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"
24 #include "../lib/util/memcache.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 uint8_t *iov_buf(TALLOC_CTX
*mem_ctx
, const struct iovec
*iov
, int iovcnt
)
228 buflen
= iov_buflen(iov
, iovcnt
);
232 buf
= talloc_array(mem_ctx
, uint8_t, buflen
);
238 for (i
=0; i
<iovcnt
; i
++) {
239 size_t len
= iov
[i
].iov_len
;
241 memcpy(p
, iov
[i
].iov_base
, len
);
247 /****************************************************************************
248 Write all data from an iov array
249 NB. This can be called with a non-socket fd, don't add dependencies
251 ****************************************************************************/
253 ssize_t
write_data_iov(int fd
, const struct iovec
*orig_iov
, int iovcnt
)
258 struct iovec iov_copy
[iovcnt
];
261 to_send
= iov_buflen(orig_iov
, iovcnt
);
267 thistime
= sys_writev(fd
, orig_iov
, iovcnt
);
268 if ((thistime
<= 0) || (thistime
== to_send
)) {
274 * We could not send everything in one call. Make a copy of iov that
275 * we can mess with. We keep a copy of the array start in iov_copy for
276 * the TALLOC_FREE, because we're going to modify iov later on,
277 * discarding elements.
280 memcpy(iov_copy
, orig_iov
, sizeof(struct iovec
) * iovcnt
);
283 while (sent
< to_send
) {
285 * We have to discard "thistime" bytes from the beginning
286 * iov array, "thistime" contains the number of bytes sent
289 while (thistime
> 0) {
290 if (thistime
< iov
[0].iov_len
) {
292 (char *)iov
[0].iov_base
+ thistime
;
293 iov
[0].iov_base
= (void *)new_base
;
294 iov
[0].iov_len
-= thistime
;
297 thistime
-= iov
[0].iov_len
;
302 thistime
= sys_writev(fd
, iov
, iovcnt
);
312 /****************************************************************************
314 NB. This can be called with a non-socket fd, don't add dependencies
316 ****************************************************************************/
318 ssize_t
write_data(int fd
, const char *buffer
, size_t N
)
322 iov
.iov_base
= discard_const_p(void, buffer
);
324 return write_data_iov(fd
, &iov
, 1);
327 /****************************************************************************
328 Send a keepalive packet (rfc1002).
329 ****************************************************************************/
331 bool send_keepalive(int client
)
333 unsigned char buf
[4];
335 buf
[0] = NBSSkeepalive
;
336 buf
[1] = buf
[2] = buf
[3] = 0;
338 return(write_data(client
,(char *)buf
,4) == 4);
341 /****************************************************************************
342 Read 4 bytes of a smb packet and return the smb length of the packet.
343 Store the result in the buffer.
344 This version of the function will return a length of zero on receiving
346 Timeout is in milliseconds.
347 ****************************************************************************/
349 NTSTATUS
read_smb_length_return_keepalive(int fd
, char *inbuf
,
350 unsigned int timeout
,
356 status
= read_fd_with_timeout(fd
, inbuf
, 4, 4, timeout
, NULL
);
358 if (!NT_STATUS_IS_OK(status
)) {
362 *len
= smb_len(inbuf
);
363 msg_type
= CVAL(inbuf
,0);
365 if (msg_type
== NBSSkeepalive
) {
366 DEBUG(5,("Got keepalive packet\n"));
369 DEBUG(10,("got smb length of %lu\n",(unsigned long)(*len
)));
374 /****************************************************************************
375 Read an smb from a fd.
376 The timeout is in milliseconds.
377 This function will return on receipt of a session keepalive packet.
378 maxlen is the max number of bytes to return, not including the 4 byte
379 length. If zero it means buflen limit.
