1 1.28 maya /* $NetBSD: defs.h,v 1.28 2017/10/02 11:02:19 maya Exp $ */ 2 1.9 cgd 3 1.1 cgd /* 4 1.6 mycroft * Copyright (c) 1983, 1988, 1993 5 1.6 mycroft * The Regents of the University of California. All rights reserved. 6 1.1 cgd * 7 1.1 cgd * Redistribution and use in source and binary forms, with or without 8 1.1 cgd * modification, are permitted provided that the following conditions 9 1.1 cgd * are met: 10 1.1 cgd * 1. Redistributions of source code must retain the above copyright 11 1.1 cgd * notice, this list of conditions and the following disclaimer. 12 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 cgd * notice, this list of conditions and the following disclaimer in the 14 1.1 cgd * documentation and/or other materials provided with the distribution. 15 1.1 cgd * 3. All advertising materials mentioning features or use of this software 16 1.17 christos * must display the following acknowledgment: 17 1.1 cgd * This product includes software developed by the University of 18 1.1 cgd * California, Berkeley and its contributors. 19 1.1 cgd * 4. Neither the name of the University nor the names of its contributors 20 1.1 cgd * may be used to endorse or promote products derived from this software 21 1.1 cgd * without specific prior written permission. 22 1.1 cgd * 23 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 1.1 cgd * SUCH DAMAGE. 34 1.1 cgd * 35 1.9 cgd * @(#)defs.h 8.1 (Berkeley) 6/5/93 36 1.20 christos * 37 1.20 christos * $FreeBSD$ 38 1.22 christos * "Revision: 2.27 " 39 1.1 cgd */ 40 1.1 cgd 41 1.12 thorpej /* Definitions for RIPv2 routing process. 42 1.12 thorpej * 43 1.12 thorpej * This code is based on the 4.4BSD `routed` daemon, with extensions to 44 1.12 thorpej * support: 45 1.12 thorpej * RIPv2, including variable length subnet masks. 46 1.12 thorpej * Router Discovery 47 1.12 thorpej * aggregate routes in the kernel tables. 48 1.12 thorpej * aggregate advertised routes. 49 1.12 thorpej * maintain spare routes for faster selection of another gateway 50 1.12 thorpej * when the current gateway dies. 51 1.12 thorpej * timers on routes with second granularity so that selection 52 1.12 thorpej * of a new route does not wait 30-60 seconds. 53 1.12 thorpej * tolerance of static routes. 54 1.12 thorpej * tell the kernel hop counts 55 1.12 thorpej * do not advertise if ipforwarding=0 56 1.12 thorpej * 57 1.17 christos * The vestigial support for other protocols has been removed. There 58 1.12 thorpej * is no likelihood that IETF RIPv1 or RIPv2 will ever be used with 59 1.12 thorpej * other protocols. The result is far smaller, faster, cleaner, and 60 1.12 thorpej * perhaps understandable. 61 1.12 thorpej * 62 1.12 thorpej * The accumulation of special flags and kludges added over the many 63 1.12 thorpej * years have been simplified and integrated. 64 1.1 cgd */ 65 1.12 thorpej 66 1.12 thorpej #include <stdio.h> 67 1.12 thorpej #include <netdb.h> 68 1.12 thorpej #include <stdlib.h> 69 1.12 thorpej #include <unistd.h> 70 1.12 thorpej #include <errno.h> 71 1.12 thorpej #include <string.h> 72 1.12 thorpej #include <stdarg.h> 73 1.12 thorpej #include <syslog.h> 74 1.12 thorpej #include <time.h> 75 1.17 christos #include <sys/cdefs.h> 76 1.14 christos #include <sys/time.h> 77 1.12 thorpej #include <sys/types.h> 78 1.1 cgd #include <sys/param.h> 79 1.12 thorpej #include <sys/ioctl.h> 80 1.12 thorpej #include <sys/sysctl.h> 81 1.1 cgd #include <sys/socket.h> 82 1.13 christos #include "radix.h" 83 1.18 christos #define UNUSED __attribute__((unused)) 84 1.18 christos #define PATTRIB(f,l) __attribute__((format (printf,f,l))) 85 1.12 thorpej #include <net/if.h> 86 1.1 cgd #include <net/route.h> 87 1.12 thorpej #include <net/if_dl.h> 88 1.1 cgd #include <netinet/in.h> 89 1.12 thorpej #include <arpa/inet.h> 90 1.12 thorpej #define RIPVERSION RIPv2 91 1.1 cgd #include <protocols/routed.h> 92 1.1 cgd 93 1.20 christos #ifndef __RCSID 94 1.20 christos #define __RCSID(_s) static const char rcsid[] UNUSED = _s 95 1.20 christos #endif 96 1.20 christos #ifndef __COPYRIGHT 97 1.20 christos #define __COPYRIGHT(_s) static const char copyright[] UNUSED = _s 98 1.20 christos #endif 99 1.17 christos 100 1.12 thorpej /* Type of an IP address. 