Itms
ef71533d70
This fixes packet loss issues on some VPN solutions. Patch By: sera Differential Revision: https://code.wildfiregames.com/D4967 This was SVN commit r27599.
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/* Copyright (C) 2023 Wildfire Games.
|
|
* This file is part of 0 A.D.
|
|
*
|
|
* 0 A.D. is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 0 A.D. is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "precompiled.h"
|
|
|
|
#include "NetEnet.h"
|
|
|
|
#include "ps/ConfigDB.h"
|
|
#include "ps/containers/Span.h"
|
|
|
|
namespace PS
|
|
{
|
|
|
|
namespace Enet
|
|
{
|
|
|
|
// ENet protocol MTU
|
|
// ENet by default uses 1400 as ENet packet fragment max size, adding ICMP and
|
|
// IPv4 headers this may exceed the MTU for some VPN solutions [1], so provide
|
|
// a lower default.
|
|
// MTU negotiation server-side needs [2], which was merged after enet-1.3.17,
|
|
// so the user configured value may be ignored on older versions.
|
|
// [1] https://github.com/lsalzman/enet/issues/132
|
|
// [2] https://github.com/lsalzman/enet/pull/222
|
|
constexpr enet_uint32 HOST_DEFAULT_MTU = 1372;
|
|
|
|
ENetHost* CreateHost(const ENetAddress* address, size_t peerCount, size_t channelLimit)
|
|
{
|
|
// TODO: Maybe allow user to set rate limits?
|
|
|
|
ENetHost* host = enet_host_create(address, peerCount, channelLimit, 0, 0);
|
|
if (!host)
|
|
return nullptr;
|
|
|
|
// Public ENet API doesn't offer a means to change MTU, so do it in a
|
|
// way least likely to break with ENet updates.
|
|
enet_uint32 mtu = HOST_DEFAULT_MTU;
|
|
CFG_GET_VAL("network.enetmtu", mtu);
|
|
host->mtu = mtu;
|
|
for (ENetPeer& p : PS::span{host->peers, host->peerCount})
|
|
enet_peer_reset(&p);
|
|
|
|
return host;
|
|
}
|
|
|
|
} // namespace Enet
|
|
|
|
} // namespace PS
|