Ejemplo n.º 1
0
void add_ptopt_localrt(struct interface *ifp)
{
    struct rt_entry *rt;
    struct sockaddr *dst;
    struct sockaddr_in net;
    int state;

    state = RTS_INTERFACE | RTS_PASSIVE;

    /* look for route to logical network */
    memset(&net, 0, sizeof (net));
    net.sin_family = AF_INET;
    net.sin_addr = inet_makeaddr(ifp->int_net, INADDR_ANY);
    dst = (struct sockaddr *)&net;
    rt = rtfind(dst);
    if (rt && rt->rt_state & RTS_INTERNAL)
        state |= RTS_SUBNET;

    dst = &ifp->int_addr;
    if ((rt = rtfind(dst))!=NULL) {
        if (rt && rt->rt_state & RTS_INTERFACE)
            return;
        rtdelete(rt);
    }
    rtadd(dst, &loopaddr, 1, state);
}
Ejemplo n.º 2
0
void addrouteforif(struct interface *ifp)
{
    struct sockaddr_in net;
    struct sockaddr *dst;
    int state;
    struct rt_entry *rt;

    if (ifp->int_flags & IFF_POINTOPOINT)
        dst = &ifp->int_dstaddr;
    else {
        memset(&net, 0, sizeof (net));
        net.sin_family = AF_INET;
        net.sin_addr = inet_makeaddr(ifp->int_subnet, INADDR_ANY);
        dst = (struct sockaddr *)&net;
    }
    rt = rtfind(dst);
    if (rt &&
            (rt->rt_state & (RTS_INTERFACE | RTS_INTERNAL)) == RTS_INTERFACE)
        return;
    if (rt)
        rtdelete(rt);
    /*
     * If interface on subnetted network,
     * install route to network as well.
     * This is meant for external viewers.
     */
    if ((ifp->int_flags & (IFF_SUBNET|IFF_POINTOPOINT)) == IFF_SUBNET) {
        struct in_addr subnet;

        subnet = net.sin_addr;
        net.sin_addr = inet_makeaddr(ifp->int_net, INADDR_ANY);
        rt = rtfind(dst);
        if (rt == 0)
            rtadd(dst, &ifp->int_addr, ifp->int_metric,
                  ((ifp->int_flags & (IFF_INTERFACE|IFF_REMOTE)) |
                   RTS_PASSIVE | RTS_INTERNAL | RTS_SUBNET));
        else if ((rt->rt_state & (RTS_INTERNAL|RTS_SUBNET)) ==
                 (RTS_INTERNAL|RTS_SUBNET) &&
                 ifp->int_metric < rt->rt_metric)
            rtchange(rt, &rt->rt_router, ifp->int_metric);
        net.sin_addr = subnet;
    }
    if (ifp->int_transitions++ > 0)
        syslog(LOG_ERR, "re-installing interface %s", ifp->int_name);
    state = ifp->int_flags &
            (IFF_INTERFACE | IFF_PASSIVE | IFF_REMOTE | IFF_SUBNET);
    if (ifp->int_flags & IFF_POINTOPOINT &&
            (ntohl(((struct sockaddr_in *)&ifp->int_dstaddr)->sin_addr.s_addr) &
             ifp->int_netmask) != ifp->int_net)
        state &= ~RTS_SUBNET;
    if (ifp->int_flags & IFF_LOOPBACK)
        state |= RTS_EXTERNAL;
    rtadd(dst, &ifp->int_addr, ifp->int_metric, state);
    if (ifp->int_flags & IFF_POINTOPOINT && foundloopback)
        add_ptopt_localrt(ifp);
}
Ejemplo n.º 3
0
void timer(int signum)
{
	register struct rthash *rh;
	register struct rt_entry *rt;
	struct rthash *base = hosthash;
	int doinghost = 1, timetobroadcast;

	(void)signum;

