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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)defs.h 8.1 (Berkeley) 6/5/93 30 * 31 * $FreeBSD$ 32 */ 33 34 #ifdef sgi 35 #ident "$FreeBSD$" 36 #endif 37 38 /* Definitions for RIPv2 routing process. 39 * 40 * This code is based on the 4.4BSD `routed` daemon, with extensions to 41 * support: 42 * RIPv2, including variable length subnet masks. 43 * Router Discovery 44 * aggregate routes in the kernel tables. 45 * aggregate advertised routes. 46 * maintain spare routes for faster selection of another gateway 47 * when the current gateway dies. 48 * timers on routes with second granularity so that selection 49 * of a new route does not wait 30-60 seconds. 50 * tolerance of static routes. 51 * tell the kernel hop counts 52 * do not advertise if ipforwarding=0 53 * 54 * The vestigial support for other protocols has been removed. There 55 * is no likelihood that IETF RIPv1 or RIPv2 will ever be used with 56 * other protocols. The result is far smaller, faster, cleaner, and 57 * perhaps understandable. 58 * 59 * The accumulation of special flags and kludges added over the many 60 * years have been simplified and integrated. 61 */ 62 63 #include <stdio.h> 64 #include <netdb.h> 65 #include <stdlib.h> 66 #include <unistd.h> 67 #include <errno.h> 68 #include <string.h> 69 #ifdef sgi 70 #include <strings.h> 71 #include <bstring.h> 72 #endif 73 #include <stdarg.h> 74 #include <syslog.h> 75 #include <time.h> 76 #include <sys/cdefs.h> 77 #include <sys/time.h> 78 #include <sys/types.h> 79 #include <sys/param.h> 80 #include <sys/ioctl.h> 81 #include <sys/sysctl.h> 82 #include <sys/socket.h> 83 #ifdef sgi 84 #define _USER_ROUTE_TREE 85 #include <net/radix.h> 86 #else 87 #include "radix.h" 88 #define UNUSED __attribute__((unused)) 89 #define PATTRIB(f,l) __attribute__((format (printf,f,l))) 90 #endif 91 #include <net/if.h> 92 #include <net/route.h> 93 #include <net/if_dl.h> 94 #include <netinet/in.h> 95 #include <arpa/inet.h> 96 #define RIPVERSION RIPv2 97 #include <protocols/routed.h> 98 99 #ifndef __RCSID 100 #define __RCSID(_s) static const char rcsid[] UNUSED = _s 101 #endif 102 #ifndef __COPYRIGHT 103 #define __COPYRIGHT(_s) static const char copyright[] UNUSED = _s 104 #endif 105 106 /* Type of an IP address. 107 * Some systems do not like to pass structures, so do not use in_addr. 108 * Some systems think a long has 64 bits, which would be a gross waste. 109 * So define it here so it can be changed for the target system. 110 * It should be defined somewhere netinet/in.h, but it is not. 111 */ 112 #ifdef sgi 113 #define naddr u_int32_t 114 #elif defined (__NetBSD__) 115 #define naddr u_int32_t 116 #define _HAVE_SA_LEN 117 #define _HAVE_SIN_LEN 118 #else 119 #define naddr u_long 120 #define _HAVE_SA_LEN 121 #define _HAVE_SIN_LEN 122 #endif 123 124 /* Turn on if IP_{ADD,DROP}_MEMBERSHIP and IP_MULTICAST_IF considers address 125 * within 0.0.0.0/8 as interface index. 126 */ 127 #ifdef __FreeBSD__ 128 #define MCAST_IFINDEX 129 #endif 130 131 /* Turn on if IP_DROP_MEMBERSHIP and IP_ADD_MEMBERSHIP do not look at 132 * the dstaddr of point-to-point interfaces. 