56 	struct iphdr *ip4h;  in rmnet_map_ipv4_dl_csum_trailer()  local
60 	ip4h = (struct iphdr *)(skb->data);  in rmnet_map_ipv4_dl_csum_trailer()
61 	if ((ntohs(ip4h->frag_off) & IP_MF) ||  in rmnet_map_ipv4_dl_csum_trailer()
62 	    ((ntohs(ip4h->frag_off) & IP_OFFSET) > 0)) {  in rmnet_map_ipv4_dl_csum_trailer()
67 	txporthdr = skb->data + ip4h->ihl * 4;  in rmnet_map_ipv4_dl_csum_trailer()
69 	csum_field = rmnet_map_get_csum_field(ip4h->protocol, txporthdr);  in rmnet_map_ipv4_dl_csum_trailer()
77 	if (*csum_field == 0 && ip4h->protocol == IPPROTO_UDP) {  in rmnet_map_ipv4_dl_csum_trailer()
83 	hdr_csum = ~ip_fast_csum(ip4h, (int)ip4h->ihl);  in rmnet_map_ipv4_dl_csum_trailer()
87 	pseudo_csum = ~csum_tcpudp_magic(ip4h->saddr, ip4h->daddr,  in rmnet_map_ipv4_dl_csum_trailer()
88 					 ntohs(ip4h->tot_len) - ip4h->ihl * 4,  in rmnet_map_ipv4_dl_csum_trailer()
89 					 ip4h->protocol, 0);  in rmnet_map_ipv4_dl_csum_trailer()
98 		switch (ip4h->protocol) {  in rmnet_map_ipv4_dl_csum_trailer()
192 	struct iphdr *ip4h = (struct iphdr *)iphdr;  in rmnet_map_complement_ipv4_txporthdr_csum_field()  local
196 	txphdr = iphdr + ip4h->ihl * 4;  in rmnet_map_complement_ipv4_txporthdr_csum_field()
198 	if (ip4h->protocol == IPPROTO_TCP || ip4h->protocol == IPPROTO_UDP) {  in rmnet_map_complement_ipv4_txporthdr_csum_field()
199 		csum = (u16 *)rmnet_map_get_csum_field(ip4h->protocol, txphdr);  in rmnet_map_complement_ipv4_txporthdr_csum_field()
209 	struct iphdr *ip4h = (struct iphdr *)iphdr;  in rmnet_map_ipv4_ul_csum_header()  local
217 	if (ip4h->protocol == IPPROTO_UDP)  in rmnet_map_ipv4_ul_csum_header()