2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Tim Potter 2000-2001
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 /* the last IP received from */
25 struct in_addr lastip
;
27 /* the last port received from */
30 int smb_read_error
= 0;
32 static char *get_socket_addr(int fd
)
35 struct sockaddr_in
*sockin
= (struct sockaddr_in
*) (&sa
);
36 socklen_t length
= sizeof(sa
);
37 static fstring addr_buf
;
39 fstrcpy(addr_buf
,"0.0.0.0");
45 if (getsockname(fd
, &sa
, &length
) < 0) {
46 DEBUG(0,("getsockname failed. Error was %s\n", strerror(errno
) ));
50 fstrcpy(addr_buf
,(char *)inet_ntoa(sockin
->sin_addr
));
55 static int get_socket_port(int fd
)
58 struct sockaddr_in
*sockin
= (struct sockaddr_in
*) (&sa
);
59 socklen_t length
= sizeof(sa
);
64 if (getsockname(fd
, &sa
, &length
) < 0) {
65 DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno
) ));
69 return ntohs(sockin
->sin_port
);
72 /****************************************************************************
73 Determine if a file descriptor is in fact a socket.
74 ****************************************************************************/
76 BOOL
is_a_socket(int fd
)
81 return(getsockopt(fd
, SOL_SOCKET
, SO_TYPE
, (char *)&v
, &l
) == 0);
84 enum SOCK_OPT_TYPES
{OPT_BOOL
,OPT_INT
,OPT_ON
};
86 typedef struct smb_socket_option
{
94 static const smb_socket_option socket_options
[] = {
95 {"SO_KEEPALIVE", SOL_SOCKET
, SO_KEEPALIVE
, 0, OPT_BOOL
},
96 {"SO_REUSEADDR", SOL_SOCKET
, SO_REUSEADDR
, 0, OPT_BOOL
},
97 {"SO_BROADCAST", SOL_SOCKET
, SO_BROADCAST
, 0, OPT_BOOL
},
99 {"TCP_NODELAY", IPPROTO_TCP
, TCP_NODELAY
, 0, OPT_BOOL
},
102 {"TCP_KEEPCNT", IPPROTO_TCP
, TCP_KEEPCNT
, 0, OPT_INT
},
105 {"TCP_KEEPIDLE", IPPROTO_TCP
, TCP_KEEPIDLE
, 0, OPT_INT
},
108 {"TCP_KEEPINTVL", IPPROTO_TCP
, TCP_KEEPINTVL
, 0, OPT_INT
},
110 #ifdef IPTOS_LOWDELAY
111 {"IPTOS_LOWDELAY", IPPROTO_IP
, IP_TOS
, IPTOS_LOWDELAY
, OPT_ON
},
113 #ifdef IPTOS_THROUGHPUT
114 {"IPTOS_THROUGHPUT", IPPROTO_IP
, IP_TOS
, IPTOS_THROUGHPUT
, OPT_ON
},
117 {"SO_REUSEPORT", SOL_SOCKET
, SO_REUSEPORT
, 0, OPT_BOOL
},
120 {"SO_SNDBUF", SOL_SOCKET
, SO_SNDBUF
, 0, OPT_INT
},
123 {"SO_RCVBUF", SOL_SOCKET
, SO_RCVBUF
, 0, OPT_INT
},
126 {"SO_SNDLOWAT", SOL_SOCKET
, SO_SNDLOWAT
, 0, OPT_INT
},
129 {"SO_RCVLOWAT", SOL_SOCKET
, SO_RCVLOWAT
, 0, OPT_INT
},
132 {"SO_SNDTIMEO", SOL_SOCKET
, SO_SNDTIMEO
, 0, OPT_INT
},
135 {"SO_RCVTIMEO", SOL_SOCKET
, SO_RCVTIMEO
, 0, OPT_INT
},
139 /****************************************************************************
140 Print socket options.
141 ****************************************************************************/
143 static void print_socket_options(int s
)
147 const smb_socket_option
*p
= &socket_options
[0];
149 /* wrapped in if statement to prevent streams leak in SCO Openserver 5.0 */
150 /* reported on samba-technical --jerry */
151 if ( DEBUGLEVEL
>= 5 ) {
152 for (; p
->name
!= NULL
; p
++) {
153 if (getsockopt(s
, p
->level
, p
->option
, (void *)&value
, &vlen
) == -1) {
154 DEBUG(5,("Could not test socket option %s.\n", p
->name
));
156 DEBUG(5,("socket option %s = %d\n",p
->name
,value
));
162 /****************************************************************************
