLLERR
)) == 0)) {
164 DEBUG(10,("read_fd_with_timeout: timeout read. "
165 "select timed out.\n"));
166 return NT_STATUS_IO_TIMEOUT
;
169 readret
= sys_read(fd
, buf
+nread
, maxcnt
-nread
);
172 /* we got EOF on the file descriptor */
173 DEBUG(5,("read_fd_with_timeout: timeout read. "
174 "EOF from client.\n"));
175 return NT_STATUS_END_OF_FILE
;
179 return map_nt_error_from_unix(errno
);
186 /* Return the number we got */
193 /****************************************************************************
194 Read data from an fd, reading exactly N bytes.
195 NB. This can be called with a non-socket fd, don't add dependencies
197 ****************************************************************************/
199 NTSTATUS
read_data(int fd
, char *buffer
, size_t N
)
201 return read_fd_with_timeout(fd
, buffer
, N
, N
, 0, NULL
);
204 ssize_t
iov_buflen(const struct iovec
*iov
, int iovcnt
)
209 for (i
=0; i
<iovcnt
; i
++) {
210 size_t thislen
= iov
[i
].iov_len
;
211 size_t tmp
= buflen
+ thislen
;
213 if ((tmp
< buflen
) || (tmp
< thislen
)) {
222 /****************************************************************************
223 Write all data from an iov array
224 NB. This can be called with a non-socket fd, don't add dependencies
226 ****************************************************************************/
228 ssize_t
write_data_iov(int fd
, const struct iovec
*orig_iov
, int iovcnt
)
233 struct iovec
*iov_copy
, *iov
;
235 to_send
= iov_buflen(orig_iov
, iovcnt
);
241 thistime
= sys_writev(fd
, orig_iov
, iovcnt
);
242 if ((thistime
<= 0) || (thistime
== to_send
)) {
248 * We could not send everything in one call. Make a copy of iov that
249 * we can mess with. We keep a copy of the array start in iov_copy for
250 * the TALLOC_FREE, because we're going to modify iov later on,
251 * discarding elements.
254 iov_copy
= (struct iovec
*)talloc_memdup(
255 talloc_tos(), orig_iov
, sizeof(struct iovec
) * iovcnt
);
257 if (iov_copy
== NULL
) {
263 while (sent
< to_send
) {
265 * We have to discard "thistime" bytes from the beginning
266 * iov array, "thistime" contains the number of bytes sent
269 while (thistime
> 0) {
270 if (thistime
< iov
[0].iov_len
) {
272 (char *)iov
[0].iov_base
+ thistime
;
273 iov
[0].iov_base
= (void *)new_base
;
274 iov
[0].iov_len
-= thistime
;
277 thistime
-= iov
[0].iov_len
;
282 thistime
= sys_writev(fd
, iov
, iovcnt
);
289 TALLOC_FREE(iov_copy
);
293 /****************************************************************************
295 NB. This can be called with a non-socket fd, don't add dependencies
297 ****************************************************************************/
299 ssize_t
write_data(int fd
, const char *buffer
, size_t N
)
303 iov
.iov_base
= discard_const_p(void, buffer
);
305 return write_data_iov(fd
, &iov
, 1);
308 /****************************************************************************
309 Send a keepalive packet (rfc1002).
310 ****************************************************************************/
312 bool send_keepalive(int client
)
314 unsigned char buf
[4];
316 buf
[0] = NBSSkeepalive
;
317 buf
[1] = buf
[2] = buf
[3] = 0;
319 return(write_data(client
,(char *)buf
,4) == 4);
322 /****************************************************************************
323 Read 4 bytes of a smb packet and return the smb length of the packet.
324 Store the result in the buffer.
325 This version of the function will return a length of zero on receiving
327 Timeout is in milliseconds.
328 ****************************************************************************/
330 NTSTATUS
read_smb_length_return_keepalive(int fd
, char *inbuf
,
331 unsigned int timeout
,
337 status
= read_fd_with_timeout(fd
, inbuf
, 4, 4, timeout
, NULL
);
339 if (!NT_STATUS_IS_OK(status
)) {
343 *len
= smb_len(inbuf
);
344 msg_type
= CVAL(inbuf
,0);
346 if (msg_type
== NBSSkeepalive
) {
347 DEBUG(5,("Got keepalive packet\n"));
350 DEBUG(10,("got smb length of %lu\n",(unsigned long)(*len
)));
355 /****************************************************************************
356 Read an smb from a fd.
357 The timeout is in milliseconds.
358 This function will return on receipt of a session keepalive packet.
359 maxlen is the max number of bytes to return, not including the 4 byte
360 length. If zero it means buflen limit.
