143 static int ipmuxid = -1;		/* IPv4 mux fd */  variable
229 		ipmuxid = 0;  in sys_check_options()
609 		ipmuxid = myioctl(udpfd, I_PLINK, (void *)tmpfd);  in plumb_ipif()
610 		if (ipmuxid < 0) {  in plumb_ipif()
615 		ipmuxid = myioctl(ipfd, I_LINK, (void *)tmpfd);  in plumb_ipif()
616 		if (ipmuxid < 0) {  in plumb_ipif()
623 	ifr.ifr_ip_muxid = ipmuxid;  in plumb_ipif()
656 	if (!plumbed && (ipmuxid == -1 || (ipfd == -1 && !use_plink)))  in unplumb_ipif()
658 	id = ipmuxid;  in unplumb_ipif()
690 	ipmuxid = -1;  in unplumb_ipif()
1715 			ipmuxid = -1;  in handle_unbind()
2342 	if (!IPCP_ENABLED || (ipmuxid == -1)) {
2380 	} else if (ipmuxid == -1) {
2405 	} else if (!if_is_up || (ipmuxid == -1)) {
2481 	if (!IPCP_ENABLED || (ipmuxid == -1)) {
2513 	if (!IPCP_ENABLED || (ipmuxid == -1 && plumb_ipif(u) == 0)) {
2586 	if (!IPCP_ENABLED || (ipmuxid == -1)) {  in sifroute()
2668 	if (!IPCP_ENABLED || (ipmuxid == -1)) {
2716 	if (!IPCP_ENABLED || (ipmuxid == -1)) {