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; // MUST be the first element in this structure 39 mDNSs32 LastSeen; 40 const char * intfName; 41 PosixNetworkInterface * aliasIntf; 42 int index; 43 int multicastSocket4; 44 #if HAVE_IPV6 45 int multicastSocket6; 46 #endif 47 }; 48 49 // This is a global because debugf_() needs to be able to check its value 50 extern int gMDNSPlatformPosixVerboseLevel; 51 52 struct mDNS_PlatformSupport_struct 53 { 54 int unicastSocket4; 55 #if HAVE_IPV6 56 int unicastSocket6; 57 #endif 58 }; 59 60 #define uDNS_SERVERS_FILE "/etc/resolv.conf" 61 extern int ParseDNSServers(mDNS *m, const char *filePath); 62 extern mStatus mDNSPlatformPosixRefreshInterfaceList(mDNS *const m); 63 // See comment in implementation. 64 65 // Call mDNSPosixGetFDSet before calling select(), to update the parameters 66 // as may be necessary to meet the needs of the mDNSCore code. 67 // The timeout pointer MUST NOT be NULL. 68 // Set timeout->tv_sec to FutureTime if you want to have effectively no timeout 69 // After calling mDNSPosixGetFDSet(), call select(nfds, &readfds, NULL, NULL, &timeout); as usual 70 // After select() returns, call mDNSPosixProcessFDSet() to let mDNSCore do its work 71 extern void mDNSPosixGetFDSet(mDNS *m, int *nfds, fd_set *readfds, struct timeval *timeout); 72 extern void mDNSPosixProcessFDSet(mDNS *const m, fd_set *readfds); 73 74 typedef void (*mDNSPosixEventCallback)(int fd, short filter, void *context); 75 76 extern mStatus mDNSPosixAddFDToEventLoop( int fd, mDNSPosixEventCallback callback, void *context); 77 extern mStatus mDNSPosixRemoveFDFromEventLoop( int fd); 78 extern mStatus mDNSPosixListenForSignalInEventLoop( int signum); 79 extern mStatus mDNSPosixIgnoreSignalInEventLoop( int signum); 80 extern mStatus mDNSPosixRunEventLoopOnce( mDNS *m, const struct timeval *pTimeout, sigset_t *pSignalsReceived, mDNSBool *pDataDispatched); 81 82 #ifdef __cplusplus 83 } 84 #endif 85 86 #endif 87