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net: ipip: implement header_ops->parse_protocol for AF_PACKET

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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>
This commit is contained in:
Jason A. Donenfeld 2020-06-29 19:06:19 -06:00 committed by David S. Miller
parent 2606aff916
commit e53ac93220
2 changed files with 2 additions and 0 deletions
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1
net/ipv4/ipip.c
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@ -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;

1
net/ipv6/ip6_tunnel.c
View File

@ -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;