[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	7.17 (Berkeley) %G%
 */

#include "param.h"
#include "mbuf.h"
#include "proc.h"
#include "socket.h"
#include "socketvar.h"
#include "domain.h"
#include "protosw.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 = 0;
	caddr_t cp, lim;
	int len, error = 0;
	struct ifnet *ifp = 0;
	struct ifaddr *ifa = 0;
	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 = curproc->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;
		ADVANCE(cp, ifpaddr);
	}
	if ((rtm->rtm_addrs & RTA_IFA) && cp < lim)  {
		ifaaddr = (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 (rtm->rtm_type != RTM_GET) {
			if (Bcmp(dst, rt_key(rt), dst->sa_len) != 0)
				senderr(ESRCH);
			if (rt->rt_nodes->rn_dupedkey &&
			    (netmask == 0 ||
			     Bcmp(netmask, rt_mask(rt), netmask->sa_len)))
				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);
			/* 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);
				    rt->rt_ifa = ifa;
				    rt->rt_ifp = ifp;
				}
			}
			if (gate)
				Bcopy(gate, rt->rt_gateway, len);
			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 & 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 = curproc->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	*
31c32e48	7	* @(#)rtsock.c 7.17 (Berkeley) %G%
e831d540 KS	8	*/
e831d540 KS	9
e831d540 KS	10	#include "param.h"
e831d540 KS	11	#include "mbuf.h"
e831d540 KS	12	#include "proc.h"
	13	#include "socket.h"
	14	#include "socketvar.h"
	15	#include "domain.h"
	16	#include "protosw.h"
e831d540 KS	17
e831d540 KS	18	#include "af.h"
a0d75f26	19	#include "if.h"
e831d540 KS	20	#include "route.h"
	21	#include "raw_cb.h"
	22
d301d150	23	#include "machine/mtpr.h"
e831d540	24
1d888e3b KS	25	struct sockaddr route_dst = { 2, PF_ROUTE, };
1d888e3b KS	26	struct sockaddr route_src = { 2, PF_ROUTE, };
b72a6efb KS	27	struct sockproto route_proto = { PF_ROUTE, };
b72a6efb KS	28
e831d540	29	/ARGSUSED/
a0d75f26	30	route_usrreq(so, req, m, nam, control)
e831d540 KS	31	register struct socket *so;
e831d540 KS	32	int req;
a0d75f26	33	struct mbuf m, nam, *control;
e831d540 KS	34	{
	35	register int error = 0;
	36	register struct rawcb *rp = sotorawcb(so);
67336957	37	int s;
b72a6efb KS	38	if (req == PRU_ATTACH) {
	39	MALLOC(rp, struct rawcb , sizeof(rp), M_PCB, M_WAITOK);
	40	if (so->so_pcb = (caddr_t)rp)
	41	bzero(so->so_pcb, sizeof(*rp));
	42
	43	}
e831d540 KS	44	if (req == PRU_DETACH && rp) {
	45	int af = rp->rcb_proto.sp_protocol;
	46	if (af == AF_INET)
	47	route_cb.ip_count--;
	48	else if (af == AF_NS)
	49	route_cb.ns_count--;
e831d540 KS	50	else if (af == AF_ISO)
e831d540 KS	51	route_cb.iso_count--;
e831d540 KS	52	route_cb.any_count--;
e831d540 KS	53	}
67336957	54	s = splnet();
a0d75f26	55	error = raw_usrreq(so, req, m, nam, control);
e831d540	56	rp = sotorawcb(so);
b72a6efb	57	if (req == PRU_ATTACH && rp) {
e831d540	58	int af = rp->rcb_proto.sp_protocol;
b72a6efb KS	59	if (error) {
b72a6efb KS	60	free((caddr_t)rp, M_PCB);
67336957	61	splx(s);
b72a6efb KS	62	return (error);
b72a6efb KS	63	}
e831d540 KS	64	if (af == AF_INET)
	65	route_cb.ip_count++;
	66	else if (af == AF_NS)
	67	route_cb.ns_count++;
e831d540 KS	68	else if (af == AF_ISO)
e831d540 KS	69	route_cb.iso_count++;
b72a6efb	70	rp->rcb_faddr = &route_src;
e831d540 KS	71	route_cb.any_count++;
e831d540 KS	72	soisconnected(so);
2e5be88b	73	so->so_options \|= SO_USELOOPBACK;
e831d540	74	}
67336957	75	splx(s);
e831d540 KS	76	return (error);
e831d540 KS	77	}
371d5f56 KS	78	#define ROUNDUP(a) \
	79	((a) > 0 ? (1 + (((a) - 1) \| (sizeof(long) - 1))) : sizeof(long))
	80	#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
e831d540	81
b72a6efb	82	/ARGSUSED/
e831d540 KS	83	route_output(m, so)
	84	register struct mbuf *m;
	85	struct socket *so;
	86	{
67336957	87	register struct rt_msghdr *rtm = 0;
e831d540	88	register struct rtentry *rt = 0;
a0d75f26	89	struct rtentry *saved_nrt = 0;
79e0ea5d	90	struct sockaddr dst = 0, gate = 0, netmask = 0, genmask = 0;
f157971f	91	struct sockaddr ifpaddr = 0, ifaaddr = 0;
79e0ea5d	92	caddr_t cp, lim;
b72a6efb	93	int len, error = 0;
d6bc9b28	94	struct ifnet *ifp = 0;
f157971f KS	95	struct ifaddr *ifa = 0;
f157971f KS	96	struct ifaddr ifaof_ifpforaddr(), ifa_ifwithroute();
e831d540	97
a0d75f26	98	#define senderr(e) { error = e; goto flush;}
79e0ea5d KS	99	if (m == 0 \|\| m->m_len < sizeof(long))
	100	return (ENOBUFS);
	101	if ((m = m_pullup(m, sizeof(long))) == 0)
32dfe9ab	102	return (ENOBUFS);
e831d540	103	if ((m->m_flags & M_PKTHDR) == 0)
32dfe9ab	104	panic("route_output");
e831d540	105	len = m->m_pkthdr.len;
67336957 KS	106	if (len < sizeof(*rtm) \|\|
67336957 KS	107	len != mtod(m, struct rt_msghdr *)->rtm_msglen)
a0d75f26	108	senderr(EINVAL);
e831d540 KS	109	R_Malloc(rtm, struct rt_msghdr *, len);
e831d540 KS	110	if (rtm == 0)
a0d75f26	111	senderr(ENOBUFS);
e831d540	112	m_copydata(m, 0, len, (caddr_t)rtm);
79e0ea5d	113	if (rtm->rtm_version != RTM_VERSION)
a0d75f26	114	senderr(EPROTONOSUPPORT);
31c32e48	115	rtm->rtm_pid = curproc->p_pid;
79e0ea5d	116	lim = len + (caddr_t) rtm;
e831d540	117	cp = (caddr_t) (rtm + 1);
79e0ea5d	118	if (rtm->rtm_addrs & RTA_DST) {
e831d540	119	dst = (struct sockaddr *)cp;
371d5f56	120	ADVANCE(cp, dst);
79e0ea5d KS	121	} else
	122	senderr(EINVAL);
	123	if ((rtm->rtm_addrs & RTA_GATEWAY) && cp < lim) {
e831d540	124	gate = (struct sockaddr *)cp;
371d5f56	125	ADVANCE(cp, gate);
e831d540	126	}
79e0ea5d	127	if ((rtm->rtm_addrs & RTA_NETMASK) && cp < lim) {
e831d540	128	netmask = (struct sockaddr *)cp;
371d5f56	129	ADVANCE(cp, netmask);
e831d540	130	}
79e0ea5d	131	if ((rtm->rtm_addrs & RTA_GENMASK) && cp < lim) {
d6bc9b28	132	struct radix_node t, rn_addmask();
79e0ea5d	133	genmask = (struct sockaddr *)cp;
371d5f56	134	ADVANCE(cp, genmask);
d6bc9b28 KS	135	t = rn_addmask(genmask, 1, 2);
