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 1992-2005
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 2 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, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 /* the following 3 client_*() functions are nasty ways of allowing
26 some generic functions to get info that really should be hidden in
28 static int client_fd
= -1;
29 /* What to print out on a client disconnect error. */
30 static char client_ip_string
[16];
32 void client_setfd(int fd
)
35 safe_strcpy(client_ip_string
, get_peer_addr(client_fd
), sizeof(client_ip_string
)-1);
38 static char *get_socket_addr(int fd
)
41 struct sockaddr_in
*sockin
= (struct sockaddr_in
*) (&sa
);
42 socklen_t length
= sizeof(sa
);
43 static fstring addr_buf
;
45 fstrcpy(addr_buf
,"0.0.0.0");
51 if (getsockname(fd
, &sa
, &length
) < 0) {
52 DEBUG(0,("getsockname failed. Error was %s\n", strerror(errno
) ));
56 fstrcpy(addr_buf
,(char *)inet_ntoa(sockin
->sin_addr
));
61 static int get_socket_port(int fd
)
64 struct sockaddr_in
*sockin
= (struct sockaddr_in
*) (&sa
);
65 socklen_t length
= sizeof(sa
);
70 if (getsockname(fd
, &sa
, &length
) < 0) {
71 DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno
) ));
75 return ntohs(sockin
->sin_port
);
78 char *client_name(void)
80 return get_peer_name(client_fd
,False
);
83 char *client_addr(void)
85 return get_peer_addr(client_fd
);
88 char *client_socket_addr(void)
90 return get_socket_addr(client_fd
);
93 int client_socket_port(void)
95 return get_socket_port(client_fd
);
98 struct in_addr
*client_inaddr(struct sockaddr
*sa
)
100 struct sockaddr_in
*sockin
= (struct sockaddr_in
*) (sa
);
101 socklen_t length
= sizeof(*sa
);
103 if (getpeername(client_fd
, sa
, &length
) < 0) {
104 DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno
) ));
108 return &sockin
->sin_addr
;
111 /* the last IP received from */
112 struct in_addr lastip
;
114 /* the last port received from */
117 int smb_read_error
= 0;
119 /****************************************************************************
120 Determine if a file descriptor is in fact a socket.
121 ****************************************************************************/
123 BOOL
is_a_socket(int fd
)
128 return(getsockopt(fd
, SOL_SOCKET
, SO_TYPE
, (char *)&v
, &l
) == 0);
131 enum SOCK_OPT_TYPES
{OPT_BOOL
,OPT_INT
,OPT_ON
};
133 typedef struct smb_socket_option
{
141 static const smb_socket_option socket_options
[] = {
142 {"SO_KEEPALIVE", SOL_SOCKET
, SO_KEEPALIVE
, 0, OPT_BOOL
},
143 {"SO_REUSEADDR", SOL_SOCKET
, SO_REUSEADDR
, 0, OPT_BOOL
},
144 {"SO_BROADCAST", SOL_SOCKET
, SO_BROADCAST
, 0, OPT_BOOL
},
146 {"TCP_NODELAY", IPPROTO_TCP
, TCP_NODELAY
, 0, OPT_BOOL
},
149 {"TCP_KEEPCNT", IPPROTO_TCP
, TCP_KEEPCNT
, 0, OPT_INT
},
152 {"TCP_KEEPIDLE", IPPROTO_TCP
, TCP_KEEPIDLE
, 0, OPT_INT
},
155 {"TCP_KEEPINTVL", IPPROTO_TCP
, TCP_KEEPINTVL
, 0, OPT_INT
},
157 #ifdef IPTOS_LOWDELAY
158 {"IPTOS_LOWDELAY", IPPROTO_IP
, IP_TOS
, IPTOS_LOWDELAY
, OPT_ON
},
160 #ifdef IPTOS_THROUGHPUT
161 {"IPTOS_THROUGHPUT", IPPROTO_IP
, IP_TOS
, IPTOS_THROUGHPUT
, OPT_ON
},
164 {"SO_REUSEPORT", SOL_SOCKET
, SO_REUSEPORT
, 0, OPT_BOOL
},
167 {"SO_SNDBUF", SOL_SOCKET
, SO_SNDBUF
, 0, OPT_INT
},
170 {"SO_RCVBUF", SOL_SOCKET
, SO_RCVBUF
, 0, OPT_INT
},
173 {"SO_SNDLOWAT", SOL_SOCKET
, SO_SNDLOWAT
, 0, OPT_INT
},
176 {"SO_RCVLOWAT", SOL_SOCKET
, SO_RCVLOWAT
, 0, OPT_INT
},
179 {"SO_SNDTIMEO", SOL_SOCKET
, SO_SNDTIMEO
, 0, OPT_INT
},
182 {"SO_RCVTIMEO", SOL_SOCKET
, SO_RCVTIMEO
, 0, OPT_INT
},
186 /****************************************************************************
