blob: 5e11b2b7c4ca45d90c074cc25626e7c3d5db59bf [file] [log] [blame]
Bernhard Reutner-Fischerdac7ff12006-04-12 17:55:51 +00001/* vi: set sw=4 ts=4: */
Eric Andersenec455952001-02-14 08:11:27 +00002/* ifconfig
3 *
4 * Similar to the standard Unix ifconfig, but with only the necessary
5 * parts for AF_INET, and without any printing of if info (for now).
6 *
7 * Bjorn Wesen, Axis Communications AB
8 *
9 *
Eric Andersenc7bda1c2004-03-15 08:29:22 +000010 * Authors of the original ifconfig was:
Eric Andersenec455952001-02-14 08:11:27 +000011 * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
12 *
Bernhard Reutner-Fischerdac7ff12006-04-12 17:55:51 +000013 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
Eric Andersenec455952001-02-14 08:11:27 +000014 */
15
Manuel Novoa III df351d62001-03-08 22:57:00 +000016/*
17 * Heavily modified by Manuel Novoa III Mar 6, 2001
18 *
19 * From initial port to busybox, removed most of the redundancy by
20 * converting to a table-driven approach. Added several (optional)
21 * args missing from initial port.
22 *
Manuel Novoa III 68ea1d02001-03-12 09:57:59 +000023 * Still missing: media, tunnel.
Eric Andersen51b8bd62002-07-03 11:46:38 +000024 *
25 * 2002-04-20
26 * IPV6 support added by Bart Visscher <magick@linux-fan.com>
Manuel Novoa III df351d62001-03-08 22:57:00 +000027 */
28
Eric Andersenab4e19a2003-01-14 08:54:08 +000029#include <net/if.h>
Eric Andersenec455952001-02-14 08:11:27 +000030#include <net/if_arp.h>
Eric Andersencd8c4362001-11-10 11:22:46 +000031#include <netinet/in.h>
Denis Vlasenko83e5d6f2006-12-18 21:49:06 +000032#if defined(__GLIBC__) && __GLIBC__ >=2 && __GLIBC_MINOR__ >= 1
Eric Andersenab4e19a2003-01-14 08:54:08 +000033#include <netpacket/packet.h>
34#include <net/ethernet.h>
35#else
Rob Landley0d383012005-05-03 22:30:08 +000036#include <sys/types.h>
37#include <netinet/if_ether.h>
Eric Andersenab4e19a2003-01-14 08:54:08 +000038#endif
Eric Andersencd8c4362001-11-10 11:22:46 +000039#include "inet_common.h"
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000040#include "libbb.h"
Eric Andersenec455952001-02-14 08:11:27 +000041
Denis Vlasenko04b30ba2006-11-21 14:26:37 +000042#if ENABLE_FEATURE_IFCONFIG_SLIP
Eric Andersenab4e19a2003-01-14 08:54:08 +000043# include <net/if_slip.h>
Eric Andersenf15d4da2001-03-06 00:48:59 +000044#endif
45
Manuel Novoa III df351d62001-03-08 22:57:00 +000046/* I don't know if this is needed for busybox or not. Anyone? */
47#define QUESTIONABLE_ALIAS_CASE
Eric Andersenec455952001-02-14 08:11:27 +000048
49
Manuel Novoa III df351d62001-03-08 22:57:00 +000050/* Defines for glibc2.0 users. */
51#ifndef SIOCSIFTXQLEN
Glenn L McGrath8ae4cab2002-11-26 09:02:06 +000052# define SIOCSIFTXQLEN 0x8943
53# define SIOCGIFTXQLEN 0x8942
Manuel Novoa III df351d62001-03-08 22:57:00 +000054#endif
Eric Andersenec455952001-02-14 08:11:27 +000055
Manuel Novoa III df351d62001-03-08 22:57:00 +000056/* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */
57#ifndef ifr_qlen
Glenn L McGrath8ae4cab2002-11-26 09:02:06 +000058# define ifr_qlen ifr_ifru.ifru_mtu
Manuel Novoa III df351d62001-03-08 22:57:00 +000059#endif
Eric Andersenf15d4da2001-03-06 00:48:59 +000060
Manuel Novoa III df351d62001-03-08 22:57:00 +000061#ifndef IFF_DYNAMIC
Glenn L McGrath8ae4cab2002-11-26 09:02:06 +000062# define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */
Manuel Novoa III df351d62001-03-08 22:57:00 +000063#endif
Eric Andersenf15d4da2001-03-06 00:48:59 +000064
Denis Vlasenko04b30ba2006-11-21 14:26:37 +000065#if ENABLE_FEATURE_IPV6
Eric Andersen51b8bd62002-07-03 11:46:38 +000066struct in6_ifreq {
Glenn L McGrathbaf55a82002-08-22 18:22:10 +000067 struct in6_addr ifr6_addr;
68 uint32_t ifr6_prefixlen;
69 int ifr6_ifindex;
Eric Andersen51b8bd62002-07-03 11:46:38 +000070};
71#endif
72
Manuel Novoa III df351d62001-03-08 22:57:00 +000073/*
74 * Here are the bit masks for the "flags" member of struct options below.
75 * N_ signifies no arg prefix; M_ signifies arg prefixed by '-'.
76 * CLR clears the flag; SET sets the flag; ARG signifies (optional) arg.
Eric Andersenf15d4da2001-03-06 00:48:59 +000077 */
Manuel Novoa III df351d62001-03-08 22:57:00 +000078#define N_CLR 0x01
79#define M_CLR 0x02
80#define N_SET 0x04
81#define M_SET 0x08
82#define N_ARG 0x10
83#define M_ARG 0x20
84
85#define M_MASK (M_CLR | M_SET | M_ARG)
86#define N_MASK (N_CLR | N_SET | N_ARG)
87#define SET_MASK (N_SET | M_SET)
88#define CLR_MASK (N_CLR | M_CLR)
89#define SET_CLR_MASK (SET_MASK | CLR_MASK)
90#define ARG_MASK (M_ARG | N_ARG)
91
92/*
93 * Here are the bit masks for the "arg_flags" member of struct options below.
94 */
95
96/*
97 * cast type:
98 * 00 int
99 * 01 char *
100 * 02 HOST_COPY in_ether
101 * 03 HOST_COPY INET_resolve
102 */
103#define A_CAST_TYPE 0x03
104/*
105 * map type:
106 * 00 not a map type (mem_start, io_addr, irq)
107 * 04 memstart (unsigned long)
108 * 08 io_addr (unsigned short)
109 * 0C irq (unsigned char)
110 */
111#define A_MAP_TYPE 0x0C
112#define A_ARG_REQ 0x10 /* Set if an arg is required. */
113#define A_NETMASK 0x20 /* Set if netmask (check for multiple sets). */
114#define A_SET_AFTER 0x40 /* Set a flag at the end. */
115#define A_COLON_CHK 0x80 /* Is this needed? See below. */
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000116#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
Manuel Novoa III a6685582002-12-27 17:42:01 +0000117#define A_HOSTNAME 0x100 /* Set if it is ip addr. */
118#define A_BROADCAST 0x200 /* Set if it is broadcast addr. */
119#else
120#define A_HOSTNAME 0
121#define A_BROADCAST 0
122#endif
Manuel Novoa III df351d62001-03-08 22:57:00 +0000123
124/*
125 * These defines are for dealing with the A_CAST_TYPE field.
126 */
127#define A_CAST_CHAR_PTR 0x01
128#define A_CAST_RESOLVE 0x01
129#define A_CAST_HOST_COPY 0x02
130#define A_CAST_HOST_COPY_IN_ETHER A_CAST_HOST_COPY
131#define A_CAST_HOST_COPY_RESOLVE (A_CAST_HOST_COPY | A_CAST_RESOLVE)
132
133/*
134 * These defines are for dealing with the A_MAP_TYPE field.
135 */
136#define A_MAP_ULONG 0x04 /* memstart */
137#define A_MAP_USHORT 0x08 /* io_addr */
138#define A_MAP_UCHAR 0x0C /* irq */
139
140/*
141 * Define the bit masks signifying which operations to perform for each arg.
142 */
143
144#define ARG_METRIC (A_ARG_REQ /*| A_CAST_INT*/)
145#define ARG_MTU (A_ARG_REQ /*| A_CAST_INT*/)
146#define ARG_TXQUEUELEN (A_ARG_REQ /*| A_CAST_INT*/)
147#define ARG_MEM_START (A_ARG_REQ | A_MAP_ULONG)
Eric Andersen72f9a422001-10-28 05:12:20 +0000148#define ARG_IO_ADDR (A_ARG_REQ | A_MAP_ULONG)
Manuel Novoa III df351d62001-03-08 22:57:00 +0000149#define ARG_IRQ (A_ARG_REQ | A_MAP_UCHAR)
150#define ARG_DSTADDR (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE)
151#define ARG_NETMASK (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_NETMASK)
Manuel Novoa III a6685582002-12-27 17:42:01 +0000152#define ARG_BROADCAST (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_BROADCAST)
Manuel Novoa III df351d62001-03-08 22:57:00 +0000153#define ARG_HW (A_ARG_REQ | A_CAST_HOST_COPY_IN_ETHER)
Eric Andersenb6e58d22003-11-14 03:04:08 +0000154#define ARG_POINTOPOINT (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER)
Manuel Novoa III df351d62001-03-08 22:57:00 +0000155#define ARG_KEEPALIVE (A_ARG_REQ | A_CAST_CHAR_PTR)
156#define ARG_OUTFILL (A_ARG_REQ | A_CAST_CHAR_PTR)
Manuel Novoa III a6685582002-12-27 17:42:01 +0000157#define ARG_HOSTNAME (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_COLON_CHK | A_HOSTNAME)
Eric Andersen51b8bd62002-07-03 11:46:38 +0000158#define ARG_ADD_DEL (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER)
Manuel Novoa III df351d62001-03-08 22:57:00 +0000159
160
161/*
162 * Set up the tables. Warning! They must have corresponding order!
163 */
164
165struct arg1opt {
166 const char *name;
Rob Landley0d383012005-05-03 22:30:08 +0000167 int selector;
Manuel Novoa III df351d62001-03-08 22:57:00 +0000168 unsigned short ifr_offset;
169};
170
171struct options {
172 const char *name;
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000173#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
Manuel Novoa III a6685582002-12-27 17:42:01 +0000174 const unsigned int flags:6;
175 const unsigned int arg_flags:10;
176#else
Manuel Novoa III df351d62001-03-08 22:57:00 +0000177 const unsigned char flags;
Manuel Novoa III 4fb0b512001-08-10 06:02:23 +0000178 const unsigned char arg_flags;
Manuel Novoa III a6685582002-12-27 17:42:01 +0000179#endif
Manuel Novoa III df351d62001-03-08 22:57:00 +0000180 const unsigned short selector;
181};
182
183#define ifreq_offsetof(x) offsetof(struct ifreq, x)
184
185static const struct arg1opt Arg1Opt[] = {
Manuel Novoa III a6685582002-12-27 17:42:01 +0000186 {"SIOCSIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric)},
187 {"SIOCSIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu)},
188 {"SIOCSIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen)},
Manuel Novoa III df351d62001-03-08 22:57:00 +0000189 {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)},
190 {"SIOCSIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask)},
191 {"SIOCSIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr)},
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000192#if ENABLE_FEATURE_IFCONFIG_HW
Manuel Novoa III a6685582002-12-27 17:42:01 +0000193 {"SIOCSIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr)},
Manuel Novoa III df351d62001-03-08 22:57:00 +0000194#endif
195 {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)},
Eric Andersenf15d4da2001-03-06 00:48:59 +0000196#ifdef SIOCSKEEPALIVE
Manuel Novoa III df351d62001-03-08 22:57:00 +0000197 {"SIOCSKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data)},
Eric Andersenf15d4da2001-03-06 00:48:59 +0000198#endif
199#ifdef SIOCSOUTFILL
Manuel Novoa III a6685582002-12-27 17:42:01 +0000200 {"SIOCSOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data)},
Eric Andersenf15d4da2001-03-06 00:48:59 +0000201#endif
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000202#if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ
Manuel Novoa III a6685582002-12-27 17:42:01 +0000203 {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.mem_start)},
204 {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr)},
205 {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.irq)},
Manuel Novoa III df351d62001-03-08 22:57:00 +0000206#endif
207 /* Last entry if for unmatched (possibly hostname) arg. */
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000208#if ENABLE_FEATURE_IPV6
Manuel Novoa III a6685582002-12-27 17:42:01 +0000209 {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */
210 {"SIOCDIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */
Eric Andersen51b8bd62002-07-03 11:46:38 +0000211#endif
Manuel Novoa III a6685582002-12-27 17:42:01 +0000212 {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)},
Eric Andersenf15d4da2001-03-06 00:48:59 +0000213};
214
Manuel Novoa III df351d62001-03-08 22:57:00 +0000215static const struct options OptArray[] = {
Manuel Novoa III a6685582002-12-27 17:42:01 +0000216 {"metric", N_ARG, ARG_METRIC, 0},
217 {"mtu", N_ARG, ARG_MTU, 0},
218 {"txqueuelen", N_ARG, ARG_TXQUEUELEN, 0},
219 {"dstaddr", N_ARG, ARG_DSTADDR, 0},
220 {"netmask", N_ARG, ARG_NETMASK, 0},
221 {"broadcast", N_ARG | M_CLR, ARG_BROADCAST, IFF_BROADCAST},
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000222#if ENABLE_FEATURE_IFCONFIG_HW
Manuel Novoa III a6685582002-12-27 17:42:01 +0000223 {"hw", N_ARG, ARG_HW, 0},
Manuel Novoa III df351d62001-03-08 22:57:00 +0000224#endif
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000225 {"pointopoint", N_ARG | M_CLR, ARG_POINTOPOINT, IFF_POINTOPOINT},
Manuel Novoa III df351d62001-03-08 22:57:00 +0000226#ifdef SIOCSKEEPALIVE
Manuel Novoa III a6685582002-12-27 17:42:01 +0000227 {"keepalive", N_ARG, ARG_KEEPALIVE, 0},
Manuel Novoa III df351d62001-03-08 22:57:00 +0000228#endif
229#ifdef SIOCSOUTFILL
Manuel Novoa III a6685582002-12-27 17:42:01 +0000230 {"outfill", N_ARG, ARG_OUTFILL, 0},
Manuel Novoa III df351d62001-03-08 22:57:00 +0000231#endif
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000232#if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ
Manuel Novoa III a6685582002-12-27 17:42:01 +0000233 {"mem_start", N_ARG, ARG_MEM_START, 0},
234 {"io_addr", N_ARG, ARG_IO_ADDR, 0},
235 {"irq", N_ARG, ARG_IRQ, 0},
Manuel Novoa III df351d62001-03-08 22:57:00 +0000236#endif
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000237#if ENABLE_FEATURE_IPV6
Manuel Novoa III a6685582002-12-27 17:42:01 +0000238 {"add", N_ARG, ARG_ADD_DEL, 0},
239 {"del", N_ARG, ARG_ADD_DEL, 0},
Eric Andersen51b8bd62002-07-03 11:46:38 +0000240#endif
Manuel Novoa III a6685582002-12-27 17:42:01 +0000241 {"arp", N_CLR | M_SET, 0, IFF_NOARP},
242 {"trailers", N_CLR | M_SET, 0, IFF_NOTRAILERS},
243 {"promisc", N_SET | M_CLR, 0, IFF_PROMISC},
244 {"multicast", N_SET | M_CLR, 0, IFF_MULTICAST},
245 {"allmulti", N_SET | M_CLR, 0, IFF_ALLMULTI},
246 {"dynamic", N_SET | M_CLR, 0, IFF_DYNAMIC},
247 {"up", N_SET, 0, (IFF_UP | IFF_RUNNING)},
248 {"down", N_CLR, 0, IFF_UP},
249 {NULL, 0, ARG_HOSTNAME, (IFF_UP | IFF_RUNNING)}
Manuel Novoa III df351d62001-03-08 22:57:00 +0000250};
Eric Andersenf15d4da2001-03-06 00:48:59 +0000251
Manuel Novoa III df351d62001-03-08 22:57:00 +0000252/*
253 * A couple of prototypes.
254 */
Eric Andersenec455952001-02-14 08:11:27 +0000255
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000256#if ENABLE_FEATURE_IFCONFIG_HW
257static int in_ether(const char *bufp, struct sockaddr *sap);
Manuel Novoa III df351d62001-03-08 22:57:00 +0000258#endif
259
Manuel Novoa III df351d62001-03-08 22:57:00 +0000260/*
261 * Our main function.
