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c0cb86e1d5
Rather than using the clunky, old, slower wireguard-linux-compat out of tree module, this commit does a patch-by-patch backport of upstream's wireguard to 5.4. This specific backport is in widespread use, being part of SUSE's enterprise kernel, Oracle's enterprise kernel, Google's Android kernel, Gentoo's distro kernel, and probably more I've forgotten about. It's definately the "more proper" way of adding wireguard to a kernel than the ugly compat.h hell of the wireguard-linux-compat repo. And most importantly for OpenWRT, it allows using the same module configuration code for 5.10 as for 5.4, with no need for bifurcation. These patches are from the backport tree which is maintained in the open here: https://git.zx2c4.com/wireguard-linux/log/?h=backport-5.4.y I'll be sending PRs to update this as needed. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> (cherry picked from commit3888fa7880) (cherry picked from commitd540725871) (cherry picked from commit196f3d586f) (cherry picked from commit3500fd7938) (cherry picked from commit23b801d3ba) (cherry picked from commit0c0cb97da7) (cherry picked from commit2a27f6f90a) Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
65 lines
2.5 KiB
Diff
65 lines
2.5 KiB
Diff
From 0000000000000000000000000000000000000000 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] 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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