[unix-history] / usr / src / sys / net / rtsock.c

/*
 * Copyright (c) 1988 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)rtsock.c	7.15 (Berkeley) %G%
 */

#include "param.h"
#include "mbuf.h"
#include "user.h"
#include "proc.h"
#include "socket.h"
#include "socketvar.h"
#include "domain.h"
#include "protosw.h"
#include "errno.h"

#include "af.h"
#include "if.h"
#include "route.h"
#include "raw_cb.h"

#include "machine/mtpr.h"

struct sockaddr route_dst = { 2, PF_ROUTE, };
struct sockaddr route_src = { 2, PF_ROUTE, };
struct sockproto route_proto = { PF_ROUTE, };

/*ARGSUSED*/
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 = (caddr_t)rp)
			bzero(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 = splnet();
	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);
}
#define ROUNDUP(a) \
	((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))

/*ARGSUSED*/
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 sockaddr *dst = 0, *gate = 0, *netmask = 0, *genmask = 0;
	struct sockaddr *ifpaddr = 0, *ifaaddr;
	caddr_t cp, lim;
	int len, error = 0;
	struct ifnet *ifp = 0;
	struct	ifaddr *ifa;
	extern struct ifaddr *ifaof_ifpforaddr(), *ifa_ifwithroute();

#define senderr(e) { error = e; goto flush;}
	if (m == 0 || m->m_len < sizeof(long))
		return (ENOBUFS);
	if ((m = m_pullup(m, sizeof(long))) == 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)
		senderr(EINVAL);
	R_Malloc(rtm, struct rt_msghdr *, len);
	if (rtm == 0)
		senderr(ENOBUFS);
	m_copydata(m, 0, len, (caddr_t)rtm);
	if (rtm->rtm_version != RTM_VERSION)
		senderr(EPROTONOSUPPORT);
	rtm->rtm_pid = u.u_procp->p_pid;
	lim = len + (caddr_t) rtm;
	cp = (caddr_t) (rtm + 1);
	if (rtm->rtm_addrs & RTA_DST) {
		dst = (struct sockaddr *)cp;
		ADVANCE(cp, dst);
	} else
		senderr(EINVAL);
	if ((rtm->rtm_addrs & RTA_GATEWAY) && cp < lim)  {
		gate = (struct sockaddr *)cp;
		ADVANCE(cp, gate);
	}
	if ((rtm->rtm_addrs & RTA_NETMASK) && cp < lim)  {
		netmask = (struct sockaddr *)cp;
		ADVANCE(cp, netmask);
	}
	if ((rtm->rtm_addrs & RTA_GENMASK) && cp < lim)  {
		struct radix_node *t, *rn_addmask();
		genmask = (struct sockaddr *)cp;
		ADVANCE(cp, genmask);
		t = rn_addmask(genmask, 1, 2);
		if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0)
			genmask = (struct sockaddr *)(t->rn_key);
		else
			senderr(ENOBUFS);
	}
	if ((rtm->rtm_addrs & RTA_IFP) && cp < lim)  {
		ifpaddr = (struct sockaddr *)cp;
	}
	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, (struct rtentry **)0);
		break;

	case RTM_GET:
	case RTM_CHANGE:
	case RTM_LOCK:
		rt = rtalloc1(dst, 0);
		if (rt == 0)
			senderr(ESRCH);
		if (((struct radix_node *)rt)->rn_dupedkey) {
			if (netmask == 0 && rtm->rtm_type != RTM_GET)
				senderr(ETOOMANYREFS);
		}
		switch(rtm->rtm_type) {

		case RTM_GET:
			dst = rt_key(rt); len = sizeof(*rtm);
			ADVANCE(len, dst);
			rtm->rtm_addrs |= RTA_DST;
			if (gate = rt->rt_gateway) {
				ADVANCE(len, gate);
				rtm->rtm_addrs |= RTA_GATEWAY;
			} else
				rtm->rtm_addrs &= ~RTA_GATEWAY;
			if (netmask = rt_mask(rt)) {
				ADVANCE(len, netmask);
				rtm->rtm_addrs |= RTA_NETMASK;
			} else
				rtm->rtm_addrs &= ~RTA_NETMASK;
			if (genmask = rt->rt_genmask) {
				ADVANCE(len, genmask);
				rtm->rtm_addrs |= RTA_GENMASK;
			} else
				rtm->rtm_addrs &= ~RTA_GENMASK;
			if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
				if (rt->rt_ifp == 0)
					goto badif;
				for (ifa = rt->rt_ifp->if_addrlist;
				    ifa && ifa->ifa_addr->sa_family != AF_LINK;
				     ifa = ifa->ifa_next){}
				if (ifa && rt->rt_ifa) {
					ifpaddr = ifa->ifa_addr;
					ADVANCE(len, ifpaddr);
					ifaaddr = rt->rt_ifa->ifa_addr;
					ADVANCE(len, ifaaddr);
					rtm->rtm_addrs |= RTA_IFP | RTA_IFA;
				} else {
				badif:	ifpaddr = 0;
					rtm->rtm_addrs &= ~(RTA_IFP | RTA_IFA);
				}
			}
			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;
			}
			rtm->rtm_msglen = len;
			rtm->rtm_flags = rt->rt_flags;
			rtm->rtm_rmx = rt->rt_rmx;
			cp = (caddr_t) (1 + rtm);
			len = ROUNDUP(dst->sa_len); 
			Bcopy(dst, cp, len); cp += len;
			if (gate) {
			    len = ROUNDUP(gate->sa_len);
			    Bcopy(gate, cp, len); cp += len;
			}
			if (netmask) {
			    len = ROUNDUP(netmask->sa_len);
			    Bcopy(netmask, cp, len); cp += len;
			}
			if (genmask) {
			    len = ROUNDUP(genmask->sa_len);
			    Bcopy(genmask, cp, len); cp += len;
			}
			if (ifpaddr) {
			    len = ROUNDUP(ifpaddr->sa_len);
			    Bcopy(ifpaddr, cp, len); cp += len;
			    len = ROUNDUP(ifaaddr->sa_len);
			    Bcopy(ifaaddr, cp, len); cp += len;
			}
			break;