163 Set user socket options.
164 ****************************************************************************/
166 void set_socket_options(int fd
, const char *options
)
170 while (next_token(&options
,tok
," \t,", sizeof(tok
))) {
174 BOOL got_value
= False
;
176 if ((p
= strchr_m(tok
,'='))) {
182 for (i
=0;socket_options
[i
].name
;i
++)
183 if (strequal(socket_options
[i
].name
,tok
))
186 if (!socket_options
[i
].name
) {
187 DEBUG(0,("Unknown socket option %s\n",tok
));
191 switch (socket_options
[i
].opttype
) {
194 ret
= setsockopt(fd
,socket_options
[i
].level
,
195 socket_options
[i
].option
,(char *)&value
,sizeof(int));
200 DEBUG(0,("syntax error - %s does not take a value\n",tok
));
203 int on
= socket_options
[i
].value
;
204 ret
= setsockopt(fd
,socket_options
[i
].level
,
205 socket_options
[i
].option
,(char *)&on
,sizeof(int));
211 DEBUG(0,("Failed to set socket option %s (Error %s)\n",tok
, strerror(errno
) ));
214 print_socket_options(fd
);
217 /****************************************************************************
219 ****************************************************************************/
221 ssize_t
read_udp_socket(int fd
,char *buf
,size_t len
)
224 struct sockaddr_in sock
;
225 socklen_t socklen
= sizeof(sock
);
227 memset((char *)&sock
,'\0',socklen
);
228 memset((char *)&lastip
,'\0',sizeof(lastip
));
229 ret
= (ssize_t
)sys_recvfrom(fd
,buf
,len
,0,(struct sockaddr
*)&sock
,&socklen
);
231 DEBUG(2,("read socket failed. ERRNO=%s\n",strerror(errno
)));
235 lastip
= sock
.sin_addr
;
236 lastport
= ntohs(sock
.sin_port
);
238 DEBUG(10,("read_udp_socket: lastip %s lastport %d read: %lu\n",
239 inet_ntoa(lastip
), lastport
, (unsigned long)ret
));
246 Socket routines from HEAD
- maybe re
-enable in future
. JRA
.
248 /****************************************************************************
249 Work out if we've timed out.
250 ****************************************************************************/
252 static BOOL
timeout_until(struct timeval
*timeout
, const struct timeval
*endtime
)
259 t_dif
= usec_time_diff(endtime
, &now
);
264 timeout
->tv_sec
= (t_dif
/ (SMB_BIG_INT
)1000000);
265 timeout
->tv_usec
= (t_dif
% (SMB_BIG_INT
)1000000);
269 /****************************************************************************
270 Read data from the client, reading exactly N bytes, or until endtime timeout.
271 Use with a non-blocking socket if endtime != NULL.
272 ****************************************************************************/
274 ssize_t
read_data_until(int fd
,char *buffer
,size_t N
, const struct timeval
*endtime
)
283 if (endtime
!= NULL
) {
285 struct timeval timeout
;
288 if (!timeout_until(&timeout
, endtime
)) {
289 DEBUG(10,("read_data_until: read timed out\n"));
290 smb_read_error
= READ_TIMEOUT
;
297 /* Select but ignore EINTR. */
298 selrtn
= sys_select_intr(fd
+1, &r_fds
, NULL
, NULL
, &timeout
);
300 /* something is wrong. Maybe the socket is dead? */
301 DEBUG(0,("read_data_until: select error = %s.\n", strerror(errno
) ));
302 smb_read_error
= READ_ERROR
;
306 /* Did we timeout ? */
308 DEBUG(10,("read_data_until: select timed out.\n"));
309 smb_read_error
= READ_TIMEOUT
;
314 ret
= sys_read(fd
,buffer
+ total
,N
- total
);
317 DEBUG(10,("read_data_until: read of %d returned 0. Error = %s\n", (int)(N
- total
), strerror(errno
) ));
318 smb_read_error
= READ_EOF
;
323 if (errno
== EAGAIN
) {
324 /* Non-blocking socket with no data available. Try select again. */
327 DEBUG(0,("read_data_until: read failure for %d. Error = %s\n", (int)(N
- total
), strerror(errno
) ));
328 smb_read_error
= READ_ERROR
;
333 return (ssize_t
)total
;
337 /****************************************************************************
338 Read data from a socket with a timout in msec.
339 mincount = if timeout, minimum to read before returning
340 maxcount = number to be read.
341 time_out = timeout in milliseconds
342 ****************************************************************************/
344 ssize_t
read_socket_with_timeout(int fd
,char *buf
,size_t mincnt
,size_t maxcnt
,unsigned int time_out
)
350 struct timeval timeout
;
352 /* just checking .... */
360 if (mincnt
== 0) mincnt
= maxcnt
;
362 while (nread
< mincnt
) {
363 readret
= sys_read(fd
, buf
+ nread
, maxcnt
- nread
);
366 DEBUG(5,("read_socket_with_timeout: blocking read. EOF from client.\n"));
367 smb_read_error
= READ_EOF
;
372 DEBUG(0,("read_socket_with_timeout: read error = %s.\n", strerror(errno
) ));
373 smb_read_error
= READ_ERROR
;
378 return((ssize_t
)nread
);
381 /* Most difficult - timeout read */
382 /* If this is ever called on a disk file and
383 mincnt is greater then the filesize then
384 system performance will suffer severely as
385 select always returns true on disk files */
387 /* Set initial timeout */
388 timeout
.tv_sec
= (time_t)(time_out
/ 1000);
389 timeout
.tv_usec
= (long)(1000 * (time_out
% 1000));
391 for (nread
=0; nread
< mincnt
; ) {
395 selrtn
= sys_select_intr(fd
+1,&fds
,NULL
,NULL
,&timeout
);
399 /* something is wrong. Maybe the socket is dead? */
400 DEBUG(0,("read_socket_with_timeout: timeout read. select error = %s.\n", strerror(errno
) ));
401 smb_read_error
= READ_ERROR
;
405 /* Did we timeout ? */
407 DEBUG(10,("read_socket_with_timeout: timeout read. select timed out.\n"));
408 smb_read_error
= READ_TIMEOUT
;
412 readret
= sys_read(fd
, buf
+nread
, maxcnt
-nread
);
415 /* we got EOF on the file descriptor */
416 DEBUG(5,("read_socket_with_timeout: timeout read. EOF from client.\n"));
417 smb_read_error
= READ_EOF
;
422 /* the descriptor is probably dead */
423 DEBUG(0,("read_socket_with_timeout: timeout read. read error = %s.\n", strerror(errno
) ));
424 smb_read_error
= READ_ERROR
;
431 /* Return the number we got */
432 return (ssize_t
)nread
;
435 /****************************************************************************
436 Read data from the client, reading exactly N bytes.
437 ****************************************************************************/
439 ssize_t
read_data(int fd
,char *buffer
,size_t N
)
447 ret
= sys_read(fd
,buffer
+ total
,N
- total
);
450 DEBUG(10,("read_data: read of %d returned 0. Error = %s\n", (int)(N
- total
), strerror(errno
) ));
451 smb_read_error
= READ_EOF
;
456 DEBUG(0,("read_data: read failure for %d. Error = %s\n", (int)(N
- total
), strerror(errno
) ));
457 smb_read_error
= READ_ERROR
;
462 return (ssize_t
)total
;
465 /****************************************************************************
466 Read data from a socket, reading exactly N bytes.
467 ****************************************************************************/
469 static ssize_t
read_socket_data(int fd
,char *buffer
,size_t N
)
477 ret
= sys_read(fd
,buffer
+ total
,N
- total
);
480 DEBUG(10,("read_socket_data: recv of %d returned 0. Error = %s\n", (int)(N
- total
), strerror(errno
) ));
481 smb_read_error
= READ_EOF
;
486 DEBUG(0,("read_socket_data: recv failure for %d. Error = %s\n", (int)(N
- total
), strerror(errno
) ));
487 smb_read_error
= READ_ERROR
;
492 return (ssize_t
)total
;
495 /****************************************************************************
497 ****************************************************************************/
499 ssize_t
write_data(int fd
, const char *buffer
, size_t N
)
505 ret
= sys_write(fd
,buffer
+ total
,N
- total
);
508 DEBUG(0,("write_data: write failure. Error = %s\n", strerror(errno
) ));
516 return (ssize_t
)total
;
519 /****************************************************************************
