designs/mctp/mctp-kernel.md

234 the MCTP broadcast EID (0xff).
460 - **controller**: a specific service for a bus owner; may send broadcast
578 ##### Broadcast request
580 Sends a request to a broadcast EID, and receives (unicast) replies. Typical
596             txaddr.smctp_network = 1; /* specific network required for broadcast */
597             txaddr.smctp_addr.s_addr = MCTP_TAG_BCAST; /* broadcast dest */
604             /* We're doing a sendto() to a broadcast address here. If we were
605              * sending more than one broadcast message, we'd be better off
730 Broadcast messages are particularly onerous for tag reservations. When a message
731 is transmitted with TO=1 and dest=0xff (the broadcast EID), the kernel must
734 `sendto()` to a broadcast address. Additionally, this reservation is not cleared
735 when a reply is received, as there may be multiple replies to a broadcast.
737 For this reason, applications wanting to send to the broadcast address should
740 use with _any other EID_. Sending to the broadcast address should be avoided; we
946 Broadcast MCTP request messages may have multiple replies from multiple