defs.h revision 18316
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 * 35 * $NetBSD$ 36 */ 37 38#ifndef __NetBSD__ 39#ident "$Revision: 1.16 $" 40#endif 41 42/* Definitions for RIPv2 routing process. 43 * 44 * This code is based on the 4.4BSD `routed` daemon, with extensions to 45 * support: 46 * RIPv2, including variable length subnet masks. 47 * Router Discovery 48 * aggregate routes in the kernel tables. 49 * aggregate advertised routes. 50 * maintain spare routes for faster selection of another gateway 51 * when the current gateway dies. 52 * timers on routes with second granularity so that selection 53 * of a new route does not wait 30-60 seconds. 54 * tolerance of static routes. 55 * tell the kernel hop counts 56 * do not advertise if ipforwarding=0 57 * 58 * The vestigual support for other protocols has been removed. There 59 * is no likelihood that IETF RIPv1 or RIPv2 will ever be used with 60 * other protocols. The result is far smaller, faster, cleaner, and 61 * perhaps understandable. 62 * 63 * The accumulation of special flags and kludges added over the many 64 * years have been simplified and integrated. 65 */ 66 67#include <stdio.h> 68#include <netdb.h> 69#include <stdlib.h> 70#include <unistd.h> 71#include <errno.h> 72#include <string.h> 73#ifdef sgi 74#include <strings.h> 75#include <bstring.h> 76#endif 77#include <stdarg.h> 78#include <syslog.h> 79#include <time.h> 80#include <sys/types.h> 81#include <sys/param.h> 82#include <sys/ioctl.h> 83#include <sys/sysctl.h> 84#include <sys/socket.h> 85#ifdef sgi 86#include <net/radix.h> 87#else 88#include "radix.h" 89#endif 90#include <net/if.h> 91#include <net/route.h> 92#include <net/if_dl.h> 93#include <netinet/in.h> 94#include <arpa/inet.h> 95#define RIPVERSION RIPv2 96#include <protocols/routed.h> 97 98 99/* Type of an IP address. 100 * Some systems do not like to pass structures, so do not use in_addr. 101 * Some systems think a long has 64 bits, which would be a gross waste. 102 * So define it here so it can be changed for the target system. 103 * It should be defined somewhere netinet/in.h, but it is not. 104 */ 105#ifdef sgi 106#define naddr __uint32_t 107#else 108#ifdef __NetBSD__ 109#define naddr u_int32_t 110#else 111#define naddr u_long 112#endif 113#define _HAVE_SA_LEN 114#define _HAVE_SIN_LEN 115#endif 116 117/* Turn on if IP_DROP_MEMBERSHIP and IP_ADD_MEMBERSHIP do not look at 118 * the dstaddr of point-to-point interfaces. 119 */ 120/* #define MCAST_PPP_BUG */ 121 122#define NEVER (24*60*60) /* a long time */ 123#define EPOCH NEVER /* bias time by this to avoid <0 */ 124 125/* Scan the kernel regularly to see if any interfaces have appeared or been 126 * turned off. These must be less than STALE_TIME. 127 */ 128#define CHECK_BAD_INTERVAL 5 /* when an interface is known bad */ 129#define CHECK_ACT_INTERVAL 30 /* when advertising */ 130#define CHECK_QUIET_INTERVAL 300 /* when not */ 131 132#define LIM_SEC(s,l) ((s).tv_sec = MIN((s).tv_sec, (l))) 133 134 135/* Router Discovery parameters */ 136#ifndef sgi 137#define INADDR_ALLROUTERS_GROUP 0xe0000002 /* 224.0.0.2 */ 138#endif 139#define MaxMaxAdvertiseInterval 1800 140#define MinMaxAdvertiseInterval 4 141#define DefMaxAdvertiseInterval 600 142#define DEF_PreferenceLevel 0 143#define MIN_PreferenceLevel 0x80000000 144 145#define MAX_INITIAL_ADVERT_INTERVAL 16 146#define MAX_INITIAL_ADVERTS 3 147#define MAX_RESPONSE_DELAY 2 148 149#define MAX_SOLICITATION_DELAY 1 150#define SOLICITATION_INTERVAL 3 151#define MAX_SOLICITATIONS 3 152 153 154/* typical packet buffers */ 155union pkt_buf { 156 char packet[MAXPACKETSIZE+1]; 157 struct rip rip; 158}; 159 160 161/* no more routes than this, to protect ourself in case something goes 162 * whacko and starts broadcast zillions of bogus routes. 