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DDP input: reject packets with unsupported data type or non-display destination (#5390)

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* Fix: reject invalid DDP packets with wrong destination or unsupported data type

Co-authored-by: DedeHai <6280424+DedeHai@users.noreply.github.com>
This commit is contained in:
Copilot
2026-03-29 18:01:11 +02:00
committed by Frank
parent a233e99909
commit d9e8203276
5 changed files with 30 additions and 27 deletions
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2
wled00/ws.cpp
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@@ -100,7 +100,7 @@ void wsEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventTyp
if (len < unsigned(10 + offset)) return; // DDP header is 10 bytes (+1 protocol byte)
size_t ddpDataLen = (data[8+offset] << 8) | data[9+offset]; // data length in bytes from DDP header
uint8_t flags = data[0+offset];
if ((flags & DDP_TIMECODE_FLAG) ) ddpDataLen += 4; // timecode flag adds 4 bytes to data length
if ((flags & DDP_FLAGS_TIME) ) ddpDataLen += 4; // timecode flag adds 4 bytes to data length
if (len < (10 + offset + ddpDataLen)) return; // not enough data, prevent out of bounds read
// could be a valid DDP packet, forward to handler
handleE131Packet((e131_packet_t*)&data[offset], client->remoteIP(), P_DDP);