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More networking progress

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This commit is contained in:
momo5502 2022-10-23 19:56:03 +02:00
parent 4fb26887ac
commit 250364903e
3 changed files with 142 additions and 52 deletions
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141
src/client/component/network.cpp
View File

@ -5,33 +5,57 @@
#include <utils/hook.hpp>
#include "utils/string.hpp"
namespace network
{
namespace
{
int net_compare_base_address(const game::netadr_t* a1, const game::netadr_t* a2)
{
if (a1->type == a2->type)
{
switch (a1->type)
{
case game::netadrtype_t::NA_BOT:
case game::netadrtype_t::NA_LOOPBACK:
return a1->port == a2->port;
using callback = std::function<void(const game::netadr_t&, const std::basic_string_view<uint8_t>&)>;
case game::netadrtype_t::NA_IP:
return memcmp(&a1->ipv4.a, &a2->ipv4.a, 4) == 0;
default:
break;
}
std::unordered_map<std::string, callback>& get_callbacks()
{
static std::unordered_map<std::string, callback> callbacks{};
return callbacks;
}
bool handle_command(game::netadr_t* address, const char* command, const game::msg_t* message)
{
/*const auto cmd_string = utils::string::to_lower(command);
auto& callbacks = get_callbacks();
const auto handler = callbacks.find(cmd_string);
const auto offset = cmd_string.size() + 5;
if (message->cursize < offset || handler == callbacks.end())
{
return false;
}
const std::basic_string_view data(message->data + offset, message->cursize - offset);
handler->second(*address, data);
return true;*/
OutputDebugStringA(command);
return false;
}
int net_compare_address(const game::netadr_t* a1, const game::netadr_t* a2)
void handle_command_stub(utils::hook::assembler& a)
{
return net_compare_base_address(a1, a2) && a1->port == a2->port;
a.pushad64();
a.mov(r8, r12);
a.mov(rdx, rcx); // command
a.lea(rcx, qword_ptr(rsp, 0x30 + 0x80)); // address
a.call_aligned(handle_command);
a.movzx(rax, al);
a.mov(qword_ptr(rsp, 0x78), rax);
a.popad64();
a.jmp(0x14134D14B_g);
}
}
@ -43,52 +67,65 @@ namespace network
// redirect dw_sendto to raw socket
utils::hook::jump(0x14233307E_g, 0x1423330C7_g);
utils::hook::nop(0x142333056_g, 5); // don't add sock to packet
utils::hook::set<uint8_t>(0x14233305E_g, 0); // don't add checksum to packet
utils::hook::set<uint8_t>(0x142332E55_g, 0); // clear local net id
utils::hook::jump(0x142332E72_g, 0x142332E8E_g); // skip checksum parsing
// intercept command handling
/*utils::hook::jump(0x14020A175, utils::hook::assemble(handle_command_stub), true);
utils::hook::jump(0x14134D146_g, utils::hook::assemble(handle_command_stub));
// handle xuid without secure connection
utils::hook::nop(0x14043FFF8, 6);
/*std::thread([]
{
while (true)
{
{
MessageBoxA(0, 0, 0, 0);
utils::hook::jump(0x1403DA700, net_compare_address);
utils::hook::jump(0x1403DA750, net_compare_base_address);
static auto& ip_socket = *(SOCKET*)0x157E77818_g;
if (!ip_socket)
{
ip_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
// don't establish secure conenction
utils::hook::set<uint8_t>(0x140232BBD, 0xEB);
utils::hook::set<uint8_t>(0x140232C9A, 0xEB);
utils::hook::set<uint8_t>(0x140232F8D, 0xEB);
utils::hook::set<uint8_t>(0x14020862F, 0xEB);
const auto address = htonl(INADDR_ANY);
const auto port = htons(28960);
// ignore unregistered connection
utils::hook::jump(0x140439EA9, reinterpret_cast<void*>(0x140439E28));
utils::hook::set<uint8_t>(0x140439E9E, 0xEB);
sockaddr_in server_addr{};
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = address;
server_addr.sin_port = port;
// disable xuid verification
utils::hook::set<uint8_t>(0x140022319, 0xEB);
utils::hook::set<uint8_t>(0x140022334, 0xEB);
if (bind(ip_socket, reinterpret_cast<sockaddr*>(&server_addr), sizeof(server_addr)) ==
SOCKET_ERROR)
{
throw std::runtime_error("Failed to bind socket");
}
}
// disable xuid verification
utils::hook::nop(0x14043CC4C, 2);
utils::hook::set<uint8_t>(0x14043CCA8, 0xEB);
std::string data = utils::string::va("\xFF\xFF\xFF\xFF" "getservers S1 %i full empty", 1);
// ignore configstring mismatch
utils::hook::set<uint8_t>(0x140211610, 0xEB);
game::netadr_t addr{};
addr.type = game::NA_RAWIP;
addr.port = 20810;
*(unsigned long*)&addr.ipv4.a = inet_addr("116.203.183.23");
addr.localNetID = game::NS_CLIENT1;
game::NET_SendPacket(game::NS_CLIENT1, (int)data.size(), data.data(), &addr);
}
}
}).detach();*/
}
// ignore dw handle in SV_PacketEvent
utils::hook::set<uint8_t>(0x140442F6D, 0xEB);
utils::hook::call(0x140442F61, &net_compare_address);
// ignore dw handle in SV_FindClientByAddress
utils::hook::set<uint8_t>(0x14044256D, 0xEB);
utils::hook::call(0x140442561, &net_compare_address);
// ignore dw handle in SV_DirectConnect
utils::hook::set<uint8_t>(0x140439BA8, 0xEB);
utils::hook::set<uint8_t>(0x140439DA5, 0xEB);
utils::hook::call(0x140439B9B, &net_compare_address);
utils::hook::call(0x140439D98, &net_compare_address);
*/
void pre_destroy() override
{
static auto& ip_socket = *(SOCKET*)0x157E77818_g;
if (ip_socket)
{
closesocket(ip_socket);
ip_socket = 0;
}
}
};
}
//REGISTER_COMPONENT(network::component)
REGISTER_COMPONENT(network::component)

