* Bjorn Wesen, Axis Communications AB
*
*
- * Authors of the original ifconfig was:
+ * Authors of the original ifconfig was:
* Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
*
* This program is free software; you can redistribute it
* Foundation; either version 2 of the License, or (at
* your option) any later version.
*
- * $Id: ifconfig.c,v 1.2 2001/02/14 21:23:06 andersen Exp $
+ * $Id: ifconfig.c,v 1.30 2004/03/31 11:30:08 andersen Exp $
*
*/
-#include "busybox.h"
-#include <sys/types.h>
+/*
+ * 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.
+ *
+ * 2002-04-20
+ * IPV6 support added by Bart Visscher <magick@linux-fan.com>
+ */
+
#include <stdio.h>
#include <stdlib.h>
-#include <errno.h>
-#include <string.h> // strcmp and friends
-#include <ctype.h> // isdigit and friends
-#include <sys/socket.h>
+#include <string.h> /* strcmp and friends */
+#include <ctype.h> /* isdigit and friends */
+#include <stddef.h> /* offsetof */
+#include <netdb.h>
#include <sys/ioctl.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
#include <net/if.h>
#include <net/if_arp.h>
+#include <netinet/in.h>
+#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
+#include <netpacket/packet.h>
+#include <net/ethernet.h>
+#else
+#include <asm/types.h>
#include <linux/if_ether.h>
+#endif
+#include "inet_common.h"
+#include "busybox.h"
-static int sockfd; /* socket fd we use to manipulate stuff with */
+#ifdef CONFIG_FEATURE_IFCONFIG_SLIP
+# include <net/if_slip.h>
+#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 */
+#ifdef CONFIG_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. */
+#ifdef CONFIG_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;
+#ifdef CONFIG_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[] = {
+ {"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 CONFIG_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 CONFIG_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. */
+#ifdef CONFIG_FEATURE_IPV6
+ {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */
+ {"SIOCDIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */
+#endif
+ {"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 CONFIG_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 CONFIG_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
+#ifdef CONFIG_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.
+ */
+
+#ifdef CONFIG_FEATURE_IFCONFIG_HW
+static int in_ether(char *bufp, struct sockaddr *sap);
+#endif
+
+#ifdef CONFIG_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 sa;
- struct sockaddr sa2;
- char **spp;
- int goterr = 0;
- int r, didnetmask = 0;
+ struct sockaddr_in sai;
+#ifdef CONFIG_FEATURE_IPV6
+ struct sockaddr_in6 sai6;
+#endif
+#ifdef CONFIG_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;
+#ifdef CONFIG_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];
- if(argc < 2) {
- show_usage();
+ goterr = 0;
+ did_flags = 0;
+#ifdef CONFIG_FEATURE_IFCONFIG_BROADCAST_PLUS
+ sai_hostname = 0;
+ sai_netmask = 0;
+#endif
+
+ /* skip argv[0] */
+ ++argv;
+ --argc;
+
+#ifdef CONFIG_FEATURE_IFCONFIG_STATUS
+ if ((argc > 0) && (((*argv)[0] == '-') && ((*argv)[1] == 'a') && !(*argv)[2])) {
+ interface_opt_a = 1;
+ --argc;
+ ++argv;
+ }
+#endif
+
+ if (argc <= 1) {
+#ifdef CONFIG_FEATURE_IFCONFIG_STATUS
+ return display_interfaces(argc ? *argv : NULL);
+#else
+ bb_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("socket");
- exit(1);
+ bb_perror_msg_and_die("socket");
}
- /* skip argv[0] */
-
- argc--;
- argv++;
-
- spp = argv;
-
/* get interface name */
-
- safe_strncpy(ifr.ifr_name, *spp++, IFNAMSIZ);
+ safe_strncpy(ifr.ifr_name, *argv, IFNAMSIZ);
/* 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;
+ 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, "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;
- }
- if (!strcmp(*spp, "down")) {
- goterr |= clr_flag(ifr.ifr_name, IFF_UP);
- spp++;
- continue;
- }
-
- if (!strcmp(*spp, "metric")) {
- if (*++spp == NULL)
- show_usage();
- ifr.ifr_metric = atoi(*spp);
- if (ioctl(sockfd, SIOCSIFMETRIC, &ifr) < 0) {
- fprintf(stderr, "SIOCSIFMETRIC: %s\n", strerror(errno));
- goterr++;
- }
- spp++;
- continue;
- }
- if (!strcmp(*spp, "mtu")) {
- if (*++spp == NULL)
- show_usage();
- ifr.ifr_mtu = atoi(*spp);
- if (ioctl(sockfd, SIOCSIFMTU, &ifr) < 0) {
- fprintf(stderr, "SIOCSIFMTU: %s\n", strerror(errno));
- goterr++;
+ 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;
}
- spp++;
- continue;
}
-#ifdef SIOCSKEEPALIVE
- if (!strcmp(*spp, "keepalive")) {
- if (*++spp == NULL)
- show_usage();
- ifr.ifr_data = (caddr_t) atoi(*spp);
- if (ioctl(sockfd, SIOCSKEEPALIVE, &ifr) < 0) {
- fprintf(stderr, "SIOCSKEEPALIVE: %s\n", strerror(errno));
- goterr++;
+
+ /* 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) {
+ bb_show_usage();
}
- spp++;
- continue;
- }
+ if (*++argv == NULL) {
+ if (mask & A_ARG_REQ) {
+ bb_show_usage();
+ } else {
+ --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) {
+#ifdef CONFIG_FEATURE_IFCONFIG_HW
+ if (mask & A_CAST_RESOLVE) {
+#endif
+#ifdef CONFIG_FEATURE_IPV6
+ char *prefix;
+ int prefix_len = 0;
#endif
-#ifdef SIOCSOUTFILL
- if (!strcmp(*spp, "outfill")) {
- if (*++spp == NULL)
- show_usage();
- ifr.ifr_data = (caddr_t) atoi(*spp);
- if (ioctl(sockfd, SIOCSOUTFILL, &ifr) < 0) {
- fprintf(stderr, "SIOCSOUTFILL: %s\n", strerror(errno));
- goterr++;
- }
- spp++;
- continue;
- }
+ safe_strncpy(host, *argv, (sizeof host));
+#ifdef CONFIG_FEATURE_IPV6
+ if ((prefix = strchr(host, '/'))) {
+ if (safe_strtoi(prefix + 1, &prefix_len) ||
+ (prefix_len < 0) || (prefix_len > 128))
+ {
+ ++goterr;
+ goto LOOP;
+ }
+ *prefix = 0;
+ }
#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++;
+ sai.sin_family = AF_INET;
+ sai.sin_port = 0;
+ if (!strcmp(host, bb_INET_default)) {
+ /* Default is special, meaning 0.0.0.0. */
+ sai.sin_addr.s_addr = INADDR_ANY;
+#ifdef CONFIG_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
+#ifdef CONFIG_FEATURE_IPV6
+ } else if (inet_pton(AF_INET6, host, &sai6.sin6_addr) > 0) {
+ int sockfd6;
+ struct in6_ifreq ifr6;
+
+ memcpy((char *) &ifr6.ifr6_addr,
+ (char *) &sai6.sin6_addr,
+ sizeof(struct in6_addr));
+
+ /* Create a channel to the NET kernel. */
+ if ((sockfd6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
+ bb_perror_msg_and_die("socket6");
+ }
+ if (ioctl(sockfd6, SIOGIFINDEX, &ifr) < 0) {
+ perror("SIOGIFINDEX");
+ ++goterr;
+ continue;
+ }
+ ifr6.ifr6_ifindex = ifr.ifr_ifindex;
+ ifr6.ifr6_prefixlen = prefix_len;
+ if (ioctl(sockfd6, a1op->selector, &ifr6) < 0) {
+ perror(a1op->name);
+ ++goterr;
+ }
+ continue;
+#endif
+ } else if (inet_aton(host, &sai.sin_addr) == 0) {
+ /* It's not a dotted quad. */
+ struct hostent *hp;
+ if ((hp = gethostbyname(host)) == (struct hostent *)NULL) {
+ ++goterr;
+ continue;
+ }
+ memcpy((char *) &sai.sin_addr, (char *) hp->h_addr_list[0],
+ sizeof(struct in_addr));
+ }
+#ifdef CONFIG_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;
+#ifdef CONFIG_FEATURE_IFCONFIG_HW
+ } else { /* A_CAST_HOST_COPY_IN_ETHER */
+ /* This is the "hw" arg case. */
+ if (strcmp("ether", *argv) || (*++argv == NULL)) {
+ bb_show_usage();
+ }
+ safe_strncpy(host, *argv, (sizeof host));
+ if (in_ether(host, &sa)) {
+ bb_error_msg("invalid hw-addr %s", 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 CONFIG_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;
+ }
}
- spp++;
- }
- goterr |= set_flag(ifr.ifr_name, IFF_BROADCAST);
- continue;
- }
- if (!strcmp(*spp, "dstaddr")) {
- if (*++spp == NULL)
- show_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)
- show_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++;
+ if (ioctl(sockfd, a1op->selector, &ifr) < 0) {
+ perror(a1op->name);
+ ++goterr;
continue;
}
- memcpy((char *) &ifr.ifr_dstaddr, (char *) &sa,
- sizeof(struct sockaddr));
- if (ioctl(sockfd, SIOCSIFDSTADDR, &ifr) < 0) {
- perror("SIOCSIFDSTADDR");
- goterr++;
+#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
}
- goterr |= set_flag(ifr.ifr_name, IFF_POINTOPOINT);
- spp++;
- continue;
- };
-
- if (!strcmp(*spp, "hw")) {
- if (*++spp == NULL || strcmp("ether", *spp)) {
- show_usage();
- }
-
- if (*++spp == NULL) {
- /* silently ignore it if no address */
+ if (!(mask & A_SET_AFTER)) {
continue;
}
+ mask = N_SET;
+ }
- safe_strncpy(host, *spp, (sizeof host));
- if (in_ether(host, &sa2) < 0) {
- fprintf(stderr, "invalid hw-addr %s\n", host);
- goterr++;
- spp++;
- continue;
+ 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;
}
- memcpy((char *) &ifr.ifr_hwaddr, (char *) &sa2,
- sizeof(struct sockaddr));
- if (ioctl(sockfd, SIOCSIFHWADDR, &ifr) < 0) {
- perror("SIOCSIFHWADDR");
- goterr++;
+ if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
+ perror("SIOCSIFFLAGS");
+ ++goterr;
}
- spp++;
- continue;
}
+ LOOP:
+ continue;
+ } /* end of while-loop */
- /* If the next argument is a valid hostname, assume OK. */
- safe_strncpy(host, *spp, (sizeof host));
+ return goterr;
+}
- if (INET_resolve(host, &sa) < 0) {
- show_usage();
- }
- memcpy((char *) &ifr.ifr_addr,
- (char *) &sa, sizeof(struct sockaddr));
+#ifdef CONFIG_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;
- r = ioctl(sockfd, SIOCSIFADDR, &ifr);
+ sap->sa_family = ARPHRD_ETHER;
+ ptr = 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 (int) (*bufp); /* Error if we don't end at end of string. */
}
-
+#endif
projects / oweals / busybox.git / blobdiff