380 Doesn't check the MAC on signed packets.
381 ****************************************************************************/
383 NTSTATUS
receive_smb_raw(int fd
, char *buffer
, size_t buflen
, unsigned int timeout
,
384 size_t maxlen
, size_t *p_len
)
389 status
= read_smb_length_return_keepalive(fd
,buffer
,timeout
,&len
);
391 if (!NT_STATUS_IS_OK(status
)) {
392 DEBUG(0, ("read_fd_with_timeout failed, read "
393 "error = %s.\n", nt_errstr(status
)));
398 DEBUG(0,("Invalid packet length! (%lu bytes).\n",
399 (unsigned long)len
));
400 return NT_STATUS_INVALID_PARAMETER
;
405 len
= MIN(len
,maxlen
);
408 status
= read_fd_with_timeout(
409 fd
, buffer
+4, len
, len
, timeout
, &len
);
411 if (!NT_STATUS_IS_OK(status
)) {
412 DEBUG(0, ("read_fd_with_timeout failed, read error = "
413 "%s.\n", nt_errstr(status
)));
417 /* not all of samba3 properly checks for packet-termination
418 * of strings. This ensures that we don't run off into
420 SSVAL(buffer
+4,len
, 0);
427 /****************************************************************************
428 Open a socket of the specified type, port, and address for incoming data.
429 ****************************************************************************/
431 int open_socket_in(int type
,
434 const struct sockaddr_storage
*psock
,
437 struct sockaddr_storage sock
;
439 socklen_t slen
= sizeof(struct sockaddr_in
);
443 #if defined(HAVE_IPV6)
444 if (sock
.ss_family
== AF_INET6
) {
445 ((struct sockaddr_in6
*)&sock
)->sin6_port
= htons(port
);
446 slen
= sizeof(struct sockaddr_in6
);
449 if (sock
.ss_family
== AF_INET
) {
450 ((struct sockaddr_in
*)&sock
)->sin_port
= htons(port
);
453 res
= socket(sock
.ss_family
, type
, 0 );
456 dbgtext( "open_socket_in(): socket() call failed: " );
457 dbgtext( "%s\n", strerror( errno
) );
462 /* This block sets/clears the SO_REUSEADDR and possibly SO_REUSEPORT. */
464 int val
= rebind
? 1 : 0;
465 if( setsockopt(res
,SOL_SOCKET
,SO_REUSEADDR
,
466 (char *)&val
,sizeof(val
)) == -1 ) {
467 if( DEBUGLVL( dlevel
) ) {
468 dbgtext( "open_socket_in(): setsockopt: " );
469 dbgtext( "SO_REUSEADDR = %s ",
470 val
?"true":"false" );
471 dbgtext( "on port %d failed ", port
);
472 dbgtext( "with error = %s\n", strerror(errno
) );
476 if( setsockopt(res
,SOL_SOCKET
,SO_REUSEPORT
,
477 (char *)&val
,sizeof(val
)) == -1 ) {
478 if( DEBUGLVL( dlevel
) ) {
479 dbgtext( "open_socket_in(): setsockopt: ");
480 dbgtext( "SO_REUSEPORT = %s ",
482 dbgtext( "on port %d failed ", port
);
483 dbgtext( "with error = %s\n", strerror(errno
));
486 #endif /* SO_REUSEPORT */
491 * As IPV6_V6ONLY is the default on some systems,
492 * we better try to be consistent and always use it.
494 * This also avoids using IPv4 via AF_INET6 sockets
495 * and makes sure %I never resolves to a '::ffff:192.168.0.1'
498 if (sock
.ss_family
== AF_INET6
) {
502 ret
= setsockopt(res
, IPPROTO_IPV6
, IPV6_V6ONLY
,
503 (const void *)&val
, sizeof(val
));
506 dbgtext("open_socket_in(): IPV6_ONLY failed: ");
507 dbgtext("%s\n", strerror(errno
));
515 /* now we've got a socket - we need to bind it */
516 if (bind(res
, (struct sockaddr
*)&sock
, slen
) == -1 ) {
517 if( DEBUGLVL(dlevel
) && (port
== NMB_PORT
||
518 port
== NBT_SMB_PORT
||
519 port
== TCP_SMB_PORT
) ) {
520 char addr
[INET6_ADDRSTRLEN
];
521 print_sockaddr(addr
, sizeof(addr
),
523 dbgtext( "bind failed on port %d ", port
);
524 dbgtext( "socket_addr = %s.\n", addr
);
525 dbgtext( "Error = %s\n", strerror(errno
));
531 DEBUG( 10, ( "bind succeeded on port %d\n", port
) );
535 struct open_socket_out_state
{
537 struct tevent_context
*ev
;
538 struct sockaddr_storage ss
;
544 static void open_socket_out_connected(struct tevent_req
*subreq
);
546 static int open_socket_out_state_destructor(struct open_socket_out_state
*s
)
554 /****************************************************************************
