diff options
Diffstat (limited to 'ifconfig.c')
| -rw-r--r-- | ifconfig.c | 492 |
1 files changed, 0 insertions, 492 deletions
diff --git a/ifconfig.c b/ifconfig.c deleted file mode 100644 index c77ea04..0000000 --- a/ifconfig.c +++ /dev/null @@ -1,492 +0,0 @@ -/* ifconfig - * - * Similar to the standard Unix ifconfig, but with only the necessary - * parts for AF_INET, and without any printing of if info (for now). - * - * Bjorn Wesen, Axis Communications AB - * - * - * Authors of the original ifconfig was: - * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> - * - * 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. - * - * $Id: ifconfig.c,v 1.12 2001/08/10 06:02:23 mjn3 Exp $ - * - */ - -/* - * 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. - * - * Still missing: media, tunnel. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> // strcmp and friends -#include <ctype.h> // isdigit and friends -#include <stddef.h> /* offsetof */ -#include <sys/types.h> -#include <sys/socket.h> -#include <sys/ioctl.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <net/if.h> -#include <net/if_arp.h> -#include <linux/if_ether.h> -#include "busybox.h" - -#ifdef BB_FEATURE_IFCONFIG_SLIP -#include <linux/if_slip.h> -#endif - -/* I don't know if this is needed for busybox or not. Anyone? */ -#define QUESTIONABLE_ALIAS_CASE - - -/* 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 - -#ifndef IFF_DYNAMIC -#define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */ -#endif - -/* - * 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. - */ - -/* - * 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. */ - -/* - * 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 */ - -/* - * Define the bit masks signifying which operations to perform for each arg. - */ - -#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_USHORT) -#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) -#define ARG_HW (A_ARG_REQ | A_CAST_HOST_COPY_IN_ETHER) -#define ARG_POINTOPOINT (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) - - -/* - * 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; - const unsigned char flags; - const unsigned char arg_flags; - const unsigned short selector; -}; - -#define ifreq_offsetof(x) offsetof(struct ifreq, x) - -static const struct arg1opt Arg1Opt[] = { - {"SIOCSIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric)}, - {"SIOCSIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu)}, - {"SIOCSIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen)}, - {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)}, - {"SIOCSIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask)}, - {"SIOCSIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr)}, -#ifdef BB_FEATURE_IFCONFIG_HW - {"SIOCSIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr)}, -#endif - {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)}, -#ifdef SIOCSKEEPALIVE - {"SIOCSKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data)}, -#endif -#ifdef SIOCSOUTFILL - {"SIOCSOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data)}, -#endif -#ifdef BB_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ - {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.mem_start)}, - {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr)}, - {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.irq)}, -#endif - /* Last entry if for unmatched (possibly hostname) arg. */ - {"SIOCSIFADDR", 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}, -#ifdef BB_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 -#ifdef BB_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 - {"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. - */ - -#ifdef BB_FEATURE_IFCONFIG_HW -static int in_ether(char *bufp, struct sockaddr *sap); -#endif - -#ifdef BB_FEATURE_IFCONFIG_STATUS -extern int interface_opt_a; -extern int display_interfaces(char *ifname); -#endif - -/* - * Our main function. - */ - -int ifconfig_main(int argc, char **argv) -{ - struct ifreq ifr; - struct sockaddr_in sai; -#ifdef BB_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 goterr; - int selector; - char *p; - char host[128]; - unsigned char mask; - unsigned char