netfilter: nf_nat: fix inverted logic for persistent NAT mappings
[linux-2.6/mini2440.git] / include / linux / rtnetlink.h
blobba3254ecf7fbf12fa14edf4141aac0393b1cad3a
1 #ifndef __LINUX_RTNETLINK_H
2 #define __LINUX_RTNETLINK_H
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>
10 /****
11 * Routing/neighbour discovery messages.
12 ****/
14 /* Types of messages */
16 enum {
17 RTM_BASE = 16,
18 #define RTM_BASE RTM_BASE
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
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
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
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
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
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
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
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
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
85 RTM_NEWPREFIX = 52,
86 #define RTM_NEWPREFIX RTM_NEWPREFIX
88 RTM_GETMULTICAST = 58,
89 #define RTM_GETMULTICAST RTM_GETMULTICAST
91 RTM_GETANYCAST = 62,
92 #define RTM_GETANYCAST RTM_GETANYCAST
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
101 RTM_NEWNDUSEROPT = 68,
102 #define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
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
111 RTM_GETDCB = 78,
112 #define RTM_GETDCB RTM_GETDCB
113 RTM_SETDCB,
114 #define RTM_SETDCB RTM_SETDCB
116 __RTM_MAX,
117 #define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1)
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)
125 Generic structure for encapsulation of optional route information.
126 It is reminiscent of sockaddr, but with sa_family replaced
127 with attribute type.
130 struct rtattr
132 unsigned short rta_len;
133 unsigned short rta_type;
136 /* Macros to handle rtattributes */
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))
153 /******************************************************************************
154 * Definitions used in routing table administration.
155 ****/
157 struct rtmsg
159 unsigned char rtm_family;
160 unsigned char rtm_dst_len;
161 unsigned char rtm_src_len;
162 unsigned char rtm_tos;
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 */
169 unsigned rtm_flags;
172 /* rtm_type */
174 enum
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
193 #define RTN_MAX (__RTN_MAX - 1)
196 /* rtm_protocol */
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 */
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.
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 #define RTPROT_DHCP 16 /* DHCP client */
222 /* rtm_scope
224 Really it is not scope, but sort of distance to the destination.
225 NOWHERE are reserved for not existing destinations, HOST is our
226 local addresses, LINK are destinations, located on directly attached
227 link and UNIVERSE is everywhere in the Universe.
229 Intermediate values are also possible f.e. interior routes
230 could be assigned a value between UNIVERSE and LINK.
233 enum rt_scope_t
235 RT_SCOPE_UNIVERSE=0,
236 /* User defined values */
237 RT_SCOPE_SITE=200,
238 RT_SCOPE_LINK=253,
239 RT_SCOPE_HOST=254,
240 RT_SCOPE_NOWHERE=255
243 /* rtm_flags */
245 #define RTM_F_NOTIFY 0x100 /* Notify user of route change */
246 #define RTM_F_CLONED 0x200 /* This route is cloned */
247 #define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */
248 #define RTM_F_PREFIX 0x800 /* Prefix addresses */
250 /* Reserved table identifiers */
252 enum rt_class_t
254 RT_TABLE_UNSPEC=0,
255 /* User defined values */
256 RT_TABLE_COMPAT=252,
257 RT_TABLE_DEFAULT=253,
258 RT_TABLE_MAIN=254,
259 RT_TABLE_LOCAL=255,
260 RT_TABLE_MAX=0xFFFFFFFF
264 /* Routing message attributes */
266 enum rtattr_type_t
268 RTA_UNSPEC,
269 RTA_DST,
270 RTA_SRC,
271 RTA_IIF,
272 RTA_OIF,
273 RTA_GATEWAY,
274 RTA_PRIORITY,
275 RTA_PREFSRC,
276 RTA_METRICS,
277 RTA_MULTIPATH,
278 RTA_PROTOINFO, /* no longer used */
279 RTA_FLOW,
280 RTA_CACHEINFO,
281 RTA_SESSION, /* no longer used */
282 RTA_MP_ALGO, /* no longer used */
283 RTA_TABLE,
284 __RTA_MAX
287 #define RTA_MAX (__RTA_MAX - 1)
289 #define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
290 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
292 /* RTM_MULTIPATH --- array of struct rtnexthop.
294 * "struct rtnexthop" describes all necessary nexthop information,
295 * i.e. parameters of path to a destination via this nexthop.
297 * At the moment it is impossible to set different prefsrc, mtu, window
298 * and rtt for different paths from multipath.
301 struct rtnexthop
303 unsigned short rtnh_len;
304 unsigned char rtnh_flags;
305 unsigned char rtnh_hops;
306 int rtnh_ifindex;
309 /* rtnh_flags */
311 #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */
312 #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */
313 #define RTNH_F_ONLINK 4 /* Gateway is forced on link */
315 /* Macros to handle hexthops */
317 #define RTNH_ALIGNTO 4
318 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
319 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
320 ((int)(rtnh)->rtnh_len) <= (len))
321 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
322 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
323 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
324 #define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
326 /* RTM_CACHEINFO */
328 struct rta_cacheinfo
330 __u32 rta_clntref;
331 __u32 rta_lastuse;
332 __s32 rta_expires;
333 __u32 rta_error;
334 __u32 rta_used;
336 #define RTNETLINK_HAVE_PEERINFO 1
337 __u32 rta_id;
338 __u32 rta_ts;
339 __u32 rta_tsage;
342 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
344 enum
346 RTAX_UNSPEC,
347 #define RTAX_UNSPEC RTAX_UNSPEC
348 RTAX_LOCK,
349 #define RTAX_LOCK RTAX_LOCK
350 RTAX_MTU,
351 #define RTAX_MTU RTAX_MTU
352 RTAX_WINDOW,
353 #define RTAX_WINDOW RTAX_WINDOW
354 RTAX_RTT,
355 #define RTAX_RTT RTAX_RTT
356 RTAX_RTTVAR,
357 #define RTAX_RTTVAR RTAX_RTTVAR
358 RTAX_SSTHRESH,
359 #define RTAX_SSTHRESH RTAX_SSTHRESH
360 RTAX_CWND,
361 #define RTAX_CWND RTAX_CWND
362 RTAX_ADVMSS,
363 #define RTAX_ADVMSS RTAX_ADVMSS
364 RTAX_REORDERING,
365 #define RTAX_REORDERING RTAX_REORDERING
366 RTAX_HOPLIMIT,
367 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
368 RTAX_INITCWND,
369 #define RTAX_INITCWND RTAX_INITCWND
370 RTAX_FEATURES,
371 #define RTAX_FEATURES RTAX_FEATURES
372 RTAX_RTO_MIN,
373 #define RTAX_RTO_MIN RTAX_RTO_MIN
374 __RTAX_MAX
377 #define RTAX_MAX (__RTAX_MAX - 1)
379 #define RTAX_FEATURE_ECN 0x00000001
380 #define RTAX_FEATURE_SACK 0x00000002
381 #define RTAX_FEATURE_TIMESTAMP 0x00000004
382 #define RTAX_FEATURE_ALLFRAG 0x00000008
384 struct rta_session
386 __u8 proto;
387 __u8 pad1;
388 __u16 pad2;
390 union {
391 struct {
392 __u16 sport;
393 __u16 dport;
394 } ports;
396 struct {
397 __u8 type;
398 __u8 code;
399 __u16 ident;
400 } icmpt;
402 __u32 spi;
403 } u;
406 /****
407 * General form of address family dependent message.
408 ****/
410 struct rtgenmsg
412 unsigned char rtgen_family;
415 /*****************************************************************
416 * Link layer specific messages.
417 ****/
419 /* struct ifinfomsg
420 * passes link level specific information, not dependent
421 * on network protocol.
424 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 */
434 /********************************************************************
435 * prefix information
436 ****/
438 struct prefixmsg
440 unsigned char prefix_family;
441 unsigned char prefix_pad1;
442 unsigned short prefix_pad2;
443 int prefix_ifindex;
444 unsigned char prefix_type;
445 unsigned char prefix_len;
446 unsigned char prefix_flags;
447 unsigned char prefix_pad3;
450 enum
452 PREFIX_UNSPEC,
453 PREFIX_ADDRESS,
454 PREFIX_CACHEINFO,
455 __PREFIX_MAX
458 #define PREFIX_MAX (__PREFIX_MAX - 1)
460 struct prefix_cacheinfo
462 __u32 preferred_time;
463 __u32 valid_time;
467 /*****************************************************************
468 * Traffic control messages.
469 ****/
471 struct tcmsg
473 unsigned char tcm_family;
474 unsigned char tcm__pad1;
475 unsigned short tcm__pad2;
476 int tcm_ifindex;
477 __u32 tcm_handle;
478 __u32 tcm_parent;
479 __u32 tcm_info;
482 enum
484 TCA_UNSPEC,
485 TCA_KIND,
486 TCA_OPTIONS,
487 TCA_STATS,
488 TCA_XSTATS,
489 TCA_RATE,
490 TCA_FCNT,
491 TCA_STATS2,
492 TCA_STAB,
493 __TCA_MAX
496 #define TCA_MAX (__TCA_MAX - 1)
498 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
499 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
501 /********************************************************************
502 * Neighbor Discovery userland options
503 ****/
505 struct nduseroptmsg
507 unsigned char nduseropt_family;
508 unsigned char nduseropt_pad1;
509 unsigned short nduseropt_opts_len; /* Total length of options */
510 int nduseropt_ifindex;
511 __u8 nduseropt_icmp_type;
512 __u8 nduseropt_icmp_code;
513 unsigned short nduseropt_pad2;
514 unsigned int nduseropt_pad3;
515 /* Followed by one or more ND options */
518 enum
520 NDUSEROPT_UNSPEC,
521 NDUSEROPT_SRCADDR,
522 __NDUSEROPT_MAX
525 #define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1)
527 #ifndef __KERNEL__
528 /* RTnetlink multicast groups - backwards compatibility for userspace */
529 #define RTMGRP_LINK 1
530 #define RTMGRP_NOTIFY 2
531 #define RTMGRP_NEIGH 4
532 #define RTMGRP_TC 8
534 #define RTMGRP_IPV4_IFADDR 0x10
535 #define RTMGRP_IPV4_MROUTE 0x20
536 #define RTMGRP_IPV4_ROUTE 0x40
537 #define RTMGRP_IPV4_RULE 0x80
539 #define RTMGRP_IPV6_IFADDR 0x100
540 #define RTMGRP_IPV6_MROUTE 0x200
541 #define RTMGRP_IPV6_ROUTE 0x400
542 #define RTMGRP_IPV6_IFINFO 0x800
544 #define RTMGRP_DECnet_IFADDR 0x1000
545 #define RTMGRP_DECnet_ROUTE 0x4000
547 #define RTMGRP_IPV6_PREFIX 0x20000
548 #endif
550 /* RTnetlink multicast groups */
551 enum rtnetlink_groups {
552 RTNLGRP_NONE,
553 #define RTNLGRP_NONE RTNLGRP_NONE
554 RTNLGRP_LINK,
555 #define RTNLGRP_LINK RTNLGRP_LINK
556 RTNLGRP_NOTIFY,
557 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY
558 RTNLGRP_NEIGH,
559 #define RTNLGRP_NEIGH RTNLGRP_NEIGH
560 RTNLGRP_TC,
561 #define RTNLGRP_TC RTNLGRP_TC
562 RTNLGRP_IPV4_IFADDR,
563 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR
564 RTNLGRP_IPV4_MROUTE,
565 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE
566 RTNLGRP_IPV4_ROUTE,
567 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE
568 RTNLGRP_IPV4_RULE,
569 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE
570 RTNLGRP_IPV6_IFADDR,
571 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR
572 RTNLGRP_IPV6_MROUTE,
573 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE
574 RTNLGRP_IPV6_ROUTE,
575 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE
576 RTNLGRP_IPV6_IFINFO,
577 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO
578 RTNLGRP_DECnet_IFADDR,
579 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR
580 RTNLGRP_NOP2,
581 RTNLGRP_DECnet_ROUTE,
582 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE
583 RTNLGRP_DECnet_RULE,
584 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE
585 RTNLGRP_NOP4,
586 RTNLGRP_IPV6_PREFIX,
587 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX
588 RTNLGRP_IPV6_RULE,
589 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE
590 RTNLGRP_ND_USEROPT,
591 #define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT
592 RTNLGRP_PHONET_IFADDR,
593 #define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR
594 RTNLGRP_PHONET_ROUTE,
595 #define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE
596 __RTNLGRP_MAX
598 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1)
600 /* TC action piece */
601 struct tcamsg
603 unsigned char tca_family;
604 unsigned char tca__pad1;
605 unsigned short tca__pad2;
607 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
608 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
609 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
610 #define TCAA_MAX 1
612 /* End of information exported to user level */
614 #ifdef __KERNEL__
616 #include <linux/mutex.h>
618 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
620 int len = strlen(str) + 1;
621 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
624 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
625 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
626 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
627 u32 group, struct nlmsghdr *nlh, gfp_t flags);
628 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
629 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
630 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
631 u32 id, u32 ts, u32 tsage, long expires,
632 u32 error);
634 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
636 #define RTA_PUT(skb, attrtype, attrlen, data) \
637 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
638 goto rtattr_failure; \
639 __rta_fill(skb, attrtype, attrlen, data); })
641 #define RTA_APPEND(skb, attrlen, data) \
642 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
643 goto rtattr_failure; \
644 memcpy(skb_put(skb, attrlen), data, attrlen); })
646 #define RTA_PUT_NOHDR(skb, attrlen, data) \
647 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
648 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
649 RTA_ALIGN(attrlen) - attrlen); })
651 #define RTA_PUT_U8(skb, attrtype, value) \
652 ({ u8 _tmp = (value); \
653 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
655 #define RTA_PUT_U16(skb, attrtype, value) \
656 ({ u16 _tmp = (value); \
657 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
659 #define RTA_PUT_U32(skb, attrtype, value) \
660 ({ u32 _tmp = (value); \
661 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
663 #define RTA_PUT_U64(skb, attrtype, value) \
664 ({ u64 _tmp = (value); \
665 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
667 #define RTA_PUT_SECS(skb, attrtype, value) \
668 RTA_PUT_U64(skb, attrtype, (value) / HZ)
670 #define RTA_PUT_MSECS(skb, attrtype, value) \
671 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
673 #define RTA_PUT_STRING(skb, attrtype, value) \
674 RTA_PUT(skb, attrtype, strlen(value) + 1, value)
676 #define RTA_PUT_FLAG(skb, attrtype) \
677 RTA_PUT(skb, attrtype, 0, NULL);
679 #define RTA_NEST(skb, type) \
680 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
681 RTA_PUT(skb, type, 0, NULL); \
682 __start; })
684 #define RTA_NEST_END(skb, start) \
685 ({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
686 (skb)->len; })
688 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \
689 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
690 RTA_PUT(skb, type, attrlen, data); \
691 RTA_NEST(skb, type); \
692 __start; })
694 #define RTA_NEST_COMPAT_END(skb, start) \
695 ({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
696 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
697 RTA_NEST_END(skb, __nest); \
698 (skb)->len; })
700 #define RTA_NEST_CANCEL(skb, start) \
701 ({ if (start) \
702 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
703 -1; })
705 #define RTA_GET_U8(rta) \
706 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
707 goto rtattr_failure; \
708 *(u8 *) RTA_DATA(rta); })
710 #define RTA_GET_U16(rta) \
711 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
712 goto rtattr_failure; \
713 *(u16 *) RTA_DATA(rta); })
715 #define RTA_GET_U32(rta) \
716 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
717 goto rtattr_failure; \
718 *(u32 *) RTA_DATA(rta); })
720 #define RTA_GET_U64(rta) \
721 ({ u64 _tmp; \
722 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
723 goto rtattr_failure; \
724 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
725 _tmp; })
727 #define RTA_GET_FLAG(rta) (!!(rta))
729 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
730 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
732 static inline struct rtattr *
733 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
735 struct rtattr *rta;
736 int size = RTA_LENGTH(attrlen);
738 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
739 rta->rta_type = attrtype;
740 rta->rta_len = size;
741 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
742 return rta;
745 #define __RTA_PUT(skb, attrtype, attrlen) \
746 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
747 goto rtattr_failure; \
748 __rta_reserve(skb, attrtype, attrlen); })
750 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
752 /* RTNL is used as a global lock for all changes to network configuration */
753 extern void rtnl_lock(void);
754 extern void rtnl_unlock(void);
755 extern int rtnl_trylock(void);
756 extern int rtnl_is_locked(void);
758 extern void rtnetlink_init(void);
759 extern void __rtnl_unlock(void);
761 #define ASSERT_RTNL() do { \
762 if (unlikely(!rtnl_is_locked())) { \
763 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
764 __FILE__, __LINE__); \
765 dump_stack(); \
767 } while(0)
769 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
771 return RTA_GET_U32(rta[RTA_TABLE-1]);
772 rtattr_failure:
773 return table;
776 #endif /* __KERNEL__ */
779 #endif /* __LINUX_RTNETLINK_H */