mDNSPosix/mDNSPosix.h

   1 /* -*- Mode: C; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2002-2004 Apple Computer, Inc. All rights reserved.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16
  17     Change History (most recent first):
  18
  19 $Log: mDNSPosix.h,v $
  20 Revision 1.18  2006/08/14 23:24:47  cheshire
  21 Re-licensed mDNSResponder daemon source code under Apache License, Version 2.0
  22
  23 Revision 1.17  2005/02/04 00:39:59  cheshire
  24 Move ParseDNSServers() from PosixDaemon.c to mDNSPosix.c so all Posix client layers can use it
  25
  26 Revision 1.16  2004/11/30 22:37:01  cheshire
  27 Update copyright dates and add "Mode: C; tab-width: 4" headers
  28
  29 Revision 1.15  2004/02/06 01:19:51  cheshire
  30 Conditionally exclude IPv6 code unless HAVE_IPV6 is set
  31
  32 Revision 1.14  2004/01/28 21:12:15  cheshire
  33 Reconcile mDNSIPv6Support & HAVE_IPV6 into a single flag (HAVE_IPV6)
  34
  35 Revision 1.13  2004/01/24 05:12:03  cheshire
  36 <rdar://problem/3534352>: Need separate socket for issuing unicast queries
  37
  38 Revision 1.12  2004/01/23 21:37:08  cheshire
  39 For consistency, rename multicastSocket to multicastSocket4, and multicastSocketv6 to multicastSocket6
  40
  41 Revision 1.11  2003/12/11 03:03:51  rpantos
  42 Clean up mDNSPosix so that it builds on OS X again.
  43
  44 Revision 1.10  2003/12/08 20:47:02  rpantos
  45 Add support for mDNSResponder on Linux.
  46
  47 Revision 1.9  2003/10/30 19:25:19  cheshire
  48 Fix warning on certain compilers
  49
  50 Revision 1.8  2003/08/12 19:56:26  cheshire
  51 Update to APSL 2.0
  52
  53 Revision 1.7  2003/07/02 21:19:59  cheshire
  54 <rdar://problem/3313413> Update copyright notices, etc., in source code comments
  55
  56 Revision 1.6  2003/03/13 03:46:21  cheshire
  57 Fixes to make the code build on Linux
  58
  59 Revision 1.5  2003/03/08 00:35:56  cheshire
  60 Switched to using new "mDNS_Execute" model (see "mDNSCore/Implementer Notes.txt")
  61
  62 Revision 1.4  2002/12/23 22:13:31  jgraessl
  63
  64 Reviewed by: Stuart Cheshire
  65 Initial IPv6 support for mDNSResponder.
  66
  67 Revision 1.3  2002/09/21 20:44:53  zarzycki
  68 Added APSL info
  69
  70 Revision 1.2  2002/09/19 04:20:44  cheshire
  71 Remove high-ascii characters that confuse some systems
  72
  73 Revision 1.1  2002/09/17 06:24:34  cheshire
  74 First checkin
  75
  76 */
  77
  78 #ifndef __mDNSPlatformPosix_h
  79 #define __mDNSPlatformPosix_h
  80
  81 #include <signal.h>
  82 #include <sys/time.h>
  83
  84 #ifdef  __cplusplus
  85     extern "C" {
  86 #endif
  87
  88 // PosixNetworkInterface is a record extension of the core NetworkInterfaceInfo
  89 // type that supports extra fields needed by the Posix platform.
  90 //
  91 // IMPORTANT: coreIntf must be the first field in the structure because
  92 // we cast between pointers to the two different types regularly.
  93
  94 typedef struct PosixNetworkInterface PosixNetworkInterface;
  95
  96 struct PosixNetworkInterface
  97         {
  98         NetworkInterfaceInfo    coreIntf;
  99         const char *            intfName;
 100         PosixNetworkInterface * aliasIntf;
 101         int                     index;
 102         int                     multicastSocket4;
 103 #if HAVE_IPV6
 104         int                     multicastSocket6;
 105 #endif
 106         };
 107
 108 // This is a global because debugf_() needs to be able to check its value
 109 extern int gMDNSPlatformPosixVerboseLevel;
 110
 111 struct mDNS_PlatformSupport_struct
 112         {
 113         int unicastSocket4;
 114 #if HAVE_IPV6
 115         int unicastSocket6;
 116 #endif
 117         };
 118
 119 #define uDNS_SERVERS_FILE "/etc/resolv.conf"
 120 extern int ParseDNSServers(mDNS *m, const char *filePath);
 121 extern mStatus mDNSPlatformPosixRefreshInterfaceList(mDNS *const m);
 122     // See comment in implementation.
 123
 124 // Call mDNSPosixGetFDSet before calling select(), to update the parameters
 125 // as may be necessary to meet the needs of the mDNSCore code.
 126 // The timeout pointer MUST NOT be NULL.
 127 // Set timeout->tv_sec to 0x3FFFFFFF if you want to have effectively no timeout
 128 // After calling mDNSPosixGetFDSet(), call select(nfds, &readfds, NULL, NULL, &timeout); as usual
 129 // After select() returns, call mDNSPosixProcessFDSet() to let mDNSCore do its work
 130 extern void mDNSPosixGetFDSet(mDNS *m, int *nfds, fd_set *readfds, struct timeval *timeout);
 131 extern void mDNSPosixProcessFDSet(mDNS *const m, fd_set *readfds);
 132
 133 typedef void (*mDNSPosixEventCallback)( void *context);
 134
 135 extern mStatus mDNSPosixAddFDToEventLoop( int fd, mDNSPosixEventCallback callback, void *context);
 136 extern mStatus mDNSPosixRemoveFDFromEventLoop( int fd);
 137 extern mStatus mDNSPosixListenForSignalInEventLoop( int signum);
 138 extern mStatus mDNSPosixIgnoreSignalInEventLoop( int signum);
 139 extern mStatus mDNSPosixRunEventLoopOnce( mDNS *m, const struct timeval *pTimeout, sigset_t *pSignalsReceived, mDNSBool *pDataDispatched);
 140
 141 #ifdef  __cplusplus
 142     }
 143 #endif
 144
 145 #endif