--- /dev/null
+/*
+ * nameif.c - Naming Interfaces based on MAC address for busybox.
+ *
+ * Writen 2000 by Andi Kleen.
+ * Busybox port 2002 by Nick Fedchik <nick@fedchik.org.ua>
+ * Glenn McGrath <bug1@optushome.com.au>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307 USA
+ *
+ */
+
+#include <sys/syslog.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+
+#include <errno.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+#include <net/if.h>
+#include <netinet/ether.h>
+
+#include "busybox.h"
+
+/* set interface name, from <linux/sockios.h> */
+#define SIOCSIFNAME 0x8923
+/* Octets in one ethernet addr, from <linux/if_ether.h> */
+#define ETH_ALEN 6
+
+#ifndef ifr_newname
+#define ifr_newname ifr_ifru.ifru_slave
+#endif
+
+typedef struct mactable_s {
+ struct mactable_s *next;
+ struct mactable_s **pprev;
+ char *ifname;
+ struct ether_addr *mac;
+} mactable_t;
+
+static void serror_msg_and_die(const char use_syslog, const char *s, ...)
+{
+ va_list ap;
+
+ va_start(ap, s);
+
+ if (use_syslog) {
+ openlog("nameif", 0, LOG_LOCAL0);
+ syslog(LOG_ERR, s, ap);
+ closelog();
+ } else {
+ vfprintf(stderr, s, ap);
+ putc('\n', stderr);
+ }
+
+ va_end(ap);
+
+ exit(EXIT_FAILURE);
+}
+
+int nameif_main(int argc, char **argv)
+{
+ mactable_t *clist = NULL;
+ FILE *ifh;
+ char *fname = "/etc/mactab";
+ char *line;
+ unsigned short linenum = 0;
+ unsigned char use_syslog = 0;
+ int ctl_sk = -1;
+ int opt;
+
+ static struct option opts[] = {
+ {"syslog", 0, NULL, 's'},
+ {"configfile", 1, NULL, 'c'},
+ {NULL},
+ };
+
+ while ((opt = getopt_long(argc, argv, "c:s", opts, NULL)) != -1) {
+ switch (opt) {
+ case 'c':
+ fname = optarg;
+ break;
+ case 's':
+ use_syslog = 1;
+ break;
+ default:
+ show_usage();
+ }
+ }
+
+ if ((argc - optind) & 1) {
+ show_usage();
+ }
+
+ if (optind < argc) {
+ while (optind < argc) {
+ struct ether_addr *mac;
+ mactable_t *ch;
+
+ if (strlen(argv[optind]) > IF_NAMESIZE) {
+ serror_msg_and_die(use_syslog, "interface name `%s' too long", argv[optind]);
+ }
+ optind++;
+ mac = ether_aton(argv[optind]);
+ if (mac == NULL) {
+ serror_msg_and_die(use_syslog, "cannot parse MAC %s", argv[optind]);
+ }
+ ch = xcalloc(1, sizeof(mactable_t));
+ ch->ifname = strdup(argv[optind - 1]);
+ ch->mac = xcalloc(1, ETH_ALEN);
+ memcpy(ch->mac, &mac, ETH_ALEN);
+ optind++;
+ if (clist)
+ clist->pprev = &ch->next;
+ ch->next = clist;
+ ch->pprev = &clist;
+ clist = ch;
+ }
+ } else {
+ ifh = xfopen(fname, "r");
+
+ while ((line = get_line_from_file(ifh)) != NULL) {
+ struct ether_addr *mac;
+ mactable_t *ch;
+ char *line_ptr;
+ unsigned short name_length;
+
+ line_ptr = line + strspn(line, " \t");
+ if ((line_ptr[0] == '#') || (line_ptr[0] == '\n'))
+ continue;
+ name_length = strcspn(line_ptr, " \t");
+ if (name_length > IF_NAMESIZE) {
+ serror_msg_and_die(use_syslog, "interface name `%s' too long", argv[optind]);
+ }
+ ch = xcalloc(1, sizeof(mactable_t));
+ ch->ifname = strndup(line_ptr, name_length);
+ line_ptr += name_length;
+ line_ptr += strspn(line_ptr, " \t");
+ name_length = strspn(line_ptr, "0123456789ABCDEFabcdef:");
+ line_ptr[name_length] = '\0';
+ mac = ether_aton(line_ptr);
+ if (mac == NULL) {
+ serror_msg_and_die(use_syslog, "cannot parse MAC %s", argv[optind]);
+ }
+ ch->mac = xcalloc(1, ETH_ALEN);
+ memcpy(ch->mac, mac, ETH_ALEN);
+ if (clist)
+ clist->pprev = &ch->next;
+ ch->next = clist;
+ ch->pprev = &clist;
+ clist = ch;
+ free(line);
+ }
+ fclose(ifh);
+ }
+
+ ifh = xfopen("/proc/net/dev", "r");
+ while ((line = get_line_from_file(ifh)) != NULL) {
+ char *line_ptr;
+ unsigned short iface_name_length;
+ struct ifreq ifr;
+ mactable_t *ch = NULL;
+
+ linenum++;
+ if (linenum < 3)
+ continue;
+ line_ptr = line + strspn(line, " \t");
+ if (line_ptr[0] == '\n')
+ continue;
+ iface_name_length = strcspn(line_ptr, ":");
+ if (ctl_sk < 0)
+ ctl_sk = socket(PF_INET, SOCK_DGRAM, 0);
+ memset(&ifr, 0, sizeof(struct ifreq));
+ strncpy(ifr.ifr_name, line_ptr, iface_name_length);
+ if (ioctl(ctl_sk, SIOCGIFHWADDR, &ifr) < 0) {
+ serror_msg_and_die(use_syslog, "cannot change name of %s to %s: %s", ifr.ifr_name, ch->ifname, strerror(errno));
+ }
+ for (ch = clist; ch; ch = ch->next)
+ if (!memcmp(ch->mac, ifr.ifr_hwaddr.sa_data, ETH_ALEN))
+ break;
+ if (ch == NULL) {
+ continue;
+ }
+ strcpy(ifr.ifr_newname, ch->ifname);
+
+ if (ioctl(ctl_sk, SIOCSIFNAME, &ifr) < 0) {;
+ serror_msg_and_die(use_syslog, "cannot change name of %s to %s: %s", ifr.ifr_name, ch->ifname, strerror(errno));
+ }
+ *ch->pprev = ch->next;
+ free(ch);
+ free(line);
+ }
+ fclose(ifh);
+
+ while (clist) {
+ mactable_t *ch;
+
+ ch = clist;
+ clist = clist->next;
+ free(ch);
+ }
+
+ return 0;
+}
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