163 */ 164#define MAX_ROUTES (128*1024) 165extern int total_routes; 166 167/* Main, daemon routing table structure 168 */ 169struct rt_entry { 170 struct radix_node rt_nodes[2]; /* radix tree glue */ 171 u_int rt_state; 172# define RS_IF 0x001 /* for network interface */ 173# define RS_NET_INT 0x002 /* authority route */ 174# define RS_NET_SYN 0x004 /* fake net route for subnet */ 175# define RS_NO_NET_SYN (RS_LOCAL | RS_LOCAL | RS_IF) 176# define RS_SUBNET 0x008 /* subnet route from any source */ 177# define RS_LOCAL 0x010 /* loopback for pt-to-pt */ 178# define RS_MHOME 0x020 /* from -m */ 179# define RS_STATIC 0x040 /* from the kernel */ 180# define RS_RDISC 0x080 /* from router discovery */ 181 struct sockaddr_in rt_dst_sock; 182 naddr rt_mask; 183 struct rt_spare { 184 struct interface *rts_ifp; 185 naddr rts_gate; /* forward packets here */ 186 naddr rts_router; /* on the authority of this router */ 187 char rts_metric; 188 u_short rts_tag; 189 time_t rts_time; /* timer to junk stale routes */ 190#define NUM_SPARES 4 191 } rt_spares[NUM_SPARES]; 192 u_int rt_seqno; /* when last changed */ 193 char rt_poison_metric; /* to notice maximum recently */ 194 time_t rt_poison_time; /* advertised metric */ 195}; 196#define rt_dst rt_dst_sock.sin_addr.s_addr 197#define rt_ifp rt_spares[0].rts_ifp 198#define rt_gate rt_spares[0].rts_gate 199#define rt_router rt_spares[0].rts_router 200#define rt_metric rt_spares[0].rts_metric 201#define rt_tag rt_spares[0].rts_tag 202#define rt_time rt_spares[0].rts_time 203 204#define HOST_MASK 0xffffffff 205#define RT_ISHOST(rt) ((rt)->rt_mask == HOST_MASK) 206 207/* age all routes that 208 * are not from -g, -m, or static routes from the kernel 209 * not unbroken interface routes 210 * but not broken interfaces 211 * nor non-passive, remote interfaces that are not aliases 212 * (i.e. remote & metric=0) 213 */ 214#define AGE_RT(rt_state,ifp) (0 == ((rt_state) & (RS_MHOME | RS_STATIC \ 215 | RS_NET_SYN | RS_RDISC)) \ 216 && (!((rt_state) & RS_IF) \ 217 || (ifp) == 0 \ 218 || (((ifp)->int_state & IS_REMOTE) \ 219 && !((ifp)->int_state & IS_PASSIVE)))) 220 221/* true if A is better than B 222 * Better if 223 * - A is not a poisoned route 224 * - and A is not stale 225 * - and A has a shorter path 226 * - or is the router speaking for itself 227 * - or the current route is equal but stale 228 * - or it is a host route advertised by a system for itself 229 */ 230#define BETTER_LINK(rt,A,B) ((A)->rts_metric < HOPCNT_INFINITY \ 231 && now_stale <= (A)->rts_time \ 232 && ((A)->rts_metric < (B)->rts_metric \ 233 || ((A)->rts_gate == (A)->rts_router \ 234 && (B)->rts_gate != (B)->rts_router) \ 235 || ((A)->rts_metric == (B)->rts_metric \ 236 && now_stale > (B)->rts_time) \ 237 || (RT_ISHOST(rt) \ 238 && (rt)->rt_dst == (A)->rts_router \ 239 && (A)->rts_metric == (B)->rts_metric))) 240 241 242/* An "interface" is similar to a kernel ifnet structure, except it also 243 * handles "logical" or "IS_REMOTE" interfaces (remote gateways). 