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_MFC_STATS, /* not used - backported from the future */
287 RTA_UID,
288 __RTA_MAX
289 };
290
291 #define RTA_MAX (__RTA_MAX - 1)
292
293 #define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
294 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
295
296 /* RTM_MULTIPATH --- array of struct rtnexthop.
297 *
298 * "struct rtnexthop" describes all necessary nexthop information,
299 * i.e. parameters of path to a destination via this nexthop.
300 *
301 * At the moment it is impossible to set different prefsrc, mtu, window
302 * and rtt for different paths from multipath.
303 */
304
305 struct rtnexthop {
306 unsigned short rtnh_len;
307 unsigned char rtnh_flags;
308 unsigned char rtnh_hops;
309 int rtnh_ifindex;
310 };
311
312 /* rtnh_flags */
313
314 #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */
315 #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */
316 #define RTNH_F_ONLINK 4 /* Gateway is forced on link */
317
318 /* Macros to handle hexthops */
319
320 #define RTNH_ALIGNTO 4
321 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
322 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
323 ((int)(rtnh)->rtnh_len) <= (len))
324 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
325 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
326 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
327 #define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
328
329 /* RTM_CACHEINFO */
330
331 struct rta_cacheinfo {
332 __u32 rta_clntref;
333 __u32 rta_lastuse;
334 __s32 rta_expires;
335 __u32 rta_error;
336 __u32 rta_used;
337
338 #define RTNETLINK_HAVE_PEERINFO 1
339 __u32 rta_id;
340 __u32 rta_ts;
341 __u32 rta_tsage;
342 };
343
344 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
345
346 enum {
347 RTAX_UNSPEC,
348 #define RTAX_UNSPEC RTAX_UNSPEC
349 RTAX_LOCK,
350 #define RTAX_LOCK RTAX_LOCK
351 RTAX_MTU,
352 #define RTAX_MTU RTAX_MTU
353 RTAX_WINDOW,
354 #define RTAX_WINDOW RTAX_WINDOW
355 RTAX_RTT,
356 #define RTAX_RTT RTAX_RTT
357 RTAX_RTTVAR,
358 #define RTAX_RTTVAR RTAX_RTTVAR
359 RTAX_SSTHRESH,
360 #define RTAX_SSTHRESH RTAX_SSTHRESH
361 RTAX_CWND,
362 #define RTAX_CWND RTAX_CWND
363 RTAX_ADVMSS,
364 #define RTAX_ADVMSS RTAX_ADVMSS
365 RTAX_REORDERING,
366 #define RTAX_REORDERING RTAX_REORDERING
367 RTAX_HOPLIMIT,
368 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
369 RTAX_INITCWND,
370 #define RTAX_INITCWND RTAX_INITCWND
371 RTAX_FEATURES,
372 #define RTAX_FEATURES RTAX_FEATURES
373 RTAX_RTO_MIN,
374 #define RTAX_RTO_MIN RTAX_RTO_MIN
375 RTAX_INITRWND,
376 #define RTAX_INITRWND RTAX_INITRWND
377 __RTAX_MAX
378 };
379
380 #define RTAX_MAX (__RTAX_MAX - 1)
381
382 #define RTAX_FEATURE_ECN 0x00000001
383 #define RTAX_FEATURE_SACK 0x00000002
384 #define RTAX_FEATURE_TIMESTAMP 0x00000004
385 #define RTAX_FEATURE_ALLFRAG 0x00000008
386
387 struct rta_session {
388 __u8 proto;
389 __u8 pad1;
390 __u16 pad2;
391
392 union {
393 struct {
394 __u16 sport;
395 __u16 dport;
396 } ports;
397
398 struct {
399 __u8 type;
400 __u8 code;
401 __u16 ident;
402 } icmpt;
403
404 __u32 spi;
405 } u;
406 };
407
408 /****
409 * General form of address family dependent message.
410 ****/
411
412 struct rtgenmsg {
413 unsigned char rtgen_family;
414 };
415
416 /*****************************************************************
417 * Link layer specific messages.
418 ****/
419
420 /* struct ifinfomsg
421 * passes link level specific information, not dependent
422 * on network protocol.
423 */
424
425 struct ifinfomsg {
426 unsigned char ifi_family;
427 unsigned char __ifi_pad;
428 unsigned short ifi_type; /* ARPHRD_* */
429 int ifi_index; /* Link index */
430 unsigned ifi_flags; /* IFF_* flags */
431 unsigned ifi_change; /* IFF_* change mask */
432 };
433
434 /********************************************************************
435 * prefix information
436 ****/
437
438 struct prefixmsg {
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 __u32 preferred_time;
461 __u32 valid_time;
462 };
463
464
465 /*****************************************************************
466 * Traffic control messages.
