1 /* 2 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 * 5 * Copyright (c) 1983, 1988, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgment: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)defs.h 8.1 (Berkeley) 6/5/93 37 * 38 * $FreeBSD: src/sbin/routed/defs.h,v 1.14 2000/08/11 08:24:38 sheldonh Exp $ 39 */ 40 41 #ifndef _DEFS_H 42 #define _DEFS_H 43 44 #pragma ident "%Z%%M% %I% %E% SMI" 45 46 /* 47 * Definitions for RIPv2 routing process. 48 * 49 * This code is based on the 4.4BSD `routed` daemon, with extensions to 50 * support: 51 * RIPv2, including variable length subnet masks. 52 * Router Discovery 53 * aggregate routes in the kernel tables. 54 * aggregate advertised routes. 55 * maintain spare routes for faster selection of another gateway 56 * when the current gateway dies. 57 * timers on routes with second granularity so that selection 58 * of a new route does not wait 30-60 seconds. 59 * tolerance of static routes. 60 * tell the kernel hop counts. 61 * use of per-interface ip_forwarding state. 62 * 63 * The vestigial support for other protocols has been removed. There 64 * is no likelihood that IETF RIPv1 or RIPv2 will ever be used with 65 * other protocols. The result is far smaller, faster, cleaner, and 66 * perhaps understandable. 67 * 68 * The accumulation of special flags and kludges added over the many 69 * years have been simplified and integrated. 70 */ 71 72 #ifdef __cplusplus 73 extern "C" { 74 #endif 75 76 #include <stdio.h> 77 #include <netdb.h> 78 #include <stdlib.h> 79 #include <unistd.h> 80 #include <errno.h> 81 #include <string.h> 82 #include <stdarg.h> 83 #include <syslog.h> 84 #include <time.h> 85 #include <md5.h> 86 #include <libintl.h> 87 #include <locale.h> 88 #include "radix.h" 89 90 #include <sys/time.h> 91 #include <sys/types.h> 92 #include <sys/param.h> 93 #include <sys/ioctl.h> 94 #include <sys/socket.h> 95 #include <sys/sysmacros.h> 96 97 #include <net/if.h> 98 #include <net/route.h> 99 #include <net/if_dl.h> 100 #include <netinet/in.h> 101 #include <arpa/inet.h> 102 #define RIPVERSION RIPv2 103 #include <protocols/routed.h> 104 105 106 #define DAY (24*60*60) 107 #define NEVER DAY /* a long time */ 108 #define EPOCH NEVER /* bias time by this to avoid <0 */ 109 110 /* 111 * Scan the kernel regularly to see if any interfaces have appeared or been 112 * turned off. 113 */ 114 #define CHECK_BAD_INTERVAL 5 /* when an interface is known bad */ 115 #define CHECK_ACT_INTERVAL 30 /* when advertising */ 116 #define CHECK_QUIET_INTERVAL 300 /* when not */ 117 118 /* 119 * Limit the seconds in the timeval structure "s" to "l" seconds, but only 120 * if l is less than the current seconds in s. This is used to shorten 121 * certain timers to ensure that scheduled events occur sooner than 122 * originally scheduled. 123 */ 124 #define LIM_SEC(s, l) ((s).tv_sec = MIN((s).tv_sec, (l))) 125 126 /* 127 * Metric used for fake default routes. It ought to be 15, but when 128 * processing advertised routes, previous versions of `routed` added 129 * to the received metric and discarded the route if the total was 16 130 * or larger. 131 */ 132 #define FAKE_METRIC (HOPCNT_INFINITY-2) 133 134 135 /* Router Discovery parameters */ 136 #define MAX_MAXADVERTISEINTERVAL 1800 137 #define MIN_MAXADVERTISEINTERVAL 4 138 #define DEF_MAXADVERTISEINTERVAL 600 139 #define DEF_PREFERENCELEVEL 0 140 #define MIN_PREFERENCELEVEL 0x80000000 141 142 #define MAX_INITIAL_ADVERT_INTERVAL 16 143 #define MAX_INITIAL_ADVERTS 3 144 #define MAX_RESPONSE_DELAY 2 145 146 #define MAX_SOLICITATION_DELAY 1 147 #define SOLICITATION_INTERVAL 3 148 #define MAX_SOLICITATIONS 3 149 150 /* 151 * convert between signed, balanced around zero, 152 * and unsigned zero-based preferences 153 */ 154 #define SIGN_PREF(p) ((p) ^ MIN_PREFERENCELEVEL) 155 #define