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[RTNETLINK]: Add rtnetlink notification interface
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1 #ifndef __LINUX_RTNETLINK_H
2 #define __LINUX_RTNETLINK_H
3
4 #include <linux/netlink.h>
5 #include <linux/if.h>
6
7 /****
8 * Routing/neighbour discovery messages.
9 ****/
10
11 /* Types of messages */
12
13 enum {
14 RTM_BASE = 16,
15 #define RTM_BASE RTM_BASE
16
17 RTM_NEWLINK = 16,
18 #define RTM_NEWLINK RTM_NEWLINK
19 RTM_DELLINK,
20 #define RTM_DELLINK RTM_DELLINK
21 RTM_GETLINK,
22 #define RTM_GETLINK RTM_GETLINK
23 RTM_SETLINK,
24 #define RTM_SETLINK RTM_SETLINK
25
26 RTM_NEWADDR = 20,
27 #define RTM_NEWADDR RTM_NEWADDR
28 RTM_DELADDR,
29 #define RTM_DELADDR RTM_DELADDR
30 RTM_GETADDR,
31 #define RTM_GETADDR RTM_GETADDR
32
33 RTM_NEWROUTE = 24,
34 #define RTM_NEWROUTE RTM_NEWROUTE
35 RTM_DELROUTE,
36 #define RTM_DELROUTE RTM_DELROUTE
37 RTM_GETROUTE,
38 #define RTM_GETROUTE RTM_GETROUTE
39
40 RTM_NEWNEIGH = 28,
41 #define RTM_NEWNEIGH RTM_NEWNEIGH
42 RTM_DELNEIGH,
43 #define RTM_DELNEIGH RTM_DELNEIGH
44 RTM_GETNEIGH,
45 #define RTM_GETNEIGH RTM_GETNEIGH
46
47 RTM_NEWRULE = 32,
48 #define RTM_NEWRULE RTM_NEWRULE
49 RTM_DELRULE,
50 #define RTM_DELRULE RTM_DELRULE
51 RTM_GETRULE,
52 #define RTM_GETRULE RTM_GETRULE
53
54 RTM_NEWQDISC = 36,
55 #define RTM_NEWQDISC RTM_NEWQDISC
56 RTM_DELQDISC,
57 #define RTM_DELQDISC RTM_DELQDISC
58 RTM_GETQDISC,
59 #define RTM_GETQDISC RTM_GETQDISC
60
61 RTM_NEWTCLASS = 40,
62 #define RTM_NEWTCLASS RTM_NEWTCLASS
63 RTM_DELTCLASS,
64 #define RTM_DELTCLASS RTM_DELTCLASS
65 RTM_GETTCLASS,
66 #define RTM_GETTCLASS RTM_GETTCLASS
67
68 RTM_NEWTFILTER = 44,
69 #define RTM_NEWTFILTER RTM_NEWTFILTER
70 RTM_DELTFILTER,
71 #define RTM_DELTFILTER RTM_DELTFILTER
72 RTM_GETTFILTER,
73 #define RTM_GETTFILTER RTM_GETTFILTER
74
75 RTM_NEWACTION = 48,
76 #define RTM_NEWACTION RTM_NEWACTION
77 RTM_DELACTION,
78 #define RTM_DELACTION RTM_DELACTION
79 RTM_GETACTION,
80 #define RTM_GETACTION RTM_GETACTION
81
82 RTM_NEWPREFIX = 52,
83 #define RTM_NEWPREFIX RTM_NEWPREFIX
84 RTM_GETPREFIX = 54,
85 #define RTM_GETPREFIX RTM_GETPREFIX
86
87 RTM_GETMULTICAST = 58,
88 #define RTM_GETMULTICAST RTM_GETMULTICAST
89
90 RTM_GETANYCAST = 62,
91 #define RTM_GETANYCAST RTM_GETANYCAST
92
93 RTM_NEWNEIGHTBL = 64,
94 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
95 RTM_GETNEIGHTBL = 66,
96 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
97 RTM_SETNEIGHTBL,
98 #define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
99
100 __RTM_MAX,
101 #define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1)
102 };
103
104 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
105 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
106 #define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2)
107
108 /*
109 Generic structure for encapsulation of optional route information.
110 It is reminiscent of sockaddr, but with sa_family replaced
111 with attribute type.
