2 * xfrm6_input.c: based on net/ipv4/xfrm4_input.c
6 * Kazunori MIYAZAWA @USAGI
7 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
8 * YOSHIFUJI Hideaki @USAGI
12 #include <linux/module.h>
13 #include <linux/string.h>
14 #include <linux/netfilter.h>
15 #include <linux/netfilter_ipv6.h>
19 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb)
21 return xfrm6_extract_header(skb);
24 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
26 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct ipv6hdr, daddr);
27 return xfrm_input(skb, nexthdr, spi, 0);
29 EXPORT_SYMBOL(xfrm6_rcv_spi);
31 int xfrm6_transport_finish(struct sk_buff *skb, int async)
33 skb_network_header(skb)[IP6CB(skb)->nhoff] =
34 XFRM_MODE_SKB_CB(skb)->protocol;
36 #ifdef CONFIG_NETFILTER
37 ipv6_hdr(skb)->payload_len = htons(skb->len);
38 __skb_push(skb, skb->data - skb_network_header(skb));
40 NF_HOOK(PF_INET6, NF_INET_PRE_ROUTING, skb, skb->dev, NULL,
45 return ip6_rcv_finish(skb);
51 int xfrm6_rcv(struct sk_buff *skb)
53 return xfrm6_rcv_spi(skb, skb_network_header(skb)[IP6CB(skb)->nhoff],
57 EXPORT_SYMBOL(xfrm6_rcv);
59 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
60 xfrm_address_t *saddr, u8 proto)
62 struct xfrm_state *x = NULL;
65 struct xfrm_state *xfrm_vec_one = NULL;
69 xany = (xfrm_address_t *)&in6addr_any;
71 for (i = 0; i < 3; i++) {
72 xfrm_address_t *dst, *src;
79 /* lookup state with wild-card source address */
86 /* lookup state with wild-card addresses */
87 wildcard = 1; /* XXX */
93 x = xfrm_state_lookup_byaddr(dst, src, proto, AF_INET6);
100 if ((x->props.flags & XFRM_STATE_WILDRECV) == 0) {
101 spin_unlock(&x->lock);
108 if (unlikely(x->km.state != XFRM_STATE_VALID)) {
109 spin_unlock(&x->lock);
114 if (xfrm_state_check_expire(x)) {
115 spin_unlock(&x->lock);
121 nh = x->type->input(x, skb);
123 spin_unlock(&x->lock);
129 x->curlft.bytes += skb->len;
132 spin_unlock(&x->lock);
141 /* Allocate new secpath or COW existing one. */
142 if (!skb->sp || atomic_read(&skb->sp->refcnt) != 1) {
144 sp = secpath_dup(skb->sp);
148 secpath_put(skb->sp);
152 if (1 + skb->sp->len > XFRM_MAX_DEPTH)
155 skb->sp->xvec[skb->sp->len] = xfrm_vec_one;
161 xfrm_state_put(xfrm_vec_one);
165 EXPORT_SYMBOL(xfrm6_input_addr);