187 Print socket options.
188 ****************************************************************************/
190 static void print_socket_options(int s
)
194 const smb_socket_option
*p
= &socket_options
[0];
196 /* wrapped in if statement to prevent streams leak in SCO Openserver 5.0 */
197 /* reported on samba-technical --jerry */
198 if ( DEBUGLEVEL
>= 5 ) {
199 for (; p
->name
!= NULL
; p
++) {
200 if (getsockopt(s
, p
->level
, p
->option
, (void *)&value
, &vlen
) == -1) {
201 DEBUG(5,("Could not test socket option %s.\n", p
->name
));
203 DEBUG(5,("socket option %s = %d\n",p
->name
,value
));
209 /****************************************************************************
210 Set user socket options.
211 ****************************************************************************/
213 void set_socket_options(int fd
, const char *options
)
217 while (next_token(&options
,tok
," \t,", sizeof(tok
))) {
221 BOOL got_value
= False
;
223 if ((p
= strchr_m(tok
,'='))) {
229 for (i
=0;socket_options
[i
].name
;i
++)
230 if (strequal(socket_options
[i
].name
,tok
))
233 if (!socket_options
[i
].name
) {
234 DEBUG(0,("Unknown socket option %s\n",tok
));
238 switch (socket_options
[i
].opttype
) {
241 ret
= setsockopt(fd
,socket_options
[i
].level
,
242 socket_options
[i
].option
,(char *)&value
,sizeof(int));
247 DEBUG(0,("syntax error - %s does not take a value\n",tok
));
250 int on
= socket_options
[i
].value
;
251 ret
= setsockopt(fd
,socket_options
[i
].level
,
252 socket_options
[i
].option
,(char *)&on
,sizeof(int));
258 DEBUG(0,("Failed to set socket option %s (Error %s)\n",tok
, strerror(errno
) ));
261 print_socket_options(fd
);
264 /****************************************************************************
266 ****************************************************************************/
268 ssize_t
read_udp_socket(int fd
,char *buf
,size_t len
)
271 struct sockaddr_in sock
;
272 socklen_t socklen
= sizeof(sock
);
274 memset((char *)&sock
,'\0',socklen
);
275 memset((char *)&lastip
,'\0',sizeof(lastip
));
276 ret
= (ssize_t
)sys_recvfrom(fd
,buf
,len
,0,(struct sockaddr
*)&sock
,&socklen
);
278 DEBUG(2,("read socket failed. ERRNO=%s\n",strerror(errno
)));
282 lastip
= sock
.sin_addr
;
283 lastport
= ntohs(sock
.sin_port
);
285 DEBUG(10,("read_udp_socket: lastip %s lastport %d read: %lu\n",
286 inet_ntoa(lastip
), lastport
, (unsigned long)ret
));
293 Socket routines from HEAD
- maybe re
-enable in future
. JRA
.
295 /****************************************************************************
296 Work out if we've timed out.
297 ****************************************************************************/
299 static BOOL
timeout_until(struct timeval
*timeout
, const struct timeval
*endtime
)
306 t_dif
= usec_time_diff(endtime
, &now
);
311 timeout
->tv_sec
= (t_dif
/ (SMB_BIG_INT
)1000000);
312 timeout
->tv_usec
= (t_dif
% (SMB_BIG_INT
)1000000);
316 /****************************************************************************
317 Read data from the client, reading exactly N bytes, or until endtime timeout.
318 Use with a non-blocking socket if endtime != NULL.
319 ****************************************************************************/
321 ssize_t
read_data_until(int fd
,char *buffer
,size_t N
, const struct timeval
*endtime
)
330 if (endtime
!= NULL
) {
332 struct timeval timeout
;
335 if (!timeout_until(&timeout
, endtime
)) {
336 DEBUG(10,("read_data_until: read timed out\n"));
337 smb_read_error
= READ_TIMEOUT
;
344 /* Select but ignore EINTR. */
345 selrtn
= sys_select_intr(fd
+1, &r_fds
, NULL
, NULL
, &timeout
);
347 /* something is wrong. Maybe the socket is dead? */
348 DEBUG(0,("read_data_until: select error = %s.\n", strerror(errno
) ));
349 smb_read_error
= READ_ERROR
;
353 /* Did we timeout ? */
355 DEBUG(10,("read_data_until: select timed out.\n"));
356 smb_read_error
= READ_TIMEOUT
;
361 ret
= sys_read(fd
,buffer
+ total
,N
- total
);
364 DEBUG(10,("read_data_until: read of %d returned 0. Error = %s\n", (int)(N
- total
), strerror(errno
) ));
365 smb_read_error
= READ_EOF
;
370 if (errno
== EAGAIN
) {
371 /* Non-blocking socket with no data available. Try select again. */
374 DEBUG(0,("read_data_until: read failure for %d. Error = %s\n", (int)(N
- total
), strerror(errno
) ));
375 smb_read_error
= READ_ERROR
;
380 return (ssize_t
)total
;
384 /****************************************************************************
385 Read data from a socket with a timout in msec.
386 mincount = if timeout, minimum to read before returning
387 maxcount = number to be read.
388 time_out = timeout in milliseconds
389 ****************************************************************************/
391 ssize_t
read_socket_with_timeout(int fd
,char *buf
,size_t mincnt
,size_t maxcnt
,unsigned int time_out
)
397 struct timeval timeout
;
399 /* just checking .... */
411 while (nread
< mincnt
) {
412 readret
= sys_read(fd
, buf
+ nread
, maxcnt
- nread
);
415 DEBUG(5,("read_socket_with_timeout: blocking read. EOF from client.\n"));
416 smb_read_error
= READ_EOF
;
421 if (fd
== client_fd
) {
422 /* Try and give an error message saying what client failed. */
423 DEBUG(0,("read_socket_with_timeout: client %s read error = %s.\n",
424 client_ip_string
, strerror(errno
) ));
426 DEBUG(0,("read_socket_with_timeout: read error = %s.\n", strerror(errno
) ));
428 smb_read_error
= READ_ERROR
;
433 return((ssize_t
)nread
);
436 /* Most difficult - timeout read */
437 /* If this is ever called on a disk file and
438 mincnt is greater then the filesize then
439 system performance will suffer severely as
440 select always returns true on disk files */
442 /* Set initial timeout */
443 timeout
.tv_sec
= (time_t)(time_out
/ 1000);
444 timeout
.tv_usec
= (long)(1000 * (time_out
% 1000));
446 for (nread
=0; nread
< mincnt
; ) {
450 selrtn
= sys_select_intr(fd
+1,&fds
,NULL
,NULL
,&timeout
);
454 /* something is wrong. Maybe the socket is dead? */
455 if (fd
== client_fd
) {
456 /* Try and give an error message saying what client failed. */
457 DEBUG(0,("read_socket_with_timeout: timeout read for client %s. select error = %s.\n",
458 client_ip_string
, strerror(errno
) ));
460 DEBUG(0,("read_socket_with_timeout: timeout read. select error = %s.\n", strerror(errno
) ));
462 smb_read_error
= READ_ERROR
;
466 /* Did we timeout ? */
468 DEBUG(10,("read_socket_with_timeout: timeout read. select timed out.\n"));
469 smb_read_error
= READ_TIMEOUT
;
473 readret
= sys_read(fd
, buf
+nread
, maxcnt
-nread
);
476 /* we got EOF on the file descriptor */
477 DEBUG(5,("read_socket_with_timeout: timeout read. EOF from client.\n"));
478 smb_read_error
= READ_EOF
;
483 /* the descriptor is probably dead */
484 if (fd
== client_fd
) {
485 /* Try and give an error message saying what client failed. */
486 DEBUG(0,("read_socket_with_timeout: timeout read to client %s. read error = %s.\n",
487 client_ip_string
, strerror(errno
) ));
489 DEBUG(0,("read_socket_with_timeout: timeout read. read error = %s.\n", strerror(errno
) ));
491 smb_read_error
= READ_ERROR
;
498 /* Return the number we got */
499 return (ssize_t
)nread
;
502 /****************************************************************************
