diff options
Diffstat (limited to 'tools/testing/selftests/netfilter')
21 files changed, 3926 insertions, 175 deletions
diff --git a/tools/testing/selftests/netfilter/.gitignore b/tools/testing/selftests/netfilter/.gitignore new file mode 100644 index 000000000000..4cb887b57413 --- /dev/null +++ b/tools/testing/selftests/netfilter/.gitignore @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0-only +nf-queue +connect_close diff --git a/tools/testing/selftests/netfilter/Makefile b/tools/testing/selftests/netfilter/Makefile index 08194aa44006..4504ee07be08 100644 --- a/tools/testing/selftests/netfilter/Makefile +++ b/tools/testing/selftests/netfilter/Makefile @@ -1,8 +1,15 @@ # SPDX-License-Identifier: GPL-2.0 # Makefile for netfilter selftests -TEST_PROGS := nft_trans_stress.sh nft_nat.sh bridge_brouter.sh \ +TEST_PROGS := nft_trans_stress.sh nft_fib.sh nft_nat.sh bridge_brouter.sh \ conntrack_icmp_related.sh nft_flowtable.sh ipvs.sh \ - nft_concat_range.sh + nft_concat_range.sh nft_conntrack_helper.sh \ + nft_queue.sh nft_meta.sh nf_nat_edemux.sh \ + ipip-conntrack-mtu.sh conntrack_tcp_unreplied.sh \ + conntrack_vrf.sh nft_synproxy.sh rpath.sh + +CFLAGS += $(shell pkg-config --cflags libmnl 2>/dev/null || echo "-I/usr/include/libmnl") +LDLIBS = -lmnl +TEST_GEN_FILES = nf-queue connect_close include ../lib.mk diff --git a/tools/testing/selftests/netfilter/config b/tools/testing/selftests/netfilter/config index 59caa8f71cd8..4faf2ce021d9 100644 --- a/tools/testing/selftests/netfilter/config +++ b/tools/testing/selftests/netfilter/config @@ -1,2 +1,8 @@ CONFIG_NET_NS=y CONFIG_NF_TABLES_INET=y +CONFIG_NFT_QUEUE=m +CONFIG_NFT_NAT=m +CONFIG_NFT_REDIR=m +CONFIG_NFT_MASQ=m +CONFIG_NFT_FLOW_OFFLOAD=m +CONFIG_NF_CT_NETLINK=m diff --git a/tools/testing/selftests/netfilter/connect_close.c b/tools/testing/selftests/netfilter/connect_close.c new file mode 100644 index 000000000000..1c3b0add54c4 --- /dev/null +++ b/tools/testing/selftests/netfilter/connect_close.c @@ -0,0 +1,136 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <stdio.h> +#include <stdlib.h> +#include <fcntl.h> +#include <string.h> +#include <unistd.h> +#include <signal.h> + +#include <arpa/inet.h> +#include <sys/socket.h> + +#define PORT 12345 +#define RUNTIME 10 + +static struct { + unsigned int timeout; + unsigned int port; +} opts = { + .timeout = RUNTIME, + .port = PORT, +}; + +static void handler(int sig) +{ + _exit(sig == SIGALRM ? 0 : 1); +} + +static void set_timeout(void) +{ + struct sigaction action = { + .sa_handler = handler, + }; + + sigaction(SIGALRM, &action, NULL); + + alarm(opts.timeout); +} + +static void do_connect(const struct sockaddr_in *dst) +{ + int s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); + + if (s >= 0) + fcntl(s, F_SETFL, O_NONBLOCK); + + connect(s, (struct sockaddr *)dst, sizeof(*dst)); + close(s); +} + +static void do_accept(const struct sockaddr_in *src) +{ + int c, one = 1, s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); + + if (s < 0) + return; + + setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)); + setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one)); + + bind(s, (struct sockaddr *)src, sizeof(*src)); + + listen(s, 16); + + c = accept(s, NULL, NULL); + if (c >= 0) + close(c); + + close(s); +} + +static int accept_loop(void) +{ + struct sockaddr_in src = { + .sin_family = AF_INET, + .sin_port = htons(opts.port), + }; + + inet_pton(AF_INET, "127.0.0.1", &src.sin_addr); + + set_timeout(); + + for (;;) + do_accept(&src); + + return 1; +} + +static int connect_loop(void) +{ + struct sockaddr_in dst = { + .sin_family = AF_INET, + .sin_port = htons(opts.port), + }; + + inet_pton(AF_INET, "127.0.0.1", &dst.sin_addr); + + set_timeout(); + + for (;;) + do_connect(&dst); + + return 1; +} + +static void parse_opts(int argc, char **argv) +{ + int c; + + while ((c = getopt(argc, argv, "t:p:")) != -1) { + switch (c) { + case 't': + opts.timeout = atoi(optarg); + break; + case 'p': + opts.port = atoi(optarg); + break; + } + } +} + +int main(int argc, char *argv[]) +{ + pid_t p; + + parse_opts(argc, argv); + + p = fork(); + if (p < 0) + return 111; + + if (p > 0) + return accept_loop(); + + return connect_loop(); +} diff --git a/tools/testing/selftests/netfilter/conntrack_tcp_unreplied.sh b/tools/testing/selftests/netfilter/conntrack_tcp_unreplied.sh new file mode 100755 index 000000000000..e7d7bf13cff5 --- /dev/null +++ b/tools/testing/selftests/netfilter/conntrack_tcp_unreplied.sh @@ -0,0 +1,167 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Check that UNREPLIED tcp conntrack will eventually timeout. +# + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +ret=0 + +waittime=20 +sfx=$(mktemp -u "XXXXXXXX") +ns1="ns1-$sfx" +ns2="ns2-$sfx" + +nft --version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without nft tool" + exit $ksft_skip +fi + +ip -Version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +cleanup() { + ip netns pids $ns1 | xargs kill 2>/dev/null + ip netns pids $ns2 | xargs kill 2>/dev/null + + ip netns del $ns1 + ip netns del $ns2 +} + +ipv4() { + echo -n 192.168.$1.2 +} + +check_counter() +{ + ns=$1 + name=$2 + expect=$3 + local lret=0 + + cnt=$(ip netns exec $ns2 nft list counter inet filter "$name" | grep -q "$expect") + if [ $? -ne 0 ]; then + echo "ERROR: counter $name in $ns2 has unexpected value (expected $expect)" 1>&2 + ip netns exec $ns2 nft list counter inet filter "$name" 1>&2 + lret=1 + fi + + return $lret +} + +# Create test namespaces +ip netns add $ns1 || exit 1 + +trap cleanup EXIT + +ip netns add $ns2 || exit 1 + +# Connect the namespace to the host using a veth pair +ip -net $ns1 link add name veth1 type veth peer name veth2 +ip -net $ns1 link set netns $ns2 dev veth2 + +ip -net $ns1 link set up dev lo +ip -net $ns2 link set up dev lo +ip -net $ns1 link set up dev veth1 +ip -net $ns2 link set up dev veth2 + +ip -net $ns2 addr add 10.11.11.2/24 dev veth2 +ip -net $ns2 route add default via 10.11.11.1 + +ip netns exec $ns2 sysctl -q net.ipv4.conf.veth2.forwarding=1 + +# add a rule inside NS so we enable conntrack +ip netns exec $ns1 iptables -A INPUT -m state --state established,related -j ACCEPT + +ip -net $ns1 addr add 10.11.11.1/24 dev veth1 +ip -net $ns1 route add 10.99.99.99 via 10.11.11.2 + +# Check connectivity works +ip netns exec $ns1 ping -q -c 2 10.11.11.2 >/dev/null || exit 1 + +ip netns exec $ns2 nc -l -p 8080 < /dev/null & + +# however, conntrack entries are there + +ip netns exec $ns2 nft -f - <<EOF +table inet filter { + counter connreq { } + counter redir { } + chain input { + type filter hook input priority 0; policy accept; + ct state new tcp flags syn ip daddr 10.99.99.99 tcp dport 80 counter name "connreq" accept + ct state new ct status dnat tcp dport 8080 counter name "redir" accept + } +} +EOF +if [ $? -ne 0 ]; then + echo "ERROR: Could not load nft rules" + exit 1 +fi + +ip netns exec $ns2 sysctl -q net.netfilter.nf_conntrack_tcp_timeout_syn_sent=10 + +echo "INFO: connect $ns1 -> $ns2 to the virtual ip" +ip netns exec $ns1 bash -c 'while true ; do + nc -p 60000 10.99.99.99 80 + sleep 1 + done' & + +sleep 1 + +ip netns exec $ns2 nft -f - <<EOF +table inet nat { + chain prerouting { + type nat hook prerouting priority 0; policy accept; + ip daddr 10.99.99.99 tcp dport 80 redirect to :8080 + } +} +EOF +if [ $? -ne 0 ]; then + echo "ERROR: Could not load nat redirect" + exit 1 +fi + +count=$(ip netns exec $ns2 conntrack -L -p tcp --dport 80 2>/dev/null | wc -l) +if [ $count -eq 0 ]; then + echo "ERROR: $ns2 did not pick up tcp connection from peer" + exit 1 +fi + +echo "INFO: NAT redirect added in ns $ns2, waiting for $waittime seconds for nat to take effect" +for i in $(seq 1 $waittime); do + echo -n "." + + sleep 1 + + count=$(ip netns exec $ns2 conntrack -L -p tcp --reply-port-src 8080 2>/dev/null | wc -l) + if [ $count -gt 0 ]; then + echo + echo "PASS: redirection took effect after $i seconds" + break + fi + + m=$((i%20)) + if [ $m -eq 0 ]; then + echo " waited for $i seconds" + fi +done + +expect="packets 1 bytes 60" +check_counter "$ns2" "redir" "$expect" +if [ $? -ne 0 ]; then + ret=1 +fi + +if [ $ret -eq 0 ];then + echo "PASS: redirection counter has expected values" +else + echo "ERROR: no tcp connection was redirected" +fi + +exit $ret diff --git a/tools/testing/selftests/netfilter/conntrack_vrf.sh b/tools/testing/selftests/netfilter/conntrack_vrf.sh new file mode 100755 index 000000000000..8b5ea9234588 --- /dev/null +++ b/tools/testing/selftests/netfilter/conntrack_vrf.sh @@ -0,0 +1,241 @@ +#!/bin/sh + +# This script demonstrates interaction of conntrack and vrf. +# The vrf driver calls the netfilter hooks again, with oif/iif +# pointing at the VRF device. +# +# For ingress, this means first iteration has iifname of lower/real +# device. In this script, thats veth0. +# Second iteration is iifname set to vrf device, tvrf in this script. +# +# For egress, this is reversed: first iteration has the vrf device, +# second iteration is done with the lower/real/veth0 device. +# +# test_ct_zone_in demonstrates unexpected change of nftables +# behavior # caused by commit 09e856d54bda5f28 "vrf: Reset skb conntrack +# connection on VRF rcv" +# +# It was possible to assign conntrack zone to a packet (or mark it for +# `notracking`) in the prerouting chain before conntrack, based on real iif. +# +# After the change, the zone assignment is lost and the zone is assigned based +# on the VRF master interface (in case such a rule exists). +# assignment is lost. Instead, assignment based on the `iif` matching +# Thus it is impossible to distinguish packets based on the original +# interface. +# +# test_masquerade_vrf and test_masquerade_veth0 demonstrate the problem +# that was supposed to be fixed by the commit mentioned above to make sure +# that any fix to test case 1 won't break masquerade again. + +ksft_skip=4 + +IP0=172.30.30.1 +IP1=172.30.30.2 +PFXL=30 +ret=0 + +sfx=$(mktemp -u "XXXXXXXX") +ns0="ns0-$sfx" +ns1="ns1-$sfx" + +cleanup() +{ + ip netns pids $ns0 | xargs kill 2>/dev/null + ip netns pids $ns1 | xargs kill 2>/dev/null + + ip netns del $ns0 $ns1 +} + +nft --version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without nft tool" + exit $ksft_skip +fi + +ip -Version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +ip netns add "$ns0" +if [ $? -ne 0 ];then + echo "SKIP: Could not create net namespace $ns0" + exit $ksft_skip +fi +ip netns add "$ns1" + +trap cleanup EXIT + +ip netns exec $ns0 sysctl -q -w net.ipv4.conf.default.rp_filter=0 +ip netns exec $ns0 sysctl -q -w net.ipv4.conf.all.rp_filter=0 +ip netns exec $ns0 sysctl -q -w net.ipv4.conf.all.rp_filter=0 + +ip link add veth0 netns "$ns0" type veth peer name veth0 netns "$ns1" > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not add veth device" + exit $ksft_skip +fi + +ip -net $ns0 li add tvrf type vrf table 9876 +if [ $? -ne 0 ];then + echo "SKIP: Could not add vrf device" + exit $ksft_skip +fi + +ip -net $ns0 li set lo up + +ip -net $ns0 li set veth0 master tvrf +ip -net $ns0 li set tvrf up +ip -net $ns0 li set veth0 up +ip -net $ns1 li set veth0 up + +ip -net $ns0 addr add $IP0/$PFXL dev veth0 +ip -net $ns1 addr add $IP1/$PFXL dev veth0 + +ip netns exec $ns1 iperf3 -s > /dev/null 2>&1& +if [ $? -ne 0 ];then + echo "SKIP: Could not start iperf3" + exit $ksft_skip +fi + +# test vrf ingress handling. +# The incoming connection should be placed in conntrack zone 1, +# as decided by the first iteration of the ruleset. +test_ct_zone_in() +{ +ip netns exec $ns0 nft -f - <<EOF +table testct { + chain rawpre { + type filter hook prerouting priority raw; + + iif { veth0, tvrf } counter meta nftrace set 1 + iif veth0 counter ct zone set 1 counter return + iif tvrf counter ct zone set 2 counter return + ip protocol icmp counter + notrack counter + } + + chain rawout { + type filter hook output priority raw; + + oif veth0 counter ct zone set 1 counter return + oif tvrf counter ct zone set 2 counter return + notrack counter + } +} +EOF + ip netns exec $ns1 ping -W 1 -c 1 -I veth0 $IP0 > /dev/null + + # should be in zone 1, not zone 2 + count=$(ip netns exec $ns0 conntrack -L -s $IP1 -d $IP0 -p icmp --zone 1 2>/dev/null | wc -l) + if [ $count -eq 1 ]; then + echo "PASS: entry found in conntrack zone 1" + else + echo "FAIL: entry not found in conntrack zone 1" + count=$(ip netns exec $ns0 conntrack -L -s $IP1 -d $IP0 -p icmp --zone 2 2> /dev/null | wc -l) + if [ $count -eq 1 ]; then + echo "FAIL: entry found in zone 2 instead" + else + echo "FAIL: entry not in zone 1 or 2, dumping table" + ip netns exec $ns0 conntrack -L + ip netns exec $ns0 nft list ruleset + fi + fi +} + +# add masq rule that gets evaluated w. outif set to vrf device. +# This tests the first iteration of the packet through conntrack, +# oifname is the vrf device. +test_masquerade_vrf() +{ + local qdisc=$1 + + if [ "$qdisc" != "default" ]; then + tc -net $ns0 qdisc add dev tvrf root $qdisc + fi + + ip netns exec $ns0 conntrack -F 2>/dev/null + +ip netns exec $ns0 nft -f - <<EOF +flush ruleset +table ip nat { + chain rawout { + type filter hook output priority raw; + + oif tvrf ct state untracked counter + } + chain postrouting2 { + type filter hook postrouting priority mangle; + + oif tvrf ct state untracked counter + } + chain postrouting { + type nat hook postrouting priority 0; + # NB: masquerade should always be combined with 'oif(name) bla', + # lack of this is intentional here, we want to exercise double-snat. + ip saddr 172.30.30.0/30 counter masquerade random + } +} +EOF + ip netns exec $ns0 ip vrf exec tvrf iperf3 -t 1 -c $IP1 >/dev/null + if [ $? -ne 0 ]; then + echo "FAIL: iperf3 connect failure with masquerade + sport rewrite on vrf device" + ret=1 + return + fi + + # must also check that nat table was evaluated on second (lower device) iteration. + ip netns exec $ns0 nft list table ip nat |grep -q 'counter packets 2' && + ip netns exec $ns0 nft list table ip nat |grep -q 'untracked counter packets [1-9]' + if [ $? -eq 0 ]; then + echo "PASS: iperf3 connect with masquerade + sport rewrite on vrf device ($qdisc qdisc)" + else + echo "FAIL: vrf rules have unexpected counter value" + ret=1 + fi + + if [ "$qdisc" != "default" ]; then + tc -net $ns0 qdisc del dev tvrf root + fi +} + +# add masq rule that gets evaluated w. outif set to veth device. +# This tests the 2nd iteration of the packet through conntrack, +# oifname is the lower device (veth0 in this case). +test_masquerade_veth() +{ + ip netns exec $ns0 conntrack -F 2>/dev/null +ip netns exec $ns0 nft -f - <<EOF +flush ruleset +table ip nat { + chain postrouting { + type nat hook postrouting priority 0; + meta oif veth0 ip saddr 172.30.30.0/30 counter masquerade random + } +} +EOF + ip netns exec $ns0 ip vrf exec tvrf iperf3 -t 1 -c $IP1 > /dev/null + if [ $? -ne 0 ]; then + echo "FAIL: iperf3 connect failure with masquerade + sport rewrite on veth device" + ret=1 + return + fi + + # must also check that nat table was evaluated on second (lower device) iteration. + ip netns exec $ns0 nft list table ip nat |grep -q 'counter packets 2' + if [ $? -eq 0 ]; then + echo "PASS: iperf3 connect with masquerade + sport rewrite on veth device" + else + echo "FAIL: vrf masq rule has unexpected counter value" + ret=1 + fi +} + +test_ct_zone_in +test_masquerade_vrf "default" +test_masquerade_vrf "pfifo" +test_masquerade_veth + +exit $ret diff --git a/tools/testing/selftests/netfilter/ipip-conntrack-mtu.sh b/tools/testing/selftests/netfilter/ipip-conntrack-mtu.sh new file mode 100755 index 000000000000..eb9553e4986b --- /dev/null +++ b/tools/testing/selftests/netfilter/ipip-conntrack-mtu.sh @@ -0,0 +1,207 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +# Conntrack needs to reassemble fragments in order to have complete +# packets for rule matching. Reassembly can lead to packet loss. + +# Consider the following setup: +# +--------+ +---------+ +--------+ +# |Router A|-------|Wanrouter|-------|Router B| +# | |.IPIP..