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| 1 | +#!/bin/bash |
| 2 | +# SPDX-License-Identifier: GPL-2.0 |
| 3 | + |
| 4 | +source ./lib.sh |
| 5 | + |
| 6 | +PAUSE_ON_FAIL="no" |
| 7 | + |
| 8 | +# The trap function handler |
| 9 | +# |
| 10 | +exit_cleanup_all() |
| 11 | +{ |
| 12 | + cleanup_all_ns |
| 13 | + |
| 14 | + exit "${EXIT_STATUS}" |
| 15 | +} |
| 16 | + |
| 17 | +# Add fake IPv4 and IPv6 networks on the loopback device, to be used as |
| 18 | +# underlay by future GRE devices. |
| 19 | +# |
| 20 | +setup_basenet() |
| 21 | +{ |
| 22 | + ip -netns "${NS0}" link set dev lo up |
| 23 | + ip -netns "${NS0}" address add dev lo 192.0.2.10/24 |
| 24 | + ip -netns "${NS0}" address add dev lo 2001:db8::10/64 nodad |
| 25 | +} |
| 26 | + |
| 27 | +# Check if network device has an IPv6 link-local address assigned. |
| 28 | +# |
| 29 | +# Parameters: |
| 30 | +# |
| 31 | +# * $1: The network device to test |
| 32 | +# * $2: An extra regular expression that should be matched (to verify the |
| 33 | +# presence of extra attributes) |
| 34 | +# * $3: The expected return code from grep (to allow checking the absence of |
| 35 | +# a link-local address) |
| 36 | +# * $4: The user visible name for the scenario being tested |
| 37 | +# |
| 38 | +check_ipv6_ll_addr() |
| 39 | +{ |
| 40 | + local DEV="$1" |
| 41 | + local EXTRA_MATCH="$2" |
| 42 | + local XRET="$3" |
| 43 | + local MSG="$4" |
| 44 | + |
| 45 | + RET=0 |
| 46 | + set +e |
| 47 | + ip -netns "${NS0}" -6 address show dev "${DEV}" scope link | grep "fe80::" | grep -q "${EXTRA_MATCH}" |
| 48 | + check_err_fail "${XRET}" $? "" |
| 49 | + log_test "${MSG}" |
| 50 | + set -e |
| 51 | +} |
| 52 | + |
| 53 | +# Create a GRE device and verify that it gets an IPv6 link-local address as |
| 54 | +# expected. |
| 55 | +# |
| 56 | +# Parameters: |
| 57 | +# |
| 58 | +# * $1: The device type (gre, ip6gre, gretap or ip6gretap) |
| 59 | +# * $2: The local underlay IP address (can be an IPv4, an IPv6 or "any") |
| 60 | +# * $3: The remote underlay IP address (can be an IPv4, an IPv6 or "any") |
| 61 | +# * $4: The IPv6 interface identifier generation mode to use for the GRE |
| 62 | +# device (eui64, none, stable-privacy or random). |
| 63 | +# |
| 64 | +test_gre_device() |
| 65 | +{ |
| 66 | + local GRE_TYPE="$1" |
| 67 | + local LOCAL_IP="$2" |
| 68 | + local REMOTE_IP="$3" |
| 69 | + local MODE="$4" |
| 70 | + local ADDR_GEN_MODE |
| 71 | + local MATCH_REGEXP |
| 72 | + local MSG |
| 73 | + |
| 74 | + ip link add netns "${NS0}" name gretest type "${GRE_TYPE}" local "${LOCAL_IP}" remote "${REMOTE_IP}" |
| 75 | + |
| 76 | + case "${MODE}" in |
| 77 | + "eui64") |
| 78 | + ADDR_GEN_MODE=0 |
| 79 | + MATCH_REGEXP="" |
| 80 | + MSG="${GRE_TYPE}, mode: 0 (EUI64), ${LOCAL_IP} -> ${REMOTE_IP}" |
| 81 | + XRET=0 |
| 82 | + ;; |
| 83 | + "none") |
| 84 | + ADDR_GEN_MODE=1 |
| 85 | + MATCH_REGEXP="" |
| 86 | + MSG="${GRE_TYPE}, mode: 1 (none), ${LOCAL_IP} -> ${REMOTE_IP}" |
| 87 | + XRET=1 # No link-local address should be generated |
| 88 | + ;; |
| 89 | + "stable-privacy") |
| 90 | + ADDR_GEN_MODE=2 |
| 91 | + MATCH_REGEXP="stable-privacy" |
| 92 | + MSG="${GRE_TYPE}, mode: 2 (stable privacy), ${LOCAL_IP} -> ${REMOTE_IP}" |
