-/*
+/*
* nameif.c - Naming Interfaces based on MAC address for busybox.
*
- * Writen 2000 by Andi Kleen.
+ * Written 2000 by Andi Kleen.
* Busybox port 2002 by Nick Fedchik <nick@fedchik.org.ua>
- * Glenn McGrath <bug1@optushome.com.au>
+ * Glenn McGrath <bug1@iinet.net.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
*
*/
+
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
-
#include <errno.h>
#include <getopt.h>
#include <stdlib.h>
#include "busybox.h"
-/* set interface name, from <linux/sockios.h> */
-#define SIOCSIFNAME 0x8923
-/* Octets in one ethernet addr, from <linux/if_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
typedef struct mactable_s {
struct mactable_s *next;
- struct mactable_s **pprev;
+ struct mactable_s *prev;
char *ifname;
struct ether_addr *mac;
} mactable_t;
-static void serror_msg_and_die(const char use_syslog, const char *s, ...)
+static unsigned char use_syslog;
+
+static void serror(const char *s, ...) __attribute__ ((noreturn));
+
+static void serror(const char *s, ...)
{
va_list ap;
va_start(ap, s);
if (use_syslog) {
- openlog("nameif", 0, LOG_LOCAL0);
- syslog(LOG_ERR, s, ap);
+ openlog(bb_applet_name, 0, LOG_LOCAL0);
+ vsyslog(LOG_ERR, s, ap);
closelog();
} else {
- vfprintf(stderr, s, ap);
+ bb_verror_msg(s, ap);
putc('\n', stderr);
}
exit(EXIT_FAILURE);
}
+/* Check ascii str_macaddr, convert and copy to *mac */
+struct ether_addr *cc_macaddr(char *str_macaddr)
+{
+ struct ether_addr *lmac, *mac;
+
+ lmac = ether_aton(str_macaddr);
+ if (lmac == NULL)
+ serror("cannot parse MAC %s", str_macaddr);
+ mac = xmalloc(ETH_ALEN);
+ memcpy(mac, lmac, ETH_ALEN);
+
+ return mac;
+}
+
int nameif_main(int argc, char **argv)
{
mactable_t *clist = NULL;
FILE *ifh;
- char *fname = "/etc/mactab";
+ const char *fname = "/etc/mactab";
char *line;
- unsigned short linenum = 0;
- unsigned char use_syslog = 0;
- int ctl_sk = -1;
+ int ctl_sk;
int opt;
+ int if_index = 1;
+ mactable_t *ch;
- static struct option opts[] = {
- {"syslog", 0, NULL, 's'},
- {"configfile", 1, NULL, 'c'},
- {NULL},
- };
- while ((opt = getopt_long(argc, argv, "c:s", opts, NULL)) != -1) {
+ while ((opt = getopt(argc, argv, "c:s")) != -1) {
switch (opt) {
case 'c':
fname = optarg;
use_syslog = 1;
break;
default:
- show_usage();
+ bb_show_usage();
}
}
- if ((argc - optind) & 1) {
- show_usage();
- }
+ if ((argc - optind) & 1)
+ bb_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]);
- }
+ char **a = argv + optind;
+
+ while (*a) {
+
+ if (strlen(*a) > IF_NAMESIZE)
+ serror("interface name `%s' too long", *a);
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++;
+ ch->ifname = bb_xstrdup(*a++);
+ ch->mac = cc_macaddr(*a++);
if (clist)
- clist->pprev = &ch->next;
+ clist->prev = ch;
ch->next = clist;
- ch->pprev = &clist;
clist = ch;
}
} else {
- ifh = xfopen(fname, "r");
+ ifh = bb_xfopen(fname, "r");
- while ((line = get_line_from_file(ifh)) != NULL) {
- struct ether_addr *mac;
- mactable_t *ch;
+ while ((line = bb_get_line_from_file(ifh)) != NULL) {
char *line_ptr;
- unsigned short name_length;
+ size_t 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);
+ ch->ifname = bb_xstrndup(line_ptr, name_length);
+ if (name_length > IF_NAMESIZE)
+ serror("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';
- 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);
+ ch->mac = cc_macaddr(line_ptr);
if (clist)
- clist->pprev = &ch->next;
+ clist->prev = ch;
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;
+ if ((ctl_sk = socket(PF_INET, SOCK_DGRAM, 0)) == -1)
+ serror("socket: %m");
+
+ while (clist) {
struct ifreq ifr;
- mactable_t *ch = NULL;
- linenum++;
- if (linenum < 3)
- continue;
- line_ptr = line + strspn(line, " \t");
- if (line_ptr[0] == '\n')
+ bzero(&ifr, 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;
- 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));
- }
+
+ /* 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;
- if (ch == NULL) {
+
+ /* 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) {;
- serror_msg_and_die(use_syslog, "cannot change name of %s to %s: %s", ifr.ifr_name, ch->ifname, strerror(errno));
+ strcpy(ifr.ifr_newname, ch->ifname);
+ if (ioctl(ctl_sk, SIOCSIFNAME, &ifr) < 0)
+ serror("cannot change ifname %s to %s: %m",
+ ifr.ifr_name, ch->ifname);
+
+ /* Remove list entry of renamed interface */
+ if (ch->prev != NULL) {
+ (ch->prev)->next = ch->next;
+ } else {
+ clist = ch->next;
}
- *ch->pprev = ch->next;
- free(ch);
- free(line);
- }
- fclose(ifh);
-
- while (clist) {
- mactable_t *ch;
-
- ch = clist;
- clist = clist->next;
+ if (ch->next != NULL)
+ (ch->next)->prev = ch->prev;
+#ifdef CONFIG_FEATURE_CLEAN_UP
+ free(ch->ifname);
+ free(ch->mac);
free(ch);
+#endif
}
return 0;
projects / oweals / busybox.git / blobdiff