t7x/src/client/component/demonware.cpp

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#include <std_include.hpp>
#include "loader/component_loader.hpp"
#include <utils/hook.hpp>
#include <utils/thread.hpp>
#include "game/game.hpp"
#include "game/demonware/servers/lobby_server.hpp"
#include "game/demonware/servers/auth3_server.hpp"
#include "game/demonware/servers/stun_server.hpp"
#include "game/demonware/servers/umbrella_server.hpp"
#include "game/demonware/server_registry.hpp"
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#include "localized_strings.hpp"
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#define TCP_BLOCKING true
#define UDP_BLOCKING false
namespace demonware
{
namespace
{
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std::atomic_bool exit_server{false};
std::thread server_thread{};
utils::concurrency::container<std::unordered_map<SOCKET, bool>> blocking_sockets{};
utils::concurrency::container<std::unordered_map<SOCKET, tcp_server*>> socket_map{};
server_registry<tcp_server> tcp_servers{};
server_registry<udp_server> udp_servers{};
std::unordered_map<void*, void*> original_imports{};
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tcp_server* find_server(const SOCKET socket)
{
return socket_map.access<tcp_server*>([&](const std::unordered_map<SOCKET, tcp_server*>& map) -> tcp_server*
{
const auto entry = map.find(socket);
if (entry == map.end())
{
return nullptr;
}
return entry->second;
});
}
bool socket_link(const SOCKET socket, const uint32_t address)
{
auto* server = tcp_servers.find(address);
if (!server)
{
return false;
}
socket_map.access([&](std::unordered_map<SOCKET, tcp_server*>& map)
{
map[socket] = server;
});
return true;
}
void socket_unlink(const SOCKET socket)
{
socket_map.access([&](std::unordered_map<SOCKET, tcp_server*>& map)
{
const auto entry = map.find(socket);
if (entry != map.end())
{
map.erase(entry);
}
});
}
bool is_socket_blocking(const SOCKET socket, const bool def)
{
return blocking_sockets.access<bool>([&](std::unordered_map<SOCKET, bool>& map)
{
const auto entry = map.find(socket);
if (entry == map.end())
{
return def;
}
return entry->second;
});
}
void remove_blocking_socket(const SOCKET socket)
{
blocking_sockets.access([&](std::unordered_map<SOCKET, bool>& map)
{
const auto entry = map.find(socket);
if (entry != map.end())
{
map.erase(entry);
}
});
}
void add_blocking_socket(const SOCKET socket, const bool block)
{
blocking_sockets.access([&](std::unordered_map<SOCKET, bool>& map)
{
map[socket] = block;
});
}
void server_main()
{
exit_server = false;
while (!exit_server)
{
tcp_servers.frame();
udp_servers.frame();
std::this_thread::sleep_for(50ms);
}
}
namespace io
{
int getaddrinfo_stub(const char* name, const char* service,
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const addrinfo* hints, addrinfo** res)
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{
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#ifndef NDEBUG
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printf("[ network ]: [getaddrinfo]: \"%s\" \"%s\"\n", name, service);
#endif
base_server* server = tcp_servers.find(name);
if (!server)
{
server = udp_servers.find(name);
}
if (!server)
{
return getaddrinfo(name, service, hints, res);
}
const auto address = utils::memory::get_allocator()->allocate<sockaddr>();
const auto ai = utils::memory::get_allocator()->allocate<addrinfo>();
auto in_addr = reinterpret_cast<sockaddr_in*>(address);
in_addr->sin_addr.s_addr = server->get_address();
in_addr->sin_family = AF_INET;
ai->ai_family = AF_INET;
ai->ai_socktype = SOCK_STREAM;
ai->ai_addr = address;
ai->ai_addrlen = sizeof(sockaddr);
ai->ai_next = nullptr;
ai->ai_flags = 0;
ai->ai_protocol = 0;
ai->ai_canonname = const_cast<char*>(name);
*res = ai;
return 0;
}
void freeaddrinfo_stub(addrinfo* ai)
{
if (!utils::memory::get_allocator()->find(ai))
{
return freeaddrinfo(ai);
}
utils::memory::get_allocator()->free(ai->ai_addr);
utils::memory::get_allocator()->free(ai);
}
int getpeername_stub(const SOCKET s, sockaddr* addr, socklen_t* addrlen)
{
auto* server = find_server(s);
if (server)
{
auto in_addr = reinterpret_cast<sockaddr_in*>(addr);
in_addr->sin_addr.s_addr = server->get_address();
in_addr->sin_family = AF_INET;
*addrlen = sizeof(sockaddr);
return 0;
}
return getpeername(s, addr, addrlen);
}
int getsockname_stub(const SOCKET s, sockaddr* addr, socklen_t* addrlen)
{
auto* server = find_server(s);
if (server)
{
auto in_addr = reinterpret_cast<sockaddr_in*>(addr);
in_addr->sin_addr.s_addr = server->get_address();
in_addr->sin_family = AF_INET;
*addrlen = sizeof(sockaddr);
return 0;
}
return getsockname(s, addr, addrlen);
}
hostent* gethostbyname_stub(const char* name)
{
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#ifndef NDEBUG
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printf("[ network ]: [gethostbyname]: \"%s\"\n", name);
#endif
base_server* server = tcp_servers.find(name);
if (!server)
{
server = udp_servers.find(name);
}
if (!server)
{
#pragma warning(push)
#pragma warning(disable: 4996)
return gethostbyname(name);
#pragma warning(pop)
}
static thread_local in_addr address{};
address.s_addr = server->get_address();
static thread_local in_addr* addr_list[2]{};
addr_list[0] = &address;
addr_list[1] = nullptr;
static thread_local hostent host{};
host.h_name = const_cast<char*>(name);
host.h_aliases = nullptr;
host.h_addrtype = AF_INET;
host.h_length = sizeof(in_addr);
host.h_addr_list = reinterpret_cast<char**>(addr_list);
return &host;
}
int connect_stub(const SOCKET s, const struct sockaddr* addr, const int len)
{
if (len == sizeof(sockaddr_in))
{
const auto* in_addr = reinterpret_cast<const sockaddr_in*>(addr);
if (socket_link(s, in_addr->sin_addr.s_addr)) return 0;
}
return connect(s, addr, len);
}
int closesocket_stub(const SOCKET s)
{
remove_blocking_socket(s);
socket_unlink(s);
return closesocket(s);
}
int send_stub(const SOCKET s, const char* buf, const int len, const int flags)
{
auto* server = find_server(s);
if (server)
{
server->handle_input(buf, len);
return len;
}
return send(s, buf, len, flags);
}
int recv_stub(const SOCKET s, char* buf, const int len, const int flags)
{
auto* server = find_server(s);
if (server)
{
if (server->pending_data())
{
return static_cast<int>(server->handle_output(buf, len));
}
else
{
WSASetLastError(WSAEWOULDBLOCK);
return -1;
}
}
return recv(s, buf, len, flags);
}
int sendto_stub(const SOCKET s, const char* buf, const int len, const int flags, const sockaddr* to,
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const int tolen)
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{
const auto* in_addr = reinterpret_cast<const sockaddr_in*>(to);
auto* server = udp_servers.find(in_addr->sin_addr.s_addr);
if (server)
{
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server->handle_input(buf, len, {s, to, tolen});
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return len;
}
return sendto(s, buf, len, flags, to, tolen);
}
int recvfrom_stub(const SOCKET s, char* buf, const int len, const int flags, struct sockaddr* from,
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int* fromlen)
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{
// Not supported yet
if (is_socket_blocking(s, UDP_BLOCKING))
{
return recvfrom(s, buf, len, flags, from, fromlen);
}
size_t result = 0;
udp_servers.for_each([&](udp_server& server)
{
if (server.pending_data(s))
{
result = server.handle_output(
s, buf, static_cast<size_t>(len), from, fromlen);
}
});
if (result)
{
return static_cast<int>(result);
}
return recvfrom(s, buf, len, flags, from, fromlen);
}
int select_stub(const int nfds, fd_set* readfds, fd_set* writefds, fd_set* exceptfds,
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struct timeval* timeout)
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{
if (exit_server)
{
return select(nfds, readfds, writefds, exceptfds, timeout);
}
auto result = 0;
std::vector<SOCKET> read_sockets;
std::vector<SOCKET> write_sockets;
socket_map.access([&](std::unordered_map<SOCKET, tcp_server*>& sockets)
{
for (auto& s : sockets)
{
if (readfds)
{
if (FD_ISSET(s.first, readfds))
{
if (s.second->pending_data())
{
read_sockets.push_back(s.first);
FD_CLR(s.first, readfds);
}
}
}
if (writefds)
{
if (FD_ISSET(s.first, writefds))
{
write_sockets.push_back(s.first);
FD_CLR(s.first, writefds);
}
}
if (exceptfds)
{
if (FD_ISSET(s.first, exceptfds))
{
FD_CLR(s.first, exceptfds);
}
}
}
});
if ((!readfds || readfds->fd_count == 0) && (!writefds || writefds->fd_count == 0))
{
timeout->tv_sec = 0;
timeout->tv_usec = 0;
}
result = select(nfds, readfds, writefds, exceptfds, timeout);
if (result < 0) result = 0;
for (const auto& socket : read_sockets)
{
if (readfds)
{
FD_SET(socket, readfds);
result++;
}
}
for (const auto& socket : write_sockets)
{
if (writefds)
{
FD_SET(socket, writefds);
result++;
}
}
return result;
}
int ioctlsocket_stub(const SOCKET s, const long cmd, u_long* argp)
{
if (static_cast<unsigned long>(cmd) == (FIONBIO))
{
add_blocking_socket(s, *argp == 0);
}
return ioctlsocket(s, cmd, argp);
}
}
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void register_hook(const std::string& process, void* stub)
