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Send UDP packets to multicast address rather than broadcast address (#6331)

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A smart router or switch is able to snoop the multicast address to
only send the packets to nodes listening on the multicast address.

Before all machines reachable on the L2 layer would receive the packet.
This commit is contained in:
Jorropo
2025-03-17 01:36:02 +01:00
committed by GitHub
parent 2d565c2921
commit 96ba94843b
1 changed files with 1 additions and 1 deletions
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2
src/mesh/udp/UdpMulticastThread.h
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@@ -56,7 +56,7 @@ class UdpMulticastThread : public concurrency::OSThread
LOG_DEBUG("Broadcasting packet over UDP (id=%u)", mp->id);
uint8_t buffer[meshtastic_MeshPacket_size];
size_t encodedLength = pb_encode_to_bytes(buffer, sizeof(buffer), &meshtastic_MeshPacket_msg, mp);
udp.broadcastTo(buffer, encodedLength, UDP_MULTICAST_DEFAUL_PORT);
udp.writeTo(buffer, encodedLength, udpIpAddress, UDP_MULTICAST_DEFAUL_PORT);
return true;
}