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https://github.com/openwrt/openwrt.git
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65 lines
2.5 KiB
Diff
65 lines
2.5 KiB
Diff
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From a16efc93a9c12bbfbff6d50811332e687cc527a9 Mon Sep 17 00:00:00 2001
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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
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Date: Tue, 11 Feb 2020 20:47:08 +0100
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Subject: [PATCH 086/124] wireguard: device: use icmp_ndo_send helper
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commit a12d7f3cbdc72c7625881c8dc2660fc2c979fdf2 upstream.
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Because wireguard is calling icmp from network device context, it should
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use the ndo helper so that the rate limiting applies correctly. This
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commit adds a small test to the wireguard test suite to ensure that the
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new functions continue doing the right thing in the context of
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wireguard. It does this by setting up a condition that will definately
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evoke an icmp error message from the driver, but along a nat'd path.
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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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---
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drivers/net/wireguard/device.c | 4 ++--
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tools/testing/selftests/wireguard/netns.sh | 11 +++++++++++
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2 files changed, 13 insertions(+), 2 deletions(-)
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--- a/drivers/net/wireguard/device.c
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+++ b/drivers/net/wireguard/device.c
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@@ -203,9 +203,9 @@ err_peer:
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err:
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++dev->stats.tx_errors;
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if (skb->protocol == htons(ETH_P_IP))
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- icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0);
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+ icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0);
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else if (skb->protocol == htons(ETH_P_IPV6))
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- icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0);
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+ icmpv6_ndo_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0);
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kfree_skb(skb);
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return ret;
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}
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--- a/tools/testing/selftests/wireguard/netns.sh
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+++ b/tools/testing/selftests/wireguard/netns.sh
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@@ -24,6 +24,7 @@
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set -e
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exec 3>&1
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+export LANG=C
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export WG_HIDE_KEYS=never
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netns0="wg-test-$$-0"
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netns1="wg-test-$$-1"
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@@ -297,7 +298,17 @@ ip1 -4 rule add table main suppress_pref
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n1 ping -W 1 -c 100 -f 192.168.99.7
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n1 ping -W 1 -c 100 -f abab::1111
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+# Have ns2 NAT into wg0 packets from ns0, but return an icmp error along the right route.
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+n2 iptables -t nat -A POSTROUTING -s 10.0.0.0/24 -d 192.168.241.0/24 -j SNAT --to 192.168.241.2
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+n0 iptables -t filter -A INPUT \! -s 10.0.0.0/24 -i vethrs -j DROP # Manual rpfilter just to be explicit.
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+n2 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward'
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+ip0 -4 route add 192.168.241.1 via 10.0.0.100
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+n2 wg set wg0 peer "$pub1" remove
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+[[ $(! n0 ping -W 1 -c 1 192.168.241.1 || false) == *"From 10.0.0.100 icmp_seq=1 Destination Host Unreachable"* ]]
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+
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n0 iptables -t nat -F
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+n0 iptables -t filter -F
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+n2 iptables -t nat -F
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ip0 link del vethrc
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ip0 link del vethrs
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ip1 link del wg0
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