C++ rt_mask函数代码示例

static void
p_rtentry(struct rtentry *rt)
{
	static struct ifnet ifnet, *lastif;
	struct rtentry parent;
	static char buffer[128];
	static char prettyname[128];
	struct sockaddr *sa;
	sa_u addr, mask;

	/*
	 * Don't print protocol-cloned routes unless -a.
	 */
	if (rt->rt_flags & RTF_WASCLONED && !aflag) {
		kget(rt->rt_parent, parent);
		if (parent.rt_flags & RTF_PRCLONING)
			return;
	}

	bzero(&addr, sizeof(addr));
	if ((sa = kgetsa(rt_key(rt))))
		bcopy(sa, &addr, sa->sa_len);
	bzero(&mask, sizeof(mask));
	if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
		bcopy(sa, &mask, sa->sa_len);
	p_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags, wid_dst);
	p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, wid_gw);
	snprintf(buffer, sizeof(buffer), "%%-%d.%ds ", wid_flags, wid_flags);
	p_flags(rt->rt_flags, buffer);
	if (addr.u_sa.sa_family == AF_INET || Wflag) {
		printf("%*ld %*lu ", wid_refs, rt->rt_refcnt,
				     wid_use, rt->rt_use);
		if (Wflag) {
			if (rt->rt_rmx.rmx_mtu != 0)
				printf("%*lu ", wid_mtu, rt->rt_rmx.rmx_mtu);
			else
				printf("%*s ", wid_mtu, "");
		}
	}
	if (rt->rt_ifp) {
		if (rt->rt_ifp != lastif) {
			kget(rt->rt_ifp, ifnet);
			kread((u_long)ifnet.if_name, buffer, sizeof(buffer));
			lastif = rt->rt_ifp;
			snprintf(prettyname, sizeof(prettyname),
				 "%s%d", buffer, ifnet.if_unit);
		}
		printf("%*.*s", wid_if, wid_if, prettyname);
		if (rt->rt_rmx.rmx_expire) {
			time_t expire_time;

			if ((expire_time =
			    rt->rt_rmx.rmx_expire - time((time_t *)0)) > 0)
				printf(" %*d", wid_expire, (int)expire_time);
		}
		if (rt->rt_nodes[0].rn_dupedkey)
			printf(" =>");
	}
	putchar('\n');
}

/*
 * Check for alternatives when higher level complains
 * about service problems.  For now, invalidate cached
 * routing information.  If the route was created dynamically
 * (by a redirect), time to try a default gateway again.
 */
void
in_losing(struct inpcb *inp)
{
	register struct rtentry *rt;
	struct rt_addrinfo info;

	if ((rt = inp->inp_route.ro_rt)) {
		inp->inp_route.ro_rt = 0;
		bzero((caddr_t)&info, sizeof(info));
		info.rti_info[RTAX_DST] =
			(struct sockaddr *)&inp->inp_route.ro_dst;
		info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
		info.rti_info[RTAX_NETMASK] = rt_mask(rt);
		rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
		if (rt->rt_flags & RTF_DYNAMIC)
			(void) rtrequest(RTM_DELETE, rt_key(rt),
				rt->rt_gateway, rt_mask(rt), rt->rt_flags,
				(struct rtentry **)0);
		else
		/*
		 * A new route can be allocated
		 * the next time output is attempted.
		 */
			rtfree(rt);
	}
}

static void
size_cols_rtentry(struct rtentry *rt)
{
	static struct ifnet ifnet, *lastif;
	static char buffer[100];
	const char *bp;
	struct sockaddr *sa;
	sa_u addr, mask;
	int len;

	bzero(&addr, sizeof(addr));
	if ((sa = kgetsa(rt_key(rt))))
		bcopy(sa, &addr, sa->sa_len);
	bzero(&mask, sizeof(mask));
	if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
		bcopy(sa, &mask, sa->sa_len);
	bp = fmt_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags);
	len = strlen(bp);
	wid_dst = MAX(len, wid_dst);

	bp = fmt_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST);
	len = strlen(bp);
	wid_gw = MAX(len, wid_gw);

	bp = fmt_flags(rt->rt_flags);
	len = strlen(bp);
	wid_flags = MAX(len, wid_flags);

