100 static void *tcf_csum_skb_nextlayer(struct sk_buff *skb,  in tcf_csum_skb_nextlayer()  argument
104 	int ntkoff = skb_network_offset(skb);  in tcf_csum_skb_nextlayer()
107 	if (!pskb_may_pull(skb, ipl + ntkoff) || (ipl < hl) ||  in tcf_csum_skb_nextlayer()
108 	    (skb_cloned(skb) &&  in tcf_csum_skb_nextlayer()
109 	     !skb_clone_writable(skb, hl + ntkoff) &&  in tcf_csum_skb_nextlayer()
110 	     pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))  in tcf_csum_skb_nextlayer()
113 		return (void *)(skb_network_header(skb) + ihl);  in tcf_csum_skb_nextlayer()
116 static int tcf_csum_ipv4_icmp(struct sk_buff *skb,  in tcf_csum_ipv4_icmp()  argument
121 	icmph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*icmph));  in tcf_csum_ipv4_icmp()
126 	skb->csum = csum_partial(icmph, ipl - ihl, 0);  in tcf_csum_ipv4_icmp()
127 	icmph->checksum = csum_fold(skb->csum);  in tcf_csum_ipv4_icmp()
129 	skb->ip_summed = CHECKSUM_NONE;  in tcf_csum_ipv4_icmp()
134 static int tcf_csum_ipv4_igmp(struct sk_buff *skb,  in tcf_csum_ipv4_igmp()  argument
139 	igmph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*igmph));  in tcf_csum_ipv4_igmp()
144 	skb->csum = csum_partial(igmph, ipl - ihl, 0);  in tcf_csum_ipv4_igmp()
145 	igmph->csum = csum_fold(skb->csum);  in tcf_csum_ipv4_igmp()
147 	skb->ip_summed = CHECKSUM_NONE;  in tcf_csum_ipv4_igmp()
152 static int tcf_csum_ipv6_icmp(struct sk_buff *skb,  in tcf_csum_ipv6_icmp()  argument
158 	icmp6h = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*icmp6h));  in tcf_csum_ipv6_icmp()
162 	ip6h = ipv6_hdr(skb);  in tcf_csum_ipv6_icmp()
164 	skb->csum = csum_partial(icmp6h, ipl - ihl, 0);  in tcf_csum_ipv6_icmp()
167 					      skb->csum);  in tcf_csum_ipv6_icmp()
169 	skb->ip_summed = CHECKSUM_NONE;  in tcf_csum_ipv6_icmp()
174 static int tcf_csum_ipv4_tcp(struct sk_buff *skb,  in tcf_csum_ipv4_tcp()  argument
180 	tcph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*tcph));  in tcf_csum_ipv4_tcp()
184 	iph = ip_hdr(skb);  in tcf_csum_ipv4_tcp()
186 	skb->csum = csum_partial(tcph, ipl - ihl, 0);  in tcf_csum_ipv4_tcp()
188 				   iph->saddr, iph->daddr, skb->csum);  in tcf_csum_ipv4_tcp()
190 	skb->ip_summed = CHECKSUM_NONE;  in tcf_csum_ipv4_tcp()
195 static int tcf_csum_ipv6_tcp(struct sk_buff *skb,  in tcf_csum_ipv6_tcp()  argument
201 	tcph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*tcph));  in tcf_csum_ipv6_tcp()
205 	ip6h = ipv6_hdr(skb);  in tcf_csum_ipv6_tcp()
207 	skb->csum = csum_partial(tcph, ipl - ihl, 0);  in tcf_csum_ipv6_tcp()
210 				      skb->csum);  in tcf_csum_ipv6_tcp()
212 	skb->ip_summed = CHECKSUM_NONE;  in tcf_csum_ipv6_tcp()
217 static int tcf_csum_ipv4_udp(struct sk_buff *skb,  in tcf_csum_ipv4_udp()  argument
231 	udph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*udph));  in tcf_csum_ipv4_udp()
235 	iph = ip_hdr(skb);  in tcf_csum_ipv4_udp()
244 				skb->csum = csum_partial(udph, ipl - ihl, 0);  in tcf_csum_ipv4_udp()
246 				skb->csum = csum_partial(udph, ul, 0);  in tcf_csum_ipv4_udp()
253 			skb->csum = csum_partial(udph, ul, 0);  in tcf_csum_ipv4_udp()
