137 static int ipmuxid = -1;		/* IPv4 mux fd */  variable
223 		ipmuxid = 0;  in sys_check_options()
603 		ipmuxid = myioctl(udpfd, I_PLINK, (void *)tmpfd);  in plumb_ipif()
604 		if (ipmuxid < 0) {  in plumb_ipif()
609 		ipmuxid = myioctl(ipfd, I_LINK, (void *)tmpfd);  in plumb_ipif()
610 		if (ipmuxid < 0) {  in plumb_ipif()
617 	ifr.ifr_ip_muxid = ipmuxid;  in plumb_ipif()
650 	if (!plumbed && (ipmuxid == -1 || (ipfd == -1 && !use_plink)))  in unplumb_ipif()
652 	id = ipmuxid;  in unplumb_ipif()
684 	ipmuxid = -1;  in unplumb_ipif()
1656 			ipmuxid = -1;  in handle_unbind()
2283 	if (!IPCP_ENABLED || (ipmuxid == -1)) {
2321 	} else if (ipmuxid == -1) {
2346 	} else if (!if_is_up || (ipmuxid == -1)) {
2422 	if (!IPCP_ENABLED || (ipmuxid == -1)) {
2454 	if (!IPCP_ENABLED || (ipmuxid == -1 && plumb_ipif(u) == 0)) {
2527 	if (!IPCP_ENABLED || (ipmuxid == -1)) {  in sifroute()
2609 	if (!IPCP_ENABLED || (ipmuxid == -1)) {
2657 	if (!IPCP_ENABLED || (ipmuxid == -1)) {