133 * #define MCAST_PPP_BUG 134 */ 135 #ifdef MCAST_IFINDEX 136 #undef MCAST_PPP_BUG 137 #endif 138 139 #define DAY (24*60*60) 140 #define NEVER DAY /* a long time */ 141 #define EPOCH NEVER /* bias time by this to avoid <0 */ 142 143 /* Scan the kernel regularly to see if any interfaces have appeared or been 144 * turned off. These must be less than STALE_TIME. 145 */ 146 #define CHECK_BAD_INTERVAL 5 /* when an interface is known bad */ 147 #define CHECK_ACT_INTERVAL 30 /* when advertising */ 148 #define CHECK_QUIET_INTERVAL 300 /* when not */ 149 150 #define LIM_SEC(s,l) ((s).tv_sec = MIN((s).tv_sec, (l))) 151 152 /* Metric used for fake default routes. It ought to be 15, but when 153 * processing advertised routes, previous versions of `routed` added 154 * to the received metric and discarded the route if the total was 16 155 * or larger. 156 */ 157 #define FAKE_METRIC (HOPCNT_INFINITY-2) 158 159 160 /* Router Discovery parameters */ 161 #ifndef sgi 162 #define INADDR_ALLROUTERS_GROUP 0xe0000002 /* 224.0.0.2 */ 163 #endif 164 #define MaxMaxAdvertiseInterval 1800 165 #define MinMaxAdvertiseInterval 4 166 #define DefMaxAdvertiseInterval 600 167 #define DEF_PreferenceLevel 0 168 #define MIN_PreferenceLevel 0x80000000 169 170 #define MAX_INITIAL_ADVERT_INTERVAL 16 171 #define MAX_INITIAL_ADVERTS 3 172 #define MAX_RESPONSE_DELAY 2 173 174 #define MAX_SOLICITATION_DELAY 1 175 #define SOLICITATION_INTERVAL 3 176 #define MAX_SOLICITATIONS 3 177 178 179 /* Bloated packet size for systems that simply add authentication to 180 * full-sized packets 181 */ 182 #define OVER_MAXPACKETSIZE (MAXPACKETSIZE+sizeof(struct netinfo)*2) 183 /* typical packet buffers */ 184 union pkt_buf { 185 char packet[OVER_MAXPACKETSIZE*2]; 186 struct rip rip; 187 }; 188 189 #define GNAME_LEN 64 /* assumed=64 in parms.c */ 190 /* bigger than IFNAMSIZ, with room for "external()" or "remote()" */ 191 #define IF_NAME_LEN (GNAME_LEN+15) 192 193 /* No more routes than this, to protect ourself in case something goes 194 * whacko and starts broadcasting zillions of bogus routes. 195 */ 196 #define MAX_ROUTES (128*1024) 197 extern int total_routes; 198 199 /* Main, daemon routing table structure 200 */ 201 struct rt_entry { 202 struct radix_node rt_nodes[2]; /* radix tree glue */ 203 u_int rt_state; 204 # define RS_IF 0x001 /* for network interface */ 205 # define RS_NET_INT 0x002 /* authority route */ 206 # define RS_NET_SYN 0x004 /* fake net route for subnet */ 207 # define RS_NO_NET_SYN (RS_LOCAL | RS_LOCAL | RS_IF) 208 # define RS_SUBNET 0x008 /* subnet route from any source */ 209 # define RS_LOCAL 0x010 /* loopback for pt-to-pt */ 210 # define RS_MHOME 0x020 /* from -m */ 211 # define RS_STATIC 0x040 /* from the kernel */ 212 # define RS_RDISC 0x080 /* from router discovery */ 213 struct sockaddr_in rt_dst_sock; 214 naddr rt_mask; 215 struct rt_spare { 216 struct interface *rts_ifp; 217 naddr rts_gate; /* forward packets here */ 218 naddr rts_router; /* on the authority of this router */ 219 char rts_metric; 220 u_short rts_tag; 221 time_t rts_time; /* timer to junk stale routes */ 222 u_int rts_de_ag; /* de-aggregation level */ 223 #define NUM_SPARES 4 224 } rt_spares[NUM_SPARES]; 225 u_int rt_seqno; /* when last changed */ 226 char rt_poison_metric; /* to notice maximum recently */ 227 time_t rt_poison_time; /* advertised metric */ 228 }; 229 #define rt_dst rt_dst_sock.sin_addr.s_addr 230 #define rt_ifp rt_spares[0].rts_ifp 231 #define rt_gate rt_spares[0].rts_gate 232 #define rt_router rt_spares[0].rts_router 233 #define rt_metric rt_spares[0].rts_metric 234 #define rt_tag rt_spares[0].rts_tag 235 #define rt_time rt_spares[0].rts_time 236 #define rt_de_ag rt_spares[0].rts_de_ag 237 238 #define HOST_MASK 0xffffffff 239 #define RT_ISHOST(rt) ((rt)->rt_mask == HOST_MASK) 240 241 /* age all routes that 242 * are not from -g, -m, or static routes from the kernel 243 * not unbroken interface routes 244 * but not broken interfaces 245 * nor non-passive, remote interfaces that are not aliases 246 * (i.e. remote & metric=0) 247 */ 248 #define AGE_RT(rt_state,ifp) (0 == ((rt_state) & (RS_MHOME | RS_STATIC \ 249 | RS_NET_SYN | RS_RDISC)) \ 250 && (!((rt_state) & RS_IF) \ 251 || (ifp) == 0 \ 252 || (((ifp)->int_state & IS_REMOTE) \ 253 && !((ifp)->int_state & IS_PASSIVE)))) 254 255 /* true if A is better than B 256 * Better if 257 * - A is not a poisoned route 258 * - and A is not stale 259 * - and A has a shorter path 260 * - or is the router speaking for itself 261 * - or the current route is equal but stale 262 * - or it is a host route advertised by a system for itself 263 */ 264 #define BETTER_LINK(rt,A,B) ((A)->rts_metric < HOPCNT_INFINITY \ 265 && now_stale <= (A)->rts_time \ 266 && ((A)->rts_metric < (B)->rts_metric \ 267 || ((A)->rts_gate == (A)->rts_router \ 268 && (B)->rts_gate != (B)->rts_router) \ 269 || ((A)->rts_metric == (B)->rts_metric \ 270 && now_stale > (B)->rts_time) \ 271 || (RT_ISHOST(rt) \ 272 && (rt)->rt_dst == (A)->rts_router \ 273 && (A)->rts_metric == (B)->rts_metric))) 274 275 276 /* An "interface" is similar to a kernel ifnet structure, except it also 277 * handles "logical" or "IS_REMOTE" interfaces (remote gateways). 278 */ 279 struct interface { 280 struct interface *int_next, **int_prev; 281 struct interface *int_ahash, **int_ahash_prev; 282 struct interface *int_bhash, **int_bhash_prev; 283 struct interface *int_rlink, **int_rlink_prev; 284 struct interface *int_nhash, **int_nhash_prev; 285 char int_name[IF_NAME_LEN+1]; 286 u_short int_index; 287 naddr int_addr; /* address on this host (net order) */ 288 naddr int_brdaddr; /* broadcast address (n) */ 289 naddr int_dstaddr; /* other end of pt-to-pt link (n) */ 290 naddr int_net; /* working network # (host order)*/ 291 naddr int_mask; /* working net mask (host order) */ 292 naddr int_ripv1_mask; /* for inferring a mask (n) */ 293 naddr int_std_addr; /* class A/B/C address (n) */ 294 naddr int_std_net; /* class A/B/C network (h) */ 295 naddr int_std_mask; /* class A/B/C netmask (h) */ 296 int int_rip_sock; /* for queries */ 297 int int_if_flags; /* some bits copied from kernel */ 298 u_int int_state; 299 time_t int_act_time; /* last thought healthy */ 300 time_t int_query_time; 301 u_short int_transitions; /* times gone up-down */ 302 char int_metric; 303 u_char int_d_metric; /* for faked default route */ 304 u_char int_adj_inmetric; /* adjust advertised metrics */ 305 u_char int_adj_outmetric; /* instead of interface metric */ 306 struct int_data { 307 u_int ipackets; /* previous network stats */ 308 u_int ierrors; 309 u_int opackets; 310 u_int oerrors; 311 #ifdef sgi 312 u_int odrops; 313 #endif 314 time_t ts; /* timestamp on network stats */ 315 } int_data; 316 # define MAX_AUTH_KEYS 5 317 struct auth { /* authentication info */ 318 u_int16_t type; 319 u_char key[RIP_AUTH_PW_LEN]; 320 u_char keyid; 321 time_t start, end; 322 } int_auth[MAX_AUTH_KEYS]; 323 /* router discovery parameters */ 324 int int_rdisc_pref; /* signed preference to advertise */ 325 int int_rdisc_int; /* MaxAdvertiseInterval */ 326 int int_rdisc_cnt; 327 struct timeval int_rdisc_timer; 328 }; 329 330 /* bits in int_state */ 331 #define IS_ALIAS 0x0000001 /* interface alias */ 332 #define IS_SUBNET 0x0000002 /* interface on subnetted network */ 333 #define IS_REMOTE 0x0000004 /* interface is not