initial import of NetBSD tree

1 files changed, 839 insertions, 0 deletions

diff --git a/sys/net/rtsock.c b/sys/net/rtsock.c
new file mode 100644
index 00000000000..79e6921cb5e
--- /dev/null
+++ b/sys/net/rtsock.c
@@ -0,0 +1,839 @@
+/*	$NetBSD: rtsock.c,v 1.16 1995/08/19 07:48:14 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1988, 1991, 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.
+ *
+ *	@(#)rtsock.c	8.6 (Berkeley) 2/11/95
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/domain.h>
+#include <sys/protosw.h>
+
+#include <net/if.h>
+#include <net/route.h>
+#include <net/raw_cb.h>
+
+struct	sockaddr route_dst = { 2, PF_ROUTE, };
+struct	sockaddr route_src = { 2, PF_ROUTE, };
+struct	sockproto route_proto = { PF_ROUTE, };
+
+struct walkarg {
+	int	w_op, w_arg, w_given, w_needed, w_tmemsize;
+	caddr_t	w_where, w_tmem;
+};
+
+static struct mbuf *
+		rt_msg1 __P((int, struct rt_addrinfo *));
+static int	rt_msg2 __P((int,
+		    struct rt_addrinfo *, caddr_t, struct walkarg *));
+static void	rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *));
+
+/* Sleazy use of local variables throughout file, warning!!!! */
+#define dst	info.rti_info[RTAX_DST]
+#define gate	info.rti_info[RTAX_GATEWAY]
+#define netmask	info.rti_info[RTAX_NETMASK]
+#define genmask	info.rti_info[RTAX_GENMASK]
+#define ifpaddr	info.rti_info[RTAX_IFP]
+#define ifaaddr	info.rti_info[RTAX_IFA]
+#define brdaddr	info.rti_info[RTAX_BRD]
+
+/*ARGSUSED*/
+int
+route_usrreq(so, req, m, nam, control)
+	register struct socket *so;
+	int req;
+	struct mbuf *m, *nam, *control;
+{
+	register int error = 0;
+	register struct rawcb *rp = sotorawcb(so);
+	int s;
+
+	if (req == PRU_ATTACH) {
+		MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK);
+		if (so->so_pcb = rp)
+			bzero((caddr_t)so->so_pcb, sizeof(*rp));
+
+	}
+	if (req == PRU_DETACH && rp) {
+		int af = rp->rcb_proto.sp_protocol;
+		if (af == AF_INET)
+			route_cb.ip_count--;
+		else if (af == AF_NS)
+			route_cb.ns_count--;
+		else if (af == AF_ISO)
+			route_cb.iso_count--;
+		route_cb.any_count--;
+	}
+	s = splsoftnet();
+	error = raw_usrreq(so, req, m, nam, control);
+	rp = sotorawcb(so);
+	if (req == PRU_ATTACH && rp) {
+		int af = rp->rcb_proto.sp_protocol;
+		if (error) {
+			free((caddr_t)rp, M_PCB);
+			splx(s);
+			return (error);
+		}
+		if (af == AF_INET)
+			route_cb.ip_count++;
+		else if (af == AF_NS)
+			route_cb.ns_count++;
+		else if (af == AF_ISO)
+			route_cb.iso_count++;
+		rp->rcb_faddr = &route_src;
+		route_cb.any_count++;
+		soisconnected(so);
+		so->so_options |= SO_USELOOPBACK;
+	}
+	splx(s);
+	return (error);
+}
+
+/*ARGSUSED*/
+int
+route_output(m, so)
+	register struct mbuf *m;
+	struct socket *so;
+{
+	register struct rt_msghdr *rtm = 0;
+	register struct rtentry *rt = 0;
+	struct rtentry *saved_nrt = 0;
+	struct radix_node_head *rnh;
+	struct rt_addrinfo info;
+	int len, error = 0;
+	struct ifnet *ifp = 0;
+	struct ifaddr *ifa = 0;
+
+#define senderr(e) { error = e; goto flush;}
+	if (m == 0 || ((m->m_len < sizeof(int32_t)) &&
+		       (m = m_pullup(m, sizeof(int32_t))) == 0))