		case RTM_CHANGE:
			if (gate &&
			    (gate->sa_len > (len = rt->rt_gateway->sa_len)))
				senderr(EDQUOT);
			if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
				rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt, gate);
			/* 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(gate, ifp))) {
				     /* We got it */
			} else {
			    ifa = 0; ifp = 0;
			}
			if (gate)
				Bcopy(gate, rt->rt_gateway, len);
			rt_setmetrics(rtm->rtm_inits,
				&rtm->rtm_rmx, &rt->rt_rmx);
			if (ifa == 0)
			    ifa = ifa_ifwithroute(rt->rt_flags, rt_key(rt),
						gate);
			if (ifa) {
				if (rt->rt_ifa != ifa) {
				    rt->rt_ifa = ifa;
				    rt->rt_ifp = ifa->ifa_ifp;
				}
			}
			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 & rtm->rtm_rmx.rmx_locks);
			rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
			break;
		}
		goto cleanup;

	default:
		senderr(EOPNOTSUPP);
	}

flush:
	if (rtm) {
		if (error)
			rtm->rtm_errno = error;
		else 
			rtm->rtm_flags |= RTF_DONE;
	}
cleanup:
	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);
}

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);
#undef metric
}

/*
 * Copy data from a buffer back into the indicated mbuf chain,
 * starting "off" bytes from the beginning, extending the mbuf
 * chain if necessary.
 */
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;
}

/* 
 * The miss message and losing message are very similar.
 */

rt_missmsg(type, dst, gate, mask, src, flags, error)
register struct sockaddr *dst;
struct sockaddr *gate, *mask, *src;
{
	register struct rt_msghdr *rtm;
	register struct mbuf *m;
	int dlen = ROUNDUP(dst->sa_len);
	int len = dlen + sizeof(*rtm);

	if (route_cb.any_count == 0)
		return;
	m = m_gethdr(M_DONTWAIT, MT_DATA);
	if (m == 0)
		return;
	m->m_pkthdr.len = m->m_len = min(len, MHLEN);
	m->m_pkthdr.rcvif = 0;
	rtm = mtod(m, struct rt_msghdr *);
	bzero((caddr_t)rtm, sizeof(*rtm)); /*XXX assumes sizeof(*rtm) < MHLEN*/
	rtm->rtm_flags = RTF_DONE | flags;
	rtm->rtm_msglen = len;
	rtm->rtm_version = RTM_VERSION;
	rtm->rtm_type = type;
	rtm->rtm_addrs = RTA_DST;
	if (type == RTM_OLDADD || type == RTM_OLDDEL) {
		rtm->rtm_pid = u.u_procp->p_pid;
	}
	m_copyback(m, sizeof (*rtm), dlen, (caddr_t)dst);
	if (gate) {
		dlen = ROUNDUP(gate->sa_len);
		m_copyback(m, len ,  dlen, (caddr_t)gate);
		len += dlen;
		rtm->rtm_addrs |= RTA_GATEWAY;
	}
	if (mask) {
		dlen = ROUNDUP(mask->sa_len);
		m_copyback(m, len ,  dlen, (caddr_t)mask);
		len += dlen;
		rtm->rtm_addrs |= RTA_NETMASK;
	}
	if (src) {
		dlen = ROUNDUP(src->sa_len);
		m_copyback(m, len ,  dlen, (caddr_t)src);
		len += dlen;
		rtm->rtm_addrs |= RTA_AUTHOR;
	}
	if (m->m_pkthdr.len != len) {
		m_freem(m);
		return;
	}
	rtm->rtm_errno = error;
	rtm->rtm_msglen = len;
	route_proto.sp_protocol = dst->sa_family;
	raw_input(m, &route_proto, &route_src, &route_dst);
}

#include "kinfo.h"
struct walkarg {
	int	w_op, w_arg;
	int	w_given, w_needed;
	caddr_t	w_where;
	struct	{
		struct rt_msghdr m_rtm;
		char	m_sabuf[128];
	} w_m;
#define w_rtm w_m.m_rtm
};
/*
 * This is used in dumping the kernel table via getkinfo().
 */
rt_dumpentry(rn, w)
	struct radix_node *rn;
	register struct walkarg *w;
{
	register struct sockaddr *sa;
	int n, error;

    for (; rn; rn = rn->rn_dupedkey) {
	int count = 0, size = sizeof(w->w_rtm);
	register struct rtentry *rt = (struct rtentry *)rn;