on this machine */ 334 #define IS_PASSIVE 0x0000008 /* remote and does not do RIP */ 335 #define IS_EXTERNAL 0x0000010 /* handled by EGP or something */ 336 #define IS_CHECKED 0x0000020 /* still exists */ 337 #define IS_ALL_HOSTS 0x0000040 /* in INADDR_ALLHOSTS_GROUP */ 338 #define IS_ALL_ROUTERS 0x0000080 /* in INADDR_ALLROUTERS_GROUP */ 339 #define IS_DISTRUST 0x0000100 /* ignore untrusted routers */ 340 #define IS_REDIRECT_OK 0x0000200 /* accept ICMP redirects */ 341 #define IS_BROKE 0x0000400 /* seems to be broken */ 342 #define IS_SICK 0x0000800 /* seems to be broken */ 343 #define IS_DUP 0x0001000 /* has a duplicate address */ 344 #define IS_NEED_NET_SYN 0x0002000 /* need RS_NET_SYN route */ 345 #define IS_NO_AG 0x0004000 /* do not aggregate subnets */ 346 #define IS_NO_SUPER_AG 0x0008000 /* do not aggregate networks */ 347 #define IS_NO_RIPV1_IN 0x0010000 /* no RIPv1 input at all */ 348 #define IS_NO_RIPV2_IN 0x0020000 /* no RIPv2 input at all */ 349 #define IS_NO_RIP_IN (IS_NO_RIPV1_IN | IS_NO_RIPV2_IN) 350 #define IS_RIP_IN_OFF(s) (((s) & IS_NO_RIP_IN) == IS_NO_RIP_IN) 351 #define IS_NO_RIPV1_OUT 0x0040000 /* no RIPv1 output at all */ 352 #define IS_NO_RIPV2_OUT 0x0080000 /* no RIPv2 output at all */ 353 #define IS_NO_RIP_OUT (IS_NO_RIPV1_OUT | IS_NO_RIPV2_OUT) 354 #define IS_NO_RIP (IS_NO_RIP_OUT | IS_NO_RIP_IN) 355 #define IS_RIP_OUT_OFF(s) (((s) & IS_NO_RIP_OUT) == IS_NO_RIP_OUT) 356 #define IS_RIP_OFF(s) (((s) & IS_NO_RIP) == IS_NO_RIP) 357 #define IS_NO_RIP_MCAST 0x0100000 /* broadcast RIPv2 */ 358 #define IS_NO_ADV_IN 0x0200000 /* do not listen to advertisements */ 359 #define IS_NO_SOL_OUT 0x0400000 /* send no solicitations */ 360 #define IS_SOL_OUT 0x0800000 /* send solicitations */ 361 #define GROUP_IS_SOL_OUT (IS_SOL_OUT | IS_NO_SOL_OUT) 362 #define IS_NO_ADV_OUT 0x1000000 /* do not advertise rdisc */ 363 #define IS_ADV_OUT 0x2000000 /* advertise rdisc */ 364 #define GROUP_IS_ADV_OUT (IS_NO_ADV_OUT | IS_ADV_OUT) 365 #define IS_BCAST_RDISC 0x4000000 /* broadcast instead of multicast */ 366 #define IS_NO_RDISC (IS_NO_ADV_IN | IS_NO_SOL_OUT | IS_NO_ADV_OUT) 367 #define IS_PM_RDISC 0x8000000 /* poor-man's router discovery */ 368 369 #define iff_up(f) ((f) & IFF_UP) 370 371 372 /* Information for aggregating routes */ 373 #define NUM_AG_SLOTS 32 374 struct ag_info { 375 struct ag_info *ag_fine; /* slot with finer netmask */ 376 struct ag_info *ag_cors; /* more coarse netmask */ 377 naddr ag_dst_h; /* destination in host byte order */ 378 naddr ag_mask; 379 naddr ag_gate; 380 naddr ag_nhop; 381 char ag_metric; /* metric to be advertised */ 382 char ag_pref; /* aggregate based on this */ 383 u_int ag_seqno; 384 u_short ag_tag; 385 u_short ag_state; 386 #define AGS_SUPPRESS 0x001 /* combine with coarser mask */ 387 #define AGS_AGGREGATE 0x002 /* synthesize combined routes */ 388 #define AGS_REDUN0 0x004 /* redundant, finer routes output */ 389 #define AGS_REDUN1 0x008 390 #define AG_IS_REDUN(state) (((state) & (AGS_REDUN0 | AGS_REDUN1)) \ 391 == (AGS_REDUN0 | AGS_REDUN1)) 392 #define AGS_GATEWAY 0x010 /* tell kernel RTF_GATEWAY */ 393 #define AGS_IF 0x020 /* for an interface */ 394 #define AGS_RIPV2 0x040 /* send only as RIPv2 */ 395 #define AGS_FINE_GATE 0x080 /* ignore differing ag_gate when this 396 * has the finer netmask */ 397 #define AGS_CORS_GATE 0x100 /* ignore differing gate when this 398 * has the coarser netmasks */ 399 #define AGS_SPLIT_HZ 0x200 /* suppress for split horizon */ 400 401 /* some bits are set if