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 /* rtnetlink families. Values up to 127 are reserved for real address
11 * families, values above 128 may be used arbitrarily.
12 */
13 #define RTNL_FAMILY_IPMR 128
14 #define RTNL_FAMILY_IP6MR 129
15 #define RTNL_FAMILY_MAX 129
16
17 /****
18 * Routing/neighbour discovery messages.
19 ****/
20
21 /* Types of messages */
22
23 enum {
24 RTM_BASE = 16,
25 #define RTM_BASE RTM_BASE
26
27 RTM_NEWLINK = 16,
28 #define RTM_NEWLINK RTM_NEWLINK
29 RTM_DELLINK,
30 #define RTM_DELLINK RTM_DELLINK
31 RTM_GETLINK,
32 #define RTM_GETLINK RTM_GETLINK
33 RTM_SETLINK,
34 #define RTM_SETLINK RTM_SETLINK
35
36 RTM_NEWADDR = 20,
37 #define RTM_NEWADDR RTM_NEWADDR
38 RTM_DELADDR,
39 #define RTM_DELADDR RTM_DELADDR
40 RTM_GETADDR,
41 #define RTM_GETADDR RTM_GETADDR
42
43 RTM_NEWROUTE = 24,
44 #define RTM_NEWROUTE RTM_NEWROUTE
45 RTM_DELROUTE,
46 #define RTM_DELROUTE RTM_DELROUTE
47 RTM_GETROUTE,
48 #define RTM_GETROUTE RTM_GETROUTE
49
50 RTM_NEWNEIGH = 28,
51 #define RTM_NEWNEIGH RTM_NEWNEIGH
52 RTM_DELNEIGH,
53 #define RTM_DELNEIGH RTM_DELNEIGH
54 RTM_GETNEIGH,
55 #define RTM_GETNEIGH RTM_GETNEIGH
56
57 RTM_NEWRULE = 32,
58 #define RTM_NEWRULE RTM_NEWRULE
59 RTM_DELRULE,
60 #define RTM_DELRULE RTM_DELRULE
61 RTM_GETRULE,
62 #define RTM_GETRULE RTM_GETRULE
63
64 RTM_NEWQDISC = 36,
65 #define RTM_NEWQDISC RTM_NEWQDISC
66 RTM_DELQDISC,
67 #define RTM_DELQDISC RTM_DELQDISC
68 RTM_GETQDISC,
69 #define RTM_GETQDISC RTM_GETQDISC
70
71 RTM_NEWTCLASS = 40,
72 #define RTM_NEWTCLASS RTM_NEWTCLASS
73 RTM_DELTCLASS,
74 #define RTM_DELTCLASS RTM_DELTCLASS
75 RTM_GETTCLASS,
76 #define RTM_GETTCLASS RTM_GETTCLASS
77
78 RTM_NEWTFILTER = 44,
79 #define RTM_NEWTFILTER RTM_NEWTFILTER
80 RTM_DELTFILTER,
81 #define RTM_DELTFILTER RTM_DELTFILTER
82 RTM_GETTFILTER,
83 #define RTM_GETTFILTER RTM_GETTFILTER
84
85 RTM_NEWACTION = 48,
86 #define RTM_NEWACTION RTM_NEWACTION
87 RTM_DELACTION,
88 #define RTM_DELACTION RTM_DELACTION
89 RTM_GETACTION,
90 #define RTM_GETACTION RTM_GETACTION
91
92 RTM_NEWPREFIX = 52,
93 #define RTM_NEWPREFIX RTM_NEWPREFIX
94
95 RTM_GETMULTICAST = 58,
96 #define RTM_GETMULTICAST RTM_GETMULTICAST
97
98 RTM_GETANYCAST = 62,
99 #define RTM_GETANYCAST RTM_GETANYCAST
100
101 RTM_NEWNEIGHTBL = 64,
102 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
103 RTM_GETNEIGHTBL = 66,
104 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
105 RTM_SETNEIGHTBL,
106 #define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
107
108 RTM_NEWNDUSEROPT = 68,
109 #define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
110
111 RTM_NEWADDRLABEL = 72,
112 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
113 RTM_DELADDRLABEL,
114 #define RTM_DELADDRLABEL RTM_DELADDRLABEL
115 RTM_GETADDRLABEL,
116 #define RTM_GETADDRLABEL RTM_GETADDRLABEL
117
118 RTM_GETDCB = 78,
119 #define RTM_GETDCB RTM_GETDCB
120 RTM_SETDCB,
121 #define RTM_SETDCB RTM_SETDCB
122
123 __RTM_MAX,
124 #define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1)
125 };
126
127 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
128 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
129 #define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2)