UNSIGN_PREF(p) SIGN_PREF(p) 156 157 /* 158 * Bloated packet size for systems that simply add authentication to 159 * full-sized packets 160 */ 161 #define OVER_MAXPACKETSIZE (MAXPACKETSIZE+sizeof (struct netinfo)*2) 162 /* typical packet buffers */ 163 union pkt_buf { 164 uint8_t packet[OVER_MAXPACKETSIZE*2]; 165 struct rip rip; 166 }; 167 168 /* 169 * IF_NAME_LEN is the maximum size of interface names represented within 170 * in.routed. Regular Solaris interfaces have names of at most LIFNAMESIZ 171 * characters, but in.routed has remote interfaces represented internally 172 * as "remote(<gatewayname>)", where <gatewayname> is a hostname or IP 173 * address. IF_NAME_LEN needs to be large enough to also hold such 174 * interface names as well. 175 */ 176 #define IF_NAME_LEN (MAXHOSTNAMELEN + sizeof ("remote()") + 1) 177 178 /* 179 * No more routes than this, to protect ourself in case something goes 180 * whacko and starts broadcasting zillions of bogus routes. 181 */ 182 #define MAX_ROUTES (128*1024) 183 184 enum origin { 185 RO_NONE, /* empty slot */ 186 RO_RIP, /* learnt from RIP */ 187 RO_RDISC, /* learnt from RDISC */ 188 RO_STATIC, /* learnt from kernel */ 189 RO_LOOPBCK, /* loopback route */ 190 RO_PTOPT, /* point-to-point route */ 191 RO_NET_SYN, /* fake net route for subnet */ 192 RO_IF, /* interface route */ 193 RO_FILE /* from /etc/gateways */ 194 }; 195 196 /* 197 * Main, daemon routing table structure 198 */ 199 struct rt_spare { 200 struct interface *rts_ifp; 201 uint32_t rts_gate; /* forward packets here */ 202 uint32_t rts_router; /* on this router's authority */ 203 uint8_t rts_metric; 204 enum origin rts_origin; 205 uint16_t rts_tag; 206 time_t rts_time; /* timer to junk stale routes */ 207 uint32_t rts_de_ag; /* de-aggregation level */ 208 uint16_t rts_flags; 209 }; 210 211 #define RTS_EXTERNAL 0x0001 /* handled by other routing protocol e.g. EGP */ 212 #define SPARE_INC 2 213 #define EMPTY_RT_SPARE { NULL, 0, 0, HOPCNT_INFINITY, RO_NONE, 0, 0, 0, 0 } 214 215 struct rt_entry { 216 struct radix_node rt_nodes[2]; /* radix tree glue */ 217 struct sockaddr_in rt_dst_sock; 218 time_t rt_poison_time; /* advertised metric */ 219 in_addr_t rt_mask; 220 uint32_t rt_seqno; /* when last changed */ 221 uint16_t rt_state; 222 #define RS_IF 0x0001 /* for network interface */ 223 #define RS_NET_INT 0x0002 /* authority route */ 224 #define RS_NET_SYN 0x0004 /* fake net route for subnet */ 225 #define RS_NO_NET_SYN (RS_LOCAL | RS_IF) 226 #define RS_SUBNET 0x0008 /* subnet route from any source */ 227 #define RS_LOCAL 0x0010 /* loopback for pt-to-pt */ 228 #define RS_MHOME 0x0020 /* from -m */ 229 #define RS_STATIC 0x0040 /* from the kernel */ 230 #define RS_NOPROPAGATE 0x0080 /* route which must not be propagated */ 231 #define RS_BADIF 0x0100 /* route through dead ifp */ 232 233 uint8_t rt_poison_metric; /* to notice maximum recently */ 234 uint_t rt_num_spares; 235 struct rt_spare *rt_spares; 236 }; 237 #define rt_dst rt_dst_sock.sin_addr.s_addr 238 #define rt_ifp rt_spares[0].rts_ifp 239 #define rt_gate rt_spares[0].rts_gate 240 #define rt_router rt_spares[0].rts_router 241 #define rt_metric rt_spares[0].rts_metric 242 #define rt_tag rt_spares[0].rts_tag 243 #define rt_time rt_spares[0].rts_time 244 #define rt_de_ag rt_spares[0].rts_de_ag 245 246 #define HOST_MASK 0xffffffffU 247 #define RT_ISHOST(rt) ((rt)->rt_mask == HOST_MASK) 248 249 /* 250 * Determine if a route should be aged. Age all routes that are: 251 * Not from -g, -m, nor static routes from the kernel 252 * not unbroken interface routes but not broken interfaces 253 * not learnt from RDISC or from /etc/gateways 254 * nor non-passive, remote interfaces that are not aliases 255 * (i.e. remote & metric=0) 256 */ 257 #define AGE_RT(rt_state, rts_origin, ifp) \ 258 ((!