520 Write data to a socket - use send rather than write.
521 ****************************************************************************/
523 static ssize_t
write_socket_data(int fd
, const char *buffer
, size_t N
)
529 ret
= sys_send(fd
,buffer
+ total
,N
- total
,0);
532 DEBUG(0,("write_socket_data: write failure. Error = %s\n", strerror(errno
) ));
540 return (ssize_t
)total
;
543 /****************************************************************************
545 ****************************************************************************/
547 ssize_t
write_socket(int fd
, const char *buf
, size_t len
)
551 DEBUG(6,("write_socket(%d,%d)\n",fd
,(int)len
));
552 ret
= write_socket_data(fd
,buf
,len
);
554 DEBUG(6,("write_socket(%d,%d) wrote %d\n",fd
,(int)len
,(int)ret
));
556 DEBUG(0,("write_socket: Error writing %d bytes to socket %d: ERRNO = %s\n",
557 (int)len
, fd
, strerror(errno
) ));
562 /****************************************************************************
563 Send a keepalive packet (rfc1002).
564 ****************************************************************************/
566 BOOL
send_keepalive(int client
)
568 unsigned char buf
[4];
570 buf
[0] = SMBkeepalive
;
571 buf
[1] = buf
[2] = buf
[3] = 0;
573 return(write_socket_data(client
,(char *)buf
,4) == 4);
577 /****************************************************************************
578 Read 4 bytes of a smb packet and return the smb length of the packet.
579 Store the result in the buffer.
580 This version of the function will return a length of zero on receiving
582 Timeout is in milliseconds.
583 ****************************************************************************/
585 static ssize_t
read_smb_length_return_keepalive(int fd
, char *inbuf
, unsigned int timeout
)
593 ok
= (read_socket_with_timeout(fd
,inbuf
,4,4,timeout
) == 4);
595 ok
= (read_socket_data(fd
,inbuf
,4) == 4);
600 len
= smb_len(inbuf
);
601 msg_type
= CVAL(inbuf
,0);
603 if (msg_type
== SMBkeepalive
)
604 DEBUG(5,("Got keepalive packet\n"));
607 DEBUG(10,("got smb length of %lu\n",(unsigned long)len
));
612 /****************************************************************************
613 Read 4 bytes of a smb packet and return the smb length of the packet.
614 Store the result in the buffer. This version of the function will
615 never return a session keepalive (length of zero).
616 Timeout is in milliseconds.
617 ****************************************************************************/
619 ssize_t
read_smb_length(int fd
, char *inbuf
, unsigned int timeout
)
624 len
= read_smb_length_return_keepalive(fd
, inbuf
, timeout
);
629 /* Ignore session keepalives. */
630 if(CVAL(inbuf
,0) != SMBkeepalive
)
634 DEBUG(10,("read_smb_length: got smb length of %lu\n",
635 (unsigned long)len
));
640 /****************************************************************************
641 Read an smb from a fd. Note that the buffer *MUST* be of size
642 BUFFER_SIZE+SAFETY_MARGIN.
643 The timeout is in milliseconds.
644 This function will return on receipt of a session keepalive packet.
645 Doesn't check the MAC on signed packets.
646 ****************************************************************************/
648 BOOL
receive_smb_raw(int fd
, char *buffer
, unsigned int timeout
)
654 memset(buffer
,'\0',smb_size
+ 100);
656 len
= read_smb_length_return_keepalive(fd
,buffer
,timeout
);
658 DEBUG(10,("receive_smb_raw: length < 0!\n"));
661 * Correct fix. smb_read_error may have already been
662 * set. Only set it here if not already set. Global
663 * variables still suck :-). JRA.
666 if (smb_read_error
== 0)
667 smb_read_error
= READ_ERROR
;
672 * A WRITEX with CAP_LARGE_WRITEX can be 64k worth of data plus 65 bytes
673 * of header. Don't print the error if this fits.... JRA.
676 if (len
> (BUFFER_SIZE
+ LARGE_WRITEX_HDR_SIZE
)) {
677 DEBUG(0,("Invalid packet length! (%lu bytes).\n",(unsigned long)len
));
678 if (len
> BUFFER_SIZE
+ (SAFETY_MARGIN
/2)) {
681 * Correct fix. smb_read_error may have already been
682 * set. Only set it here if not already set. Global
683 * variables still suck :-). JRA.