101 1.12 thorpej * Some systems do not like to pass structures, so do not use in_addr. 102 1.12 thorpej * Some systems think a long has 64 bits, which would be a gross waste. 103 1.12 thorpej * So define it here so it can be changed for the target system. 104 1.12 thorpej * It should be defined somewhere netinet/in.h, but it is not. 105 1.12 thorpej */ 106 1.28 maya #if defined (__NetBSD__) 107 1.12 thorpej #define naddr u_int32_t 108 1.12 thorpej #define _HAVE_SA_LEN 109 1.12 thorpej #define _HAVE_SIN_LEN 110 1.12 thorpej #else 111 1.12 thorpej #define naddr u_long 112 1.12 thorpej #define _HAVE_SA_LEN 113 1.12 thorpej #define _HAVE_SIN_LEN 114 1.12 thorpej #endif 115 1.12 thorpej 116 1.19 itojun /* Turn on if IP_{ADD,DROP}_MEMBERSHIP and IP_MULTICAST_IF considers address 117 1.19 itojun * within 0.0.0.0/8 as interface index. 118 1.19 itojun */ 119 1.19 itojun #ifdef __NetBSD__ 120 1.19 itojun #define MCAST_IFINDEX 121 1.19 itojun #endif 122 1.19 itojun 123 1.12 thorpej /* Turn on if IP_DROP_MEMBERSHIP and IP_ADD_MEMBERSHIP do not look at 124 1.12 thorpej * the dstaddr of point-to-point interfaces. 125 1.22 christos * #define MCAST_PPP_BUG 126 1.12 thorpej */ 127 1.19 itojun #ifdef MCAST_IFINDEX 128 1.19 itojun #undef MCAST_PPP_BUG 129 1.14 christos #endif 130 1.12 thorpej 131 1.14 christos #define DAY (24*60*60) 132 1.14 christos #define NEVER DAY /* a long time */ 133 1.12 thorpej #define EPOCH NEVER /* bias time by this to avoid <0 */ 134 1.12 thorpej 135 1.12 thorpej /* Scan the kernel regularly to see if any interfaces have appeared or been 136 1.12 thorpej * turned off. These must be less than STALE_TIME. 137 1.12 thorpej */ 138 1.12 thorpej #define CHECK_BAD_INTERVAL 5 /* when an interface is known bad */ 139 1.12 thorpej #define CHECK_ACT_INTERVAL 30 /* when advertising */ 140 1.12 thorpej #define CHECK_QUIET_INTERVAL 300 /* when not */ 141 1.12 thorpej 142 1.12 thorpej #define LIM_SEC(s,l) ((s).tv_sec = MIN((s).tv_sec, (l))) 143 1.12 thorpej 144 1.14 christos /* Metric used for fake default routes. It ought to be 15, but when 145 1.14 christos * processing advertised routes, previous versions of `routed` added 146 1.14 christos * to the received metric and discarded the route if the total was 16 147 1.14 christos * or larger. 148 1.14 christos */ 149 1.14 christos #define FAKE_METRIC (HOPCNT_INFINITY-2) 150 1.14 christos 151 1.12 thorpej 152 1.12 thorpej /* Router Discovery parameters */ 153 1.12 thorpej #define INADDR_ALLROUTERS_GROUP 0xe0000002 /* 224.0.0.2 */ 154 1.12 thorpej #define MaxMaxAdvertiseInterval 1800 155 1.12 thorpej #define MinMaxAdvertiseInterval 4 156 1.12 thorpej #define DefMaxAdvertiseInterval 600 157 1.12 thorpej #define DEF_PreferenceLevel 0 158 1.12 thorpej #define MIN_PreferenceLevel 0x80000000 159 1.12 thorpej 160 1.12 thorpej #define MAX_INITIAL_ADVERT_INTERVAL 16 161 1.12 thorpej #define MAX_INITIAL_ADVERTS 3 162 1.12 thorpej #define MAX_RESPONSE_DELAY 2 163 1.12 thorpej 164 1.12 thorpej #define MAX_SOLICITATION_DELAY 1 165 1.12 thorpej #define SOLICITATION_INTERVAL 3 166 1.12 thorpej #define MAX_SOLICITATIONS 3 167 1.12 thorpej 168 1.12 thorpej 169 1.14 christos /* Bloated packet size for systems that simply add authentication to 170 1.14 christos * full-sized packets 171 1.14 christos */ 172 1.14 christos #define OVER_MAXPACKETSIZE (MAXPACKETSIZE+sizeof(struct netinfo)*2) 173 1.12 thorpej /* typical packet buffers */ 174 1.12 thorpej union pkt_buf { 175 1.14 christos char packet[OVER_MAXPACKETSIZE*2]; 176 1.12 thorpej struct rip rip; 177 1.12 thorpej }; 178 1.12 thorpej 179 1.16 thorpej #define GNAME_LEN 64 /* assumed=64 in parms.c */ 180 1.16 thorpej /* bigger than IFNAMSIZ, with room for "external()" or "remote()" */ 181 1.16 thorpej #define IF_NAME_LEN (GNAME_LEN+15) 182 1.12 thorpej 183 1.14 christos /* No more routes than this, to protect ourself in case something goes 184 1.14 christos * whacko and starts broadcasting zillions of bogus routes. 