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Make header skips more obvious (#1074)

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* Make header skips more obvious

seeing inStream.Read(LWOOBJID) is much less clear than a macro which very clearly skips the header.

* Formatting pass
This commit is contained in:
David Markowitz 2023-05-08 04:31:10 -07:00 committed by GitHub
parent 64a947e338
commit 7aad6e4bc2
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 63 additions and 51 deletions
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36
dChatServer/ChatPacketHandler.cpp
View File

@ -22,10 +22,9 @@ extern PlayerContainer playerContainer;
void ChatPacketHandler::HandleFriendlistRequest(Packet* packet) {
//Get from the packet which player we want to do something with:
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID = 0;
inStream.Read(playerID);
inStream.Read(playerID);
auto player = playerContainer.GetPlayerData(playerID);
if (!player) return;
@ -99,10 +98,9 @@ void ChatPacketHandler::HandleFriendRequest(Packet* packet) {
auto maxNumberOfBestFriendsAsString = Game::config->GetValue("max_number_of_best_friends");
// If this config option doesn't exist, default to 5 which is what live used.
auto maxNumberOfBestFriends = maxNumberOfBestFriendsAsString != "" ? std::stoi(maxNumberOfBestFriendsAsString) : 5U;
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID requestorPlayerID;
inStream.Read(requestorPlayerID);
inStream.Read(requestorPlayerID);
uint32_t spacing{};
inStream.Read(spacing);
std::string playerName = "";
@ -247,10 +245,9 @@ void ChatPacketHandler::HandleFriendRequest(Packet* packet) {
}
void ChatPacketHandler::HandleFriendResponse(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID;
inStream.Read(playerID);
inStream.Read(playerID);
eAddFriendResponseCode clientResponseCode = static_cast<eAddFriendResponseCode>(packet->data[0x14]);
std::string friendName = PacketUtils::ReadString(0x15, packet, true);
@ -323,10 +320,9 @@ void ChatPacketHandler::HandleFriendResponse(Packet* packet) {
}
void ChatPacketHandler::HandleRemoveFriend(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID;
inStream.Read(playerID);
inStream.Read(playerID);
std::string friendName = PacketUtils::ReadString(0x14, packet, true);
//we'll have to query the db here to find the user, since you can delete them while they're offline.
@ -381,10 +377,9 @@ void ChatPacketHandler::HandleRemoveFriend(Packet* packet) {
}
void ChatPacketHandler::HandleChatMessage(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID = LWOOBJID_EMPTY;
inStream.Read(playerID);
inStream.Read(playerID);
auto* sender = playerContainer.GetPlayerData(playerID);
@ -501,10 +496,9 @@ void ChatPacketHandler::HandlePrivateChatMessage(Packet* packet) {
}
void ChatPacketHandler::HandleTeamInvite(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID;
inStream.Read(playerID);
inStream.Read(playerID);
std::string invitedPlayer = PacketUtils::ReadString(0x14, packet, true);
auto* player = playerContainer.GetPlayerData(playerID);
@ -542,10 +536,9 @@ void ChatPacketHandler::HandleTeamInvite(Packet* packet) {
}
void ChatPacketHandler::HandleTeamInviteResponse(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID = LWOOBJID_EMPTY;
inStream.Read(playerID);
inStream.Read(playerID);
uint32_t size = 0;
inStream.Read(size);
char declined = 0;
@ -576,10 +569,9 @@ void ChatPacketHandler::HandleTeamInviteResponse(Packet* packet) {
}
void ChatPacketHandler::HandleTeamLeave(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID = LWOOBJID_EMPTY;
inStream.Read(playerID);
inStream.Read(playerID);
uint32_t size = 0;
inStream.Read(size);
@ -593,10 +585,9 @@ void ChatPacketHandler::HandleTeamLeave(Packet* packet) {
}
void ChatPacketHandler::HandleTeamKick(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID = LWOOBJID_EMPTY;
inStream.Read(playerID);
inStream.Read(playerID);
std::string kickedPlayer = PacketUtils::ReadString(0x14, packet, true);
@ -624,10 +615,9 @@ void ChatPacketHandler::HandleTeamKick(Packet* packet) {
}
void ChatPacketHandler::HandleTeamPromote(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID = LWOOBJID_EMPTY;
inStream.Read(playerID);
inStream.Read(playerID);
std::string promotedPlayer = PacketUtils::ReadString(0x14, packet, true);
@ -647,10 +637,9 @@ void ChatPacketHandler::HandleTeamPromote(Packet* packet) {
}
void ChatPacketHandler::HandleTeamLootOption(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID = LWOOBJID_EMPTY;
inStream.Read(playerID);
inStream.Read(playerID);
uint32_t size = 0;
inStream.Read(size);
@ -671,10 +660,9 @@ void ChatPacketHandler::HandleTeamLootOption(Packet* packet) {
}
void ChatPacketHandler::HandleTeamStatusRequest(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID = LWOOBJID_EMPTY;
inStream.Read(playerID);
inStream.Read(playerID);
auto* team = playerContainer.GetTeam(playerID);
auto* data = playerContainer.GetPlayerData(playerID);

