blob: dcbb552d8790f305ea12a694ad74cdef54c55685
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 | |
29 | //usage:#define ifconfig_trivial_usage |
30 | //usage: IF_FEATURE_IFCONFIG_STATUS("[-a]") " interface [address]" |
31 | //usage:#define ifconfig_full_usage "\n\n" |
32 | //usage: "Configure a network interface\n" |
33 | //usage: "\n" |
34 | //usage: IF_FEATURE_IPV6( |
35 | //usage: " [add ADDRESS[/PREFIXLEN]]\n") |
36 | //usage: IF_FEATURE_IPV6( |
37 | //usage: " [del ADDRESS[/PREFIXLEN]]\n") |
38 | //usage: " [[-]broadcast [ADDRESS]] [[-]pointopoint [ADDRESS]]\n" |
39 | //usage: " [netmask ADDRESS] [dstaddr ADDRESS]\n" |
40 | //usage: IF_FEATURE_IFCONFIG_SLIP( |
41 | //usage: " [outfill NN] [keepalive NN]\n") |
42 | //usage: " " IF_FEATURE_IFCONFIG_HW("[hw ether" IF_FEATURE_HWIB("|infiniband")" ADDRESS] ") "[metric NN] [mtu NN]\n" |
43 | //usage: " [[-]trailers] [[-]arp] [[-]allmulti]\n" |
44 | //usage: " [multicast] [[-]promisc] [txqueuelen NN] [[-]dynamic]\n" |
45 | //usage: IF_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ( |
46 | //usage: " [mem_start NN] [io_addr NN] [irq NN]\n") |
47 | //usage: " [up|down] ..." |
48 | |
49 | #include "libbb.h" |
50 | #include "inet_common.h" |
51 | #include <net/if.h> |
52 | #include <net/if_arp.h> |
53 | #include <netinet/in.h> |
54 | #ifdef HAVE_NET_ETHERNET_H |
55 | # include <net/ethernet.h> |
56 | #endif |
57 | |
58 | #if ENABLE_FEATURE_IFCONFIG_SLIP |
59 | # include <linux/if_slip.h> |
60 | #endif |
61 | |
62 | /* I don't know if this is needed for busybox or not. Anyone? */ |
63 | #define QUESTIONABLE_ALIAS_CASE |
64 | |
65 | |
66 | /* Defines for glibc2.0 users. */ |
67 | #ifndef SIOCSIFTXQLEN |
68 | # define SIOCSIFTXQLEN 0x8943 |
69 | # define SIOCGIFTXQLEN 0x8942 |
70 | #endif |
71 | |
72 | /* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */ |
73 | #ifndef ifr_qlen |
74 | # define ifr_qlen ifr_ifru.ifru_mtu |
75 | #endif |
76 | |
77 | #ifndef IFF_DYNAMIC |
78 | # define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */ |
79 | #endif |
80 | |
81 | #if ENABLE_FEATURE_IPV6 && !defined(BIONIC_ICS) |
82 | struct in6_ifreq { |
83 | struct in6_addr ifr6_addr; |
84 | uint32_t ifr6_prefixlen; |
85 | int ifr6_ifindex; |
86 | }; |
87 | #endif |
88 | |
89 | /* |
90 | * Here are the bit masks for the "flags" member of struct options below. |
91 | * N_ signifies no arg prefix; M_ signifies arg prefixed by '-'. |
92 | * CLR clears the flag; SET sets the flag; ARG signifies (optional) arg. |
93 | */ |
94 | #define N_CLR 0x01 |
95 | #define M_CLR 0x02 |
96 | #define N_SET 0x04 |
97 | #define M_SET 0x08 |
98 | #define N_ARG 0x10 |
99 | #define M_ARG 0x20 |
100 | |
101 | #define M_MASK (M_CLR | M_SET | M_ARG) |
102 | #define N_MASK (N_CLR | N_SET | N_ARG) |
103 | #define SET_MASK (N_SET | M_SET) |
104 | #define CLR_MASK (N_CLR | M_CLR) |
105 | #define SET_CLR_MASK (SET_MASK | CLR_MASK) |
106 | #define ARG_MASK (M_ARG | N_ARG) |
107 | |
108 | /* |
109 | * Here are the bit masks for the "arg_flags" member of struct options below. |
110 | */ |
111 | |
112 | /* |
113 | * cast type: |
114 | * 00 int |
115 | * 01 char * |
116 | * 02 HOST_COPY in_ether |
117 | * 03 HOST_COPY INET_resolve |
118 | */ |
119 | #define A_CAST_TYPE 0x03 |