185 1.13 christos */ 186 1.13 christos #define MAX_ROUTES (128*1024) 187 1.13 christos extern int total_routes; 188 1.13 christos 189 1.12 thorpej /* Main, daemon routing table structure 190 1.12 thorpej */ 191 1.12 thorpej struct rt_entry { 192 1.12 thorpej struct radix_node rt_nodes[2]; /* radix tree glue */ 193 1.12 thorpej u_int rt_state; 194 1.12 thorpej # define RS_IF 0x001 /* for network interface */ 195 1.12 thorpej # define RS_NET_INT 0x002 /* authority route */ 196 1.12 thorpej # define RS_NET_SYN 0x004 /* fake net route for subnet */ 197 1.27 wiz # define RS_NO_NET_SYN (RS_LOCAL | RS_IF) 198 1.12 thorpej # define RS_SUBNET 0x008 /* subnet route from any source */ 199 1.12 thorpej # define RS_LOCAL 0x010 /* loopback for pt-to-pt */ 200 1.12 thorpej # define RS_MHOME 0x020 /* from -m */ 201 1.12 thorpej # define RS_STATIC 0x040 /* from the kernel */ 202 1.12 thorpej # define RS_RDISC 0x080 /* from router discovery */ 203 1.12 thorpej struct sockaddr_in rt_dst_sock; 204 1.12 thorpej naddr rt_mask; 205 1.12 thorpej struct rt_spare { 206 1.12 thorpej struct interface *rts_ifp; 207 1.12 thorpej naddr rts_gate; /* forward packets here */ 208 1.12 thorpej naddr rts_router; /* on the authority of this router */ 209 1.12 thorpej char rts_metric; 210 1.12 thorpej u_short rts_tag; 211 1.12 thorpej time_t rts_time; /* timer to junk stale routes */ 212 1.16 thorpej u_int rts_de_ag; /* de-aggregation level */ 213 1.12 thorpej #define NUM_SPARES 4 214 1.12 thorpej } rt_spares[NUM_SPARES]; 215 1.12 thorpej u_int rt_seqno; /* when last changed */ 216 1.12 thorpej char rt_poison_metric; /* to notice maximum recently */ 217 1.12 thorpej time_t rt_poison_time; /* advertised metric */ 218 1.12 thorpej }; 219 1.16 thorpej #define rt_dst rt_dst_sock.sin_addr.s_addr 220 1.16 thorpej #define rt_ifp rt_spares[0].rts_ifp 221 1.16 thorpej #define rt_gate rt_spares[0].rts_gate 222 1.16 thorpej #define rt_router rt_spares[0].rts_router 223 1.16 thorpej #define rt_metric rt_spares[0].rts_metric 224 1.16 thorpej #define rt_tag rt_spares[0].rts_tag 225 1.16 thorpej #define rt_time rt_spares[0].rts_time 226 1.16 thorpej #define rt_de_ag rt_spares[0].rts_de_ag 227 1.12 thorpej 228 1.12 thorpej #define HOST_MASK 0xffffffff 229 1.12 thorpej #define RT_ISHOST(rt) ((rt)->rt_mask == HOST_MASK) 230 1.12 thorpej 231 1.12 thorpej /* age all routes that 232 1.12 thorpej * are not from -g, -m, or static routes from the kernel 233 1.12 thorpej * not unbroken interface routes 234 1.12 thorpej * but not broken interfaces 235 1.12 thorpej * nor non-passive, remote interfaces that are not aliases 236 1.12 thorpej * (i.e. remote & metric=0) 237 1.12 thorpej */ 238 1.13 christos #define AGE_RT(rt_state,ifp) (0 == ((rt_state) & (RS_MHOME | RS_STATIC \ 239 1.13 christos | RS_NET_SYN | RS_RDISC)) \ 240 1.13 christos && (!((rt_state) & RS_IF) \ 241 1.13 christos || (ifp) == 0 \ 242 1.13 christos || (((ifp)->int_state & IS_REMOTE) \ 243 1.13 christos && !((ifp)->int_state & IS_PASSIVE)))) 244 1.12 thorpej 245 1.12 thorpej /* true if A is better than B 246 1.12 thorpej * Better if 247 1.12 thorpej * - A is not a poisoned route 248 1.12 thorpej * - and A is not stale 249 1.12 thorpej * - and A has a shorter path 250 1.12 thorpej * - or is the router speaking for itself 251 1.12 thorpej * - or the current route is equal but stale 252 1.12 thorpej * - or it is a host route advertised by a system for itself 253 1.12 thorpej */ 254 1.14 christos #define BETTER_LINK(rt,A,B) ((A)->rts_metric < HOPCNT_INFINITY \ 255 1.12 thorpej && now_stale <= (A)->rts_time \ 256 1.12 thorpej && ((A)->rts_metric < (B)->rts_metric \ 257 1.12 thorpej || ((A)->rts_gate == (A)->rts_router \ 258 1.12 thorpej && (B)->rts_gate != (B)->rts_router) \ 259 1.12 thorpej || ((A)->rts_metric == (B)->rts_metric \ 260 1.12 thorpej && now_stale > (B)->rts_time) \ 261 1.12 thorpej || (RT_ISHOST(rt) \ 262 1.12 thorpej && (rt)->rt_dst == (A)->rts_router \ 263 1.12 thorpej && (A)->rts_metric == (B)->rts_metric))) 264 1.1 cgd 265 1.1 cgd 266 1.12 thorpej /* An "interface" is similar to a kernel ifnet structure, except it also 267 1.12 thorpej * handles "logical" or "IS_REMOTE" interfaces (remote gateways). 268 1.12 thorpej */ 269 1.12 thorpej struct interface { 270 1.14 christos struct interface *int_next, **int_prev; 271 1.14 christos struct interface *int_ahash, **int_ahash_prev; 272 1.14 christos struct interface *int_bhash, **int_bhash_prev; 273 1.14 christos struct interface *int_rlink, **int_rlink_prev; 274 1.14 christos struct interface *int_nhash, **int_nhash_prev; 275 1.16 thorpej char int_name[IF_NAME_LEN+1]; 276 1.12 thorpej u_short int_index; 277 1.12 thorpej naddr int_addr; /* address on this host (net order) */ 278 1.12 thorpej naddr int_brdaddr; /* broadcast address (n) */ 279 1.12 thorpej naddr int_dstaddr; /* other end of pt-to-pt link (n) */ 280 1.12 thorpej naddr int_net; /* working network # (host order)*/ 281 1.12 thorpej naddr int_mask; /* working net mask (host order) */ 282 1.12 thorpej naddr int_ripv1_mask; /* for inferring a mask (n) */ 283 1.12 thorpej naddr int_std_addr; /* class A/B/C address (n) */ 284 1.12 thorpej naddr int_std_net; /* class A/B/C network (h) */ 285 1.12 thorpej naddr int_std_mask; /* class A/B/C netmask (h) */ 286 1.12 thorpej int int_rip_sock; /* for queries */ 287 1.13 christos int int_if_flags; /* some bits copied from kernel */ 288 1.12 thorpej u_int int_state; 289 1.12 thorpej time_t int_act_time; /* last thought healthy */ 290 1.14 christos time_t int_query_time; 291 1.12 thorpej u_short int_transitions; /* times gone up-down */ 292 1.12 thorpej char int_metric; 293 1.22 christos u_char int_d_metric; /* for faked default route */ 294 1.22 christos u_char int_adj_inmetric; /* adjust advertised metrics */ 295 1.22 christos u_char int_adj_outmetric; /* instead of interface metric */ 296 1.12 thorpej struct int_data { 297 1.12 thorpej u_int ipackets; /* previous network stats */ 298 1.12 thorpej u_int ierrors; 299 1.12 thorpej u_int opackets; 300 1.12 thorpej u_int oerrors; 301 1.12 thorpej time_t ts; /* timestamp on network stats */ 302 1.12 thorpej } int_data; 303 1.14 christos # define MAX_AUTH_KEYS 5 304 1.14 christos struct auth { /* authentication info */ 305 1.17 christos u_int16_t type; 306 1.18 christos u_char key[RIP_AUTH_PW_LEN]; 307 1.14 christos u_char keyid; 308 1.14 christos time_t start, end; 309 1.14 christos } int_auth[MAX_AUTH_KEYS]; 310 1.16 thorpej /* router discovery parameters */ 311 1.16 thorpej int int_rdisc_pref; /* signed preference to advertise */ 312 1.12 thorpej int int_rdisc_int; /* MaxAdvertiseInterval */ 313 1.12 thorpej int int_rdisc_cnt; 314 1.12 thorpej struct timeval int_rdisc_timer; 315 1.12 thorpej }; 316 1.12 thorpej 317 1.13 christos /* bits in int_state */ 318 1.12 thorpej #define IS_ALIAS 0x0000001 /* interface alias */ 319 1.12 thorpej #define IS_SUBNET 0x0000002 /* interface on subnetted network */ 320 1.12 thorpej #define IS_REMOTE 0x0000004 /* interface is not on this machine */ 321 1.12 thorpej #define IS_PASSIVE 0x0000008 /* remote and does not do RIP */ 322 1.12 thorpej #define IS_EXTERNAL 0x0000010 /* handled by EGP or something */ 323 1.12 thorpej #define IS_CHECKED 0x0000020 /* still exists */ 324 1.12 thorpej #define IS_ALL_HOSTS 0x0000040 /* in INADDR_ALLHOSTS_GROUP */ 325 1.12 thorpej #define IS_ALL_ROUTERS 0x0000080 /* in INADDR_ALLROUTERS_GROUP */ 326 1.14 christos #define IS_DISTRUST 0x0000100 /* ignore untrusted routers */ 327 1.14 christos #define IS_REDIRECT_OK 0x0000200 /* accept ICMP redirects */ 328 1.14 christos #define IS_BROKE 0x0000400 /* seems to be broken */ 329 1.14 christos #define IS_SICK 0x0000800 /* seems to be broken */ 330 1.14 christos #define IS_DUP 0x0001000 /* has a duplicate address */ 331 1.12 thorpej #define IS_NEED_NET_SYN 0x0002000 /* need RS_NET_SYN route */ 332 1.12 thorpej #define IS_NO_AG 0x0004000 /* do not aggregate subnets */ 333 1.12 thorpej #define IS_NO_SUPER_AG 0x0008000 /* do not aggregate networks */ 334 1.12 thorpej #define IS_NO_RIPV1_IN 0x0010000 /* no RIPv1 input at all */ 335 1.12 thorpej #define IS_NO_RIPV2_IN 0x0020000 /* no RIPv2 input at all */ 336 1.12 thorpej #define IS_NO_RIP_IN (IS_NO_RIPV1_IN | IS_NO_RIPV2_IN) 337 1.12 thorpej #define IS_RIP_IN_OFF(s) (((s) & IS_NO_RIP_IN) == IS_NO_RIP_IN) 338 1.12 thorpej #define IS_NO_RIPV1_OUT 0x0040000 /* no RIPv1 output at all */ 339 1.12 thorpej #define IS_NO_RIPV2_OUT 0x0080000 /* no RIPv2 output at all */ 340 1.12 thorpej #define IS_NO_RIP_OUT (IS_NO_RIPV1_OUT | IS_NO_RIPV2_OUT) 341 1.12 thorpej #define IS_NO_RIP (IS_NO_RIP_OUT | IS_NO_RIP_IN) 342 1.12 