16 static void die(const char *s)  in die()  argument
18     fprintf(stderr,"error: %s (%s)\n", s, strerror(errno));  in die()
22 static void setflags(int s, struct ifreq *ifr, int set, int clr)  in setflags()  argument
24     if(ioctl(s, SIOCGIFFLAGS, ifr) < 0) die("SIOCGIFFLAGS");  in setflags()
26     if(ioctl(s, SIOCSIFFLAGS, ifr) < 0) die("SIOCSIFFLAGS");  in setflags()
36 static void setmtu(int s, struct ifreq *ifr, const char *mtu)  in setmtu()  argument
40     if(ioctl(s, SIOCSIFMTU, ifr) < 0) die("SIOCSIFMTU");  in setmtu()
42 static void setdstaddr(int s, struct ifreq *ifr, const char *addr)  in setdstaddr()  argument
45     if(ioctl(s, SIOCSIFDSTADDR, ifr) < 0) die("SIOCSIFDSTADDR");  in setdstaddr()
48 static void setnetmask(int s, struct ifreq *ifr, const char *addr)  in setnetmask()  argument
51     if(ioctl(s, SIOCSIFNETMASK, ifr) < 0) die("SIOCSIFNETMASK");  in setnetmask()
54 static void setaddr(int s, struct ifreq *ifr, const char *addr)  in setaddr()  argument
57     if(ioctl(s, SIOCSIFADDR, ifr) < 0) die("SIOCSIFADDR");  in setaddr()
63     int s;  in ifconfig_main()  local
79     if((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {  in ifconfig_main()
84         if (ioctl(s, SIOCGIFADDR, &ifr) < 0) {  in ifconfig_main()
90         if (ioctl(s, SIOCGIFNETMASK, &ifr) < 0) {  in ifconfig_main()
96         if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {  in ifconfig_main()
129             setflags(s, &ifr, IFF_UP, 0);  in ifconfig_main()
136             setmtu(s, &ifr, argv[0]);  in ifconfig_main()
138             setflags(s, &ifr, IFF_POINTOPOINT, 1);  in ifconfig_main()
145             setdstaddr(s, &ifr, argv[0]);  in ifconfig_main()
146             setflags(s, &ifr, IFF_POINTOPOINT, 0);  in ifconfig_main()
148             setflags(s, &ifr, 0, IFF_UP);  in ifconfig_main()
155             setnetmask(s, &ifr, argv[0]);  in ifconfig_main()
157             setaddr(s, &ifr, argv[0]);  in ifconfig_main()
158             setflags(s, &ifr, IFF_UP, 0);  in ifconfig_main()