+		return (ENOBUFS);
+	if ((m->m_flags & M_PKTHDR) == 0)
+		panic("route_output");
+	len = m->m_pkthdr.len;
+	if (len < sizeof(*rtm) ||
+	    len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
+		dst = 0;
+		senderr(EINVAL);
+	}
+	R_Malloc(rtm, struct rt_msghdr *, len);
+	if (rtm == 0) {
+		dst = 0;
+		senderr(ENOBUFS);
+	}
+	m_copydata(m, 0, len, (caddr_t)rtm);
+	if (rtm->rtm_version != RTM_VERSION) {
+		dst = 0;
+		senderr(EPROTONOSUPPORT);
+	}
+	rtm->rtm_pid = curproc->p_pid;
+	info.rti_addrs = rtm->rtm_addrs;
+	rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info);
+	if (dst == 0)
+		senderr(EINVAL);
+	if (genmask) {
+		struct radix_node *t;
+		t = rn_addmask((caddr_t)genmask, 0, 1);
+		if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0)
+			genmask = (struct sockaddr *)(t->rn_key);
+		else
+			senderr(ENOBUFS);
+	}
+	switch (rtm->rtm_type) {
+
+	case RTM_ADD:
+		if (gate == 0)
+			senderr(EINVAL);
+		error = rtrequest(RTM_ADD, dst, gate, netmask,
+					rtm->rtm_flags, &saved_nrt);
+		if (error == 0 && saved_nrt) {
+			rt_setmetrics(rtm->rtm_inits,
+				&rtm->rtm_rmx, &saved_nrt->rt_rmx);
+			saved_nrt->rt_refcnt--;
+			saved_nrt->rt_genmask = genmask;
+		}
+		break;
+
+	case RTM_DELETE:
+		error = rtrequest(RTM_DELETE, dst, gate, netmask,
+				rtm->rtm_flags, &saved_nrt);
+		if (error == 0) {
+			(rt = saved_nrt)->rt_refcnt++;
+			goto report;
+		}
+		break;
+
+	case RTM_GET:
+	case RTM_CHANGE:
+	case RTM_LOCK:
+		if ((rnh = rt_tables[dst->sa_family]) == 0) {
+			senderr(EAFNOSUPPORT);
+		} else if (rt = (struct rtentry *)
+				rnh->rnh_lookup(dst, netmask, rnh))
+			rt->rt_refcnt++;
+		else
+			senderr(ESRCH);
+		switch(rtm->rtm_type) {
+
+		case RTM_GET:
+		report:
+			dst = rt_key(rt);
+			gate = rt->rt_gateway;
+			netmask = rt_mask(rt);
+			genmask = rt->rt_genmask;
+			if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
+				if (ifp = rt->rt_ifp) {
+					ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr;
+					ifaaddr = rt->rt_ifa->ifa_addr;
+					if (ifp->if_flags & IFF_POINTOPOINT)
+						brdaddr = rt->rt_ifa->ifa_dstaddr;
+					else
+						brdaddr = 0;
+					rtm->rtm_index = ifp->if_index;
+				} else {
+					ifpaddr = 0;
+					ifaaddr = 0;
+			    }
+			}
+			len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0,
+				(struct walkarg *)0);
+			if (len > rtm->rtm_msglen) {
+				struct rt_msghdr *new_rtm;
+				R_Malloc(new_rtm, struct rt_msghdr *, len);
+				if (new_rtm == 0)
+					senderr(ENOBUFS);
+				Bcopy(rtm, new_rtm, rtm->rtm_msglen);
+				Free(rtm); rtm = new_rtm;
+			}
+			(void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm,
+				(struct walkarg *)0);
+			rtm->rtm_flags = rt->rt_flags;
+			rtm->rtm_rmx = rt->rt_rmx;
+			rtm->rtm_addrs = info.rti_addrs;
+			break;
+
+		case RTM_CHANGE:
+			if (gate && rt_setgate(rt, rt_key(rt), gate))
+				senderr(EDQUOT);
+			/* new gateway could require new ifaddr, ifp;
+			   flags may also be different; ifp may be specified
+			   by ll sockaddr when protocol address is ambiguous */
+			if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) &&