thorpej #define IS_RIP_OUT_OFF(s) (((s) & IS_NO_RIP_OUT) == IS_NO_RIP_OUT) 343 1.12 thorpej #define IS_RIP_OFF(s) (((s) & IS_NO_RIP) == IS_NO_RIP) 344 1.16 thorpej #define IS_NO_RIP_MCAST 0x0100000 /* broadcast RIPv2 */ 345 1.16 thorpej #define IS_NO_ADV_IN 0x0200000 /* do not listen to advertisements */ 346 1.16 thorpej #define IS_NO_SOL_OUT 0x0400000 /* send no solicitations */ 347 1.16 thorpej #define IS_SOL_OUT 0x0800000 /* send solicitations */ 348 1.16 thorpej #define GROUP_IS_SOL_OUT (IS_SOL_OUT | IS_NO_SOL_OUT) 349 1.16 thorpej #define IS_NO_ADV_OUT 0x1000000 /* do not advertise rdisc */ 350 1.16 thorpej #define IS_ADV_OUT 0x2000000 /* advertise rdisc */ 351 1.16 thorpej #define GROUP_IS_ADV_OUT (IS_NO_ADV_OUT | IS_ADV_OUT) 352 1.16 thorpej #define IS_BCAST_RDISC 0x4000000 /* broadcast instead of multicast */ 353 1.12 thorpej #define IS_NO_RDISC (IS_NO_ADV_IN | IS_NO_SOL_OUT | IS_NO_ADV_OUT) 354 1.16 thorpej #define IS_PM_RDISC 0x8000000 /* poor-man's router discovery */ 355 1.12 thorpej 356 1.16 thorpej #define iff_up(f) ((f) & IFF_UP) 357 1.12 thorpej 358 1.12 thorpej 359 1.12 thorpej /* Information for aggregating routes */ 360 1.12 thorpej #define NUM_AG_SLOTS 32 361 1.12 thorpej struct ag_info { 362 1.12 thorpej struct ag_info *ag_fine; /* slot with finer netmask */ 363 1.12 thorpej struct ag_info *ag_cors; /* more coarse netmask */ 364 1.12 thorpej naddr ag_dst_h; /* destination in host byte order */ 365 1.12 thorpej naddr ag_mask; 366 1.12 thorpej naddr ag_gate; 367 1.12 thorpej naddr ag_nhop; 368 1.12 thorpej char ag_metric; /* metric to be advertised */ 369 1.12 thorpej char ag_pref; /* aggregate based on this */ 370 1.12 thorpej u_int ag_seqno; 371 1.12 thorpej u_short ag_tag; 372 1.12 thorpej u_short ag_state; 373 1.17 christos #define AGS_SUPPRESS 0x001 /* combine with coarser mask */ 374 1.16 thorpej #define AGS_AGGREGATE 0x002 /* synthesize combined routes */ 375 1.12 thorpej #define AGS_REDUN0 0x004 /* redundant, finer routes output */ 376 1.12 thorpej #define AGS_REDUN1 0x008 377 1.12 thorpej #define AG_IS_REDUN(state) (((state) & (AGS_REDUN0 | AGS_REDUN1)) \ 378 1.12 thorpej == (AGS_REDUN0 | AGS_REDUN1)) 379 1.12 thorpej #define AGS_GATEWAY 0x010 /* tell kernel RTF_GATEWAY */ 380 1.12 thorpej #define AGS_IF 0x020 /* for an interface */ 381 1.12 thorpej #define AGS_RIPV2 0x040 /* send only as RIPv2 */ 382 1.12 thorpej #define AGS_FINE_GATE 0x080 /* ignore differing ag_gate when this 383 1.12 thorpej * has the finer netmask */ 384 1.12 thorpej #define AGS_CORS_GATE 0x100 /* ignore differing gate when this 385 1.18 christos * has the coarser netmasks */ 386 1.12 thorpej #define AGS_SPLIT_HZ 0x200 /* suppress for split horizon */ 387 1.12 thorpej 388 1.12 thorpej /* some bits are set if they are set on either route */ 389 1.16 thorpej #define AGS_AGGREGATE_EITHER (AGS_RIPV2 | AGS_GATEWAY | \ 390 1.16 thorpej AGS_SUPPRESS | AGS_CORS_GATE) 391 1.12 thorpej }; 392 1.12 thorpej 393 1.12 thorpej 394 1.12 thorpej /* parameters for interfaces */ 395 1.12 thorpej extern struct parm { 396 1.12 thorpej struct parm *parm_next; 397 1.16 thorpej char parm_name[IF_NAME_LEN+1]; 398 1.14 christos naddr parm_net; 399 1.12 thorpej naddr parm_mask; 400 1.12 thorpej 401 1.22 christos u_char parm_d_metric; 402 1.22 christos u_char parm_adj_inmetric; 403 1.22 christos u_char parm_adj_outmetric; 404 1.12 thorpej u_int parm_int_state; 405 1.16 thorpej int parm_rdisc_pref; /* signed IRDP preference */ 406 1.17 christos int parm_rdisc_int; /* IRDP advertising interval */ 407 1.14 christos struct auth parm_auth[MAX_AUTH_KEYS]; 408 1.12 thorpej } *parms; 409 1.12 thorpej 410 1.12 thorpej /* authority for internal networks */ 411 1.12 thorpej extern struct intnet { 412 1.12 thorpej struct intnet *intnet_next; 413 1.16 thorpej naddr intnet_addr; /* network byte order */ 414 1.12 thorpej naddr intnet_mask; 415 1.12 thorpej char intnet_metric; 416 1.12 thorpej } *intnets; 417 1.12 thorpej 418 1.16 thorpej /* defined RIPv1 netmasks */ 419 1.16 thorpej extern struct r1net { 420 1.16 thorpej struct r1net *r1net_next; 421 1.16 thorpej naddr r1net_net; /* host order */ 422 1.16 thorpej naddr r1net_match; 423 1.16 thorpej naddr r1net_mask; 