361 Doesn't check the MAC on signed packets.
362 ****************************************************************************/
364 NTSTATUS
receive_smb_raw(int fd
, char *buffer
, size_t buflen
, unsigned int timeout
,
365 size_t maxlen
, size_t *p_len
)
370 status
= read_smb_length_return_keepalive(fd
,buffer
,timeout
,&len
);
372 if (!NT_STATUS_IS_OK(status
)) {
373 DEBUG(0, ("read_fd_with_timeout failed, read "
374 "error = %s.\n", nt_errstr(status
)));
379 DEBUG(0,("Invalid packet length! (%lu bytes).\n",
380 (unsigned long)len
));
381 return NT_STATUS_INVALID_PARAMETER
;
386 len
= MIN(len
,maxlen
);
389 status
= read_fd_with_timeout(
390 fd
, buffer
+4, len
, len
, timeout
, &len
);
392 if (!NT_STATUS_IS_OK(status
)) {
393 DEBUG(0, ("read_fd_with_timeout failed, read error = "
394 "%s.\n", nt_errstr(status
)));
398 /* not all of samba3 properly checks for packet-termination
399 * of strings. This ensures that we don't run off into
401 SSVAL(buffer
+4,len
, 0);
408 /****************************************************************************
409 Open a socket of the specified type, port, and address for incoming data.
410 ****************************************************************************/
412 int open_socket_in(int type
,
415 const struct sockaddr_storage
*psock
,
418 struct sockaddr_storage sock
;
420 socklen_t slen
= sizeof(struct sockaddr_in
);
424 #if defined(HAVE_IPV6)
425 if (sock
.ss_family
== AF_INET6
) {
426 ((struct sockaddr_in6
*)&sock
)->sin6_port
= htons(port
);
427 slen
= sizeof(struct sockaddr_in6
);
430 if (sock
.ss_family
== AF_INET
) {
431 ((struct sockaddr_in
*)&sock
)->sin_port
= htons(port
);
434 res
= socket(sock
.ss_family
, type
, 0 );
437 dbgtext( "open_socket_in(): socket() call failed: " );
438 dbgtext( "%s\n", strerror( errno
) );
443 /* This block sets/clears the SO_REUSEADDR and possibly SO_REUSEPORT. */
445 int val
= rebind
? 1 : 0;
446 if( setsockopt(res
,SOL_SOCKET
,SO_REUSEADDR
,
447 (char *)&val
,sizeof(val
)) == -1 ) {
448 if( DEBUGLVL( dlevel
) ) {
449 dbgtext( "open_socket_in(): setsockopt: " );
450 dbgtext( "SO_REUSEADDR = %s ",
451 val
?"true":"false" );
452 dbgtext( "on port %d failed ", port
);
453 dbgtext( "with error = %s\n", strerror(errno
) );
457 if( setsockopt(res
,SOL_SOCKET
,SO_REUSEPORT
,
458 (char *)&val
,sizeof(val
)) == -1 ) {
459 if( DEBUGLVL( dlevel
) ) {
460 dbgtext( "open_socket_in(): setsockopt: ");
461 dbgtext( "SO_REUSEPORT = %s ",
463 dbgtext( "on port %d failed ", port
);
464 dbgtext( "with error = %s\n", strerror(errno
));
467 #endif /* SO_REUSEPORT */
472 * As IPV6_V6ONLY is the default on some systems,
473 * we better try to be consistent and always use it.
