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},
101 #ifdef IPTOS_LOWDELAY
102 {"IPTOS_LOWDELAY", IPPROTO_IP, IP_TOS, IPTOS_LOWDELAY, OPT_ON},
104 #ifdef IPTOS_THROUGHPUT
105 {"IPTOS_THROUGHPUT", IPPROTO_IP, IP_TOS, IPTOS_THROUGHPUT, OPT_ON},
108 {"SO_REUSEPORT", SOL_SOCKET, SO_REUSEPORT, 0, OPT_BOOL},
111 {"SO_SNDBUF", SOL_SOCKET, SO_SNDBUF, 0, OPT_INT},
114 {"SO_RCVBUF", SOL_SOCKET, SO_RCVBUF, 0, OPT_INT},
117 {"SO_SNDLOWAT", SOL_SOCKET, SO_SNDLOWAT, 0, OPT_INT},
120 {"SO_RCVLOWAT", SOL_SOCKET, SO_RCVLOWAT, 0, OPT_INT},
123 {"SO_SNDTIMEO", SOL_SOCKET, SO_SNDTIMEO, 0, OPT_INT},
126 {"SO_RCVTIMEO", SOL_SOCKET, SO_RCVTIMEO, 0, OPT_INT},
130 /****************************************************************************
131 Print socket options.
132 ****************************************************************************/
134 static void print_socket_options(int s)
138 const smb_socket_option *p = &socket_options[0];
140 /* wrapped in if statement to prevent streams leak in SCO Openserver 5.0 */
141 /* reported on samba-technical --jerry */
142 if ( DEBUGLEVEL >= 5 ) {
143 for (; p->name != NULL; p++) {
144 if (getsockopt(s, p->level, p->option, (void *)&value, &vlen) == -1) {
145 DEBUG(5,("Could not test socket option %s.\n", p->name));
147 DEBUG(5,("socket option %s = %d\n",p->name,value));
153 /****************************************************************************
154 Set user socket options.
155 ****************************************************************************/
157 void set_socket_options(int fd, const char *options)
161 while (next_token(&options,tok," \t,", sizeof(tok))) {
165 BOOL got_value = False;
167 if ((p = strchr_m(tok,'='))) {
173 for (i=0;socket_options[i].name;i++)
174 if (strequal(socket_options[i].name,tok))
177 if (!socket_options[i].name) {
178 DEBUG(0,("Unknown socket option %s\n",tok));
182 switch (socket_options[i].opttype) {
185 ret = setsockopt(fd,socket_options[i].level,
186 socket_options[i].option,(char *)&value,sizeof(int));
191 DEBUG(0,("syntax error - %s does not take a value\n",tok));
194 int on = socket_options[i].value;
195 ret = setsockopt(fd,socket_options[i].level,
196 socket_options[i].option,(char *)&on,sizeof(int));
202 DEBUG(0,("Failed to set socket option %s (Error %s)\n",tok, strerror(errno) ));
205 print_socket_options(fd);
208 /****************************************************************************
210 ****************************************************************************/
212 ssize_t read_udp_socket(int fd,char *buf,size_t len)
215 struct sockaddr_in sock;
216 socklen_t socklen = sizeof(sock);
218 memset((char *)&sock,'\0',socklen);
219 memset((char *)&lastip,'\0',sizeof(lastip));
220 ret = (ssize_t)sys_recvfrom(fd,buf,len,0,(struct sockaddr *)&sock,&socklen);
222 DEBUG(2,("read socket failed. ERRNO=%s\n",strerror(errno)));
226 lastip = sock.sin_addr;
227 lastport = ntohs(sock.sin_port);
229 DEBUG(10,("read_udp_socket: lastip %s lastport %d read: %lu\n",
230 inet_ntoa(lastip), lastport, (unsigned long)ret));
235 /****************************************************************************
236 Read data from a socket with a timout in msec.
237 mincount = if timeout, minimum to read before returning
238 maxcount = number to be read.