555 Create an outgoing socket. timeout is in milliseconds.
556 **************************************************************************/
558 struct tevent_req
*open_socket_out_send(TALLOC_CTX
*mem_ctx
,
559 struct tevent_context
*ev
,
560 const struct sockaddr_storage
*pss
,
564 char addr
[INET6_ADDRSTRLEN
];
565 struct tevent_req
*result
, *subreq
;
566 struct open_socket_out_state
*state
;
569 result
= tevent_req_create(mem_ctx
, &state
,
570 struct open_socket_out_state
);
571 if (result
== NULL
) {
577 state
->wait_usec
= 10000;
580 state
->fd
= socket(state
->ss
.ss_family
, SOCK_STREAM
, 0);
581 if (state
->fd
== -1) {
582 status
= map_nt_error_from_unix(errno
);
585 talloc_set_destructor(state
, open_socket_out_state_destructor
);
587 if (!tevent_req_set_endtime(
588 result
, ev
, timeval_current_ofs_msec(timeout
))) {
592 #if defined(HAVE_IPV6)
593 if (pss
->ss_family
== AF_INET6
) {
594 struct sockaddr_in6
*psa6
;
595 psa6
= (struct sockaddr_in6
*)&state
->ss
;
596 psa6
->sin6_port
= htons(port
);
597 if (psa6
->sin6_scope_id
== 0
598 && IN6_IS_ADDR_LINKLOCAL(&psa6
->sin6_addr
)) {
599 setup_linklocal_scope_id(
600 (struct sockaddr
*)&(state
->ss
));
602 state
->salen
= sizeof(struct sockaddr_in6
);
605 if (pss
->ss_family
== AF_INET
) {
606 struct sockaddr_in
*psa
;
607 psa
= (struct sockaddr_in
*)&state
->ss
;
608 psa
->sin_port
= htons(port
);
609 state
->salen
= sizeof(struct sockaddr_in
);
612 if (pss
->ss_family
== AF_UNIX
) {
613 state
->salen
= sizeof(struct sockaddr_un
);
616 print_sockaddr(addr
, sizeof(addr
), &state
->ss
);
617 DEBUG(3,("Connecting to %s at port %u\n", addr
, (unsigned int)port
));
619 subreq
= async_connect_send(state
, state
->ev
, state
->fd
,
620 (struct sockaddr
*)&state
->ss
,
621 state
->salen
, NULL
, NULL
, NULL
);
623 || !tevent_req_set_endtime(
625 timeval_current_ofs(0, state
->wait_usec
))) {
628 tevent_req_set_callback(subreq
, open_socket_out_connected
, result
);
632 tevent_req_nterror(result
, status
);
633 return tevent_req_post(result
, ev
);
639 static void open_socket_out_connected(struct tevent_req
*subreq
)
641 struct tevent_req
*req
=
642 tevent_req_callback_data(subreq
, struct tevent_req
);
643 struct open_socket_out_state
*state
=
644 tevent_req_data(req
, struct open_socket_out_state
);
648 ret
= async_connect_recv(subreq
, &sys_errno
);
651 tevent_req_done(req
);
657 (sys_errno
== ETIMEDOUT
) ||
659 (sys_errno
== EINPROGRESS
) ||
660 (sys_errno
== EALREADY
) ||
661 (sys_errno
== EAGAIN
)) {
667 if (state
->wait_usec
< 250000) {
668 state
->wait_usec
*= 1.5;
671 subreq
= async_connect_send(state
, state
->ev
, state
->fd
,
672 (struct sockaddr
*)&state
->ss
,
673 state
->salen
, NULL
, NULL
, NULL
);
674 if (tevent_req_nomem(subreq
, req
)) {
677 if (!tevent_req_set_endtime(
679 timeval_current_ofs_usec(state
->wait_usec
))) {
680 tevent_req_nterror(req
, NT_STATUS_NO_MEMORY
);
683 tevent_req_set_callback(subreq
, open_socket_out_connected
, req
);
688 if (sys_errno
== EISCONN
) {
689 tevent_req_done(req
);
695 tevent_req_nterror(req
, map_nt_error_from_unix(sys_errno
));
698 NTSTATUS
open_socket_out_recv(struct tevent_req
*req
, int *pfd
)
700 struct open_socket_out_state
*state
=
701 tevent_req_data(req
, struct open_socket_out_state
);
704 if (tevent_req_is_nterror(req
, &status
)) {
713 * @brief open a socket
715 * @param pss a struct sockaddr_storage defining the address to connect to
716 * @param port to connect to
717 * @param timeout in MILLISECONDS
718 * @param pfd file descriptor returned
720 * @return NTSTATUS code
722 NTSTATUS
open_socket_out(const struct sockaddr_storage
