mirror of
https://github.com/sheumann/hush.git
synced 2024-12-21 08:29:45 +00:00
nameif: extended matching (Nico Erfurth <masta@perlgolf.de>)
*: whitespace fixes function old new delta prepend_new_eth_table - 304 +304 nameif_main 620 684 +64 cc_macaddr 51 - -51 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 1/0 up/down: 368/-51) Total: 317 bytes
This commit is contained in:
Denis Vlasenko
parent
fcfb5c04bb
commit
f7be20e70c
@ -549,6 +549,19 @@ config NAMEIF
|
||||
# Comment
|
||||
new_interface_name XX:XX:XX:XX:XX:XX
|
||||
|
||||
config FEATURE_NAMEIF_EXTENDED
|
||||
bool "Extended nameif"
|
||||
default n
|
||||
depends on NAMEIF
|
||||
help
|
||||
This extends the nameif syntax to support the bus_info and driver
|
||||
checks. The syntax is compatible to the normal nameif.
|
||||
File format:
|
||||
new_interface_name driver=asix bus=usb-0000:00:08.2-3
|
||||
new_interface_name bus=usb-0000:00:08.2-3 00:80:C8:38:91:B5
|
||||
new_interface_name mac=00:80:C8:38:91:B5
|
||||
new_interface_name 00:80:C8:38:91:B5
|
||||
|
||||
config NC
|
||||
bool "nc"
|
||||
default n
|
||||
|
||||
@ -13,7 +13,7 @@
|
||||
#include <syslog.h>
|
||||
#include <net/if.h>
|
||||
#include <netinet/ether.h>
|
||||
|
||||
#include <linux/sockios.h>
|
||||
|
||||
/* Older versions of net/if.h do not appear to define IF_NAMESIZE. */
|
||||
#ifndef IF_NAMESIZE
|
||||
@ -34,138 +34,214 @@
|
||||
#define ifr_newname ifr_ifru.ifru_slave
|
||||
#endif
|
||||
|
||||
typedef struct mactable_s {
|
||||
struct mactable_s *next;
|
||||
struct mactable_s *prev;
|
||||
typedef struct ethtable_s {
|
||||
struct ethtable_s *next;
|
||||
struct ethtable_s *prev;
|
||||
char *ifname;
|
||||
struct ether_addr *mac;
|
||||
} mactable_t;
|
||||
#if ENABLE_FEATURE_NAMEIF_EXTENDED
|
||||
char *bus_info;
|
||||
char *driver;
|
||||
#endif
|
||||
} ethtable_t;
|
||||
|
||||
/* Check ascii str_macaddr, convert and copy to *mac */
|
||||
static struct ether_addr *cc_macaddr(const char *str_macaddr)
|
||||
#if ENABLE_FEATURE_NAMEIF_EXTENDED
|
||||
/* Cut'n'paste from ethtool.h */
|
||||
#define ETHTOOL_BUSINFO_LEN 32
|
||||
/* these strings are set to whatever the driver author decides... */
|
||||
struct ethtool_drvinfo {
|
||||
__u32 cmd;
|
||||
char driver[32]; /* driver short name, "tulip", "eepro100" */
|
||||
char version[32]; /* driver version string */
|
||||
char fw_version[32]; /* firmware version string, if applicable */
|
||||
char bus_info[ETHTOOL_BUSINFO_LEN]; /* Bus info for this IF. */
|
||||
/* For PCI devices, use pci_dev->slot_name. */
|
||||
char reserved1[32];
|
||||
char reserved2[16];
|
||||
__u32 n_stats; /* number of u64's from ETHTOOL_GSTATS */
|
||||
__u32 testinfo_len;
|
||||
__u32 eedump_len; /* Size of data from ETHTOOL_GEEPROM (bytes) */
|
||||
__u32 regdump_len; /* Size of data from ETHTOOL_GREGS (bytes) */
|
||||
};
|
||||
#define ETHTOOL_GDRVINFO 0x00000003 /* Get driver info. */
|
||||
#endif
|
||||
|
||||
|
||||
static void nameif_parse_selector(ethtable_t *ch, char *selector)
|
||||
{
|
||||
struct ether_addr *lmac, *mac;
|
||||
struct ether_addr *lmac;
|
||||
#if ENABLE_FEATURE_NAMEIF_EXTENDED
|
||||
int found_selector = 0;
|
||||
|
||||
lmac = ether_aton(str_macaddr);
|
||||
while (*selector) {
|
||||
char *next;
|
||||
#endif
|
||||
selector = skip_whitespace(selector);
|
||||
#if ENABLE_FEATURE_NAMEIF_EXTENDED
|
||||
