439 lines
14 KiB
Bash
439 lines
14 KiB
Bash
# SPDX-License-Identifier: GPL-2.0
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#!/bin/bash
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# Handles creation and destruction of IP-in-IP or GRE tunnels over the given
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# topology. Supports both flat and hierarchical models.
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#
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# Flat Model:
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# Overlay and underlay share the same VRF.
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# SW1 uses default VRF so tunnel has no bound dev.
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# SW2 uses non-default VRF tunnel has a bound dev.
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# +--------------------------------+
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# | H1 |
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# | $h1 + |
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# | 198.51.100.1/24 | |
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# | 2001:db8:1::1/64 | |
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# +-------------------------|------+
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# |
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# +-------------------------|-------------------+
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# | SW1 | |
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# | $ol1 + |
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# | 198.51.100.2/24 |
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# | 2001:db8:1::2/64 |
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# | |
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# | + g1a (ip6gre) |
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# | loc=2001:db8:3::1 |
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# | rem=2001:db8:3::2 --. |
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# | tos=inherit | |
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# | . |
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# | .--------------------- |
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# | | |
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# | v |
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# | + $ul1.111 (vlan) |
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# | | 2001:db8:10::1/64 |
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# | \ |
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# | \____________ |
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# | | |
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# | VRF default + $ul1 |
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# +---------------------|-----------------------+
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# |
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# +---------------------|-----------------------+
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# | SW2 | |
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# | $ul2 + |
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# | ___________| |
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# | / |
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# | / |
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# | + $ul2.111 (vlan) |
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# | ^ 2001:db8:10::2/64 |
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# | | |
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# | | |
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# | '----------------------. |
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# | + g2a (ip6gre) | |
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# | loc=2001:db8:3::2 | |
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# | rem=2001:db8:3::1 --' |
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# | tos=inherit |
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# | |
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# | + $ol2 |
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# | | 203.0.113.2/24 |
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# | VRF v$ol2 | 2001:db8:2::2/64 |
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# +---------------------|-----------------------+
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# +---------------------|----------+
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# | H2 | |
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# | $h2 + |
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# | 203.0.113.1/24 |
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# | 2001:db8:2::1/64 |
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# +--------------------------------+
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#
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# Hierarchical model:
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# The tunnel is bound to a device in a different VRF
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#
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# +--------------------------------+
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# | H1 |
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# | $h1 + |
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# | 198.51.100.1/24 | |
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# | 2001:db8:1::1/64 | |
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# +-------------------------|------+
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# |
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# +-------------------------|-------------------+
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# | SW1 | |
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# | +-----------------------|-----------------+ |
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# | | $ol1 + | |
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# | | 198.51.100.2/24 | |
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# | | 2001:db8:1::2/64 | |
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# | | | |
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# | | + g1a (ip6gre) | |
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# | | loc=2001:db8:3::1 | |
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# | | rem=2001:db8:3::2 | |
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# | | tos=inherit | |
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# | | ^ | |
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# | | VRF v$ol1 | | |
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# | +--------------------|--------------------+ |
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# | | |
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# | +--------------------|--------------------+ |
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# | | VRF v$ul1 | | |
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# | | | | |
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# | | v | |
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# | | dummy1 + | |
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# | | 2001:db8:3::1/64 | |
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# | | .-----------' | |
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# | | | | |
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# | | v | |
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# | | + $ul1.111 (vlan) | |
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# | | | 2001:db8:10::1/64 | |
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# | | \ | |
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# | | \__________ | |
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# | | | | |
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# | | + $ul1 | |
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# | +---------------------|-------------------+ |
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# +-----------------------|---------------------+
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# |
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# +-----------------------|---------------------+
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# | SW2 | |
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# | +---------------------|-------------------+ |
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# | | + $ul2 | |
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# | | _____| | |
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# | | / | |
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# | | / | |
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# | | | $ul2.111 (vlan) | |
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# | | + 2001:db8:10::2/64 | |
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# | | ^ | |
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# | | | | |
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# | | '------. | |
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# | | dummy2 + | |
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# | | 2001:db8:3::2/64 | |
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# | | ^ | |
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# | | | | |
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# | | | | |
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# | | VRF v$ul2 | | |
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# | +---------------------|-------------------+ |
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# | | |
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# | +---------------------|-------------------+ |
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# | | VRF v$ol2 | | |
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# | | | | |
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# | | v | |
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# | | g2a (ip6gre) + | |
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# | | loc=2001:db8:3::2 | |
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# | | rem=2001:db8:3::1 | |
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# | | tos=inherit | |
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# | | | |
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# | | $ol2 + | |
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# | | 203.0.113.2/24 | | |
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# | | 2001:db8:2::2/64 | | |
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# | +---------------------|-------------------+ |
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# +-----------------------|---------------------+
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# |
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# +-----------------------|--------+
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# | H2 | |
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# | $h2 + |
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# | 203.0.113.1/24 |
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# | 2001:db8:2::1/64 |
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# +--------------------------------+
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source lib.sh
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source tc_common.sh
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h1_create()
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{
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simple_if_init $h1 198.51.100.1/24 2001:db8:1::1/64
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ip route add vrf v$h1 203.0.113.0/24 via 198.51.100.2
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ip -6 route add vrf v$h1 2001:db8:2::/64 via 2001:db8:1::2
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}
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h1_destroy()
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{
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ip -6 route del vrf v$h1 2001:db8:2::/64 via 2001:db8:1::2
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ip route del vrf v$h1 203.0.113.0/24 via 198.51.100.2
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simple_if_fini $h1 198.51.100.1/24 2001:db8:1::1/64
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}
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h2_create()
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{
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simple_if_init $h2 203.0.113.1/24 2001:db8:2::1/64
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ip route add vrf v$h2 198.51.100.0/24 via 203.0.113.2
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ip -6 route add vrf v$h2 2001:db8:1::/64 via 2001:db8:2::2
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}
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h2_destroy()
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{
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ip -6 route del vrf v$h2 2001:db8:1::/64 via 2001:db8:2::2
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ip route del vrf v$h2 198.51.100.0/24 via 203.0.113.2
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simple_if_fini $h2 203.0.113.1/24 2001:db8:2::1/64
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}
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sw1_flat_create()
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{
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local ol1=$1; shift
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local ul1=$1; shift
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ip link set dev $ol1 up
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__addr_add_del $ol1 add 198.51.100.2/24 2001:db8:1::2/64
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ip link set dev $ul1 up
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vlan_create $ul1 111 "" 2001:db8:10::1/64
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tunnel_create g1a ip6gre 2001:db8:3::1 2001:db8:3::2 tos inherit \
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ttl inherit "$@"
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ip link set dev g1a up
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__addr_add_del g1a add "2001:db8:3::1/128"
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ip -6 route add 2001:db8:3::2/128 via 2001:db8:10::2
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ip route add 203.0.113.0/24 dev g1a
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ip -6 route add 2001:db8:2::/64 dev g1a
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}
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sw1_flat_destroy()
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{
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local ol1=$1; shift
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local ul1=$1; shift
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ip -6 route del 2001:db8:2::/64
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ip route del 203.0.113.0/24
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ip -6 route del 2001:db8:3::2/128 via 2001:db8:10::2
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__simple_if_fini g1a 2001:db8:3::1/128
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tunnel_destroy g1a
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vlan_destroy $ul1 111
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__simple_if_fini $ul1
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__simple_if_fini $ol1 198.51.100.2/24 2001:db8:1::2/64
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}
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sw2_flat_create()
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{
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local ol2=$1; shift
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local ul2=$1; shift
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simple_if_init $ol2 203.0.113.2/24 2001:db8:2::2/64
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__simple_if_init $ul2 v$ol2
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vlan_create $ul2 111 v$ol2 2001:db8:10::2/64
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tunnel_create g2a ip6gre 2001:db8:3::2 2001:db8:3::1 tos inherit \
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ttl inherit dev v$ol2 "$@"
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__simple_if_init g2a v$ol2 2001:db8:3::2/128
