blob: 5fed60a078939735901679fc3bcfbb8fd431f83f
1 | /* vi: set sw=4 ts=4: */ |
2 | /* 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 | * |
10 | * Authors of the original ifconfig was: |
11 | * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> |
12 | * |
13 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
14 | */ |
15 | |
16 | /* |
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 | * |
23 | * Still missing: media, tunnel. |
24 | * |
25 | * 2002-04-20 |
26 | * IPV6 support added by Bart Visscher <magick@linux-fan.com> |
27 | */ |
28 | //config:config IFCONFIG |
29 | //config: bool "ifconfig" |
30 | //config: default y |
31 | //config: select PLATFORM_LINUX |
32 | //config: help |
33 | //config: Ifconfig is used to configure the kernel-resident network interfaces. |
34 | //config: |
35 | //config:config FEATURE_IFCONFIG_STATUS |
36 | //config: bool "Enable status reporting output (+7k)" |
37 | //config: default y |
38 | //config: depends on IFCONFIG |
39 | //config: help |
40 | //config: If ifconfig is called with no arguments it will display the status |
41 | //config: of the currently active interfaces. |
42 | //config: |
43 | //config:config FEATURE_IFCONFIG_SLIP |
44 | //config: bool "Enable slip-specific options \"keepalive\" and \"outfill\"" |
45 | //config: default y |
46 | //config: depends on IFCONFIG |
47 | //config: help |
48 | //config: Allow "keepalive" and "outfill" support for SLIP. If you're not |
49 | //config: planning on using serial lines, leave this unchecked. |
50 | //config: |
51 | //config:config FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
52 | //config: bool "Enable options \"mem_start\", \"io_addr\", and \"irq\"" |
53 | //config: default y |
54 | //config: depends on IFCONFIG |
55 | //config: help |
56 | //config: Allow the start address for shared memory, start address for I/O, |
57 | //config: and/or the interrupt line used by the specified device. |
58 | //config: |
59 | //config:config FEATURE_IFCONFIG_HW |
60 | //config: bool "Enable option \"hw\" (ether only)" |
61 | //config: default y |
62 | //config: depends on IFCONFIG |
63 | //config: help |
64 | //config: Set the hardware address of this interface, if the device driver |
65 | //config: supports this operation. Currently, we only support the 'ether' |
66 | //config: class. |
67 | //config: |
68 | //config:config FEATURE_IFCONFIG_BROADCAST_PLUS |
69 | //config: bool "Set the broadcast automatically" |
70 | //config: default y |
71 | //config: depends on IFCONFIG |
72 | //config: help |
73 | //config: Setting this will make ifconfig attempt to find the broadcast |
74 | //config: automatically if the value '+' is used. |
75 | |
76 | //applet:IF_IFCONFIG(APPLET(ifconfig, BB_DIR_SBIN, BB_SUID_DROP)) |
77 | |
78 | //kbuild:lib-$(CONFIG_IFCONFIG) += ifconfig.o interface.o |
79 | |
80 | //usage:#define ifconfig_trivial_usage |
81 | //usage: IF_FEATURE_IFCONFIG_STATUS("[-a]") " interface [address]" |
82 | //usage:#define ifconfig_full_usage "\n\n" |
83 | //usage: "Configure a network interface\n" |
84 | //usage: "\n" |
85 | //usage: IF_FEATURE_IPV6( |
86 | //usage: " [add ADDRESS[/PREFIXLEN]]\n") |
87 | //usage: IF_FEATURE_IPV6( |
88 | //usage: " [del ADDRESS[/PREFIXLEN]]\n") |
89 | //usage: " [[-]broadcast [ADDRESS]] [[-]pointopoint [ADDRESS]]\n" |
90 | //usage: " [netmask ADDRESS] [dstaddr ADDRESS]\n" |
91 | //usage: IF_FEATURE_IFCONFIG_SLIP( |
92 | //usage: " [outfill NN] [keepalive NN]\n") |
93 | //usage: " " IF_FEATURE_IFCONFIG_HW("[hw ether" IF_FEATURE_HWIB("|infiniband")" ADDRESS] ") "[metric NN] [mtu NN]\n" |
94 | //usage: " [[-]trailers] [[-]arp] [[-]allmulti]\n" |
95 | //usage: " [multicast] [[-]promisc] [txqueuelen NN] [[-]dynamic]\n" |
96 | //usage: IF_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ( |
97 | //usage: " [mem_start NN] [io_addr NN] [irq NN]\n") |
98 | //usage: " [up|down] ..." |
99 | |
100 | #include "libbb.h" |
101 | #include "inet_common.h" |
102 | #include <net/if.h> |
103 | #include <net/if_arp.h> |
104 | #include <netinet/in.h> |
105 | #ifdef HAVE_NET_ETHERNET_H |
106 | # include <net/ethernet.h> |
107 | #endif |
108 | |
109 | #if ENABLE_FEATURE_IFCONFIG_SLIP |
110 | # include <linux/if_slip.h> |
111 | #endif |
112 | |
113 | /* I don't know if this is needed for busybox or not. Anyone? */ |
114 | #define QUESTIONABLE_ALIAS_CASE |
115 | |
116 | |
117 | /* Defines for glibc2.0 users. */ |
118 | #ifndef SIOCSIFTXQLEN |
119 | # define SIOCSIFTXQLEN 0x8943 |
120 | # define SIOCGIFTXQLEN 0x8942 |
121 | #endif |
122 | |
123 | /* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */ |
124 | #ifndef ifr_qlen |
125 | # define ifr_qlen ifr_ifru.ifru_mtu |
126 | #endif |
127 | |
128 | #ifndef IFF_DYNAMIC |
129 | # define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */ |
130 | #endif |
131 | |
132 | #if ENABLE_FEATURE_IPV6 && !defined(BIONIC_ICS) |
133 | struct in6_ifreq { |
134 | struct in6_addr ifr6_addr; |
135 | uint32_t ifr6_prefixlen; |
136 | int ifr6_ifindex; |
137 | }; |
138 | #endif |
139 | |
140 | /* |
141 | * Here are the bit masks for the "flags" member of struct options below. |
142 | * N_ signifies no arg prefix; M_ signifies arg prefixed by '-'. |
143 | * CLR clears the flag; SET sets the flag; ARG signifies (optional) arg. |
144 | */ |
145 | #define N_CLR 0x01 |
146 | #define M_CLR 0x02 |
147 | #define N_SET 0x04 |
148 | #define M_SET 0x08 |
149 | #define N_ARG 0x10 |
150 | #define M_ARG 0x20 |
151 | |
152 | #define M_MASK (M_CLR | M_SET | M_ARG) |
153 | #define N_MASK (N_CLR | N_SET | N_ARG) |
154 | #define SET_MASK (N_SET | M_SET) |
155 | #define CLR_MASK (N_CLR | M_CLR) |
156 | #define SET_CLR_MASK (SET_MASK | CLR_MASK) |
157 | #define ARG_MASK (M_ARG | N_ARG) |
158 | |
159 | /* |
160 | * Here are the bit masks for the "arg_flags" member of struct options below. |
161 | */ |
162 | |
163 | /* |
164 | * cast type: |
165 | * 00 int |
166 | * 01 char * |
167 | * 02 HOST_COPY in_ether |
168 | * 03 HOST_COPY INET_resolve |
169 | */ |
170 | #define A_CAST_TYPE 0x03 |
171 | /* |
172 | * map type: |
173 | * 00 not a map type (mem_start, io_addr, irq) |
174 | * 04 memstart (unsigned long) |
175 | * 08 io_addr (unsigned short) |
176 | * 0C irq (unsigned char) |
177 | */ |
178 | #define A_MAP_TYPE 0x0C |
179 | #define A_ARG_REQ 0x10 /* Set if an arg is required. */ |
180 | #define A_NETMASK 0x20 /* Set if netmask (check for multiple sets). */ |
181 | #define A_SET_AFTER 0x40 /* Set a flag at the end. */ |
182 | #define A_COLON_CHK 0x80 /* Is this needed? See below. */ |
183 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
184 | #define A_HOSTNAME 0x100 /* Set if it is ip addr. */ |
185 | #define A_BROADCAST 0x200 /* Set if it is broadcast addr. */ |
186 | #else |
187 | #define A_HOSTNAME 0 |
188 | #define A_BROADCAST 0 |
189 | #endif |
190 | |
191 | /* |
192 | * These defines are for dealing with the A_CAST_TYPE field. |
193 | */ |
194 | #define A_CAST_CHAR_PTR 0x01 |
195 | #define A_CAST_RESOLVE 0x01 |
196 | #define A_CAST_HOST_COPY 0x02 |
197 | #define A_CAST_HOST_COPY_IN_ETHER A_CAST_HOST_COPY |
198 | #define A_CAST_HOST_COPY_RESOLVE (A_CAST_HOST_COPY | A_CAST_RESOLVE) |
199 | |
200 | /* |
201 | * These defines are for dealing with the A_MAP_TYPE field. |
202 | */ |
203 | #define A_MAP_ULONG 0x04 /* memstart */ |
204 | #define A_MAP_USHORT 0x08 /* io_addr */ |
205 | #define A_MAP_UCHAR 0x0C /* irq */ |
206 | |
207 | /* |
208 | * Define the bit masks signifying which operations to perform for each arg. |
209 | */ |
210 | |
211 | #define ARG_METRIC (A_ARG_REQ /*| A_CAST_INT*/) |
212 | #define ARG_MTU (A_ARG_REQ /*| A_CAST_INT*/) |
213 | #define ARG_TXQUEUELEN (A_ARG_REQ /*| A_CAST_INT*/) |
214 | #define ARG_MEM_START (A_ARG_REQ | A_MAP_ULONG) |
215 | #define ARG_IO_ADDR (A_ARG_REQ | A_MAP_ULONG) |
216 | #define ARG_IRQ (A_ARG_REQ | A_MAP_UCHAR) |
217 | #define ARG_DSTADDR (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE) |
218 | #define ARG_NETMASK (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_NETMASK) |
219 | #define ARG_BROADCAST (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_BROADCAST) |
220 | #define ARG_HW (A_ARG_REQ | A_CAST_HOST_COPY_IN_ETHER) |
221 | #define ARG_POINTOPOINT (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) |
222 | #define ARG_KEEPALIVE (A_ARG_REQ | A_CAST_CHAR_PTR) |
223 | #define ARG_OUTFILL (A_ARG_REQ | A_CAST_CHAR_PTR) |
224 | #define ARG_HOSTNAME (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_COLON_CHK | A_HOSTNAME) |
225 | #define ARG_ADD_DEL (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) |
226 | |
227 | |
228 | struct arg1opt { |
229 | const char *name; |
230 | unsigned short selector; |
231 | unsigned short ifr_offset; |
232 | }; |
233 | |
234 | struct options { |
235 | const char *name; |
236 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
237 | const unsigned int flags:6; |
238 | const unsigned int arg_flags:10; |
239 | #else |
240 | const unsigned char flags; |
241 | const unsigned char arg_flags; |
242 | #endif |
243 | const unsigned short selector; |
244 | }; |
245 | |
246 | #define ifreq_offsetof(x) offsetof(struct ifreq, x) |
247 | |
248 | /* |
249 | * Set up the tables. Warning! They must have corresponding order! |
250 | */ |
251 | |
252 | static const struct arg1opt Arg1Opt[] = { |
253 | { "SIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric) }, |
254 | { "SIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu) }, |
255 | { "SIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen) }, |
256 | { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) }, |
257 | { "SIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask) }, |
258 | { "SIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr) }, |
259 | #if ENABLE_FEATURE_IFCONFIG_HW |
260 | { "SIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr) }, |
261 | #endif |
262 | { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) }, |
263 | #ifdef SIOCSKEEPALIVE |
264 | { "SKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data) }, |
265 | #endif |
266 | #ifdef SIOCSOUTFILL |