	if (addr.u_sa.sa_family == AF_INET || Wflag) {
		len = snprintf(buffer, sizeof(buffer), "%d", rt->rt_refcnt);
		wid_refs = MAX(len, wid_refs);
		len = snprintf(buffer, sizeof(buffer), "%lu", rt->rt_use);
		wid_use = MAX(len, wid_use);
		if (Wflag && rt->rt_rmx.rmx_mtu != 0) {
			len = snprintf(buffer, sizeof(buffer),
				       "%lu", rt->rt_rmx.rmx_mtu);
			wid_mtu = MAX(len, wid_mtu);
		}
	}
	if (rt->rt_ifp) {
		if (rt->rt_ifp != lastif) {
			if (kget(rt->rt_ifp, ifnet) == 0) 
				len = strlen(ifnet.if_xname);
			else
				len = strlen("---");
			lastif = rt->rt_ifp;
			wid_if = MAX(len, wid_if);
		}
		if (rt->rt_rmx.rmx_expire) {
			time_t expire_time;

			if ((expire_time =
			    rt->rt_rmx.rmx_expire - uptime.tv_sec) > 0) {
				len = snprintf(buffer, sizeof(buffer), "%d",
					       (int)expire_time);
				wid_expire = MAX(len, wid_expire);
			}
		}
	}
}

static void
p_krtentry(struct rtentry *rt)
{
	static struct ifnet ifnet, *lastif;
	struct sockaddr_storage sock1, sock2;
	struct sockaddr *sa = (struct sockaddr *)&sock1;
	struct sockaddr *mask = (struct sockaddr *)&sock2;

	bcopy(kgetsa(rt_key(rt)), sa, sizeof(struct sockaddr));
	if (sa->sa_len > sizeof(struct sockaddr))
		bcopy(kgetsa(rt_key(rt)), sa, sa->sa_len);

	if (sa->sa_family == PF_KEY) {
		encap_print(rt);
		return;
	}

	if (rt_mask(rt)) {
		bcopy(kgetsa(rt_mask(rt)), mask, sizeof(struct sockaddr));
		if (sa->sa_len > sizeof(struct sockaddr))
			bcopy(kgetsa(rt_mask(rt)), mask, sa->sa_len);
	} else
		mask = 0;

	p_addr(sa, mask, rt->rt_flags);
	p_gwaddr(kgetsa(rt->rt_gateway), sa->sa_family);
	p_flags(rt->rt_flags, "%-6.6s ");
	printf("%5u %8lld ", rt->rt_refcnt, rt->rt_use);
	if (rt->rt_rmx.rmx_mtu)
		printf("%5u ", rt->rt_rmx.rmx_mtu);
	else
		printf("%5s ", "-");
	putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
	printf("  %2d", rt->rt_priority);

	if (rt->rt_ifp) {
		if (rt->rt_ifp != lastif) {
			kread((u_long)rt->rt_ifp, &ifnet, sizeof(ifnet));
			lastif = rt->rt_ifp;
		}
		printf(" %.16s%s", ifnet.if_xname,
		    rt->rt_nodes[0].rn_dupedkey ? " =>" : "");
	}
	putchar('\n');
	if (vflag)
		printf("\texpire   %10lld%c\n",
		    (long long)rt->rt_rmx.rmx_expire,
		    (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ');
}

/*
 * Free an arp entry.
 */
static void
arptfree(struct llinfo_arp *la)
{
	struct rtentry *rt = la->la_rt;
	struct sockaddr_dl *sdl;

	lck_mtx_assert(rnh_lock, LCK_MTX_ASSERT_OWNED);
	RT_LOCK_ASSERT_HELD(rt);

	if (rt->rt_refcnt > 0 && (sdl = SDL(rt->rt_gateway)) &&
	    sdl->sdl_family == AF_LINK) {
		sdl->sdl_alen = 0;
		la->la_asked = 0;
		rt->rt_flags &= ~RTF_REJECT;
		RT_UNLOCK(rt);
	} else {
		/*
		 * Safe to drop rt_lock and use rt_key, since holding
		 * rnh_lock here prevents another thread from calling
		 * rt_setgate() on this route.
		 */
		RT_UNLOCK(rt);
		rtrequest_locked(RTM_DELETE, rt_key(rt), NULL, rt_mask(rt),
		    0, NULL);
	}
}

