1 #ifndef __LINUX_RTNETLINK_H
2 #define __LINUX_RTNETLINK_H
3
4 #include <linux/types.h>
5 #include <linux/netlink.h>
6 #include <linux/if_link.h>
7 #include <linux/if_addr.h>
8 #include <linux/neighbour.h>
9
10 /****
11 * Routing/neighbour discovery messages.
12 ****/
13
14 /* Types of messages */
15
16 enum {
17 RTM_BASE = 16,
18 #define RTM_BASE RTM_BASE
19
20 RTM_NEWLINK = 16,
21 #define RTM_NEWLINK RTM_NEWLINK
22 RTM_DELLINK,
23 #define RTM_DELLINK RTM_DELLINK
24 RTM_GETLINK,
25 #define RTM_GETLINK RTM_GETLINK
26 RTM_SETLINK,
27 #define RTM_SETLINK RTM_SETLINK
28
29 RTM_NEWADDR = 20,
30 #define RTM_NEWADDR RTM_NEWADDR
31 RTM_DELADDR,
32 #define RTM_DELADDR RTM_DELADDR
33 RTM_GETADDR,
34 #define RTM_GETADDR RTM_GETADDR
35
36 RTM_NEWROUTE = 24,
37 #define RTM_NEWROUTE RTM_NEWROUTE
38 RTM_DELROUTE,
39 #define RTM_DELROUTE RTM_DELROUTE
40 RTM_GETROUTE,
41 #define RTM_GETROUTE RTM_GETROUTE
42
43 RTM_NEWNEIGH = 28,
44 #define RTM_NEWNEIGH RTM_NEWNEIGH
45 RTM_DELNEIGH,
46 #define RTM_DELNEIGH RTM_DELNEIGH
47 RTM_GETNEIGH,
48 #define RTM_GETNEIGH RTM_GETNEIGH
49
50 RTM_NEWRULE = 32,
51 #define RTM_NEWRULE RTM_NEWRULE
52 RTM_DELRULE,
53 #define RTM_DELRULE RTM_DELRULE
54 RTM_GETRULE,
55 #define RTM_GETRULE RTM_GETRULE
56
57 RTM_NEWQDISC = 36,
58 #define RTM_NEWQDISC RTM_NEWQDISC
59 RTM_DELQDISC,
60 #define RTM_DELQDISC RTM_DELQDISC
61 RTM_GETQDISC,
62 #define RTM_GETQDISC RTM_GETQDISC
63
64 RTM_NEWTCLASS = 40,
65 #define RTM_NEWTCLASS RTM_NEWTCLASS
66 RTM_DELTCLASS,
67 #define RTM_DELTCLASS RTM_DELTCLASS
68 RTM_GETTCLASS,
69 #define RTM_GETTCLASS RTM_GETTCLASS
70
71 RTM_NEWTFILTER = 44,
72 #define RTM_NEWTFILTER RTM_NEWTFILTER
73 RTM_DELTFILTER,
74 #define RTM_DELTFILTER RTM_DELTFILTER
75 RTM_GETTFILTER,
76 #define RTM_GETTFILTER RTM_GETTFILTER
77
78 RTM_NEWACTION = 48,
79 #define RTM_NEWACTION RTM_NEWACTION
80 RTM_DELACTION,
81 #define RTM_DELACTION RTM_DELACTION
82 RTM_GETACTION,
83 #define RTM_GETACTION RTM_GETACTION
84
85 RTM_NEWPREFIX = 52,
86 #define RTM_NEWPREFIX RTM_NEWPREFIX
87
88 RTM_GETMULTICAST = 58,
89 #define RTM_GETMULTICAST RTM_GETMULTICAST
90
91 RTM_GETANYCAST = 62,
92 #define RTM_GETANYCAST RTM_GETANYCAST
93
94 RTM_NEWNEIGHTBL = 64,
95 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
96 RTM_GETNEIGHTBL = 66,
97 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
98 RTM_SETNEIGHTBL,
99 #define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
100
101 RTM_NEWNDUSEROPT = 68,
102 #define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
103
104 RTM_NEWADDRLABEL = 72,
105 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
106 RTM_DELADDRLABEL,
107 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
108 RTM_GETADDRLABEL,
109 #define RTM_GETADDRLABEL RTM_GETADDRLABEL
110
111 RTM_GETDCB = 78,
112 #define RTM_GETDCB RTM_GETDCB
113 RTM_SETDCB,
114 #define RTM_SETDCB RTM_SETDCB
115
116 __RTM_MAX,
117 #define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1)
118 };
119
120 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
121 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
122 #define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2)
