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      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 #ifdef __ANDROID__
     24 #include <sys/select.h>
     25 #endif
     26 
     27 #ifdef  __cplusplus
     28     extern "C" {
     29 #endif
     30 
     31 // PosixNetworkInterface is a record extension of the core NetworkInterfaceInfo
     32 // type that supports extra fields needed by the Posix platform.
     33 //
     34 // IMPORTANT: coreIntf must be the first field in the structure because
     35 // we cast between pointers to the two different types regularly.
     36 
     37 typedef struct PosixNetworkInterface PosixNetworkInterface;
     38 
     39 struct PosixNetworkInterface
     40 	{
     41 	NetworkInterfaceInfo    coreIntf;
     42 	const char *            intfName;
     43 	PosixNetworkInterface * aliasIntf;
     44 	int                     index;
     45 	int                     multicastSocket4;
     46 #if HAVE_IPV6
     47 	int                     multicastSocket6;
     48 #endif
     49 	};
     50 
     51 // This is a global because debugf_() needs to be able to check its value
     52 extern int gMDNSPlatformPosixVerboseLevel;
     53 
     54 struct mDNS_PlatformSupport_struct
     55 	{
     56 	int unicastSocket4;
     57 #if HAVE_IPV6
     58 	int unicastSocket6;
     59 #endif
     60 	};
     61 
     62 #define uDNS_SERVERS_FILE "/etc/resolv.conf"
     63 extern int ParseDNSServers(mDNS *m, const char *filePath);
     64 extern mStatus mDNSPlatformPosixRefreshInterfaceList(mDNS *const m);
     65     // See comment in implementation.
     66 
     67 // Call mDNSPosixGetFDSet before calling select(), to update the parameters
     68 // as may be necessary to meet the needs of the mDNSCore code.
     69 // The timeout pointer MUST NOT be NULL.
     70 // Set timeout->tv_sec to 0x3FFFFFFF if you want to have effectively no timeout
     71 // After calling mDNSPosixGetFDSet(), call select(nfds, &readfds, NULL, NULL, &timeout); as usual
     72 // After select() returns, call mDNSPosixProcessFDSet() to let mDNSCore do its work
     73 extern void mDNSPosixGetFDSet(mDNS *m, int *nfds, fd_set *readfds, struct timeval *timeout);
     74 extern void mDNSPosixProcessFDSet(mDNS *const m, fd_set *readfds);
     75 
     76 typedef	void (*mDNSPosixEventCallback)(int fd, short filter, void *context);
     77 
     78 extern mStatus mDNSPosixAddFDToEventLoop( int fd, mDNSPosixEventCallback callback, void *context);
     79 extern mStatus mDNSPosixRemoveFDFromEventLoop( int fd);
     80 extern mStatus mDNSPosixListenForSignalInEventLoop( int signum);
     81 extern mStatus mDNSPosixIgnoreSignalInEventLoop( int signum);
     82 extern mStatus mDNSPosixRunEventLoopOnce( mDNS *m, const struct timeval *pTimeout, sigset_t *pSignalsReceived, mDNSBool *pDataDispatched);
     83 
     84 #ifdef  __cplusplus
     85     }
     86 #endif
     87 
     88 #endif
     89