wireguard: implement header_ops->parse_protocol for AF_PACKET
WireGuard uses skb->protocol to determine packet type, and bails out if it's not set or set to something it's not expecting. 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 wireguard then rejects the skb. So, this wires up the ip_tunnel handler for layer 3 packets for that case. Reported-by: Hans Wippel <ndev@hwipl.net> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -262,6 +262,7 @@ static void wg_setup(struct net_device *dev)
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max(sizeof(struct ipv6hdr), sizeof(struct iphdr));
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dev->netdev_ops = &netdev_ops;
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dev->header_ops = &ip_tunnel_header_ops;
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dev->hard_header_len = 0;
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dev->addr_len = 0;
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dev->needed_headroom = DATA_PACKET_HEAD_ROOM;
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