503 Read data from the client, reading exactly N bytes.
504 ****************************************************************************/
506 ssize_t
read_data(int fd
,char *buffer
,size_t N
)
514 ret
= sys_read(fd
,buffer
+ total
,N
- total
);
517 DEBUG(10,("read_data: read of %d returned 0. Error = %s\n", (int)(N
- total
), strerror(errno
) ));
518 smb_read_error
= READ_EOF
;
523 if (fd
== client_fd
) {
524 /* Try and give an error message saying what client failed. */
525 DEBUG(0,("read_data: read failure for %d bytes to client %s. Error = %s\n",
526 (int)(N
- total
), client_ip_string
, strerror(errno
) ));
528 DEBUG(0,("read_data: read failure for %d. Error = %s\n", (int)(N
- total
), strerror(errno
) ));
530 smb_read_error
= READ_ERROR
;
535 return (ssize_t
)total
;
538 /****************************************************************************
540 ****************************************************************************/
542 ssize_t
write_data(int fd
, const char *buffer
, size_t N
)
548 ret
= sys_write(fd
,buffer
+ total
,N
- total
);
551 if (fd
== client_fd
) {
552 /* Try and give an error message saying what client failed. */
553 DEBUG(0,("write_data: write failure in writing to client %s. Error %s\n",
554 client_ip_string
, strerror(errno
) ));
556 DEBUG(0,("write_data: write failure. Error = %s\n", strerror(errno
) ));
567 return (ssize_t
)total
;
570 /****************************************************************************
571 Send a keepalive packet (rfc1002).
572 ****************************************************************************/
574 BOOL
send_keepalive(int client
)
576 unsigned char buf
[4];
578 buf
[0] = SMBkeepalive
;
579 buf
[1] = buf
[2] = buf
[3] = 0;
581 return(write_data(client
,(char *)buf
,4) == 4);
585 /****************************************************************************
586 Read 4 bytes of a smb packet and return the smb length of the packet.
587 Store the result in the buffer.
588 This version of the function will return a length of zero on receiving
590 Timeout is in milliseconds.
591 ****************************************************************************/
593 static ssize_t
read_smb_length_return_keepalive(int fd
, char *inbuf
, unsigned int timeout
)
601 ok
= (read_socket_with_timeout(fd
,inbuf
,4,4,timeout
) == 4);
603 ok
= (read_data(fd
,inbuf
,4) == 4);
608 len
= smb_len(inbuf
);
609 msg_type
= CVAL(inbuf
,0);
611 if (msg_type
== SMBkeepalive
)
612 DEBUG(5,("Got keepalive packet\n"));
615 DEBUG(10,("got smb length of %lu\n",(unsigned long)len
));
620 /****************************************************************************
621 Read 4 bytes of a smb packet and return the smb length of the packet.
622 Store the result in the buffer. This version of the function will
623 never return a session keepalive (length of zero).
624 Timeout is in milliseconds.
625 ****************************************************************************/
627 ssize_t
read_smb_length(int fd
, char *inbuf
, unsigned int timeout
)
632 len
= read_smb_length_return_keepalive(fd
, inbuf
, timeout
);
637 /* Ignore session keepalives. */
638 if(CVAL(inbuf
,0) != SMBkeepalive
)
642 DEBUG(10,("read_smb_length: got smb length of %lu\n",
643 (unsigned long)len
));
648 /****************************************************************************
649 Read an smb from a fd. Note that the buffer *MUST* be of size
650 BUFFER_SIZE+SAFETY_MARGIN.
651 The timeout is in milliseconds.
652 This function will return on receipt of a session keepalive packet.
653 Doesn't check the MAC on signed packets.
654 ****************************************************************************/
656 BOOL
receive_smb_raw(int fd
, char *buffer
, unsigned int timeout
)
662 memset(buffer
,'\0',smb_size
+ 100);
664 len
= read_smb_length_return_keepalive(fd
,buffer
,timeout
);
666 DEBUG(10,("receive_smb_raw: length < 0!\n"));
669 * Correct fix. smb_read_error may have already been
670 * set. Only set it here if not already set. Global
671 * variables still suck :-). JRA.
674 if (smb_read_error
== 0)
675 smb_read_error
= READ_ERROR
;
680 * A WRITEX with CAP_LARGE_WRITEX can be 64k worth of data plus 65 bytes
681 * of header. Don't print the error if this fits.... JRA.
684 if (len
> (BUFFER_SIZE
+ LARGE_WRITEX_HDR_SIZE
)) {
685 DEBUG(0,("Invalid packet length! (%lu bytes).\n",(unsigned long)len
));
686 if (len
> BUFFER_SIZE
+ (SAFETY_MARGIN
/2)) {
689 * Correct fix. smb_read_error may have already been
690 * set. Only set it here if not already set. Global
691 * variables still suck :-). JRA.
694 if (smb_read_error
== 0)
695 smb_read_error
= READ_ERROR
;
702 ret
= read_socket_with_timeout(fd
,buffer
+4,len
,len
,timeout
);
704 ret
= read_data(fd
,buffer
+4,len
);
708 if (smb_read_error
== 0)
709 smb_read_error
= READ_ERROR
;
713 /* not all of samba3 properly checks for packet-termination of strings. This
714 ensures that we don't run off into empty space. */
715 SSVAL(buffer
+4,len
, 0);
721 /****************************************************************************
722 Wrapper for receive_smb_raw().
723 Checks the MAC on signed packets.
724 ****************************************************************************/
726 BOOL
receive_smb(int fd
, char *buffer
, unsigned int timeout
)
728 if (!receive_smb_raw(fd
, buffer
, timeout
)) {
732 /* Check the incoming SMB signature. */
733 if (!srv_check_sign_mac(buffer
, True
)) {
734 DEBUG(0, ("receive_smb: SMB Signature verification failed on incoming packet!\n"));
735 if (smb_read_error
== 0)
736 smb_read_error
= READ_BAD_SIG
;
743 /****************************************************************************
745 ****************************************************************************/
747 BOOL
send_smb(int fd
, char *buffer
)
753 /* Sign the outgoing packet if required. */
754 srv_calculate_sign_mac(buffer
);
756 len
= smb_len(buffer
) + 4;
758 while (nwritten
< len
) {
759 ret
= write_data(fd
,buffer
+nwritten
,len
- nwritten
);
761 DEBUG(0,("Error writing %d bytes to client. %d. (%s)\n",
762 (int)len
,(int)ret
, strerror(errno
) ));
771 /****************************************************************************
772 Open a socket of the specified type, port, and address for incoming data.
773 ****************************************************************************/
775 int open_socket_in( int type
, int port
, int dlevel
, uint32 socket_addr
, BOOL rebind
)
777 struct sockaddr_in sock
;
780 memset( (char *)&sock
, '\0', sizeof(sock
) );
782 #ifdef HAVE_SOCK_SIN_LEN
783 sock
.sin_len
= sizeof(sock
);
785 sock
.sin_port
= htons( port
);
786 sock
.sin_family
= AF_INET
;
787 sock
.sin_addr
.s_addr
= socket_addr
;
789 res
= socket( AF_INET
, type
, 0 );
792 dbgtext( "open_socket_in(): socket() call failed: " );
793 dbgtext( "%s\n", strerror( errno
) );
798 /* This block sets/clears the SO_REUSEADDR and possibly SO_REUSEPORT. */
800 int val
= rebind
? 1 : 0;
801 if( setsockopt(res
,SOL_SOCKET
,SO_REUSEADDR
,(char *)&val
,sizeof(val
)) == -1 ) {
802 if( DEBUGLVL( dlevel
) ) {
803 dbgtext( "open_socket_in(): setsockopt: " );
804 dbgtext( "SO_REUSEADDR = %s ", val
?"True":"False" );
805 dbgtext( "on port %d failed ", port
);
806 dbgtext( "with error = %s\n", strerror(errno
) );
810 if( setsockopt(res
,SOL_SOCKET
,SO_REUSEPORT
,(char *)&val
,sizeof(val
)) == -1 ) {
811 if( DEBUGLVL( dlevel
) ) {
812 dbgtext( "open_socket_in(): setsockopt: ");
813 dbgtext( "SO_REUSEPORT = %s ", val
?"True":"False" );
814 dbgtext( "on port %d failed ", port
);
815 dbgtext( "with error = %s\n", strerror(errno
) );
818 #endif /* SO_REUSEPORT */
821 /* now we've got a socket - we need to bind it */
822 if( bind( res
, (struct sockaddr
*)&sock
, sizeof(sock
) ) == -1 ) {
823 if( DEBUGLVL(dlevel
) && (port
== SMB_PORT1
|| port
== SMB_PORT2
|| port
== NMB_PORT
) ) {
824 dbgtext( "bind failed on port %d ", port
);
825 dbgtext( "socket_addr = %s.\n", inet_ntoa( sock
.sin_addr
) );
826 dbgtext( "Error = %s\n", strerror(errno
) );
832 DEBUG( 10, ( "bind succeeded on port %d\n", port
) );
837 /****************************************************************************
