diff options
Diffstat (limited to 'usr.sbin/routed/defs.h')
| -rw-r--r-- | usr.sbin/routed/defs.h | 542 |
1 files changed, 542 insertions, 0 deletions
diff --git a/usr.sbin/routed/defs.h b/usr.sbin/routed/defs.h new file mode 100644 index 000000000000..02ac4c249f76 --- /dev/null +++ b/usr.sbin/routed/defs.h @@ -0,0 +1,542 @@ +/* + * Copyright (c) 1983, 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)defs.h 8.1 (Berkeley) 6/5/93 + */ + +#ident "$Revision: 1.1 $" + +/* Definitions for RIPv2 routing process. + * + * This code is based on the 4.4BSD `routed` daemon, with extensions to + * support: + * RIPv2, including variable length subnet masks. + * Router Discovery + * aggregate routes in the kernel tables. + * aggregate advertised routes. + * maintain spare routes for faster selection of another gateway + * when the current gateway dies. + * timers on routes with second granularity so that selection + * of a new route does not wait 30-60 seconds. + * tolerance of static routes. + * tell the kernel hop counts + * do not advertise if ipforwarding=0 + * + * The vestigual support for other protocols has been removed. There + * is no likelihood that IETF RIPv1 or RIPv2 will ever be used with + * other protocols. The result is far smaller, faster, cleaner, and + * perhaps understandable. + * + * The accumulation of special flags and kludges added over the many + * years have been simplified and integrated. + */ + +#include <stdio.h> +#include <netdb.h> +#include <stdlib.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#ifdef sgi +#include <strings.h> +#include <bstring.h> +#endif +#include <stdarg.h> +#include <syslog.h> +#include <time.h> +#include <sys/types.h> +#include <sys/param.h> +#include <sys/ioctl.h> +#include <sys/sysctl.h> +#include <sys/socket.h> +#include <net/if.h> +#include <net/route.h> +#include <net/radix.h> +#ifndef sgi +struct walkarg; +#endif +#include <net/if_dl.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#define RIPVERSION RIPv2 +#include <protocols/routed.h> + +/* Type of an IP address. + * Some systems do not like to pass structures, so do not use in_addr. + * Some systems think a long has 64 bits, which would be a gross waste. + * So define it here so it can be changed for the target system. + * It should be defined somewhere netinet/in.h, but it is not. + */ +#ifdef sgi +#define naddr __uint32_t +#else +#define naddr u_long +#define _HAVE_SA_LEN +#define _HAVE_SIN_LEN +#endif + +#ifdef sgi +/* Turn on if IP_DROP_MEMBERSHIP and IP_ADD_MEMBERSHIP do not look at + * the dstaddr of point-to-point interfaces. + */ +#define MCAST_PPP_BUG +#endif + +#define NEVER (24*60*60) /* a long time */ +#define EPOCH NEVER /* bias time by this to avoid <0 */ + +/* Scan the kernel regularly to see if any interfaces have appeared or been + * turned off. These must be less than STALE_TIME. + */ +#define CHECK_BAD_INTERVAL 5 /* when an interface is known bad */ +#define CHECK_ACT_INTERVAL 30 /* when advertising */ +#define CHECK_QUIET_INTERVAL 300 /* when not */ + + +/* set times to this to continue poisoning a route */ +#define POISON_SECS (GARBAGE_TIME - POISON_TIME) + +#define NET_S_METRIC 1 /* metric used on synthetic routes */ + +#define LIM_SEC(s,l) ((s).tv_sec = MIN((s).tv_sec, (l))) + + +/* Router Discovery parameters */ +#ifndef sgi +#define INADDR_ALLROUTERS_GROUP 0xe0000002 /* 224.0.0.2 */ +#endif +#define MaxMaxAdvertiseInterval 1800 +#define MinMaxAdvertiseInterval 4 +#define DefMaxAdvertiseInterval 600 +#define DEF_PreferenceLevel 0 +#define MIN_PreferenceLevel 0x80000000 + +#define MAX_INITIAL_ADVERT_INTERVAL 16 +#define MAX_INITIAL_ADVERTS 3 +#define MAX_RESPONSE_DELAY 2 + +#define MAX_SOLICITATION_DELAY 