1 /* 2 * Copyright (c) 1983, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgment: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)defs.h 8.1 (Berkeley) 6/5/93 34 * 35 * $FreeBSD: src/sbin/routed/defs.h,v 1.13 1999/09/05 17:49:11 peter Exp $ 36 * $DragonFly: src/sbin/routed/defs.h,v 1.2 2003/06/17 04:27:34 dillon Exp $ 37 */ 38 39 #ifdef sgi 40 #ident "$FreeBSD: src/sbin/routed/defs.h,v 1.13 1999/09/05 17:49:11 peter Exp $" 41 #endif 42 43 /* Definitions for RIPv2 routing process. 44 * 45 * This code is based on the 4.4BSD `routed` daemon, with extensions to 46 * support: 47 * RIPv2, including variable length subnet masks. 48 * Router Discovery 49 * aggregate routes in the kernel tables. 50 * aggregate advertised routes. 51 * maintain spare routes for faster selection of another gateway 52 * when the current gateway dies. 53 * timers on routes with second granularity so that selection 54 * of a new route does not wait 30-60 seconds. 55 * tolerance of static routes. 56 * tell the kernel hop counts 57 * do not advertise if ipforwarding=0 58 * 59 * The vestigial support for other protocols has been removed. There 60 * is no likelihood that IETF RIPv1 or RIPv2 will ever be used with 61 * other protocols. The result is far smaller, faster, cleaner, and 62 * perhaps understandable. 63 * 64 * The accumulation of special flags and kludges added over the many 65 * years have been simplified and integrated. 66 */ 67 68 #include <stdio.h> 69 #include <netdb.h> 70 #include <stdlib.h> 71 #include <unistd.h> 72 #include <errno.h> 73 #include <string.h> 74 #ifdef sgi 75 #include <strings.h> 76 #include <bstring.h> 77 #endif 78 #include <stdarg.h> 79 #include <syslog.h> 80 #include <time.h> 81 #include <sys/cdefs.h> 82 #include <sys/time.h> 83 #include <sys/types.h> 84 #include <sys/param.h> 85 #include <sys/ioctl.h> 86 #include <sys/sysctl.h> 87 #include <sys/socket.h> 88 #ifdef sgi 89 #define _USER_ROUTE_TREE 90 #include <net/radix.h> 91 #else 92 #include "radix.h" 93 #define UNUSED __attribute__((unused)) 94 #define PATTRIB(f,l) __attribute__((format (printf,f,l))) 95 #endif 96 #include <net/if.h> 97 #include <net/route.h> 98 #include <net/if_dl.h> 99 #include <netinet/in.h> 100 #include <arpa/inet.h> 101 #define RIPVERSION RIPv2 102 #include <protocols/routed.h> 103 104 105 /* Type of an IP address. 106 * Some systems do not like to pass structures, so do not use in_addr. 107 * Some systems think a long has 64 bits, which would be a gross waste. 108 * So define it here so it can be changed for the target system. 109 * It should be defined somewhere netinet/in.h, but it is not. 110 */ 111 #ifdef sgi 112 #define naddr u_int32_t 113 #elif defined (__NetBSD__) 114 #define naddr u_int32_t 115 #define _HAVE_SA_LEN 116 #define _HAVE_SIN_LEN 117 #else 118 #define naddr u_long 119 #define _HAVE_SA_LEN 120 #define _HAVE_SIN_LEN 121 #endif 122 123 /* Turn on if IP_DROP_MEMBERSHIP and IP_ADD_MEMBERSHIP do not look at 124 * the dstaddr of point-to-point interfaces. 125 */ 126 #ifdef __NetBSD__ 127 #define MCAST_PPP_BUG 128 #endif 129 130 #define DAY (24*60*60) 131 #define NEVER DAY /* a long time */ 132 #define EPOCH NEVER /* bias time by this to avoid <0 */ 133 134 /* Scan the kernel regularly to see if any interfaces have appeared or been 135 * turned off. These must be less than STALE_TIME. 136 */ 137 #define CHECK_BAD_INTERVAL 5 /* when an interface is known bad */ 138 #define CHECK_ACT_INTERVAL 30 /* when advertising */ 139 #define CHECK_QUIET_INTERVAL 300 /* when not */ 140 141 #define LIM_SEC(s,l) ((s).tv_sec = MIN((s).tv_sec, (l))) 142 143 /* Metric used for fake default routes. It ought to be 15, but when 144 * processing advertised routes, previous versions of `routed` added 145 * to the received metric and discarded the route if the total was 16 146 * or larger. 