130
131 /*
132 Generic structure for encapsulation of optional route information.
133 It is reminiscent of sockaddr, but with sa_family replaced
134 with attribute type.
135 */
136
137 struct rtattr {
138 unsigned short rta_len;
139 unsigned short rta_type;
140 };
141
142 /* Macros to handle rtattributes */
143
144 #define RTA_ALIGNTO 4
145 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
146 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
147 (rta)->rta_len >= sizeof(struct rtattr) && \
148 (rta)->rta_len <= (len))
149 #define RTA_NEXT(rta,attrlen) ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
150 (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
151 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
152 #define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len))
153 #define RTA_DATA(rta) ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
154 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
155
156
157
158
159 /******************************************************************************
160 * Definitions used in routing table administration.
161 ****/
162
163 struct rtmsg {
164 unsigned char rtm_family;
165 unsigned char rtm_dst_len;
166 unsigned char rtm_src_len;
167 unsigned char rtm_tos;
168
169 unsigned char rtm_table; /* Routing table id */
170 unsigned char rtm_protocol; /* Routing protocol; see below */
171 unsigned char rtm_scope; /* See below */
172 unsigned char rtm_type; /* See below */
173
174 unsigned rtm_flags;
175 };
176
177 /* rtm_type */
178
179 enum {
180 RTN_UNSPEC,
181 RTN_UNICAST, /* Gateway or direct route */
182 RTN_LOCAL, /* Accept locally */
183 RTN_BROADCAST, /* Accept locally as broadcast,
184 send as broadcast */
185 RTN_ANYCAST, /* Accept locally as broadcast,
186 but send as unicast */
187 RTN_MULTICAST, /* Multicast route */
188 RTN_BLACKHOLE, /* Drop */
189 RTN_UNREACHABLE, /* Destination is unreachable */
190 RTN_PROHIBIT, /* Administratively prohibited */
191 RTN_THROW, /* Not in this table */
192 RTN_NAT, /* Translate this address */
193 RTN_XRESOLVE, /* Use external resolver */
194 __RTN_MAX
195 };
196
197 #define RTN_MAX (__RTN_MAX - 1)
198
199
200 /* rtm_protocol */
201
202 #define RTPROT_UNSPEC 0
203 #define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects;
204 not used by current IPv4 */
205 #define RTPROT_KERNEL 2 /* Route installed by kernel */
206 #define RTPROT_BOOT 3 /* Route installed during boot */
207 #define RTPROT_STATIC 4 /* Route installed by administrator */
208
209 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
210 they are just passed from user and back as is.
211 It will be used by hypothetical multiple routing daemons.
212 Note that protocol values should be standardized in order to
213 avoid conflicts.
214 */
215
216 #define RTPROT_GATED 8 /* Apparently, GateD */
217 #define RTPROT_RA 9 /* RDISC/ND router advertisements */
218 #define RTPROT_MRT 10 /* Merit MRT */
219 #define RTPROT_ZEBRA 11 /* Zebra */
220 #define RTPROT_BIRD 12 /* BIRD */
221 #define RTPROT_DNROUTED 13 /* DECnet routing daemon */
222 #define RTPROT_XORP 14 /* XORP */
223 #define RTPROT_NTK 15 /* Netsukuku */
224 #define RTPROT_DHCP 16 /* DHCP client */
225
226 /* rtm_scope
227
228 Really it is not scope, but sort of distance to the destination.
229 NOWHERE are reserved for not existing destinations, HOST is our
230 local addresses, LINK are destinations, located on directly attached
231 link and UNIVERSE is everywhere in the Universe.