123
124 /*
125 Generic structure for encapsulation of optional route information.
126 It is reminiscent of sockaddr, but with sa_family replaced
127 with attribute type.
128 */
129
130 struct rtattr
131 {
132 unsigned short rta_len;
133 unsigned short rta_type;
134 };
135
136 /* Macros to handle rtattributes */
137
138 #define RTA_ALIGNTO 4
139 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
140 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
141 (rta)->rta_len >= sizeof(struct rtattr) && \
142 (rta)->rta_len <= (len))
143 #define RTA_NEXT(rta,attrlen) ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
144 (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
145 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
146 #define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len))
147 #define RTA_DATA(rta) ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
148 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
149
150
151
152
153 /******************************************************************************
154 * Definitions used in routing table administration.
155 ****/
156
157 struct rtmsg
158 {
159 unsigned char rtm_family;
160 unsigned char rtm_dst_len;
161 unsigned char rtm_src_len;
162 unsigned char rtm_tos;
163
164 unsigned char rtm_table; /* Routing table id */
165 unsigned char rtm_protocol; /* Routing protocol; see below */
166 unsigned char rtm_scope; /* See below */
167 unsigned char rtm_type; /* See below */
168
169 unsigned rtm_flags;
170 };
171
172 /* rtm_type */
173
174 enum
175 {
176 RTN_UNSPEC,
177 RTN_UNICAST, /* Gateway or direct route */
178 RTN_LOCAL, /* Accept locally */
179 RTN_BROADCAST, /* Accept locally as broadcast,
180 send as broadcast */
181 RTN_ANYCAST, /* Accept locally as broadcast,
182 but send as unicast */
183 RTN_MULTICAST, /* Multicast route */
184 RTN_BLACKHOLE, /* Drop */
185 RTN_UNREACHABLE, /* Destination is unreachable */
186 RTN_PROHIBIT, /* Administratively prohibited */
187 RTN_THROW, /* Not in this table */
188 RTN_NAT, /* Translate this address */
189 RTN_XRESOLVE, /* Use external resolver */
190 __RTN_MAX
191 };
192
193 #define RTN_MAX (__RTN_MAX - 1)
194
195
196 /* rtm_protocol */
197
198 #define RTPROT_UNSPEC 0
199 #define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects;
200 not used by current IPv4 */
201 #define RTPROT_KERNEL 2 /* Route installed by kernel */
202 #define RTPROT_BOOT 3 /* Route installed during boot */
203 #define RTPROT_STATIC 4 /* Route installed by administrator */
204
205 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
206 they are just passed from user and back as is.
207 It will be used by hypothetical multiple routing daemons.
208 Note that protocol values should be standardized in order to
209 avoid conflicts.
210 */
211
212 #define RTPROT_GATED 8 /* Apparently, GateD */
213 #define RTPROT_RA 9 /* RDISC/ND router advertisements */
214 #define RTPROT_MRT 10 /* Merit MRT */
215 #define RTPROT_ZEBRA 11 /* Zebra */
216 #define RTPROT_BIRD 12 /* BIRD */
217 #define RTPROT_DNROUTED 13 /* DECnet routing daemon */
218 #define RTPROT_XORP 14 /* XORP */
219 #define RTPROT_NTK 15 /* Netsukuku */
220
221 /* rtm_scope
222
223 Really it is not scope, but sort of distance to the destination.
224 NOWHERE are reserved for not existing destinations, HOST is our
225 local addresses, LINK are destinations, located on directly attached
226 link and UNIVERSE is everywhere in the Universe.
227
228 Intermediate values are also possible f.e. interior routes
229 could be assigned a value between UNIVERSE and LINK.
