[IPV6] IP6TUNNEL: Split out generic routine in ip6ip6_rcv().
This enables to add IPv4/IPv6 specific handling later,
Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 6022fc5..985d106 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -513,14 +513,17 @@
return 0;
}
-static inline void ip6ip6_ecn_decapsulate(struct ipv6hdr *outer_iph,
- struct sk_buff *skb)
+static void ip6ip6_dscp_ecn_decapsulate(struct ip6_tnl *t,
+ struct ipv6hdr *ipv6h,
+ struct sk_buff *skb)
{
- struct ipv6hdr *inner_iph = skb->nh.ipv6h;
+ if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY)
+ ipv6_copy_dscp(ipv6h, skb->nh.ipv6h);
- if (INET_ECN_is_ce(ipv6_get_dsfield(outer_iph)))
- IP6_ECN_set_ce(inner_iph);
+ if (INET_ECN_is_ce(ipv6_get_dsfield(ipv6h)))
+ IP6_ECN_set_ce(skb->nh.ipv6h);
}
+
static inline int ip6_tnl_rcv_ctl(struct ip6_tnl *t)
{
struct ip6_tnl_parm *p = &t->parms;
@@ -546,12 +549,16 @@
/**
* ip6ip6_rcv - decapsulate IPv6 packet and retransmit it locally
* @skb: received socket buffer
+ * @protocol: ethernet protocol ID
+ * @dscp_ecn_decapsulate: the function to decapsulate DSCP code and ECN
*
* Return: 0
**/
-static int
-ip6ip6_rcv(struct sk_buff *skb)
+static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
+ void (*dscp_ecn_decapsulate)(struct ip6_tnl *t,
+ struct ipv6hdr *ipv6h,
+ struct sk_buff *skb))
{
struct ipv6hdr *ipv6h;
struct ip6_tnl *t;
@@ -574,16 +581,16 @@
secpath_reset(skb);
skb->mac.raw = skb->nh.raw;
skb->nh.raw = skb->data;
- skb->protocol = htons(ETH_P_IPV6);
+ skb->protocol = htons(protocol);
skb->pkt_type = PACKET_HOST;
memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
skb->dev = t->dev;
dst_release(skb->dst);
skb->dst = NULL;
nf_reset(skb);
- if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY)
- ipv6_copy_dscp(ipv6h, skb->nh.ipv6h);
- ip6ip6_ecn_decapsulate(ipv6h, skb);
+
+ dscp_ecn_decapsulate(t, ipv6h, skb);
+
t->stat.rx_packets++;
t->stat.rx_bytes += skb->len;
netif_rx(skb);
@@ -598,6 +605,11 @@
return 0;
}
+static int ip6ip6_rcv(struct sk_buff *skb)
+{
+ return ip6_tnl_rcv(skb, ETH_P_IPV6, ip6ip6_dscp_ecn_decapsulate);
+}
+
struct ipv6_tel_txoption {
struct ipv6_txoptions ops;
__u8 dst_opt[8];