Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
net: Test for IPv4/IPv6 PMTU discovery with ECMP routing on the path
- Loading branch information
Jakub Sitnicki
committed
Mar 8, 2017
1 parent
24a7e64
commit ccb85e6
Showing
8 changed files
with
635 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| #!/bin/bash | ||
|
|
||
| A () { ip netns exec ${FUNCNAME[0]} "$@"; } | ||
| B () { ip netns exec ${FUNCNAME[0]} "$@"; } | ||
| C () { ip netns exec ${FUNCNAME[0]} "$@"; } | ||
| D () { ip netns exec ${FUNCNAME[0]} "$@"; } | ||
| E () { ip netns exec ${FUNCNAME[0]} "$@"; } | ||
| Fd() { ip netns exec ${FUNCNAME[0]} "$@"; } | ||
| Fe() { ip netns exec ${FUNCNAME[0]} "$@"; } | ||
|
|
||
| color_red() { echo -en '\033[1;31m'; } | ||
| color_green() { echo -en '\033[1;32m'; } | ||
| color_off() { echo -en '\033[0m'; } | ||
|
|
||
| log() { echo " * $@"; } | ||
| msg_err() { color_red; echo "$@"; color_off; return 1;} | ||
| msg_ok() { color_green; echo "$@"; color_off; return 0; } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| #!/bin/bash | ||
|
|
||
| set -e | ||
|
|
||
| run_tests() | ||
| { | ||
| local basedir=$(dirname "$0") | ||
|
|
||
| trap "$basedir/teardown.sh \$?" EXIT | ||
| $basedir/setup.sh | ||
| $basedir/test-ping.sh | ||
| $basedir/test-http.sh | ||
| } | ||
|
|
||
| run_tests |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,255 @@ | ||
| #!/bin/bash | ||
|
|
||
| set -e | ||
|
|
||
| basedir=$(dirname "$0") | ||
|
|
||
| . $basedir/vars.sh | ||
| . $basedir/funcs.sh | ||
|
|
||
|
|
||
| create_namespaces() | ||
| { | ||
| log "Creating namespaces" | ||
|
|
||
| ip netns add A | ||
| ip netns add B | ||
| ip netns add C | ||
| ip netns add D | ||
| ip netns add E | ||
| ip netns add Fd | ||
| ip netns add Fe | ||
| } | ||
|
|
||
| link_namespaces() | ||
| { | ||
| log "Linking namespaces" | ||
|
|
||
| ip li add AB type veth peer name BA | ||
| ip li set dev AB netns A | ||
| ip li set dev BA netns B | ||
|
|
||
| ip li add BC type veth peer name CB | ||
| ip li set dev BC netns B | ||
| ip li set dev CB netns C | ||
|
|
||
| ip li add CD type veth peer name DC | ||
| ip li set dev CD netns C | ||
| ip li set dev DC netns D | ||
|
|
||
| ip li add CE type veth peer name EC | ||
| ip li set dev CE netns C | ||
| ip li set dev EC netns E | ||
|
|
||
| ip li add DF type veth peer name FD | ||
| ip li set dev DF netns D | ||
| ip li set dev FD netns Fd | ||
|
|
||
| ip li add EF type veth peer name FE | ||
| ip li set dev EF netns E | ||
| ip li set dev FE netns Fe | ||
| } | ||
|
|
||
| print_topology() | ||
| { | ||
| log "Network topology" | ||
|
|
||
| cat <<_EOF_ | ||
| [D] -- [Fd] | ||
| / | ||
| [A] -- [B] == [C] | ||
| \\ | ||
| [E] -- [Fe] | ||
| _EOF_ | ||
| } | ||
|
|
||
| conf_tso_off() | ||
| { | ||
| log "Setting TSO off to make PMTUD work NS-NS" | ||
|
|
||
| A ethtool -K AB tso off | ||
| B ethtool -K BA tso off | ||
| B ethtool -K BC tso off | ||
| C ethtool -K CB tso off | ||
| C ethtool -K CD tso off | ||
| C ethtool -K CE tso off | ||
| D ethtool -K DC tso off | ||
| D ethtool -K DF tso off | ||
| E ethtool -K EC tso off | ||
| E ethtool -K EF tso off | ||
| Fd ethtool -K FD tso off | ||
| Fe ethtool -K FE tso off | ||
| } | ||
|
|
||
| conf_link_mtu() | ||
| { | ||
| log "Configuring link MTU from B to C" | ||
|
|
||
| B ip li set dev BC mtu 1400 | ||
| C ip li set dev CB mtu 1400 | ||
| } | ||
|
|
||
| conf_forwarding_v4() | ||
| { | ||
| log "Configuring IPv4 forwarding" | ||
|
|
||
| B sysctl -q -w net.ipv4.conf.all.forwarding=1 | ||
| C sysctl -q -w net.ipv4.conf.all.forwarding=1 | ||
| D sysctl -q -w net.ipv4.conf.all.forwarding=1 | ||
| E sysctl -q -w net.ipv4.conf.all.forwarding=1 | ||
| } | ||
|
|
||
| conf_forwarding_v6() | ||
| { | ||
| log "Configuring IPv6 forwarding" | ||
|
|
||
| B sysctl -q -w net.ipv6.conf.all.forwarding=1 | ||
| C sysctl -q -w net.ipv6.conf.all.forwarding=1 | ||
| D sysctl -q -w net.ipv6.conf.all.forwarding=1 | ||
| E sysctl -q -w net.ipv6.conf.all.forwarding=1 | ||
| } | ||
|
|
||
| conf_addrs_v4() | ||
| { | ||
| log "Configuring IPv4 addresses" | ||
|
|
||
| A ip ad add dev AB $AB4/$PREFIX4 | ||
| B ip ad add dev BA $BA4/$PREFIX4 | ||
|
|
||
| B ip ad add dev BC $BC4/$PREFIX4 | ||
| C ip ad add dev CB $CB4/$PREFIX4 | ||
|
|
||
| C ip ad add dev CD $CD4/$PREFIX4 | ||
| D ip ad add dev DC $DC4/$PREFIX4 | ||
|
|
||
| C ip ad add dev CE $CE4/$PREFIX4 | ||
| E ip ad add dev EC $EC4/$PREFIX4 | ||
|
|
||
| D ip ad add dev DF $DF4/$PREFIX4 | ||
| Fd ip ad add dev FD $FD4/$PREFIX4 | ||
|
|
||
| E ip ad add dev EF $EF4/$PREFIX4 | ||
| Fe ip ad add dev FE $FE4/$PREFIX4 | ||
| } | ||
|
|
||
| conf_addrs_v6() | ||
| { | ||
| log "Configuring IPv6 addresses" | ||
|
|
||
| A ip ad add dev AB $AB6/$PREFIX6 nodad | ||
| B ip ad add dev BA $BA6/$PREFIX6 nodad | ||
|
|
||
| B ip ad add dev BC $BC6/$PREFIX6 nodad | ||
| C ip ad add dev CB $CB6/$PREFIX6 nodad | ||
|
|
||
| C ip ad add dev CD $CD6/$PREFIX6 nodad | ||
| D ip ad add dev DC $DC6/$PREFIX6 nodad | ||
|
|
||
| C ip ad add dev CE $CE6/$PREFIX6 nodad | ||
| E ip ad add dev EC $EC6/$PREFIX6 nodad | ||
|
|
||
| D ip ad add dev DF $DF6/$PREFIX6 nodad | ||
| Fd ip ad add dev FD $FD6/$PREFIX6 nodad | ||
|
|
||
| E ip ad add dev EF $EF6/$PREFIX6 nodad | ||
| Fe ip ad add dev FE $FE6/$PREFIX6 nodad | ||
| } | ||
|
|
||
| set_ifaces_up() | ||
| { | ||
| log "Bringing interfaces up" | ||
|
|
||
| A ip li set dev lo up | ||
| B ip li set dev lo up | ||
| C ip li set dev lo up | ||
| D ip li set dev lo up | ||
| E ip li set dev lo up | ||
| Fd ip li set dev lo up | ||
| Fe ip li set dev lo up | ||
|
|
||
| A ip li set dev AB up | ||
| B ip li set dev BA up | ||
