rtnetlink.h 18 KB

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