475 * This also avoids using IPv4 via AF_INET6 sockets
476 * and makes sure %I never resolves to a '::ffff:192.168.0.1'
479 if (sock
.ss_family
== AF_INET6
) {
483 ret
= setsockopt(res
, IPPROTO_IPV6
, IPV6_V6ONLY
,
484 (const void *)&val
, sizeof(val
));
487 dbgtext("open_socket_in(): IPV6_ONLY failed: ");
488 dbgtext("%s\n", strerror(errno
));
496 /* now we've got a socket - we need to bind it */
497 if (bind(res
, (struct sockaddr
*)&sock
, slen
) == -1 ) {
498 if( DEBUGLVL(dlevel
) && (port
== NMB_PORT
||
499 port
== NBT_SMB_PORT
||
500 port
== TCP_SMB_PORT
) ) {
501 char addr
[INET6_ADDRSTRLEN
];
502 print_sockaddr(addr
, sizeof(addr
),
504 dbgtext( "bind failed on port %d ", port
);
505 dbgtext( "socket_addr = %s.\n", addr
);
506 dbgtext( "Error = %s\n", strerror(errno
));
512 DEBUG( 10, ( "bind succeeded on port %d\n", port
) );
516 struct open_socket_out_state
{
518 struct tevent_context
*ev
;
519 struct sockaddr_storage ss
;
525 static void open_socket_out_connected(struct tevent_req
*subreq
);
527 static int open_socket_out_state_destructor(struct open_socket_out_state
*s
)
535 /****************************************************************************
536 Create an outgoing socket. timeout is in milliseconds.
537 **************************************************************************/
539 struct tevent_req
*open_socket_out_send(TALLOC_CTX
*mem_ctx
,
540 struct tevent_context
*ev
,
541 const struct sockaddr_storage
*pss
,
545 char addr
[INET6_ADDRSTRLEN
];
546 struct tevent_req
*result
, *subreq
;
547 struct open_socket_out_state
*state
;
550 result
= tevent_req_create(mem_ctx
, &state
,
551 struct open_socket_out_state
);
552 if (result
== NULL
) {
558 state
->wait_usec
= 10000;
561 state
->fd
= socket(state
->ss
.ss_family
, SOCK_STREAM
, 0);
562 if (state
->fd
== -1) {
563 status
= map_nt_error_from_unix(errno
);
566 talloc_set_destructor(state
, open_socket_out_state_destructor
);
568 if (!tevent_req_set_endtime(
569 result
, ev
, timeval_current_ofs_msec(timeout
))) {
573 #if defined(HAVE_IPV6)
574 if (pss
->ss_family
== AF_INET6
) {
575 struct sockaddr_in6
*psa6
;
576 psa6
= (struct sockaddr_in6
*)&state
->ss
;
577 psa6
->sin6_port
= htons(port
);
578 if (psa6
->sin6_scope_id
== 0
579 && IN6_IS_ADDR_LINKLOCAL(&psa6
->sin6_addr
)) {
580 setup_linklocal_scope_id(
581 (struct sockaddr
*)&(state
->ss
));
583 state
->salen
= sizeof(struct sockaddr_in6
);
586 if (pss
->ss_family
== AF_INET
) {
587 struct sockaddr_in
*psa
;
588 psa
= (struct sockaddr_in
*)&state
->ss
;
589 psa
->sin_port
= htons(port
);
590 state
->salen
= sizeof(struct sockaddr_in
);
593 if (pss
->ss_family
== AF_UNIX
) {
594 state
->salen
= sizeof(struct sockaddr_un
);
597 print_sockaddr(addr
, sizeof(addr
), &state
->ss
);
598 DEBUG(3,("Connecting to %s at port %u\n", addr
, (unsigned int)port
));
600 subreq
= async_connect_send(state
, state
->ev
, state
->fd
,
601 (struct sockaddr
*)&state
->ss
,
602 state
->salen
, NULL
, NULL
, NULL
);
604 || !tevent_req_set_endtime(
606 timeval_current_ofs(0, state
->wait_usec
))) {
609 tevent_req_set_callback(subreq
, open_socket_out_connected
, result
);
613 tevent_req_nterror(result
, status
);
614 return tevent_req_post(result
, ev
);
620 static void open_socket_out_connected(struct tevent_req
*subreq
)
622 struct tevent_req
*req
=
623 tevent_req_callback_data(subreq
, struct tevent_req
);
624 struct open_socket_out_state
*state
=
625 tevent_req_data(req
, struct open_socket_out_state
);
629 ret
= async_connect_recv(subreq
, &sys_errno
);
632 tevent_req_done(req