+			    (ifp = ifa->ifa_ifp))
+				ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate,
+							ifp);
+			else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) ||
+				 (ifa = ifa_ifwithroute(rt->rt_flags,
+							rt_key(rt), gate)))
+				ifp = ifa->ifa_ifp;
+			if (ifa) {
+				register struct ifaddr *oifa = rt->rt_ifa;
+				if (oifa != ifa) {
+				    if (oifa && oifa->ifa_rtrequest)
+					oifa->ifa_rtrequest(RTM_DELETE,
+								rt, gate);
+				    IFAFREE(rt->rt_ifa);
+				    rt->rt_ifa = ifa;
+				    ifa->ifa_refcnt++;
+				    rt->rt_ifp = ifp;
+				}
+			}
+			rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
+					&rt->rt_rmx);
+			if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
+			       rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate);
+			if (genmask)
+				rt->rt_genmask = genmask;
+			/*
+			 * Fall into
+			 */
+		case RTM_LOCK:
+			rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
+			rt->rt_rmx.rmx_locks |=
+				(rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
+			break;
+		}
+		break;
+
+	default:
+		senderr(EOPNOTSUPP);
+	}
+
+flush:
+	if (rtm) {
+		if (error)
+			rtm->rtm_errno = error;
+		else 
+			rtm->rtm_flags |= RTF_DONE;
+	}
+	if (rt)
+		rtfree(rt);
+    {
+	register struct rawcb *rp = 0;
+	/*
+	 * Check to see if we don't want our own messages.
+	 */
+	if ((so->so_options & SO_USELOOPBACK) == 0) {
+		if (route_cb.any_count <= 1) {
+			if (rtm)
+				Free(rtm);
+			m_freem(m);
+			return (error);
+		}
+		/* There is another listener, so construct message */
+		rp = sotorawcb(so);
+	}
+	if (rtm) {
+		m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
+		Free(rtm);
+	}
+	if (rp)
+		rp->rcb_proto.sp_family = 0; /* Avoid us */
+	if (dst)
+		route_proto.sp_protocol = dst->sa_family;
+	raw_input(m, &route_proto, &route_src, &route_dst);
+	if (rp)
+		rp->rcb_proto.sp_family = PF_ROUTE;
+    }
+	return (error);
+}
+
+void
+rt_setmetrics(which, in, out)
+	u_long which;
+	register struct rt_metrics *in, *out;
+{
+#define metric(f, e) if (which & (f)) out->e = in->e;
+	metric(RTV_RPIPE, rmx_recvpipe);
+	metric(RTV_SPIPE, rmx_sendpipe);
+	metric(RTV_SSTHRESH, rmx_ssthresh);
+	metric(RTV_RTT, rmx_rtt);
+	metric(RTV_RTTVAR, rmx_rttvar);
+	metric(RTV_HOPCOUNT, rmx_hopcount);
+	metric(RTV_MTU, rmx_mtu);
+	metric(RTV_EXPIRE, rmx_expire);
+#undef metric
+}
+
+#define ROUNDUP(a) \
+	((a) > 0 ? (1 + (((a) - 1) | (sizeof(int32_t) - 1))) : sizeof(int32_t))
+#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
+
+static void
+rt_xaddrs(cp, cplim, rtinfo)
+	register caddr_t cp, cplim;
+	register struct rt_addrinfo *rtinfo;
+{
+	register struct sockaddr *sa;
+	register int i;
+
+	bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info));
+	for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
+		if ((rtinfo->rti_addrs & (1 << i)) == 0)
+			continue;
+		rtinfo->rti_info[i] = sa = (struct sockaddr *)cp;
+		ADVANCE(cp, sa);
+	}
+}
+
+/*
+ * Copy data from a buffer back into the indicated mbuf chain,
+ * starting "off" bytes from the beginning, extending the mbuf
+ * chain if necessary.