239 time_out = timeout in milliseconds
240 ****************************************************************************/
242 ssize_t read_socket_with_timeout(int fd,char *buf,size_t mincnt,size_t maxcnt,unsigned int time_out)
248 struct timeval timeout;
250 /* just checking .... */
258 if (mincnt == 0) mincnt = maxcnt;
260 while (nread < mincnt) {
261 readret = sys_read(fd, buf + nread, maxcnt - nread);
264 DEBUG(5,("read_socket_with_timeout: blocking read. EOF from client.\n"));
265 smb_read_error = READ_EOF;
270 DEBUG(0,("read_socket_with_timeout: read error = %s.\n", strerror(errno) ));
271 smb_read_error = READ_ERROR;
276 return((ssize_t)nread);
279 /* Most difficult - timeout read */
280 /* If this is ever called on a disk file and
281 mincnt is greater then the filesize then
282 system performance will suffer severely as
283 select always returns true on disk files */
285 /* Set initial timeout */
286 timeout.tv_sec = (time_t)(time_out / 1000);
287 timeout.tv_usec = (long)(1000 * (time_out % 1000));
289 for (nread=0; nread < mincnt; ) {
293 selrtn = sys_select_intr(fd+1,&fds,NULL,NULL,&timeout);
297 /* something is wrong. Maybe the socket is dead? */
298 DEBUG(0,("read_socket_with_timeout: timeout read. select error = %s.\n", strerror(errno) ));
299 smb_read_error = READ_ERROR;
303 /* Did we timeout ? */
305 DEBUG(10,("read_socket_with_timeout: timeout read. select timed out.\n"));
306 smb_read_error = READ_TIMEOUT;
310 readret = sys_read(fd, buf+nread, maxcnt-nread);
313 /* we got EOF on the file descriptor */
314 DEBUG(5,("read_socket_with_timeout: timeout read. EOF from client.\n"));
315 smb_read_error = READ_EOF;
320 /* the descriptor is probably dead */
321 DEBUG(0,("read_socket_with_timeout: timeout read. read error = %s.\n", strerror(errno) ));
322 smb_read_error = READ_ERROR;
329 /* Return the number we got */
330 return (ssize_t)nread;
333 /****************************************************************************
334 Read data from the client, reading exactly N bytes.
335 ****************************************************************************/
337 ssize_t read_data(int fd,char *buffer,size_t N)
345 ret = sys_read(fd,buffer + total,N - total);
348 DEBUG(10,("read_data: read of %d returned 0. Error = %s\n", (int)(N - total), strerror(errno) ));
349 smb_read_error = READ_EOF;
354 DEBUG(0,("read_data: read failure for %d. Error = %s\n", (int)(N - total), strerror(errno) ));
355 smb_read_error = READ_ERROR;
360 return (ssize_t)total;
363 /****************************************************************************
364 Read data from a socket, reading exactly N bytes.
365 ****************************************************************************/
367 static ssize_t read_socket_data(int fd,char *buffer,size_t N)
375 ret = sys_read(fd,buffer + total,N - total);
378 DEBUG(10,("read_socket_data: recv of %d returned 0. Error = %s\n", (int)(N - total), strerror(errno) ));
379 smb_read_error = READ_EOF;
384 DEBUG(0,("read_socket_data: recv failure for %d. Error = %s\n", (int)(N - total), strerror(errno) ));
385 smb_read_error = READ_ERROR;
390 return (ssize_t)total;
393 /****************************************************************************
395 ****************************************************************************/
397 ssize_t write_data(int fd,char *buffer,size_t N)
403 ret = sys_write(fd,buffer + total,N - total);
406 DEBUG(0,("write_data: write failure. Error = %s\n", strerror(errno) ));
414 return (ssize_t)total;
417 /****************************************************************************
