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authorDavid Gibson <david@gibson.dropbear.id.au>2024-08-21 14:20:17 +1000
committerStefano Brivio <sbrivio@redhat.com>2024-08-21 12:00:35 +0200
commite813a4df7da28a69ef32642f42fd625aea798967 (patch)
tree081ec82de11eb4f99fc4675ed3ac238d23779f4c /test/passt_in_ns
parentdbaaebbe005321855eeb731ca1fce82e27d2bf47 (diff)
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conf: Allow address remapped to host to be configured
Because the host and guest share the same IP address with passt/pasta, it's not possible for the guest to directly address the host. Therefore we allow packets from the guest going to a special "NAT to host" address to be redirected to the host, appearing there as though they have both source and destination address of loopback. Currently that special address is always the address of the default gateway (or none). That can be a problem if we want that gateway to be addressable by the guest. Therefore, allow the special "NAT to host" address to be overridden on the command line with a new --map-host-loopback option. In order to exercise and test it, update the passt_in_ns and perf tests to use this option and give different mapping addresses for the two layers of the environment. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Diffstat (limited to 'test/passt_in_ns')
-rw-r--r--test/passt_in_ns/dhcp73
-rw-r--r--test/passt_in_ns/tcp38
-rw-r--r--test/passt_in_ns/udp22
3 files changed, 103 insertions, 30 deletions
diff --git a/test/passt_in_ns/dhcp b/test/passt_in_ns/dhcp
new file mode 100644
index 0000000..0ceed7c
--- /dev/null
+++ b/test/passt_in_ns/dhcp
@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# PASST - Plug A Simple Socket Transport
+# for qemu/UNIX domain socket mode
+#
+# PASTA - Pack A Subtle Tap Abstraction
+# for network namespace/tap device mode
+#
+# test/passt/dhcp - Check DHCP and DHCPv6 functionality in passt mode
+#
+# Copyright (c) 2021 Red Hat GmbH
+# Author: Stefano Brivio <sbrivio@redhat.com>
+
+gtools ip jq dhclient sed tr
+htools ip jq sed tr head
+
+set MAP_NS4 192.0.2.2
+set MAP_NS6 2001:db8:9a55::2
+
+test Interface name
+gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
+hout HOST_IFNAME ip -j -4 route show|jq -rM '[.[] | select(.dst == "default").dev] | .[0]'
+hout HOST_IFNAME6 ip -j -6 route show|jq -rM '[.[] | select(.dst == "default").dev] | .[0]'
+check [ -n "__IFNAME__" ]
+
+test DHCP: address
+guest /sbin/dhclient -4 __IFNAME__
+gout ADDR ip -j -4 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[0].local'
+hout HOST_ADDR ip -j -4 addr show|jq -rM '.[] | select(.ifname == "__HOST_IFNAME__").addr_info[0].local'
+check [ "__ADDR__" = "__HOST_ADDR__" ]
+
+test DHCP: route
+gout GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway'
+hout HOST_GW ip -j -4 route show|jq -rM '[.[] | select(.dst == "default").gateway] | .[0]'
+check [ "__GW__" = "__HOST_GW__" ]
+
+test DHCP: MTU
+gout MTU ip -j link show | jq -rM '.[] | select(.ifname == "__IFNAME__").mtu'
+check [ __MTU__ = 65520 ]
+
+test DHCP: DNS
+gout DNS sed -n 's/^nameserver \([0-9]*\.\)\(.*\)/\1\2/p' /etc/resolv.conf | tr '\n' ',' | sed 's/,$//;s/$/\n/'
+hout HOST_DNS sed -n 's/^nameserver \([0-9]*\.\)\(.*\)/\1\2/p' /etc/resolv.conf | head -n3 | tr '\n' ',' | sed 's/,$//;s/$/\n/'
+check [ "__DNS__" = "__HOST_DNS__" ] || ( [ "__DNS__" = "__MAP_NS4__" ] && expr "__HOST_DNS__" : "127[.]" )