838 Create an outgoing socket. timeout is in milliseconds.
839 **************************************************************************/
841 int open_socket_out(int type
, struct in_addr
*addr
, int port
,int timeout
)
843 struct sockaddr_in sock_out
;
845 int connect_loop
= 10;
848 /* create a socket to write to */
849 res
= socket(PF_INET
, type
, 0);
851 DEBUG(0,("socket error (%s)\n", strerror(errno
)));
855 if (type
!= SOCK_STREAM
)
858 memset((char *)&sock_out
,'\0',sizeof(sock_out
));
859 putip((char *)&sock_out
.sin_addr
,(char *)addr
);
861 sock_out
.sin_port
= htons( port
);
862 sock_out
.sin_family
= PF_INET
;
864 /* set it non-blocking */
865 set_blocking(res
,False
);
867 DEBUG(3,("Connecting to %s at port %d\n",inet_ntoa(*addr
),port
));
869 /* and connect it to the destination */
872 ret
= connect(res
,(struct sockaddr
*)&sock_out
,sizeof(sock_out
));
874 /* Some systems return EAGAIN when they mean EINPROGRESS */
875 if (ret
< 0 && (errno
== EINPROGRESS
|| errno
== EALREADY
||
876 errno
== EAGAIN
) && (connect_loop
< timeout
) ) {
877 smb_msleep(connect_loop
);
878 timeout
-= connect_loop
;
879 connect_loop
+= increment
;
880 if (increment
< 250) {
881 /* After 8 rounds we end up at a max of 255 msec */
887 if (ret
< 0 && (errno
== EINPROGRESS
|| errno
== EALREADY
||
889 DEBUG(1,("timeout connecting to %s:%d\n",inet_ntoa(*addr
),port
));
896 if (ret
< 0 && errno
== EISCONN
) {
903 DEBUG(2,("error connecting to %s:%d (%s)\n",
904 inet_ntoa(*addr
),port
,strerror(errno
)));
909 /* set it blocking again */
910 set_blocking(res
,True
);
915 /****************************************************************************
916 Create an outgoing TCP socket to any of the addrs. This is for
917 simultaneous connects to port 445 and 139 of a host or even a variety
918 of DC's all of which are equivalent for our purposes.
919 **************************************************************************/
921 BOOL
open_any_socket_out(struct sockaddr_in
*addrs
, int num_addrs
,
922 int timeout
, int *fd_index
, int *fd
)
924 int i
, resulting_index
, res
;
928 fd_set r_fds
, wr_fds
;
932 int connect_loop
= 10000; /* 10 milliseconds */
934 timeout
*= 1000; /* convert to microseconds */
936 sockets
= SMB_MALLOC_ARRAY(int, num_addrs
);
941 resulting_index
= -1;
943 for (i
=0; i
<num_addrs
; i
++)
946 for (i
=0; i
<num_addrs
; i
++) {
947 sockets
[i
] = socket(PF_INET
, SOCK_STREAM
, 0);
950 set_blocking(sockets
[i
], False
);
954 good_connect
= False
;
956 for (i
=0; i
<num_addrs
; i
++) {
958 if (sockets
[i
] == -1)
961 if (connect(sockets
[i
], (struct sockaddr
*)&(addrs
[i
]),
962 sizeof(*addrs
)) == 0) {
963 /* Rather unlikely as we are non-blocking, but it
964 * might actually happen. */
969 if (errno
== EINPROGRESS
|| errno
== EALREADY
||
971 /* These are the error messages that something is
974 } else if (errno
!= 0) {
975 /* There was a direct error */
982 /* All of the connect's resulted in real error conditions */
986 /* Lets see if any of the connect attempts succeeded */
992 for (i
=0; i
<num_addrs
; i
++) {
993 if (sockets
[i
] == -1)
995 FD_SET(sockets
[i
], &wr_fds
);
996 FD_SET(sockets
[i
], &r_fds
);
997 if (sockets
[i
]>maxfd
)
