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SAMPRakNet.cpp
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SAMPRakNet.cpp
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#include "SAMPRakNet.hpp"
#include <climits>
#include <cstring>
#include <string>
#include <vector>
#include <RakPeer.h>
#include <SocketLayer.h>
#include <PacketEnumerations.h>
uint8_t SAMPRakNet::buffer_[MAXIMUM_MTU_SIZE];
uint32_t SAMPRakNet::token_;
uint16_t SAMPRakNet::portNumber = 7777;
Query* SAMPRakNet::query_ = nullptr;
unsigned int SAMPRakNet::timeout_ = 10000;
unsigned int SAMPRakNet::minConnectionTime_ = 0;
unsigned int SAMPRakNet::messagesLimit_ = 500;
unsigned int SAMPRakNet::messageHoleLimit_ = 3000;
unsigned int SAMPRakNet::acksLimit_ = 3000;
unsigned int SAMPRakNet::networkLimitsBanTime_ = 60000;
bool SAMPRakNet::logCookies_ = false;
ICore* SAMPRakNet::core_ = nullptr;
FlatHashSet<uint32_t> SAMPRakNet::incomingConnections_;
RakNet::RakNetTime SAMPRakNet::gracePeriod_ = 0;
uint16_t
SAMPRakNet::
GetPort()
{
return portNumber;
}
void SAMPRakNet::
SetPort(uint16_t value)
{
portNumber = value;
}
uint8_t*
SAMPRakNet::
Decrypt(uint8_t const* src, int len)
{
static const uint8_t
key[256]
= {
0xB4,
0x62,
0x07,
0xE5,
0x9D,
0xAF,
0x63,
0xDD,
0xE3,
0xD0,
0xCC,
0xFE,
0xDC,
0xDB,
0x6B,
0x2E,
0x6A,
0x40,
0xAB,
0x47,
0xC9,
0xD1,
0x53,
0xD5,
0x20,
0x91,
0xA5,
0x0E,
0x4A,
0xDF,
0x18,
0x89,
0xFD,
0x6F,
0x25,
0x12,
0xB7,
0x13,
0x77,
0x00,
0x65,
0x36,
0x6D,
0x49,
0xEC,
0x57,
0x2A,
0xA9,
0x11,
0x5F,
0xFA,
0x78,
0x95,
0xA4,
0xBD,
0x1E,
0xD9,
0x79,
0x44,
0xCD,
0xDE,
0x81,
0xEB,
0x09,
0x3E,
0xF6,
0xEE,
0xDA,
0x7F,
0xA3,
0x1A,
0xA7,
0x2D,
0xA6,
0xAD,
0xC1,
0x46,
0x93,
0xD2,
0x1B,
0x9C,
0xAA,
0xD7,
0x4E,
0x4B,
0x4D,
0x4C,
0xF3,
0xB8,
0x34,
0xC0,
0xCA,
0x88,
0xF4,
0x94,
0xCB,
0x04,
0x39,
0x30,
0x82,
0xD6,
0x73,
0xB0,
0xBF,
0x22,
0x01,
0x41,
0x6E,
0x48,
0x2C,
0xA8,
0x75,
0xB1,
0x0A,
0xAE,
0x9F,
0x27,
0x80,
0x10,
0xCE,
0xF0,
0x29,
0x28,
0x85,
0x0D,
0x05,
0xF7,
0x35,
0xBB,
0xBC,
0x15,
0x06,
0xF5,
0x60,
0x71,
0x03,
0x1F,
0xEA,
0x5A,
0x33,
0x92,
0x8D,
0xE7,
0x90,
0x5B,
0xE9,
0xCF,
0x9E,
0xD3,
0x5D,
0xED,
0x31,
0x1C,
0x0B,
0x52,
0x16,
0x51,
0x0F,
0x86,
0xC5,
0x68,
0x9B,
0x21,
0x0C,
0x8B,
0x42,
0x87,
0xFF,
0x4F,
0xBE,
0xC8,
0xE8,
0xC7,
0xD4,
0x7A,
0xE0,
0x55,
0x2F,
0x8A,
0x8E,
0xBA,
0x98,
0x37,
0xE4,
0xB2,
0x38,
0xA1,
0xB6,
0x32,
0x83,
0x3A,
0x7B,
0x84,
0x3C,
0x61,