230 */
231
232 enum rt_scope_t
233 {
234 RT_SCOPE_UNIVERSE=0,
235 /* User defined values */
236 RT_SCOPE_SITE=200,
237 RT_SCOPE_LINK=253,
238 RT_SCOPE_HOST=254,
239 RT_SCOPE_NOWHERE=255
240 };
241
242 /* rtm_flags */
243
244 #define RTM_F_NOTIFY 0x100 /* Notify user of route change */
245 #define RTM_F_CLONED 0x200 /* This route is cloned */
246 #define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */
247 #define RTM_F_PREFIX 0x800 /* Prefix addresses */
248
249 /* Reserved table identifiers */
250
251 enum rt_class_t
252 {
253 RT_TABLE_UNSPEC=0,
254 /* User defined values */
255 RT_TABLE_COMPAT=252,
256 RT_TABLE_DEFAULT=253,
257 RT_TABLE_MAIN=254,
258 RT_TABLE_LOCAL=255,
259 RT_TABLE_MAX=0xFFFFFFFF
260 };
261
262
263 /* Routing message attributes */
264
265 enum rtattr_type_t
266 {
267 RTA_UNSPEC,
268 RTA_DST,
269 RTA_SRC,
270 RTA_IIF,
271 RTA_OIF,
272 RTA_GATEWAY,
273 RTA_PRIORITY,
274 RTA_PREFSRC,
275 RTA_METRICS,
276 RTA_MULTIPATH,
277 RTA_PROTOINFO, /* no longer used */
278 RTA_FLOW,
279 RTA_CACHEINFO,
280 RTA_SESSION, /* no longer used */
281 RTA_MP_ALGO, /* no longer used */
282 RTA_TABLE,
283 __RTA_MAX
284 };
285
286 #define RTA_MAX (__RTA_MAX - 1)
287
288 #define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
289 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
290
291 /* RTM_MULTIPATH --- array of struct rtnexthop.
292 *
293 * "struct rtnexthop" describes all necessary nexthop information,
294 * i.e. parameters of path to a destination via this nexthop.
295 *
296 * At the moment it is impossible to set different prefsrc, mtu, window
297 * and rtt for different paths from multipath.
298 */
299
300 struct rtnexthop
301 {
302 unsigned short rtnh_len;
303 unsigned char rtnh_flags;
304 unsigned char rtnh_hops;
305 int rtnh_ifindex;
306 };
307
308 /* rtnh_flags */
309
310 #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */
311 #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */
312 #define RTNH_F_ONLINK 4 /* Gateway is forced on link */
313
314 /* Macros to handle hexthops */
315
316 #define RTNH_ALIGNTO 4
317 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
318 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
319 ((int)(rtnh)->rtnh_len) <= (len))
320 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
321 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
322 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
323 #define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
324
325 /* RTM_CACHEINFO */
326
327 struct rta_cacheinfo
328 {
329 __u32 rta_clntref;
330 __u32 rta_lastuse;
331 __s32 rta_expires;
332 __u32 rta_error;
333 __u32 rta_used;
334
335 #define RTNETLINK_HAVE_PEERINFO 1
336 __u32 rta_id;
337 __u32 rta_ts;
338 __u32 rta_tsage;
339 };
340
341 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
342
343 enum
344 {
345 RTAX_UNSPEC,
346 #define RTAX_UNSPEC RTAX_UNSPEC
347 RTAX_LOCK,
348 #define RTAX_LOCK RTAX_LOCK
349 RTAX_MTU,
350 #define RTAX_MTU RTAX_MTU
351 RTAX_WINDOW,
352 #define RTAX_WINDOW RTAX_WINDOW
353 RTAX_RTT,
354 #define RTAX_RTT RTAX_RTT
355 RTAX_RTTVAR,
356 #define RTAX_RTTVAR RTAX_RTTVAR
357 RTAX_SSTHRESH,
358 #define RTAX_SSTHRESH RTAX_SSTHRESH
359 RTAX_CWND,
360 #define RTAX_CWND RTAX_CWND
361 RTAX_ADVMSS,
362 #define RTAX_ADVMSS RTAX_ADVMSS
363 RTAX_REORDERING,
364 #define RTAX_REORDERING RTAX_REORDERING
365 RTAX_HOPLIMIT,
366 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
367 RTAX_INITCWND,
368 #define RTAX_INITCWND RTAX_INITCWND
369 RTAX_FEATURES,
370 #define RTAX_FEATURES RTAX_FEATURES
371 RTAX_RTO_MIN,
372 #define RTAX_RTO_MIN RTAX_RTO_MIN
373 __RTAX_MAX
374 };
375
376 #define RTAX_MAX (__RTAX_MAX - 1)
377
378 #define RTAX_FEATURE_ECN 0x00000001
379 #define RTAX_FEATURE_SACK 0x00000002
380 #define RTAX_FEATURE_TIMESTAMP 0x00000004
