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