686 if (smb_read_error
== 0)
687 smb_read_error
= READ_ERROR
;
694 ret
= read_socket_with_timeout(fd
,buffer
+4,len
,len
,timeout
);
696 ret
= read_socket_data(fd
,buffer
+4,len
);
700 if (smb_read_error
== 0)
701 smb_read_error
= READ_ERROR
;
705 /* not all of samba3 properly checks for packet-termination of strings. This
706 ensures that we don't run off into empty space. */
707 SSVAL(buffer
+4,len
, 0);
713 /****************************************************************************
714 Wrapper for receive_smb_raw().
715 Checks the MAC on signed packets.
716 ****************************************************************************/
718 BOOL
receive_smb(int fd
, char *buffer
, unsigned int timeout
)
720 if (!receive_smb_raw(fd
, buffer
, timeout
)) {
724 /* Check the incoming SMB signature. */
725 if (!srv_check_sign_mac(buffer
, True
)) {
726 DEBUG(0, ("receive_smb: SMB Signature verification failed on incoming packet!\n"));
727 if (smb_read_error
== 0)
728 smb_read_error
= READ_BAD_SIG
;
735 /****************************************************************************
737 ****************************************************************************/
739 BOOL
send_smb(int fd
, char *buffer
)
745 /* Sign the outgoing packet if required. */
746 srv_calculate_sign_mac(buffer
);
748 len
= smb_len(buffer
) + 4;
750 while (nwritten
< len
) {
751 ret
= write_socket(fd
,buffer
+nwritten
,len
- nwritten
);
753 DEBUG(0,("Error writing %d bytes to client. %d. (%s)\n",
754 (int)len
,(int)ret
, strerror(errno
) ));
763 /****************************************************************************
764 Open a socket of the specified type, port, and address for incoming data.
765 ****************************************************************************/
767 int open_socket_in( int type
, int port
, int dlevel
, uint32 socket_addr
, BOOL rebind
)
769 struct sockaddr_in sock
;
772 memset( (char *)&sock
, '\0', sizeof(sock
) );
774 #ifdef HAVE_SOCK_SIN_LEN
775 sock
.sin_len
= sizeof(sock
);
777 sock
.sin_port
= htons( port
);
778 sock
.sin_family
= AF_INET
;
779 sock
.sin_addr
.s_addr
= socket_addr
;
781 res
= socket( AF_INET
, type
, 0 );
784 dbgtext( "open_socket_in(): socket() call failed: " );
785 dbgtext( "%s\n", strerror( errno
) );
790 /* This block sets/clears the SO_REUSEADDR and possibly SO_REUSEPORT. */
792 int val
= rebind
? 1 : 0;
793 if( setsockopt(res
,SOL_SOCKET
,SO_REUSEADDR
,(char *)&val
,sizeof(val
)) == -1 ) {
794 if( DEBUGLVL( dlevel
) ) {
795 dbgtext( "open_socket_in(): setsockopt: " );
796 dbgtext( "SO_REUSEADDR = %s ", val
?"True":"False" );
797 dbgtext( "on port %d failed ", port
);
798 dbgtext( "with error = %s\n", strerror(errno
) );
802 if( setsockopt(res
,SOL_SOCKET
,SO_REUSEPORT
,(char *)&val
,sizeof(val
)) == -1 ) {
803 if( DEBUGLVL( dlevel
) ) {
804 dbgtext( "open_socket_in(): setsockopt: ");
805 dbgtext( "SO_REUSEPORT = %s ", val
?"True":"False" );
806 dbgtext( "on port %d failed ", port
);
807 dbgtext( "with error = %s\n", strerror(errno
) );
810 #endif /* SO_REUSEPORT */
813 /* now we've got a socket - we need to bind it */
814 if( bind( res
, (struct sockaddr
*)&sock
, sizeof(sock
) ) == -1 ) {
815 if( DEBUGLVL(dlevel
) && (port
== SMB_PORT1
|| port
== SMB_PORT2
|| port
== NMB_PORT
) ) {
816 dbgtext( "bind failed on port %d ", port
);
817 dbgtext( "socket_addr = %s.\n", inet_ntoa( sock
.sin_addr
) );
818 dbgtext( "Error = %s\n", strerror(errno
) );
824 DEBUG( 10, ( "bind succeeded on port %d\n", port
) );
829 /****************************************************************************