381 #define RTAX_FEATURE_ALLFRAG 0x00000008
382
383 struct rta_session
384 {
385 __u8 proto;
386 __u8 pad1;
387 __u16 pad2;
388
389 union {
390 struct {
391 __u16 sport;
392 __u16 dport;
393 } ports;
394
395 struct {
396 __u8 type;
397 __u8 code;
398 __u16 ident;
399 } icmpt;
400
401 __u32 spi;
402 } u;
403 };
404
405 /****
406 * General form of address family dependent message.
407 ****/
408
409 struct rtgenmsg
410 {
411 unsigned char rtgen_family;
412 };
413
414 /*****************************************************************
415 * Link layer specific messages.
416 ****/
417
418 /* struct ifinfomsg
419 * passes link level specific information, not dependent
420 * on network protocol.
421 */
422
423 struct ifinfomsg
424 {
425 unsigned char ifi_family;
426 unsigned char __ifi_pad;
427 unsigned short ifi_type; /* ARPHRD_* */
428 int ifi_index; /* Link index */
429 unsigned ifi_flags; /* IFF_* flags */
430 unsigned ifi_change; /* IFF_* change mask */
431 };
432
433 /********************************************************************
434 * prefix information
435 ****/
436
437 struct prefixmsg
438 {
439 unsigned char prefix_family;
440 unsigned char prefix_pad1;
441 unsigned short prefix_pad2;
442 int prefix_ifindex;
443 unsigned char prefix_type;
444 unsigned char prefix_len;
445 unsigned char prefix_flags;
446 unsigned char prefix_pad3;
447 };
448
449 enum
450 {
451 PREFIX_UNSPEC,
452 PREFIX_ADDRESS,
453 PREFIX_CACHEINFO,
454 __PREFIX_MAX
455 };
456
457 #define PREFIX_MAX (__PREFIX_MAX - 1)
458
459 struct prefix_cacheinfo
460 {
461 __u32 preferred_time;
462 __u32 valid_time;
463 };
464
465
466 /*****************************************************************
467 * Traffic control messages.
468 ****/
469
470 struct tcmsg
471 {
472 unsigned char tcm_family;
473 unsigned char tcm__pad1;
474 unsigned short tcm__pad2;
475 int tcm_ifindex;
476 __u32 tcm_handle;
477 __u32 tcm_parent;
478 __u32 tcm_info;
479 };
480
481 enum
482 {
483 TCA_UNSPEC,
484 TCA_KIND,
485 TCA_OPTIONS,
486 TCA_STATS,
487 TCA_XSTATS,
488 TCA_RATE,
489 TCA_FCNT,
490 TCA_STATS2,
491 TCA_STAB,
492 __TCA_MAX
493 };
494
495 #define TCA_MAX (__TCA_MAX - 1)
496
497 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
498 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
499
500 /********************************************************************
501 * Neighbor Discovery userland options
502 ****/
503
504 struct nduseroptmsg
505 {
506 unsigned char nduseropt_family;
507 unsigned char nduseropt_pad1;
508 unsigned short nduseropt_opts_len; /* Total length of options */
509 int nduseropt_ifindex;
510 __u8 nduseropt_icmp_type;
511 __u8 nduseropt_icmp_code;
512 unsigned short nduseropt_pad2;
513 unsigned int nduseropt_pad3;
514 /* Followed by one or more ND options */
515 };
516
517 enum
518 {
519 NDUSEROPT_UNSPEC,
520 NDUSEROPT_SRCADDR,
521 __NDUSEROPT_MAX
522 };
523
524 #define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1)
525
526 #ifndef __KERNEL__
527 /* RTnetlink multicast groups - backwards compatibility for userspace */
528 #define RTMGRP_LINK 1
529 #define RTMGRP_NOTIFY 2
530 #define RTMGRP_NEIGH 4
531 #define RTMGRP_TC 8
532
533 #define RTMGRP_IPV4_IFADDR 0x10
534 #define RTMGRP_IPV4_MROUTE 0x20
535 #define RTMGRP_IPV4_ROUTE 0x40
536 #define RTMGRP_IPV4_RULE 0x80
537
538 #define RTMGRP_IPV6_IFADDR 0x100
539 #define RTMGRP_IPV6_MROUTE 0x200
540 #define RTMGRP_IPV6_ROUTE 0x400
541 #define RTMGRP_IPV6_IFINFO 0x800
542
543 #define RTMGRP_DECnet_IFADDR 0x1000
544 #define RTMGRP_DECnet_ROUTE 0x4000
545
546 #define RTMGRP_IPV6_PREFIX 0x20000
547 #endif
548
549 /* RTnetlink multicast groups */
550 enum rtnetlink_groups {
551 RTNLGRP_NONE,
552 #define RTNLGRP_NONE RTNLGRP_NONE
553 RTNLGRP_LINK,
554 #define RTNLGRP_LINK RTNLGRP_LINK