262 */
263
Denis Vlasenko06af2162007-02-03 17:28:39 +0000264int ifconfig_main(int argc, char **argv);
Manuel Novoa III df351d62001-03-08 22:57:00 +0000265int ifconfig_main(int argc, char **argv)
Eric Andersenec455952001-02-14 08:11:27 +0000266{
Manuel Novoa III df351d62001-03-08 22:57:00 +0000267 struct ifreq ifr;
268 struct sockaddr_in sai;
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000269#if ENABLE_FEATURE_IFCONFIG_HW
Manuel Novoa III df351d62001-03-08 22:57:00 +0000270 struct sockaddr sa;
271#endif
272 const struct arg1opt *a1op;
273 const struct options *op;
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000274 int sockfd; /* socket fd we use to manipulate stuff with */
Manuel Novoa III df351d62001-03-08 22:57:00 +0000275 int selector;
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000276#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
Manuel Novoa III a6685582002-12-27 17:42:01 +0000277 unsigned int mask;
278 unsigned int did_flags;
Glenn L McGrath393183d2003-05-26 14:07:50 +0000279 unsigned int sai_hostname, sai_netmask;
Manuel Novoa III a6685582002-12-27 17:42:01 +0000280#else
Manuel Novoa III 4fb0b512001-08-10 06:02:23 +0000281 unsigned char mask;
282 unsigned char did_flags;
Manuel Novoa III a6685582002-12-27 17:42:01 +0000283#endif
284 char *p;
Denis Vlasenko50962462006-11-21 20:32:38 +0000285 /*char host[128];*/
286 const char *host = NULL; /* make gcc happy */
Eric Andersenec455952001-02-14 08:11:27 +0000287
Manuel Novoa III df351d62001-03-08 22:57:00 +0000288 did_flags = 0;
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000289#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
Eric Andersen0cc7e622003-06-20 09:23:34 +0000290 sai_hostname = 0;
291 sai_netmask = 0;
Eric Andersen9d9cecf2003-06-21 09:05:49 +0000292#endif
Manuel Novoa III df351d62001-03-08 22:57:00 +0000293
Manuel Novoa III 68ea1d02001-03-12 09:57:59 +0000294 /* skip argv[0] */
295 ++argv;
296 --argc;
297
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000298#if ENABLE_FEATURE_IFCONFIG_STATUS
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000299 if (argc > 0 && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) {
Manuel Novoa III 68ea1d02001-03-12 09:57:59 +0000300 interface_opt_a = 1;
301 --argc;
302 ++argv;
303 }
304#endif
305
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000306 if (argc <= 1) {
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000307#if ENABLE_FEATURE_IFCONFIG_STATUS
Manuel Novoa III 68ea1d02001-03-12 09:57:59 +0000308 return display_interfaces(argc ? *argv : NULL);
Manuel Novoa III df351d62001-03-08 22:57:00 +0000309#else
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000310 bb_error_msg_and_die("no support for status display");
Manuel Novoa III df351d62001-03-08 22:57:00 +0000311#endif
Eric Andersenec455952001-02-14 08:11:27 +0000312 }
Manuel Novoa III df351d62001-03-08 22:57:00 +0000313
314 /* Create a channel to the NET kernel. */
Rob Landleyd921b2e2006-08-03 15:41:12 +0000315 sockfd = xsocket(AF_INET, SOCK_DGRAM, 0);
Manuel Novoa III df351d62001-03-08 22:57:00 +0000316
Manuel Novoa III df351d62001-03-08 22:57:00 +0000317 /* get interface name */
318 safe_strncpy(ifr.ifr_name, *argv, IFNAMSIZ);
319
320 /* Process the remaining arguments. */
321 while (*++argv != (char *) NULL) {
322 p = *argv;
323 mask = N_MASK;
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000324 if (*p == '-') { /* If the arg starts with '-'... */
325 ++p; /* advance past it and */
326 mask = M_MASK; /* set the appropriate mask. */
Manuel Novoa III df351d62001-03-08 22:57:00 +0000327 }
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000328 for (op = OptArray; op->name; op++) { /* Find table entry. */
329 if (strcmp(p, op->name) == 0) { /* If name matches... */
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000330 mask &= op->flags;
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000331 if (mask) /* set the mask and go. */
Bernhard Reutner-Fischer0b42a6a2005-10-07 11:34:50 +0000332 goto FOUND_ARG;
Manuel Novoa III df351d62001-03-08 22:57:00 +0000333 /* If we get here, there was a valid arg with an */
334 /* invalid '-' prefix. */
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000335 bb_error_msg_and_die("bad: '%s'", p-1);
Manuel Novoa III df351d62001-03-08 22:57:00 +0000336 }