((rt_state) & (RS_MHOME | RS_STATIC | RS_NET_SYN)) && \ 259 (rts_origin != RO_RDISC) && \ 260 (rts_origin != RO_FILE)) && \ 261 (!((rt_state) & RS_IF) || \ 262 (ifp) == NULL || \ 263 (((ifp)->int_state & IS_REMOTE) && \ 264 !((ifp)->int_state & IS_PASSIVE)))) 265 266 /* 267 * true if A is better than B 268 * Better if 269 * - A is not a poisoned route 270 * - and A is not stale 271 * - and either: 272 * - A has a shorter path 273 * - or the router is speaking for itself 274 * - or B has the same metric and isn't stale 275 * - or A is a host route advertised by a system for itself 276 */ 277 #define BETTER_LINK(rt, A, B) ((A)->rts_metric < HOPCNT_INFINITY && \ 278 now_stale <= (A)->rts_time && \ 279 ((A)->rts_metric < (B)->rts_metric || \ 280 ((A)->rts_gate == (A)->rts_router && \ 281 (B)->rts_gate != (B)->rts_router) || \ 282 ((A)->rts_metric == (B)->rts_metric && \ 283 now_stale > (B)->rts_time) || \ 284 (RT_ISHOST(rt) && \ 285 (rt)->rt_dst == (A)->rts_router && \ 286 (A)->rts_metric == (B)->rts_metric))) 287 288 struct hlinkage { 289 void *hl_next; 290 void **hl_prev; 291 }; 292 293 /* 294 * A "physical_interface" represents the actual hardware. It is also 295 * a container for a list of the interfaces that have the same ifIndex 296 * number. This will consist of zero or one "main" interface plus 297 * zero or more IS_ALIAS interfaces. 298 */ 299 struct physical_interface { 300 struct hlinkage phyi_link; 301 uint32_t phyi_index; 302 struct interface *phyi_interface; 303 struct phyi_data { 304 uint32_t ipackets; /* previous network stats */ 305 uint32_t ierrors; 306 uint32_t opackets; 307 uint32_t oerrors; 308 time_t ts; /* timestamp on network stats */ 309 } phyi_data; 310 char phyi_name[IF_NAME_LEN+1]; 311 }; 312 313 /* 314 * An "interface" is similar to a kernel ifnet structure, except it also 315 * handles "logical" or "IS_REMOTE" interfaces (remote gateways). 316 */ 317 struct interface { 318 /* 319 * We keep interfaces in a variety of data structures to 320 * optimize for different types of searches. 321 */ 322 struct hlinkage int_link; 323 #define int_next int_link.hl_next 324 struct hlinkage int_ahash; /* by address */ 325 struct hlinkage int_bhash; /* by broadcast address */ 326 struct hlinkage int_nhash; /* by name */ 327 struct hlinkage int_ilist; /* ifIndex list */ 328 struct physical_interface *int_phys; /* backpointer */ 329 char int_name[IF_NAME_LEN+1]; 330 in_addr_t int_addr; /* address on this host (net order) */ 331 in_addr_t int_brdaddr; /* broadcast address (n) */ 332 in_addr_t int_dstaddr; /* other end of pt-to-pt link (n) */ 333 in_addr_t int_net; /* working network # (host order) */ 334 in_addr_t int_mask; /* working net mask (host order) */ 335 in_addr_t int_ripv1_mask; /* for inferring a mask (n) */ 336 in_addr_t int_std_addr; /* class A/B/C address (n) */ 337 in_addr_t int_std_net; /* class A/B/C network (h) */ 338 in_addr_t int_std_mask; /* class A/B/C netmask (h) */ 339 in_addr_t int_ripout_addr; /* RIP pkts sent to this addr */ 340 uint64_t int_if_flags; /* some bits copied from kernel */ 341 uint32_t int_state; 342 time_t int_act_time; /* last thought healthy (IS_REMOTE) */ 343 time_t int_query_time; /* last query (IS_REMOTE) */ 344 uint32_t int_transitions; /* times gone up-down */ 345 uint8_t int_metric; 346 uint8_t int_d_metric; /* for faked default route */ 347 #define MAX_AUTH_KEYS 5 348 struct auth { /* authentication info */ 349 time_t start, end; 350 uint16_t type; 351 /* 352 * Although the following key is just an array of bytes, 353 * in.routed is currently limited to ascii characters 354 * because of its configuration syntax and parsing. 355 */ 356 uint8_t key[RIP_AUTH_PW_LEN +1]; 357 uint8_t keyid; 358 uint8_t warnedflag; 359 } int_auth[MAX_AUTH_KEYS]; 360 /* router discovery parameters */ 361 int int_rdisc_pref; /* signed preference to advertise */ 362 uint32_t int_rdisc_int; /* MaxAdvertiseInterval */ 363 uint32_t int_rdisc_cnt; 364 struct timeval int_rdisc_timer; 365 }; 366 367 /* bits in int_state */ 368 #define IS_ALIAS 0x00000001 /* interface alias */ 369 #define IS_SUBNET 0x00000002 /* interface on subnetted network */ 370 #define IS_REMOTE 0x00000004 /* interface is not on this machine */ 371 #define IS_PASSIVE 0x00000008 /* remote and does not do RIP */ 372 #define IS_EXTERNAL 0x00000010 /* handled by EGP or something */ 373 #define IS_CHECKED 0x00000020 /* still exists */ 374 #define IS_ALL_HOSTS 0x00000040 /* in INADDR_ALLHOSTS_GROUP */ 375 #define IS_ALL_ROUTERS 0x00000080 /* in INADDR_ALLROUTERS_GROUP */ 376 #define IS_DISTRUST 0x00000100 /* ignore untrusted routers */ 377 #define IS_REDIRECT_OK 0x00000200 /* accept ICMP redirects */ 378 #define IS_BROKE 0x00000400 /* seems to be broken */ 379 #define IS_SICK 0x00000800 /* seems to be broken */ 380 #define IS_DUP 0x00001000 /* duplicates another interface */ 381 #define IS_NEED_NET_SYN 0x00002000 /* need RS_NET_SYN route */ 382 #define IS_NO_AG 0x00004000 /* do not aggregate subnets */ 383 #define IS_NO_SUPER_AG 0x00008000 /* do not aggregate networks */ 384 #define IS_NO_RIPV1_IN 0x00010000 /* no RIPv1 input at all */ 385 #define IS_NO_RIPV2_IN 0x00020000 /* no RIPv2 input at all */ 386 #define IS_NO_RIP_IN (IS_NO_RIPV1_IN | IS_NO_RIPV2_IN) 387 #define IS_RIP_IN_OFF(s) (((s) & IS_NO_RIP_IN) == IS_NO_RIP_IN) 388 #define IS_NO_RIPV1_OUT 0x00040000 /* no RIPv1 output at all */ 389 #define IS_NO_RIPV2_OUT 0x00080000 /* no RIPv2 output at all */ 390 #define IS_NO_RIP_OUT (IS_NO_RIPV1_OUT | IS_NO_RIPV2_OUT) 391 #define IS_NO_RIP (IS_NO_RIP_OUT | IS_NO_RIP_IN) 392 #define IS_RIP_OUT_OFF(s) (((s) & IS_NO_RIP_OUT) == IS_NO_RIP_OUT) 393 #define IS_RIP_OFF(s) (((s) & IS_NO_RIP) == IS_NO_RIP) 394 #define IS_NO_RIP_MCAST 0x00100000 /* broadcast RIPv2 */ 395 #define IS_NO_ADV_IN 0x00200000 /* do not listen to advertisements */ 396 #define IS_NO_SOL_OUT 0x00400000 /* send no solicitations */ 397 #define IS_SOL_OUT 0x00800000 /* send solicitations */ 398 #define GROUP_IS_SOL_OUT (IS_SOL_OUT | IS_NO_SOL_OUT) 399 #define IS_NO_ADV_OUT 0x01000000 /* do not advertise rdisc */ 400 #define IS_ADV_OUT 0x02000000 /* advertise rdisc */ 401 #define GROUP_IS_ADV_OUT (IS_NO_ADV_OUT | IS_ADV_OUT) 402 #define IS_BCAST_RDISC 0x04000000 /* broadcast instead of multicast */ 403 #define IS_NO_RDISC (IS_NO_ADV_IN | IS_NO_SOL_OUT | IS_NO_ADV_OUT) 404 #define IS_PM_RDISC 0x08000000 /* poor-man's router discovery */ 405 #define IS_NO_HOST 0x10000000 /* disallow host routes */ 406 #define IS_SUPPRESS_RDISC 0x20000000 /* don't send rdisc advs */ 407 #define IS_FLUSH_RDISC 0x40000000 /* flush client rdisc caches */ 408 409 /* 410 * passive interfaces are added through gwkludge 411 */ 412 #define IS_PASSIVE_IFP(ifp) \ 413 (((ifp)->int_state & (IS_REMOTE|IS_PASSIVE|IS_EXTERNAL|IS_ALIAS)) == \ 414 (IS_REMOTE|IS_PASSIVE)) 415 416 /* 417 * Is an IP interface up? Because of the way IPMP uses deprecated 418 * interfaces, we need to check more than the IFF_UP and IFF_RUNNING 419 * interface flags here. Basically, we do not want to use IFF_DEPRECATED 420 * interfaces unless they are also IFF_STANDBY and not IFF_INACTIVE. 421 */ 422 #define IFF_GOOD (IFF_UP|IFF_RUNNING) 423 #define IS_IFF_UP(f) \ 424 ((((f) & (IFF_GOOD|IFF_DEPRECATED)) == IFF_GOOD) || \ 425 (((f) & (IFF_GOOD|IFF_INACTIVE|IFF_STANDBY)) == \ 426 (IFF_GOOD|IFF_STANDBY))) 427 428 /* 429 * This defines interfaces that we should not use for advertising or 430 * soliciting routes by way of RIP and rdisc. Interfaces marked this 431 * way do not count for purposes of determining how many interfaces 432 * this router has. 433 */ 434 #define IS_IFF_QUIET(f) ((f) & (IFF_LOOPBACK|IFF_NORTEXCH|IFF_NOXMIT)) 435 436 /* 437 * This defines interfaces that we can use for advertising routes by way of 438 * RIP and rdisc. 439 */ 440 #define IS_IFF_ROUTING(f) \ 441 (((f) & IFF_ROUTER) && !((f) & (IFF_NORTEXCH|IFF_NOXMIT))) 442 443 /* Information for aggregating routes */ 444 #define NUM_AG_SLOTS 32 445 struct ag_info { 446 struct ag_info *ag_fine; /* slot with finer netmask */ 447 struct ag_info *ag_cors; /* more coarse netmask */ 448 in_addr_t ag_dst_h; /* destination in host byte order */ 449 in_addr_t ag_mask; 450 in_addr_t ag_gate; 451 struct interface *ag_ifp; 452 in_addr_t ag_nhop; 453 uint8_t ag_metric; /* metric to be advertised */ 454 uint8_t ag_pref; /* aggregate based on this */ 455 uint32_t ag_seqno; 456 uint16_t ag_tag; 457 uint16_t ag_state; 458 #define AGS_SUPPRESS 0x001 /* combine with coarser mask */ 459 #define AGS_AGGREGATE 0x002 /* synthesize combined routes */ 460 #define AGS_REDUN0 0x004 /* redundant, finer routes output */ 461 #define AGS_REDUN1 0x008 462 #define AG_IS_REDUN(state) (((state) & (AGS_REDUN0 | AGS_REDUN1)) \ 463 == (AGS_REDUN0 | AGS_REDUN1)) 464 #define AGS_GATEWAY 0x010 /* tell kernel RTF_GATEWAY */ 465 #define AGS_IF 0x020 /* for an interface */ 466 #define AGS_RIPV2 0x040 /* send only as RIPv2 */ 467 #define AGS_FINE_GATE 0x080 /* ignore differing ag_gate when */ 468 /* this has the finer netmask */ 469 #define AGS_CORS_GATE 0x100 /* ignore differing gate when this */ 470 /* has the coarser netmasks */ 471 #define AGS_SPLIT_HZ 0x200 /* suppress for split horizon */ 472 #define AGS_PASSIVE 0x400 /* passive "remote" interface route */ 473 #define AGS_FILE 0x800 /* from /etc/gateways */ 474 475 /* some bits are set if they are set on either route */ 476 #define AGS_AGGREGATE_EITHER (AGS_RIPV2 | AGS_GATEWAY | \ 477 AGS_SUPPRESS | AGS_CORS_GATE) 478 }; 479 480 struct khash { 481 struct khash *k_next; 482 in_addr_t k_dst; 483 in_addr_t k_mask; 484 in_addr_t k_gate; 485 struct interface *k_ifp; 486 short k_metric; 487 ushort_t k_state; /* KS_* */ 488 time_t k_keep; 489 time_t k_redirect_time; /* when redirected route 1st seen */ 490 }; 491 492 /* bit flags for k_state; shared between table.c and trace.c */ 493 #define KS_NEW 0x0001 494 #define KS_DELETE 0x0002 /* need to delete the route */ 495 #define KS_ADD 0x0004 /* add to the kernel */ 496 #define KS_CHANGE 0x0008 /* tell kernel to change the route */ 497 #define KS_DEL_ADD 0x0010 /* delete & add to change the kernel */ 498 #define KS_STATIC 0x0020 /* Static flag in kernel */ 499 #define KS_GATEWAY 0x0040 /* G flag in kernel */ 500 #define KS_DYNAMIC 0x0080 /* result of redirect */ 501 #define KS_DELETED 0x0100 /* already deleted from kernel */ 502 #define KS_PRIVATE 0x0200 /* Private flag in kernel */ 503 #define KS_CHECK 0x0400 504 #define KS_IF 0x0800 /* interface route */ 505 #define KS_PASSIVE 0x1000 /* passive remote interface route */ 506 #define KS_DEPRE_IF 0x2000 /* IPMP deprecated interface route */ 507 #define KS_FILE 0x4000 /* from /etc/gateways */ 508 509 /* default router structure */ 510 struct dr { /* accumulated advertisements */ 511 struct interface *dr_ifp; 512 in_addr_t dr_gate; /* gateway */ 513 time_t dr_ts; /* when received */ 514 time_t dr_life; /* lifetime in host byte order */ 515 uint32_t dr_recv_pref; /* received but biased preference */ 516 uint32_t dr_pref; /* preference adjusted by metric */ 517 uint32_t dr_flags; 518 #define DR_CHANGED 1 /* received new info for known dr */ 519 }; 520 521 /* parameters for interfaces */ 522 struct parm { 523 struct parm *parm_next; 524 in_addr_t parm_net; 525 in_addr_t parm_mask; 526 in_addr_t parm_ripout_addr; 527 uint32_t parm_int_state; 528 int32_t parm_rdisc_pref; /* signed IRDP preference */ 529 uint32_t parm_rdisc_int; /* IRDP advertising interval */ 530 struct auth parm_auth[MAX_AUTH_KEYS]; 531 char