*pss
, uint16_t port
,
723 int timeout
, int *pfd
)
725 TALLOC_CTX
*frame
= talloc_stackframe();
726 struct tevent_context
*ev
;
727 struct tevent_req
*req
;
728 NTSTATUS status
= NT_STATUS_NO_MEMORY
;
730 ev
= samba_tevent_context_init(frame
);
735 req
= open_socket_out_send(frame
, ev
, pss
, port
, timeout
);
739 if (!tevent_req_poll(req
, ev
)) {
740 status
= NT_STATUS_INTERNAL_ERROR
;
743 status
= open_socket_out_recv(req
, pfd
);
749 struct open_socket_out_defer_state
{
750 struct tevent_context
*ev
;
751 struct sockaddr_storage ss
;
757 static void open_socket_out_defer_waited(struct tevent_req
*subreq
);
758 static void open_socket_out_defer_connected(struct tevent_req
*subreq
);
760 struct tevent_req
*open_socket_out_defer_send(TALLOC_CTX
*mem_ctx
,
761 struct tevent_context
*ev
,
762 struct timeval wait_time
,
763 const struct sockaddr_storage
*pss
,
767 struct tevent_req
*req
, *subreq
;
768 struct open_socket_out_defer_state
*state
;
770 req
= tevent_req_create(mem_ctx
, &state
,
771 struct open_socket_out_defer_state
);
778 state
->timeout
= timeout
;
780 subreq
= tevent_wakeup_send(
782 timeval_current_ofs(wait_time
.tv_sec
, wait_time
.tv_usec
));
783 if (subreq
== NULL
) {
786 tevent_req_set_callback(subreq
, open_socket_out_defer_waited
, req
);
793 static void open_socket_out_defer_waited(struct tevent_req
*subreq
)
795 struct tevent_req
*req
= tevent_req_callback_data(
796 subreq
, struct tevent_req
);
797 struct open_socket_out_defer_state
*state
= tevent_req_data(
798 req
, struct open_socket_out_defer_state
);
801 ret
= tevent_wakeup_recv(subreq
);
804 tevent_req_nterror(req
, NT_STATUS_INTERNAL_ERROR
);
808 subreq
= open_socket_out_send(state
, state
->ev
, &state
->ss
,
809 state
->port
, state
->timeout
);
810 if (tevent_req_nomem(subreq
, req
)) {
813 tevent_req_set_callback(subreq
, open_socket_out_defer_connected
, req
);
816 static void open_socket_out_defer_connected(struct tevent_req
*subreq
)
818 struct tevent_req
*req
= tevent_req_callback_data(
819 subreq
, struct tevent_req
);
820 struct open_socket_out_defer_state
*state
= tevent_req_data(
821 req
, struct open_socket_out_defer_state
);
824 status
= open_socket_out_recv(subreq
, &state
->fd
);
826 if (!NT_STATUS_IS_OK(status
)) {
827 tevent_req_nterror(req
, status
);
830 tevent_req_done(req
);
833 NTSTATUS
open_socket_out_defer_recv(struct tevent_req
*req
, int *pfd
)
835 struct open_socket_out_defer_state
*state
= tevent_req_data(
836 req
, struct open_socket_out_defer_state
);
839 if (tevent_req_is_nterror(req
, &status
)) {
847 /****************************************************************************
848 Open a connected UDP socket to host on port
849 **************************************************************************/
851 int open_udp_socket(const char *host
, int port
)
853 struct sockaddr_storage ss
;
857 if (!interpret_string_addr(&ss
, host
, 0)) {
858 DEBUG(10,("open_udp_socket: can't resolve name %s\n",
863 res
= socket(ss
.ss_family
, SOCK_DGRAM
, 0);
868 #if defined(HAVE_IPV6)
869 if (ss
.ss_family
== AF_INET6
) {
870 struct sockaddr_in6
*psa6
;
871 psa6
= (struct sockaddr_in6
*)&ss
;
872 psa6
->sin6_port
= htons(port
);
873 if (psa6
->sin6_scope_id
== 0
874 && IN6_IS_ADDR_LINKLOCAL(&psa6
->sin6_addr
)) {
875 setup_linklocal_scope_id(
876 (struct sockaddr
*)&ss
);
878 salen
= sizeof(struct sockaddr_in6
);
881 if (ss
.ss_family
== AF_INET
) {
882 struct sockaddr_in
*psa
;
883 psa
= (struct sockaddr_in
*)&ss
;
884 psa
->sin_port
= htons(port
);
885 salen
= sizeof(struct sockaddr_in
);
887 DEBUG(1, ("unknown socket family %d", ss
.ss_family
));
