X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=net%2Fipv4%2Fxfrm4_input.c;h=390dcb1354a5e4f6c76ad0c9bf8d3bc238a217ab;hb=5af149cc34143c4e24abcc6355b29b3161eff3b8;hp=2fa108245413d38bd7c88fac7c71e570e98e40b9;hpb=39fe5434cb9de5da40510028b17b96bc4eb312b3;p=linux-2.6-omap-h63xx.git

diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c
index 2fa10824541..390dcb1354a 100644
--- a/net/ipv4/xfrm4_input.c
+++ b/net/ipv4/xfrm4_input.c
@@ -16,20 +16,11 @@
 #include <net/ip.h>
 #include <net/xfrm.h>
 
-static int xfrm4_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq)
+int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-	switch (nexthdr) {
-	case IPPROTO_IPIP:
-	case IPPROTO_IPV6:
-		*spi = ip_hdr(skb)->saddr;
-		*seq = 0;
-		return 0;
-	}
-
-	return xfrm_parse_spi(skb, nexthdr, spi, seq);
+	return xfrm4_extract_header(skb);
 }
 
-#ifdef CONFIG_NETFILTER
 static inline int xfrm4_rcv_encap_finish(struct sk_buff *skb)
 {
 	if (skb->dst == NULL) {
@@ -44,120 +35,33 @@ drop:
 	kfree_skb(skb);
 	return NET_RX_DROP;
 }
-#endif
 
-static int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
+int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
+		    int encap_type)
 {
-	__be32 spi, seq;
-	struct xfrm_state *xfrm_vec[XFRM_MAX_DEPTH];
-	struct xfrm_state *x;
-	int xfrm_nr = 0;
-	int decaps = 0;
-	int err = xfrm4_parse_spi(skb, ip_hdr(skb)->protocol, &spi, &seq);
-
-	if (err != 0)
-		goto drop;
-
-	do {
-		const struct iphdr *iph = ip_hdr(skb);
-
-		if (xfrm_nr == XFRM_MAX_DEPTH)
-			goto drop;
-
-		x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr, spi,
-				iph->protocol != IPPROTO_IPV6 ? iph->protocol : IPPROTO_IPIP, AF_INET);
-		if (x == NULL)
-			goto drop;
-
-		spin_lock(&x->lock);
-		if (unlikely(x->km.state != XFRM_STATE_VALID))
-			goto drop_unlock;
-
-		if ((x->encap ? x->encap->encap_type : 0) != encap_type)
-			goto drop_unlock;
-
-		if (x->props.replay_window && xfrm_replay_check(x, seq))
-			goto drop_unlock;
-
-		if (xfrm_state_check_expire(x))
-			goto drop_unlock;
-
-		if (x->type->input(x, skb))
-			goto drop_unlock;
-
-		/* only the first xfrm gets the encap type */
-		encap_type = 0;
-
-		if (x->props.replay_window)
-			xfrm_replay_advance(x, seq);
-
-		x->curlft.bytes += skb->len;
-		x->curlft.packets++;
-
-		spin_unlock(&x->lock);
-
-		xfrm_vec[xfrm_nr++] = x;
-
-		if (x->mode->input(x, skb))
-			goto drop;
-
-		if (x->props.mode == XFRM_MODE_TUNNEL) {
-			decaps = 1;
-			break;
-		}
-
-		err = xfrm_parse_spi(skb, ip_hdr(skb)->protocol, &spi, &seq);
-		if (err < 0)
-			goto drop;
-	} while (!err);
-
-	/* 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 (xfrm_nr + skb->sp->len > XFRM_MAX_DEPTH)
-		goto drop;
-
-	memcpy(skb->sp->xvec + skb->sp->len, xfrm_vec,
-	       xfrm_nr * sizeof(xfrm_vec[0]));
-	skb->sp->len += xfrm_nr;
+	XFRM_SPI_SKB_CB(skb)->family = AF_INET;
+	XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
+	return xfrm_input(skb, nexthdr, spi, encap_type);
+}
+EXPORT_SYMBOL(xfrm4_rcv_encap);
 
-	nf_reset(skb);
+int xfrm4_transport_finish(struct sk_buff *skb, int async)
+{
+	struct iphdr *iph = ip_hdr(skb);
 
-	if (decaps) {
-		dst_release(skb->dst);
-		skb->dst = NULL;
-		netif_rx(skb);
-		return 0;
-	} else {
-#ifdef CONFIG_NETFILTER
-		__skb_push(skb, skb->data - skb_network_header(skb));
-		ip_hdr(skb)->tot_len = htons(skb->len);
-		ip_send_check(ip_hdr(skb));
+	iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol;
 
-		NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL,
-			xfrm4_rcv_encap_finish);
-		return 0;
-#else
-		return -ip_hdr(skb)->protocol;
+#ifndef CONFIG_NETFILTER
+	if (!async)
+		return -iph->protocol;
 #endif
-	}
 
-drop_unlock:
-	spin_unlock(&x->lock);
-	xfrm_state_put(x);
-drop:
-	while (--xfrm_nr >= 0)
-		xfrm_state_put(xfrm_vec[xfrm_nr]);
+	__skb_push(skb, skb->data - skb_network_header(skb));
+	iph->tot_len = htons(skb->len);
+	ip_send_check(iph);
 
-	kfree_skb(skb);
+	NF_HOOK(PF_INET, NF_INET_PRE_ROUTING, skb, skb->dev, NULL,
+		xfrm4_rcv_encap_finish);
 	return 0;
 }
 
@@ -247,11 +151,8 @@ int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
 	__skb_pull(skb, len);
 	skb_reset_transport_header(skb);
 
-	/* modify the protocol (it's ESP!) */
-	iph->protocol = IPPROTO_ESP;
-
 	/* process ESP */
-	ret = xfrm4_rcv_encap(skb, encap_type);
+	ret = xfrm4_rcv_encap(skb, IPPROTO_ESP, 0, encap_type);
 	return ret;
 
 drop:
@@ -261,7 +162,7 @@ drop:
 
 int xfrm4_rcv(struct sk_buff *skb)
 {
-	return xfrm4_rcv_encap(skb, 0);
+	return xfrm4_rcv_spi(skb, ip_hdr(skb)->protocol, 0);
 }
 
 EXPORT_SYMBOL(xfrm4_rcv);