ASSA::UnConUDPSocket Class Reference

#include <UnConUDPSocket.h>

Inheritance diagram for ASSA::UnConUDPSocket:

[legend]Collaboration diagram for ASSA::UnConUDPSocket:

[legend]List of all members.

Public Member Functions
	UnConUDPSocket ()
	Constructor.
	~UnConUDPSocket ()
	Destructor.
int	recvfrom (char *buf_, int size_, Address *peer_addr_)
	recvfrom() function receives a message from connectionless-mode socket.
int	sendto (const char *buf_, const unsigned int size_, const Address *dest_addr_)
	sendto() function sends a message through connectionless-mode socket.
virtual int	in_avail () const
	This function returns the number of characters immediately available in the get area of the underlying Socketbuf buffer without making a system call.

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Detailed Description

Definition at line 26 of file UnConUDPSocket.h.

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Constructor & Destructor Documentation

ASSA::UnConUDPSocket::UnConUDPSocket (   )

Constructor. Definition at line 70 of file UnConUDPSocket.h. References ASSA::SOCKTRACE, and trace_with_mask. : UDPSocket() { trace_with_mask ("UnConUDPSocket::UnConUDPSocket", SOCKTRACE); }

ASSA::UnConUDPSocket::~UnConUDPSocket (   )

Destructor. Definition at line 76 of file UnConUDPSocket.h. References ASSA::SOCKTRACE, and trace_with_mask. { trace_with_mask ("UnConUDPSocket::~UnConUDPSocket", SOCKTRACE); }

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Member Function Documentation

virtual int ASSA::UnConUDPSocket::in_avail (   )  const [inline, virtual]

This function returns the number of characters immediately available in the get area of the underlying Socketbuf buffer without making a system call. Always return 0. Implements ASSA::Socket. Definition at line 66 of file UnConUDPSocket.h. { return 0; }

int UnConUDPSocket::recvfrom (  char *  buf_, int  size_, Address *  peer_addr_ )

recvfrom() function receives a message from connectionless-mode socket. It also permits the application to retrieve the source address of received data. Parameters: buf_  points to buffer where the message should be stored size_  buffer length is bytes peer_addr_  pointer to the address structure where sending address is to be stored Returns: length of the peer address Definition at line 25 of file UnConUDPSocket.cpp. References ASSA::Address::getAddress(), ASSA::UDPSocket::getHandler(), and ASSA::Address::getLength(). { // ::recvfrom() can return 0 bytes which is not // considered an eof. Peer can advertise its address to // the server by sending 0 bytes length message. // // char self[] = "Socket::recvfro"; trace(self); // Setting saddr_len is crucial to proper ::recvfrom() operation. // If left improprely initialized, ::recvfrom() won't fill in peer's // address and won't report an error either. If SA ptr is passed to // recvfrom() along with uninitialized address len (or set to 0), // recvfrom() returns zeroed out address structure!!! int len; socklen_t pa_len = peer_addr_->getLength(); SA* pa = peer_addr_->getAddress(); #if defined (__CYGWIN32__) || defined (WIN32) len = ::recvfrom(getHandler(), buf_, size_, 0, pa, (int*)&pa_len); #else // posix/unix len = ::recvfrom(getHandler(), buf_, size_, 0, pa, &pa_len); #endif // Q: for UNIX domain socket, returned length will be essential to // remember and probably should be set in peer_addr_ by calling // setLength()..... return len; }

int UnConUDPSocket::sendto (  const char *  buf_, const unsigned int  size_, const Address *  dest_addr_ )

sendto() function sends a message through connectionless-mode socket. The message will be sent to the address specified by dest_addr_. Parameters: buf_  pointer to the buffer containing the message to be sent size_  the size of the message in bytes dest_addr_  contains destination address Returns: upon successful completion, number of bytes sent. Otherwise, -1. Definition at line 60 of file UnConUDPSocket.cpp. References ASSA::Address::getAddress(), ASSA::UDPSocket::getHandler(), and ASSA::Address::getLength(). { return ::sendto (getHandler(), buf_, size_, 0, peer_addr_->getAddress(), peer_addr_->getLength()); }

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The documentation for this class was generated from the following files:

• /home/vlg/develop/libASSA/libassa/assa/UnConUDPSocket.h
• /home/vlg/develop/libASSA/libassa/assa/UnConUDPSocket.cpp

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