337 }
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000338
Manuel Novoa III df351d62001-03-08 22:57:00 +0000339 /* We fell through, so treat as possible hostname. */
Denis Vlasenko80b8b392007-06-25 10:55:35 +0000340 a1op = Arg1Opt + ARRAY_SIZE(Arg1Opt) - 1;
Manuel Novoa III df351d62001-03-08 22:57:00 +0000341 mask = op->arg_flags;
342 goto HOSTNAME;
343
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000344 FOUND_ARG:
Manuel Novoa III df351d62001-03-08 22:57:00 +0000345 if (mask & ARG_MASK) {
346 mask = op->arg_flags;
347 a1op = Arg1Opt + (op - OptArray);
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000348 if (mask & A_NETMASK & did_flags)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000349 bb_show_usage();
Manuel Novoa III df351d62001-03-08 22:57:00 +0000350 if (*++argv == NULL) {
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000351 if (mask & A_ARG_REQ)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000352 bb_show_usage();
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000353 --argv;
354 mask &= A_SET_AFTER; /* just for broadcast */
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000355 } else { /* got an arg so process it */
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000356 HOSTNAME:
Manuel Novoa III a6685582002-12-27 17:42:01 +0000357 did_flags |= (mask & (A_NETMASK|A_HOSTNAME));
Manuel Novoa III df351d62001-03-08 22:57:00 +0000358 if (mask & A_CAST_HOST_COPY) {
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000359#if ENABLE_FEATURE_IFCONFIG_HW
Manuel Novoa III df351d62001-03-08 22:57:00 +0000360 if (mask & A_CAST_RESOLVE) {
361#endif
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000362#if ENABLE_FEATURE_IPV6
Eric Andersen51b8bd62002-07-03 11:46:38 +0000363 char *prefix;
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000364 int prefix_len = 0;
Eric Andersen51b8bd62002-07-03 11:46:38 +0000365#endif
Denis Vlasenko50962462006-11-21 20:32:38 +0000366 /*safe_strncpy(host, *argv, (sizeof host));*/
367 host = *argv;
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000368#if ENABLE_FEATURE_IPV6
Denis Vlasenko13858992006-10-08 12:49:22 +0000369 prefix = strchr(host, '/');
370 if (prefix) {
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000371 prefix_len = xatou_range(prefix + 1, 0, 128);
372 *prefix = '\0';
Eric Andersen51b8bd62002-07-03 11:46:38 +0000373 }
374#endif
Manuel Novoa III df351d62001-03-08 22:57:00 +0000375 sai.sin_family = AF_INET;
376 sai.sin_port = 0;
Denis Vlasenko7ca39212006-11-21 20:34:21 +0000377 if (!strcmp(host, bb_str_default)) {
Manuel Novoa III df351d62001-03-08 22:57:00 +0000378 /* Default is special, meaning 0.0.0.0. */
379 sai.sin_addr.s_addr = INADDR_ANY;
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000380 }
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000381#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000382 else if ((host[0] == '+' && !host[1]) && (mask & A_BROADCAST)
383 && (did_flags & (A_NETMASK|A_HOSTNAME)) == (A_NETMASK|A_HOSTNAME)
384 ) {
Manuel Novoa III a6685582002-12-27 17:42:01 +0000385 /* + is special, meaning broadcast is derived. */
386 sai.sin_addr.s_addr = (~sai_netmask) | (sai_hostname & sai_netmask);
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000387 }
Manuel Novoa III a6685582002-12-27 17:42:01 +0000388#endif
Denis Vlasenko10944522007-02-04 02:40:27 +0000389 else {
Denis Vlasenko58875ae2007-03-22 22:22:10 +0000390 len_and_sockaddr *lsa;
Denis Vlasenko1787e222007-03-22 18:56:00 +0000391 if (strcmp(host, "inet") == 0)
392 continue; /* compat stuff */
Denis Vlasenko58875ae2007-03-22 22:22:10 +0000393 lsa = xhost2sockaddr(host, 0);
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000394#if ENABLE_FEATURE_IPV6
Denis Vlasenko10944522007-02-04 02:40:27 +0000395 if (lsa->sa.sa_family == AF_INET6) {
396 int sockfd6;
397 struct in6_ifreq ifr6;
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000398
Denis Vlasenko10944522007-02-04 02:40:27 +0000399 memcpy((char *) &ifr6.ifr6_addr,
400 (char *) &(lsa->sin6.sin6_addr),
401 sizeof(struct in6_addr));
Eric Andersen51b8bd62002-07-03 11:46:38 +0000402
Denis Vlasenko10944522007-02-04 02:40:27 +0000403 /* Create a channel to the NET kernel. */
404 sockfd6 = xsocket(AF_INET6, SOCK_DGRAM, 0);