1 +#define SOLICITATION_INTERVAL 3 +#define MAX_SOLICITATIONS 3 + + +/* typical packet buffers */ +union pkt_buf { + char packet[MAXPACKETSIZE+1]; + struct rip rip; +}; + + +/* Main, daemon routing table structure + */ +struct rt_entry { + struct radix_node rt_nodes[2]; /* radix tree glue */ + u_int rt_state; +# define RS_IF 0x001 /* for network interface */ +# define RS_NET_SUB 0x002 /* fake net route for subnet */ +# define RS_NET_HOST 0x004 /* fake net route for host */ +# define RS_NET_INT 0x008 /* authority route */ +# define RS_NET_S (RS_NET_SUB | RS_NET_HOST | RS_NET_INT) +# define RS_SUBNET 0x010 /* subnet route from any source */ +# define RS_LOCAL 0x020 /* loopback for pt-to-pt */ +# define RS_MHOME 0x040 /* from -m */ +# define RS_GW 0x080 /* from -g */ +# define RS_STATIC 0x100 /* from the kernel */ +# define RS_RDISC 0x200 /* from router discovery */ + struct sockaddr_in rt_dst_sock; + naddr rt_mask; + struct rt_spare { + struct interface *rts_ifp; + naddr rts_gate; /* forward packets here */ + naddr rts_router; /* on the authority of this router */ + char rts_metric; + u_short rts_tag; + time_t rts_time; /* timer to junk stale routes */ +#define NUM_SPARES 4 + } rt_spares[NUM_SPARES]; + u_int rt_seqno; /* when last changed */ + char rt_hold_metric; + time_t rt_hold_down; +}; +#define rt_dst rt_dst_sock.sin_addr.s_addr +#define rt_ifp rt_spares[0].rts_ifp +#define rt_gate rt_spares[0].rts_gate +#define rt_router rt_spares[0].rts_router +#define rt_metric rt_spares[0].rts_metric +#define rt_tag rt_spares[0].rts_tag +#define rt_time rt_spares[0].rts_time + +#define HOST_MASK 0xffffffff +#define RT_ISHOST(rt) ((rt)->rt_mask == HOST_MASK) + +/* age all routes that + * are not from -g, -m, or static routes from the kernel + * not unbroken interface routes + * but not broken interfaces + * nor non-passive, remote interfaces that are not aliases + * (i.e. remote & metric=0) + */ +#define AGE_RT(rt,ifp) (0 == ((rt)->rt_state & (RS_GW | RS_MHOME | RS_STATIC \ + | RS_NET_SUB | RS_NET_HOST \ + | RS_RDISC)) \ + && (!((rt)->rt_state & RS_IF) \ + || (ifp) == 0 \ + || (((ifp)->int_state & IS_REMOTE) \ + && !((ifp)->int_state & IS_PASSIVE)))) + +/* true if A is better than B + * Better if + * - A is not a poisoned route + * - and A is not stale + * - and A has a shorter path + * - or is the router speaking for itself + * - or the current route is equal but stale + */ +#define BETTER_LINK(A, B) ((A)->rts_metric != HOPCNT_INFINITY \ + && now_stale <= (A)->rts_time \ + && ((A)->rts_metric < (B)->rts_metric \ + || ((A)->rts_gate == (A)->rts_router \ + && (B)->rts_gate != (B)->rts_router) \ + || ((A)->rts_metric == (B)->rts_metric \ + && now_stale > (B)->rts_time))) + + +/* An "interface" is similar to a kernel ifnet structure, except it also + * handles "logical" or "IS_REMOTE" interfaces (remote gateways). + */ +struct interface { + struct interface *int_next, *int_prev; + char int_name[IFNAMSIZ+15+1]; /* big enough for IS_REMOTE */ + u_short int_index; + naddr int_addr; /* address on this host (net order) */ + naddr int_brdaddr; /* broadcast address (n) */ + naddr int_dstaddr; /* other end of pt-to-pt link (n) */ + naddr int_net; /* working network # (host order)*/ + naddr int_mask; /* working net mask (host order) */ + naddr int_std_addr; /* class A/B/C address (n) */ + naddr int_std_net; /* class A/B/C network (h) */ + naddr int_std_mask; /* class A/B/C netmask (h) */ + naddr int_host_addr; /* RIPv1 net for pt-to-pt link (h) */ + naddr int_host_mask; /* RIPv1 mask for pt-to-pt (h) */ + int int_rip_sock; /* for queries */ + int int_if_flags; /* copied from kernel */ + u_int int_state; + time_t int_act_time; /* last thought healthy */ + time_t int_quiet_time; /* last inactive */ + u_short int_transitions; /* times gone up-down */ + char int_metric; + char int_d_metric; /* for faked default route */ + u_int int_data_ipackets; /* previous network stats */ + u_int int_data_ierrors; + u_int int_data_opackets; + u_int int_data_oerrors; +#ifdef sgi + u_int int_data_odrops; +#endif + time_t int_data_ts; /* timestamp on network stats */ + char int_passwd[RIP_AUTH_PW_LEN]; /* RIPv2 password */ + int int_rdisc_pref; /* advertised rdisc preference */ + int int_rdisc_int; /* MaxAdvertiseInterval */ + int int_rdisc_cnt; + struct timeval int_rdisc_timer; +}; + +#define IS_ALIAS 0x0000001 /* interface alias */ +#define IS_SUBNET 0x0000002 /* interface on subnetted network */ +#define IS_REMOTE 0x0000004 /* interface is not on this machine */ +#define IS_PASSIVE 0x0000008 /* remote and does not do RIP */ +#define IS_EXTERNAL 0x0000010 /* handled by EGP or something */ +#define IS_CHECKED 0x0000020 /* still exists */ +#define IS_ALL_HOSTS 0x0000040 /* in INADDR_ALLHOSTS_GROUP */ +#define IS_ALL_ROUTERS 0x0000080 /* in INADDR_ALLROUTERS_GROUP */ +#define IS_RIP_QUERIED 0x0000100 /* query broadcast */ +#define IS_BROKE 0x0000200 /* seems to be broken */ +#define IS_ACTIVE 0x0000400 /* heard from it at least once */ +#define IS_QUIET 0x0000800 /* have not heard from it recently */ +#define IS_NEED_NET_SUB 0x0001000 /* need RS_NET_SUB route */ +#define IS_NO_AG 0x0002000 /* do not aggregate subnets */ +#define IS_NO_SUPER_AG 0x0004000 /* do not aggregate networks */ +#define IS_NO_RIPV1_IN 0x0008000 /* no RIPv1 input at all */ +#define IS_NO_RIPV2_IN 0x0010000 /* no RIPv2 input at all */ +#define IS_NO_RIP_IN (IS_NO_RIPV2_IN | IS_NO_RIPV2_IN) +#define IS_NO_RIPV1_OUT 0x0020000 /* no RIPv1 output at all */ +#define IS_NO_RIPV2_OUT 0x0040000 /* no RIPv2 output at all */ +#define IS_NO_RIP_OUT (IS_NO_RIPV1_OUT | IS_NO_RIPV2_OUT) +#define IS_NO_ADV_IN 0x0080000 +#define IS_NO_SOL_OUT 0x0100000 /* no solicitations */ +#define IS_SOL_OUT 0x0200000 /* send solicitations */ +#define GROUP_IS_SOL (IS_NO_ADV_IN|IS_NO_SOL_OUT) +#define IS_NO_ADV_OUT 0x0400000 /* do not advertise rdisc */ +#define IS_ADV_OUT 0x0800000 /* advertise rdisc */ +#define GROUP_IS_ADV (IS_NO_ADV_OUT|IS_ADV_OUT) +#define IS_BCAST_RDISC 0x1000000 /* broadcast instead of multicast */ + +#ifdef sgi +#define IFF_UP_RUNNING (IFF_RUNNING|IFF_UP) +#else +#define IFF_UP_RUNNING IFF_UP +#endif +#define iff_alive(f) (((f) & IFF_UP_RUNNING) == IFF_UP_RUNNING) + + +/* Information for aggregating routes */ +#define NUM_AG_SLOTS 32 +struct ag_info { + struct ag_info *ag_fine; /* slot with finer netmask */ + struct ag_info *ag_cors; /* more coarse netmask */ + naddr ag_dst_h; /* destination in host byte order */ + naddr ag_mask; + naddr ag_gate; + char ag_metric; /* metric to be advertised */ + char ag_pref; /* aggregate based on this */ + u_int ag_seqno; + u_short ag_tag; + u_short ag_state; +#define AGS_SUPPRESS 0x01 /* combine with coaser mask */ +#define AGS_PROMOTE 0x002 /* synthesize combined routes */ +#define AGS_REDUN0 0x004 /* redundant, finer routes output */ +#define AGS_REDUN1 0x008 +#define AG_IS_REDUN(state) (((state) & (AGS_REDUN0 | AGS_REDUN1)) \ + == (AGS_REDUN0 | AGS_REDUN1)) +#define AGS_GATEWAY 0x010 /* tell kernel RTF_GATEWAY */ +#define AGS_RIPV2 0x020 /* send only as RIPv2 */ +#define AGS_DEAD 0x080 /* dead--ignore differing gate */ +#define AGS_RDISC 0x100 /* suppresses most routes */ +}; + + +/* parameters for interfaces */ +extern struct parm { + struct parm *parm_next; + char parm_name[IFNAMSIZ+1]; + naddr parm_a_h; + naddr parm_m; + + char parm_d_metric; + u_int parm_int_state; + int parm_rdisc_pref; + int parm_rdisc_int; + char parm_passwd[RIP_AUTH_PW_LEN+1]; +} *parms; + +/* authority for internal networks */ +extern struct intnet { + struct intnet *intnet_next; + naddr intnet_addr; + naddr intnet_mask; +} *intnets; + + + +extern pid_t mypid; +extern naddr myaddr; /* main address of this system */ + +extern int stopint; /* !