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 acknowledgement: 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 * $Id$ 35 */ 36 37 #ifndef __NetBSD__ 38 #ident "$Revision: 1.1.1.1 $" 39 #endif 40 41 /* Definitions for RIPv2 routing process. 42 * 43 * This code is based on the 4.4BSD `routed` daemon, with extensions to 44 * support: 45 * RIPv2, including variable length subnet masks. 46 * Router Discovery 47 * aggregate routes in the kernel tables. 48 * aggregate advertised routes. 49 * maintain spare routes for faster selection of another gateway 50 * when the current gateway dies. 51 * timers on routes with second granularity so that selection 52 * of a new route does not wait 30-60 seconds. 53 * tolerance of static routes. 54 * tell the kernel hop counts 55 * do not advertise if ipforwarding=0 56 * 57 * The vestigual support for other protocols has been removed. There 58 * is no likelihood that IETF RIPv1 or RIPv2 will ever be used with 59 * other protocols. The result is far smaller, faster, cleaner, and 60 * perhaps understandable. 61 * 62 * The accumulation of special flags and kludges added over the many 63 * years have been simplified and integrated. 64 */ 65 66 #include <stdio.h> 67 #include <netdb.h> 68 #include <stdlib.h> 69 #include <unistd.h> 70 #include <errno.h> 71 #include <string.h> 72 #ifdef sgi 73 #include <strings.h> 74 #include <bstring.h> 75 #endif 76 #include <stdarg.h> 77 #include <syslog.h> 78 #include <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 #include <net/radix.h> 86 #else 87 #include "radix.h" 88 #endif 89 #include <net/if.h> 90 #include <net/route.h> 91 #include <net/if_dl.h> 92 #include <netinet/in.h> 93 #include <arpa/inet.h> 94 #define RIPVERSION RIPv2 95 #include <protocols/routed.h> 96 97 98 /* Type of an IP address. 99 * Some systems do not like to pass structures, so do not use in_addr. 100 * Some systems think a long has 64 bits, which would be a gross waste. 101 * So define it here so it can be changed for the target system. 102 * It should be defined somewhere netinet/in.h, but it is not. 103 */ 104 #ifdef sgi 105 #define naddr __uint32_t 106 #else 107 #ifdef __NetBSD__ 108 #define naddr u_int32_t 109 #else 110 #define naddr u_long 111 #endif 112 #define _HAVE_SA_LEN 113 #define _HAVE_SIN_LEN 114 #endif 115 116 /* Turn on if IP_DROP_MEMBERSHIP and IP_ADD_MEMBERSHIP do not look at 117 * the dstaddr of point-to-point interfaces. 118 */ 119 /* #define MCAST_PPP_BUG */ 120 121 #define NEVER (24*60*60) /* a long time */ 122 #define EPOCH NEVER /* bias time by this to avoid <0 */ 123 124 /* Scan the kernel regularly to see if any interfaces have appeared or been 125 * turned off. These must be less than STALE_TIME. 126 */ 127 #define CHECK_BAD_INTERVAL 5 /* when an interface is known bad */ 128 #define CHECK_ACT_INTERVAL 30 /* when advertising */ 129 #define CHECK_QUIET_INTERVAL 300 /* when not */ 130 131 #define LIM_SEC(s,l) ((s).tv_sec = MIN((s).tv_sec, (l))) 132 133 134 /* Router Discovery parameters */ 135 #ifndef sgi 136 #define INADDR_ALLROUTERS_GROUP 0xe0000002 /* 224.0.0.2 */ 137 #endif 138 #define MaxMaxAdvertiseInterval 1800 139 #define MinMaxAdvertiseInterval 4 140 #define DefMaxAdvertiseInterval 600 141 #define DEF_PreferenceLevel 0 142 #define MIN_PreferenceLevel 0x80000000 143 144 #define MAX_INITIAL_ADVERT_INTERVAL 16 145 #define MAX_INITIAL_ADVERTS 3 146 #define MAX_RESPONSE_DELAY 2 147 148 #define MAX_SOLICITATION_DELAY 1 149 #define SOLICITATION_INTERVAL 3 150 #define MAX_SOLICITATIONS 3 151 152 153 /* typical packet buffers */ 154 union pkt_buf { 155 char packet[MAXPACKETSIZE+1]; 156 struct rip rip; 157 }; 158 159 160 /* no more routes than this, to protect ourself in case something goes 161 * whacko and starts broadcast zillions of bogus routes. 