28 } rxcnt SEC(".maps");
35 } vip2tnl SEC(".maps");
56 			return -1;  in get_dport()
57 		return th->dest;  in get_dport()
61 			return -1;  in get_dport()
62 		return uh->dest;  in get_dport()
73 	memcpy(new_eth->h_source, old_eth->h_dest, sizeof(new_eth->h_source));  in set_ethhdr()
74 	memcpy(new_eth->h_dest, tnl->dmac, sizeof(new_eth->h_dest));  in set_ethhdr()
75 	new_eth->h_proto = h_proto;  in set_ethhdr()
80 	void *data_end = (void *)(long)xdp->data_end;  in handle_ipv4()
81 	void *data = (void *)(long)xdp->data;  in handle_ipv4()
96 	dport = get_dport(iph + 1, data_end, iph->protocol);  in handle_ipv4()
97 	if (dport == -1)  in handle_ipv4()
100 	vip.protocol = iph->protocol;  in handle_ipv4()
102 	vip.daddr.v4 = iph->daddr;  in handle_ipv4()
104 	payload_len = bpf_ntohs(iph->tot_len);  in handle_ipv4()
107 	/* It only does v4-in-v4 */  in handle_ipv4()
108 	if (!tnl || tnl->family != AF_INET)  in handle_ipv4()
111 	if (bpf_xdp_adjust_head(xdp, 0 - (int)sizeof(struct iphdr)))  in handle_ipv4()
114 	data = (void *)(long)xdp->data;  in handle_ipv4()
115 	data_end = (void *)(long)xdp->data_end;  in handle_ipv4()
128 	iph->version = 4;  in handle_ipv4()
129 	iph->ihl = sizeof(*iph) >> 2;  in handle_ipv4()
130 	iph->frag_off =	0;  in handle_ipv4()
131 	iph->protocol = IPPROTO_IPIP;  in handle_ipv4()
132 	iph->check = 0;  in handle_ipv4()
133 	iph->tos = 0;  in handle_ipv4()
134 	iph->tot_len = bpf_htons(payload_len + sizeof(*iph));  in handle_ipv4()
135 	iph->daddr = tnl->daddr.v4;  in handle_ipv4()
136 	iph->saddr = tnl->saddr.v4;  in handle_ipv4()
137 	iph->ttl = 8;  in handle_ipv4()
144 	iph->check = ~((csum & 0xffff) + (csum >> 16));  in handle_ipv4()
153 	void *data_end = (void *)(long)xdp->data_end;  in handle_ipv6()
154 	void *data = (void *)(long)xdp->data;  in handle_ipv6()
166 	dport = get_dport(ip6h + 1, data_end, ip6h->nexthdr);  in handle_ipv6()
167 	if (dport == -1)  in handle_ipv6()
170 	vip.protocol = ip6h->nexthdr;  in handle_ipv6()
172 	memcpy(vip.daddr.v6, ip6h->daddr.s6_addr32, sizeof(vip.daddr));  in handle_ipv6()
174 	payload_len = ip6h->payload_len;  in handle_ipv6()
177 	/* It only does v6-in-v6 */  in handle_ipv6()
178 	if (!tnl || tnl->family != AF_INET6)  in handle_ipv6()
181 	if (bpf_xdp_adjust_head(xdp, 0 - (int)sizeof(struct ipv6hdr)))  in handle_ipv6()
184 	data = (void *)(long)xdp->data;  in handle_ipv6()
185 	data_end = (void *)(long)xdp->data_end;  in handle_ipv6()
197 	ip6h->version = 6;  in handle_ipv6()
198 	ip6h->priority = 0;  in handle_ipv6()
199 	memset(ip6h->flow_lbl, 0, sizeof(ip6h->flow_lbl));  in handle_ipv6()
200 	ip6h->payload_len = bpf_htons(bpf_ntohs(payload_len) + sizeof(*ip6h));  in handle_ipv6()
201 	ip6h->nexthdr = IPPROTO_IPV6;  in handle_ipv6()
202 	ip6h->hop_limit = 8;  in handle_ipv6()
203 	memcpy(ip6h->saddr.s6_addr32, tnl->saddr.v6, sizeof(tnl->saddr.v6));  in handle_ipv6()
204 	memcpy(ip6h->daddr.s6_addr32, tnl->daddr.v6, sizeof(tnl->daddr.v6));  in handle_ipv6()
211 SEC("xdp")
214 	void *data_end = (void *)(long)xdp->data_end;  in _xdp_tx_iptunnel()
215 	void *data = (void *)(long)xdp->data;  in _xdp_tx_iptunnel()
222 	h_proto = eth->h_proto;  in _xdp_tx_iptunnel()
233 char _license[] SEC("license") = "GPL";