X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fifconfig.c;h=b6604f5d15a0e4ff2bf1677f57208b187466afb7;hb=a38f9faa9fa230eb3753381c4f626acf029379fb;hp=2134f8a48e2b33287cb00db733cbf02b75ce4080;hpb=ec455953008d08f588fe0c0bd9df4278cd188315;p=oweals%2Fbusybox.git diff --git a/networking/ifconfig.c b/networking/ifconfig.c index 2134f8a48..b6604f5d1 100644 --- a/networking/ifconfig.c +++ b/networking/ifconfig.c @@ -1,3 +1,4 @@ +/* vi: set sw=4 ts=4: */ /* ifconfig * * Similar to the standard Unix ifconfig, but with only the necessary @@ -6,471 +7,548 @@ * Bjorn Wesen, Axis Communications AB * * - * Authors of the original ifconfig was: + * Authors of the original ifconfig was: * Fred N. van Kempen, * - * 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. + * Licensed under GPLv2 or later, see file LICENSE in this source tree. + */ + +/* + * Heavily modified by Manuel Novoa III Mar 6, 2001 + * + * From initial port to busybox, removed most of the redundancy by + * converting to a table-driven approach. Added several (optional) + * args missing from initial port. * - * $Id: ifconfig.c,v 1.1 2001/02/14 08:11:27 andersen Exp $ + * Still missing: media, tunnel. * + * 2002-04-20 + * IPV6 support added by Bart Visscher */ -#include "busybox.h" -#include -#include -#include -#include -#include // strcmp and friends -#include // isdigit and friends -#include -#include -#include -#include +//usage:#define ifconfig_trivial_usage +//usage: IF_FEATURE_IFCONFIG_STATUS("[-a]") " interface [address]" +//usage:#define ifconfig_full_usage "\n\n" +//usage: "Configure a network interface\n" +//usage: "\n" +//usage: IF_FEATURE_IPV6( +//usage: " [add ADDRESS[/PREFIXLEN]]\n") +//usage: IF_FEATURE_IPV6( +//usage: " [del ADDRESS[/PREFIXLEN]]\n") +//usage: " [[-]broadcast [ADDRESS]] [[-]pointopoint [ADDRESS]]\n" +//usage: " [netmask ADDRESS] [dstaddr ADDRESS]\n" +//usage: IF_FEATURE_IFCONFIG_SLIP( +//usage: " [outfill NN] [keepalive NN]\n") +//usage: " " IF_FEATURE_IFCONFIG_HW("[hw ether" IF_FEATURE_HWIB("|infiniband")" ADDRESS] ") "[metric NN] [mtu NN]\n" +//usage: " [[-]trailers] [[-]arp] [[-]allmulti]\n" +//usage: " [multicast] [[-]promisc] [txqueuelen NN] [[-]dynamic]\n" +//usage: IF_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ( +//usage: " [mem_start NN] [io_addr NN] [irq NN]\n") +//usage: " [up|down] ..." + +#include "libbb.h" +#include "inet_common.h" #include #include -#include +#include +#ifdef HAVE_NET_ETHERNET_H +# include +#endif -static int sockfd; /* socket fd we use to manipulate stuff with */ +#if ENABLE_FEATURE_IFCONFIG_SLIP +# include +#endif -/* print usage and exit */ +/* I don't know if this is needed for busybox or not. Anyone? */ +#define QUESTIONABLE_ALIAS_CASE -#define _(x) x -/* Set a certain interface flag. */ -static int -set_flag(char *ifname, short flag) -{ - struct ifreq ifr; - - strcpy(ifr.ifr_name, ifname); - if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) { - perror("SIOCGIFFLAGS"); - return (-1); - } - strcpy(ifr.ifr_name, ifname); - ifr.ifr_flags |= flag; - if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) { - perror("SIOCSIFFLAGS"); - return -1; - } - return (0); -} +/* Defines