	136	if (t && Bcmp(genmask, t->rn_key, (u_char )genmask) == 0)
	137	genmask = (struct sockaddr *)(t->rn_key);
	138	else
	139	senderr(ENOBUFS);
	140	}
	141	if ((rtm->rtm_addrs & RTA_IFP) && cp < lim) {
	142	ifpaddr = (struct sockaddr *)cp;
f157971f KS	143	ADVANCE(cp, ifpaddr);
	144	}
	145	if ((rtm->rtm_addrs & RTA_IFA) && cp < lim) {
	146	ifaaddr = (struct sockaddr *)cp;
e831d540 KS	147	}
	148	switch (rtm->rtm_type) {
	149	case RTM_ADD:
79e0ea5d KS	150	if (gate == 0)
79e0ea5d KS	151	senderr(EINVAL);
e831d540 KS	152	error = rtrequest(RTM_ADD, dst, gate, netmask,
e831d540 KS	153	rtm->rtm_flags, &saved_nrt);
79e0ea5d KS	154	if (error == 0 && saved_nrt) {
	155	rt_setmetrics(rtm->rtm_inits,
	156	&rtm->rtm_rmx, &saved_nrt->rt_rmx);
a0d75f26	157	saved_nrt->rt_refcnt--;
d6bc9b28	158	saved_nrt->rt_genmask = genmask;
79e0ea5d	159	}
e831d540 KS	160	break;
	161
	162	case RTM_DELETE:
	163	error = rtrequest(RTM_DELETE, dst, gate, netmask,
b72a6efb	164	rtm->rtm_flags, (struct rtentry **)0);
e831d540 KS	165	break;
	166
	167	case RTM_GET:
	168	case RTM_CHANGE:
	169	case RTM_LOCK:
	170	rt = rtalloc1(dst, 0);
	171	if (rt == 0)
a0d75f26	172	senderr(ESRCH);
f157971f KS	173	if (rtm->rtm_type != RTM_GET) {
	174	if (Bcmp(dst, rt_key(rt), dst->sa_len) != 0)
	175	senderr(ESRCH);
	176	if (rt->rt_nodes->rn_dupedkey &&
	177	(netmask == 0 \|\|
	178	Bcmp(netmask, rt_mask(rt), netmask->sa_len)))
f3de5579 KS	179	senderr(ETOOMANYREFS);
f3de5579 KS	180	}
e831d540	181	switch(rtm->rtm_type) {
e831d540 KS	182
e831d540 KS	183	case RTM_GET:
371d5f56 KS	184	dst = rt_key(rt); len = sizeof(*rtm);
371d5f56 KS	185	ADVANCE(len, dst);
f3de5579 KS	186	rtm->rtm_addrs \|= RTA_DST;
f3de5579 KS	187	if (gate = rt->rt_gateway) {
371d5f56	188	ADVANCE(len, gate);
79e0ea5d	189	rtm->rtm_addrs \|= RTA_GATEWAY;
f3de5579 KS	190	} else
	191	rtm->rtm_addrs &= ~RTA_GATEWAY;
	192	if (netmask = rt_mask(rt)) {
371d5f56	193	ADVANCE(len, netmask);
79e0ea5d	194	rtm->rtm_addrs \|= RTA_NETMASK;
f3de5579 KS	195	} else
f3de5579 KS	196	rtm->rtm_addrs &= ~RTA_NETMASK;
371d5f56 KS	197	if (genmask = rt->rt_genmask) {
371d5f56 KS	198	ADVANCE(len, genmask);
f3de5579 KS	199	rtm->rtm_addrs \|= RTA_GENMASK;
	200	} else
	201	rtm->rtm_addrs &= ~RTA_GENMASK;
371d5f56 KS	202	if (rtm->rtm_addrs & (RTA_IFP \| RTA_IFA)) {
	203	if (rt->rt_ifp == 0)
	204	goto badif;
	205	for (ifa = rt->rt_ifp->if_addrlist;
	206	ifa && ifa->ifa_addr->sa_family != AF_LINK;
	207	ifa = ifa->ifa_next){}
	208	if (ifa && rt->rt_ifa) {
	209	ifpaddr = ifa->ifa_addr;
	210	ADVANCE(len, ifpaddr);
	211	ifaaddr = rt->rt_ifa->ifa_addr;
	212	ADVANCE(len, ifaaddr);
	213	rtm->rtm_addrs \|= RTA_IFP \| RTA_IFA;
	214	} else {
	215	badif: ifpaddr = 0;
	216	rtm->rtm_addrs &= ~(RTA_IFP \| RTA_IFA);
	217	}
	218	}
e831d540 KS	219	if (len > rtm->rtm_msglen) {
	220	struct rt_msghdr *new_rtm;
	221	R_Malloc(new_rtm, struct rt_msghdr *, len);
	222	if (new_rtm == 0)