=0 to stop */ + +extern int sock_max; +extern int rip_sock; /* RIP socket */ +extern struct interface *rip_sock_mcast; /* current multicast interface */ +extern int rt_sock; /* routing socket */ +extern int rt_sock_seqno; +extern int rdisc_sock; /* router-discovery raw socket */ + +extern int seqno; /* sequence number for messages */ +extern int supplier; /* process should supply updates */ +extern int default_gateway; /* 1=advertise default */ +extern int lookforinterfaces; /* 1=probe for new up interfaces */ +extern int supplier_set; /* -s or -q requested */ +extern int ridhosts; /* 1=reduce host routes */ +extern int ppp_noage; /* 1=do not age quiet link routes */ +extern int mhome; /* 1=want multi-homed host route */ +extern int advertise_mhome; /* 1=must continue adverising it */ +extern int auth_ok; /* 1=ignore auth if we do not care */ + +extern struct timeval epoch; /* when started */ +extern struct timeval now; /* current idea of time */ +extern time_t now_stale; +extern time_t now_garbage; + +extern struct timeval next_bcast; /* next general broadcast */ +extern struct timeval age_timer; /* next check of old routes */ +extern struct timeval no_flash; /* inhibit flash update until then */ +extern struct timeval rdisc_timer; /* next advert. or solicitation */ +extern int rdisc_ok; /* using solicited route */ + +extern struct timeval ifinit_timer; /* time to check interfaces */ + +extern naddr loopaddr; /* our address on loopback */ +extern int tot_interfaces; /* # of remote and local interfaces */ +extern int rip_interfaces; /* # of interfaces doing RIP */ +extern struct interface *ifnet; /* all interfaces */ +extern int have_ripv1; /* have a RIPv1 interface */ +extern int need_flash; /* flash update needed */ +extern struct timeval need_kern; /* need to update kernel table */ +extern int update_seqno; /* a route has changed */ + +extern u_int tracelevel, new_tracelevel; +#define MAX_TRACELEVEL 3 +#define TRACEPACKETS (tracelevel >= 2) /* note packets */ +#define TRACECONTENTS (tracelevel >= 3) /* display packet contents */ +#define TRACEACTIONS (tracelevel != 0) +extern FILE *ftrace; /* output trace file */ + +extern struct radix_node_head *rhead; + + +#ifdef sgi +/* Fix conflicts */ +#define dup2(x,y) BSDdup2(x,y) +#endif /* sgi */ + +extern void fix_sock(int, char *); +extern void fix_select(void); +extern void rip_off(void); +extern void rip_on(struct interface *); + +enum output_type {OUT_QUERY, OUT_UNICAST, OUT_BROADCAST, OUT_MULTICAST}; +extern int output(enum output_type, struct sockaddr_in *, + struct interface *, struct rip *, int); +extern void rip_query(void); +extern void rip_bcast(int); +extern void supply(struct sockaddr_in *, struct interface *, + enum output_type, int, int); + +extern void msglog(char *, ...); +#define LOGERR(msg) msglog(msg ": %s", strerror(errno)) +extern void logbad(int, char *, ...); +#define BADERR(dump,msg) logbad(dump,msg ": %s", strerror(errno)) +#ifdef DEBUG +#define DBGERR(dump,msg) BADERR(dump,msg) +#else +#define DBGERR(dump,msg) LOGERR(msg) +#endif +#ifdef MCAST_PPP_BUG +extern void mcasterr(struct interface *, int, char *); +#define MCASTERR(ifp,dump,msg) mcasterr(ifp, dump, "setsockopt(IP_"msg")") +#else +#define MCASTERR(ifp, dump,msg) DBGERR(dump,"setsockopt(IP_" msg ")") +#endif +extern char *naddr_ntoa(naddr); +extern char *saddr_ntoa(struct sockaddr *); + +extern