for glibc2.0 users. */ +#ifndef SIOCSIFTXQLEN +# define SIOCSIFTXQLEN 0x8943 +# define SIOCGIFTXQLEN 0x8942 +#endif +/* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */ +#ifndef ifr_qlen +# define ifr_qlen ifr_ifru.ifru_mtu +#endif -/* Clear a certain interface flag. */ -static int -clr_flag(char *ifname, short flag) -{ - struct ifreq ifr; - - strcpy(ifr.ifr_name, ifname); - if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) { - perror("SIOCGIFFLAGS"); - return -1; - } - strcpy(ifr.ifr_name, ifname); - ifr.ifr_flags &= ~flag; - if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) { - perror("SIOCSIFFLAGS"); - return -1; - } - return (0); -} +#ifndef IFF_DYNAMIC +# define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */ +#endif -/* resolve XXX.YYY.ZZZ.QQQ -> binary */ +#if ENABLE_FEATURE_IPV6 +struct in6_ifreq { + struct in6_addr ifr6_addr; + uint32_t ifr6_prefixlen; + int ifr6_ifindex; +}; +#endif -static int -INET_resolve(char *name, struct sockaddr_in *sin) -{ - sin->sin_family = AF_INET; - sin->sin_port = 0; +/* + * Here are the bit masks for the "flags" member of struct options below. + * N_ signifies no arg prefix; M_ signifies arg prefixed by '-'. + * CLR clears the flag; SET sets the flag; ARG signifies (optional) arg. + */ +#define N_CLR 0x01 +#define M_CLR 0x02 +#define N_SET 0x04 +#define M_SET 0x08 +#define N_ARG 0x10 +#define M_ARG 0x20 + +#define M_MASK (M_CLR | M_SET | M_ARG) +#define N_MASK (N_CLR | N_SET | N_ARG) +#define SET_MASK (N_SET | M_SET) +#define CLR_MASK (N_CLR | M_CLR) +#define SET_CLR_MASK (SET_MASK | CLR_MASK) +#define ARG_MASK (M_ARG | N_ARG) + +/* + * Here are the bit masks for the "arg_flags" member of struct options below. + */ - /* Default is special, meaning 0.0.0.0. */ - if (!strcmp(name, "default")) { - sin->sin_addr.s_addr = INADDR_ANY; - return (1); - } - /* Look to see if it's a dotted quad. */ - if (inet_aton(name, &sin->sin_addr)) { - return 0; - } - /* guess not.. */ - return -1; -} +/* + * cast type: + * 00 int + * 01 char * + * 02 HOST_COPY in_ether + * 03 HOST_COPY INET_resolve + */ +#define A_CAST_TYPE 0x03 +/* + * map type: + * 00 not a map type (mem_start, io_addr, irq) + * 04 memstart (unsigned long) + * 08 io_addr (unsigned short) + * 0C irq (unsigned char) + */ +#define A_MAP_TYPE 0x0C +#define A_ARG_REQ 0x10 /* Set if an arg is required. */ +#define A_NETMASK 0x20 /* Set if netmask (check for multiple sets). */ +#define A_SET_AFTER 0x40 /* Set a flag at the end. */ +#define A_COLON_CHK 0x80 /* Is this needed? See below. */ +#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS +#define A_HOSTNAME 0x100 /* Set if it is ip addr. */ +#define A_BROADCAST 0x200 /* Set if it is broadcast addr. */ +#else +#define A_HOSTNAME 0 +#define A_BROADCAST 0 +#endif -/* Input an Ethernet address and convert to binary. */ -static int -in_ether(char *bufp, struct sockaddr *sap) -{ - unsigned char *ptr; - char c, *orig; - int i; - unsigned val; - - sap->sa_family = ARPHRD_ETHER; - ptr = sap->sa_data; - - i = 0; - orig = bufp; - while ((*bufp != '\0') && (i < ETH_ALEN)) { - val = 0; - c = *bufp++; - if (isdigit(c)) - val = c - '0'; - else if (c >= 'a' && c <= 'f') - val = c - 'a' + 10; - else if (c >= 'A' && c <= 'F') - val = c - 'A' + 10; - else { -#ifdef DEBUG - fprintf(stderr, - _("in_ether(%s): invalid ether address!