120 | /* |
121 | * map type: |
122 | * 00 not a map type (mem_start, io_addr, irq) |
123 | * 04 memstart (unsigned long) |
124 | * 08 io_addr (unsigned short) |
125 | * 0C irq (unsigned char) |
126 | */ |
127 | #define A_MAP_TYPE 0x0C |
128 | #define A_ARG_REQ 0x10 /* Set if an arg is required. */ |
129 | #define A_NETMASK 0x20 /* Set if netmask (check for multiple sets). */ |
130 | #define A_SET_AFTER 0x40 /* Set a flag at the end. */ |
131 | #define A_COLON_CHK 0x80 /* Is this needed? See below. */ |
132 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
133 | #define A_HOSTNAME 0x100 /* Set if it is ip addr. */ |
134 | #define A_BROADCAST 0x200 /* Set if it is broadcast addr. */ |
135 | #else |
136 | #define A_HOSTNAME 0 |
137 | #define A_BROADCAST 0 |
138 | #endif |
139 | |
140 | /* |
141 | * These defines are for dealing with the A_CAST_TYPE field. |
142 | */ |
143 | #define A_CAST_CHAR_PTR 0x01 |
144 | #define A_CAST_RESOLVE 0x01 |
145 | #define A_CAST_HOST_COPY 0x02 |
146 | #define A_CAST_HOST_COPY_IN_ETHER A_CAST_HOST_COPY |
147 | #define A_CAST_HOST_COPY_RESOLVE (A_CAST_HOST_COPY | A_CAST_RESOLVE) |
148 | |
149 | /* |
150 | * These defines are for dealing with the A_MAP_TYPE field. |
151 | */ |
152 | #define A_MAP_ULONG 0x04 /* memstart */ |
153 | #define A_MAP_USHORT 0x08 /* io_addr */ |
154 | #define A_MAP_UCHAR 0x0C /* irq */ |
155 | |
156 | /* |
157 | * Define the bit masks signifying which operations to perform for each arg. |
158 | */ |
159 | |
160 | #define ARG_METRIC (A_ARG_REQ /*| A_CAST_INT*/) |
161 | #define ARG_MTU (A_ARG_REQ /*| A_CAST_INT*/) |
162 | #define ARG_TXQUEUELEN (A_ARG_REQ /*| A_CAST_INT*/) |
163 | #define ARG_MEM_START (A_ARG_REQ | A_MAP_ULONG) |
164 | #define ARG_IO_ADDR (A_ARG_REQ | A_MAP_ULONG) |
165 | #define ARG_IRQ (A_ARG_REQ | A_MAP_UCHAR) |
166 | #define ARG_DSTADDR (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE) |
167 | #define ARG_NETMASK (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_NETMASK) |
168 | #define ARG_BROADCAST (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_BROADCAST) |
169 | #define ARG_HW (A_ARG_REQ | A_CAST_HOST_COPY_IN_ETHER) |
170 | #define ARG_POINTOPOINT (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) |
171 | #define ARG_KEEPALIVE (A_ARG_REQ | A_CAST_CHAR_PTR) |
172 | #define ARG_OUTFILL (A_ARG_REQ | A_CAST_CHAR_PTR) |
173 | #define ARG_HOSTNAME (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_COLON_CHK | A_HOSTNAME) |
174 | #define ARG_ADD_DEL (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) |
175 | |
176 | |
177 | struct arg1opt { |
178 | const char *name; |
179 | unsigned short selector; |
180 | unsigned short ifr_offset; |
181 | }; |
182 | |
183 | struct options { |
184 | const char *name; |
185 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
186 | const unsigned int flags:6; |
187 | const unsigned int arg_flags:10; |
188 | #else |
189 | const unsigned char flags; |
190 | const unsigned char arg_flags; |
191 | #endif |
192 | const unsigned short selector; |
193 | }; |
194 | |
195 | #define ifreq_offsetof(x) offsetof(struct ifreq, x) |
196 | |
197 | /* |
198 | * Set up the tables. Warning! They must have corresponding order! |
199 | */ |
200 | |
201 | static const struct arg1opt Arg1Opt[] = { |
202 | { "SIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric) }, |
203 | { "SIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu) }, |
204 | { "SIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen) }, |
205 | { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) }, |
206 | { "SIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask) }, |
207 | { "SIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr) }, |
208 | #if ENABLE_FEATURE_IFCONFIG_HW |
209 | { "SIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr) }, |
210 | #endif |
211 | { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) }, |
212 | #ifdef SIOCSKEEPALIVE |
213 | { "SKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data) }, |
214 | #endif |
215 | #ifdef SIOCSOUTFILL |
216 | { "SOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data) }, |
217 | #endif |
218 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
219 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.mem_start) }, |
220 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr) }, |
221 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.irq) }, |
222 | #endif |
223 | #if ENABLE_FEATURE_IPV6 |
224 | { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ |
225 | { "DIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ |
226 | #endif |
227 | /* Last entry is for unmatched (assumed to be hostname/address) arg. */ |
228 | { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, |
229 | }; |
230 | |
231 | static const struct options OptArray[] = { |
232 | { "metric", N_ARG, ARG_METRIC, 0 }, |
233 | { "mtu", N_ARG, ARG_MTU, 0 }, |
234 | { "txqueuelen", N_ARG, ARG_TXQUEUELEN, 0 }, |
235 | { "dstaddr", N_ARG, ARG_DSTADDR, 0 }, |
236 | { "netmask", N_ARG, ARG_NETMASK, 0 }, |
237 | { "broadcast", N_ARG | M_CLR, ARG_BROADCAST, IFF_BROADCAST }, |
238 | #if ENABLE_FEATURE_IFCONFIG_HW |
239 | { "hw", N_ARG, ARG_HW, 0 }, |
240 | #endif |
241 | { "pointopoint", N_ARG | M_CLR, ARG_POINTOPOINT, IFF_POINTOPOINT }, |
242 | #ifdef SIOCSKEEPALIVE |
243 | { "keepalive", N_ARG, ARG_KEEPALIVE, 0 }, |
244 | #endif |
245 | #ifdef SIOCSOUTFILL |
246 | { "outfill", N_ARG, ARG_OUTFILL, 0 }, |
247 | #endif |
248 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
249 | { "mem_start", N_ARG, ARG_MEM_START, 0 }, |
250 | { "io_addr", N_ARG, ARG_IO_ADDR, 0 }, |
251 | { "irq", N_ARG, ARG_IRQ, 0 }, |
252 | #endif |
253 | #if ENABLE_FEATURE_IPV6 |
254 | { "add", N_ARG, ARG_ADD_DEL, 0 }, |
255 | { "del", N_ARG, ARG_ADD_DEL, 0 }, |
256 | #endif |
257 | { "arp", N_CLR | M_SET, 0, IFF_NOARP }, |
258 | { "trailers", N_CLR | M_SET, 0, IFF_NOTRAILERS }, |
259 | { "promisc", N_SET | M_CLR, 0, IFF_PROMISC }, |
260 | { "multicast", N_SET | M_CLR, 0, IFF_MULTICAST }, |
261 | { "allmulti", N_SET | M_CLR, 0, IFF_ALLMULTI }, |
262 | { "dynamic", N_SET | M_CLR, 0, IFF_DYNAMIC }, |
263 | { "up", N_SET, 0, (IFF_UP | IFF_RUNNING) }, |
264 | { "down", N_CLR, 0, IFF_UP }, |
265 | { NULL, 0, ARG_HOSTNAME, (IFF_UP | IFF_RUNNING) } |
266 | }; |
267 | |
268 | int ifconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
269 | int ifconfig_main(int argc UNUSED_PARAM, char **argv) |
270 | { |
271 | struct ifreq ifr; |
