IPCP_HISADDR_SEEN
sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN | IPCP_MYADDR_SEEN |
sp->ipcp.flags |= IPCP_HISADDR_SEEN;
if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {