1 const char jbsockets_rcs[] = "$Id: jbsockets.c,v 1.47 2008/03/26 18:07:07 fabiankeil 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) 2001-2007 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 1.47 2008/03/26 18:07:07 fabiankeil
39 * Add hostname directive. Closes PR#1918189.
41 * Revision 1.46 2008/03/21 11:13:57 fabiankeil
42 * Only gather host information if it's actually needed.
43 * Also move the code out of accept_connection() so it's less likely
44 * to delay other incoming connections if the host is misconfigured.
46 * Revision 1.45 2007/09/30 16:59:22 fabiankeil
47 * Set the maximum listen() backlog to 128. Apparently SOMAXCONN is
48 * neither high enough, nor a hard limit on mingw32. Again for BR#1795281.
50 * Revision 1.44 2007/09/15 13:01:31 fabiankeil
51 * Increase listen() backlog to SOMAXCONN (or 128) to decrease
52 * chances of dropped connections under load. Problem reported
53 * and fix suggested by nobody in BR#1795281.
55 * Revision 1.43 2007/06/01 18:16:36 fabiankeil
56 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
57 * deadlocks and crashes on OpenBSD and possibly other OS with neither
58 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
59 * Thanks to Ralf Horstmann for report and solution.
61 * Revision 1.42 2007/04/01 17:37:07 fabiankeil
62 * - Add DNS retries for Solaris and other systems
63 * whose gethostbyname_r version takes five arguments.
64 * - Move maximum number of DNS retries into a macro.
66 * Revision 1.41 2006/11/13 19:05:51 fabiankeil
67 * Make pthread mutex locking more generic. Instead of
68 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
69 * and use mutex locking unless there is an _r function
70 * available. Better safe than sorry.
72 * Fixes "./configure --disable-pthread" and should result
73 * in less threading-related problems on pthread-using platforms,
74 * but it still doesn't fix BR#1122404.
76 * Revision 1.40 2006/09/02 15:36:42 fabiankeil
77 * Follow the OpenBSD port's lead and protect the resolve
78 * functions on OpenBSD as well.
80 * Revision 1.39 2006/08/03 02:46:41 david__schmidt
81 * Incorporate Fabian Keil's patch work:
\rhttp://www.fabiankeil.de/sourcecode/privoxy/
83 * Revision 1.38 2006/07/18 14:48:46 david__schmidt
84 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
85 * with what was really the latest development (the v_3_0_branch branch)
87 * Revision 1.35.2.8 2006/01/21 16:16:08 david__schmidt
88 * Thanks to Edward Carrel for his patch to modernize OSX's
\rpthreads support. See bug #1409623.
90 * Revision 1.35.2.7 2005/05/07 21:50:55 david__schmidt
91 * A few memory leaks plugged (mostly on error paths)
93 * Revision 1.35.2.6 2003/12/17 16:34:40 oes
96 * Revision 1.35.2.5 2003/04/29 11:32:54 oes
97 * Don't rely on h_addr being non-NULL after gethostbyname.
98 * Works around an oddness in Max OSX and closes bug #724796
100 * Revision 1.35.2.4 2003/04/04 12:40:20 oes
101 * Made sure the errno set by bind, not close[socket] is used in
102 * bind_port. Probably fixes bugs #713777, #705562.
104 * Revision 1.35.2.3 2003/03/07 03:41:04 david__schmidt
105 * 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.
107 * Revision 1.35.2.2 2002/11/20 14:37:24 oes
108 * Fixed Win32 error logging in bind_port.
109 * Thanks to Oliver Stoeneberg for the hint.
111 * Revision 1.35.2.1 2002/05/26 23:41:27 joergs
112 * AmigaOS: Fixed wrong type of len in write_socket()
114 * Revision 1.35 2002/04/26 15:50:04 joergs
115 * AmigaOS: No socklen_t, added AMIGA to the systems using int instead.
117 * Revision 1.34 2002/04/08 20:31:41 swa
120 * Revision 1.33 2002/04/03 16:02:18 gliptak
121 * Correcting compile warning with older gcc
123 * Revision 1.32 2002/03/31 17:18:59 jongfoster
124 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
126 * Revision 1.31 2002/03/29 03:33:13 david__schmidt
127 * Fix Mac OSX compiler warnings
129 * Revision 1.30 2002/03/27 14:32:43 david__schmidt
130 * More compiler warning message maintenance
132 * Revision 1.29 2002/03/26 22:29:54 swa
133 * we have a new homepage!
135 * Revision 1.28 2002/03/24 13:25:43 swa
136 * name change related issues
138 * Revision 1.27 2002/03/13 00:27:05 jongfoster
141 * Revision 1.26 2002/03/11 22:07:02 david__schmidt
142 * OS/2 port maintenance:
143 * - Fixed EMX build - it had decayed a little
144 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
145 * substituted a memset for now.
147 * Revision 1.25 2002/03/09 20:03:52 jongfoster
148 * - Making various functions return int rather than size_t.
149 * (Undoing a recent change). Since size_t is unsigned on
150 * Windows, functions like read_socket that return -1 on
151 * error cannot return a size_t.
153 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
154 * crashes, and also frequently caused JB to jump to 100%
155 * CPU and stay there. (Because it thought it had just
156 * read ((unsigned)-1) == 4Gb of data...)
158 * - The signature of write_socket has changed, it now simply
159 * returns success=0/failure=nonzero.
161 * - Trying to get rid of a few warnings --with-debug on
162 * Windows, I've introduced a new type "jb_socket". This is
163 * used for the socket file descriptors. On Windows, this
164 * is SOCKET (a typedef for unsigned). Everywhere else, it's
165 * an int. The error value can't be -1 any more, so it's
166 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
167 * Windows it maps to the #define INVALID_SOCKET.)
169 * - The signature of bind_port has changed.
171 * Revision 1.24 2002/03/07 03:51:36 oes
172 * - Improved handling of failed DNS lookups
173 * - Fixed compiler warnings etc
175 * Revision 1.23 2002/03/05 00:36:01 jongfoster
176 * Fixing bug 514988 - unable to restart Junkbuster
178 * Revision 1.22 2002/03/04 02:08:02 david__schmidt
179 * Enable web editing of actions file on OS/2 (it had been broken all this time!)
181 * Revision 1.21 2002/01/09 14:32:33 oes
182 * Added support for gethostbyname_r and gethostbyaddr_r.
184 * Revision 1.20 2001/11/16 00:48:48 jongfoster
185 * Enabling duplicate-socket detection for all platforms, not
188 * Revision 1.19 2001/10/25 03:40:47 david__schmidt
189 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
190 * threads to call select() simultaneously. So, it's time to do a real, live,
191 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
192 * (native). Both versions will work, but using __OS2__ offers multi-threading.
194 * Revision 1.18 2001/09/21 23:02:02 david__schmidt
195 * Cleaning up 2 compiler warnings on OS/2.
197 * Revision 1.17 2001/09/13 20:11:46 jongfoster
198 * Fixing 2 compiler warnings under Win32
200 * Revision 1.16 2001/07/30 22:08:36 jongfoster
201 * Tidying up #defines:
202 * - All feature #defines are now of the form FEATURE_xxx
203 * - Permanently turned off WIN_GUI_EDIT
204 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
206 * Revision 1.15 2001/07/29 17:40:43 jongfoster
207 * Fixed compiler warning by adding a cast
209 * Revision 1.14 2001/07/18 13:47:59 oes
210 * Eliminated dirty hack for getsockbyname()
212 * Revision 1.13 2001/07/15 13:56:57 jongfoster
213 * Removing unused local variable.
215 * Revision 1.12 2001/07/01 17:04:11 oes
216 * Bugfix: accept_connection no longer uses the obsolete hstrerror() function
218 * Revision 1.11 2001/06/29 21:45:41 oes
219 * Indentation, CRLF->LF, Tab-> Space
221 * Revision 1.10 2001/06/29 13:29:15 oes
222 * - Added remote (server) host IP to csp->http->host_ip_addr_str
223 * - Added detection of local socket IP and fqdn
224 * - Removed logentry from cancelled commit
226 * Revision 1.9 2001/06/07 23:06:09 jongfoster
227 * The host parameter to connect_to() is now const.
229 * Revision 1.8 2001/06/03 19:12:07 oes
232 * Revision 1.7 2001/05/28 16:14:00 jongfoster
233 * Fixing bug in LOG_LEVEL_LOG
235 * Revision 1.6 2001/05/26 17:28:32 jongfoster
236 * Fixed LOG_LEVEL_LOG
238 * Revision 1.5 2001/05/26 15:26:15 jongfoster
239 * ACL feature now provides more security by immediately dropping
240 * connections from untrusted hosts.
242 * Revision 1.4 2001/05/26 00:37:42 jongfoster
243 * Cosmetic indentation correction.
245 * Revision 1.3 2001/05/25 21:57:54 jongfoster
246 * Now gives a warning under Windows if you try to bind
247 * it to a port that's already in use.
249 * Revision 1.2 2001/05/17 23:01:01 oes
250 * - Cleaned CRLF's from the sources and related files
252 * Revision 1.1.1.1 2001/05/15 13:58:54 oes
253 * Initial import of version 2.9.3 source tree
256 *********************************************************************/
266 #include <sys/types.h>
274 #include <sys/timeb.h>
282 #include <sys/time.h>
283 #include <netinet/in.h>
284 #include <sys/ioctl.h>
286 #include <sys/socket.h>
289 #include <netinet/tcp.h>
291 #include <arpa/inet.h>
297 #if defined(__EMX__) || defined (__OS2__)
298 #include <sys/select.h> /* OS/2/EMX needs a little help with select */
308 #ifdef FEATURE_PTHREAD
310 /* jcc.h is for mutex semaphores only */
311 #endif /* def FEATURE_PTHREAD */
313 #include "jbsockets.h"
317 const char jbsockets_h_rcs[] = JBSOCKETS_H_VERSION;
320 * Maximum number of gethostbyname(_r) retries in case of
321 * soft errors (TRY_AGAIN).
322 * XXX: Does it make sense to make this a config option?
324 #define MAX_DNS_RETRIES 10
326 #define MAX_LISTEN_BACKLOG 128
329 /*********************************************************************
331 * Function : connect_to
333 * Description : Open a socket and connect to it. Will check
334 * that this is allowed according to ACL.
337 * 1 : host = hostname to connect to
338 * 2 : portnum = port to connent on
339 * 3 : csp = Current client state (buffers, headers, etc...)
340 * Not modified, only used for source IP and ACL.
342 * Returns : JB_INVALID_SOCKET => failure, else it is the socket
345 *********************************************************************/
346 jb_socket connect_to(const char *host, int portnum, struct client_state *csp)
348 struct sockaddr_in inaddr;
352 struct timeval tv[1];
353 #if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA)
355 #endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
358 struct access_control_addr dst[1];
359 #endif /* def FEATURE_ACL */
361 memset((char *)&inaddr, 0, sizeof inaddr);
363 if ((addr = resolve_hostname_to_ip(host)) == INADDR_NONE)
365 csp->http->host_ip_addr_str = strdup("unknown");
366 return(JB_INVALID_SOCKET);
370 dst->addr = ntohl((unsigned long) addr);
373 if (block_acl(dst, csp))
380 return(JB_INVALID_SOCKET);
382 #endif /* def FEATURE_ACL */
384 inaddr.sin_addr.s_addr = addr;
385 inaddr.sin_family = AF_INET;
386 csp->http->host_ip_addr_str = strdup(inet_ntoa(inaddr.sin_addr));
389 if (sizeof(inaddr.sin_port) == sizeof(short))
390 #endif /* ndef _WIN32 */
392 inaddr.sin_port = htons((unsigned short) portnum);
397 inaddr.sin_port = htonl((unsigned long)portnum);
399 #endif /* ndef _WIN32 */
402 if ((fd = socket(inaddr.sin_family, SOCK_STREAM, 0)) == JB_INVALID_SOCKET)
404 if ((fd = socket(inaddr.sin_family, SOCK_STREAM, 0)) < 0)
407 return(JB_INVALID_SOCKET);
411 { /* turn off TCP coalescence */
413 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &mi, sizeof (int));
415 #endif /* def TCP_NODELAY */
417 #if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
418 if ((flags = fcntl(fd, F_GETFL, 0)) != -1)
421 fcntl(fd, F_SETFL, flags);
423 #endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) */
425 while (connect(fd, (struct sockaddr *) & inaddr, sizeof inaddr) == JB_INVALID_SOCKET)
428 if (errno == WSAEINPROGRESS)
430 if (sock_errno() == EINPROGRESS)
431 #else /* ifndef _WIN32 */
432 if (errno == EINPROGRESS)
433 #endif /* ndef _WIN32 || __OS2__ */
439 if (sock_errno() != EINTR)
445 return(JB_INVALID_SOCKET);
449 #if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
453 fcntl(fd, F_SETFL, flags);
455 #endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) */
457 /* wait for connection to complete */
464 /* MS Windows uses int, not SOCKET, for the 1st arg of select(). Wierd! */
465 if (select((int)fd + 1, NULL, &wfds, NULL, tv) <= 0)
468 return(JB_INVALID_SOCKET);
475 /*********************************************************************
477 * Function : write_socket
479 * Description : Write the contents of buf (for n bytes) to socket fd.
482 * 1 : fd = file descriptor (aka. handle) of socket to write to.
483 * 2 : buf = pointer to data to be written.
484 * 3 : len = length of data to be written to the socket "fd".
486 * Returns : 0 on success (entire buffer sent).
489 *********************************************************************/
491 int write_socket(jb_socket fd, const char *buf, ssize_t len)
493 int write_socket(jb_socket fd, const char *buf, size_t len)
501 if (len < 0) /* constant condition - size_t isn't ever negative */
506 log_error(LOG_LEVEL_LOG, "%N", len, buf);
509 return (send(fd, buf, (int)len, 0) != (int)len);
510 #elif defined(__BEOS__) || defined(AMIGA)
511 return (send(fd, buf, len, 0) != len);
512 #elif defined(__OS2__)
514 * Break the data up into SOCKET_SEND_MAX chunks for sending...
515 * OS/2 seemed to complain when the chunks were too large.
517 #define SOCKET_SEND_MAX 65000
519 int write_len = 0, send_len, send_rc = 0, i = 0;
520 while ((i < len) && (send_rc != -1))
522 if ((i + SOCKET_SEND_MAX) > len)
525 send_len = SOCKET_SEND_MAX;
526 send_rc = send(fd,(char*)buf + i, send_len, 0);
534 return (write(fd, buf, len) != len);
540 /*********************************************************************
542 * Function : read_socket
544 * Description : Read from a TCP/IP socket in a platform independent way.
547 * 1 : fd = file descriptor of the socket to read
548 * 2 : buf = pointer to buffer where data will be written
549 * Must be >= len bytes long.
