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/>.
24 /*******************************************************************
25 Map a text hostname or IP address (IPv4 or IPv6) into a
26 struct sockaddr_storage.
27 ******************************************************************/
29 bool interpret_string_addr(struct sockaddr_storage
*pss
,
33 struct addrinfo
*res
= NULL
;
34 #if defined(HAVE_IPV6)
35 char addr
[INET6_ADDRSTRLEN
];
36 unsigned int scope_id
= 0;
38 if (strchr_m(str
, ':')) {
39 char *p
= strchr_m(str
, '%');
42 * Cope with link-local.
43 * This is IP:v6:addr%ifname.
46 if (p
&& (p
> str
) && ((scope_id
= if_nametoindex(p
+1)) != 0)) {
48 MIN(PTR_DIFF(p
,str
)+1,
57 if (!interpret_string_addr_internal(&res
, str
, flags
|AI_ADDRCONFIG
)) {
63 /* Copy the first sockaddr. */
64 memcpy(pss
, res
->ai_addr
, res
->ai_addrlen
);
66 #if defined(HAVE_IPV6)
67 if (pss
->ss_family
== AF_INET6
&& scope_id
) {
68 struct sockaddr_in6
*ps6
= (struct sockaddr_in6
*)pss
;
69 if (IN6_IS_ADDR_LINKLOCAL(&ps6
->sin6_addr
) &&
70 ps6
->sin6_scope_id
== 0) {
71 ps6
->sin6_scope_id
= scope_id
;
80 /*******************************************************************
81 Set an address to INADDR_ANY.
82 ******************************************************************/
84 void zero_sockaddr(struct sockaddr_storage
*pss
)
86 memset(pss
, '\0', sizeof(*pss
));
87 /* Ensure we're at least a valid sockaddr-storage. */
88 pss
->ss_family
= AF_INET
;
91 /****************************************************************************
92 Get a port number in host byte order from a sockaddr_storage.
93 ****************************************************************************/
95 uint16_t get_sockaddr_port(const struct sockaddr_storage
*pss
)
99 if (pss
->ss_family
!= AF_INET
) {
100 #if defined(HAVE_IPV6)
102 const struct sockaddr_in6
*sa6
=
103 (const struct sockaddr_in6
*)pss
;
104 port
= ntohs(sa6
->sin6_port
);
107 const struct sockaddr_in
*sa
=
108 (const struct sockaddr_in
*)pss
;
109 port
= ntohs(sa
->sin_port
);
114 /****************************************************************************
115 Print out an IPv4 or IPv6 address from a struct sockaddr_storage.
116 ****************************************************************************/
118 static char *print_sockaddr_len(char *dest
,
120 const struct sockaddr
*psa
,
126 (void)sys_getnameinfo(psa
,
134 /****************************************************************************
135 Print out an IPv4 or IPv6 address from a struct sockaddr_storage.
136 ****************************************************************************/
138 char *print_sockaddr(char *dest
,
140 const struct sockaddr_storage
*psa
)
142 return print_sockaddr_len(dest
, destlen
, (struct sockaddr
*)psa
,
143 sizeof(struct sockaddr_storage
));
146 /****************************************************************************
147 Print out a canonical IPv4 or IPv6 address from a struct sockaddr_storage.
148 ****************************************************************************/
150 char *print_canonical_sockaddr(TALLOC_CTX
*ctx
,
151 const struct sockaddr_storage
*pss
)
153 char addr
[INET6_ADDRSTRLEN
];
157 /* Linux getnameinfo() man pages says port is unitialized if
158 service name is NULL. */
160 ret
= sys_getnameinfo((const struct sockaddr
*)pss
,
161 sizeof(struct sockaddr_storage
),
169 if (pss
->ss_family
!= AF_INET
) {
170 #if defined(HAVE_IPV6)
171 dest
= talloc_asprintf(ctx
, "[%s]", addr
);
176 dest
= talloc_asprintf(ctx
, "%s", addr
);
182 /****************************************************************************
183 Return the string of an IP address (IPv4 or IPv6).
184 ****************************************************************************/
186 static const char *get_socket_addr(int fd
, char *addr_buf
, size_t addr_len
)
188 struct sockaddr_storage sa
;
189 socklen_t length
= sizeof(sa
);
191 /* Ok, returning a hard coded IPv4 address
192 * is bogus, but it's just as bogus as a
193 * zero IPv6 address. No good choice here.
196 strlcpy(addr_buf
, "0.0.0.0", addr_len
);
202 if (getsockname(fd
, (struct sockaddr
*)&sa
, &length
) < 0) {
203 DEBUG(0,("getsockname failed. Error was %s\n",
208 return print_sockaddr_len(addr_buf
, addr_len
, (struct sockaddr
*)&sa
, length
);
211 /****************************************************************************
212 Return the port number we've bound to on a socket.
213 ****************************************************************************/
215 int get_socket_port(int fd
)
217 struct sockaddr_storage sa
;
218 socklen_t length
= sizeof(sa
);
224 if (getsockname(fd
, (struct sockaddr
*)&sa
, &length
) < 0) {
225 DEBUG(0,("getpeername failed. Error was %s\n",
230 #if defined(HAVE_IPV6)
231 if (sa
.ss_family
== AF_INET6
) {
232 return ntohs(((struct sockaddr_in6
*)&sa
)->sin6_port
);
235 if (sa
.ss_family
== AF_INET
) {
236 return ntohs(((struct sockaddr_in
*)&sa
)->sin_port
);
241 const char *client_name(int fd
)
243 return get_peer_name(fd
,false);
246 const char *client_addr(int fd
, char *addr
, size_t addrlen
)
248 return get_peer_addr(fd
,addr
,addrlen
);
251 const char *client_socket_addr(int fd
, char *addr
, size_t addr_len
)
253 return get_socket_addr(fd
, addr
, addr_len
);
257 /* Not currently used. JRA. */
258 int client_socket_port(int fd
)
260 return get_socket_port(fd
);
264 /****************************************************************************
265 Accessor functions to make thread-safe code easier later...
266 ****************************************************************************/
268 void set_smb_read_error(enum smb_read_errors
*pre
,
269 enum smb_read_errors newerr
)
276 void cond_set_smb_read_error(enum smb_read_errors
*pre
,
277 enum smb_read_errors newerr
)
279 if (pre
&& *pre
== SMB_READ_OK
) {
284 /****************************************************************************