147 */ 148 #define FAKE_METRIC (HOPCNT_INFINITY-2) 149 150 151 /* Router Discovery parameters */ 152 #ifndef sgi 153 #define INADDR_ALLROUTERS_GROUP 0xe0000002 /* 224.0.0.2 */ 154 #endif 155 #define MaxMaxAdvertiseInterval 1800 156 #define MinMaxAdvertiseInterval 4 157 #define DefMaxAdvertiseInterval 600 158 #define DEF_PreferenceLevel 0 159 #define MIN_PreferenceLevel 0x80000000 160 161 #define MAX_INITIAL_ADVERT_INTERVAL 16 162 #define MAX_INITIAL_ADVERTS 3 163 #define MAX_RESPONSE_DELAY 2 164 165 #define MAX_SOLICITATION_DELAY 1 166 #define SOLICITATION_INTERVAL 3 167 #define MAX_SOLICITATIONS 3 168 169 170 /* Bloated packet size for systems that simply add authentication to 171 * full-sized packets 172 */ 173 #define OVER_MAXPACKETSIZE (MAXPACKETSIZE+sizeof(struct netinfo)*2) 174 /* typical packet buffers */ 175 union pkt_buf { 176 char packet[OVER_MAXPACKETSIZE*2]; 177 struct rip rip; 178 }; 179 180 #define GNAME_LEN 64 /* assumed=64 in parms.c */ 181 /* bigger than IFNAMSIZ, with room for "external()" or "remote()" */ 182 #define IF_NAME_LEN (GNAME_LEN+15) 183 184 /* No more routes than this, to protect ourself in case something goes 185 * whacko and starts broadcasting zillions of bogus routes. 186 */ 187 #define MAX_ROUTES (128*1024) 188 extern int total_routes; 189 190 /* Main, daemon routing table structure 191 */ 192 struct rt_entry { 193 struct radix_node rt_nodes[2]; /* radix tree glue */ 194 u_int rt_state; 195 # define RS_IF 0x001 /* for network interface */ 196 # define RS_NET_INT 0x002 /* authority route */ 197 # define RS_NET_SYN 0x004 /* fake net route for subnet */ 198 # define RS_NO_NET_SYN (RS_LOCAL | RS_LOCAL | RS_IF) 199 # define RS_SUBNET 0x008 /* subnet route from any source */ 200 # define RS_LOCAL 0x010 /* loopback for pt-to-pt */ 201 # define RS_MHOME 0x020 /* from -m */ 202 # define RS_STATIC 0x040 /* from the kernel */ 203 # define RS_RDISC 0x080 /* from router discovery */ 204 struct sockaddr_in rt_dst_sock; 205 naddr rt_mask; 206 struct rt_spare { 207 struct interface *rts_ifp; 208 naddr rts_gate; /* forward packets here */ 209 naddr rts_router; /* on the authority of this router */ 210 char rts_metric; 211 u_short rts_tag; 212 time_t rts_time; /* timer to junk stale routes */ 213 u_int rts_de_ag; /* de-aggregation level */ 214 #define NUM_SPARES 4 215 } rt_spares[NUM_SPARES]; 216 u_int rt_seqno; /* when last changed */ 217 char rt_poison_metric; /* to notice maximum recently */ 218 time_t rt_poison_time; /* advertised metric */ 219 }; 220 #define rt_dst rt_dst_sock.sin_addr.s_addr 221 #define rt_ifp rt_spares[0].rts_ifp 222 #define rt_gate rt_spares[0].rts_gate 223 #define rt_router rt_spares[0].rts_router 224 #define rt_metric rt_spares[0].rts_metric 225 #define rt_tag rt_spares[0].rts_tag 226 #define rt_time rt_spares[0].rts_time 227 #define rt_de_ag rt_spares[0].rts_de_ag 228 229 #define HOST_MASK 0xffffffff 230 #define RT_ISHOST(rt) ((rt)->rt_mask == HOST_MASK) 231 232 /* age all routes that 233 * are not from -g, -m, or static routes from the kernel 234 * not unbroken interface routes 235 * but not broken interfaces 236 * nor non-passive, remote interfaces that are not aliases 237 * (i.e. remote & metric=0) 238 */ 239 #define AGE_RT(rt_state,ifp) (0 == ((rt_state) & (RS_MHOME | RS_STATIC \ 240 | RS_NET_SYN | RS_RDISC)) \ 241 && (!((rt_state) & RS_IF) \ 242 || (ifp) == 0 \ 243 || (((ifp)->int_state & IS_REMOTE) \ 244 && !((ifp)->int_state & IS_PASSIVE)))) 245 246 /* true if A is better than B 247 * Better if 248 * - A is not a poisoned route 249 * - and A is not stale 250 * - and A has a shorter path 251 * - or is the router speaking for itself 252 * - or the current route is equal but stale 253 * - or it is a host route advertised by a system for itself 254 */ 255 #define BETTER_LINK(rt,A,B) ((A)->rts_metric < HOPCNT_INFINITY \ 256 && now_stale <= (A)->rts_time \ 257 && ((A)->rts_metric < (B)->rts_metric \ 258 || ((A)->rts_gate == (A)->rts_router \ 259 && (B)->rts_gate != (B)->rts_router) \ 260 || ((A)->rts_metric == (B)->rts_metric \ 261 && now_stale > (B)->rts_time) \ 262 || (RT_ISHOST(rt) \ 263 && (rt)->rt_dst == (A)->rts_router \ 264 && (A)->rts_metric == (B)->rts_metric))) 265 266 267 /* An "interface" is similar to a kernel ifnet structure, except it also 268 * handles "logical" or "IS_REMOTE" interfaces (remote gateways). 269 */ 270 struct interface { 271 struct interface *int_next, **int_prev; 272 struct interface *int_ahash, **int_ahash_prev; 273 struct interface *int_bhash, **int_bhash_prev; 274 struct interface *int_rlink, **int_rlink_prev; 275 struct interface *int_nhash, **int_nhash_prev; 276 char int_name[IF_NAME_LEN+1]; 277 u_short int_index; 278 naddr int_addr; /* address on this host (net order) */ 279 naddr int_brdaddr; /* broadcast address (n) */ 280 naddr int_dstaddr; /* other end of pt-to-pt link (n) */ 281 naddr int_net; /* working network # (host order)*/ 282 naddr int_mask; /* working net mask (host order) */ 283 naddr int_ripv1_mask; /* for inferring a mask (n) */ 284 naddr int_std_addr; /* class A/B/C address (n) */ 285 naddr int_std_net; /* class A/B/C network (h) */ 286 naddr int_std_mask; /* class A/B/C netmask (h) */ 287 int int_rip_sock; /* for queries */ 288 int int_if_flags; /* some bits copied from kernel */ 289 u_int int_state; 290 time_t int_act_time; /* last thought healthy */ 291 time_t int_query_time; 292 u_short int_transitions; /* times gone up-down */ 293 char int_metric; 294 char int_d_metric; /* for faked default route */ 295 struct int_data { 296 u_int ipackets; /* previous network stats */ 297 u_int ierrors; 298 u_int opackets; 299 u_int oerrors; 300 #ifdef sgi 301 u_int odrops; 302 #endif 303 time_t ts; /* timestamp on network stats */ 304 } int_data; 305 # define MAX_AUTH_KEYS 5 306 struct auth { /* authentication info */ 307 u_int16_t type; 308 u_char key[RIP_AUTH_PW_LEN]; 309 u_char keyid; 310 time_t start, end; 311 } int_auth[MAX_AUTH_KEYS]; 312 /* router discovery parameters */ 313 int int_rdisc_pref; /* signed preference to advertise */ 314 int int_rdisc_int; /* MaxAdvertiseInterval */ 315 int int_rdisc_cnt; 316 struct timeval int_rdisc_timer; 317 }; 318 319 /* bits in int_state */ 320 #define IS_ALIAS 0x0000001 /* interface alias */ 321 #define IS_SUBNET 0x0000002 /* interface on subnetted network */ 322 #define IS_REMOTE 0x0000004 /* interface is not on this machine */ 323 #define IS_PASSIVE 0x0000008 /* remote and does not do RIP */ 324 #define IS_EXTERNAL 0x0000010 /* handled by EGP or something */ 325 #define IS_CHECKED 0x0000020 /* still exists */ 326 #define IS_ALL_HOSTS 0x0000040 /* in INADDR_ALLHOSTS_GROUP */ 327 #define IS_ALL_ROUTERS 0x0000080 /* in INADDR_ALLROUTERS_GROUP */ 328 #define IS_DISTRUST 0x0000100 /* ignore untrusted routers */ 329 #define IS_REDIRECT_OK 0x0000200 /* accept ICMP redirects */ 330 #define IS_BROKE 0x0000400 /* seems to be broken */ 331 #define IS_SICK 0x0000800 /* seems to be broken */ 332 #define IS_DUP 0x0001000 /* has a duplicate address */ 333 #define IS_NEED_NET_SYN 0x0002000 /* need RS_NET_SYN route */ 334 #define IS_NO_AG 0x0004000 /* do not aggregate subnets */ 335 #define IS_NO_SUPER_AG 0x0008000 /* do not aggregate networks */ 336 #define IS_NO_RIPV1_IN 0x0010000 /* no RIPv1 input at all */ 337 #define IS_NO_RIPV2_IN 0x0020000 /* no RIPv2 input at all */ 338 #define IS_NO_RIP_IN (IS_NO_RIPV1_IN | IS_NO_RIPV2_IN) 339 #define IS_RIP_IN_OFF(s) (((s) & IS_NO_RIP_IN) == IS_NO_RIP_IN) 340 #define IS_NO_RIPV1_OUT 0x0040000 /* no RIPv1 output at all */ 341 #define IS_NO_RIPV2_OUT 0x0080000 /* no RIPv2 output at all */ 342 #define IS_NO_RIP_OUT (IS_NO_RIPV1_OUT | IS_NO_RIPV2_OUT) 343 #define IS_NO_RIP (IS_NO_RIP_OUT | IS_NO_RIP_IN) 344 #define IS_RIP_OUT_OFF(s) (((s) & IS_NO_RIP_OUT) == IS_NO_RIP_OUT) 345 #define IS_RIP_OFF(s) (((s) & IS_NO_RIP) == IS_NO_RIP) 346 #define IS_NO_RIP_MCAST 0x0100000 /* broadcast RIPv2 */ 347 #define IS_NO_ADV_IN 0x0200000 /* do not listen to advertisements */ 348 #define IS_NO_SOL_OUT 0x0400000 /* send no solicitations */ 349 #define IS_SOL_OUT 0x0800000 /* send solicitations */ 350 #define GROUP_IS_SOL_OUT (IS_SOL_OUT | IS_NO_SOL_OUT) 351 #define IS_NO_ADV_OUT 0x1000000 /* do not advertise rdisc */ 352 #define IS_ADV_OUT 0x2000000 /* advertise rdisc */ 353 #define GROUP_IS_ADV_OUT (IS_NO_ADV_OUT | IS_ADV_OUT) 354 #define IS_BCAST_RDISC 0x4000000 /* broadcast instead of multicast */ 355 #define IS_NO_RDISC (IS_NO_ADV_IN | IS_NO_SOL_OUT | IS_NO_ADV_OUT) 356 #define IS_PM_RDISC 0x8000000 /* poor-man's router discovery */ 357 358 #define iff_up(f) ((f) & IFF_UP) 359 360 361 /* Information for aggregating routes */ 362 #define NUM_AG_SLOTS 32 363 struct ag_info { 364 struct ag_info *ag_fine; /* slot with finer netmask */ 365 struct ag_info *ag_cors; /* more coarse netmask */ 366 naddr ag_dst_h; /* destination in host byte order */ 367 naddr ag_mask; 368 naddr ag_gate; 369 naddr ag_nhop; 370 char ag_metric; /* metric to be advertised */ 371 char ag_pref; /* aggregate based on this */ 372 u_int ag_seqno; 373 u_short ag_tag; 374 u_short ag_state; 375 #define AGS_SUPPRESS 0x001 /* combine with coarser mask */ 376 #define AGS_AGGREGATE 0x002 /* synthesize combined routes */ 377 #define AGS_REDUN0 0x004 /* redundant, finer routes output */ 378 #define AGS_REDUN1 0x008 379 #define AG_IS_REDUN(state) (((state) & (AGS_REDUN0 | AGS_REDUN1)) \ 380 == (AGS_REDUN0 | AGS_REDUN1)) 381 #define AGS_GATEWAY 0x010 /* tell kernel RTF_GATEWAY */ 382 #define AGS_IF 0x020 /* for an interface */ 383 #define AGS_RIPV2 0x040 /* send only as RIPv2 */ 384 #define AGS_FINE_GATE 0x080 /* ignore differing ag_gate when this 385 * has the finer netmask */ 386 #define AGS_CORS_GATE 0x100 /* ignore differing gate when this 387 * has the coarser netmasks */ 388 #define AGS_SPLIT_HZ 0x200 /* suppress for split horizon */ 389 390 /* some bits are set if they are set on either route */ 391 #define AGS_AGGREGATE_EITHER (AGS_RIPV2 | AGS_GATEWAY | \ 392 AGS_SUPPRESS | AGS_CORS_GATE) 393 }; 394 395 396 /* parameters for interfaces */ 397 extern struct parm { 398 struct parm *parm_next; 399 char parm_name[IF_NAME_LEN+1]; 400 naddr parm_net; 401 naddr parm_mask; 402 403 char parm_d_metric; 404 u_int parm_int_state; 405 int parm_rdisc_pref; /* signed IRDP preference */ 406 int parm_rdisc_int; /* IRDP advertising interval */ 407 struct auth parm_auth[MAX_AUTH_KEYS]; 408 } *parms; 409 410 /* authority for internal networks */ 411 extern struct intnet { 412 struct intnet *intnet_next; 413 naddr intnet_addr; /* network byte order */ 414 naddr intnet_mask; 415 char intnet_metric; 416 } *intnets; 417 418 /* defined RIPv1 netmasks */ 419 extern struct r1net { 420 struct r1net *r1net_next; 421 naddr r1net_net; /* host order */ 422 naddr r1net_match; 423 naddr r1net_mask; 424 } *r1nets; 425 426 /* trusted routers */ 427 extern struct tgate { 428 struct tgate *tgate_next; 429 naddr tgate_addr; 430 #define MAX_TGATE_NETS 32 431 struct tgate_net { 432 naddr net; /* host order */ 433 naddr mask; 434 } tgate_nets[MAX_TGATE_NETS]; 435 } *tgates; 436 437 enum output_type {OUT_QUERY, OUT_UNICAST, OUT_BROADCAST, OUT_MULTICAST, 438 NO_OUT_MULTICAST, NO_OUT_RIPV2}; 439 440 /* common output buffers */ 441 extern struct ws_buf { 442 struct rip *buf; 443 struct netinfo *n; 444 struct netinfo *base; 445 struct netinfo *lim; 446 enum output_type type; 447 } v12buf, v2buf; 448 449 extern pid_t mypid; 450 extern naddr myaddr; /* main address of this system */ 451 452 extern int stopint; /* !=0 to stop */ 453 454 extern int sock_max; 455 extern int rip_sock; /* RIP socket */ 456 extern struct interface *rip_sock_mcast; /* current multicast interface */ 457 extern int rt_sock; /* routing socket */ 458 extern int rt_sock_seqno; 459 extern int rdisc_sock; /* router-discovery raw socket */ 460 461 extern int seqno; /* sequence number for messages */ 462 extern int supplier; /* process should supply updates */ 463 extern int supplier_set; /* -s or -q requested */ 464 extern int lookforinterfaces; /* 1=probe for new up interfaces */ 465 extern int ridhosts; /* 1=reduce host routes */ 466 extern int mhome; /* 1=want multi-homed host route */ 467 extern int advertise_mhome; /* 1=must continue advertising it */ 468 extern int auth_ok; /* 1=ignore auth if we do not care */ 469 470 extern struct timeval clk; /* system clock's idea of time */ 471 extern struct timeval epoch; /* system clock when started */ 472 extern struct timeval now; /* current idea of time */ 473 extern time_t now_stale; 474 extern time_t now_expire; 475 extern time_t now_garbage; 476 477 extern struct timeval next_bcast; /* next general broadcast */ 478 extern struct timeval age_timer; /* next check of old routes */ 479 extern struct timeval no_flash; /* inhibit flash update until then */ 480 extern struct timeval rdisc_timer; /* next advert. or solicitation */ 481 extern int rdisc_ok; /* using solicited route */ 482 483 extern struct timeval ifinit_timer; /* time to check interfaces */ 484 485 extern naddr loopaddr; /* our address on loopback */ 486 extern int tot_interfaces; /* # of remote and local interfaces */ 487 extern int rip_interfaces; /* # of interfaces doing RIP */ 488 extern struct interface *ifnet; /* all interfaces */ 489 extern struct interface *remote_if; /* remote interfaces */ 490 extern int have_ripv1_out; /* have a RIPv1 