IPCP_OPT_ADDRESS
sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
case IPCP_OPT_ADDRESS:
case IPCP_OPT_ADDRESS:
buf[0] = IPCP_OPT_ADDRESS;
case IPCP_OPT_ADDRESS:
sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
case IPCP_OPT_ADDRESS:
sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
opt[i++] = IPCP_OPT_ADDRESS;
case IPCP_OPT_ADDRESS: return "address";