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added sanity checks

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This commit is contained in:
CPunch 2020-08-18 19:11:31 -05:00
parent 208f4b3bbd
commit 47b76b422c
6 changed files with 53 additions and 10 deletions
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18
src/CNLoginServer.cpp
View File

@ -19,6 +19,9 @@ CNLoginServer::CNLoginServer(uint16_t p) {
void CNLoginServer::handlePacket(CNSocket* sock, CNPacketData* data) {
switch (data->type) {
case P_CL2LS_REQ_LOGIN: {
if (data->size != sizeof(sP_CL2LS_REQ_LOGIN))
return; // ignore the malformed packet
sP_CL2LS_REQ_LOGIN* login = (sP_CL2LS_REQ_LOGIN*)data->buf;
sP_LS2CL_REP_LOGIN_SUCC* response = (sP_LS2CL_REP_LOGIN_SUCC*)xmalloc(sizeof(sP_LS2CL_REP_LOGIN_SUCC));
uint64_t cachedKey = sock->getEKey(); // so we can still send the response packet with the correct key
@ -110,6 +113,9 @@ void CNLoginServer::handlePacket(CNSocket* sock, CNPacketData* data) {
break;
}
case P_CL2LS_REQ_CHECK_CHAR_NAME: {
if (data->size != sizeof(sP_CL2LS_REQ_CHECK_CHAR_NAME))
return;
// naughty words allowed!!!!!!!! (also for some reason, the client will always show 'Player 0' if you manually type a name. It will show up for other connected players though)
sP_CL2LS_REQ_CHECK_CHAR_NAME* nameCheck = (sP_CL2LS_REQ_CHECK_CHAR_NAME*)data->buf;
sP_LS2CL_REP_CHECK_CHAR_NAME_SUCC* response = (sP_LS2CL_REP_CHECK_CHAR_NAME_SUCC*)xmalloc(sizeof(sP_LS2CL_REP_CHECK_CHAR_NAME_SUCC));
@ -127,6 +133,9 @@ void CNLoginServer::handlePacket(CNSocket* sock, CNPacketData* data) {
break;
}
case P_CL2LS_REQ_SAVE_CHAR_NAME: {
if (data->size != sizeof(sP_CL2LS_REQ_SAVE_CHAR_NAME))
return;
sP_CL2LS_REQ_SAVE_CHAR_NAME* save = (sP_CL2LS_REQ_SAVE_CHAR_NAME*)data->buf;
sP_LS2CL_REP_SAVE_CHAR_NAME_SUCC* response = (sP_LS2CL_REP_SAVE_CHAR_NAME_SUCC*)xmalloc(sizeof(sP_LS2CL_REP_SAVE_CHAR_NAME_SUCC));
@ -146,6 +155,9 @@ void CNLoginServer::handlePacket(CNSocket* sock, CNPacketData* data) {
break;
}
case P_CL2LS_REQ_CHAR_CREATE: {
if (data->size != sizeof(sP_CL2LS_REQ_CHAR_CREATE))
return;
sP_CL2LS_REQ_CHAR_CREATE* character = (sP_CL2LS_REQ_CHAR_CREATE*)data->buf;
sP_LS2CL_REP_CHAR_CREATE_SUCC* response = (sP_LS2CL_REP_CHAR_CREATE_SUCC*)xmalloc(sizeof(sP_LS2CL_REP_CHAR_CREATE_SUCC));
@ -194,6 +206,9 @@ void CNLoginServer::handlePacket(CNSocket* sock, CNPacketData* data) {
break;
}
case P_CL2LS_REQ_CHAR_SELECT: {
if (data->size != sizeof(sP_CL2LS_REQ_CHAR_SELECT))
return;
// character selected
sP_CL2LS_REQ_CHAR_SELECT* chararacter = (sP_CL2LS_REQ_CHAR_SELECT*)data->buf;
sP_LS2CL_REP_CHAR_SELECT_SUCC* response = (sP_LS2CL_REP_CHAR_SELECT_SUCC*)xmalloc(sizeof(sP_LS2CL_REP_CHAR_SELECT_SUCC));
@ -209,6 +224,9 @@ void CNLoginServer::handlePacket(CNSocket* sock, CNPacketData* data) {
break;
}
case P_CL2LS_REQ_SHARD_SELECT: {
if (data->size != sizeof(sP_CL2LS_REQ_SHARD_SELECT))
return;
// tell client to connect to the shard server
sP_CL2LS_REQ_SHARD_SELECT* shard = (sP_CL2LS_REQ_SHARD_SELECT*)data->buf;
sP_LS2CL_REP_SHARD_SELECT_SUCC* response = (sP_LS2CL_REP_SHARD_SELECT_SUCC*)xmalloc(sizeof(sP_LS2CL_REP_SHARD_SELECT_SUCC));