892 if (connect(res
, (struct sockaddr
*)&ss
, salen
)) {
900 /*******************************************************************
901 Return the IP addr of the remote end of a socket as a string.
902 Optionally return the struct sockaddr_storage.
903 ******************************************************************/
905 static const char *get_peer_addr_internal(int fd
,
908 struct sockaddr
*pss
,
911 struct sockaddr_storage ss
;
912 socklen_t length
= sizeof(ss
);
914 strlcpy(addr_buf
,"0.0.0.0",addr_buf_len
);
921 pss
= (struct sockaddr
*)&ss
;
925 if (getpeername(fd
, (struct sockaddr
*)pss
, plength
) < 0) {
926 int level
= (errno
== ENOTCONN
) ? 2 : 0;
927 DEBUG(level
, ("getpeername failed. Error was %s\n",
932 print_sockaddr_len(addr_buf
,
939 /*******************************************************************
940 Matchname - determine if host name matches IP address. Used to
941 confirm a hostname lookup to prevent spoof attacks.
942 ******************************************************************/
944 static bool matchname(const char *remotehost
,
945 const struct sockaddr
*pss
,
948 struct addrinfo
*res
= NULL
;
949 struct addrinfo
*ailist
= NULL
;
950 char addr_buf
[INET6_ADDRSTRLEN
];
951 bool ret
= interpret_string_addr_internal(&ailist
,
953 AI_ADDRCONFIG
|AI_CANONNAME
);
955 if (!ret
|| ailist
== NULL
) {
956 DEBUG(3,("matchname: getaddrinfo failed for "
959 gai_strerror(ret
) ));
964 * Make sure that getaddrinfo() returns the "correct" host name.
967 if (ailist
->ai_canonname
== NULL
||
968 (!strequal(remotehost
, ailist
->ai_canonname
) &&
969 !strequal(remotehost
, "localhost"))) {
970 DEBUG(0,("matchname: host name/name mismatch: %s != %s\n",
972 ailist
->ai_canonname
?
973 ailist
->ai_canonname
: "(NULL)"));
974 freeaddrinfo(ailist
);
978 /* Look up the host address in the address list we just got. */
979 for (res
= ailist
; res
; res
= res
->ai_next
) {
983 if (sockaddr_equal((const struct sockaddr
*)res
->ai_addr
,
984 (const struct sockaddr
*)pss
)) {
985 freeaddrinfo(ailist
);
991 * The host name does not map to the original host address. Perhaps
992 * someone has compromised a name server. More likely someone botched
993 * it, but that could be dangerous, too.
996 DEBUG(0,("matchname: host name/address mismatch: %s != %s\n",
997 print_sockaddr_len(addr_buf
,
1001 ailist
->ai_canonname
? ailist
->ai_canonname
: "(NULL)"));
1004 freeaddrinfo(ailist
);
1009 /*******************************************************************
1010 Deal with the singleton cache.
1011 ******************************************************************/
1013 struct name_addr_pair
{
1014 struct sockaddr_storage ss
;
