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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 16061 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
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 tarball for details. |
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 | |
29 | #include <net/if.h> |
30 | #include <net/if_arp.h> |
31 | #include <netinet/in.h> |
32 | #if defined(__GLIBC__) && __GLIBC__ >=2 && __GLIBC_MINOR__ >= 1 |
33 | #include <netpacket/packet.h> |
34 | #include <net/ethernet.h> |
35 | #else |
36 | #include <sys/types.h> |
37 | #include <netinet/if_ether.h> |
38 | #endif |
39 | #include "inet_common.h" |
40 | #include "busybox.h" |
41 | |
42 | #if ENABLE_FEATURE_IFCONFIG_SLIP |
43 | # include <net/if_slip.h> |
44 | #endif |
45 | |
46 | /* I don't know if this is needed for busybox or not. Anyone? */ |
47 | #define QUESTIONABLE_ALIAS_CASE |
48 | |
49 | |
50 | /* Defines for glibc2.0 users. */ |
51 | #ifndef SIOCSIFTXQLEN |
52 | # define SIOCSIFTXQLEN 0x8943 |
53 | # define SIOCGIFTXQLEN 0x8942 |
54 | #endif |
55 | |
56 | /* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */ |
57 | #ifndef ifr_qlen |
58 | # define ifr_qlen ifr_ifru.ifru_mtu |
59 | #endif |
60 | |
61 | #ifndef IFF_DYNAMIC |
62 | # define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */ |
63 | #endif |
64 | |
65 | #if ENABLE_FEATURE_IPV6 |
66 | struct in6_ifreq { |
67 | struct in6_addr ifr6_addr; |
68 | uint32_t ifr6_prefixlen; |
69 | int ifr6_ifindex; |
70 | }; |
71 | #endif |
72 | |
73 | /* |
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. |
77 | */ |
78 | #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. */ |
116 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
117 | #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 |
123 | |
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) |
148 | #define ARG_IO_ADDR (A_ARG_REQ | A_MAP_ULONG) |
149 | #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) |
152 | #define ARG_BROADCAST (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_BROADCAST) |
153 | #define ARG_HW (A_ARG_REQ | A_CAST_HOST_COPY_IN_ETHER) |
154 | #define ARG_POINTOPOINT (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) |
155 | #define ARG_KEEPALIVE (A_ARG_REQ | A_CAST_CHAR_PTR) |
156 | #define ARG_OUTFILL (A_ARG_REQ | A_CAST_CHAR_PTR) |
157 | #define ARG_HOSTNAME (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_COLON_CHK | A_HOSTNAME) |
158 | #define ARG_ADD_DEL (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) |
159 | |
160 | |
161 | /* |
162 | * Set up the tables. Warning! They must have corresponding order! |
163 | */ |
164 | |
165 | struct arg1opt { |
166 | const char *name; |
167 | int selector; |
168 | unsigned short ifr_offset; |
169 | }; |
170 | |
171 | struct options { |
172 | const char *name; |
173 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
174 | const unsigned int flags:6; |
175 | const unsigned int arg_flags:10; |
176 | #else |
177 | const unsigned char flags; |
178 | const unsigned char arg_flags; |
179 | #endif |
180 | const unsigned short selector; |
181 | }; |
182 | |
183 | #define ifreq_offsetof(x) offsetof(struct ifreq, x) |
184 | |
185 | static const struct arg1opt Arg1Opt[] = { |
186 | {"SIOCSIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric)}, |
187 | {"SIOCSIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu)}, |
188 | {"SIOCSIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen)}, |
189 | {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)}, |
190 | {"SIOCSIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask)}, |
191 | {"SIOCSIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr)}, |