162 */ 163 #define MAX_ROUTES (128*1024) 164 extern int total_routes; 165 166 /* Main, daemon routing table structure 167 */ 168 struct rt_entry { 169 struct radix_node rt_nodes[2]; /* radix tree glue */ 170 u_int rt_state; 171 # define RS_IF 0x001 /* for network interface */ 172 # define RS_NET_INT 0x002 /* authority route */ 173 # define RS_NET_SYN 0x004 /* fake net route for subnet */ 174 # define RS_NO_NET_SYN (RS_LOCAL | RS_LOCAL | RS_IF) 175 # define RS_SUBNET 0x008 /* subnet route from any source */ 176 # define RS_LOCAL 0x010 /* loopback for pt-to-pt */ 177 # define RS_MHOME 0x020 /* from -m */ 178 # define RS_STATIC 0x040 /* from the kernel */ 179 # define RS_RDISC 0x080 /* from router discovery */ 180 struct sockaddr_in rt_dst_sock; 181 naddr rt_mask; 182 struct rt_spare { 183 struct interface *rts_ifp; 184 naddr rts_gate; /* forward packets here */ 185 naddr rts_router; /* on the authority of this router */ 186 char rts_metric; 187 u_short rts_tag; 188 time_t rts_time; /* timer to junk stale routes */ 189 #define NUM_SPARES 4 190 } rt_spares[NUM_SPARES]; 191 u_int rt_seqno; /* when last changed */ 192 char rt_poison_metric; /* to notice maximum recently */ 193 time_t rt_poison_time; /* advertised metric */ 194 }; 195 #define rt_dst rt_dst_sock.sin_addr.s_addr 196 #define rt_ifp rt_spares[0].rts_ifp 197 #define rt_gate rt_spares[0].rts_gate 198 #define rt_router rt_spares[0].rts_router 199 #define rt_metric rt_spares[0].rts_metric 200 #define rt_tag rt_spares[0].rts_tag 201 #define rt_time rt_spares[0].rts_time 202 203 #define HOST_MASK 0xffffffff 204 #define RT_ISHOST(rt) ((rt)->rt_mask == HOST_MASK) 205 206 /* age all routes that 207 * are not from -g, -m, or static routes from the kernel 208 * not unbroken interface routes 209 * but not broken interfaces 210 * nor non-passive, remote interfaces that are not aliases 211 * (i.e. remote & metric=0) 212 */ 213 #define AGE_RT(rt_state,ifp) (0 == ((rt_state) & (RS_MHOME | RS_STATIC \ 214 | RS_NET_SYN | RS_RDISC)) \ 215 && (!((rt_state) & RS_IF) \ 216 || (ifp) == 0 \ 217 || (((ifp)->int_state & IS_REMOTE) \ 218 && !((ifp)->int_state & IS_PASSIVE)))) 219 220 /* true if A is better than B 221 * Better if 222 * - A is not a poisoned route 223 * - and A is not stale 224 * - and A has a shorter path 225 * - or is the router speaking for itself 226 * - or the current route is equal but stale 227 * - or it is a host route advertised by a system for itself 228 */ 229 #define BETTER_LINK(rt,A,B) ((A)->rts_metric < HOPCNT_INFINITY \ 230 && now_stale <= (A)->rts_time \ 231 && ((A)->rts_metric < (B)->rts_metric \ 232 || ((A)->rts_gate == (A)->rts_router \ 233 && (B)->rts_gate != (B)->rts_router) \ 234 || ((A)->rts_metric == (B)->rts_metric \ 235 && now_stale > (B)->rts_time) \ 236 || (RT_ISHOST(rt) \ 237 && (rt)->rt_dst == (A)->rts_router \ 238 && (A)->rts_metric == (B)->rts_metric))) 239 240 241 /* An "interface" is similar to a kernel ifnet structure, except it also 242 * handles "logical" or "IS_REMOTE" interfaces (remote gateways). 