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Code Issues Releases Activity

Artnet check datalen does not exceed payload length (#24805)

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s-hadinger
2026-05-30 16:41:20 +02:00
committed by GitHub
parent 6a142725c9
commit 580b952dfd
1 changed files with 1 additions and 3 deletions
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tasmota/tasmota_xdrv_driver/xdrv_04_light_artnet.ino
+1 -3
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@@ -143,9 +143,7 @@ void ArtNetProcessPacket(uint8_t * buf, size_t len) {
// AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("DMX: opcode=0x%04X procotol=%i universe=%i datalen=%i univ_start=%i univ_end=%i"), opcode, protocol, universe, datalen, artnet_conf.univ, artnet_conf.univ + artnet_conf.rows);
if (opcode != 0x5000 || protocol != 14) { return; }
// if (len + 18 < datalen) {
// AddLog(LOG_LEVEL_DEBUG, PSTR("DMX: packet is truncated. Expected: %u Bytes, Received: %u Bytes."), datalen, len + 18);
// }
if (datalen > len - 18) { return; } // datalen must not exceed actual received payload length
if (universe < artnet_conf.univ || universe >= artnet_conf.univ + artnet_conf.rows) { return; } // universe is not ours, ignore
size_t idx = 18; // start of payload data in the UDP frame