285 Determine if a file descriptor is in fact a socket.
286 ****************************************************************************/
288 bool is_a_socket(int fd
)
293 return(getsockopt(fd
, SOL_SOCKET
, SO_TYPE
, (char *)&v
, &l
) == 0);
296 enum SOCK_OPT_TYPES
{OPT_BOOL
,OPT_INT
,OPT_ON
};
298 typedef struct smb_socket_option
{
306 static const smb_socket_option socket_options
[] = {
307 {"SO_KEEPALIVE", SOL_SOCKET
, SO_KEEPALIVE
, 0, OPT_BOOL
},
308 {"SO_REUSEADDR", SOL_SOCKET
, SO_REUSEADDR
, 0, OPT_BOOL
},
309 {"SO_BROADCAST", SOL_SOCKET
, SO_BROADCAST
, 0, OPT_BOOL
},
311 {"TCP_NODELAY", IPPROTO_TCP
, TCP_NODELAY
, 0, OPT_BOOL
},
314 {"TCP_KEEPCNT", IPPROTO_TCP
, TCP_KEEPCNT
, 0, OPT_INT
},
317 {"TCP_KEEPIDLE", IPPROTO_TCP
, TCP_KEEPIDLE
, 0, OPT_INT
},
320 {"TCP_KEEPINTVL", IPPROTO_TCP
, TCP_KEEPINTVL
, 0, OPT_INT
},
322 #ifdef IPTOS_LOWDELAY
323 {"IPTOS_LOWDELAY", IPPROTO_IP
, IP_TOS
, IPTOS_LOWDELAY
, OPT_ON
},
325 #ifdef IPTOS_THROUGHPUT
326 {"IPTOS_THROUGHPUT", IPPROTO_IP
, IP_TOS
, IPTOS_THROUGHPUT
, OPT_ON
},
329 {"SO_REUSEPORT", SOL_SOCKET
, SO_REUSEPORT
, 0, OPT_BOOL
},
332 {"SO_SNDBUF", SOL_SOCKET
, SO_SNDBUF
, 0, OPT_INT
},
335 {"SO_RCVBUF", SOL_SOCKET
, SO_RCVBUF
, 0, OPT_INT
},
338 {"SO_SNDLOWAT", SOL_SOCKET
, SO_SNDLOWAT
, 0, OPT_INT
},
341 {"SO_RCVLOWAT", SOL_SOCKET
, SO_RCVLOWAT
, 0, OPT_INT
},
344 {"SO_SNDTIMEO", SOL_SOCKET
, SO_SNDTIMEO
, 0, OPT_INT
},
347 {"SO_RCVTIMEO", SOL_SOCKET
, SO_RCVTIMEO
, 0, OPT_INT
},
350 {"TCP_FASTACK", IPPROTO_TCP
, TCP_FASTACK
, 0, OPT_INT
},
354 /****************************************************************************
355 Print socket options.
356 ****************************************************************************/
358 static void print_socket_options(int s
)
362 const smb_socket_option
*p
= &socket_options
[0];
364 /* wrapped in if statement to prevent streams
365 * leak in SCO Openserver 5.0 */
366 /* reported on samba-technical --jerry */
367 if ( DEBUGLEVEL
>= 5 ) {
368 DEBUG(5,("Socket options:\n"));
369 for (; p
->name
!= NULL
; p
++) {
370 if (getsockopt(s
, p
->level
, p
->option
,
371 (void *)&value
, &vlen
) == -1) {
372 DEBUGADD(5,("\tCould not test socket option %s.\n",
375 DEBUGADD(5,("\t%s = %d\n",
382 /****************************************************************************
383 Set user socket options.
384 ****************************************************************************/
386 void set_socket_options(int fd
, const char *options
)
388 TALLOC_CTX
*ctx
= talloc_stackframe();
391 while (next_token_talloc(ctx
, &options
, &tok
," \t,")) {
395 bool got_value
= false;
397 if ((p
= strchr_m(tok
,'='))) {
403 for (i
=0;socket_options
[i
].name
;i
++)
404 if (strequal(socket_options
[i
].name
,tok
))
407 if (!socket_options
[i
].name
) {
408 DEBUG(0,("Unknown socket option %s\n",tok
));
412 switch (socket_options
[i
].opttype
) {
415 ret
= setsockopt(fd
,socket_options
[i
].level
,
416 socket_options
[i
].option
,
417 (char *)&value
,sizeof(int));
422 DEBUG(0,("syntax error - %s "
423 "does not take a value\n",tok
));
426 int on
= socket_options
[i
].value
;
427 ret
= setsockopt(fd
,socket_options
[i
].level
,
428 socket_options
[i
].option
,
429 (char *)&on
,sizeof(int));
435 /* be aware that some systems like Solaris return
436 * EINVAL to a setsockopt() call when the client
437 * sent a RST previously - no need to worry */
438 DEBUG(2,("Failed to set socket option %s (Error %s)\n",
439 tok
, strerror(errno
) ));
444 print_socket_options(fd
);
447 /****************************************************************************
449 ****************************************************************************/
451 ssize_t
read_udp_v4_socket(int fd
,
454 struct sockaddr_storage
*psa
)
457 socklen_t socklen
= sizeof(*psa
);
458 struct sockaddr_in
*si
= (struct sockaddr_in
*)psa
;
460 memset((char *)psa
,'\0',socklen
);
462 ret
= (ssize_t
)sys_recvfrom(fd
,buf
,len
,0,
463 (struct sockaddr
*)psa
,&socklen
);
465 /* Don't print a low debug error for a non-blocking socket. */
466 if (errno
== EAGAIN
) {
467 DEBUG(10,("read_udp_v4_socket: returned EAGAIN\n"));
469 DEBUG(2,("read_udp_v4_socket: failed. errno=%s\n",
475 if (psa
->ss_family
!= AF_INET
) {
476 DEBUG(2,("read_udp_v4_socket: invalid address family %d "
477 "(not IPv4)\n", (int)psa
->ss_family
));
481 DEBUG(10,("read_udp_v4_socket: ip %s port %d read: %lu\n",
482 inet_ntoa(si
->sin_addr
),
484 (unsigned long)ret
));
489 /****************************************************************************
490 Read data from a socket with a timout in msec.
491 mincount = if timeout, minimum to read before returning
492 maxcount = number to be read.
493 time_out = timeout in milliseconds
494 ****************************************************************************/
496 NTSTATUS
read_socket_with_timeout(int fd
, char *buf
,
497 size_t mincnt
, size_t maxcnt
,
498 unsigned int time_out
,
505 struct timeval timeout
;
506 char addr
[INET6_ADDRSTRLEN
];
508 /* just checking .... */
518 while (nread
< mincnt
) {
519 readret
= sys_recv(fd
, buf
+ nread
, maxcnt
- nread
, 0);
522 DEBUG(5,("read_socket_with_timeout: "
523 "blocking read. EOF from client.\n"));
524 return NT_STATUS_END_OF_FILE
;
528 if (fd
== get_client_fd()) {
529 /* Try and give an error message
530 * saying what client failed. */
531 DEBUG(0,("read_socket_with_timeout: "
532 "client %s read error = %s.\n",
533 get_peer_addr(fd
,addr
,sizeof(addr
)),
536 DEBUG(0,("read_socket_with_timeout: "
537 "read error = %s.\n",
540 return map_nt_error_from_unix(errno
);
547 /* Most difficult - timeout read */
548 /* If this is ever called on a disk file and
549 mincnt is greater then the filesize then
550 system performance will suffer severely as
551 select always returns true on disk files */
553 /* Set initial timeout */
554 timeout
.tv_sec
= (time_t)(time_out
/ 1000);
555 timeout
.tv_usec
= (long)(1000 * (time_out
% 1000));
557 for (nread
=0; nread
< mincnt
; ) {
561 selrtn
= sys_select_intr(fd
+1,&fds
,NULL
,NULL
,&timeout
);
565 /* something is wrong. Maybe the socket is dead? */
566 if (fd
== get_client_fd()) {
567 /* Try and give an error message saying
568 * what client failed. */
569 DEBUG(0,("read_socket_with_timeout: timeout "
570 "read for client %s. select error = %s.\n",
571 get_peer_addr(fd
,addr
,sizeof(addr
)),
574 DEBUG(0,("read_socket_with_timeout: timeout "
575 "read. select error = %s.\n",
578 return map_nt_error_from_unix(errno
);
581 /* Did we timeout ? */
583 DEBUG(10,("read_socket_with_timeout: timeout read. "
584 "select timed out.\n"));
585 return NT_STATUS_IO_TIMEOUT
;
588 readret
= sys_recv(fd
, buf
+nread
, maxcnt
-nread
, 0);
591 /* we got EOF on the file descriptor */
592 DEBUG(5,("read_socket_with_timeout: timeout read. "
593 "EOF from client.\n"));
594 return NT_STATUS_END_OF_FILE
;
598 /* the descriptor is probably dead */
599 if (fd
== get_client_fd()) {
600 /* Try and give an error message
601 * saying what client failed. */
602 DEBUG(0,("read_socket_with_timeout: timeout "
603 "read to client %s. read error = %s.\n",
604 get_peer_addr(fd
,addr
,sizeof(addr
)),
607 DEBUG(0,("read_socket_with_timeout: timeout "
608 "read. read error = %s.\n",
611 return map_nt_error_from_unix(errno
);
618 /* Return the number we got */
625 /****************************************************************************
626 Read data from the client, reading exactly N bytes.
627 ****************************************************************************/
629 NTSTATUS
read_data(int fd
, char *buffer
, size_t N
)
631 return read_socket_with_timeout(fd
, buffer
, N
, N
, 0, NULL
);
634 /****************************************************************************
635 Write all data from an iov array
636 ****************************************************************************/
638 ssize_t
write_data_iov(int fd
, const struct iovec
*orig_iov
, int iovcnt
)
644 struct iovec
*iov_copy
, *iov
;
647 for (i
=0; i
<iovcnt
; i
++) {
648 to_send
+= orig_iov
[i
].iov_len
;
651 thistime
= sys_writev(fd
, orig_iov
, iovcnt
);
652 if ((thistime
<= 0) || (thistime
== to_send
)) {
658 * We could not send everything in one call. Make a copy of iov that
659 * we can mess with. We keep a copy of the array start in iov_copy for
660 * the TALLOC_FREE, because we're going to modify iov later on,
661 * discarding elements.
664 iov_copy
= (struct iovec
*)TALLOC_MEMDUP(
665 talloc_tos(), orig_iov
, sizeof(struct iovec
) * iovcnt
);
667 if (iov_copy
== NULL
) {
673 while (sent
< to_send
) {
675 * We have to discard "thistime" bytes from the beginning
676 * iov array, "thistime" contains the number of bytes sent
679 while (thistime
> 0) {
680 if (thistime
< iov
[0].iov_len
) {
682 (char *)iov
[0].iov_base
+ thistime
;
683 iov
[0].iov_base
= (void *)new_base
;
684 iov
[0].iov_len
-= thistime
;
687 thistime
-= iov
[0].iov_len
;
692 thistime
= sys_writev(fd
, iov
, iovcnt
);
699 TALLOC_FREE(iov_copy
);
703 /****************************************************************************
705 ****************************************************************************/
707 ssize_t
write_data(int fd
, const char *buffer
, size_t N
)
712 iov
.iov_base
= CONST_DISCARD(void *, buffer
);
715 ret
= write_data_iov(fd
, &iov
, 1);
720 if (fd
== get_client_fd()) {
721 char addr
[INET6_ADDRSTRLEN
];
723 * Try and give an error message saying what client failed.
725 DEBUG(0, ("write_data: write failure in writing to client %s. "
726 "Error %s\n", get_peer_addr(fd
,addr
,sizeof(addr
)),
729 DEBUG(0,("write_data: write failure. Error = %s\n",
736 /****************************************************************************
737 Send a keepalive packet (rfc1002).
738 ****************************************************************************/
740 bool send_keepalive(int client
)
742 unsigned char buf
[4];
744 buf
[0] = SMBkeepalive
;
745 buf
[1] = buf
[2] = buf
[3] = 0;
747 return(write_data(client
,(char *)buf
,4) == 4);
750 /****************************************************************************
751 Read 4 bytes of a smb packet and return the smb length of the packet.
752 Store the result in the buffer.
753 This version of the function will return a length of zero on receiving
755 Timeout is in milliseconds.
756 ****************************************************************************/
758 NTSTATUS
read_smb_length_return_keepalive(int fd
, char *inbuf
,
759 unsigned int timeout
,
765 status
= read_socket_with_timeout(fd
, inbuf
, 4, 4, timeout
, NULL
);
767 if (!NT_STATUS_IS_OK(status
)) {
771 *len
= smb_len(inbuf
);
772 msg_type
= CVAL(inbuf
,0);
774 if (msg_type
== SMBkeepalive
) {
775 DEBUG(5,("Got keepalive packet\n"));
778 DEBUG(10,("got smb length of %lu\n",(unsigned long)(*len
)));
783 /****************************************************************************
784 Read 4 bytes of a smb packet and return the smb length of the packet.
785 Store the result in the buffer. This version of the function will
786 never return a session keepalive (length of zero).
787 Timeout is in milliseconds.
788 ****************************************************************************/
790 NTSTATUS
read_smb_length(int fd
, char *inbuf
, unsigned int timeout
,
793 uint8_t msgtype
= SMBkeepalive
;
795 while (msgtype
== SMBkeepalive
) {
798 status
= read_smb_length_return_keepalive(fd
, inbuf
, timeout
,
800 if (!NT_STATUS_IS_OK(status
)) {
804 msgtype
= CVAL(inbuf
, 0);
807 DEBUG(10,("read_smb_length: got smb length of %lu\n",
808 (unsigned long)len
));
813 /****************************************************************************
814 Read an smb from a fd.
815 The timeout is in milliseconds.
816 This function will return on receipt of a session keepalive packet.
817 maxlen is the max number of bytes to return, not including the 4 byte
818 length. If zero it means buflen limit.
819 Doesn't check the MAC on signed packets.
820 ****************************************************************************/
822 NTSTATUS
receive_smb_raw(int fd
, char *buffer
, size_t buflen
, unsigned int timeout
,
823 size_t maxlen
, size_t *p_len
)
828 status
= read_smb_length_return_keepalive(fd
,buffer
,timeout
,&len
);
830 if (!NT_STATUS_IS_OK(status
)) {
831 DEBUG(10, ("receive_smb_raw: %s!\n", nt_errstr(status
)));
836 DEBUG(0,("Invalid packet length! (%lu bytes).\n",
837 (unsigned long)len
));
838 return NT_STATUS_INVALID_PARAMETER
;
843 len
= MIN(len
,maxlen
);
846 status
= read_socket_with_timeout(
847 fd
, buffer
+4, len
, len
, timeout
, &len
);
849 if (!NT_STATUS_IS_OK(status
)) {
853 /* not all of samba3 properly checks for packet-termination
854 * of strings. This ensures that we don't run off into
856 SSVAL(buffer
+4,len
, 0);
863 /****************************************************************************
864 Open a socket of the specified type, port, and address for incoming data.
865 ****************************************************************************/
867 int open_socket_in(int type
,
870 const struct sockaddr_storage
*psock
,
873 struct sockaddr_storage sock
;
875 socklen_t slen
= sizeof(struct sockaddr_in
);
879 #if defined(HAVE_IPV6)
880 if (sock
.ss_family
== AF_INET6
) {
881 ((struct sockaddr_in6
*)&sock
)->sin6_port
= htons(port
);
882 slen
= sizeof(struct sockaddr_in6
);
885 if (sock
.ss_family
== AF_INET
) {
886 ((struct sockaddr_in
*)&sock
)->sin_port
= htons(port
);
889 res
= socket(sock
.ss_family
, type
, 0 );
892 dbgtext( "open_socket_in(): socket() call failed: " );
893 dbgtext( "%s\n", strerror( errno
) );
898 /* This block sets/clears the SO_REUSEADDR and possibly SO_REUSEPORT. */
900 int val
= rebind
? 1 : 0;
901 if( setsockopt(res
,SOL_SOCKET
,SO_REUSEADDR
,
902 (char *)&val
,sizeof(val
)) == -1 ) {
903 if( DEBUGLVL( dlevel
) ) {
904 dbgtext( "open_socket_in(): setsockopt: " );
905 dbgtext( "SO_REUSEADDR = %s ",
906 val
?"true":"false" );
907 dbgtext( "on port %d failed ", port
);
908 dbgtext( "with error = %s\n", strerror(errno
) );
912 if( setsockopt(res
,SOL_SOCKET
,SO_REUSEPORT
,
913 (char *)&val
,sizeof(val
)) == -1 ) {
914 if( DEBUGLVL( dlevel
) ) {
915 dbgtext( "open_socket_in(): setsockopt: ");
916 dbgtext( "SO_REUSEPORT = %s ",
918 dbgtext( "on port %d failed ", port
);
919 dbgtext( "with error = %s\n", strerror(errno
));
922 #endif /* SO_REUSEPORT */
925 /* now we've got a socket - we need to bind it */
926 if (bind(res
, (struct sockaddr
*)&sock
, slen
) == -1 ) {
927 if( DEBUGLVL(dlevel
) && (port
== SMB_PORT1
||
928 port
== SMB_PORT2
|| port
== NMB_PORT
) ) {
929 char addr
[INET6_ADDRSTRLEN
];
930 print_sockaddr(addr
, sizeof(addr
),
932 dbgtext( "bind failed on port %d ", port
);
933 dbgtext( "socket_addr = %s.\n", addr
);
934 dbgtext( "Error = %s\n", strerror(errno
));
940 DEBUG( 10, ( "bind succeeded on port %d\n", port
) );
944 struct open_socket_out_state
{
946 struct event_context
*ev
;
947 struct sockaddr_storage ss
;
953 static void open_socket_out_connected(struct tevent_req
*subreq
);
955 static int open_socket_out_state_destructor(struct open_socket_out_state
*s
)
963 /****************************************************************************
964 Create an outgoing socket. timeout is in milliseconds.
965 **************************************************************************/
967 struct tevent_req
*open_socket_out_send(TALLOC_CTX
*mem_ctx
,
968 struct event_context
*ev
,
969 const struct sockaddr_storage
*pss
,
973 char addr
[INET6_ADDRSTRLEN
];
974 struct tevent_req
*result
, *subreq
;
975 struct open_socket_out_state
*state
;
978 result
= tevent_req_create(mem_ctx
, &state
,
979 struct open_socket_out_state
);
980 if (result
== NULL
) {
986 state
->wait_nsec
= 10000;
989 state
->fd
= socket(state
->ss
.ss_family
, SOCK_STREAM
, 0);
990 if (state
->fd
== -1) {
991 status
= map_nt_error_from_unix(errno
);
994 talloc_set_destructor(state
, open_socket_out_state_destructor
);
996 if (!tevent_req_set_endtime(
997 result
, ev
, timeval_current_ofs(0, timeout
*1000))) {
1001 #if defined(HAVE_IPV6)
1002 if (pss
->ss_family
== AF_INET6
) {
1003 struct sockaddr_in6
*psa6
;
1004 psa6
= (struct sockaddr_in6
*)&state
->ss
;
1005 psa6
->sin6_port
= htons(port
);
1006 if (psa6
->sin6_scope_id
== 0
1007 && IN6_IS_ADDR_LINKLOCAL(&psa6
->sin6_addr
)) {
1008 setup_linklocal_scope_id(
1009 (struct sockaddr
*)&(state
->ss
));
1011 state
->salen
= sizeof(struct sockaddr_in6
);
1014 if (pss
->ss_family
== AF_INET
) {
1015 struct sockaddr_in
*psa
;
1016 psa
= (struct sockaddr_in
*)&state
->ss
;
1017 psa
->sin_port
= htons(port
);
1018 state
->salen
= sizeof(struct sockaddr_in
);
1021 if (pss
->ss_family
== AF_UNIX
) {
1022 state
->salen
= sizeof(struct sockaddr_un
);
1025 print_sockaddr(addr
, sizeof(addr
), &state
->ss
);