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# Replace neighbor to avoid 1 dropped packet due to "unresolved neigh"
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ip neigh replace dev $ol2 203.0.113.1 lladdr $(mac_get $h2)
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ip -6 neigh replace dev $ol2 2001:db8:2::1 lladdr $(mac_get $h2)
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ip -6 route add vrf v$ol2 2001:db8:3::1/128 via 2001:db8:10::1
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ip route add vrf v$ol2 198.51.100.0/24 dev g2a
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ip -6 route add vrf v$ol2 2001:db8:1::/64 dev g2a
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}
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sw2_flat_destroy()
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{
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local ol2=$1; shift
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local ul2=$1; shift
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ip -6 route del vrf v$ol2 2001:db8:2::/64
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ip route del vrf v$ol2 198.51.100.0/24
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ip -6 route del vrf v$ol2 2001:db8:3::1/128 via 2001:db8:10::1
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__simple_if_fini g2a 2001:db8:3::2/128
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tunnel_destroy g2a
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vlan_destroy $ul2 111
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__simple_if_fini $ul2
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simple_if_fini $ol2 203.0.113.2/24 2001:db8:2::2/64
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}
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sw1_hierarchical_create()
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{
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local ol1=$1; shift
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local ul1=$1; shift
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simple_if_init $ol1 198.51.100.2/24 2001:db8:1::2/64
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simple_if_init $ul1
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ip link add name dummy1 type dummy
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__simple_if_init dummy1 v$ul1 2001:db8:3::1/64
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vlan_create $ul1 111 v$ul1 2001:db8:10::1/64
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tunnel_create g1a ip6gre 2001:db8:3::1 2001:db8:3::2 tos inherit \
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ttl inherit dev dummy1 "$@"
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ip link set dev g1a master v$ol1
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ip -6 route add vrf v$ul1 2001:db8:3::2/128 via 2001:db8:10::2
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ip route add vrf v$ol1 203.0.113.0/24 dev g1a
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ip -6 route add vrf v$ol1 2001:db8:2::/64 dev g1a
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}
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sw1_hierarchical_destroy()
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{
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local ol1=$1; shift
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local ul1=$1; shift
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ip -6 route del vrf v$ol1 2001:db8:2::/64
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ip route del vrf v$ol1 203.0.113.0/24
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ip -6 route del vrf v$ul1 2001:db8:3::2/128
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tunnel_destroy g1a
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vlan_destroy $ul1 111
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__simple_if_fini dummy1 2001:db8:3::1/64
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ip link del dev dummy1
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simple_if_fini $ul1
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simple_if_fini $ol1 198.51.100.2/24 2001:db8:1::2/64
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}
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sw2_hierarchical_create()
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{
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local ol2=$1; shift
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local ul2=$1; shift
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simple_if_init $ol2 203.0.113.2/24 2001:db8:2::2/64
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simple_if_init $ul2
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ip link add name dummy2 type dummy
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__simple_if_init dummy2 v$ul2 2001:db8:3::2/64
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vlan_create $ul2 111 v$ul2 2001:db8:10::2/64
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tunnel_create g2a ip6gre 2001:db8:3::2 2001:db8:3::1 tos inherit \
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ttl inherit dev dummy2 "$@"
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ip link set dev g2a master v$ol2
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# Replace neighbor to avoid 1 dropped packet due to "unresolved neigh"
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ip neigh replace dev $ol2 203.0.113.1 lladdr $(mac_get $h2)
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ip -6 neigh replace dev $ol2 2001:db8:2::1 lladdr $(mac_get $h2)
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ip -6 route add vrf v$ul2 2001:db8:3::1/128 via 2001:db8:10::1
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ip route add vrf v$ol2 198.51.100.0/24 dev g2a
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ip -6 route add vrf v$ol2 2001:db8:1::/64 dev g2a
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}
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sw2_hierarchical_destroy()
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{
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local ol2=$1; shift
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local ul2=$1; shift
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ip -6 route del vrf v$ol2 2001:db8:2::/64
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ip route del vrf v$ol2 198.51.100.0/24
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ip -6 route del vrf v$ul2 2001:db8:3::1/128
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tunnel_destroy g2a
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vlan_destroy $ul2 111
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__simple_if_fini dummy2 2001:db8:3::2/64
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ip link del dev dummy2
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simple_if_fini $ul2
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simple_if_fini $ol2 203.0.113.2/24 2001:db8:2::2/64
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}
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test_traffic_ip4ip6()
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{
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RET=0
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h1mac=$(mac_get $h1)
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ol1mac=$(mac_get $ol1)
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tc qdisc add dev $ul1 clsact
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tc filter add dev $ul1 egress proto all pref 1 handle 101 \
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flower $TC_FLAG action pass
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tc qdisc add dev $ol2 clsact
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tc filter add dev $ol2 egress protocol ipv4 pref 1 handle 101 \
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flower $TC_FLAG dst_ip 203.0.113.1 action pass
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$MZ $h1 -c 1000 -p 64 -a $h1mac -b $ol1mac -A 198.51.100.1 \
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-B 203.0.113.1 -t ip -q -d 1msec
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# Check ports after encap and after decap.
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tc_check_at_least_x_packets "dev $ul1 egress" 101 1000
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check_err $? "Packets did not go through $ul1, tc_flag = $TC_FLAG"
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tc_check_at_least_x_packets "dev $ol2 egress" 101 1000
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check_err $? "Packets did not go through $ol2, tc_flag = $TC_FLAG"
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log_test "$@"
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tc filter del dev $ol2 egress protocol ipv4 pref 1 handle 101 flower
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tc qdisc del dev $ol2 clsact
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tc filter del dev $ul1 egress proto all pref 1 handle 101 flower
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tc qdisc del dev $ul1 clsact
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}
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test_traffic_ip6ip6()
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{
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RET=0
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h1mac=$(mac_get $h1)
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ol1mac=$(mac_get $ol1)
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tc qdisc add dev $ul1 clsact
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tc filter add dev $ul1 egress proto all pref 1 handle 101 \
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flower $TC_FLAG action pass
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tc qdisc add dev $ol2 clsact
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tc filter add dev $ol2 egress protocol ipv6 pref 1 handle 101 \
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flower $TC_FLAG dst_ip 2001:db8:2::1 action pass
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$MZ -6 $h1 -c 1000 -p 64 -a $h1mac -b $ol1mac -A 2001:db8:1::1 \
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-B 2001:db8:2::1 -t ip -q -d 1msec
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# Check ports after encap and after decap.
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tc_check_at_least_x_packets "dev $ul1 egress" 101 1000
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check_err $? "Packets did not go through $ul1, tc_flag = $TC_FLAG"
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tc_check_at_least_x_packets "dev $ol2 egress" 101 1000
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check_err $? "Packets did not go through $ol2, tc_flag = $TC_FLAG"
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log_test "$@"
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tc filter del dev $ol2 egress protocol ipv6 pref 1 handle 101 flower
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tc qdisc del dev $ol2 clsact
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tc filter del dev $ul1 egress proto all pref 1 handle 101 flower
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tc qdisc del dev $ul1 clsact
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}
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topo_mtu_change()
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{
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local mtu=$1
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ip link set mtu $mtu dev $h1
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ip link set mtu $mtu dev $ol1
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ip link set mtu $mtu dev g1a
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ip link set mtu $mtu dev $ul1
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ip link set mtu $mtu dev $ul1.111
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ip link set mtu $mtu dev $h2
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ip link set mtu $mtu dev $ol2
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ip link set mtu $mtu dev g2a
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ip link set mtu $mtu dev $ul2
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ip link set mtu $mtu dev $ul2.111
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}
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test_mtu_change()
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{
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RET=0
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ping6_do $h1 2001:db8:2::1 "-s 1800 -w 3"
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check_fail $? "ping GRE IPv6 should not pass with packet size 1800"
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RET=0
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topo_mtu_change 2000
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ping6_do $h1 2001:db8:2::1 "-s 1800 -w 3"
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check_err $?
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log_test "ping GRE IPv6, packet size 1800 after MTU change"
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}
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