112 */
113
114 struct rtattr
115 {
116 unsigned short rta_len;
117 unsigned short rta_type;
118 };
119
120 /* Macros to handle rtattributes */
121
122 #define RTA_ALIGNTO 4
123 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
124 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
125 (rta)->rta_len >= sizeof(struct rtattr) && \
126 (rta)->rta_len <= (len))
127 #define RTA_NEXT(rta,attrlen) ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
128 (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
129 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
130 #define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len))
131 #define RTA_DATA(rta) ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
132 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
133
134
135
136
137 /******************************************************************************
138 * Definitions used in routing table administration.
139 ****/
140
141 struct rtmsg
142 {
143 unsigned char rtm_family;
144 unsigned char rtm_dst_len;
145 unsigned char rtm_src_len;
146 unsigned char rtm_tos;
147
148 unsigned char rtm_table; /* Routing table id */
149 unsigned char rtm_protocol; /* Routing protocol; see below */
150 unsigned char rtm_scope; /* See below */
151 unsigned char rtm_type; /* See below */
152
153 unsigned rtm_flags;
154 };
155
156 /* rtm_type */
157
158 enum
159 {
160 RTN_UNSPEC,
161 RTN_UNICAST, /* Gateway or direct route */
162 RTN_LOCAL, /* Accept locally */
163 RTN_BROADCAST, /* Accept locally as broadcast,
164 send as broadcast */
165 RTN_ANYCAST, /* Accept locally as broadcast,
166 but send as unicast */
167 RTN_MULTICAST, /* Multicast route */
168 RTN_BLACKHOLE, /* Drop */
169 RTN_UNREACHABLE, /* Destination is unreachable */
170 RTN_PROHIBIT, /* Administratively prohibited */
171 RTN_THROW, /* Not in this table */
172 RTN_NAT, /* Translate this address */
173 RTN_XRESOLVE, /* Use external resolver */
174 __RTN_MAX
175 };
176
177 #define RTN_MAX (__RTN_MAX - 1)
178
179
180 /* rtm_protocol */
181
182 #define RTPROT_UNSPEC 0
183 #define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects;
184 not used by current IPv4 */
185 #define RTPROT_KERNEL 2 /* Route installed by kernel */
186 #define RTPROT_BOOT 3 /* Route installed during boot */
187 #define RTPROT_STATIC 4 /* Route installed by administrator */
188
189 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
190 they are just passed from user and back as is.
191 It will be used by hypothetical multiple routing daemons.
192 Note that protocol values should be standardized in order to
193 avoid conflicts.
194 */
195
196 #define RTPROT_GATED 8 /* Apparently, GateD */
197 #define RTPROT_RA 9 /* RDISC/ND router advertisements */
198 #define RTPROT_MRT 10 /* Merit MRT */
199 #define RTPROT_ZEBRA 11 /* Zebra */
200 #define RTPROT_BIRD 12 /* BIRD */
201 #define RTPROT_DNROUTED 13 /* DECnet routing daemon */
202 #define RTPROT_XORP 14 /* XORP */
203 #define RTPROT_NTK 15 /* Netsukuku */
204
205 /* rtm_scope
206
207 Really it is not scope, but sort of distance to the destination.
208 NOWHERE are reserved for not existing destinations, HOST is our
209 local addresses, LINK are destinations, located on directly attached
210 link and UNIVERSE is everywhere in the Universe.
211
212 Intermediate values are also possible f.e. interior routes
213 could be assigned a value between UNIVERSE and LINK.