405 if (ioctl(sockfd6, SIOGIFINDEX, &ifr) < 0)
406 bb_perror_msg_and_die("SIOGIFINDEX");
407 ifr6.ifr6_ifindex = ifr.ifr_ifindex;
408 ifr6.ifr6_prefixlen = prefix_len;
409 if (ioctl(sockfd6, a1op->selector, &ifr6) < 0)
410 bb_perror_msg_and_die(a1op->name);
411 if (ENABLE_FEATURE_CLEAN_UP)
412 free(lsa);
413 continue;
414 }
Eric Andersen51b8bd62002-07-03 11:46:38 +0000415#endif
Denis Vlasenko10944522007-02-04 02:40:27 +0000416 sai.sin_addr = lsa->sin.sin_addr;
417 if (ENABLE_FEATURE_CLEAN_UP)
418 free(lsa);
Manuel Novoa III df351d62001-03-08 22:57:00 +0000419 }
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000420#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000421 if (mask & A_HOSTNAME)
Manuel Novoa III a6685582002-12-27 17:42:01 +0000422 sai_hostname = sai.sin_addr.s_addr;
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000423 if (mask & A_NETMASK)
Manuel Novoa III a6685582002-12-27 17:42:01 +0000424 sai_netmask = sai.sin_addr.s_addr;
Manuel Novoa III a6685582002-12-27 17:42:01 +0000425#endif
Manuel Novoa III df351d62001-03-08 22:57:00 +0000426 p = (char *) &sai;
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000427#if ENABLE_FEATURE_IFCONFIG_HW
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000428 } else { /* A_CAST_HOST_COPY_IN_ETHER */
Manuel Novoa III df351d62001-03-08 22:57:00 +0000429 /* This is the "hw" arg case. */
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000430 if (strcmp("ether", *argv) || !*++argv)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000431 bb_show_usage();
Denis Vlasenko50962462006-11-21 20:32:38 +0000432 /*safe_strncpy(host, *argv, sizeof(host));*/
433 host = *argv;
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000434 if (in_ether(host, &sa))
435 bb_error_msg_and_die("invalid hw-addr %s", host);
Manuel Novoa III df351d62001-03-08 22:57:00 +0000436 p = (char *) &sa;
437 }
438#endif
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000439 memcpy( (((char *)&ifr) + a1op->ifr_offset),
Manuel Novoa III df351d62001-03-08 22:57:00 +0000440 p, sizeof(struct sockaddr));
441 } else {
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000442 /* FIXME: error check?? */
Rob Landleyc819ca92005-11-22 17:09:14 +0000443 unsigned long i = strtoul(*argv, NULL, 0);
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000444 p = ((char *)&ifr) + a1op->ifr_offset;
445#if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ
Manuel Novoa III df351d62001-03-08 22:57:00 +0000446 if (mask & A_MAP_TYPE) {
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000447 if (ioctl(sockfd, SIOCGIFMAP, &ifr) < 0)
448 bb_perror_msg_and_die("SIOCGIFMAP");
449 if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR)
Manuel Novoa III df351d62001-03-08 22:57:00 +0000450 *((unsigned char *) p) = i;
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000451 else if (mask & A_MAP_USHORT)
Manuel Novoa III df351d62001-03-08 22:57:00 +0000452 *((unsigned short *) p) = i;
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000453 else
Manuel Novoa III df351d62001-03-08 22:57:00 +0000454 *((unsigned long *) p) = i;
Manuel Novoa III df351d62001-03-08 22:57:00 +0000455 } else
456#endif
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000457 if (mask & A_CAST_CHAR_PTR)
Manuel Novoa III df351d62001-03-08 22:57:00 +0000458 *((caddr_t *) p) = (caddr_t) i;
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000459 else /* A_CAST_INT */
Manuel Novoa III df351d62001-03-08 22:57:00 +0000460 *((int *) p) = i;
Manuel Novoa III df351d62001-03-08 22:57:00 +0000461 }
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000462
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000463 if (ioctl(sockfd, a1op->selector, &ifr) < 0)
464 bb_perror_msg_and_die(a1op->name);
Manuel Novoa III df351d62001-03-08 22:57:00 +0000465#ifdef QUESTIONABLE_ALIAS_CASE
466 if (mask & A_COLON_CHK) {
467 /*
468 * Don't do the set_flag() if the address is an alias with
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000469 * a '-' at the end, since it's deleted already! - Roman
Manuel Novoa III df351d62001-03-08 22:57:00 +0000470 *
471 * Should really use regex.h here, not sure though how well
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000472 * it'll go with the cross-platform support etc.