555 RTNLGRP_NOTIFY,
556 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY
557 RTNLGRP_NEIGH,
558 #define RTNLGRP_NEIGH RTNLGRP_NEIGH
559 RTNLGRP_TC,
560 #define RTNLGRP_TC RTNLGRP_TC
561 RTNLGRP_IPV4_IFADDR,
562 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR
563 RTNLGRP_IPV4_MROUTE,
564 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE
565 RTNLGRP_IPV4_ROUTE,
566 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE
567 RTNLGRP_IPV4_RULE,
568 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE
569 RTNLGRP_IPV6_IFADDR,
570 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR
571 RTNLGRP_IPV6_MROUTE,
572 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE
573 RTNLGRP_IPV6_ROUTE,
574 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE
575 RTNLGRP_IPV6_IFINFO,
576 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO
577 RTNLGRP_DECnet_IFADDR,
578 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR
579 RTNLGRP_NOP2,
580 RTNLGRP_DECnet_ROUTE,
581 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE
582 RTNLGRP_DECnet_RULE,
583 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE
584 RTNLGRP_NOP4,
585 RTNLGRP_IPV6_PREFIX,
586 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX
587 RTNLGRP_IPV6_RULE,
588 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE
589 RTNLGRP_ND_USEROPT,
590 #define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT
591 RTNLGRP_PHONET_IFADDR,
592 #define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR
593 RTNLGRP_PHONET_ROUTE,
594 #define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE
595 __RTNLGRP_MAX
596 };
597 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1)
598
599 /* TC action piece */
600 struct tcamsg
601 {
602 unsigned char tca_family;
603 unsigned char tca__pad1;
604 unsigned short tca__pad2;
605 };
606 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
607 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
608 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
609 #define TCAA_MAX 1
610
611 /* End of information exported to user level */
612
613 #ifdef __KERNEL__
614
615 #include <linux/mutex.h>
616
rtattr_strcmp(const struct rtattr * rta,const char * str)617 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
618 {
619 int len = strlen(str) + 1;
620 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
621 }
622
623 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
624 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
625 extern int rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
626 struct nlmsghdr *nlh, gfp_t flags);
627 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
628 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
629 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
630 u32 id, u32 ts, u32 tsage, long expires,
631 u32 error);
632
633 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
634
635 #define RTA_PUT(skb, attrtype, attrlen, data) \
636 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
637 goto rtattr_failure; \
638 __rta_fill(skb, attrtype, attrlen, data); })
639
640 #define RTA_APPEND(skb, attrlen, data) \
641 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
642 goto rtattr_failure; \
643 memcpy(skb_put(skb, attrlen), data, attrlen); })
644
645 #define RTA_PUT_NOHDR(skb, attrlen, data) \
646 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
647 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
648 RTA_ALIGN(attrlen) - attrlen); })
649
650 #define RTA_PUT_U8(skb, attrtype, value) \
651 ({ u8 _tmp = (value); \
652 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
653
654 #define RTA_PUT_U16(skb, attrtype, value) \
655 ({ u16 _tmp = (value); \
656 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
657