214 */
215
216 enum rt_scope_t
217 {
218 RT_SCOPE_UNIVERSE=0,
219 /* User defined values */
220 RT_SCOPE_SITE=200,
221 RT_SCOPE_LINK=253,
222 RT_SCOPE_HOST=254,
223 RT_SCOPE_NOWHERE=255
224 };
225
226 /* rtm_flags */
227
228 #define RTM_F_NOTIFY 0x100 /* Notify user of route change */
229 #define RTM_F_CLONED 0x200 /* This route is cloned */
230 #define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */
231 #define RTM_F_PREFIX 0x800 /* Prefix addresses */
232
233 /* Reserved table identifiers */
234
235 enum rt_class_t
236 {
237 RT_TABLE_UNSPEC=0,
238 /* User defined values */
239 RT_TABLE_DEFAULT=253,
240 RT_TABLE_MAIN=254,
241 RT_TABLE_LOCAL=255,
242 RT_TABLE_MAX=0xFFFFFFFF
243 };
244
245
246 /* Routing message attributes */
247
248 enum rtattr_type_t
249 {
250 RTA_UNSPEC,
251 RTA_DST,
252 RTA_SRC,
253 RTA_IIF,
254 RTA_OIF,
255 RTA_GATEWAY,
256 RTA_PRIORITY,
257 RTA_PREFSRC,
258 RTA_METRICS,
259 RTA_MULTIPATH,
260 RTA_PROTOINFO,
261 RTA_FLOW,
262 RTA_CACHEINFO,
263 RTA_SESSION,
264 RTA_MP_ALGO,
265 RTA_TABLE,
266 __RTA_MAX
267 };
268
269 #define RTA_MAX (__RTA_MAX - 1)
270
271 #define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
272 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
273
274 /* RTM_MULTIPATH --- array of struct rtnexthop.
275 *
276 * "struct rtnexthop" describes all necessary nexthop information,
277 * i.e. parameters of path to a destination via this nexthop.
278 *
279 * At the moment it is impossible to set different prefsrc, mtu, window
280 * and rtt for different paths from multipath.
281 */
282
283 struct rtnexthop
284 {
285 unsigned short rtnh_len;
286 unsigned char rtnh_flags;
287 unsigned char rtnh_hops;
288 int rtnh_ifindex;
289 };
290
291 /* rtnh_flags */
292
293 #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */
294 #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */
295 #define RTNH_F_ONLINK 4 /* Gateway is forced on link */
296
297 /* Macros to handle hexthops */
298
299 #define RTNH_ALIGNTO 4
300 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
301 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
302 ((int)(rtnh)->rtnh_len) <= (len))
303 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
304 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
305 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
306 #define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
307
308 /* RTM_CACHEINFO */
309
310 struct rta_cacheinfo
311 {
312 __u32 rta_clntref;
313 __u32 rta_lastuse;
314 __s32 rta_expires;
315 __u32 rta_error;
316 __u32 rta_used;
317
318 #define RTNETLINK_HAVE_PEERINFO 1
319 __u32 rta_id;
320 __u32 rta_ts;
321 __u32 rta_tsage;
322 };
323
324 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
325
326 enum
327 {
328 RTAX_UNSPEC,
329 #define RTAX_UNSPEC RTAX_UNSPEC
330 RTAX_LOCK,
331 #define RTAX_LOCK RTAX_LOCK
332 RTAX_MTU,
333 #define RTAX_MTU RTAX_MTU
334 RTAX_WINDOW,
335 #define RTAX_WINDOW RTAX_WINDOW
336 RTAX_RTT,
337 #define RTAX_RTT RTAX_RTT
338 RTAX_RTTVAR,
339 #define RTAX_RTTVAR RTAX_RTTVAR
340 RTAX_SSTHRESH,
341 #define RTAX_SSTHRESH RTAX_SSTHRESH
342 RTAX_CWND,
343 #define RTAX_CWND RTAX_CWND
344 RTAX_ADVMSS,
345 #define RTAX_ADVMSS RTAX_ADVMSS
346 RTAX_REORDERING,
347 #define RTAX_REORDERING RTAX_REORDERING
348 RTAX_HOPLIMIT,
349 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
350 RTAX_INITCWND,
351 #define RTAX_INITCWND RTAX_INITCWND
352 RTAX_FEATURES,
353 #define RTAX_FEATURES RTAX_FEATURES
354 __RTAX_MAX
355 };
356
357 #define RTAX_MAX (__RTAX_MAX - 1)
358
359 #define RTAX_FEATURE_ECN 0x00000001
360 #define RTAX_FEATURE_SACK 0x00000002
361 #define RTAX_FEATURE_TIMESTAMP 0x00000004
362 #define RTAX_FEATURE_ALLFRAG 0x00000008
363
364 struct rta_session
365 {
366 __u8 proto;
367 __u8 pad1;
368 __u16 pad2;
369
370 union {
371 struct {
372 __u16 sport;
373 __u16 dport;
374 } ports;
375
376 struct {
377 __u8 type;
378 __u8 code;
379 __u16 ident;
380 } icmpt;
381
382 __u32 spi;
383 } u;
384 };
385
386 /****
387 * General form of address family dependent message.