424 1.16 thorpej } *r1nets; 425 1.16 thorpej 426 1.14 christos /* trusted routers */ 427 1.14 christos extern struct tgate { 428 1.14 christos struct tgate *tgate_next; 429 1.14 christos naddr tgate_addr; 430 1.16 thorpej #define MAX_TGATE_NETS 32 431 1.16 thorpej struct tgate_net { 432 1.16 thorpej naddr net; /* host order */ 433 1.16 thorpej naddr mask; 434 1.16 thorpej } tgate_nets[MAX_TGATE_NETS]; 435 1.14 christos } *tgates; 436 1.14 christos 437 1.14 christos enum output_type {OUT_QUERY, OUT_UNICAST, OUT_BROADCAST, OUT_MULTICAST, 438 1.14 christos NO_OUT_MULTICAST, NO_OUT_RIPV2}; 439 1.12 thorpej 440 1.14 christos /* common output buffers */ 441 1.14 christos extern struct ws_buf { 442 1.14 christos struct rip *buf; 443 1.14 christos struct netinfo *n; 444 1.14 christos struct netinfo *base; 445 1.14 christos struct netinfo *lim; 446 1.14 christos enum output_type type; 447 1.14 christos } v12buf, v2buf; 448 1.12 thorpej 449 1.12 thorpej extern pid_t mypid; 450 1.12 thorpej extern naddr myaddr; /* main address of this system */ 451 1.12 thorpej 452 1.12 thorpej extern int stopint; /* !=0 to stop */ 453 1.12 thorpej 454 1.12 thorpej extern int sock_max; 455 1.12 thorpej extern int rip_sock; /* RIP socket */ 456 1.12 thorpej extern struct interface *rip_sock_mcast; /* current multicast interface */ 457 1.12 thorpej extern int rt_sock; /* routing socket */ 458 1.12 thorpej extern int rt_sock_seqno; 459 1.12 thorpej extern int rdisc_sock; /* router-discovery raw socket */ 460 1.12 thorpej 461 1.22 christos extern int seqno; /* sequence number for messages */ 462 1.12 thorpej extern int supplier; /* process should supply updates */ 463 1.16 thorpej extern int supplier_set; /* -s or -q requested */ 464 1.12 thorpej extern int lookforinterfaces; /* 1=probe for new up interfaces */ 465 1.12 thorpej extern int ridhosts; /* 1=reduce host routes */ 466 1.12 thorpej extern int mhome; /* 1=want multi-homed host route */ 467 1.17 christos extern int advertise_mhome; /* 1=must continue advertising it */ 468 1.12 thorpej extern int auth_ok; /* 1=ignore auth if we do not care */ 469 1.12 thorpej 470 1.14 christos extern struct timeval clk; /* system clock's idea of time */ 471 1.14 christos extern struct timeval epoch; /* system clock when started */ 472 1.12 thorpej extern struct timeval now; /* current idea of time */ 473 1.12 thorpej extern time_t now_stale; 474 1.13 christos extern time_t now_expire; 475 1.12 thorpej extern time_t now_garbage; 476 1.12 thorpej 477 1.12 thorpej extern struct timeval next_bcast; /* next general broadcast */ 478 1.12 thorpej extern struct timeval age_timer; /* next check of old routes */ 479 1.12 thorpej extern struct timeval no_flash; /* inhibit flash update until then */ 480 1.12 thorpej extern struct timeval rdisc_timer; /* next advert. or solicitation */ 481 1.17 christos extern int rdisc_ok; /* using solicited route */ 482 1.12 thorpej 483 1.12 thorpej extern struct timeval ifinit_timer; /* time to check interfaces */ 484 1.12 thorpej 485 1.12 thorpej extern naddr loopaddr; /* our address on loopback */ 486 1.12 thorpej extern int tot_interfaces; /* # of remote and local interfaces */ 487 1.12 thorpej extern int rip_interfaces; /* # of interfaces doing RIP */ 488 1.12 thorpej extern struct interface *ifnet; /* all interfaces */ 489 1.14 christos extern struct interface *remote_if; /* remote interfaces */ 490 1.12 thorpej extern int have_ripv1_out; /* have a RIPv1 interface */ 491 1.12 thorpej extern int have_ripv1_in; 492 1.12 thorpej extern int need_flash; /* flash update needed */ 493 1.12 thorpej extern struct timeval need_kern; /* need to update kernel table */ 494 1.18 christos extern u_int update_seqno; /* a route has changed */ 495 1.12 thorpej 496 1.14 christos extern int tracelevel, new_tracelevel; 497 1.13 christos #define MAX_TRACELEVEL 4 498 1.13 christos #define TRACEKERNEL (tracelevel >= 4) /* log kernel changes */ 499 1.12 thorpej #define TRACECONTENTS (tracelevel >= 3) /* display packet contents */ 500 1.12 thorpej #define TRACEPACKETS (tracelevel >= 2) /* note packets */ 501 1.12 thorpej #define TRACEACTIONS (tracelevel != 0) 502 1.12 thorpej extern FILE *ftrace; /* output trace