830 Create an outgoing socket. timeout is in milliseconds.
831 **************************************************************************/
833 int open_socket_out(int type
, struct in_addr
*addr
, int port
,int timeout
)
835 struct sockaddr_in sock_out
;
837 int connect_loop
= 10;
840 /* create a socket to write to */
841 res
= socket(PF_INET
, type
, 0);
843 DEBUG(0,("socket error (%s)\n", strerror(errno
)));
847 if (type
!= SOCK_STREAM
)
850 memset((char *)&sock_out
,'\0',sizeof(sock_out
));
851 putip((char *)&sock_out
.sin_addr
,(char *)addr
);
853 sock_out
.sin_port
= htons( port
);
854 sock_out
.sin_family
= PF_INET
;
856 /* set it non-blocking */
857 set_blocking(res
,False
);
859 DEBUG(3,("Connecting to %s at port %d\n",inet_ntoa(*addr
),port
));
861 /* and connect it to the destination */
864 ret
= connect(res
,(struct sockaddr
*)&sock_out
,sizeof(sock_out
));
866 /* Some systems return EAGAIN when they mean EINPROGRESS */
867 if (ret
< 0 && (errno
== EINPROGRESS
|| errno
== EALREADY
||
868 errno
== EAGAIN
) && (connect_loop
< timeout
) ) {
869 smb_msleep(connect_loop
);
870 timeout
-= connect_loop
;
871 connect_loop
+= increment
;
872 if (increment
< 250) {
873 /* After 8 rounds we end up at a max of 255 msec */
879 if (ret
< 0 && (errno
== EINPROGRESS
|| errno
== EALREADY
||
881 DEBUG(1,("timeout connecting to %s:%d\n",inet_ntoa(*addr
),port
));
888 if (ret
< 0 && errno
== EISCONN
) {
895 DEBUG(2,("error connecting to %s:%d (%s)\n",
896 inet_ntoa(*addr
),port
,strerror(errno
)));
901 /* set it blocking again */
902 set_blocking(res
,True
);
907 /****************************************************************************
908 Create an outgoing TCP socket to any of the addrs. This is for
909 simultaneous connects to port 445 and 139 of a host or even a variety
910 of DC's all of which are equivalent for our purposes.
911 **************************************************************************/
913 BOOL
open_any_socket_out(struct sockaddr_in
*addrs
, int num_addrs
,
914 int timeout
, int *fd_index
, int *fd
)
916 int i
, resulting_index
, res
;
920 fd_set r_fds
, wr_fds
;
924 int connect_loop
= 10000; /* 10 milliseconds */
926 timeout
*= 1000; /* convert to microseconds */
928 sockets
= SMB_MALLOC_ARRAY(int, num_addrs
);
933 resulting_index
= -1;
935 for (i
=0; i
<num_addrs
; i
++)
938 for (i
=0; i
<num_addrs
; i
++) {
939 sockets
[i
] = socket(PF_INET
, SOCK_STREAM
, 0);
942 set_blocking(sockets
[i
], False
);
946 good_connect
= False
;
948 for (i
=0; i
<num_addrs
; i
++) {
950 if (sockets
[i
] == -1)
953 if (connect(sockets
[i
], (struct sockaddr
*)&(addrs
[i
]),
954 sizeof(*addrs
)) == 0) {
955 /* Rather unlikely as we are non-blocking, but it
956 * might actually happen. */
961 if (errno
== EINPROGRESS
|| errno
== EALREADY
||
963 /* These are the error messages that something is
966 } else if (errno
!= 0) {
967 /* There was a direct error */
974 /* All of the connect's resulted in real error conditions */
978 /* Lets see if any of the connect attempts succeeded */
984 for (i
=0; i
<num_addrs
; i
++) {
985 if (sockets
[i
] == -1)
987 FD_SET(sockets
[i
], &wr_fds
);
988 FD_SET(sockets
[i
], &r_fds
);
989 if (sockets
[i
]>maxfd
)
994 tv
.tv_usec
= connect_loop
;
996 res
= sys_select(maxfd
+1, &r_fds
, &wr_fds
, NULL
, &tv
);
1004 for (i
=0; i
<num_addrs
; i
++) {
1006 if (sockets
[i
] == -1)
1009 /* Stevens, Network Programming says that if there's a
1010 * successful connect, the socket is only writable. Upon an
1011 * error, it's both readable and writable. */
1013 if (FD_ISSET(sockets
[i
], &r_fds
) &&
1014 FD_ISSET(sockets
[i
], &wr_fds
