void packet_format_tcp_flags(struct ds *, uint16_t);
const char *packet_tcp_flag_to_string(uint32_t flag);
+void ipv6_compose(struct dp_packet *, uint8_t proto, const struct in6_addr *src,
+ const struct in6_addr *dst, uint8_t tc,
+ ovs_be32 fl, uint8_t hlmit);
void compose_arp(struct dp_packet *, uint16_t arp_op,
const struct eth_addr arp_sha,
const struct eth_addr arp_tha, bool broadcast,