file */ 503 1.14 christos extern char inittracename[MAXPATHLEN+1]; 504 1.12 thorpej 505 1.12 thorpej extern struct radix_node_head *rhead; 506 1.12 thorpej 507 1.18 christos extern void fix_sock(int, const char *); 508 1.12 thorpej extern void fix_select(void); 509 1.12 thorpej extern void rip_off(void); 510 1.12 thorpej extern void rip_on(struct interface *); 511 1.12 thorpej 512 1.14 christos extern void bufinit(void); 513 1.14 christos extern int output(enum output_type, struct sockaddr_in *, 514 1.14 christos struct interface *, struct rip *, int); 515 1.14 christos extern void clr_ws_buf(struct ws_buf *, struct auth *); 516 1.12 thorpej extern void rip_query(void); 517 1.12 thorpej extern void rip_bcast(int); 518 1.12 thorpej extern void supply(struct sockaddr_in *, struct interface *, 519 1.14 christos enum output_type, int, int, int); 520 1.12 thorpej 521 1.18 christos extern void msglog(const char *, ...) PATTRIB(1,2); 522 1.14 christos struct msg_limit { 523 1.14 christos time_t reuse; 524 1.14 christos struct msg_sub { 525 1.14 christos naddr addr; 526 1.14 christos time_t until; 527 1.14 christos # define MSG_SUBJECT_N 8 528 1.14 christos } subs[MSG_SUBJECT_N]; 529 1.14 christos }; 530 1.18 christos extern void msglim(struct msg_limit *, naddr, 531 1.18 christos const char *, ...) PATTRIB(3,4); 532 1.12 thorpej #define LOGERR(msg) msglog(msg ": %s", strerror(errno)) 533 1.26 joerg __dead extern void logbad(int, const char *, ...) PATTRIB(2,3); 534 1.12 thorpej #define BADERR(dump,msg) logbad(dump,msg ": %s", strerror(errno)) 535 1.12 thorpej #ifdef DEBUG 536 1.12 thorpej #define DBGERR(dump,msg) BADERR(dump,msg) 537 1.12 thorpej #else 538 1.12 thorpej #define DBGERR(dump,msg) LOGERR(msg) 539 1.12 thorpej #endif 540 1.12 thorpej extern char *naddr_ntoa(naddr); 541 1.23 christos extern const char *saddr_ntoa(const struct sockaddr *); 542 1.12 thorpej 543 1.18 christos extern void *rtmalloc(size_t, const char *); 544 1.12 thorpej extern void timevaladd(struct timeval *, struct timeval *); 545 1.12 thorpej extern void intvl_random(struct timeval *, u_long, u_long); 546 1.12 thorpej extern int getnet(char *, naddr *, naddr *); 547 1.12 thorpej extern int gethost(char *, naddr *); 548 1.12 thorpej extern void gwkludge(void); 549 1.18 christos extern const char *parse_parms(char *, int); 550 1.18 christos extern const char *check_parms(struct parm *); 551 1.12 thorpej extern void get_parms(struct interface *); 552 1.12 thorpej 553 1.12 thorpej extern void lastlog(void); 554 1.16 thorpej extern void trace_close(int); 555 1.18 christos extern void set_tracefile(const char *, const char *, int); 556 1.18 christos extern void tracelevel_msg(const char *, int); 557 1.18 christos extern void trace_off(const char*, ...) PATTRIB(1,2); 558 1.14 christos extern void set_tracelevel(void); 559 1.12 thorpej extern void trace_flush(void); 560 1.18 christos extern void trace_misc(const char *, ...) PATTRIB(1,2); 561 1.18 christos extern void trace_act(const char *, ...) PATTRIB(1,2); 562 1.18 christos extern void trace_pkt(const char *, ...) PATTRIB(1,2); 563 1.18 christos extern void trace_add_del(const char *, struct rt_entry *); 564 1.16 thorpej extern void trace_change(struct rt_entry *, u_int, struct rt_spare *, 565 1.18 christos const char *); 566 1.18 christos extern void trace_if(const char *, struct interface *); 567 1.12 thorpej extern void trace_upslot(struct rt_entry *, struct rt_spare *, 568 1.16 thorpej struct rt_spare *); 569 1.18 christos extern void trace_rip(const char*, const char*, struct sockaddr_in *, 570 1.12 thorpej struct interface *, struct rip *, int); 571 1.12 thorpej extern char *addrname(naddr, naddr, int); 572 1.14 christos extern char *rtname(naddr, naddr, naddr); 573 1.12 thorpej 574 1.12 thorpej extern void rdisc_age(naddr); 575 1.12 thorpej extern void set_rdisc_mg(struct interface *, int); 576 1.12 thorpej extern void set_supplier(void); 577 1.12 thorpej extern void if_bad_rdisc(struct interface *); 578 1.12 thorpej extern void if_ok_rdisc(struct interface *); 579 1.12 thorpej extern void read_rip(int, struct interface *); 580 1.12 thorpej extern void read_rt(void); 581 1.12 thorpej extern void read_d(void); 