1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# 4# Test a PRP RedBox (PRP-SAN): a SAN that sits behind the interlink port must 5# reach, and be reached by, a peer DANP on the PRP network with its own MAC 6# preserved on the wire, and the RedBox must announce the SAN with a RedBox-MAC 7# TLV (terminated by an EOT marker) in its PRP supervision frames. 8# 9# RB PRP RedBox: prp0 over rb_a/rb_b (LAN A/B) + interlink rb_il 10# PEER peer DANP : prp0 over pe_a/pe_b, 100.64.0.2 11# SAN SAN : san_il, own MAC, 100.64.0.51 (behind the interlink) 12 13ipv6=false 14 15source ./hsr_common.sh 16 17check_prerequisites 18 19if ! command -v tcpdump >/dev/null 2>&1; then 20 echo "SKIP: This test requires tcpdump" 21 exit $ksft_skip 22fi 23 24if ! ip link help hsr 2>&1 | grep -q interlink; then 25 echo "SKIP: iproute2 too old (no hsr interlink support)" 26 exit $ksft_skip 27fi 28 29setup_ns RB PEER SAN 30trap 'cleanup_ns "$RB" "$PEER" "$SAN"' EXIT 31 32ip link add rb_a netns "$RB" type veth peer name pe_a netns "$PEER" 33ip link add rb_b netns "$RB" type veth peer name pe_b netns "$PEER" 34ip link add rb_il netns "$RB" type veth peer name san_il netns "$SAN" 35 36ip -n "$RB" link set rb_a up 37ip -n "$RB" link set rb_b up 38ip -n "$RB" link set rb_il up 39ip -n "$PEER" link set pe_a up 40ip -n "$PEER" link set pe_b up 41ip -n "$SAN" link set san_il up 42ip -n "$SAN" addr add 100.64.0.51/24 dev san_il 43 44# Feature gate: PRP interlink (RedBox) creation. A kernel without PRP RedBox 45# support rejects this with -EINVAL, so SKIP rather than FAIL. 46if ! ip -n "$RB" link add name prp0 type hsr slave1 rb_a slave2 rb_b \ 47 interlink rb_il proto 1 2>/dev/null; then 48 echo "SKIP: kernel without PRP RedBox (interlink) support" 49 exit $ksft_skip 50fi 51ip -n "$RB" link set prp0 up 52ip -n "$PEER" link add name prp0 type hsr slave1 pe_a slave2 pe_b proto 1 53ip -n "$PEER" link set prp0 up 54ip -n "$PEER" addr add 100.64.0.2/24 dev prp0 55sleep 1 56 57san_mac=$(ip -n "$SAN" -br link show san_il | awk '{print $3}') 58rb_mac=$(ip -n "$RB" -br link show rb_il | awk '{print $3}') 59 60# Bidirectional unicast across the interlink. 61do_ping "$PEER" 100.64.0.51 62do_ping "$SAN" 100.64.0.2 63stop_if_error "PRP RedBox bidirectional unicast failed" 64 65# The SAN source MAC must be preserved on the PRP network, not laundered to the 66# RedBox MAC: the peer resolves the SAN IP to the SAN's own MAC. 67neigh=$(ip -n "$PEER" neigh show 100.64.0.51 | awk '{print $5}') 68if [ "$neigh" != "$san_mac" ]; then 69 echo "SAN MAC preservation [ FAIL ]: peer resolved 100.64.0.51 to" \ 70 "'$neigh', expected $san_mac" 1>&2 71 ret=1 72fi 73stop_if_error "SAN MAC not preserved on the PRP network" 74 75# The proxy-announce supervision frame must carry, in order, the life-check TLV 76# (type 0x14, len 6) + MacAddressA == SAN MAC + the RedBox-MAC TLV (type 0x1e, 77# len 6) + MacAddressRedBox == RedBox MAC + the EOT marker (0x0000). 78ip netns exec "$SAN" ping -i 0.2 -q 100.64.0.2 >/dev/null 2>&1 & 79ping_pid=$! 80cap=$(ip netns exec "$PEER" timeout 5 tcpdump -i pe_a -nn -x \ 81 "ether proto 0x88fb and ether src $rb_mac" 2>/dev/null || true) 82kill "$ping_pid" 2>/dev/null || true 83wait "$ping_pid" 2>/dev/null || true 84 85san_hex=$(echo "$san_mac" | tr -d ':') 86rb_hex=$(echo "$rb_mac" | tr -d ':') 87# Reassemble contiguous frame hex: drop the "0x0010:" offset labels and spaces. 88frame_hex=$(echo "$cap" | awk '/^[[:space:]]*0x[0-9a-f]+:/ { 89 sub(/^[[:space:]]*0x[0-9a-f]+:[[:space:]]*/, ""); 90 gsub(/ /, ""); printf "%s", $0 }') 91if ! echo "$frame_hex" | grep -q "1406${san_hex}1e06${rb_hex}0000"; then 92 echo "supervision RedBox-MAC TLV [ FAIL ]: missing SAN MAC, Type-30" \ 93 "payload, or EOT" 1>&2 94 ret=1 95fi 96stop_if_error "PRP RedBox supervision RedBox-MAC TLV/EOT check failed" 97 98echo "INFO: PRP RedBox (PRP-SAN) conformance checks passed" 99exit $ret 100