| |..IPIP.| | +# +--------+ +---------+ +--------+ +# / mtu 1400 \ +# / \ +#+--------+ +--------+ +#|Client A| |Client B| +#| | | | +#+--------+ +--------+ + +# Router A and Router B use IPIP tunnel interfaces to tunnel traffic +# between Client A and Client B over WAN. Wanrouter has MTU 1400 set +# on its interfaces. + +rnd=$(mktemp -u XXXXXXXX) +rx=$(mktemp) + +r_a="ns-ra-$rnd" +r_b="ns-rb-$rnd" +r_w="ns-rw-$rnd" +c_a="ns-ca-$rnd" +c_b="ns-cb-$rnd" + +checktool (){ + if ! $1 > /dev/null 2>&1; then + echo "SKIP: Could not $2" + exit $ksft_skip + fi +} + +checktool "iptables --version" "run test without iptables" +checktool "ip -Version" "run test without ip tool" +checktool "which socat" "run test without socat" +checktool "ip netns add ${r_a}" "create net namespace" + +for n in ${r_b} ${r_w} ${c_a} ${c_b};do + ip netns add ${n} +done + +cleanup() { + for n in ${r_a} ${r_b} ${r_w} ${c_a} ${c_b};do + ip netns del ${n} + done + rm -f ${rx} +} + +trap cleanup EXIT + +test_path() { + msg="$1" + + ip netns exec ${c_b} socat -t 3 - udp4-listen:5000,reuseaddr > ${rx} < /dev/null & + + sleep 1 + for i in 1 2 3; do + head -c1400 /dev/zero | tr "\000" "a" | \ + ip netns exec ${c_a} socat -t 1 -u STDIN UDP:192.168.20.2:5000 + done + + wait + + bytes=$(wc -c < ${rx}) + + if [ $bytes -eq 1400 ];then + echo "OK: PMTU $msg connection tracking" + else + echo "FAIL: PMTU $msg connection tracking: got $bytes, expected 1400" + exit 1 + fi +} + +# Detailed setup for Router A +# --------------------------- +# Interfaces: +# eth0: 10.2.2.1/24 +# eth1: 192.168.10.1/24 +# ipip0: No IP address, local 10.2.2.1 remote 10.4.4.1 +# Routes: +# 192.168.20.0/24 dev ipip0 (192.168.20.0/24 is subnet of Client B) +# 10.4.4.1 via 10.2.2.254 (Router B via Wanrouter) +# No iptables rules at all. + +ip link add veth0 netns ${r_a} type veth peer name veth0 netns ${r_w} +ip link add veth1 netns ${r_a} type veth peer name veth0 netns ${c_a} + +l_addr="10.2.2.1" +r_addr="10.4.4.1" +ip netns exec ${r_a} ip link add ipip0 type ipip local ${l_addr} remote ${r_addr} mode ipip || exit $ksft_skip + +for dev in lo veth0 veth1 ipip0; do + ip -net ${r_a} link set $dev up +done + +ip -net ${r_a} addr add 10.2.2.1/24 dev veth0 +ip -net ${r_a} addr add 192.168.10.1/24 dev veth1 + +ip -net ${r_a} route add 192.168.20.0/24 dev ipip0 +ip -net ${r_a} route add 10.4.4.0/24 via 10.2.2.254 + +ip netns exec ${r_a} sysctl -q net.ipv4.conf.all.forwarding=1 > /dev/null + +# Detailed setup for Router B +# --------------------------- +# Interfaces: +# eth0: 10.4.4.1/24 +# eth1: 192.168.20.1/24 +# ipip0: No IP address, local 10.4.4.1 remote 10.2.2.1 +# Routes: +# 192.168.10.0/24 dev ipip0 (192.168.10.0/24 is subnet of Client A) +# 10.2.2.1 via 10.4.4.254 (Router A via Wanrouter) +# No iptables rules at all. + +ip link add veth0 netns ${r_b} type veth peer name veth1 netns ${r_w} +ip link add veth1 netns ${r_b} type veth peer name veth0 netns ${c_b} + +l_addr="10.4.4.1" +r_addr="10.2.2.1" + +ip netns exec ${r_b} ip link add ipip0 type ipip local ${l_addr} remote ${r_addr} mode ipip || exit $ksft_skip + +for dev in lo veth0 veth1 ipip0; do + ip -net ${r_b} link set $dev up +done + +ip -net ${r_b} addr add 10.4.4.1/24 dev veth0 +ip -net ${r_b} addr add 192.168.20.1/24 dev veth1 + +ip -net ${r_b} route add 192.168.10.0/24 dev ipip0 +ip -net ${r_b} route add 10.2.2.0/24 via 10.4.4.254 +ip netns exec ${r_b} sysctl -q net.ipv4.conf.all.forwarding=1 > /dev/null + +# Client A +ip -net ${c_a} addr add 192.168.10.2/24 dev veth0 +ip -net ${c_a} link set dev lo up +ip -net ${c_a} link set dev veth0 up +ip -net ${c_a} route add default via 192.168.10.1 + +# Client A +ip -net ${c_b} addr add 192.168.20.2/24 dev veth0 +ip -net ${c_b} link set dev veth0 up +ip -net ${c_b} link set dev lo up +ip -net ${c_b} route add default via 192.168.20.1 + +# Wan +ip -net ${r_w} addr add 10.2.2.254/24 dev veth0 +ip -net ${r_w} addr add 10.4.4.254/24 dev veth1 + +ip -net ${r_w} link set dev lo up +ip -net ${r_w} link set dev veth0 up mtu 1400 +ip -net ${r_w} link set dev veth1 up mtu 1400 + +ip -net ${r_a} link set dev veth0 mtu 1400 +ip -net ${r_b} link set dev veth0 mtu 1400 + +ip netns exec ${r_w} sysctl -q net.ipv4.conf.all.forwarding=1 > /dev/null + +# Path MTU discovery +# ------------------ +# Running tracepath from Client A to Client B shows PMTU discovery is working +# as expected: +# +# clienta:~# tracepath 192.168.20.2 +# 1?: [LOCALHOST] pmtu 1500 +# 1: 192.168.10.1 0.867ms +# 1: 192.168.10.1 0.302ms +# 2: 192.168.10.1 0.312ms pmtu 1480 +# 2: no reply +# 3: 192.168.10.1 0.510ms pmtu 1380 +# 3: 192.168.20.2 2.320ms reached +# Resume: pmtu 1380 hops 3 back 3 + +# ip netns exec ${c_a} traceroute --mtu 192.168.20.2 + +# Router A has learned PMTU (1400) to Router B from Wanrouter. +# Client A has learned PMTU (1400 - IPIP overhead = 1380) to Client B +# from Router A. + +#Send large UDP packet +#--------------------- +#Now we send a 1400 bytes UDP packet from Client A to Client B: + +# clienta:~# head -c1400 /dev/zero | tr "\000" "a" | socat -u STDIN UDP:192.168.20.2:5000 +test_path "without" + +# The IPv4 stack on Client A already knows the PMTU to Client B, so the +# UDP packet is sent as two fragments (1380 + 20). Router A forwards the +# fragments between eth1 and ipip0. The fragments fit into the tunnel and +# reach their destination. + +#When sending the large UDP packet again, Router A now reassembles the +#fragments before routing the packet over ipip0. The resulting IPIP +#packet is too big (1400) for the tunnel PMTU (1380) to Router B, it is +#dropped on Router A before sending. + +ip netns exec ${r_a} iptables -A FORWARD -m conntrack --ctstate NEW +test_path "with" diff --git a/tools/testing/selftests/netfilter/nf-queue.c b/tools/testing/selftests/netfilter/nf-queue.c new file mode 100644 index 000000000000..9e56b9d47037 --- /dev/null +++ b/tools/testing/selftests/netfilter/nf-queue.c @@ -0,0 +1,395 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <errno.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdint.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <time.h> +#include <arpa/inet.h> + +#include <libmnl/libmnl.h> +#include <linux/netfilter.h> +#include <linux/netfilter/nfnetlink.h> +#include <linux/netfilter/nfnetlink_queue.h> + +struct options { + bool count_packets; + bool gso_enabled; + int verbose; + unsigned int queue_num; + unsigned int timeout; + uint32_t verdict; + uint32_t delay_ms; +}; + +static unsigned int queue_stats[5]; +static struct options opts; + +static void help(const char *p) +{ + printf("Usage: %s [-c|-v [-vv] ] [-t timeout] [-q queue_num] [-Qdst_queue ] [ -d ms_delay ] [-G]\n", p); +} + +static int parse_attr_cb(const struct nlattr *attr, void *data) +{ + const struct nlattr **tb = data; + int type = mnl_attr_get_type(attr); + + /* skip unsupported attribute in user-space */ + if (mnl_attr_type_valid(attr, NFQA_MAX) < 0) + return MNL_CB_OK; + + switch (type) { + case NFQA_MARK: + case NFQA_IFINDEX_INDEV: + case NFQA_IFINDEX_OUTDEV: + case NFQA_IFINDEX_PHYSINDEV: + case NFQA_IFINDEX_PHYSOUTDEV: + if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) { + perror("mnl_attr_validate"); + return MNL_CB_ERROR; + } + break; + case NFQA_TIMESTAMP: + if (mnl_attr_validate2(attr, MNL_TYPE_UNSPEC, + sizeof(struct nfqnl_msg_packet_timestamp)) < 0) { + perror("mnl_attr_validate2"); + return MNL_CB_ERROR; + } + break; + case NFQA_HWADDR: + if (mnl_attr_validate2(attr, MNL_TYPE_UNSPEC, + sizeof(struct nfqnl_msg_packet_hw)) < 0) { + perror("mnl_attr_validate2"); + return MNL_CB_ERROR; + } + break; + case NFQA_PAYLOAD: + break; + } + tb[type] = attr; + return MNL_CB_OK; +} + +static int queue_cb(const struct nlmsghdr *nlh, void *data) +{ + struct nlattr *tb[NFQA_MAX+1] = { 0 }; + struct nfqnl_msg_packet_hdr *ph = NULL; + uint32_t id = 0; + + (void)data; + + mnl_attr_parse(nlh, sizeof(struct nfgenmsg), parse_attr_cb, tb); + if (tb[NFQA_PACKET_HDR]) { + ph = mnl_attr_get_payload(tb[NFQA_PACKET_HDR]); + id = ntohl(ph->packet_id); + + if (opts.verbose > 0) + printf("packet hook=%u, hwproto 0x%x", + ntohs(ph->hw_protocol), ph->hook); + + if (ph->hook >= 5) { + fprintf(stderr, "Unknown hook %d\n", ph->hook); + return MNL_CB_ERROR; + } + + if (opts.verbose > 0) { + uint32_t skbinfo = 0; + + if (tb[NFQA_SKB_INFO]) + skbinfo = ntohl(mnl_attr_get_u32(tb[NFQA_SKB_INFO])); + if (skbinfo & NFQA_SKB_CSUMNOTREADY) + printf(" csumnotready"); + if (skbinfo & NFQA_SKB_GSO) + printf(" gso"); + if (skbinfo & NFQA_SKB_CSUM_NOTVERIFIED) + printf(" csumnotverified"); + puts(""); + } + + if (opts.count_packets) + queue_stats[ph->hook]++; + } + + return MNL_CB_OK + id; +} + +static struct nlmsghdr * +nfq_build_cfg_request(char *buf, uint8_t command, int queue_num) +{ + struct nlmsghdr *nlh = mnl_nlmsg_put_header(buf); + struct nfqnl_msg_config_cmd cmd = { + .command = command, + .pf = htons(AF_INET), + }; + struct nfgenmsg *nfg; + + nlh->nlmsg_type = (NFNL_SUBSYS_QUEUE << 8) | NFQNL_MSG_CONFIG; + nlh->nlmsg_flags = NLM_F_REQUEST; + + nfg = mnl_nlmsg_put_extra_header(nlh, sizeof(*nfg)); + + nfg->nfgen_family = AF_UNSPEC; + nfg->version = NFNETLINK_V0; + nfg->res_id = htons(queue_num); + + mnl_attr_put(nlh, NFQA_CFG_CMD, sizeof(cmd), &cmd); + + return nlh; +} + +static struct nlmsghdr * +nfq_build_cfg_params(char *buf, uint8_t mode, int range, int queue_num) +{ + struct nlmsghdr *nlh = mnl_nlmsg_put_header(buf); + struct nfqnl_msg_config_params params = { + .copy_range = htonl(range), + .copy_mode = mode, + }; + struct nfgenmsg *nfg; + + nlh->nlmsg_type = (NFNL_SUBSYS_QUEUE << 8) | NFQNL_MSG_CONFIG; + nlh->nlmsg_flags = NLM_F_REQUEST; + + nfg = mnl_nlmsg_put_extra_header(nlh, sizeof(*nfg)); + nfg->nfgen_family = AF_UNSPEC; + nfg->version = NFNETLINK_V0; + nfg->res_id = htons(queue_num); + + mnl_attr_put(nlh, NFQA_CFG_PARAMS, sizeof(params), ¶ms); + + return nlh; +} + +static struct nlmsghdr * +nfq_build_verdict(char *buf, int id, int queue_num, uint32_t verd) +{ + struct nfqnl_msg_verdict_hdr vh = { + .verdict = htonl(verd), + .id = htonl(id), + }; + struct nlmsghdr *nlh; + struct nfgenmsg *nfg; + + nlh = mnl_nlmsg_put_header(buf); + nlh->nlmsg_type = (NFNL_SUBSYS_QUEUE << 8) | NFQNL_MSG_VERDICT; + nlh->nlmsg_flags = NLM_F_REQUEST; + nfg = mnl_nlmsg_put_extra_header(nlh, sizeof(*nfg)); + nfg->nfgen_family = AF_UNSPEC; + nfg->version = NFNETLINK_V0; + nfg->res_id = htons(queue_num); + + mnl_attr_put(nlh, NFQA_VERDICT_HDR, sizeof(vh), &vh); + + return nlh; +} + +static void print_stats(void) +{ + unsigned int last, total; + int i; + + total = 0; + last = queue_stats[0]; + + for (i = 0; i < 5; i++) { + printf("hook %d packets %08u\n", i, queue_stats[i]); + last = queue_stats[i]; + total += last; + } + + printf("%u packets total\n", total); +} + +struct mnl_socket *open_queue(void) +{ + char buf[MNL_SOCKET_BUFFER_SIZE]; + unsigned int queue_num; + struct mnl_socket *nl; + struct nlmsghdr *nlh; + struct timeval tv; + uint32_t flags; + + nl = mnl_socket_open(NETLINK_NETFILTER); + if (nl == NULL) { + perror("mnl_socket_open"); + exit(EXIT_FAILURE); + } + + if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) { + perror("mnl_socket_bind"); + exit(EXIT_FAILURE); + } + + queue_num = opts.queue_num; + nlh = nfq_build_cfg_request(buf, NFQNL_CFG_CMD_BIND, queue_num); + + if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) { + perror("mnl_socket_sendto"); + exit(EXIT_FAILURE); + } + + nlh = nfq_build_cfg_params(buf, NFQNL_COPY_PACKET, 0xFFFF, queue_num); + + flags = opts.gso_enabled ? NFQA_CFG_F_GSO : 0; + flags |= NFQA_CFG_F_UID_GID; + mnl_attr_put_u32(nlh, NFQA_CFG_FLAGS, htonl(flags)); + mnl_attr_put_u32(nlh, NFQA_CFG_MASK, htonl(flags)); + + if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) { + perror("mnl_socket_sendto"); + exit(EXIT_FAILURE); + } + + memset(&tv, 0, sizeof(tv)); + tv.tv_sec = opts.timeout; + if (opts.timeout && setsockopt(mnl_socket_get_fd(nl), + SOL_SOCKET, SO_RCVTIMEO, + &tv, sizeof(tv))) { + perror("setsockopt(SO_RCVTIMEO)"); + exit(EXIT_FAILURE); + } + + return nl; +} + +static void sleep_ms(uint32_t delay) +{ + struct timespec ts = { .tv_sec = delay / 1000 }; + + delay %= 1000; + + ts.tv_nsec = delay * 1000llu * 1000llu; + + nanosleep(&ts, NULL); +} + +static int mainloop(void) +{ + unsigned int buflen = 64 * 1024 + MNL_SOCKET_BUFFER_SIZE; + struct mnl_socket *nl; + struct nlmsghdr *nlh; + unsigned int portid; + char *buf; + int ret; + + buf = malloc(buflen); + if (!buf) { + perror("malloc"); + exit(EXIT_FAILURE); + } + + nl = open_queue(); + portid = mnl_socket_get_portid(nl); + + for (;;) { + uint32_t id; + + ret = mnl_socket_recvfrom(nl, buf, buflen); + if (ret == -1) { + if (errno == ENOBUFS || errno == EINTR) + continue; + + if (errno == EAGAIN) { + errno = 0; + ret = 0; + break; + } + + perror("mnl_socket_recvfrom"); + exit(EXIT_FAILURE); + } + + ret = mnl_cb_run(buf, ret, 0, portid, queue_cb, NULL); + if (ret < 0) { + perror("mnl_cb_run"); + exit(EXIT_FAILURE); + } + + id = ret - MNL_CB_OK; + if (opts.delay_ms) + sleep_ms(opts.delay_ms); + + nlh = nfq_build_verdict(buf, id, opts.queue_num, opts.verdict); + if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) { + perror("mnl_socket_sendto"); + exit(EXIT_FAILURE); + } + } + + mnl_socket_close(nl); + + return ret; +} + +static void parse_opts(int argc, char **argv) +{ + int c; + + while ((c = getopt(argc, argv, "chvt:q:Q:d:G")) != -1) { + switch (c) { + case 'c': + opts.count_packets = true; + break; + case 'h': + help(argv[0]); + exit(0); + break; + case 'q': + opts.queue_num = atoi(optarg); + if (opts.queue_num > 0xffff) + opts.queue_num = 0; + break; + case 'Q': + opts.verdict = atoi(optarg); + if (opts.verdict > 0xffff) { + fprintf(stderr, "Expected destination queue number\n"); + exit(1); + } + + opts.verdict <<= 16; + opts.verdict |= NF_QUEUE; + break; + case 'd': + opts.delay_ms = atoi(optarg); + if (opts.delay_ms == 0) { + fprintf(stderr, "Expected nonzero delay (in milliseconds)\n"); + exit(1); + } + break; + case 't': + opts.timeout = atoi(optarg); + break; + case 'G': + opts.gso_enabled = false; + break; + case 'v': + opts.verbose++; + break; + } + } + + if (opts.verdict != NF_ACCEPT && (opts.verdict >> 16 == opts.queue_num)) { + fprintf(stderr, "Cannot use same destination and source queue\n"); + exit(1); + } +} + +int main(int argc, char *argv[]) +{ + int ret; + + opts.verdict = NF_ACCEPT; + opts.gso_enabled = true; + + parse_opts(argc, argv); + + ret = mainloop(); + if (opts.count_packets) + print_stats(); + + return ret; +} diff --git a/tools/testing/selftests/netfilter/nf_nat_edemux.sh b/tools/testing/selftests/netfilter/nf_nat_edemux.sh new file mode 100755 index 000000000000..1092bbcb1fba --- /dev/null +++ b/tools/testing/selftests/netfilter/nf_nat_edemux.sh @@ -0,0 +1,99 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Test NAT source port clash resolution +# + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +ret=0 + +sfx=$(mktemp -u "XXXXXXXX") +ns1="ns1-$sfx" +ns2="ns2-$sfx" + +cleanup() +{ + ip netns del $ns1 + ip netns del $ns2 +} + +iperf3 -v > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without iperf3" + exit $ksft_skip +fi + +iptables --version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without iptables" + exit $ksft_skip +fi + +ip -Version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +ip netns add "$ns1" +if [ $? -ne 0 ];then + echo "SKIP: Could not create net namespace $ns1" + exit $ksft_skip +fi + +trap cleanup EXIT + +ip netns add $ns2 + +# Connect the namespaces using a veth pair +ip link add name veth2 type veth peer name veth1 +ip link set netns $ns1 dev veth1 +ip link set netns $ns2 dev veth2 + +ip netns exec $ns1 ip link set up dev lo +ip netns exec $ns1 ip link set up dev veth1 +ip netns exec $ns1 ip addr add 192.168.1.1/24 dev veth1 + +ip netns exec $ns2 ip link set up dev lo +ip netns exec $ns2 ip link set up dev veth2 +ip netns exec $ns2 ip addr add 192.168.1.2/24 dev veth2 + +# Create a server in one namespace +ip netns exec $ns1 iperf3 -s > /dev/null 2>&1 & +iperfs=$! + +# Restrict source port to just one so we don't have to exhaust +# all others. +ip netns exec $ns2 sysctl -q net.ipv4.ip_local_port_range="10000 10000" + +# add a virtual IP using DNAT +ip netns exec $ns2 iptables -t nat -A OUTPUT -d 10.96.0.1/32 -p tcp --dport 443 -j DNAT --to-destination 192.168.1.1:5201 + +# ... and route it to the other namespace +ip netns exec $ns2 ip route add 10.96.0.1 via 192.168.1.1 + +sleep 1 + +# add a persistent connection from the other namespace +ip netns exec $ns2 socat -t 10 - TCP:192.168.1.1:5201 > /dev/null & + +sleep 1 + +# ip daddr:dport will be rewritten to 192.168.1.1 5201 +# NAT must reallocate source port 10000 because +# 192.168.1.2:10000 -> 192.168.1.1:5201 is already in use +echo test | ip netns exec $ns2 socat -t 3 -u STDIN TCP:10.96.0.1:443 >/dev/null +ret=$? + +kill $iperfs + +# Check socat can connect to 10.96.0.1:443 (aka 192.168.1.1:5201). +if [ $ret -eq 0 ]; then + echo "PASS: socat can connect via NAT'd address" +else + echo "FAIL: socat cannot connect via NAT'd address" + exit 1 +fi + +exit 0 diff --git a/tools/testing/selftests/netfilter/nft_concat_range.sh b/tools/testing/selftests/netfilter/nft_concat_range.sh index 5a4938d6dcf2..e908009576c7 100755 --- a/tools/testing/selftests/netfilter/nft_concat_range.sh +++ b/tools/testing/selftests/netfilter/nft_concat_range.sh @@ -23,15 +23,15 @@ TESTS="reported_issues correctness concurrency timeout" # Set types, defined by TYPE_ variables below TYPES="net_port port_net net6_port port_proto net6_port_mac net6_port_mac_proto - net_port_net net_mac net_mac_icmp net6_mac_icmp net6_port_net6_port - net_port_mac_proto_net" + net_port_net net_mac mac_net net_mac_icmp net6_mac_icmp + net6_port_net6_port net_port_mac_proto_net" # Reported bugs, also described by TYPE_ variables below -BUGS="flush_remove_add" +BUGS="flush_remove_add reload" # List of possible paths to pktgen script from kernel tree for performance tests PKTGEN_SCRIPT_PATHS=" - ../../../samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh + ../../../../samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh pktgen/pktgen_bench_xmit_mode_netif_receive.sh" # Definition of set types: @@ -91,7 +91,7 @@ src start 1 count 5 src_delta 2000 -tools sendip nc bash +tools sendip socat nc bash proto udp race_repeat 3 @@ -116,7 +116,7 @@ src start 10 count 5 src_delta 2000 -tools sendip nc bash +tools sendip socat nc bash proto udp6 race_repeat 3 @@ -141,7 +141,7 @@ src start 1 count 5 src_delta 2000 -tools sendip nc bash +tools sendip socat nc bash proto udp race_repeat 0 @@ -163,7 +163,7 @@ src mac start 10 count 5 src_delta 2000 -tools sendip nc bash +tools sendip socat nc bash proto udp6 race_repeat 0 @@ -185,7 +185,7 @@ src mac proto start 10 count 5 src_delta 2000 -tools sendip nc bash +tools sendip socat nc bash proto udp6 race_repeat 0 @@ -207,7 +207,7 @@ src addr4 start 1 count 5 src_delta 2000 -tools sendip nc bash +tools sendip socat nc bash proto udp race_repeat 3 @@ -227,7 +227,7 @@ src addr6 port start 10 count 5 src_delta 2000 -tools sendip nc +tools sendip socat nc proto udp6 race_repeat 3 @@ -247,7 +247,7 @@ src mac proto addr4 start 1 count 5 src_delta 2000 -tools sendip nc bash +tools sendip socat nc bash proto udp race_repeat 0 @@ -264,7 +264,7 @@ src mac start 1 count 5 src_delta 2000 -tools sendip nc bash +tools sendip socat nc bash proto udp race_repeat 0 @@ -277,6 +277,23 @@ perf_entries 1000 perf_proto ipv4 " +TYPE_mac_net=" +display mac,net +type_spec ether_addr . ipv4_addr +chain_spec ether saddr . ip saddr +dst +src mac addr4 +start 1 +count 5 +src_delta 2000 +tools sendip socat nc bash +proto udp + +race_repeat 0 + +perf_duration 0 +" + TYPE_net_mac_icmp=" display net,mac - ICMP type_spec ipv4_addr . ether_addr @@ -320,7 +337,7 @@ src addr4 start 1 count 5 src_delta 2000 -tools sendip nc +tools sendip socat nc proto udp race_repeat 3 @@ -337,6 +354,23 @@ TYPE_flush_remove_add=" display Add two elements, flush, re-add " +TYPE_reload=" +display net,mac with reload +type_spec ipv4_addr . ether_addr +chain_spec ip daddr . ether saddr +dst addr4 +src mac +start 1 +count 1 +src_delta 2000 +tools sendip socat nc bash +proto udp + +race_repeat 0 + +perf_duration 0 +" + # Set template for all tests, types and rules are filled in depending on test set_template=' flush ruleset @@ -507,6 +541,24 @@ setup_send_udp() { dst_port= src_addr4= } + elif command -v socat -v >/dev/null; then + send_udp() { + if [ -n "${src_addr4}" ]; then + B ip addr add "${src_addr4}" dev veth_b + __socatbind=",bind=${src_addr4}" + if [ -n "${src_port}" ];then + __socatbind="${__socatbind}:${src_port}" + fi + fi + + ip addr add "${dst_addr4}" dev veth_a 2>/dev/null + [ -z "${dst_port}" ] && dst_port=12345 + + echo "test4" | B socat -t 0.01 STDIN UDP4-DATAGRAM:${dst_addr4}:${dst_port}"${__socatbind}" + + src_addr4= + src_port= + } elif command -v nc >/dev/null; then if nc -u -w0 1.1.1.1 1 2>/dev/null; then # OpenBSD netcat @@ -572,6 +624,29 @@ setup_send_udp6() { dst_port= src_addr6= } + elif command -v socat -v >/dev/null; then + send_udp6() { + ip -6 addr add "${dst_addr6}" dev veth_a nodad \ + 2>/dev/null + + __socatbind6= + + if [ -n "${src_addr6}" ]; then + if [ -n "${src_addr6} != "${src_addr6_added} ]; then + B ip addr add "${src_addr6}" dev veth_b nodad + + src_addr6_added=${src_addr6} + fi + + __socatbind6=",bind=[${src_addr6}]" + + if [ -n "${src_port}" ] ;then + __socatbind6="${__socatbind6}:${src_port}" + fi + fi + + echo "test6" | B socat -t 0.01 STDIN UDP6-DATAGRAM:[${dst_addr6}]:${dst_port}"${__socatbind6}" + } elif command -v nc >/dev/null && nc -u -w0 1.1.1.1 1 2>/dev/null; then # GNU netcat might not work with IPv6, try next tool send_udp6() { @@ -984,7 +1059,8 @@ format() { fi done for f in ${src}; do - __expr="${__expr} . " + [ "${__expr}" != "{ " ] && __expr="${__expr} . " + __start="$(eval format_"${f}" "${srcstart}")" __end="$(eval format_"${f}" "${srcend}")" @@ -1455,6 +1531,59 @@ test_bug_flush_remove_add() { nft flush ruleset } +# - add ranged element, check that packets match it +# - reload the set, check packets still match +test_bug_reload() { + setup veth send_"${proto}" set || return ${KSELFTEST_SKIP} + rstart=${start} + + range_size=1 + for i in $(seq "${start}" $((start + count))); do + end=$((start + range_size)) + + # Avoid negative or zero-sized port ranges + if [ $((end / 65534)) -gt $((start / 65534)) ]; then + start=${end} + end=$((end + 1)) + fi + srcstart=$((start + src_delta)) + srcend=$((end + src_delta)) + + add "$(format)" || return 1 + range_size=$((range_size + 1)) + start=$((end + range_size)) + done + + # check kernel does allocate pcpu sctrach map + # for reload with no elemet add/delete + ( echo flush set inet filter test ; + nft list set inet filter test ) | nft -f - + + start=${rstart} + range_size=1 + + for i in $(seq "${start}" $((start + count))); do + end=$((start + range_size)) + + # Avoid negative or zero-sized port ranges + if [ $((end / 65534)) -gt $((start / 65534)) ]; then + start=${end} + end=$((end + 1)) + fi + srcstart=$((start + src_delta)) + srcend=$((end + src_delta)) + + for j in $(seq ${start} $((range_size / 2 + 1)) ${end}); do + send_match "${j}" $((j + src_delta)) || return 1 + done + + range_size=$((range_size + 1)) + start=$((end + range_size)) + done + + nft flush ruleset +} + test_reported_issues() { eval test_bug_"${subtest}" } @@ -1513,4 +1642,4 @@ for name in ${TESTS}; do done done -[ ${passed} -eq 0 ] && exit ${KSELFTEST_SKIP} +[ ${passed} -eq 0 ] && exit ${KSELFTEST_SKIP} || exit 0 diff --git a/tools/testing/selftests/netfilter/nft_conntrack_helper.sh b/tools/testing/selftests/netfilter/nft_conntrack_helper.sh new file mode 100755 index 000000000000..faa7778d7bd1 --- /dev/null +++ b/tools/testing/selftests/netfilter/nft_conntrack_helper.sh @@ -0,0 +1,197 @@ +#!/bin/bash +# +# This tests connection tracking helper assignment: +# 1. can attach ftp helper to a connection from nft ruleset. +# 2. auto-assign still works. +# +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +ret=0 + +sfx=$(mktemp -u "XXXXXXXX") +ns1="ns1-$sfx" +ns2="ns2-$sfx" +testipv6=1 + +cleanup() +{ + ip netns del ${ns1} + ip netns del ${ns2} +} + +nft --version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without nft tool" + exit $ksft_skip +fi + +ip -Version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +conntrack -V > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without conntrack tool" + exit $ksft_skip +fi + +which nc >/dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without netcat tool" + exit $ksft_skip +fi + +trap cleanup EXIT + +ip netns add ${ns1} +ip netns add ${ns2} + +ip link add veth0 netns ${ns1} type veth peer name veth0 netns ${ns2} > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: No virtual ethernet pair device support in kernel" + exit $ksft_skip +fi + +ip -net ${ns1} link set lo up +ip -net ${ns1} link set veth0 up + +ip -net ${ns2} link set lo up +ip -net ${ns2} link set veth0 up + +ip -net ${ns1} addr add 10.0.1.1/24 dev veth0 +ip -net ${ns1} addr add dead:1::1/64 dev veth0 + +ip -net ${ns2} addr add 10.0.1.2/24 dev veth0 +ip -net ${ns2} addr add dead:1::2/64 dev veth0 + +load_ruleset_family() { + local family=$1 + local ns=$2 + +ip netns exec ${ns} nft -f - <<EOF +table $family raw { + ct helper ftp { + type "ftp" protocol tcp + } + chain pre { + type filter hook prerouting priority 0; policy accept; + tcp dport 2121 ct helper set "ftp" + } + chain output { + type filter hook output priority 0; policy accept; + tcp dport 2121 ct helper set "ftp" + } +} +EOF + return $? +} + +check_for_helper() +{ + local netns=$1 + local message=$2 + local port=$3 + + if echo $message |grep -q 'ipv6';then + local family="ipv6" + else + local family="ipv4" + fi + + ip netns exec ${netns} conntrack -L -f $family -p tcp --dport $port 2> /dev/null |grep -q 'helper=ftp' + if [ $? -ne 0 ] ; then + if [ $autoassign -eq 0 ] ;then + echo "FAIL: ${netns} did not show attached helper $message" 1>&2 + ret=1 + else + echo "PASS: ${netns} did not show attached helper $message" 1>&2 + fi + else + if [ $autoassign -eq 0 ] ;then + echo "PASS: ${netns} connection on port $port has ftp helper attached" 1>&2 + else + echo "FAIL: ${netns} connection on port $port has ftp helper attached" 1>&2 + ret=1 + fi + fi + + return 0 +} + +test_helper() +{ + local port=$1 + local autoassign=$2 + + if [ $autoassign -eq 0 ] ;then + msg="set via ruleset" + else + msg="auto-assign" + fi + + sleep 3 | ip netns exec ${ns2} nc -w 2 -l -p $port > /dev/null & + + sleep 1 | ip netns exec ${ns1} nc -w 2 10.0.1.2 $port > /dev/null & + sleep 1 + + check_for_helper "$ns1" "ip $msg" $port $autoassign + check_for_helper "$ns2" "ip $msg" $port $autoassign + + wait + + if [ $testipv6 -eq 0 ] ;then + return 0 + fi + + ip netns exec ${ns1} conntrack -F 2> /dev/null + ip netns exec ${ns2} conntrack -F 2> /dev/null + + sleep 3 | ip netns exec ${ns2} nc -w 2 -6 -l -p $port > /dev/null & + + sleep 1 | ip netns exec ${ns1} nc -w 2 -6 dead:1::2 $port > /dev/null & + sleep 1 + + check_for_helper "$ns1" "ipv6 $msg" $port + check_for_helper "$ns2" "ipv6 $msg" $port + + wait +} + +load_ruleset_family ip ${ns1} +if [ $? -ne 0 ];then + echo "FAIL: ${ns1} cannot load ip ruleset" 1>&2 + exit 1 +fi + +load_ruleset_family ip6 ${ns1} +if [ $? -ne 0 ];then + echo "SKIP: ${ns1} cannot load ip6 ruleset" 1>&2 + testipv6=0 +fi + +load_ruleset_family inet ${ns2} +if [ $? -ne 0 ];then + echo "SKIP: ${ns1} cannot load inet ruleset" 1>&2 + load_ruleset_family ip ${ns2} + if [ $? -ne 0 ];then + echo "FAIL: ${ns2} cannot load ip ruleset" 1>&2 + exit 1 + fi + + if [ $testipv6 -eq 1 ] ;then + load_ruleset_family ip6 ${ns2} + if [ $? -ne 0 ];then + echo "FAIL: ${ns2} cannot load ip6 ruleset" 1>&2 + exit 1 + fi + fi +fi + +test_helper 2121 0 +ip netns exec ${ns1} sysctl -qe 'net.netfilter.nf_conntrack_helper=1' +ip netns exec ${ns2} sysctl -qe 'net.netfilter.nf_conntrack_helper=1' +test_helper 21 1 + +exit $ret diff --git a/tools/testing/selftests/netfilter/nft_fib.sh b/tools/testing/selftests/netfilter/nft_fib.sh new file mode 100755 index 000000000000..dff476e45e77 --- /dev/null +++ b/tools/testing/selftests/netfilter/nft_fib.sh @@ -0,0 +1,273 @@ +#!/bin/bash +# +# This tests the fib expression. +# +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +ret=0 + +sfx=$(mktemp -u "XXXXXXXX") +ns1="ns1-$sfx" +ns2="ns2-$sfx" +nsrouter="nsrouter-$sfx" +timeout=4 + +log_netns=$(sysctl -n net.netfilter.nf_log_all_netns) + +cleanup() +{ + ip netns del ${ns1} + ip netns del ${ns2} + ip netns del ${nsrouter} + + [ $log_netns -eq 0 ] && sysctl -q net.netfilter.nf_log_all_netns=$log_netns +} + +nft --version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without nft tool" + exit $ksft_skip +fi + +ip -Version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +ip netns add ${nsrouter} +if [ $? -ne 0 ];then + echo "SKIP: Could not create net namespace" + exit $ksft_skip +fi + +trap cleanup EXIT + +dmesg | grep -q ' nft_rpfilter: ' +if [ $? -eq 0 ]; then + dmesg -c | grep ' nft_rpfilter: ' + echo "WARN: a previous test run has failed" 1>&2 +fi + +sysctl -q net.netfilter.nf_log_all_netns=1 +ip netns add ${ns1} +ip netns add ${ns2} + +load_ruleset() { + local netns=$1 + +ip netns exec ${netns} nft -f /dev/stdin <<EOF +table inet filter { + chain prerouting { + type filter hook prerouting priority 0; policy accept; + fib saddr . iif oif missing counter log prefix "$netns nft_rpfilter: " drop + } +} +EOF +} + +load_pbr_ruleset() { + local netns=$1 + +ip netns exec ${netns} nft -f /dev/stdin <<EOF +table inet filter { + chain forward { + type filter hook forward priority raw; + fib saddr . iif oif gt 0 accept + log drop + } +} +EOF +} + +load_ruleset_count() { + local netns=$1 + +ip netns exec ${netns} nft -f /dev/stdin <<EOF +table inet filter { + chain prerouting { + type filter hook prerouting priority 0; policy accept; + ip daddr 1.1.1.1 fib saddr . iif oif missing counter drop + ip6 daddr 1c3::c01d fib saddr . iif oif missing counter drop + } +} +EOF +} + +check_drops() { + dmesg | grep -q ' nft_rpfilter: ' + if [ $? -eq 0 ]; then + dmesg | grep ' nft_rpfilter: ' + echo "FAIL: rpfilter did drop packets" + return 1 + fi + + return 0 +} + +check_fib_counter() { + local want=$1 + local ns=$2 + local address=$3 + + line=$(ip netns exec ${ns} nft list table inet filter | grep 'fib saddr . iif' | grep $address | grep "packets $want" ) + ret=$? + + if [ $ret -ne 0 ];then + echo "Netns $ns fib counter doesn't match expected packet count of $want for $address" 1>&2 + ip netns exec ${ns} nft list table inet filter + return 1 + fi + + if [ $want -gt 0 ]; then + echo "PASS: fib expression did drop packets for $address" + fi + + return 0 +} + +load_ruleset ${nsrouter} +load_ruleset ${ns1} +load_ruleset ${ns2} + +ip link add veth0 netns ${nsrouter} type veth peer name eth0 netns ${ns1} > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: No virtual ethernet pair device support in kernel" + exit $ksft_skip +fi +ip link add veth1 netns ${nsrouter} type veth peer name eth0 netns ${ns2} + +ip -net ${nsrouter} link set lo up +ip -net ${nsrouter} link set veth0 up +ip -net ${nsrouter} addr add 10.0.1.1/24 dev veth0 +ip -net ${nsrouter} addr add dead:1::1/64 dev veth0 + +ip -net ${nsrouter} link set veth1 up +ip -net ${nsrouter} addr add 10.0.2.1/24 dev veth1 +ip -net ${nsrouter} addr add dead:2::1/64 dev veth1 + +ip -net ${ns1} link set lo up +ip -net ${ns1} link set eth0 up + +ip -net ${ns2} link set lo up +ip -net ${ns2} link set eth0 up + +ip -net ${ns1} addr add 10.0.1.99/24 dev eth0 +ip -net ${ns1} addr add dead:1::99/64 dev eth0 +ip -net ${ns1} route add default via 10.0.1.1 +ip -net ${ns1} route add default via dead:1::1 + +ip -net ${ns2} addr add 10.0.2.99/24 dev eth0 +ip -net ${ns2} addr add dead:2::99/64 dev eth0 +ip -net ${ns2} route add default via 10.0.2.1 +ip -net ${ns2} route add default via dead:2::1 + +test_ping() { + local daddr4=$1 + local daddr6=$2 + + ip netns exec ${ns1} ping -c 1 -q $daddr4 > /dev/null + ret=$? + if [ $ret -ne 0 ];then + check_drops + echo "FAIL: ${ns1} cannot reach $daddr4, ret $ret" 1>&2 + return 1 + fi + + ip netns exec ${ns1} ping -c 3 -q $daddr6 > /dev/null + ret=$? + if [ $ret -ne 0 ];then + check_drops + echo "FAIL: ${ns1} cannot reach $daddr6, ret $ret" 1>&2 + return 1 + fi + + return 0 +} + +ip netns exec ${nsrouter} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null +ip netns exec ${nsrouter} sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null +ip netns exec ${nsrouter} sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null +ip netns exec ${nsrouter} sysctl net.ipv4.conf.all.rp_filter=0 > /dev/null +ip netns exec ${nsrouter} sysctl net.ipv4.conf.veth0.rp_filter=0 > /dev/null + +sleep 3 + +test_ping 10.0.2.1 dead:2::1 || exit 1 +check_drops || exit 1 + +test_ping 10.0.2.99 dead:2::99 || exit 1 +check_drops || exit 1 + +echo "PASS: fib expression did not cause unwanted packet drops" + +ip netns exec ${nsrouter} nft flush table inet filter + +ip -net ${ns1} route del default +ip -net ${ns1} -6 route del default + +ip -net ${ns1} addr del 10.0.1.99/24 dev eth0 +ip -net ${ns1} addr del dead:1::99/64 dev eth0 + +ip -net ${ns1} addr add 10.0.2.99/24 dev eth0 +ip -net ${ns1} addr add dead:2::99/64 dev eth0 + +ip -net ${ns1} route add default via 10.0.2.1 +ip -net ${ns1} -6 route add default via dead:2::1 + +ip -net ${nsrouter} addr add dead:2::1/64 dev veth0 + +# switch to ruleset that doesn't log, this time +# its expected that this does drop the packets. +load_ruleset_count ${nsrouter} + +# ns1 has a default route, but nsrouter does not. +# must not check return value, ping to 1.1.1.1 will +# fail. +check_fib_counter 0 ${nsrouter} 1.1.1.1 || exit 1 +check_fib_counter 0 ${nsrouter} 1c3::c01d || exit 1 + +ip netns exec ${ns1} ping -c 1 -W 1 -q 1.1.1.1 > /dev/null +check_fib_counter 1 ${nsrouter} 1.1.1.1 || exit 1 + +sleep 2 +ip netns exec ${ns1} ping -c 3 -q 1c3::c01d > /dev/null +check_fib_counter 3 ${nsrouter} 1c3::c01d || exit 1 + +# delete all rules +ip netns exec ${ns1} nft flush ruleset +ip netns exec ${ns2} nft flush ruleset +ip netns exec ${nsrouter} nft flush ruleset + +ip -net ${ns1} addr add 10.0.1.99/24 dev eth0 +ip -net ${ns1} addr add dead:1::99/64 dev eth0 + +ip -net ${ns1} addr del 10.0.2.99/24 dev eth0 +ip -net ${ns1} addr del dead:2::99/64 dev eth0 + +ip -net ${nsrouter} addr del dead:2::1/64 dev veth0 + +# ... pbr ruleset for the router, check iif+oif. +load_pbr_ruleset ${nsrouter} +if [ $? -ne 0 ] ; then + echo "SKIP: Could not load fib forward ruleset" + exit $ksft_skip +fi + +ip -net ${nsrouter} rule add from all table 128 +ip -net ${nsrouter} rule add from all iif veth0 table 129 +ip -net ${nsrouter} route add table 128 to 10.0.1.0/24 dev veth0 +ip -net ${nsrouter} route add table 129 to 10.0.2.0/24 dev veth1 + +# drop main ipv4 table +ip -net ${nsrouter} -4 rule delete table main + +test_ping 10.0.2.99 dead:2::99 +if [ $? -ne 0 ] ; then + ip -net ${nsrouter} nft list ruleset + echo "FAIL: fib mismatch in pbr setup" + exit 1 +fi + +echo "PASS: fib expression forward check with policy based routing" +exit 0 diff --git a/tools/testing/selftests/netfilter/nft_flowtable.sh b/tools/testing/selftests/netfilter/nft_flowtable.sh index d3e0809ab368..7060bae04ec8 100755 --- a/tools/testing/selftests/netfilter/nft_flowtable.sh +++ b/tools/testing/selftests/netfilter/nft_flowtable.sh @@ -2,62 +2,57 @@ # SPDX-License-Identifier: GPL-2.0 # # This tests basic flowtable functionality. -# Creates following topology: +# Creates following default topology: # # Originator (MTU 9000) <-Router1-> MTU 1500 <-Router2-> Responder (MTU 2000) # Router1 is the one doing flow offloading, Router2 has no special # purpose other than having a link that is smaller than either Originator # and responder, i.e. TCPMSS announced values are too large and will still # result in fragmentation and/or PMTU discovery. +# +# You can check with different Orgininator/Link/Responder MTU eg: +# nft_flowtable.sh -o8000 -l1500 -r2000 +# + +sfx=$(mktemp -u "XXXXXXXX") +ns1="ns1-$sfx" +ns2="ns2-$sfx" +nsr1="nsr1-$sfx" +nsr2="nsr2-$sfx" # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 ret=0 -ns1in="" -ns2in="" +nsin="" ns1out="" ns2out="" log_netns=$(sysctl -n net.netfilter.nf_log_all_netns) -nft --version > /dev/null 2>&1 -if [ $? -ne 0 ];then - echo "SKIP: Could not run test without nft tool" - exit $ksft_skip -fi - -ip -Version > /dev/null 2>&1 -if [ $? -ne 0 ];then - echo "SKIP: Could not run test without ip tool" - exit $ksft_skip -fi - -which nc > /dev/null 2>&1 -if [ $? -ne 0 ];then - echo "SKIP: Could not run test without nc (netcat)" - exit $ksft_skip -fi - -ip netns add nsr1 -if [ $? -ne 0 ];then - echo "SKIP: Could not create net namespace" - exit $ksft_skip -fi +checktool (){ + if ! $1 > /dev/null 2>&1; then + echo "SKIP: Could not $2" + exit $ksft_skip + fi +} -ip netns add ns1 -ip netns add ns2 +checktool "nft --version" "run test without nft tool" +checktool "ip -Version" "run test without ip tool" +checktool "which nc" "run test without nc (netcat)" +checktool "ip netns add $nsr1" "create net namespace $nsr1" -ip netns add nsr2 +ip netns add $ns1 +ip netns add $ns2 +ip netns add $nsr2 cleanup() { - for i in 1 2; do - ip netns del ns$i - ip netns del nsr$i - done + ip netns del $ns1 + ip netns del $ns2 + ip netns del $nsr1 + ip netns del $nsr2 - rm -f "$ns1in" "$ns1out" - rm -f "$ns2in" "$ns2out" + rm -f "$nsin" "$ns1out" "$ns2out" [ $log_netns -eq 0 ] && sysctl -q net.netfilter.nf_log_all_netns=$log_netns } @@ -66,22 +61,21 @@ trap cleanup EXIT sysctl -q net.netfilter.nf_log_all_netns=1 -ip link add veth0 netns nsr1 type veth peer name eth0 netns ns1 -ip link add veth1 netns nsr1 type veth peer name veth0 netns nsr2 +ip link add veth0 netns $nsr1 type veth peer name eth0 netns $ns1 +ip link add veth1 netns $nsr1 type veth peer name veth0 netns $nsr2 -ip link add veth1 netns nsr2 type veth peer name eth0 netns ns2 +ip link add veth1 netns $nsr2 type veth peer name eth0 netns $ns2 for dev in lo veth0 veth1; do - for i in 1 2; do - ip -net nsr$i link set $dev up - done + ip -net $nsr1 link set $dev up + ip -net $nsr2 link set $dev up done -ip -net nsr1 addr add 10.0.1.1/24 dev veth0 -ip -net nsr1 addr add dead:1::1/64 dev veth0 +ip -net $nsr1 addr add 10.0.1.1/24 dev veth0 +ip -net $nsr1 addr add dead:1::1/64 dev veth0 -ip -net nsr2 addr add 10.0.2.1/24 dev veth1 -ip -net nsr2 addr add dead:2::1/64 dev veth1 +ip -net $nsr2 addr add 10.0.2.1/24 dev veth1 +ip -net $nsr2 addr add dead:2::1/64 dev veth1 # set different MTUs so we need to push packets coming from ns1 (large MTU) # to ns2 (smaller MTU) to stack either to perform fragmentation (ip_no_pmtu_disc=1), @@ -89,76 +83,100 @@ ip -net nsr2 addr add dead:2::1/64 dev veth1 # ns2 is going via nsr2 with a smaller mtu, so that TCPMSS announced by both peers # is NOT the lowest link mtu. -ip -net nsr1 link set veth0 mtu 9000 -ip -net ns1 link set eth0 mtu 9000 +omtu=9000 +lmtu=1500 +rmtu=2000 + +usage(){ + echo "nft_flowtable.sh [OPTIONS]" + echo + echo "MTU options" + echo " -o originator" + echo " -l link" + echo " -r responder" + exit 1 +} + +while getopts "o:l:r:" o +do + case $o in + o) omtu=$OPTARG;; + l) lmtu=$OPTARG;; + r) rmtu=$OPTARG;; + *) usage;; + esac +done + +if ! ip -net $nsr1 link set veth0 mtu $omtu; then + exit 1 +fi + +ip -net $ns1 link set eth0 mtu $omtu -ip -net nsr2 link set veth1 mtu 2000 -ip -net ns2 link set eth0 mtu 2000 +if ! ip -net $nsr2 link set veth1 mtu $rmtu; then + exit 1 +fi + +ip -net $ns2 link set eth0 mtu $rmtu # transfer-net between nsr1 and nsr2. # these addresses are not used for connections. -ip -net nsr1 addr add 192.168.10.1/24 dev veth1 -ip -net nsr1 addr add fee1:2::1/64 dev veth1 +ip -net $nsr1 addr add 192.168.10.1/24 dev veth1 +ip -net $nsr1 addr add fee1:2::1/64 dev veth1 -ip -net nsr2 addr add 192.168.10.2/24 dev veth0 -ip -net nsr2 addr add fee1:2::2/64 dev veth0 +ip -net $nsr2 addr add 192.168.10.2/24 dev veth0 +ip -net $nsr2 addr add fee1:2::2/64 dev veth0 -for i in 1 2; do - ip netns exec nsr$i sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null - ip netns exec nsr$i sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null +for i in 0 1; do + ip netns exec $nsr1 sysctl net.ipv4.conf.veth$i.forwarding=1 > /dev/null + ip netns exec $nsr2 sysctl net.ipv4.conf.veth$i.forwarding=1 > /dev/null +done - ip -net ns$i link set lo up - ip -net ns$i link set eth0 up - ip -net ns$i addr add 10.0.$i.99/24 dev eth0 - ip -net ns$i route add default via 10.0.$i.1 - ip -net ns$i addr add dead:$i::99/64 dev eth0 - ip -net ns$i route add default via dead:$i::1 - ip netns exec ns$i sysctl net.ipv4.tcp_no_metrics_save=1 > /dev/null +for ns in $ns1 $ns2;do + ip -net $ns link set lo up + ip -net $ns link set eth0 up + if ! ip netns exec $ns sysctl net.ipv4.tcp_no_metrics_save=1 > /dev/null; then + echo "ERROR: Check Originator/Responder values (problem during address addition)" + exit 1 + fi # don't set ip DF bit for first two tests - ip netns exec ns$i sysctl net.ipv4.ip_no_pmtu_disc=1 > /dev/null + ip netns exec $ns sysctl net.ipv4.ip_no_pmtu_disc=1 > /dev/null done -ip -net nsr1 route add default via 192.168.10.2 -ip -net nsr2 route add default via 192.168.10.1 +ip -net $ns1 addr add 10.0.1.99/24 dev eth0 +ip -net $ns2 addr add 10.0.2.99/24 dev eth0 +ip -net $ns1 route add default via 10.0.1.1 +ip -net $ns2 route add default via 10.0.2.1 +ip -net $ns1 addr add dead:1::99/64 dev eth0 +ip -net $ns2 addr add dead:2::99/64 dev eth0 +ip -net $ns1 route add default via dead:1::1 +ip -net $ns2 route add default via dead:2::1 -ip netns exec nsr1 nft -f - <<EOF +ip -net $nsr1 route add default via 192.168.10.2 +ip -net $nsr2 route add default via 192.168.10.1 + +ip netns exec $nsr1 nft -f - <<EOF table inet filter { flowtable f1 { hook ingress priority 0 devices = { veth0, veth1 } } + counter routed_orig { } + counter routed_repl { } + chain forward { type filter hook forward priority 0; policy drop; # flow offloaded? Tag ct with mark 1, so we can detect when it fails. - meta oif "veth1" tcp dport 12345 flow offload @f1 counter - - # use packet size to trigger 'should be offloaded by now'. - # otherwise, if 'flow offload' expression never offloads, the - # test will pass. - tcp dport 12345 meta length gt 200 ct mark set 1 counter - - # this turns off flow offloading internally, so expect packets again - tcp flags fin,rst ct mark set 0 accept - - # this allows large packets from responder, we need this as long - # as PMTUd is off. - # This rule is deleted for the last test, when we expect PMTUd - # to kick in and ensure all packets meet mtu requirements. - meta length gt 1500 accept comment something-to-grep-for + meta oif "veth1" tcp dport 12345 ct mark set 1 flow add @f1 counter name routed_orig accept - # next line blocks connection w.o. working offload. - # we only do this for reverse dir, because we expect packets to - # enter slow path due to MTU mismatch of veth0 and veth1. - tcp sport 12345 ct mark 1 counter log prefix "mark failure " drop + # count packets supposedly offloaded as per direction. + ct mark 1 counter name ct direction map { original : routed_orig, reply : routed_repl } accept ct state established,related accept - # for packets that we can't offload yet, i.e. SYN (any ct that is not confirmed) - meta length lt 200 oif "veth1" tcp dport 12345 counter accept - meta nfproto ipv4 meta l4proto icmp accept meta nfproto ipv6 meta l4proto icmpv6 accept } @@ -171,34 +189,30 @@ if [ $? -ne 0 ]; then fi # test basic connectivity -ip netns exec ns1 ping -c 1 -q 10.0.2.99 > /dev/null -if [ $? -ne 0 ];then - echo "ERROR: ns1 cannot reach ns2" 1>&2 - bash +if ! ip netns exec $ns1 ping -c 1 -q 10.0.2.99 > /dev/null; then + echo "ERROR: $ns1 cannot reach ns2" 1>&2 exit 1 fi -ip netns exec ns2 ping -c 1 -q 10.0.1.99 > /dev/null -if [ $? -ne 0 ];then - echo "ERROR: ns2 cannot reach ns1" 1>&2 +if ! ip netns exec $ns2 ping -c 1 -q 10.0.1.99 > /dev/null; then + echo "ERROR: $ns2 cannot reach $ns1" 1>&2 exit 1 fi if [ $ret -eq 0 ];then - echo "PASS: netns routing/connectivity: ns1 can reach ns2" + echo "PASS: netns routing/connectivity: $ns1 can reach $ns2" fi -ns1in=$(mktemp) +nsin=$(mktemp) ns1out=$(mktemp) -ns2in=$(mktemp) ns2out=$(mktemp) make_file() { name=$1 - who=$2 - SIZE=$((RANDOM % (1024 * 8))) + SIZE=$((RANDOM % (1024 * 128))) + SIZE=$((SIZE + (1024 * 8))) TSIZE=$((SIZE * 1024)) dd if=/dev/urandom of="$name" bs=1024 count=$SIZE 2> /dev/null @@ -209,14 +223,45 @@ make_file() dd if=/dev/urandom conf=notrunc of="$name" bs=1 count=$SIZE 2> /dev/null } +check_counters() +{ + local what=$1 + local ok=1 + + local orig=$(ip netns exec $nsr1 nft reset counter inet filter routed_orig | grep packets) + local repl=$(ip netns exec $nsr1 nft reset counter inet filter routed_repl | grep packets) + + local orig_cnt=${orig#*bytes} + local repl_cnt=${repl#*bytes} + + local fs=$(du -sb $nsin) + local max_orig=${fs%%/*} + local max_repl=$((max_orig/4)) + + if [ $orig_cnt -gt $max_orig ];then + echo "FAIL: $what: original counter $orig_cnt exceeds expected value $max_orig" 1>&2 + ret=1 + ok=0 + fi + + if [ $repl_cnt -gt $max_repl ];then + echo "FAIL: $what: reply counter $repl_cnt exceeds expected value $max_repl" 1>&2 + ret=1 + ok=0 + fi + + if [ $ok -eq 1 ]; then + echo "PASS: $what" + fi +} + check_transfer() { in=$1 out=$2 what=$3 - cmp "$in" "$out" > /dev/null 2>&1 - if [ $? -ne 0 ] ;then + if ! cmp "$in" "$out" > /dev/null 2>&1; then echo "FAIL: file mismatch for $what" 1>&2 ls -l "$in" ls -l "$out" @@ -234,26 +279,30 @@ test_tcp_forwarding_ip() local dstport=$4 local lret=0 - ip netns exec $nsb nc -w 5 -l -p 12345 < "$ns2in" > "$ns2out" & + ip netns exec $nsb nc -w 5 -l -p 12345 < "$nsin" > "$ns2out" & lpid=$! sleep 1 - ip netns exec $nsa nc -w 4 "$dstip" "$dstport" < "$ns1in" > "$ns1out" & + ip netns exec $nsa nc -w 4 "$dstip" "$dstport" < "$nsin" > "$ns1out" & cpid=$! sleep 3 - kill $lpid - kill $cpid + if ps -p $lpid > /dev/null;then + kill $lpid + fi + + if ps -p $cpid > /dev/null;then + kill $cpid + fi + wait - check_transfer "$ns1in" "$ns2out" "ns1 -> ns2" - if [ $? -ne 0 ];then + if ! check_transfer "$nsin" "$ns2out" "ns1 -> ns2"; then lret=1 fi - check_transfer "$ns2in" "$ns1out" "ns1 <- ns2" - if [ $? -ne 0 ];then + if ! check_transfer "$nsin" "$ns1out" "ns1 <- ns2"; then lret=1 fi @@ -270,42 +319,59 @@ test_tcp_forwarding() test_tcp_forwarding_nat() { local lret + local pmtu test_tcp_forwarding_ip "$1" "$2" 10.0.2.99 12345 lret=$? + pmtu=$3 + what=$4 + if [ $lret -eq 0 ] ; then + if [ $pmtu -eq 1 ] ;then + check_counters "flow offload for ns1/ns2 with masquerade and pmtu discovery $what" + else + echo "PASS: flow offload for ns1/ns2 with masquerade $what" + fi + test_tcp_forwarding_ip "$1" "$2" 10.6.6.6 1666 lret=$? + if [ $pmtu -eq 1 ] ;then + check_counters "flow offload for ns1/ns2 with dnat and pmtu discovery $what" + elif [ $lret -eq 0 ] ; then + echo "PASS: flow offload for ns1/ns2 with dnat $what" + fi fi return $lret } -make_file "$ns1in" "ns1" -make_file "$ns2in" "ns2" +make_file "$nsin" # First test: # No PMTU discovery, nsr1 is expected to fragment packets from ns1 to ns2 as needed. -test_tcp_forwarding ns1 ns2 -if [ $? -eq 0 ] ;then +# Due to MTU mismatch in both directions, all packets (except small packets like pure +# acks) have to be handled by normal forwarding path. Therefore, packet counters +# are not checked. +if test_tcp_forwarding $ns1 $ns2; then echo "PASS: flow offloaded for ns1/ns2" else echo "FAIL: flow offload for ns1/ns2:" 1>&2 - ip netns exec nsr1 nft list ruleset + ip netns exec $nsr1 nft list ruleset ret=1 fi # delete default route, i.e. ns2 won't be able to reach ns1 and # will depend on ns1 being masqueraded in nsr1. # expect ns1 has nsr1 address. -ip -net ns2 route del default via 10.0.2.1 -ip -net ns2 route del default via dead:2::1 -ip -net ns2 route add 192.168.10.1 via 10.0.2.1 +ip -net $ns2 route del default via 10.0.2.1 +ip -net $ns2 route del default via dead:2::1 +ip -net $ns2 route add 192.168.10.1 via 10.0.2.1 # Second test: -# Same, but with NAT enabled. -ip netns exec nsr1 nft -f - <<EOF +# Same, but with NAT enabled. Same as in first test: we expect normal forward path +# to handle most packets. +ip netns exec $nsr1 nft -f - <<EOF table ip nat { chain prerouting { type nat hook prerouting priority 0; policy accept; @@ -319,37 +385,110 @@ table ip nat { } EOF -test_tcp_forwarding_nat ns1 ns2 - -if [ $? -eq 0 ] ;then - echo "PASS: flow offloaded for ns1/ns2 with NAT" -else +if ! test_tcp_forwarding_nat $ns1 $ns2 0 ""; then echo "FAIL: flow offload for ns1/ns2 with NAT" 1>&2 - ip netns exec nsr1 nft list ruleset + ip netns exec $nsr1 nft list ruleset ret=1 fi # Third test: -# Same as second test, but with PMTU discovery enabled. -handle=$(ip netns exec nsr1 nft -a list table inet filter | grep something-to-grep-for | cut -d \# -f 2) +# Same as second test, but with PMTU discovery enabled. This +# means that we expect the fastpath to handle packets as soon +# as the endpoints adjust the packet size. +ip netns exec $ns1 sysctl net.ipv4.ip_no_pmtu_disc=0 > /dev/null +ip netns exec $ns2 sysctl net.ipv4.ip_no_pmtu_disc=0 > /dev/null + +# reset counters. +# With pmtu in-place we'll also check that nft counters +# are lower than file size and packets were forwarded via flowtable layer. +# For earlier tests (large mtus), packets cannot be handled via flowtable +# (except pure acks and other small packets). +ip netns exec $nsr1 nft reset counters table inet filter >/dev/null + +if ! test_tcp_forwarding_nat $ns1 $ns2 1 ""; then + echo "FAIL: flow offload for ns1/ns2 with NAT and pmtu discovery" 1>&2 + ip netns exec $nsr1 nft list ruleset +fi -ip netns exec nsr1 nft delete rule inet filter forward $handle -if [ $? -ne 0 ] ;then - echo "FAIL: Could not delete large-packet accept rule" - exit 1 +# Another test: +# Add bridge interface br0 to Router1, with NAT enabled. +ip -net $nsr1 link add name br0 type bridge +ip -net $nsr1 addr flush dev veth0 +ip -net $nsr1 link set up dev veth0 +ip -net $nsr1 link set veth0 master br0 +ip -net $nsr1 addr add 10.0.1.1/24 dev br0 +ip -net $nsr1 addr add dead:1::1/64 dev br0 +ip -net $nsr1 link set up dev br0 + +ip netns exec $nsr1 sysctl net.ipv4.conf.br0.forwarding=1 > /dev/null + +# br0 with NAT enabled. +ip netns exec $nsr1 nft -f - <<EOF +flush table ip nat +table ip nat { + chain prerouting { + type nat hook prerouting priority 0; policy accept; + meta iif "br0" ip daddr 10.6.6.6 tcp dport 1666 counter dnat ip to 10.0.2.99:12345 + } + + chain postrouting { + type nat hook postrouting priority 0; policy accept; + meta oifname "veth1" counter masquerade + } +} +EOF + +if ! test_tcp_forwarding_nat $ns1 $ns2 1 "on bridge"; then + echo "FAIL: flow offload for ns1/ns2 with bridge NAT" 1>&2 + ip netns exec $nsr1 nft list ruleset + ret=1 fi -ip netns exec ns1 sysctl net.ipv4.ip_no_pmtu_disc=0 > /dev/null -ip netns exec ns2 sysctl net.ipv4.ip_no_pmtu_disc=0 > /dev/null -test_tcp_forwarding_nat ns1 ns2 -if [ $? -eq 0 ] ;then - echo "PASS: flow offloaded for ns1/ns2 with NAT and pmtu discovery" -else - echo "FAIL: flow offload for ns1/ns2 with NAT and pmtu discovery" 1>&2 - ip netns exec nsr1 nft list ruleset +# Another test: +# Add bridge interface br0 to Router1, with NAT and VLAN. +ip -net $nsr1 link set veth0 nomaster +ip -net $nsr1 link set down dev veth0 +ip -net $nsr1 link add link veth0 name veth0.10 type vlan id 10 +ip -net $nsr1 link set up dev veth0 +ip -net $nsr1 link set up dev veth0.10 +ip -net $nsr1 link set veth0.10 master br0 + +ip -net $ns1 addr flush dev eth0 +ip -net $ns1 link add link eth0 name eth0.10 type vlan id 10 +ip -net $ns1 link set eth0 up +ip -net $ns1 link set eth0.10 up +ip -net $ns1 addr add 10.0.1.99/24 dev eth0.10 +ip -net $ns1 route add default via 10.0.1.1 +ip -net $ns1 addr add dead:1::99/64 dev eth0.10 + +if ! test_tcp_forwarding_nat $ns1 $ns2 1 "bridge and VLAN"; then + echo "FAIL: flow offload for ns1/ns2 with bridge NAT and VLAN" 1>&2 + ip netns exec $nsr1 nft list ruleset + ret=1 fi +# restore test topology (remove bridge and VLAN) +ip -net $nsr1 link set veth0 nomaster +ip -net $nsr1 link set veth0 down +ip -net $nsr1 link set veth0.10 down +ip -net $nsr1 link delete veth0.10 type vlan +ip -net $nsr1 link delete br0 type bridge +ip -net $ns1 addr flush dev eth0.10 +ip -net $ns1 link set eth0.10 down +ip -net $ns1 link set eth0 down +ip -net $ns1 link delete eth0.10 type vlan + +# restore address in ns1 and nsr1 +ip -net $ns1 link set eth0 up +ip -net $ns1 addr add 10.0.1.99/24 dev eth0 +ip -net $ns1 route add default via 10.0.1.1 +ip -net $ns1 addr add dead:1::99/64 dev eth0 +ip -net $ns1 route add default via dead:1::1 +ip -net $nsr1 addr add 10.0.1.1/24 dev veth0 +ip -net $nsr1 addr add dead:1::1/64 dev veth0 +ip -net $nsr1 link set up dev veth0 + KEY_SHA="0x"$(ps -xaf | sha1sum | cut -d " " -f 1) KEY_AES="0x"$(ps -xaf | md5sum | cut -d " " -f 1) SPI1=$RANDOM @@ -378,24 +517,23 @@ do_esp() { } -do_esp nsr1 192.168.10.1 192.168.10.2 10.0.1.0/24 10.0.2.0/24 $SPI1 $SPI2 +do_esp $nsr1 192.168.10.1 192.168.10.2 10.0.1.0/24 10.0.2.0/24 $SPI1 $SPI2 -do_esp nsr2 192.168.10.2 192.168.10.1 10.0.2.0/24 10.0.1.0/24 $SPI2 $SPI1 +do_esp $nsr2 192.168.10.2 192.168.10.1 10.0.2.0/24 10.0.1.0/24 $SPI2 $SPI1 -ip netns exec nsr1 nft delete table ip nat +ip netns exec $nsr1 nft delete table ip nat # restore default routes -ip -net ns2 route del 192.168.10.1 via 10.0.2.1 -ip -net ns2 route add default via 10.0.2.1 -ip -net ns2 route add default via dead:2::1 +ip -net $ns2 route del 192.168.10.1 via 10.0.2.1 +ip -net $ns2 route add default via 10.0.2.1 +ip -net $ns2 route add default via dead:2::1 -test_tcp_forwarding ns1 ns2 -if [ $? -eq 0 ] ;then - echo "PASS: ipsec tunnel mode for ns1/ns2" +if test_tcp_forwarding $ns1 $ns2; then + check_counters "ipsec tunnel mode for ns1/ns2" else echo "FAIL: ipsec tunnel mode for ns1/ns2" - ip netns exec nsr1 nft list ruleset 1>&2 - ip netns exec nsr1 cat /proc/net/xfrm_stat 1>&2 + ip netns exec $nsr1 nft list ruleset 1>&2 + ip netns exec $nsr1 cat /proc/net/xfrm_stat 1>&2 fi exit $ret diff --git a/tools/testing/selftests/netfilter/nft_meta.sh b/tools/testing/selftests/netfilter/nft_meta.sh new file mode 100755 index 000000000000..f33154c04d34 --- /dev/null +++ b/tools/testing/selftests/netfilter/nft_meta.sh @@ -0,0 +1,142 @@ +#!/bin/bash + +# check iif/iifname/oifgroup/iiftype match. + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +sfx=$(mktemp -u "XXXXXXXX") +ns0="ns0-$sfx" + +if ! nft --version > /dev/null 2>&1; then + echo "SKIP: Could not run test without nft tool" + exit $ksft_skip +fi + +cleanup() +{ + ip netns del "$ns0" +} + +ip netns add "$ns0" +ip -net "$ns0" link set lo up +ip -net "$ns0" addr add 127.0.0.1 dev lo + +trap cleanup EXIT + +currentyear=$(date +%Y) +lastyear=$((currentyear-1)) +ip netns exec "$ns0" nft -f /dev/stdin <<EOF +table inet filter { + counter iifcount {} + counter iifnamecount {} + counter iifgroupcount {} + counter iiftypecount {} + counter infproto4count {} + counter il4protocounter {} + counter imarkcounter {} + counter icpu0counter {} + counter ilastyearcounter {} + counter icurrentyearcounter {} + + counter oifcount {} + counter oifnamecount {} + counter oifgroupcount {} + counter oiftypecount {} + counter onfproto4count {} + counter ol4protocounter {} + counter oskuidcounter {} + counter oskgidcounter {} + counter omarkcounter {} + + chain input { + type filter hook input priority 0; policy accept; + + meta iif lo counter name "iifcount" + meta iifname "lo" counter name "iifnamecount" + meta iifgroup "default" counter name "iifgroupcount" + meta iiftype "loopback" counter name "iiftypecount" + meta nfproto ipv4 counter name "infproto4count" + meta l4proto icmp counter name "il4protocounter" + meta mark 42 counter name "imarkcounter" + meta cpu 0 counter name "icpu0counter" + meta time "$lastyear-01-01" - "$lastyear-12-31" counter name ilastyearcounter + meta time "$currentyear-01-01" - "$currentyear-12-31" counter name icurrentyearcounter + } + + chain output { + type filter hook output priority 0; policy accept; + meta oif lo counter name "oifcount" counter + meta oifname "lo" counter name "oifnamecount" + meta oifgroup "default" counter name "oifgroupcount" + meta oiftype "loopback" counter name "oiftypecount" + meta nfproto ipv4 counter name "onfproto4count" + meta l4proto icmp counter name "ol4protocounter" + meta skuid 0 counter name "oskuidcounter" + meta skgid 0 counter name "oskgidcounter" + meta mark 42 counter name "omarkcounter" + } +} +EOF + +if [ $? -ne 0 ]; then + echo "SKIP: Could not add test ruleset" + exit $ksft_skip +fi + +ret=0 + +check_one_counter() +{ + local cname="$1" + local want="packets $2" + local verbose="$3" + + if ! ip netns exec "$ns0" nft list counter inet filter $cname | grep -q "$want"; then + echo "FAIL: $cname, want \"$want\", got" + ret=1 + ip netns exec "$ns0" nft list counter inet filter $cname + fi +} + +check_lo_counters() +{ + local want="$1" + local verbose="$2" + local counter + + for counter in iifcount iifnamecount iifgroupcount iiftypecount infproto4count \ + oifcount oifnamecount oifgroupcount oiftypecount onfproto4count \ + il4protocounter icurrentyearcounter ol4protocounter \ + ; do + check_one_counter "$counter" "$want" "$verbose" + done +} + +check_lo_counters "0" false +ip netns exec "$ns0" ping -q -c 1 127.0.0.1 -m 42 > /dev/null + +check_lo_counters "2" true + +check_one_counter oskuidcounter "1" true +check_one_counter oskgidcounter "1" true +check_one_counter imarkcounter "1" true +check_one_counter omarkcounter "1" true +check_one_counter ilastyearcounter "0" true + +if [ $ret -eq 0 ];then + echo "OK: nftables meta iif/oif counters at expected values" +else + exit $ret +fi + +#First CPU execution and counter +taskset -p 01 $$ > /dev/null +ip netns exec "$ns0" nft reset counters > /dev/null +ip netns exec "$ns0" ping -q -c 1 127.0.0.1 > /dev/null +check_one_counter icpu0counter "2" true + +if [ $ret -eq 0 ];then + echo "OK: nftables meta cpu counter at expected values" +fi + +exit $ret diff --git a/tools/testing/selftests/netfilter/nft_nat.sh b/tools/testing/selftests/netfilter/nft_nat.sh index d7e07f4c3d7f..924ecb3f1f73 100755 --- a/tools/testing/selftests/netfilter/nft_nat.sh +++ b/tools/testing/selftests/netfilter/nft_nat.sh @@ -374,6 +374,45 @@ EOF return $lret } +test_local_dnat_portonly() +{ + local family=$1 + local daddr=$2 + local lret=0 + local sr_s + local sr_r + +ip netns exec "$ns0" nft -f /dev/stdin <<EOF +table $family nat { + chain output { + type nat hook output priority 0; policy accept; + meta l4proto