1 const char jbsockets_rcs[] = "$Id: jbsockets.c,v 1.38 2006/07/18 14:48:46 david__schmidt Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/jbsockets.c,v $
6 * Purpose : Contains wrappers for system-specific sockets code,
7 * so that the rest of Junkbuster can be more
8 * OS-independent. Contains #ifdefs to make this work
11 * Copyright : Written by and Copyright (C) 2001 the SourceForge
12 * Privoxy team. http://www.privoxy.org/
14 * Based on the Internet Junkbuster originally written
15 * by and Copyright (C) 1997 Anonymous Coders and
16 * Junkbusters Corporation. http://www.junkbusters.com
18 * This program is free software; you can redistribute it
19 * and/or modify it under the terms of the GNU General
20 * Public License as published by the Free Software
21 * Foundation; either version 2 of the License, or (at
22 * your option) any later version.
24 * This program is distributed in the hope that it will
25 * be useful, but WITHOUT ANY WARRANTY; without even the
26 * implied warranty of MERCHANTABILITY or FITNESS FOR A
27 * PARTICULAR PURPOSE. See the GNU General Public
28 * License for more details.
30 * The GNU General Public License should be included with
31 * this file. If not, you can view it at
32 * http://www.gnu.org/copyleft/gpl.html
33 * or write to the Free Software Foundation, Inc., 59
34 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
37 * $Log: jbsockets.c,v $
38 * Revision 1.38 2006/07/18 14:48:46 david__schmidt
39 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
40 * with what was really the latest development (the v_3_0_branch branch)
42 * Revision 1.35.2.8 2006/01/21 16:16:08 david__schmidt
43 * Thanks to Edward Carrel for his patch to modernize OSX's
\rpthreads support. See bug #1409623.
45 * Revision 1.35.2.7 2005/05/07 21:50:55 david__schmidt
46 * A few memory leaks plugged (mostly on error paths)
48 * Revision 1.35.2.6 2003/12/17 16:34:40 oes
51 * Revision 1.35.2.5 2003/04/29 11:32:54 oes
52 * Don't rely on h_addr being non-NULL after gethostbyname.
53 * Works around an oddness in Max OSX and closes bug #724796
55 * Revision 1.35.2.4 2003/04/04 12:40:20 oes
56 * Made sure the errno set by bind, not close[socket] is used in
57 * bind_port. Probably fixes bugs #713777, #705562.
59 * Revision 1.35.2.3 2003/03/07 03:41:04 david__schmidt
60 * Wrapping all *_r functions (the non-_r versions of them) with mutex semaphores for OSX. Hopefully this will take care of all of those pesky crash reports.
62 * Revision 1.35.2.2 2002/11/20 14:37:24 oes
63 * Fixed Win32 error logging in bind_port.
64 * Thanks to Oliver Stoeneberg for the hint.
66 * Revision 1.35.2.1 2002/05/26 23:41:27 joergs
67 * AmigaOS: Fixed wrong type of len in write_socket()
69 * Revision 1.35 2002/04/26 15:50:04 joergs
70 * AmigaOS: No socklen_t, added AMIGA to the systems using int instead.
72 * Revision 1.34 2002/04/08 20:31:41 swa
75 * Revision 1.33 2002/04/03 16:02:18 gliptak
76 * Correcting compile warning with older gcc
78 * Revision 1.32 2002/03/31 17:18:59 jongfoster
79 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
81 * Revision 1.31 2002/03/29 03:33:13 david__schmidt
82 * Fix Mac OSX compiler warnings
84 * Revision 1.30 2002/03/27 14:32:43 david__schmidt
85 * More compiler warning message maintenance
87 * Revision 1.29 2002/03/26 22:29:54 swa
88 * we have a new homepage!
90 * Revision 1.28 2002/03/24 13:25:43 swa
91 * name change related issues
93 * Revision 1.27 2002/03/13 00:27:05 jongfoster
96 * Revision 1.26 2002/03/11 22:07:02 david__schmidt
97 * OS/2 port maintenance:
98 * - Fixed EMX build - it had decayed a little
99 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
100 * substituted a memset for now.
102 * Revision 1.25 2002/03/09 20:03:52 jongfoster
103 * - Making various functions return int rather than size_t.
104 * (Undoing a recent change). Since size_t is unsigned on
105 * Windows, functions like read_socket that return -1 on
106 * error cannot return a size_t.
108 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
109 * crashes, and also frequently caused JB to jump to 100%
110 * CPU and stay there. (Because it thought it had just
111 * read ((unsigned)-1) == 4Gb of data...)
113 * - The signature of write_socket has changed, it now simply
114 * returns success=0/failure=nonzero.
116 * - Trying to get rid of a few warnings --with-debug on
117 * Windows, I've introduced a new type "jb_socket". This is
118 * used for the socket file descriptors. On Windows, this
119 * is SOCKET (a typedef for unsigned). Everywhere else, it's
120 * an int. The error value can't be -1 any more, so it's
121 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
122 * Windows it maps to the #define INVALID_SOCKET.)
124 * - The signature of bind_port has changed.
126 * Revision 1.24 2002/03/07 03:51:36 oes
127 * - Improved handling of failed DNS lookups
128 * - Fixed compiler warnings etc
130 * Revision 1.23 2002/03/05 00:36:01 jongfoster
131 * Fixing bug 514988 - unable to restart Junkbuster
133 * Revision 1.22 2002/03/04 02:08:02 david__schmidt
134 * Enable web editing of actions file on OS/2 (it had been broken all this time!)
136 * Revision 1.21 2002/01/09 14:32:33 oes
137 * Added support for gethostbyname_r and gethostbyaddr_r.
139 * Revision 1.20 2001/11/16 00:48:48 jongfoster
140 * Enabling duplicate-socket detection for all platforms, not
143 * Revision 1.19 2001/10/25 03:40:47 david__schmidt
144 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
145 * threads to call select() simultaneously. So, it's time to do a real, live,
146 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
147 * (native). Both versions will work, but using __OS2__ offers multi-threading.
149 * Revision 1.18 2001/09/21 23:02:02 david__schmidt
150 * Cleaning up 2 compiler warnings on OS/2.
152 * Revision 1.17 2001/09/13 20:11:46 jongfoster
153 * Fixing 2 compiler warnings under Win32
155 * Revision 1.16 2001/07/30 22:08:36 jongfoster
156 * Tidying up #defines:
157 * - All feature #defines are now of the form FEATURE_xxx
158 * - Permanently turned off WIN_GUI_EDIT
159 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
161 * Revision 1.15 2001/07/29 17:40:43 jongfoster
162 * Fixed compiler warning by adding a cast
164 * Revision 1.14 2001/07/18 13:47:59 oes
165 * Eliminated dirty hack for getsockbyname()
167 * Revision 1.13 2001/07/15 13:56:57 jongfoster
168 * Removing unused local variable.
170 * Revision 1.12 2001/07/01 17:04:11 oes
171 * Bugfix: accept_connection no longer uses the obsolete hstrerror() function
173 * Revision 1.11 2001/06/29 21:45:41 oes
174 * Indentation, CRLF->LF, Tab-> Space
176 * Revision 1.10 2001/06/29 13:29:15 oes
177 * - Added remote (server) host IP to csp->http->host_ip_addr_str
178 * - Added detection of local socket IP and fqdn
179 * - Removed logentry from cancelled commit
181 * Revision 1.9 2001/06/07 23:06:09 jongfoster
182 * The host parameter to connect_to() is now const.
184 * Revision 1.8 2001/06/03 19:12:07 oes
187 * Revision 1.7 2001/05/28 16:14:00 jongfoster
188 * Fixing bug in LOG_LEVEL_LOG
190 * Revision 1.6 2001/05/26 17:28:32 jongfoster
191 * Fixed LOG_LEVEL_LOG
193 * Revision 1.5 2001/05/26 15:26:15 jongfoster
194 * ACL feature now provides more security by immediately dropping
195 * connections from untrusted hosts.
197 * Revision 1.4 2001/05/26 00:37:42 jongfoster
198 * Cosmetic indentation correction.
200 * Revision 1.3 2001/05/25 21:57:54 jongfoster
201 * Now gives a warning under Windows if you try to bind
202 * it to a port that's already in use.
204 * Revision 1.2 2001/05/17 23:01:01 oes
205 * - Cleaned CRLF's from the sources and related files
207 * Revision 1.1.1.1 2001/05/15 13:58:54 oes
208 * Initial import of version 2.9.3 source tree
211 *********************************************************************/
221 #include <sys/types.h>
229 #include <sys/timeb.h>
237 #include <sys/time.h>
238 #include <netinet/in.h>
239 #include <sys/ioctl.h>
241 #include <sys/socket.h>
244 #include <netinet/tcp.h>
246 #include <arpa/inet.h>
252 #if defined(__EMX__) || defined (__OS2__)
253 #include <sys/select.h> /* OS/2/EMX needs a little help with select */
266 /* jcc.h is for mutex semaphores only */
267 #endif /* def OSX_DARWIN */
269 #include "jbsockets.h"
273 const char jbsockets_h_rcs[] = JBSOCKETS_H_VERSION;
276 /*********************************************************************
278 * Function : connect_to
280 * Description : Open a socket and connect to it. Will check
281 * that this is allowed according to ACL.
284 * 1 : host = hostname to connect to
285 * 2 : portnum = port to connent on
286 * 3 : csp = Current client state (buffers, headers, etc...)
287 * Not modified, only used for source IP and ACL.
289 * Returns : JB_INVALID_SOCKET => failure, else it is the socket
292 *********************************************************************/
293 jb_socket connect_to(const char *host, int portnum, struct client_state *csp)
295 struct sockaddr_in inaddr;
299 struct timeval tv[1];
300 #if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA)
302 #endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
305 struct access_control_addr dst[1];
306 #endif /* def FEATURE_ACL */
308 memset((char *)&inaddr, 0, sizeof inaddr);
310 if ((addr = resolve_hostname_to_ip(host)) == INADDR_NONE)
312 csp->http->host_ip_addr_str = strdup("unknown");
313 return(JB_INVALID_SOCKET);
317 dst->addr = ntohl((unsigned long) addr);
320 if (block_acl(dst, csp))
327 return(JB_INVALID_SOCKET);
329 #endif /* def FEATURE_ACL */
331 inaddr.sin_addr.s_addr = addr;
332 inaddr.sin_family = AF_INET;
333 csp->http->host_ip_addr_str = strdup(inet_ntoa(inaddr.sin_addr));
336 if (sizeof(inaddr.sin_port) == sizeof(short))
337 #endif /* ndef _WIN32 */
339 inaddr.sin_port = htons((unsigned short) portnum);
344 inaddr.sin_port = htonl((unsigned long)portnum);
346 #endif /* ndef _WIN32 */
349 if ((fd = socket(inaddr.sin_family, SOCK_STREAM, 0)) == JB_INVALID_SOCKET)
351 if ((fd = socket(inaddr.sin_family, SOCK_STREAM, 0)) < 0)
354 return(JB_INVALID_SOCKET);
358 { /* turn off TCP coalescence */
360 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &mi, sizeof (int));
362 #endif /* def TCP_NODELAY */
364 #if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
365 if ((flags = fcntl(fd, F_GETFL, 0)) != -1)
368 fcntl(fd, F_SETFL, flags);
370 #endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) */
372 while (connect(fd, (struct sockaddr *) & inaddr, sizeof inaddr) == JB_INVALID_SOCKET)
375 if (errno == WSAEINPROGRESS)
377 if (sock_errno() == EINPROGRESS)
378 #else /* ifndef _WIN32 */
379 if (errno == EINPROGRESS)
380 #endif /* ndef _WIN32 || __OS2__ */
386 if (sock_errno() != EINTR)
392 return(JB_INVALID_SOCKET);
396 #if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
400 fcntl(fd, F_SETFL, flags);
402 #endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) */
404 /* wait for connection to complete */
411 /* MS Windows uses int, not SOCKET, for the 1st arg of select(). Wierd! */
412 if (select((int)fd + 1, NULL, &wfds, NULL, tv) <= 0)
415 return(JB_INVALID_SOCKET);
422 /*********************************************************************
424 * Function : write_socket
426 * Description : Write the contents of buf (for n bytes) to socket fd.
429 * 1 : fd = file descriptor (aka. handle) of socket to write to.
430 * 2 : buf = pointer to data to be written.
431 * 3 : len = length of data to be written to the socket "fd".
433 * Returns : 0 on success (entire buffer sent).
436 *********************************************************************/
438 int write_socket(jb_socket fd, const char *buf, ssize_t len)
440 int write_socket(jb_socket fd, const char *buf, size_t len)
448 if (len < 0) /* constant condition - size_t isn't ever negative */
453 log_error(LOG_LEVEL_LOG, "%N", len, buf);
456 return (send(fd, buf, (int)len, 0) != (int)len);
457 #elif defined(__BEOS__) || defined(AMIGA)
458 return (send(fd, buf, len, 0) != len);
459 #elif defined(__OS2__)
461 * Break the data up into SOCKET_SEND_MAX chunks for sending...
462 * OS/2 seemed to complain when the chunks were too large.
464 #define SOCKET_SEND_MAX 65000
466 int write_len = 0, send_len, send_rc = 0, i = 0;
467 while ((i < len) && (send_rc != -1))
469 if ((i + SOCKET_SEND_MAX) > len)
472 send_len = SOCKET_SEND_MAX;
473 send_rc = send(fd,(char*)buf + i, send_len, 0);
481 return (write(fd, buf, len) != len);
487 /*********************************************************************
489 * Function : read_socket
491 * Description : Read from a TCP/IP socket in a platform independent way.
494 * 1 : fd = file descriptor of the socket to read
495 * 2 : buf = pointer to buffer where data will be written
496 * Must be >= len bytes long.
497 * 3 : len = maximum number of bytes to read
499 * Returns : On success, the number of bytes read is returned (zero
500 * indicates end of file), and the file position is advanced
501 * by this number. It is not an error if this number is
502 * smaller than the number of bytes requested; this may hap-
503 * pen for example because fewer bytes are actually available
504 * right now (maybe because we were close to end-of-file, or
505 * because we are reading from a pipe, or from a terminal,
506 * or because read() was interrupted by a signal). On error,
507 * -1 is returned, and errno is set appropriately. In this
508 * case it is left unspecified whether the file position (if
511 *********************************************************************/
512 int read_socket(jb_socket fd, char *buf, int len)
520 return(recv(fd, buf, len, 0));
521 #elif defined(__BEOS__) || defined(AMIGA) || defined(__OS2__)
522 return(recv(fd, buf, (size_t)len, 0));
524 return(read(fd, buf, (size_t)len));
529 /*********************************************************************
531 * Function : close_socket
533 * Description : Closes a TCP/IP socket
536 * 1 : fd = file descriptor of socket to be closed
540 *********************************************************************/
541 void close_socket(jb_socket fd)
543 #if defined(_WIN32) || defined(__BEOS__)
547 #elif defined(__OS2__)
556 /*********************************************************************
558 * Function : bind_port
560 * Description : Call socket, set socket options, and listen.
561 * Called by listen_loop to "boot up" our proxy address.
564 * 1 : hostnam = TCP/IP address to bind/listen to
565 * 2 : portnum = port to listen on
566 * 3 : pfd = pointer used to return file descriptor.
568 * Returns : if success, returns 0 and sets *pfd.
569 * if failure, returns -3 if address is in use,
570 * -2 if address unresolvable,
572 *********************************************************************/
573 int bind_port(const char *hostnam, int portnum, jb_socket *pfd)
575 struct sockaddr_in inaddr;
579 #endif /* ndef _WIN32 */
581 *pfd = JB_INVALID_SOCKET;
583 memset((char *)&inaddr, '\0', sizeof inaddr);
585 inaddr.sin_family = AF_INET;
586 inaddr.sin_addr.s_addr = resolve_hostname_to_ip(hostnam);
588 if (inaddr.sin_addr.s_addr == INADDR_NONE)
594 if (sizeof(inaddr.sin_port) == sizeof(short))
595 #endif /* ndef _WIN32 */
597 inaddr.sin_port = htons((unsigned short) portnum);
602 inaddr.sin_port = htonl((unsigned long) portnum);
604 #endif /* ndef _WIN32 */
606 fd = socket(AF_INET, SOCK_STREAM, 0);
609 if (fd == JB_INVALID_SOCKET)
619 * This is not needed for Win32 - in fact, it stops
620 * duplicate instances of Privoxy from being caught.
622 * On UNIX, we assume the user is sensible enough not
623 * to start Junkbuster multiple times on the same IP.
624 * Without this, stopping and restarting Privoxy
625 * from a script fails.
626 * Note: SO_REUSEADDR is meant to only take over
627 * sockets which are *not* in listen state in Linux,
628 * e.g. sockets in TIME_WAIT. YMMV.
630 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&one, sizeof(one));
631 #endif /* ndef _WIN32 */
633 if (bind(fd, (struct sockaddr *)&inaddr, sizeof(inaddr)) < 0)
636 errno = WSAGetLastError();
637 if (errno == WSAEADDRINUSE)
639 if (errno == EADDRINUSE)
652 while (listen(fd, 5) == -1)
666 /*********************************************************************
668 * Function : accept_connection
670 * Description : Accepts a connection on a socket. Socket must have
671 * been created using bind_port().
674 * 1 : csp = Client state, cfd, ip_addr_str, and
675 * ip_addr_long will be set by this routine.
676 * 2 : fd = file descriptor returned from bind_port
678 * Returns : when a connection is accepted, it returns 1 (TRUE).
679 * On an error it returns 0 (FALSE).
681 *********************************************************************/
682 int accept_connection(struct client_state * csp, jb_socket fd)
684 struct sockaddr_in client, server;
685 struct hostent *host = NULL;
687 #if defined(_WIN32) || defined(__OS2__) || defined(__APPLE_CC__) || defined(AMIGA)
688 /* Wierdness - fix a warning. */
689 int c_length, s_length;
691 socklen_t c_length, s_length;
693 #if defined(HAVE_GETHOSTBYADDR_R_8_ARGS) || defined(HAVE_GETHOSTBYADDR_R_7_ARGS) || defined(HAVE_GETHOSTBYADDR_R_5_ARGS)
694 struct hostent result;
695 #if defined(HAVE_GETHOSTBYADDR_R_5_ARGS)
696 struct hostent_data hdata;
698 char hbuf[HOSTENT_BUFFER_SIZE];
700 #endif /* def HAVE_GETHOSTBYADDR_R_5_ARGS */
701 #endif /* def HAVE_GETHOSTBYADDR_R_(8|7|5)_ARGS */
703 c_length = s_length = sizeof(client);
706 afd = accept (fd, (struct sockaddr *) &client, &c_length);
707 if (afd == JB_INVALID_SOCKET)
714 afd = accept (fd, (struct sockaddr *) &client, &c_length);
715 } while (afd < 1 && errno == EINTR);
723 * Determine the IP-Adress that the client used to reach us
724 * and the hostname associated with that address
726 if (!getsockname(afd, (struct sockaddr *) &server, &s_length))
728 csp->my_ip_addr_str = strdup(inet_ntoa(server.sin_addr));
729 #if defined(HAVE_GETHOSTBYADDR_R_8_ARGS)
730 gethostbyaddr_r((const char *)&server.sin_addr,
731 sizeof(server.sin_addr), AF_INET,
732 &result, hbuf, HOSTENT_BUFFER_SIZE,
734 #elif defined(HAVE_GETHOSTBYADDR_R_7_ARGS)
735 host = gethostbyaddr_r((const char *)&server.sin_addr,
736 sizeof(server.sin_addr), AF_INET,
737 &result, hbuf, HOSTENT_BUFFER_SIZE, &thd_err);
738 #elif defined(HAVE_GETHOSTBYADDR_R_5_ARGS)
739 if (0 == gethostbyaddr_r((const char *)&server.sin_addr,
740 sizeof(server.sin_addr), AF_INET,
749 #elif defined(OSX_DARWIN)
750 pthread_mutex_lock(&gethostbyaddr_mutex);
751 host = gethostbyaddr((const char *)&server.sin_addr,
752 sizeof(server.sin_addr), AF_INET);
753 pthread_mutex_unlock(&gethostbyaddr_mutex);
755 host = gethostbyaddr((const char *)&server.sin_addr,
756 sizeof(server.sin_addr), AF_INET);
760 log_error(LOG_LEVEL_ERROR, "Unable to get my own hostname: %E\n");
764 csp->my_hostname = strdup(host->h_name);
769 csp->ip_addr_str = strdup(inet_ntoa(client.sin_addr));
770 csp->ip_addr_long = ntohl(client.sin_addr.s_addr);
777 /*********************************************************************
779 * Function : resolve_hostname_to_ip
781 * Description : Resolve a hostname to an internet tcp/ip address.