1026 DEBUG(3,("Connecting to %s at port %u\n", addr
, (unsigned int)port
));
1028 subreq
= async_connect_send(state
, state
->ev
, state
->fd
,
1029 (struct sockaddr
*)&state
->ss
,
1031 if ((subreq
== NULL
)
1032 || !tevent_req_set_endtime(
1034 timeval_current_ofs(0, state
->wait_nsec
))) {
1037 tevent_req_set_callback(subreq
, open_socket_out_connected
, result
);
1041 tevent_req_nterror(result
, status
);
1042 return tevent_req_post(result
, ev
);
1044 TALLOC_FREE(result
);
1048 static void open_socket_out_connected(struct tevent_req
*subreq
)
1050 struct tevent_req
*req
=
1051 tevent_req_callback_data(subreq
, struct tevent_req
);
1052 struct open_socket_out_state
*state
=
1053 tevent_req_data(req
, struct open_socket_out_state
);
1057 ret
= async_connect_recv(subreq
, &sys_errno
);
1058 TALLOC_FREE(subreq
);
1060 tevent_req_done(req
);
1066 (sys_errno
== ETIMEDOUT
) ||
1068 (sys_errno
== EINPROGRESS
) ||
1069 (sys_errno
== EALREADY
) ||
1070 (sys_errno
== EAGAIN
)) {
1076 if (state
->wait_nsec
< 250000) {
1077 state
->wait_nsec
*= 1.5;
1080 subreq
= async_connect_send(state
, state
->ev
, state
->fd
,
1081 (struct sockaddr
*)&state
->ss
,
1083 if (tevent_req_nomem(subreq
, req
)) {
1086 if (!tevent_req_set_endtime(
1088 timeval_current_ofs(0, state
->wait_nsec
))) {
1089 tevent_req_nterror(req
, NT_STATUS_NO_MEMORY
);
1092 tevent_req_set_callback(subreq
, open_socket_out_connected
, req
);
1097 if (sys_errno
== EISCONN
) {
1098 tevent_req_done(req
);
1104 tevent_req_nterror(req
, map_nt_error_from_unix(sys_errno
));
1107 NTSTATUS
open_socket_out_recv(struct tevent_req
*req
, int *pfd
)
1109 struct open_socket_out_state
*state
=
1110 tevent_req_data(req
, struct open_socket_out_state
);
1113 if (tevent_req_is_nterror(req
, &status
)) {
1118 return NT_STATUS_OK
;
1121 NTSTATUS
open_socket_out(const struct sockaddr_storage
*pss
, uint16_t port
,
1122 int timeout
, int *pfd
)
1124 TALLOC_CTX
*frame
= talloc_stackframe();
1125 struct event_context
*ev
;
1126 struct tevent_req
*req
;
1127 NTSTATUS status
= NT_STATUS_NO_MEMORY
;
1129 ev
= event_context_init(frame
);
1134 req
= open_socket_out_send(frame
, ev
, pss
, port
, timeout
);
1138 if (!tevent_req_poll(req
, ev
)) {
1139 status
= NT_STATUS_INTERNAL_ERROR
;
1142 status
= open_socket_out_recv(req
, pfd
);
1148 struct open_socket_out_defer_state
{
1149 struct event_context
*ev
;
1150 struct sockaddr_storage ss
;
1156 static void open_socket_out_defer_waited(struct tevent_req
*subreq
);
1157 static void open_socket_out_defer_connected(struct tevent_req
*subreq
);
1159 struct tevent_req
*open_socket_out_defer_send(TALLOC_CTX
*mem_ctx
,
1160 struct event_context
*ev
,
1161 struct timeval wait_time
,
1162 const struct sockaddr_storage
*pss
,
1166 struct tevent_req
*req
, *subreq
;
1167 struct open_socket_out_defer_state
*state
;
1169 req
= tevent_req_create(mem_ctx
, &state
,
1170 struct open_socket_out_defer_state
);
1177 state
->timeout
= timeout
;
1179 subreq
= tevent_wakeup_send(
1181 timeval_current_ofs(wait_time
.tv_sec
, wait_time
.tv_usec
));
1182 if (subreq
== NULL
) {
1185 tevent_req_set_callback(subreq
, open_socket_out_defer_waited
, req
);
1192 static void open_socket_out_defer_waited(struct tevent_req
*subreq
)
1194 struct tevent_req
*req
= tevent_req_callback_data(
1195 subreq
, struct tevent_req
);
1196 struct open_socket_out_defer_state
*state
= tevent_req_data(
1197 req
, struct open_socket_out_defer_state
);
1200 ret
= tevent_wakeup_recv(subreq
);
1201 TALLOC_FREE(subreq
);
1203 tevent_req_nterror(req
, NT_STATUS_INTERNAL_ERROR
);
1207 subreq
= open_socket_out_send(state
, state
->ev
, &state
->ss
,
1208 state
->port
, state
->timeout
);
1209 if (tevent_req_nomem(subreq
, req
)) {
1212 tevent_req_set_callback(subreq
, open_socket_out_defer_connected
, req
);
1215 static void open_socket_out_defer_connected(struct tevent_req
*subreq
)
1217 struct tevent_req
*req
= tevent_req_callback_data(
1218 subreq
, struct tevent_req
);
1219 struct open_socket_out_defer_state
*state
= tevent_req_data(
1220 req
, struct open_socket_out_defer_state
);
1223 status
= open_socket_out_recv(subreq
, &state
->fd
);
1224 TALLOC_FREE(subreq
);
1225 if (!NT_STATUS_IS_OK(status
)) {
1226 tevent_req_nterror(req
, status
);
1229 tevent_req_done(req
);
1232 NTSTATUS
open_socket_out_defer_recv(struct tevent_req
*req
, int *pfd
)
1234 struct open_socket_out_defer_state
*state
= tevent_req_data(
1235 req
, struct open_socket_out_defer_state
);
1238 if (tevent_req_is_nterror(req
, &status
)) {
1243 return NT_STATUS_OK
;
1246 /*******************************************************************
1247 Create an outgoing TCP socket to the first addr that connects.
1249 This is for simultaneous connection attempts to port 445 and 139 of a host
1250 or for simultatneous connection attempts to multiple DCs at once. We return
1251 a socket fd of the first successful connection.
