X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fnameif.c;h=5d7e8f9a4472b2ae655cbb0b40f4cb51907dc849;hb=d38ca03946000f0837e9a0e04937499509db54c4;hp=886ff49a8703a4f6f142b939f9502662d1691786;hpb=ab4e19afc66e13b6aac7429fdce95d2aa7cb15ae;p=oweals%2Fbusybox.git diff --git a/networking/nameif.c b/networking/nameif.c index 886ff49a8..5d7e8f9a4 100644 --- a/networking/nameif.c +++ b/networking/nameif.c @@ -1,225 +1,324 @@ -/* +/* vi: set sw=4 ts=4: */ +/* * nameif.c - Naming Interfaces based on MAC address for busybox. * - * Writen 2000 by Andi Kleen. + * Written 2000 by Andi Kleen. * Busybox port 2002 by Nick Fedchik - * Glenn McGrath - * - * 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 + * Glenn McGrath + * Extended matching support 2008 by Nico Erfurth * + * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ - -#include -#include -#include -#include -#include -#include -#include +//config:config NAMEIF +//config: bool "nameif" +//config: default y +//config: select PLATFORM_LINUX +//config: select FEATURE_SYSLOG +//config: help +//config: nameif is used to rename network interface by its MAC address. +//config: Renamed interfaces MUST be in the down state. +//config: It is possible to use a file (default: /etc/mactab) +//config: with list of new interface names and MACs. +//config: Maximum interface name length: IFNAMSIZ = 16 +//config: File fields are separated by space or tab. +//config: File format: +//config: # Comment +//config: new_interface_name XX:XX:XX:XX:XX:XX +//config: +//config:config FEATURE_NAMEIF_EXTENDED +//config: bool "Extended nameif" +//config: default y +//config: depends on NAMEIF +//config: help +//config: This extends the nameif syntax to support the bus_info, driver, +//config: phyaddr selectors. The syntax is compatible to the normal nameif. +//config: File format: +//config: new_interface_name driver=asix bus=usb-0000:00:08.2-3 +//config: new_interface_name bus=usb-0000:00:08.2-3 00:80:C8:38:91:B5 +//config: new_interface_name phy_address=2 00:80:C8:38:91:B5 +//config: new_interface_name mac=00:80:C8:38:91:B5 +//config: new_interface_name 00:80:C8:38:91:B5 + +//usage:#define nameif_trivial_usage +//usage: IF_NOT_FEATURE_NAMEIF_EXTENDED( +//usage: "[-s] [-c FILE] [IFNAME HWADDR]..." +//usage: ) +//usage: IF_FEATURE_NAMEIF_EXTENDED( +//usage: "[-s] [-c FILE] [IFNAME SELECTOR]..." +//usage: ) +//usage:#define nameif_full_usage "\n\n" +//usage: "Rename network interface while it in the down state." +//usage: IF_NOT_FEATURE_NAMEIF_EXTENDED( +//usage: "\nThe device with address HWADDR is renamed to IFACE." +//usage: ) +//usage: IF_FEATURE_NAMEIF_EXTENDED( +//usage: "\nThe device matched by SELECTOR is renamed to IFACE." +//usage: "\nSELECTOR can be a combination of:" +//usage: "\n driver=STRING" +//usage: "\n bus=STRING" +//usage: "\n phy_address=NUM" +//usage: "\n [mac=]XX:XX:XX:XX:XX:XX" +//usage: ) +//usage: "\n" +//usage: "\n -c FILE Configuration file (default: /etc/mactab)" +//usage: "\n -s Log to syslog" +//usage: +//usage:#define nameif_example_usage +//usage: "$ nameif -s dmz0 00:A0:C9:8C:F6:3F\n" +//usage: " or\n" +//usage: "$ nameif -c /etc/my_mactab_file\n" + +#include "libbb.h" +#include #include #include +#include -#include "busybox.h" +#ifndef IFNAMSIZ +#define IFNAMSIZ 16 +#endif -/* take from linux/sockios.h */ -#define SIOCSIFNAME 0x8923 /* set interface name */ +/* Taken from linux/sockios.h */ +#define SIOCSIFNAME 0x8923 /* set interface name */ -/* Octets in one ethernet addr, from */ -#define ETH_ALEN 6 +/* Octets in one Ethernet addr, from */ +#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; +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; + int32_t phy_address; +#endif +} ethtable_t; + +#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 { + uint32_t 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]; + uint32_t n_stats; /* number of u64's from ETHTOOL_GSTATS */ + uint32_t testinfo_len; + uint32_t eedump_len; /* Size of data from ETHTOOL_GEEPROM (bytes) */ + uint32_t regdump_len; /* Size of data from ETHTOOL_GREGS (bytes) */ +}; + +struct ethtool_cmd { + uint32_t cmd; + uint32_t supported; /* Features this interface supports */ + uint32_t advertising; /* Features this interface advertises */ + uint16_t speed; /* The forced speed, 10Mb, 100Mb, gigabit */ + uint8_t duplex; /* Duplex, half or full */ + uint8_t port; /* Which connector port */ + uint8_t phy_address; + uint8_t transceiver; /* Which transceiver to use */ + uint8_t autoneg; /* Enable or disable autonegotiation */ + uint32_t maxtxpkt; /* Tx pkts before generating tx int */ + uint32_t maxrxpkt; /* Rx pkts before generating rx int */ + uint16_t speed_hi; + uint16_t