static int
in_ifadownkill(struct radix_node *rn, void *xap)
{
	struct in_ifadown_arg *ap = xap;
	struct rtentry *rt = (struct rtentry *)rn;
	int err;

	if (rt->rt_ifa == ap->ifa && !(rt->rt_flags & RTF_STATIC)) {
		/*
		 * We need to disable the automatic prune that happens
		 * in this case in rtrequest() because it will blow
		 * away the pointers that rn_walktree() needs in order
		 * continue our descent.  We will end up deleting all
		 * the routes that rtrequest() would have in any case,
		 * so that behavior is not needed there.
		 */
		rt->rt_flags &= ~RTF_PRCLONING;
		err = rtrequest(RTM_DELETE, (struct sockaddr *)rt_key(rt),
				rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0);
		if (err) {
			log(LOG_WARNING, "in_ifadownkill: error %d\n", err);
		}
	}
	return 0;
}

/*
 * Get rid of old routes.  When draining, this deletes everything, even when
 * the timeout is not expired yet.  When updating, this makes sure that
 * nothing has a timeout longer than the current value of rtq_reallyold.
 */
static int
in6_rtqkill(struct radix_node *rn, void *rock)
{
	struct rtqk_arg *ap = rock;
	struct rtentry *rt = (struct rtentry *)rn;
	int err;

	if (rt->rt_flags & RTPRF_OURS) {
		ap->found++;

		if (ap->draining || rt->rt_rmx.rmx_expire <= time_second) {
			if (rt->rt_refcnt > 0)
				panic("rtqkill route really not free");

			err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
					rt_mask(rt), rt->rt_flags, NULL);
			if (err)
				log(LOG_WARNING, "in6_rtqkill: error %d", err);
			else
				ap->killed++;
		} else {
			if (ap->updating &&
			    (rt->rt_rmx.rmx_expire - time_second >
			     rtq_reallyold)) {
				rt->rt_rmx.rmx_expire =
				    time_second + rtq_reallyold;
			}
			ap->nextstop = lmin(ap->nextstop,
					    rt->rt_rmx.rmx_expire);
		}
	}

	return 0;
}

/*
 * Delete a route and generate a message
 */
int
rtdeletemsg(struct rtentry *rt, u_int tableid)
{
	int			error;
	struct rt_addrinfo	info;
	struct ifnet		*ifp;

	/*
	 * Request the new route so that the entry is not actually
	 * deleted.  That will allow the information being reported to
	 * be accurate (and consistent with route_output()).
	 */
	bzero((caddr_t)&info, sizeof(info));
	info.rti_info[RTAX_DST] = rt_key(rt);
	info.rti_info[RTAX_NETMASK] = rt_mask(rt);
	info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
	info.rti_flags = rt->rt_flags;
	ifp = rt->rt_ifp;
	error = rtrequest1(RTM_DELETE, &info, rt->rt_priority, &rt, tableid);

	rt_missmsg(RTM_DELETE, &info, info.rti_flags, ifp, error, tableid);

	/* Adjust the refcount */
	if (error == 0 && rt->rt_refcnt <= 0) {
		rt->rt_refcnt++;
		rtfree(rt);
	}
	return (error);
}

/*
 * On last reference drop, mark the route as belong to us so that it can be
 * timed out.
 */
static void
in_clsroute(struct radix_node *rn, struct radix_node_head *head)
{
	struct rtentry *rt = (struct rtentry *)rn;

	if(!(rt->rt_flags & RTF_UP))
		return;		/* prophylactic measures */

	if((rt->rt_flags & (RTF_LLINFO | RTF_HOST)) != RTF_HOST)
		return;

	if((rt->rt_flags & (RTF_WASCLONED | RTPRF_OURS))
	   != RTF_WASCLONED)
		return;

	/*
	 * As requested by David Greenman:
	 * If rtq_reallyold is 0, just delete the route without
	 * waiting for a timeout cycle to kill it.
	 */
	if(rtq_reallyold != 0) {
		rt->rt_flags |= RTPRF_OURS;
		rt->rt_rmx.rmx_expire = time_second + rtq_reallyold;
	} else {
		rtrequest(RTM_DELETE,
			  (struct sockaddr *)rt_key(rt),
			  rt->rt_gateway, rt_mask(rt),
			  rt->rt_flags, 0);
	}
}

struct sockaddr *
rt_plen2mask(struct rtentry *rt, struct sockaddr_in6 *sa_mask)
{
#ifndef ART
	return (rt_mask(rt));
#else
	return (rt_plentosa(rt_key(rt)->sa_family, rt_plen(rt), sa_mask));
#endif /* ART */
}

