int dhcp_network_icmp6_bind_router_solicitation(int index);
int dhcp_network_icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr);
+
+int dhcp6_option_append(uint8_t **buf, size_t *buflen, uint16_t code,
+ size_t optlen, const void *optval);
+int dhcp6_option_append_ia(uint8_t **buf, size_t *buflen, DHCP6IA *ia);
+int dhcp6_option_parse(uint8_t **buf, size_t *buflen, uint16_t *optcode,
+ size_t *optlen, uint8_t **optvalue);
+
+int dhcp6_network_bind_udp_socket(int index, struct in6_addr *address);
+int dhcp6_network_send_udp_socket(int s, struct in6_addr *address,
+ const void *packet, size_t len);