if (*selector == '\0')
|
||||
break;
|
||||
/* Search for the end .... */
|
||||
next = skip_non_whitespace(selector);
|
||||
if (*next)
|
||||
*next++ = '\0';
|
||||
/* Check for selectors, mac= is assumed */
|
||||
if (strncmp(selector, "bus=", 4) == 0) {
|
||||
ch->bus_info = xstrdup(selector + 4);
|
||||
found_selector++;
|
||||
} else if (strncmp(selector, "driver=", 7) == 0) {
|
||||
ch->driver = xstrdup(selector + 7);
|
||||
found_selector++;
|
||||
} else {
|
||||
#endif
|
||||
lmac = ether_aton(selector + (strncmp(selector, "mac=", 4) == 0 ? 4 : 0));
|
||||
/* Check ascii selector, convert and copy to *mac */
|
||||
if (lmac == NULL)
|
||||
bb_error_msg_and_die("cannot parse MAC %s", str_macaddr);
|
||||
mac = xmalloc(ETH_ALEN);
|
||||
memcpy(mac, lmac, ETH_ALEN);
|
||||
bb_error_msg_and_die("cannot parse %s", selector);
|
||||
ch->mac = xmalloc(ETH_ALEN);
|
||||
memcpy(ch->mac, lmac, ETH_ALEN);
|
||||
#if ENABLE_FEATURE_NAMEIF_EXTENDED
|
||||
found_selector++;
|
||||
};
|
||||
selector = next;
|
||||
}
|
||||
if (found_selector == 0)
|
||||
bb_error_msg_and_die("no selectors found for %s", ch->ifname);
|
||||
#endif
|
||||
}
|
||||
|
||||
return mac;
|
||||
static void prepend_new_eth_table(ethtable_t **clist, char *ifname, char *selector)
|
||||
{
|
||||
ethtable_t *ch;
|
||||
if (strlen(ifname) >= IF_NAMESIZE)
|
||||
bb_error_msg_and_die("interface name '%s' too long", ifname);
|
||||
ch = xzalloc(sizeof(*ch));
|
||||
ch->ifname = ifname;
|
||||
nameif_parse_selector(ch, selector);
|
||||
ch->next = *clist;
|
||||
if (*clist)
|
||||
(*clist)->prev = ch;
|
||||
*clist = ch;
|
||||
}
|
||||
|
||||
int nameif_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
||||
int nameif_main(int argc, char **argv)
|
||||
{
|
||||
mactable_t *clist = NULL;
|
||||
ethtable_t *clist = NULL;
|
||||
FILE *ifh;
|
||||
const char *fname = "/etc/mactab";
|
||||
char *line;
|
||||
char *line_ptr;
|
||||
int linenum;
|
||||
int ctl_sk;
|
||||
int if_index = 1;
|
||||
mactable_t *ch;
|
||||
ethtable_t *ch;
|
||||
|
||||
if (1 & getopt32(argv, "sc:", &fname)) {
|
||||
openlog(applet_name, 0, LOG_LOCAL0);
|
||||
logmode = LOGMODE_SYSLOG;
|
||||
}
|
||||
argc -= optind;
|
||||
argv += optind;
|
||||
|
||||
if ((argc - optind) & 1)
|
||||
if (argc & 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;
|
||||
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 *line_ptr;
|
||||
size_t name_length;
|
||||
char *next;
|
||||
|
||||
line_ptr = line + strspn(line, " \t");
|
||||
line_ptr = skip_whitespace(line);
|
||||
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;
|
||||
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));
|
||||
if_index++;
|
||||
ifr.ifr_ifindex = if_index;
|
||||
strncpy(ifr.ifr_name, line_ptr, sizeof(ifr.ifr_name));
|
||||
|
||||
/* Get ifname by index or die */
|
||||
if (ioctl(ctl_sk, SIOCGIFNAME, &ifr))
|
||||
break;
|
||||
#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);
|
||||
|
||||
/* Has this device hwaddr? */
|
||||
if (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;
|
||||
|
||||
/* 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)
|
||||
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;
|
||||
}
|
||||
/* 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;
|
||||
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;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user