a0d75f26	223	senderr(ENOBUFS);
e831d540 KS	224	Bcopy(rtm, new_rtm, rtm->rtm_msglen);
e831d540 KS	225	Free(rtm); rtm = new_rtm;
f3de5579 KS	226	}
	227	rtm->rtm_msglen = len;
	228	rtm->rtm_flags = rt->rt_flags;
	229	rtm->rtm_rmx = rt->rt_rmx;
	230	cp = (caddr_t) (1 + rtm);
371d5f56 KS	231	len = ROUNDUP(dst->sa_len);
371d5f56 KS	232	Bcopy(dst, cp, len); cp += len;
f3de5579	233	if (gate) {
371d5f56 KS	234	len = ROUNDUP(gate->sa_len);
371d5f56 KS	235	Bcopy(gate, cp, len); cp += len;
f3de5579 KS	236	}
f3de5579 KS	237	if (netmask) {
371d5f56 KS	238	len = ROUNDUP(netmask->sa_len);
371d5f56 KS	239	Bcopy(netmask, cp, len); cp += len;
f3de5579	240	}
371d5f56 KS	241	if (genmask) {
	242	len = ROUNDUP(genmask->sa_len);
	243	Bcopy(genmask, cp, len); cp += len;
	244	}
	245	if (ifpaddr) {
	246	len = ROUNDUP(ifpaddr->sa_len);
	247	Bcopy(ifpaddr, cp, len); cp += len;
	248	len = ROUNDUP(ifaaddr->sa_len);
	249	Bcopy(ifaaddr, cp, len); cp += len;
e831d540 KS	250	}
	251	break;
	252
	253	case RTM_CHANGE:
f3de5579 KS	254	if (gate &&
f3de5579 KS	255	(gate->sa_len > (len = rt->rt_gateway->sa_len)))
a0d75f26	256	senderr(EDQUOT);
d6bc9b28 KS	257	/* new gateway could require new ifaddr, ifp;
	258	flags may also be different; ifp may be specified
	259	by ll sockaddr when protocol address is ambiguous */
f157971f KS	260	if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) &&
	261	(ifp = ifa->ifa_ifp))
	262	ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate,
	263	ifp);
	264	else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) \|\|
	265	(ifa = ifa_ifwithroute(rt->rt_flags,
	266	rt_key(rt), gate)))
	267	ifp = ifa->ifa_ifp;
d6bc9b28	268	if (ifa) {
f157971f KS	269	register struct ifaddr *oifa = rt->rt_ifa;
	270	if (oifa != ifa) {
	271	if (oifa && oifa->ifa_rtrequest)
	272	oifa->ifa_rtrequest(RTM_DELETE,
	273	rt, gate);
d6bc9b28	274	rt->rt_ifa = ifa;
f157971f	275	rt->rt_ifp = ifp;
d6bc9b28 KS	276	}
d6bc9b28 KS	277	}
f157971f KS	278	if (gate)
	279	Bcopy(gate, rt->rt_gateway, len);
	280	rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
	281	&rt->rt_rmx);
d6bc9b28 KS	282	if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
	283	rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate);
	284	if (genmask)
	285	rt->rt_genmask = genmask;
e831d540 KS	286	/*
	287	* Fall into
	288	*/
79e0ea5d KS	289	case RTM_LOCK:
	290	rt->rt_rmx.rmx_locks \|=
	291	(rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
	292	rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
e831d540	293	break;
e831d540 KS	294	}
	295	goto cleanup;
	296
	297	default:
a0d75f26	298	senderr(EOPNOTSUPP);
e831d540 KS	299	}
	300
	301	flush:
	302	if (rtm) {
	303	if (error)
	304	rtm->rtm_errno = error;
	305	else
	306	rtm->rtm_flags \|= RTF_DONE;
	307	}
	308	cleanup:
	309	if (rt)
	310	rtfree(rt);
2e5be88b KS	311	{
	312	register struct rawcb *rp = 0;
	313	/*
	314	* Check to see if we don't want our own messages.