0xFB,
0x8C,
0x14,
0x3D,
0x43,
0x3B,
0x1D,
0xC3,
0xA2,
0x96,
0xB3,
0xF8,
0xC4,
0xF2,
0x26,
0x2B,
0xD8,
0x7C,
0xFC,
0x23,
0x24,
0x66,
0xEF,
0x69,
0x64,
0x50,
0x54,
0x59,
0xF1,
0xA0,
0x74,
0xAC,
0xC6,
0x7D,
0xB5,
0xE6,
0xE2,
0xC2,
0x7E,
0x67,
0x17,
0x5E,
0xE1,
0xB9,
0x3F,
0x6C,
0x70,
0x08,
0x99,
0x45,
0x56,
0x76,
0xF9,
0x9A,
0x97,
0x19,
0x72,
0x5C,
0x02,
0x8F,
0x58,
};
uint8_t
cur,
checksum = 0,
port = GetPort() ^ 0xCC;
for (int i = 1; i != len; ++i) {
// Alternate the mask every byte.
cur = (uint8_t)src[i];
if (!(i & 1))
cur ^= port;
cur = key[cur];
checksum ^= cur & 0xAA;
buffer_[i - 1] = cur;
}
if (src[0] != checksum) {
return nullptr;
}
return buffer_;
}
uint8_t*
SAMPRakNet::
Encrypt(uint8_t const* src, int len)
{
static const uint8_t
key[256]
= {
0x27,
0x69,
0xFD,
0x87,
0x60,
0x7D,
0x83,
0x02,
0xF2,
0x3F,
0x71,
0x99,
0xA3,
0x7C,
0x1B,
0x9D,
0x76,
0x30,
0x23,
0x25,
0xC5,
0x82,
0x9B,
0xEB,
0x1E,
0xFA,
0x46,
0x4F,
0x98,
0xC9,
0x37,
0x88,
0x18,
0xA2,
0x68,
0xD6,
0xD7,
0x22,
0xD1,
0x74,
0x7A,
0x79,
0x2E,
0xD2,
0x6D,
0x48,
0x0F,
0xB1,
0x62,
0x97,
0xBC,
0x8B,
0x59,
0x7F,
0x29,
0xB6,
0xB9,
0x61,
0xBE,
0xC8,
0xC1,
0xC6,
0x40,
0xEF,
0x11,
0x6A,
0xA5,
0xC7,
0x3A,
0xF4,
0x4C,
0x13,
0x6C,
0x2B,
0x1C,
0x54,
0x56,
0x55,
0x53,
0xA8,
0xDC,
0x9C,
0x9A,
0x16,
0xDD,
0xB0,
0xF5,
0x2D,
0xFF,
0xDE,
0x8A,
0x90,
0xFC,
0x95,
0xEC,
0x31,
0x85,
0xC2,
0x01,
0x06,
0xDB,
0x28,
0xD8,
0xEA,
0xA0,
0xDA,
0x10,
0x0E,
0xF0,
0x2A,
0x6B,
0x21,
0xF1,
0x86,
0xFB,
0x65,
0xE1,
0x6F,
0xF6,
0x26,
0x33,
0x39,
0xAE,
0xBF,
0xD4,
0xE4,
0xE9,
0x44,
0x75,
0x3D,
0x63,
0xBD,
0xC0,
0x7B,
0x9E,
0xA6,
0x5C,
0x1F,
0xB2,
0xA4,
0xC4,
0x8D,
0xB3,
0xFE,
0x8F,
0x19,
0x8C,
0x4D,
0x5E,
0x34,
0xCC,
0xF9,
0xB5,
0xF3,
0xF8,
0xA1,
0x50,
0x04,
0x93,
0x73,
0xE0,
0xBA,
0xCB,
0x45,
0x35,
0x1A,
0x49,
0x47,
0x6E,
0x2F,
0x51,
0x12,
0xE2,
0x4A,
0x72,
0x05,
0x66,
0x70,
0xB8,
0xCD,
0x00,
0xE5,
0xBB,
0x24,
0x58,
0xEE,
0xB4,
0x80,
0x81,
0x36,
0xA9,
0x67,
0x5A,
0x4B,
0xE8,
0xCA,
0xCF,
0x9F,
0xE3,
0xAC,
0xAA,
0x14,
0x5B,
0x5F,
0x0A,
0x3B,
0x77,
0x92,
0x09,
0x15,
0x4E,
0x94,
0xAD,
0x17,
0x64,
0x52,
0xD3,
0x38,
0x43,
0x0D,
0x0C,
0x07,
0x3C,
0x1D,
0xAF,
0xED,
0xE7,
0x08,
0xB7,
0x03,
0xE6,
0x8E,
0xAB,
0x91,
0x89,
0x3E,
0x2C,
0x96,
0x42,
0xD9,
0x78,
0xDF,
0xD0,
0x57,
0x5D,
0x84,
0x41,
0x7E,
0xCE,
0xF7,
0x32,
0xC3,
0xD5,
0x20,
0x0B,
0xA7,
};
uint8_t
cur,
checksum = 0,
port = GetPort() ^ 0xCC;
for (int i = 0; i != len; ++i) {