388 ****/
389
390 struct rtgenmsg
391 {
392 unsigned char rtgen_family;
393 };
394
395 /*****************************************************************
396 * Link layer specific messages.
397 ****/
398
399 /* struct ifinfomsg
400 * passes link level specific information, not dependent
401 * on network protocol.
402 */
403
404 struct ifinfomsg
405 {
406 unsigned char ifi_family;
407 unsigned char __ifi_pad;
408 unsigned short ifi_type; /* ARPHRD_* */
409 int ifi_index; /* Link index */
410 unsigned ifi_flags; /* IFF_* flags */
411 unsigned ifi_change; /* IFF_* change mask */
412 };
413
414 /********************************************************************
415 * prefix information
416 ****/
417
418 struct prefixmsg
419 {
420 unsigned char prefix_family;
421 unsigned char prefix_pad1;
422 unsigned short prefix_pad2;
423 int prefix_ifindex;
424 unsigned char prefix_type;
425 unsigned char prefix_len;
426 unsigned char prefix_flags;
427 unsigned char prefix_pad3;
428 };
429
430 enum
431 {
432 PREFIX_UNSPEC,
433 PREFIX_ADDRESS,
434 PREFIX_CACHEINFO,
435 __PREFIX_MAX
436 };
437
438 #define PREFIX_MAX (__PREFIX_MAX - 1)
439
440 struct prefix_cacheinfo
441 {
442 __u32 preferred_time;
443 __u32 valid_time;
444 };
445
446
447 /*****************************************************************
448 * Traffic control messages.
449 ****/
450
451 struct tcmsg
452 {
453 unsigned char tcm_family;
454 unsigned char tcm__pad1;
455 unsigned short tcm__pad2;
456 int tcm_ifindex;
457 __u32 tcm_handle;
458 __u32 tcm_parent;
459 __u32 tcm_info;
460 };
461
462 enum
463 {
464 TCA_UNSPEC,
465 TCA_KIND,
466 TCA_OPTIONS,
467 TCA_STATS,
468 TCA_XSTATS,
469 TCA_RATE,
470 TCA_FCNT,
471 TCA_STATS2,
472 __TCA_MAX
473 };
474
475 #define TCA_MAX (__TCA_MAX - 1)
476
477 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
478 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
479
480 #ifndef __KERNEL__
481 /* RTnetlink multicast groups - backwards compatibility for userspace */
482 #define RTMGRP_LINK 1
483 #define RTMGRP_NOTIFY 2
484 #define RTMGRP_NEIGH 4
485 #define RTMGRP_TC 8
486
487 #define RTMGRP_IPV4_IFADDR 0x10
488 #define RTMGRP_IPV4_MROUTE 0x20
489 #define RTMGRP_IPV4_ROUTE 0x40
490 #define RTMGRP_IPV4_RULE 0x80
491
492 #define RTMGRP_IPV6_IFADDR 0x100
493 #define RTMGRP_IPV6_MROUTE 0x200
494 #define RTMGRP_IPV6_ROUTE 0x400
495 #define RTMGRP_IPV6_IFINFO 0x800
496
497 #define RTMGRP_DECnet_IFADDR 0x1000
498 #define RTMGRP_DECnet_ROUTE 0x4000
499
500 #define RTMGRP_IPV6_PREFIX 0x20000
501 #endif
502
503 /* RTnetlink multicast groups */
504 enum rtnetlink_groups {
505 RTNLGRP_NONE,
506 #define RTNLGRP_NONE RTNLGRP_NONE
507 RTNLGRP_LINK,
508 #define RTNLGRP_LINK RTNLGRP_LINK
509 RTNLGRP_NOTIFY,
510 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY
511 RTNLGRP_NEIGH,
512 #define RTNLGRP_NEIGH RTNLGRP_NEIGH
513 RTNLGRP_TC,
514 #define RTNLGRP_TC RTNLGRP_TC
515 RTNLGRP_IPV4_IFADDR,
516 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR
517 RTNLGRP_IPV4_MROUTE,
518 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE
519 RTNLGRP_IPV4_ROUTE,
520 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE
521 RTNLGRP_IPV4_RULE,
522 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE
523 RTNLGRP_IPV6_IFADDR,
524 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR
525 RTNLGRP_IPV6_MROUTE,
