rts_alloc_msg
mp = rts_alloc_msg(type, rtm_addrs, AF_INET6, 0);
new_mp = rts_alloc_msg(RTM_GET, rtm_addrs, af, gc != NULL ? 1 : 0);
mp = rts_alloc_msg(type, rtm_addrs, AF_INET, 0);
mp = rts_alloc_msg(RTM_IFINFO, RTA_IFP, af, 0);
mp = rts_alloc_msg(RTM_IFINFO, RTA_IFP, af, 0);
mp = rts_alloc_msg(cmd, rtm_addrs, af, 0);
mp = rts_alloc_msg(type, rtm_addrs, af, 0);
mp = rts_alloc_msg(type, rtm_addrs, af, 0);
extern mblk_t *rts_alloc_msg(int, int, sa_family_t, uint_t);