582 1.12 thorpej extern void rdisc_adv(void); 583 1.12 thorpej extern void rdisc_sol(void); 584 1.12 thorpej 585 1.12 thorpej extern void sigalrm(int); 586 1.12 thorpej extern void sigterm(int); 587 1.12 thorpej 588 1.12 thorpej extern void sigtrace_on(int); 589 1.12 thorpej extern void sigtrace_off(int); 590 1.12 thorpej 591 1.12 thorpej extern void flush_kern(void); 592 1.12 thorpej extern void age(naddr); 593 1.12 thorpej 594 1.12 thorpej extern void ag_flush(naddr, naddr, void (*)(struct ag_info *)); 595 1.12 thorpej extern void ag_check(naddr, naddr, naddr, naddr, char, char, u_int, 596 1.12 thorpej u_short, u_short, void (*)(struct ag_info *)); 597 1.16 thorpej extern void del_static(naddr, naddr, naddr, int); 598 1.12 thorpej extern void del_redirects(naddr, time_t); 599 1.12 thorpej extern struct rt_entry *rtget(naddr, naddr); 600 1.12 thorpej extern struct rt_entry *rtfind(naddr); 601 1.12 thorpej extern void rtinit(void); 602 1.16 thorpej extern void rtadd(naddr, naddr, u_int, struct rt_spare *); 603 1.16 thorpej extern void rtchange(struct rt_entry *, u_int, struct rt_spare *, char *); 604 1.12 thorpej extern void rtdelete(struct rt_entry *); 605 1.14 christos extern void rts_delete(struct rt_entry *, struct rt_spare *); 606 1.12 thorpej extern void rtbad_sub(struct rt_entry *); 607 1.12 thorpej extern void rtswitch(struct rt_entry *, struct rt_spare *); 608 1.12 thorpej extern void rtbad(struct rt_entry *); 609 1.12 thorpej 610 1.24 christos #define S_ADDR(x) (((const struct sockaddr_in *)(x))->sin_addr.s_addr) 611 1.12 thorpej #define INFO_DST(I) ((I)->rti_info[RTAX_DST]) 612 1.12 thorpej #define INFO_GATE(I) ((I)->rti_info[RTAX_GATEWAY]) 613 1.12 thorpej #define INFO_MASK(I) ((I)->rti_info[RTAX_NETMASK]) 614 1.12 thorpej #define INFO_IFA(I) ((I)->rti_info[RTAX_IFA]) 615 1.12 thorpej #define INFO_IFP(I) ((I)->rti_info[RTAX_IFP]) 616 1.12 thorpej #define INFO_AUTHOR(I) ((I)->rti_info[RTAX_AUTHOR]) 617 1.12 thorpej #define INFO_BRD(I) ((I)->rti_info[RTAX_BRD]) 618 1.12 thorpej void rt_xaddrs(struct rt_addrinfo *, struct sockaddr *, struct sockaddr *, 619 1.12 thorpej int); 620 1.12 thorpej 621 1.12 thorpej extern naddr std_mask(naddr); 622 1.12 thorpej extern naddr ripv1_mask_net(naddr, struct interface *); 623 1.12 thorpej extern naddr ripv1_mask_host(naddr,struct interface *); 624 1.25 christos #define on_net_h(a,net,mask) ((((a) ^ (net)) & (mask)) == 0) 625 1.25 christos #define on_net(a,net,mask) on_net_h(ntohl(a),net,mask) 626 1.12 thorpej extern int check_dst(naddr); 627 1.14 christos extern struct interface *check_dup(naddr, naddr, naddr, int); 628 1.14 christos extern int check_remote(struct interface *); 629 1.15 lukem extern int addrouteforif(struct interface *); 630 1.12 thorpej extern void ifinit(void); 631 1.13 christos extern int walk_bad(struct radix_node *, struct walkarg *); 632 1.18 christos extern int if_ok(struct interface *, const char *); 633 1.12 thorpej extern void if_sick(struct interface *); 634 1.12 thorpej extern void if_bad(struct interface *); 635 1.14 christos extern void if_link(struct interface *); 636 1.12 thorpej extern struct interface *ifwithaddr(naddr, int, int); 637 1.12 thorpej extern struct interface *ifwithname(char *, naddr); 638 1.14 christos extern struct interface *ifwithindex(u_short, int); 639 1.12 thorpej extern struct interface *iflookup(naddr); 640 1.14 christos 641 1.14 christos extern struct auth *find_auth(struct interface *); 642 1.14 christos extern void end_md5_auth(struct ws_buf *, struct auth *); 643 1.14 christos 644 1.20 christos #if defined(__FreeBSD__) || defined(__NetBSD__) 645 1.20 christos #include <md5.h> 646 1.20 christos #else 647 1.14 christos #define MD5_DIGEST_LEN 16 648 1.14 christos typedef struct { 649 1.14 christos u_int32_t state[4]; /* state (ABCD) */ 650 1.14 christos u_int32_t count[2]; /* # of bits, modulo 2^64 (LSB 1st) */ 651 1.14 christos unsigned char buffer[64]; /* input buffer */ 652 1.14 christos } MD5_CTX; 653 1.14 christos extern void MD5Init(MD5_CTX*); 654 1.14 christos extern void MD5Update(MD5_CTX*, u_char*, u_int); 655 1.14 christos extern void MD5Final(u_char[MD5_DIGEST_LEN], MD5_CTX*); 656 1.20 christos #endif 657