2 * Common ioctl functions.
3 * Copyright (C) 1997, 98 Kunihiro Ishiguro
5 * This file is part of GNU Zebra.
7 * GNU Zebra is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
12 * GNU Zebra is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Zebra; see the file COPYING. If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
32 #include "zebra/rib.h"
34 #include "zebra/interface.h"
36 #ifdef HAVE_BSD_LINK_DETECT
37 #include <net/if_media.h>
38 #endif /* HAVE_BSD_LINK_DETECT*/
40 extern struct zebra_privs_t zserv_privs
;
42 /* clear and set interface name string */
44 ifreq_set_name (struct ifreq
*ifreq
, struct interface
*ifp
)
46 strncpy (ifreq
->ifr_name
, ifp
->name
, IFNAMSIZ
);
49 /* call ioctl system call */
51 if_ioctl (u_long request
, caddr_t buffer
)
57 if (zserv_privs
.change(ZPRIVS_RAISE
))
58 zlog (NULL
, LOG_ERR
, "Can't raise privileges");
59 sock
= socket (AF_INET
, SOCK_DGRAM
, 0);
62 int save_errno
= errno
;
63 if (zserv_privs
.change(ZPRIVS_LOWER
))
64 zlog (NULL
, LOG_ERR
, "Can't lower privileges");
65 zlog_err("Cannot create UDP socket: %s", safe_strerror(save_errno
));
68 if ((ret
= ioctl (sock
, request
, buffer
)) < 0)
70 if (zserv_privs
.change(ZPRIVS_LOWER
))
71 zlog (NULL
, LOG_ERR
, "Can't lower privileges");
84 if_ioctl_ipv6 (u_long request
, caddr_t buffer
)
90 if (zserv_privs
.change(ZPRIVS_RAISE
))
91 zlog (NULL
, LOG_ERR
, "Can't raise privileges");
92 sock
= socket (AF_INET6
, SOCK_DGRAM
, 0);
95 int save_errno
= errno
;
96 if (zserv_privs
.change(ZPRIVS_LOWER
))
97 zlog (NULL
, LOG_ERR
, "Can't lower privileges");
98 zlog_err("Cannot create IPv6 datagram socket: %s",
99 safe_strerror(save_errno
));
103 if ((ret
= ioctl (sock
, request
, buffer
)) < 0)
105 if (zserv_privs
.change(ZPRIVS_LOWER
))
106 zlog (NULL
, LOG_ERR
, "Can't lower privileges");
116 #endif /* HAVE_IPV6 */
119 * get interface metric
120 * -- if value is not avaliable set -1
123 if_get_metric (struct interface
*ifp
)
128 ifreq_set_name (&ifreq
, ifp
);
130 if (if_ioctl (SIOCGIFMETRIC
, (caddr_t
) &ifreq
) < 0)
132 ifp
->metric
= ifreq
.ifr_metric
;
133 if (ifp
->metric
== 0)
135 #else /* SIOCGIFMETRIC */
137 #endif /* SIOCGIFMETRIC */
140 /* get interface MTU */
142 if_get_mtu (struct interface
*ifp
)
146 ifreq_set_name (&ifreq
, ifp
);
148 #if defined(SIOCGIFMTU)
149 if (if_ioctl (SIOCGIFMTU
, (caddr_t
) & ifreq
) < 0)
151 zlog_info ("Can't lookup mtu by ioctl(SIOCGIFMTU)");
152 ifp
->mtu6
= ifp
->mtu
= -1;
157 ifp
->mtu6
= ifp
->mtu
= ifreq
.ifr_metric
;
159 ifp
->mtu6
= ifp
->mtu
= ifreq
.ifr_mtu
;
163 zebra_interface_up_update(ifp
);
166 zlog (NULL
, LOG_INFO
, "Can't lookup mtu on this system");
167 ifp
->mtu6
= ifp
->mtu
= -1;
172 /* Interface address setting via netlink interface. */
174 if_set_prefix (struct interface
*ifp
, struct connected
*ifc
)
176 return kernel_address_add_ipv4 (ifp
, ifc
);
179 /* Interface address is removed using netlink interface. */
181 if_unset_prefix (struct interface
*ifp
, struct connected
*ifc
)
183 return kernel_address_delete_ipv4 (ifp
, ifc
);
185 #else /* ! HAVE_NETLINK */
186 #ifdef HAVE_STRUCT_IFALIASREQ
187 /* Set up interface's IP address, netmask (and broadcas? ). *BSD may
188 has ifaliasreq structure. */
190 if_set_prefix (struct interface
*ifp
, struct connected
*ifc
)
193 struct ifaliasreq addreq
