mirror of
https://github.com/netchx/netch.git
synced 2026-03-14 17:43:18 +08:00
368 lines
8.3 KiB
C++
368 lines
8.3 KiB
C++
#include "EventHandler.h"
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#include "DNSHandler.h"
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#include "TCPHandler.h"
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extern bool filterTCP;
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extern bool filterUDP;
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extern bool filterDNS;
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extern vector<wstring> bypassList;
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extern vector<wstring> handleList;
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extern USHORT tcpListen;
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mutex udpContextLock;
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map<ENDPOINT_ID, SocksHelper::PUDP> udpContext;
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wstring ConvertIP(PSOCKADDR addr)
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{
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WCHAR buffer[MAX_PATH] = L"";
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DWORD bufferLength = MAX_PATH;
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if (addr->sa_family == AF_INET)
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{
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WSAAddressToStringW(addr, sizeof(SOCKADDR_IN), NULL, buffer, &bufferLength);
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}
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else
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{
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WSAAddressToStringW(addr, sizeof(SOCKADDR_IN6), NULL, buffer, &bufferLength);
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}
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return buffer;
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}
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wstring GetProcessName(DWORD id)
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{
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if (id == 0)
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{
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return L"Idle";
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}
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if (id == 4)
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{
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return L"System";
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}
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wchar_t name[MAX_PATH];
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if (!nf_getProcessNameFromKernel(id, name, MAX_PATH))
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{
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if (!nf_getProcessNameW(id, name, MAX_PATH))
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{
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return L"Unknown";
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}
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}
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wchar_t data[MAX_PATH];
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if (GetLongPathNameW(name, data, MAX_PATH))
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{
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return data;
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}
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return name;
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}
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bool checkBypassName(DWORD id)
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{
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auto name = GetProcessName(id);
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for (size_t i = 0; i < bypassList.size(); i++)
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{
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if (regex_search(name, wregex(bypassList[i])))
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{
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return true;
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}
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}
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return false;
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}
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bool checkHandleName(DWORD id)
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{
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auto name = GetProcessName(id);
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for (size_t i = 0; i < handleList.size(); i++)
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{
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if (regex_search(name, wregex(handleList[i])))
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{
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return true;
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}
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}
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return false;
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}
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bool eh_init()
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{
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return TCPHandler::Init();
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}
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void eh_free()
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{
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TCPHandler::Free();
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}
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void threadStart()
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{
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}
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void threadEnd()
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{
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}
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void tcpConnectRequest(ENDPOINT_ID id, PNF_TCP_CONN_INFO info)
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{
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if (!filterTCP)
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{
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nf_tcpDisableFiltering(id);
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wcout << "[Redirector][EventHandler][tcpConnectRequest][" << id << "][" << info->processId << "][!filterTCP] " << GetProcessName(info->processId) << endl;
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return;
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}
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if (checkBypassName(info->processId))
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{
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nf_tcpDisableFiltering(id);
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wcout << "[Redirector][EventHandler][tcpConnectRequest][" << id << "][" << info->processId << "][checkBypassName] " << GetProcessName(info->processId) << endl;
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return;
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}
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if (!checkHandleName(info->processId))
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{
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nf_tcpDisableFiltering(id);
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wcout << "[Redirector][EventHandler][tcpConnectRequest][" << id << "][" << info->processId << "][!checkHandleName] " << GetProcessName(info->processId) << endl;
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return;
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}
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if (info->ip_family != AF_INET && info->ip_family != AF_INET6)
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{
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nf_tcpDisableFiltering(id);
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wcout << "[Redirector][EventHandler][tcpConnectRequest][" << id << "][" << info->processId << "][!IPv4 && !IPv6] " << GetProcessName(info->processId) << endl;
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return;
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}
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SOCKADDR_IN6 client;
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memcpy(&client, info->localAddress, sizeof(SOCKADDR_IN6));
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SOCKADDR_IN6 remote;
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memcpy(&remote, info->remoteAddress, sizeof(SOCKADDR_IN6));
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if (info->ip_family == AF_INET)
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{
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auto addr = (PSOCKADDR_IN)info->remoteAddress;
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addr->sin_family = AF_INET;
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addr->sin_addr.S_un.S_addr = htonl(INADDR_LOOPBACK);
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addr->sin_port = tcpListen;
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}
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if (info->ip_family == AF_INET6)
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{
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auto addr = (PSOCKADDR_IN6)info->remoteAddress;
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IN6ADDR_SETLOOPBACK(addr);
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addr->sin6_port = tcpListen;
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}
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TCPHandler::CreateHandler(client, remote);
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wcout << "[Redirector][EventHandler][tcpConnectRequest][" << id << "][" << info->processId << "] " << ConvertIP((PSOCKADDR)&client) << " -> " << ConvertIP((PSOCKADDR)&remote) << endl;
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}
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void tcpConnected(ENDPOINT_ID id, PNF_TCP_CONN_INFO info)
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{
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wcout << "[Redirector][EventHandler][tcpConnected][" << id << "][" << info->processId << "][" << ConvertIP((PSOCKADDR)info->remoteAddress) << "] " << GetProcessName(info->processId) << endl;
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}
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void tcpCanSend(ENDPOINT_ID id)
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{
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UNREFERENCED_PARAMETER(id);
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}
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void tcpSend(ENDPOINT_ID id, const char* buffer, int length)
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{
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nf_tcpPostSend(id, buffer, length);
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}
