574 	struct gtp1_header *gtp1;  in gtp1u_udp_encap_recv()  local
580 	gtp1 = (struct gtp1_header *)(skb->data + sizeof(struct udphdr));  in gtp1u_udp_encap_recv()
582 	if ((gtp1->flags >> 5) != GTP_V1)  in gtp1u_udp_encap_recv()
589 	if (gtp1->type == GTP_ECHO_REQ && gtp->sk_created)  in gtp1u_udp_encap_recv()
592 	if (gtp1->type == GTP_ECHO_RSP && gtp->sk_created)  in gtp1u_udp_encap_recv()
595 	if (gtp1->type != GTP_TPDU)  in gtp1u_udp_encap_recv()
604 	if (gtp1->flags & GTP1_F_MASK)  in gtp1u_udp_encap_recv()
611 	gtp1 = (struct gtp1_header *)(skb->data + sizeof(struct udphdr));  in gtp1u_udp_encap_recv()
613 	pctx = gtp1_pdp_find(gtp, ntohl(gtp1->tid));  in gtp1u_udp_encap_recv()
755 	struct gtp1_header *gtp1;  in gtp1_push_header()  local
757 	gtp1 = skb_push(skb, sizeof(*gtp1));  in gtp1_push_header()
765 	gtp1->flags	= 0x30; /* v1, GTP-non-prime. */  in gtp1_push_header()
766 	gtp1->type	= GTP_TPDU;  in gtp1_push_header()
767 	gtp1->length	= htons(payload_len);  in gtp1_push_header()
768 	gtp1->tid	= htonl(pctx->u.v1.o_tei);  in gtp1_push_header()