267 | { "SOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data) }, |
268 | #endif |
269 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
270 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.mem_start) }, |
271 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr) }, |
272 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.irq) }, |
273 | #endif |
274 | #if ENABLE_FEATURE_IPV6 |
275 | { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ |
276 | { "DIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ |
277 | #endif |
278 | /* Last entry is for unmatched (assumed to be hostname/address) arg. */ |
279 | { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, |
280 | }; |
281 | |
282 | static const struct options OptArray[] = { |
283 | { "metric", N_ARG, ARG_METRIC, 0 }, |
284 | { "mtu", N_ARG, ARG_MTU, 0 }, |
285 | { "txqueuelen", N_ARG, ARG_TXQUEUELEN, 0 }, |
286 | { "dstaddr", N_ARG, ARG_DSTADDR, 0 }, |
287 | { "netmask", N_ARG, ARG_NETMASK, 0 }, |
288 | { "broadcast", N_ARG | M_CLR, ARG_BROADCAST, IFF_BROADCAST }, |
289 | #if ENABLE_FEATURE_IFCONFIG_HW |
290 | { "hw", N_ARG, ARG_HW, 0 }, |
291 | #endif |
292 | { "pointopoint", N_ARG | M_CLR, ARG_POINTOPOINT, IFF_POINTOPOINT }, |
293 | #ifdef SIOCSKEEPALIVE |
294 | { "keepalive", N_ARG, ARG_KEEPALIVE, 0 }, |
295 | #endif |
296 | #ifdef SIOCSOUTFILL |
297 | { "outfill", N_ARG, ARG_OUTFILL, 0 }, |
298 | #endif |
299 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
300 | { "mem_start", N_ARG, ARG_MEM_START, 0 }, |
301 | { "io_addr", N_ARG, ARG_IO_ADDR, 0 }, |
302 | { "irq", N_ARG, ARG_IRQ, 0 }, |
303 | #endif |
304 | #if ENABLE_FEATURE_IPV6 |
305 | { "add", N_ARG, ARG_ADD_DEL, 0 }, |
306 | { "del", N_ARG, ARG_ADD_DEL, 0 }, |
307 | #endif |
308 | { "arp", N_CLR | M_SET, 0, IFF_NOARP }, |
309 | { "trailers", N_CLR | M_SET, 0, IFF_NOTRAILERS }, |
310 | { "promisc", N_SET | M_CLR, 0, IFF_PROMISC }, |
311 | { "multicast", N_SET | M_CLR, 0, IFF_MULTICAST }, |
312 | { "allmulti", N_SET | M_CLR, 0, IFF_ALLMULTI }, |
313 | { "dynamic", N_SET | M_CLR, 0, IFF_DYNAMIC }, |
314 | { "up", N_SET, 0, (IFF_UP | IFF_RUNNING) }, |
315 | { "down", N_CLR, 0, IFF_UP }, |
316 | { NULL, 0, ARG_HOSTNAME, (IFF_UP | IFF_RUNNING) } |
317 | }; |
318 | |
319 | int ifconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
320 | int ifconfig_main(int argc UNUSED_PARAM, char **argv) |
321 | { |
322 | struct ifreq ifr; |
323 | struct sockaddr_in sai; |
324 | #if ENABLE_FEATURE_IFCONFIG_HW |
325 | struct sockaddr sa; |
326 | #endif |
327 | const struct arg1opt *a1op; |
328 | const struct options *op; |
329 | int sockfd; /* socket fd we use to manipulate stuff with */ |
330 | int selector; |
331 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
332 | unsigned int mask; |
333 | unsigned int did_flags; |
334 | unsigned int sai_hostname, sai_netmask; |
335 | #else |
336 | unsigned char mask; |
337 | unsigned char did_flags; |
338 | #endif |
339 | char *p; |
340 | /*char host[128];*/ |
341 | const char *host = NULL; /* make gcc happy */ |
342 | |
343 | did_flags = 0; |
344 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
345 | sai_hostname = 0; |
346 | sai_netmask = 0; |
347 | #endif |
348 | |
349 | /* skip argv[0] */ |
350 | ++argv; |
351 | |
352 | #if ENABLE_FEATURE_IFCONFIG_STATUS |
353 | if (argv[0] && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) { |
354 | interface_opt_a = 1; |
355 | ++argv; |
356 | } |
357 | #endif |
358 | |
359 | if (!argv[0] || !argv[1]) { /* one or no args */ |
360 | #if ENABLE_FEATURE_IFCONFIG_STATUS |
361 | return display_interfaces(argv[0] /* can be NULL */); |
362 | #else |
363 | bb_error_msg_and_die("no support for status display"); |
364 | #endif |
365 | } |
366 | |
367 | /* Create a channel to the NET kernel. */ |
368 | sockfd = xsocket(AF_INET, SOCK_DGRAM, 0); |
369 | |
370 | /* get interface name */ |
371 | strncpy_IFNAMSIZ(ifr.ifr_name, *argv); |
372 | |
373 | /* Process the remaining arguments. */ |
374 | while (*++argv != NULL) { |
375 | p = *argv; |
376 | mask = N_MASK; |
377 | if (*p == '-') { /* If the arg starts with '-'... */ |
378 | ++p; /* advance past it and */ |
379 | mask = M_MASK; /* set the appropriate mask. */ |
380 | } |
381 | for (op = OptArray; op->name; op++) { /* Find table entry. */ |
382 | if (strcmp(p, op->name) == 0) { /* If name matches... */ |
383 | mask &= op->flags; |
384 | if (mask) /* set the mask and go. */ |
385 | goto FOUND_ARG; |
386 | /* If we get here, there was a valid arg with an */ |
387 | /* invalid '-' prefix. */ |
388 | bb_error_msg_and_die("bad: '%s'", p-1); |
389 | } |
390 | } |
391 | |
392 | /* We fell through, so treat as possible hostname. */ |
393 | a1op = Arg1Opt + ARRAY_SIZE(Arg1Opt) - 1; |
394 | mask = op->arg_flags; |
395 | goto HOSTNAME; |
396 | |
397 | FOUND_ARG: |
398 | if (mask & ARG_MASK) { |
399 | mask = op->arg_flags; |
400 | if (mask & A_NETMASK & did_flags) |
401 | bb_show_usage(); |
402 | a1op = Arg1Opt + (op - OptArray); |
403 | if (*++argv == NULL) { |
404 | if (mask & A_ARG_REQ) |
405 | bb_show_usage(); |
406 | --argv; |
407 | mask &= A_SET_AFTER; /* just for broadcast */ |
408 | } else { /* got an arg so process it */ |
409 | HOSTNAME: |
410 | did_flags |= (mask & (A_NETMASK|A_HOSTNAME)); |
411 | if (mask & A_CAST_HOST_COPY) { |
412 | #if ENABLE_FEATURE_IFCONFIG_HW |
413 | if (mask & A_CAST_RESOLVE) { |
414 | #endif |
415 | host = *argv; |
416 | if (strcmp(host, "inet") == 0) |
417 | continue; /* compat stuff */ |
418 | sai.sin_family = AF_INET; |
419 | sai.sin_port = 0; |
420 | if (strcmp(host, "default") == 0) { |
421 | /* Default is special, meaning 0.0.0.0. */ |
422 | sai.sin_addr.s_addr = INADDR_ANY; |
423 | } |
424 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
425 | else if ((host[0] == '+' && !host[1]) |
426 | && (mask & A_BROADCAST) |
427 | && (did_flags & (A_NETMASK|A_HOSTNAME)) == (A_NETMASK|A_HOSTNAME) |
428 | ) { |
429 | /* + is special, meaning broadcast is derived. */ |
430 | sai.sin_addr.s_addr = (~sai_netmask) | (sai_hostname & sai_netmask); |
431 | } |
432 | #endif |
433 | else { |
434 | len_and_sockaddr *lsa; |
435 | #if ENABLE_FEATURE_IPV6 |
436 | char *prefix; |
437 | int prefix_len = 0; |
438 | prefix = strchr(host, '/'); |
439 | if (prefix) { |
440 | prefix_len = xatou_range(prefix + 1, 0, 128); |
441 | *prefix = '\0'; |
442 | } |
443 | resolve: |
444 | #endif |
445 | lsa = xhost2sockaddr(host, 0); |
446 | #if ENABLE_FEATURE_IPV6 |
447 | if (lsa->u.sa.sa_family != AF_INET6 && prefix) { |
448 | /* TODO: we do not support "ifconfig eth0 up 1.2.3.4/17". |
449 | * For now, just make it fail instead of silently ignoring "/17" part: |
450 | */ |
451 | *prefix = '/'; |
452 | goto resolve; |
453 | } |