)) {
1015 /* readable and writable, so it's an error */
1021 if (!FD_ISSET(sockets
[i
], &r_fds
) &&
1022 FD_ISSET(sockets
[i
], &wr_fds
)) {
1023 /* Only writable, so it's connected */
1024 resulting_index
= i
;
1031 timeout
-= connect_loop
;
1034 connect_loop
*= 1.5;
1035 if (connect_loop
> timeout
)
1036 connect_loop
= timeout
;
1040 for (i
=0; i
<num_addrs
; i
++) {
1041 if (i
== resulting_index
)
1043 if (sockets
[i
] >= 0)
1047 if (resulting_index
>= 0) {
1048 *fd_index
= resulting_index
;
1049 *fd
= sockets
[*fd_index
];
1050 set_blocking(*fd
, True
);
1055 return (resulting_index
>= 0);
1057 /****************************************************************************
1058 Open a connected UDP socket to host on port
1059 **************************************************************************/
1061 int open_udp_socket(const char *host
, int port
)
1063 int type
= SOCK_DGRAM
;
1064 struct sockaddr_in sock_out
;
1066 struct in_addr
*addr
;
1068 addr
= interpret_addr2(host
);
1070 res
= socket(PF_INET
, type
, 0);
1075 memset((char *)&sock_out
,'\0',sizeof(sock_out
));
1076 putip((char *)&sock_out
.sin_addr
,(char *)addr
);
1077 sock_out
.sin_port
= htons(port
);
1078 sock_out
.sin_family
= PF_INET
;
1080 if (connect(res
,(struct sockaddr
*)&sock_out
,sizeof(sock_out
))) {
1089 /* the following 3 client_*() functions are nasty ways of allowing
1090 some generic functions to get info that really should be hidden in
1091 particular modules */
1092 static int client_fd
= -1;
1094 void client_setfd(int fd
)
1099 char *client_name(void)
1101 return get_peer_name(client_fd
,False
);
1104 char *client_addr(void)
1106 return get_peer_addr(client_fd
);
1109 char *client_socket_addr(void)
1111 return get_socket_addr(client_fd
);
1114 int client_socket_port(void)
1116 return get_socket_port(client_fd
);
1119 struct in_addr
*client_inaddr(struct sockaddr
*sa
)
1121 struct sockaddr_in
*sockin
= (struct sockaddr_in
*) (sa
);
1122 socklen_t length
= sizeof(*sa
);
1124 if (getpeername(client_fd
, sa
, &length
) < 0) {
1125 DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno
) ));
1129 return &sockin
->sin_addr
;
1132 /*******************************************************************
1133 Matchname - determine if host name matches IP address. Used to
1134 confirm a hostname lookup to prevent spoof attacks.
1135 ******************************************************************/
1137 static BOOL
matchname(char *remotehost
,struct in_addr addr
)
1142 if ((hp
= sys_gethostbyname(remotehost
)) == 0) {
1143 DEBUG(0,("sys_gethostbyname(%s): lookup failure.\n", remotehost
));
1148 * Make sure that gethostbyname() returns the "correct" host name.
1149 * Unfortunately, gethostbyname("localhost") sometimes yields
1150 * "localhost.domain". Since the latter host name comes from the
1151 * local DNS, we just have to trust it (all bets are off if the local
1152 * DNS is perverted). We always check the address list, though.
1155 if (!strequal(remotehost
, hp
->h_name
)
1156 && !strequal(remotehost
, "localhost")) {
1157 DEBUG(0,("host name/name mismatch: %s != %s\n",
1158 remotehost
, hp
->h_name
));
1162 /* Look up the host address in the address list we just got. */
1163 for (i
= 0; hp
->h_addr_list
[i
]; i
++) {
1164 if (memcmp(hp
->h_addr_list
[i
], (char *) & addr
, sizeof(addr
)) == 0)
1169 * The host name does not map to the original host address. Perhaps
1170 * someone has compromised a name server. More likely someone botched
1171 * it, but that could be dangerous, too.
1174 DEBUG(0,("host name/address mismatch: %s != %s\n",
1175 inet_ntoa(addr
), hp
->h_name
));
