X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fnameif.c;h=5d7e8f9a4472b2ae655cbb0b40f4cb51907dc849;hb=d38ca03946000f0837e9a0e04937499509db54c4;hp=f0b8d11b0871df45f0253443dc1c9dd8f8150ff6;hpb=3f9c84857617b0cf0d1824664e371fb6a4cac2e3;p=oweals%2Fbusybox.git diff --git a/networking/nameif.c b/networking/nameif.c index f0b8d11b0..5d7e8f9a4 100644 --- a/networking/nameif.c +++ b/networking/nameif.c @@ -5,30 +5,85 @@ * Written 2000 by Andi Kleen. * Busybox port 2002 by Nick Fedchik * Glenn McGrath + * Extended matching support 2008 by Nico Erfurth * - * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. + * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ +//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 -/* 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 +#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 +#define ETH_ALEN 6 #ifndef ifr_newname #define ifr_newname ifr_ifru.ifru_slave @@ -42,6 +97,7 @@ typedef struct ethtable_s { #if ENABLE_FEATURE_NAMEIF_EXTENDED char *bus_info; char *driver; + int32_t phy_address; #endif } ethtable_t; @@ -55,7 +111,7 @@ struct ethtool_drvinfo { 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. */ + /* 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 */ @@ -63,6 +119,25 @@ struct ethtool_drvinfo { 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 @@ -78,6 +153,7 @@ static void nameif_parse_selector(ethtable_t *ch, char *selector) #endif selector = skip_whitespace(selector); #if ENABLE_FEATURE_NAMEIF_EXTENDED + ch->phy_address = -1; if (*selector == '\0') break; /* Search for the end .... */ @@ -91,14 +167,15 @@ static void nameif_parse_selector(ethtable_t *ch, char *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 = 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 %s", selector); - ch->mac = xmalloc(ETH_ALEN); - memcpy(ch->mac, lmac, ETH_ALEN); + 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++; }; @@ -112,10 +189,10 @@ static void nameif_parse_selector(ethtable_t *ch, char *selector) static void prepend_new_eth_table(ethtable_t **clist, char *ifname, char *selector) { ethtable_t *ch; - if (strlen(ifname) >= IF_NAMESIZE) + if (strlen(ifname) >= IFNAMSIZ) bb_error_msg_and_die("interface name '%s' too long", ifname); ch = xzalloc(sizeof(*ch)); - ch->ifname = ifname; + ch->ifname = xstrdup(ifname); nameif_parse_selector(ch, selector); ch->next = *clist; if (*clist) @@ -123,78 +200,78 @@ static void prepend_new_eth_table(ethtable_t **clist, char *ifname, char *select *clist = ch; } +#if ENABLE_FEATURE_CLEAN_UP +static void delete_eth_table(ethtable_t *ch) +{ + 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 + int nameif_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int nameif_main(int argc, char **argv) +int nameif_main(int argc UNUSED_PARAM, 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; + parser_t *parser; + char *token[2]; if (1 & getopt32(argv, "sc:", &fname)) { openlog(applet_name, 0, LOG_LOCAL0); - logmode = LOGMODE_SYSLOG; + /* Why not just "="? I assume logging to stderr + * can't hurt. 2>/dev/null if you don't like it: */ + 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++); - } + 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 = 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); + 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); - ifh = xfopen("/proc/net/dev", "r"); + parser = config_open2("/proc/net/dev", xfopen_for_read); - linenum = 0; - 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 - - line = xmalloc_fgets(ifh); - if (line == NULL) - break; /* Seems like we're done */ - if (linenum++ < 2 ) - goto next_line; /* Skip the first two lines */ + if (parser->lineno <= 2) + continue; /* 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)); + 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(struct ethtool_drvinfo)); + 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 */ @@ -209,19 +286,22 @@ int nameif_main(int argc, char **argv) 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 */ - goto found; + break; } /* Nothing found for current interface */ - goto next_line; - found: + 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, - "cannot change ifname %s to %s", + "can't change ifname %s to %s", ifr.ifr_name, ch->ifname); } /* Remove list entry of renamed interface */ @@ -231,16 +311,13 @@ int nameif_main(int argc, char **argv) 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) + delete_eth_table(ch); } if (ENABLE_FEATURE_CLEAN_UP) { - fclose(ifh); + for (ch = clist; ch; ch = ch->next) + delete_eth_table(ch); + config_close(parser); }; return 0;