{
const utils::nt::library game_module{};
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std::optional<std::pair<void*, void*>> result{};
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if (!result) result = utils::hook::iat(game_module, "wsock32.dll", process, stub);
if (!result) result = utils::hook::iat(game_module, "WS2_32.dll", process, stub);
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if (!result)
{
throw std::runtime_error("Failed to hook: " + process);
}
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original_imports[result->first] = result->second;
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}
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const char* get_ffotd_name()
{
return "core_ffotd_tu32_593";
}
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}
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struct component final : generic_component
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{
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component()
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{
udp_servers.create<stun_server>("stun.us.demonware.net");
udp_servers.create<stun_server>("stun.eu.demonware.net");
udp_servers.create<stun_server>("stun.jp.demonware.net");
udp_servers.create<stun_server>("stun.au.demonware.net");
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tcp_servers.create<auth3_server>("ops3-pc-auth3.prod.demonware.net");
tcp_servers.create<lobby_server>("ops3-pc-lobby.prod.demonware.net");
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tcp_servers.create<umbrella_server>("prod.umbrella.demonware.net");
}
void post_load() override
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{
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register_hook("send", io::send_stub);
register_hook("recv", io::recv_stub);
register_hook("sendto", io::sendto_stub);
register_hook("recvfrom", io::recvfrom_stub);
register_hook("connect", io::connect_stub);
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register_hook("select", io::select_stub);
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register_hook("closesocket", io::closesocket_stub);
register_hook("ioctlsocket", io::ioctlsocket_stub);
register_hook("gethostbyname", io::gethostbyname_stub);
register_hook("getaddrinfo", io::getaddrinfo_stub);
register_hook("freeaddrinfo", io::freeaddrinfo_stub);
register_hook("getpeername", io::getpeername_stub);
register_hook("getsockname", io::getsockname_stub);
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}
void post_unpack() override
{
server_thread = utils::thread::create_named_thread("Demonware", server_main);
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utils::hook::set<uint8_t>(game::select(0x14293DC69, 0x1407D5879), 0x0); // CURLOPT_SSL_VERIFYPEER
utils::hook::set<uint8_t>(game::select(0x15C293850, 0x1407D5865), 0xAF); // CURLOPT_SSL_VERIFYHOST
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utils::hook::copy_string(game::select(0x1430B8670, 0x140EE4C68), "http://prod.umbrella.demonware.net");
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if (game::is_server())
{
return;
}
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utils::hook::copy_string(0x1430B8B70_g, "http://prod.uno.demonware.net/v1.0");
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utils::hook::set<uint8_t>(0x1430B87A0_g, 0x0); // HTTPS -> HTTP
utils::hook::copy_string(0x1430B8358_g, "http://%s:%d/auth/");
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utils::hook::set<uint32_t>(0x141EC4AC0_g, 0xC3D08948); // Skip publisher file signature stuff
utils::hook::call(0x141EC44FC_g, get_ffotd_name); // Return unlocalized ffotd name
utils::hook::set<uint64_t>(0x141F04500_g, 0xC300000001B8); // Kill LPC_File_SafeWrite
utils::hook::set<uint64_t>(0x141F03130_g, 0xC300000001B8); // Kill LPC_DeleteStale
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utils::hook::set<uint8_t>(0x141E0AA1B_g, 0xEB); // Release un-handled reportReward spamming loop
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localized_strings::override("MENU_CONNECTING_DW", "Emulating Online Service");
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}
void pre_destroy() override
{
exit_server = true;
if (server_thread.joinable())
{
server_thread.join();
}
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for (const auto& import : original_imports)
{
utils::hook::set(import.first, import.second);
}
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}
};
}
REGISTER_COMPONENT(demonware::component)