272 | struct sockaddr_in sai; |
273 | #if ENABLE_FEATURE_IFCONFIG_HW |
274 | struct sockaddr sa; |
275 | #endif |
276 | const struct arg1opt *a1op; |
277 | const struct options *op; |
278 | int sockfd; /* socket fd we use to manipulate stuff with */ |
279 | int selector; |
280 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
281 | unsigned int mask; |
282 | unsigned int did_flags; |
283 | unsigned int sai_hostname, sai_netmask; |
284 | #else |
285 | unsigned char mask; |
286 | unsigned char did_flags; |
287 | #endif |
288 | char *p; |
289 | /*char host[128];*/ |
290 | const char *host = NULL; /* make gcc happy */ |
291 | |
292 | did_flags = 0; |
293 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
294 | sai_hostname = 0; |
295 | sai_netmask = 0; |
296 | #endif |
297 | |
298 | /* skip argv[0] */ |
299 | ++argv; |
300 | |
301 | #if ENABLE_FEATURE_IFCONFIG_STATUS |
302 | if (argv[0] && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) { |
303 | interface_opt_a = 1; |
304 | ++argv; |
305 | } |
306 | #endif |
307 | |
308 | if (!argv[0] || !argv[1]) { /* one or no args */ |
309 | #if ENABLE_FEATURE_IFCONFIG_STATUS |
310 | return display_interfaces(argv[0] /* can be 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 | strncpy_IFNAMSIZ(ifr.ifr_name, *argv); |
321 | |
322 | /* Process the remaining arguments. */ |
323 | while (*++argv != 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 + ARRAY_SIZE(Arg1Opt) - 1; |
343 | mask = op->arg_flags; |
344 | goto HOSTNAME; |
345 | |
346 | FOUND_ARG: |
347 | if (mask & ARG_MASK) { |
348 | mask = op->arg_flags; |
349 | if (mask & A_NETMASK & did_flags) |
350 | bb_show_usage(); |
351 | a1op = Arg1Opt + (op - OptArray); |
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 | host = *argv; |
365 | if (strcmp(host, "inet") == 0) |
366 | continue; /* compat stuff */ |
367 | sai.sin_family = AF_INET; |
368 | sai.sin_port = 0; |
369 | if (strcmp(host, "default") == 0) { |
370 | /* Default is special, meaning 0.0.0.0. */ |
371 | sai.sin_addr.s_addr = INADDR_ANY; |
372 | } |
373 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
374 | else if ((host[0] == '+' && !host[1]) |
375 | && (mask & A_BROADCAST) |
376 | && (did_flags & (A_NETMASK|A_HOSTNAME)) == (A_NETMASK|A_HOSTNAME) |
377 | ) { |
378 | /* + is special, meaning broadcast is derived. */ |
379 | sai.sin_addr.s_addr = (~sai_netmask) | (sai_hostname & sai_netmask); |
380 | } |
381 | #endif |
382 | else { |
383 | len_and_sockaddr *lsa; |
384 | #if ENABLE_FEATURE_IPV6 |
385 | char *prefix; |
386 | int prefix_len = 0; |
387 | prefix = strchr(host, '/'); |
388 | if (prefix) { |
389 | prefix_len = xatou_range(prefix + 1, 0, 128); |
390 | *prefix = '\0'; |
391 | } |
392 | resolve: |
393 | #endif |
394 | lsa = xhost2sockaddr(host, 0); |
395 | #if ENABLE_FEATURE_IPV6 |
396 | if (lsa->u.sa.sa_family != AF_INET6 && prefix) { |
397 | /* TODO: we do not support "ifconfig eth0 up 1.2.3.4/17". |
398 | * For now, just make it fail instead of silently ignoring "/17" part: |
399 | */ |
400 | *prefix = '/'; |
401 | goto resolve; |
402 | } |
403 | if (lsa->u.sa.sa_family == AF_INET6) { |
404 | int sockfd6; |
405 | struct in6_ifreq ifr6; |
406 | |
407 | sockfd6 = xsocket(AF_INET6, SOCK_DGRAM, 0); |