// Alternate the mask every byte.
cur = (uint8_t)src[i];
checksum ^= cur & 0xAA;
if (i & 1)
cur ^= port;
cur = key[cur];
buffer_[i + 1] = cur;
}
buffer_[0] = checksum;
return buffer_;
}
void SAMPRakNet::
HandleQuery(SOCKET instance, int outsize, const sockaddr_in& client, char const* buf, int insize)
{
if (query_ == nullptr) {
return;
}
Span<const char> output = query_->handleQuery(
Span<const char>(buf, insize),
instance,
client,
outsize);
if (output.data()) {
sendto(instance, output.data(), output.size(), 0, reinterpret_cast<const sockaddr*>(&client), outsize);
}
}
struct AuthEntry {
StringView send;
StringView recv;
} static const AuthTable[UCHAR_MAX + 1] = {
{ "6C407EC29DE59E2", "D9412F235647BAA582089C6F66817F8B8811C057" },
{ "277C2AD934406F33", "132770E4744F6E78F2CBB4D3F3638EC05D7EA79D" },
{ "3A968DE22423B39", "D1080D41AD614649282887E4001C93AAEDBCA570" },
{ "479E294F68A7AB7", "D2A4C61BB6D9FAB47FF4732B70497FAD91BB7FC2" },
{ "583C3D05A2A3CCA", "CD8856BDA216335F3D275587E57D75E62FC8ED3A" },
{ "70A2762B77CD22CC", "B028F73A7B37AB5EF9B990ECA397C78841B7A086" },
{ "4EBF34953B6E1779", "45AB65DF7D64D902A3B130CEA3F9529AC4F260B6" },
{ "29B6F33709B1150", "180ED6A653ECBB56A5DC9DD5E4FD862FEE792990" },
{ "58E30DCFA7343C", "4E50D5C757887821522338185A32DC1A2B263D5E" },
{ "6F2B3B214EFD2674", "6C3F004F320AE3B70FA8BAB7EEB8D66A176497F6" },
{ "347D638A5EB52CA0", "50E366B9D4EF5EFDBFD7BC128FE9F339B19CB873" },
{ "6CF77623265513D", "EBBD29EFED75C5C5D2816F86B737FC4F5021A231" },
{ "664361377D3A1B42", "B9B72B3FA9C877AF292087F765112F859B72C64D" },
{ "49342E5C4471804", "EC664F610315BD0B049A6A42B7003BBAFF99CAF1" },
{ "AFCCAF2B1C3C57", "6E87E67009B19014A2714DB2E174474B3A5C303F" },
{ "7E9F50617E9B60F6", "90D62A04AC0B96827FB0EA67514D3B9A1E3BF91F" },
{ "1AA7B7342075E25", "BF43CD93D89C5285E27B84FE8EFB4E1AC501A3B1" },
{ "471A23BD25EA94", "A17C2F9CE17F09BA78D846F8C8CFC7F7079C23B2" },
{ "47A9A3573E92187", "AC4E454B5D51815B18867CA04560EB5AD8838D7E" },
{ "162A776E4E115434", "E188A468F6A8EE07441C4A1AC63FB29F8D53951B" },
{ "4148515F1974A6C", "E20C4BEB9A4166188C49D8AC7715E759902AF87B" },
{ "23791E662438167E", "DAC1332B09E674A4A619D5A1A1855B17A4D97F8D" },
{ "631298D109F6059", "AEF468EE84F95E064042E7B6D0DCE0608677401A" },
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{ "6BE71AA9227837FE", "6DDFA1F4595A70906C71958B9CBF06582ECC8D3D" },