244 */ 245struct interface { 246 struct interface *int_next, *int_prev; 247 char int_name[IFNAMSIZ+15+1]; /* big enough for IS_REMOTE */ 248 u_short int_index; 249 naddr int_addr; /* address on this host (net order) */ 250 naddr int_brdaddr; /* broadcast address (n) */ 251 naddr int_dstaddr; /* other end of pt-to-pt link (n) */ 252 naddr int_net; /* working network # (host order)*/ 253 naddr int_mask; /* working net mask (host order) */ 254 naddr int_ripv1_mask; /* for inferring a mask (n) */ 255 naddr int_std_addr; /* class A/B/C address (n) */ 256 naddr int_std_net; /* class A/B/C network (h) */ 257 naddr int_std_mask; /* class A/B/C netmask (h) */ 258 int int_rip_sock; /* for queries */ 259 int int_if_flags; /* some bits copied from kernel */ 260 u_int int_state; 261 time_t int_act_time; /* last thought healthy */ 262 u_short int_transitions; /* times gone up-down */ 263 char int_metric; 264 char int_d_metric; /* for faked default route */ 265 struct int_data { 266 u_int ipackets; /* previous network stats */ 267 u_int ierrors; 268 u_int opackets; 269 u_int oerrors; 270#ifdef sgi 271 u_int odrops; 272#endif 273 time_t ts; /* timestamp on network stats */ 274 } int_data; 275 char int_passwd[RIP_AUTH_PW_LEN]; /* RIPv2 password */ 276 int int_rdisc_pref; /* advertised rdisc preference */ 277 int int_rdisc_int; /* MaxAdvertiseInterval */ 278 int int_rdisc_cnt; 279 struct timeval int_rdisc_timer; 280}; 281 282/* bits in int_state */ 283#define IS_ALIAS 0x0000001 /* interface alias */ 284#define IS_SUBNET 0x0000002 /* interface on subnetted network */ 285#define IS_REMOTE 0x0000004 /* interface is not on this machine */ 286#define IS_PASSIVE 0x0000008 /* remote and does not do RIP */ 287#define IS_EXTERNAL 0x0000010 /* handled by EGP or something */ 288#define IS_CHECKED 0x0000020 /* still exists */ 289#define IS_ALL_HOSTS 0x0000040 /* in INADDR_ALLHOSTS_GROUP */ 290#define IS_ALL_ROUTERS 0x0000080 /* in INADDR_ALLROUTERS_GROUP */ 291#define IS_RIP_QUERIED 0x0000100 /* query broadcast */ 292#define IS_BROKE 0x0000200 /* seems to be broken */ 293#define IS_SICK 0x0000400 /* seems to be broken */ 294#define IS_DUP 0x0000800 /* has a duplicate address */ 295#define IS_ACTIVE 0x0001000 /* heard from it at least once */ 296#define IS_NEED_NET_SYN 0x0002000 /* need RS_NET_SYN route */ 297#define IS_NO_AG 0x0004000 /* do not aggregate subnets */ 298#define IS_NO_SUPER_AG 0x0008000 /* do not aggregate networks */ 299#define IS_NO_RIPV1_IN 0x0010000 /* no RIPv1 input at all */ 300#define IS_NO_RIPV2_IN 0x0020000 /* no RIPv2 input at all */ 301#define IS_NO_RIP_IN (IS_NO_RIPV1_IN | IS_NO_RIPV2_IN) 302#define IS_RIP_IN_OFF(s) (((s) & IS_NO_RIP_IN) == IS_NO_RIP_IN) 303#define IS_NO_RIPV1_OUT 0x0040000 /* no RIPv1 output at all */ 304#define IS_NO_RIPV2_OUT 0x0080000 /* no RIPv2 output at all */ 305#define IS_NO_RIP_OUT (IS_NO_RIPV1_OUT | IS_NO_RIPV2_OUT) 306#define IS_NO_RIP (IS_NO_RIP_OUT | IS_NO_RIP_IN) 307#define IS_RIP_OUT_OFF(s) (((s) & IS_NO_RIP_OUT) == IS_NO_RIP_OUT) 308#define IS_RIP_OFF(s) (((s) & IS_NO_RIP) == IS_NO_RIP) 309#define IS_NO_ADV_IN 0x0100000 310#define IS_NO_SOL_OUT 0x0200000 /* no solicitations */ 