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Merge pull request #3503 from j-selby/fix-leaky-enet

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Handle ENet packet destruction if the packet is not sent anywhere
This commit is contained in:
Weiyi Wang 2018-03-11 18:40:49 +02:00 committed by GitHub
commit 6c63bb11d9
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 48 additions and 6 deletions
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51
src/network/room.cpp
View file

@ -9,12 +9,29 @@
#include <random>
#include <sstream>
#include <thread>
#include "common/logging/log.h"
#include "enet/enet.h"
#include "network/packet.h"
#include "network/room.h"
namespace Network {
std::string MacAddressToString(const MacAddress& address) {
std::stringstream result;
bool is_start = true;
for (const auto& octal : address) {
if (!is_start) {
result << ":";
}
result << std::hex << octal;
is_start = false;
}
return result.str();
}
class Room::RoomImpl {
public:
// This MAC address is used to generate a 'Nintendo' like Mac address.
@ -318,11 +335,13 @@ void Room::RoomImpl::SendJoinSuccess(ENetPeer* client, MacAddress mac_address) {
void Room::RoomImpl::SendCloseMessage() {
Packet packet;
packet << static_cast<u8>(IdCloseRoom);
ENetPacket* enet_packet =
enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
std::lock_guard<std::mutex> lock(member_mutex);
for (auto& member : members) {
enet_peer_send(member.peer, 0, enet_packet);
if (!members.empty()) {
ENetPacket* enet_packet =
enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
for (auto& member : members) {
enet_peer_send(member.peer, 0, enet_packet);
}
}
enet_host_flush(server);
for (auto& member : members) {
@ -385,9 +404,16 @@ void Room::RoomImpl::HandleWifiPacket(const ENetEvent* event) {
if (destination_address == BroadcastMac) { // Send the data to everyone except the sender
std::lock_guard<std::mutex> lock(member_mutex);
bool sent_packet = false;
for (const auto& member : members) {
if (member.peer != event->peer)
if (member.peer != event->peer) {
sent_packet = true;
enet_peer_send(member.peer, 0, enet_packet);
}
}
if (!sent_packet) {
enet_packet_destroy(enet_packet);
}
} else { // Send the data only to the destination client
std::lock_guard<std::mutex> lock(member_mutex);
@ -397,6 +423,11 @@ void Room::RoomImpl::HandleWifiPacket(const ENetEvent* event) {
});
if (member != members.end()) {
enet_peer_send(member->peer, 0, enet_packet);
} else {
std::string formatted_address = MacAddressToString(destination_address);
LOG_ERROR(Network, "Attempting to send to unknown MAC address: %s",
formatted_address.c_str());
enet_packet_destroy(enet_packet);
}
}
enet_host_flush(server);
@ -429,10 +460,18 @@ void Room::RoomImpl::HandleChatPacket(const ENetEvent* event) {
ENetPacket* enet_packet = enet_packet_create(out_packet.GetData(), out_packet.GetDataSize(),
ENET_PACKET_FLAG_RELIABLE);
bool sent_packet = false;
for (const auto& member : members) {
if (member.peer != event->peer)
if (member.peer != event->peer) {
sent_packet = true;
enet_peer_send(member.peer, 0, enet_packet);
}
}
if (!sent_packet) {
enet_packet_destroy(enet_packet);
}
enet_host_flush(server);
}

3
src/network/room.h
View file

@ -45,6 +45,9 @@ constexpr MacAddress NoPreferredMac = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
// 802.11 broadcast MAC address
constexpr MacAddress BroadcastMac = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
/// Converts a MAC address to a string representation.
std::string MacAddressToString(const MacAddress& address);
// The different types of messages that can be sent. The first byte of each packet defines the type
enum RoomMessageTypes : u8 {
IdJoinRequest = 1,