#define dhcpv6_for_each_option(start, end, otype, olen, odata)\
for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (uint8_t*)(end) &&\
((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
- ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (uint8_t*)(end); \
+ ((olen) = _o[2] << 8 | _o[3]); \
_o += 4 + (_o[2] << 8 | _o[3]))
int dhcpv6_request(enum dhcpv6_msg type);
int dhcpv6_poll_reconfigure(void);
int dhcpv6_promote_server_cand(void);
-void dhcpv6_clear_all_server_cand(void);
int init_rtnetlink(void);
int set_rtnetlink_addr(int ifindex, const struct in6_addr *addr,