-/** @brief Get the list of network interfaces
- * @param fd File descriptor to use
- * @param interfaces Where to put pointer to array of interfaces
- * @param ninterfaces Where to put count of interfaces
- */
-void ifreq_list(int fd, struct ifreq **interfaces, int *ninterfaces) {
- struct ifconf ifc;
- int l;
-
- ifc.ifc_len = 0;
- ifc.ifc_req = 0;
- do {
- l = ifc.ifc_len = ifc.ifc_len ? 2 * ifc.ifc_len
- : 16 * (int)sizeof (struct ifreq);
- if(!l) fatal(0, "out of memory");
- ifc.ifc_req = xrealloc(ifc.ifc_req, l);
- if(ioctl(fd, SIOCGIFCONF, &ifc) < 0)
- fatal(errno, "error calling ioctl SIOCGIFCONF");
- } while(l == ifc.ifc_len);
- *ninterfaces = ifc.ifc_len / sizeof (struct ifreq);
- *interfaces = ifc.ifc_req;
-}
-