243 */ 244 struct interface { 245 struct interface *int_next, *int_prev; 246 char int_name[IFNAMSIZ+15+1]; /* big enough for IS_REMOTE */ 247 u_short int_index; 248 naddr int_addr; /* address on this host (net order) */ 249 naddr int_brdaddr; /* broadcast address (n) */ 250 naddr int_dstaddr; /* other end of pt-to-pt link (n) */ 251 naddr int_net; /* working network # (host order)*/ 252 naddr int_mask; /* working net mask (host order) */ 253 naddr int_ripv1_mask; /* for inferring a mask (n) */ 254 naddr int_std_addr; /* class A/B/C address (n) */ 255 naddr int_std_net; /* class A/B/C network (h) */ 256 naddr int_std_mask; /* class A/B/C netmask (h) */ 257 int int_rip_sock; /* for queries */ 258 int int_if_flags; /* some bits copied from kernel */ 259 u_int int_state; 260 time_t int_act_time; /* last thought healthy */ 261 u_short int_transitions; /* times gone up-down */ 262 char int_metric; 263 char int_d_metric; /* for faked default route */ 264 struct int_data { 265 u_int ipackets; /* previous network stats */ 266 u_int ierrors; 267 u_int opackets; 268 u_int oerrors; 269 #ifdef sgi 270 u_int odrops; 271 #endif 272 time_t ts; /* timestamp on network stats */ 273 } int_data; 274 char int_passwd[RIP_AUTH_PW_LEN]; /* RIPv2 password */ 275 int int_rdisc_pref; /* advertised rdisc preference */ 276 int int_rdisc_int; /* MaxAdvertiseInterval */ 277 int int_rdisc_cnt; 278 struct timeval int_rdisc_timer; 279 }; 280 281 /* bits in int_state */ 282 #define IS_ALIAS 0x0000001 /* interface alias */ 283 #define IS_SUBNET 0x0000002 /* interface on subnetted network */ 284 #define IS_REMOTE 0x0000004 /* interface is not on this machine */ 285 #define IS_PASSIVE 0x0000008 /* remote and does not do RIP */ 286 #define IS_EXTERNAL 0x0000010 /* handled by EGP or something */ 287 #define IS_CHECKED 0x0000020 /* still exists */ 288 #define IS_ALL_HOSTS 0x0000040 /* in INADDR_ALLHOSTS_GROUP */ 289 #define IS_ALL_ROUTERS 0x0000080 /* in INADDR_ALLROUTERS_GROUP */ 290 #define IS_RIP_QUERIED 0x0000100 /* query broadcast */ 291 #define IS_BROKE 0x0000200 /* seems to be broken */ 292 #define IS_SICK 0x0000400 /* seems to be broken */ 293 #define IS_DUP 0x0000800 /* has a duplicate address */ 294 #define IS_ACTIVE 0x0001000 /* heard from it at least once */ 295 #define IS_NEED_NET_SYN 0x0002000 /* need RS_NET_SYN route */ 296 #define IS_NO_AG 0x0004000 /* do not aggregate subnets */ 297 #define IS_NO_SUPER_AG 0x0008000 /* do not aggregate networks */ 298 #define IS_NO_RIPV1_IN 0x0010000 /* no RIPv1 input at all */ 299 #define IS_NO_RIPV2_IN 0x0020000 /* no RIPv2 input at all */ 300 #define IS_NO_RIP_IN (IS_NO_RIPV1_IN | IS_NO_RIPV2_IN) 301 #define IS_RIP_IN_OFF(s) (((s) & IS_NO_RIP_IN) == IS_NO_RIP_IN) 302 #define IS_NO_RIPV1_OUT 0x0040000 /* no RIPv1 output at all */ 303 #define IS_NO_RIPV2_OUT 0x0080000 /* no RIPv2 output at all */ 304 #define IS_NO_RIP_OUT (IS_NO_RIPV1_OUT | IS_NO_RIPV2_OUT) 305 #define IS_NO_RIP (IS_NO_RIP_OUT | IS_NO_RIP_IN) 306 #define IS_RIP_OUT_OFF(s) (((s) & IS_NO_RIP_OUT) == IS_NO_RIP_OUT) 307 #define IS_RIP_OFF(s) (((s) & IS_NO_RIP) == IS_NO_RIP) 308 #define IS_NO_ADV_IN 0x0100000 309 #define IS_NO_SOL_OUT 0x0200000 /* no solicitations */ 310 #define IS_SOL_OUT 0x0400000 /* send solicitations */ 