Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[linux-drm-fsl-dcu.git] / net / ipv6 / xfrm6_input.c

diff --git a/net/ipv6/xfrm6_input.c b/net/ipv6/xfrm6_input.c
index 00cfdee18dcac1e6fa5a95223c029426974a7f6c..25250147bdc3514c21a92332a07e0f100383f8cd 100644 (file)
--- a/net/ipv6/xfrm6_input.c
+++ b/net/ipv6/xfrm6_input.c
@@ -13,25 +13,13 @@
 #include <linux/string.h>
 #include <linux/netfilter.h>
 #include <linux/netfilter_ipv6.h>
-#include <net/dsfield.h>
-#include <net/inet_ecn.h>
-#include <net/ip.h>
 #include <net/ipv6.h>
 #include <net/xfrm.h>
 
-static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
-{
-       struct ipv6hdr *outer_iph = skb->nh.ipv6h;
-       struct ipv6hdr *inner_iph = skb->h.ipv6h;
-
-       if (INET_ECN_is_ce(ipv6_get_dsfield(outer_iph)))
-               IP6_ECN_set_ce(inner_iph);
-}
-
-int xfrm6_rcv_spi(struct sk_buff *skb, u32 spi)
+int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi)
 {
        int err;
-       u32 seq;
+       __be32 seq;
        struct xfrm_state *xfrm_vec[XFRM_MAX_DEPTH];
        struct xfrm_state *x;
        int xfrm_nr = 0;
@@ -45,7 +33,7 @@ int xfrm6_rcv_spi(struct sk_buff *skb, u32 spi)
        seq = 0;
        if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
                goto drop;
-       
+
        do {
                struct ipv6hdr *iph = skb->nh.ipv6h;
 
@@ -81,21 +69,10 @@ int xfrm6_rcv_spi(struct sk_buff *skb, u32 spi)
 
                xfrm_vec[xfrm_nr++] = x;
 
-               if (x->props.mode) { /* XXX */
-                       if (nexthdr != IPPROTO_IPV6)
-                               goto drop;
-                       if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
-                               goto drop;
-                       if (skb_cloned(skb) &&
-                           pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
-                               goto drop;
-                       if (x->props.flags & XFRM_STATE_DECAP_DSCP)
-                               ipv6_copy_dscp(skb->nh.ipv6h, skb->h.ipv6h);
-                       if (!(x->props.flags & XFRM_STATE_NOECN))
-                               ipip6_ecn_decapsulate(skb);
-                       skb->mac.raw = memmove(skb->data - skb->mac_len,
-                                              skb->mac.raw, skb->mac_len);
-                       skb->nh.raw = skb->data;
+               if (x->mode->input(x, skb))
+                       goto drop;
+
+               if (x->props.mode == XFRM_MODE_TUNNEL) { /* XXX */
                        decaps = 1;
                        break;
                }
@@ -138,7 +115,7 @@ int xfrm6_rcv_spi(struct sk_buff *skb, u32 spi)
                __skb_push(skb, skb->data - skb->nh.raw);
 
                NF_HOOK(PF_INET6, NF_IP6_PRE_ROUTING, skb, skb->dev, NULL,
-                       ip6_rcv_finish);
+                       ip6_rcv_finish);
                return -1;
 #else
                return 1;
@@ -161,3 +138,111 @@ int xfrm6_rcv(struct sk_buff **pskb)
 {
        return xfrm6_rcv_spi(*pskb, 0);
 }
+
+int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
+                    xfrm_address_t *saddr, u8 proto)
+{
+       struct xfrm_state *x = NULL;
+       int wildcard = 0;
+       struct in6_addr any;
+       xfrm_address_t *xany;
+       struct xfrm_state *xfrm_vec_one = NULL;
+       int nh = 0;
+       int i = 0;
+
+       ipv6_addr_set(&any, 0, 0, 0, 0);
+       xany = (xfrm_address_t *)&any;
+
+       for (i = 0; i < 3; i++) {
+               xfrm_address_t *dst, *src;
+               switch (i) {
+               case 0:
+                       dst = daddr;
+                       src = saddr;
+                       break;
+               case 1:
+                       /* lookup state with wild-card source address */
+                       wildcard = 1;
+                       dst = daddr;
+                       src = xany;
+                       break;
+               case 2:
+               default:
+                       /* lookup state with wild-card addresses */
+                       wildcard = 1; /* XXX */
+                       dst = xany;
+                       src = xany;
+                       break;
+               }
+
+               x = xfrm_state_lookup_byaddr(dst, src, proto, AF_INET6);
+               if (!x)
+                       continue;
+
+               spin_lock(&x->lock);
+
+               if (wildcard) {
+                       if ((x->props.flags & XFRM_STATE_WILDRECV) == 0) {
+                               spin_unlock(&x->lock);
+                               xfrm_state_put(x);
+                               x = NULL;
+                               continue;
+                       }
+               }
+
+               if (unlikely(x->km.state != XFRM_STATE_VALID)) {
+                       spin_unlock(&x->lock);
+                       xfrm_state_put(x);
+                       x = NULL;
+                       continue;
+               }
+               if (xfrm_state_check_expire(x)) {
+                       spin_unlock(&x->lock);
+                       xfrm_state_put(x);
+                       x = NULL;
+                       continue;
+               }
+
+               nh = x->type->input(x, skb);
+               if (nh <= 0) {
+                       spin_unlock(&x->lock);
+                       xfrm_state_put(x);
+                       x = NULL;
+                       continue;
+               }
+
+               x->curlft.bytes += skb->len;
+               x->curlft.packets++;
+
+               spin_unlock(&x->lock);
+
+               xfrm_vec_one = x;
+               break;
+       }
+
+       if (!xfrm_vec_one)
+               goto drop;
+
+       /* Allocate new secpath or COW existing one. */
+       if (!skb->sp || atomic_read(&skb->sp->refcnt) != 1) {
+               struct sec_path *sp;
+               sp = secpath_dup(skb->sp);
+               if (!sp)
+                       goto drop;
+               if (skb->sp)
+                       secpath_put(skb->sp);
+               skb->sp = sp;
+       }
+
+       if (1 + skb->sp->len > XFRM_MAX_DEPTH)
+               goto drop;
+
+       skb->sp->xvec[skb->sp->len] = xfrm_vec_one;
+       skb->sp->len ++;
+
+       return 1;
+drop:
+       if (xfrm_vec_one)
+               xfrm_state_put(xfrm_vec_one);
+       return -1;
+}