ouroboros/src/lib/poa, branch testing

ipcpd: Assign random MAC on ETH poa with loopback

2026-08-31T06:31:46+00:00

The loopback has an all-zero MAC, so two PoAs on a loopback receive their own frames and a PoA refuses its own FLOW_REQ, failing the flow with ECONNREFUSED. The shim IPCP didn't have this problem because it ignored requests for names not registered locally (shim-data). The PoA has no "local" name registry, it uses the unicast IPCP's directory (DHT) via IRMd query requests. This fixes the issue by generating a random locally administered MAC on the loopback device. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

lib: Update FRCT loss recovery

2026-08-31T06:31:46+00:00

Some more stability fixes in FRCT. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

ipcpd: Use capacity queue estimation for mb-ecn

2026-08-31T06:31:45+00:00

The mb-ecn algorithm was using rbuff queue depths in packets to mark, but sockets in the poa component report capacity in bytes. The tx rings are now adaptive to block on queuing delay instead of when full to prevent buffer bloat, controllable via fccntl (FLOWSTXQDLY and FLOWGTXQDLY). Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

lib: Replace shim IPCPs with points of attachment

2026-08-31T06:31:45+00:00

Removes the UDP and Ethernet shim IPCPs. The unicast and broadcast IPCPs can now directly attach to a "legacy" socket. We adopt Saltzer's Point-of-Attachment terminology, also advocated in Day's "Patterns in Network Architecture". The "poa" component manages these PoA's with one management thread, one link monitoring thread and one thread per attached point. For Ethernet PoA's the irm connect and enroll can resolve the destination IPCP or Layer name with a broadcast name query over the attached PoAs (first reply wins). UDP PoA's require a destination IP address or FQDN. attach to a local endpoint (required both server and client side): irm ipcp poa attach name a udp 10.0.0.1 irm ipcp poa attach name a udp 10.0.0.1:3435 irm ipcp poa attach name a udp [::1]:3435 irm ipcp poa attach name a eth dev eth0 irm ipcp poa attach name a eth dev eth0 ethertype 0xA000 release a PoA (refused while it carries a flow): irm ipcp poa detach name a udp 10.0.0.1:3435 irm ipcp poa detach name a eth eth0 list an IPCP's PoAs: irm ipcp poa list name a connect to a peer, by name or at an address: irm ipcp connect name b dst a irm ipcp connect name b dst a eth irm ipcp connect name b dst a eth dev eth0 irm ipcp connect name b dst a udp 10.0.0.1:3435 irm ipcp connect name b dst a udp peer.example.com:3435 disconnect by peer name, no address: irm ipcp disconnect name b dst a irm ipcp disconnect name b dst a component mgmt enroll has the same shape as connect: irm ipcp enroll name b layer lr autobind irm ipcp enroll name b layer lr autobind eth dev eth0 irm ipcp enroll name b layer lr autobind udp 10.0.0.1:3435 the IRMd config file attaches PoAs and names peers the same way: udp = [ "10.0.0.1", "10.0.0.1:3436" ] eth = [ "eth0", {dev="eth1", ethertype=0xA007} ] enrol={dst="LAN", eth={dev="eth0"}} conn=[{dst="lan3", eth={}}, {dst="lan4", udp="10.0.0.1:3435"}] Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders