49 int iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb,  in iptunnel_xmit()  argument
53 	int pkt_len = skb->len;  in iptunnel_xmit()
57 	skb_scrub_packet(skb, xnet);  in iptunnel_xmit()
59 	skb_clear_hash(skb);  in iptunnel_xmit()
60 	skb_dst_set(skb, &rt->dst);  in iptunnel_xmit()
61 	memset(IPCB(skb), 0, sizeof(*IPCB(skb)));  in iptunnel_xmit()
64 	skb_push(skb, sizeof(struct iphdr));  in iptunnel_xmit()
65 	skb_reset_network_header(skb);  in iptunnel_xmit()
67 	iph = ip_hdr(skb);  in iptunnel_xmit()
78 			  skb_shinfo(skb)->gso_segs ?: 1);  in iptunnel_xmit()
80 	err = ip_local_out_sk(sk, skb);  in iptunnel_xmit()
87 int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto)  in iptunnel_pull_header()  argument
89 	if (unlikely(!pskb_may_pull(skb, hdr_len)))  in iptunnel_pull_header()
92 	skb_pull_rcsum(skb, hdr_len);  in iptunnel_pull_header()
97 		if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))  in iptunnel_pull_header()
100 		eh = (struct ethhdr *)skb->data;  in iptunnel_pull_header()
102 			skb->protocol = eh->h_proto;  in iptunnel_pull_header()
104 			skb->protocol = htons(ETH_P_802_2);  in iptunnel_pull_header()
107 		skb->protocol = inner_proto;  in iptunnel_pull_header()
110 	nf_reset(skb);  in iptunnel_pull_header()
111 	secpath_reset(skb);  in iptunnel_pull_header()
112 	skb_clear_hash_if_not_l4(skb);  in iptunnel_pull_header()
113 	skb_dst_drop(skb);  in iptunnel_pull_header()
114 	skb->vlan_tci = 0;  in iptunnel_pull_header()
115 	skb_set_queue_mapping(skb, 0);  in iptunnel_pull_header()
116 	skb->pkt_type = PACKET_HOST;  in iptunnel_pull_header()
121 struct sk_buff *iptunnel_handle_offloads(struct sk_buff *skb,  in iptunnel_handle_offloads()  argument
127 	if (likely(!skb->encapsulation)) {  in iptunnel_handle_offloads()
128 		skb_reset_inner_headers(skb);  in iptunnel_handle_offloads()
129 		skb->encapsulation = 1;  in iptunnel_handle_offloads()
132 	if (skb_is_gso(skb)) {  in iptunnel_handle_offloads()
133 		err = skb_unclone(skb, GFP_ATOMIC);  in iptunnel_handle_offloads()
136 		skb_shinfo(skb)->gso_type |= gso_type_mask;  in iptunnel_handle_offloads()
137 		return skb;  in iptunnel_handle_offloads()
146 		skb->encapsulation = 0;  in iptunnel_handle_offloads()
148 	if (skb->ip_summed == CHECKSUM_PARTIAL && csum_help) {  in iptunnel_handle_offloads()
149 		err = skb_checksum_help(skb);  in iptunnel_handle_offloads()
152 	} else if (skb->ip_summed != CHECKSUM_PARTIAL)  in iptunnel_handle_offloads()
153 		skb->ip_summed = CHECKSUM_NONE;  in iptunnel_handle_offloads()
155 	return skb;  in iptunnel_handle_offloads()
157 	kfree_skb(skb);  in iptunnel_handle_offloads()