232
233 Intermediate values are also possible f.e. interior routes
234 could be assigned a value between UNIVERSE and LINK.
235 */
236
237 enum rt_scope_t {
238 RT_SCOPE_UNIVERSE=0,
239 /* User defined values */
240 RT_SCOPE_SITE=200,
241 RT_SCOPE_LINK=253,
242 RT_SCOPE_HOST=254,
243 RT_SCOPE_NOWHERE=255
244 };
245
246 /* rtm_flags */
247
248 #define RTM_F_NOTIFY 0x100 /* Notify user of route change */
249 #define RTM_F_CLONED 0x200 /* This route is cloned */
250 #define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */
251 #define RTM_F_PREFIX 0x800 /* Prefix addresses */
252
253 /* Reserved table identifiers */
254
255 enum rt_class_t {
256 RT_TABLE_UNSPEC=0,
257 /* User defined values */
258 RT_TABLE_COMPAT=252,
259 RT_TABLE_DEFAULT=253,
260 RT_TABLE_MAIN=254,
261 RT_TABLE_LOCAL=255,
262 RT_TABLE_MAX=0xFFFFFFFF
263 };
264
265
266 /* Routing message attributes */
267
268 enum rtattr_type_t {
269 RTA_UNSPEC,
270 RTA_DST,
271 RTA_SRC,
272 RTA_IIF,
273 RTA_OIF,
274 RTA_GATEWAY,
275 RTA_PRIORITY,
276 RTA_PREFSRC,
277 RTA_METRICS,
278 RTA_MULTIPATH,
279 RTA_PROTOINFO, /* no longer used */
280 RTA_FLOW,
281 RTA_CACHEINFO,
282 RTA_SESSION, /* no longer used */
283 RTA_MP_ALGO, /* no longer used */
284 RTA_TABLE,
285 RTA_MARK,
286 __RTA_MAX
287 };
288
289 #define RTA_MAX (__RTA_MAX - 1)
290
291 #define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
292 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
293
294 /* RTM_MULTIPATH --- array of struct rtnexthop.
295 *
296 * "struct rtnexthop" describes all necessary nexthop information,
297 * i.e. parameters of path to a destination via this nexthop.
298 *
299 * At the moment it is impossible to set different prefsrc, mtu, window
300 * and rtt for different paths from multipath.
301 */
302
303 struct rtnexthop {
304 unsigned short rtnh_len;
305 unsigned char rtnh_flags;
306 unsigned char rtnh_hops;
307 int rtnh_ifindex;
308 };
309
310 /* rtnh_flags */
311
312 #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */
313 #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */
314 #define RTNH_F_ONLINK 4 /* Gateway is forced on link */
315
316 /* Macros to handle hexthops */
317
318 #define RTNH_ALIGNTO 4
319 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
320 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
321 ((int)(rtnh)->rtnh_len) <= (len))
322 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
323 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
324 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
325 #define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
326
327 /* RTM_CACHEINFO */
328
329 struct rta_cacheinfo {
330 __u32 rta_clntref;
331 __u32 rta_lastuse;
332 __s32 rta_expires;
333 __u32 rta_error;
334 __u32 rta_used;
335
336 #define RTNETLINK_HAVE_PEERINFO 1
337 __u32 rta_id;
338 __u32 rta_ts;
339 __u32 rta_tsage;
340 };
341
342 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
343
344 enum {
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_INITRWND,
374 #define RTAX_INITRWND RTAX_INITRWND
375 __RTAX_MAX
376 };
377
378 #define RTAX_MAX (__RTAX_MAX - 1)
379
380 #define RTAX_FEATURE_ECN 0x00000001
381 #define RTAX_FEATURE_SACK 0x00000002
382 #define RTAX_FEATURE_TIMESTAMP 0x00000004
383 #define RTAX_FEATURE_ALLFRAG 0x00000008
384
385 struct rta_session {
386 __u8 proto;
387 __u8 pad1;
388 __u16 pad2;
389
390 union {
391 struct {
392 __u16 sport;
393 __u16 dport;
394 } ports;
395
396 struct {
397 __u8 type;
398 __u8 code;
399 __u16 ident;
400 } icmpt;
401
402 __u32 spi;
403 } u;
404 };
405
406 /****
407 * General form of address family dependent message.