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void tcpCanReceive(ENDPOINT_ID id)
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{
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UNREFERENCED_PARAMETER(id);
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}
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void tcpReceive(ENDPOINT_ID id, const char* buffer, int length)
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{
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nf_tcpPostReceive(id, buffer, length);
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}
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void tcpClosed(ENDPOINT_ID id, PNF_TCP_CONN_INFO info)
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{
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SOCKADDR_IN6 client;
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memcpy(&client, info->localAddress, sizeof(SOCKADDR_IN6));
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TCPHandler::DeleteHandler(client);
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printf("[Redirector][EventHandler][tcpClosed][%llu][%lu]\n", id, info->processId);
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}
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void udpCreated(ENDPOINT_ID id, PNF_UDP_CONN_INFO info)
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{
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if (!filterUDP)
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{
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wcout << "[Redirector][EventHandler][udpCreated][" << id << "][" << info->processId << "][!filterUDP] " << GetProcessName(info->processId) << endl;
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return;
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}
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if (checkBypassName(info->processId))
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{
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wcout << "[Redirector][EventHandler][udpCreated][" << id << "][" << info->processId << "][checkBypassName] " << GetProcessName(info->processId) << endl;
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return;
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}
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if (!checkHandleName(info->processId))
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{
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wcout << "[Redirector][EventHandler][udpCreated][" << id << "][" << info->processId << "][!checkHandleName] " << GetProcessName(info->processId) << endl;
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return;
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}
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lock_guard<mutex> lg(udpContextLock);
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udpContext[id] = new SocksHelper::UDP();
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}
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void udpConnectRequest(ENDPOINT_ID id, PNF_UDP_CONN_REQUEST info)
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{
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UNREFERENCED_PARAMETER(id);
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UNREFERENCED_PARAMETER(info);
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}
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void udpCanSend(ENDPOINT_ID id)
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{
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UNREFERENCED_PARAMETER(id);
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}
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void udpSend(ENDPOINT_ID id, const unsigned char* target, const char* buffer, int length, PNF_UDP_OPTIONS options)
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{
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if (filterDNS && DNSHandler::IsDNS((PSOCKADDR_IN6)target))
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{
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DNSHandler::CreateHandler(id, (PSOCKADDR_IN6)target, buffer, length, options);
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return;
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}
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udpContextLock.lock();
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if (udpContext.find(id) == udpContext.end())
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{
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udpContextLock.unlock();
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nf_udpPostSend(id, target, buffer, length, options);
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return;
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}
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auto conn = udpContext[id];
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udpContextLock.unlock();
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if (conn->tcpSocket == INVALID_SOCKET)
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{
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auto tcpSocket = SocksHelper::Utils::Connect();
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if (tcpSocket == INVALID_SOCKET)
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{
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printf("[Redirector][EventHandler][udpSend][%llu] Connect to remote server failed\n", id);
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return;
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}
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if (!SocksHelper::Utils::Handshake(tcpSocket))
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{
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closesocket(tcpSocket);
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printf("[Redirector][EventHandler][udpSend][%llu] Handshake failed\n", id);
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return;
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}
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conn->tcpSocket = tcpSocket;
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}
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if (conn->udpSocket == INVALID_SOCKET)
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{
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if (!conn->Associate())
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{
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closesocket(conn->tcpSocket);
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conn->tcpSocket = INVALID_SOCKET;
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printf("[Redirector][EventHandler][udpSend][%llu] UDP Associate failed\n", id);
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return;
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}
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if (!conn->CreateUDP())
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{
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closesocket(conn->tcpSocket);
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conn->tcpSocket = INVALID_SOCKET;
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printf("[Redirector][EventHandler][udpSend][%llu] Create UDP socket failed\n", id);
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return;
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}
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auto data = (PNF_UDP_OPTIONS)new char[sizeof(NF_UDP_OPTIONS) + options->optionsLength];
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memcpy(data, options, sizeof(NF_UDP_OPTIONS) + options->optionsLength - 1);
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thread(udpBeginReceive, id, conn, data).detach();
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}
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if (conn->Send((PSOCKADDR_IN6)target, buffer, length) == SOCKET_ERROR)
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{
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closesocket(conn->tcpSocket);
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closesocket(conn->udpSocket);
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conn->tcpSocket = INVALID_SOCKET;
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conn->udpSocket = INVALID_SOCKET;
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printf("[Redirector][EventHandler][udpSend][%llu] Send data failed\n", id);
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return;
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}
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}
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void udpCanReceive(ENDPOINT_ID id)
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{
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UNREFERENCED_PARAMETER(id);
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}
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void udpReceive(ENDPOINT_ID id, const unsigned char* target, const char* buffer, int length, PNF_UDP_OPTIONS options)
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{
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nf_udpPostReceive(id, target, buffer, length, options);
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}
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void udpClosed(ENDPOINT_ID id, PNF_UDP_CONN_INFO info)
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{
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UNREFERENCED_PARAMETER(info);
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printf("[Redirector][EventHandler][udpClosed][%llu]\n", id);
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lock_guard<mutex> lg(udpContextLock);
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if (udpContext.find(id) != udpContext.end())
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{
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delete udpContext[id];
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udpContext.erase(id);
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}
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}
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void udpBeginReceive(ENDPOINT_ID id, SocksHelper::PUDP conn, PNF_UDP_OPTIONS data)
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{
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char buffer[1458];
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while (conn->udpSocket != INVALID_SOCKET)
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{
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SOCKADDR_IN6 target;
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int length = conn->Read(&target, buffer, 1458);
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if (length == 0 || length == SOCKET_ERROR)
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{
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break;
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}
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nf_udpPostReceive(id, (unsigned char*)&target, buffer, length, data);
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}
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delete data;
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}
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