interface */ 491 extern int have_ripv1_in; 492 extern int need_flash; /* flash update needed */ 493 extern struct timeval need_kern; /* need to update kernel table */ 494 extern u_int update_seqno; /* a route has changed */ 495 496 extern int tracelevel, new_tracelevel; 497 #define MAX_TRACELEVEL 4 498 #define TRACEKERNEL (tracelevel >= 4) /* log kernel changes */ 499 #define TRACECONTENTS (tracelevel >= 3) /* display packet contents */ 500 #define TRACEPACKETS (tracelevel >= 2) /* note packets */ 501 #define TRACEACTIONS (tracelevel != 0) 502 extern FILE *ftrace; /* output trace file */ 503 extern char inittracename[MAXPATHLEN+1]; 504 505 extern struct radix_node_head *rhead; 506 507 508 #ifdef sgi 509 /* Fix conflicts */ 510 #define dup2(x,y) BSDdup2(x,y) 511 #endif /* sgi */ 512 513 extern void fix_sock(int, const char *); 514 extern void fix_select(void); 515 extern void rip_off(void); 516 extern void rip_on(struct interface *); 517 518 extern void bufinit(void); 519 extern int output(enum output_type, struct sockaddr_in *, 520 struct interface *, struct rip *, int); 521 extern void clr_ws_buf(struct ws_buf *, struct auth *); 522 extern void rip_query(void); 523 extern void rip_bcast(int); 524 extern void supply(struct sockaddr_in *, struct interface *, 525 enum output_type, int, int, int); 526 527 extern void msglog(const char *, ...) PATTRIB(1,2); 528 struct msg_limit { 529 time_t reuse; 530 struct msg_sub { 531 naddr addr; 532 time_t until; 533 # define MSG_SUBJECT_N 8 534 } subs[MSG_SUBJECT_N]; 535 }; 536 extern void msglim(struct msg_limit *, naddr, 537 const char *, ...) PATTRIB(3,4); 538 #define LOGERR(msg) msglog(msg ": %s", strerror(errno)) 539 extern void logbad(int, const char *, ...) PATTRIB(2,3); 540 #define BADERR(dump,msg) logbad(dump,msg ": %s", strerror(errno)) 541 #ifdef DEBUG 542 #define DBGERR(dump,msg) BADERR(dump,msg) 543 #else 544 #define DBGERR(dump,msg) LOGERR(msg) 545 #endif 546 extern char *naddr_ntoa(naddr); 547 extern const char *saddr_ntoa(struct sockaddr *); 548 549 extern void *rtmalloc(size_t, const char *); 550 extern void timevaladd(struct timeval *, struct timeval *); 551 extern void intvl_random(struct timeval *, u_long, u_long); 552 extern int getnet(char *, naddr *, naddr *); 553 extern int gethost(char *, naddr *); 554 extern void gwkludge(void); 555 extern const char *parse_parms(char *, int); 556 extern const char *check_parms(struct parm *); 557 extern void get_parms(struct interface *); 558 559 extern void lastlog(void); 560 extern void trace_close(int); 561 extern void set_tracefile(const char *, const char *, int); 562 extern void tracelevel_msg(const char *, int); 563 extern void trace_off(const char*, ...) PATTRIB(1,2); 564 extern void set_tracelevel(void); 565 extern void trace_flush(void); 566 extern void trace_misc(const char *, ...) PATTRIB(1,2); 567 extern void trace_act(const char *, ...) PATTRIB(1,2); 568 extern void trace_pkt(const char *, ...) PATTRIB(1,2); 569 extern void trace_add_del(const char *, struct rt_entry *); 570 extern void trace_change(struct rt_entry *, u_int, struct rt_spare *, 571 const char *); 572 extern void trace_if(const char *, struct interface *); 573 extern void trace_upslot(struct rt_entry *, struct rt_spare *, 574 struct rt_spare *); 575 extern void trace_rip(const char*, const char*, struct sockaddr_in *, 576 struct interface *, struct rip *, int); 577 extern char *addrname(naddr, naddr, int); 