parm_name[IF_NAME_LEN+1]; 532 uint8_t parm_d_metric; 533 }; 534 535 /* authority for internal networks */ 536 extern struct intnet { 537 struct intnet *intnet_next; 538 in_addr_t intnet_addr; /* network byte order */ 539 in_addr_t intnet_mask; 540 int8_t intnet_metric; 541 } *intnets; 542 543 /* 544 * Defined RIPv1 netmasks. These come from ripv1_mask entries in 545 * /etc/gateways of the form: 546 * 547 * ripv1_mask=<net>/<match>,<mask> 548 * 549 * The intended use of these structures is to give RIPv1 destinations which 550 * are in <net>/<match> a netmask of <mask>, where <mask> > <match>. 551 */ 552 extern struct r1net { 553 struct r1net *r1net_next; 554 in_addr_t r1net_net; /* host order */ 555 in_addr_t r1net_match; 556 in_addr_t r1net_mask; 557 } *r1nets; 558 559 /* trusted routers */ 560 extern struct tgate { 561 struct tgate *tgate_next; 562 in_addr_t tgate_addr; 563 #define MAX_TGATE_NETS 32 564 struct tgate_net { 565 in_addr_t net; /* host order */ 566 in_addr_t mask; 567 } tgate_nets[MAX_TGATE_NETS]; 568 } *tgates; 569 570 enum output_type {OUT_QUERY, OUT_UNICAST, OUT_BROADCAST, OUT_MULTICAST, 571 NO_OUT_MULTICAST, NO_OUT_RIPV2}; 572 573 /* common output buffers */ 574 extern struct ws_buf { 575 struct rip *buf; 576 struct netinfo *n; 577 struct netinfo *base; 578 struct netinfo *lim; 579 enum output_type type; 580 } v12buf; 581 582 extern int stopint; /* !=0 to stop in.routed */ 583 584 extern int rip_sock; /* RIP socket */ 585 extern struct interface *rip_sock_interface; /* current output interface */ 586 extern int rt_sock; /* routing socket */ 587 extern int rdisc_sock; /* router-discovery raw socket */ 588 589 extern boolean_t rip_enabled; /* is rip on? */ 590 extern boolean_t supplier; /* process should supply updates */ 591 extern boolean_t supplier_set; /* -s or -q requested */ 592 extern boolean_t save_space; /* -S option 1=treat all RIP speakers */ 593 extern boolean_t ridhosts; /* 1=reduce host routes */ 594 extern boolean_t mhome; /* 1=want multi-homed host route */ 595 extern boolean_t advertise_mhome; /* 1=must continue advertising it */ 596 extern boolean_t auth_ok; /* 1=ignore auth if we do not care */ 597 extern boolean_t no_install; /* 1=don't install in kernel */ 598 599 extern struct timeval clk; /* system clock's idea of time */ 600 extern struct timeval epoch; /* system clock when started */ 601 extern struct timeval now; /* current idea of time */ 602 extern time_t now_stale; 603 extern time_t now_expire; 604 extern time_t now_garbage; 605 606 extern struct timeval age_timer; /* next check of old routes */ 607 extern struct timeval no_flash; /* inhibit flash update until then */ 608 extern struct timeval rdisc_timer; /* next advert. or solicitation */ 609 extern boolean_t rdisc_ok; /* using solicited route */ 610 611 extern struct timeval ifscan_timer; /* time to check interfaces */ 612 613 extern in_addr_t loopaddr; /* our address on loopback */ 614 extern uint_t tot_interfaces; /* # of remote and local interfaces */ 615 extern uint_t rip_interfaces; /* # of interfaces doing RIP */ 616 extern uint_t ripout_interfaces; /* # of interfaces advertising RIP */ 617 extern uint_t fwd_interfaces; /* # of interfaces ip_forwarding=1 */ 618 extern struct interface *ifnet; /* all interfaces */ 619 extern size_t hash_table_sizes[]; /* list of primes for hash tables */ 620 extern boolean_t have_ripv1_out; /* have a RIPv1 interface */ 621 extern boolean_t need_flash; /* flash update needed */ 622 extern struct timeval need_kern; /* need to update kernel table */ 623 extern uint32_t update_seqno; /* a route has changed */ 624 extern struct interface dummy_ifp; /* wildcard interface */ 625 626 extern int tracelevel, new_tracelevel; 627 #define MAX_TRACELEVEL 5 628 #define TRACERTS (tracelevel >= 5) /* log routing socket contents */ 629 #define TRACEKERNEL (tracelevel >= 4) /* log kernel changes */ 630 #define TRACECONTENTS (tracelevel >= 3) /* display packet contents */ 631 #define TRACEPACKETS (tracelevel >= 2) /* note packets */ 632 #define TRACEACTIONS (tracelevel != 0) 633 extern FILE *ftrace; /* output trace file */ 634 extern char inittracename[MAXPATHLEN+1]; 635 636 extern struct radix_node_head *rhead; 637 638 extern void fix_sock(int, const char *); 639 extern void fix_select(void); 640 extern void rip_off(void); 641 extern void rip_on(struct interface *); 642 643 extern void bufinit(void); 644 extern int output(enum output_type, struct sockaddr_in *, 645 struct interface *, struct rip *, int); 646 extern void clr_ws_buf(struct ws_buf *, struct auth *); 647 extern void rip_query(void); 648 extern void rip_bcast(int); 649 extern void supply(struct sockaddr_in *, struct interface *, 650 enum output_type, int, int, boolean_t); 651 652 extern void msglog(const char *, ...); 653 extern void writelog(int, const char *, ...); 654 struct msg_limit { 655 time_t reuse; 656 struct msg_sub { 657 in_addr_t addr; 658 time_t until; 659 #define MSG_SUBJECT_N 8 660 } subs[MSG_SUBJECT_N]; 661 }; 662 extern void msglim(struct msg_limit *, in_addr_t, const char *, ...); 663 #define LOGERR(msg) msglog(msg ": %s", rip_strerror(errno)) 664 extern void logbad(boolean_t, const char *, ...); 665 #define BADERR(dump, msg) logbad(dump, msg ": %s", rip_strerror(errno)) 666 #ifdef DEBUG 667 #define DBGERR(dump, msg) BADERR(dump, msg) 668 #else 669 #define DBGERR(dump, msg) LOGERR(msg) 670 #endif 671 extern char *naddr_ntoa(in_addr_t); 672 extern const char *saddr_ntoa(struct sockaddr_storage *); 673 extern const char *rip_strerror(int errnum); 674 extern char *if_bit_string(uint_t, boolean_t); 675 676 extern void *rtmalloc(size_t, const char *); 677 extern void timevaladd(struct timeval *, struct timeval *); 678 extern void intvl_random(struct timeval *, ulong_t, ulong_t); 679 extern boolean_t getnet(const char *, in_addr_t *, in_addr_t *); 680 extern int gethost(char *, in_addr_t *); 681 extern void gwkludge(void); 682 extern const char *parse_parms(char *, boolean_t); 683 extern const char *insert_parm(struct parm *); 684 extern void get_parms(struct interface *); 685 686 extern void lastlog(void); 687 extern void trace_close(int); 688 extern void set_tracefile(const char *, const char *, int); 689 extern void tracelevel_msg(const char *, int); 690 extern void trace_off(const char *, ...); 691 extern void set_tracelevel(void); 692 extern void trace_flush(void); 693 extern void trace_misc(const char *, ...); 694 extern void trace_act(const char *, ...); 695 extern void trace_pkt(const char *, ...); 696 extern void trace_add_del(const char *, struct rt_entry *); 697 extern void trace_change(struct rt_entry *, uint16_t, struct rt_spare *, 698 const char *); 699 extern void trace_if(const char *, struct interface *); 700 extern void trace_khash(const struct khash *); 701 extern void trace_dr(const struct dr *); 702 extern void trace_upslot(struct rt_entry *, struct rt_spare *, 703 struct rt_spare *); 704 extern void trace_rip(const char *, const char *, struct sockaddr_in *, 705 struct interface *, struct rip *, int); 706 extern char *addrname(in_addr_t, in_addr_t, int); 707 extern char *rtname(in_addr_t, in_addr_t, in_addr_t); 708 709 extern void rdisc_age(in_addr_t); 710 extern void set_rdisc_mg(struct interface *, int); 711 extern void set_supplier(void); 712 extern void if_bad_rdisc(struct interface *); 713 extern void if_rewire_rdisc(struct interface *, struct interface *); 714 extern void if_ok_rdisc(struct interface *); 715 extern int read_rip(void); 716 extern void input_route(in_addr_t, in_addr_t, struct rt_spare *, 717 struct netinfo *, uint16_t); 718 extern void read_rt(void); 719 extern void