+ */
+void
+m_copyback(m0, off, len, cp)
+	struct	mbuf *m0;
+	register int off;
+	register int len;
+	caddr_t cp;
+{
+	register int mlen;
+	register struct mbuf *m = m0, *n;
+	int totlen = 0;
+
+	if (m0 == 0)
+		return;
+	while (off > (mlen = m->m_len)) {
+		off -= mlen;
+		totlen += mlen;
+		if (m->m_next == 0) {
+			n = m_getclr(M_DONTWAIT, m->m_type);
+			if (n == 0)
+				goto out;
+			n->m_len = min(MLEN, len + off);
+			m->m_next = n;
+		}
+		m = m->m_next;
+	}
+	while (len > 0) {
+		mlen = min (m->m_len - off, len);
+		bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen);
+		cp += mlen;
+		len -= mlen;
+		mlen += off;
+		off = 0;
+		totlen += mlen;
+		if (len == 0)
+			break;
+		if (m->m_next == 0) {
+			n = m_get(M_DONTWAIT, m->m_type);
+			if (n == 0)
+				break;
+			n->m_len = min(MLEN, len);
+			m->m_next = n;
+		}
+		m = m->m_next;
+	}
+out:	if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen))
+		m->m_pkthdr.len = totlen;
+}
+
+static struct mbuf *
+rt_msg1(type, rtinfo)
+	int type;
+	register struct rt_addrinfo *rtinfo;
+{
+	register struct rt_msghdr *rtm;
+	register struct mbuf *m;
+	register int i;
+	register struct sockaddr *sa;
+	int len, dlen;
+
+	m = m_gethdr(M_DONTWAIT, MT_DATA);
+	if (m == 0)
+		return (m);
+	switch (type) {
+
+	case RTM_DELADDR:
+	case RTM_NEWADDR:
+		len = sizeof(struct ifa_msghdr);
+		break;
+
+	case RTM_IFINFO:
+		len = sizeof(struct if_msghdr);
+		break;
+
+	default:
+		len = sizeof(struct rt_msghdr);
+	}
+	if (len > MHLEN)
+		panic("rt_msg1");
+	m->m_pkthdr.len = m->m_len = len;
+	m->m_pkthdr.rcvif = 0;
+	rtm = mtod(m, struct rt_msghdr *);
+	bzero((caddr_t)rtm, len);
+	for (i = 0; i < RTAX_MAX; i++) {
+		if ((sa = rtinfo->rti_info[i]) == NULL)
+			continue;
+		rtinfo->rti_addrs |= (1 << i);
+		dlen = ROUNDUP(sa->sa_len);
+		m_copyback(m, len, dlen, (caddr_t)sa);
+		len += dlen;
+	}
+	if (m->m_pkthdr.len != len) {
+		m_freem(m);
+		return (NULL);
+	}
+	rtm->rtm_msglen = len;
+	rtm->rtm_version = RTM_VERSION;
+	rtm->rtm_type = type;
+	return (m);
+}
+
+static int
+rt_msg2(type, rtinfo, cp, w)
+	int type;
+	register struct rt_addrinfo *rtinfo;
+	caddr_t cp;
+	struct walkarg *w;
+{
+	register int i;
+	int len, dlen, second_time = 0;
+	caddr_t cp0;
+
+	rtinfo->rti_addrs = 0;
+again:
+	switch (type) {
+
+	case RTM_DELADDR:
+	case RTM_NEWADDR:
+		len = sizeof(struct ifa_msghdr);
+		break;
+
+	case RTM_IFINFO:
+		len = sizeof(struct if_msghdr);
+		break;
+
+	default:
+		len = sizeof(struct rt_msghdr);
+	}
+	if (cp0 = cp)
+		cp += len;
+	for (i = 0; i < RTAX_MAX; i++) {
+		register struct sockaddr *sa;
+
+		if ((sa = rtinfo->rti_info[i]) == 0)
+			continue;