408 ****/
409
410 struct rtgenmsg {
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 unsigned char ifi_family;
425 unsigned char __ifi_pad;
426 unsigned short ifi_type; /* ARPHRD_* */
427 int ifi_index; /* Link index */
428 unsigned ifi_flags; /* IFF_* flags */
429 unsigned ifi_change; /* IFF_* change mask */
430 };
431
432 /********************************************************************
433 * prefix information
434 ****/
435
436 struct prefixmsg {
437 unsigned char prefix_family;
438 unsigned char prefix_pad1;
439 unsigned short prefix_pad2;
440 int prefix_ifindex;
441 unsigned char prefix_type;
442 unsigned char prefix_len;
443 unsigned char prefix_flags;
444 unsigned char prefix_pad3;
445 };
446
447 enum
448 {
449 PREFIX_UNSPEC,
450 PREFIX_ADDRESS,
451 PREFIX_CACHEINFO,
452 __PREFIX_MAX
453 };
454
455 #define PREFIX_MAX (__PREFIX_MAX - 1)
456
457 struct prefix_cacheinfo {
458 __u32 preferred_time;
459 __u32 valid_time;
460 };
461
462
463 /*****************************************************************
464 * Traffic control messages.
465 ****/
466
467 struct tcmsg {
468 unsigned char tcm_family;
469 unsigned char tcm__pad1;
470 unsigned short tcm__pad2;
471 int tcm_ifindex;
472 __u32 tcm_handle;
473 __u32 tcm_parent;
474 __u32 tcm_info;
475 };
476
477 enum {
478 TCA_UNSPEC,
479 TCA_KIND,
480 TCA_OPTIONS,
481 TCA_STATS,
482 TCA_XSTATS,
483 TCA_RATE,
484 TCA_FCNT,
485 TCA_STATS2,
486 TCA_STAB,
487 __TCA_MAX
488 };
489
490 #define TCA_MAX (__TCA_MAX - 1)
491
492 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
493 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
494
495 /********************************************************************
496 * Neighbor Discovery userland options
497 ****/
498
499 struct nduseroptmsg {
500 unsigned char nduseropt_family;
501 unsigned char nduseropt_pad1;
502 unsigned short nduseropt_opts_len; /* Total length of options */
503 int nduseropt_ifindex;
504 __u8 nduseropt_icmp_type;
505 __u8 nduseropt_icmp_code;
506 unsigned short nduseropt_pad2;
507 unsigned int nduseropt_pad3;
508 /* Followed by one or more ND options */
509 };
510
511 enum {
512 NDUSEROPT_UNSPEC,
513 NDUSEROPT_SRCADDR,
514 __NDUSEROPT_MAX
515 };
516
517 #define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1)
518
519 #ifndef __KERNEL__
520 /* RTnetlink multicast groups - backwards compatibility for userspace */
521 #define RTMGRP_LINK 1
522 #define RTMGRP_NOTIFY 2
523 #define RTMGRP_NEIGH 4
524 #define RTMGRP_TC 8
525
526 #define RTMGRP_IPV4_IFADDR 0x10
527 #define RTMGRP_IPV4_MROUTE 0x20
528 #define RTMGRP_IPV4_ROUTE 0x40
529 #define RTMGRP_IPV4_RULE 0x80
530
531 #define RTMGRP_IPV6_IFADDR 0x100
532 #define RTMGRP_IPV6_MROUTE 0x200
533 #define RTMGRP_IPV6_ROUTE 0x400
534 #define RTMGRP_IPV6_IFINFO 0x800
535
536 #define RTMGRP_DECnet_IFADDR 0x1000
537 #define RTMGRP_DECnet_ROUTE 0x4000
538
539 #define RTMGRP_IPV6_PREFIX 0x20000
540 #endif
541
542 /* RTnetlink multicast groups */
543 enum rtnetlink_groups {
544 RTNLGRP_NONE,
545 #define RTNLGRP_NONE RTNLGRP_NONE
546 RTNLGRP_LINK,
547 #define RTNLGRP_LINK RTNLGRP_LINK
548 RTNLGRP_NOTIFY,
549 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY
550 RTNLGRP_NEIGH,
551 #define RTNLGRP_NEIGH RTNLGRP_NEIGH
552 RTNLGRP_TC,
553 #define RTNLGRP_TC RTNLGRP_TC
554 RTNLGRP_IPV4_IFADDR,
555 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR
556 RTNLGRP_IPV4_MROUTE,
557 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE
558 RTNLGRP_IPV4_ROUTE,
559 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE
560 RTNLGRP_IPV4_RULE,
561 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE
562 RTNLGRP_IPV6_IFADDR,
563 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR
564 RTNLGRP_IPV6_MROUTE,
565 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE
566 RTNLGRP_IPV6_ROUTE,
567 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE
568 RTNLGRP_IPV6_IFINFO,
569 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO
570 RTNLGRP_DECnet_IFADDR,
571 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR
572 RTNLGRP_NOP2,
573 RTNLGRP_DECnet_ROUTE,
574 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE
575 RTNLGRP_DECnet_RULE,
576 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE
577 RTNLGRP_NOP4,
578 RTNLGRP_IPV6_PREFIX,
579 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX
580 RTNLGRP_IPV6_RULE,
581 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE
582 RTNLGRP_ND_USEROPT,
583 #define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT
584 RTNLGRP_PHONET_IFADDR,
585 #define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR
586 RTNLGRP_PHONET_ROUTE,
587 #define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE
588 __RTNLGRP_MAX
589 };
590 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1)
591
592 /* TC action piece */
593 struct tcamsg {
594 unsigned char tca_family;
595 unsigned char tca__pad1;
596 unsigned short tca__pad2;
597 };
598 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
599 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
600 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
601 #define TCAA_MAX 1
602
603 /* End of information exported to user level */
604
605 #ifdef __KERNEL__
606
607 #include <linux/mutex.h>
608 #include <linux/netdevice.h>
609
rtattr_strcmp(const struct rtattr * rta,const char * str)610 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
611 {
612 int len = strlen(str) + 1;
613 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
614 }
615
616 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
617 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
618 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
619 u32 group, struct nlmsghdr *nlh, gfp_t flags);
620 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
621 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
622 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
623 u32 id, u32 ts, u32 tsage, long expires,
624 u32 error);
625
626 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
627
628 #define RTA_PUT(skb, attrtype, attrlen, data) \
629 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
630 goto rtattr_failure; \
631 __rta_fill(skb, attrtype, attrlen, data); })
632
633 #define RTA_APPEND(skb, attrlen, data) \
634 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
635 goto rtattr_failure; \
636 memcpy(skb_put(skb, attrlen), data, attrlen); })
637
638 #define RTA_PUT_NOHDR(skb, attrlen, data) \
639 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
640 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
641 RTA_ALIGN(attrlen) - attrlen); })
642
643 #define RTA_PUT_U8(skb, attrtype, value) \
644 ({ u8 _tmp = (value); \
645 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
646
647 #define RTA_PUT_U16(skb, attrtype, value) \
648 ({ u16 _tmp = (value); \
649 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
650
651 #define RTA_PUT_U32(skb, attrtype, value) \
652 ({ u32 _tmp = (value); \
653 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
654
655 #define RTA_PUT_U64(skb, attrtype, value) \
656 ({ u64 _tmp = (value); \
657 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
658
659 #define RTA_PUT_SECS(skb, attrtype, value) \
660 RTA_PUT_U64(skb, attrtype, (value) / HZ)
661
662 #define RTA_PUT_MSECS(skb, attrtype, value) \
663 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
664
665 #define RTA_PUT_STRING(skb, attrtype, value) \
666 RTA_PUT(skb, attrtype, strlen(value) + 1, value)
667
668 #define RTA_PUT_FLAG(skb, attrtype) \
669 RTA_PUT(skb, attrtype, 0, NULL);
670
671 #define RTA_NEST(skb, type) \
672 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
673 RTA_PUT(skb, type, 0, NULL); \
674 __start; })
675
676 #define RTA_NEST_END(skb, start) \
677 ({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
678 (skb)->len; })
679