| 93 | + XRET=0 |
| 94 | + # Initialise stable_secret (required for stable-privacy mode) |
| 95 | + ip netns exec "${NS0}" sysctl -qw net.ipv6.conf.gretest.stable_secret="2001:db8::abcd" |
| 96 | + ;; |
| 97 | + "random") |
| 98 | + ADDR_GEN_MODE=3 |
| 99 | + MATCH_REGEXP="stable-privacy" |
| 100 | + MSG="${GRE_TYPE}, mode: 3 (random), ${LOCAL_IP} -> ${REMOTE_IP}" |
| 101 | + XRET=0 |
| 102 | + ;; |
| 103 | + esac |
| 104 | + |
| 105 | + # Check that IPv6 link-local address is generated when device goes up |
| 106 | + ip netns exec "${NS0}" sysctl -qw net.ipv6.conf.gretest.addr_gen_mode="${ADDR_GEN_MODE}" |
| 107 | + ip -netns "${NS0}" link set dev gretest up |
| 108 | + check_ipv6_ll_addr gretest "${MATCH_REGEXP}" "${XRET}" "config: ${MSG}" |
| 109 | + |
| 110 | + # Now disable link-local address generation |
| 111 | + ip -netns "${NS0}" link set dev gretest down |
| 112 | + ip netns exec "${NS0}" sysctl -qw net.ipv6.conf.gretest.addr_gen_mode=1 |
| 113 | + ip -netns "${NS0}" link set dev gretest up |
| 114 | + |
| 115 | + # Check that link-local address generation works when re-enabled while |
| 116 | + # the device is already up |
| 117 | + ip netns exec "${NS0}" sysctl -qw net.ipv6.conf.gretest.addr_gen_mode="${ADDR_GEN_MODE}" |
| 118 | + check_ipv6_ll_addr gretest "${MATCH_REGEXP}" "${XRET}" "update: ${MSG}" |
| 119 | + |
| 120 | + ip -netns "${NS0}" link del dev gretest |
| 121 | +} |
| 122 | + |
| 123 | +test_gre4() |
| 124 | +{ |
| 125 | + local GRE_TYPE |
| 126 | + local MODE |
| 127 | + |
| 128 | + for GRE_TYPE in "gre" "gretap"; do |
| 129 | + printf "\n####\nTesting IPv6 link-local address generation on ${GRE_TYPE} devices\n####\n\n" |
| 130 | + |
| 131 | + for MODE in "eui64" "none" "stable-privacy" "random"; do |
| 132 | + test_gre_device "${GRE_TYPE}" 192.0.2.10 192.0.2.11 "${MODE}" |
| 133 | + test_gre_device "${GRE_TYPE}" any 192.0.2.11 "${MODE}" |
| 134 | + test_gre_device "${GRE_TYPE}" 192.0.2.10 any "${MODE}" |
| 135 | + done |
| 136 | + done |
| 137 | +} |
| 138 | + |
| 139 | +test_gre6() |
| 140 | +{ |
| 141 | + local GRE_TYPE |
| 142 | + local MODE |
| 143 | + |
| 144 | + for GRE_TYPE in "ip6gre" "ip6gretap"; do |
| 145 | + printf "\n####\nTesting IPv6 link-local address generation on ${GRE_TYPE} devices\n####\n\n" |
| 146 | + |
| 147 | + for MODE in "eui64" "none" "stable-privacy" "random"; do |
| 148 | + test_gre_device "${GRE_TYPE}" 2001:db8::10 2001:db8::11 "${MODE}" |
| 149 | + test_gre_device "${GRE_TYPE}" any 2001:db8::11 "${MODE}" |
| 150 | + test_gre_device "${GRE_TYPE}" 2001:db8::10 any "${MODE}" |
| 151 | + done |
| 152 | + done |
| 153 | +} |
| 154 | + |
| 155 | +usage() |
| 156 | +{ |
| 157 | + echo "Usage: $0 [-p]" |
| 158 | + exit 1 |
| 159 | +} |
| 160 | + |
| 161 | +while getopts :p o |
| 162 | +do |
| 163 | + case $o in |
| 164 | + p) PAUSE_ON_FAIL="yes";; |
| 165 | + *) usage;; |
| 166 | + esac |
| 167 | +done |
| 168 | + |
| 169 | +setup_ns NS0 |
| 170 | + |
| 171 | +set -e |
| 172 | +trap exit_cleanup_all EXIT |
| 173 | + |
| 174 | +setup_basenet |
| 175 | + |
| 176 | +test_gre4 |
| 177 | +test_gre6 |
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