	if (rn->rn_flags & RNF_ROOT)
		continue;
	if (w->w_op == KINFO_RT_FLAGS && !(rt->rt_flags & w->w_arg))
		continue;
#define next(a, l) {size += (l); w->w_rtm.rtm_addrs |= (a); }
	w->w_rtm.rtm_addrs = 0;
	if (sa = rt_key(rt))
		next(RTA_DST, ROUNDUP(sa->sa_len));
	if (sa = rt->rt_gateway)
		next(RTA_GATEWAY, ROUNDUP(sa->sa_len));
	if (sa = rt_mask(rt))
		next(RTA_NETMASK, ROUNDUP(sa->sa_len));
	if (sa = rt->rt_genmask)
		next(RTA_GENMASK, ROUNDUP(sa->sa_len));
	w->w_needed += size;
	if (w->w_where == NULL || w->w_needed > 0)
		continue;
	w->w_rtm.rtm_msglen = size;
	w->w_rtm.rtm_flags = rt->rt_flags;
	w->w_rtm.rtm_use = rt->rt_use;
	w->w_rtm.rtm_rmx = rt->rt_rmx;
	w->w_rtm.rtm_index = rt->rt_ifp->if_index;
#undef next
#define next(l) {n = (l); Bcopy(sa, cp, n); cp += n;}
	if (size <= sizeof(w->w_m)) {
		register caddr_t cp = (caddr_t)(w->w_m.m_sabuf);
		if (sa = rt_key(rt))
			next(ROUNDUP(sa->sa_len));
		if (sa = rt->rt_gateway)
			next(ROUNDUP(sa->sa_len));
		if (sa = rt_mask(rt))
			next(ROUNDUP(sa->sa_len));
		if (sa = rt->rt_genmask)
			next(ROUNDUP(sa->sa_len));
#undef next
#define next(s, l) {n = (l); \
    if (error = copyout((caddr_t)(s), w->w_where, n)) return (error); \
    w->w_where += n;}

		next(&w->w_m, size); /* Copy rtmsg and sockaddrs back */
		continue;
	}
	next(&w->w_rtm, sizeof(w->w_rtm));
	if (sa = rt_key(rt))
		next(sa, ROUNDUP(sa->sa_len));
	if (sa = rt->rt_gateway)
		next(sa, ROUNDUP(sa->sa_len));
	if (sa = rt_mask(rt))
		next(sa, ROUNDUP(sa->sa_len));
	if (sa = rt->rt_genmask)
		next(sa, ROUNDUP(sa->sa_len));
    }
	return (0);
#undef next
}

kinfo_rtable(op, where, given, arg, needed)
	int	op, arg;
	caddr_t	where;
	int	*given, *needed;
{
	register struct radix_node_head *rnh;
	int	s, error = 0;
	u_char  af = ki_af(op);
	struct	walkarg w;

	op &= 0xffff;
	if (op != KINFO_RT_DUMP && op != KINFO_RT_FLAGS)
		return (EINVAL);

	Bzero(&w, sizeof(w));
	if ((w.w_where = where) && given)
		w.w_given = *given;
	w.w_needed = 0 - w.w_given;
	w.w_arg = arg;
	w.w_op = op;
	w.w_rtm.rtm_version = RTM_VERSION;
	w.w_rtm.rtm_type = RTM_GET;

	s = splnet();
	for (rnh = radix_node_head; rnh; rnh = rnh->rnh_next) {
		if (rnh->rnh_af == 0)
			continue;
		if (af && af != rnh->rnh_af)
			continue;
		error = rt_walk(rnh->rnh_treetop, rt_dumpentry, &w);
		if (error)
			break;
	}
	w.w_needed += w.w_given;
	if (where && given)
		*given = w.w_where - where;
	else
		w.w_needed = (11 * w.w_needed) / 10;
	*needed = w.w_needed;
	splx(s);
	return (error);
}

rt_walk(rn, f, w)
	register struct radix_node *rn;
	register int (*f)();
	struct walkarg *w;
{
	int error;
	for (;;) {
		while (rn->rn_b >= 0)
			rn = rn->rn_l;	/* First time through node, go left */
		if (error = (*f)(rn, w))
			return (error);	/* Process Leaf */
		while (rn->rn_p->rn_r == rn) {	/* if coming back from right */
			rn = rn->rn_p;		/* go back up */
			if (rn->rn_flags & RNF_ROOT)
				return 0;
		}
		rn = rn->rn_p->rn_r;		/* otherwise, go right*/
	}
}

/*
 * Definitions of protocols supported in the ROUTE domain.
 */

int	raw_init(),raw_usrreq(),raw_input(),raw_ctlinput();
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,
}
};

int	unp_externalize(), unp_dispose();