550 * 3 : len = maximum number of bytes to read
552 * Returns : On success, the number of bytes read is returned (zero
553 * indicates end of file), and the file position is advanced
554 * by this number. It is not an error if this number is
555 * smaller than the number of bytes requested; this may hap-
556 * pen for example because fewer bytes are actually available
557 * right now (maybe because we were close to end-of-file, or
558 * because we are reading from a pipe, or from a terminal,
559 * or because read() was interrupted by a signal). On error,
560 * -1 is returned, and errno is set appropriately. In this
561 * case it is left unspecified whether the file position (if
564 *********************************************************************/
565 int read_socket(jb_socket fd, char *buf, int len)
573 return(recv(fd, buf, len, 0));
574 #elif defined(__BEOS__) || defined(AMIGA) || defined(__OS2__)
575 return(recv(fd, buf, (size_t)len, 0));
577 return(read(fd, buf, (size_t)len));
582 /*********************************************************************
584 * Function : close_socket
586 * Description : Closes a TCP/IP socket
589 * 1 : fd = file descriptor of socket to be closed
593 *********************************************************************/
594 void close_socket(jb_socket fd)
596 #if defined(_WIN32) || defined(__BEOS__)
600 #elif defined(__OS2__)
609 /*********************************************************************
611 * Function : bind_port
613 * Description : Call socket, set socket options, and listen.
614 * Called by listen_loop to "boot up" our proxy address.
617 * 1 : hostnam = TCP/IP address to bind/listen to
618 * 2 : portnum = port to listen on
619 * 3 : pfd = pointer used to return file descriptor.
621 * Returns : if success, returns 0 and sets *pfd.
622 * if failure, returns -3 if address is in use,
623 * -2 if address unresolvable,
625 *********************************************************************/
626 int bind_port(const char *hostnam, int portnum, jb_socket *pfd)
628 struct sockaddr_in inaddr;
632 #endif /* ndef _WIN32 */
634 *pfd = JB_INVALID_SOCKET;
636 memset((char *)&inaddr, '\0', sizeof inaddr);
638 inaddr.sin_family = AF_INET;
639 inaddr.sin_addr.s_addr = resolve_hostname_to_ip(hostnam);
641 if (inaddr.sin_addr.s_addr == INADDR_NONE)
647 if (sizeof(inaddr.sin_port) == sizeof(short))
648 #endif /* ndef _WIN32 */
650 inaddr.sin_port = htons((unsigned short) portnum);
655 inaddr.sin_port = htonl((unsigned long) portnum);
657 #endif /* ndef _WIN32 */
659 fd = socket(AF_INET, SOCK_STREAM, 0);
662 if (fd == JB_INVALID_SOCKET)
672 * This is not needed for Win32 - in fact, it stops
673 * duplicate instances of Privoxy from being caught.
675 * On UNIX, we assume the user is sensible enough not
676 * to start Privoxy multiple times on the same IP.
677 * Without this, stopping and restarting Privoxy
678 * from a script fails.
679 * Note: SO_REUSEADDR is meant to only take over
680 * sockets which are *not* in listen state in Linux,
681 * e.g. sockets in TIME_WAIT. YMMV.
683 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&one, sizeof(one));
684 #endif /* ndef _WIN32 */
686 if (bind(fd, (struct sockaddr *)&inaddr, sizeof(inaddr)) < 0)
689 errno = WSAGetLastError();
690 if (errno == WSAEADDRINUSE)
692 if (errno == EADDRINUSE)
705 while (listen(fd, MAX_LISTEN_BACKLOG) == -1)
719 /*********************************************************************
721 * Function : get_host_information
723 * Description : Determines the IP address the client used to
724 * reach us and the hostname associated with it.
726 * XXX: Most of the code has been copy and pasted
727 * from accept_connection() and not all of the
728 * ifdefs paths have been tested afterwards.
731 * 1 : afd = File descriptor returned from accept().
732 * 2 : ip_address = Pointer to return the pointer to
733 * the ip address string.
734 * 3 : hostname = Pointer to return the pointer to
735 * the hostname or NULL if the caller
736 * isn't interested in it.
740 *********************************************************************/
741 void get_host_information(jb_socket afd, char **ip_address, char **hostname)
743 struct sockaddr_in server;
744 struct hostent *host = NULL;
745 #if defined(_WIN32) || defined(__OS2__) || defined(__APPLE_CC__) || defined(AMIGA)
746 /* according to accept_connection() this fixes a warning. */
751 #if defined(HAVE_GETHOSTBYADDR_R_8_ARGS) || defined(HAVE_GETHOSTBYADDR_R_7_ARGS) || defined(HAVE_GETHOSTBYADDR_R_5_ARGS)
752 struct hostent result;
753 #if defined(HAVE_GETHOSTBYADDR_R_5_ARGS)
754 struct hostent_data hdata;
756 char hbuf[HOSTENT_BUFFER_SIZE];
758 #endif /* def HAVE_GETHOSTBYADDR_R_5_ARGS */
759 #endif /* def HAVE_GETHOSTBYADDR_R_(8|7|5)_ARGS */
760 s_length = sizeof(server);
762 if (NULL != hostname)
768 if (!getsockname(afd, (struct sockaddr *) &server, &s_length))
770 *ip_address = strdup(inet_ntoa(server.sin_addr));
772 if (NULL == hostname)
775 * We're done here, the caller isn't
776 * interested in knowing the hostname.
780 #if defined(HAVE_GETHOSTBYADDR_R_8_ARGS)
781 gethostbyaddr_r((const char *)&server.sin_addr,
782 sizeof(server.sin_addr), AF_INET,
783 &result, hbuf, HOSTENT_BUFFER_SIZE,
785 #elif defined(HAVE_GETHOSTBYADDR_R_7_ARGS)
786 host = gethostbyaddr_r((const char *)&server.sin_addr,
787 sizeof(server.sin_addr), AF_INET,
788 &result, hbuf, HOSTENT_BUFFER_SIZE, &thd_err);
789 #elif defined(HAVE_GETHOSTBYADDR_R_5_ARGS)
790 if (0 == gethostbyaddr_r((const char *)&server.sin_addr,
791 sizeof(server.sin_addr), AF_INET,
800 #elif FEATURE_PTHREAD
801 privoxy_mutex_lock(&resolver_mutex);
802 host = gethostbyaddr((const char *)&server.sin_addr,
803 sizeof(server.sin_addr), AF_INET);
804 privoxy_mutex_unlock(&resolver_mutex);
806 host = gethostbyaddr((const char *)&server.sin_addr,
807 sizeof(server.sin_addr), AF_INET);
811 log_error(LOG_LEVEL_ERROR, "Unable to get my own hostname: %E\n");
815 *hostname = strdup(host->h_name);
823 /*********************************************************************
825 * Function : accept_connection
827 * Description : Accepts a connection on a socket. Socket must have
828 * been created using bind_port().
831 * 1 : csp = Client state, cfd, ip_addr_str, and
832 * ip_addr_long will be set by this routine.
833 * 2 : fd = file descriptor returned from bind_port
835 * Returns : when a connection is accepted, it returns 1 (TRUE).
836 * On an error it returns 0 (FALSE).
838 *********************************************************************/
839 int accept_connection(struct client_state * csp, jb_socket fd)
841 struct sockaddr_in client;
843 #if defined(_WIN32) || defined(__OS2__) || defined(__APPLE_CC__) || defined(AMIGA)
844 /* Wierdness - fix a warning. */
850 c_length = sizeof(client);
853 afd = accept (fd, (struct sockaddr *) &client, &c_length);
854 if (afd == JB_INVALID_SOCKET)
861 afd = accept (fd, (struct sockaddr *) &client, &c_length);
862 } while (afd < 1 && errno == EINTR);
870 csp->ip_addr_str = strdup(inet_ntoa(client.sin_addr));
871 csp->ip_addr_long = ntohl(client.sin_addr.s_addr);
878 /*********************************************************************
880 * Function : resolve_hostname_to_ip
882 * Description : Resolve a hostname to an internet tcp/ip address.
883 * NULL or an empty string resolve to INADDR_ANY.
886 * 1 : host = hostname to resolve
888 * Returns : INADDR_NONE => failure, INADDR_ANY or tcp/ip address if succesful.
890 *********************************************************************/
891 unsigned long resolve_hostname_to_ip(const char *host)
893 struct sockaddr_in inaddr;
894 struct hostent *hostp;
895 unsigned int dns_retries = 0;
896 #if defined(HAVE_GETHOSTBYNAME_R_6_ARGS) || defined(HAVE_GETHOSTBYNAME_R_5_ARGS) || defined(HAVE_GETHOSTBYNAME_R_3_ARGS)
897 struct hostent result;
898 #if defined(HAVE_GETHOSTBYNAME_R_6_ARGS) || defined(HAVE_GETHOSTBYNAME_R_5_ARGS)
899 char hbuf[HOSTENT_BUFFER_SIZE];
901 #else /* defined(HAVE_GETHOSTBYNAME_R_3_ARGS) */
902 struct hostent_data hdata;
903 #endif /* def HAVE_GETHOSTBYNAME_R_(6|5)_ARGS */
904 #endif /* def HAVE_GETHOSTBYNAME_R_(6|5|3)_ARGS */
906 if ((host == NULL) || (*host == '\0'))
911 memset((char *) &inaddr, 0, sizeof inaddr);
913 if ((inaddr.sin_addr.s_addr = inet_addr(host)) == -1)
915 #if defined(HAVE_GETHOSTBYNAME_R_6_ARGS)
916 while (gethostbyname_r(host, &result, hbuf,
917 HOSTENT_BUFFER_SIZE, &hostp, &thd_err)
918 && (thd_err == TRY_AGAIN) && (dns_retries++ < MAX_DNS_RETRIES))
920 log_error(LOG_LEVEL_ERROR,
921 "Timeout #%u while trying to resolve %s. Trying again.",
924 #elif defined(HAVE_GETHOSTBYNAME_R_5_ARGS)
925 while (NULL == (hostp = gethostbyname_r(host, &result,
926 hbuf, HOSTENT_BUFFER_SIZE, &thd_err))
927 && (thd_err == TRY_AGAIN) && (dns_retries++ < MAX_DNS_RETRIES))
929 log_error(LOG_LEVEL_ERROR,
930 "Timeout #%u while trying to resolve %s. Trying again.",
933 #elif defined(HAVE_GETHOSTBYNAME_R_3_ARGS)
935 * XXX: Doesn't retry in case of soft errors.
936 * Does this gethostbyname_r version set h_errno?
938 if (0 == gethostbyname_r(host, &result, &hdata))
946 #elif FEATURE_PTHREAD
947 privoxy_mutex_lock(&resolver_mutex);
948 while (NULL == (hostp = gethostbyname(host))
949 && (h_errno == TRY_AGAIN) && (dns_retries++ < MAX_DNS_RETRIES))
951 log_error(LOG_LEVEL_ERROR,
952 "Timeout #%u while trying to resolve %s. Trying again.",
955 privoxy_mutex_unlock(&resolver_mutex);
957 while (NULL == (hostp = gethostbyname(host))
958 && (h_errno == TRY_AGAIN) && (dns_retries++ < MAX_DNS_RETRIES))
960 log_error(LOG_LEVEL_ERROR,
961 "Timeout #%u while trying to resolve %s. Trying again.",
964 #endif /* def HAVE_GETHOSTBYNAME_R_(6|5|3)_ARGS */
966 * On Mac OSX, if a domain exists but doesn't have a type A
967 * record associated with it, the h_addr member of the struct
968 * hostent returned by gethostbyname is NULL, even if h_length
969 * is 4. Therefore the second test below.
971 if (hostp == NULL || hostp->h_addr == NULL)
974 log_error(LOG_LEVEL_ERROR, "could not resolve hostname %s", host);
977 if (hostp->h_addrtype != AF_INET)
980 errno = WSAEPROTOTYPE;
984 log_error(LOG_LEVEL_ERROR, "hostname %s resolves to unknown address type.", host);
988 (char *) &inaddr.sin_addr,
989 (char *) hostp->h_addr,
990 sizeof(inaddr.sin_addr)
993 return(inaddr.sin_addr.s_addr);