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Diffstat (limited to 'networking/nameif.c')
-rw-r--r--networking/nameif.c132
1 files changed, 68 insertions, 64 deletions
diff --git a/networking/nameif.c b/networking/nameif.c
index 4b2d090ca..a9d422110 100644
--- a/networking/nameif.c
+++ b/networking/nameif.c
@@ -22,21 +22,20 @@
*
*/
+
#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 <linux/sockios.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
@@ -46,12 +45,12 @@
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 void serror(const char use_syslog, const char *s, ...)
{
va_list ap;
@@ -67,20 +66,35 @@ static void serror_msg_and_die(const char use_syslog, const char *s, ...)
}
va_end(ap);
-
+
exit(EXIT_FAILURE);
}
+/* Check ascii str_macaddr, convert and copy to *mac */
+struct ether_addr *cc_macaddr(char *str_macaddr, unsigned char use_syslog)
+{
+ struct ether_addr *lmac, *mac;
+
+ lmac = ether_aton(str_macaddr);
+ if (lmac == NULL)
+ serror(use_syslog, "cannot parse MAC %s", str_macaddr);
+ mac = xcalloc(1, 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";
char *line;
- unsigned short linenum = 0;
unsigned char use_syslog = 0;
int ctl_sk = -1;
int opt;
+ int if_index = 1;
+ mactable_t *ch = NULL;
static struct option opts[] = {
{"syslog", 0, NULL, 's'},
@@ -101,40 +115,33 @@ int nameif_main(int argc, char **argv)
}
}
- if ((argc - optind) & 1) {
+ 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]);
- }
+ if (strlen(argv[optind]) > IF_NAMESIZE)
+ serror(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->next = NULL;
+ ch->prev = NULL;
ch->ifname = strdup(argv[optind - 1]);
- ch->mac = xcalloc(1, ETH_ALEN);
- memcpy(ch->mac, mac, ETH_ALEN);
+ ch->mac = cc_macaddr(argv[optind], use_syslog);
optind++;
if (clist)
- clist->pprev = &ch->next;
+ clist->prev = ch->next;
ch->next = clist;
- ch->pprev = &clist;
+ ch->prev = 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;
@@ -142,74 +149,71 @@ int nameif_main(int argc, char **argv)
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]);
- }
+ if (name_length > IF_NAMESIZE)
+ serror(use_syslog, "interface name `%s' too long",
+ argv[optind]);
ch = xcalloc(1, sizeof(mactable_t));
+ ch->next = NULL;
+ ch->prev = NULL;
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);
+ ch->mac = cc_macaddr(line_ptr, use_syslog);
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(use_syslog, "socket: %s", strerror(errno));
+
+ 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')
- 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(use_syslog, "cannot read hardware address of %s: %s", ifr.ifr_name, strerror(errno));
+ 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;
- }
+
+ /* 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));
+ if (ioctl(ctl_sk, SIOCSIFNAME, &ifr) < 0)
+ serror(use_syslog, "cannot change ifname %s to %s: %s",
+ ifr.ifr_name, ch->ifname, strerror(errno));
+
+ /* Remove list entry of renamed interface */
+ if (ch->prev != NULL) {
+ (ch->prev)->next = ch->next;
+ } else {
+ clist = ch->next;
}
- *ch->pprev = ch->next;
+ if (ch->next != NULL)
+ (ch->next)->prev = ch->prev;
free(ch);
- free(line);
}
- fclose(ifh);
while (clist) {
- mactable_t *ch;
-
ch = clist;
clist = clist->next;
free(ch);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 10:14:52 +0000