	315	*/
	316	if ((so->so_options & SO_USELOOPBACK) == 0) {
	317	if (route_cb.any_count <= 1) {
	318	if (rtm)
	319	Free(rtm);
	320	m_freem(m);
	321	return (error);
	322	}
	323	/* There is another listener, so construct message */
	324	rp = sotorawcb(so);
	325	}
371d5f56 KS	326	if (rtm) {
371d5f56 KS	327	m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
32dfe9ab KS	328	Free(rtm);
32dfe9ab KS	329	}
2e5be88b KS	330	if (rp)
2e5be88b KS	331	rp->rcb_proto.sp_family = 0; /* Avoid us */
f3de5579 KS	332	if (dst)
f3de5579 KS	333	route_proto.sp_protocol = dst->sa_family;
32dfe9ab	334	raw_input(m, &route_proto, &route_src, &route_dst);
2e5be88b KS	335	if (rp)
	336	rp->rcb_proto.sp_family = PF_ROUTE;
	337	}
e831d540 KS	338	return (error);
	339	}
	340
d6bc9b28	341	rt_setmetrics(which, in, out)
79e0ea5d KS	342	u_long which;
	343	register struct rt_metrics in, out;
	344	{
	345	#define metric(f, e) if (which & (f)) out->e = in->e;
	346	metric(RTV_RPIPE, rmx_recvpipe);
	347	metric(RTV_SPIPE, rmx_sendpipe);
	348	metric(RTV_SSTHRESH, rmx_ssthresh);
	349	metric(RTV_RTT, rmx_rtt);
	350	metric(RTV_RTTVAR, rmx_rttvar);
	351	metric(RTV_HOPCOUNT, rmx_hopcount);
	352	metric(RTV_MTU, rmx_mtu);
	353	#undef metric
	354	}
	355
e831d540 KS	356	/*
	357	* Copy data from a buffer back into the indicated mbuf chain,
	358	* starting "off" bytes from the beginning, extending the mbuf
	359	* chain if necessary.
	360	*/
	361	m_copyback(m0, off, len, cp)
	362	struct mbuf *m0;
	363	register int off;
	364	register int len;
	365	caddr_t cp;
	366
	367	{
	368	register int mlen;
	369	register struct mbuf m = m0, n;
	370	int totlen = 0;
	371
	372	if (m0 == 0)
	373	return;
31c32e48	374	while (off > (mlen = m->m_len)) {
e831d540 KS	375	off -= mlen;
	376	totlen += mlen;
	377	if (m->m_next == 0) {
	378	n = m_getclr(M_DONTWAIT, m->m_type);
	379	if (n == 0)
	380	goto out;
	381	n->m_len = min(MLEN, len + off);
	382	m->m_next = n;
	383	}
	384	m = m->m_next;
	385	}
	386	while (len > 0) {
	387	mlen = min (m->m_len - off, len);
b72a6efb	388	bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen);
e831d540 KS	389	cp += mlen;
	390	len -= mlen;
	391	mlen += off;
	392	off = 0;
	393	totlen += mlen;
	394	if (len == 0)
	395	break;
	396	if (m->m_next == 0) {
	397	n = m_get(M_DONTWAIT, m->m_type);
	398	if (n == 0)
	399	break;
	400	n->m_len = min(MLEN, len);
	401	m->m_next = n;
	402	}
	403	m = m->m_next;
	404	}
	405	out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen))
	406	m->m_pkthdr.len = totlen;
	407	}
	408
	409	/*
	410	* The miss message and losing message are very similar.