192 | #if ENABLE_FEATURE_IFCONFIG_HW |
193 | {"SIOCSIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr)}, |
194 | #endif |
195 | {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)}, |
196 | #ifdef SIOCSKEEPALIVE |
197 | {"SIOCSKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data)}, |
198 | #endif |
199 | #ifdef SIOCSOUTFILL |
200 | {"SIOCSOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data)}, |
201 | #endif |
202 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
203 | {"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)}, |
206 | #endif |
207 | /* Last entry if for unmatched (possibly hostname) arg. */ |
208 | #if ENABLE_FEATURE_IPV6 |
209 | {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */ |
210 | {"SIOCDIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */ |
211 | #endif |
212 | {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)}, |
213 | }; |
214 | |
215 | static const struct options OptArray[] = { |
216 | {"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}, |
222 | #if ENABLE_FEATURE_IFCONFIG_HW |
223 | {"hw", N_ARG, ARG_HW, 0}, |
224 | #endif |
225 | {"pointopoint", N_ARG | M_CLR, ARG_POINTOPOINT, IFF_POINTOPOINT}, |
226 | #ifdef SIOCSKEEPALIVE |
227 | {"keepalive", N_ARG, ARG_KEEPALIVE, 0}, |
228 | #endif |
229 | #ifdef SIOCSOUTFILL |
230 | {"outfill", N_ARG, ARG_OUTFILL, 0}, |
231 | #endif |
232 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
233 | {"mem_start", N_ARG, ARG_MEM_START, 0}, |
234 | {"io_addr", N_ARG, ARG_IO_ADDR, 0}, |
235 | {"irq", N_ARG, ARG_IRQ, 0}, |
236 | #endif |
237 | #if ENABLE_FEATURE_IPV6 |
238 | {"add", N_ARG, ARG_ADD_DEL, 0}, |
239 | {"del", N_ARG, ARG_ADD_DEL, 0}, |
240 | #endif |
241 | {"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)} |
250 | }; |
251 | |
252 | /* |
253 | * A couple of prototypes. |
254 | */ |
255 | |
256 | #if ENABLE_FEATURE_IFCONFIG_HW |
257 | static int in_ether(const char *bufp, struct sockaddr *sap); |
258 | #endif |
259 | |
260 | /* |
261 | * Our main function. |
262 | */ |
263 | |
264 | int ifconfig_main(int argc, char **argv) |
265 | { |
266 | struct ifreq ifr; |
267 | struct sockaddr_in sai; |
268 | #if ENABLE_FEATURE_IPV6 |
269 | struct sockaddr_in6 sai6; |
270 | #endif |
271 | #if ENABLE_FEATURE_IFCONFIG_HW |
272 | struct sockaddr sa; |
273 | #endif |
274 | const struct arg1opt *a1op; |
275 | const struct options *op; |
276 | int sockfd; /* socket fd we use to manipulate stuff with */ |
277 | int selector; |
278 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
279 | unsigned int mask; |
280 | unsigned int did_flags; |
281 | unsigned int sai_hostname, sai_netmask; |
282 | #else |
283 | unsigned char mask; |
284 | unsigned char did_flags; |
285 | #endif |
286 | char *p; |
287 | /*char host[128];*/ |
288 | const char *host = NULL; /* make gcc happy */ |
289 | |
290 | did_flags = 0; |
291 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
292 | sai_hostname = 0; |
293 | sai_netmask = 0; |
294 | #endif |
295 | |
296 | /* skip argv[0] */ |
297 | ++argv; |
298 | --argc; |
299 | |
300 | #if ENABLE_FEATURE_IFCONFIG_STATUS |
301 | if (argc > 0 && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) { |
302 | interface_opt_a = 1; |
303 | --argc; |
304 | ++argv; |
305 | } |
306 | #endif |
307 | |
308 | if (argc <= 1) { |
309 | #if ENABLE_FEATURE_IFCONFIG_STATUS |
310 | return display_interfaces(argc ? *argv : NULL); |
311 | #else |
312 | bb_error_msg_and_die("no support for status display"); |
313 | #endif |
314 | } |
315 | |
316 | /* Create a channel to the NET kernel. */ |
317 | sockfd = xsocket(AF_INET, SOCK_DGRAM, 0); |
318 | |
319 | /* get interface name */ |
320 | safe_strncpy(ifr.ifr_name, *argv, IFNAMSIZ); |
321 | |
322 | /* Process the remaining arguments. */ |
323 | while (*++argv != (char *) NULL) { |
324 | p = *argv; |
325 | mask = N_MASK; |
326 | if (*p == '-') { /* If the arg starts with '-'... */ |
327 | ++p; /* advance past it and */ |
328 | mask = M_MASK; /* set the appropriate mask. */ |
329 | } |
330 | for (op = OptArray; op->name; op++) { /* Find table entry. */ |
331 | if (strcmp(p, op->name) == 0) { /* If name matches... */ |
332 | mask &= op->flags; |
333 | if (mask) /* set the mask and go. */ |
334 | goto FOUND_ARG; |
335 | /* If we get here, there was a valid arg with an */ |
336 | /* invalid '-' prefix. */ |
337 | bb_error_msg_and_die("bad: '%s'", p-1); |
338 | } |
339 | } |
340 | |
341 | /* We fell through, so treat as possible hostname. */ |
342 | a1op = Arg1Opt + (sizeof(Arg1Opt) / sizeof(Arg1Opt[0])) - 1; |
343 | mask = op->arg_flags; |
344 | goto HOSTNAME; |
345 | |
346 | FOUND_ARG: |
347 | if (mask & ARG_MASK) { |
348 | mask = op->arg_flags; |
349 | a1op = Arg1Opt + (op - OptArray); |
350 | if (mask & A_NETMASK & did_flags) |
351 | bb_show_usage(); |
352 | if (*++argv == NULL) { |
353 | if (mask & A_ARG_REQ) |
354 | bb_show_usage(); |
355 | --argv; |
356 | mask &= A_SET_AFTER; /* just for broadcast */ |
357 | } else { /* got an arg so process it */ |
358 | HOSTNAME: |
359 | did_flags |= (mask & (A_NETMASK|A_HOSTNAME)); |
360 | if (mask & A_CAST_HOST_COPY) { |
361 | #if ENABLE_FEATURE_IFCONFIG_HW |
362 | if (mask & A_CAST_RESOLVE) { |
363 | #endif |
364 | #if ENABLE_FEATURE_IPV6 |
365 | char *prefix; |
366 | int prefix_len = 0; |
367 | #endif |
368 | /*safe_strncpy(host, *argv, (sizeof host));*/ |
369 | host = *argv; |
370 | #if ENABLE_FEATURE_IPV6 |
371 | prefix = strchr(host, '/'); |
372 | if (prefix) { |
373 | prefix_len = xatou_range(prefix + 1, 0, 128); |
374 | *prefix = '\0'; |
375 | } |
376 | #endif |
377 | sai.sin_family = AF_INET; |
378 | sai.sin_port = 0; |
379 | if (!strcmp(host, bb_str_default)) { |
380 | /* Default is special, meaning 0.0.0.0. */ |
381 | sai.sin_addr.s_addr = INADDR_ANY; |
382 | } |
383 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
384 | else if ((host[0] == '+' && !host[1]) && (mask & A_BROADCAST) |
385 | && (did_flags & (A_NETMASK|A_HOSTNAME)) == (A_NETMASK|A_HOSTNAME) |
386 | ) { |
387 | /* + is special, meaning broadcast is derived. */ |
388 | sai.sin_addr.s_addr = (~sai_netmask) | (sai_hostname & sai_netmask); |
389 | } |
390 | #endif |
391 | #if ENABLE_FEATURE_IPV6 |
392 | else if (inet_pton(AF_INET6, host, &sai6.sin6_addr) > 0) { |
393 | int sockfd6; |
394 | struct in6_ifreq ifr6; |
395 | |
396 | memcpy((char *) &ifr6.ifr6_addr, |
397 | (char *) &sai6.sin6_addr, |
398 | sizeof(struct in6_addr)); |
399 | |
400 | /* Create a channel to the NET kernel. */ |
401 | sockfd6 = xsocket(AF_INET6, SOCK_DGRAM, 0); |
402 | if (ioctl(sockfd6, SIOGIFINDEX, &ifr) < 0) |
403 | bb_perror_msg_and_die("SIOGIFINDEX"); |
404 | ifr6.ifr6_ifindex = ifr.ifr_ifindex; |
405 | ifr6.ifr6_prefixlen = prefix_len; |
406 | if (ioctl(sockfd6, a1op->selector, &ifr6) < 0) |
407 | bb_perror_msg_and_die(a1op->name); |
408 | continue; |
409 | } |
410 | #endif |
411 | else if (inet_aton(host, &sai.sin_addr) == 0) { |
412 | /* It's not a dotted quad. */ |
413 | struct hostent *hp = xgethostbyname(host); |
414 | memcpy((char *) &sai.sin_addr, (char *) hp->h_addr_list[0], |
415 | sizeof(struct in_addr)); |
416 | } |
417 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
418 | if (mask & A_HOSTNAME) |
419 | sai_hostname = sai.sin_addr.s_addr; |
420 | if (mask & A_NETMASK) |
421 | sai_netmask = sai.sin_addr.s_addr; |