1253 @param[in] addrs list of Internet addresses and ports to connect to
1254 @param[in] num_addrs number of address/port pairs in the addrs list
1255 @param[in] timeout time after which we stop waiting for a socket connection
1256 to succeed, given in milliseconds
1257 @param[out] fd_index the entry in addrs which we successfully connected to
1258 @param[out] fd fd of the open and connected socket
1259 @return true on a successful connection, false if all connection attempts
1260 failed or we timed out
1261 *******************************************************************/
1263 bool open_any_socket_out(struct sockaddr_storage
*addrs
, int num_addrs
,
1264 int timeout
, int *fd_index
, int *fd
)
1266 int i
, resulting_index
, res
;
1270 fd_set r_fds
, wr_fds
;
1274 int connect_loop
= 10000; /* 10 milliseconds */
1276 timeout
*= 1000; /* convert to microseconds */
1278 sockets
= SMB_MALLOC_ARRAY(int, num_addrs
);
1280 if (sockets
== NULL
)
1283 resulting_index
= -1;
1285 for (i
=0; i
<num_addrs
; i
++)
1288 for (i
=0; i
<num_addrs
; i
++) {
1289 sockets
[i
] = socket(addrs
[i
].ss_family
, SOCK_STREAM
, 0);
1292 set_blocking(sockets
[i
], false);
1296 good_connect
= false;
1298 for (i
=0; i
<num_addrs
; i
++) {
1299 const struct sockaddr
* a
=
1300 (const struct sockaddr
*)&(addrs
[i
]);
1302 if (sockets
[i
] == -1)
1305 if (sys_connect(sockets
[i
], a
) == 0) {
1306 /* Rather unlikely as we are non-blocking, but it
1307 * might actually happen. */
1308 resulting_index
= i
;
1312 if (errno
== EINPROGRESS
|| errno
== EALREADY
||
1316 errno
== EAGAIN
|| errno
== EINTR
) {
1317 /* These are the error messages that something is
1319 good_connect
= true;
1320 } else if (errno
!= 0) {
1321 /* There was a direct error */
1327 if (!good_connect
) {
1328 /* All of the connect's resulted in real error conditions */
1332 /* Lets see if any of the connect attempts succeeded */
1338 for (i
=0; i
<num_addrs
; i
++) {
1339 if (sockets
[i
] == -1)
1341 FD_SET(sockets
[i
], &wr_fds
);
1342 FD_SET(sockets
[i
], &r_fds
);
1343 if (sockets
[i
]>maxfd
)
1348 tv
.tv_usec
= connect_loop
;
1350 res
= sys_select_intr(maxfd
+1, &r_fds
, &wr_fds
, NULL
, &tv
);
1358 for (i
=0; i
<num_addrs
; i
++) {
1360 if (sockets
[i
] == -1)
1363 /* Stevens, Network Programming says that if there's a
1364 * successful connect, the socket is only writable. Upon an
1365 * error, it's both readable and writable. */
1367 if (FD_ISSET(sockets
[i
], &r_fds
) &&
1368 FD_ISSET(sockets
[i
], &wr_fds
)) {
1369 /* readable and writable, so it's an error */
1375 if (!FD_ISSET(sockets
[i
], &r_fds
) &&
1376 FD_ISSET(sockets
[i
], &wr_fds
)) {
1377 /* Only writable, so it's connected */
1378 resulting_index
= i
;
1385 timeout
-= connect_loop
;
1388 connect_loop
*= 1.5;
1389 if (connect_loop
> timeout
)
1390 connect_loop
= timeout
;
1394 for (i
=0; i
<num_addrs
; i
++) {
1395 if (i
== resulting_index
)
1397 if (sockets
[i
] >= 0)
1401 if (resulting_index
>= 0) {
1402 *fd_index
= resulting_index
;
1403 *fd
= sockets
[*fd_index
];
1404 set_blocking(*fd
, true);
1409 return (resulting_index
>= 0);
1411 /****************************************************************************
1412 Open a connected UDP socket to host on port
1413 **************************************************************************/
1415 int open_udp_socket(const char *host
, int port
)
1417 struct sockaddr_storage ss
;
1420 if (!interpret_string_addr(&ss
, host
, 0)) {
1421 DEBUG(10,("open_udp_socket: can't resolve name %s\n",
1426 res
= socket(ss
.ss_family
, SOCK_DGRAM
, 0);
1431 #if defined(HAVE_IPV6)
1432 if (ss
.ss_family
== AF_INET6
) {
1433 struct sockaddr_in6
*psa6
;
1434 psa6
= (struct sockaddr_in6
*)&ss
;
1435 psa6
->sin6_port
= htons(port
);
1436 if (psa6
->sin6_scope_id
== 0
1437 && IN6_IS_ADDR_LINKLOCAL(&psa6
->sin6_addr
)) {
1438 setup_linklocal_scope_id(
1439 (struct sockaddr
*)&ss
);
1443 if (ss
.ss_family
== AF_INET
) {
1444 struct sockaddr_in
*psa
;
1445 psa
= (struct sockaddr_in
*)&ss
;
1446 psa
->sin_port
= htons(port
);
1449 if (sys_connect(res
,(struct sockaddr
*)&ss
)) {
1457 /*******************************************************************
1458 Return the IP addr of the remote end of a socket as a string.
1459 Optionally return the struct sockaddr_storage.
1460 ******************************************************************/
1462 static const char *get_peer_addr_internal(int fd
,
1464 size_t addr_buf_len
,
1465 struct sockaddr
*pss
,
1468 struct sockaddr_storage ss
;
1469 socklen_t length
= sizeof(ss
);
1471 strlcpy(addr_buf
,"0.0.0.0",addr_buf_len
);
1478 pss
= (struct sockaddr
*)&ss
;
1482 if (getpeername(fd
, (struct sockaddr
*)pss
, plength
) < 0) {
1483 DEBUG(0,("getpeername failed. Error was %s\n",
1488 print_sockaddr_len(addr_buf
,
1495 /*******************************************************************
1496 Matchname - determine if host name matches IP address. Used to
1497 confirm a hostname lookup to prevent spoof attacks.
1498 ******************************************************************/
1500 static bool matchname(const char *remotehost
,
1501 const struct sockaddr
*pss
,
1504 struct addrinfo
*res
= NULL
;
1505 struct addrinfo
*ailist
= NULL
;
1506 char addr_buf
[INET6_ADDRSTRLEN
];
1507 bool ret
= interpret_string_addr_internal(&ailist
,
1509 AI_ADDRCONFIG
|AI_CANONNAME
);
1511 if (!ret
|| ailist
== NULL
) {
1512 DEBUG(3,("matchname: getaddrinfo failed for "
1515 gai_strerror(ret
) ));
1520 * Make sure that getaddrinfo() returns the "correct" host name.
1523 if (ailist
->ai_canonname
== NULL
||
1524 (!strequal(remotehost
, ailist
->ai_canonname
) &&
1525 !strequal(remotehost
, "localhost"))) {
1526 DEBUG(0,("matchname: host name/name mismatch: %s != %s\n",
1528 ailist
->ai_canonname
?
1529 ailist
->ai_canonname
: "(NULL)"));
1530 freeaddrinfo(ailist
);
1534 /* Look up the host address in the address list we just got. */
1535 for (res
= ailist
; res
; res
= res
->ai_next
) {
1536 if (!res
->ai_addr
) {
1539 if (sockaddr_equal((const struct sockaddr
*)res
->ai_addr
,
1540 (struct sockaddr
*)pss
)) {
1541 freeaddrinfo(ailist
);
1547 * The host name does not map to the original host address. Perhaps
1548 * someone has compromised a name server. More likely someone botched
1549 * it, but that could be dangerous, too.