467 ****/
468
469 struct tcmsg {
470 unsigned char tcm_family;
471 unsigned char tcm__pad1;
472 unsigned short tcm__pad2;
473 int tcm_ifindex;
474 __u32 tcm_handle;
475 __u32 tcm_parent;
476 __u32 tcm_info;
477 };
478
479 enum {
480 TCA_UNSPEC,
481 TCA_KIND,
482 TCA_OPTIONS,
483 TCA_STATS,
484 TCA_XSTATS,
485 TCA_RATE,
486 TCA_FCNT,
487 TCA_STATS2,
488 TCA_STAB,
489 __TCA_MAX
490 };
491
492 #define TCA_MAX (__TCA_MAX - 1)
493
494 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
495 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
496
497 /********************************************************************
498 * Neighbor Discovery userland options
499 ****/
500
501 struct nduseroptmsg {
502 unsigned char nduseropt_family;
503 unsigned char nduseropt_pad1;
504 unsigned short nduseropt_opts_len; /* Total length of options */
505 int nduseropt_ifindex;
506 __u8 nduseropt_icmp_type;
507 __u8 nduseropt_icmp_code;
508 unsigned short nduseropt_pad2;
509 unsigned int nduseropt_pad3;
510 /* Followed by one or more ND options */
511 };
512
513 enum {
514 NDUSEROPT_UNSPEC,
515 NDUSEROPT_SRCADDR,
516 __NDUSEROPT_MAX
517 };
518
519 #define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1)
520
521 #ifndef __KERNEL__
522 /* RTnetlink multicast groups - backwards compatibility for userspace */
523 #define RTMGRP_LINK 1
524 #define RTMGRP_NOTIFY 2
525 #define RTMGRP_NEIGH 4
526 #define RTMGRP_TC 8
527
528 #define RTMGRP_IPV4_IFADDR 0x10
529 #define RTMGRP_IPV4_MROUTE 0x20
530 #define RTMGRP_IPV4_ROUTE 0x40
531 #define RTMGRP_IPV4_RULE 0x80
532
533 #define RTMGRP_IPV6_IFADDR 0x100
534 #define RTMGRP_IPV6_MROUTE 0x200
535 #define RTMGRP_IPV6_ROUTE 0x400
536 #define RTMGRP_IPV6_IFINFO 0x800
537
538 #define RTMGRP_DECnet_IFADDR 0x1000
539 #define RTMGRP_DECnet_ROUTE 0x4000
540
541 #define RTMGRP_IPV6_PREFIX 0x20000
542 #endif
543
544 /* RTnetlink multicast groups */
545 enum rtnetlink_groups {
546 RTNLGRP_NONE,
547 #define RTNLGRP_NONE RTNLGRP_NONE
548 RTNLGRP_LINK,
549 #define RTNLGRP_LINK RTNLGRP_LINK
550 RTNLGRP_NOTIFY,
551 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY
552 RTNLGRP_NEIGH,
553 #define RTNLGRP_NEIGH RTNLGRP_NEIGH
554 RTNLGRP_TC,
555 #define RTNLGRP_TC RTNLGRP_TC
556 RTNLGRP_IPV4_IFADDR,
557 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR
558 RTNLGRP_IPV4_MROUTE,
559 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE
560 RTNLGRP_IPV4_ROUTE,
561 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE
562 RTNLGRP_IPV4_RULE,
563 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE
564 RTNLGRP_IPV6_IFADDR,
565 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR
566 RTNLGRP_IPV6_MROUTE,
567 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE
568 RTNLGRP_IPV6_ROUTE,
569 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE
570 RTNLGRP_IPV6_IFINFO,
571 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO
572 RTNLGRP_DECnet_IFADDR,
573 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR
574 RTNLGRP_NOP2,
575 RTNLGRP_DECnet_ROUTE,
576 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE
577 RTNLGRP_DECnet_RULE,
578 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE
579 RTNLGRP_NOP4,
580 RTNLGRP_IPV6_PREFIX,
581 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX
582 RTNLGRP_IPV6_RULE,
583 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE
584 RTNLGRP_ND_USEROPT,
585 #define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT
586 RTNLGRP_PHONET_IFADDR,
587 #define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR
588 RTNLGRP_PHONET_ROUTE,
589 #define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE
590 RTNLGRP_DCB,
591 #define RTNLGRP_DCB RTNLGRP_DCB
592 __RTNLGRP_MAX
593 };
594 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1)
595
596 /* TC action piece */
597 struct tcamsg {
598 unsigned char tca_family;
599 unsigned char tca__pad1;
600 unsigned short tca__pad2;
601 };
602 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
603 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
604 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
605 #define TCAA_MAX 1
606
607 /* New extended info filters for IFLA_EXT_MASK */
608 #define RTEXT_FILTER_VF (1 << 0)
609
610 /* End of information exported to user level */
611
612 #ifdef __KERNEL__
613
614 #include <linux/mutex.h>
615 #include <linux/netdevice.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 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
626 u32 group, 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 #ifdef CONFIG_PROVE_LOCKING
757 extern int lockdep_rtnl_is_held(void);
758 #endif /* #ifdef CONFIG_PROVE_LOCKING */
759
760 /**
761 * rcu_dereference_rtnl - rcu_dereference with debug checking
762 * @p: The pointer to read, prior to dereferencing
763 *
764 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
765 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
766 */
767 #define rcu_dereference_rtnl(p) \
768 rcu_dereference_check(p, lockdep_rtnl_is_held())
769
770 /**
771 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
772 * @p: The pointer to read, prior to dereferencing
773 *
774 * Return the value of the specified RCU-protected pointer, but omit
775 * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
776 * caller holds RTNL.
777 */
778 #define rtnl_dereference(p) \
779 rcu_dereference_protected(p, lockdep_rtnl_is_held())
780
dev_ingress_queue(struct net_device * dev)781 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
782 {
783 return rtnl_dereference(dev->ingress_queue);
784 }
785
786 extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
787
788 extern void rtnetlink_init(void);
789 extern void __rtnl_unlock(void);
790
791 #define ASSERT_RTNL() do { \
792 if (unlikely(!rtnl_is_locked())) { \
793 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
794 __FILE__, __LINE__); \
795 dump_stack(); \
796 } \
797 } while(0)
798
rtm_get_table(struct rtattr ** rta,u8 table)799 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
800 {
801 return RTA_GET_U32(rta[RTA_TABLE-1]);
802 rtattr_failure:
803 return table;
804 }
805
806 #endif /* __KERNEL__ */
807
808
809 #endif /* __LINUX_RTNETLINK_H */
810