Replace wsock32.dll

Replace wsock32.dll

// Wsock32.cpp: defines the entry point for the DLL application.
//:::::::::::::::::::::::::::::::::::::: :::::::::::::::::::::::::::::::::::::::: :::::::::::::

 

// Module: replaces wsock32.dll to implement packet interception.

// Author: shower

// Notes: compiled in VC ++ 6.0 XP

// Use the function forwarder to forward the export function that replaces wsock32.dll without intercept to syswsock32.dll (originally replaced wsock32.dll ),
// I have seen an article on the Internet replacing wsock32.dll, but I have not used a function forwarder, so it is complicated.

//:::::::::::::::::::::::::::::::::::::: :::::::::::::::::::::::::::::::::::::::: :::::::::::::

# Include "stdafx. H"

# Pragma comment (linker, "/export: accept = syswsock32.accept, @ 1 ")
# Pragma comment (linker, "/export: bind = syswsock32.bind, @ 2 ")
# Pragma comment (linker, "/export: closesocket = syswsock32.closesocket, @ 3 ")
# Pragma comment (linker, "/export: connect = syswsock32.connect, @ 4 ")
# Pragma comment (linker, "/export: getpeername = syswsock32.getpeername, @ 5 ")
# Pragma comment (linker, "/export: getsockname = syswsock32.getsockname, @ 6 ")
# Pragma comment (linker, "/export: getsockopt = syswsock32.getsockopt, @ 7 ")
# Pragma comment (linker, "/export: htons = syswsock32.htons, @ 9 ")
# Pragma comment (linker, "/export: htonl = syswsock32.htonl, @ 8 ")
# Pragma comment (linker, "/export: inet_addr = syswsock32.inet _ ADDR, @ 10 ")
# Pragma comment (linker, "/export: inet_ntoa = syswsock32.inet _ ntoa, @ 11 ")
# Pragma comment (linker, "/export: ioctlsocket = syswsock32.ioctlsocket, @ 12 ")
# Pragma comment (linker, "/export: Listen = syswsock32.listen, @ 13 ")
# Pragma comment (linker, "/export: ntohl = syswsock32.ntohl, @ 14 ")
# Pragma comment (linker, "/export: ntohs = syswsock32.ntohs, @ 15 ")
# Pragma comment (linker, "/export: Recv = _ Recv @ 16, @ 16 ")
# Pragma comment (linker, "/export: recvfrom = _ recvfrom @ 24, @ 17 ")
# Pragma comment (linker, "/export: Select = syswsock32.select, @ 18 ")
# Pragma comment (linker, "/export: Send = _ Send @ 16, @ 19 ")
# Pragma comment (linker, "/export: sendto = _ sendto @ 24, @ 20 ")
# Pragma comment (linker, "/export: setsockopt = syswsock32.setsockopt, @ 21 ")
# Pragma comment (linker, "/export: Socket = syswsock32.socket, @ 23 ")
# Pragma comment (linker, "/export: shutdown = syswsock32.shutdown, @ 22 ")
# Pragma comment (linker, "/export: migratewinsockconfiguration = syswsock32.migratewinsockconfiguration, @ 24 ")

# Pragma comment (linker, "/export: gethostbyname = syswsock32.gethostbyname, @ 52 ")
# Pragma comment (linker, "/export: gethostbyaddr = syswsock32.gethostbyaddr, @ 51 ")
# Pragma comment (linker, "/export: getprotobynumber = syswsock32.getprotobynumber, @ 54 ")
# Pragma comment (linker, "/export: getprotobyname = syswsock32.getprotobyname, @ 53 ")
# Pragma comment (linker, "/export: getservbyport = syswsock32.getservbyport, @ 56 ")
# Pragma comment (linker, "/export: getservbyname = syswsock32.getservbyname, @ 55 ")
# Pragma comment (linker, "/export: gethostname = syswsock32.gethostname, @ 57 ")