1002 tv
.tv_usec
= connect_loop
;
1004 res
= sys_select(maxfd
+1, &r_fds
, &wr_fds
, NULL
, &tv
);
1012 for (i
=0; i
<num_addrs
; i
++) {
1014 if (sockets
[i
] == -1)
1017 /* Stevens, Network Programming says that if there's a
1018 * successful connect, the socket is only writable. Upon an
1019 * error, it's both readable and writable. */
1021 if (FD_ISSET(sockets
[i
], &r_fds
) &&
1022 FD_ISSET(sockets
[i
], &wr_fds
)) {
1023 /* readable and writable, so it's an error */
1029 if (!FD_ISSET(sockets
[i
], &r_fds
) &&
1030 FD_ISSET(sockets
[i
], &wr_fds
)) {
1031 /* Only writable, so it's connected */
1032 resulting_index
= i
;
1039 timeout
-= connect_loop
;
1042 connect_loop
*= 1.5;
1043 if (connect_loop
> timeout
)
1044 connect_loop
= timeout
;
1048 for (i
=0; i
<num_addrs
; i
++) {
1049 if (i
== resulting_index
)
1051 if (sockets
[i
] >= 0)
1055 if (resulting_index
>= 0) {
1056 *fd_index
= resulting_index
;
1057 *fd
= sockets
[*fd_index
];
1058 set_blocking(*fd
, True
);
1063 return (resulting_index
>= 0);
1065 /****************************************************************************
1066 Open a connected UDP socket to host on port
1067 **************************************************************************/
1069 int open_udp_socket(const char *host
, int port
)
1071 int type
= SOCK_DGRAM
;
1072 struct sockaddr_in sock_out
;
1074 struct in_addr
*addr
;
1076 addr
= interpret_addr2(host
);
1078 res
= socket(PF_INET
, type
, 0);
1083 memset((char *)&sock_out
,'\0',sizeof(sock_out
));
1084 putip((char *)&sock_out
.sin_addr
,(char *)addr
);
1085 sock_out
.sin_port
= htons(port
);
1086 sock_out
.sin_family
= PF_INET
;
1088 if (connect(res
,(struct sockaddr
*)&sock_out
,sizeof(sock_out
))) {
1097 /*******************************************************************
1098 Matchname - determine if host name matches IP address. Used to
1099 confirm a hostname lookup to prevent spoof attacks.
1100 ******************************************************************/
1102 static BOOL
matchname(char *remotehost
,struct in_addr addr
)
1107 if ((hp
= sys_gethostbyname(remotehost
)) == 0) {
1108 DEBUG(0,("sys_gethostbyname(%s): lookup failure.\n", remotehost
));
1113 * Make sure that gethostbyname() returns the "correct" host name.
1114 * Unfortunately, gethostbyname("localhost") sometimes yields
1115 * "localhost.domain". Since the latter host name comes from the
1116 * local DNS, we just have to trust it (all bets are off if the local
1117 * DNS is perverted). We always check the address list, though.
1120 if (!strequal(remotehost
, hp
->h_name
)
1121 && !strequal(remotehost
, "localhost")) {
1122 DEBUG(0,("host name/name mismatch: %s != %s\n",
1123 remotehost
, hp
->h_name
));
1127 /* Look up the host address in the address list we just got. */
1128 for (i
= 0; hp
->h_addr_list
[i
]; i
++) {
1129 if (memcmp(hp
->h_addr_list
[i
], (char *) & addr
, sizeof(addr
)) == 0)
1134 * The host name does not map to the original host address. Perhaps
1135 * someone has compromised a name server. More likely someone botched
1136 * it, but that could be dangerous, too.
1139 DEBUG(0,("host name/address mismatch: %s != %s\n",
1140 inet_ntoa(addr
), hp
->h_name
));
