Commit e53ac932 authored Jun 29, 2020 by Jason A. Donenfeld Committed by David S. Miller Jun 30, 2020

net: ipip: implement header_ops->parse_protocol for AF_PACKET



Ipip uses skb->protocol to determine packet type, and bails out if it's
not set. For AF_PACKET injection, we need to support its call chain of:

    packet_sendmsg -> packet_snd -> packet_parse_headers ->
      dev_parse_header_protocol -> parse_protocol

Without a valid parse_protocol, this returns zero, and ipip rejects the
skb. So, this wires up the ip_tunnel handler for layer 3 packets for
that case.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 2606aff9

net/ipv4/ipip.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -361,6 +361,7 @@ static const struct net_device_ops ipip_netdev_ops = {
		static void ipip_tunnel_setup(struct net_device *dev)
		{
		dev->netdev_ops = &ipip_netdev_ops;
		dev->header_ops = &ip_tunnel_header_ops;

		dev->type = ARPHRD_TUNNEL;
		dev->flags = IFF_NOARP;

net/ipv6/ip6_tunnel.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1846,6 +1846,7 @@ static const struct net_device_ops ip6_tnl_netdev_ops = {
		static void ip6_tnl_dev_setup(struct net_device *dev)
		{
		dev->netdev_ops = &ip6_tnl_netdev_ops;
		dev->header_ops = &ip_tunnel_header_ops;
		dev->needs_free_netdev = true;
		dev->priv_destructor = ip6_dev_free;

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