\n"), - orig); -#endif - errno = EINVAL; - return (-1); - } - val <<= 4; - c = *bufp; - if (isdigit(c)) - val |= c - '0'; - else if (c >= 'a' && c <= 'f') - val |= c - 'a' + 10; - else if (c >= 'A' && c <= 'F') - val |= c - 'A' + 10; - else if (c == ':' || c == 0) - val >>= 4; - else { -#ifdef DEBUG - fprintf(stderr, - _("in_ether(%s): invalid ether address!\n"), - orig); -#endif - errno = EINVAL; - return (-1); - } - if (c != 0) - bufp++; - *ptr++ = (unsigned char) (val & 0377); - i++; - - /* We might get a semicolon here - not required. */ - if (*bufp == ':') - bufp++; - - } +/* + * These defines are for dealing with the A_CAST_TYPE field. + */ +#define A_CAST_CHAR_PTR 0x01 +#define A_CAST_RESOLVE 0x01 +#define A_CAST_HOST_COPY 0x02 +#define A_CAST_HOST_COPY_IN_ETHER A_CAST_HOST_COPY +#define A_CAST_HOST_COPY_RESOLVE (A_CAST_HOST_COPY | A_CAST_RESOLVE) + +/* + * These defines are for dealing with the A_MAP_TYPE field. + */ +#define A_MAP_ULONG 0x04 /* memstart */ +#define A_MAP_USHORT 0x08 /* io_addr */ +#define A_MAP_UCHAR 0x0C /* irq */ - if(i != ETH_ALEN) { - errno = EINVAL; - return -1; - } +/* + * Define the bit masks signifying which operations to perform for each arg. + */ - return 0; -} +#define ARG_METRIC (A_ARG_REQ /*| A_CAST_INT*/) +#define ARG_MTU (A_ARG_REQ /*| A_CAST_INT*/) +#define ARG_TXQUEUELEN (A_ARG_REQ /*| A_CAST_INT*/) +#define ARG_MEM_START (A_ARG_REQ | A_MAP_ULONG) +#define ARG_IO_ADDR (A_ARG_REQ | A_MAP_ULONG) +#define ARG_IRQ (A_ARG_REQ | A_MAP_UCHAR) +#define ARG_DSTADDR (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE) +#define ARG_NETMASK (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_NETMASK) +#define ARG_BROADCAST (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_BROADCAST) +#define ARG_HW (A_ARG_REQ | A_CAST_HOST_COPY_IN_ETHER) +#define ARG_POINTOPOINT (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) +#define ARG_KEEPALIVE (A_ARG_REQ | A_CAST_CHAR_PTR) +#define ARG_OUTFILL (A_ARG_REQ | A_CAST_CHAR_PTR) +#define ARG_HOSTNAME (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_COLON_CHK | A_HOSTNAME) +#define ARG_ADD_DEL (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) + + +/* + * Set up the tables. Warning! They must have corresponding order! + */ + +struct arg1opt { + const char *name; + unsigned short selector; + unsigned short ifr_offset; +}; + +struct options { + const char *name; +#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS + const unsigned int flags:6; + const unsigned int arg_flags:10; +#else + const unsigned char flags; + const unsigned char arg_flags; +#endif + const unsigned short selector; +}; + +#define ifreq_offsetof(x) offsetof(struct ifreq, x) + +static const struct arg1opt Arg1Opt[] = { + { "SIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric) }, + { "SIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu) }, + { "SIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen) }, + { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) }, + { "SIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask) }, + { "SIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr) }, +#if