408 | xioctl(sockfd6, SIOCGIFINDEX, &ifr); |
409 | ifr6.ifr6_ifindex = ifr.ifr_ifindex; |
410 | ifr6.ifr6_prefixlen = prefix_len; |
411 | memcpy(&ifr6.ifr6_addr, |
412 | &lsa->u.sin6.sin6_addr, |
413 | sizeof(struct in6_addr)); |
414 | ioctl_or_perror_and_die(sockfd6, a1op->selector, &ifr6, "SIOC%s", a1op->name); |
415 | if (ENABLE_FEATURE_CLEAN_UP) |
416 | free(lsa); |
417 | continue; |
418 | } |
419 | #endif |
420 | sai.sin_addr = lsa->u.sin.sin_addr; |
421 | if (ENABLE_FEATURE_CLEAN_UP) |
422 | free(lsa); |
423 | } |
424 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
425 | if (mask & A_HOSTNAME) |
426 | sai_hostname = sai.sin_addr.s_addr; |
427 | if (mask & A_NETMASK) |
428 | sai_netmask = sai.sin_addr.s_addr; |
429 | #endif |
430 | p = (char *) &sai; |
431 | #if ENABLE_FEATURE_IFCONFIG_HW |
432 | } else { /* A_CAST_HOST_COPY_IN_ETHER */ |
433 | /* This is the "hw" arg case. */ |
434 | smalluint hw_class = index_in_substrings("ether\0" |
435 | IF_FEATURE_HWIB("infiniband\0"), *argv) + 1; |
436 | if (!hw_class || !*++argv) |
437 | bb_show_usage(); |
438 | host = *argv; |
439 | if (hw_class == 1 ? in_ether(host, &sa) : in_ib(host, &sa)) |
440 | bb_error_msg_and_die("invalid hw-addr %s", host); |
441 | p = (char *) &sa; |
442 | } |
443 | #endif |
444 | memcpy( ((char *)&ifr) + a1op->ifr_offset, |
445 | p, sizeof(struct sockaddr)); |
446 | } else { |
447 | /* FIXME: error check?? */ |
448 | unsigned long i = strtoul(*argv, NULL, 0); |
449 | p = ((char *)&ifr) + a1op->ifr_offset; |
450 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
451 | if (mask & A_MAP_TYPE) { |
452 | xioctl(sockfd, SIOCGIFMAP, &ifr); |
453 | if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR) |
454 | *(unsigned char *) p = i; |
455 | else if (mask & A_MAP_USHORT) |
456 | *(unsigned short *) p = i; |
457 | else |
458 | *(unsigned long *) p = i; |
459 | } else |
460 | #endif |
461 | if (mask & A_CAST_CHAR_PTR) |
462 | *(caddr_t *) p = (caddr_t) i; |
463 | else /* A_CAST_INT */ |
464 | *(int *) p = i; |
465 | } |
466 | |
467 | ioctl_or_perror_and_die(sockfd, a1op->selector, &ifr, "SIOC%s", a1op->name); |
468 | #ifdef QUESTIONABLE_ALIAS_CASE |
469 | if (mask & A_COLON_CHK) { |
470 | /* |
471 | * Don't do the set_flag() if the address is an alias with |
472 | * a '-' at the end, since it's deleted already! - Roman |
473 | * |
474 | * Should really use regex.h here, not sure though how well |
475 | * it'll go with the cross-platform support etc. |
476 | */ |
477 | char *ptr; |
478 | short int found_colon = 0; |
479 | for (ptr = ifr.ifr_name; *ptr; ptr++) |
480 | if (*ptr == ':') |
481 | found_colon++; |
482 | if (found_colon && ptr[-1] == '-') |
483 | continue; |
484 | } |
485 | #endif |
486 | } |
487 | if (!(mask & A_SET_AFTER)) |
488 | continue; |
489 | mask = N_SET; |
490 | } /* if (mask & ARG_MASK) */ |
491 | |
492 | xioctl(sockfd, SIOCGIFFLAGS, &ifr); |
493 | selector = op->selector; |
494 | if (mask & SET_MASK) |
495 | ifr.ifr_flags |= selector; |
496 | else |
497 | ifr.ifr_flags &= ~selector; |
498 | xioctl(sockfd, SIOCSIFFLAGS, &ifr); |
499 | } /* while () */ |
500 | |
501 | if (ENABLE_FEATURE_CLEAN_UP) |
502 | close(sockfd); |
503 | return 0; |
504 | } |
505 |