1 const char jbsockets_rcs[] = "$Id: jbsockets.c,v 1.46 2008/03/21 11:13:57 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 1.46 2008/03/21 11:13:57 fabiankeil
39 * Only gather host information if it's actually needed.
40 * Also move the code out of accept_connection() so it's less likely
41 * to delay other incoming connections if the host is misconfigured.
43 * Revision 1.45 2007/09/30 16:59:22 fabiankeil
44 * Set the maximum listen() backlog to 128. Apparently SOMAXCONN is
45 * neither high enough, nor a hard limit on mingw32. Again for BR#1795281.
47 * Revision 1.44 2007/09/15 13:01:31 fabiankeil
48 * Increase listen() backlog to SOMAXCONN (or 128) to decrease
49 * chances of dropped connections under load. Problem reported
50 * and fix suggested by nobody in BR#1795281.
52 * Revision 1.43 2007/06/01 18:16:36 fabiankeil
53 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
54 * deadlocks and crashes on OpenBSD and possibly other OS with neither
55 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
56 * Thanks to Ralf Horstmann for report and solution.
58 * Revision 1.42 2007/04/01 17:37:07 fabiankeil
59 * - Add DNS retries for Solaris and other systems
60 * whose gethostbyname_r version takes five arguments.
61 * - Move maximum number of DNS retries into a macro.
63 * Revision 1.41 2006/11/13 19:05:51 fabiankeil
64 * Make pthread mutex locking more generic. Instead of
65 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
66 * and use mutex locking unless there is an _r function
67 * available. Better safe than sorry.
69 * Fixes "./configure --disable-pthread" and should result
70 * in less threading-related problems on pthread-using platforms,
71 * but it still doesn't fix BR#1122404.
73 * Revision 1.40 2006/09/02 15:36:42 fabiankeil
74 * Follow the OpenBSD port's lead and protect the resolve
75 * functions on OpenBSD as well.
77 * Revision 1.39 2006/08/03 02:46:41 david__schmidt
78 * Incorporate Fabian Keil's patch work:
\rhttp://www.fabiankeil.de/sourcecode/privoxy/
80 * Revision 1.38 2006/07/18 14:48:46 david__schmidt
81 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
82 * with what was really the latest development (the v_3_0_branch branch)
84 * Revision 1.35.2.8 2006/01/21 16:16:08 david__schmidt
85 * Thanks to Edward Carrel for his patch to modernize OSX's
\rpthreads support. See bug #1409623.
87 * Revision 1.35.2.7 2005/05/07 21:50:55 david__schmidt
88 * A few memory leaks plugged (mostly on error paths)
90 * Revision 1.35.2.6 2003/12/17 16:34:40 oes
93 * Revision 1.35.2.5 2003/04/29 11:32:54 oes
94 * Don't rely on h_addr being non-NULL after gethostbyname.
95 * Works around an oddness in Max OSX and closes bug #724796
97 * Revision 1.35.2.4 2003/04/04 12:40:20 oes
98 * Made sure the errno set by bind, not close[socket] is used in
99 * bind_port. Probably fixes bugs #713777, #705562.
101 * Revision 1.35.2.3 2003/03/07 03:41:04 david__schmidt
102 * 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.
104 * Revision 1.35.2.2 2002/11/20 14:37:24 oes
105 * Fixed Win32 error logging in bind_port.
106 * Thanks to Oliver Stoeneberg for the hint.
108 * Revision 1.35.2.1 2002/05/26 23:41:27 joergs
109 * AmigaOS: Fixed wrong type of len in write_socket()
111 * Revision 1.35 2002/04/26 15:50:04 joergs
112 * AmigaOS: No socklen_t, added AMIGA to the systems using int instead.
114 * Revision 1.34 2002/04/08 20:31:41 swa
117 * Revision 1.33 2002/04/03 16:02:18 gliptak
118 * Correcting compile warning with older gcc
120 * Revision 1.32 2002/03/31 17:18:59 jongfoster
121 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
123 * Revision 1.31 2002/03/29 03:33:13 david__schmidt
124 * Fix Mac OSX compiler warnings
126 * Revision 1.30 2002/03/27 14:32:43 david__schmidt
127 * More compiler warning message maintenance
129 * Revision 1.29 2002/03/26 22:29:54 swa
130 * we have a new homepage!
132 * Revision 1.28 2002/03/24 13:25:43 swa
133 * name change related issues
135 * Revision 1.27 2002/03/13 00:27:05 jongfoster
138 * Revision 1.26 2002/03/11 22:07:02 david__schmidt
139 * OS/2 port maintenance:
140 * - Fixed EMX build - it had decayed a little
141 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
142 * substituted a memset for now.
144 * Revision 1.25 2002/03/09 20:03:52 jongfoster
145 * - Making various functions return int rather than size_t.
146 * (Undoing a recent change). Since size_t is unsigned on
147 * Windows, functions like read_socket that return -1 on
148 * error cannot return a size_t.
150 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
151 * crashes, and also frequently caused JB to jump to 100%
152 * CPU and stay there. (Because it thought it had just
153 * read ((unsigned)-1) == 4Gb of data...)
155 * - The signature of write_socket has changed, it now simply
156 * returns success=0/failure=nonzero.
158 * - Trying to get rid of a few warnings --with-debug on
159 * Windows, I've introduced a new type "jb_socket". This is
160 * used for the socket file descriptors. On Windows, this
161 * is SOCKET (a typedef for unsigned). Everywhere else, it's
162 * an int. The error value can't be -1 any more, so it's
163 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
164 * Windows it maps to the #define INVALID_SOCKET.)
166 * - The signature of bind_port has changed.
168 * Revision 1.24 2002/03/07 03:51:36 oes
169 * - Improved handling of failed DNS lookups
170 * - Fixed compiler warnings etc
172 * Revision 1.23 2002/03/05 00:36:01 jongfoster
173 * Fixing bug 514988 - unable to restart Junkbuster
175 * Revision 1.22 2002/03/04 02:08:02 david__schmidt
176 * Enable web editing of actions file on OS/2 (it had been broken all this time!)
178 * Revision 1.21 2002/01/09 14:32:33 oes
179 * Added support for gethostbyname_r and gethostbyaddr_r.
181 * Revision 1.20 2001/11/16 00:48:48 jongfoster
182 * Enabling duplicate-socket detection for all platforms, not
185 * Revision 1.19 2001/10/25 03:40:47 david__schmidt
186 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
187 * threads to call select() simultaneously. So, it's time to do a real, live,
188 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
189 * (native). Both versions will work, but using __OS2__ offers multi-threading.
191 * Revision 1.18 2001/09/21 23:02:02 david__schmidt
192 * Cleaning up 2 compiler warnings on OS/2.
194 * Revision 1.17 2001/09/13 20:11:46 jongfoster
195 * Fixing 2 compiler warnings under Win32
197 * Revision 1.16 2001/07/30 22:08:36 jongfoster
198 * Tidying up #defines:
199 * - All feature #defines are now of the form FEATURE_xxx
200 * - Permanently turned off WIN_GUI_EDIT
201 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
203 * Revision 1.15 2001/07/29 17:40:43 jongfoster
204 * Fixed compiler warning by adding a cast
206 * Revision 1.14 2001/07/18 13:47:59 oes
207 * Eliminated dirty hack for getsockbyname()
209 * Revision 1.13 2001/07/15 13:56:57 jongfoster
210 * Removing unused local variable.
212 * Revision 1.12 2001/07/01 17:04:11 oes
213 * Bugfix: accept_connection no longer uses the obsolete hstrerror() function
215 * Revision 1.11 2001/06/29 21:45:41 oes
216 * Indentation, CRLF->LF, Tab-> Space
218 * Revision 1.10 2001/06/29 13:29:15 oes
219 * - Added remote (server) host IP to csp->http->host_ip_addr_str
220 * - Added detection of local socket IP and fqdn
221 * - Removed logentry from cancelled commit
223 * Revision 1.9 2001/06/07 23:06:09 jongfoster
224 * The host parameter to connect_to() is now const.
226 * Revision 1.8 2001/06/03 19:12:07 oes
229 * Revision 1.7 2001/05/28 16:14:00 jongfoster
230 * Fixing bug in LOG_LEVEL_LOG
232 * Revision 1.6 2001/05/26 17:28:32 jongfoster
233 * Fixed LOG_LEVEL_LOG
235 * Revision 1.5 2001/05/26 15:26:15 jongfoster
236 * ACL feature now provides more security by immediately dropping
237 * connections from untrusted hosts.
239 * Revision 1.4 2001/05/26 00:37:42 jongfoster
240 * Cosmetic indentation correction.
242 * Revision 1.3 2001/05/25 21:57:54 jongfoster
243 * Now gives a warning under Windows if you try to bind
244 * it to a port that's already in use.
246 * Revision 1.2 2001/05/17 23:01:01 oes
247 * - Cleaned CRLF's from the sources and related files
249 * Revision 1.1.1.1 2001/05/15 13:58:54 oes
250 * Initial import of version 2.9.3 source tree
253 *********************************************************************/
263 #include <sys/types.h>
271 #include <sys/timeb.h>
279 #include <sys/time.h>
280 #include <netinet/in.h>
281 #include <sys/ioctl.h>
283 #include <sys/socket.h>
286 #include <netinet/tcp.h>
288 #include <arpa/inet.h>
294 #if defined(__EMX__) || defined (__OS2__)
295 #include <sys/select.h> /* OS/2/EMX needs a little help with select */
305 #ifdef FEATURE_PTHREAD
307 /* jcc.h is for mutex semaphores only */
308 #endif /* def FEATURE_PTHREAD */
310 #include "jbsockets.h"
314 const char jbsockets_h_rcs[] = JBSOCKETS_H_VERSION;
317 * Maximum number of gethostbyname(_r) retries in case of
318 * soft errors (TRY_AGAIN).
319 * XXX: Does it make sense to make this a config option?
321 #define MAX_DNS_RETRIES 10
323 #define MAX_LISTEN_BACKLOG 128
326 /*********************************************************************
328 * Function : connect_to
330 * Description : Open a socket and connect to it. Will check
331 * that this is allowed according to ACL.
334 * 1 : host = hostname to connect to
335 * 2 : portnum = port to connent on
336 * 3 : csp = Current client state (buffers, headers, etc...)
337 * Not modified, only used for source IP and ACL.
339 * Returns : JB_INVALID_SOCKET => failure, else it is the socket
342 *********************************************************************/
343 jb_socket connect_to(const char *host, int portnum, struct client_state *csp)
345 struct sockaddr_in inaddr;
349 struct timeval tv[1];
350 #if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA)
352 #endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
355 struct access_control_addr dst[1];
356 #endif /* def FEATURE_ACL */
358 memset((char *)&inaddr, 0, sizeof inaddr);
360 if ((addr = resolve_hostname_to_ip(host)) == INADDR_NONE)
362 csp->http->host_ip_addr_str = strdup("unknown");
363 return(JB_INVALID_SOCKET);
367 dst->addr = ntohl((unsigned long) addr);
370 if (block_acl(dst, csp))
377 return(JB_INVALID_SOCKET);
379 #endif /* def FEATURE_ACL */
381 inaddr.sin_addr.s_addr = addr;
382 inaddr.sin_family = AF_INET;
383 csp->http->host_ip_addr_str = strdup(inet_ntoa(inaddr.sin_addr));
386 if (sizeof(inaddr.sin_port) == sizeof(short))
387 #endif /* ndef _WIN32 */
389 inaddr.sin_port = htons((unsigned short) portnum);
394 inaddr.sin_port = htonl((unsigned long)portnum);
396 #endif /* ndef _WIN32 */
399 if ((fd = socket(inaddr.sin_family, SOCK_STREAM, 0)) == JB_INVALID_SOCKET)
401 if ((fd = socket(inaddr.sin_family, SOCK_STREAM, 0)) < 0)
404 return(JB_INVALID_SOCKET);
408 { /* turn off TCP coalescence */
410 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &mi, sizeof (int));
412 #endif /* def TCP_NODELAY */
414 #if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
415 if ((flags = fcntl(fd, F_GETFL, 0)) != -1)
418 fcntl(fd, F_SETFL, flags);
420 #endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) */
422 while (connect(fd, (struct sockaddr *) & inaddr, sizeof inaddr) == JB_INVALID_SOCKET)
425 if (errno == WSAEINPROGRESS)
427 if (sock_errno() == EINPROGRESS)
428 #else /* ifndef _WIN32 */
429 if (errno == EINPROGRESS)
430 #endif /* ndef _WIN32 || __OS2__ */
436 if (sock_errno() != EINTR)
442 return(JB_INVALID_SOCKET);
446 #if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
450 fcntl(fd, F_SETFL, flags);
452 #endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) */
454 /* wait for connection to complete */
461 /* MS Windows uses int, not SOCKET, for the 1st arg of select(). Wierd! */
462 if (select((int)fd + 1, NULL, &wfds, NULL, tv) <= 0)
465 return(JB_INVALID_SOCKET);
472 /*********************************************************************
474 * Function : write_socket
476 * Description : Write the contents of buf (for n bytes) to socket fd.
479 * 1 : fd = file descriptor (aka. handle) of socket to write to.
480 * 2 : buf = pointer to data to be written.
481 * 3 : len = length of data to be written to the socket "fd".
483 * Returns : 0 on success (entire buffer sent).
486 *********************************************************************/
488 int write_socket(jb_socket fd, const char *buf, ssize_t len)
490 int write_socket(jb_socket fd, const char *buf, size_t len)
498 if (len < 0) /* constant condition - size_t isn't ever negative */
503 log_error(LOG_LEVEL_LOG, "%N", len, buf);
506 return (send(fd, buf, (int)len, 0) != (int)len);
507 #elif defined(__BEOS__) || defined(AMIGA)
508 return (send(fd, buf, len, 0) != len);
509 #elif defined(__OS2__)
511 * Break the data up into SOCKET_SEND_MAX chunks for sending...
512 * OS/2 seemed to complain when the chunks were too large.
514 #define SOCKET_SEND_MAX 65000
516 int write_len = 0, send_len, send_rc = 0, i = 0;
517 while ((i < len) && (send_rc != -1))
519 if ((i + SOCKET_SEND_MAX) > len)
522 send_len = SOCKET_SEND_MAX;
523 send_rc = send(fd,(char*)buf + i, send_len, 0);
531 return (write(fd, buf, len) != len);
537 /*********************************************************************
539 * Function : read_socket
541 * Description : Read from a TCP/IP socket in a platform independent way.
544 * 1 : fd = file descriptor of the socket to read
545 * 2 : buf = pointer to buffer where data will be written
546 * Must be >= len bytes long.
547 * 3 : len = maximum number of bytes to read
549 * Returns : On success, the number of bytes read is returned (zero
550 * indicates end of file), and the file position is advanced
551 * by this number. It is not an error if this number is
552 * smaller than the number of bytes requested; this may hap-
553 * pen for example because fewer bytes are actually available
554 * right now (maybe because we were close to end-of-file, or
555 * because we are reading from a pipe, or from a terminal,
556 * or because read() was interrupted by a signal). On error,
557 * -1 is returned, and errno is set appropriately. In this
558 * case it is left unspecified whether the file position (if
561 *********************************************************************/
562 int read_socket(jb_socket fd, char *buf, int len)
570 return(recv(fd, buf, len, 0));
571 #elif defined(__BEOS__) || defined(AMIGA) || defined(__OS2__)
572 return(recv(fd, buf, (size_t)len, 0));
574 return(read(fd, buf, (size_t)len));
579 /*********************************************************************
581 * Function : close_socket
583 * Description : Closes a TCP/IP socket
586 * 1 : fd = file descriptor of socket to be closed
590 *********************************************************************/
591 void close_socket(jb_socket fd)
593 #if defined(_WIN32) || defined(__BEOS__)
597 #elif defined(__OS2__)
606 /*********************************************************************
608 * Function : bind_port
610 * Description : Call socket, set socket options, and listen.
611 * Called by listen_loop to "boot up" our proxy address.
614 * 1 : hostnam = TCP/IP address to bind/listen to
615 * 2 : portnum = port to listen on
616 * 3 : pfd = pointer used to return file descriptor.
618 * Returns : if success, returns 0 and sets *pfd.
619 * if failure, returns -3 if address is in use,
620 * -2 if address unresolvable,
622 *********************************************************************/
623 int bind_port(const char *hostnam, int portnum, jb_socket *pfd)
625 struct sockaddr_in inaddr;
629 #endif /* ndef _WIN32 */
631 *pfd = JB_INVALID_SOCKET;
633 memset((char *)&inaddr, '\0', sizeof inaddr);
635 inaddr.sin_family = AF_INET;
636 inaddr.sin_addr.s_addr = resolve_hostname_to_ip(hostnam);
638 if (inaddr.sin_addr.s_addr == INADDR_NONE)
644 if (sizeof(inaddr.sin_port) == sizeof(short))
645 #endif /* ndef _WIN32 */
647 inaddr.sin_port = htons((unsigned short) portnum);
652 inaddr.sin_port = htonl((unsigned long) portnum);
654 #endif /* ndef _WIN32 */
656 fd = socket(AF_INET, SOCK_STREAM, 0);
659 if (fd == JB_INVALID_SOCKET)
669 * This is not needed for Win32 - in fact, it stops
670 * duplicate instances of Privoxy from being caught.
672 * On UNIX, we assume the user is sensible enough not
673 * to start Privoxy multiple times on the same IP.
674 * Without this, stopping and restarting Privoxy
675 * from a script fails.
676 * Note: SO_REUSEADDR is meant to only take over
677 * sockets which are *not* in listen state in Linux,
678 * e.g. sockets in TIME_WAIT. YMMV.
680 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&one, sizeof(one));
681 #endif /* ndef _WIN32 */
683 if (bind(fd, (struct sockaddr *)&inaddr, sizeof(inaddr)) < 0)
686 errno = WSAGetLastError();
687 if (errno == WSAEADDRINUSE)
689 if (errno == EADDRINUSE)
702 while (listen(fd, MAX_LISTEN_BACKLOG) == -1)
716 /*********************************************************************
718 * Function : get_host_information
720 * Description : Determines the IP address the client used to
721 * reach us and the hostname associated with it.
723 * XXX: Most of the code has been copy and pasted
724 * from accept_connection() and not all of the
725 * ifdefs paths have been tested afterwards.
728 * 1 : afd = File descriptor returned from accept().
729 * 2 : ip_address = Pointer to return the pointer to
730 * the ip address string.
731 * 3 : hostname = Pointer to return the pointer to
732 * the hostname or NULL if the caller
733 * isn't interested in it.
737 *********************************************************************/
738 void get_host_information(jb_socket afd, char **ip_address, char **hostname)
740 struct sockaddr_in server;
741 struct hostent *host = NULL;
742 #if defined(_WIN32) || defined(__OS2__) || defined(__APPLE_CC__) || defined(AMIGA)
743 /* according to accept_connection() this fixes a warning. */
748 #if defined(HAVE_GETHOSTBYADDR_R_8_ARGS) || defined(HAVE_GETHOSTBYADDR_R_7_ARGS) || defined(HAVE_GETHOSTBYADDR_R_5_ARGS)
749 struct hostent result;
750 #if defined(HAVE_GETHOSTBYADDR_R_5_ARGS)
751 struct hostent_data hdata;
753 char hbuf[HOSTENT_BUFFER_SIZE];
755 #endif /* def HAVE_GETHOSTBYADDR_R_5_ARGS */
756 #endif /* def HAVE_GETHOSTBYADDR_R_(8|7|5)_ARGS */
757 s_length = sizeof(server);
759 if (NULL != hostname)
765 if (!getsockname(afd, (struct sockaddr *) &server, &s_length))
767 *ip_address = strdup(inet_ntoa(server.sin_addr));
769 if (NULL == hostname)
772 * We're done here, the caller isn't
773 * interested in knowing the hostname.
777 #if defined(HAVE_GETHOSTBYADDR_R_8_ARGS)
778 gethostbyaddr_r((const char *)&server.sin_addr,
779 sizeof(server.sin_addr), AF_INET,
780 &result, hbuf, HOSTENT_BUFFER_SIZE,
782 #elif defined(HAVE_GETHOSTBYADDR_R_7_ARGS)
783 host = gethostbyaddr_r((const char *)&server.sin_addr,
784 sizeof(server.sin_addr), AF_INET,
785 &result, hbuf, HOSTENT_BUFFER_SIZE, &thd_err);
786 #elif defined(HAVE_GETHOSTBYADDR_R_5_ARGS)
787 if (0 == gethostbyaddr_r((const char *)&server.sin_addr,
788 sizeof(server.sin_addr), AF_INET,
797 #elif FEATURE_PTHREAD
798 pthread_mutex_lock(&resolver_mutex);
799 host = gethostbyaddr((const char *)&server.sin_addr,
800 sizeof(server.sin_addr), AF_INET);
801 pthread_mutex_unlock(&resolver_mutex);
803 host = gethostbyaddr((const char *)&server.sin_addr,
804 sizeof(server.sin_addr), AF_INET);
808 log_error(LOG_LEVEL_ERROR, "Unable to get my own hostname: %E\n");
812 *hostname = strdup(host->h_name);
820 /*********************************************************************
822 * Function : accept_connection
824 * Description : Accepts a connection on a socket. Socket must have
825 * been created using bind_port().
828 * 1 : csp = Client state, cfd, ip_addr_str, and
829 * ip_addr_long will be set by this routine.
830 * 2 : fd = file descriptor returned from bind_port
832 * Returns : when a connection is accepted, it returns 1 (TRUE).
833 * On an error it returns 0 (FALSE).
835 *********************************************************************/
836 int accept_connection(struct client_state * csp, jb_socket fd)
838 struct sockaddr_in client;
840 #if defined(_WIN32) || defined(__OS2__) || defined(__APPLE_CC__) || defined(AMIGA)
841 /* Wierdness - fix a warning. */
847 c_length = sizeof(client);
850 afd = accept (fd, (struct sockaddr *) &client, &c_length);
851 if (afd == JB_INVALID_SOCKET)
858 afd = accept (fd, (struct sockaddr *) &client, &c_length);
859 } while (afd < 1 && errno == EINTR);
867 csp->ip_addr_str = strdup(inet_ntoa(client.sin_addr));
868 csp->ip_addr_long = ntohl(client.sin_addr.s_addr);
875 /*********************************************************************
877 * Function : resolve_hostname_to_ip
879 * Description : Resolve a hostname to an internet tcp/ip address.
880 * NULL or an empty string resolve to INADDR_ANY.
883 * 1 : host = hostname to resolve
885 * Returns : INADDR_NONE => failure, INADDR_ANY or tcp/ip address if succesful.
887 *********************************************************************/
888 unsigned long resolve_hostname_to_ip(const char *host)
890 struct sockaddr_in inaddr;
891 struct hostent *hostp;
892 unsigned int dns_retries = 0;
893 #if defined(HAVE_GETHOSTBYNAME_R_6_ARGS) || defined(HAVE_GETHOSTBYNAME_R_5_ARGS) || defined(HAVE_GETHOSTBYNAME_R_3_ARGS)
894 struct hostent result;
895 #if defined(HAVE_GETHOSTBYNAME_R_6_ARGS) || defined(HAVE_GETHOSTBYNAME_R_5_ARGS)
896 char hbuf[HOSTENT_BUFFER_SIZE];
898 #else /* defined(HAVE_GETHOSTBYNAME_R_3_ARGS) */
899 struct hostent_data hdata;
900 #endif /* def HAVE_GETHOSTBYNAME_R_(6|5)_ARGS */
901 #endif /* def HAVE_GETHOSTBYNAME_R_(6|5|3)_ARGS */
903 if ((host == NULL) || (*host == '\0'))
908 memset((char *) &inaddr, 0, sizeof inaddr);
910 if ((inaddr.sin_addr.s_addr = inet_addr(host)) == -1)
912 #if defined(HAVE_GETHOSTBYNAME_R_6_ARGS)
913 while (gethostbyname_r(host, &result, hbuf,
914 HOSTENT_BUFFER_SIZE, &hostp, &thd_err)
915 && (thd_err == TRY_AGAIN) && (dns_retries++ < MAX_DNS_RETRIES))
917 log_error(LOG_LEVEL_ERROR,
918 "Timeout #%u while trying to resolve %s. Trying again.",
921 #elif defined(HAVE_GETHOSTBYNAME_R_5_ARGS)
922 while (NULL == (hostp = gethostbyname_r(host, &result,
923 hbuf, HOSTENT_BUFFER_SIZE, &thd_err))
924 && (thd_err == TRY_AGAIN) && (dns_retries++ < MAX_DNS_RETRIES))
926 log_error(LOG_LEVEL_ERROR,
927 "Timeout #%u while trying to resolve %s. Trying again.",
930 #elif defined(HAVE_GETHOSTBYNAME_R_3_ARGS)
932 * XXX: Doesn't retry in case of soft errors.
933 * Does this gethostbyname_r version set h_errno?
935 if (0 == gethostbyname_r(host, &result, &hdata))
943 #elif FEATURE_PTHREAD
944 pthread_mutex_lock(&resolver_mutex);
945 while (NULL == (hostp = gethostbyname(host))
946 && (h_errno == TRY_AGAIN) && (dns_retries++ < MAX_DNS_RETRIES))
948 log_error(LOG_LEVEL_ERROR,
949 "Timeout #%u while trying to resolve %s. Trying again.",
952 pthread_mutex_unlock(&resolver_mutex);
954 while (NULL == (hostp = gethostbyname(host))
955 && (h_errno == TRY_AGAIN) && (dns_retries++ < MAX_DNS_RETRIES))
957 log_error(LOG_LEVEL_ERROR,
958 "Timeout #%u while trying to resolve %s. Trying again.",
961 #endif /* def HAVE_GETHOSTBYNAME_R_(6|5|3)_ARGS */
963 * On Mac OSX, if a domain exists but doesn't have a type A
964 * record associated with it, the h_addr member of the struct
965 * hostent returned by gethostbyname is NULL, even if h_length
966 * is 4. Therefore the second test below.
968 if (hostp == NULL || hostp->h_addr == NULL)
971 log_error(LOG_LEVEL_ERROR, "could not resolve hostname %s", host);
974 if (hostp->h_addrtype != AF_INET)
977 errno = WSAEPROTOTYPE;
981 log_error(LOG_LEVEL_ERROR, "hostname %s resolves to unknown address type.", host);
985 (char *) &inaddr.sin_addr,
986 (char *) hostp->h_addr,
987 sizeof(inaddr.sin_addr)
990 return(inaddr.sin_addr.s_addr);