782 * NULL or an empty string resolve to INADDR_ANY.
785 * 1 : host = hostname to resolve
787 * Returns : INADDR_NONE => failure, INADDR_ANY or tcp/ip address if succesful.
789 *********************************************************************/
790 unsigned long resolve_hostname_to_ip(const char *host)
792 struct sockaddr_in inaddr;
793 struct hostent *hostp;
794 unsigned int dns_retries = 0;
795 #if defined(HAVE_GETHOSTBYNAME_R_6_ARGS) || defined(HAVE_GETHOSTBYNAME_R_5_ARGS) || defined(HAVE_GETHOSTBYNAME_R_3_ARGS)
796 struct hostent result;
797 #if defined(HAVE_GETHOSTBYNAME_R_6_ARGS) || defined(HAVE_GETHOSTBYNAME_R_5_ARGS)
798 char hbuf[HOSTENT_BUFFER_SIZE];
800 #else /* defined(HAVE_GETHOSTBYNAME_R_3_ARGS) */
801 struct hostent_data hdata;
802 #endif /* def HAVE_GETHOSTBYNAME_R_(6|5)_ARGS */
803 #endif /* def HAVE_GETHOSTBYNAME_R_(6|5|3)_ARGS */
805 if ((host == NULL) || (*host == '\0'))
810 memset((char *) &inaddr, 0, sizeof inaddr);
812 if ((inaddr.sin_addr.s_addr = inet_addr(host)) == -1)
814 #if defined(HAVE_GETHOSTBYNAME_R_6_ARGS)
815 while ( gethostbyname_r(host, &result, hbuf,
816 HOSTENT_BUFFER_SIZE, &hostp, &thd_err)
817 && (thd_err == TRY_AGAIN) && (dns_retries++ < 10) )
819 log_error(LOG_LEVEL_ERROR, "Timeout #%u while trying to resolve %s. Trying again.",
822 #elif defined(HAVE_GETHOSTBYNAME_R_5_ARGS)
823 hostp = gethostbyname_r(host, &result, hbuf,
824 HOSTENT_BUFFER_SIZE, &thd_err);
825 #elif defined(HAVE_GETHOSTBYNAME_R_3_ARGS)
826 if (0 == gethostbyname_r(host, &result, &hdata))
835 pthread_mutex_lock(&gethostbyname_mutex);
836 while ( NULL == (hostp = gethostbyname(host))
837 && (h_errno == TRY_AGAIN) && (dns_retries++ < 10) )
839 log_error(LOG_LEVEL_ERROR, "Timeout #%u while trying to resolve %s. Trying again.",
842 pthread_mutex_unlock(&gethostbyname_mutex);
844 while ( NULL == (hostp = gethostbyname(host))
845 && (h_errno == TRY_AGAIN) && (dns_retries++ < 10) )
847 log_error(LOG_LEVEL_ERROR, "Timeout #%u while trying to resolve %s. Trying again.",
850 #endif /* def HAVE_GETHOSTBYNAME_R_(6|5|3)_ARGS */
852 * On Mac OSX, if a domain exists but doesn't have a type A
853 * record associated with it, the h_addr member of the struct
854 * hostent returned by gethostbyname is NULL, even if h_length
855 * is 4. Therefore the second test below.
857 if (hostp == NULL || hostp->h_addr == NULL)
860 log_error(LOG_LEVEL_ERROR, "could not resolve hostname %s", host);
863 if (hostp->h_addrtype != AF_INET)
866 errno = WSAEPROTOTYPE;
870 log_error(LOG_LEVEL_ERROR, "hostname %s resolves to unknown address type.", host);
874 (char *) &inaddr.sin_addr,
875 (char *) hostp->h_addr,
876 sizeof(inaddr.sin_addr)
879 return(inaddr.sin_addr.s_addr);