258 						skb->csum);  in tcf_csum_ipv4_udp()
264 	skb->ip_summed = CHECKSUM_NONE;  in tcf_csum_ipv4_udp()
270 static int tcf_csum_ipv6_udp(struct sk_buff *skb,  in tcf_csum_ipv6_udp()  argument
284 	udph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*udph));  in tcf_csum_ipv6_udp()
288 	ip6h = ipv6_hdr(skb);  in tcf_csum_ipv6_udp()
295 			skb->csum = csum_partial(udph, ipl - ihl, 0);  in tcf_csum_ipv6_udp()
298 			skb->csum = csum_partial(udph, ul, 0);  in tcf_csum_ipv6_udp()
306 		skb->csum = csum_partial(udph, ul, 0);  in tcf_csum_ipv6_udp()
311 				      skb->csum);  in tcf_csum_ipv6_udp()
316 	skb->ip_summed = CHECKSUM_NONE;  in tcf_csum_ipv6_udp()
322 static int tcf_csum_ipv4(struct sk_buff *skb, u32 update_flags)  in tcf_csum_ipv4()  argument
327 	ntkoff = skb_network_offset(skb);  in tcf_csum_ipv4()
329 	if (!pskb_may_pull(skb, sizeof(*iph) + ntkoff))  in tcf_csum_ipv4()
332 	iph = ip_hdr(skb);  in tcf_csum_ipv4()
337 			if (!tcf_csum_ipv4_icmp(skb, iph->ihl * 4,  in tcf_csum_ipv4()
343 			if (!tcf_csum_ipv4_igmp(skb, iph->ihl * 4,  in tcf_csum_ipv4()
349 			if (!tcf_csum_ipv4_tcp(skb, iph->ihl * 4,  in tcf_csum_ipv4()
355 			if (!tcf_csum_ipv4_udp(skb, iph->ihl * 4,  in tcf_csum_ipv4()
361 			if (!tcf_csum_ipv4_udp(skb, iph->ihl * 4,  in tcf_csum_ipv4()
368 		if (skb_cloned(skb) &&  in tcf_csum_ipv4()
369 		    !skb_clone_writable(skb, sizeof(*iph) + ntkoff) &&  in tcf_csum_ipv4()
370 		    pskb_expand_head(skb, 0, 0, GFP_ATOMIC))  in tcf_csum_ipv4()
373 		ip_send_check(ip_hdr(skb));  in tcf_csum_ipv4()
418 static int tcf_csum_ipv6(struct sk_buff *skb, u32 update_flags)  in tcf_csum_ipv6()  argument
427 	ntkoff = skb_network_offset(skb);  in tcf_csum_ipv6()
431 	if (!pskb_may_pull(skb, hl + ntkoff))  in tcf_csum_ipv6()
434 	ip6h = ipv6_hdr(skb);  in tcf_csum_ipv6()
446 			if (!pskb_may_pull(skb, hl + sizeof(*ip6xh) + ntkoff))  in tcf_csum_ipv6()
448 			ip6xh = (void *)(skb_network_header(skb) + hl);  in tcf_csum_ipv6()
450 			if (!pskb_may_pull(skb, hl + ixhl + ntkoff))  in tcf_csum_ipv6()
452 			ip6xh = (void *)(skb_network_header(skb) + hl);  in tcf_csum_ipv6()
461 				if (!tcf_csum_ipv6_icmp(skb,  in tcf_csum_ipv6()
467 				if (!tcf_csum_ipv6_tcp(skb,  in tcf_csum_ipv6()
473 				if (!tcf_csum_ipv6_udp(skb, hl,  in tcf_csum_ipv6()
479 				if (!tcf_csum_ipv6_udp(skb, hl,  in tcf_csum_ipv6()
486 	} while (pskb_may_pull(skb, hl + 1 + ntkoff));  in tcf_csum_ipv6()
496 static int tcf_csum(struct sk_buff *skb,  in tcf_csum()  argument
505 	bstats_update(&p->tcf_bstats, skb);  in tcf_csum()
513 	switch (tc_skb_protocol(skb)) {  in tcf_csum()
515 		if (!tcf_csum_ipv4(skb, update_flags))  in tcf_csum()
519 		if (!tcf_csum_ipv6(skb, update_flags))  in tcf_csum()
533 static int tcf_csum_dump(struct sk_buff *skb,  in tcf_csum_dump()  argument
536 	unsigned char *b = skb_tail_pointer(skb);  in tcf_csum_dump()
547 	if (nla_put(skb, TCA_CSUM_PARMS, sizeof(opt), &opt))  in tcf_csum_dump()
552 	if (nla_put(skb, TCA_CSUM_TM, sizeof(t), &t))  in tcf_csum_dump()
555 	return skb->len;  in tcf_csum_dump()
558 	nlmsg_trim(skb, b);  in tcf_csum_dump()