19 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb)  in xfrm4_extract_input()  argument
21 	return xfrm4_extract_header(skb);  in xfrm4_extract_input()
24 static inline int xfrm4_rcv_encap_finish(struct sk_buff *skb)  in xfrm4_rcv_encap_finish()  argument
26 	if (skb->dst == NULL) {  in xfrm4_rcv_encap_finish()
27 		const struct iphdr *iph = ip_hdr(skb);  in xfrm4_rcv_encap_finish()
29 		if (ip_route_input(skb, iph->daddr, iph->saddr, iph->tos,  in xfrm4_rcv_encap_finish()
30 				   skb->dev))  in xfrm4_rcv_encap_finish()
33 	return dst_input(skb);  in xfrm4_rcv_encap_finish()
35 	kfree_skb(skb);  in xfrm4_rcv_encap_finish()
39 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,  in xfrm4_rcv_encap()  argument
42 	XFRM_SPI_SKB_CB(skb)->family = AF_INET;  in xfrm4_rcv_encap()
43 	XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);  in xfrm4_rcv_encap()
44 	return xfrm_input(skb, nexthdr, spi, encap_type);  in xfrm4_rcv_encap()
48 int xfrm4_transport_finish(struct sk_buff *skb, int async)  in xfrm4_transport_finish()  argument
50 	struct iphdr *iph = ip_hdr(skb);  in xfrm4_transport_finish()
52 	iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol;  in xfrm4_transport_finish()
59 	__skb_push(skb, skb->data - skb_network_header(skb));  in xfrm4_transport_finish()
60 	iph->tot_len = htons(skb->len);  in xfrm4_transport_finish()
63 	NF_HOOK(PF_INET, NF_INET_PRE_ROUTING, skb, skb->dev, NULL,  in xfrm4_transport_finish()
75 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)  in xfrm4_udp_encap_rcv()  argument
92 	len = skb->len - sizeof(struct udphdr);  in xfrm4_udp_encap_rcv()
93 	if (!pskb_may_pull(skb, sizeof(struct udphdr) + min(len, 8)))  in xfrm4_udp_encap_rcv()
97 	uh = udp_hdr(skb);  in xfrm4_udp_encap_rcv()
134 	if (skb_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC))  in xfrm4_udp_encap_rcv()
138 	iph = ip_hdr(skb);  in xfrm4_udp_encap_rcv()
141 	if (skb->len < iphlen + len) {  in xfrm4_udp_encap_rcv()
150 	__skb_pull(skb, len);  in xfrm4_udp_encap_rcv()
151 	skb_reset_transport_header(skb);  in xfrm4_udp_encap_rcv()
154 	return xfrm4_rcv_encap(skb, IPPROTO_ESP, 0, encap_type);  in xfrm4_udp_encap_rcv()
157 	kfree_skb(skb);  in xfrm4_udp_encap_rcv()
161 int xfrm4_rcv(struct sk_buff *skb)  in xfrm4_rcv()  argument
163 	return xfrm4_rcv_spi(skb, ip_hdr(skb)->protocol, 0);  in xfrm4_rcv()