350 lines
8.4 KiB
Bash
350 lines
8.4 KiB
Bash
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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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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# | 192.0.2.1/28 | |
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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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# | 192.0.2.2/28 |
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# | |
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# | + g1a (gre) |
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# | loc=192.0.2.65 |
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# | rem=192.0.2.66 --. |
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# | tos=inherit | |
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# | .------------------' |
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# | | |
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# | v |
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# | + $ul1.111 (vlan) |
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# | | 192.0.2.129/28 |
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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 + $ul2 |
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# | _______| |
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# | / |
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# | / |
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# | + $ul2.111 (vlan) |
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# | ^ 192.0.2.130/28 |
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# | | |
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# | | |
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# | '------------------. |
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# | + g2a (gre) | |
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# | loc=192.0.2.66 | |
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# | rem=192.0.2.65 --' |
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# | tos=inherit |
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# | |
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# | $ol2 + |
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# | 192.0.2.17/28 | |
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# | VRF v$ol2 | |
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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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# | 192.0.2.18/28 |
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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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# | 192.0.2.1/28 | |
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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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# | | $ol1 + | |
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# | | 192.0.2.2/28 | |
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# | | | |
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# | | + g1a (gre) | |
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# | | rem=192.0.2.66 | |
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# | | tos=inherit | |
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# | | loc=192.0.2.65 | |
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# | | ^ | |
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# | | VRF v$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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# | | | | |
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# | | v | |
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# | | dummy1 + | |
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# | | 192.0.2.65 | |
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# | | .-------' | |
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# | | | | |
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# | | v | |
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# | | + $ul1.111 (vlan) | |
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# | | | 192.0.2.129/28 | |
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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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# | | | $ul2.111 (vlan) | |
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# | | + 192.0.2.130/28 | |
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# | | ^ | |
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# | | | | |
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# | | '-------. | |
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# | | dummy2 + | |
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# | | 192.0.2.66 | |
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# | | ^ | |
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# | | | | |
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# | | | | |
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# | | VRF v$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 (gre)+ | |
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# | | loc=192.0.2.66 | |
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# | | rem=192.0.2.65 | |
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# | | tos=inherit | |
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# | | | |
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# | | $ol2 + | |
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# | | 192.0.2.17/28 | | |
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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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# | 192.0.2.18/28 |
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# +---------------------------+
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source lib.sh
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h1_create()
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{
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simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64
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ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2
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}
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h1_destroy()
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{
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ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2
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simple_if_fini $h1 192.0.2.1/28
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}
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h2_create()
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{
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simple_if_init $h2 192.0.2.18/28
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ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17
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}
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h2_destroy()
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{
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ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
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simple_if_fini $h2 192.0.2.18/28
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}
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sw1_flat_create()
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{
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local type=$1; shift
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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 "192.0.2.2/28"
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ip link set dev $ul1 up
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vlan_create $ul1 111 "" 192.0.2.129/28
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tunnel_create g1a $type 192.0.2.65 192.0.2.66 tos inherit "$@"
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ip link set dev g1a up
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__addr_add_del g1a add "192.0.2.65/32"
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ip route add 192.0.2.66/32 via 192.0.2.130
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ip route add 192.0.2.16/28 nexthop 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 route del 192.0.2.16/28
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ip route del 192.0.2.66/32 via 192.0.2.130
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__simple_if_fini g1a 192.0.2.65/32
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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 192.0.2.2/28
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}
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sw2_flat_create()
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{
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local type=$1; shift
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local ol2=$1; shift
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local ul2=$1; shift
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simple_if_init $ol2 192.0.2.17/28
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__simple_if_init $ul2 v$ol2
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vlan_create $ul2 111 v$ol2 192.0.2.130/28
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tunnel_create g2a $type 192.0.2.66 192.0.2.65 tos inherit dev v$ol2 \
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"$@"
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__simple_if_init g2a v$ol2 192.0.2.66/32
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ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129
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ip route add vrf v$ol2 192.0.2.0/28 nexthop 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=$1; shift
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ip route del vrf v$ol2 192.0.2.0/28
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ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129
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__simple_if_fini g2a 192.0.2.66/32
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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 192.0.2.17/28
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}
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sw1_hierarchical_create()
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{
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local type=$1; shift
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local ol1=$1; shift
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local ul1=$1; shift
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simple_if_init $ol1 192.0.2.2/28
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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 192.0.2.65/32
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vlan_create $ul1 111 v$ul1 192.0.2.129/28
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tunnel_create g1a $type 192.0.2.65 192.0.2.66 tos inherit dev dummy1 \
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"$@"
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ip link set dev g1a master v$ol1
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ip route add vrf v$ul1 192.0.2.66/32 via 192.0.2.130
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ip route add vrf v$ol1 192.0.2.16/28 nexthop 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=$1; shift
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ip route del vrf v$ol1 192.0.2.16/28
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ip route del vrf v$ul1 192.0.2.66/32
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tunnel_destroy g1a
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vlan_destroy $ul1 111
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__simple_if_fini dummy1 192.0.2.65/32
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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 192.0.2.2/28
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}
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sw2_hierarchical_create()
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{
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local type=$1; shift
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local ol2=$1; shift
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local ul2=$1; shift
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simple_if_init $ol2 192.0.2.17/28
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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 192.0.2.66/32
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vlan_create $ul2 111 v$ul2 192.0.2.130/28
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tunnel_create g2a $type 192.0.2.66 192.0.2.65 tos inherit dev dummy2 \
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"$@"
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ip link set dev g2a master v$ol2
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ip route add vrf v$ul2 192.0.2.65/32 via 192.0.2.129
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ip route add vrf v$ol2 192.0.2.0/28 nexthop 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=$1; shift
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ip route del vrf v$ol2 192.0.2.0/28
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ip route del vrf v$ul2 192.0.2.65/32
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tunnel_destroy g2a
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vlan_destroy $ul2 111
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__simple_if_fini dummy2 192.0.2.66/32
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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 192.0.2.17/28
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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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local encap=$1; shift
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RET=0
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ping_do $h1 192.0.2.18 "-s 1800 -w 3"
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check_fail $? "ping $encap should not pass with size 1800"
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RET=0
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topo_mtu_change 2000
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ping_do $h1 192.0.2.18 "-s 1800 -w 3"
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check_err $?
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log_test "ping $encap packet size 1800 after MTU change"
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}
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