+
+# FQDNs should be terminated by dots, but the guest DHCP client might omit them:
+# strip them first
+test DHCP: search list
+gout SEARCH sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
+hout HOST_SEARCH sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
+check [ "__SEARCH__" = "__HOST_SEARCH__" ]
+
+test DHCPv6: address
+guest /sbin/dhclient -6 __IFNAME__
+gout ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.prefixlen == 128).local] | .[0]'
+hout HOST_ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global" and .deprecated != true).local] | .[0]'
+check [ "__ADDR6__" = "__HOST_ADDR6__" ]
+
+test DHCPv6: route
+gout GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway'
+hout HOST_GW6 ip -j -6 route show|jq -rM '[.[] | select(.dst == "default").gateway] | .[0]'
+check [ "__GW6__" = "__HOST_GW6__" ]
+
+# Strip interface specifier: interface names might differ between host and guest
+test DHCPv6: DNS
+gout DNS6 sed -n 's/^nameserver \([^:]*:\)\([^%]*\).*/\1\2/p' /etc/resolv.conf | tr '\n' ',' | sed 's/,$//;s/$/\n/'
+hout HOST_DNS6 sed -n 's/^nameserver \([^:]*:\)\([^%]*\).*/\1\2/p' /etc/resolv.conf | tr '\n' ',' | sed 's/,$//;s/$/\n/'
+check [ "__DNS6__" = "__HOST_DNS6__" ] || [ "__DNS6__" = "__MAP_NS6__" -a "__HOST_DNS6__" = "::1" ]
+
+test DHCPv6: search list
+gout SEARCH6 sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
+hout HOST_SEARCH6 sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
+check [ "__SEARCH6__" = "__HOST_SEARCH6__" ]
diff --git a/test/passt_in_ns/tcp b/test/passt_in_ns/tcp
index cdb7060..aaf340e 100644
--- a/test/passt_in_ns/tcp
+++ b/test/passt_in_ns/tcp
@@ -15,6 +15,11 @@ gtools socat ip jq
htools socat ip jq
nstools socat ip jq
+set MAP_HOST4 192.0.2.1
+set MAP_HOST6 2001:db8:9a55::1
+set MAP_NS4 192.0.2.2
+set MAP_NS6 2001:db8:9a55::2
+
set TEMP_BIG __STATEDIR__/test_big.bin
set TEMP_SMALL __STATEDIR__/test_small.bin
set TEMP_NS_BIG __STATEDIR__/test_ns_big.bin
@@ -36,16 +41,15 @@ check cmp __TEMP_NS_BIG__ __BASEPATH__/big.bin
test TCP/IPv4: guest to host: big transfer
hostb socat -u TCP4-LISTEN:10003 OPEN:__TEMP_BIG__,create,trunc
-gout GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway'
sleep 1
-guest socat -u OPEN:/root/big.bin TCP4:__GW__:10003
+guest socat -u OPEN:/root/big.bin TCP4:__MAP_HOST4__:10003
hostw
check cmp __TEMP_BIG__ __BASEPATH__/big.bin
test TCP/IPv4: guest to ns: big transfer
nsb socat -u TCP4-LISTEN:10002 OPEN:__TEMP_NS_BIG__,create,trunc
sleep 1
-guest socat -u OPEN:/root/big.bin TCP4:__GW__:10002
+guest socat -u OPEN:/root/big.bin TCP4:__MAP_NS4__:10002
nsw
check cmp __TEMP_NS_BIG__ __BASEPATH__/big.bin
@@ -59,7 +63,7 @@ check cmp __TEMP_BIG__ __BASEPATH__/big.bin
test TCP/IPv4: ns to host (via tap): big transfer
hostb socat -u TCP4-LISTEN:10003 OPEN:__TEMP_BIG__,create,trunc
sleep 1
-ns socat -u OPEN:__BASEPATH__/big.bin TCP4:__GW__:10003
+ns socat -u OPEN:__BASEPATH__/big.bin TCP4:__MAP_HOST4__:10003
hostw
check cmp __TEMP_BIG__ __BASEPATH__/big.bin
@@ -95,16 +99,15 @@ check cmp __TEMP_NS_SMALL__ __BASEPATH__/small.bin
test TCP/IPv4: guest to host: small transfer
hostb socat -u TCP4-LISTEN:10003 OPEN:__TEMP_SMALL__,create,trunc
-gout GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway'
sleep 1
-guest socat -u OPEN:/root/small.bin TCP4:__GW__:10003
