#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Handles creation and destruction of IP-in-IP or GRE tunnels over the given
# topology. Supports both flat and hierarchical models.
#
# Flat Model:
# Overlay and underlay share the same VRF.
# SW1 uses default VRF so tunnel has no bound dev.
# SW2 uses non-default VRF tunnel has a bound dev.
# +-------------------------+
# | H1 |
# | $h1 + |
# | 192.0.2.1/28 | |
# +-------------------|-----+
# |
# +-------------------|-----+
# | SW1 | |
# | $ol1 + |
# | 192.0.2.2/28 |
# | |
# | + g1a (gre) |
# | loc=192.0.2.65 |
# | rem=192.0.2.66 --. |
# | tos=inherit | |
# | .------------------' |
# | | |
# | v |
# | + $ul1.111 (vlan) |
# | | 192.0.2.129/28 |
# | \ |
# | \_______ |
# | | |
# |VRF default + $ul1 |
# +------------|------------+
# |
# +------------|------------+
# | SW2 + $ul2 |
# | _______| |
# | / |
# | / |
# | + $ul2.111 (vlan) |
# | ^ 192.0.2.130/28 |
# | | |
# | | |
# | '------------------. |
# | + g2a (gre) | |
# | loc=192.0.2.66 | |
# | rem=192.0.2.65 --' |
# | tos=inherit |
# | |
# | $ol2 + |
# | 192.0.2.17/28 | |
# | VRF v$ol2 | |
# +-------------------|-----+
# |
# +-------------------|-----+
# | H2 | |
# | $h2 + |
# | 192.0.2.18/28 |
# +-------------------------+
#
# Hierarchical model:
# The tunnel is bound to a device in a different VRF
#
# +---------------------------+
# | H1 |
# | $h1 + |
# | 192.0.2.1/28 | |
# +-------------------|-------+
# |
# +-------------------|-------+
# | SW1 | |
# | +-----------------|-----+ |
# | | $ol1 + | |
# | | 192.0.2.2/28 | |
# | | | |
# | | + g1a (gre) | |
# | | rem=192.0.2.66 | |
# | | tos=inherit | |
# | | loc=192.0.2.65 | |
# | | ^ | |
# | | VRF v$ol1 | | |
# | +-----------|-----------+ |
# | | |
# | +-----------|-----------+ |
# | | VRF v$ul1 | | |
# | | | | |
# | | | | |
# | | v | |
# | | dummy1 + | |
# | | 192.0.2.65 | |
# | | .-------' | |
# | | | | |
# | | v | |
# | | + $ul1.111 (vlan) | |
# | | | 192.0.2.129/28 | |
# | | \ | |
# | | \_____ | |
# | | | | |
# | | + $ul1 | |
# | +----------|------------+ |
# +------------|--------------+
# |
# +------------|--------------+
# | SW2 | |
# | +----------|------------+ |
# | | + $ul2 | |
# | | _____| | |
# | | / | |
# | | / | |
# | | | $ul2.111 (vlan) | |
# | | + 192.0.2.130/28 | |
# | | ^ | |
# | | | | |
# | | '-------. | |
# | | dummy2 + | |
# | | 192.0.2.66 | |
# | | ^ | |
# | | | | |
# | | | | |
# | | VRF v$ul2 | | |
# | +-----------|-----------+ |
# | | |
# | +-----------|-----------+ |
# | | VRF v$ol2 | | |
# | | | | |
# | | v | |
# | | g2a (gre)+ | |
# | | loc=192.0.2.66 | |
# | | rem=192.0.2.65 | |
# | | tos=inherit | |
# | | | |
# | | $ol2 + | |
# | | 192.0.2.17/28 | | |
# | +-----------------|-----+ |
# +-------------------|-------+
# |
# +-------------------|-------+
# | H2 | |
# | $h2 + |
# | 192.0.2.18/28 |
# +---------------------------+
h1_create()
{
simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64
ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2
}
h1_destroy()
{
ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2
simple_if_fini $h1 192.0.2.1/28
}
h2_create()
{
simple_if_init $h2 192.0.2.18/28
ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17
}
h2_destroy()
{
ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
simple_if_fini $h2 192.0.2.18/28
}
sw1_flat_create()
{
local type=$1; shift
local ol1=$1; shift
local ul1=$1; shift
ip link set dev $ol1 up
__addr_add_del $ol1 add "192.0.2.2/28"
ip link set dev $ul1 up
