1 // SPDX-License-Identifier: GPL-2.0-or-later
22 	struct sk_buff *segs = ERR_PTR(-EINVAL);  in udp6_ufo_fragment()
33 	if (skb->encapsulation && skb_shinfo(skb)->gso_type &  in udp6_ufo_fragment()
40 		if (!(skb_shinfo(skb)->gso_type & (SKB_GSO_UDP | SKB_GSO_UDP_L4)))  in udp6_ufo_fragment()
46 		if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4)  in udp6_ufo_fragment()
49 		mss = skb_shinfo(skb)->gso_size;  in udp6_ufo_fragment()
50 		if (unlikely(skb->len <= mss))  in udp6_ufo_fragment()
53 		/* Do software UFO. Complete and fill in the UDP checksum as HW cannot  in udp6_ufo_fragment()
54 		 * do checksum of UDP packets sent as multiple IP fragments.  in udp6_ufo_fragment()
60 		uh->check = 0;  in udp6_ufo_fragment()
61 		csum = skb_checksum(skb, 0, skb->len, 0);  in udp6_ufo_fragment()
62 		uh->check = udp_v6_check(skb->len, &ipv6h->saddr,  in udp6_ufo_fragment()
63 					  &ipv6h->daddr, csum);  in udp6_ufo_fragment()
64 		if (uh->check == 0)  in udp6_ufo_fragment()
65 			uh->check = CSUM_MANGLED_0;  in udp6_ufo_fragment()
67 		skb->ip_summed = CHECKSUM_UNNECESSARY;  in udp6_ufo_fragment()
69 		/* If there is no outer header we can fake a checksum offload  in udp6_ufo_fragment()
70 		 * due to the fact that we have already done the checksum in  in udp6_ufo_fragment()
73 		if (!skb->encap_hdr_csum)  in udp6_ufo_fragment()
78 		if (skb->mac_header < (tnl_hlen + frag_hdr_sz)) {  in udp6_ufo_fragment()
92 		unfrag_len = (skb_network_header(skb) - skb_mac_header(skb)) +  in udp6_ufo_fragment()
94 		packet_start = (u8 *) skb->head + SKB_GSO_CB(skb)->mac_offset;  in udp6_ufo_fragment()
95 		memmove(packet_start-frag_hdr_sz, packet_start, unfrag_len);  in udp6_ufo_fragment()
97 		SKB_GSO_CB(skb)->mac_offset -= frag_hdr_sz;  in udp6_ufo_fragment()
98 		skb->mac_header -= frag_hdr_sz;  in udp6_ufo_fragment()
99 		skb->network_header -= frag_hdr_sz;  in udp6_ufo_fragment()
102 		fptr->nexthdr = nexthdr;  in udp6_ufo_fragment()
103 		fptr->reserved = 0;  in udp6_ufo_fragment()
104 		fptr->identification = ipv6_proxy_select_ident(dev_net(skb->dev), skb);  in udp6_ufo_fragment()
120 	struct net *net = dev_net(skb->dev);  in udp6_gro_lookup_skb()
125 	return __udp6_lib_lookup(net, &iph->saddr, sport,  in udp6_gro_lookup_skb()
126 				 &iph->daddr, dport, iif,  in udp6_gro_lookup_skb()
127 				 sdif, net->ipv4.udp_table, NULL);  in udp6_gro_lookup_skb()
140 	/* Don't bother verifying checksum if we're going to flush anyway. */  in udp6_gro_receive()
141 	if (NAPI_GRO_CB(skb)->flush)  in udp6_gro_receive()
144 	if (skb_gro_checksum_validate_zero_check(skb, IPPROTO_UDP, uh->check,  in udp6_gro_receive()
147 	else if (uh->check)  in udp6_gro_receive()
152 	NAPI_GRO_CB(skb)->is_ipv6 = 1;  in udp6_gro_receive()
155 		sk = udp6_gro_lookup_skb(skb, uh->source, uh->dest);  in udp6_gro_receive()
161 	NAPI_GRO_CB(skb)->flush = 1;  in udp6_gro_receive()
167 	const u16 offset = NAPI_GRO_CB(skb)->network_offsets[skb->encapsulation];  in udp6_gro_complete()
168 	const struct ipv6hdr *ipv6h = (struct ipv6hdr *)(skb->data + offset);  in udp6_gro_complete()
169 	struct udphdr *uh = (struct udphdr *)(skb->data + nhoff);  in udp6_gro_complete()
171 	/* do fraglist only if there is no outer UDP encap (or we already processed it) */  in udp6_gro_complete()
172 	if (NAPI_GRO_CB(skb)->is_flist && !NAPI_GRO_CB(skb)->encap_mark) {  in udp6_gro_complete()
173 		uh->len = htons(skb->len - nhoff);  in udp6_gro_complete()
175 		skb_shinfo(skb)->gso_type |= (SKB_GSO_FRAGLIST|SKB_GSO_UDP_L4);  in udp6_gro_complete()
176 		skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;  in udp6_gro_complete()
183 	if (uh->check)  in udp6_gro_complete()
184 		uh->check = ~udp_v6_check(skb->len - nhoff, &ipv6h->saddr,  in udp6_gro_complete()
185 					  &ipv6h->daddr, 0);  in udp6_gro_complete()