2
src/CNProtocol.hpp
View File

@ -41,7 +41,7 @@
/*
Packets format (sent from the client):
[4 bytes] - size of packet (including these 4 bytes!)
[4 bytes] - size of packet including the 4 byte packet type
[size bytes] - Encrypted packet (byte swapped && xor'd with 8 byte key; see CNSocketEncryption)
[4 bytes] - packet type (which is a combination of the first 4 bytes of the packet and a checksum in some versions)
[structure]

1
src/CNShardServer.cpp
View File

@ -29,5 +29,4 @@ void CNShardServer::killConnection(CNSocket* cns) {
PlayerManager::removePlayer(cns);
CNSharedData::erasePlayer(cachedPlr.SerialKey);
std::cout << U16toU8(cachedPlr.PCStyle.szFirstName) << " " << U16toU8(cachedPlr.PCStyle.szLastName) << " left" << std::endl;
}

2
src/CNShardServer.hpp
View File

@ -34,10 +34,10 @@ enum SHARDPACKETID {
#define REGISTER_SHARD_PACKET(pactype, handlr) CNShardServer::ShardPackets[pactype] = handlr;
// WARNING: THERE CAN ONLY BE ONE OF THESE SERVERS AT A TIME!!!!!! TODO: change players & packet handlers to be non-static
class CNShardServer : public CNServer {
private:
static void handlePacket(CNSocket* sock, CNPacketData* data);
public:
static std::map<uint32_t, PacketHandler> ShardPackets;

3
src/ChatManager.cpp
View File

@ -15,6 +15,9 @@ void ChatManager::chatHandler(CNSocket* sock, CNPacketData* data) {
}
void ChatManager::emoteHandler(CNSocket* sock, CNPacketData* data) {
if (data->size != sizeof(sP_CL2FE_REQ_PC_AVATAR_EMOTES_CHAT))
return; // ignore the malformed packet
// you can dance with friends!!!!!!!!
sP_CL2FE_REQ_PC_AVATAR_EMOTES_CHAT* emote = (sP_CL2FE_REQ_PC_AVATAR_EMOTES_CHAT*)data->buf;

37
src/PlayerManager.cpp
View File

@ -27,6 +27,9 @@ void PlayerManager::addPlayer(CNSocket* key, Player plr) {
players[key] = PlayerView();
players[key].viewable = std::list<CNSocket*>();
players[key].plr = plr;
std::cout << U16toU8(plr.PCStyle.szFirstName) << U16toU8(plr.PCStyle.szLastName) << " has joined!" << std::endl;
std::cout << players.size() << " players" << std::endl;
}
void PlayerManager::removePlayer(CNSocket* key) {
@ -44,6 +47,9 @@ void PlayerManager::removePlayer(CNSocket* key) {
}
players.erase(key);
std::cout << U16toU8(cachedView.plr.PCStyle.szFirstName) << U16toU8(cachedView.plr.PCStyle.szLastName) << " has left!" << std::endl;
std::cout << players.size() << " players" << std::endl;
}
Player PlayerManager::getPlayer(CNSocket* key) {
@ -137,6 +143,9 @@ void PlayerManager::updatePlayerPosition(CNSocket* sock, int X, int Y, int Z) {
}
void PlayerManager::enterPlayer(CNSocket* sock, CNPacketData* data) {
if (data->size != sizeof(sP_CL2FE_REQ_PC_ENTER))
return; // ignore the malformed packet
sP_CL2FE_REQ_PC_ENTER* enter = (sP_CL2FE_REQ_PC_ENTER*)data->buf;
sP_FE2CL_REP_PC_ENTER_SUCC* response = (sP_FE2CL_REP_PC_ENTER_SUCC*)xmalloc(sizeof(sP_FE2CL_REP_PC_ENTER_SUCC));
@ -196,6 +205,9 @@ void PlayerManager::enterPlayer(CNSocket* sock, CNPacketData* data) {
}
void PlayerManager::loadPlayer(CNSocket* sock, CNPacketData* data) {
if (data->size != sizeof(sP_CL2FE_REQ_PC_LOADING_COMPLETE))
return; // ignore the malformed packet
sP_CL2FE_REQ_PC_LOADING_COMPLETE* complete = (sP_CL2FE_REQ_PC_LOADING_COMPLETE*)data->buf;
sP_FE2CL_REP_PC_LOADING_COMPLETE_SUCC* response = (sP_FE2CL_REP_PC_LOADING_COMPLETE_SUCC*)xmalloc(sizeof(sP_FE2CL_REP_PC_LOADING_COMPLETE_SUCC));
@ -210,6 +222,9 @@ void PlayerManager::loadPlayer(CNSocket* sock, CNPacketData* data) {
}
void PlayerManager::movePlayer(CNSocket* sock, CNPacketData* data) {
if (data->size != sizeof(sP_CL2FE_REQ_PC_MOVE))
return; // ignore the malformed packet
sP_CL2FE_REQ_PC_MOVE* moveData = (sP_CL2FE_REQ_PC_MOVE*)data->buf;
updatePlayerPosition(sock, moveData->iX, moveData->iY, moveData->iZ);
@ -239,16 +254,12 @@ void PlayerManager::movePlayer(CNSocket* sock, CNPacketData* data) {
}
void PlayerManager::stopPlayer(CNSocket* sock, CNPacketData* data) {
if (data->size != sizeof(sP_CL2FE_REQ_PC_STOP))
return; // ignore the malformed packet
sP_CL2FE_REQ_PC_STOP* stopData = (sP_CL2FE_REQ_PC_STOP*)data->buf;
updatePlayerPosition(sock, stopData->iX, stopData->iY, stopData->iZ);
DEBUGLOG(
std::cout << "P_CL2FE_REQ_PC_STOP:" << std::endl;
std::cout << "\tX: " << stopData->iX << std::endl;
std::cout << "\tY: " << stopData->iY << std::endl;
std::cout << "\tZ: " << stopData->iZ << std::endl;
)
uint64_t tm = getTime();
for (CNSocket* otherSock : players[sock].viewable) {
@ -268,6 +279,9 @@ void PlayerManager::stopPlayer(CNSocket* sock, CNPacketData* data) {
}
void PlayerManager::jumpPlayer(CNSocket* sock, CNPacketData* data) {
if (data->size != sizeof(sP_CL2FE_REQ_PC_JUMP))
return; // ignore the malformed packet
sP_CL2FE_REQ_PC_JUMP* jumpData = (sP_CL2FE_REQ_PC_JUMP*)data->buf;
updatePlayerPosition(sock, jumpData->iX, jumpData->iY, jumpData->iZ);
@ -296,6 +310,9 @@ void PlayerManager::jumpPlayer(CNSocket* sock, CNPacketData* data) {
}
void PlayerManager::movePlatformPlayer(CNSocket* sock, CNPacketData* data) {
if (data->size != sizeof(sP_CL2FE_REQ_PC_MOVEPLATFORM))
return; // ignore the malformed packet
sP_CL2FE_REQ_PC_MOVEPLATFORM* platformData = (sP_CL2FE_REQ_PC_MOVEPLATFORM*)data->buf;
updatePlayerPosition(sock, platformData->iX, platformData->iY, platformData->iZ);
@ -328,6 +345,9 @@ void PlayerManager::movePlatformPlayer(CNSocket* sock, CNPacketData* data) {
}
void PlayerManager::gotoPlayer(CNSocket* sock, CNPacketData* data) {
if (data->size != sizeof(sP_CL2FE_REQ_PC_GOTO))
return; // ignore the malformed packet
sP_CL2FE_REQ_PC_GOTO* gotoData = (sP_CL2FE_REQ_PC_GOTO*)data->buf;
sP_FE2CL_REP_PC_GOTO_SUCC* response = (sP_FE2CL_REP_PC_GOTO_SUCC*)xmalloc(sizeof(sP_FE2CL_REP_PC_GOTO_SUCC));
@ -346,6 +366,9 @@ void PlayerManager::gotoPlayer(CNSocket* sock, CNPacketData* data) {
}
void PlayerManager::setSpecialPlayer(CNSocket* sock, CNPacketData* data) {
if (data->size != sizeof(sP_CL2FE_GM_REQ_PC_SET_VALUE))
return; // ignore the malformed packet
sP_CL2FE_GM_REQ_PC_SET_VALUE* setData = (sP_CL2FE_GM_REQ_PC_SET_VALUE*)data->buf;
sP_FE2CL_GM_REP_PC_SET_VALUE* response = (sP_FE2CL_GM_REP_PC_SET_VALUE*)xmalloc(sizeof(sP_FE2CL_GM_REP_PC_SET_VALUE));