418 Write data to a socket - use send rather than write.
419 ****************************************************************************/
421 static ssize_t write_socket_data(int fd,char *buffer,size_t N)
427 ret = sys_send(fd,buffer + total,N - total,0);
430 DEBUG(0,("write_socket_data: write failure. Error = %s\n", strerror(errno) ));
438 return (ssize_t)total;
441 /****************************************************************************
443 ****************************************************************************/
445 ssize_t write_socket(int fd,char *buf,size_t len)
449 DEBUG(6,("write_socket(%d,%d)\n",fd,(int)len));
450 ret = write_socket_data(fd,buf,len);
452 DEBUG(6,("write_socket(%d,%d) wrote %d\n",fd,(int)len,(int)ret));
454 DEBUG(0,("write_socket: Error writing %d bytes to socket %d: ERRNO = %s\n",
455 (int)len, fd, strerror(errno) ));
460 /****************************************************************************
461 Send a keepalive packet (rfc1002).
462 ****************************************************************************/
464 BOOL send_keepalive(int client)
466 unsigned char buf[4];
468 buf[0] = SMBkeepalive;
469 buf[1] = buf[2] = buf[3] = 0;
471 return(write_socket_data(client,(char *)buf,4) == 4);
475 /****************************************************************************
476 Read 4 bytes of a smb packet and return the smb length of the packet.
477 Store the result in the buffer.
478 This version of the function will return a length of zero on receiving
480 Timeout is in milliseconds.
481 ****************************************************************************/
483 static ssize_t read_smb_length_return_keepalive(int fd,char *inbuf,unsigned int timeout)
491 ok = (read_socket_with_timeout(fd,inbuf,4,4,timeout) == 4);
493 ok = (read_socket_data(fd,inbuf,4) == 4);
498 len = smb_len(inbuf);
499 msg_type = CVAL(inbuf,0);
501 if (msg_type == SMBkeepalive)
502 DEBUG(5,("Got keepalive packet\n"));
505 DEBUG(10,("got smb length of %lu\n",(unsigned long)len));
510 /****************************************************************************
511 Read 4 bytes of a smb packet and return the smb length of the packet.
512 Store the result in the buffer. This version of the function will
513 never return a session keepalive (length of zero).
514 Timeout is in milliseconds.
515 ****************************************************************************/
517 ssize_t read_smb_length(int fd,char *inbuf,unsigned int timeout)
522 len = read_smb_length_return_keepalive(fd, inbuf, timeout);
527 /* Ignore session keepalives. */
528 if(CVAL(inbuf,0) != SMBkeepalive)
532 DEBUG(10,("read_smb_length: got smb length of %lu\n",
533 (unsigned long)len));
538 /****************************************************************************
539 Read an smb from a fd. Note that the buffer *MUST* be of size
540 BUFFER_SIZE+SAFETY_MARGIN.
541 The timeout is in milliseconds.
542 This function will return on receipt of a session keepalive packet.
543 Doesn't check the MAC on signed packets.
544 ****************************************************************************/
546 BOOL receive_smb_raw(int fd,char *buffer, unsigned int timeout)
552 memset(buffer,'\0',smb_size + 100);
554 len = read_smb_length_return_keepalive(fd,buffer,timeout);
556 DEBUG(10,("receive_smb_raw: length < 0!\n"));
559 * Correct fix. smb_read_error may have already been
560 * set. Only set it here if not already set. Global
561 * variables still suck :-). JRA.
564 if (smb_read_error == 0)
565 smb_read_error = READ_ERROR;
570 * A WRITEX with CAP_LARGE_WRITEX can be 64k worth of data plus 65 bytes
571 * of header. Don't print the error if this fits.... JRA.
574 if (len > (BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE)) {
575 DEBUG(0,("Invalid packet length! (%lu bytes).\n",(unsigned long)len));
576 if (len > BUFFER_SIZE + (SAFETY_MARGIN/2)) {
579 * Correct fix. smb_read_error may have already been
580 * set. Only set it here if not already set. Global
581 * variables still suck :-). JRA.
