121 lines
2.4 KiB
C++
121 lines
2.4 KiB
C++
|
//========= Copyright Valve Corporation, All rights reserved. ============//
|
||
|
|
//
|
||
|
|
// Purpose:
|
||
|
|
//
|
||
|
|
//===========================================================================//
|
||
|
|
|
||
|
|
#include <winsock.h>
|
||
|
|
#include "udp_socket.h"
|
||
|
|
#include "tier1/utlbuffer.h"
|
||
|
|
#include "tier1/strtools.h"
|
||
|
|
|
||
|
|
class CUDPSocket::CImpl
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
struct sockaddr_in m_SocketIP;
|
||
|
|
};
|
||
|
|
|
||
|
|
CUDPSocket::CUDPSocket( ) :
|
||
|
|
m_socketIP(),
|
||
|
|
m_Socket( INVALID_SOCKET ),
|
||
|
|
m_Port( 0 ),
|
||
|
|
m_pImpl( new CImpl )
|
||
|
|
{
|
||
|
|
Q_memset( &m_socketIP, 0, sizeof( m_socketIP ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
CUDPSocket::~CUDPSocket()
|
||
|
|
{
|
||
|
|
delete m_pImpl;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool CUDPSocket::Init( unsigned short nBindToPort )
|
||
|
|
{
|
||
|
|
m_Port = nBindToPort;
|
||
|
|
struct sockaddr_in address;
|
||
|
|
|
||
|
|
m_Socket = socket( PF_INET, SOCK_DGRAM, IPPROTO_UDP );
|
||
|
|
if ( m_Socket == INVALID_SOCKET )
|
||
|
|
return false;
|
||
|
|
|
||
|
|
address = m_pImpl->m_SocketIP;
|
||
|
|
address.sin_family = AF_INET;
|
||
|
|
address.sin_port = htons( m_Port );
|
||
|
|
address.sin_addr.S_un.S_addr = INADDR_ANY;
|
||
|
|
|
||
|
|
if ( SOCKET_ERROR == bind( m_Socket, ( struct sockaddr * )&address, sizeof( address ) ) )
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set to non-blocking i/o
|
||
|
|
unsigned long value = 1;
|
||
|
|
if ( SOCKET_ERROR == ioctlsocket( m_Socket, FIONBIO, &value ) )
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
void CUDPSocket::Shutdown()
|
||
|
|
{
|
||
|
|
if ( m_Socket != INVALID_SOCKET )
|
||
|
|
{
|
||
|
|
closesocket( static_cast<unsigned int>( m_Socket ));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
bool CUDPSocket::RecvFrom( netadr_t& packet_from, CUtlBuffer& data )
|
||
|
|
{
|
||
|
|
sockaddr from;
|
||
|
|
int nFromLen = sizeof( from );
|
||
|
|
|
||
|
|
int nMaxBytesToRead = data.Size() - data.TellPut();
|
||
|
|
char *pBuffer = (char*)data.PeekPut();
|
||
|
|
|
||
|
|
int nBytesRead = recvfrom( m_Socket, pBuffer, nMaxBytesToRead, 0, &from, &nFromLen );
|
||
|
|
if ( nBytesRead == SOCKET_ERROR )
|
||
|
|
{
|
||
|
|
int nError = WSAGetLastError();
|
||
|
|
if ( nError != WSAEWOULDBLOCK )
|
||
|
|
{
|
||
|
|
Warning( "Socket error '%i'\n", nError );
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
packet_from.SetFromSockadr( &from );
|
||
|
|
data.SeekPut( CUtlBuffer::SEEK_CURRENT, nBytesRead );
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool CUDPSocket::SendTo( const netadr_t &recipient, const CUtlBuffer& data )
|
||
|
|
{
|
||
|
|
return SendTo( recipient, (const byte *)data.Base(), (size_t)data.TellPut() );
|
||
|
|
}
|
||
|
|
|
||
|
|
bool CUDPSocket::SendTo( const netadr_t &recipient, const byte *data, size_t datalength )
|
||
|
|
{
|
||
|
|
sockaddr dest;
|
||
|
|
recipient.ToSockadr( &dest );
|
||
|
|
|
||
|
|
// Send data
|
||
|
|
int bytesSent = sendto
|
||
|
|
(
|
||
|
|
m_Socket,
|
||
|
|
(const char *)data,
|
||
|
|
(int)datalength,
|
||
|
|
0,
|
||
|
|
reinterpret_cast< const sockaddr * >( &dest ),
|
||
|
|
sizeof( dest )
|
||
|
|
);
|
||
|
|
|
||
|
|
if ( SOCKET_ERROR == bytesSent )
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|