OutputSocket Class Reference

#include <Groupsock.hh>

Inheritance diagram for OutputSocket:

[legend]Collaboration diagram for OutputSocket:


Public Member Functions
	OutputSocket (UsageEnvironment &env)
virtual	~OutputSocket ()
Boolean	write (netAddressBits address, Port port, u_int8_t ttl, unsigned char *buffer, unsigned bufferSize)
int	socketNum () const
Port	port () const
UsageEnvironment &	env () const
Static Public Attributes
static int	DebugLevel = 1
static UsageEnvironment *	DefaultUsageEnvironment = NULL
Protected Member Functions
	OutputSocket (UsageEnvironment &env, Port port)
portNumBits	sourcePortNum () const
Boolean	changePort (Port newPort)
Private Member Functions
virtual Boolean	handleRead (unsigned char *buffer, unsigned bufferMaxSize, unsigned &bytesRead, struct sockaddr_in &fromAddress)
Private Attributes
Port	fSourcePort
u_int8_t	fLastSentTTL

Detailed Description

Definition at line 39 of file Groupsock.hh.

Constructor & Destructor Documentation

OutputSocket::OutputSocket ( UsageEnvironment & env )

Definition at line 40 of file Groupsock.cpp.

00041   : Socket(env, 0 /* let kernel choose port */),
00042     fSourcePort(0), fLastSentTTL(0) {
00043 }

OutputSocket::~OutputSocket ( ) [virtual]

Definition at line 50 of file Groupsock.cpp.

00050                             {
00051 }

OutputSocket::OutputSocket	(	UsageEnvironment &	env,
		Port	port
	)			`[protected]`

Definition at line 45 of file Groupsock.cpp.

00046   : Socket(env, port),
00047     fSourcePort(0), fLastSentTTL(0) {
00048 }

Member Function Documentation

Boolean OutputSocket::write	(	netAddressBits	address,
		Port	port,
		u_int8_t	ttl,
		unsigned char *	buffer,
		unsigned	bufferSize
	)

Definition at line 53 of file Groupsock.cpp.

References Socket::DebugLevel, Socket::env(), False, fLastSentTTL, fSourcePort, UsageEnvironment::getResultMsg(), getSourcePort(), Socket::port(), Socket::socketNum(), sourcePortNum(), True, and writeSocket().

Referenced by Groupsock::output().

00054                                                                         {
00055   if (ttl == fLastSentTTL) {
00056     // Optimization: So we don't do a 'set TTL' system call again
00057     ttl = 0;
00058   } else {
00059     fLastSentTTL = ttl;
00060   }
00061   struct in_addr destAddr; destAddr.s_addr = address;
00062   if (!writeSocket(env(), socketNum(), destAddr, port, ttl,
00063                    buffer, bufferSize))
00064     return False;
00065   
00066   if (sourcePortNum() == 0) {
00067     // Now that we've sent a packet, we can find out what the
00068     // kernel chose as our ephemeral source port number:
00069     if (!getSourcePort(env(), socketNum(), fSourcePort)) {
00070       if (DebugLevel >= 1)
00071         env() << *this
00072              << ": failed to get source port: "
00073              << env().getResultMsg() << "\n";
00074       return False;
00075     }
00076   }
00077   
00078   return True;
00079 }

portNumBits OutputSocket::sourcePortNum ( ) const [inline, protected]

Definition at line 50 of file Groupsock.hh.

References fSourcePort, and Port::num().

Referenced by Groupsock::wasLoopedBackFromUs(), and write().

00050 {return fSourcePort.num();}

Boolean OutputSocket::handleRead	(	unsigned char *	buffer,
		unsigned	bufferMaxSize,
		unsigned &	bytesRead,
		struct sockaddr_in &	fromAddress
	)			`[private, virtual]`

Implements Socket.

Reimplemented in Groupsock.

Definition at line 83 of file Groupsock.cpp.

References True.

00084                                                                            {
00085   return True;
00086 }

int Socket::socketNum ( ) const [inline, inherited]

Port Socket::port ( ) const [inline, inherited]

Definition at line 91 of file NetInterface.hh.

References Socket::fPort.

Referenced by Groupsock::addDestination(), PassiveServerMediaSubsession::getStreamParameters(), Groupsock::Groupsock(), operator<<(), SocketLookupTable::Remove(), GroupsockLookupTable::Remove(), Groupsock::removeDestination(), PassiveServerMediaSubsession::sdpLines(), Socket::Socket(), and write().

00091                     {
00092     return fPort;
00093   }

UsageEnvironment& Socket::env ( ) const [inline, inherited]

Definition at line 95 of file NetInterface.hh.

References Socket::fEnv.

Referenced by Groupsock::changeDestinationParameters(), getGroupsockBySocket(), getSocketTable(), Groupsock::Groupsock(), Groupsock::handleRead(), Groupsock::multicastSendOnly(), Groupsock::output(), Groupsock::outputToAllMembersExcept(), setGroupsockBySocket(), socketReadHandler(), unsetGroupsockBySocket(), Groupsock::wasLoopedBackFromUs(), write(), and Groupsock::~Groupsock().

00095 { return fEnv; }

Boolean Socket::changePort ( Port newPort ) [protected, inherited]

Definition at line 104 of file NetInterface.cpp.

References closeSocket, Socket::fEnv, Socket::fSetLoopback, Socket::fSocketNum, and setupDatagramSocket().

Referenced by Groupsock::changeDestinationParameters().

00104                                        {
00105   closeSocket(fSocketNum);
00106   fSocketNum = setupDatagramSocket(fEnv, newPort, fSetLoopback);
00107   return fSocketNum >= 0;
00108 }