Manuel Novoa III df351d62001-03-08 22:57:00 +0000473 */
474 char *ptr;
475 short int found_colon = 0;
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000476 for (ptr = ifr.ifr_name; *ptr; ptr++)
477 if (*ptr == ':')
Manuel Novoa III df351d62001-03-08 22:57:00 +0000478 found_colon++;
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000479 if (found_colon && ptr[-1] == '-')
Manuel Novoa III df351d62001-03-08 22:57:00 +0000480 continue;
Manuel Novoa III df351d62001-03-08 22:57:00 +0000481 }
482#endif
483 }
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000484 if (!(mask & A_SET_AFTER))
Manuel Novoa III df351d62001-03-08 22:57:00 +0000485 continue;
Manuel Novoa III df351d62001-03-08 22:57:00 +0000486 mask = N_SET;
487 }
488
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000489 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0)
490 bb_perror_msg_and_die("SIOCGIFFLAGS");
491 selector = op->selector;
492 if (mask & SET_MASK)
493 ifr.ifr_flags |= selector;
494 else
495 ifr.ifr_flags &= ~selector;
496 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0)
497 bb_perror_msg_and_die("SIOCSIFFLAGS");
Denis Vlasenkobf0a2012006-12-26 10:42:51 +0000498 } /* while () */
Manuel Novoa III df351d62001-03-08 22:57:00 +0000499
Denis Vlasenko2813ce22006-11-27 10:03:21 +0000500 if (ENABLE_FEATURE_CLEAN_UP)
501 close(sockfd);
502 return 0;
Eric Andersenec455952001-02-14 08:11:27 +0000503}
504
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000505#if ENABLE_FEATURE_IFCONFIG_HW
Eric Andersenec455952001-02-14 08:11:27 +0000506/* Input an Ethernet address and convert to binary. */
Denis Vlasenko04b30ba2006-11-21 14:26:37 +0000507static int in_ether(const char *bufp, struct sockaddr *sap)
Eric Andersenec455952001-02-14 08:11:27 +0000508{
Mike Frysinger3978abd2005-09-24 23:52:09 +0000509 char *ptr;
Manuel Novoa III df351d62001-03-08 22:57:00 +0000510 int i, j;
511 unsigned char val;
512 unsigned char c;
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000513
Eric Andersenec455952001-02-14 08:11:27 +0000514 sap->sa_family = ARPHRD_ETHER;
515 ptr = sap->sa_data;
Glenn L McGrathbaf55a82002-08-22 18:22:10 +0000516
Manuel Novoa III a6685582002-12-27 17:42:01 +0000517 i = 0;
518 do {
519 j = val = 0;
Manuel Novoa III df351d62001-03-08 22:57:00 +0000520
521 /* We might get a semicolon here - not required. */
522 if (i && (*bufp == ':')) {
Eric Andersenec455952001-02-14 08:11:27 +0000523 bufp++;
Manuel Novoa III df351d62001-03-08 22:57:00 +0000524 }
525
Manuel Novoa III a6685582002-12-27 17:42:01 +0000526 do {
Manuel Novoa III df351d62001-03-08 22:57:00 +0000527 c = *bufp;
Manuel Novoa III a6685582002-12-27 17:42:01 +0000528 if (((unsigned char)(c - '0')) <= 9) {
Manuel Novoa III df351d62001-03-08 22:57:00 +0000529 c -= '0';
Manuel Novoa III a6685582002-12-27 17:42:01 +0000530 } else if (((unsigned char)((c|0x20) - 'a')) <= 5) {
531 c = (c|0x20) - ('a'-10);
Manuel Novoa III df351d62001-03-08 22:57:00 +0000532 } else if (j && (c == ':' || c == 0)) {
533 break;
534 } else {
535 return -1;
536 }
537 ++bufp;
538 val <<= 4;
539 val += c;
Manuel Novoa III a6685582002-12-27 17:42:01 +0000540 } while (++j < 2);
Manuel Novoa III df351d62001-03-08 22:57:00 +0000541 *ptr++ = val;
Manuel Novoa III a6685582002-12-27 17:42:01 +0000542 } while (++i < ETH_ALEN);
Eric Andersenec455952001-02-14 08:11:27 +0000543
Denis Vlasenkod9e15f22006-11-27 16:49:55 +0000544 return *bufp; /* Error if we don't end at end of string. */
Eric Andersenf15d4da2001-03-06 00:48:59 +0000545}
546#endif