struct domain routedomain =
    { PF_ROUTE, "route", 0, 0, 0,
      routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };
Commit	Line	Data
e831d540 KS	1	/*
	2	* Copyright (c) 1988 Regents of the University of California.
	3	* All rights reserved.
	4	*
dbf0c423	5	* %sccs.include.redist.c%
e831d540	6	*
371d5f56	7	* @(#)rtsock.c 7.15 (Berkeley) %G%
e831d540 KS	8	*/
e831d540 KS	9
e831d540 KS	10	#include "param.h"
e831d540 KS	11	#include "mbuf.h"
e831d540 KS	12	#include "user.h"
	13	#include "proc.h"
	14	#include "socket.h"
	15	#include "socketvar.h"
	16	#include "domain.h"
	17	#include "protosw.h"
	18	#include "errno.h"
	19
	20	#include "af.h"
a0d75f26	21	#include "if.h"
e831d540 KS	22	#include "route.h"
	23	#include "raw_cb.h"
	24
d301d150	25	#include "machine/mtpr.h"
e831d540	26
1d888e3b KS	27	struct sockaddr route_dst = { 2, PF_ROUTE, };
1d888e3b KS	28	struct sockaddr route_src = { 2, PF_ROUTE, };
b72a6efb KS	29	struct sockproto route_proto = { PF_ROUTE, };
b72a6efb KS	30
e831d540	31	/ARGSUSED/
a0d75f26	32	route_usrreq(so, req, m, nam, control)
e831d540 KS	33	register struct socket *so;
e831d540 KS	34	int req;
a0d75f26	35	struct mbuf m, nam, *control;
e831d540 KS	36	{
	37	register int error = 0;
	38	register struct rawcb *rp = sotorawcb(so);
67336957	39	int s;
b72a6efb KS	40	if (req == PRU_ATTACH) {
	41	MALLOC(rp, struct rawcb , sizeof(rp), M_PCB, M_WAITOK);
	42	if (so->so_pcb = (caddr_t)rp)
	43	bzero(so->so_pcb, sizeof(*rp));
	44
	45	}
e831d540 KS	46	if (req == PRU_DETACH && rp) {
	47	int af = rp->rcb_proto.sp_protocol;
	48	if (af == AF_INET)
	49	route_cb.ip_count--;
	50	else if (af == AF_NS)
	51	route_cb.ns_count--;
e831d540 KS	52	else if (af == AF_ISO)
e831d540 KS	53	route_cb.iso_count--;
e831d540 KS	54	route_cb.any_count--;
e831d540 KS	55	}
67336957	56	s = splnet();
a0d75f26	57	error = raw_usrreq(so, req, m, nam, control);
e831d540	58	rp = sotorawcb(so);
b72a6efb	59	if (req == PRU_ATTACH && rp) {
e831d540	60	int af = rp->rcb_proto.sp_protocol;
b72a6efb KS	61	if (error) {
b72a6efb KS	62	free((caddr_t)rp, M_PCB);
67336957	63	splx(s);
b72a6efb KS	64	return (error);
b72a6efb KS	65	}
e831d540 KS	66	if (af == AF_INET)
	67	route_cb.ip_count++;
	68	else if (af == AF_NS)
	69	route_cb.ns_count++;
e831d540 KS	70	else if (af == AF_ISO)
e831d540 KS	71	route_cb.iso_count++;
b72a6efb	72	rp->rcb_faddr = &route_src;
e831d540 KS	73	route_cb.any_count++;
e831d540 KS	74	soisconnected(so);
2e5be88b	75	so->so_options \|= SO_USELOOPBACK;
e831d540	76	}
67336957	77	splx(s);
e831d540 KS	78	return (error);
e831d540 KS	79	}
371d5f56 KS	80	#define ROUNDUP(a) \
	81	((a) > 0 ? (1 + (((a) - 1) \| (sizeof(long) - 1))) : sizeof(long))
	82	#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
e831d540	83
b72a6efb	84	/ARGSUSED/
e831d540 KS	85	route_output(m, so)
	86	register struct mbuf *m;
	87	struct socket *so;
	88	{
67336957	89	register struct rt_msghdr *rtm = 0;
e831d540	90	register struct rtentry *rt = 0;
a0d75f26	91	struct rtentry *saved_nrt = 0;
79e0ea5d	92	struct sockaddr dst = 0, gate = 0, netmask = 0, genmask = 0;
371d5f56	93	struct sockaddr ifpaddr = 0, ifaaddr;
79e0ea5d	94	caddr_t cp, lim;
b72a6efb	95	int len, error = 0;
d6bc9b28 KS	96	struct ifnet *ifp = 0;
	97	struct ifaddr *ifa;
	98	extern struct ifaddr ifaof_ifpforaddr(), ifa_ifwithroute();
e831d540	99
a0d75f26	100	#define senderr(e) { error = e; goto flush;}
79e0ea5d KS	101	if (m == 0 \|\| m->m_len < sizeof(long))
	102	return (ENOBUFS);
	103	if ((m = m_pullup(m, sizeof(long))) == 0)
32dfe9ab	104	return (ENOBUFS);
e831d540	105	if ((m->m_flags & M_PKTHDR) == 0)
32dfe9ab	106	panic("route_output");
e831d540	107	len = m->m_pkthdr.len;
67336957 KS	108	if (len < sizeof(*rtm) \|\|
67336957 KS	109	len != mtod(m, struct rt_msghdr *)->rtm_msglen)
a0d75f26	110	senderr(EINVAL);
e831d540 KS	111	R_Malloc(rtm, struct rt_msghdr *, len);
e831d540 KS	112	if (rtm == 0)
a0d75f26	113	senderr(ENOBUFS);
e831d540	114	m_copydata(m, 0, len, (caddr_t)rtm);