680 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \
681 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
682 RTA_PUT(skb, type, attrlen, data); \
683 RTA_NEST(skb, type); \
684 __start; })
685
686 #define RTA_NEST_COMPAT_END(skb, start) \
687 ({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
688 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
689 RTA_NEST_END(skb, __nest); \
690 (skb)->len; })
691
692 #define RTA_NEST_CANCEL(skb, start) \
693 ({ if (start) \
694 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
695 -1; })
696
697 #define RTA_GET_U8(rta) \
698 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
699 goto rtattr_failure; \
700 *(u8 *) RTA_DATA(rta); })
701
702 #define RTA_GET_U16(rta) \
703 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
704 goto rtattr_failure; \
705 *(u16 *) RTA_DATA(rta); })
706
707 #define RTA_GET_U32(rta) \
708 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
709 goto rtattr_failure; \
710 *(u32 *) RTA_DATA(rta); })
711
712 #define RTA_GET_U64(rta) \
713 ({ u64 _tmp; \
714 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
715 goto rtattr_failure; \
716 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
717 _tmp; })
718
719 #define RTA_GET_FLAG(rta) (!!(rta))
720
721 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
722 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
723
724 static inline struct rtattr *
__rta_reserve(struct sk_buff * skb,int attrtype,int attrlen)725 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
726 {
727 struct rtattr *rta;
728 int size = RTA_LENGTH(attrlen);
729
730 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
731 rta->rta_type = attrtype;
732 rta->rta_len = size;
733 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
734 return rta;
735 }
736
737 #define __RTA_PUT(skb, attrtype, attrlen) \
738 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
739 goto rtattr_failure; \
740 __rta_reserve(skb, attrtype, attrlen); })
741
742 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
743
744 /* RTNL is used as a global lock for all changes to network configuration */
745 extern void rtnl_lock(void);
746 extern void rtnl_unlock(void);
747 extern int rtnl_trylock(void);
748 extern int rtnl_is_locked(void);
749 #ifdef CONFIG_PROVE_LOCKING
750 extern int lockdep_rtnl_is_held(void);
751 #endif /* #ifdef CONFIG_PROVE_LOCKING */
752
753 /**
754 * rcu_dereference_rtnl - rcu_dereference with debug checking
755 * @p: The pointer to read, prior to dereferencing
756 *
757 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
758 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
759 */
760 #define rcu_dereference_rtnl(p) \
761 rcu_dereference_check(p, rcu_read_lock_held() || \
762 lockdep_rtnl_is_held())
763
764 /**
765 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
766 * @p: The pointer to read, prior to dereferencing
767 *
768 * Return the value of the specified RCU-protected pointer, but omit
769 * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
770 * caller holds RTNL.
771 */
772 #define rtnl_dereference(p) \
773 rcu_dereference_protected(p, lockdep_rtnl_is_held())
774
dev_ingress_queue(struct net_device * dev)775 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
776 {
777 return rtnl_dereference(dev->ingress_queue);
778 }
779
780 extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
781
782 extern void rtnetlink_init(void);
783 extern void __rtnl_unlock(void);
784
785 #define ASSERT_RTNL() do { \
786 if (unlikely(!rtnl_is_locked())) { \
787 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
788 __FILE__, __LINE__); \
789 dump_stack(); \
790 } \
791 } while(0)
792
rtm_get_table(struct rtattr ** rta,u8 table)793 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
794 {
795 return RTA_GET_U32(rta[RTA_TABLE-1]);
796 rtattr_failure:
797 return table;
798 }
799
800 #endif /* __KERNEL__ */
801
802
803 #endif /* __LINUX_RTNETLINK_H */
804