311#define IS_SOL_OUT 0x0400000 /* send solicitations */ 312#define GROUP_IS_SOL (IS_NO_ADV_IN|IS_NO_SOL_OUT) 313#define IS_NO_ADV_OUT 0x0800000 /* do not advertise rdisc */ 314#define IS_ADV_OUT 0x1000000 /* advertise rdisc */ 315#define GROUP_IS_ADV (IS_NO_ADV_OUT|IS_ADV_OUT) 316#define IS_BCAST_RDISC 0x2000000 /* broadcast instead of multicast */ 317#define IS_NO_RDISC (IS_NO_ADV_IN | IS_NO_SOL_OUT | IS_NO_ADV_OUT) 318#define IS_PM_RDISC 0x4000000 /* poor-man's router discovery */ 319 320#ifdef sgi 321#define IFF_UP_RUNNING (IFF_RUNNING|IFF_UP) 322#else 323#define IFF_UP_RUNNING IFF_UP 324#endif 325#define iff_alive(f) (((f) & IFF_UP_RUNNING) == IFF_UP_RUNNING) 326 327 328/* Information for aggregating routes */ 329#define NUM_AG_SLOTS 32 330struct ag_info { 331 struct ag_info *ag_fine; /* slot with finer netmask */ 332 struct ag_info *ag_cors; /* more coarse netmask */ 333 naddr ag_dst_h; /* destination in host byte order */ 334 naddr ag_mask; 335 naddr ag_gate; 336 naddr ag_nhop; 337 char ag_metric; /* metric to be advertised */ 338 char ag_pref; /* aggregate based on this */ 339 u_int ag_seqno; 340 u_short ag_tag; 341 u_short ag_state; 342#define AGS_SUPPRESS 0x001 /* combine with coaser mask */ 343#define AGS_PROMOTE 0x002 /* synthesize combined routes */ 344#define AGS_REDUN0 0x004 /* redundant, finer routes output */ 345#define AGS_REDUN1 0x008 346#define AG_IS_REDUN(state) (((state) & (AGS_REDUN0 | AGS_REDUN1)) \ 347 == (AGS_REDUN0 | AGS_REDUN1)) 348#define AGS_GATEWAY 0x010 /* tell kernel RTF_GATEWAY */ 349#define AGS_IF 0x020 /* for an interface */ 350#define AGS_RIPV2 0x040 /* send only as RIPv2 */ 351#define AGS_FINE_GATE 0x080 /* ignore differing ag_gate when this 352 * has the finer netmask */ 353#define AGS_CORS_GATE 0x100 /* ignore differing gate when this 354 * has the coarser netmaks */ 355#define AGS_SPLIT_HZ 0x200 /* suppress for split horizon */ 356 357 /* some bits are set if they are set on either route */ 358#define AGS_PROMOTE_EITHER (AGS_RIPV2 | AGS_GATEWAY | \ 359 AGS_SUPPRESS | AGS_CORS_GATE) 360}; 361 362 363/* parameters for interfaces */ 364extern struct parm { 365 struct parm *parm_next; 366 char parm_name[IFNAMSIZ+1]; 367 naddr parm_addr_h; 368 naddr parm_mask; 369 370 char parm_d_metric; 371 u_int parm_int_state; 372 int parm_rdisc_pref; 373 int parm_rdisc_int; 374 char parm_passwd[RIP_AUTH_PW_LEN+1]; 375} *parms; 376 377/* authority for internal networks */ 378extern struct intnet { 379 struct intnet *intnet_next; 380 naddr intnet_addr; 381 naddr intnet_mask; 382 char intnet_metric; 383} *intnets; 384 385 386 387extern pid_t mypid; 388extern naddr myaddr; /* main address of this system */ 389 390extern int stopint; /* !=0 to stop */ 391 392extern int sock_max; 393extern int rip_sock; /* RIP socket */ 394extern struct interface *rip_sock_mcast; /* current multicast interface */ 395extern int rt_sock; /* routing socket */ 396extern int rt_sock_seqno; 397extern int rdisc_sock; /* router-discovery raw socket */ 398 399extern int seqno; /* sequence number for messages */ 400extern int supplier; /* process should supply updates */ 401extern int lookforinterfaces; /* 1=probe for new up interfaces */ 402extern int supplier_set; /* -s or -q requested */ 403extern int ridhosts; /* 1=reduce host routes */ 404extern int mhome; /* 1=want