+		rtinfo->rti_addrs |= (1 << i);
+		dlen = ROUNDUP(sa->sa_len);
+		if (cp) {
+			bcopy((caddr_t)sa, cp, (unsigned)dlen);
+			cp += dlen;
+		}
+		len += dlen;
+	}
+	if (cp == 0 && w != NULL && !second_time) {
+		register struct walkarg *rw = w;
+
+		rw->w_needed += len;
+		if (rw->w_needed <= 0 && rw->w_where) {
+			if (rw->w_tmemsize < len) {
+				if (rw->w_tmem)
+					free(rw->w_tmem, M_RTABLE);
+				if (rw->w_tmem = (caddr_t)
+						malloc(len, M_RTABLE, M_NOWAIT))
+					rw->w_tmemsize = len;
+			}
+			if (rw->w_tmem) {
+				cp = rw->w_tmem;
+				second_time = 1;
+				goto again;
+			} else
+				rw->w_where = 0;
+		}
+	}
+	if (cp) {
+		register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
+
+		rtm->rtm_version = RTM_VERSION;
+		rtm->rtm_type = type;
+		rtm->rtm_msglen = len;
+	}
+	return (len);
+}
+
+/*
+ * This routine is called to generate a message from the routing
+ * socket indicating that a redirect has occured, a routing lookup
+ * has failed, or that a protocol has detected timeouts to a particular
+ * destination.
+ */
+void
+rt_missmsg(type, rtinfo, flags, error)
+	int type, flags, error;
+	register struct rt_addrinfo *rtinfo;
+{
+	register struct rt_msghdr *rtm;
+	register struct mbuf *m;
+	struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
+
+	if (route_cb.any_count == 0)
+		return;
+	m = rt_msg1(type, rtinfo);
+	if (m == 0)
+		return;
+	rtm = mtod(m, struct rt_msghdr *);
+	rtm->rtm_flags = RTF_DONE | flags;
+	rtm->rtm_errno = error;
+	rtm->rtm_addrs = rtinfo->rti_addrs;
+	route_proto.sp_protocol = sa ? sa->sa_family : 0;
+	raw_input(m, &route_proto, &route_src, &route_dst);
+}
+
+/*
+ * This routine is called to generate a message from the routing
+ * socket indicating that the status of a network interface has changed.
+ */
+void
+rt_ifmsg(ifp)
+	register struct ifnet *ifp;
+{
+	register struct if_msghdr *ifm;
+	struct mbuf *m;
+	struct rt_addrinfo info;
+
+	if (route_cb.any_count == 0)
+		return;
+	bzero((caddr_t)&info, sizeof(info));
+	m = rt_msg1(RTM_IFINFO, &info);
+	if (m == 0)
+		return;
+	ifm = mtod(m, struct if_msghdr *);
+	ifm->ifm_index = ifp->if_index;
+	ifm->ifm_flags = ifp->if_flags;
+	ifm->ifm_data = ifp->if_data;
+	ifm->ifm_addrs = 0;
+	route_proto.sp_protocol = 0;
+	raw_input(m, &route_proto, &route_src, &route_dst);
+}
+
+/*
+ * This is called to generate messages from the routing socket
+ * indicating a network interface has had addresses associated with it.
+ * if we ever reverse the logic and replace messages TO the routing
+ * socket indicate a request to configure interfaces, then it will
+ * be unnecessary as the routing socket will automatically generate
+ * copies of it.