they are set on either route */ 402 #define AGS_AGGREGATE_EITHER (AGS_RIPV2 | AGS_GATEWAY | \ 403 AGS_SUPPRESS | AGS_CORS_GATE) 404 }; 405 406 407 /* parameters for interfaces */ 408 extern struct parm { 409 struct parm *parm_next; 410 char parm_name[IF_NAME_LEN+1]; 411 naddr parm_net; 412 naddr parm_mask; 413 414 u_char parm_d_metric; 415 u_char parm_adj_inmetric; 416 char parm_adj_outmetric; 417 u_int parm_int_state; 418 int parm_rdisc_pref; /* signed IRDP preference */ 419 int parm_rdisc_int; /* IRDP advertising interval */ 420 struct auth parm_auth[MAX_AUTH_KEYS]; 421 } *parms; 422 423 /* authority for internal networks */ 424 extern struct intnet { 425 struct intnet *intnet_next; 426 naddr intnet_addr; /* network byte order */ 427 naddr intnet_mask; 428 char intnet_metric; 429 } *intnets; 430 431 /* defined RIPv1 netmasks */ 432 extern struct r1net { 433 struct r1net *r1net_next; 434 naddr r1net_net; /* host order */ 435 naddr r1net_match; 436 naddr r1net_mask; 437 } *r1nets; 438 439 /* trusted routers */ 440 extern struct tgate { 441 struct tgate *tgate_next; 442 naddr tgate_addr; 443 #define MAX_TGATE_NETS 32 444 struct tgate_net { 445 naddr net; /* host order */ 446 naddr mask; 447 } tgate_nets[MAX_TGATE_NETS]; 448 } *tgates; 449 450 enum output_type {OUT_QUERY, OUT_UNICAST, OUT_BROADCAST, OUT_MULTICAST, 451 NO_OUT_MULTICAST, NO_OUT_RIPV2}; 452 453 /* common output buffers */ 454 extern struct ws_buf { 455 struct rip *buf; 456 struct netinfo *n; 457 struct netinfo *base; 458 struct netinfo *lim; 459 enum output_type type; 460 } v12buf, v2buf; 461 462 extern pid_t mypid; 463 extern naddr myaddr; /* main address of this system */ 464 465 extern int stopint; /* !=0 to stop */ 466 467 extern int sock_max; 468 extern int rip_sock; /* RIP socket */ 469 extern struct interface *rip_sock_mcast; /* current multicast interface */ 470 extern int rt_sock; /* routing socket */ 471 extern int rt_sock_seqno; 472 extern int rdisc_sock; /* router-discovery raw socket */ 473 474 extern int seqno; /* sequence number for messages */ 475 extern int supplier; /* process should supply updates */ 476 extern int supplier_set; /* -s or -q requested */ 477 extern int lookforinterfaces; /* 1=probe for new up interfaces */ 478 extern int ridhosts; /* 1=reduce host routes */ 479 extern int mhome; /* 1=want multi-homed host route */ 480 extern int advertise_mhome; /* 1=must continue advertising it */ 481 extern int auth_ok; /* 1=ignore auth if we do not care */ 482 483 extern struct timeval clk; /* system clock's idea of time */ 484 extern struct timeval epoch; /* system clock when started */ 485 extern struct timeval now; /* current idea of time */ 486 extern time_t now_stale; 487 extern time_t now_expire; 488 extern time_t now_garbage; 489 490 extern struct timeval next_bcast; /* next general broadcast */ 491 extern struct timeval age_timer; /* next check of old routes */ 492 extern struct timeval no_flash; /* inhibit flash update until then */ 493 extern struct timeval rdisc_timer; /* next advert. or solicitation */ 494 extern int rdisc_ok; /* using solicited route */ 495 496 extern struct timeval ifinit_timer; /* time to check interfaces */ 497 498 extern naddr loopaddr; /* our address on loopback */ 499 extern int tot_interfaces; /* # of remote and local interfaces */ 500 extern int rip_interfaces; /* # of interfaces doing RIP */ 501 extern struct interface *ifnet; /* all interfaces */ 502 extern struct interface *remote_if; /* remote interfaces */ 503 