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L2packets: add getsockname() to net layer

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sniff gameclient: add option to bind outcoming socket to some port (TeonPvP hacks)
This commit is contained in:
alexey.min 2012-02-13 04:14:19 +00:00
parent 99d453d594
commit 47d580dae8
3 changed files with 46 additions and 3 deletions
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18
l2detect/GameClient_sniff.cpp
View File

@ -36,6 +36,24 @@ bool GameClient::PC_sniff( SOCKET scl, unsigned char *sip, unsigned short int sp
return false;
}
// TeonPVP hack
if( g_cfg.TeonPvP_hacks )
{
unsigned short teon_port = 43880;
log_error( LOG_WARNING, "TeonPvP hacks: bind to port %d\n", teon_port );
int rr = L2PNet_bind( sg, "0.0.0.0", teon_port );
if( rr != 0 )
log_error( LOG_ERROR, "TeonPvP hacks: bind failed!!!!\n" );
sockaddr_in soaddr;
memset( &soaddr, 0, sizeof(soaddr) );
rr = L2PNet_getsockname( (SOCKET)sg, &soaddr );
if( rr == 0 )
{
log_error( LOG_OK, "TeonPvP hacks: Bound outcome socket to address %s:%d\n",
L2PNet_inet_ntoa(soaddr.sin_addr), (int)L2PNet_ntohs(soaddr.sin_port) );
}
}
// connect to real game server
log_error( LOG_DEBUG, "GameClient::ProcessClient_onlySniff(): Connecting to real game server %s:%d ", ssip, (int)sport );
L2PNet_connect( sg, ssip, sport );

22
l2packets/net_io/L2Packet_NetLayer.cpp
View File

@ -3,12 +3,12 @@
#include <ws2tcpip.h>
// network function pointers table
#define l2pnet_ft_size 11
void *l2pnet_ft[l2pnet_ft_size] = {0, 0,0,0, 0,0,0, 0,0,0, 0};
#define l2pnet_ft_size 12
void *l2pnet_ft[l2pnet_ft_size] = {0, 0,0,0, 0,0,0, 0,0,0, 0,0}; // winsock override function table
CRITICAL_SECTION l2pnet_cs;
// winsock2 functions
HINSTANCE l2pnet_hws2_32;
void *ws2_func[l2pnet_ft_size] = {0, 0,0,0, 0,0,0, 0,0,0, 0};
void *ws2_func[l2pnet_ft_size] = {0, 0,0,0, 0,0,0, 0,0,0, 0,0};
char l2pnet_static_inet_ntoa_buffer[32];
typedef int (__stdcall *select_func)( int, fd_set *, fd_set *, fd_set *, const struct timeval *);
@ -19,6 +19,7 @@ typedef int (__stdcall *WSACleanup_func)(void);
//typedef void *(__stdcall *gethostbyname_func)( const char * );
typedef int (__stdcall *getaddrinfo_func)( const char *, const char *, void *, void * ); /* Success returns zero. Failure returns error code */
typedef void (__stdcall *freeaddrinfo_func)( void * );
typedef int (__stdcall *getsockname_func)( unsigned int, void *, void * );
//select_func select_winsock = NULL;
@ -57,6 +58,7 @@ int L2PNet_InitDefault()
ws2_func[L2PFUNC_SELECT] = (void *)GetProcAddress( l2pnet_hws2_32, "select" );
ws2_func[L2PFUNC_SOCKET] = (void *)GetProcAddress( l2pnet_hws2_32, "socket" );
ws2_func[L2PFUNC_LISTEN] = (void *)GetProcAddress( l2pnet_hws2_32, "listen" );
ws2_func[L2PFUNC_GETSOCKNAME] = (void *)GetProcAddress( l2pnet_hws2_32, "getsockname" );
for( i=1; i<l2pnet_ft_size; i++ )
{
if( ws2_func[i] == NULL )
@ -632,3 +634,17 @@ bool L2PNet_resolveHostname( const char *hostname, struct in_addr *pinAddr )
}
return true;
}
int L2PNet_getsockname( unsigned int sock, struct sockaddr_in *saddr )
{
int ret = -1;
int addrlen = sizeof(sockaddr_in);
getsockname_func proxy_getsockname = (getsockname_func)l2pnet_ft[L2PFUNC_GETSOCKNAME]; // find override
if( proxy_getsockname == NULL ) // no overrides
proxy_getsockname = (getsockname_func)ws2_func[L2PFUNC_GETSOCKNAME]; // call original
if( proxy_getsockname == NULL ) // still??
return -1;
ret = proxy_getsockname( sock, (void *)saddr, (void *)&addrlen );
return ret;
}

9
l2packets/net_io/L2Packet_NetLayer.h
View File

@ -30,6 +30,7 @@ int L2PNet_Cleanup();
#define L2PFUNC_SELECT 8
#define L2PFUNC_SOCKET 9
#define L2PFUNC_LISTEN 10
#define L2PFUNC_GETSOCKNAME 11
/** Overrides specified function for L2Packets network layer.\n
* New function must have the same prototype as corresponding
* L2PNet_* function!
@ -192,4 +193,12 @@ int L2PNet_FD_ISSET( unsigned int sock, fd_set *set );
*/
bool L2PNet_resolveHostname( const char *hostname, struct in_addr *pinAddr );
/** Gets local socket address.\n
* \param sock socket
* \param saddr output struct that receives address
* \return 0 on success
*/
int L2PNet_getsockname( unsigned int sock, struct sockaddr_in *saddr );
#endif /* H_L2P_NET_LAYER */