584 if (smb_read_error == 0)
585 smb_read_error = READ_ERROR;
591 ret = read_socket_data(fd,buffer+4,len);
593 if (smb_read_error == 0)
594 smb_read_error = READ_ERROR;
598 /* not all of samba3 properly checks for packet-termination of strings. This
599 ensures that we don't run off into empty space. */
600 SSVAL(buffer+4,len, 0);
606 /****************************************************************************
607 Wrapper for receive_smb_raw().
608 Checks the MAC on signed packets.
609 ****************************************************************************/
611 BOOL receive_smb(int fd,char *buffer, unsigned int timeout)
613 if (!receive_smb_raw(fd, buffer, timeout)) {
617 /* Check the incoming SMB signature. */
618 if (!srv_check_sign_mac(buffer, True)) {
619 DEBUG(0, ("receive_smb: SMB Signature verification failed on incoming packet!\n"));
620 if (smb_read_error == 0)
621 smb_read_error = READ_BAD_SIG;
628 /****************************************************************************
630 ****************************************************************************/
632 BOOL send_smb(int fd,char *buffer)
638 /* Sign the outgoing packet if required. */
639 srv_calculate_sign_mac(buffer);
641 len = smb_len(buffer) + 4;
643 while (nwritten < len) {
644 ret = write_socket(fd,buffer+nwritten,len - nwritten);
646 DEBUG(0,("Error writing %d bytes to client. %d. (%s)\n",
647 (int)len,(int)ret, strerror(errno) ));
656 /****************************************************************************
657 Open a socket of the specified type, port, and address for incoming data.
658 ****************************************************************************/
660 int open_socket_in( int type, int port, int dlevel, uint32 socket_addr, BOOL rebind )
662 struct sockaddr_in sock;
665 memset( (char *)&sock, '\0', sizeof(sock) );
667 #ifdef HAVE_SOCK_SIN_LEN
668 sock.sin_len = sizeof(sock);
670 sock.sin_port = htons( port );
671 sock.sin_family = AF_INET;
672 sock.sin_addr.s_addr = socket_addr;
674 res = socket( AF_INET, type, 0 );
677 dbgtext( "open_socket_in(): socket() call failed: " );
678 dbgtext( "%s\n", strerror( errno ) );
683 /* This block sets/clears the SO_REUSEADDR and possibly SO_REUSEPORT. */
685 int val = rebind ? 1 : 0;
686 if( setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)) == -1 ) {
687 if( DEBUGLVL( dlevel ) ) {
688 dbgtext( "open_socket_in(): setsockopt: " );
689 dbgtext( "SO_REUSEADDR = %s ", val?"True":"False" );
690 dbgtext( "on port %d failed ", port );
691 dbgtext( "with error = %s\n", strerror(errno) );
695 if( setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val)) == -1 ) {
696 if( DEBUGLVL( dlevel ) ) {
697 dbgtext( "open_socket_in(): setsockopt: ");
698 dbgtext( "SO_REUSEPORT = %s ", val?"True":"False" );
699 dbgtext( "on port %d failed ", port );
700 dbgtext( "with error = %s\n", strerror(errno) );
703 #endif /* SO_REUSEPORT */
706 /* now we've got a socket - we need to bind it */
707 if( bind( res, (struct sockaddr *)&sock, sizeof(sock) ) == -1 ) {
708 if( DEBUGLVL(dlevel) && (port == SMB_PORT1 || port == SMB_PORT2 || port == NMB_PORT) ) {
709 dbgtext( "bind failed on port %d ", port );
710 dbgtext( "socket_addr = %s.\n", inet_ntoa( sock.sin_addr ) );
711 dbgtext( "Error = %s\n", strerror(errno) );
717 DEBUG( 10, ( "bind succeeded on port %d\n", port ) );
722 /****************************************************************************
