184 static int	ipfd;  variable
588     ipfd = open(mux_dev_name, O_RDWR, 0);  in sys_init()
589     if (ipfd < 0)  in sys_init()
692     ipmuxid = ioctl(ipfd, I_PLINK, ifd);  in sys_init()
712     if (ioctl(ipfd, SIOCSIFMUXID, &ifr) < 0) {  in sys_init()
713 	ioctl(ipfd, I_PUNLINK, ipmuxid);  in sys_init()
728     ipmuxid = ioctl(ipfd, I_LINK, ifd);  in sys_init()
738 	ioctl(ipfd, I_PUNLINK, ipmuxid);  in sys_init()
750 	ioctl(ipfd, I_PUNLINK, ipmuxid);  in sys_init()
760     if (strioctl(ipfd, SIOCSIFNAME, (char *)&ifr, sizeof ifr, 0) < 0)  in sys_init()
799     if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) {  in sys_cleanup()
804     if (ioctl(ipfd, SIOCGIFMUXID, &ifr) < 0) {  in sys_cleanup()
811     if (ioctl(ipfd, I_PUNLINK, ipmuxid) < 0) {  in sys_cleanup()
847     close(ipfd);  in sys_close()
1517     if (ioctl(ipfd, SIOCSIFMTU, &ifr) < 0) {
1772     if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) {
1777     if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
1797     if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) {
1802     if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
1980     if (ioctl(ipfd, SIOCSIFNETMASK, &ifr) < 0) {
1986     if (ioctl(ipfd, SIOCSIFADDR, &ifr) < 0) {
1995     if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) >= 0
1998 	if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
2005     if (ioctl(ipfd, SIOCSIFDSTADDR, &ifr) < 0) {
2027 	if (ioctl(ipfd, I_UNLINK, ipmuxid) < 0) {
2058     if (ioctl(ipfd, SIOCADDRT, &rt) < 0) {
2087     if (ioctl(ipfd, SIOCDELRT, &rt) < 0) {
2113     if (ioctl(ipfd, SIOCSARP, (caddr_t) &arpreq) < 0) {
2135     if (ioctl(ipfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
2164     if (ioctl(ipfd, SIOCGIFNUM, &nif) < 0)
2171     if (ioctl(ipfd, SIOCGIFCONF, &ifc) < 0) {
2184 	if (ioctl(ipfd, SIOCGIFFLAGS, &ifreq) < 0)
2193 	if (ioctl(ipfd, SIOCGIFNETMASK, &ifreq) < 0)
2416     if (ioctl(ipfd, SIOCGIFNUM, &nif) < 0)
2423     if (ioctl(ipfd, SIOCGIFCONF, &ifc) < 0) {
2442 	if (ioctl(ipfd, SIOCGIFFLAGS, &ifreq) < 0)
2450 	if (ioctl(ipfd, SIOCGIFNETMASK, &ifreq) < 0)
2618     if (ioctl(ipfd, SIOCDELRT, &rt) < 0) {