1552 DEBUG(0,("matchname: host name/address mismatch: %s != %s\n",
1553 print_sockaddr_len(addr_buf
,
1557 ailist
->ai_canonname
? ailist
->ai_canonname
: "(NULL)"));
1560 freeaddrinfo(ailist
);
1565 /*******************************************************************
1566 Deal with the singleton cache.
1567 ******************************************************************/
1569 struct name_addr_pair
{
1570 struct sockaddr_storage ss
;
1574 /*******************************************************************
1575 Lookup a name/addr pair. Returns memory allocated from memcache.
1576 ******************************************************************/
1578 static bool lookup_nc(struct name_addr_pair
*nc
)
1584 if (!memcache_lookup(
1585 NULL
, SINGLETON_CACHE
,
1586 data_blob_string_const_null("get_peer_name"),
1591 memcpy(&nc
->ss
, tmp
.data
, sizeof(nc
->ss
));
1592 nc
->name
= (const char *)tmp
.data
+ sizeof(nc
->ss
);
1596 /*******************************************************************
1597 Save a name/addr pair.
1598 ******************************************************************/
1600 static void store_nc(const struct name_addr_pair
*nc
)
1603 size_t namelen
= strlen(nc
->name
);
1605 tmp
= data_blob(NULL
, sizeof(nc
->ss
) + namelen
+ 1);
1609 memcpy(tmp
.data
, &nc
->ss
, sizeof(nc
->ss
));
1610 memcpy(tmp
.data
+sizeof(nc
->ss
), nc
->name
, namelen
+1);
1612 memcache_add(NULL
, SINGLETON_CACHE
,
1613 data_blob_string_const_null("get_peer_name"),
1615 data_blob_free(&tmp
);
1618 /*******************************************************************
1619 Return the DNS name of the remote end of a socket.
1620 ******************************************************************/
1622 const char *get_peer_name(int fd
, bool force_lookup
)
1624 struct name_addr_pair nc
;
1625 char addr_buf
[INET6_ADDRSTRLEN
];
1626 struct sockaddr_storage ss
;
1627 socklen_t length
= sizeof(ss
);
1630 char name_buf
[MAX_DNS_NAME_LENGTH
];
1631 char tmp_name
[MAX_DNS_NAME_LENGTH
];
1633 /* reverse lookups can be *very* expensive, and in many
1634 situations won't work because many networks don't link dhcp
1635 with dns. To avoid the delay we avoid the lookup if
1637 if (!lp_hostname_lookups() && (force_lookup
== false)) {
1638 length
= sizeof(nc
.ss
);
1639 nc
.name
= get_peer_addr_internal(fd
, addr_buf
, sizeof(addr_buf
),
1640 (struct sockaddr
*)&nc
.ss
, &length
);
1643 return nc
.name
? nc
.name
: "UNKNOWN";
1648 memset(&ss
, '\0', sizeof(ss
));
1649 p
= get_peer_addr_internal(fd
, addr_buf
, sizeof(addr_buf
), (struct sockaddr
*)&ss
, &length
);
1651 /* it might be the same as the last one - save some DNS work */
1652 if (sockaddr_equal((struct sockaddr
*)&ss
, (struct sockaddr
*)&nc
.ss
)) {
1653 return nc
.name
? nc
.name
: "UNKNOWN";
1656 /* Not the same. We need to lookup. */
1661 /* Look up the remote host name. */
1662 ret
= sys_getnameinfo((struct sockaddr
*)&ss
,
1671 DEBUG(1,("get_peer_name: getnameinfo failed "
1672 "for %s with error %s\n",
1674 gai_strerror(ret
)));
1675 strlcpy(name_buf
, p
, sizeof(name_buf
));
1677 if (!matchname(name_buf
, (struct sockaddr
*)&ss
, length
)) {
1678 DEBUG(0,("Matchname failed on %s %s\n",name_buf
,p
));
1679 strlcpy(name_buf
,"UNKNOWN",sizeof(name_buf
));
1683 /* can't pass the same source and dest strings in when you
1684 use --enable-developer or the clobber_region() call will
1687 strlcpy(tmp_name
, name_buf
, sizeof(tmp_name
));
1688 alpha_strcpy(name_buf
, tmp_name
, "_-.", sizeof(name_buf
));
1689 if (strstr(name_buf
,"..")) {
1690 strlcpy(name_buf
, "UNKNOWN", sizeof(name_buf
));
1698 return nc
.name
? nc
.name
: "UNKNOWN";
1701 /*******************************************************************
1702 Return the IP addr of the remote end of a socket as a string.
1703 ******************************************************************/
1705 const char *get_peer_addr(int fd
, char *addr
, size_t addr_len
)
1707 return get_peer_addr_internal(fd
, addr
, addr_len
, NULL
, NULL
);
1710 /*******************************************************************
1711 Create protected unix domain socket.
1713 Some unixes cannot set permissions on a ux-dom-sock, so we
1714 have to make sure that the directory contains the protection
1715 permissions instead.
1716 ******************************************************************/
1718 int create_pipe_sock(const char *socket_dir
,
1719 const char *socket_name
,
1722 #ifdef HAVE_UNIXSOCKET
1723 struct sockaddr_un sunaddr
;
1729 old_umask
= umask(0);
1731 /* Create the socket directory or reuse the existing one */
1733 if (lstat(socket_dir
, &st
) == -1) {
1734 if (errno
== ENOENT
) {
1735 /* Create directory */
1736 if (mkdir(socket_dir
, dir_perms
) == -1) {
1737 DEBUG(0, ("error creating socket directory "
1738 "%s: %s\n", socket_dir
,
1743 DEBUG(0, ("lstat failed on socket directory %s: %s\n",
1744 socket_dir
, strerror(errno
)));
1748 /* Check ownership and permission on existing directory */
1749 if (!S_ISDIR(st
.st_mode
)) {
1750 DEBUG(0, ("socket directory %s isn't a directory\n",
1754 if ((st
.st_uid
!= sec_initial_uid()) ||
1755 ((st
.st_mode
& 0777) != dir_perms
)) {
1756 DEBUG(0, ("invalid permissions on socket directory "
1757 "%s\n", socket_dir
));
1762 /* Create the socket file */
1764 sock
= socket(AF_UNIX
, SOCK_STREAM
, 0);
1767 DEBUG(0, ("create_pipe_sock: socket error %s\n",
1772 if (asprintf(&path
, "%s/%s", socket_dir
, socket_name
) == -1) {
1777 memset(&sunaddr
, 0, sizeof(sunaddr
));
1778 sunaddr
.sun_family
= AF_UNIX
;
1779 strlcpy(sunaddr
.sun_path
, path
, sizeof(sunaddr
.sun_path
));
1781 if (bind(sock
, (struct sockaddr
*)&sunaddr
, sizeof(sunaddr
)) == -1) {
1782 DEBUG(0, ("bind failed on pipe socket %s: %s\n", path
,
1787 if (listen(sock
, 5) == -1) {
1788 DEBUG(0, ("listen failed on pipe socket %s: %s\n", path
,
1808 DEBUG(0, ("create_pipe_sock: No Unix sockets on this system\n"));
1810 #endif /* HAVE_UNIXSOCKET */
1813 /****************************************************************************