79e0ea5d	115	if (rtm->rtm_version != RTM_VERSION)
a0d75f26	116	senderr(EPROTONOSUPPORT);
e831d540	117	rtm->rtm_pid = u.u_procp->p_pid;
79e0ea5d	118	lim = len + (caddr_t) rtm;
e831d540	119	cp = (caddr_t) (rtm + 1);
79e0ea5d	120	if (rtm->rtm_addrs & RTA_DST) {
e831d540	121	dst = (struct sockaddr *)cp;
371d5f56	122	ADVANCE(cp, dst);
79e0ea5d KS	123	} else
	124	senderr(EINVAL);
	125	if ((rtm->rtm_addrs & RTA_GATEWAY) && cp < lim) {
e831d540	126	gate = (struct sockaddr *)cp;
371d5f56	127	ADVANCE(cp, gate);
e831d540	128	}
79e0ea5d	129	if ((rtm->rtm_addrs & RTA_NETMASK) && cp < lim) {
e831d540	130	netmask = (struct sockaddr *)cp;
371d5f56	131	ADVANCE(cp, netmask);
e831d540	132	}
79e0ea5d	133	if ((rtm->rtm_addrs & RTA_GENMASK) && cp < lim) {
d6bc9b28	134	struct radix_node t, rn_addmask();
79e0ea5d	135	genmask = (struct sockaddr *)cp;
371d5f56	136	ADVANCE(cp, genmask);
d6bc9b28 KS	137	t = rn_addmask(genmask, 1, 2);
	138	if (t && Bcmp(genmask, t->rn_key, (u_char )genmask) == 0)
	139	genmask = (struct sockaddr *)(t->rn_key);
	140	else
	141	senderr(ENOBUFS);
	142	}
	143	if ((rtm->rtm_addrs & RTA_IFP) && cp < lim) {
	144	ifpaddr = (struct sockaddr *)cp;
e831d540 KS	145	}
	146	switch (rtm->rtm_type) {
	147	case RTM_ADD:
79e0ea5d KS	148	if (gate == 0)
79e0ea5d KS	149	senderr(EINVAL);
e831d540 KS	150	error = rtrequest(RTM_ADD, dst, gate, netmask,
e831d540 KS	151	rtm->rtm_flags, &saved_nrt);
79e0ea5d KS	152	if (error == 0 && saved_nrt) {
	153	rt_setmetrics(rtm->rtm_inits,
	154	&rtm->rtm_rmx, &saved_nrt->rt_rmx);
a0d75f26	155	saved_nrt->rt_refcnt--;
d6bc9b28	156	saved_nrt->rt_genmask = genmask;
79e0ea5d	157	}
e831d540 KS	158	break;
	159
	160	case RTM_DELETE:
	161	error = rtrequest(RTM_DELETE, dst, gate, netmask,
b72a6efb	162	rtm->rtm_flags, (struct rtentry **)0);
e831d540 KS	163	break;
	164
	165	case RTM_GET:
	166	case RTM_CHANGE:
	167	case RTM_LOCK:
	168	rt = rtalloc1(dst, 0);
	169	if (rt == 0)
a0d75f26	170	senderr(ESRCH);
f3de5579 KS	171	if (((struct radix_node *)rt)->rn_dupedkey) {
	172	if (netmask == 0 && rtm->rtm_type != RTM_GET)
	173	senderr(ETOOMANYREFS);
	174	}
e831d540	175	switch(rtm->rtm_type) {
e831d540 KS	176
e831d540 KS	177	case RTM_GET:
371d5f56 KS	178	dst = rt_key(rt); len = sizeof(*rtm);
371d5f56 KS	179	ADVANCE(len, dst);
f3de5579 KS	180	rtm->rtm_addrs \|= RTA_DST;
f3de5579 KS	181	if (gate = rt->rt_gateway) {
371d5f56	182	ADVANCE(len, gate);
79e0ea5d	183	rtm->rtm_addrs \|= RTA_GATEWAY;
f3de5579 KS	184	} else
	185	rtm->rtm_addrs &= ~RTA_GATEWAY;
	186	if (netmask = rt_mask(rt)) {
371d5f56	187	ADVANCE(len, netmask);
79e0ea5d	188	rtm->rtm_addrs \|= RTA_NETMASK;
f3de5579 KS	189	} else
f3de5579 KS	190	rtm->rtm_addrs &= ~RTA_NETMASK;
371d5f56 KS	191	if (genmask = rt->rt_genmask) {
371d5f56 KS	192	ADVANCE(len, genmask);
f3de5579 KS	193	rtm->rtm_addrs \|= RTA_GENMASK;
	194	} else
	195	rtm->rtm_addrs &= ~RTA_GENMASK;
371d5f56 KS	196	if (rtm->rtm_addrs & (RTA_IFP \| RTA_IFA)) {
	197	if (rt->rt_ifp == 0)
	198	goto badif;
	199	for (ifa = rt->rt_ifp->if_addrlist;
	200	ifa && ifa->ifa_addr->sa_family != AF_LINK;
	201	ifa = ifa->ifa_next){}
	202	if (ifa && rt->rt_ifa) {
	203	ifpaddr = ifa->ifa_addr;
	204	ADVANCE(len, ifpaddr);
	205	ifaaddr = rt->rt_ifa->ifa_addr;
	206	ADVANCE(len, ifaaddr);
	207	rtm->rtm_addrs \|= RTA_IFP \| RTA_IFA;
	208	} else {
	209	badif: ifpaddr = 0;
	210	rtm->rtm_addrs &= ~(RTA_IFP \| RTA_IFA);
	211	}
	212	}
e831d540 KS	213	if (len > rtm->rtm_msglen) {
	214	struct rt_msghdr *new_rtm;
	215	R_Malloc(new_rtm, struct rt_msghdr *, len);
	216	if (new_rtm == 0)
a0d75f26	217	senderr(ENOBUFS);
e831d540 KS	218	Bcopy(rtm, new_rtm, rtm->rtm_msglen);
e831d540 KS	219	Free(rtm); rtm = new_rtm;
f3de5579 KS	220	}
	221	rtm->rtm_msglen = len;
	222	rtm->rtm_flags = rt->rt_flags;
	223	rtm->rtm_rmx = rt->rt_rmx;
	224	cp = (caddr_t) (1 + rtm);
371d5f56 KS	225	len = ROUNDUP(dst->sa_len);
371d5f56 KS	226	Bcopy(dst, cp, len); cp += len;
f3de5579	227	if (gate) {