//------------------------------------------------------------------------------
// FUNCTION
//
//
// DESCRIPTION
//
//  
// PARAMETERS
//
//  
// RETURN
//
//  
//------------------------------------------------------------------------------
static int ifart_delete( struct radix_node *rn, struct in_addr *addr )
{
	struct rtentry *rt = (struct rtentry *)rn;
	
	if (((struct sockaddr_in *)rt_key(rt))->sin_addr.s_addr == addr->s_addr)
	{
		rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, rt_mask(rt),
              rt->rt_flags, NULL);
	}
	return 0;
}

//------------------------------------------------------------------------------
// FUNCTION
//
//
// DESCRIPTION
//
//  
// PARAMETERS
//
//  
// RETURN
//
//  
//------------------------------------------------------------------------------
static int ifprt_delete( struct radix_node *rn, void *ifp )
{
	struct rtentry *rt = (struct rtentry *)rn;
	
	if(rt->rt_ifp == ifp)
	{
		rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, rt_mask(rt),
              rt->rt_flags, NULL);
	}
	return 0;
}

//------------------------------------------------------------------------------
// FUNCTION
//
//
// DESCRIPTION
//
//  
// PARAMETERS
//
//  
// RETURN
//
//  
//------------------------------------------------------------------------------
static int staticrt_delete( struct radix_node *rn, void *vifp )
{
	struct rtentry *rt = (struct rtentry *)rn;
	
	if((rt->rt_flags & RTF_STATIC) && !(rt->rt_flags & RTF_LLINFO))
	{
		rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, rt_mask(rt),
              0, NULL);
	}
	return 0;
}

void
bootpboot_p_rtentry(struct rtentry *rt)
{

	bootpboot_p_sa(rt_key(rt), rt_mask(rt));
	printf(" ");
	bootpboot_p_sa(rt->rt_gateway, NULL);
	printf(" ");
	printf("flags %x", (unsigned short) rt->rt_flags);
	printf(" %d", (int) rt->rt_rmx.rmx_expire);
	printf(" %s\n", rt->rt_ifp->if_xname);
}

/*
 * Package everything up before printing it.
 * We don't want to block all network operations till
 * the printing completes!
 */
static int
show_inet_route (
	struct radix_node *rn,
	void *vw )
{
	struct rtentry *rt = (struct rtentry *)rn;
	struct ifnet *ifp;
	struct dinfo *dp = (struct dinfo *)vw;
	struct rinfo *r;

	/*
	 * Get a pointer to a new route info structure
	 */
	if (dp->count >= dp->capacity) {
		r = realloc (dp->routes, (sizeof *r) * (dp->capacity + 20));
		if (r == 0)
			return ENOMEM;
		dp->capacity += 20;
		dp->routes = r;
	}
	r = dp->routes + dp->count++;

	/*
	 * Fill in the route info structure
	 */
	copyAddress (&r->dst, rt_key(rt), sizeof r->dst);
	if (rt->rt_flags & (RTF_GATEWAY | RTF_HOST)) {
		copyAddress (&r->un, rt->rt_gateway, sizeof r->un);
	}
	else {
		/*
		 * Create a fake address to hold the mask
		 */
		struct sockaddr_in dummy;

		dummy.sin_family = AF_INET;
		dummy.sin_len = sizeof dummy;
		dummy.sin_addr = ((struct sockaddr_in *)rt_mask(rt))->sin_addr;
		copyAddress (&r->un, &dummy, sizeof r->un);
	}
	r->flags = rt->rt_flags;
	r->refcnt = rt->rt_refcnt;
	r->pksent = rt->rt_rmx.rmx_pksent;
	r->expire = rt->rt_rmx.rmx_expire;
	ifp = rt->rt_ifp;
	strncpy (r->ifname, (ifp->if_name ? ifp->if_name : ""), sizeof r->ifname);
	r->ifunit = ifp->if_unit;
	return 0;
}