578 extern char *rtname(naddr, naddr, naddr); 579 580 extern void rdisc_age(naddr); 581 extern void set_rdisc_mg(struct interface *, int); 582 extern void set_supplier(void); 583 extern void if_bad_rdisc(struct interface *); 584 extern void if_ok_rdisc(struct interface *); 585 extern void read_rip(int, struct interface *); 586 extern void read_rt(void); 587 extern void read_d(void); 588 extern void rdisc_adv(void); 589 extern void rdisc_sol(void); 590 591 extern void sigalrm(int); 592 extern void sigterm(int); 593 594 extern void sigtrace_on(int); 595 extern void sigtrace_off(int); 596 597 extern void flush_kern(void); 598 extern void age(naddr); 599 600 extern void ag_flush(naddr, naddr, void (*)(struct ag_info *)); 601 extern void ag_check(naddr, naddr, naddr, naddr, char, char, u_int, 602 u_short, u_short, void (*)(struct ag_info *)); 603 extern void del_static(naddr, naddr, naddr, int); 604 extern void del_redirects(naddr, time_t); 605 extern struct rt_entry *rtget(naddr, naddr); 606 extern struct rt_entry *rtfind(naddr); 607 extern void rtinit(void); 608 extern void rtadd(naddr, naddr, u_int, struct rt_spare *); 609 extern void rtchange(struct rt_entry *, u_int, struct rt_spare *, char *); 610 extern void rtdelete(struct rt_entry *); 611 extern void rts_delete(struct rt_entry *, struct rt_spare *); 612 extern void rtbad_sub(struct rt_entry *); 613 extern void rtswitch(struct rt_entry *, struct rt_spare *); 614 extern void rtbad(struct rt_entry *); 615 616 #define S_ADDR(x) (((struct sockaddr_in *)(x))->sin_addr.s_addr) 617 #define INFO_DST(I) ((I)->rti_info[RTAX_DST]) 618 #define INFO_GATE(I) ((I)->rti_info[RTAX_GATEWAY]) 619 #define INFO_MASK(I) ((I)->rti_info[RTAX_NETMASK]) 620 #define INFO_IFA(I) ((I)->rti_info[RTAX_IFA]) 621 #define INFO_IFP(I) ((I)->rti_info[RTAX_IFP]) 622 #define INFO_AUTHOR(I) ((I)->rti_info[RTAX_AUTHOR]) 623 #define INFO_BRD(I) ((I)->rti_info[RTAX_BRD]) 624 void rt_xaddrs(struct rt_addrinfo *, struct sockaddr *, struct sockaddr *, 625 int); 626 627 extern naddr std_mask(naddr); 628 extern naddr ripv1_mask_net(naddr, struct interface *); 629 extern naddr ripv1_mask_host(naddr,struct interface *); 630 #define on_net(a,net,mask) (((ntohl(a) ^ (net)) & (mask)) == 0) 631 extern int check_dst(naddr); 632 extern struct interface *check_dup(naddr, naddr, naddr, int); 633 extern int check_remote(struct interface *); 634 extern int addrouteforif(struct interface *); 635 extern void ifinit(void); 636 extern int walk_bad(struct radix_node *, struct walkarg *); 637 extern int if_ok(struct interface *, const char *); 638 extern void if_sick(struct interface *); 639 extern void if_bad(struct interface *); 640 extern void if_link(struct interface *); 641 extern struct interface *ifwithaddr(naddr, int, int); 642 extern struct interface *ifwithname(char *, naddr); 643 extern struct interface *ifwithindex(u_short, int); 644 extern struct interface *iflookup(naddr); 645 646 extern struct auth *find_auth(struct interface *); 647 extern void end_md5_auth(struct ws_buf *, struct auth *); 648 649 #define MD5_DIGEST_LEN 16 650 typedef struct { 651 u_int32_t state[4]; /* state (ABCD) */ 652 u_int32_t count[2]; /* # of bits, modulo 2^64 (LSB 1st) */ 653 unsigned char buffer[64]; /* input buffer */ 654 } MD5_CTX; 655 extern void MD5Init(MD5_CTX*); 656 extern void MD5Update(MD5_CTX*, u_char*, u_int); 657 extern void MD5Final(u_char[MD5_DIGEST_LEN], MD5_CTX*); 658