);
638 (sys_errno
== ETIMEDOUT
) ||
640 (sys_errno
== EINPROGRESS
) ||
641 (sys_errno
== EALREADY
) ||
642 (sys_errno
== EAGAIN
)) {
648 if (state
->wait_usec
< 250000) {
649 state
->wait_usec
*= 1.5;
652 subreq
= async_connect_send(state
, state
->ev
, state
->fd
,
653 (struct sockaddr
*)&state
->ss
,
654 state
->salen
, NULL
, NULL
, NULL
);
655 if (tevent_req_nomem(subreq
, req
)) {
658 if (!tevent_req_set_endtime(
660 timeval_current_ofs_usec(state
->wait_usec
))) {
661 tevent_req_nterror(req
, NT_STATUS_NO_MEMORY
);
664 tevent_req_set_callback(subreq
, open_socket_out_connected
, req
);
669 if (sys_errno
== EISCONN
) {
670 tevent_req_done(req
);
676 tevent_req_nterror(req
, map_nt_error_from_unix(sys_errno
));
679 NTSTATUS
open_socket_out_recv(struct tevent_req
*req
, int *pfd
)
681 struct open_socket_out_state
*state
=
682 tevent_req_data(req
, struct open_socket_out_state
);
685 if (tevent_req_is_nterror(req
, &status
)) {
694 * @brief open a socket
696 * @param pss a struct sockaddr_storage defining the address to connect to
697 * @param port to connect to
698 * @param timeout in MILLISECONDS
699 * @param pfd file descriptor returned
701 * @return NTSTATUS code
703 NTSTATUS
open_socket_out(const struct sockaddr_storage
*pss
, uint16_t port
,
704 int timeout
, int *pfd
)
706 TALLOC_CTX
*frame
= talloc_stackframe();
707 struct tevent_context
*ev
;
708 struct tevent_req
*req
;
709 NTSTATUS status
= NT_STATUS_NO_MEMORY
;
711 ev
= samba_tevent_context_init(frame
);
716 req
= open_socket_out_send(frame
, ev
, pss
, port
, timeout
);
720 if (!tevent_req_poll(req
, ev
)) {
721 status
= NT_STATUS_INTERNAL_ERROR
;
724 status
= open_socket_out_recv(req
, pfd
);
730 struct open_socket_out_defer_state
{
731 struct tevent_context
*ev
;
732 struct sockaddr_storage ss
;
738 static void open_socket_out_defer_waited(struct tevent_req
*subreq
);
739 static void open_socket_out_defer_connected(struct tevent_req
*subreq
);
741 struct tevent_req
*open_socket_out_defer_send(TALLOC_CTX
*mem_ctx
,
742 struct tevent_context
*ev
,
743 struct timeval wait_time
,
744 const struct sockaddr_storage
*pss
,
748 struct tevent_req
*req
, *subreq
;
749 struct open_socket_out_defer_state
*state
;
751 req
= tevent_req_create(mem_ctx
, &state
,
752 struct open_socket_out_defer_state
);
759 state
->timeout
= timeout
;
761 subreq
= tevent_wakeup_send(
763 timeval_current_ofs(wait_time
.tv_sec
, wait_time
.tv_usec
));
764 if (subreq
== NULL
) {
767 tevent_req_set_callback(subreq
, open_socket_out_defer_waited
, req
);
774 static void open_socket_out_defer_waited(struct tevent_req
*subreq
)
776 struct tevent_req
*req
= tevent_req_callback_data(
777 subreq
, struct tevent_req
);
778 struct open_socket_out_defer_state
*state
= tevent_req_data(
779 req
, struct open_socket_out_defer_state
);
782 ret
= tevent_wakeup_recv(subreq
);
785 tevent_req_nterror(req
, NT_STATUS_INTERNAL_ERROR
);
789 subreq
= open_socket_out_send(state
, state
->ev
, &state
->ss
,
790 state
->port
, state
->timeout
);
791 if (tevent_req_nomem(subreq
, req
)) {
794 tevent_req_set_callback(subreq
, open_socket_out_defer_connected
, req
);
797 static void open_socket_out_defer_connected(struct tevent_req
*subreq
)
799 struct tevent_req
*req
= tevent_req_callback_data(
800 subreq
, struct tevent_req
);
801 struct open_socket_out_defer_state
*state
= tevent_req_data(
802 req
, struct open_socket_out_defer_state
);
805 status
= open_socket_out_recv(subreq
, &state
->fd
);
807 if (!NT_STATUS_IS_OK(status
)) {
808 tevent_req_nterror(req
, status
);