	(void) gettimeofday(&now, (struct timezone *)NULL);
	faketime += TIMER_RATE;
	if (lookforinterfaces && (faketime % CHECK_INTERVAL) == 0)
		ifinit();
	timetobroadcast = supplier && (faketime % SUPPLY_INTERVAL) == 0;
again:
	for (rh = base; rh < &base[ROUTEHASHSIZ]; rh++) {
		rt = rh->rt_forw;
		for (; rt != (struct rt_entry *)rh; rt = rt->rt_forw) {
			/*
			 * We don't advance time on a routing entry for
			 * a passive gateway, or any interface if we're
			 * not acting as supplier.
			 */
			if (!(rt->rt_state & RTS_PASSIVE) &&
			    (supplier || !(rt->rt_state & RTS_INTERFACE)))
				rt->rt_timer += TIMER_RATE;
			if (rt->rt_timer >= GARBAGE_TIME) {
				rt = rt->rt_back;
				rtdelete(rt->rt_forw);
				continue;
			}
			if (rt->rt_timer >= EXPIRE_TIME &&
			    rt->rt_metric < HOPCNT_INFINITY)
				rtchange(rt, &rt->rt_router, HOPCNT_INFINITY);
			rt->rt_state &= ~RTS_CHANGED;
		}
	}
	if (doinghost) {
		doinghost = 0;
		base = nethash;
		goto again;
	}
	if (timetobroadcast) {
		toall(supply, 0, (struct interface *)NULL);
		lastbcast = now;
		lastfullupdate = now;
		needupdate = 0;		/* cancel any pending dynamic update */
		nextbcast.tv_sec = 0;
	}
#ifdef EMBED
	signal(signum, timer);
#endif
}
Ejemplo n.º 4
0
void
addrouteforif(struct interface *ifp)
{
	struct sockaddr_ipx net;
	struct sockaddr *dst;
	struct rt_entry *rt;

	if (ifp->int_flags & IFF_POINTOPOINT) {
		int (*match)();
		struct interface *ifp2 = ifnet;
		
		dst = &ifp->int_dstaddr;

		/* Search for interfaces with the same net */
		ifp->int_sq.n = ifp->int_sq.p = &(ifp->int_sq);
		match = afswitch[dst->sa_family].af_netmatch;
		if (match)
		for (ifp2 = ifnet; ifp2; ifp2 =ifp2->int_next) {
			if ((ifp->int_flags & IFF_POINTOPOINT) == 0)
				continue;
			if ((*match)(&ifp2->int_dstaddr,&ifp->int_dstaddr)) {
				insque(&ifp2->int_sq,&ifp->int_sq);
				break;
			}
		}
	} else {
		bzero(&net, sizeof(net));
		net.sipx_family = AF_IPX;
		net.sipx_len = sizeof (net);
		net.sipx_addr.x_net = satoipx_addr(ifp->int_broadaddr).x_net;
		dst = (struct sockaddr *)&net;
	}
	rt = rtlookup(dst);
	if (rt)
		rtdelete(rt);
	if (tracing)
		fprintf(stderr, "Adding route to interface %s\n", ifp->int_name);
	if (ifp->int_transitions++ > 0)
		syslog(LOG_ERR, "re-installing interface %s", ifp->int_name);
	rtadd(dst, &ifp->int_addr, ifp->int_metric, 0,
		ifp->int_flags & (IFF_INTERFACE|IFF_PASSIVE|IFF_REMOTE));
}
Ejemplo n.º 5
0
static void
addrouteforif(struct interface *ifp)
{
	struct rt_entry *rt;
	struct in6_addr *dst;

	if (ifp->int_flags & RIP6_IFF_POINTOPOINT)
		dst = &ifp->int_dstaddr;
	else
		dst = &ifp->int_addr;

	rt = rtlookup(dst, ifp->int_prefix_length);

	if (rt != NULL) {
		if (rt->rt_state & RTS_INTERFACE)
			return;
		rtdelete(rt);
	}
	rtadd(dst, &ifp->int_addr, ifp->int_prefix_length, ifp->int_metric, 0,
	    _B_TRUE, ifp);
}
Ejemplo n.º 6
0
/*
 * Timer routine.  Performs routing information supply
 * duties and manages timers on routing and SAP table entries.
 */
void
timer(void)
{
	struct rthash *rh;
	struct rt_entry *rt;
	struct sap_hash *sh;
	struct sap_entry *sap;
	struct sap_hash *sap_base = sap_head;
	int timetobroadcast, ripbroadcast, sapbroadcast;

	timeval += TIMER_RATE;
	if (lookforinterfaces && (timeval % CHECK_INTERVAL) == 0)
		ifinit();
	timetobroadcast = supplier && (timeval % SUPPLY_INTERVAL) == 0;
	ripbroadcast = supplier && timetobroadcast && 
			(timeval % RIP_INTERVAL) == 0;
	sapbroadcast = timetobroadcast && dosap && !ripbroadcast;