did_flags; - - goterr = 0; - did_flags = 0; - - /* skip argv[0] */ - ++argv; - --argc; - -#ifdef BB_FEATURE_IFCONFIG_STATUS - if ((argc > 0) && (strcmp(*argv,"-a") == 0)) { - interface_opt_a = 1; - --argc; - ++argv; - } -#endif - - if(argc <= 1) { -#ifdef BB_FEATURE_IFCONFIG_STATUS - return display_interfaces(argc ? *argv : NULL); -#else - error_msg_and_die( "ifconfig was not compiled with interface status display support."); -#endif - } - - /* Create a channel to the NET kernel. */ - if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { - perror_msg_and_die("socket"); - } - - /* get interface name */ - safe_strncpy(ifr.ifr_name, *argv, IFNAMSIZ); - - /* Process the remaining arguments. */ - 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. */ - } - for (op = OptArray ; op->name ; op++) { /* Find table entry. */ - if (strcmp(p,op->name) == 0) { /* If name matches... */ - if ((mask &= op->flags)) { /* set the mask and go. */ - goto FOUND_ARG;; - } - /* If we get here, there was a valid arg with an */ - /* invalid '-' prefix. */ - ++goterr; - goto LOOP; - } - } - - /* We fell through, so treat as possible hostname. */ - a1op = Arg1Opt + (sizeof(Arg1Opt) / sizeof(Arg1Opt[0])) - 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) { - show_usage(); - } - if (*++argv == NULL) { - if (mask & A_ARG_REQ) { - show_usage(); - } else { - --argv; - mask &= A_SET_AFTER; /* just for broadcast */ - } - } else { /* got an arg so process it */ - HOSTNAME: - did_flags |= (mask & A_NETMASK); - if (mask & A_CAST_HOST_COPY) { -#ifdef BB_FEATURE_IFCONFIG_HW - if (mask & A_CAST_RESOLVE) { -#endif - safe_strncpy(host, *argv, (sizeof host)); - sai.sin_family = AF_INET; - sai.sin_port = 0; - if (!strcmp(host, "default")) { - /* Default is special, meaning 0.0.0.0. */ - sai.sin_addr.s_addr = INADDR_ANY; - } else if (inet_aton(host, &sai.sin_addr) == 0) { - /* It's not a dotted quad. */ - ++goterr; - continue; - } - p = (char *) &sai; -#ifdef BB_FEATURE_IFCONFIG_HW - } else { /* A_CAST_HOST_COPY_IN_ETHER */ - /* This is the "hw" arg case. */ - if (strcmp("ether", *argv) || (*++argv == NULL)) { - show_usage(); - } - safe_strncpy(host, *argv, (sizeof host)); - if (in_ether(host, &sa)) { - fprintf(stderr, "invalid hw-addr %s\n", host); - ++goterr; - continue; - } - p = (char *) &sa; - } -#endif - memcpy((((char *)(&ifr)) + a1op->ifr_offset), - p, sizeof(struct sockaddr)); - } else { - unsigned int i = strtoul(*argv,NULL,0); - p = ((char *)(&ifr)) + a1op->ifr_offset; -#ifdef BB_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ - if (mask & A_MAP_TYPE) { - if (ioctl(sockfd, SIOCGIFMAP, &ifr) < 0) { - ++goterr; - continue; - } - 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; - } - } - - if (ioctl(sockfd, a1op->selector, &ifr) < 0) { - perror(a1op->name); - ++goterr; - continue; - } - -#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; - } - } -#endif - } - if (!(mask & A_SET_AFTER)) { - continue; - } - mask = N_SET; - } - - if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) { - perror("SIOCGIFFLAGS"); - ++goterr; - } else { - selector = op->selector; - if (mask & SET_MASK) { - ifr.ifr_flags |= selector; - } else { - ifr.ifr_flags &= ~selector; - } - if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) { - perror("SIOCSIFFLAGS"); - ++goterr; - } - } - LOOP: - } /* end of while-loop */ - - return goterr; -} - -#ifdef BB_FEATURE_IFCONFIG_HW -/* Input an Ethernet address and convert to binary. */ -static int -in_ether(char *bufp, struct sockaddr *sap) -{ - unsigned char *ptr; - int i, j; - unsigned char val; - unsigned char c; - - sap->sa_family = ARPHRD_ETHER; - ptr = sap->sa_data; - - for (i = 0 ; i < ETH_ALEN ; i++) { - val = 0; - - /* We might get a semicolon here - not required. */ - if (i && (*bufp == ':')) { - bufp++; - } - - for (j=0 ; j<2 ; j++) { - c = *bufp; - if (c >= '0' && c <= '9') { - c -= '0'; - } else if (c >= 'a' && c <= 'f') { - c -= ('a' - 10); - } else if (c >= 'A' && c <= 'F') { - c -= ('A' - 10); - } else if (j && (c == ':' || c == 0)) { - break; - } else { - return -1; - } - ++bufp; - val <<= 4; - val += c; - } - *ptr++ = val; - } - - return (int) (*bufp); /* Error if we don't end at end of string. */ -} -#endif |