Correcting branch name to be like previous ones

1 files changed, 170 insertions, 0 deletions

diff --git a/networking/nameif.c b/networking/nameif.c
new file mode 100644
index 000000000..52aad2873
--- /dev/null
+++ b/networking/nameif.c
@@ -0,0 +1,170 @@
+/* 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)
+{
+        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;
+}