1018 /*******************************************************************
1019 Lookup a name/addr pair. Returns memory allocated from memcache.
1020 ******************************************************************/
1022 static bool lookup_nc(struct name_addr_pair
*nc
)
1028 if (!memcache_lookup(
1029 NULL
, SINGLETON_CACHE
,
1030 data_blob_string_const_null("get_peer_name"),
1035 memcpy(&nc
->ss
, tmp
.data
, sizeof(nc
->ss
));
1036 nc
->name
= (const char *)tmp
.data
+ sizeof(nc
->ss
);
1040 /*******************************************************************
1041 Save a name/addr pair.
1042 ******************************************************************/
1044 static void store_nc(const struct name_addr_pair
*nc
)
1047 size_t namelen
= strlen(nc
->name
);
1049 tmp
= data_blob(NULL
, sizeof(nc
->ss
) + namelen
+ 1);
1053 memcpy(tmp
.data
, &nc
->ss
, sizeof(nc
->ss
));
1054 memcpy(tmp
.data
+sizeof(nc
->ss
), nc
->name
, namelen
+1);
1056 memcache_add(NULL
, SINGLETON_CACHE
,
1057 data_blob_string_const_null("get_peer_name"),
1059 data_blob_free(&tmp
);
1062 /*******************************************************************
1063 Return the IP addr of the remote end of a socket as a string.
1064 ******************************************************************/
1066 const char *get_peer_addr(int fd
, char *addr
, size_t addr_len
)
1068 return get_peer_addr_internal(fd
, addr
, addr_len
, NULL
, NULL
);
1071 int get_remote_hostname(const struct tsocket_address
*remote_address
,
1073 TALLOC_CTX
*mem_ctx
)
1075 char name_buf
[MAX_DNS_NAME_LENGTH
];
1076 char tmp_name
[MAX_DNS_NAME_LENGTH
];
1077 struct name_addr_pair nc
;
1078 struct sockaddr_storage ss
;
1082 if (!lp_hostname_lookups()) {
1083 nc
.name
= tsocket_address_inet_addr_string(remote_address
,
1085 if (nc
.name
== NULL
) {
1089 len
= tsocket_address_bsd_sockaddr(remote_address
,
1090 (struct sockaddr
*) &nc
.ss
,
1091 sizeof(struct sockaddr_storage
));
1099 if (nc
.name
== NULL
) {
1100 *name
= talloc_strdup(mem_ctx
, "UNKNOWN");
1102 *name
= talloc_strdup(mem_ctx
, nc
.name
);
1111 len
= tsocket_address_bsd_sockaddr(remote_address
,
1112 (struct sockaddr
*) &ss
,
1113 sizeof(struct sockaddr_storage
));
1118 /* it might be the same as the last one - save some DNS work */
1119 if (sockaddr_equal((struct sockaddr
*)&ss
, (struct sockaddr
*)&nc
.ss
)) {
1120 if (nc
.name
== NULL
) {
1121 *name
= talloc_strdup(mem_ctx
, "UNKNOWN");
1123 *name
= talloc_strdup(mem_ctx
, nc
.name
);
1128 /* Look up the remote host name. */
1129 rc
= sys_getnameinfo((struct sockaddr
*) &ss
,
1139 p
= tsocket_address_inet_addr_string(remote_address
, mem_ctx
);
1144 DEBUG(1,("getnameinfo failed for %s with error %s\n",
1147 strlcpy(name_buf
, p
, sizeof(name_buf
));
1151 if (!matchname(name_buf
, (struct sockaddr
*)&ss
, len
)) {
1152 DEBUG(0,("matchname failed on %s\n", name_buf
));
1153 strlcpy(name_buf
, "UNKNOWN", sizeof(name_buf
));
1157 strlcpy(tmp_name
, name_buf
, sizeof(tmp_name
));
1158 alpha_strcpy(name_buf
, tmp_name
, "_-.", sizeof(name_buf
));
1159 if (strstr(name_buf
,"..")) {
1160 strlcpy(name_buf
, "UNKNOWN", sizeof(name_buf
));
1169 if (nc
.name
== NULL
) {
1170 *name
= talloc_strdup(mem_ctx
, "UNKOWN");
1172 *name
= talloc_strdup(mem_ctx
, nc
.name
);
1178 /*******************************************************************
1179 Create protected unix domain socket.
1181 Some unixes cannot set permissions on a ux-dom-sock, so we
1182 have to make sure that the directory contains the protection
1183 permissions instead.
