20 int ip_route_me_harder(struct sk_buff *skb, unsigned int addr_type)  in ip_route_me_harder()  argument
22 	struct net *net = dev_net(skb_dst(skb)->dev);  in ip_route_me_harder()
23 	const struct iphdr *iph = ip_hdr(skb);  in ip_route_me_harder()
27 	__u8 flags = skb->sk ? inet_sk_flowi_flags(skb->sk) : 0;  in ip_route_me_harder()
43 	fl4.flowi4_oif = skb->sk ? skb->sk->sk_bound_dev_if : 0;  in ip_route_me_harder()
44 	fl4.flowi4_mark = skb->mark;  in ip_route_me_harder()
51 	skb_dst_drop(skb);  in ip_route_me_harder()
52 	skb_dst_set(skb, &rt->dst);  in ip_route_me_harder()
54 	if (skb_dst(skb)->error)  in ip_route_me_harder()
55 		return skb_dst(skb)->error;  in ip_route_me_harder()
58 	if (!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&  in ip_route_me_harder()
59 	    xfrm_decode_session(skb, flowi4_to_flowi(&fl4), AF_INET) == 0) {  in ip_route_me_harder()
60 		struct dst_entry *dst = skb_dst(skb);  in ip_route_me_harder()
61 		skb_dst_set(skb, NULL);  in ip_route_me_harder()
62 		dst = xfrm_lookup(net, dst, flowi4_to_flowi(&fl4), skb->sk, 0);  in ip_route_me_harder()
65 		skb_dst_set(skb, dst);  in ip_route_me_harder()
70 	hh_len = skb_dst(skb)->dev->hard_header_len;  in ip_route_me_harder()
71 	if (skb_headroom(skb) < hh_len &&  in ip_route_me_harder()
72 	    pskb_expand_head(skb, HH_DATA_ALIGN(hh_len - skb_headroom(skb)),  in ip_route_me_harder()
92 static void nf_ip_saveroute(const struct sk_buff *skb,  in nf_ip_saveroute()  argument
98 		const struct iphdr *iph = ip_hdr(skb);  in nf_ip_saveroute()
103 		rt_info->mark = skb->mark;  in nf_ip_saveroute()
107 static int nf_ip_reroute(struct sk_buff *skb,  in nf_ip_reroute()  argument
113 		const struct iphdr *iph = ip_hdr(skb);  in nf_ip_reroute()
116 		      skb->mark == rt_info->mark &&  in nf_ip_reroute()
119 			return ip_route_me_harder(skb, RTN_UNSPEC);  in nf_ip_reroute()
124 __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,  in nf_ip_checksum()  argument
127 	const struct iphdr *iph = ip_hdr(skb);  in nf_ip_checksum()
130 	switch (skb->ip_summed) {  in nf_ip_checksum()
134 		if ((protocol == 0 && !csum_fold(skb->csum)) ||  in nf_ip_checksum()
136 				       skb->len - dataoff, protocol,  in nf_ip_checksum()
137 				       skb->csum)) {  in nf_ip_checksum()
138 			skb->ip_summed = CHECKSUM_UNNECESSARY;  in nf_ip_checksum()
144 			skb->csum = 0;  in nf_ip_checksum()
146 			skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr,  in nf_ip_checksum()
147 						       skb->len - dataoff,  in nf_ip_checksum()
149 		csum = __skb_checksum_complete(skb);  in nf_ip_checksum()
155 static __sum16 nf_ip_checksum_partial(struct sk_buff *skb, unsigned int hook,  in nf_ip_checksum_partial()  argument
159 	const struct iphdr *iph = ip_hdr(skb);  in nf_ip_checksum_partial()
162 	switch (skb->ip_summed) {  in nf_ip_checksum_partial()
164 		if (len == skb->len - dataoff)  in nf_ip_checksum_partial()
165 			return nf_ip_checksum(skb, hook, dataoff, protocol);  in nf_ip_checksum_partial()
168 		skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr, protocol,  in nf_ip_checksum_partial()
169 					       skb->len - dataoff, 0);  in nf_ip_checksum_partial()
170 		skb->ip_summed = CHECKSUM_NONE;  in nf_ip_checksum_partial()
171 		return __skb_checksum_complete_head(skb, dataoff + len);  in nf_ip_checksum_partial()