From e53ac93220e002fdf26b2874af6a74f393cd3872 Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Mon, 29 Jun 2020 19:06:19 -0600 Subject: [PATCH] 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 Acked-by: Willem de Bruijn Signed-off-by: David S. Miller --- net/ipv4/ipip.c | 1 + net/ipv6/ip6_tunnel.c | 1 + 2 files changed, 2 insertions(+) diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index 40fea52c8277..75d35e76bec2 100644 --- a/net/ipv4/ipip.c +++ b/net/ipv4/ipip.c @@ -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; diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 821d96c720b9..a18c378ca5f4 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -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;