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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