371d5f56 KS	228	len = ROUNDUP(gate->sa_len);
371d5f56 KS	229	Bcopy(gate, cp, len); cp += len;
f3de5579 KS	230	}
f3de5579 KS	231	if (netmask) {
371d5f56 KS	232	len = ROUNDUP(netmask->sa_len);
371d5f56 KS	233	Bcopy(netmask, cp, len); cp += len;
f3de5579	234	}
371d5f56 KS	235	if (genmask) {
	236	len = ROUNDUP(genmask->sa_len);
	237	Bcopy(genmask, cp, len); cp += len;
	238	}
	239	if (ifpaddr) {
	240	len = ROUNDUP(ifpaddr->sa_len);
	241	Bcopy(ifpaddr, cp, len); cp += len;
	242	len = ROUNDUP(ifaaddr->sa_len);
	243	Bcopy(ifaaddr, cp, len); cp += len;
e831d540 KS	244	}
	245	break;
	246
	247	case RTM_CHANGE:
f3de5579 KS	248	if (gate &&
f3de5579 KS	249	(gate->sa_len > (len = rt->rt_gateway->sa_len)))
a0d75f26 KS	250	senderr(EDQUOT);
a0d75f26 KS	251	if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
d6bc9b28 KS	252	rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt, gate);
	253	/* new gateway could require new ifaddr, ifp;
	254	flags may also be different; ifp may be specified
	255	by ll sockaddr when protocol address is ambiguous */
	256	if (ifpaddr &&
	257	(ifa = ifa_ifwithnet(ifpaddr)) &&
	258	(ifp = ifa->ifa_ifp) &&
	259	(ifa = ifaof_ifpforaddr(gate, ifp))) {
	260	/* We got it */
	261	} else {
	262	ifa = 0; ifp = 0;
	263	}
f3de5579 KS	264	if (gate)
f3de5579 KS	265	Bcopy(gate, rt->rt_gateway, len);
79e0ea5d KS	266	rt_setmetrics(rtm->rtm_inits,
79e0ea5d KS	267	&rtm->rtm_rmx, &rt->rt_rmx);
d6bc9b28 KS	268	if (ifa == 0)
	269	ifa = ifa_ifwithroute(rt->rt_flags, rt_key(rt),
	270	gate);
	271	if (ifa) {
	272	if (rt->rt_ifa != ifa) {
	273	rt->rt_ifa = ifa;
	274	rt->rt_ifp = ifa->ifa_ifp;
	275	}
	276	}
	277	if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
	278	rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate);
	279	if (genmask)
	280	rt->rt_genmask = genmask;
e831d540 KS	281	/*
	282	* Fall into
	283	*/
79e0ea5d KS	284	case RTM_LOCK:
	285	rt->rt_rmx.rmx_locks \|=
	286	(rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
	287	rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
e831d540	288	break;
e831d540 KS	289	}
	290	goto cleanup;
	291
	292	default:
a0d75f26	293	senderr(EOPNOTSUPP);
e831d540 KS	294	}
	295
	296	flush:
	297	if (rtm) {
	298	if (error)
	299	rtm->rtm_errno = error;
	300	else
	301	rtm->rtm_flags \|= RTF_DONE;
	302	}
	303	cleanup:
	304	if (rt)
	305	rtfree(rt);
2e5be88b KS	306	{
	307	register struct rawcb *rp = 0;
	308	/*
	309	* Check to see if we don't want our own messages.
	310	*/
	311	if ((so->so_options & SO_USELOOPBACK) == 0) {
	312	if (route_cb.any_count <= 1) {
	313	if (rtm)
	314	Free(rtm);
	315	m_freem(m);
	316	return (error);
	317	}
	318	/* There is another listener, so construct message */
	319	rp = sotorawcb(so);
	320	}
371d5f56 KS	321	if (rtm) {
371d5f56 KS	322	m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
32dfe9ab KS	323	Free(rtm);
32dfe9ab KS	324	}
2e5be88b KS	325	if (rp)
2e5be88b KS	326	rp->rcb_proto.sp_family = 0; /* Avoid us */
f3de5579 KS	327	if (dst)
f3de5579 KS	328	route_proto.sp_protocol = dst->sa_family;
32dfe9ab	329	raw_input(m, &route_proto, &route_src, &route_dst);
2e5be88b KS	330	if (rp)
	331	rp->rcb_proto.sp_family = PF_ROUTE;
	332	}
e831d540 KS	333	return (error);
	334	}
	335
d6bc9b28	336	rt_setmetrics(which, in, out)
79e0ea5d KS	337	u_long which;
	338	register struct rt_metrics in, out;
	339	{
	340	#define metric(f, e) if (which & (f)) out->e = in->e;
	341	metric(RTV_RPIPE, rmx_recvpipe);
	342	metric(RTV_SPIPE, rmx_sendpipe);
	343	metric(RTV_SSTHRESH, rmx_ssthresh);
	344	metric(RTV_RTT, rmx_rtt);
	345	metric(RTV_RTTVAR, rmx_rttvar);
	346	metric(RTV_HOPCOUNT, rmx_hopcount);
	347	metric(RTV_MTU, rmx_mtu);
	348	#undef metric
	349	}
	350
e831d540 KS	351	/*
	352	* Copy data from a buffer back into the indicated mbuf chain,
	353	* starting "off" bytes from the beginning, extending the mbuf
	354	* chain if necessary.
	355	*/
	356	m_copyback(m0, off, len, cp)
	357	struct mbuf *m0;
	358	register int off;
	359	register int len;
	360	caddr_t cp;
