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conn.cpp
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#include <exception>
#include <errno.h>
#include <string.h>
#include "conn.h"
#include "log.h"
#include "fdwrapper.h"
conn::conn()
{
m_srvfd = -1;
m_clt_buf = new char[ BUF_SIZE ];
if( !m_clt_buf )
{
throw std::exception();
}
m_srv_buf = new char[ BUF_SIZE ];
if( !m_srv_buf )
{
throw std::exception();
}
reset();
}
conn::~conn()
{
delete [] m_clt_buf;
delete [] m_srv_buf;
}
void conn::init_clt( int sockfd, const sockaddr_in& client_addr )
{
m_cltfd = sockfd;
m_clt_address = client_addr;
}
void conn::init_srv( int sockfd, const sockaddr_in& server_addr )
{
m_srvfd = sockfd;
m_srv_address = server_addr;
}
void conn::reset()
{
m_clt_read_idx = 0;
m_clt_write_idx = 0;
m_srv_read_idx = 0;
m_srv_write_idx = 0;
m_srv_closed = false;
m_cltfd = -1;
memset( m_clt_buf, '\0', BUF_SIZE );
memset( m_srv_buf, '\0', BUF_SIZE );
}
RET_CODE conn::read_clt()
{
int bytes_read = 0;
while( true )
{
if( m_clt_read_idx >= BUF_SIZE )
{
log( LOG_ERR, __FILE__, __LINE__, "%s", "the client read buffer is full, let server write" );
return BUFFER_FULL;
}
bytes_read = recv( m_cltfd, m_clt_buf + m_clt_read_idx, BUF_SIZE - m_clt_read_idx, 0 );
if ( bytes_read == -1 )
{
if( errno == EAGAIN || errno == EWOULDBLOCK )
{
break;
}
return IOERR;
}
else if ( bytes_read == 0 )
{
return CLOSED;
}
m_clt_read_idx += bytes_read;
}
return ( ( m_clt_read_idx - m_clt_write_idx ) > 0 ) ? OK : NOTHING;
}
RET_CODE conn::read_srv()
{
int bytes_read = 0;
while( true )
{
if( m_srv_read_idx >= BUF_SIZE )
{
log( LOG_ERR, __FILE__, __LINE__, "%s", "the server read buffer is full, let client write" );
return BUFFER_FULL;
}
bytes_read = recv( m_srvfd, m_srv_buf + m_srv_read_idx, BUF_SIZE - m_srv_read_idx, 0 );
if ( bytes_read == -1 )
{
if( errno == EAGAIN || errno == EWOULDBLOCK )
{
break;
}
return IOERR;
}
else if ( bytes_read == 0 )
{
log( LOG_ERR, __FILE__, __LINE__, "%s", "the server should not close the persist connection" );
return CLOSED;
}
m_srv_read_idx += bytes_read;
}
return ( ( m_srv_read_idx - m_srv_write_idx ) > 0 ) ? OK : NOTHING;
}
RET_CODE conn::write_srv()
{
int bytes_write = 0;
while( true )
{
if( m_clt_read_idx <= m_clt_write_idx )
{
m_clt_read_idx = 0;
m_clt_write_idx = 0;
return BUFFER_EMPTY;
}
bytes_write = send( m_srvfd, m_clt_buf + m_clt_write_idx, m_clt_read_idx - m_clt_write_idx, 0 );
if ( bytes_write == -1 )
{
if( errno == EAGAIN || errno == EWOULDBLOCK )
{
return TRY_AGAIN;
}
log( LOG_ERR, __FILE__, __LINE__, "write server socket failed, %s", strerror( errno ) );
return IOERR;
}
else if ( bytes_write == 0 )
{
return CLOSED;
}
m_clt_write_idx += bytes_write;
}
}
RET_CODE conn::write_clt()
{
int bytes_write = 0;
while( true )
{
if( m_srv_read_idx <= m_srv_write_idx )
{
m_srv_read_idx = 0;
m_srv_write_idx = 0;
return BUFFER_EMPTY;
}
bytes_write = send( m_cltfd, m_srv_buf + m_srv_write_idx, m_srv_read_idx - m_srv_write_idx, 0 );
if ( bytes_write == -1 )
{
if( errno == EAGAIN || errno == EWOULDBLOCK )
{
return TRY_AGAIN;
}
log( LOG_ERR, __FILE__, __LINE__, "write client socket failed, %s", strerror( errno ) );
return IOERR;
}
else if ( bytes_write == 0 )
{
return CLOSED;
}
m_srv_write_idx += bytes_write;
}
}