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Diffstat (limited to 'i/pc104/initrd/conf/busybox/networking/nameif.c')
-rw-r--r--i/pc104/initrd/conf/busybox/networking/nameif.c171
1 files changed, 171 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/networking/nameif.c b/i/pc104/initrd/conf/busybox/networking/nameif.c
new file mode 100644
index 0000000..ec77512
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/networking/nameif.c
@@ -0,0 +1,171 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * nameif.c - Naming Interfaces based on MAC address for busybox.
+ *
+ * Written 2000 by Andi Kleen.
+ * Busybox port 2002 by Nick Fedchik <nick@fedchik.org.ua>
+ * Glenn McGrath <bug1@iinet.net.au>
+ *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ */
+
+#include "busybox.h"
+#include <syslog.h>
+#include <net/if.h>
+#include <netinet/ether.h>
+
+
+/* Older versions of net/if.h do not appear to define IF_NAMESIZE. */
+#ifndef IF_NAMESIZE
+# ifdef IFNAMSIZ
+# define IF_NAMESIZE IFNAMSIZ
+# else
+# define IF_NAMESIZE 16
+# endif
+#endif
+
+/* take from linux/sockios.h */
+#define SIOCSIFNAME 0x8923 /* set interface name */
+
+/* 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 *prev;
+ char *ifname;
+ struct ether_addr *mac;
+} mactable_t;
+
+/* Check ascii str_macaddr, convert and copy to *mac */
+static struct ether_addr *cc_macaddr(const char *str_macaddr)
+{
+ struct ether_addr *lmac, *mac;
+
+ lmac = ether_aton(str_macaddr);
+ if (lmac == NULL)
+ bb_error_msg_and_die("cannot parse MAC %s", str_macaddr);
+ mac = xmalloc(ETH_ALEN);
+ memcpy(mac, lmac, ETH_ALEN);
+
+ return mac;
+}
+
+int nameif_main(int argc, char **argv);
+int nameif_main(int argc, char **argv)
+{
+ mactable_t *clist = NULL;
+ FILE *ifh;
+ const char *fname = "/etc/mactab";
+ char *line;
+ int ctl_sk;
+ int if_index = 1;
+ mactable_t *ch;
+
+ if (1 & getopt32(argc, argv, "sc:", &fname)) {
+ openlog(applet_name, 0, LOG_LOCAL0);
+ logmode = LOGMODE_SYSLOG;
+ }
+
+ if ((argc - optind) & 1)
+ bb_show_usage();
+
+ if (optind < argc) {
+ char **a = argv + optind;
+
+ while (*a) {
+ if (strlen(*a) > IF_NAMESIZE)
+ bb_error_msg_and_die("interface name '%s' "
+ "too long", *a);
+ ch = xzalloc(sizeof(mactable_t));
+ ch->ifname = xstrdup(*a++);
+ ch->mac = cc_macaddr(*a++);
+ if (clist)
+ clist->prev = ch;
+ ch->next = clist;
+ clist = ch;
+ }
+ } else {
+ ifh = xfopen(fname, "r");
+
+ while ((line = xmalloc_fgets(ifh)) != NULL) {
+ char *line_ptr;
+ size_t name_length;
+
+ line_ptr = line + strspn(line, " \t");
+ if ((line_ptr[0] == '#') || (line_ptr[0] == '\n')) {
+ free(line);
+ continue;
+ }
+ name_length = strcspn(line_ptr, " \t");
+ ch = xzalloc(sizeof(mactable_t));
+ ch->ifname = xstrndup(line_ptr, name_length);
+ if (name_length > IF_NAMESIZE)
+ bb_error_msg_and_die("interface name '%s' "
+ "too long", ch->ifname);
+ line_ptr += name_length;
+ line_ptr += strspn(line_ptr, " \t");
+ name_length = strspn(line_ptr, "0123456789ABCDEFabcdef:");
+ line_ptr[name_length] = '\0';
+ ch->mac = cc_macaddr(line_ptr);
+ if (clist)
+ clist->prev = ch;
+ ch->next = clist;
+ clist = ch;
+ free(line);
+ }
+ fclose(ifh);
+ }
+
+ ctl_sk = xsocket(PF_INET, SOCK_DGRAM, 0);
+
+ while (clist) {
+ struct ifreq ifr;
+
+ memset(&ifr, 0, sizeof(struct ifreq));
+ if_index++;
+ ifr.ifr_ifindex = if_index;
+
+ /* Get ifname by index or die */
+ if (ioctl(ctl_sk, SIOCGIFNAME, &ifr))
+ break;
+
+ /* Has this device hwaddr? */
+ if (ioctl(ctl_sk, SIOCGIFHWADDR, &ifr))
+ continue;
+
+ /* Search for mac like in ifr.ifr_hwaddr.sa_data */
+ for (ch = clist; ch; ch = ch->next)
+ if (!memcmp(ch->mac, ifr.ifr_hwaddr.sa_data, ETH_ALEN))
+ break;
+
+ /* Nothing found for current ifr.ifr_hwaddr.sa_data */
+ if (ch == NULL)
+ continue;
+
+ strcpy(ifr.ifr_newname, ch->ifname);
+ if (ioctl(ctl_sk, SIOCSIFNAME, &ifr) < 0)
+ bb_perror_msg_and_die("cannot change ifname %s to %s",
+ ifr.ifr_name, ch->ifname);
+
+ /* Remove list entry of renamed interface */
+ if (ch->prev != NULL) {
+ (ch->prev)->next = ch->next;
+ } else {
+ clist = ch->next;
+ }
+ if (ch->next != NULL)
+ (ch->next)->prev = ch->prev;
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(ch->ifname);
+ free(ch->mac);
+ free(ch);
+ }
+ }
+
+ return 0;
+}