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#pragma once
#include <Windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#pragma comment( lib, "ws2_32.lib" )
#include <vector>
#include "err.hpp"
#include "util.hpp"
/*
protocol rules:
every msg must be xored
first byte is the xorkey
*/
namespace client
{
constexpr auto PORT_NUM = 6969;
constexpr auto BUFFER_SIZE = 255;
class c_connect {
public:
c_connect( const char* ip ) :
m_ip( inet_addr( ip ) ) { }
~c_connect( ) {
if( m_socket )
closesocket( m_socket );
WSACleanup( );
}
bool setup( ) {
int code{ };
if( WSAStartup( MAKEWORD( 2, 2 ), &m_wsdata ) )
code = err::ERR_WSA;
else {
m_socket = socket( AF_INET, SOCK_STREAM, 0 );
if( m_socket == INVALID_SOCKET )
code = err::ERR_WSA;
}
if( code != err::ERR_NONE ) {
MessageBoxA( nullptr, err::translate_err( code ), "", MB_OK );
return false;
}
return true;
}
bool connect( ) {
sockaddr_in server_address{ };
int code{ };
server_address.sin_addr.s_addr = m_ip;
server_address.sin_port = htons( PORT_NUM );
server_address.sin_family = AF_INET;
code = ::connect( m_socket, ( sockaddr* )( &server_address ),
sizeof( server_address ) );
if( code == -1 ) {
MessageBoxA( nullptr, err::translate_err( err::ERR_CONNECT ), "", MB_OK );
return false;
}
return true;
}
void decode_buffer( uint8_t* buf, size_t length ) {
auto key = buf[ 0 ];
for( size_t i{ 1 }; i < length; ++i )
buf[ i ] ^= key;
}
std::vector< uint8_t > get_msg( ) {
std::vector< uint8_t > ret;
char buffer[ BUFFER_SIZE ];
int received = 0;
while( true ) {
received = recv( m_socket, buffer, BUFFER_SIZE, 0 );
if( received < 0 )
break;
for( int i{ }; i < received; ++i )
ret.push_back( buffer[ i ] );
if( received < BUFFER_SIZE )
break;
}
if( ret.size( ) ) {
decode_buffer( ret.data( ), ret.size( ) );
ret.erase( ret.begin( ) );
}
return ret;
}
void send_msg( const uint8_t* msg, size_t length ) {
auto new_buffer = ( uint8_t* )( malloc( length + 1 ) );
auto key = util::random_number( 0, 255 ) & 0xff;
new_buffer[ 0 ] = key;
memcpy( new_buffer + 1,
msg,
length );
for( size_t i = 1; i < length + 1; ++i ) {
new_buffer[ i ] ^= key;
}
send( m_socket, ( char* )new_buffer, length + 1, 0 );
free( new_buffer );
}
private:
SOCKET m_socket;
WSADATA m_wsdata;
int m_ip;
};
}
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