Per-Process packet capture

#include "main.h"

_send pSend;
_recv pRecv;
char logfile[MAX_PATH];

int WINAPI DllMain(HMODULE hModule, DWORD dwReason, LPVOID lpReserved)
{
    if (dwReason == DLL_PROCESS_ATTACH)
    {
        GetModuleFileNameA(NULL, logfile, MAX_PATH);
        lstrcatA(logfile, ".txt");
        MessageBoxA(0, logfile, "pp_capture.dll", 0);

        LogFile("DLL_PROCESS_ATTACH\n", 0);

        pSend = (_send)DetourFindFunction("ws2_32.dll", "send");
        pRecv = (_recv)DetourFindFunction("ws2_32.dll", "recv");

        DisableThreadLibraryCalls(hModule);

        DetourTransactionBegin();
        DetourUpdateThread(GetCurrentThread());
        DetourAttach(&(PVOID&)pSend, cSend);
        if (DetourTransactionCommit() == NO_ERROR)
            LogFile("send() detoured successfully\n", 0);

        DetourTransactionBegin();
        DetourUpdateThread(GetCurrentThread());
        DetourAttach(&(PVOID&)pRecv, cRecv);
        if (DetourTransactionCommit() == NO_ERROR)
            LogFile("recv() detoured successfully\n", 0);
    }
    else if (dwReason == DLL_PROCESS_DETACH)
    {
        LogFile("DLL_PROCESS_DETACH\n", 0);
        DetourTransactionBegin();
        DetourUpdateThread(GetCurrentThread());
        DetourDetach(&(PVOID&)pSend, cSend);
        if (DetourTransactionCommit() == NO_ERROR)
            LogFile("send() un-detoured successfully\n", 0);

        DetourTransactionBegin();
        DetourUpdateThread(GetCurrentThread());
        DetourDetach(&(PVOID&)pRecv, cRecv);
        if (DetourTransactionCommit() == NO_ERROR)
            LogFile("recv() un-detoured successfully\n", 0);
    }
}

int WINAPI cSend(SOCKET s, const char *buf, int len, int flags)
{
    LogFile("[SEND]", 6);
    LogFile((char*)buf, len);
    LogFile("\n", 1);
    return pSend(s, buf, len, flags);
}

int WINAPI cRecv(SOCKET s, char *buf, int len, int flags)
{
    LogFile("[RECV]", 6);
    LogFile(buf, len);
    LogFile("\n", 1);
    return pRecv(s, buf, len, flags);
}

void LogFile(char *str, int len)
{
    HANDLE file = CreateFileA(logfile, FILE_APPEND_DATA,
        FILE_SHARE_READ, 0, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
    if (file == INVALID_HANDLE_VALUE) return;
    DWORD dwBytesWritten;
    if (len == 0) len = lstrlenA(str);
    WriteFile(file, str, len, &dwBytesWritten, 0);
    CloseHandle(file);
}