void timevaladd(struct timeval *, struct timeval *); +extern void intvl_random(struct timeval *, u_long, u_long); +extern int getnet(char *, naddr *, naddr *); +extern int gethost(char *, naddr *); +extern void gwkludge(void); +extern char *parse_parms(char *); +extern void get_parms(struct interface *); + +extern void lastlog(void); +extern void trace_on(char *, int); +extern void trace_off(char*, char*); +extern void trace_flush(void); +extern void set_tracelevel(void); +extern void trace_msg(char *, ...); +extern void trace_add_del(char *, struct rt_entry *); +extern void trace_change(struct rt_entry *, u_int, naddr, naddr, int, + u_short, struct interface *, time_t, char *); +extern void trace_if(char *, struct interface *); +extern void trace_upslot(struct rt_entry *, struct rt_spare *, + naddr, naddr, + struct interface *, int, u_short, time_t); +extern void trace_rip(char*, char*, struct sockaddr_in *, + struct interface *, struct rip *, int); +extern char *addrname(naddr, naddr, int); + +extern void rdisc_age(naddr); +extern void set_rdisc_mg(struct interface *, int); +extern void set_supplier(void); +extern void ifbad_rdisc(struct interface *); +extern void ifok_rdisc(struct interface *); +extern void read_rip(int, struct interface *); +extern void read_rt(void); +extern void read_d(void); +extern void rdisc_adv(void); +extern void rdisc_sol(void); + +extern void sigalrm(int); +extern void sigterm(int); + +extern void sigtrace_on(int); +extern void sigtrace_off(int); + +extern void fix_kern(void); +extern void flush_kern(void); +extern void age(naddr); + +extern void ag_flush(naddr, naddr, void (*)(struct ag_info *)); +extern void ag_check(naddr, naddr, naddr, char, char, u_int, + u_short, u_short, void (*)(struct ag_info *)); +extern void del_static(naddr, naddr, int); +extern void del_redirects(naddr, time_t); +extern struct rt_entry *rtget(naddr, naddr); +extern struct rt_entry *rtfind(naddr); +extern void rtinit(void); +extern void rtadd(naddr, naddr, naddr, naddr, + int, u_short, u_int, struct interface *); +extern void rtchange(struct rt_entry *, u_int, naddr,naddr, int, u_short, + struct interface *ifp, time_t, char *); +extern void rtdelete(struct rt_entry *); +extern void rtbad_sub(struct rt_entry *); +extern void rtswitch(struct rt_entry *, struct rt_spare *); +extern void rtbad(struct rt_entry *); + + +extern struct rt_addrinfo rtinfo; +#define S_ADDR(x) (((struct sockaddr_in *)(x))->sin_addr.s_addr) +#define RTINFO_DST rtinfo.rti_info[RTAX_DST] +#define RTINFO_GATE rtinfo.rti_info[RTAX_GATEWAY] +#define RTINFO_NETMASK rtinfo.rti_info[RTAX_NETMASK] +#define RTINFO_IFA rtinfo.rti_info[RTAX_IFA] +#define RTINFO_AUTHOR rtinfo.rti_info[RTAX_AUTHOR] +#define RTINFO_BRD rtinfo.rti_info[RTAX_BRD] +#define RTINFO_IFP ((struct sockaddr_dl *)rtinfo.rti_info[RTAX_IFP]) +void rt_xaddrs(struct sockaddr *, struct sockaddr *, int); + +extern naddr std_mask(naddr); +extern naddr ripv1_mask_net(naddr, struct interface *, struct interface *); +extern naddr ripv1_mask_host(naddr,struct interface *, struct interface *); +#define on_net(tgt, net, mask) ((ntohl(tgt) & mask) == (net & mask)) +extern int check_dst(naddr); +#ifdef sgi +extern int sysctl(int *, u_int, void *, size_t *, void *, size_t); +#endif +extern void addrouteforif(register struct interface *); +extern void ifinit(void); +extern int walk_bad(struct radix_node *, struct walkarg *); +extern int ifok(struct interface *, char *); +extern void ifbad(struct interface *, char *); +extern struct interface *ifwithaddr(naddr, int, int); +extern struct interface *ifwithname(char *, naddr); +extern struct interface *ifwithindex(u_short); +extern struct interface *iflookup(naddr); |