723 Create an outgoing socket. timeout is in milliseconds.
724 **************************************************************************/
726 int open_socket_out(int type, struct in_addr *addr, int port ,int timeout)
728 struct sockaddr_in sock_out;
730 int connect_loop = 10;
733 /* create a socket to write to */
734 res = socket(PF_INET, type, 0);
736 DEBUG(0,("socket error (%s)\n", strerror(errno)));
740 if (type != SOCK_STREAM)
743 memset((char *)&sock_out,'\0',sizeof(sock_out));
744 putip((char *)&sock_out.sin_addr,(char *)addr);
746 sock_out.sin_port = htons( port );
747 sock_out.sin_family = PF_INET;
749 /* set it non-blocking */
750 set_blocking(res,False);
752 DEBUG(3,("Connecting to %s at port %d\n",inet_ntoa(*addr),port));
754 /* and connect it to the destination */
757 ret = connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out));
759 /* Some systems return EAGAIN when they mean EINPROGRESS */
760 if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY ||
761 errno == EAGAIN) && (connect_loop < timeout) ) {
762 smb_msleep(connect_loop);
763 timeout -= connect_loop;
764 connect_loop += increment;
765 if (increment < 250) {
766 /* After 8 rounds we end up at a max of 255 msec */
772 if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY ||
774 DEBUG(1,("timeout connecting to %s:%d\n",inet_ntoa(*addr),port));
781 if (ret < 0 && errno == EISCONN) {
788 DEBUG(2,("error connecting to %s:%d (%s)\n",
789 inet_ntoa(*addr),port,strerror(errno)));
794 /* set it blocking again */
795 set_blocking(res,True);
800 /****************************************************************************
801 Create an outgoing TCP socket to any of the addrs. This is for
802 simultaneous connects to port 445 and 139 of a host or even a variety
803 of DC's all of which are equivalent for our purposes.
804 **************************************************************************/
806 BOOL open_any_socket_out(struct sockaddr_in *addrs, int num_addrs,
807 int timeout, int *fd_index, int *fd)
809 int i, resulting_index, res;
817 int connect_loop = 10000; /* 10 milliseconds */
819 timeout *= 1000; /* convert to microseconds */
821 sockets = SMB_MALLOC_ARRAY(int, num_addrs);
826 resulting_index = -1;
828 for (i=0; i<num_addrs; i++)
831 for (i=0; i<num_addrs; i++) {
832 sockets[i] = socket(PF_INET, SOCK_STREAM, 0);
835 set_blocking(sockets[i], False);
839 good_connect = False;
841 for (i=0; i<num_addrs; i++) {
843 if (connect(sockets[i], (struct sockaddr *)&(addrs[i]),
844 sizeof(*addrs)) == 0) {
845 /* Rather unlikely as we are non-blocking, but it
846 * might actually happen. */
851 if (errno == EINPROGRESS || errno == EALREADY ||
853 /* These are the error messages that something is
860 /* All of the connect's resulted in real error conditions */
864 /* Lets see if any of the connect attempts succeeded */
869 for (i=0; i<num_addrs; i++) {
870 FD_SET(sockets[i], &wr_fds);
871 if (sockets[i]>maxfd)
876 tv.tv_usec = connect_loop;
878 res = sys_select(maxfd+1, NULL, &wr_fds, NULL, &tv);
886 for (i=0; i<num_addrs; i++) {
888 int sockerr, sockerr_len;
890 if (!FD_ISSET(sockets[i], &wr_fds))
893 sockerr_len = sizeof(sockerr);
895 res = getsockopt(sockets[i], SOL_SOCKET, SO_ERROR, &sockerr,
902 /* Hey, we got a connection */
910 timeout -= connect_loop;
914 if (connect_loop > timeout)
915 connect_loop = timeout;
919 for (i=0; i<num_addrs; i++) {
920 if (i == resulting_index)
926 if (resulting_index >= 0) {
927 *fd_index = resulting_index;
928 *fd = sockets[*fd_index];
929 set_blocking(*fd, True);
934 return (resulting_index >= 0);
936 /****************************************************************************
937 Open a connected UDP socket to host on port
938 **************************************************************************/
940 int open_udp_socket(const char *host, int port)
942 int type = SOCK_DGRAM;
943 struct sockaddr_in sock_out;
945 struct in_addr *addr;
947 addr = interpret_addr2(host);
949 res = socket(PF_INET, type, 0);
954 memset((char *)&sock_out,'\0',sizeof(sock_out));
955 putip((char *)&sock_out.sin_addr,(char *)addr);
956 sock_out.sin_port = htons(port);
957 sock_out.sin_family = PF_INET;
959 if (connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out))) {
968 /* the following 3 client_*() functions are nasty ways of allowing
969 some generic functions to get info that really should be hidden in
970 particular modules */
971 static int client_fd = -1;
973 void client_setfd(int fd)
978 char *client_name(void)
980 return get_peer_name(client_fd,False);
983 char *client_addr(void)
985 return get_peer_addr(client_fd);
988 char *client_socket_addr(void)
990 return get_socket_addr(client_fd);
993 int client_socket_port(void)
995 return get_socket_port(client_fd);
998 struct in_addr *client_inaddr(struct sockaddr *sa)
1000 struct sockaddr_in *sockin = (struct sockaddr_in *) (sa);
1001 socklen_t length = sizeof(*sa);
1003 if (getpeername(client_fd, sa, &length) < 0) {
1004 DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno) ));
1008 return &sockin->sin_addr;
1011 /*******************************************************************
1012 Matchname - determine if host name matches IP address. Used to
1013 confirm a hostname lookup to prevent spoof attacks.
1014 ******************************************************************/
1016 static BOOL matchname(char *remotehost,struct in_addr addr)
1021 if ((hp = sys_gethostbyname(remotehost)) == 0) {
1022 DEBUG(0,("sys_gethostbyname(%s): lookup failure.\n", remotehost));
1027 * Make sure that gethostbyname() returns the "correct" host name.
1028 * Unfortunately, gethostbyname("localhost") sometimes yields
1029 * "localhost.domain". Since the latter host name comes from the
1030 * local DNS, we just have to trust it (all bets are off if the local
1031 * DNS is perverted). We always check the address list, though.
1034 if (!strequal(remotehost, hp->h_name)
1035 && !strequal(remotehost, "localhost")) {
1036 DEBUG(0,("host name/name mismatch: %s != %s\n",
1037 remotehost, hp->h_name));
1041 /* Look up the host address in the address list we just got. */
1042 for (i = 0; hp->h_addr_list[i]; i++) {
1043 if (memcmp(hp->h_addr_list[i], (char *) & addr, sizeof(addr)) == 0)
1048 * The host name does not map to the original host address. Perhaps
1049 * someone has compromised a name server. More likely someone botched
1050 * it, but that could be dangerous, too.
1053 DEBUG(0,("host name/address mismatch: %s != %s\n",
1054 inet_ntoa(addr), hp->h_name));