1179 /*******************************************************************
1180 Return the DNS name of the remote end of a socket.
1181 ******************************************************************/
1183 char *get_peer_name(int fd
, BOOL force_lookup
)
1185 static pstring name_buf
;
1187 static fstring addr_buf
;
1189 struct in_addr addr
;
1192 /* reverse lookups can be *very* expensive, and in many
1193 situations won't work because many networks don't link dhcp
1194 with dns. To avoid the delay we avoid the lookup if
1196 if (!lp_hostname_lookups() && (force_lookup
== False
)) {
1197 return get_peer_addr(fd
);
1200 p
= get_peer_addr(fd
);
1202 /* it might be the same as the last one - save some DNS work */
1203 if (strcmp(p
, addr_buf
) == 0)
1206 pstrcpy(name_buf
,"UNKNOWN");
1210 fstrcpy(addr_buf
, p
);
1212 addr
= *interpret_addr2(p
);
1214 /* Look up the remote host name. */
1215 if ((hp
= gethostbyaddr((char *)&addr
.s_addr
, sizeof(addr
.s_addr
), AF_INET
)) == 0) {
1216 DEBUG(1,("Gethostbyaddr failed for %s\n",p
));
1217 pstrcpy(name_buf
, p
);
1219 pstrcpy(name_buf
,(char *)hp
->h_name
);
1220 if (!matchname(name_buf
, addr
)) {
1221 DEBUG(0,("Matchname failed on %s %s\n",name_buf
,p
));
1222 pstrcpy(name_buf
,"UNKNOWN");
1226 /* can't pass the same source and dest strings in when you
1227 use --enable-developer or the clobber_region() call will
1230 pstrcpy( tmp_name
, name_buf
);
1231 alpha_strcpy(name_buf
, tmp_name
, "_-.", sizeof(name_buf
));
1232 if (strstr(name_buf
,"..")) {
1233 pstrcpy(name_buf
, "UNKNOWN");
1239 /*******************************************************************
1240 Return the IP addr of the remote end of a socket as a string.
1241 ******************************************************************/
1243 char *get_peer_addr(int fd
)
1246 struct sockaddr_in
*sockin
= (struct sockaddr_in
*) (&sa
);
1247 socklen_t length
= sizeof(sa
);
1248 static fstring addr_buf
;
1250 fstrcpy(addr_buf
,"0.0.0.0");
1256 if (getpeername(fd
, &sa
, &length
) < 0) {
1257 DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno
) ));
1261 fstrcpy(addr_buf
,(char *)inet_ntoa(sockin
->sin_addr
));
1266 /*******************************************************************
1267 Create protected unix domain socket.
1269 Some unixes cannot set permissions on a ux-dom-sock, so we
1270 have to make sure that the directory contains the protection
1271 permissions instead.
1272 ******************************************************************/
1274 int create_pipe_sock(const char *socket_dir
,
1275 const char *socket_name
,
1278 #ifdef HAVE_UNIXSOCKET
1279 struct sockaddr_un sunaddr
;
1285 old_umask
= umask(0);
1287 /* Create the socket directory or reuse the existing one */
1289 if (lstat(socket_dir
, &st
) == -1) {
1290 if (errno
== ENOENT
) {
1291 /* Create directory */
1292 if (mkdir(socket_dir
, dir_perms
) == -1) {
1293 DEBUG(0, ("error creating socket directory "
1294 "%s: %s\n", socket_dir
,
1299 DEBUG(0, ("lstat failed on socket directory %s: %s\n",
1300 socket_dir
, strerror(errno
)));
1304 /* Check ownership and permission on existing directory */
1305 if (!S_ISDIR(st
.st_mode
)) {
1306 DEBUG(0, ("socket directory %s isn't a directory\n",
1310 if ((st
.st_uid
!= sec_initial_uid()) ||
1311 ((st
.st_mode
& 0777) != dir_perms
)) {
1312 DEBUG(0, ("invalid permissions on socket directory "
1313 "%s\n", socket_dir
));
1318 /* Create the socket file */
1320 sock
= socket(AF_UNIX
, SOCK_STREAM
, 0);
1327 pstr_sprintf(path
, "%s/%s", socket_dir
, socket_name
);
1330 memset(&sunaddr
, 0, sizeof(sunaddr
));
1331 sunaddr
.sun_family
= AF_UNIX
;
1332 safe_strcpy(sunaddr
.sun_path
, path
, sizeof(sunaddr
.sun_path
)-1);
1334 if (bind(sock
, (struct sockaddr
*)&sunaddr
, sizeof(sunaddr
)) == -1) {
1335 DEBUG(0, ("bind failed on pipe socket %s: %s\n", path
,
1340 if (listen(sock
, 5) == -1) {
1341 DEBUG(0, ("listen failed on pipe socket %s: %s\n", path
,
1357 DEBUG(0, ("create_pipe_sock: No Unix sockets on this system\n"));
1359 #endif /* HAVE_UNIXSOCKET */