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>
11 * Routing/neighbour discovery messages.
14 /* Types of messages */
18 #define RTM_BASE RTM_BASE
21 #define RTM_NEWLINK RTM_NEWLINK
23 #define RTM_DELLINK RTM_DELLINK
25 #define RTM_GETLINK RTM_GETLINK
27 #define RTM_SETLINK RTM_SETLINK
30 #define RTM_NEWADDR RTM_NEWADDR
32 #define RTM_DELADDR RTM_DELADDR
34 #define RTM_GETADDR RTM_GETADDR
37 #define RTM_NEWROUTE RTM_NEWROUTE
39 #define RTM_DELROUTE RTM_DELROUTE
41 #define RTM_GETROUTE RTM_GETROUTE
44 #define RTM_NEWNEIGH RTM_NEWNEIGH
46 #define RTM_DELNEIGH RTM_DELNEIGH
48 #define RTM_GETNEIGH RTM_GETNEIGH
51 #define RTM_NEWRULE RTM_NEWRULE
53 #define RTM_DELRULE RTM_DELRULE
55 #define RTM_GETRULE RTM_GETRULE
58 #define RTM_NEWQDISC RTM_NEWQDISC
60 #define RTM_DELQDISC RTM_DELQDISC
62 #define RTM_GETQDISC RTM_GETQDISC
65 #define RTM_NEWTCLASS RTM_NEWTCLASS
67 #define RTM_DELTCLASS RTM_DELTCLASS
69 #define RTM_GETTCLASS RTM_GETTCLASS
72 #define RTM_NEWTFILTER RTM_NEWTFILTER
74 #define RTM_DELTFILTER RTM_DELTFILTER
76 #define RTM_GETTFILTER RTM_GETTFILTER
79 #define RTM_NEWACTION RTM_NEWACTION
81 #define RTM_DELACTION RTM_DELACTION
83 #define RTM_GETACTION RTM_GETACTION
86 #define RTM_NEWPREFIX RTM_NEWPREFIX
88 RTM_GETMULTICAST
= 58,
89 #define RTM_GETMULTICAST RTM_GETMULTICAST
92 #define RTM_GETANYCAST RTM_GETANYCAST
95 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
97 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
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
107 #define RTM_DELADDRLABEL RTM_DELADDRLABEL
109 #define RTM_GETADDRLABEL RTM_GETADDRLABEL
112 #define RTM_GETDCB RTM_GETDCB
114 #define RTM_SETDCB RTM_SETDCB
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
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.
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 */
177 RTN_UNICAST
, /* Gateway or direct route */
178 RTN_LOCAL
, /* Accept locally */
179 RTN_BROADCAST
, /* Accept locally 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 */
193 #define RTN_MAX (__RTN_MAX - 1)
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
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 */
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.
236 /* User defined values */
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 */
255 /* User defined values */
257 RT_TABLE_DEFAULT
=253,
260 RT_TABLE_MAX
=0xFFFFFFFF
264 /* Routing message attributes */
278 RTA_PROTOINFO
, /* no longer used */
281 RTA_SESSION
, /* no longer used */
282 RTA_MP_ALGO
, /* no longer used */
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.
303 unsigned short rtnh_len
;
304 unsigned char rtnh_flags
;
305 unsigned char rtnh_hops
;
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)))
336 #define RTNETLINK_HAVE_PEERINFO 1
342 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
347 #define RTAX_UNSPEC RTAX_UNSPEC
349 #define RTAX_LOCK RTAX_LOCK
351 #define RTAX_MTU RTAX_MTU
353 #define RTAX_WINDOW RTAX_WINDOW
355 #define RTAX_RTT RTAX_RTT
357 #define RTAX_RTTVAR RTAX_RTTVAR
359 #define RTAX_SSTHRESH RTAX_SSTHRESH
361 #define RTAX_CWND RTAX_CWND
363 #define RTAX_ADVMSS RTAX_ADVMSS
365 #define RTAX_REORDERING RTAX_REORDERING
367 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
369 #define RTAX_INITCWND RTAX_INITCWND
371 #define RTAX_FEATURES RTAX_FEATURES
373 #define RTAX_RTO_MIN RTAX_RTO_MIN
377 #define RTAX_MAX (__RTAX_MAX - 1)
379 #define RTAX_FEATURE_ECN 0x00000001
380 #define RTAX_FEATURE_NO_SACK 0x00000002
381 #define RTAX_FEATURE_NO_TSTAMP 0x00000004
382 #define RTAX_FEATURE_ALLFRAG 0x00000008
383 #define RTAX_FEATURE_NO_WSCALE 0x00000010
384 #define RTAX_FEATURE_NO_DSACK 0x00000020
409 * General form of address family dependent message.
414 unsigned char rtgen_family
;
417 /*****************************************************************
418 * Link layer specific messages.
422 * passes link level specific information, not dependent
423 * on network protocol.
428 unsigned char ifi_family
;
429 unsigned char __ifi_pad
;
430 unsigned short ifi_type
; /* ARPHRD_* */
431 int ifi_index
; /* Link index */
432 unsigned ifi_flags
; /* IFF_* flags */
433 unsigned ifi_change
; /* IFF_* change mask */
436 /********************************************************************
442 unsigned char prefix_family
;
443 unsigned char prefix_pad1
;
444 unsigned short prefix_pad2
;
446 unsigned char prefix_type
;
447 unsigned char prefix_len
;
448 unsigned char prefix_flags
;
449 unsigned char prefix_pad3
;
460 #define PREFIX_MAX (__PREFIX_MAX - 1)
462 struct prefix_cacheinfo
464 __u32 preferred_time
;
469 /*****************************************************************
470 * Traffic control messages.
475 unsigned char tcm_family
;
476 unsigned char tcm__pad1
;
477 unsigned short tcm__pad2
;
498 #define TCA_MAX (__TCA_MAX - 1)
500 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
501 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
503 /********************************************************************
504 * Neighbor Discovery userland options
509 unsigned char nduseropt_family
;
510 unsigned char nduseropt_pad1
;
511 unsigned short nduseropt_opts_len
; /* Total length of options */
512 int nduseropt_ifindex
;
513 __u8 nduseropt_icmp_type
;
514 __u8 nduseropt_icmp_code
;
515 unsigned short nduseropt_pad2
;
516 unsigned int nduseropt_pad3
;
517 /* Followed by one or more ND options */
527 #define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1)
530 /* RTnetlink multicast groups - backwards compatibility for userspace */
531 #define RTMGRP_LINK 1
532 #define RTMGRP_NOTIFY 2
533 #define RTMGRP_NEIGH 4
536 #define RTMGRP_IPV4_IFADDR 0x10
537 #define RTMGRP_IPV4_MROUTE 0x20
538 #define RTMGRP_IPV4_ROUTE 0x40
539 #define RTMGRP_IPV4_RULE 0x80
541 #define RTMGRP_IPV6_IFADDR 0x100
542 #define RTMGRP_IPV6_MROUTE 0x200
543 #define RTMGRP_IPV6_ROUTE 0x400
544 #define RTMGRP_IPV6_IFINFO 0x800
546 #define RTMGRP_DECnet_IFADDR 0x1000
547 #define RTMGRP_DECnet_ROUTE 0x4000
549 #define RTMGRP_IPV6_PREFIX 0x20000
552 /* RTnetlink multicast groups */
553 enum rtnetlink_groups
{
555 #define RTNLGRP_NONE RTNLGRP_NONE
557 #define RTNLGRP_LINK RTNLGRP_LINK
559 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY
561 #define RTNLGRP_NEIGH RTNLGRP_NEIGH
563 #define RTNLGRP_TC RTNLGRP_TC
565 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR
567 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE
569 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE
571 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE
573 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR
575 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE
577 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE
579 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO
580 RTNLGRP_DECnet_IFADDR
,
581 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR
583 RTNLGRP_DECnet_ROUTE
,
584 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE
586 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE
589 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX
591 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE
593 #define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT
594 RTNLGRP_PHONET_IFADDR
,
595 #define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR
596 RTNLGRP_PHONET_ROUTE
,
597 #define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE
600 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1)
602 /* TC action piece */
605 unsigned char tca_family
;
606 unsigned char tca__pad1
;
607 unsigned short tca__pad2
;
609 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
610 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
611 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
614 /* End of information exported to user level */
618 #include <linux/mutex.h>
620 static __inline__
int rtattr_strcmp(const struct rtattr
*rta
, const char *str
)
622 int len
= strlen(str
) + 1;
623 return len
> rta
->rta_len
|| memcmp(RTA_DATA(rta
), str
, len
);
626 extern int rtnetlink_send(struct sk_buff
*skb
, struct net
*net
, u32 pid
, u32 group
, int echo
);
627 extern int rtnl_unicast(struct sk_buff
*skb
, struct net
*net
, u32 pid
);
628 extern void rtnl_notify(struct sk_buff
*skb
, struct net
*net
, u32 pid
,
629 u32 group
, struct nlmsghdr
*nlh
, gfp_t flags
);
630 extern void rtnl_set_sk_err(struct net
*net
, u32 group
, int error
);
631 extern int rtnetlink_put_metrics(struct sk_buff
*skb
, u32
*metrics
);
632 extern int rtnl_put_cacheinfo(struct sk_buff
*skb
, struct dst_entry
*dst
,
633 u32 id
, u32 ts
, u32 tsage
, long expires
,
636 extern void __rta_fill(struct sk_buff
*skb
, int attrtype
, int attrlen
, const void *data
);
638 #define RTA_PUT(skb, attrtype, attrlen, data) \
639 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
640 goto rtattr_failure; \
641 __rta_fill(skb, attrtype, attrlen, data); })
643 #define RTA_APPEND(skb, attrlen, data) \
644 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
645 goto rtattr_failure; \
646 memcpy(skb_put(skb, attrlen), data, attrlen); })
648 #define RTA_PUT_NOHDR(skb, attrlen, data) \
649 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
650 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
651 RTA_ALIGN(attrlen) - attrlen); })
653 #define RTA_PUT_U8(skb, attrtype, value) \
654 ({ u8 _tmp = (value); \
655 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
657 #define RTA_PUT_U16(skb, attrtype, value) \
658 ({ u16 _tmp = (value); \
659 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
661 #define RTA_PUT_U32(skb, attrtype, value) \
662 ({ u32 _tmp = (value); \
663 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
665 #define RTA_PUT_U64(skb, attrtype, value) \
666 ({ u64 _tmp = (value); \
667 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
669 #define RTA_PUT_SECS(skb, attrtype, value) \
670 RTA_PUT_U64(skb, attrtype, (value) / HZ)
672 #define RTA_PUT_MSECS(skb, attrtype, value) \
673 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
675 #define RTA_PUT_STRING(skb, attrtype, value) \
676 RTA_PUT(skb, attrtype, strlen(value) + 1, value)
678 #define RTA_PUT_FLAG(skb, attrtype) \
679 RTA_PUT(skb, attrtype, 0, NULL);
681 #define RTA_NEST(skb, type) \
682 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
683 RTA_PUT(skb, type, 0, NULL); \
686 #define RTA_NEST_END(skb, start) \
687 ({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
690 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \
691 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
692 RTA_PUT(skb, type, attrlen, data); \
693 RTA_NEST(skb, type); \
696 #define RTA_NEST_COMPAT_END(skb, start) \
697 ({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
698 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
699 RTA_NEST_END(skb, __nest); \
702 #define RTA_NEST_CANCEL(skb, start) \
704 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
707 #define RTA_GET_U8(rta) \
708 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
709 goto rtattr_failure; \
710 *(u8 *) RTA_DATA(rta); })
712 #define RTA_GET_U16(rta) \
713 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
714 goto rtattr_failure; \
715 *(u16 *) RTA_DATA(rta); })
717 #define RTA_GET_U32(rta) \
718 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
719 goto rtattr_failure; \
720 *(u32 *) RTA_DATA(rta); })
722 #define RTA_GET_U64(rta) \
724 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
725 goto rtattr_failure; \
726 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
729 #define RTA_GET_FLAG(rta) (!!(rta))
731 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
732 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
734 static inline struct rtattr
*
735 __rta_reserve(struct sk_buff
*skb
, int attrtype
, int attrlen
)
738 int size
= RTA_LENGTH(attrlen
);
740 rta
= (struct rtattr
*)skb_put(skb
, RTA_ALIGN(size
));
741 rta
->rta_type
= attrtype
;
743 memset(RTA_DATA(rta
) + attrlen
, 0, RTA_ALIGN(size
) - size
);
747 #define __RTA_PUT(skb, attrtype, attrlen) \
748 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
749 goto rtattr_failure; \
750 __rta_reserve(skb, attrtype, attrlen); })
752 extern void rtmsg_ifinfo(int type
, struct net_device
*dev
, unsigned change
);
754 /* RTNL is used as a global lock for all changes to network configuration */
755 extern void rtnl_lock(void);
756 extern void rtnl_unlock(void);
757 extern int rtnl_trylock(void);
758 extern int rtnl_is_locked(void);
760 extern void rtnetlink_init(void);
761 extern void __rtnl_unlock(void);
763 #define ASSERT_RTNL() do { \
764 if (unlikely(!rtnl_is_locked())) { \
765 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
766 __FILE__, __LINE__); \
771 static inline u32
rtm_get_table(struct rtattr
**rta
, u8 table
)
773 return RTA_GET_U32(rta
[RTA_TABLE
-1]);
778 #endif /* __KERNEL__ */
781 #endif /* __LINUX_RTNETLINK_H */
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