811 tevent_req_done(req
);
814 NTSTATUS
open_socket_out_defer_recv(struct tevent_req
*req
, int *pfd
)
816 struct open_socket_out_defer_state
*state
= tevent_req_data(
817 req
, struct open_socket_out_defer_state
);
820 if (tevent_req_is_nterror(req
, &status
)) {
828 /****************************************************************************
829 Open a connected UDP socket to host on port
830 **************************************************************************/
832 int open_udp_socket(const char *host
, int port
)
834 struct sockaddr_storage ss
;
838 if (!interpret_string_addr(&ss
, host
, 0)) {
839 DEBUG(10,("open_udp_socket: can't resolve name %s\n",
844 res
= socket(ss
.ss_family
, SOCK_DGRAM
, 0);
849 #if defined(HAVE_IPV6)
850 if (ss
.ss_family
== AF_INET6
) {
851 struct sockaddr_in6
*psa6
;
852 psa6
= (struct sockaddr_in6
*)&ss
;
853 psa6
->sin6_port
= htons(port
);
854 if (psa6
->sin6_scope_id
== 0
855 && IN6_IS_ADDR_LINKLOCAL(&psa6
->sin6_addr
)) {
856 setup_linklocal_scope_id(
857 (struct sockaddr
*)&ss
);
859 salen
= sizeof(struct sockaddr_in6
);
862 if (ss
.ss_family
== AF_INET
) {
863 struct sockaddr_in
*psa
;
864 psa
= (struct sockaddr_in
*)&ss
;
865 psa
->sin_port
= htons(port
);
866 salen
= sizeof(struct sockaddr_in
);
868 DEBUG(1, ("unknown socket family %d", ss
.ss_family
));
873 if (connect(res
, (struct sockaddr
*)&ss
, salen
)) {
881 /*******************************************************************
882 Return the IP addr of the remote end of a socket as a string.
883 Optionally return the struct sockaddr_storage.
884 ******************************************************************/
886 static const char *get_peer_addr_internal(int fd
,
889 struct sockaddr
*pss
,
892 struct sockaddr_storage ss
;
893 socklen_t length
= sizeof(ss
);
895 strlcpy(addr_buf
,"0.0.0.0",addr_buf_len
);
902 pss
= (struct sockaddr
*)&ss
;
906 if (getpeername(fd
, (struct sockaddr
*)pss
, plength
) < 0) {
907 int level
= (errno
== ENOTCONN
) ? 2 : 0;
908 DEBUG(level
, ("getpeername failed. Error was %s\n",
913 print_sockaddr_len(addr_buf
,
920 /*******************************************************************
921 Matchname - determine if host name matches IP address. Used to
922 confirm a hostname lookup to prevent spoof attacks.
923 ******************************************************************/
925 static bool matchname(const char *remotehost
,
926 const struct sockaddr
*pss
,
929 struct addrinfo
*res
= NULL
;
930 struct addrinfo
*ailist
= NULL
;
931 char addr_buf
[INET6_ADDRSTRLEN
];
932 bool ret
= interpret_string_addr_internal(&ailist
,
934 AI_ADDRCONFIG
|AI_CANONNAME
);
936 if (!ret
|| ailist
== NULL
) {
937 DEBUG(3,("matchname: getaddrinfo failed for "
940 gai_strerror(ret
) ));
945 * Make sure that getaddrinfo() returns the "correct" host name.
948 if (ailist
->ai_canonname
== NULL
||
949 (!strequal(remotehost
, ailist
->ai_canonname
) &&
950 !strequal(remotehost
, "localhost"))) {
951 DEBUG(0,("matchname: host name/name mismatch: %s != %s\n",
953 ailist
->ai_canonname
?
954 ailist
->ai_canonname
: "(NULL)"));
955 freeaddrinfo(ailist
);
959 /* Look up the host address in the address list we just got. */
960 for (res
= ailist
; res
; res
= res
->ai_next
) {
964 if (sockaddr_equal((const struct sockaddr
*)res
->ai_addr
,
965 (const struct sockaddr
*)pss
)) {
966 freeaddrinfo(ailist
);
972 * The host name does not map to the original host address. Perhaps
973 * someone has compromised a name server. More likely someone botched
974 * it, but that could be dangerous, too.
