moonlight-stream/moonlight-common-c
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Overflow onto channel 0 rather than distributing

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This allows the host to make some assumptions about channel IDs
This commit is contained in:
Cameron Gutman 2023-07-04 16:51:35 -05:00
parent 377d37503f
commit f3b7edbd11
1 changed files with 3 additions and 10 deletions
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13
src/ControlStream.c
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@ -630,18 +630,11 @@ static bool sendMessageEnet(short ptype, short paylen, const void* payload, uint
enetPacket->userData = (void*)&packetFreed;
enetPacket->freeCallback = enetPacketFreeCb;
// channelCount == 0 is possible if the peer is disconnected,
// so we need to assign channel ID under the enetMutex to prevent
// racing updates the peer.
if (!IS_SUNSHINE() || peer->channelCount == 0) {
// We always use a single channel for GFE.
// Always use channel 0 for GFE and if the requested channel exceeds
// the peer's supported channel count.
if (!IS_SUNSHINE() || channelId >= peer->channelCount) {
channelId = 0;
}
else if (channelId >= peer->channelCount) {
// If this peer doesn't support enough channels, distribute the remaining channels onto the ones
// the peer does support. We don't use the channel to distinguish traffic types, so this is safe.
channelId %= peer->channelCount;
}
// Queue the packet to be sent
err = enet_peer_send(peer, channelId, enetPacket);