multi-homed host route */ 405extern int advertise_mhome; /* 1=must continue adverising it */ 406extern int auth_ok; /* 1=ignore auth if we do not care */ 407 408extern struct timeval epoch; /* when started */ 409extern struct timeval now; /* current idea of time */ 410extern time_t now_stale; 411extern time_t now_expire; 412extern time_t now_garbage; 413 414extern struct timeval next_bcast; /* next general broadcast */ 415extern struct timeval age_timer; /* next check of old routes */ 416extern struct timeval no_flash; /* inhibit flash update until then */ 417extern struct timeval rdisc_timer; /* next advert. or solicitation */ 418extern int rdisc_ok; /* using solicited route */ 419 420extern struct timeval ifinit_timer; /* time to check interfaces */ 421 422extern naddr loopaddr; /* our address on loopback */ 423extern int tot_interfaces; /* # of remote and local interfaces */ 424extern int rip_interfaces; /* # of interfaces doing RIP */ 425extern struct interface *ifnet; /* all interfaces */ 426extern int have_ripv1_out; /* have a RIPv1 interface */ 427extern int have_ripv1_in; 428extern int need_flash; /* flash update needed */ 429extern struct timeval need_kern; /* need to update kernel table */ 430extern int update_seqno; /* a route has changed */ 431 432extern u_int tracelevel, new_tracelevel; 433#define MAX_TRACELEVEL 4 434#define TRACEKERNEL (tracelevel >= 4) /* log kernel changes */ 435#define TRACECONTENTS (tracelevel >= 3) /* display packet contents */ 436#define TRACEPACKETS (tracelevel >= 2) /* note packets */ 437#define TRACEACTIONS (tracelevel != 0) 438extern FILE *ftrace; /* output trace file */ 439 440extern struct radix_node_head *rhead; 441 442 443#ifdef sgi 444/* Fix conflicts */ 445#define dup2(x,y) BSDdup2(x,y) 446#endif /* sgi */ 447 448extern void fix_sock(int, char *); 449extern void fix_select(void); 450extern void rip_off(void); 451extern void rip_on(struct interface *); 452 453enum output_type {OUT_QUERY, OUT_UNICAST, OUT_BROADCAST, OUT_MULTICAST, 454 NO_OUT_MULTICAST, NO_OUT_RIPV2}; 455extern int output(enum output_type, struct sockaddr_in *, 456 struct interface *, struct rip *, int); 457extern void rip_query(void); 458extern void rip_bcast(int); 459extern void supply(struct sockaddr_in *, struct interface *, 460 enum output_type, int, int); 461 462extern void msglog(char *, ...); 463#define LOGERR(msg) msglog(msg ": %s", strerror(errno)) 464extern void logbad(int, char *, ...); 465#define BADERR(dump,msg) logbad(dump,msg ": %s", strerror(errno)) 466#ifdef DEBUG 467#define DBGERR(dump,msg) BADERR(dump,msg) 468#else 469#define DBGERR(dump,msg) LOGERR(msg) 470#endif 471extern char *naddr_ntoa(naddr); 472extern char *saddr_ntoa(struct sockaddr *); 473 474extern void *rtmalloc(size_t, char *); 475extern void timevaladd(struct timeval *, struct timeval *); 476extern void intvl_random(struct timeval *, u_long, u_long); 477extern int getnet(char *, naddr *, naddr *); 478extern int gethost(char *, naddr *); 479extern void gwkludge(void); 480extern char *parse_parms(char *); 481extern char *check_parms(struct parm *); 482extern void get_parms(struct interface *); 483 484extern void lastlog(void); 485extern void trace_on(char *, int); 486extern void trace_off(char*, ...); 487extern void trace_flush(void); 488extern void set_tracelevel(void); 