1#!/bin/bash
  2# SPDX-License-Identifier: GPL-2.0
  3#
  4# ns: h1               | ns: h2
  5#   192.168.0.1/24     |
  6#            eth0      |
  7#                      |       192.168.1.1/32
  8#            veth0 <---|---> veth1
  9# Validate source address selection for route without gateway
 10
 11source lib.sh
 12PAUSE_ON_FAIL=no
 13VERBOSE=0
 14ret=0
 15
 16################################################################################
 17# helpers
 18
 19log_test()
 20{
 21	local rc=$1
 22	local expected=$2
 23	local msg="$3"
 24
 25	if [ ${rc} -eq ${expected} ]; then
 26		printf "TEST: %-60s  [ OK ]\n" "${msg}"
 27		nsuccess=$((nsuccess+1))
 28	else
 29		ret=1
 30		nfail=$((nfail+1))
 31		printf "TEST: %-60s  [FAIL]\n" "${msg}"
 32		if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
 33			echo
 34			echo "hit enter to continue, 'q' to quit"
 35			read a
 36			[ "$a" = "q" ] && exit 1
 37		fi
 38	fi
 39
 40	[ "$VERBOSE" = "1" ] && echo
 41}
 42
 43run_cmd()
 44{
 45	local cmd="$*"
 46	local out
 47	local rc
 48
 49	if [ "$VERBOSE" = "1" ]; then
 50		echo "COMMAND: $cmd"
 51	fi
 52
 53	out=$(eval $cmd 2>&1)
 54	rc=$?
 55	if [ "$VERBOSE" = "1" -a -n "$out" ]; then
 56		echo "$out"
 57	fi
 58
 59	[ "$VERBOSE" = "1" ] && echo
 60
 61	return $rc
 62}
 63
 64################################################################################
 65# config
 66setup()
 67{
 68	setup_ns h1 h2
 69
 70	# Add a fake eth0 to support an ip address
 71	ip -n $h1 link add name eth0 type dummy
 72	ip -n $h1 link set eth0 up
 73	ip -n $h1 address add 192.168.0.1/24 dev eth0
 74
 75	# Configure veths (same @mac, arp off)
 76	ip -n $h1 link add name veth0 type veth peer name veth1 netns $h2
 77	ip -n $h1 link set veth0 up
 78
 79	ip -n $h2 link set veth1 up
 80
 81	# Configure @IP in the peer netns
 82	ip -n $h2 address add 192.168.1.1/32 dev veth1
 83	ip -n $h2 route add default dev veth1
 84
 85	# Add a nexthop without @gw and use it in a route
 86	ip -n $h1 nexthop add id 1 dev veth0
 87	ip -n $h1 route add 192.168.1.1 nhid 1
 88}
 89
 90cleanup()
 91{
 92	cleanup_ns $h1 $h2
 93}
 94
 95trap cleanup EXIT
 96
 97################################################################################
 98# main
 99
100while getopts :pv o
101do
102	case $o in
103		p) PAUSE_ON_FAIL=yes;;
104		v) VERBOSE=1;;
105	esac
106done
107
108setup
109
110run_cmd ip -netns $h1 route get 192.168.1.1
111log_test $? 0 "nexthop: get route with nexthop without gw"
112run_cmd ip netns exec $h1 ping -c1 192.168.1.1
113log_test $? 0 "nexthop: ping through nexthop without gw"
114
115exit $ret