422 | #endif |
423 | p = (char *) &sai; |
424 | #if ENABLE_FEATURE_IFCONFIG_HW |
425 | } else { /* A_CAST_HOST_COPY_IN_ETHER */ |
426 | /* This is the "hw" arg case. */ |
427 | if (strcmp("ether", *argv) || !*++argv) |
428 | bb_show_usage(); |
429 | /*safe_strncpy(host, *argv, sizeof(host));*/ |
430 | host = *argv; |
431 | if (in_ether(host, &sa)) |
432 | bb_error_msg_and_die("invalid hw-addr %s", host); |
433 | p = (char *) &sa; |
434 | } |
435 | #endif |
436 | memcpy( (((char *)&ifr) + a1op->ifr_offset), |
437 | p, sizeof(struct sockaddr)); |
438 | } else { |
439 | /* FIXME: error check?? */ |
440 | unsigned long i = strtoul(*argv, NULL, 0); |
441 | p = ((char *)&ifr) + a1op->ifr_offset; |
442 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
443 | if (mask & A_MAP_TYPE) { |
444 | if (ioctl(sockfd, SIOCGIFMAP, &ifr) < 0) |
445 | bb_perror_msg_and_die("SIOCGIFMAP"); |
446 | if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR) |
447 | *((unsigned char *) p) = i; |
448 | else if (mask & A_MAP_USHORT) |
449 | *((unsigned short *) p) = i; |
450 | else |
451 | *((unsigned long *) p) = i; |
452 | } else |
453 | #endif |
454 | if (mask & A_CAST_CHAR_PTR) |
455 | *((caddr_t *) p) = (caddr_t) i; |
456 | else /* A_CAST_INT */ |
457 | *((int *) p) = i; |
458 | } |
459 | |
460 | if (ioctl(sockfd, a1op->selector, &ifr) < 0) |
461 | bb_perror_msg_and_die(a1op->name); |
462 | #ifdef QUESTIONABLE_ALIAS_CASE |
463 | if (mask & A_COLON_CHK) { |
464 | /* |
465 | * Don't do the set_flag() if the address is an alias with |
466 | * a '-' at the end, since it's deleted already! - Roman |
467 | * |
468 | * Should really use regex.h here, not sure though how well |
469 | * it'll go with the cross-platform support etc. |
470 | */ |
471 | char *ptr; |
472 | short int found_colon = 0; |
473 | for (ptr = ifr.ifr_name; *ptr; ptr++) |
474 | if (*ptr == ':') |
475 | found_colon++; |
476 | if (found_colon && ptr[-1] == '-') |
477 | continue; |
478 | } |
479 | #endif |
480 | } |
481 | if (!(mask & A_SET_AFTER)) |
482 | continue; |
483 | mask = N_SET; |
484 | } |
485 | |
486 | if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) |
487 | bb_perror_msg_and_die("SIOCGIFFLAGS"); |
488 | selector = op->selector; |
489 | if (mask & SET_MASK) |
490 | ifr.ifr_flags |= selector; |
491 | else |
492 | ifr.ifr_flags &= ~selector; |
493 | if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) |
494 | bb_perror_msg_and_die("SIOCSIFFLAGS"); |
495 | } /* while () */ |
496 | |
497 | if (ENABLE_FEATURE_CLEAN_UP) |
498 | close(sockfd); |
499 | return 0; |
500 | } |
501 | |
502 | #if ENABLE_FEATURE_IFCONFIG_HW |
503 | /* Input an Ethernet address and convert to binary. */ |
504 | static int in_ether(const char *bufp, struct sockaddr *sap) |
505 | { |
506 | char *ptr; |
507 | int i, j; |
508 | unsigned char val; |
509 | unsigned char c; |
510 | |
511 | sap->sa_family = ARPHRD_ETHER; |
512 | ptr = sap->sa_data; |
513 | |
514 | i = 0; |
515 | do { |
516 | j = val = 0; |
517 | |
518 | /* We might get a semicolon here - not required. */ |
519 | if (i && (*bufp == ':')) { |
520 | bufp++; |
521 | } |
522 | |
523 | do { |
524 | c = *bufp; |
525 | if (((unsigned char)(c - '0')) <= 9) { |
526 | c -= '0'; |
527 | } else if (((unsigned char)((c|0x20) - 'a')) <= 5) { |
528 | c = (c|0x20) - ('a'-10); |
529 | } else if (j && (c == ':' || c == 0)) { |
530 | break; |
531 | } else { |
532 | return -1; |
533 | } |
534 | ++bufp; |
535 | val <<= 4; |
536 | val += c; |
537 | } while (++j < 2); |
538 | *ptr++ = val; |
539 | } while (++i < ETH_ALEN); |
540 | |
541 | return *bufp; /* Error if we don't end at end of string. */ |
542 | } |
543 | #endif |