{ "46BE7BA86F768B1", "C1B8BDC35596EFB40826BE0DF6A7303A1459AD72" },
{ "49E67C4D6B3562ED", "78AF9E59782B0F590464CF9936138798B5F2CF48" },
{ "29A527B2491D226C", "D9C08A2FA2D0AC2A8FE53CCEBD4F2EC31474B9BA" },
{ "3AE167BA3B5149A4", "7704AC660058B05F1A3ECC308FA91A18FFFF84F9" },
{ "589368974C076236", "E4F9B6827BE31BDE47454E28560A9FAD8E3CDBA0" },
{ "3D78558F26167C89", "3EEC56001D9EA511C1F4CC8BBE830BC47BD8BB0A" },
{ "260A52FF5C5072B2", "9A05010BF879AD36D43327DAD911382D50903FF7" },
{ "4EAE59A03B135298", "B491A64DE34519D96E0D428880AD86B0B0F0735F" },
{ "222F5709581B3355", "45B0A24B64A678C5B6A434FCE00016C49A1C75F6" },
{ "2C6B3775549A79DF", "66B37BEFCF9399108C27DC72208E00AB827A7DD2" },
{ "254C3CC758B50E7", "193BC88CFAE3B57050BEAEA9E8AFA097BF8F3B5C" },
{ "27FA46CB76435801", "6D3B25F5B6A0DFD6146AF305781D34E57C5D682C" },
{ "6A4F70BF79494E06", "1A29C1131308250744818611B8329117EE594C1B" },
{ "88C28123B673AB6", "133F545A93DAC8A15DB200C6C0A21090D38541A0" },
{ "394A206BD015BA2", "C2F2FDF47C6BD12310FCDB3B564A5AAA4EE4C627" },
{ "7DB348ED55A6584A", "EE1869A8D0AF990C1D58EF7C683CC6E23BCF0BB1" },
{ "21F126BA65E5182", "E239256C1CB03967F46C9B24005FC8C0E20B1A0D" },
{ "21E738B51B62201A", "E88733B15DC9396B1B20EF094771CF44C818A69A" },
{ "461F488DB2916BD", "24BA1E079FF6BB3CF7F57DC63E1FBCA5C1C6A2F8" },
{ "D044CF726415B1A", "69FC69EE7C95738F917AEA73D1FB6B907AD91953" },
{ "3452413AC85A42", "D66A8D7BC90A297726DFED969FDAA6EF19939864" },
{ "76CA15F11AF1C51", "CB2084E4290C216DF0D0AD8A445A362F8799648A" },
{ "522A1F0C38B67B51", "2CB76D8A0993DE62D0C108D6814D4F7DE0D4C8D1" },
{ "695C2319695A15B", "F097275236912E370955E54509C0E554D28A45A5" },
{ "56EE6FC263FC21FF", "84DE0DD44B8155E58D8E324CBDE2D69E6FC6DD21" },
{ "3C2179617B442E7", "5BCA55150CE749AED97A0CE7B1A7EB205735E7E7" },
{ "56073D0C3E9E7B6", "E4CAADA710179666EA035F509681F9B8DE7FFCFC" },
{ "4C67EC424741536", "B64DC756FD081BBC106EA069708B3C6596222898" },
{ "598259113B62FB3", "BF6A3C57226D5BE61C0C20FD17FC935E37C57E64" },
{ "139C50B5731558A2", "982B1A75CCB87E2AD7EAB23F149A7FEB785BE875" },
{ "C927AEB6164F87", "D830239C33F736942B7FF97B7B12137465CEC08E" },
{ "661356AB31561A15", "74A8F21FB34D6A05C1C08B6BB8DE5712913E8A54" },
{ "760C2B29A0A3796", "0C2B97FC56DA10ADBB6D47A4F079ECDF7EA8BB95" },
{ "F641F9F65B8638D", "369C3F95D1A57DA57655B39807C47D685AA8BFC7" },
{ "42EA4C892B9A", "E34C0A3756936F4852CC6EC0035F5EF66562D477" },
{ "2C8C54BCE045C9F", "B62D5A37BC45ECC0C374C4905629F0D9392715C1" },