extern int have_ripv1_out; /* have a RIPv1 interface */ 504 extern int have_ripv1_in; 505 extern int need_flash; /* flash update needed */ 506 extern struct timeval need_kern; /* need to update kernel table */ 507 extern u_int update_seqno; /* a route has changed */ 508 509 extern int tracelevel, new_tracelevel; 510 #define MAX_TRACELEVEL 4 511 #define TRACEKERNEL (tracelevel >= 4) /* log kernel changes */ 512 #define TRACECONTENTS (tracelevel >= 3) /* display packet contents */ 513 #define TRACEPACKETS (tracelevel >= 2) /* note packets */ 514 #define TRACEACTIONS (tracelevel != 0) 515 extern FILE *ftrace; /* output trace file */ 516 extern char inittracename[PATH_MAX]; 517 518 extern struct radix_node_head *rhead; 519 520 521 #ifdef sgi 522 /* Fix conflicts */ 523 #define dup2(x,y) BSDdup2(x,y) 524 #endif /* sgi */ 525 526 extern void fix_sock(int, const char *); 527 extern void fix_select(void); 528 extern void rip_off(void); 529 extern void rip_on(struct interface *); 530 531 extern void bufinit(void); 532 extern int output(enum output_type, struct sockaddr_in *, 533 struct interface *, struct rip *, int); 534 extern void clr_ws_buf(struct ws_buf *, struct auth *); 535 extern void rip_query(void); 536 extern void rip_bcast(int); 537 extern void supply(struct sockaddr_in *, struct interface *, 538 enum output_type, int, int, int); 539 540 extern void msglog(const char *, ...) PATTRIB(1,2); 541 struct msg_limit { 542 time_t reuse; 543 struct msg_sub { 544 naddr addr; 545 time_t until; 546 # define MSG_SUBJECT_N 8 547 } subs[MSG_SUBJECT_N]; 548 }; 549 extern void msglim(struct msg_limit *, naddr, 550 const char *, ...) PATTRIB(3,4); 551 #define LOGERR(msg) msglog(msg ": %s", strerror(errno)) 552 extern void logbad(int, const char *, ...) PATTRIB(2,3); 553 #define BADERR(dump,msg) logbad(dump,msg ": %s", strerror(errno)) 554 #ifdef DEBUG 555 #define DBGERR(dump,msg) BADERR(dump,msg) 556 #else 557 #define DBGERR(dump,msg) LOGERR(msg) 558 #endif 559 extern char *naddr_ntoa(naddr); 560 extern const char *saddr_ntoa(struct sockaddr *); 561 562 extern void *rtmalloc(size_t, const char *); 563 extern void timevaladd(struct timeval *, struct timeval *); 564 extern void intvl_random(struct timeval *, u_long, u_long); 565 extern int getnet(char *, naddr *, naddr *); 566 extern int gethost(char *, naddr *); 567 extern void gwkludge(void); 568 extern const char *parse_parms(char *, int); 569 extern const char *check_parms(struct parm *); 570 extern void get_parms(struct interface *); 571 572 extern void lastlog(void); 573 extern void trace_close(int); 574 extern void set_tracefile(const char *, const char *, int); 575 extern void tracelevel_msg(const char *, int); 576 extern void trace_off(const char*, ...) PATTRIB(1,2); 577 extern void set_tracelevel(void); 578 extern void trace_flush(void); 579 extern void trace_misc(const char *, ...) PATTRIB(1,2); 580 extern void trace_act(const char *, ...) PATTRIB(1,2); 581 extern void trace_pkt(const char *, ...) PATTRIB(1,2); 582 extern void trace_add_del(const char *, struct rt_entry *); 583 extern void trace_change(struct rt_entry *, u_int, struct rt_spare *, 584 const char *); 585 extern void trace_if(const char *, struct interface *); 586 extern void trace_upslot(struct rt_entry *, struct rt_spare *, 587 struct rt_spare *); 588 extern void trace_rip(const char*, const char*, struct sockaddr_in *, 589 struct interface *, struct rip *, int); 590 extern char *addrname(naddr, naddr, int); 591 extern char *rtname(naddr, naddr, naddr); 592 593 extern void rdisc_age(naddr); 594 extern void set_rdisc_mg(struct interface *, int); 595 extern void set_supplier(void); 596 extern void if_bad_rdisc(struct interface *); 597 extern void if_ok_rdisc(struct interface *); 598 extern void read_rip(int, struct interface *); 599 extern void read_rt(void); 600 extern void read_d(void); 601 extern void rdisc_adv(void); 602 extern void rdisc_sol(void); 603 604 extern void sigalrm(int); 605 extern void sigterm(int); 606 607 extern void sigtrace_on(int); 608 extern void sigtrace_off(int); 609 610 extern void flush_kern(void); 611 extern void age(naddr); 612 613 extern void ag_flush(naddr, naddr, void (*)(struct ag_info *)); 614 extern void ag_check(naddr, naddr, naddr, naddr, char, char, u_int, 615 u_short, u_short, void (*)(struct ag_info *)); 616 extern void del_static(naddr, naddr, naddr, int); 617 extern void del_redirects(naddr, time_t); 618 extern struct rt_entry *rtget(naddr, naddr); 619 extern struct rt_entry *rtfind(naddr); 620 extern void rtinit(void); 621 extern void rtadd(naddr, naddr, u_int, struct rt_spare *); 622 extern void rtchange(struct rt_entry *, u_int, struct rt_spare *, char *); 623 extern void rtdelete(struct rt_entry *); 624 extern void rts_delete(struct rt_entry *, struct rt_spare *); 625 extern void rtbad_sub(struct rt_entry *); 626 extern void rtswitch(struct rt_entry *, struct rt_spare *); 627 extern void rtbad(struct rt_entry *); 628 629 #define S_ADDR(x) (((struct sockaddr_in *)(x))->sin_addr.s_addr) 630 #define INFO_DST(I) ((I)->rti_info[RTAX_DST]) 631 #define INFO_GATE(I) ((I)->rti_info[RTAX_GATEWAY]) 632 #define INFO_MASK(I) ((I)->rti_info[RTAX_NETMASK]) 633 #define INFO_IFA(I) ((I)->rti_info[RTAX_IFA]) 634 #define INFO_IFP(I) ((I)->rti_info[RTAX_IFP]) 635 #define INFO_AUTHOR(I) ((I)->rti_info[RTAX_AUTHOR]) 636 #define INFO_BRD(I) ((I)->rti_info[RTAX_BRD]) 637 void rt_xaddrs(struct rt_addrinfo *, struct sockaddr *, struct sockaddr *, 638 int); 639 640 extern naddr std_mask(naddr); 641 extern naddr ripv1_mask_net(naddr, struct interface *); 642 extern naddr ripv1_mask_host(naddr,struct interface *); 643 #define on_net(a,net,mask) (((ntohl(a) ^ (net)) & (mask)) == 0) 644 extern int check_dst(naddr); 645 extern struct interface *check_dup(naddr, naddr, naddr, int); 646 extern int check_remote(struct interface *); 647 extern int addrouteforif(struct interface *); 648 extern void ifinit(void); 649 extern int walk_bad(struct radix_node *, struct walkarg *); 650 extern int if_ok(struct interface *, const char *); 651 extern void if_sick(struct interface *); 652 extern void if_bad(struct interface *); 653 extern void if_link(struct interface *); 654 extern struct interface *ifwithaddr(naddr, int, int); 655 extern struct interface *ifwithname(char *, naddr); 656 extern struct interface *ifwithindex(u_short, int); 657 extern struct interface *iflookup(naddr); 658 659 extern struct auth *find_auth(struct interface *); 660 extern void end_md5_auth(struct ws_buf *, struct auth *); 661 662 #if defined(__FreeBSD__) || defined(__NetBSD__) 663 #include <md5.h> 664 #else 665 #define MD5_DIGEST_LEN 16 666 typedef struct { 667 u_int32_t state[4]; /* state (ABCD) */ 668 u_int32_t count[2]; /* # of bits, modulo 2^64 (LSB 1st) */ 669 unsigned char buffer[64]; /* input buffer */ 670 } MD5_CTX; 671 extern void MD5Init(MD5_CTX*); 672 extern void MD5Update(MD5_CTX*, u_char*, u_int); 673 extern void MD5Final(u_char[MD5_DIGEST_LEN], MD5_CTX*); 674 #endif 675