+guest socat -u OPEN:/root/small.bin TCP4:__MAP_HOST4__:10003
hostw
check cmp __TEMP_SMALL__ __BASEPATH__/small.bin
test TCP/IPv4: guest to ns: small transfer
nsb socat -u TCP4-LISTEN:10002 OPEN:__TEMP_NS_SMALL__,create,trunc
sleep 1
-guest socat -u OPEN:/root/small.bin TCP4:__GW__:10002
+guest socat -u OPEN:/root/small.bin TCP4:__MAP_NS4__:10002
nsw
check cmp __TEMP_NS_SMALL__ __BASEPATH__/small.bin
@@ -118,7 +121,7 @@ check cmp __TEMP_SMALL__ __BASEPATH__/small.bin
test TCP/IPv4: ns to host (via tap): small transfer
hostb socat -u TCP4-LISTEN:10003 OPEN:__TEMP_SMALL__,create,trunc
sleep 1
-ns socat -u OPEN:__BASEPATH__/small.bin TCP4:__GW__:10003
+ns socat -u OPEN:__BASEPATH__/small.bin TCP4:__MAP_HOST4__:10003
hostw
check cmp __TEMP_SMALL__ __BASEPATH__/small.bin
@@ -152,17 +155,15 @@ check cmp __TEMP_NS_BIG__ __BASEPATH__/big.bin
test TCP/IPv6: guest to host: big transfer
hostb socat -u TCP6-LISTEN:10003 OPEN:__TEMP_BIG__,create,trunc
-gout GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway'
-gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
sleep 1
-guest socat -u OPEN:/root/big.bin TCP6:[__GW6__%__IFNAME__]:10003
+guest socat -u OPEN:/root/big.bin TCP6:[__MAP_HOST6__]:10003
hostw
check cmp __TEMP_BIG__ __BASEPATH__/big.bin
test TCP/IPv6: guest to ns: big transfer
nsb socat -u TCP6-LISTEN:10002 OPEN:__TEMP_NS_BIG__,create,trunc
sleep 1
-guest socat -u OPEN:/root/big.bin TCP6:[__GW6__%__IFNAME__]:10002
+guest socat -u OPEN:/root/big.bin TCP6:[__MAP_NS6__]:10002
nsw
check cmp __TEMP_NS_BIG__ __BASEPATH__/big.bin
@@ -175,9 +176,8 @@ check cmp __TEMP_BIG__ __BASEPATH__/big.bin
test TCP/IPv6: ns to host (via tap): big transfer
hostb socat -u TCP6-LISTEN:10003 OPEN:__TEMP_BIG__,create,trunc
-nsout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
sleep 1
-ns socat -u OPEN:__BASEPATH__/big.bin TCP6:[__GW6__%__IFNAME__]:10003
+ns socat -u OPEN:__BASEPATH__/big.bin TCP6:[__MAP_HOST6__]:10003
hostw
check cmp __TEMP_BIG__ __BASEPATH__/big.bin
@@ -190,6 +190,7 @@ guest cmp test_big.bin /root/big.bin
test TCP/IPv6: ns to guest (using namespace address): big transfer
guestb socat -u TCP6-LISTEN:10001 OPEN:test_big.bin,create,trunc
+nsout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
nsout ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[0].local'
sleep 1
ns socat -u OPEN:__BASEPATH__/big.bin TCP6:[__ADDR6__]:10001
@@ -212,17 +213,15 @@ check cmp __TEMP_NS_SMALL__ __BASEPATH__/small.bin
test TCP/IPv6: guest to host: small transfer
hostb socat -u TCP6-LISTEN:10003 OPEN:__TEMP_SMALL__,create,trunc
-gout GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway'
-gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
sleep 1
-guest socat -u OPEN:/root/small.bin TCP6:[__GW6__%__IFNAME__]:10003
+guest socat -u OPEN:/root/small.bin TCP6:[__MAP_HOST6__]:10003
hostw
check cmp __TEMP_SMALL__ __BASEPATH__/small.bin
test TCP/IPv6: guest to ns: small transfer
nsb socat -u TCP6-LISTEN:10002 OPEN:__TEMP_NS_SMALL__
sleep 1
-guest socat -u OPEN:/root/small.bin TCP6:[__GW6__%__IFNAME__]:10002
+guest socat -u OPEN:/root/small.bin TCP6:[__MAP_NS6__]:10002
nsw
check cmp __TEMP_NS_SMALL__ __BASEPATH__/small.bin
@@ -235,9 +234,8 @@ check cmp __TEMP_SMALL__ __BASEPATH__/small.bin
test TCP/IPv6: ns to host (via tap): small transfer
hostb socat -u TCP6-LISTEN:10003 OPEN:__TEMP_SMALL__,create,trunc
-nsout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