1144 /*******************************************************************
1145 Return the DNS name of the remote end of a socket.
1146 ******************************************************************/
1148 char *get_peer_name(int fd
, BOOL force_lookup
)
1150 static pstring name_buf
;
1152 static fstring addr_buf
;
1154 struct in_addr addr
;
1157 /* reverse lookups can be *very* expensive, and in many
1158 situations won't work because many networks don't link dhcp
1159 with dns. To avoid the delay we avoid the lookup if
1161 if (!lp_hostname_lookups() && (force_lookup
== False
)) {
1162 return get_peer_addr(fd
);
1165 p
= get_peer_addr(fd
);
1167 /* it might be the same as the last one - save some DNS work */
1168 if (strcmp(p
, addr_buf
) == 0)
1171 pstrcpy(name_buf
,"UNKNOWN");
1175 fstrcpy(addr_buf
, p
);
1177 addr
= *interpret_addr2(p
);
1179 /* Look up the remote host name. */
1180 if ((hp
= gethostbyaddr((char *)&addr
.s_addr
, sizeof(addr
.s_addr
), AF_INET
)) == 0) {
1181 DEBUG(1,("Gethostbyaddr failed for %s\n",p
));
1182 pstrcpy(name_buf
, p
);
1184 pstrcpy(name_buf
,(char *)hp
->h_name
);
1185 if (!matchname(name_buf
, addr
)) {
1186 DEBUG(0,("Matchname failed on %s %s\n",name_buf
,p
));
1187 pstrcpy(name_buf
,"UNKNOWN");
1191 /* can't pass the same source and dest strings in when you
1192 use --enable-developer or the clobber_region() call will
1195 pstrcpy( tmp_name
, name_buf
);
1196 alpha_strcpy(name_buf
, tmp_name
, "_-.", sizeof(name_buf
));
1197 if (strstr(name_buf
,"..")) {
1198 pstrcpy(name_buf
, "UNKNOWN");
1204 /*******************************************************************
1205 Return the IP addr of the remote end of a socket as a string.
1206 ******************************************************************/
1208 char *get_peer_addr(int fd
)
1211 struct sockaddr_in
*sockin
= (struct sockaddr_in
*) (&sa
);
1212 socklen_t length
= sizeof(sa
);
1213 static fstring addr_buf
;
1215 fstrcpy(addr_buf
,"0.0.0.0");
1221 if (getpeername(fd
, &sa
, &length
) < 0) {
1222 DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno
) ));
1226 fstrcpy(addr_buf
,(char *)inet_ntoa(sockin
->sin_addr
));
1231 /*******************************************************************
1232 Create protected unix domain socket.
1234 Some unixes cannot set permissions on a ux-dom-sock, so we
1235 have to make sure that the directory contains the protection
1236 permissions instead.
1237 ******************************************************************/
1239 int create_pipe_sock(const char *socket_dir
,
1240 const char *socket_name
,
1243 #ifdef HAVE_UNIXSOCKET
1244 struct sockaddr_un sunaddr
;
1250 old_umask
= umask(0);
1252 /* Create the socket directory or reuse the existing one */
1254 if (lstat(socket_dir
, &st
) == -1) {
1255 if (errno
== ENOENT
) {
1256 /* Create directory */
1257 if (mkdir(socket_dir
, dir_perms
) == -1) {
1258 DEBUG(0, ("error creating socket directory "
1259 "%s: %s\n", socket_dir
,
1264 DEBUG(0, ("lstat failed on socket directory %s: %s\n",
1265 socket_dir
, strerror(errno
)));
1269 /* Check ownership and permission on existing directory */
1270 if (!S_ISDIR(st
.st_mode
)) {
1271 DEBUG(0, ("socket directory %s isn't a directory\n",
1275 if ((st
.st_uid
!= sec_initial_uid()) ||
1276 ((st
.st_mode
& 0777) != dir_perms
)) {
1277 DEBUG(0, ("invalid permissions on socket directory "
1278 "%s\n", socket_dir
));
1283 /* Create the socket file */
1285 sock
= socket(AF_UNIX
, SOCK_STREAM
, 0);
1292 pstr_sprintf(path
, "%s/%s", socket_dir
, socket_name
);
1295 memset(&sunaddr
, 0, sizeof(sunaddr
));
1296 sunaddr
.sun_family
= AF_UNIX
;
1297 safe_strcpy(sunaddr
.sun_path
, path
, sizeof(sunaddr
.sun_path
)-1);
1299 if (bind(sock
, (struct sockaddr
*)&sunaddr
, sizeof(sunaddr
)) == -1) {
1300 DEBUG(0, ("bind failed on pipe socket %s: %s\n", path
,
1305 if (listen(sock
, 5) == -1) {
1306 DEBUG(0, ("listen failed on pipe socket %s: %s\n", path
,
1322 DEBUG(0, ("create_pipe_sock: No Unix sockets on this system\n"));
1324 #endif /* HAVE_UNIXSOCKET */