977 DEBUG(0,("matchname: host name/address mismatch: %s != %s\n",
978 print_sockaddr_len(addr_buf
,
982 ailist
->ai_canonname
? ailist
->ai_canonname
: "(NULL)"));
985 freeaddrinfo(ailist
);
990 /*******************************************************************
991 Deal with the singleton cache.
992 ******************************************************************/
994 struct name_addr_pair
{
995 struct sockaddr_storage ss
;
999 /*******************************************************************
1000 Lookup a name/addr pair. Returns memory allocated from memcache.
1001 ******************************************************************/
1003 static bool lookup_nc(struct name_addr_pair
*nc
)
1009 if (!memcache_lookup(
1010 NULL
, SINGLETON_CACHE
,
1011 data_blob_string_const_null("get_peer_name"),
1016 memcpy(&nc
->ss
, tmp
.data
, sizeof(nc
->ss
));
1017 nc
->name
= (const char *)tmp
.data
+ sizeof(nc
->ss
);
1021 /*******************************************************************
1022 Save a name/addr pair.
1023 ******************************************************************/
1025 static void store_nc(const struct name_addr_pair
*nc
)
1028 size_t namelen
= strlen(nc
->name
);
1030 tmp
= data_blob(NULL
, sizeof(nc
->ss
) + namelen
+ 1);
1034 memcpy(tmp
.data
, &nc
->ss
, sizeof(nc
->ss
));
1035 memcpy(tmp
.data
+sizeof(nc
->ss
), nc
->name
, namelen
+1);
1037 memcache_add(NULL
, SINGLETON_CACHE
,
1038 data_blob_string_const_null("get_peer_name"),
1040 data_blob_free(&tmp
);
1043 /*******************************************************************
1044 Return the IP addr of the remote end of a socket as a string.
1045 ******************************************************************/
1047 const char *get_peer_addr(int fd
, char *addr
, size_t addr_len
)
1049 return get_peer_addr_internal(fd
, addr
, addr_len
, NULL
, NULL
);
1052 int get_remote_hostname(const struct tsocket_address
*remote_address
,
1054 TALLOC_CTX
*mem_ctx
)
1056 char name_buf
[MAX_DNS_NAME_LENGTH
];
1057 char tmp_name
[MAX_DNS_NAME_LENGTH
];
1058 struct name_addr_pair nc
;
1059 struct sockaddr_storage ss
;
1063 if (!lp_hostname_lookups()) {
1064 nc
.name
= tsocket_address_inet_addr_string(remote_address
,
1066 if (nc
.name
== NULL
) {
1070 len
= tsocket_address_bsd_sockaddr(remote_address
,
1071 (struct sockaddr
*) &nc
.ss
,
1072 sizeof(struct sockaddr_storage
));
1080 if (nc
.name
== NULL
) {
1081 *name
= talloc_strdup(mem_ctx
, "UNKNOWN");
1083 *name
= talloc_strdup(mem_ctx
, nc
.name
);
1092 len
= tsocket_address_bsd_sockaddr(remote_address
,
1093 (struct sockaddr
*) &ss
,
1094 sizeof(struct sockaddr_storage
));
1099 /* it might be the same as the last one - save some DNS work */
1100 if (sockaddr_equal((struct sockaddr
*)&ss
, (struct sockaddr
*)&nc
.ss
)) {
1101 if (nc
.name
== NULL
) {
1102 *name
= talloc_strdup(mem_ctx
, "UNKNOWN");
1104 *name
= talloc_strdup(mem_ctx
, nc
.name
);
1109 /* Look up the remote host name. */
1110 rc
= sys_getnameinfo((struct sockaddr
*) &ss
,
1120 p
= tsocket_address_inet_addr_string(remote_address
, mem_ctx
);
1125 DEBUG(1,("getnameinfo failed for %s with error %s\n",
1128 strlcpy(name_buf
, p
, sizeof(name_buf
));
1132 if (!matchname(name_buf
, (struct sockaddr
*)&ss
, len
)) {
1133 DEBUG(0,("matchname failed on %s\n", name_buf
));
1134 strlcpy(name_buf
, "UNKNOWN", sizeof(name_buf
));
1138 strlcpy(tmp_name
, name_buf
, sizeof(tmp_name
));
1139 alpha_strcpy(name_buf
, tmp_name
, "_-.", sizeof(name_buf
));
1140 if (strstr(name_buf
,"..")) {
1141 strlcpy(name_buf
, "UNKNOWN", sizeof(name_buf
));
1150 if (nc
.name
== NULL
) {
1151 *name
= talloc_strdup(mem_ctx
, "UNKOWN");
1153 *name
= talloc_strdup(mem_ctx
, nc
.name
);
1159 /*******************************************************************
1160 Create protected unix domain socket.
1162 Some unixes cannot set permissions on a ux-dom-sock, so we
1163 have to make sure that the directory contains the protection
1164 permissions instead.