# Pragma comment (linker, "/export: wsaasyncselect = syswsock32.wsaasyncselect, @ 101 ")
# Pragma comment (linker, "/export: wsaasyncgethostbyname = syswsock32.wsaasyncgethostbyname, @ 103 ")
# Pragma comment (linker, "/export: wsaasyncgethostbyaddr = syswsock32.wsaasyncgethostbyaddr, @ 102 ")
# Pragma comment (linker, "/export: wsaasyncgetprotobynumber = syswsock32.wsaasyncgetprotobynumber, @ 104 ")
# Pragma comment (linker, "/export: wsaasyncgetprotobyname = syswsock32.wsaasyncgetprotobyname, @ 105 ")
# Pragma comment (linker, "/export: wsaasyncgetservbyport = syswsock32.wsaasyncgetservbyport, @ 106 ")
# Pragma comment (linker, "/export: wsaasyncgetservbyname = syswsock32.wsaasyncgetservbyname, @ 107 ")
# Pragma comment (linker, "/export: wsacancelasyncrequest = syswsock32.wsacancelasyncrequest, @ 108 ")
# Pragma comment (linker, "/export: wsasetblockinghook = syswsock32.wsasetblockinghook, @ 109 ")
# Pragma comment (linker, "/export: wsaunhookblockinghook = syswsock32.wsaunhookblockinghook, @ 110 ")
# Pragma comment (linker, "/export: wsagetlasterror = syswsock32.wsagetlasterror, @ 111 ")
# Pragma comment (linker, "/export: wsasetlasterror = syswsock32.wsasetlasterror, @ 112 ")
# Pragma comment (linker, "/export: wsacancelblockingcall = syswsock32.wsacancelblockingcall, @ 113 ")
# Pragma comment (linker, "/export: wsaisblocking = syswsock32.wsaisblocking, @ 114 ")
# Pragma comment (linker, "/export: wsastartup = syswsock32.wsastartup, @ 115 ")
# Pragma comment (linker, "/export: wsacleanup = syswsock32.wsacleanup, @ 116 ")
# Pragma comment (linker, "/export: ___ wsafdisset = syswsock32. _ wsafdisset, @ 151 ")

# Pragma comment (linker, "/export: wsarecvex = syswsock32.wsarecvex, @ 1107 ")
# Pragma comment (linker, "/export: wsapsetpostroutine = syswsock32.wsapsetpostroutine, @ 1000 ")
# Pragma comment (linker, "/export: WEP = syswsock32.wep, @ 500 ")
# Pragma comment (linker, "/export: transmitfile = syswsock32.transmitfile, @ 1140 ")
# Pragma comment (linker, "/export: setservicew = syswsock32.setservicew, @ 1118 ")
# Pragma comment (linker, "/export: setservicea = syswsock32.setservicea, @ 1117 ")
# Pragma comment (linker, "/export: sethostname = syswsock32.sethostname, @ 1105 ")

# Pragma comment (linker, "/export: s_perror = syswsock32.s _ perror, @ 1108 ")
# Pragma comment (linker, "/export: rresvport = syswsock32.rresvport, @ 1104 ")
# Pragma comment (linker, "/export: rexec = syswsock32.rexec, @ 1103 ")
# Pragma comment (linker, "/export: RCMD = syswsock32.rcmd, @ 1102 ")
# Pragma comment (linker, "/export: nploadnamespaces = syswsock32.nploadnamespaces, @ 1130 ")