;
194 struct sockaddr_in addr
;
195 struct sockaddr_in mask
;
196 struct prefix_ipv4
*p
;
198 p
= (struct prefix_ipv4
*) ifc
->address
;
199 rib_lookup_and_pushup (p
);
201 memset (&addreq
, 0, sizeof addreq
);
202 strncpy ((char *)&addreq
.ifra_name
, ifp
->name
, sizeof addreq
.ifra_name
);
204 memset (&addr
, 0, sizeof (struct sockaddr_in
));
205 addr
.sin_addr
= p
->prefix
;
206 addr
.sin_family
= p
->family
;
207 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
208 addr
.sin_len
= sizeof (struct sockaddr_in
);
210 memcpy (&addreq
.ifra_addr
, &addr
, sizeof (struct sockaddr_in
));
212 memset (&mask
, 0, sizeof (struct sockaddr_in
));
213 masklen2ip (p
->prefixlen
, &mask
.sin_addr
);
214 mask
.sin_family
= p
->family
;
215 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
216 mask
.sin_len
= sizeof (struct sockaddr_in
);
218 memcpy (&addreq
.ifra_mask
, &mask
, sizeof (struct sockaddr_in
));
220 ret
= if_ioctl (SIOCAIFADDR
, (caddr_t
) &addreq
);
226 /* Set up interface's IP address, netmask (and broadcas? ). *BSD may
227 has ifaliasreq structure. */
229 if_unset_prefix (struct interface
*ifp
, struct connected
*ifc
)
232 struct ifaliasreq addreq
;
233 struct sockaddr_in addr
;
234 struct sockaddr_in mask
;
235 struct prefix_ipv4
*p
;
237 p
= (struct prefix_ipv4
*)ifc
->address
;
239 memset (&addreq
, 0, sizeof addreq
);
240 strncpy ((char *)&addreq
.ifra_name
, ifp
->name
, sizeof addreq
.ifra_name
);
242 memset (&addr
, 0, sizeof (struct sockaddr_in
));
243 addr
.sin_addr
= p
->prefix
;
244 addr
.sin_family
= p
->family
;
245 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
246 addr
.sin_len
= sizeof (struct sockaddr_in
);
248 memcpy (&addreq
.ifra_addr
, &addr
, sizeof (struct sockaddr_in
));
250 memset (&mask
, 0, sizeof (struct sockaddr_in
));
251 masklen2ip (p
->prefixlen
, &mask
.sin_addr
);
252 mask
.sin_family
= p
->family
;
253 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
254 mask
.sin_len
= sizeof (struct sockaddr_in
);
256 memcpy (&addreq
.ifra_mask
, &mask
, sizeof (struct sockaddr_in
));
258 ret
= if_ioctl (SIOCDIFADDR
, (caddr_t
) &addreq
);
264 /* Set up interface's address, netmask (and broadcas? ). Linux or
265 Solaris uses ifname:number semantics to set IP address aliases. */
267 if_set_prefix (struct interface
*ifp
, struct connected
*ifc
)
271 struct sockaddr_in addr
;
272 struct sockaddr_in broad
;
273 struct sockaddr_in mask
;
274 struct prefix_ipv4 ifaddr
;
275 struct prefix_ipv4
*p
;
277 p
= (struct prefix_ipv4
*) ifc
->address
;
281 ifreq_set_name (&ifreq
, ifp
);
283 addr
.sin_addr
= p
->prefix
;
284 addr
.sin_family
= p
->family
;
285 memcpy (&ifreq
.ifr_addr
, &addr
, sizeof (struct sockaddr_in
));
286 ret
= if_ioctl (SIOCSIFADDR
, (caddr_t
) &ifreq
);
290 /* We need mask for make broadcast addr. */
291 masklen2ip (p
->prefixlen
, &mask
.sin_addr
);
293 if (if_is_broadcast (ifp
))
295 apply_mask_ipv4 (&ifaddr
);
296 addr
.sin_addr
= ifaddr
.prefix
;
298 broad
.sin_addr
.s_addr
= (addr
.sin_addr
.s_addr
| ~mask
.sin_addr
.s_addr
);
299 broad
.sin_family
= p
->family
;
301 memcpy (&ifreq
.ifr_broadaddr
, &broad
, sizeof (struct sockaddr_in
));
302 ret
= if_ioctl (SIOCSIFBRDADDR
, (caddr_t
) &ifreq
);
307 mask
.sin_family
= p
->family
;
309 memcpy (&mask
, &ifreq
.ifr_addr
, sizeof (mask
));
311 memcpy (&ifreq
.ifr_netmask
, &mask
, sizeof (struct sockaddr_in
));
313 ret
= if_ioctl (SIOCSIFNETMASK
, (caddr_t
) &ifreq
);
320 /* Set up interface's address, netmask (and broadcas? ). Linux or
321 Solaris uses ifname:number semantics to set IP address aliases. */
323 if_unset_prefix (struct interface
*ifp
, struct connected
*ifc
)
327 struct sockaddr_in addr
;
328 struct prefix_ipv4
*p
;
330 p
= (struct prefix_ipv4
*) ifc
->address
;
332 ifreq_set_name (&ifreq
, ifp
);
334 memset (&addr
, 0, sizeof (struct sockaddr_in
));
335 addr
.sin_family
= p
->family
;
336 memcpy (&ifreq
.ifr_addr
, &addr
, sizeof (struct sockaddr_in
));
337 ret
= if_ioctl (SIOCSIFADDR
, (caddr_t
) &ifreq
);
343 #endif /* HAVE_STRUCT_IFALIASREQ */
344 #endif /* HAVE_NETLINK */
346 /* get interface flags */
348 if_get_flags (struct interface
*ifp
)
352 #ifdef HAVE_BSD_LINK_DETECT
353 struct ifmediareq ifmr
;
354 #endif /* HAVE_BSD_LINK_DETECT */
356 ifreq_set_name (&ifreq
, ifp
);
358 ret
= if_ioctl (SIOCGIFFLAGS
, (caddr_t
) &ifreq
);
361 zlog_err("if_ioctl(SIOCGIFFLAGS) failed: %s", safe_strerror(errno
));
364 #ifdef HAVE_BSD_LINK_DETECT /* Detect BSD link-state at start-up */
365 (void) memset(&ifmr
, 0, sizeof(ifmr
));
366 strncpy (&ifmr
.ifm_name
, ifp
->name
, IFNAMSIZ
);
367 if (if_ioctl(SIOCGIFMEDIA
, (caddr_t
) &ifmr
) < 0)
369 zlog_err("if_ioctl(SIOCGIFMEDIA) failed: %s", safe_strerror(errno
));
372 if (ifmr
.ifm_status
& IFM_AVALID
) /* Link state is valid */
374 if (ifmr
.ifm_status
& IFM_ACTIVE
)
375 SET_FLAG(ifreq
.ifr_flags
, IFF_RUNNING
);
377 UNSET_FLAG(ifreq
.ifr_flags
, IFF_RUNNING
);
379 else /* Force always up */
380 SET_FLAG(ifreq
.ifr_flags
, IFF_RUNNING
);
381 #endif /* HAVE_BSD_LINK_DETECT */
383 if_flags_update (ifp
, (ifreq
.ifr_flags
& 0x0000ffff));
386 /* Set interface flags */
388 if_set_flags (struct interface
*ifp
, uint64_t flags
)
393 memset (&ifreq
, 0, sizeof(struct ifreq
));
394 ifreq_set_name (&ifreq
, ifp
);
396 ifreq
.ifr_flags
= ifp
->flags
;
397 ifreq
.ifr_flags
|= flags
;
399 ret
= if_ioctl (SIOCSIFFLAGS
, (caddr_t
) &ifreq
);
403 zlog_info ("can't set interface flags");
409 /* Unset interface's flag. */
411 if_unset_flags (struct interface
*ifp
, uint64_t flags
)
416 memset (&ifreq
, 0, sizeof(struct ifreq
));
417 ifreq_set_name (&ifreq
, ifp
);
419 ifreq
.ifr_flags
= ifp
->flags
;
420 ifreq
.ifr_flags
&= ~flags
;
422 ret
= if_ioctl (SIOCSIFFLAGS
, (caddr_t
) &ifreq
);
426 zlog_info ("can't unset interface flags");
436 /* linux/include/net/ipv6.h */
439 struct in6_addr ifr6_addr
;
440 u_int32_t ifr6_prefixlen
;
443 #endif /* _LINUX_IN6_H */
445 /* Interface's address add/delete functions. */
447 if_prefix_add_ipv6 (struct interface
*ifp
, struct connected
*ifc
)
450 struct prefix_ipv6
*p
;
451 struct in6_ifreq ifreq
;
453 p
= (struct prefix_ipv6
*) ifc
->address
;
455 memset (&ifreq
, 0, sizeof (struct in6_ifreq
));
457 memcpy (&ifreq
.ifr6_addr
, &p
->prefix
, sizeof (struct in6_addr
));
458 ifreq
.ifr6_ifindex
= ifp
->ifindex
;
459 ifreq
.ifr6_prefixlen
= p
->prefixlen
;
461 ret
= if_ioctl_ipv6 (SIOCSIFADDR
, (caddr_t
) &ifreq
);
467 if_prefix_delete_ipv6 (struct interface
*ifp
, struct connected
*ifc
)
470 struct prefix_ipv6
*p
;
471 struct in6_ifreq ifreq
;
473 p
= (struct prefix_ipv6
*) ifc
->address
;
475 memset (&ifreq