454 | if (lsa->u.sa.sa_family == AF_INET6) { |
455 | int sockfd6; |
456 | struct in6_ifreq ifr6; |
457 | |
458 | sockfd6 = xsocket(AF_INET6, SOCK_DGRAM, 0); |
459 | xioctl(sockfd6, SIOCGIFINDEX, &ifr); |
460 | ifr6.ifr6_ifindex = ifr.ifr_ifindex; |
461 | ifr6.ifr6_prefixlen = prefix_len; |
462 | memcpy(&ifr6.ifr6_addr, |
463 | &lsa->u.sin6.sin6_addr, |
464 | sizeof(struct in6_addr)); |
465 | ioctl_or_perror_and_die(sockfd6, a1op->selector, &ifr6, "SIOC%s", a1op->name); |
466 | if (ENABLE_FEATURE_CLEAN_UP) |
467 | free(lsa); |
468 | continue; |
469 | } |
470 | #endif |
471 | sai.sin_addr = lsa->u.sin.sin_addr; |
472 | if (ENABLE_FEATURE_CLEAN_UP) |
473 | free(lsa); |
474 | } |
475 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
476 | if (mask & A_HOSTNAME) |
477 | sai_hostname = sai.sin_addr.s_addr; |
478 | if (mask & A_NETMASK) |
479 | sai_netmask = sai.sin_addr.s_addr; |
480 | #endif |
481 | p = (char *) &sai; |
482 | #if ENABLE_FEATURE_IFCONFIG_HW |
483 | } else { /* A_CAST_HOST_COPY_IN_ETHER */ |
484 | /* This is the "hw" arg case. */ |
485 | smalluint hw_class = index_in_substrings("ether\0" |
486 | IF_FEATURE_HWIB("infiniband\0"), *argv) + 1; |
487 | if (!hw_class || !*++argv) |
488 | bb_show_usage(); |
489 | host = *argv; |
490 | if (hw_class == 1 ? in_ether(host, &sa) : in_ib(host, &sa)) |
491 | bb_error_msg_and_die("invalid hw-addr %s", host); |
492 | p = (char *) &sa; |
493 | } |
494 | #endif |
495 | memcpy( ((char *)&ifr) + a1op->ifr_offset, |
496 | p, sizeof(struct sockaddr)); |
497 | } else { |
498 | /* FIXME: error check?? */ |
499 | unsigned long i = strtoul(*argv, NULL, 0); |
500 | p = ((char *)&ifr) + a1op->ifr_offset; |
501 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
502 | if (mask & A_MAP_TYPE) { |
503 | xioctl(sockfd, SIOCGIFMAP, &ifr); |
504 | if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR) |
505 | *(unsigned char *) p = i; |
506 | else if (mask & A_MAP_USHORT) |
507 | *(unsigned short *) p = i; |
508 | else |
509 | *(unsigned long *) p = i; |
510 | } else |
511 | #endif |
512 | if (mask & A_CAST_CHAR_PTR) |
513 | *(caddr_t *) p = (caddr_t) i; |
514 | else /* A_CAST_INT */ |
515 | *(int *) p = i; |
516 | } |
517 | |
518 | ioctl_or_perror_and_die(sockfd, a1op->selector, &ifr, "SIOC%s", a1op->name); |
519 | #ifdef QUESTIONABLE_ALIAS_CASE |
520 | if (mask & A_COLON_CHK) { |
521 | /* |
522 | * Don't do the set_flag() if the address is an alias with |
523 | * a '-' at the end, since it's deleted already! - Roman |
524 | * |
525 | * Should really use regex.h here, not sure though how well |
526 | * it'll go with the cross-platform support etc. |
527 | */ |
528 | char *ptr; |
529 | short int found_colon = 0; |
530 | for (ptr = ifr.ifr_name; *ptr; ptr++) |
531 | if (*ptr == ':') |
532 | found_colon++; |
533 | if (found_colon && ptr[-1] == '-') |
534 | continue; |
535 | } |
536 | #endif |
537 | } |
538 | if (!(mask & A_SET_AFTER)) |
539 | continue; |
540 | mask = N_SET; |
541 | } /* if (mask & ARG_MASK) */ |
542 | |
543 | xioctl(sockfd, SIOCGIFFLAGS, &ifr); |
544 | selector = op->selector; |
545 | if (mask & SET_MASK) |
546 | ifr.ifr_flags |= selector; |
547 | else |
548 | ifr.ifr_flags &= ~selector; |
549 | xioctl(sockfd, SIOCSIFFLAGS, &ifr); |
550 | } /* while () */ |
551 | |
552 | if (ENABLE_FEATURE_CLEAN_UP) |
553 | close(sockfd); |
554 | return 0; |
555 | } |
556 |