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      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