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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>
51 lines
2.2 KiB
Diff
51 lines
2.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= <toke@redhat.com>
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Date: Wed, 29 Apr 2020 14:59:22 -0600
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Subject: [PATCH] wireguard: receive: use tunnel helpers for decapsulating ECN
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markings
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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commit eebabcb26ea1e3295704477c6cd4e772c96a9559 upstream.
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WireGuard currently only propagates ECN markings on tunnel decap according
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to the old RFC3168 specification. However, the spec has since been updated
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in RFC6040 to recommend slightly different decapsulation semantics. This
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was implemented in the kernel as a set of common helpers for ECN
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decapsulation, so let's just switch over WireGuard to using those, so it
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can benefit from this enhancement and any future tweaks. We do not drop
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packets with invalid ECN marking combinations, because WireGuard is
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frequently used to work around broken ISPs, which could be doing that.
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Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
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Reported-by: Olivier Tilmans <olivier.tilmans@nokia-bell-labs.com>
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Cc: Dave Taht <dave.taht@gmail.com>
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Cc: Rodney W. Grimes <ietf@gndrsh.dnsmgr.net>
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Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
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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/receive.c | 6 ++----
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1 file changed, 2 insertions(+), 4 deletions(-)
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--- a/drivers/net/wireguard/receive.c
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+++ b/drivers/net/wireguard/receive.c
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@@ -393,13 +393,11 @@ static void wg_packet_consume_data_done(
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len = ntohs(ip_hdr(skb)->tot_len);
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if (unlikely(len < sizeof(struct iphdr)))
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goto dishonest_packet_size;
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- if (INET_ECN_is_ce(PACKET_CB(skb)->ds))
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- IP_ECN_set_ce(ip_hdr(skb));
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+ INET_ECN_decapsulate(skb, PACKET_CB(skb)->ds, ip_hdr(skb)->tos);
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} else if (skb->protocol == htons(ETH_P_IPV6)) {
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len = ntohs(ipv6_hdr(skb)->payload_len) +
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sizeof(struct ipv6hdr);
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- if (INET_ECN_is_ce(PACKET_CB(skb)->ds))
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- IP6_ECN_set_ce(skb, ipv6_hdr(skb));
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+ INET_ECN_decapsulate(skb, PACKET_CB(skb)->ds, ipv6_get_dsfield(ipv6_hdr(skb)));
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} else {
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goto dishonest_packet_type;
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}
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