{ "20C92B4B3F892B21", "282B4A757C5C4E1DDBFA0D1C39EA53576AB91399" }
};
Pair<uint8_t, StringView> SAMPRakNet::GenerateAuth()
{
const uint8_t rnd = rand();
return Pair<uint8_t, StringView> { rnd, AuthTable[rnd].send };
}
bool SAMPRakNet::CheckAuth(uint8_t index, StringView auth)
{
return AuthTable[index].recv == auth;
}
uint16_t cookies[2][256];
void SAMPRakNet::SeedCookie()
{
for (int i = 0; i < 256; ++i) {
cookies[0][i] = rand() % (USHRT_MAX + 1);
cookies[1][i] = rand() % (USHRT_MAX + 1);
}
}
uint16_t SAMPRakNet::GetCookie(unsigned int address)
{
const uint8_t* addressSplit = (const uint8_t*)&address;
return (cookies[0][addressSplit[0]] | cookies[1][addressSplit[3]] << 8) ^ ((addressSplit[1] << 8) | addressSplit[2]);
}
bool SAMPRakNet::OnConnectionRequest(
SOCKET connectionSocket,
RakNet::PlayerID& playerId,
const char* data,
RakNet::RakNetTime& minConnectionTick,
RakNet::RakNetTime& minConnectionLogTick
)
{
if (playerId.binaryAddress == LOCALHOST)
{
// Allow unlimited connections from localhost (testing and bots).
}
else
{
RakNet::RakNetTime tickTime = RakNet::GetTime();
if (tickTime < gracePeriod_)
{
// Allow unlimited connections during the grace period
}
else if (SAMPRakNet::IsAlreadyRequestingConnection(playerId.binaryAddress))
{
return false;
}
else
{
RakNet::RakNetTime configuredMinConnTime = SAMPRakNet::GetMinConnectionTime();
if (minConnectionTick && configuredMinConnTime > 0 && tickTime - minConnectionTick < configuredMinConnTime)
{
if (!minConnectionLogTick || tickTime - minConnectionLogTick > configuredMinConnTime)
{
core_->logLn(
LogLevel::Warning,
"Minimum time between new connections (%u) exceeded for %s. Ignoring the request.",
configuredMinConnTime,
playerId.ToString());
minConnectionLogTick = tickTime;
}
return false;
}
minConnectionTick = tickTime;
}
}
if ((*(uint16_t*)(data + 1) ^ 0x6969 /* Petarded [S04E06] */) != (uint16_t)(SAMPRakNet::GetCookie(playerId.binaryAddress)))
{
#ifdef _DO_PRINTF
if (SAMPRakNet::ShouldLogCookies())
{
core_->printLn("%s requests connection cookie", playerId.ToString());
}
#endif
char c[3];
c[0] = RakNet::ID_OPEN_CONNECTION_COOKIE;
*(uint16_t*)&c[1] = (uint16_t)(SAMPRakNet::GetCookie(playerId.binaryAddress));
RakNet::SocketLayer::Instance()->SendTo(connectionSocket, (const char*)&c, 3, playerId.binaryAddress, playerId.port);
return false;
}
return true;
}