tcp dnat to :2000 + + } +} +EOF + if [ $? -ne 0 ]; then + if [ $family = "inet" ];then + echo "SKIP: inet port test" + test_inet_nat=false + return + fi + echo "SKIP: Could not add $family dnat hook" + return + fi + + echo SERVER-$family | ip netns exec "$ns1" timeout 5 socat -u STDIN TCP-LISTEN:2000 & + sc_s=$! + + result=$(ip netns exec "$ns0" timeout 1 socat TCP:$daddr:2000 STDOUT) + + if [ "$result" = "SERVER-inet" ];then + echo "PASS: inet port rewrite without l3 address" + else + echo "ERROR: inet port rewrite" + ret=1 + fi +} test_masquerade6() { @@ -741,6 +780,300 @@ EOF return $lret } +# test port shadowing. +# create two listening services, one on router (ns0), one +# on client (ns2), which is masqueraded from ns1 point of view. +# ns2 sends udp packet coming from service port to ns1, on a highport. +# Later, if n1 uses same highport to connect to ns0:service, packet +# might be port-forwarded to ns2 instead. + +# second argument tells if we expect the 'fake-entry' to take effect +# (CLIENT) or not (ROUTER). +test_port_shadow() +{ + local test=$1 + local expect=$2 + local daddrc="10.0.1.99" + local daddrs="10.0.1.1" + local result="" + local logmsg="" + + # make shadow entry, from client (ns2), going to (ns1), port 41404, sport 1405. + echo "fake-entry" | ip netns exec "$ns2" timeout 1 socat -u STDIN UDP:"$daddrc":41404,sourceport=1405 + + echo ROUTER | ip netns exec "$ns0" timeout 5 socat -u STDIN UDP4-LISTEN:1405 & + sc_r=$! + + echo CLIENT | ip netns exec "$ns2" timeout 5 socat -u STDIN UDP4-LISTEN:1405,reuseport & + sc_c=$! + + sleep 0.3 + + # ns1 tries to connect to ns0:1405. With default settings this should connect + # to client, it matches the conntrack entry created above. + + result=$(echo "data" | ip netns exec "$ns1" timeout 1 socat - UDP:"$daddrs":1405,sourceport=41404) + + if [ "$result" = "$expect" ] ;then + echo "PASS: portshadow test $test: got reply from ${expect}${logmsg}" + else + echo "ERROR: portshadow test $test: got reply from \"$result\", not $expect as intended" + ret=1 + fi + + kill $sc_r $sc_c 2>/dev/null + + # flush udp entries for next test round, if any + ip netns exec "$ns0" conntrack -F >/dev/null 2>&1 +} + +# This prevents port shadow of router service via packet filter, +# packets claiming to originate from service port from internal +# network are dropped. +test_port_shadow_filter() +{ + local family=$1 + +ip netns exec "$ns0" nft -f /dev/stdin <<EOF +table $family filter { + chain forward { + type filter hook forward priority 0; policy accept; + meta iif veth1 udp sport 1405 drop + } +} +EOF + test_port_shadow "port-filter" "ROUTER" + + ip netns exec "$ns0" nft delete table $family filter +} + +# This prevents port shadow of router service via notrack. +test_port_shadow_notrack() +{ + local family=$1 + +ip netns exec "$ns0" nft -f /dev/stdin <<EOF +table $family raw { + chain prerouting { + type filter hook prerouting priority -300; policy accept; + meta iif veth0 udp dport 1405 notrack + } + chain output { + type filter hook output priority -300; policy accept; + meta oif veth0 udp sport 1405 notrack + } +} +EOF + test_port_shadow "port-notrack" "ROUTER" + + ip netns exec "$ns0" nft delete table $family raw +} + +# This prevents port shadow of router service via sport remap. +test_port_shadow_pat() +{ + local family=$1 + +ip netns exec "$ns0" nft -f /dev/stdin <<EOF +table $family pat { + chain postrouting { + type nat hook postrouting priority -1; policy accept; + meta iif veth1 udp sport <= 1405 masquerade to : 1406-65535 random + } +} +EOF + test_port_shadow "pat" "ROUTER" + + ip netns exec "$ns0" nft delete table $family pat +} + +test_port_shadowing() +{ + local family="ip" + + conntrack -h >/dev/null 2>&1 + if [ $? -ne 0 ];then + echo "SKIP: Could not run nat port shadowing test without conntrack tool" + return + fi + + socat -h > /dev/null 2>&1 + if [ $? -ne 0 ];then + echo "SKIP: Could not run nat port shadowing test without socat tool" + return + fi + + ip netns exec "$ns0" sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null + ip netns exec "$ns0" sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null + + ip netns exec "$ns0" nft -f /dev/stdin <<EOF +table $family nat { + chain postrouting { + type nat hook postrouting priority 0; policy accept; + meta oif veth0 masquerade + } +} +EOF + if [ $? -ne 0 ]; then + echo "SKIP: Could not add add $family masquerade hook" + return $ksft_skip + fi + + # test default behaviour. Packet from ns1 to ns0 is redirected to ns2. + test_port_shadow "default" "CLIENT" + + # test packet filter based mitigation: prevent forwarding of + # packets claiming to come from the service port. + test_port_shadow_filter "$family" + + # test conntrack based mitigation: connections going or coming + # from router:service bypass connection tracking. + test_port_shadow_notrack "$family" + + # test nat based mitigation: fowarded packets coming from service port + # are masqueraded with random highport. + test_port_shadow_pat "$family" + + ip netns exec "$ns0" nft delete table $family nat +} + +test_stateless_nat_ip() +{ + local lret=0 + + ip netns exec "$ns0" sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null + ip netns exec "$ns0" sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null + + ip netns exec "$ns2" ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1 + if [ $? -ne 0 ] ; then + echo "ERROR: cannot ping $ns1 from $ns2 before loading stateless rules" + return 1 + fi + +ip netns exec "$ns0" nft -f /dev/stdin <<EOF +table ip stateless { + map xlate_in { + typeof meta iifname . ip saddr . ip daddr : ip daddr + elements = { + "veth1" . 10.0.2.99 . 10.0.1.99 : 10.0.2.2, + } + } + map xlate_out { + typeof meta iifname . ip saddr . ip daddr : ip daddr + elements = { + "veth0" . 10.0.1.99 . 10.0.2.2 : 10.0.2.99 + } + } + + chain prerouting { + type filter hook prerouting priority -400; policy accept; + ip saddr set meta iifname . ip saddr . ip daddr map @xlate_in + ip daddr set meta iifname . ip saddr . ip daddr map @xlate_out + } +} +EOF + if [ $? -ne 0 ]; then + echo "SKIP: Could not add ip statless rules" + return $ksft_skip + fi + + reset_counters + + ip netns exec "$ns2" ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1 + if [ $? -ne 0 ] ; then + echo "ERROR: cannot ping $ns1 from $ns2 with stateless rules" + lret=1 + fi + + # ns1 should have seen packets from .2.2, due to stateless rewrite. + expect="packets 1 bytes 84" + cnt=$(ip netns exec "$ns1" nft list counter inet filter ns0insl | grep -q "$expect") + if [ $? -ne 0 ]; then + bad_counter "$ns1" ns0insl "$expect" "test_stateless 1" + lret=1 + fi + + for dir in "in" "out" ; do + cnt=$(ip netns exec "$ns2" nft list counter inet filter ns1${dir} | grep -q "$expect") + if [ $? -ne 0 ]; then + bad_counter "$ns2" ns1$dir "$expect" "test_stateless 2" + lret=1 + fi + done + + # ns1 should not have seen packets from ns2, due to masquerade + expect="packets 0 bytes 0" + for dir in "in" "out" ; do + cnt=$(ip netns exec "$ns1" nft list counter inet filter ns2${dir} | grep -q "$expect") + if [ $? -ne 0 ]; then + bad_counter "$ns1" ns0$dir "$expect" "test_stateless 3" + lret=1 + fi + + cnt=$(ip netns exec "$ns0" nft list counter inet filter ns1${dir} | grep -q "$expect") + if [ $? -ne 0 ]; then + bad_counter "$ns0" ns1$dir "$expect" "test_stateless 4" + lret=1 + fi + done + + reset_counters + + socat -h > /dev/null 2>&1 + if [ $? -ne 0 ];then + echo "SKIP: Could not run stateless nat frag test without socat tool" + if [ $lret -eq 0 ]; then + return $ksft_skip + fi + + ip netns exec "$ns0" nft delete table ip stateless + return $lret + fi + + local tmpfile=$(mktemp) + dd if=/dev/urandom of=$tmpfile bs=4096 count=1 2>/dev/null + + local outfile=$(mktemp) + ip netns exec "$ns1" timeout 3 socat -u UDP4-RECV:4233 OPEN:$outfile < /dev/null & + sc_r=$! + + sleep 1 + # re-do with large ping -> ip fragmentation + ip netns exec "$ns2" timeout 3 socat - UDP4-SENDTO:"10.0.1.99:4233" < "$tmpfile" > /dev/null + if [ $? -ne 0 ] ; then + echo "ERROR: failed to test udp $ns1 to $ns2 with stateless ip nat" 1>&2 + lret=1 + fi + + wait + + cmp "$tmpfile" "$outfile" + if [ $? -ne 0 ]; then + ls -l "$tmpfile" "$outfile" + echo "ERROR: in and output file mismatch when checking udp with stateless nat" 1>&2 + lret=1 + fi + + rm -f "$tmpfile" "$outfile" + + # ns1 should have seen packets from 2.2, due to stateless rewrite. + expect="packets 3 bytes 4164" + cnt=$(ip netns exec "$ns1" nft list counter inet filter ns0insl | grep -q "$expect") + if [ $? -ne 0 ]; then + bad_counter "$ns1" ns0insl "$expect" "test_stateless 5" + lret=1 + fi + + ip netns exec "$ns0" nft delete table ip stateless + if [ $? -ne 0 ]; then + echo "ERROR: Could not delete table ip stateless" 1>&2 + lret=1 + fi + + test $lret -eq 0 && echo "PASS: IP statless for $ns2" + + return $lret +} # ip netns exec "$ns0" ping -c 1 -q 10.0.$i.99 for i in 0 1 2; do @@ -808,6 +1141,19 @@ table inet filter { EOF done +# special case for stateless nat check, counter needs to +# be done before (input) ip defragmentation +ip netns exec ns1-$sfx nft -f /dev/stdin <<EOF +table inet filter { + counter ns0insl {} + + chain pre { + type filter hook prerouting priority -400; policy accept; + ip saddr 10.0.2.2 counter name "ns0insl" + } +} +EOF + sleep 3 # test basic connectivity for i in 1 2; do @@ -841,6 +1187,10 @@ fi reset_counters test_local_dnat ip test_local_dnat6 ip6 + +reset_counters +test_local_dnat_portonly inet 10.0.1.99 + reset_counters $test_inet_nat && test_local_dnat inet $test_inet_nat && test_local_dnat6 inet @@ -861,6 +1211,9 @@ reset_counters $test_inet_nat && test_redirect inet $test_inet_nat && test_redirect6 inet +test_port_shadowing +test_stateless_nat_ip + if [ $ret -ne 0 ];then echo -n "FAIL: " nft --version diff --git a/tools/testing/selftests/netfilter/nft_nat_zones.sh b/tools/testing/selftests/netfilter/nft_nat_zones.sh new file mode 100755 index 000000000000..b9ab37380f33 --- /dev/null +++ b/tools/testing/selftests/netfilter/nft_nat_zones.sh @@ -0,0 +1,309 @@ +#!/bin/bash +# +# Test connection tracking zone and NAT source port reallocation support. +# + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +# Don't increase too much, 2000 clients should work +# just fine but script can then take several minutes with +# KASAN/debug builds. +maxclients=100 + +have_iperf=1 +ret=0 + +# client1---. +# veth1-. +# | +# NAT Gateway --veth0--> Server +# | | +# veth2-' | +# client2---' | +# .... | +# clientX----vethX---' + +# All clients share identical IP address. +# NAT Gateway uses policy routing and conntrack zones to isolate client +# namespaces. Each client connects to Server, each with colliding tuples: +# clientsaddr:10000 -> serveraddr:dport +# NAT Gateway is supposed to do port reallocation for each of the +# connections. + +sfx=$(mktemp -u "XXXXXXXX") +gw="ns-gw-$sfx" +cl1="ns-cl1-$sfx" +cl2="ns-cl2-$sfx" +srv="ns-srv-$sfx" + +v4gc1=$(sysctl -n net.ipv4.neigh.default.gc_thresh1 2>/dev/null) +v4gc2=$(sysctl -n net.ipv4.neigh.default.gc_thresh2 2>/dev/null) +v4gc3=$(sysctl -n net.ipv4.neigh.default.gc_thresh3 2>/dev/null) +v6gc1=$(sysctl -n net.ipv6.neigh.default.gc_thresh1 2>/dev/null) +v6gc2=$(sysctl -n net.ipv6.neigh.default.gc_thresh2 2>/dev/null) +v6gc3=$(sysctl -n net.ipv6.neigh.default.gc_thresh3 2>/dev/null) + +cleanup() +{ + ip netns del $gw + ip netns del $srv + for i in $(seq 1 $maxclients); do + ip netns del ns-cl$i-$sfx 2>/dev/null + done + + sysctl -q net.ipv4.neigh.default.gc_thresh1=$v4gc1 2>/dev/null + sysctl -q net.ipv4.neigh.default.gc_thresh2=$v4gc2 2>/dev/null + sysctl -q net.ipv4.neigh.default.gc_thresh3=$v4gc3 2>/dev/null + sysctl -q net.ipv6.neigh.default.gc_thresh1=$v6gc1 2>/dev/null + sysctl -q net.ipv6.neigh.default.gc_thresh2=$v6gc2 2>/dev/null + sysctl -q net.ipv6.neigh.default.gc_thresh3=$v6gc3 2>/dev/null +} + +nft --version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without nft tool" + exit $ksft_skip +fi + +ip -Version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +conntrack -V > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without conntrack tool" + exit $ksft_skip +fi + +iperf3 -v >/dev/null 2>&1 +if [ $? -ne 0 ];then + have_iperf=0 +fi + +ip netns add "$gw" +if [ $? -ne 0 ];then + echo "SKIP: Could not create net namespace $gw" + exit $ksft_skip +fi +ip -net "$gw" link set lo up + +trap cleanup EXIT + +ip netns add "$srv" +if [ $? -ne 0 ];then + echo "SKIP: Could not create server netns $srv" + exit $ksft_skip +fi + +ip link add veth0 netns "$gw" type veth peer name eth0 netns "$srv" +ip -net "$gw" link set veth0 up +ip -net "$srv" link set lo up +ip -net "$srv" link set eth0 up + +sysctl -q net.ipv6.neigh.default.gc_thresh1=512 2>/dev/null +sysctl -q net.ipv6.neigh.default.gc_thresh2=1024 2>/dev/null +sysctl -q net.ipv6.neigh.default.gc_thresh3=4096 2>/dev/null +sysctl -q net.ipv4.neigh.default.gc_thresh1=512 2>/dev/null +sysctl -q net.ipv4.neigh.default.gc_thresh2=1024 2>/dev/null +sysctl -q net.ipv4.neigh.default.gc_thresh3=4096 2>/dev/null + +for i in $(seq 1 $maxclients);do + cl="ns-cl$i-$sfx" + + ip netns add "$cl" + if [ $? -ne 0 ];then + echo "SKIP: Could not create client netns $cl" + exit $ksft_skip + fi + ip link add veth$i netns "$gw" type veth peer name eth0 netns "$cl" > /dev/null 2>&1 + if [ $? -ne 0 ];then + echo "SKIP: No virtual ethernet pair device support in kernel" + exit $ksft_skip + fi +done + +for i in $(seq 1 $maxclients);do + cl="ns-cl$i-$sfx" + echo netns exec "$cl" ip link set lo up + echo netns exec "$cl" ip link set eth0 up + echo netns exec "$cl" sysctl -q net.ipv4.tcp_syn_retries=2 + echo netns exec "$gw" ip link set veth$i up + echo netns exec "$gw" sysctl -q net.ipv4.conf.veth$i.arp_ignore=2 + echo netns exec "$gw" sysctl -q net.ipv4.conf.veth$i.rp_filter=0 + + # clients have same IP addresses. + echo netns exec "$cl" ip addr add 10.1.0.3/24 dev eth0 + echo netns exec "$cl" ip addr add dead:1::3/64 dev eth0 + echo netns exec "$cl" ip route add default via 10.1.0.2 dev eth0 + echo netns exec "$cl" ip route add default via dead:1::2 dev eth0 + + # NB: same addresses on client-facing interfaces. + echo netns exec "$gw" ip addr add 10.1.0.2/24 dev veth$i + echo netns exec "$gw" ip addr add dead:1::2/64 dev veth$i + + # gw: policy routing + echo netns exec "$gw" ip route add 10.1.0.0/24 dev veth$i table $((1000+i)) + echo netns exec "$gw" ip route add dead:1::0/64 dev veth$i table $((1000+i)) + echo netns exec "$gw" ip route add 10.3.0.0/24 dev veth0 table $((1000+i)) + echo netns exec "$gw" ip route add dead:3::0/64 dev veth0 table $((1000+i)) + echo netns exec "$gw" ip rule add fwmark $i lookup $((1000+i)) +done | ip -batch /dev/stdin + +ip -net "$gw" addr add 10.3.0.1/24 dev veth0 +ip -net "$gw" addr add dead:3::1/64 dev veth0 + +ip -net "$srv" addr add 10.3.0.99/24 dev eth0 +ip -net "$srv" addr add dead:3::99/64 dev eth0 + +ip netns exec $gw nft -f /dev/stdin<<EOF +table inet raw { + map