int nameif_main(int argc, char **argv)
{
ethtable_t *clist = NULL;
FILE *ifh;
const char *fname = "/etc/mactab";
char *line;
char *line_ptr;
int linenum;
int ctl_sk;
ethtable_t *ch;
if (1 & getopt32(argv, "sc:", &fname)) {
openlog(applet_name, 0, LOG_LOCAL0);
logmode = LOGMODE_SYSLOG;
}
argc -= optind;
argv += optind;
if (argc & 1)
bb_show_usage();
if (argc) {
while (*argv) {
char *ifname = xstrdup(*argv++);
prepend_new_eth_table(&clist, ifname, *argv++);
}
} else {
ifh = xfopen(fname, "r");
while ((line = xmalloc_fgets(ifh)) != NULL) {
char *next;
line_ptr = skip_whitespace(line);
if ((line_ptr[0] == '#') || (line_ptr[0] == '\n')) {
free(line);
continue;
}
next = skip_non_whitespace(line_ptr);
if (*next)
*next++ = '\0';
prepend_new_eth_table(&clist, line_ptr, next);
free(line);
}
fclose(ifh);
}
ctl_sk = xsocket(PF_INET, SOCK_DGRAM, 0);
ifh = xfopen("/proc/net/dev", "r");
linenum = 0;
while (clist) {
struct ifreq ifr;
#if ENABLE_FEATURE_NAMEIF_EXTENDED
struct ethtool_drvinfo drvinfo;
#endif
line = xmalloc_fgets(ifh);
if (line == NULL)
break; /* Seems like we're done */
if (linenum++ < 2 )
goto next_line; /* Skip the first two lines */
/* Find the current interface name and copy it to ifr.ifr_name */
line_ptr = skip_whitespace(line);
*skip_non_whitespace(line_ptr) = '\0';
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifr.ifr_name, line_ptr, sizeof(ifr.ifr_name));
#if ENABLE_FEATURE_NAMEIF_EXTENDED
/* Check for driver etc. */
memset(&drvinfo, 0, sizeof(struct ethtool_drvinfo));
drvinfo.cmd = ETHTOOL_GDRVINFO;
ifr.ifr_data = (caddr_t) &drvinfo;
/* Get driver and businfo first, so we have it in drvinfo */
ioctl(ctl_sk, SIOCETHTOOL, &ifr);
#endif
ioctl(ctl_sk, SIOCGIFHWADDR, &ifr);
/* Search the list for a matching device */
for (ch = clist; ch; ch = ch->next) {
#if ENABLE_FEATURE_NAMEIF_EXTENDED
if (ch->bus_info && strcmp(ch->bus_info, drvinfo.bus_info) != 0)
continue;
if (ch->driver && strcmp(ch->driver, drvinfo.driver) != 0)
continue;
#endif
if (ch->mac && memcmp(ch->mac, ifr.ifr_hwaddr.sa_data, ETH_ALEN) != 0)
continue;
/* if we came here, all selectors have matched */
goto found;
}
/* Nothing found for current interface */
goto next_line;
found:
if (strcmp(ifr.ifr_name, ch->ifname) != 0) {
strcpy(ifr.ifr_newname, ch->ifname);
ioctl_or_perror_and_die(ctl_sk, SIOCSIFNAME, &ifr,
"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);
}
next_line:
free(line);
}
if (ENABLE_FEATURE_CLEAN_UP) {
fclose(ifh);
};
return 0;
}
int nameif_main(int argc UNUSED_PARAM, char **argv)
{
ethtable_t *clist = NULL;
const char *fname = "/etc/mactab";
int ctl_sk;
ethtable_t *ch;
parser_t *parser;
char *token[2];
if (1 & getopt32(argv, "sc:", &fname)) {
openlog(applet_name, 0, LOG_LOCAL0);
/* Why not just "="? I assume logging to stderr
* can't hurt. 2>/dev/null if you don't like it: */
logmode |= LOGMODE_SYSLOG;
}
argv += optind;
if (argv[0]) {
do {
if (!argv[1])
bb_show_usage();
prepend_new_eth_table(&clist, argv[0], argv[1]);
argv += 2;
} while (*argv);
} else {
parser = config_open(fname);
while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL))
prepend_new_eth_table(&clist, token[0], token[1]);
config_close(parser);
}
ctl_sk = xsocket(PF_INET, SOCK_DGRAM, 0);
parser = config_open2("/proc/net/dev", xfopen_for_read);
while (clist && config_read(parser, token, 2, 2, "\0: \t", PARSE_NORMAL)) {
struct ifreq ifr;
#if ENABLE_FEATURE_NAMEIF_EXTENDED
struct ethtool_drvinfo drvinfo;
struct ethtool_cmd eth_settings;
#endif
if (parser->lineno <= 2)
continue; /* Skip the first two lines */
/* Find the current interface name and copy it to ifr.ifr_name */
memset(&ifr, 0, sizeof(struct ifreq));
strncpy_IFNAMSIZ(ifr.ifr_name, token[0]);
#if ENABLE_FEATURE_NAMEIF_EXTENDED
/* Check for phy address */
memset(ð_settings, 0, sizeof(eth_settings));
eth_settings.cmd = ETHTOOL_GSET;
ifr.ifr_data = (caddr_t) ð_settings;
ioctl(ctl_sk, SIOCETHTOOL, &ifr);
/* Check for driver etc. */
memset(&drvinfo, 0, sizeof(drvinfo));
drvinfo.cmd = ETHTOOL_GDRVINFO;
ifr.ifr_data = (caddr_t) &drvinfo;
/* Get driver and businfo first, so we have it in drvinfo */
ioctl(ctl_sk, SIOCETHTOOL, &ifr);
#endif
ioctl(ctl_sk, SIOCGIFHWADDR, &ifr);
/* Search the list for a matching device */
for (ch = clist; ch; ch = ch->next) {
#if ENABLE_FEATURE_NAMEIF_EXTENDED
if (ch->bus_info && strcmp(ch->bus_info, drvinfo.bus_info) != 0)
continue;
if (ch->driver && strcmp(ch->driver, drvinfo.driver) != 0)
continue;
if (ch->phy_address != -1 && ch->phy_address != eth_settings.phy_address)
continue;
#endif
if (ch->mac && memcmp(ch->mac, ifr.ifr_hwaddr.sa_data, ETH_ALEN) != 0)
continue;
/* if we came here, all selectors have matched */
break;
}
/* Nothing found for current interface */
if (!ch)
continue;
if (strcmp(ifr.ifr_name, ch->ifname) != 0) {
strcpy(ifr.ifr_newname, ch->ifname);
ioctl_or_perror_and_die(ctl_sk, SIOCSIFNAME, &ifr,
"can't 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)
delete_eth_table(ch);
}
if (ENABLE_FEATURE_CLEAN_UP) {
for (ch = clist; ch; ch = ch->next)
delete_eth_table(ch);
config_close(parser);
};
return 0;
}