	361
	362	{
	363	register int mlen;
	364	register struct mbuf m = m0, n;
	365	int totlen = 0;
	366
	367	if (m0 == 0)
	368	return;
	369	while (off >= (mlen = m->m_len)) {
	370	off -= mlen;
	371	totlen += mlen;
	372	if (m->m_next == 0) {
	373	n = m_getclr(M_DONTWAIT, m->m_type);
	374	if (n == 0)
	375	goto out;
	376	n->m_len = min(MLEN, len + off);
	377	m->m_next = n;
	378	}
	379	m = m->m_next;
	380	}
	381	while (len > 0) {
	382	mlen = min (m->m_len - off, len);
b72a6efb	383	bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen);
e831d540 KS	384	cp += mlen;
	385	len -= mlen;
	386	mlen += off;
	387	off = 0;
	388	totlen += mlen;
	389	if (len == 0)
	390	break;
	391	if (m->m_next == 0) {
	392	n = m_get(M_DONTWAIT, m->m_type);
	393	if (n == 0)
	394	break;
	395	n->m_len = min(MLEN, len);
	396	m->m_next = n;
	397	}
	398	m = m->m_next;
	399	}
	400	out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen))
	401	m->m_pkthdr.len = totlen;
	402	}
	403
	404	/*
	405	* The miss message and losing message are very similar.
	406	*/
	407
b72a6efb	408	rt_missmsg(type, dst, gate, mask, src, flags, error)
e831d540 KS	409	register struct sockaddr *dst;
	410	struct sockaddr gate, mask, *src;
	411	{
	412	register struct rt_msghdr *rtm;
	413	register struct mbuf *m;
	414	int dlen = ROUNDUP(dst->sa_len);
	415	int len = dlen + sizeof(*rtm);
e831d540 KS	416
	417	if (route_cb.any_count == 0)
	418	return;
	419	m = m_gethdr(M_DONTWAIT, MT_DATA);
	420	if (m == 0)
	421	return;
	422	m->m_pkthdr.len = m->m_len = min(len, MHLEN);
	423	m->m_pkthdr.rcvif = 0;
	424	rtm = mtod(m, struct rt_msghdr *);
	425	bzero((caddr_t)rtm, sizeof(rtm)); /XXX assumes sizeof(rtm) < MHLEN/
	426	rtm->rtm_flags = RTF_DONE \| flags;
	427	rtm->rtm_msglen = len;
79e0ea5d	428	rtm->rtm_version = RTM_VERSION;
e831d540	429	rtm->rtm_type = type;
79e0ea5d	430	rtm->rtm_addrs = RTA_DST;
e831d540	431	if (type == RTM_OLDADD \|\| type == RTM_OLDDEL) {
e831d540	432	rtm->rtm_pid = u.u_procp->p_pid;
e831d540 KS	433	}
	434	m_copyback(m, sizeof (*rtm), dlen, (caddr_t)dst);
	435	if (gate) {
	436	dlen = ROUNDUP(gate->sa_len);
	437	m_copyback(m, len , dlen, (caddr_t)gate);
	438	len += dlen;
79e0ea5d	439	rtm->rtm_addrs \|= RTA_GATEWAY;
e831d540 KS	440	}
e831d540 KS	441	if (mask) {
371d5f56	442	dlen = ROUNDUP(mask->sa_len);
e831d540 KS	443	m_copyback(m, len , dlen, (caddr_t)mask);
e831d540 KS	444	len += dlen;
79e0ea5d	445	rtm->rtm_addrs \|= RTA_NETMASK;
e831d540 KS	446	}
	447	if (src) {
	448	dlen = ROUNDUP(src->sa_len);
	449	m_copyback(m, len , dlen, (caddr_t)src);
	450	len += dlen;
79e0ea5d	451	rtm->rtm_addrs \|= RTA_AUTHOR;
e831d540 KS	452	}
	453	if (m->m_pkthdr.len != len) {
	454	m_freem(m);
	455	return;
	456	}
b72a6efb	457	rtm->rtm_errno = error;
e831d540 KS	458	rtm->rtm_msglen = len;
	459	route_proto.sp_protocol = dst->sa_family;
	460	raw_input(m, &route_proto, &route_src, &route_dst);
	461	}
	462
a0d75f26	463	#include "kinfo.h"
a0d75f26 KS	464	struct walkarg {
	465	int w_op, w_arg;
	466	int w_given, w_needed;
	467	caddr_t w_where;
	468	struct {
	469	struct rt_msghdr m_rtm;
	470	char m_sabuf[128];
	471	} w_m;
	472	#define w_rtm w_m.m_rtm
	473	};
	474	/*
	475	* This is used in dumping the kernel table via getkinfo().
	476	*/
	477	rt_dumpentry(rn, w)
	478	struct radix_node *rn;
	479	register struct walkarg *w;
	480	{
	481	register struct sockaddr *sa;
	482	int n, error;
	483
2e5be88b	484	for (; rn; rn = rn->rn_dupedkey) {
a0d75f26 KS	485	int count = 0, size = sizeof(w->w_rtm);
	486	register struct rtentry rt = (struct rtentry )rn;
	487
2e5be88b KS	488	if (rn->rn_flags & RNF_ROOT)
2e5be88b KS	489	continue;
a0d75f26 KS	490	if (w->w_op == KINFO_RT_FLAGS && !(rt->rt_flags & w->w_arg))
a0d75f26 KS	491	continue;
79e0ea5d KS	492	#define next(a, l) {size += (l); w->w_rtm.rtm_addrs \|= (a); }
79e0ea5d KS	493	w->w_rtm.rtm_addrs = 0;
a0d75f26	494	if (sa = rt_key(rt))
79e0ea5d	495	next(RTA_DST, ROUNDUP(sa->sa_len));
a0d75f26	496	if (sa = rt->rt_gateway)
