1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/**********
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "mTunnel" multicast access service
// Copyright (c) 1996-2001 Live Networks, Inc. All rights reserved.
// Helper routines to implement 'group sockets'
// C++ header
#ifndef _GROUPSOCK_HELPER_HH
#define _GROUPSOCK_HELPER_HH
#ifndef _NET_ADDRESS_HH
#include "NetAddress.hh"
#endif
int setupDatagramSocket(UsageEnvironment& env,
Port port, Boolean setLoopback = True);
int setupStreamSocket(UsageEnvironment& env,
Port port, Boolean makeNonBlocking = True);
int readSocket(UsageEnvironment& env,
int socket, unsigned char* buffer, unsigned bufferSize,
struct sockaddr_in& fromAddress,
struct timeval* timeout = NULL);
int readSocketExact(UsageEnvironment& env,
int socket, unsigned char* buffer, unsigned bufferSize,
struct sockaddr_in& fromAddress,
struct timeval* timeout = NULL);
// like "readSocket()", except that it rereads as many times as needed until
// *exactly* "bufferSize" bytes are read.
Boolean writeSocket(UsageEnvironment& env,
int socket, struct in_addr address, Port port,
u_int8_t ttlArg,
unsigned char* buffer, unsigned bufferSize);
unsigned getSendBufferSize(UsageEnvironment& env, int socket);
unsigned getReceiveBufferSize(UsageEnvironment& env, int socket);
unsigned setSendBufferTo(UsageEnvironment& env,
int socket, unsigned requestedSize);
unsigned setReceiveBufferTo(UsageEnvironment& env,
int socket, unsigned requestedSize);
unsigned increaseSendBufferTo(UsageEnvironment& env,
int socket, unsigned requestedSize);
unsigned increaseReceiveBufferTo(UsageEnvironment& env,
int socket, unsigned requestedSize);
Boolean socketJoinGroup(UsageEnvironment& env, int socket,
netAddressBits groupAddress);
Boolean socketLeaveGroup(UsageEnvironment&, int socket,
netAddressBits groupAddress);
// source-specific multicast join/leave
Boolean socketJoinGroupSSM(UsageEnvironment& env, int socket,
netAddressBits groupAddress,
netAddressBits sourceFilterAddr);
Boolean socketLeaveGroupSSM(UsageEnvironment&, int socket,
netAddressBits groupAddress,
netAddressBits sourceFilterAddr);
Boolean getSourcePort(UsageEnvironment& env, int socket, Port& port);
netAddressBits ourSourceAddressForMulticast(UsageEnvironment& env); // in network order
// IP addresses of our sending and receiving interfaces. (By default, these
// are INADDR_ANY (i.e., 0), specifying the default interface.)
extern netAddressBits SendingInterfaceAddr;
extern netAddressBits ReceivingInterfaceAddr;
// Allocates a randomly-chosen IPv4 SSM (multicast) address:
netAddressBits chooseRandomIPv4SSMAddress(UsageEnvironment& env);
// Returns a simple "hh:mm:ss" string, for use in debugging output (e.g.)
char const* timestampString();
#if (defined(__WIN32__) || defined(_WIN32)) && !defined(IMN_PIM)
// For Windoze, we need to implement our own gettimeofday()
extern int gettimeofday(struct timeval*, int*);
#endif
// The following are implemented in inet.c:
extern "C" netAddressBits our_inet_addr(char const*);
extern "C" char* our_inet_ntoa(struct in_addr);
extern "C" struct hostent* our_gethostbyname(char* name);
extern "C" void our_srandom(int x);
extern "C" long our_random();
extern "C" u_int32_t our_random32(); // because "our_random()" returns a 31-bit number
#endif
|
