jmulticastsocketbuffer.cpp
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/***************************************************************************
* Copyright (C) 2005 by Jeff Ferr *
* root@sat *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "jmulticastsocketbuffer.h"
#include "jsocketexception.h"
#include "jioexception.h"
#include <stdio.h>
#include <errno.h>
namespace jsocket {
MulticastSocketBuffer::MulticastSocketBuffer(int16_t fds_, int16_t fdr_, sockaddr_in sock_s_, sockaddr_in sock_r_, uint32_t size_)//:
// std::streambuf()
{
_fds = fds_;
_fdr = fdr_;
_sock_s = sock_s_;
_sock_r = sock_r_;
_size_buffer = size_;
_buffer_in = new char[size_];
_buffer_out = new char[size_];
// TODO:: if (buffer_in || buffer_out) == NULL
setg(_buffer_in, _buffer_in, _buffer_in);
setp(_buffer_out, _buffer_out + size_);
_sent_bytes = 0LL;
_receive_bytes = 0LL;
}
MulticastSocketBuffer::~MulticastSocketBuffer()
{
delete [] _buffer_in;
delete [] _buffer_out;
}
int MulticastSocketBuffer::sync()
{
std::streamsize n = pptr() - pbase();
int16_t sent;
sent = sendto(_fds, pbase(), n, 0, (SA*)&_sock_s, sizeof(_sock_s));
if (n && sent != n) {
return EOF;
}
_sent_bytes += sent;
pbump(-n);
return 0;
}
int MulticastSocketBuffer::overflow(int ch)
{
if (sync() == EOF) {
return EOF;
}
if (ch != EOF) {
pbase()[0] = ch;
pbump(1);
}
return 0;
}
int MulticastSocketBuffer::underflow()
{
int n, size;
size = sizeof(struct sockaddr_in);
n = recvfrom(_fdr, eback(), _size_buffer, 0, (SA *)&_sock_r, (socklen_t*)&size);
if (n < 0 && errno == EAGAIN) {
throw SocketException("Socket timeout exception !");
} else if (n < 0) {
throw IOException("Read socket error !");
}
_receive_bytes += n;
setg(eback(), eback(), eback()+n);
return *eback();
}
uint64_t MulticastSocketBuffer::GetSentBytes()
{
return _sent_bytes;
}
uint64_t MulticastSocketBuffer::GetReceiveBytes()
{
return _receive_bytes;
}
};