reserved2; + uint32_t reserved[3]; +}; + +#define ETHTOOL_GSET 0x00000001 /* Get settings. */ +#define ETHTOOL_GDRVINFO 0x00000003 /* Get driver info. */ +#endif -static void serror(const char use_syslog, const char *s, ...) -{ - va_list ap; - va_start(ap, s); +static void nameif_parse_selector(ethtable_t *ch, char *selector) +{ + struct ether_addr *lmac; +#if ENABLE_FEATURE_NAMEIF_EXTENDED + int found_selector = 0; - if (use_syslog) { - openlog("nameif", 0, LOG_LOCAL0); - syslog(LOG_ERR, s, ap); - closelog(); - } else { - vfprintf(stderr, s, ap); - putc('\n', stderr); + while (*selector) { + char *next; +#endif + selector = skip_whitespace(selector); +#if ENABLE_FEATURE_NAMEIF_EXTENDED + ch->phy_address = -1; + 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 if (strncmp(selector, "phyaddr=", 8) == 0) { + ch->phy_address = xatoi_positive(selector + 8); + found_selector++; + } else { +#endif + lmac = xmalloc(ETH_ALEN); + ch->mac = ether_aton_r(selector + (strncmp(selector, "mac=", 4) != 0 ? 0 : 4), lmac); + if (ch->mac == NULL) + bb_error_msg_and_die("can't parse %s", selector); +#if ENABLE_FEATURE_NAMEIF_EXTENDED + found_selector++; + }; + selector = next; } - - va_end(ap); - - exit(EXIT_FAILURE); + if (found_selector == 0) + bb_error_msg_and_die("no selectors found for %s", ch->ifname); +#endif } -/* Check ascii str_macaddr, convert and copy to *mac */ -struct ether_addr *cc_macaddr(char *str_macaddr, unsigned char use_syslog) +static void prepend_new_eth_table(ethtable_t **clist, char *ifname, char *selector) { - 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; + ethtable_t *ch; + if (strlen(ifname) >= IFNAMSIZ) + bb_error_msg_and_die("interface name '%s' too long", ifname); + ch = xzalloc(sizeof(*ch)); + ch->ifname = xstrdup(ifname); + nameif_parse_selector(ch, selector); + ch->next = *clist; + if (*clist) + (*clist)->prev = ch; + *clist = ch; } -int nameif_main(int argc, char **argv) +#if ENABLE_FEATURE_CLEAN_UP +static void delete_eth_table(ethtable_t *ch) { - mactable_t *clist = NULL; - FILE *ifh; - char *fname = "/etc/mactab"; - char *line; - 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'}, - {"configfile", 1, NULL, 'c'}, - {NULL}, - }; + free(ch->ifname); +#if ENABLE_FEATURE_NAMEIF_EXTENDED + free(ch->bus_info); + free(ch->driver); +#endif + free(ch->mac); + free(ch); +}; +#else +void delete_eth_table(ethtable_t *ch); +#endif - 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(); - } +int nameif_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +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; } - - if ((argc - optind) & 1) - show_usage(); - - if (optind < argc) { - while (optind < argc) { - - if (strlen(argv[optind]) > IF_NAMESIZE) - serror(use_syslog, "interface name `%s' too long", - argv[optind]); - optind++; - - ch = xcalloc(1, sizeof(mactable_t)); - ch->next = NULL; - ch->prev = NULL; - ch->ifname = strdup(argv[optind - 1]); - ch->mac = cc_macaddr(argv[optind], use_syslog); - optind++; - if (clist) - clist->prev = ch->next; - ch->next = clist; - ch->prev = clist; - clist = ch; - } + 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 { - ifh = xfopen(fname, "r"); - - while ((line = get_line_from_file(ifh)) != NULL) { - 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(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'; - ch->mac = cc_macaddr(line_ptr, use_syslog); - if (clist) - clist->prev = ch; - ch->next = clist; - clist = ch; - free(line); - } - fclose(ifh); + 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); } - if ((ctl_sk = socket(PF_INET, SOCK_DGRAM, 0)) == -1) - serror(use_syslog, "socket: %s", strerror(errno)); + ctl_sk = xsocket(PF_INET, SOCK_DGRAM, 0); + parser = config_open2("/proc/net/dev", xfopen_for_read); - while (clist) { + 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); - bzero(&ifr, sizeof(struct ifreq)); - if_index++; - ifr.ifr_ifindex = if_index; - - /* Get ifname by index or die */ - if (ioctl(ctl_sk, SIOCGIFNAME, &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; - - /* 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) + } + /* Nothing found for current interface */ + if (!ch) continue; - strcpy(ifr.ifr_newname, ch->ifname); - if (ioctl(ctl_sk, SIOCSIFNAME, &ifr) < 0) - serror(use_syslog, "cannot change ifname %s to %s: %s", - ifr.ifr_name, ch->ifname, strerror(errno)); - + 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 { + if (ch->prev != NULL) + ch->prev->next = ch->next; + else clist = ch->next; - } if (ch->next != NULL) - (ch->next)->prev = ch->prev; - free(ch); - } - - while (clist) { - ch = clist; - clist = clist->next; - free(ch); + 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; }