	411	*/
	412
b72a6efb	413	rt_missmsg(type, dst, gate, mask, src, flags, error)
e831d540 KS	414	register struct sockaddr *dst;
	415	struct sockaddr gate, mask, *src;
	416	{
	417	register struct rt_msghdr *rtm;
	418	register struct mbuf *m;
	419	int dlen = ROUNDUP(dst->sa_len);
	420	int len = dlen + sizeof(*rtm);
e831d540 KS	421
	422	if (route_cb.any_count == 0)
	423	return;
	424	m = m_gethdr(M_DONTWAIT, MT_DATA);
	425	if (m == 0)
	426	return;
	427	m->m_pkthdr.len = m->m_len = min(len, MHLEN);
	428	m->m_pkthdr.rcvif = 0;
	429	rtm = mtod(m, struct rt_msghdr *);
	430	bzero((caddr_t)rtm, sizeof(rtm)); /XXX assumes sizeof(rtm) < MHLEN/
	431	rtm->rtm_flags = RTF_DONE \| flags;
	432	rtm->rtm_msglen = len;
79e0ea5d	433	rtm->rtm_version = RTM_VERSION;
e831d540	434	rtm->rtm_type = type;
79e0ea5d	435	rtm->rtm_addrs = RTA_DST;
e831d540	436	if (type == RTM_OLDADD \|\| type == RTM_OLDDEL) {
31c32e48	437	rtm->rtm_pid = curproc->p_pid;
e831d540 KS	438	}
	439	m_copyback(m, sizeof (*rtm), dlen, (caddr_t)dst);
	440	if (gate) {
	441	dlen = ROUNDUP(gate->sa_len);
	442	m_copyback(m, len , dlen, (caddr_t)gate);
	443	len += dlen;
79e0ea5d	444	rtm->rtm_addrs \|= RTA_GATEWAY;
e831d540 KS	445	}
e831d540 KS	446	if (mask) {
371d5f56	447	dlen = ROUNDUP(mask->sa_len);
e831d540 KS	448	m_copyback(m, len , dlen, (caddr_t)mask);
e831d540 KS	449	len += dlen;
79e0ea5d	450	rtm->rtm_addrs \|= RTA_NETMASK;
e831d540 KS	451	}
	452	if (src) {
	453	dlen = ROUNDUP(src->sa_len);
	454	m_copyback(m, len , dlen, (caddr_t)src);
	455	len += dlen;
79e0ea5d	456	rtm->rtm_addrs \|= RTA_AUTHOR;
e831d540 KS	457	}
	458	if (m->m_pkthdr.len != len) {
	459	m_freem(m);
	460	return;
	461	}
b72a6efb	462	rtm->rtm_errno = error;
e831d540 KS	463	rtm->rtm_msglen = len;
	464	route_proto.sp_protocol = dst->sa_family;
	465	raw_input(m, &route_proto, &route_src, &route_dst);
	466	}
	467
a0d75f26	468	#include "kinfo.h"
a0d75f26 KS	469	struct walkarg {
	470	int w_op, w_arg;
	471	int w_given, w_needed;
	472	caddr_t w_where;
	473	struct {
	474	struct rt_msghdr m_rtm;
	475	char m_sabuf[128];
	476	} w_m;
	477	#define w_rtm w_m.m_rtm
	478	};
	479	/*
	480	* This is used in dumping the kernel table via getkinfo().