1165 ******************************************************************/
1167 int create_pipe_sock(const char *socket_dir
,
1168 const char *socket_name
,
1171 #ifdef HAVE_UNIXSOCKET
1172 struct sockaddr_un sunaddr
;
1178 old_umask
= umask(0);
1180 ok
= directory_create_or_exist_strict(socket_dir
,
1187 /* Create the socket file */
1188 sock
= socket(AF_UNIX
, SOCK_STREAM
, 0);
1191 DEBUG(0, ("create_pipe_sock: socket error %s\n",
1196 if (asprintf(&path
, "%s/%s", socket_dir
, socket_name
) == -1) {
1201 memset(&sunaddr
, 0, sizeof(sunaddr
));
1202 sunaddr
.sun_family
= AF_UNIX
;
1203 strlcpy(sunaddr
.sun_path
, path
, sizeof(sunaddr
.sun_path
));
1205 if (bind(sock
, (struct sockaddr
*)&sunaddr
, sizeof(sunaddr
)) == -1) {
1206 DEBUG(0, ("bind failed on pipe socket %s: %s\n", path
,
1225 DEBUG(0, ("create_pipe_sock: No Unix sockets on this system\n"));
1227 #endif /* HAVE_UNIXSOCKET */
1230 /****************************************************************************
1231 Get my own canonical name, including domain.
1232 ****************************************************************************/
1234 const char *get_mydnsfullname(void)
1236 struct addrinfo
*res
= NULL
;
1237 char my_hostname
[HOST_NAME_MAX
];
1241 if (memcache_lookup(NULL
, SINGLETON_CACHE
,
1242 data_blob_string_const_null("get_mydnsfullname"),
1244 SMB_ASSERT(tmp
.length
> 0);
1245 return (const char *)tmp
.data
;
1248 /* get my host name */
1249 if (gethostname(my_hostname
, sizeof(my_hostname
)) == -1) {
1250 DEBUG(0,("get_mydnsfullname: gethostname failed\n"));
1254 /* Ensure null termination. */
1255 my_hostname
[sizeof(my_hostname
)-1] = '\0';
1257 ret
= interpret_string_addr_internal(&res
,
1259 AI_ADDRCONFIG
|AI_CANONNAME
);
1261 if (!ret
|| res
== NULL
) {
1262 DEBUG(3,("get_mydnsfullname: getaddrinfo failed for "
1265 gai_strerror(ret
) ));
1270 * Make sure that getaddrinfo() returns the "correct" host name.
1273 if (res
->ai_canonname
== NULL
) {
1274 DEBUG(3,("get_mydnsfullname: failed to get "
1275 "canonical name for %s\n",
1281 /* This copies the data, so we must do a lookup
1282 * afterwards to find the value to return.
1285 memcache_add(NULL
, SINGLETON_CACHE
,
1286 data_blob_string_const_null("get_mydnsfullname"),
1287 data_blob_string_const_null(res
->ai_canonname
));
1289 if (!memcache_lookup(NULL
, SINGLETON_CACHE
,
1290 data_blob_string_const_null("get_mydnsfullname"),
1292 tmp
= data_blob_talloc(talloc_tos(), res
->ai_canonname
,
1293 strlen(res
->ai_canonname
) + 1);
1298 return (const char *)tmp
.data
;