ENABLE_FEATURE_IFCONFIG_HW + { "SIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr) }, +#endif + { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) }, +#ifdef SIOCSKEEPALIVE + { "SKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data) }, +#endif +#ifdef SIOCSOUTFILL + { "SOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data) }, +#endif +#if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ + { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.mem_start) }, + { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr) }, + { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.irq) }, +#endif + /* Last entry if for unmatched (possibly hostname) arg. */ +#if ENABLE_FEATURE_IPV6 + { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ + { "DIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ +#endif + { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, +}; + +static const struct options OptArray[] = { + { "metric", N_ARG, ARG_METRIC, 0 }, + { "mtu", N_ARG, ARG_MTU, 0 }, + { "txqueuelen", N_ARG, ARG_TXQUEUELEN, 0 }, + { "dstaddr", N_ARG, ARG_DSTADDR, 0 }, + { "netmask", N_ARG, ARG_NETMASK, 0 }, + { "broadcast", N_ARG | M_CLR, ARG_BROADCAST, IFF_BROADCAST }, +#if ENABLE_FEATURE_IFCONFIG_HW + { "hw", N_ARG, ARG_HW, 0 }, +#endif + { "pointopoint", N_ARG | M_CLR, ARG_POINTOPOINT, IFF_POINTOPOINT }, +#ifdef SIOCSKEEPALIVE + { "keepalive", N_ARG, ARG_KEEPALIVE, 0 }, +#endif +#ifdef SIOCSOUTFILL + { "outfill", N_ARG, ARG_OUTFILL, 0 }, +#endif +#if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ + { "mem_start", N_ARG, ARG_MEM_START, 0 }, + { "io_addr", N_ARG, ARG_IO_ADDR, 0 }, + { "irq", N_ARG, ARG_IRQ, 0 }, +#endif +#if ENABLE_FEATURE_IPV6 + { "add", N_ARG, ARG_ADD_DEL, 0 }, + { "del", N_ARG, ARG_ADD_DEL, 0 }, +#endif + { "arp", N_CLR | M_SET, 0, IFF_NOARP }, + { "trailers", N_CLR | M_SET, 0, IFF_NOTRAILERS }, + { "promisc", N_SET | M_CLR, 0, IFF_PROMISC }, + { "multicast", N_SET | M_CLR, 0, IFF_MULTICAST }, + { "allmulti", N_SET | M_CLR, 0, IFF_ALLMULTI }, + { "dynamic", N_SET | M_CLR, 0, IFF_DYNAMIC }, + { "up", N_SET, 0, (IFF_UP | IFF_RUNNING) }, + { "down", N_CLR, 0, IFF_UP }, + { NULL, 0, ARG_HOSTNAME, (IFF_UP | IFF_RUNNING) } +}; + +/* + * A couple of prototypes. + */ +#if ENABLE_FEATURE_IFCONFIG_HW +static int in_ether(const char *bufp, struct sockaddr *sap); +#endif -int ifconfig_main(int argc, char **argv) +/* + * Our main function. + */ +int ifconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int ifconfig_main(int argc UNUSED_PARAM, char **argv) { struct ifreq ifr; - struct sockaddr_in sa; - struct sockaddr sa2; - char **spp; - int goterr = 0; - int r, didnetmask = 0; - char host[128]; - - if(argc < 2) { - usage(ifconfig_usage); - } - - /* Create a channel to the NET kernel. */ - if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { - perror("socket"); - exit(1); - } + struct sockaddr_in sai; +#if ENABLE_FEATURE_IFCONFIG_HW + struct sockaddr sa; +#endif + const struct arg1opt *a1op; + const struct options *op; + int sockfd; /* socket fd we use to