526 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE
527 RTNLGRP_IPV6_ROUTE,
528 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE
529 RTNLGRP_IPV6_IFINFO,
530 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO
531 RTNLGRP_DECnet_IFADDR,
532 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR
533 RTNLGRP_NOP2,
534 RTNLGRP_DECnet_ROUTE,
535 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE
536 RTNLGRP_DECnet_RULE,
537 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE
538 RTNLGRP_NOP4,
539 RTNLGRP_IPV6_PREFIX,
540 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX
541 RTNLGRP_IPV6_RULE,
542 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE
543 __RTNLGRP_MAX
544 };
545 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1)
546
547 /* TC action piece */
548 struct tcamsg
549 {
550 unsigned char tca_family;
551 unsigned char tca__pad1;
552 unsigned short tca__pad2;
553 };
554 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
555 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
556 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
557 #define TCAA_MAX 1
558
559 /* End of information exported to user level */
560
561 #ifdef __KERNEL__
562
563 #include <linux/mutex.h>
564
565 extern size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size);
566 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
567 {
568 int len = strlen(str) + 1;
569 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
570 }
571
572 extern int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len);
573
574 #define rtattr_parse_nested(tb, max, rta) \
575 rtattr_parse((tb), (max), RTA_DATA((rta)), RTA_PAYLOAD((rta)))
576
577 extern struct sock *rtnl;
578
579 struct rtnetlink_link
580 {
581 int (*doit)(struct sk_buff *, struct nlmsghdr*, void *attr);
582 int (*dumpit)(struct sk_buff *, struct netlink_callback *cb);
583 };
584
585 extern struct rtnetlink_link * rtnetlink_links[NPROTO];
586 extern int rtnetlink_send(struct sk_buff *skb, u32 pid, u32 group, int echo);
587 extern int rtnl_unicast(struct sk_buff *skb, u32 pid);
588 extern int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group,
589 struct nlmsghdr *nlh, gfp_t flags);
590 extern void rtnl_set_sk_err(u32 group, int error);
591 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
592
593 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
594
595 #define RTA_PUT(skb, attrtype, attrlen, data) \
596 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
597 goto rtattr_failure; \
598 __rta_fill(skb, attrtype, attrlen, data); })
599
600 #define RTA_APPEND(skb, attrlen, data) \
601 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
602 goto rtattr_failure; \
603 memcpy(skb_put(skb, attrlen), data, attrlen); })
604
605 #define RTA_PUT_NOHDR(skb, attrlen, data) \
606 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
607 memset(skb->tail - (RTA_ALIGN(attrlen) - attrlen), 0, \
608 RTA_ALIGN(attrlen) - attrlen); })
609
610 #define RTA_PUT_U8(skb, attrtype, value) \
611 ({ u8 _tmp = (value); \
612 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
613
614 #define RTA_PUT_U16(skb, attrtype, value) \
615 ({ u16 _tmp = (value); \
616 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
617
618 #define RTA_PUT_U32(skb, attrtype, value) \
619 ({ u32 _tmp = (value); \