sleep 1
-ns socat -u OPEN:__BASEPATH__/small.bin TCP6:[__GW6__%__IFNAME__]:10003
+ns socat -u OPEN:__BASEPATH__/small.bin TCP6:[__MAP_HOST6__]:10003
hostw
check cmp __TEMP_SMALL__ __BASEPATH__/small.bin
diff --git a/test/passt_in_ns/udp b/test/passt_in_ns/udp
index 8a02513..3426ab9 100644
--- a/test/passt_in_ns/udp
+++ b/test/passt_in_ns/udp
@@ -15,6 +15,11 @@ gtools socat ip jq
nstools socat ip jq
htools socat ip jq
+set MAP_HOST4 192.0.2.1
+set MAP_HOST6 2001:db8:9a55::1
+set MAP_NS4 192.0.2.2
+set MAP_NS6 2001:db8:9a55::2
+
set TEMP __STATEDIR__/test.bin
set TEMP_NS __STATEDIR__/test_ns.bin
@@ -34,16 +39,15 @@ check cmp __TEMP_NS__ __BASEPATH__/medium.bin
test UDP/IPv4: guest to host
hostb socat -u UDP4-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc
-gout GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway'
sleep 1
-guest socat -u OPEN:/root/medium.bin UDP4:__GW__:10003,shut-null
+guest socat -u OPEN:/root/medium.bin UDP4:__MAP_HOST4__:10003,shut-null
hostw
check cmp __TEMP__ __BASEPATH__/medium.bin
test UDP/IPv4: guest to ns
nsb socat -u UDP4-LISTEN:10002,null-eof OPEN:__TEMP_NS__,create,trunc
sleep 1
-guest socat -u OPEN:/root/medium.bin UDP4:__GW__:10002,shut-null
+guest socat -u OPEN:/root/medium.bin UDP4:__MAP_NS4__:10002,shut-null
nsw
check cmp __TEMP_NS__ __BASEPATH__/medium.bin
@@ -57,7 +61,7 @@ check cmp __TEMP__ __BASEPATH__/medium.bin
test UDP/IPv4: ns to host (via tap)
hostb socat -u UDP4-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc
sleep 1
-ns socat -u OPEN:__BASEPATH__/medium.bin UDP4:__GW__:10003,shut-null
+ns socat -u OPEN:__BASEPATH__/medium.bin UDP4:__MAP_HOST4__:10003,shut-null
hostw
check cmp __TEMP__ __BASEPATH__/medium.bin
@@ -93,17 +97,15 @@ check cmp __TEMP_NS__ __BASEPATH__/medium.bin
test UDP/IPv6: guest to host
hostb socat -u UDP6-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc
-gout GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway'
-gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
sleep 1
-guest socat -u OPEN:/root/medium.bin UDP6:[__GW6__%__IFNAME__]:10003,shut-null
+guest socat -u OPEN:/root/medium.bin UDP6:[__MAP_HOST6__]:10003,shut-null
hostw
check cmp __TEMP__ __BASEPATH__/medium.bin
test UDP/IPv6: guest to ns
nsb socat -u UDP6-LISTEN:10002,null-eof OPEN:__TEMP_NS__,create,trunc
sleep 1
-guest socat -u OPEN:/root/medium.bin UDP6:[__GW6__%__IFNAME__]:10002,shut-null
+guest socat -u OPEN:/root/medium.bin UDP6:[__MAP_NS6__]:10002,shut-null
nsw
check cmp __TEMP_NS__ __BASEPATH__/medium.bin
@@ -116,9 +118,8 @@ check cmp __TEMP__ __BASEPATH__/medium.bin
test UDP/IPv6: ns to host (via tap)
hostb socat -u UDP6-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc
-nsout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
sleep 1
-ns socat -u OPEN:__BASEPATH__/medium.bin UDP6:[__GW6__%__IFNAME__]:10003,shut-null
+ns socat -u OPEN:__BASEPATH__/medium.bin UDP6:[__MAP_HOST6__]:10003,shut-null
hostw
check cmp __TEMP__ __BASEPATH__/medium.bin
@@ -131,6 +132,7 @@ guest cmp test.bin /root/medium.bin
test UDP/IPv6: ns to guest (using namespace address)
guestb socat -u UDP6-LISTEN:10001,null-eof OPEN:test.bin,create,trunc
+nsout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
nsout ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[0].local'
sleep 1
ns socat -u OPEN:__BASEPATH__/medium.bin UDP6:[__ADDR6__]:10001,shut-null