1814 Get my own canonical name, including domain.
1815 ****************************************************************************/
1817 const char *get_mydnsfullname(void)
1819 struct addrinfo
*res
= NULL
;
1820 char my_hostname
[HOST_NAME_MAX
];
1824 if (memcache_lookup(NULL
, SINGLETON_CACHE
,
1825 data_blob_string_const_null("get_mydnsfullname"),
1827 SMB_ASSERT(tmp
.length
> 0);
1828 return (const char *)tmp
.data
;
1831 /* get my host name */
1832 if (gethostname(my_hostname
, sizeof(my_hostname
)) == -1) {
1833 DEBUG(0,("get_mydnsfullname: gethostname failed\n"));
1837 /* Ensure null termination. */
1838 my_hostname
[sizeof(my_hostname
)-1] = '\0';
1840 ret
= interpret_string_addr_internal(&res
,
1842 AI_ADDRCONFIG
|AI_CANONNAME
);
1844 if (!ret
|| res
== NULL
) {
1845 DEBUG(3,("get_mydnsfullname: getaddrinfo failed for "
1848 gai_strerror(ret
) ));
1853 * Make sure that getaddrinfo() returns the "correct" host name.
1856 if (res
->ai_canonname
== NULL
) {
1857 DEBUG(3,("get_mydnsfullname: failed to get "
1858 "canonical name for %s\n",
1864 /* This copies the data, so we must do a lookup
1865 * afterwards to find the value to return.
1868 memcache_add(NULL
, SINGLETON_CACHE
,
1869 data_blob_string_const_null("get_mydnsfullname"),
1870 data_blob_string_const_null(res
->ai_canonname
));
1872 if (!memcache_lookup(NULL
, SINGLETON_CACHE
,
1873 data_blob_string_const_null("get_mydnsfullname"),
1875 tmp
= data_blob_talloc(talloc_tos(), res
->ai_canonname
,
1876 strlen(res
->ai_canonname
) + 1);
1881 return (const char *)tmp
.data
;
1884 /************************************************************
1886 ************************************************************/
1888 bool is_myname_or_ipaddr(const char *s
)
1890 TALLOC_CTX
*ctx
= talloc_tos();
1891 char addr
[INET6_ADDRSTRLEN
];
1893 const char *dnsname
;
1894 char *servername
= NULL
;
1900 /* Santize the string from '\\name' */
1901 name
= talloc_strdup(ctx
, s
);
1906 servername
= strrchr_m(name
, '\\' );
1913 /* Optimize for the common case */
1914 if (strequal(servername
, global_myname())) {
1918 /* Check for an alias */
1919 if (is_myname(servername
)) {
1923 /* Check for loopback */
1924 if (strequal(servername
, "127.0.0.1") ||
1925 strequal(servername
, "::1")) {
1929 if (strequal(servername
, "localhost")) {
1933 /* Maybe it's my dns name */
1934 dnsname
= get_mydnsfullname();
1935 if (dnsname
&& strequal(servername
, dnsname
)) {
1939 /* Handle possible CNAME records - convert to an IP addr. */
1940 if (!is_ipaddress(servername
)) {
1941 /* Use DNS to resolve the name, but only the first address */
1942 struct sockaddr_storage ss
;
1943 if (interpret_string_addr(&ss
, servername
, 0)) {
1944 print_sockaddr(addr
,
1951 /* Maybe its an IP address? */
1952 if (is_ipaddress(servername
)) {
1953 struct sockaddr_storage ss
;
1954 struct iface_struct
*nics
;
1957 if (!interpret_string_addr(&ss
, servername
, AI_NUMERICHOST
)) {
1961 if (ismyaddr((struct sockaddr
*)&ss
)) {
1965 if (is_zero_addr((struct sockaddr
*)&ss
) ||
1966 is_loopback_addr((struct sockaddr
*)&ss
)) {
1970 n
= get_interfaces(talloc_tos(), &nics
);
1971 for (i
=0; i
<n
; i
++) {
1972 if (sockaddr_equal((struct sockaddr
*)&nics
[i
].ip
, (struct sockaddr
*)&ss
)) {
1984 struct getaddrinfo_state
{
1986 const char *service
;
1987 const struct addrinfo
*hints
;
1988 struct addrinfo
*res
;
1992 static void getaddrinfo_do(void *private_data
);
1993 static void getaddrinfo_done(struct tevent_req
*subreq
);
1995 struct tevent_req
*getaddrinfo_send(TALLOC_CTX
*mem_ctx
,
1996 struct tevent_context
*ev
,
1997 struct fncall_context
*ctx
,
1999 const char *service
,
2000 const struct addrinfo
*hints
)
2002 struct tevent_req
*req
, *subreq
;
2003 struct getaddrinfo_state
*state
;
2005 req
= tevent_req_create(mem_ctx
, &state
, struct getaddrinfo_state
);
2011 state
->service
= service
;
2012 state
->hints
= hints
;
2014 subreq
= fncall_send(state
, ev
, ctx
, getaddrinfo_do
, state
);
2015 if (tevent_req_nomem(subreq
, req
)) {
2016 return tevent_req_post(req
, ev
);
2018 tevent_req_set_callback(subreq
, getaddrinfo_done
, req
);
2022 static void getaddrinfo_do(void *private_data
)
2024 struct getaddrinfo_state
*state
=
2025 (struct getaddrinfo_state
*)private_data
;
2027 state
->ret
= getaddrinfo(state
->node
, state
->service
, state
->hints
,
2031 static void getaddrinfo_done(struct tevent_req
*subreq
)
2033 struct tevent_req
*req
= tevent_req_callback_data(
2034 subreq
, struct tevent_req
);
2037 ret
= fncall_recv(subreq
, &err
);
2038 TALLOC_FREE(subreq
);
2040 tevent_req_error(req
, err
);
2043 tevent_req_done(req
);
2046 int getaddrinfo_recv(struct tevent_req
*req
, struct addrinfo
**res
)
2048 struct getaddrinfo_state
*state
= tevent_req_data(
2049 req
, struct getaddrinfo_state
);
2052 if (tevent_req_is_unix_error(req
, &err
)) {
2060 if (state
->ret
== 0) {