87 static int tcf_nat(struct sk_buff *skb, const struct tc_action *a,  in tcf_nat()  argument
110 	bstats_update(&p->tcf_bstats, skb);  in tcf_nat()
117 	noff = skb_network_offset(skb);  in tcf_nat()
118 	if (!pskb_may_pull(skb, sizeof(*iph) + noff))  in tcf_nat()
121 	iph = ip_hdr(skb);  in tcf_nat()
129 		if (skb_cloned(skb) &&  in tcf_nat()
130 		    !skb_clone_writable(skb, sizeof(*iph) + noff) &&  in tcf_nat()
131 		    pskb_expand_head(skb, 0, 0, GFP_ATOMIC))  in tcf_nat()
138 		iph = ip_hdr(skb);  in tcf_nat()
158 		if (!pskb_may_pull(skb, ihl + sizeof(*tcph) + noff) ||  in tcf_nat()
159 		    (skb_cloned(skb) &&  in tcf_nat()
160 		     !skb_clone_writable(skb, ihl + sizeof(*tcph) + noff) &&  in tcf_nat()
161 		     pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))  in tcf_nat()
164 		tcph = (void *)(skb_network_header(skb) + ihl);  in tcf_nat()
165 		inet_proto_csum_replace4(&tcph->check, skb, addr, new_addr,  in tcf_nat()
173 		if (!pskb_may_pull(skb, ihl + sizeof(*udph) + noff) ||  in tcf_nat()
174 		    (skb_cloned(skb) &&  in tcf_nat()
175 		     !skb_clone_writable(skb, ihl + sizeof(*udph) + noff) &&  in tcf_nat()
176 		     pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))  in tcf_nat()
179 		udph = (void *)(skb_network_header(skb) + ihl);  in tcf_nat()
180 		if (udph->check || skb->ip_summed == CHECKSUM_PARTIAL) {  in tcf_nat()
181 			inet_proto_csum_replace4(&udph->check, skb, addr,  in tcf_nat()
192 		if (!pskb_may_pull(skb, ihl + sizeof(*icmph) + noff))  in tcf_nat()
195 		icmph = (void *)(skb_network_header(skb) + ihl);  in tcf_nat()
202 		if (!pskb_may_pull(skb, ihl + sizeof(*icmph) + sizeof(*iph) +  in tcf_nat()
206 		icmph = (void *)(skb_network_header(skb) + ihl);  in tcf_nat()
216 		if (skb_cloned(skb) &&  in tcf_nat()
217 		    !skb_clone_writable(skb, ihl + sizeof(*icmph) +  in tcf_nat()
219 		    pskb_expand_head(skb, 0, 0, GFP_ATOMIC))  in tcf_nat()
222 		icmph = (void *)(skb_network_header(skb) + ihl);  in tcf_nat()
234 		inet_proto_csum_replace4(&icmph->checksum, skb, addr, new_addr,  in tcf_nat()
252 static int tcf_nat_dump(struct sk_buff *skb, struct tc_action *a,  in tcf_nat_dump()  argument
255 	unsigned char *b = skb_tail_pointer(skb);  in tcf_nat_dump()
270 	if (nla_put(skb, TCA_NAT_PARMS, sizeof(opt), &opt))  in tcf_nat_dump()
275 	if (nla_put(skb, TCA_NAT_TM, sizeof(t), &t))  in tcf_nat_dump()
278 	return skb->len;  in tcf_nat_dump()
281 	nlmsg_trim(skb, b);  in tcf_nat_dump()