1058 /*******************************************************************
1059 Return the DNS name of the remote end of a socket.
1060 ******************************************************************/
1062 char *get_peer_name(int fd, BOOL force_lookup)
1064 static pstring name_buf;
1066 static fstring addr_buf;
1068 struct in_addr addr;
1071 /* reverse lookups can be *very* expensive, and in many
1072 situations won't work because many networks don't link dhcp
1073 with dns. To avoid the delay we avoid the lookup if
1075 if (!lp_hostname_lookups() && (force_lookup == False)) {
1076 return get_peer_addr(fd);
1079 p = get_peer_addr(fd);
1081 /* it might be the same as the last one - save some DNS work */
1082 if (strcmp(p, addr_buf) == 0)
1085 pstrcpy(name_buf,"UNKNOWN");
1089 fstrcpy(addr_buf, p);
1091 addr = *interpret_addr2(p);
1093 /* Look up the remote host name. */
1094 if ((hp = gethostbyaddr((char *)&addr.s_addr, sizeof(addr.s_addr), AF_INET)) == 0) {
1095 DEBUG(1,("Gethostbyaddr failed for %s\n",p));
1096 pstrcpy(name_buf, p);
1098 pstrcpy(name_buf,(char *)hp->h_name);
1099 if (!matchname(name_buf, addr)) {
1100 DEBUG(0,("Matchname failed on %s %s\n",name_buf,p));
1101 pstrcpy(name_buf,"UNKNOWN");
1105 /* can't pass the same source and dest strings in when you
1106 use --enable-developer or the clobber_region() call will
1109 pstrcpy( tmp_name, name_buf );
1110 alpha_strcpy(name_buf, tmp_name, "_-.", sizeof(name_buf));
1111 if (strstr(name_buf,"..")) {
1112 pstrcpy(name_buf, "UNKNOWN");
1118 /*******************************************************************
1119 Return the IP addr of the remote end of a socket as a string.
1120 ******************************************************************/
1122 char *get_peer_addr(int fd)
1125 struct sockaddr_in *sockin = (struct sockaddr_in *) (&sa);
1126 socklen_t length = sizeof(sa);
1127 static fstring addr_buf;
1129 fstrcpy(addr_buf,"0.0.0.0");
1135 if (getpeername(fd, &sa, &length) < 0) {
1136 DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno) ));
1140 fstrcpy(addr_buf,(char *)inet_ntoa(sockin->sin_addr));
1145 /*******************************************************************
1146 Create protected unix domain socket.
1148 Some unixes cannot set permissions on a ux-dom-sock, so we
1149 have to make sure that the directory contains the protection
1150 permissions instead.
1151 ******************************************************************/
1153 int create_pipe_sock(const char *socket_dir,
1154 const char *socket_name,
1157 #ifdef HAVE_UNIXSOCKET
1158 struct sockaddr_un sunaddr;
1164 old_umask = umask(0);
1166 /* Create the socket directory or reuse the existing one */
1168 if (lstat(socket_dir, &st) == -1) {
1169 if (errno == ENOENT) {
1170 /* Create directory */
1171 if (mkdir(socket_dir, dir_perms) == -1) {
1172 DEBUG(0, ("error creating socket directory "
1173 "%s: %s\n", socket_dir,
1178 DEBUG(0, ("lstat failed on socket directory %s: %s\n",
1179 socket_dir, strerror(errno)));
1183 /* Check ownership and permission on existing directory */
1184 if (!S_ISDIR(st.st_mode)) {
1185 DEBUG(0, ("socket directory %s isn't a directory\n",
1189 if ((st.st_uid != sec_initial_uid()) ||
1190 ((st.st_mode & 0777) != dir_perms)) {
1191 DEBUG(0, ("invalid permissions on socket directory "
1192 "%s\n", socket_dir));
1197 /* Create the socket file */
1199 sock = socket(AF_UNIX, SOCK_STREAM, 0);
1206 pstr_sprintf(path, "%s/%s", socket_dir, socket_name);
1209 memset(&sunaddr, 0, sizeof(sunaddr));
1210 sunaddr.sun_family = AF_UNIX;
1211 safe_strcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path)-1);
1213 if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1) {
1214 DEBUG(0, ("bind failed on pipe socket %s: %s\n", path,
1219 if (listen(sock, 5) == -1) {
1220 DEBUG(0, ("listen failed on pipe socket %s: %s\n", path,
1236 DEBUG(0, ("create_pipe_sock: No Unix sockets on this system\n"));
1238 #endif /* HAVE_UNIXSOCKET */