read_d(void); 720 extern void rdisc_adv(boolean_t); 721 extern void rdisc_sol(void); 722 extern struct interface *receiving_interface(struct msghdr *, boolean_t); 723 extern void *find_ancillary(struct msghdr *, int); 724 extern boolean_t should_supply(struct interface *); 725 extern void rdisc_dump(void); 726 extern void rdisc_suppress(struct interface *); 727 extern void rdisc_restore(struct interface *); 728 729 extern void age_peer_info(void); 730 731 extern void sigtrace_more(int); 732 extern void sigtrace_less(int); 733 extern void sigtrace_dump(int); 734 735 extern void sync_kern(void); 736 extern void age(in_addr_t); 737 extern void kern_dump(void); 738 extern void kern_flush_ifp(struct interface *); 739 extern void kern_rewire_ifp(struct interface *, struct interface *); 740 741 extern void ag_flush(in_addr_t, in_addr_t, void (*)(struct ag_info *)); 742 extern void ag_check(in_addr_t, in_addr_t, in_addr_t, struct interface *, 743 in_addr_t, uint8_t, uint8_t, uint32_t, uint16_t, uint16_t, 744 void (*)(struct ag_info *)); 745 extern void del_static(in_addr_t, in_addr_t, in_addr_t, 746 struct interface *, int); 747 extern void del_redirects(in_addr_t, time_t); 748 extern struct rt_entry *rtget(in_addr_t, in_addr_t); 749 extern struct rt_entry *rtfind(in_addr_t); 750 extern void rtinit(void); 751 extern void rtadd(in_addr_t, in_addr_t, uint16_t, struct rt_spare *); 752 extern void rtchange(struct rt_entry *, uint16_t, struct rt_spare *, 753 char *); 754 extern void rtdelete(struct rt_entry *); 755 extern void rts_delete(struct rt_entry *, struct rt_spare *); 756 extern void rtbad_sub(struct rt_entry *, struct interface *); 757 extern void rtswitch(struct rt_entry *, struct rt_spare *); 758 759 #define S_ADDR(x) (((struct sockaddr_in *)(x))->sin_addr.s_addr) 760 #define INFO_DST(I) ((I)->rti_info[RTAX_DST]) 761 #define INFO_GATE(I) ((I)->rti_info[RTAX_GATEWAY]) 762 #define INFO_MASK(I) ((I)->rti_info[RTAX_NETMASK]) 763 #define INFO_AUTHOR(I) ((I)->rti_info[RTAX_AUTHOR]) 764 765 struct rewire_data { 766 struct interface *if_old; 767 struct interface *if_new; 768 int metric_delta; 769 }; 770 771 extern char *qstring(const uchar_t *, int); 772 extern in_addr_t std_mask(in_addr_t); 773 extern int parse_quote(char **, const char *, char *, char *, int); 774 extern in_addr_t ripv1_mask_net(in_addr_t, const struct interface *); 775 extern in_addr_t ripv1_mask_host(in_addr_t, const struct interface *); 776 #define on_net(a, net, mask) (((ntohl(a) ^ (net)) & (mask)) == 0) 777 extern boolean_t check_dst(in_addr_t); 778 extern boolean_t remote_address_ok(struct interface *, in_addr_t); 779 extern struct interface *check_dup(const char *, in_addr_t, in_addr_t, 780 in_addr_t, uint64_t, boolean_t); 781 extern boolean_t check_remote(struct interface *); 782 extern void iftbl_alloc(void); 783 extern void ifscan(void); 784 extern int walk_bad(struct radix_node *, void *); 785 extern int walk_rewire(struct radix_node *, void *); 786 extern void if_ok(struct interface *, const char *, boolean_t); 787 extern void if_sick(struct interface *, boolean_t); 788 extern void if_link(struct interface *, uint32_t); 789 extern struct interface *ifwithaddr(in_addr_t, boolean_t, boolean_t); 790 extern struct interface *ifwithindex(ulong_t, boolean_t); 791 extern struct interface *ifwithname(const char *); 792 extern struct interface *findremoteif(in_addr_t); 793 extern struct interface *findifaddr(in_addr_t); 794 extern struct interface *iflookup(in_addr_t); 795 extern struct auth *find_auth(struct interface *); 796 extern void end_md5_auth(struct ws_buf *, struct auth *); 797 extern void rip_mcast_on(struct interface *); 798 extern void rip_mcast_off(struct interface *); 799 extern void trace_dump(); 800 801 #ifdef __cplusplus 802 } 803 #endif 804 805 #endif /* _DEFS_H */ 806