vlan_create $ul1 111 "" 192.0.2.129/28
tunnel_create g1a $type 192.0.2.65 192.0.2.66 tos inherit "$@"
ip link set dev g1a up
__addr_add_del g1a add "192.0.2.65/32"
ip route add 192.0.2.66/32 via 192.0.2.130
ip route add 192.0.2.16/28 nexthop dev g1a
}
sw1_flat_destroy()
{
local ol1=$1; shift
local ul1=$1; shift
ip route del 192.0.2.16/28
ip route del 192.0.2.66/32 via 192.0.2.130
__simple_if_fini g1a 192.0.2.65/32
tunnel_destroy g1a
vlan_destroy $ul1 111
__simple_if_fini $ul1
__simple_if_fini $ol1 192.0.2.2/28
}
sw2_flat_create()
{
local type=$1; shift
local ol2=$1; shift
local ul2=$1; shift
simple_if_init $ol2 192.0.2.17/28
__simple_if_init $ul2 v$ol2
vlan_create $ul2 111 v$ol2 192.0.2.130/28
tunnel_create g2a $type 192.0.2.66 192.0.2.65 tos inherit dev v$ol2 \
"$@"
__simple_if_init g2a v$ol2 192.0.2.66/32
ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129
ip route add vrf v$ol2 192.0.2.0/28 nexthop dev g2a
}
sw2_flat_destroy()
{
local ol2=$1; shift
local ul2=$1; shift
ip route del vrf v$ol2 192.0.2.0/28
ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129
__simple_if_fini g2a 192.0.2.66/32
tunnel_destroy g2a
vlan_destroy $ul2 111
__simple_if_fini $ul2
simple_if_fini $ol2 192.0.2.17/28
}
sw1_hierarchical_create()
{
local type=$1; shift
local ol1=$1; shift
local ul1=$1; shift
simple_if_init $ol1 192.0.2.2/28
simple_if_init $ul1
ip link add name dummy1 type dummy
__simple_if_init dummy1 v$ul1 192.0.2.65/32
vlan_create $ul1 111 v$ul1 192.0.2.129/28
tunnel_create g1a $type 192.0.2.65 192.0.2.66 tos inherit dev dummy1 \
"$@"
ip link set dev g1a master v$ol1
ip route add vrf v$ul1 192.0.2.66/32 via 192.0.2.130
ip route add vrf v$ol1 192.0.2.16/28 nexthop dev g1a
}
sw1_hierarchical_destroy()
{
local ol1=$1; shift
local ul1=$1; shift
ip route del vrf v$ol1 192.0.2.16/28
ip route del vrf v$ul1 192.0.2.66/32
tunnel_destroy g1a
vlan_destroy $ul1 111
__simple_if_fini dummy1 192.0.2.65/32
ip link del dev dummy1
simple_if_fini $ul1
simple_if_fini $ol1 192.0.2.2/28
}
sw2_hierarchical_create()
{
local type=$1; shift
local ol2=$1; shift
local ul2=$1; shift
simple_if_init $ol2 192.0.2.17/28
simple_if_init $ul2
ip link add name dummy2 type dummy
__simple_if_init dummy2 v$ul2 192.0.2.66/32
vlan_create $ul2 111 v$ul2 192.0.2.130/28
tunnel_create g2a $type 192.0.2.66 192.0.2.65 tos inherit dev dummy2 \
"$@"
ip link set dev g2a master v$ol2
ip route add vrf v$ul2 192.0.2.65/32 via 192.0.2.129
ip route add vrf v$ol2 192.0.2.0/28 nexthop dev g2a
}
sw2_hierarchical_destroy()
{
local ol2=$1; shift
local ul2=$1; shift
ip route del vrf v$ol2 192.0.2.0/28
ip route del vrf v$ul2 192.0.2.65/32
tunnel_destroy g2a
vlan_destroy $ul2 111
__simple_if_fini dummy2 192.0.2.66/32
ip link del dev dummy2
simple_if_fini $ul2
simple_if_fini $ol2 192.0.2.17/28
}
topo_mtu_change()
{
local mtu=$1
ip link set mtu $mtu dev $h1
ip link set mtu $mtu dev $ol1
ip link set mtu $mtu dev g1a
ip link set mtu $mtu dev $ul1
ip link set mtu $mtu dev $ul1.111
ip link set mtu $mtu dev $h2
ip link set mtu $mtu dev $ol2
ip link set mtu $mtu dev g2a
ip link set mtu $mtu dev $ul2
ip link set mtu $mtu dev $ul2.111
}
test_mtu_change()
{
local encap=$1; shift
RET=0
ping_do $h1 192.0.2.18 "-s 1800 -w 3"
check_fail $? "ping $encap should not pass with size 1800"
RET=0
topo_mtu_change 2000
ping_do $h1 192.0.2.18 "-s 1800 -w 3"
check_err $?
log_test "ping $encap packet size 1800 after MTU change"
}
Codebase Browser
linux