658 #define RTA_PUT_U32(skb, attrtype, value) \
659 ({ u32 _tmp = (value); \
660 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
661
662 #define RTA_PUT_U64(skb, attrtype, value) \
663 ({ u64 _tmp = (value); \
664 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
665
666 #define RTA_PUT_SECS(skb, attrtype, value) \
667 RTA_PUT_U64(skb, attrtype, (value) / HZ)
668
669 #define RTA_PUT_MSECS(skb, attrtype, value) \
670 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
671
672 #define RTA_PUT_STRING(skb, attrtype, value) \
673 RTA_PUT(skb, attrtype, strlen(value) + 1, value)
674
675 #define RTA_PUT_FLAG(skb, attrtype) \
676 RTA_PUT(skb, attrtype, 0, NULL);
677
678 #define RTA_NEST(skb, type) \
679 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
680 RTA_PUT(skb, type, 0, NULL); \
681 __start; })
682
683 #define RTA_NEST_END(skb, start) \
684 ({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
685 (skb)->len; })
686
687 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \
688 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
689 RTA_PUT(skb, type, attrlen, data); \
690 RTA_NEST(skb, type); \
691 __start; })
692
693 #define RTA_NEST_COMPAT_END(skb, start) \
694 ({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
695 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
696 RTA_NEST_END(skb, __nest); \
697 (skb)->len; })
698
699 #define RTA_NEST_CANCEL(skb, start) \
700 ({ if (start) \
701 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
702 -1; })
703
704 #define RTA_GET_U8(rta) \
705 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
706 goto rtattr_failure; \
707 *(u8 *) RTA_DATA(rta); })
708
709 #define RTA_GET_U16(rta) \
710 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
711 goto rtattr_failure; \
712 *(u16 *) RTA_DATA(rta); })
713
714 #define RTA_GET_U32(rta) \
715 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
716 goto rtattr_failure; \
717 *(u32 *) RTA_DATA(rta); })
718
719 #define RTA_GET_U64(rta) \
720 ({ u64 _tmp; \
721 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
722 goto rtattr_failure; \
723 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
724 _tmp; })
725
726 #define RTA_GET_FLAG(rta) (!!(rta))
727
728 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
729 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
730
731 static inline struct rtattr *
__rta_reserve(struct sk_buff * skb,int attrtype,int attrlen)732 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
733 {
734 struct rtattr *rta;
735 int size = RTA_LENGTH(attrlen);
736
737 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
738 rta->rta_type = attrtype;
739 rta->rta_len = size;
740 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
741 return rta;
742 }
743
744 #define __RTA_PUT(skb, attrtype, attrlen) \
745 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
746 goto rtattr_failure; \
747 __rta_reserve(skb, attrtype, attrlen); })
748
749 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
750
751 /* RTNL is used as a global lock for all changes to network configuration */
752 extern void rtnl_lock(void);
753 extern void rtnl_unlock(void);
754 extern int rtnl_trylock(void);
755 extern int rtnl_is_locked(void);
756
757 extern void rtnetlink_init(void);
758 extern void __rtnl_unlock(void);
759
760 #define ASSERT_RTNL() do { \
761 if (unlikely(!rtnl_is_locked())) { \
762 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
763 __FILE__, __LINE__); \
764 dump_stack(); \
765 } \
766 } while(0)
767
rtm_get_table(struct rtattr ** rta,u8 table)768 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
769 {
770 return RTA_GET_U32(rta[RTA_TABLE-1]);
771 rtattr_failure:
772 return table;
773 }
774
775 #endif /* __KERNEL__ */
776
777
778 #endif /* __LINUX_RTNETLINK_H */
779