|
|
||
| B ip li set dev BC up | ||
| C ip li set dev CB up | ||
|
|
||
| C ip li set dev CD up | ||
| D ip li set dev DC up | ||
|
|
||
| C ip li set dev CE up | ||
| E ip li set dev EC up | ||
|
|
||
| D ip li set dev DF up | ||
| Fd ip li set dev FD up | ||
|
|
||
| E ip li set dev EF up | ||
| Fe ip li set dev FE up | ||
| } | ||
|
|
||
| conf_routes_default_v4() | ||
| { | ||
| log "Configuring default IPv4 routes" | ||
|
|
||
| A ip ro add default via $BA4 | ||
| B ip ro add default via $CB4 | ||
| C ip ro add default via $BC4 | ||
| D ip ro add default via $CD4 | ||
| E ip ro add default via $CE4 | ||
| Fd ip ro add default via $DF4 | ||
| Fe ip ro add default via $EF4 | ||
| } | ||
|
|
||
| conf_routes_default_v6() | ||
| { | ||
| log "Configuring default IPv6 routes" | ||
|
|
||
| A ip ro add default via $BA6 | ||
| B ip ro add default via $CB6 | ||
| C ip ro add default via $BC6 | ||
| D ip ro add default via $CD6 | ||
| E ip ro add default via $CE6 | ||
| Fd ip ro add default via $DF6 | ||
| Fe ip ro add default via $EF6 | ||
| } | ||
|
|
||
| conf_routes_multipath_v4() | ||
| { | ||
| log "Configuring multipath IPv4 routes" | ||
|
|
||
| C ip ro add $FF4/32 \ | ||
| nexthop via $DC4 \ | ||
| nexthop via $EC4 | ||
| } | ||
|
|
||
| conf_routes_multipath_v6() | ||
| { | ||
| log "Configuring multipath IPv6 routes" | ||
|
|
||
| C ip ro add $FF6/128 \ | ||
| nexthop via $DC6 \ | ||
| nexthop via $EC6 | ||
| } | ||
|
|
||
| setup() | ||
| { | ||
| log "Starting setup" | ||
|
|
||
| create_namespaces | ||
| link_namespaces | ||
| print_topology | ||
| conf_tso_off | ||
| conf_link_mtu | ||
| conf_forwarding_v4 | ||
| conf_forwarding_v6 | ||
| conf_addrs_v4 | ||
| conf_addrs_v6 | ||
| set_ifaces_up | ||
| conf_routes_default_v4 | ||
| conf_routes_default_v6 | ||
| conf_routes_multipath_v4 | ||
| conf_routes_multipath_v6 | ||
| } | ||
|
|
||
| setup |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| #!/bin/bash | ||
|
|
||
| # set -x | ||
|
|
||
| basedir=$(dirname "$0") | ||
|
|
||
| . $basedir/vars.sh | ||
| . $basedir/funcs.sh | ||
|
|
||
|
|
||
| destroy_namespaces() | ||
| { | ||
| log "Destroying namespaces" | ||
|
|
||
| ip netns del A | ||
| ip netns del B | ||
| ip netns del C | ||
| ip netns del D | ||
| ip netns del E | ||
| ip netns del Fd | ||
| ip netns del Fe | ||
| } | ||
|
|
||
| debug_maybe() | ||
| { | ||
| log "Going into debug shell" | ||
|
|
||
| PS1='DEBUG \$ ' bash | ||
| } | ||
|
|
||
| report_test_result() | ||
| { | ||
| local exit_status=$1 | ||
|
|
||
| [[ $exit_status == 0 ]] && msg_ok "SUCCESS" || msg_err "FAIL" | ||
| } | ||
|
|
||
| teardown() | ||
| { | ||
| log "Starting teardown" | ||
| # debug_maybe | ||
| destroy_namespaces | ||
| report_test_result "$@" | ||
| } | ||
|
|
||
| teardown "$@" |
Oops, something went wrong.