# Pragma comment (linker, "/export: inet_network = syswsock32.inet _ network, @ 1100 ")
# Pragma comment (linker, "/export: gettypebynamew = syswsock32.gettypebynamew, @ 1114 ")
# Pragma comment (linker, "/export: gettypebynamea = syswsock32.gettypebynamea, @ 1113 ")
# Pragma comment (linker, "/export: getservicew = syswsock32.getservicew, @ 1120 ")
# Pragma comment (linker, "/export: getservicea = syswsock32.getservicea, @ 1119 ")
# Pragma comment (linker, "/export: getnetbyname = syswsock32.getnetbyname, @ 1101 ")
# Pragma comment (linker, "/export: getnamebytypew = syswsock32.getnamebytypew, @ 1116 ")
# Pragma comment (linker, "/export: getnamebytypea = syswsock32.getnamebytypea, @ 1115 ")
# Pragma comment (linker, "/export: getaddressbynamew = syswsock32.getaddressbynamew, @ 1110 ")
# Pragma comment (linker, "/export: getaddressbynamea = syswsock32.getaddressbynamea, @ 1109 ")
# Pragma comment (linker, "/export: getacceptexsockaddrs = syswsock32.getacceptexsockaddrs, @ 1142 ")
# Pragma comment (linker, "/export: enumprotocolsw = syswsock32.enumprotocolsw, @ 1112 ")
# Pragma comment (linker, "/export: enumprotocolsa = syswsock32.enumprotocolsa, @ 1111 ")
# Pragma comment (linker, "/export: dn_expand = syswsock32.dn _ expand, @ 1106 ")
# Pragma comment (linker, "/export: acceptex = syswsock32.acceptex, @ 1141 ")

 

Typedef int (winapi * pfun) (int s, const char * Buf, int Len, int flags );
Pfun mysend, myrecv;

Typedef int (winapi * pfun2) (int s, char * Buf, int Len, int flags, int to, int tolen );
Pfun2 mysendto, myrecvfrom;
Void senddata (INT cmd, int Len, char * pbuffer, int sendorrecv );

Hinstance hws2_32;
Hwnd serverhwnd;

Bool apientry dllmain (handle hmodule,
DWORD ul_reason_for_call,
Lpvoid lpreserved
)
{
Switch (ul_reason_for_call)
{
Case dll_process_attach:
Hws2_32 = loadlibrary ("ws2_32.dll ");
Mysend = (pfun) getprocaddress (hws2_32, "send ");
Myrecv = (pfun) getprocaddress (hws2_32, "Recv ");
Mysendto = (pfun2) getprocaddress (hws2_32, "sendto ");
Myrecvfrom = (pfun2) getprocaddress (hws2_32, "recvfrom ");
Serverhwnd = findwindow ("tform1", "server ");
Break;
Case dll_process_detach:
Break;
Case dll_thread_attach:
Break;
Case dll_thread_detach:
Break;
}
Return true;
}

Extern "C" _ declspec (dllexport) int winapi send (int s, char * Buf, int Len, int flags)
{

Senddata (S, Len, Buf, 1 );
Return mysend (S, Buf, Len, flags );
}
Extern "C" _ declspec (dllexport) int winapi sendto (int s, char * Buf, int Len, int flags, int to, int tolen)
{
Senddata (S, Len, Buf, 1 );
Return mysendto (S, Buf, Len, flags, to, tolen );
}
Extern "C" _ declspec (dllexport) int winapi Recv (int s, char * Buf, int Len, int flags)
{
Int RT;
RT = myrecv (S, Buf, Len, flags );
Senddata (S, RT, Buf, 0 );
Return RT;
}
Extern "C" _ declspec (dllexport) int winapi recvfrom (int s, char * Buf, int Len, int flags, int from, int fromlen)
{
Int RT;
RT = myrecvfrom (S, Buf, Len, flags, from, fromlen );
Senddata (S, RT, Buf, 0 );
Return RT;
}
//------------------------------------------------
Void senddata (INT cmd, int Len, char * pbuffer, int sendorrecv)
{
Copydatastruct copydata;
Copydata. dwdata = cmd;
Copydata. cbdata = Len;
Copydata. lpdata = pbuffer;
If (: iswindow (serverhwnd ))
{
: Sendmessage (serverhwnd, wm_copydata, sendorrecv, (lparam) & copydata );
}
}
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