	for (rh = nethash; rh < &nethash[ROUTEHASHSIZ]; rh++) {
		rt = rh->rt_forw;
		for (; rt != (struct rt_entry *)rh; rt = rt->rt_forw) {
			if (rt->rt_clone) {
				struct rt_entry *trt, *prt;
				/*
				 * If a clone expire free it and mark the
				 * main route RTS_CHANGED.
				 */
				prt = rt;
				trt = rt->rt_clone;
				while (trt) {
					trt->rt_timer += TIMER_RATE;
					if (trt->rt_timer >= EXPIRE_TIME) {
						prt->rt_clone = trt->rt_clone;
						free((char *)trt);
						trt = prt->rt_clone;
						rt->rt_state |= RTS_CHANGED;
					} else {
						prt = trt;
						trt = prt->rt_clone;
					}
				}
			}
			/*
			 * We don't advance time on a routing entry for
			 * a passive gateway or that for our only interface. 
			 * The latter is excused because we don't act as
			 * a routing information supplier and hence would
			 * time it out.  This is fair as if it's down
			 * we're cut off from the world anyway and it's
			 * not likely we'll grow any new hardware in
			 * the mean time.
			 */
			if (!(rt->rt_state & RTS_PASSIVE) &&
			    !(rt->rt_state & RTS_INTERFACE))
				rt->rt_timer += TIMER_RATE;
			if (rt->rt_timer >= EXPIRE_TIME) {
				rt->rt_metric = HOPCNT_INFINITY;
				rt->rt_state |= RTS_CHANGED;
			}
			if (rt->rt_timer >= GARBAGE_TIME) {
				rt = rt->rt_back;
				/* Perhaps we should send a REQUEST for this route? */
				rtdelete(rt->rt_forw);
				continue;
			}
			if (rt->rt_state & RTS_CHANGED) {
				rt->rt_state &= ~RTS_CHANGED;
				/* don't send extraneous packets */
				if (!supplier || ripbroadcast)
					continue;
				if ((rt->rt_metric + 1) == HOPCNT_INFINITY)
					continue;
				msg->rip_cmd = htons(RIPCMD_RESPONSE);
				msg->rip_nets[0].rip_dst =
					(satoipx_addr(rt->rt_dst)).x_net;
				msg->rip_nets[0].rip_metric =
				   	htons(min(rt->rt_metric+1, HOPCNT_INFINITY));
				msg->rip_nets[0].rip_ticks = 
					htons(rt->rt_ticks + 1);
				toall(sndmsg, rt, 0);
			}
		}
	}
	if (ripbroadcast)
		toall(supply, NULL, 0);

	/* 
	 * Now do the SAP stuff.
	 */
	for (sh = sap_base; sh < &sap_base[SAPHASHSIZ]; sh++) {
		sap = sh->forw;
		for (; sap != (struct sap_entry *)sh; sap = sap->forw) {
			if (sap->clone) {
				struct sap_entry *tsap, *psap;
				/*
				 * If a clone expire free it and mark the
				 * main sap entry RTS_CHANGED.
				 */
				psap = sap;
				tsap = sap->clone;
				while (tsap) {
					tsap->timer += TIMER_RATE;
					if (tsap->timer >= EXPIRE_TIME) {
						psap->clone = tsap->clone;
						free((char *)tsap);
						tsap = psap->clone;
						sap->state |= RTS_CHANGED;
					} else {
						psap = tsap;
						tsap = psap->clone;
					}
				}
			}
			sap->timer += TIMER_RATE;
			if (sap->timer >= EXPIRE_TIME) {
				sap->sap.hops = htons(HOPCNT_INFINITY);
				sap->state |= RTS_CHANGED;
			}
			if (sap->timer >= GARBAGE_TIME) {
				sap = sap->back;
				/* Perhaps we should send a REQUEST for this route? */
				sap_delete(sap->forw);
				continue;
			}
			/*
			 * XXX sap_sndmsg on RTS_CHANGED
			 */
			if (sap->state & RTS_CHANGED) {
				sap->state &= ~RTS_CHANGED;
#ifdef notyet
				/* don't send extraneous packets */
				if (!supplier || sapbroadcast)
					continue;
				if ((ntohs(sap->sap.hops) + 1) == HOPCNT_INFINITY)
					continue;
				sap_msg->sap_cmd = htons(SAP_RESP);
				sap_msg->sap[0] = sap->sap;
				sap_msg->sap[0].hops =
				    htons(min(sap->sap.hops+1, HOPCNT_INFINITY));
				toall(sapsndmsg, rt, 0);
#endif
			}
		}
	}
	if (sapbroadcast)
		sap_supply_toall(0);
	if (ftrace && sapbroadcast)
		dumpsaptable(ftrace, sap_head);
}