1301 /************************************************************
1302 Is this my ip address ?
1303 ************************************************************/
1305 static bool is_my_ipaddr(const char *ipaddr_str
)
1307 struct sockaddr_storage ss
;
1308 struct iface_struct
*nics
;
1311 if (!interpret_string_addr(&ss
, ipaddr_str
, AI_NUMERICHOST
)) {
1315 if (is_zero_addr(&ss
)) {
1319 if (ismyaddr((struct sockaddr
*)&ss
) ||
1320 is_loopback_addr((struct sockaddr
*)&ss
)) {
1324 n
= get_interfaces(talloc_tos(), &nics
);
1325 for (i
=0; i
<n
; i
++) {
1326 if (sockaddr_equal((struct sockaddr
*)&nics
[i
].ip
, (struct sockaddr
*)&ss
)) {
1335 /************************************************************
1337 ************************************************************/
1339 bool is_myname_or_ipaddr(const char *s
)
1341 TALLOC_CTX
*ctx
= talloc_tos();
1343 const char *dnsname
;
1344 char *servername
= NULL
;
1350 /* Santize the string from '\\name' */
1351 name
= talloc_strdup(ctx
, s
);
1356 servername
= strrchr_m(name
, '\\' );
1363 /* Optimize for the common case */
1364 if (strequal(servername
, lp_netbios_name())) {
1368 /* Check for an alias */
1369 if (is_myname(servername
)) {
1373 /* Check for loopback */
1374 if (strequal(servername
, "127.0.0.1") ||
1375 strequal(servername
, "::1")) {
1379 if (strequal(servername
, "localhost")) {
1383 /* Maybe it's my dns name */
1384 dnsname
= get_mydnsfullname();
1385 if (dnsname
&& strequal(servername
, dnsname
)) {
1389 /* Maybe its an IP address? */
1390 if (is_ipaddress(servername
)) {
1391 return is_my_ipaddr(servername
);
1394 /* Handle possible CNAME records - convert to an IP addr. list. */
1396 /* Use DNS to resolve the name, check all addresses. */
1397 struct addrinfo
*p
= NULL
;
1398 struct addrinfo
*res
= NULL
;
1400 if (!interpret_string_addr_internal(&res
,
1406 for (p
= res
; p
; p
= p
->ai_next
) {
1407 char addr
[INET6_ADDRSTRLEN
];
1408 struct sockaddr_storage ss
;
1411 memcpy(&ss
, p
->ai_addr
, p
->ai_addrlen
);
1412 print_sockaddr(addr
,
1415 if (is_my_ipaddr(addr
)) {
1427 struct getaddrinfo_state
{
1429 const char *service
;
1430 const struct addrinfo
*hints
;
1431 struct addrinfo
*res
;
1435 static void getaddrinfo_do(void *private_data
);
1436 static void getaddrinfo_done(struct tevent_req
*subreq
);
1438 struct tevent_req
*getaddrinfo_send(TALLOC_CTX
*mem_ctx
,
1439 struct tevent_context
*ev
,
1440 struct fncall_context
*ctx
,
1442 const char *service
,
1443 const struct addrinfo
*hints
)
1445 struct tevent_req
*req
, *subreq
;
1446 struct getaddrinfo_state
*state
;
1448 req
= tevent_req_create(mem_ctx
, &state
, struct getaddrinfo_state
);
1454 state
->service
= service
;
1455 state
->hints
= hints
;
1457 subreq
= fncall_send(state
, ev
, ctx
, getaddrinfo_do
, state
);
1458 if (tevent_req_nomem(subreq
, req
)) {
1459 return tevent_req_post(req
, ev
);
1461 tevent_req_set_callback(subreq
, getaddrinfo_done
, req
);
1465 static void getaddrinfo_do(void *private_data
)
1467 struct getaddrinfo_state
*state
=
1468 (struct getaddrinfo_state
*)private_data
;
1470 state
->ret
= getaddrinfo(state
->node
, state
->service
, state
->hints
,
1474 static void getaddrinfo_done(struct tevent_req
*subreq
)
1476 struct tevent_req
*req
= tevent_req_callback_data(
1477 subreq
, struct tevent_req
);
1480 ret
= fncall_recv(subreq
, &err
);
1481 TALLOC_FREE(subreq
);
1483 tevent_req_error(req
, err
);
1486 tevent_req_done(req
);
1489 int getaddrinfo_recv(struct tevent_req
*req
, struct addrinfo
**res
)
1491 struct getaddrinfo_state
*state
= tevent_req_data(
1492 req
, struct getaddrinfo_state
);
1495 if (tevent_req_is_unix_error(req
, &err
)) {
1503 if (state
->ret
== 0) {
1509 int poll_one_fd(int fd
, int events
, int timeout
, int *revents
)
1515 pfd
.events
= events
;
1517 ret
= poll(&pfd
, 1, timeout
);
1520 * Assign whatever poll did, even in the ret<=0 case.
1522 *revents
= pfd
.revents
;
1527 int poll_intr_one_fd(int fd
, int events
, int timeout
, int *revents
)
1533 pfd
.events
= events
;
1535 ret
= sys_poll_intr(&pfd
, 1, timeout
);
1540 *revents
= pfd
.revents
;