489extern void trace_kernel(char *, ...); 490extern void trace_act(char *, ...); 491extern void trace_pkt(char *, ...); 492extern void trace_add_del(char *, struct rt_entry *); 493extern void trace_change(struct rt_entry *, u_int, naddr, naddr, int, 494 u_short, struct interface *, time_t, char *); 495extern void trace_if(char *, struct interface *); 496extern void trace_upslot(struct rt_entry *, struct rt_spare *, 497 naddr, naddr, 498 struct interface *, int, u_short, time_t); 499extern void trace_rip(char*, char*, struct sockaddr_in *, 500 struct interface *, struct rip *, int); 501extern char *addrname(naddr, naddr, int); 502 503extern void rdisc_age(naddr); 504extern void set_rdisc_mg(struct interface *, int); 505extern void set_supplier(void); 506extern void if_bad_rdisc(struct interface *); 507extern void if_ok_rdisc(struct interface *); 508extern void read_rip(int, struct interface *); 509extern void read_rt(void); 510extern void read_d(void); 511extern void rdisc_adv(void); 512extern void rdisc_sol(void); 513 514extern void sigalrm(int); 515extern void sigterm(int); 516 517extern void sigtrace_on(int); 518extern void sigtrace_off(int); 519 520extern void flush_kern(void); 521extern void age(naddr); 522 523extern void ag_flush(naddr, naddr, void (*)(struct ag_info *)); 524extern void ag_check(naddr, naddr, naddr, naddr, char, char, u_int, 525 u_short, u_short, void (*)(struct ag_info *)); 526extern void del_static(naddr, naddr, int); 527extern void del_redirects(naddr, time_t); 528extern struct rt_entry *rtget(naddr, naddr); 529extern struct rt_entry *rtfind(naddr); 530extern void rtinit(void); 531extern void rtadd(naddr, naddr, naddr, naddr, 532 int, u_short, u_int, struct interface *); 533extern void rtchange(struct rt_entry *, u_int, naddr,naddr, int, u_short, 534 struct interface *ifp, time_t, char *); 535extern void rtdelete(struct rt_entry *); 536extern void rtbad_sub(struct rt_entry *); 537extern void rtswitch(struct rt_entry *, struct rt_spare *); 538extern void rtbad(struct rt_entry *); 539 540 541#define S_ADDR(x) (((struct sockaddr_in *)(x))->sin_addr.s_addr) 542#define INFO_DST(I) ((I)->rti_info[RTAX_DST]) 543#define INFO_GATE(I) ((I)->rti_info[RTAX_GATEWAY]) 544#define INFO_MASK(I) ((I)->rti_info[RTAX_NETMASK]) 545#define INFO_IFA(I) ((I)->rti_info[RTAX_IFA]) 546#define INFO_IFP(I) ((I)->rti_info[RTAX_IFP]) 547#define INFO_AUTHOR(I) ((I)->rti_info[RTAX_AUTHOR]) 548#define INFO_BRD(I) ((I)->rti_info[RTAX_BRD]) 549void rt_xaddrs(struct rt_addrinfo *, struct sockaddr *, struct sockaddr *, 550 int); 551 552extern naddr std_mask(naddr); 553extern naddr ripv1_mask_net(naddr, struct interface *); 554extern naddr ripv1_mask_host(naddr,struct interface *); 555#define on_net(a,net,mask) (((ntohl(a) ^ (net)) & (mask)) == 0) 556extern int check_dst(naddr); 557extern void addrouteforif(register struct interface *); 558extern void ifinit(void); 559extern int walk_bad(struct radix_node *, struct walkarg *); 560extern int if_ok(struct interface *, char *); 561extern void if_sick(struct interface *); 562extern void if_bad(struct interface *); 563extern struct interface *ifwithaddr(naddr, int, int); 564extern struct interface *ifwithname(char *, naddr); 565extern struct interface *ifwithindex(u_short); 566extern struct interface *iflookup(naddr); 567