+ */
+void
+rt_newaddrmsg(cmd, ifa, error, rt)
+	int cmd, error;
+	register struct ifaddr *ifa;
+	register struct rtentry *rt;
+{
+	struct rt_addrinfo info;
+	struct sockaddr *sa;
+	int pass;
+	struct mbuf *m;
+	struct ifnet *ifp = ifa->ifa_ifp;
+
+	if (route_cb.any_count == 0)
+		return;
+	for (pass = 1; pass < 3; pass++) {
+		bzero((caddr_t)&info, sizeof(info));
+		if ((cmd == RTM_ADD && pass == 1) ||
+		    (cmd == RTM_DELETE && pass == 2)) {
+			register struct ifa_msghdr *ifam;
+			int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
+
+			ifaaddr = sa = ifa->ifa_addr;
+			ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr;
+			netmask = ifa->ifa_netmask;
+			brdaddr = ifa->ifa_dstaddr;
+			if ((m = rt_msg1(ncmd, &info)) == NULL)
+				continue;
+			ifam = mtod(m, struct ifa_msghdr *);
+			ifam->ifam_index = ifp->if_index;
+			ifam->ifam_metric = ifa->ifa_metric;
+			ifam->ifam_flags = ifa->ifa_flags;
+			ifam->ifam_addrs = info.rti_addrs;
+		}
+		if ((cmd == RTM_ADD && pass == 2) ||
+		    (cmd == RTM_DELETE && pass == 1)) {
+			register struct rt_msghdr *rtm;
+			
+			if (rt == 0)
+				continue;
+			netmask = rt_mask(rt);
+			dst = sa = rt_key(rt);
+			gate = rt->rt_gateway;
+			if ((m = rt_msg1(cmd, &info)) == NULL)
+				continue;
+			rtm = mtod(m, struct rt_msghdr *);
+			rtm->rtm_index = ifp->if_index;
+			rtm->rtm_flags |= rt->rt_flags;
+			rtm->rtm_errno = error;
+			rtm->rtm_addrs = info.rti_addrs;
+		}
+		route_proto.sp_protocol = sa ? sa->sa_family : 0;
+		raw_input(m, &route_proto, &route_src, &route_dst);
+	}
+}
+
+/*
+ * This is used in dumping the kernel table via sysctl().
+ */
+int
+sysctl_dumpentry(rn, w)
+	struct radix_node *rn;
+	register struct walkarg *w;
+{
+	register struct rtentry *rt = (struct rtentry *)rn;
+	int error = 0, size;
+	struct rt_addrinfo info;
+
+	if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
+		return 0;
+	bzero((caddr_t)&info, sizeof(info));
+	dst = rt_key(rt);
+	gate = rt->rt_gateway;
+	netmask = rt_mask(rt);
+	genmask = rt->rt_genmask;
+	if (rt->rt_ifp) {
+		ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr;
+		ifaaddr = rt->rt_ifa->ifa_addr;
+		if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
+			brdaddr = rt->rt_ifa->ifa_dstaddr;
+	}
+	size = rt_msg2(RTM_GET, &info, 0, w);
+	if (w->w_where && w->w_tmem) {
+		register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
+
+		rtm->rtm_flags = rt->rt_flags;
+		rtm->rtm_use = rt->rt_use;
+		rtm->rtm_rmx = rt->rt_rmx;
+		rtm->rtm_index = rt->rt_ifp->if_index;
+		rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
+		rtm->rtm_addrs = info.rti_addrs;
+		if (error = copyout((caddr_t)rtm, w->w_where, size))
+			w->w_where = NULL;
+		else
+			w->w_where += size;
+	}
+	return (error);
+}
+
+int
+sysctl_iflist(af, w)
+	int	af;
+	register struct	walkarg *w;
+{
+	register struct ifnet *ifp;
+	register struct ifaddr *ifa;
+	struct	rt_addrinfo info;
+	int	len, error = 0;
+
+	bzero((caddr_t)&info, sizeof(info));
+	for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) {
+		if (w->w_arg && w->w_arg != ifp->if_index)
+			continue;
+		ifa = ifp->if_addrlist.tqh_first;
+		ifpaddr = ifa->ifa_addr;
+		len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w);
+		ifpaddr = 0;
+		if (w->w_where && w->w_tmem) {
+			register struct if_msghdr *ifm;
+
+			ifm = (struct if_msghdr *)w->w_tmem;
+			ifm->ifm_index = ifp->if_index;
+			ifm->ifm_flags = ifp->if_flags;
+			ifm->ifm_data = ifp->if_data;
+			ifm->ifm_addrs = info.rti_addrs;
+			if (error = copyout((caddr_t)ifm, w->w_where, len))
+				return (error);
+			w->w_where += len;
+		}
+		while (ifa = ifa->ifa_list.tqe_next) {
+			if (af && af != ifa->ifa_addr->sa_family)
+				continue;
+			ifaaddr = ifa->ifa_addr;
+			netmask = ifa->ifa_netmask;
+			brdaddr = ifa->ifa_dstaddr;
+			len = rt_msg2(RTM_NEWADDR, &info, 0, w);
+			if (w->w_where && w->w_tmem) {
+				register struct ifa_msghdr *ifam;
+
+				ifam = (struct ifa_msghdr *)w->w_tmem;
+				ifam->ifam_index = ifa->ifa_ifp->if_index;
+				ifam->ifam_flags = ifa->ifa_flags;
+				ifam->ifam_metric = ifa->ifa_metric;
+				ifam->ifam_addrs = info.rti_addrs;
+				if (error = copyout(w->w_tmem, w->w_where, len))
+					return (error);
+				w->w_where += len;
+			}
+		}
+		ifaaddr = netmask = brdaddr = 0;
+	}
+	return (0);
+}
+
+int
+sysctl_rtable(name, namelen, where, given, new, newlen)
+	int	*name;
+	int	namelen;
+	caddr_t	where;
+	size_t	*given;
+	caddr_t	*new;
+	size_t	newlen;
+{
+	register struct radix_node_head *rnh;
+	int	i, s, error = EINVAL;
+	u_char  af;
+	struct	walkarg w;
+
+	if (new)
+		return (EPERM);
+	if (namelen != 3)
+		return (EINVAL);
+	af = name[0];
+	Bzero(&w, sizeof(w));
+	w.w_where = where;
+	w.w_given = *given;
+	w.w_needed = 0 - w.w_given;
+	w.w_op = name[1];
+	w.w_arg = name[2];
+
+	s = splsoftnet();
+	switch (w.w_op) {
+
+	case NET_RT_DUMP:
+	case NET_RT_FLAGS:
+		for (i = 1; i <= AF_MAX; i++)
+			if ((rnh = rt_tables[i]) && (af == 0 || af == i) &&
+			    (error = rnh->rnh_walktree(rnh,
+							sysctl_dumpentry, &w)))
+				break;
+		break;
+
+	case NET_RT_IFLIST:
+		error = sysctl_iflist(af, &w);
+	}
+	splx(s);
+	if (w.w_tmem)
+		free(w.w_tmem, M_RTABLE);
+	w.w_needed += w.w_given;
+	if (where) {
+		*given = w.w_where - where;
+		if (*given < w.w_needed)
+			return (ENOMEM);
+	} else {
+		*given = (11 * w.w_needed) / 10;
+	}
+	return (error);
+}
+
+/*
+ * Definitions of protocols supported in the ROUTE domain.
+ */
+
+extern	struct domain routedomain;		/* or at least forward */
+
+struct protosw routesw[] = {
+{ SOCK_RAW,	&routedomain,	0,		PR_ATOMIC|PR_ADDR,
+  raw_input,	route_output,	raw_ctlinput,	0,
+  route_usrreq,
+  raw_init,	0,		0,		0,
+  sysctl_rtable,
+}
+};
+
+struct domain routedomain =
+    { PF_ROUTE, "route", route_init, 0, 0,
+      routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };