Contents of /tags/mkinitrd-6_3_1/busybox/networking/ifconfig.c
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Thu Aug 19 12:44:27 2010 UTC (14 years, 1 month ago) by niro
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Thu Aug 19 12:44:27 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 16089 byte(s)
tagged 'mkinitrd-6_3_1'
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 "libbb.h" |
40 | #include "inet_common.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 | unsigned short 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 | { "SIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric) }, |
187 | { "SIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu) }, |
188 | { "SIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen) }, |
189 | { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) }, |
190 | { "SIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask) }, |
191 | { "SIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr) }, |
192 | #if ENABLE_FEATURE_IFCONFIG_HW |
193 | { "SIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr) }, |
194 | #endif |
195 | { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) }, |
196 | #ifdef SIOCSKEEPALIVE |
197 | { "SKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data) }, |
198 | #endif |
199 | #ifdef SIOCSOUTFILL |
200 | { "SOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data) }, |
201 | #endif |
202 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
203 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.mem_start) }, |
204 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr) }, |
205 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.irq) }, |
206 | #endif |
207 | /* Last entry if for unmatched (possibly hostname) arg. */ |
208 | #if ENABLE_FEATURE_IPV6 |
209 | { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ |
210 | { "DIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ |
211 | #endif |
212 | { "SIFADDR", 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 | #if ENABLE_FEATURE_IFCONFIG_HW |
256 | static int in_ether(const char *bufp, struct sockaddr *sap); |
257 | #endif |
258 | |
259 | /* |
260 | * Our main function. |
261 | */ |
262 | int ifconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
263 | int ifconfig_main(int argc UNUSED_PARAM, char **argv) |
264 | { |
265 | struct ifreq ifr; |
266 | struct sockaddr_in sai; |
267 | #if ENABLE_FEATURE_IFCONFIG_HW |
268 | struct sockaddr sa; |
269 | #endif |
270 | const struct arg1opt *a1op; |
271 | const struct options *op; |
272 | int sockfd; /* socket fd we use to manipulate stuff with */ |
273 | int selector; |
274 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
275 | unsigned int mask; |
276 | unsigned int did_flags; |
277 | unsigned int sai_hostname, sai_netmask; |
278 | #else |
279 | unsigned char mask; |
280 | unsigned char did_flags; |
281 | #endif |
282 | char *p; |
283 | /*char host[128];*/ |
284 | const char *host = NULL; /* make gcc happy */ |
285 | |
286 | did_flags = 0; |
287 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
288 | sai_hostname = 0; |
289 | sai_netmask = 0; |
290 | #endif |
291 | |
292 | /* skip argv[0] */ |
293 | ++argv; |
294 | |
295 | #if ENABLE_FEATURE_IFCONFIG_STATUS |
296 | if (argv[0] && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) { |
297 | interface_opt_a = 1; |
298 | ++argv; |
299 | } |
300 | #endif |
301 | |
302 | if (!argv[0] || !argv[1]) { /* one or no args */ |
303 | #if ENABLE_FEATURE_IFCONFIG_STATUS |
304 | return display_interfaces(argv[0] /* can be NULL */); |
305 | #else |
306 | bb_error_msg_and_die("no support for status display"); |
307 | #endif |
308 | } |
309 | |
310 | /* Create a channel to the NET kernel. */ |
311 | sockfd = xsocket(AF_INET, SOCK_DGRAM, 0); |
312 | |
313 | /* get interface name */ |
314 | strncpy_IFNAMSIZ(ifr.ifr_name, *argv); |
315 | |
316 | /* Process the remaining arguments. */ |
317 | while (*++argv != (char *) NULL) { |
318 | p = *argv; |
319 | mask = N_MASK; |
320 | if (*p == '-') { /* If the arg starts with '-'... */ |
321 | ++p; /* advance past it and */ |
322 | mask = M_MASK; /* set the appropriate mask. */ |
323 | } |
324 | for (op = OptArray; op->name; op++) { /* Find table entry. */ |
325 | if (strcmp(p, op->name) == 0) { /* If name matches... */ |
326 | mask &= op->flags; |
327 | if (mask) /* set the mask and go. */ |
328 | goto FOUND_ARG; |
329 | /* If we get here, there was a valid arg with an */ |
330 | /* invalid '-' prefix. */ |
331 | bb_error_msg_and_die("bad: '%s'", p-1); |
332 | } |
333 | } |
334 | |
335 | /* We fell through, so treat as possible hostname. */ |
336 | a1op = Arg1Opt + ARRAY_SIZE(Arg1Opt) - 1; |
337 | mask = op->arg_flags; |
338 | goto HOSTNAME; |
339 | |
340 | FOUND_ARG: |
341 | if (mask & ARG_MASK) { |
342 | mask = op->arg_flags; |
343 | a1op = Arg1Opt + (op - OptArray); |
344 | if (mask & A_NETMASK & did_flags) |
345 | bb_show_usage(); |
346 | if (*++argv == NULL) { |
347 | if (mask & A_ARG_REQ) |
348 | bb_show_usage(); |
349 | --argv; |
350 | mask &= A_SET_AFTER; /* just for broadcast */ |
351 | } else { /* got an arg so process it */ |
352 | HOSTNAME: |
353 | did_flags |= (mask & (A_NETMASK|A_HOSTNAME)); |
354 | if (mask & A_CAST_HOST_COPY) { |
355 | #if ENABLE_FEATURE_IFCONFIG_HW |
356 | if (mask & A_CAST_RESOLVE) { |
357 | #endif |
358 | #if ENABLE_FEATURE_IPV6 |
359 | char *prefix; |
360 | int prefix_len = 0; |
361 | #endif |
362 | /*safe_strncpy(host, *argv, (sizeof host));*/ |
363 | host = *argv; |
364 | #if ENABLE_FEATURE_IPV6 |
365 | prefix = strchr(host, '/'); |
366 | if (prefix) { |
367 | prefix_len = xatou_range(prefix + 1, 0, 128); |
368 | *prefix = '\0'; |
369 | } |
370 | #endif |
371 | sai.sin_family = AF_INET; |
372 | sai.sin_port = 0; |
373 | if (!strcmp(host, bb_str_default)) { |
374 | /* Default is special, meaning 0.0.0.0. */ |
375 | sai.sin_addr.s_addr = INADDR_ANY; |
376 | } |
377 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
378 | else if ((host[0] == '+' && !host[1]) && (mask & A_BROADCAST) |
379 | && (did_flags & (A_NETMASK|A_HOSTNAME)) == (A_NETMASK|A_HOSTNAME) |
380 | ) { |
381 | /* + is special, meaning broadcast is derived. */ |
382 | sai.sin_addr.s_addr = (~sai_netmask) | (sai_hostname & sai_netmask); |
383 | } |
384 | #endif |
385 | else { |
386 | len_and_sockaddr *lsa; |
387 | if (strcmp(host, "inet") == 0) |
388 | continue; /* compat stuff */ |
389 | lsa = xhost2sockaddr(host, 0); |
390 | #if ENABLE_FEATURE_IPV6 |
391 | if (lsa->u.sa.sa_family == AF_INET6) { |
392 | int sockfd6; |
393 | struct in6_ifreq ifr6; |
394 | |
395 | memcpy((char *) &ifr6.ifr6_addr, |
396 | (char *) &(lsa->u.sin6.sin6_addr), |
397 | sizeof(struct in6_addr)); |
398 | |
399 | /* Create a channel to the NET kernel. */ |
400 | sockfd6 = xsocket(AF_INET6, SOCK_DGRAM, 0); |
401 | xioctl(sockfd6, SIOGIFINDEX, &ifr); |
402 | ifr6.ifr6_ifindex = ifr.ifr_ifindex; |
403 | ifr6.ifr6_prefixlen = prefix_len; |
404 | ioctl_or_perror_and_die(sockfd6, a1op->selector, &ifr6, "SIOC%s", a1op->name); |
405 | if (ENABLE_FEATURE_CLEAN_UP) |
406 | free(lsa); |
407 | continue; |
408 | } |
409 | #endif |
410 | sai.sin_addr = lsa->u.sin.sin_addr; |
411 | if (ENABLE_FEATURE_CLEAN_UP) |
412 | free(lsa); |
413 | } |
414 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
415 | if (mask & A_HOSTNAME) |
416 | sai_hostname = sai.sin_addr.s_addr; |