51
src/client/game/structs.hpp
View File

@ -491,6 +491,57 @@ namespace game
netsrc_t localNetID;
};
typedef int qboolean;
enum PacketModeList
{
PACKETDATA_FIRST = 0x0,
PACKETDATA_UNDEFINED = 0x0,
PACKETDATA_HEADER = 0x1,
PACKETDATA_OVERHEAD = 0x2,
PACKETDATA_DATA = 0x3,
PACKETDATA_RELIABLEDATA = 0x4,
PACKETDATA_ZEROFLOAT = 0x5,
PACKETDATA_SMALLFLOAT = 0x6,
PACKETDATA_LARGEFLOAT = 0x7,
PACKETDATA_ZEROINT = 0x8,
PACKETDATA_SMALLANGLE = 0x9,
PACKETDATA_ZEROANGLE = 0xA,
PACKETDATA_TIMEDELTA = 0xB,
PACKETDATA_TIME = 0xC,
PACKETDATA_24BITFLAGINDEX = 0xD,
PACKETDATA_GROUNDENTITY = 0xE,
PACKETDATA_ENTITYNUM = 0xF,
PACKETDATA_LASTFIELDCHANGED = 0x10,
PACKETDATA_NOTNETWORKDATA = 0x11,
PACKETDATA_ORIGINDELTA = 0x12,
PACKETDATA_ORIGIN = 0x13,
NUM_PACKETDATA_MODES = 0x14,
};
struct PacketMode
{
unsigned int start;
PacketModeList mode;
};
struct msg_t
{
qboolean overflowed;
qboolean readOnly;
byte* data;
byte* splitData;
int maxsize;
int cursize;
int splitSize;
int readcount;
int bit;
int lastEntityRef;
qboolean flush;
netsrc_t targetLocalNetID;
//PacketMode analysis;
};
#ifdef __cplusplus
}
#endif

2
src/client/game/symbols.hpp
View File

@ -22,6 +22,8 @@ namespace game
// Live
WEAK symbol<bool(uint64_t, int*, bool)> Live_GetConnectivityInformation{0x141E0C410_g};
// NET
WEAK symbol<bool(netsrc_t sock, int length, const void* data, netadr_t* to)> NET_SendPacket{0x142332F70_g};
// Sys
WEAK symbol<void()> Sys_ShowConsole{0x142333F80_g};
WEAK symbol<TLSData*()> Sys_GetTLS{0x142184210_g};