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MySampleShellCode.cpp
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140 lines (122 loc) · 3.97 KB
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#include "stdafx.h"
#include "MySampleShellCode.h"
CMySampleShellCode::CMySampleShellCode()
{
char szWs2_32Dll[] = { 'W', 's', '2', '_', '3', '2', '.', 'd', 'l', 'l', 0 };
char szWSAStartup[] = { 'W', 'S', 'A', 'S', 't', 'a', 'r', 't', 'u', 'p', 0 };
char szWSACleanup[] = { 'W', 'S', 'A', 'C', 'l', 'e', 'a', 'n', 'u', 'p', 0 };
char szGetaddrinfo[] = { 'g', 'e', 't', 'a', 'd', 'd', 'r', 'i', 'n', 'f', 'o', 0 };
char szFreeaddrinfo[] = { 'f', 'r', 'e', 'e', 'a', 'd', 'd', 'r', 'i', 'n', 'f', 'o', 0 };
char szSocket[] = { 's', 'o', 'c', 'k', 'e', 't', 0 };
char szClosesocket[] = { 'c', 'l', 'o', 's', 'e', 's', 'o', 'c', 'k', 'e', 't', 0 };
char szBind[] = { 'b', 'i', 'n', 'd', 0 };
char szListen[] = { 'l', 'i', 's', 't', 'e', 'n', 0 };
char szAccept[] = { 'a', 'c', 'c', 'e', 'p', 't', 0 };
char szSend[] = { 's', 'e', 'n', 'd', 0 };
char szRecv[] = { 'r', 'e', 'c', 'v', 0 };
char szShutdown[] = { 's', 'h', 'u', 't', 'd', 'o', 'w', 'n', 0 };
WSAStartup = (WSASTARTUP)GetAPIAddress(szWs2_32Dll, szWSAStartup);
WSACleanup = (WSAClEANUP)GetAPIAddress(szWs2_32Dll, szWSACleanup);
getaddrinfo = (GETADDRINFO)GetAPIAddress(szWs2_32Dll, szGetaddrinfo);
freeaddrinfo = (FREEADDRINFO)GetAPIAddress(szWs2_32Dll, szFreeaddrinfo);
socket = (_SOCKET)GetAPIAddress(szWs2_32Dll, szSocket);
closesocket = (CLOSESOCKET)GetAPIAddress(szWs2_32Dll, szClosesocket);
bind = (BIND)GetAPIAddress(szWs2_32Dll, szBind);
listen = (LISTEN)GetAPIAddress(szWs2_32Dll, szListen);
accept = (ACCEPT)GetAPIAddress(szWs2_32Dll, szAccept);
send = (SEND)GetAPIAddress(szWs2_32Dll, szSend);
recv = (RECV)GetAPIAddress(szWs2_32Dll, szRecv);
shutdown = (SHUTDOWN)GetAPIAddress(szWs2_32Dll, szShutdown);
}
CMySampleShellCode::~CMySampleShellCode()
{
}
void CMySampleShellCode::Run()
{
int iResult = 0;
WSADATA WsaData;
struct addrinfo *result = nullptr, *ptr = nullptr, hints;
char szDeafultPort[] = { '5', '5', '5', '5', 0 };
SOCKET ListenSocket = INVALID_SOCKET;
SOCKET ClientSocket = INVALID_SOCKET;
bool bWsaStartupOk = false;
bool bGetAddrInfoOk = false;
const int DEFAULT_BUFLEN = 512;
char recvbuf[DEFAULT_BUFLEN];
int iSendResult;
int recvbuflen = DEFAULT_BUFLEN;
iResult = WSAStartup(MAKEWORD(2, 2), &WsaData);
if (iResult != 0)
{
goto _exit;
}
else
{
bWsaStartupOk = true;
}
memset(&hints, 0, sizeof(addrinfo));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_PASSIVE;
iResult = getaddrinfo(nullptr, szDeafultPort, &hints, &result);
if (iResult != 0)
{
goto _exit;
}
else
{
bGetAddrInfoOk = true;
}
ListenSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (ListenSocket == INVALID_SOCKET)
{
goto _exit;
}
iResult = bind(ListenSocket, result->ai_addr, (int)result->ai_addrlen);
if (iResult != 0)
{
goto _exit;
}
if (listen(ListenSocket, SOMAXCONN) == SOCKET_ERROR)
{
goto _exit;
}
while (1)
{
ClientSocket = accept(ListenSocket, nullptr, nullptr);
if (ClientSocket == INVALID_SOCKET)
{
break;
}
do {
iResult = recv(ClientSocket, recvbuf, recvbuflen, 0);
if (iResult > 0) {
iSendResult = send(ClientSocket, recvbuf, iResult, 0);
if (iSendResult == SOCKET_ERROR) {
break;
}
}
else
{
break;
}
} while (iResult > 0);
shutdown(ClientSocket, SD_SEND);
closesocket(ClientSocket);
}
_exit:
if (bGetAddrInfoOk)
{
freeaddrinfo(result);
}
if (ListenSocket != INVALID_SOCKET)
{
closesocket(ListenSocket);
}
if (bWsaStartupOk)
{
WSACleanup();
}
return;
}