170 	struct gre_hdr *gre, _gre;  in parse_ip_proto()  local
194 		gre = bpf_flow_dissect_get_header(skb, sizeof(*gre), &_gre);  in parse_ip_proto()
195 		if (!gre)  in parse_ip_proto()
198 		if (bpf_htons(gre->flags & GRE_VERSION))  in parse_ip_proto()
199 			/* Only inspect standard GRE packets with version 0 */  in parse_ip_proto()
202 		keys->thoff += sizeof(*gre); /* Step over GRE Flags and Proto */  in parse_ip_proto()
203 		if (GRE_IS_CSUM(gre->flags))  in parse_ip_proto()
205 		if (GRE_IS_KEY(gre->flags))  in parse_ip_proto()
207 		if (GRE_IS_SEQ(gre->flags))  in parse_ip_proto()
214 		if (gre->proto == bpf_htons(ETH_P_TEB)) {  in parse_ip_proto()
224 			return parse_eth_proto(skb, gre->proto);  in parse_ip_proto()