311 #define GROUP_IS_SOL (IS_NO_ADV_IN|IS_NO_SOL_OUT) 312 #define IS_NO_ADV_OUT 0x0800000 /* do not advertise rdisc */ 313 #define IS_ADV_OUT 0x1000000 /* advertise rdisc */ 314 #define GROUP_IS_ADV (IS_NO_ADV_OUT|IS_ADV_OUT) 315 #define IS_BCAST_RDISC 0x2000000 /* broadcast instead of multicast */ 316 #define IS_NO_RDISC (IS_NO_ADV_IN | IS_NO_SOL_OUT | IS_NO_ADV_OUT) 317 #define IS_PM_RDISC 0x4000000 /* poor-man's router discovery */ 318 319 #ifdef sgi 320 #define IFF_UP_RUNNING (IFF_RUNNING|IFF_UP) 321 #else 322 #define IFF_UP_RUNNING IFF_UP 323 #endif 324 #define iff_alive(f) (((f) & IFF_UP_RUNNING) == IFF_UP_RUNNING) 325 326 327 /* Information for aggregating routes */ 328 #define NUM_AG_SLOTS 32 329 struct ag_info { 330 struct ag_info *ag_fine; /* slot with finer netmask */ 331 struct ag_info *ag_cors; /* more coarse netmask */ 332 naddr ag_dst_h; /* destination in host byte order */ 333 naddr ag_mask; 334 naddr ag_gate; 335 naddr ag_nhop; 336 char ag_metric; /* metric to be advertised */ 337 char ag_pref; /* aggregate based on this */ 338 u_int ag_seqno; 339 u_short ag_tag; 340 u_short ag_state; 341 #define AGS_SUPPRESS 0x001 /* combine with coaser mask */ 342 #define AGS_PROMOTE 0x002 /* synthesize combined routes */ 343 #define AGS_REDUN0 0x004 /* redundant, finer routes output */ 344 #define AGS_REDUN1 0x008 345 #define AG_IS_REDUN(state) (((state) & (AGS_REDUN0 | AGS_REDUN1)) \ 346 == (AGS_REDUN0 | AGS_REDUN1)) 347 #define AGS_GATEWAY 0x010 /* tell kernel RTF_GATEWAY */ 348 #define AGS_IF 0x020 /* for an interface */ 349 #define AGS_RIPV2 0x040 /* send only as RIPv2 */ 350 #define AGS_FINE_GATE 0x080 /* ignore differing ag_gate when this 351 * has the finer netmask */ 352 #define AGS_CORS_GATE 0x100 /* ignore differing gate when this 353 * has the coarser netmaks */ 354 #define AGS_SPLIT_HZ 0x200 /* suppress for split horizon */ 355 356 /* some bits are set if they are set on either route */ 357 #define AGS_PROMOTE_EITHER (AGS_RIPV2 | AGS_GATEWAY | \ 358 AGS_SUPPRESS | AGS_CORS_GATE) 359 }; 360 361 362 /* parameters for interfaces */ 363 extern struct parm { 364 struct parm *parm_next; 365 char parm_name[IFNAMSIZ+1]; 366 naddr parm_addr_h; 367 naddr parm_mask; 368 369 char parm_d_metric; 370 u_int parm_int_state; 371 int parm_rdisc_pref; 372 int parm_rdisc_int; 373 char parm_passwd[RIP_AUTH_PW_LEN+1]; 374 } *parms; 375 376 /* authority for internal networks */ 377 extern struct intnet { 378 struct intnet *intnet_next; 379 naddr intnet_addr; 380 naddr intnet_mask; 381 char intnet_metric; 382 } *intnets; 383 384 385 386 extern pid_t mypid; 387 extern naddr myaddr; /* main address of this system */ 388 389 extern int stopint; /* !=0 to stop */ 390 391 extern int sock_max; 392 extern int rip_sock; /* RIP socket */ 393 extern struct interface *rip_sock_mcast; /* current multicast interface */ 394 extern int rt_sock; /* routing socket */ 395 extern int rt_sock_seqno; 396 extern int rdisc_sock; /* router-discovery raw socket */ 397 398 extern int seqno; /* sequence number for messages */ 399 extern int supplier; /* process should supply updates */ 400 extern int lookforinterfaces; /* 1=probe for new up interfaces */ 401 extern int supplier_set; /* -s or -q requested */ 402 extern int ridhosts; /* 1=reduce host routes */ 403 extern int mhome; /* 1=want multi-homed host route */ 404 extern int advertise_mhome; /* 1=must continue adverising it */ 405 extern int auth_ok; /* 1=ignore auth if we do not care */ 406 407 extern struct timeval epoch; /* when started */ 408 extern struct timeval now; /* current idea of time */ 409 extern time_t now_stale; 410 extern time_t now_expire; 411 extern time_t now_garbage; 412 413 extern struct timeval next_bcast; /* next general broadcast */ 414 extern struct timeval age_timer; /* next check of old routes */ 415 extern struct timeval no_flash; /* inhibit flash update until then */ 416 extern struct timeval rdisc_timer; /* next advert. or solicitation */ 417 extern int rdisc_ok; /* using solicited route */ 418 419 extern struct timeval ifinit_timer; /* time to check interfaces */ 420 421 extern naddr loopaddr; /* our address on loopback */ 422 extern int tot_interfaces; /* # of remote and local interfaces */ 423 extern int rip_interfaces; /* # of interfaces doing RIP */ 424 extern struct interface *ifnet; /* all interfaces */ 425 extern int have_ripv1_out; /* have a RIPv1 interface */ 426 extern int have_ripv1_in; 427 extern int need_flash; /* flash update needed */ 428 extern struct timeval need_kern; /* need to update kernel table */ 429 extern int update_seqno; /* a route has changed */ 430 431 extern u_int tracelevel, new_tracelevel; 432 #define MAX_TRACELEVEL 4 433 #define TRACEKERNEL (tracelevel >= 4) /* log kernel changes */ 434 #define TRACECONTENTS (tracelevel >= 3) /* display packet contents */ 435 #define TRACEPACKETS (tracelevel >= 2) /* note packets */ 436 #define TRACEACTIONS (tracelevel != 0) 437 extern FILE *ftrace; /* output trace file */ 438 439 extern struct radix_node_head *rhead; 440 441 442 #ifdef sgi 443 /* Fix conflicts */ 444 #define dup2(x,y) BSDdup2(x,y) 445 #endif /* sgi */ 446 447 extern void fix_sock(int, char *); 448 extern void fix_select(void); 449 extern void rip_off(void); 450 extern void rip_on(struct interface *); 451 452 enum output_type {OUT_QUERY, OUT_UNICAST, OUT_BROADCAST, OUT_MULTICAST, 453 NO_OUT_MULTICAST, NO_OUT_RIPV2}; 454 extern int output(enum output_type, struct sockaddr_in *, 455 struct interface *, struct rip *, int); 456 extern void rip_query(void); 457 extern void rip_bcast(int); 458 extern void supply(struct sockaddr_in *, struct interface *, 459 enum output_type, int, int); 460 461 extern void msglog(char *, ...); 462 #define LOGERR(msg) msglog(msg ": %s", strerror(errno)) 463 extern void logbad(int, char *, ...); 464 #define BADERR(dump,msg) logbad(dump,msg ": %s", strerror(errno)) 465 #ifdef DEBUG 466 #define DBGERR(dump,msg) BADERR(dump,msg) 467 #else 468 #define DBGERR(dump,msg) LOGERR(msg) 469 #endif 470 extern char *naddr_ntoa(naddr); 471 extern char *saddr_ntoa(struct sockaddr *); 472 473 extern void *rtmalloc(size_t, char *); 474 extern void timevaladd(struct timeval *, struct timeval *); 475 extern void intvl_random(struct timeval *, u_long, u_long); 476 extern int getnet(char *, naddr *, naddr *); 477 extern int gethost(char *, naddr *); 478 extern void gwkludge(void); 479 extern char *parse_parms(char *); 480 extern char *check_parms(struct parm *); 481 extern void get_parms(struct interface *); 482 483 extern void lastlog(void); 484 extern void trace_on(char *, int); 485 extern void trace_off(char*, ...); 486 extern void trace_flush(void); 487 extern void set_tracelevel(void); 488 extern void trace_kernel(char *, ...); 489 extern void trace_act(char *, ...); 490 extern void trace_pkt(char *, ...); 491 extern void trace_add_del(char *, struct rt_entry *); 492 extern void trace_change(struct rt_entry *, u_int, naddr, naddr, int, 493 u_short, struct interface *, time_t, char *); 494 extern void trace_if(char *, struct interface *); 495 extern void trace_upslot(struct rt_entry *, struct rt_spare *, 496 naddr, naddr, 497 struct interface *, int, u_short, time_t); 498 extern void trace_rip(char*, char*, struct sockaddr_in *, 499 struct interface *, struct rip *, int); 500 extern char *addrname(naddr, naddr, int); 501 502 extern void rdisc_age(naddr); 503 extern void set_rdisc_mg(struct interface *, int); 504 extern void set_supplier(void); 505 extern void if_bad_rdisc(struct interface *); 506 extern void if_ok_rdisc(struct interface *); 507 extern void read_rip(int, struct interface *); 508 extern void read_rt(void); 509 extern void read_d(void); 510 extern void rdisc_adv(void); 511 extern void rdisc_sol(void); 512 513 extern void sigalrm(int); 514 extern void sigterm(int); 515 516 extern void sigtrace_on(int); 517 extern void sigtrace_off(int); 518 519 extern void flush_kern(void); 520 extern void age(naddr); 521 522 extern void ag_flush(naddr, naddr, void (*)(struct ag_info *)); 523 extern void ag_check(naddr, naddr, naddr, naddr, char, char, u_int, 524 u_short, u_short, void (*)(struct ag_info *)); 525 extern void del_static(naddr, naddr, int); 526 extern void del_redirects(naddr, time_t); 527 extern struct rt_entry *rtget(naddr, naddr); 528 extern struct rt_entry *rtfind(naddr); 529 extern void rtinit(void); 530 extern void rtadd(naddr, naddr, naddr, naddr, 531 int, u_short, u_int, struct interface *); 532 extern void rtchange(struct rt_entry *, u_int, naddr,naddr, int, u_short, 533 struct interface *ifp, time_t, char *); 534 extern void rtdelete(struct rt_entry *); 535 extern void rtbad_sub(struct rt_entry *); 536 extern void rtswitch(struct rt_entry *, struct rt_spare *); 537 extern void rtbad(struct rt_entry *); 538 539 540 #define S_ADDR(x) (((struct sockaddr_in *)(x))->sin_addr.s_addr) 541 #define INFO_DST(I) ((I)->rti_info[RTAX_DST]) 542 #define INFO_GATE(I) ((I)->rti_info[RTAX_GATEWAY]) 543 #define INFO_MASK(I) ((I)->rti_info[RTAX_NETMASK]) 544 #define INFO_IFA(I) ((I)->rti_info[RTAX_IFA]) 545 #define INFO_IFP(I) ((I)->rti_info[RTAX_IFP]) 546 #define INFO_AUTHOR(I) ((I)->rti_info[RTAX_AUTHOR]) 547 #define INFO_BRD(I) ((I)->rti_info[RTAX_BRD]) 548 void rt_xaddrs(struct rt_addrinfo *, struct sockaddr *, struct sockaddr *, 549 int); 550 551 extern naddr std_mask(naddr); 552 extern naddr ripv1_mask_net(naddr, struct interface *); 553 extern naddr ripv1_mask_host(naddr,struct interface *); 554 #define on_net(a,net,mask) (((ntohl(a) ^ (net)) & (mask)) == 0) 555 extern int check_dst(naddr); 556 extern void addrouteforif(register struct interface *); 557 extern void ifinit(void); 558 extern int walk_bad(struct radix_node *, struct walkarg *); 559 extern int if_ok(struct interface *, char *); 560 extern void if_sick(struct interface *); 561 extern void if_bad(struct interface *); 562 extern struct interface *ifwithaddr(naddr, int, int); 563 extern struct interface *ifwithname(char *, naddr); 564 extern struct interface *ifwithindex(u_short); 565 extern struct interface *iflookup(naddr); 566