4 #include <sys/socket.h>
11 static void *do_nameindex(int s, size_t n)
15 struct if_nameindex *idx;
17 idx = malloc(n * (sizeof(struct if_nameindex)+sizeof(struct ifreq)));
20 conf.ifc_buf = (void *)&idx[n];
21 conf.ifc_len = len = n * sizeof(struct ifreq);
22 if (ioctl(s, SIOCGIFCONF, &conf) < 0) {
26 if (conf.ifc_len == len) {
31 n = conf.ifc_len / sizeof(struct ifreq);
32 for (i=k=0; i<n; i++) {
33 if (ioctl(s, SIOCGIFINDEX, &conf.ifc_req[i]) < 0) {
37 idx[i-k].if_index = conf.ifc_req[i].ifr_ifindex;
38 idx[i-k].if_name = conf.ifc_req[i].ifr_name;
41 idx[i-k].if_index = 0;
46 struct if_nameindex *if_nameindex()
50 int s = socket(AF_UNIX, SOCK_DGRAM, 0);
52 for (n=0; (p=do_nameindex(s, n)) == (void *)-1; n++);
53 __syscall(SYS_close, s);