, 0, sizeof (struct in6_ifreq
));
477 memcpy (&ifreq
.ifr6_addr
, &p
->prefix
, sizeof (struct in6_addr
));
478 ifreq
.ifr6_ifindex
= ifp
->ifindex
;
479 ifreq
.ifr6_prefixlen
= p
->prefixlen
;
481 ret
= if_ioctl_ipv6 (SIOCDIFADDR
, (caddr_t
) &ifreq
);
485 #else /* LINUX_IPV6 */
486 #ifdef HAVE_STRUCT_IN6_ALIASREQ
487 #ifndef ND6_INFINITE_LIFETIME
488 #define ND6_INFINITE_LIFETIME 0xffffffffL
489 #endif /* ND6_INFINITE_LIFETIME */
491 if_prefix_add_ipv6 (struct interface
*ifp
, struct connected
*ifc
)
494 struct in6_aliasreq addreq
;
495 struct sockaddr_in6 addr
;
496 struct sockaddr_in6 mask
;
497 struct prefix_ipv6
*p
;
499 p
= (struct prefix_ipv6
* ) ifc
->address
;
501 memset (&addreq
, 0, sizeof addreq
);
502 strncpy ((char *)&addreq
.ifra_name
, ifp
->name
, sizeof addreq
.ifra_name
);
504 memset (&addr
, 0, sizeof (struct sockaddr_in6
));
505 addr
.sin6_addr
= p
->prefix
;
506 addr
.sin6_family
= p
->family
;
507 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
508 addr
.sin6_len
= sizeof (struct sockaddr_in6
);
510 memcpy (&addreq
.ifra_addr
, &addr
, sizeof (struct sockaddr_in6
));
512 memset (&mask
, 0, sizeof (struct sockaddr_in6
));
513 masklen2ip6 (p
->prefixlen
, &mask
.sin6_addr
);
514 mask
.sin6_family
= p
->family
;
515 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
516 mask
.sin6_len
= sizeof (struct sockaddr_in6
);
518 memcpy (&addreq
.ifra_prefixmask
, &mask
, sizeof (struct sockaddr_in6
));
520 addreq
.ifra_lifetime
.ia6t_vltime
= 0xffffffff;
521 addreq
.ifra_lifetime
.ia6t_pltime
= 0xffffffff;
523 #ifdef HAVE_STRUCT_IF6_ALIASREQ_IFRA_LIFETIME
524 addreq
.ifra_lifetime
.ia6t_pltime
= ND6_INFINITE_LIFETIME
;
525 addreq
.ifra_lifetime
.ia6t_vltime
= ND6_INFINITE_LIFETIME
;
528 ret
= if_ioctl_ipv6 (SIOCAIFADDR_IN6
, (caddr_t
) &addreq
);
535 if_prefix_delete_ipv6 (struct interface
*ifp
, struct connected
*ifc
)
538 struct in6_aliasreq addreq
;
539 struct sockaddr_in6 addr
;
540 struct sockaddr_in6 mask
;
541 struct prefix_ipv6
*p
;
543 p
= (struct prefix_ipv6
*) ifc
->address
;
545 memset (&addreq
, 0, sizeof addreq
);
546 strncpy ((char *)&addreq
.ifra_name
, ifp
->name
, sizeof addreq
.ifra_name
);
548 memset (&addr
, 0, sizeof (struct sockaddr_in6
));
549 addr
.sin6_addr
= p
->prefix
;
550 addr
.sin6_family
= p
->family
;
551 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
552 addr
.sin6_len
= sizeof (struct sockaddr_in6
);
554 memcpy (&addreq
.ifra_addr
, &addr
, sizeof (struct sockaddr_in6
));
556 memset (&mask
, 0, sizeof (struct sockaddr_in6
));
557 masklen2ip6 (p
->prefixlen
, &mask
.sin6_addr
);
558 mask
.sin6_family
= p
->family
;
559 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
560 mask
.sin6_len
= sizeof (struct sockaddr_in6
);
562 memcpy (&addreq
.ifra_prefixmask
, &mask
, sizeof (struct sockaddr_in6
));
564 #ifdef HAVE_STRUCT_IF6_ALIASREQ_IFRA_LIFETIME
565 addreq
.ifra_lifetime
.ia6t_pltime
= ND6_INFINITE_LIFETIME
;
566 addreq
.ifra_lifetime
.ia6t_vltime
= ND6_INFINITE_LIFETIME
;
569 ret
= if_ioctl_ipv6 (SIOCDIFADDR_IN6
, (caddr_t
) &addreq
);
576 if_prefix_add_ipv6 (struct interface
*ifp
, struct connected
*ifc
)
582 if_prefix_delete_ipv6 (struct interface
*ifp
, struct connected
*ifc
)
586 #endif /* HAVE_STRUCT_IN6_ALIASREQ */
588 #endif /* LINUX_IPV6 */
590 #endif /* HAVE_IPV6 */