417 | if (mask & A_NETMASK) |
418 | sai_netmask = sai.sin_addr.s_addr; |
419 | #endif |
420 | p = (char *) &sai; |
421 | #if ENABLE_FEATURE_IFCONFIG_HW |
422 | } else { /* A_CAST_HOST_COPY_IN_ETHER */ |
423 | /* This is the "hw" arg case. */ |
424 | smalluint hw_class= index_in_substrings("ether\0" |
425 | IF_FEATURE_HWIB("infiniband\0"), *argv) + 1; |
426 | if (!hw_class || !*++argv) |
427 | bb_show_usage(); |
428 | /*safe_strncpy(host, *argv, sizeof(host));*/ |
429 | host = *argv; |
430 | if (hw_class == 1 ? in_ether(host, &sa) : in_ib(host, &sa)) |
431 | bb_error_msg_and_die("invalid hw-addr %s", host); |
432 | p = (char *) &sa; |
433 | } |
434 | #endif |
435 | memcpy( (((char *)&ifr) + a1op->ifr_offset), |
436 | p, sizeof(struct sockaddr)); |
437 | } else { |
438 | /* FIXME: error check?? */ |
439 | unsigned long i = strtoul(*argv, NULL, 0); |
440 | p = ((char *)&ifr) + a1op->ifr_offset; |
441 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
442 | if (mask & A_MAP_TYPE) { |
443 | xioctl(sockfd, SIOCGIFMAP, &ifr); |
444 | if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR) |
445 | *((unsigned char *) p) = i; |
446 | else if (mask & A_MAP_USHORT) |
447 | *((unsigned short *) p) = i; |
448 | else |
449 | *((unsigned long *) p) = i; |
450 | } else |
451 | #endif |
452 | if (mask & A_CAST_CHAR_PTR) |
453 | *((caddr_t *) p) = (caddr_t) i; |
454 | else /* A_CAST_INT */ |
455 | *((int *) p) = i; |
456 | } |
457 | |
458 | ioctl_or_perror_and_die(sockfd, a1op->selector, &ifr, "SIOC%s", a1op->name); |
459 | #ifdef QUESTIONABLE_ALIAS_CASE |
460 | if (mask & A_COLON_CHK) { |
461 | /* |
462 | * Don't do the set_flag() if the address is an alias with |
463 | * a '-' at the end, since it's deleted already! - Roman |
464 | * |
465 | * Should really use regex.h here, not sure though how well |
466 | * it'll go with the cross-platform support etc. |
467 | */ |
468 | char *ptr; |
469 | short int found_colon = 0; |
470 | for (ptr = ifr.ifr_name; *ptr; ptr++) |
471 | if (*ptr == ':') |
472 | found_colon++; |
473 | if (found_colon && ptr[-1] == '-') |
474 | continue; |
475 | } |
476 | #endif |
477 | } |
478 | if (!(mask & A_SET_AFTER)) |
479 | continue; |
480 | mask = N_SET; |
481 | } |
482 | |
483 | xioctl(sockfd, SIOCGIFFLAGS, &ifr); |
484 | selector = op->selector; |
485 | if (mask & SET_MASK) |
486 | ifr.ifr_flags |= selector; |
487 | else |
488 | ifr.ifr_flags &= ~selector; |
489 | xioctl(sockfd, SIOCSIFFLAGS, &ifr); |
490 | } /* while () */ |
491 | |
492 | if (ENABLE_FEATURE_CLEAN_UP) |
493 | close(sockfd); |
494 | return 0; |
495 | } |
496 | |
497 | #if ENABLE_FEATURE_IFCONFIG_HW |
498 | /* Input an Ethernet address and convert to binary. */ |
499 | static int in_ether(const char *bufp, struct sockaddr *sap) |
500 | { |
501 | char *ptr; |
502 | int i, j; |
503 | unsigned char val; |
504 | unsigned char c; |
505 | |
506 | sap->sa_family = ARPHRD_ETHER; |
507 | ptr = (char *) sap->sa_data; |
508 | |
509 | i = 0; |
510 | do { |
511 | j = val = 0; |
512 | |
513 | /* We might get a semicolon here - not required. */ |
514 | if (i && (*bufp == ':')) { |
515 | bufp++; |
516 | } |
517 | |
518 | do { |
519 | c = *bufp; |
520 | if (((unsigned char)(c - '0')) <= 9) { |
521 | c -= '0'; |
522 | } else if (((unsigned char)((c|0x20) - 'a')) <= 5) { |
523 | c = (c|0x20) - ('a'-10); |
524 | } else if (j && (c == ':' || c == 0)) { |
525 | break; |
526 | } else { |
527 | return -1; |
528 | } |
529 | ++bufp; |
530 | val <<= 4; |
531 | val += c; |
532 | } while (++j < 2); |
533 | *ptr++ = val; |
534 | } while (++i < ETH_ALEN); |
535 | |
536 | return *bufp; /* Error if we don't end at end of string. */ |
537 | } |
538 | #endif |