79e0ea5d KS	497	next(RTA_GATEWAY, ROUNDUP(sa->sa_len));
79e0ea5d KS	498	if (sa = rt_mask(rt))
371d5f56	499	next(RTA_NETMASK, ROUNDUP(sa->sa_len));
a0d75f26	500	if (sa = rt->rt_genmask)
79e0ea5d	501	next(RTA_GENMASK, ROUNDUP(sa->sa_len));
a0d75f26 KS	502	w->w_needed += size;
	503	if (w->w_where == NULL \|\| w->w_needed > 0)
	504	continue;
	505	w->w_rtm.rtm_msglen = size;
a0d75f26	506	w->w_rtm.rtm_flags = rt->rt_flags;
79e0ea5d KS	507	w->w_rtm.rtm_use = rt->rt_use;
	508	w->w_rtm.rtm_rmx = rt->rt_rmx;
	509	w->w_rtm.rtm_index = rt->rt_ifp->if_index;
	510	#undef next
	511	#define next(l) {n = (l); Bcopy(sa, cp, n); cp += n;}
a0d75f26 KS	512	if (size <= sizeof(w->w_m)) {
a0d75f26 KS	513	register caddr_t cp = (caddr_t)(w->w_m.m_sabuf);
a0d75f26	514	if (sa = rt_key(rt))
79e0ea5d	515	next(ROUNDUP(sa->sa_len));
a0d75f26	516	if (sa = rt->rt_gateway)
79e0ea5d KS	517	next(ROUNDUP(sa->sa_len));
79e0ea5d KS	518	if (sa = rt_mask(rt))
371d5f56	519	next(ROUNDUP(sa->sa_len));
a0d75f26	520	if (sa = rt->rt_genmask)
79e0ea5d	521	next(ROUNDUP(sa->sa_len));
a0d75f26	522	#undef next
79e0ea5d KS	523	#define next(s, l) {n = (l); \
	524	if (error = copyout((caddr_t)(s), w->w_where, n)) return (error); \
	525	w->w_where += n;}
a0d75f26 KS	526
	527	next(&w->w_m, size); /* Copy rtmsg and sockaddrs back */
	528	continue;
	529	}
	530	next(&w->w_rtm, sizeof(w->w_rtm));
	531	if (sa = rt_key(rt))
	532	next(sa, ROUNDUP(sa->sa_len));
	533	if (sa = rt->rt_gateway)
	534	next(sa, ROUNDUP(sa->sa_len));
79e0ea5d	535	if (sa = rt_mask(rt))
371d5f56	536	next(sa, ROUNDUP(sa->sa_len));
a0d75f26 KS	537	if (sa = rt->rt_genmask)
	538	next(sa, ROUNDUP(sa->sa_len));
	539	}
	540	return (0);
	541	#undef next
	542	}
	543
	544	kinfo_rtable(op, where, given, arg, needed)
	545	int op, arg;
	546	caddr_t where;
	547	int given, needed;
	548	{
	549	register struct radix_node_head *rnh;
	550	int s, error = 0;
	551	u_char af = ki_af(op);
	552	struct walkarg w;
	553
	554	op &= 0xffff;
	555	if (op != KINFO_RT_DUMP && op != KINFO_RT_FLAGS)
	556	return (EINVAL);
	557
	558	Bzero(&w, sizeof(w));
	559	if ((w.w_where = where) && given)
	560	w.w_given = *given;
	561	w.w_needed = 0 - w.w_given;
	562	w.w_arg = arg;
	563	w.w_op = op;
79e0ea5d	564	w.w_rtm.rtm_version = RTM_VERSION;
a0d75f26 KS	565	w.w_rtm.rtm_type = RTM_GET;
	566
	567	s = splnet();
	568	for (rnh = radix_node_head; rnh; rnh = rnh->rnh_next) {
	569	if (rnh->rnh_af == 0)
	570	continue;
	571	if (af && af != rnh->rnh_af)
	572	continue;
	573	error = rt_walk(rnh->rnh_treetop, rt_dumpentry, &w);
	574	if (error)
	575	break;
	576	}
	577	w.w_needed += w.w_given;
	578	if (where && given)
	579	*given = w.w_where - where;
	580	else
	581	w.w_needed = (11 * w.w_needed) / 10;
	582	*needed = w.w_needed;
	583	splx(s);
	584	return (error);
	585	}
	586
	587	rt_walk(rn, f, w)
	588	register struct radix_node *rn;
	589	register int (*f)();
	590	struct walkarg *w;
	591	{
	592	int error;
	593	for (;;) {
	594	while (rn->rn_b >= 0)
	595	rn = rn->rn_l; /* First time through node, go left */
	596	if (error = (*f)(rn, w))
	597	return (error); /* Process Leaf */
	598	while (rn->rn_p->rn_r == rn) { /* if coming back from right */
	599	rn = rn->rn_p; /* go back up */
	600	if (rn->rn_flags & RNF_ROOT)
	601	return 0;
	602	}
	603	rn = rn->rn_p->rn_r; /* otherwise, go right*/
	604	}
	605	}
	606
e831d540 KS	607	/*
	608	* Definitions of protocols supported in the ROUTE domain.
	609	*/
	610
e831d540 KS	611	int raw_init(),raw_usrreq(),raw_input(),raw_ctlinput();
	612	extern struct domain routedomain; /* or at least forward */
	613
	614	struct protosw routesw[] = {
	615	{ SOCK_RAW, &routedomain, 0, PR_ATOMIC\|PR_ADDR,
	616	raw_input, route_output, raw_ctlinput, 0,
	617	route_usrreq,
	618	raw_init, 0, 0, 0,
e831d540 KS	619	}
	620	};
	621
	622	int unp_externalize(), unp_dispose();
	623
	624	struct domain routedomain =
	625	{ PF_ROUTE, "route", 0, 0, 0,
	626	routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };