sockets.cxx

pwlib源码库

/*
 * sockets.cxx
 *
 * Berkley sockets classes.
 *
 * Portable Windows Library
 *
 * Copyright (c) 1993-1998 Equivalence Pty. Ltd.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is Portable Windows Library.
 *
 * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
 *
 * Portions are Copyright (C) 1993 Free Software Foundation, Inc.
 * All Rights Reserved.
 *
 * Contributor(s): ______________________________________.
 *
 * $Log: sockets.cxx,v $
 * Revision 1.194  2005/08/18 06:24:30  shorne
 * Reversed Last Patch
 *
 * Revision 1.193  2005/08/18 03:42:53  shorne
 * Chaeck for RSVP QoS Thx Zdenek
 *
 * Revision 1.192  2005/08/09 12:46:00  rjongbloed
 * Fixed some platforms where in6addr_any does not exist.
 *
 * Revision 1.191  2005/07/17 09:25:40  csoutheren
 * Fixed problem in IPV6 variant of PIPSocket::Address::IsLoopback
 * Thanks to Roger Hardiman
 *
 * Revision 1.190  2005/07/13 12:08:09  csoutheren
 * Fixed QoS patches to be more consistent with PWLib style and to allow Unix compatibility
 *
 * Revision 1.189  2005/07/13 11:48:54  csoutheren
 * Backported QOS changes from isvo branch
 *
 * Revision 1.188  2005/06/21 22:28:32  rjongbloed
 * Assured IP is set to zero, so if parse of dotted decimal fails is not random IP address.
 *
 * Revision 1.187.2.1  2005/04/25 13:42:28  shorne
 * Extended QoS support for per-call negotiation
 *
 * Revision 1.187  2005/03/22 07:29:30  csoutheren
 * Fixed problem where PStrings sometimes get case into
 * PIPSocket::Address when outputting to an ostream
 *
 * Revision 1.186  2005/02/13 23:01:36  csoutheren
 * Fixed problem with not detecting mapped IPV6 addresses within the RFC1918
 * address range as RFC1918
 *
 * Revision 1.185  2005/02/07 12:12:30  csoutheren
 * Expanded interface list routines to include IPV6 addresses
 * Added IPV6 to GetLocalAddress
 *
 * Revision 1.184  2005/02/07 00:47:18  csoutheren
 * Changed IPV6 code to use standard IPV6 macros
 *
 * Revision 1.183  2005/01/26 05:38:01  csoutheren
 * Added ability to remove config file support
 *
 * Revision 1.182  2005/01/16 21:27:07  csoutheren
 * Changed PIPSocket::IsAny to be const
 *
 * Revision 1.181  2005/01/16 20:35:41  csoutheren
 * Fixed problem with IPv6 INADDR_ANY
 *
 * Revision 1.180  2005/01/15 19:23:39  csoutheren
 * Fixed problem in operator *= for IP V6
 *
 * Revision 1.179  2004/12/14 14:24:20  csoutheren
 * Added PIPSocket::Address::operator*= to compare IPV4 addresses
 * to IPV4-compatible IPV6 addresses. More documentation needed
 * once this is tested as working
 *
 * Revision 1.178  2004/12/14 06:20:29  csoutheren
 * Added function to get address of network interface
 *
 * Revision 1.177  2004/11/16 00:31:44  csoutheren
 * Added Cygwin support (needs to have gethostbyname_r fixed)
 *
 * Revision 1.176  2004/10/26 18:27:28  ykiryanov
 * Added another for of SetOption to set SO_REUSEADDR for BeOS
 *
 * Revision 1.175  2004/08/24 07:08:11  csoutheren
 * Added use of recvmsg to determine which interface UDP packets arrive on
 *
 * Revision 1.174  2004/07/11 07:56:36  csoutheren
 * Applied jumbo VxWorks patch, thanks to Eize Slange
 *
 * Revision 1.173  2004/04/27 04:37:51  rjongbloed
 * Fixed ability to break of a PSocket::Select call under linux when a socket
 *   is closed by another thread.
 *
 * Revision 1.172  2004/04/22 12:27:24  rjongbloed
 * Fixed selection of QoS to use more flexible #if rather than #ifdef
 *
 * Revision 1.171  2004/04/18 04:33:38  rjongbloed
 * Changed all operators that return BOOL to return standard type bool. This is primarily
 *   for improved compatibility with std STL usage removing many warnings.
 *
 * Revision 1.170  2004/04/18 00:50:14  ykiryanov
 * Removed BE_BONELESS ifdefs. Be is boned now. More funcitonality
 *
 * Revision 1.169  2004/04/03 08:22:22  csoutheren
 * Remove pseudo-RTTI and replaced with real RTTI
 *
 * Revision 1.168  2004/02/04 02:32:31  csoutheren
 * Changed #ifdef to #if to ensure flags are tested correctly
 *
 * Revision 1.167  2004/01/23 07:07:35  csoutheren
 * Fixed compile warning under Linux
 *
 * Revision 1.166  2003/11/12 05:16:48  csoutheren
 * Fixed compiling problem on systems without QoS or IPV6
 *
 * Revision 1.165  2003/10/30 11:32:57  rjongbloed
 * Added bullet proofing for converting from inaddr
 *
 * Revision 1.164  2003/10/27 09:48:47  csoutheren
 * Changed use of P_HAS_QOS to ensure that setsockopt is still used
 * for diffserv if available. Thanks to Henry Harrison
 *
 * Revision 1.163  2003/10/27 03:46:15  csoutheren
 * Added ifdef to disable QoS code on systems that do not support it
 *
 * Revision 1.162  2003/10/27 03:22:44  csoutheren
 * Added handling for QoS
 *   Thanks to Henry Harrison of AliceStreet
 *
 * Revision 1.161  2003/05/27 08:53:11  dsandras
 *
 * Added test error case when the host lookup fails for IPv6.
 *
 * Revision 1.160  2003/05/21 09:34:44  rjongbloed
 * Name lookup support for IPv6, thanks again S閎astien Josset
 *
 * Revision 1.159  2003/04/28 02:55:50  robertj
 * Added function to see at run time if IPv6 available, thanks Sebastien Josset
 *
 * Revision 1.158  2003/04/15 07:40:08  robertj
 * Removed redundent variable.
 * Fixed IPv6 support for multiple IP address DNS lookups.
 *
 * Revision 1.157  2003/04/08 01:12:35  robertj
 * Latest patch for IPv6 operation, thanks Sebastien Josset
 *
 * Revision 1.156  2003/04/07 23:31:33  robertj
 * Fixed incorrect host to network byte order function, should be long!
 *
 * Revision 1.155  2003/04/07 23:22:08  robertj
 * Fixed GNU compatibility issue.
 *
 * Revision 1.154  2003/04/07 11:57:56  robertj
 * Allowed for full integer numeric form of IP address read from a stream.
 *
 * Revision 1.153  2003/04/03 08:43:23  robertj
 * Added IPv4 mapping into IPv6, thanks Sebastien Josset
 *
 * Revision 1.152  2003/03/26 05:36:38  robertj
 * More IPv6 support (INADDR_ANY handling), thanks S閎astien Josset
 *
 * Revision 1.151  2003/02/11 06:49:12  craigs
 * Added missing OpenSocket function
 *
 * Revision 1.150  2003/02/03 11:23:32  robertj
 * Added function to get pointer to IP address data.
 *
 * Revision 1.149  2003/02/03 10:27:55  robertj
 * Cleaned up the gethostbyX functions for various platforms
 *
 * Revision 1.148  2003/02/03 08:43:01  robertj
 * Fixed correct scoping of local variables in gethostbyX functions.
 *
 * Revision 1.147  2003/01/14 04:36:08  robertj
 * Fixed v6 conversion of numeric string to binary so does not internally
 *   doa DNS lookup, confuses other parts of the system.
 *
 * Revision 1.146  2003/01/11 05:10:51  robertj
 * Fixed Win CE compatibility issues, thanks Joerg Schoemer
 *
 * Revision 1.145  2002/12/16 08:04:46  robertj
 * Fixed correct error check for gethostbyname_r, thanks Vladimir Toncar
 *
 * Revision 1.144  2002/12/13 04:01:46  robertj
 * Initialised error code in gethostbyname usage.
 *
 * Revision 1.143  2002/12/04 00:52:59  robertj
 * Fixed GNU warning
 *
 * Revision 1.142  2002/12/02 12:25:08  craigs
 * Fixed problem with error code from gethostbyname_r not being checked correctly
 *
 * Revision 1.141  2002/11/24 23:47:01  robertj
 * Fixed MSVC v5 compatibility
 *
 * Revision 1.140  2002/11/13 02:15:25  craigs
 * Fixed problem with GetLocalHostName
 *
 * Revision 1.139  2002/11/12 11:47:53  rogerh
 * Add a missing memset in the Psockaddr constructor
 *
 * Revision 1.138  2002/11/02 00:32:21  robertj
 * Further fixes to VxWorks (Tornado) port, thanks Andreas Sikkema.
 *
 * Revision 1.137  2002/11/01 23:56:11  robertj
 * Fixed GNu compatibility isse with IPv6
 *
 * Revision 1.136  2002/11/01 03:32:08  robertj
 * More IPv6 fixes, thanks S閎astien Josset.
 *
 * Revision 1.135  2002/10/31 07:55:33  robertj
 * Put sizeof ipv6 structure back as magic number 28 is explained by
 *   mismatched header file and running implementation.
 *
 * Revision 1.134  2002/10/29 08:04:44  robertj
 * Changed in_addr6 to more universally used in6_addr.
 * Changed size of ipv6 address to be 28 under win32, Why? I don't know!
 *
 * Revision 1.133  2002/10/19 06:12:20  robertj
 * Moved P_fd_set::Zero() from platform independent to platform dependent
 *   code as Win32 implementation is completely different from Unix.
 *
 * Revision 1.132  2002/10/18 08:07:41  robertj
 * Fixed use of FD_ZERO as (strangely) crashes on some paltforms and would
 *   not have cleared enough of an enlarges fd_set anyway.
 *
 * Revision 1.131  2002/10/17 13:44:27  robertj
 * Port to RTEMS, thanks Vladimir Nesic.
 *
 * Revision 1.130  2002/10/17 08:17:28  robertj
 * Fixed incomplete changes for expandable fd_set
 *
 * Revision 1.129  2002/10/17 07:17:43  robertj
 * Added ability to increase maximum file handles on a process.
 *
 * Revision 1.128  2002/10/17 01:24:11  robertj
 * Fixed so internal sockaddr classes GetSize() returns correct size for
 *   particular sockaddr it represents, thanks S閎astien Josset.
 *
 * Revision 1.127  2002/10/16 06:19:36  robertj
 * Rewrite of IPv6 sockaddr code to use intelligent class to automatically
 *   know if it is sockaddr_in or aockaddr_in6.
 * Fixed Connect() function to work correctly on unopened socket.
 *
 * Revision 1.126  2002/10/10 11:38:56  robertj
 * Added close of socket if not open in correct ip version, thanks S閎astien Josset
 *
 * Revision 1.125  2002/10/10 04:43:44  robertj
 * VxWorks port, thanks Martijn Roest
 *
 * Revision 1.124  2002/10/09 05:37:52  robertj
 * Fixed IPv6 version of ReadFrom() and WriteTo().
 *
 * Revision 1.123  2002/10/08 23:31:44  robertj
 * Added missing GetSize() implementation in ip address.
 *
 * Revision 1.122  2002/10/08 12:41:52  robertj
 * Changed for IPv6 support, thanks S閎astien Josset.
 *
 * Revision 1.121  2002/09/23 07:17:24  robertj
 * Changes to allow winsock2 to be included.
 *
 * Revision 1.120  2002/05/22 07:18:46  robertj
 * Fixed bug where SO_RESUSEADDR wsa being turned ON instead of OFF when
 *   making an outgoing connection, should only be ON for listener sockets.
 *
 * Revision 1.119  2002/04/12 01:42:41  robertj
 * Changed return value on os_connect() and os_accept() to make sure
 *   get the correct error codes propagated up under unix.
 *
 * Revision 1.118  2002/01/28 01:27:03  robertj
 * Removed previous change that actually has nothing to do with GCC 3 compatibility,
 *   setting default timeout for all sockets to 10 seconds is NOT a sensible thing to do!
 *
 * Revision 1.117  2002/01/26 23:57:45  craigs
 * Changed for GCC 3.0 compatibility, thanks to [e-mail]
 *
 * Revision 1.116  2002/01/07 05:37:32  robertj
 * Changed to allow for a service name that starts with a number.
 *
 * Revision 1.115  2002/01/02 04:55:31  craigs
 * Fixed problem when PSocket::GetPortByService called with a number
 * that is a substring of a valid service name
 *
 * Revision 1.114  2001/12/13 09:18:07  robertj
 * Added function to convert PString to IP address with error checking that can
 *   distinguish between 0.0.0.0 or 255.255.255.255 and illegal address.
 * Added ability to decode bracketed IP addresss [10.1.2.3] as host name.
 *
 * Revision 1.113  2001/09/14 08:00:38  robertj
 * Added new versions of Conenct() to allow binding to a specific local interface.
 *
 * Revision 1.112  2001/09/10 02:51:23  robertj
 * Major change to fix problem with error codes being corrupted in a
 *   PChannel when have simultaneous reads and writes in threads.
 *
 * Revision 1.111  2001/06/30 06:59:07  yurik
 * Jac Goudsmit from Be submit these changes 6/28. Implemented by Yuri Kiryanov
 *
 * Revision 1.110  2001/05/24 02:07:31  yurik
 * ::setsockopt on WinCE is now not called if option is not supported
 *
 * Revision 1.109  2001/05/23 19:48:55  yurik
 * Fix submitted by Dave Cassel, [e-mail],
 * allowing a connection between a client and a gatekeeper.
 *
 * Revision 1.108  2001/03/20 06:44:25  robertj
 * Lots of changes to fix the problems with terminating threads that are I/O
 *   blocked, especially when doing orderly shutdown of service via SIGTERM.
 *
 * Revision 1.107  2001/03/05 04:18:27  robertj
 * Added net mask to interface info returned by GetInterfaceTable()
 *
 * Revision 1.106  2001/01/29 06:41:32  robertj
 * Added printing of entry of interface table.
 *
 * Revision 1.105  2001/01/28 01:15:01  yurik
 * WinCE port-related
 *
 * Revision 1.104  2001/01/24 06:32:17  yurik
 * Windows CE port-related changes
 *
 * Revision 1.103  2000/06/26 11:17:21  robertj
 * Nucleus++ port (incomplete).
 *
 * Revision 1.102  2000/06/21 01:01:22  robertj
 * AIX port, thanks Wolfgang Platzer ([e-mail]).
 *
 * Revision 1.101  2000/05/02 08:14:40  craigs
 * Fixed problem with "memory leak" reporting under Unix
 *
 * Revision 1.100  2000/04/27 02:43:45  robertj
 * Fixed warning about signedness mismatch.
 *
 * Revision 1.99  2000/04/19 00:13:52  robertj
 * BeOS port changes.
 *
 * Revision 1.98  2000/02/18 09:55:21  robertj
 * Added parameter so get/setsockopt can have other levels to SOL_SOCKET.
 *
 * Revision 1.97  1999/10/27 01:21:44  robertj
 * Improved portability of copy from host_info struct to IP address.
 *
 * Revision 1.96  1999/08/30 02:21:03  robertj
 * Added ability to listen to specific interfaces for IP sockets.
 *
 * Revision 1.95  1999/08/27 08:18:52  robertj
 * Added ability to get the host/port of the the last packet read/written to UDP socket.
 *
 * Revision 1.94  1999/08/08 09:04:01  robertj
 * Added operator>> for PIPSocket::Address class.
 *
 * Revision 1.93  1999/07/11 13:42:13  craigs
 * pthreads support for Linux
 *
 * Revision 1.92  1999/06/01 08:04:35  robertj
 * Fixed mistake from previous fix.
 *
 * Revision 1.91  1999/06/01 07:39:23  robertj
 * Added retries to DNS lookup if get temporary error.
 *
 * Revision 1.90  1999/03/09 08:13:52  robertj
 * Fixed race condition in doing Select() on closed sockets. Could go into infinite wait.
 *
 * Revision 1.89  1999/03/02 05:41:58  robertj
 * More BeOS changes
 *
 * Revision 1.88  1999/02/26 04:10:39  robertj
 * More BeOS port changes
 *
 * Revision 1.87  1999/02/25 03:43:35  robertj
 * Fixed warning when PINDEX is unsigned.
 *
 * Revision 1.86  1999/02/23 07:19:22  robertj
 * Added [] operator PIPSocket::Address to get the bytes out of an IP address.
 *
 * Revision 1.85  1999/02/16 08:08:06  robertj
 * MSVC 6.0 compatibility changes.
 *
 * Revision 1.84  1999/01/08 01:29:47  robertj
 * Support for pthreads under FreeBSD
 *
 * Revision 1.83  1999/01/06 10:58:01  robertj
 * Fixed subtle mutex bug in returning string hostname from DNS cache.
 *
 * Revision 1.82  1998/12/22 10:25:01  robertj
 * Added clone() function to support SOCKS in FTP style protocols.
 * Fixed internal use of new operator in IP cache.
 *
 * Revision 1.81  1998/12/18 04:34:37  robertj
 * PPC Linux GNU C compatibility.
 *
 * Revision 1.80  1998/11/30 04:47:52  robertj
 * New directory structure
 *
 * Revision 1.79  1998/11/14 06:28:36  robertj
 * Changed senatics of os_sendto to return TRUE if ANY bytes are sent.
 *
 * Revision 1.78  1998/11/08 12:05:04  robertj
 * Fixed multiple thread access problem with DNS aliases array.
