47 	struct iphdr *ip4h;  in rmnet_map_ipv4_dl_csum_trailer()  local
51 	ip4h = (struct iphdr *)(skb->data);  in rmnet_map_ipv4_dl_csum_trailer()
52 	if ((ntohs(ip4h->frag_off) & IP_MF) ||  in rmnet_map_ipv4_dl_csum_trailer()
53 	    ((ntohs(ip4h->frag_off) & IP_OFFSET) > 0)) {  in rmnet_map_ipv4_dl_csum_trailer()
58 	txporthdr = skb->data + ip4h->ihl * 4;  in rmnet_map_ipv4_dl_csum_trailer()
60 	csum_field = rmnet_map_get_csum_field(ip4h->protocol, txporthdr);  in rmnet_map_ipv4_dl_csum_trailer()
68 	if (*csum_field == 0 && ip4h->protocol == IPPROTO_UDP) {  in rmnet_map_ipv4_dl_csum_trailer()
74 	hdr_csum = ~ip_fast_csum(ip4h, (int)ip4h->ihl);  in rmnet_map_ipv4_dl_csum_trailer()
78 	pseudo_csum = ~csum_tcpudp_magic(ip4h->saddr, ip4h->daddr,  in rmnet_map_ipv4_dl_csum_trailer()
79 					 ntohs(ip4h->tot_len) - ip4h->ihl * 4,  in rmnet_map_ipv4_dl_csum_trailer()
80 					 ip4h->protocol, 0);  in rmnet_map_ipv4_dl_csum_trailer()
89 		switch (ip4h->protocol) {  in rmnet_map_ipv4_dl_csum_trailer()
183 	struct iphdr *ip4h = (struct iphdr *)iphdr;  in rmnet_map_complement_ipv4_txporthdr_csum_field()  local
187 	txphdr = iphdr + ip4h->ihl * 4;  in rmnet_map_complement_ipv4_txporthdr_csum_field()
189 	if (ip4h->protocol == IPPROTO_TCP || ip4h->protocol == IPPROTO_UDP) {  in rmnet_map_complement_ipv4_txporthdr_csum_field()
190 		csum = (u16 *)rmnet_map_get_csum_field(ip4h->protocol, txphdr);  in rmnet_map_complement_ipv4_txporthdr_csum_field()
200 	struct iphdr *ip4h = (struct iphdr *)iphdr;  in rmnet_map_ipv4_ul_csum_header()  local
208 	if (ip4h->protocol == IPPROTO_UDP)  in rmnet_map_ipv4_ul_csum_header()