603 	struct udphdr *uh = (struct udphdr *)(skb->data+(iph->ihl<<2));  in __udp4_lib_err()  local
611 	sk = __udp4_lib_lookup(net, iph->daddr, uh->dest,  in __udp4_lib_err()
612 			       iph->saddr, uh->source, skb->dev->ifindex, 0,  in __udp4_lib_err()
663 		ip_icmp_error(sk, skb, err, uh->dest, info, (u8 *)(uh+1));  in __udp4_lib_err()
700 	struct udphdr *uh = udp_hdr(skb);  in udp4_hwcsum()  local
712 		uh->check = ~csum_tcpudp_magic(src, dst, len,  in udp4_hwcsum()
730 		uh->check = csum_tcpudp_magic(src, dst, len, IPPROTO_UDP, csum);  in udp4_hwcsum()
731 		if (uh->check == 0)  in udp4_hwcsum()
732 			uh->check = CSUM_MANGLED_0;  in udp4_hwcsum()
743 	struct udphdr *uh = udp_hdr(skb);  in udp_set_csum()  local
746 		uh->check = 0;  in udp_set_csum()
748 		uh->check = ~udp_v4_check(len, saddr, daddr, 0);  in udp_set_csum()
750 		uh->check = 0;  in udp_set_csum()
751 		uh->check = udp_v4_check(len, saddr, daddr, lco_csum(skb));  in udp_set_csum()
752 		if (uh->check == 0)  in udp_set_csum()
753 			uh->check = CSUM_MANGLED_0;  in udp_set_csum()
758 		uh->check = ~udp_v4_check(len, saddr, daddr, 0);  in udp_set_csum()
768 	struct udphdr *uh;  in udp_send_skb()  local
778 	uh = udp_hdr(skb);  in udp_send_skb()
779 	uh->source = inet->inet_sport;  in udp_send_skb()
780 	uh->dest = fl4->fl4_dport;  in udp_send_skb()
781 	uh->len = htons(len);  in udp_send_skb()
782 	uh->check = 0;  in udp_send_skb()
800 		skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(len - sizeof(uh),  in udp_send_skb()
823 	uh->check = csum_tcpudp_magic(fl4->saddr, fl4->daddr, len,  in udp_send_skb()
825 	if (uh->check == 0)  in udp_send_skb()
826 		uh->check = CSUM_MANGLED_0;  in udp_send_skb()
2032 				    struct udphdr  *uh,  in __udp4_lib_mcast_deliver()  argument
2038 	unsigned short hnum = ntohs(uh->dest);  in __udp4_lib_mcast_deliver()
2057 		if (!__udp_is_mcast_sock(net, sk, uh->dest, daddr,  in __udp4_lib_mcast_deliver()
2058 					 uh->source, saddr, dif, sdif, hnum))  in __udp4_lib_mcast_deliver()
2101 static inline int udp4_csum_init(struct sk_buff *skb, struct udphdr *uh,  in udp4_csum_init()  argument
2110 		err = udplite_checksum_init(skb, uh);  in udp4_csum_init()
2123 	return (__force int)skb_checksum_init_zero_check(skb, proto, uh->check,  in udp4_csum_init()
2131 			       struct udphdr *uh)  in udp_unicast_rcv_skb()  argument
2135 	if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk))  in udp_unicast_rcv_skb()
2136 		skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check,  in udp_unicast_rcv_skb()
2157 	struct udphdr *uh;  in __udp4_lib_rcv()  local
2169 	uh   = udp_hdr(skb);  in __udp4_lib_rcv()
2170 	ulen = ntohs(uh->len);  in __udp4_lib_rcv()
2179 		if (ulen < sizeof(*uh) || pskb_trim_rcsum(skb, ulen))  in __udp4_lib_rcv()
2181 		uh = udp_hdr(skb);  in __udp4_lib_rcv()
2184 	if (udp4_csum_init(skb, uh, proto))  in __udp4_lib_rcv()
2195 		ret = udp_unicast_rcv_skb(sk, skb, uh);  in __udp4_lib_rcv()
2201 		return __udp4_lib_mcast_deliver(net, skb, uh,  in __udp4_lib_rcv()
2204 	sk = __udp4_lib_lookup_skb(skb, uh->source, uh->dest, udptable);  in __udp4_lib_rcv()
2206 		return udp_unicast_rcv_skb(sk, skb, uh);  in __udp4_lib_rcv()
2229 			    &saddr, ntohs(uh->source),  in __udp4_lib_rcv()
2231 			    &daddr, ntohs(uh->dest));  in __udp4_lib_rcv()
2241 			    &saddr, ntohs(uh->source), &daddr, ntohs(uh->dest),  in __udp4_lib_rcv()
2312 	const struct udphdr *uh;  in udp_v4_early_demux()  local
2324 	uh = udp_hdr(skb);  in udp_v4_early_demux()
2337 		sk = __udp4_lib_mcast_demux_lookup(net, uh->dest, iph->daddr,  in udp_v4_early_demux()
2338 						   uh->source, iph->saddr,  in udp_v4_early_demux()
2341 		sk = __udp4_lib_demux_lookup(net, uh->dest, iph->daddr,  in udp_v4_early_demux()
2342 					     uh->source, iph->saddr, dif, sdif);  in udp_v4_early_demux()