12
dChatServer/PlayerContainer.cpp
View File

@ -19,9 +19,8 @@ PlayerContainer::~PlayerContainer() {
}
void PlayerContainer::InsertPlayer(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
PlayerData* data = new PlayerData();
inStream.SetReadOffset(inStream.GetReadOffset() + 64);
inStream.Read(data->playerID);
uint32_t len;
@ -52,9 +51,8 @@ void PlayerContainer::InsertPlayer(Packet* packet) {
}
void PlayerContainer::RemovePlayer(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID;
inStream.Read(playerID); //skip header
inStream.Read(playerID);
//Before they get kicked, we need to also send a message to their friends saying that they disconnected.
@ -97,9 +95,8 @@ void PlayerContainer::RemovePlayer(Packet* packet) {
}
void PlayerContainer::MuteUpdate(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID;
inStream.Read(playerID); //skip header
inStream.Read(playerID);
time_t expire = 0;
inStream.Read(expire);
@ -118,9 +115,8 @@ void PlayerContainer::MuteUpdate(Packet* packet) {
}
void PlayerContainer::CreateTeamServer(Packet* packet) {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID;
inStream.Read(playerID); //skip header
inStream.Read(playerID);
size_t membersSize = 0;
inStream.Read(membersSize);

2
dCommon/dEnums/dCommonVars.h
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@ -28,8 +28,10 @@ constexpr uint32_t lowFrameDelta = FRAMES_TO_MS(lowFramerate);
//========== MACROS ===========
#define HEADER_SIZE 8
#define CBITSTREAM RakNet::BitStream bitStream;
#define CINSTREAM RakNet::BitStream inStream(packet->data, packet->length, false);
#define CINSTREAM_SKIP_HEADER CINSTREAM if (inStream.GetNumberOfUnreadBits() >= BYTES_TO_BITS(HEADER_SIZE)) inStream.IgnoreBytes(HEADER_SIZE); else inStream.IgnoreBits(inStream.GetNumberOfUnreadBits());
#define CMSGHEADER PacketUtils::WriteHeader(bitStream, eConnectionType::CLIENT, eClientMessageType::GAME_MSG);
#define SEND_PACKET Game::server->Send(&bitStream, sysAddr, false);
#define SEND_PACKET_BROADCAST Game::server->Send(&bitStream, UNASSIGNED_SYSTEM_ADDRESS, true);

8
dNet/ClientPackets.cpp
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@ -46,9 +46,7 @@ void ClientPackets::HandleChatMessage(const SystemAddress& sysAddr, Packet* pack
return;
}
CINSTREAM;
uint64_t header;
inStream.Read(header);
CINSTREAM_SKIP_HEADER;
char chatChannel;
uint16_t unknown;
@ -82,9 +80,7 @@ void ClientPackets::HandleClientPositionUpdate(const SystemAddress& sysAddr, Pac
return;
}
CINSTREAM;
uint64_t header;
inStream.Read(header);
CINSTREAM_SKIP_HEADER;
Entity* entity = EntityManager::Instance()->GetEntity(user->GetLastUsedChar()->GetObjectID());
if (!entity) return;

18
dWorldServer/WorldServer.cpp
View File

@ -554,10 +554,9 @@ void HandlePacketChat(Packet* packet) {
if (static_cast<eConnectionType>(packet->data[1]) == eConnectionType::CHAT_INTERNAL) {
switch (static_cast<eChatInternalMessageType>(packet->data[3])) {
case eChatInternalMessageType::ROUTE_TO_PLAYER: {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerID;
inStream.Read(playerID);
inStream.Read(playerID);
auto player = EntityManager::Instance()->GetEntity(playerID);
if (!player) return;
@ -576,9 +575,7 @@ void HandlePacketChat(Packet* packet) {
}
case eChatInternalMessageType::ANNOUNCEMENT: {
CINSTREAM;
LWOOBJID header;
inStream.Read(header);
CINSTREAM_SKIP_HEADER;
std::string title;
std::string msg;
@ -615,11 +612,10 @@ void HandlePacketChat(Packet* packet) {
}
case eChatInternalMessageType::MUTE_UPDATE: {
CINSTREAM;
CINSTREAM_SKIP_HEADER;
LWOOBJID playerId;
time_t expire = 0;
inStream.Read(playerId);
inStream.Read(playerId);
inStream.Read(expire);
auto* entity = EntityManager::Instance()->GetEntity(playerId);
@ -634,9 +630,7 @@ void HandlePacketChat(Packet* packet) {
}
case eChatInternalMessageType::TEAM_UPDATE: {
CINSTREAM;
LWOOBJID header;
inStream.Read(header);
CINSTREAM_SKIP_HEADER;
LWOOBJID teamID = 0;
char lootOption = 0;
@ -1213,10 +1207,8 @@ void HandlePacket(Packet* packet) {
case eWorldMessageType::ROUTE_PACKET: {
//Yeet to chat
CINSTREAM;
uint64_t header = 0;
CINSTREAM_SKIP_HEADER;
uint32_t size = 0;
inStream.Read(header);
inStream.Read(size);
if (size > 20000) {

1
tests/dCommonTests/CMakeLists.txt
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@ -1,5 +1,6 @@
set(DCOMMONTEST_SOURCES
"AMFDeserializeTests.cpp"
"HeaderSkipTest.cpp"
"TestLDFFormat.cpp"
"TestNiPoint3.cpp"
"TestEncoding.cpp"

37
tests/dCommonTests/HeaderSkipTest.cpp Normal file
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@ -0,0 +1,37 @@
#include <gtest/gtest.h>
#include "dCommonDependencies.h"
#include "dCommonVars.h"
#include "BitStream.h"
#define PacketUniquePtr std::unique_ptr<Packet>
TEST(dCommonTests, HeaderSkipExcessTest) {
PacketUniquePtr packet = std::make_unique<Packet>();
unsigned char headerAndData[] = { 0x53, 0x02, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00 }; // positive
packet->data = headerAndData;
packet->length = sizeof(headerAndData);
CINSTREAM_SKIP_HEADER;
ASSERT_EQ(inStream.GetNumberOfUnreadBits(), 64);
ASSERT_EQ(inStream.GetNumberOfBitsAllocated(), 128);
}
TEST(dCommonTests, HeaderSkipExactDataTest) {
PacketUniquePtr packet = std::make_unique<Packet>();
unsigned char header[] = { 0x53, 0x02, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00 }; // positive
packet->data = header;
packet->length = sizeof(header);
CINSTREAM_SKIP_HEADER;
ASSERT_EQ(inStream.GetNumberOfUnreadBits(), 0);
ASSERT_EQ(inStream.GetNumberOfBitsAllocated(), 64);
}
TEST(dCommonTests, HeaderSkipNotEnoughDataTest) {
PacketUniquePtr packet = std::make_unique<Packet>();
unsigned char notEnoughData[] = { 0x53, 0x02, 0x00, 0x07, 0x00, 0x00 }; // negative
packet->data = notEnoughData;
packet->length = sizeof(notEnoughData);
CINSTREAM_SKIP_HEADER;
ASSERT_EQ(inStream.GetNumberOfUnreadBits(), 0);
ASSERT_EQ(inStream.GetNumberOfBitsAllocated(), 48);
}