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
  18 #ifndef __mDNSPlatformPosix_h
  19 #define __mDNSPlatformPosix_h
  20
  21 #include <signal.h>
  22 #include <sys/time.h>
  23
  24 #ifdef  __cplusplus
  25     extern "C" {
  26 #endif
  27
  28 // PosixNetworkInterface is a record extension of the core NetworkInterfaceInfo
  29 // type that supports extra fields needed by the Posix platform.
  30 //
  31 // IMPORTANT: coreIntf must be the first field in the structure because
  32 // we cast between pointers to the two different types regularly.
  33
  34 typedef struct PosixNetworkInterface PosixNetworkInterface;
  35
  36 struct PosixNetworkInterface
  37         {
  38         NetworkInterfaceInfo    coreIntf;
  39         const char *            intfName;
  40         PosixNetworkInterface * aliasIntf;
  41         int                     index;
  42         int                     multicastSocket4;
  43 #if HAVE_IPV6
  44         int                     multicastSocket6;
  45 #endif
  46         };
  47
  48 // This is a global because debugf_() needs to be able to check its value
  49 extern int gMDNSPlatformPosixVerboseLevel;
  50
  51 struct mDNS_PlatformSupport_struct
  52         {
  53         int unicastSocket4;
  54 #if HAVE_IPV6
  55         int unicastSocket6;
  56 #endif
  57         };
  58
  59 #define uDNS_SERVERS_FILE "/etc/resolv.conf"
  60 extern int ParseDNSServers(mDNS *m, const char *filePath);
  61 extern mStatus mDNSPlatformPosixRefreshInterfaceList(mDNS *const m);
  62     // See comment in implementation.
  63
  64 // Call mDNSPosixGetFDSet before calling select(), to update the parameters
  65 // as may be necessary to meet the needs of the mDNSCore code.
  66 // The timeout pointer MUST NOT be NULL.
  67 // Set timeout->tv_sec to 0x3FFFFFFF if you want to have effectively no timeout
  68 // After calling mDNSPosixGetFDSet(), call select(nfds, &readfds, NULL, NULL, &timeout); as usual
  69 // After select() returns, call mDNSPosixProcessFDSet() to let mDNSCore do its work
  70 extern void mDNSPosixGetFDSet(mDNS *m, int *nfds, fd_set *readfds, struct timeval *timeout);
  71 extern void mDNSPosixProcessFDSet(mDNS *const m, fd_set *readfds);
  72
  73 typedef void (*mDNSPosixEventCallback)(int fd, short filter, void *context);
  74
  75 extern mStatus mDNSPosixAddFDToEventLoop( int fd, mDNSPosixEventCallback callback, void *context);
  76 extern mStatus mDNSPosixRemoveFDFromEventLoop( int fd);
  77 extern mStatus mDNSPosixListenForSignalInEventLoop( int signum);
  78 extern mStatus mDNSPosixIgnoreSignalInEventLoop( int signum);
  79 extern mStatus mDNSPosixRunEventLoopOnce( mDNS *m, const struct timeval *pTimeout, sigset_t *pSignalsReceived, mDNSBool *pDataDispatched);
  80
  81 #ifdef  __cplusplus
  82     }
  83 #endif
  84
  85 #endif