1184 ******************************************************************/
1186 int create_pipe_sock(const char *socket_dir
,
1187 const char *socket_name
,
1190 #ifdef HAVE_UNIXSOCKET
1191 struct sockaddr_un sunaddr
;
1197 old_umask
= umask(0);
1199 ok
= directory_create_or_exist_strict(socket_dir
,
1206 /* Create the socket file */
1207 sock
= socket(AF_UNIX
, SOCK_STREAM
, 0);
1210 DEBUG(0, ("create_pipe_sock: socket error %s\n",
1215 if (asprintf(&path
, "%s/%s", socket_dir
, socket_name
) == -1) {
1220 memset(&sunaddr
, 0, sizeof(sunaddr
));
1221 sunaddr
.sun_family
= AF_UNIX
;
1222 strlcpy(sunaddr
.sun_path
, path
, sizeof(sunaddr
.sun_path
));
1224 if (bind(sock
, (struct sockaddr
*)&sunaddr
, sizeof(sunaddr
)) == -1) {
1225 DEBUG(0, ("bind failed on pipe socket %s: %s\n", path
,
1244 DEBUG(0, ("create_pipe_sock: No Unix sockets on this system\n"));
1246 #endif /* HAVE_UNIXSOCKET */
1249 /****************************************************************************
1250 Get my own canonical name, including domain.
1251 ****************************************************************************/
1253 const char *get_mydnsfullname(void)
1255 struct addrinfo
*res
= NULL
;
1256 char my_hostname
[HOST_NAME_MAX
];
1260 if (memcache_lookup(NULL
, SINGLETON_CACHE
,
1261 data_blob_string_const_null("get_mydnsfullname"),
1263 SMB_ASSERT(tmp
.length
> 0);
1264 return (const char *)tmp
.data
;
1267 /* get my host name */
1268 if (gethostname(my_hostname
, sizeof(my_hostname
)) == -1) {
1269 DEBUG(0,("get_mydnsfullname: gethostname failed\n"));
1273 /* Ensure null termination. */
1274 my_hostname
[sizeof(my_hostname
)-1] = '\0';
1276 ret
= interpret_string_addr_internal(&res
,
1278 AI_ADDRCONFIG
|AI_CANONNAME
);
1280 if (!ret
|| res
== NULL
) {
1281 DEBUG(3,("get_mydnsfullname: getaddrinfo failed for "
1284 gai_strerror(ret
) ));
1289 * Make sure that getaddrinfo() returns the "correct" host name.
1292 if (res
->ai_canonname
== NULL
) {
1293 DEBUG(3,("get_mydnsfullname: failed to get "
1294 "canonical name for %s\n",
1300 /* This copies the data, so we must do a lookup
1301 * afterwards to find the value to return.
1304 memcache_add(NULL
, SINGLETON_CACHE
,
1305 data_blob_string_const_null("get_mydnsfullname"),
1306 data_blob_string_const_null(res
->ai_canonname
));
1308 if (!memcache_lookup(NULL
, SINGLETON_CACHE
,
1309 data_blob_string_const_null("get_mydnsfullname"),
1311 tmp
= data_blob_talloc(talloc_tos(), res
->ai_canonname
,
1312 strlen(res
->ai_canonname
) + 1);
1317 return (const char *)tmp
.data
;