620 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
621
622 #define RTA_PUT_U64(skb, attrtype, value) \
623 ({ u64 _tmp = (value); \
624 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
625
626 #define RTA_PUT_SECS(skb, attrtype, value) \
627 RTA_PUT_U64(skb, attrtype, (value) / HZ)
628
629 #define RTA_PUT_MSECS(skb, attrtype, value) \
630 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
631
632 #define RTA_PUT_STRING(skb, attrtype, value) \
633 RTA_PUT(skb, attrtype, strlen(value) + 1, value)
634
635 #define RTA_PUT_FLAG(skb, attrtype) \
636 RTA_PUT(skb, attrtype, 0, NULL);
637
638 #define RTA_NEST(skb, type) \
639 ({ struct rtattr *__start = (struct rtattr *) (skb)->tail; \
640 RTA_PUT(skb, type, 0, NULL); \
641 __start; })
642
643 #define RTA_NEST_END(skb, start) \
644 ({ (start)->rta_len = ((skb)->tail - (unsigned char *) (start)); \
645 (skb)->len; })
646
647 #define RTA_NEST_CANCEL(skb, start) \
648 ({ if (start) \
649 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
650 -1; })
651
652 #define RTA_GET_U8(rta) \
653 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
654 goto rtattr_failure; \
655 *(u8 *) RTA_DATA(rta); })
656
657 #define RTA_GET_U16(rta) \
658 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
659 goto rtattr_failure; \
660 *(u16 *) RTA_DATA(rta); })
661
662 #define RTA_GET_U32(rta) \
663 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
664 goto rtattr_failure; \
665 *(u32 *) RTA_DATA(rta); })
666
667 #define RTA_GET_U64(rta) \
668 ({ u64 _tmp; \
669 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
670 goto rtattr_failure; \
671 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
672 _tmp; })
673
674 #define RTA_GET_FLAG(rta) (!!(rta))
675
676 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
677 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
678
679 static inline struct rtattr *
680 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
681 {
682 struct rtattr *rta;
683 int size = RTA_LENGTH(attrlen);
684
685 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
686 rta->rta_type = attrtype;
687 rta->rta_len = size;
688 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
689 return rta;
690 }
691
692 #define __RTA_PUT(skb, attrtype, attrlen) \
693 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
694 goto rtattr_failure; \
695 __rta_reserve(skb, attrtype, attrlen); })
696
697 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
698
699 /* RTNL is used as a global lock for all changes to network configuration */
700 extern void rtnl_lock(void);
701 extern void rtnl_unlock(void);
702 extern int rtnl_trylock(void);
703
704 extern void rtnetlink_init(void);
705 extern void __rtnl_unlock(void);
706
707 #define ASSERT_RTNL() do { \
708 if (unlikely(rtnl_trylock())) { \
709 rtnl_unlock(); \
710 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
711 __FILE__, __LINE__); \
712 dump_stack(); \
713 } \
714 } while(0)
715
716 #define BUG_TRAP(x) do { \
717 if (unlikely(!(x))) { \
718 printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \
719 #x, __FILE__ , __LINE__); \
720 } \
721 } while(0)
722
723 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
724 {
725 return RTA_GET_U32(rta[RTA_TABLE-1]);
726 rtattr_failure:
727 return table;
728 }
729
730 #endif /* __KERNEL__ */
731
732
733 #endif /* __LINUX_RTNETLINK_H */