iiftomark { + type ifname : mark + } + + map iiftozone { + typeof iifname : ct zone + } + + set inicmp { + flags dynamic + type ipv4_addr . ifname . ipv4_addr + } + set inflows { + flags dynamic + type ipv4_addr . inet_service . ifname . ipv4_addr . inet_service + } + + set inflows6 { + flags dynamic + type ipv6_addr . inet_service . ifname . ipv6_addr . inet_service + } + + chain prerouting { + type filter hook prerouting priority -64000; policy accept; + ct original zone set meta iifname map @iiftozone + meta mark set meta iifname map @iiftomark + + tcp flags & (syn|ack) == ack add @inflows { ip saddr . tcp sport . meta iifname . ip daddr . tcp dport counter } + add @inflows6 { ip6 saddr . tcp sport . meta iifname . ip6 daddr . tcp dport counter } + ip protocol icmp add @inicmp { ip saddr . meta iifname . ip daddr counter } + } + + chain nat_postrouting { + type nat hook postrouting priority 0; policy accept; + ct mark set meta mark meta oifname veth0 masquerade + } + + chain mangle_prerouting { + type filter hook prerouting priority -100; policy accept; + ct direction reply meta mark set ct mark + } +} +EOF + +( echo add element inet raw iiftomark \{ + for i in $(seq 1 $((maxclients-1))); do + echo \"veth$i\" : $i, + done + echo \"veth$maxclients\" : $maxclients \} + echo add element inet raw iiftozone \{ + for i in $(seq 1 $((maxclients-1))); do + echo \"veth$i\" : $i, + done + echo \"veth$maxclients\" : $maxclients \} +) | ip netns exec $gw nft -f /dev/stdin + +ip netns exec "$gw" sysctl -q net.ipv4.conf.all.forwarding=1 > /dev/null +ip netns exec "$gw" sysctl -q net.ipv6.conf.all.forwarding=1 > /dev/null +ip netns exec "$gw" sysctl -q net.ipv4.conf.all.rp_filter=0 >/dev/null + +# useful for debugging: allows to use 'ping' from clients to gateway. +ip netns exec "$gw" sysctl -q net.ipv4.fwmark_reflect=1 > /dev/null +ip netns exec "$gw" sysctl -q net.ipv6.fwmark_reflect=1 > /dev/null + +for i in $(seq 1 $maxclients); do + cl="ns-cl$i-$sfx" + ip netns exec $cl ping -i 0.5 -q -c 3 10.3.0.99 > /dev/null 2>&1 & + if [ $? -ne 0 ]; then + echo FAIL: Ping failure from $cl 1>&2 + ret=1 + break + fi +done + +wait + +for i in $(seq 1 $maxclients); do + ip netns exec $gw nft get element inet raw inicmp "{ 10.1.0.3 . \"veth$i\" . 10.3.0.99 }" | grep -q "{ 10.1.0.3 . \"veth$i\" . 10.3.0.99 counter packets 3 bytes 252 }" + if [ $? -ne 0 ];then + ret=1 + echo "FAIL: counter icmp mismatch for veth$i" 1>&2 + ip netns exec $gw nft get element inet raw inicmp "{ 10.1.0.3 . \"veth$i\" . 10.3.0.99 }" 1>&2 + break + fi +done + +ip netns exec $gw nft get element inet raw inicmp "{ 10.3.0.99 . \"veth0\" . 10.3.0.1 }" | grep -q "{ 10.3.0.99 . \"veth0\" . 10.3.0.1 counter packets $((3 * $maxclients)) bytes $((252 * $maxclients)) }" +if [ $? -ne 0 ];then + ret=1 + echo "FAIL: counter icmp mismatch for veth0: { 10.3.0.99 . \"veth0\" . 10.3.0.1 counter packets $((3 * $maxclients)) bytes $((252 * $maxclients)) }" + ip netns exec $gw nft get element inet raw inicmp "{ 10.3.99 . \"veth0\" . 10.3.0.1 }" 1>&2 +fi + +if [ $ret -eq 0 ]; then + echo "PASS: ping test from all $maxclients namespaces" +fi + +if [ $have_iperf -eq 0 ];then + echo "SKIP: iperf3 not installed" + if [ $ret -ne 0 ];then + exit $ret + fi + exit $ksft_skip +fi + +ip netns exec $srv iperf3 -s > /dev/null 2>&1 & +iperfpid=$! +sleep 1 + +for i in $(seq 1 $maxclients); do + if [ $ret -ne 0 ]; then + break + fi + cl="ns-cl$i-$sfx" + ip netns exec $cl iperf3 -c 10.3.0.99 --cport 10000 -n 1 > /dev/null + if [ $? -ne 0 ]; then + echo FAIL: Failure to connect for $cl 1>&2 + ip netns exec $gw conntrack -S 1>&2 + ret=1 + fi +done +if [ $ret -eq 0 ];then + echo "PASS: iperf3 connections for all $maxclients net namespaces" +fi + +kill $iperfpid +wait + +for i in $(seq 1 $maxclients); do + ip netns exec $gw nft get element inet raw inflows "{ 10.1.0.3 . 10000 . \"veth$i\" . 10.3.0.99 . 5201 }" > /dev/null + if [ $? -ne 0 ];then + ret=1 + echo "FAIL: can't find expected tcp entry for veth$i" 1>&2 + break + fi +done +if [ $ret -eq 0 ];then + echo "PASS: Found client connection for all $maxclients net namespaces" +fi + +ip netns exec $gw nft get element inet raw inflows "{ 10.3.0.99 . 5201 . \"veth0\" . 10.3.0.1 . 10000 }" > /dev/null +if [ $? -ne 0 ];then + ret=1 + echo "FAIL: cannot find return entry on veth0" 1>&2 +fi + +exit $ret diff --git a/tools/testing/selftests/netfilter/nft_queue.sh b/tools/testing/selftests/netfilter/nft_queue.sh new file mode 100755 index 000000000000..e12729753351 --- /dev/null +++ b/tools/testing/selftests/netfilter/nft_queue.sh @@ -0,0 +1,449 @@ +#!/bin/bash +# +# This tests nf_queue: +# 1. can process packets from all hooks +# 2. support running nfqueue from more than one base chain +# +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +ret=0 + +sfx=$(mktemp -u "XXXXXXXX") +ns1="ns1-$sfx" +ns2="ns2-$sfx" +nsrouter="nsrouter-$sfx" +timeout=4 + +cleanup() +{ + ip netns pids ${ns1} | xargs kill 2>/dev/null + ip netns pids ${ns2} | xargs kill 2>/dev/null + ip netns pids ${nsrouter} | xargs kill 2>/dev/null + + ip netns del ${ns1} + ip netns del ${ns2} + ip netns del ${nsrouter} + rm -f "$TMPFILE0" + rm -f "$TMPFILE1" + rm -f "$TMPFILE2" "$TMPFILE3" +} + +nft --version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without nft tool" + exit $ksft_skip +fi + +ip -Version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +ip netns add ${nsrouter} +if [ $? -ne 0 ];then + echo "SKIP: Could not create net namespace" + exit $ksft_skip +fi + +TMPFILE0=$(mktemp) +TMPFILE1=$(mktemp) +TMPFILE2=$(mktemp) +TMPFILE3=$(mktemp) +trap cleanup EXIT + +ip netns add ${ns1} +ip netns add ${ns2} + +ip link add veth0 netns ${nsrouter} type veth peer name eth0 netns ${ns1} > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: No virtual ethernet pair device support in kernel" + exit $ksft_skip +fi +ip link add veth1 netns ${nsrouter} type veth peer name eth0 netns ${ns2} + +ip -net ${nsrouter} link set lo up +ip -net ${nsrouter} link set veth0 up +ip -net ${nsrouter} addr add 10.0.1.1/24 dev veth0 +ip -net ${nsrouter} addr add dead:1::1/64 dev veth0 + +ip -net ${nsrouter} link set veth1 up +ip -net ${nsrouter} addr add 10.0.2.1/24 dev veth1 +ip -net ${nsrouter} addr add dead:2::1/64 dev veth1 + +ip -net ${ns1} link set lo up +ip -net ${ns1} link set eth0 up + +ip -net ${ns2} link set lo up +ip -net ${ns2} link set eth0 up + +ip -net ${ns1} addr add 10.0.1.99/24 dev eth0 +ip -net ${ns1} addr add dead:1::99/64 dev eth0 +ip -net ${ns1} route add default via 10.0.1.1 +ip -net ${ns1} route add default via dead:1::1 + +ip -net ${ns2} addr add 10.0.2.99/24 dev eth0 +ip -net ${ns2} addr add dead:2::99/64 dev eth0 +ip -net ${ns2} route add default via 10.0.2.1 +ip -net ${ns2} route add default via dead:2::1 + +load_ruleset() { + local name=$1 + local prio=$2 + +ip netns exec ${nsrouter} nft -f /dev/stdin <<EOF +table inet $name { + chain nfq { + ip protocol icmp queue bypass + icmpv6 type { "echo-request", "echo-reply" } queue num 1 bypass + } + chain pre { + type filter hook prerouting priority $prio; policy accept; + jump nfq + } + chain input { + type filter hook input priority $prio; policy accept; + jump nfq + } + chain forward { + type filter hook forward priority $prio; policy accept; + tcp dport 12345 queue num 2 + jump nfq + } + chain output { + type filter hook output priority $prio; policy accept; + tcp dport 12345 queue num 3 + tcp sport 23456 queue num 3 + jump nfq + } + chain post { + type filter hook postrouting priority $prio; policy accept; + jump nfq + } +} +EOF +} + +load_counter_ruleset() { + local prio=$1 + +ip netns exec ${nsrouter} nft -f /dev/stdin <<EOF +table inet countrules { + chain pre { + type filter hook prerouting priority $prio; policy accept; + counter + } + chain input { + type filter hook input priority $prio; policy accept; + counter + } + chain forward { + type filter hook forward priority $prio; policy accept; + counter + } + chain output { + type filter hook output priority $prio; policy accept; + counter + } + chain post { + type filter hook postrouting priority $prio; policy accept; + counter + } +} +EOF +} + +test_ping() { + ip netns exec ${ns1} ping -c 1 -q 10.0.2.99 > /dev/null + if [ $? -ne 0 ];then + return 1 + fi + + ip netns exec ${ns1} ping -c 1 -q dead:2::99 > /dev/null + if [ $? -ne 0 ];then + return 1 + fi + + return 0 +} + +test_ping_router() { + ip netns exec ${ns1} ping -c 1 -q 10.0.2.1 > /dev/null + if [ $? -ne 0 ];then + return 1 + fi + + ip netns exec ${ns1} ping -c 1 -q dead:2::1 > /dev/null + if [ $? -ne 0 ];then + return 1 + fi + + return 0 +} + +test_queue_blackhole() { + local proto=$1 + +ip netns exec ${nsrouter} nft -f /dev/stdin <<EOF +table $proto blackh { + chain forward { + type filter hook forward priority 0; policy accept; + queue num 600 + } +} +EOF + if [ $proto = "ip" ] ;then + ip netns exec ${ns1} ping -W 2 -c 1 -q 10.0.2.99 > /dev/null + lret=$? + elif [ $proto = "ip6" ]; then + ip netns exec ${ns1} ping -W 2 -c 1 -q dead:2::99 > /dev/null + lret=$? + else + lret=111 + fi + + # queue without bypass keyword should drop traffic if no listener exists. + if [ $lret -eq 0 ];then + echo "FAIL: $proto expected failure, got $lret" 1>&2 + exit 1 + fi + + ip netns exec ${nsrouter} nft delete table $proto blackh + if [ $? -ne 0 ] ;then + echo "FAIL: $proto: Could not delete blackh table" + exit 1 + fi + + echo "PASS: $proto: statement with no listener results in packet drop" +} + +test_queue() +{ + local expected=$1 + local last="" + + # spawn nf-queue listeners + ip netns exec ${nsrouter} ./nf-queue -c -q 0 -t $timeout > "$TMPFILE0" & + ip netns exec ${nsrouter} ./nf-queue -c -q 1 -t $timeout > "$TMPFILE1" & + sleep 1 + test_ping + ret=$? + if [ $ret -ne 0 ];then + echo "FAIL: netns routing/connectivity with active listener on queue $queue: $ret" 1>&2 + exit $ret + fi + + test_ping_router + ret=$? + if [ $ret -ne 0 ];then + echo "FAIL: netns router unreachable listener on queue $queue: $ret" 1>&2 + exit $ret + fi + + wait + ret=$? + + for file in $TMPFILE0 $TMPFILE1; do + last=$(tail -n1 "$file") + if [ x"$last" != x"$expected packets total" ]; then + echo "FAIL: Expected $expected packets total, but got $last" 1>&2 + cat "$file" 1>&2 + + ip netns exec ${nsrouter} nft list ruleset + exit 1 + fi + done + + echo "PASS: Expected and received $last" +} + +test_tcp_forward() +{ + ip netns exec ${nsrouter} ./nf-queue -q 2 -t $timeout & + local nfqpid=$! + + tmpfile=$(mktemp) || exit 1 + dd conv=sparse status=none if=/dev/zero bs=1M count=200 of=$tmpfile + ip netns exec ${ns2} nc -w 5 -l -p 12345 <"$tmpfile" >/dev/null & + local rpid=$! + + sleep 1 + ip netns exec ${ns1} nc -w 5 10.0.2.99 12345 <"$tmpfile" >/dev/null & + + rm -f "$tmpfile" + + wait $rpid + wait $lpid + [ $? -eq 0 ] && echo "PASS: tcp and nfqueue in forward chain" +} + +test_tcp_localhost() +{ + tmpfile=$(mktemp) || exit 1 + + dd conv=sparse status=none if=/dev/zero bs=1M count=200 of=$tmpfile + ip netns exec ${nsrouter} nc -w 5 -l -p 12345 <"$tmpfile" >/dev/null & + local rpid=$! + + ip netns exec ${nsrouter} ./nf-queue -q 3 -t $timeout & + local nfqpid=$! + + sleep 1 + ip netns exec ${nsrouter} nc -w 5 127.0.0.1 12345 <"$tmpfile" > /dev/null + rm -f "$tmpfile" + + wait $rpid + [ $? -eq 0 ] && echo "PASS: tcp via loopback" + wait 2>/dev/null +} + +test_tcp_localhost_connectclose() +{ + tmpfile=$(mktemp) || exit 1 + + ip netns exec ${nsrouter} ./connect_close -p 23456 -t $timeout & + + ip netns exec ${nsrouter} ./nf-queue -q 3 -t $timeout & + local nfqpid=$! + + sleep 1 + rm -f "$tmpfile" + + wait $rpid + [ $? -eq 0 ] && echo "PASS: tcp via loopback with connect/close" + wait 2>/dev/null +} + +test_tcp_localhost_requeue() +{ +ip netns exec ${nsrouter} nft -f /dev/stdin <<EOF +flush ruleset +table inet filter { + chain output { + type filter hook output priority 0; policy accept; + tcp dport 12345 limit rate 1/second burst 1 packets counter queue num 0 + } + chain post { + type filter hook postrouting priority 0; policy accept; + tcp dport 12345 limit rate 1/second burst 1 packets counter queue num 0 + } +} +EOF + tmpfile=$(mktemp) || exit 1 + dd conv=sparse status=none if=/dev/zero bs=1M count=200 of=$tmpfile + ip netns exec ${nsrouter} nc -w 5 -l -p 12345 <"$tmpfile" >/dev/null & + local rpid=$! + + ip netns exec ${nsrouter} ./nf-queue -c -q 1 -t $timeout > "$TMPFILE2" & + + # nfqueue 1 will be called via output hook. But this time, + # re-queue the packet to nfqueue program on queue 2. + ip netns exec ${nsrouter} ./nf-queue -G -d 150 -c -q 0 -Q 1 -t $timeout > "$TMPFILE3" & + + sleep 1 + ip netns exec ${nsrouter} nc -w 5 127.0.0.1 12345 <"$tmpfile" > /dev/null + rm -f "$tmpfile" + + wait + + if ! diff -u "$TMPFILE2" "$TMPFILE3" ; then + echo "FAIL: lost packets during requeue?!" 1>&2 + return + fi + + echo "PASS: tcp via loopback and re-queueing" +} + +test_icmp_vrf() { + ip -net $ns1 link add tvrf type vrf table 9876 + if [ $? -ne 0 ];then + echo "SKIP: Could not add vrf device" + return + fi + + ip -net $ns1 li set eth0 master tvrf + ip -net $ns1 li set tvrf up + + ip -net $ns1 route add 10.0.2.0/24 via 10.0.1.1 dev eth0 table 9876 +ip netns exec ${ns1} nft -f /dev/stdin <<EOF +flush ruleset +table inet filter { + chain output { + type filter hook output priority 0; policy accept; + meta oifname "tvrf" icmp type echo-request counter queue num 1 + meta oifname "eth0" icmp type echo-request counter queue num 1 + } + chain post { + type filter hook postrouting priority 0; policy accept; + meta oifname "tvrf" icmp type echo-request counter queue num 1 + meta oifname "eth0" icmp type echo-request counter queue num 1 + } +} +EOF + ip netns exec ${ns1} ./nf-queue -q 1 -t $timeout & + local nfqpid=$! + + sleep 1 + ip netns exec ${ns1} ip vrf exec tvrf ping -c 1 10.0.2.99 > /dev/null + + for n in output post; do + for d in tvrf eth0; do + ip netns exec ${ns1} nft list chain inet filter $n | grep -q "oifname \"$d\" icmp type echo-request counter packets 1" + if [ $? -ne 0 ] ; then + echo "FAIL: chain $n: icmp packet counter mismatch for device $d" 1>&2 + ip netns exec ${ns1} nft list ruleset + ret=1 + return + fi + done + done + + wait $nfqpid + [ $? -eq 0 ] && echo "PASS: icmp+nfqueue via vrf" + wait 2>/dev/null +} + +ip netns exec ${nsrouter} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null +ip netns exec ${nsrouter} sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null +ip netns exec ${nsrouter} sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null + +load_ruleset "filter" 0 + +sleep 3 + +test_ping +ret=$? +if [ $ret -eq 0 ];then + # queue bypass works (rules were skipped, no listener) + echo "PASS: ${ns1} can reach ${ns2}" +else + echo "FAIL: ${ns1} cannot reach ${ns2}: $ret" 1>&2 + exit $ret +fi + +test_queue_blackhole ip +test_queue_blackhole ip6 + +# dummy ruleset to add base chains between the +# queueing rules. We don't want the second reinject +# to re-execute the old hooks. +load_counter_ruleset 10 + +# we are hooking all: prerouting/input/forward/output/postrouting. +# we ping ${ns2} from ${ns1} via ${nsrouter} using ipv4 and ipv6, so: +# 1x icmp prerouting,forward,postrouting -> 3 queue events (6 incl. reply). +# 1x icmp prerouting,input,output postrouting -> 4 queue events incl. reply. +# so we expect that userspace program receives 10 packets. +test_queue 10 + +# same. We queue to a second program as well. +load_ruleset "filter2" 20 +test_queue 20 + +test_tcp_forward +test_tcp_localhost +test_tcp_localhost_connectclose +test_tcp_localhost_requeue +test_icmp_vrf + +exit $ret diff --git a/tools/testing/selftests/netfilter/nft_synproxy.sh b/tools/testing/selftests/netfilter/nft_synproxy.sh new file mode 100755 index 000000000000..b62933b680d6 --- /dev/null +++ b/tools/testing/selftests/netfilter/nft_synproxy.sh @@ -0,0 +1,117 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +ret=0 + +rnd=$(mktemp -u XXXXXXXX) +nsr="nsr-$rnd" # synproxy machine +ns1="ns1-$rnd" # iperf client +ns2="ns2-$rnd" # iperf server + +checktool (){ + if ! $1 > /dev/null 2>&1; then + echo "SKIP: Could not $2" + exit $ksft_skip + fi +} + +checktool "nft --version" "run test without nft tool" +checktool "ip -Version" "run test without ip tool" +checktool "iperf3 --version" "run test without iperf3" +checktool "ip netns add $nsr" "create net namespace" + +modprobe -q nf_conntrack + +ip netns add $ns1 +ip netns add $ns2 + +cleanup() { + ip netns pids $ns1 | xargs kill 2>/dev/null + ip netns pids $ns2 | xargs kill 2>/dev/null + ip netns del $ns1 + ip netns del $ns2 + + ip netns del $nsr +} + +trap cleanup EXIT + +ip link add veth0 netns $nsr type veth peer name eth0 netns $ns1 +ip link add veth1 netns $nsr type veth peer name eth0 netns $ns2 + +for dev in lo veth0 veth1; do +ip -net $nsr link set $dev up +done + +ip -net $nsr addr add 10.0.1.1/24 dev veth0 +ip -net $nsr addr add 10.0.2.1/24 dev veth1 + +ip netns exec $nsr sysctl -q net.ipv4.conf.veth0.forwarding=1 +ip netns exec $nsr sysctl -q net.ipv4.conf.veth1.forwarding=1 +ip netns exec $nsr sysctl -q net.netfilter.nf_conntrack_tcp_loose=0 + +for n in $ns1 $ns2; do + ip -net $n link set lo up + ip -net $n link set eth0 up +done +ip -net $ns1 addr add 10.0.1.99/24 dev eth0 +ip -net $ns2 addr add 10.0.2.99/24 dev eth0 +ip -net $ns1 route add default via 10.0.1.1 +ip -net $ns2 route add default via 10.0.2.1 + +# test basic connectivity +if ! ip netns exec $ns1 ping -c 1 -q 10.0.2.99 > /dev/null; then + echo "ERROR: $ns1 cannot reach $ns2" 1>&2 + exit 1 +fi + +if ! ip netns exec $ns2 ping -c 1 -q 10.0.1.99 > /dev/null; then + echo "ERROR: $ns2 cannot reach $ns1" 1>&2 + exit 1 +fi + +ip netns exec $ns2 iperf3 -s > /dev/null 2>&1 & +# ip netns exec $nsr tcpdump -vvv -n -i veth1 tcp | head -n 10 & + +sleep 1 + +ip netns exec $nsr nft -f - <<EOF +table inet filter { + chain prerouting { + type filter hook prerouting priority -300; policy accept; + meta iif veth0 tcp flags syn counter notrack + } + + chain forward { + type filter hook forward priority 0; policy accept; + + ct state new,established counter accept + + meta iif veth0 meta l4proto tcp ct state untracked,invalid synproxy mss 1460 sack-perm timestamp + + ct state invalid counter drop + + # make ns2 unreachable w.o. tcp synproxy + tcp flags syn counter drop + } +} +EOF +if [ $? -ne 0 ]; then + echo "SKIP: Cannot add nft synproxy" + exit $ksft_skip +fi + +ip netns exec $ns1 timeout 5 iperf3 -c 10.0.2.99 -n $((1 * 1024 * 1024)) > /dev/null + +if [ $? -ne 0 ]; then + echo "FAIL: iperf3 returned an error" 1>&2 + ret=$? + ip netns exec $nsr nft list ruleset +else + echo "PASS: synproxy connection successful" +fi + +exit $ret diff --git a/tools/testing/selftests/netfilter/nft_trans_stress.sh b/tools/testing/selftests/netfilter/nft_trans_stress.sh index f1affd12c4b1..a7f62ad4f661 100755 --- a/tools/testing/selftests/netfilter/nft_trans_stress.sh +++ b/tools/testing/selftests/netfilter/nft_trans_stress.sh @@ -9,8 +9,27 @@ # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 -testns=testns1 +testns=testns-$(mktemp -u "XXXXXXXX") + tables="foo bar baz quux" +global_ret=0 +eret=0 +lret=0 + +check_result() +{ + local r=$1 + local OK="PASS" + + if [ $r -ne 0 ] ;then + OK="FAIL" + global_ret=$r + fi + + echo "$OK: nft $2 test returned $r" + + eret=0 +} nft --version > /dev/null 2>&1 if [ $? -ne 0 ];then @@ -59,16 +78,66 @@ done) sleep 1 +ip netns exec "$testns" nft -f "$tmp" for i in $(seq 1 10) ; do ip netns exec "$testns" nft -f "$tmp" & done for table in $tables;do - randsleep=$((RANDOM%10)) + randsleep=$((RANDOM%2)) sleep $randsleep - ip netns exec "$testns" nft delete table inet $table 2>/dev/null + ip netns exec "$testns" nft delete table inet $table + lret=$? + if [ $lret -ne 0 ]; then + eret=$lret + fi done -randsleep=$((RANDOM%10)) -sleep $randsleep +check_result $eret "add/delete" + +for i in $(seq 1 10) ; do + (echo "flush ruleset"; cat "$tmp") | ip netns exec "$testns" nft -f /dev/stdin + + lret=$? + if [ $lret -ne 0 ]; then + eret=$lret + fi +done + +check_result $eret "reload" + +for i in $(seq 1 10) ; do + (echo "flush ruleset"; cat "$tmp" + echo "insert rule inet foo INPUT meta nftrace set 1" + echo "insert rule inet foo OUTPUT meta nftrace set 1" + ) | ip netns exec "$testns" nft -f /dev/stdin + lret=$? + if [ $lret -ne 0 ]; then + eret=$lret + fi + + (echo "flush ruleset"; cat "$tmp" + ) | ip netns exec "$testns" nft -f /dev/stdin + + lret=$? + if [ $lret -ne 0 ]; then + eret=$lret + fi +done + +check_result $eret "add/delete with nftrace enabled" + +echo "insert rule inet foo INPUT meta nftrace set 1" >> $tmp +echo "insert rule inet foo OUTPUT meta nftrace set 1" >> $tmp + +for i in $(seq 1 10) ; do + (echo "flush ruleset"; cat "$tmp") | ip netns exec "$testns" nft -f /dev/stdin + + lret=$? + if [ $lret -ne 0 ]; then + eret=1 + fi +done + +check_result $lret "add/delete with nftrace enabled" pkill -9 ping @@ -76,3 +145,5 @@ wait rm -f "$tmp" ip netns del "$testns" + +exit $global_ret diff --git a/tools/testing/selftests/netfilter/nft_zones_many.sh b/tools/testing/selftests/netfilter/nft_zones_many.sh new file mode 100755 index 000000000000..5a8db0b48928 --- /dev/null +++ b/tools/testing/selftests/netfilter/nft_zones_many.sh @@ -0,0 +1,163 @@ +#!/bin/bash + +# Test insertion speed for packets with identical addresses/ports +# that are all placed in distinct conntrack zones. + +sfx=$(mktemp -u "XXXXXXXX") +ns="ns-$sfx" + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +zones=2000 +have_ct_tool=0 +ret=0 + +cleanup() +{ + ip netns del $ns +} + +checktool (){ + if ! $1 > /dev/null 2>&1; then + echo "SKIP: Could not $2" + exit $ksft_skip + fi +} + +checktool "nft --version" "run test without nft tool" +checktool "ip -Version" "run test without ip tool" +checktool "socat -V" "run test without socat tool" +checktool "ip netns add $ns" "create net namespace" + +trap cleanup EXIT + +conntrack -V > /dev/null 2>&1 +if [ $? -eq 0 ];then + have_ct_tool=1 +fi + +ip -net "$ns" link set lo up + +test_zones() { + local max_zones=$1 + +ip netns exec $ns sysctl -q net.netfilter.nf_conntrack_udp_timeout=3600 +ip netns exec $ns nft -f /dev/stdin<<EOF +flush ruleset +table inet raw { + map rndzone { + typeof numgen inc mod $max_zones : ct zone + } + + chain output { + type filter hook output priority -64000; policy accept; + udp dport 12345 ct zone set numgen inc mod 65536 map @rndzone + } +} +EOF + ( + echo "add element inet raw rndzone {" + for i in $(seq 1 $max_zones);do + echo -n "$i : $i" + if [ $i -lt $max_zones ]; then + echo "," + else + echo "}" + fi + done + ) | ip netns exec $ns nft -f /dev/stdin + + local i=0 + local j=0 + local outerstart=$(date +%s%3N) + local stop=$outerstart + + while [ $i -lt $max_zones ]; do + local start=$(date +%s%3N) + i=$((i + 1000)) + j=$((j + 1)) + # nft rule in output places each packet in a different zone. + dd if=/dev/zero of=/dev/stdout bs=8k count=1000 2>/dev/null | ip netns exec "$ns" socat STDIN UDP:127.0.0.1:12345,sourceport=12345 + if [ $? -ne 0 ] ;then + ret=1 + break + fi + + stop=$(date +%s%3N) + local duration=$((stop-start)) + echo "PASS: added 1000 entries in $duration ms (now $i total, loop $j)" + done + + if [ $have_ct_tool -eq 1 ]; then + local count=$(ip netns exec "$ns" conntrack -C) + local duration=$((stop-outerstart)) + + if [ $count -eq $max_zones ]; then + echo "PASS: inserted $count entries from packet path in $duration ms total" + else + ip netns exec $ns conntrack -S 1>&2 + echo "FAIL: inserted $count entries from packet path in $duration ms total, expected $max_zones entries" + ret=1 + fi + fi + + if [ $ret -ne 0 ];then + echo "FAIL: insert $max_zones entries from packet path" 1>&2 + fi +} + +test_conntrack_tool() { + local max_zones=$1 + + ip netns exec $ns conntrack -F >/dev/null 2>/dev/null + + local outerstart=$(date +%s%3N) + local start=$(date +%s%3N) + local stop=$start + local i=0 + while [ $i -lt $max_zones ]; do + i=$((i + 1)) + ip netns exec "$ns" conntrack -I -s 1.1.1.1 -d 2.2.2.2 --protonum 6 \ + --timeout 3600 --state ESTABLISHED --sport 12345 --dport 1000 --zone $i >/dev/null 2>&1 + if [ $? -ne 0 ];then + ip netns exec "$ns" conntrack -I -s 1.1.1.1 -d 2.2.2.2 --protonum 6 \ + --timeout 3600 --state ESTABLISHED --sport 12345 --dport 1000 --zone $i > /dev/null + echo "FAIL: conntrack -I returned an error" + ret=1 + break + fi + + if [ $((i%1000)) -eq 0 ];then + stop=$(date +%s%3N) + + local duration=$((stop-start)) + echo "PASS: added 1000 entries in $duration ms (now $i total)" + start=$stop + fi + done + + local count=$(ip netns exec "$ns" conntrack -C) + local duration=$((stop-outerstart)) + + if [ $count -eq $max_zones ]; then + echo "PASS: inserted $count entries via ctnetlink in $duration ms" + else + ip netns exec $ns conntrack -S 1>&2 + echo "FAIL: inserted $count entries via ctnetlink in $duration ms, expected $max_zones entries ($duration ms)" + ret=1 + fi +} + +test_zones $zones + +if [ $have_ct_tool -eq 1 ];then + test_conntrack_tool $zones +else + echo "SKIP: Could not run ctnetlink insertion test without conntrack tool" + if [ $ret -eq 0 ];then + exit $ksft_skip + fi +fi + +exit $ret diff --git a/tools/testing/selftests/netfilter/rpath.sh b/tools/testing/selftests/netfilter/rpath.sh new file mode 100755 index 000000000000..f7311e66d219 --- /dev/null +++ b/tools/testing/selftests/netfilter/rpath.sh @@ -0,0 +1,149 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +# return code to signal skipped test +ksft_skip=4 + +# search for legacy iptables (it uses the xtables extensions +if iptables-legacy --version >/dev/null 2>&1; then + iptables='iptables-legacy' +elif iptables --version >/dev/null 2>&1; then + iptables='iptables' +else + iptables='' +fi + +if ip6tables-legacy --version >/dev/null 2>&1; then + ip6tables='ip6tables-legacy' +elif ip6tables --version >/dev/null 2>&1; then + ip6tables='ip6tables' +else + ip6tables='' +fi + +if nft --version >/dev/null 2>&1; then + nft='nft' +else + nft='' +fi + +if [ -z "$iptables$ip6tables$nft" ]; then + echo "SKIP: Test needs iptables, ip6tables or nft" + exit $ksft_skip +fi + +sfx=$(mktemp -u "XXXXXXXX") +ns1="ns1-$sfx" +ns2="ns2-$sfx" +trap "ip netns del $ns1; ip netns del $ns2" EXIT + +# create two netns, disable rp_filter in ns2 and +# keep IPv6 address when moving into VRF +ip netns add "$ns1" +ip netns add "$ns2" +ip netns exec "$ns2" sysctl -q net.ipv4.conf.all.rp_filter=0 +ip netns exec "$ns2" sysctl -q net.ipv4.conf.default.rp_filter=0 +ip netns exec "$ns2" sysctl -q net.ipv6.conf.all.keep_addr_on_down=1 + +# a standard connection between the netns, should not trigger rp filter +ip -net "$ns1" link add v0 type veth peer name v0 netns "$ns2" +ip -net "$ns1" link set v0 up; ip -net "$ns2" link set v0 up +ip -net "$ns1" a a 192.168.23.2/24 dev v0 +ip -net "$ns2" a a 192.168.23.1/24 dev v0 +ip -net "$ns1" a a fec0:23::2/64 dev v0 nodad +ip -net "$ns2" a a fec0:23::1/64 dev v0 nodad + +# rp filter testing: ns1 sends packets via v0 which ns2 would route back via d0 +ip -net "$ns2" link add d0 type dummy +ip -net "$ns2" link set d0 up +ip -net "$ns1" a a 192.168.42.2/24 dev v0 +ip -net "$ns2" a a 192.168.42.1/24 dev d0 +ip -net "$ns1" a a fec0:42::2/64 dev v0 nodad +ip -net "$ns2" a a fec0:42::1/64 dev d0 nodad + +# firewall matches to test +[ -n "$iptables" ] && ip netns exec "$ns2" \ + "$iptables" -t raw -A PREROUTING -s 192.168.0.0/16 -m rpfilter +[ -n "$ip6tables" ] && ip netns exec "$ns2" \ + "$ip6tables" -t raw -A PREROUTING -s fec0::/16 -m rpfilter +[ -n "$nft" ] && ip netns exec "$ns2" $nft -f - <<EOF +table inet t { + chain c { + type filter hook prerouting priority raw; + ip saddr 192.168.0.0/16 fib saddr . iif oif exists counter + ip6 saddr fec0::/16 fib saddr . iif oif exists counter + } +} +EOF + +die() { + echo "FAIL: $*" + #ip netns exec "$ns2" "$iptables" -t raw -vS + #ip netns exec "$ns2" "$ip6tables" -t raw -vS + #ip netns exec "$ns2" nft list ruleset + exit 1 +} + +# check rule counters, return true if rule did not match +ipt_zero_rule() { # (command) + [ -n "$1" ] || return 0 + ip netns exec "$ns2" "$1" -t raw -vS | grep -q -- "-m rpfilter -c 0 0" +} +nft_zero_rule() { # (family) + [ -n "$nft" ] || return 0 + ip netns exec "$ns2" "$nft" list chain inet t c | \ + grep -q "$1 saddr .* counter packets 0 bytes 0" +} + +netns_ping() { # (netns, args...) + local netns="$1" + shift + ip netns exec "$netns" ping -q -c 1 -W 1 "$@" >/dev/null +} + +testrun() { + # clear counters first + [ -n "$iptables" ] && ip netns exec "$ns2" "$iptables" -t raw -Z + [ -n "$ip6tables" ] && ip netns exec "$ns2" "$ip6tables" -t raw -Z + if [ -n "$nft" ]; then + ( + echo "delete table inet t"; + ip netns exec "$ns2" $nft -s list table inet t; + ) | ip netns exec "$ns2" $nft -f - + fi + + # test 1: martian traffic should fail rpfilter matches + netns_ping "$ns1" -I v0 192.168.42.1 && \ + die "martian ping 192.168.42.1 succeeded" + netns_ping "$ns1" -I v0 fec0:42::1 && \ + die "martian ping fec0:42::1 succeeded" + + ipt_zero_rule "$iptables" || die "iptables matched martian" + ipt_zero_rule "$ip6tables" || die "ip6tables matched martian" + nft_zero_rule ip || die "nft IPv4 matched martian" + nft_zero_rule ip6 || die "nft IPv6 matched martian" + + # test 2: rpfilter match should pass for regular traffic + netns_ping "$ns1" 192.168.23.1 || \ + die "regular ping 192.168.23.1 failed" + netns_ping "$ns1" fec0:23::1 || \ + die "regular ping fec0:23::1 failed" + + ipt_zero_rule "$iptables" && die "iptables match not effective" + ipt_zero_rule "$ip6tables" && die "ip6tables match not effective" + nft_zero_rule ip && die "nft IPv4 match not effective" + nft_zero_rule ip6 && die "nft IPv6 match not effective" + +} + +testrun + +# repeat test with vrf device in $ns2 +ip -net "$ns2" link add vrf0 type vrf table 10 +ip -net "$ns2" link set vrf0 up +ip -net "$ns2" link set v0 master vrf0 + +testrun + +echo "PASS: netfilter reverse path match works as intended" +exit 0 |