1320 /************************************************************
1321 Is this my ip address ?
1322 ************************************************************/
1324 static bool is_my_ipaddr(const char *ipaddr_str
)
1326 struct sockaddr_storage ss
;
1327 struct iface_struct
*nics
;
1330 if (!interpret_string_addr(&ss
, ipaddr_str
, AI_NUMERICHOST
)) {
1334 if (is_zero_addr(&ss
)) {
1338 if (ismyaddr((struct sockaddr
*)&ss
) ||
1339 is_loopback_addr((struct sockaddr
*)&ss
)) {
1343 n
= get_interfaces(talloc_tos(), &nics
);
1344 for (i
=0; i
<n
; i
++) {
1345 if (sockaddr_equal((struct sockaddr
*)&nics
[i
].ip
, (struct sockaddr
*)&ss
)) {
1354 /************************************************************
1356 ************************************************************/
1358 bool is_myname_or_ipaddr(const char *s
)
1360 TALLOC_CTX
*ctx
= talloc_tos();
1362 const char *dnsname
;
1363 char *servername
= NULL
;
1369 /* Santize the string from '\\name' */
1370 name
= talloc_strdup(ctx
, s
);
1375 servername
= strrchr_m(name
, '\\' );
1382 /* Optimize for the common case */
1383 if (strequal(servername
, lp_netbios_name())) {
1387 /* Check for an alias */
1388 if (is_myname(servername
)) {
1392 /* Check for loopback */
1393 if (strequal(servername
, "127.0.0.1") ||
1394 strequal(servername
, "::1")) {
1398 if (strequal(servername
, "localhost")) {
1402 /* Maybe it's my dns name */
1403 dnsname
= get_mydnsfullname();
1404 if (dnsname
&& strequal(servername
, dnsname
)) {
1408 /* Maybe its an IP address? */
1409 if (is_ipaddress(servername
)) {
1410 return is_my_ipaddr(servername
);
1413 /* Handle possible CNAME records - convert to an IP addr. list. */
1415 /* Use DNS to resolve the name, check all addresses. */
1416 struct addrinfo
*p
= NULL
;
1417 struct addrinfo
*res
= NULL
;
1419 if (!interpret_string_addr_internal(&res
,
1425 for (p
= res
; p
; p
= p
->ai_next
) {
1426 char addr
[INET6_ADDRSTRLEN
];
1427 struct sockaddr_storage ss
;
1430 memcpy(&ss
, p
->ai_addr
, p
->ai_addrlen
);
1431 print_sockaddr(addr
,
1434 if (is_my_ipaddr(addr
)) {
1446 struct getaddrinfo_state
{
1448 const char *service
;
1449 const struct addrinfo
*hints
;
1450 struct addrinfo
*res
;
1454 static void getaddrinfo_do(void *private_data
);
1455 static void getaddrinfo_done(struct tevent_req
*subreq
);
1457 struct tevent_req
*getaddrinfo_send(TALLOC_CTX
*mem_ctx
,
1458 struct tevent_context
*ev
,
1459 struct fncall_context
*ctx
,
1461 const char *service
,
1462 const struct addrinfo
*hints
)
1464 struct tevent_req
*req
, *subreq
;
1465 struct getaddrinfo_state
*state
;
1467 req
= tevent_req_create(mem_ctx
, &state
, struct getaddrinfo_state
);
1473 state
->service
= service
;
1474 state
->hints
= hints
;
1476 subreq
= fncall_send(state
, ev
, ctx
, getaddrinfo_do
, state
);
1477 if (tevent_req_nomem(subreq
, req
)) {
1478 return tevent_req_post(req
, ev
);
1480 tevent_req_set_callback(subreq
, getaddrinfo_done
, req
);
1484 static void getaddrinfo_do(void *private_data
)
1486 struct getaddrinfo_state
*state
=
1487 (struct getaddrinfo_state
*)private_data
;
1489 state
->ret
= getaddrinfo(state
->node
, state
->service
, state
->hints
,
1493 static void getaddrinfo_done(struct tevent_req
*subreq
)
1495 struct tevent_req
*req
= tevent_req_callback_data(
1496 subreq
, struct tevent_req
);
1499 ret
= fncall_recv(subreq
, &err
);
1500 TALLOC_FREE(subreq
);
1502 tevent_req_error(req
, err
);
1505 tevent_req_done(req
);
1508 int getaddrinfo_recv(struct tevent_req
*req
, struct addrinfo
**res
)
1510 struct getaddrinfo_state
*state
= tevent_req_data(
1511 req
, struct getaddrinfo_state
);
1514 if (tevent_req_is_unix_error(req
, &err
)) {
1522 if (state
->ret
== 0) {
1528 int poll_one_fd(int fd
, int events
, int timeout
, int *revents
)
1534 pfd
.events
= events
;
1536 ret
= poll(&pfd
, 1, timeout
);
1539 * Assign whatever poll did, even in the ret<=0 case.
1541 *revents
= pfd
.revents
;
1546 int poll_intr_one_fd(int fd
, int events
, int timeout
, int *revents
)
1552 pfd
.events
= events
;
1554 ret
= sys_poll_intr(&pfd
, 1, timeout
);
1559 *revents
= pfd
.revents
;