New applet, nameif by Nick Fedchik and myself.

git-svn-id: svn://busybox.net/trunk/busybox@6203 69ca8d6d-28ef-0310-b511-8ec308f3f277

5 files changed, 248 insertions, 0 deletions

diff --git a/include/applets.h b/include/applets.h
index 9257fc940..bd2053039 100644
--- a/include/applets.h
+++ b/include/applets.h
@@ -368,6 +368,9 @@
 #ifdef CONFIG_MV
         APPLET(mv, mv_main, _BB_DIR_BIN, _BB_SUID_NEVER)
 #endif
+#ifdef CONFIG_NAMEIF
+        APPLET(nameif, nameif_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
+#endif
 #ifdef CONFIG_NC
         APPLET(nc, nc_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
 #endif
diff --git a/include/usage.h b/include/usage.h
index f484ee9ef..d3c1e5072 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -1453,6 +1453,19 @@
 #define mv_example_usage \
         "$ mv /tmp/foo /bin/bar\n" 
 
+#define nameif_trivial_usage \
+        "[OPTIONS] [{IFNAME MACADDR}]"
+#define nameif_full_usage \
+                "Nameif renaming network interface while it in the down state.\n\n" \
+                "Options:\n" \
+                "\t-c FILE\t\tUse another configuration file (default is /etc/mactab)\n" \
+                "\t-s\t\tUse syslog (LOCAL0 facility).\n" \
+                "\tIFNAME MACADDR\tnew_interface_name interface_mac_address\n" 
+#define nameif_example_usage \
+                "$ nameif -s dmz0 00:A0:C9:8C:F6:3F\n" \
+                " or\n" \
+                "$ nameif -c /etc/my_mactab_file\n" \
+
 #define nc_trivial_usage \
         "[OPTIONS] [IP] [port]" 
 #define nc_full_usage \
diff --git a/networking/Config.in b/networking/Config.in
index 92467b748..b4b9462c3 100644
--- a/networking/Config.in
+++ b/networking/Config.in
@@ -192,6 +192,20 @@ config CONFIG_IPTUNNEL
         help
           Please submit a patch to add help text for this item.
 
+config CONFIG_NAMEIF
+        bool "nameif"
+        default n
+        help
+          nameif used to rename network interface by its MAC address.
+          Renamed interfaces MUST be in the down state.
+          It is possible to use file (default: /etc/mactab)
+          with list of new interface names and MACs.
+          Maximum interface name length: IF_NAMESIZE = 16
+          File fields are sepatated by space or tab.
+          File format:
+          # Comment
+          new_interface_name    XX:XX:XX:XX:XX:XX
+
 config CONFIG_NC
         bool "nc"
         default n
diff --git a/networking/Makefile.in b/networking/Makefile.in
index fc6a3b7e0..e72b00194 100644
--- a/networking/Makefile.in
+++ b/networking/Makefile.in
@@ -32,6 +32,7 @@ NETWORKING-$(CONFIG_IPADDR)		+= ipaddr.o
 NETWORKING-$(CONFIG_IPLINK)             += iplink.o
 NETWORKING-$(CONFIG_IPROUTE)    += iproute.o
 NETWORKING-$(CONFIG_IPTUNNEL)   += iptunnel.o
+NETWORKING-$(CONFIG_NAMEIF)     += nameif.o
 NETWORKING-$(CONFIG_NC)             += nc.o
 NETWORKING-$(CONFIG_NETSTAT)    += netstat.o
 NETWORKING-$(CONFIG_NSLOOKUP)   += nslookup.o
diff --git a/networking/nameif.c b/networking/nameif.c
new file mode 100644
index 000000000..1edd64111
--- /dev/null
+++ b/networking/nameif.c
@@ -0,0 +1,217 @@
+/* 
+ * 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;
+}