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tunnel: introduce udp_tun_rx_dst()

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Introduce function udp_tun_rx_dst() to initialize tunnel dst on
receive path.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Reviewed-by: Jesse Gross <jesse@nicira.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pravin B Shelar
2015-08-26 23:46:50 -07:00
committed by David S. Miller
parent 980c394c53
commit c29a70d2ca
5 changed files with 97 additions and 43 deletions
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29
drivers/net/vxlan.c
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@@ -1264,36 +1264,13 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
}
if (vxlan_collect_metadata(vs)) {
tun_dst = metadata_dst_alloc(sizeof(*md), GFP_ATOMIC);
tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
cpu_to_be64(vni >> 8), sizeof(*md));
if (!tun_dst)
goto drop;
info = &tun_dst->u.tun_info;
if (vxlan_get_sk_family(vs) == AF_INET) {
const struct iphdr *iph = ip_hdr(skb);
info->key.u.ipv4.src = iph->saddr;
info->key.u.ipv4.dst = iph->daddr;
info->key.tos = iph->tos;
info->key.ttl = iph->ttl;
} else {
const struct ipv6hdr *ip6h = ipv6_hdr(skb);
info->key.u.ipv6.src = ip6h->saddr;
info->key.u.ipv6.dst = ip6h->daddr;
info->key.tos = ipv6_get_dsfield(ip6h);
info->key.ttl = ip6h->hop_limit;
}
info->key.tp_src = udp_hdr(skb)->source;
info->key.tp_dst = udp_hdr(skb)->dest;
info->mode = IP_TUNNEL_INFO_RX;
info->key.tun_flags = TUNNEL_KEY;
info->key.tun_id = cpu_to_be64(vni >> 8);
if (udp_hdr(skb)->check != 0)
info->key.tun_flags |= TUNNEL_CSUM;
md = ip_tunnel_info_opts(info, sizeof(*md));
} else {
memset(md, 0, sizeof(*md));