manipulate stuff with */ + int selector; +#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS + unsigned int mask; + unsigned int did_flags; + unsigned int sai_hostname, sai_netmask; +#else + unsigned char mask; + unsigned char did_flags; +#endif + char *p; + /*char host[128];*/ + const char *host = NULL; /* make gcc happy */ + + did_flags = 0; +#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS + sai_hostname = 0; + sai_netmask = 0; +#endif /* skip argv[0] */ + ++argv; - argc--; - argv++; +#if ENABLE_FEATURE_IFCONFIG_STATUS + if (argv[0] && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) { + interface_opt_a = 1; + ++argv; + } +#endif - spp = argv; + if (!argv[0] || !argv[1]) { /* one or no args */ +#if ENABLE_FEATURE_IFCONFIG_STATUS + return display_interfaces(argv[0] /* can be NULL */); +#else + bb_error_msg_and_die("no support for status display"); +#endif + } - /* get interface name */ + /* Create a channel to the NET kernel. */ + sockfd = xsocket(AF_INET, SOCK_DGRAM, 0); - safe_strncpy(ifr.ifr_name, *spp++, IFNAMSIZ); + /* get interface name */ + strncpy_IFNAMSIZ(ifr.ifr_name, *argv); /* Process the remaining arguments. */ - while (*spp != (char *) NULL) { - if (!strcmp(*spp, "arp")) { - goterr |= clr_flag(ifr.ifr_name, IFF_NOARP); - spp++; - continue; - } - if (!strcmp(*spp, "-arp")) { - goterr |= set_flag(ifr.ifr_name, IFF_NOARP); - spp++; - continue; - } - - if (!strcmp(*spp, "trailers")) { - goterr |= clr_flag(ifr.ifr_name, IFF_NOTRAILERS); - spp++; - continue; - } - if (!strcmp(*spp, "-trailers")) { - goterr |= set_flag(ifr.ifr_name, IFF_NOTRAILERS); - spp++; - continue; - } - if (!strcmp(*spp, "promisc")) { - goterr |= set_flag(ifr.ifr_name, IFF_PROMISC); - spp++; - continue; - } - if (!strcmp(*spp, "-promisc")) { - goterr |= clr_flag(ifr.ifr_name, IFF_PROMISC); - spp++; - continue; - } - if (!strcmp(*spp, "multicast")) { - goterr |= set_flag(ifr.ifr_name, IFF_MULTICAST); - spp++; - continue; - } - if (!strcmp(*spp, "-multicast")) { - goterr |= clr_flag(ifr.ifr_name, IFF_MULTICAST); - spp++; - continue; - } - if (!strcmp(*spp, "allmulti")) { - goterr |= set_flag(ifr.ifr_name, IFF_ALLMULTI); - spp++; - continue; - } - if (!strcmp(*spp, "-allmulti")) { - goterr |= clr_flag(ifr.ifr_name, IFF_ALLMULTI); - spp++; - continue; - } - if (!strcmp(*spp, "up")) { - goterr |= set_flag(ifr.ifr_name, (IFF_UP | IFF_RUNNING)); - spp++; - continue; + while (*++argv != (char *) NULL) { + p = *argv; + mask = N_MASK; + if (*p == '-') { /* If the arg starts with '-'... */ + ++p; /* advance past it and */ + mask = M_MASK; /* set the appropriate mask. */ } - if (!strcmp(*spp, "down")) { - goterr |= clr_flag(ifr.ifr_name, IFF_UP); - spp++; - continue; - } - - if (!strcmp(*spp, "metric")) { - if (*++spp == NULL) - usage(ifconfig_usage); - ifr.ifr_metric = atoi(*spp); - if (ioctl(sockfd, SIOCSIFMETRIC, &ifr) < 0) { - fprintf(stderr, "SIOCSIFMETRIC: %s\n", strerror(errno)); - goterr++; + for (op = OptArray; op->name; op++) { /* Find table entry. */ + if (strcmp(p, op->name) == 0) { /* If name matches... */ + mask &= op->flags; + if (mask) /* set the mask and go. */ + goto FOUND_ARG; + /* If we get here, there was a valid arg with an */ + /* invalid '-' prefix. */ + bb_error_msg_and_die("bad: '%s'", p-1); } - spp++; - continue; } - if (!strcmp(*spp, "mtu")) { - if (*++spp == NULL) - usage(ifconfig_usage); - ifr.ifr_mtu = atoi(*spp); - if (ioctl(sockfd, SIOCSIFMTU, &ifr) < 0) { - fprintf(stderr, "SIOCSIFMTU: %s\n", strerror(errno)); - goterr++; - } - spp++; - continue; - } -#ifdef SIOCSKEEPALIVE - if (!strcmp(*spp, "keepalive")) { - if (*++spp == NULL) - usage(ifconfig_usage); - ifr.ifr_data = (caddr_t) atoi(*spp); - if (ioctl(sockfd, SIOCSKEEPALIVE, &ifr) < 0) { - fprintf(stderr, "SIOCSKEEPALIVE: %s\n", strerror(errno)); - goterr++; - } - spp++; - continue; - } -#endif -#ifdef SIOCSOUTFILL - if (!strcmp(*spp, "outfill")) { - if (*++spp == NULL) - usage(ifconfig_usage); - ifr.ifr_data = (caddr_t) atoi(*spp); - if (ioctl(sockfd, SIOCSOUTFILL, &ifr) < 0) { - fprintf(stderr, "SIOCSOUTFILL: %s\n", strerror(errno)); - goterr++; - } - spp++; - continue; - } + /* We fell through, so treat as possible hostname. */ + a1op = Arg1Opt + ARRAY_SIZE(Arg1Opt) - 1; + mask = op->arg_flags; + goto HOSTNAME; + + FOUND_ARG: + if (mask & ARG_MASK) { + mask = op->arg_flags; + a1op = Arg1Opt + (op - OptArray); + if (mask & A_NETMASK & did_flags) + bb_show_usage(); + if (*++argv == NULL) { + if (mask & A_ARG_REQ) + bb_show_usage(); + --argv; + mask &= A_SET_AFTER; /* just for broadcast */ + } else { /* got an arg so process it */ + HOSTNAME: + did_flags |= (mask & (A_NETMASK|A_HOSTNAME)); + if (mask & A_CAST_HOST_COPY) { +#if ENABLE_FEATURE_IFCONFIG_HW + if (mask & A_CAST_RESOLVE) { #endif - - if (!strcmp(*spp, "-broadcast")) { - goterr |= clr_flag(ifr.ifr_name, IFF_BROADCAST); - spp++; - continue; - } - if (!strcmp(*spp, "broadcast")) { - if (*++spp != NULL) { - safe_strncpy(host, *spp, (sizeof host)); - if (INET_resolve(host, &sa) < 0) { - goterr++; - spp++; - continue; - } - memcpy((char *) &ifr.ifr_broadaddr, - (char *) &sa, - sizeof(struct sockaddr)); - if (ioctl(sockfd, SIOCSIFBRDADDR, &ifr) < 0) { - perror("SIOCSIFBRDADDR"); - goterr++; +#if ENABLE_FEATURE_IPV6 + char *prefix; + int prefix_len = 0; +#endif + /*safe_strncpy(host, *argv, (sizeof host));*/ + host = *argv; +#if ENABLE_FEATURE_IPV6 + prefix = strchr(host, '/'); + if (prefix) { + prefix_len = xatou_range(prefix + 1, 0, 128); + *prefix = '\0'; + } +#endif + sai.sin_family = AF_INET; + sai.sin_port = 0; + if (strcmp(host, "default") == 0) { + /* Default is special, meaning 0.0.0.0. */ + sai.sin_addr.s_addr = INADDR_ANY; + } +#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS + else if ((host[0] == '+' && !host[1]) && (mask & A_BROADCAST) + && (did_flags & (A_NETMASK|A_HOSTNAME)) == (A_NETMASK|A_HOSTNAME) + ) { + /* + is special, meaning broadcast is derived. */ + sai.sin_addr.s_addr = (~sai_netmask) | (sai_hostname & sai_netmask); + } +#endif + else { + len_and_sockaddr *lsa; + if (strcmp(host, "inet") == 0) + continue; /* compat stuff */ + lsa = xhost2sockaddr(host, 0); +#if ENABLE_FEATURE_IPV6 + if (lsa->u.sa.sa_family == AF_INET6) { + int sockfd6; + struct in6_ifreq ifr6; + + memcpy((char *) &ifr6.ifr6_addr, + (char *) &(lsa->u.sin6.sin6_addr), + sizeof(struct in6_addr)); + + /* Create a channel to the NET kernel. */ + sockfd6 = xsocket(AF_INET6, SOCK_DGRAM, 0); + xioctl(sockfd6, SIOGIFINDEX, &ifr); + ifr6.ifr6_ifindex = ifr.ifr_ifindex; + ifr6.ifr6_prefixlen = prefix_len; + ioctl_or_perror_and_die(sockfd6, a1op->selector, &ifr6, "SIOC%s", a1op->name); + if (ENABLE_FEATURE_CLEAN_UP) + free(lsa); + continue; + } +#endif + sai.sin_addr = lsa->u.sin.sin_addr; + if (ENABLE_FEATURE_CLEAN_UP) + free(lsa); + } +#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS + if (mask & A_HOSTNAME) + sai_hostname = sai.sin_addr.s_addr; + if (mask & A_NETMASK) + sai_netmask = sai.sin_addr.s_addr; +#endif + p = (char *) &sai; +#if ENABLE_FEATURE_IFCONFIG_HW + } else { /* A_CAST_HOST_COPY_IN_ETHER */ + /* This is the "hw" arg case. */ + smalluint hw_class= index_in_substrings("ether\0" + IF_FEATURE_HWIB("infiniband\0"), *argv) + 1; + if (!hw_class || !*++argv) + bb_show_usage(); + /*safe_strncpy(host, *argv, sizeof(host));*/ + host = *argv; + if (hw_class == 1 ? in_ether(host, &sa) : in_ib(host, &sa)) + bb_error_msg_and_die("invalid hw-addr %s", host); + p = (char *) &sa; + } +#endif + memcpy( (((char *)&ifr) + a1op->ifr_offset), + p, sizeof(struct sockaddr)); + } else { + /* FIXME: error check?? */ + unsigned long i = strtoul(*argv, NULL, 0); + p = ((char *)&ifr) + a1op->ifr_offset; +#if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ + if (mask & A_MAP_TYPE) { + xioctl(sockfd, SIOCGIFMAP, &ifr); + if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR) + *((unsigned char *) p) = i; + else if (mask & A_MAP_USHORT) + *((unsigned short *) p) = i; + else + *((unsigned long *) p) = i; + } else +#endif + if (mask & A_CAST_CHAR_PTR) + *((caddr_t *) p) = (caddr_t) i; + else /* A_CAST_INT */ + *((int *) p) = i; } - spp++; - } - goterr |= set_flag(ifr.ifr_name, IFF_BROADCAST); - continue; - } - if (!strcmp(*spp, "dstaddr")) { - if (*++spp == NULL) - usage(ifconfig_usage); - safe_strncpy(host, *spp, (sizeof host)); - if (INET_resolve(host, &sa) < 0) { - goterr++; - spp++; - continue; - } - memcpy((char *) &ifr.ifr_dstaddr, (char *) &sa, - sizeof(struct sockaddr)); - if (ioctl(sockfd, SIOCSIFDSTADDR, &ifr) < 0) { - fprintf(stderr, "SIOCSIFDSTADDR: %s\n", - strerror(errno)); - goterr++; - } - spp++; - continue; - } - if (!strcmp(*spp, "netmask")) { - if (*++spp == NULL || didnetmask) - usage(ifconfig_usage); - safe_strncpy(host, *spp, (sizeof host)); - if (INET_resolve(host, &sa) < 0) { - goterr++; - spp++; - continue; - } - didnetmask++; - memcpy((char *) &ifr.ifr_netmask, (char *) &sa, - sizeof(struct sockaddr)); - if (ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) { - perror("SIOCSIFNETMASK"); - goterr++; - } - spp++; - continue; - } - if (!strcmp(*spp, "-pointopoint")) { - goterr |= clr_flag(ifr.ifr_name, IFF_POINTOPOINT); - spp++; - continue; - } - if (!strcmp(*spp, "pointopoint")) { - if (*(spp + 1) != NULL) { - spp++; - safe_strncpy(host, *spp, (sizeof host)); - if (INET_resolve(host, &sa)) { - goterr++; - spp++; - continue; + ioctl_or_perror_and_die(sockfd, a1op->selector, &ifr, "SIOC%s", a1op->name); +#ifdef QUESTIONABLE_ALIAS_CASE + if (mask & A_COLON_CHK) { + /* + * Don't do the set_flag() if the address is an alias with + * a '-' at the end, since it's deleted already! - Roman + * + * Should really use regex.h here, not sure though how well + * it'll go with the cross-platform support etc. + */ + char *ptr; + short int found_colon = 0; + for (ptr = ifr.ifr_name; *ptr; ptr++) + if (*ptr == ':') + found_colon++; + if (found_colon && ptr[-1] == '-') + continue; } - memcpy((char *) &ifr.ifr_dstaddr, (char *) &sa, - sizeof(struct sockaddr)); - if (ioctl(sockfd, SIOCSIFDSTADDR, &ifr) < 0) { - perror("SIOCSIFDSTADDR"); - goterr++; - } - } - goterr |= set_flag(ifr.ifr_name, IFF_POINTOPOINT); - spp++; - continue; - }; - - if (!strcmp(*spp, "hw")) { - if (*++spp == NULL || strcmp("ether", *spp)) { - usage(ifconfig_usage); - } - - if (*++spp == NULL) { - /* silently ignore it if no address */ - continue; +#endif } - - safe_strncpy(host, *spp, (sizeof host)); - if (in_ether(host, &sa2) < 0) { - fprintf(stderr, "invalid hw-addr %s\n", host); - goterr++; - spp++; + if (!(mask & A_SET_AFTER)) continue; - } - memcpy((char *) &ifr.ifr_hwaddr, (char *) &sa2, - sizeof(struct sockaddr)); - if (ioctl(sockfd, SIOCSIFHWADDR, &ifr) < 0) { - perror("SIOCSIFHWADDR"); - goterr++; - } - spp++; - continue; + mask = N_SET; } - /* If the next argument is a valid hostname, assume OK. */ - safe_strncpy(host, *spp, (sizeof host)); + xioctl(sockfd, SIOCGIFFLAGS, &ifr); + selector = op->selector; + if (mask & SET_MASK) + ifr.ifr_flags |= selector; + else + ifr.ifr_flags &= ~selector; + xioctl(sockfd, SIOCSIFFLAGS, &ifr); + } /* while () */ + + if (ENABLE_FEATURE_CLEAN_UP) + close(sockfd); + return 0; +} - if (INET_resolve(host, &sa) < 0) { - usage(ifconfig_usage); - } - memcpy((char *) &ifr.ifr_addr, - (char *) &sa, sizeof(struct sockaddr)); +#if ENABLE_FEATURE_IFCONFIG_HW +/* Input an Ethernet address and convert to binary. */ +static int in_ether(const char *bufp, struct sockaddr *sap) +{ + char *ptr; + int i, j; + unsigned char val; + unsigned char c; - r = ioctl(sockfd, SIOCSIFADDR, &ifr); + sap->sa_family = ARPHRD_ETHER; + ptr = (char *) sap->sa_data; - if (r < 0) { - perror("SIOCSIFADDR"); - goterr++; - } + i = 0; + do { + j = val = 0; - /* - * Don't do the set_flag() if the address is an alias with a - at the - * end, since it's deleted already! - Roman - * - * Should really use regex.h here, not sure though how well it'll go - * with the cross-platform support etc. - */ - { - char *ptr; - short int found_colon = 0; - for (ptr = ifr.ifr_name; *ptr; ptr++ ) - if (*ptr == ':') found_colon++; - - if (!(found_colon && *(ptr - 1) == '-')) - goterr |= set_flag(ifr.ifr_name, (IFF_UP | IFF_RUNNING)); + /* We might get a semicolon here - not required. */ + if (i && (*bufp == ':')) { + bufp++; } - - spp++; - } /* end of while-loop */ - - exit(0); + do { + c = *bufp; + if (((unsigned char)(c - '0')) <= 9) { + c -= '0'; + } else if (((unsigned char)((c|0x20) - 'a')) <= 5) { + c = (c|0x20) - ('a'-10); + } else if (j && (c == ':' || c == 0)) { + break; + } else { + return -1; + } + ++bufp; + val <<= 4; + val += c; + } while (++j < 2); + *ptr++ = val; + } while (++i < ETH_ALEN); + + return *bufp; /* Error if we don't end at end of string. */ } - +#endif