 *
 * Revision 1.77  1998/10/01 09:05:35  robertj
 * Added check that port number is between 1 and 65535.
 *
 * Revision 1.76  1998/09/23 06:22:44  robertj
 * Added open source copyright license.
 *
 * Revision 1.75  1998/08/31 13:00:34  robertj
 * Prevented dependency on snmpapi.dll for all ptlib apps.
 *
 * Revision 1.74  1998/08/27 00:58:42  robertj
 * Resolved signedness problems with various GNU libraries.
 *
 * Revision 1.73  1998/08/25 14:07:43  robertj
 * Added getprotobyxxx wrapper functions.
 *
 * Revision 1.72  1998/08/25 11:09:20  robertj
 * Fixed parsing of 802.x header on ethernet frames.
 * Changed DNS cache to not cache temporary lookup failures, only an authoratative 'no such host'.
 *
 * Revision 1.71  1998/08/21 05:26:10  robertj
 * Fixed bug where write streams out to non-stream socket.
 * Added ethernet socket.
 *
 * Revision 1.70  1998/05/07 05:20:25  robertj
 * Fixed DNS lookup so only works around bug in old Win95 and not OSR2
 *
 * Revision 1.69  1998/03/20 03:18:21  robertj
 * Added special classes for specific sepahores, PMutex and PSyncPoint.
 *
 * Revision 1.68  1998/03/05 12:45:48  robertj
 * DNS cache and NT bug fix attempts.
 *
 * Revision 1.67  1998/01/26 02:49:22  robertj
 * GNU support.
 *
 * Revision 1.66  1998/01/26 00:49:28  robertj
 * Fixed bug in detecting local host on NT, 95 bug kludge was interfering with it.
 *
 * Revision 1.65  1998/01/06 12:43:23  craigs
 * Added definition of REENTRANT_BUFFER_LEN
 *
 * Revision 1.64  1998/01/04 07:25:09  robertj
 * Added pthreads compatible calls for gethostbyx functions.
 *
 * Revision 1.63  1997/12/18 05:06:13  robertj
 * Moved IsLocalHost() to platform dependent code.
 *
 * Revision 1.62  1997/12/11 10:30:35  robertj
 * Added operators for IP address to DWORD conversions.
 *
 * Revision 1.61  1997/10/03 13:33:22  robertj
 * Added workaround for NT winsock bug with RAS and DNS lookups.
 *
 * Revision 1.60  1997/09/27 00:58:39  robertj
 * Fixed race condition on socket close in Select() function.
 *
 * Revision 1.59  1997/06/06 10:56:36  craigs
 * Added new functions for connectionless UDP writes
 *
 * Revision 1.58  1997/01/04 07:42:18  robertj
 * Fixed GCC Warnings.
 *
 * Revision 1.57  1997/01/04 06:54:38  robertj
 * Added missing canonical name to alias list.
 *
 * Revision 1.56  1996/12/17 11:07:05  robertj
 * Added clear of name cache.
 *
 * Revision 1.55  1996/12/12 09:23:27  robertj
 * Fixed name cache to cache missing names as well.
 * Fixed new connect with specific local port so can be re-used (simultaneous FTP session bug)
 *
 * Revision 1.54  1996/12/05 11:46:39  craigs
 * Fixed problem with Win95 recvfrom not having timeouts
 *
 * Revision 1.53  1996/11/30 12:08:17  robertj
 * Added Connect() variant so can set the local port number on link.
 *
 * Revision 1.52  1996/11/16 10:49:03  robertj
 * Fixed missing const in PIPSocket::Address stream output operator..
 *
 * Revision 1.51  1996/11/16 01:43:49  craigs
 * Fixed problem with ambiguous DNS cache keys
 *
 * Revision 1.50  1996/11/10 21:08:31  robertj
 * Added host name caching.
 *
 * Revision 1.49  1996/11/04 03:40:22  robertj
 * Moved address printer from inline to source.
 *
 * Revision 1.48  1996/10/26 01:41:09  robertj
 * Compensated for Win'95 gethostbyaddr bug.
 *
 * Revision 1.47  1996/09/14 13:09:40  robertj
 * Major upgrade:
 *   rearranged sockets to help support IPX.
 *   added indirect channel class and moved all protocols to descend from it,
 *   separating the protocol from the low level byte transport.
 *
 * Revision 1.46  1996/08/25 09:33:32  robertj
 * Added function to detect "local" host name.
 *
 * Revision 1.45  1996/07/30 12:24:53  robertj
 * Fixed incorrect conditional stopping Select() from working.
 *
 * Revision 1.44  1996/07/27 04:10:35  robertj