	481	*/
	482	rt_dumpentry(rn, w)
	483	struct radix_node *rn;
	484	register struct walkarg *w;
	485	{
	486	register struct sockaddr *sa;
	487	int n, error;
	488
2e5be88b	489	for (; rn; rn = rn->rn_dupedkey) {
a0d75f26 KS	490	int count = 0, size = sizeof(w->w_rtm);
	491	register struct rtentry rt = (struct rtentry )rn;
	492
2e5be88b KS	493	if (rn->rn_flags & RNF_ROOT)
2e5be88b KS	494	continue;
a0d75f26 KS	495	if (w->w_op == KINFO_RT_FLAGS && !(rt->rt_flags & w->w_arg))
a0d75f26 KS	496	continue;
79e0ea5d KS	497	#define next(a, l) {size += (l); w->w_rtm.rtm_addrs \|= (a); }
79e0ea5d KS	498	w->w_rtm.rtm_addrs = 0;
a0d75f26	499	if (sa = rt_key(rt))
79e0ea5d	500	next(RTA_DST, ROUNDUP(sa->sa_len));
a0d75f26	501	if (sa = rt->rt_gateway)
79e0ea5d KS	502	next(RTA_GATEWAY, ROUNDUP(sa->sa_len));
79e0ea5d KS	503	if (sa = rt_mask(rt))
371d5f56	504	next(RTA_NETMASK, ROUNDUP(sa->sa_len));
a0d75f26	505	if (sa = rt->rt_genmask)
79e0ea5d	506	next(RTA_GENMASK, ROUNDUP(sa->sa_len));
a0d75f26 KS	507	w->w_needed += size;
	508	if (w->w_where == NULL \|\| w->w_needed > 0)
	509	continue;
	510	w->w_rtm.rtm_msglen = size;
a0d75f26	511	w->w_rtm.rtm_flags = rt->rt_flags;
79e0ea5d KS	512	w->w_rtm.rtm_use = rt->rt_use;
	513	w->w_rtm.rtm_rmx = rt->rt_rmx;
	514	w->w_rtm.rtm_index = rt->rt_ifp->if_index;
	515	#undef next
	516	#define next(l) {n = (l); Bcopy(sa, cp, n); cp += n;}
a0d75f26 KS	517	if (size <= sizeof(w->w_m)) {
a0d75f26 KS	518	register caddr_t cp = (caddr_t)(w->w_m.m_sabuf);
a0d75f26	519	if (sa = rt_key(rt))
79e0ea5d	520	next(ROUNDUP(sa->sa_len));
a0d75f26	521	if (sa = rt->rt_gateway)
79e0ea5d KS	522	next(ROUNDUP(sa->sa_len));
79e0ea5d KS	523	if (sa = rt_mask(rt))
371d5f56	524	next(ROUNDUP(sa->sa_len));
a0d75f26	525	if (sa = rt->rt_genmask)
79e0ea5d	526	next(ROUNDUP(sa->sa_len));
a0d75f26	527	#undef next
79e0ea5d KS	528	#define next(s, l) {n = (l); \
	529	if (error = copyout((caddr_t)(s), w->w_where, n)) return (error); \
	530	w->w_where += n;}
a0d75f26 KS	531
	532	next(&w->w_m, size); /* Copy rtmsg and sockaddrs back */
	533	continue;
	534	}
	535	next(&w->w_rtm, sizeof(w->w_rtm));
	536	if (sa = rt_key(rt))
	537	next(sa, ROUNDUP(sa->sa_len));
	538	if (sa = rt->rt_gateway)
	539	next(sa, ROUNDUP(sa->sa_len));
79e0ea5d	540	if (sa = rt_mask(rt))
371d5f56	541	next(sa, ROUNDUP(sa->sa_len));
a0d75f26 KS	542	if (sa = rt->rt_genmask)
	543	next(sa, ROUNDUP(sa->sa_len));
	544	}
	545	return (0);
	546	#undef next
	547	}
	548
	549	kinfo_rtable(op, where, given, arg, needed)
	550	int op, arg;
	551	caddr_t where;
	552	int given, needed;
	553	{
	554	register struct radix_node_head *rnh;
	555	int s, error = 0;
	556	u_char af = ki_af(op);
	557	struct walkarg w;
	558
	559	op &= 0xffff;
	560	if (op != KINFO_RT_DUMP && op != KINFO_RT_FLAGS)
	561	return (EINVAL);
	562
	563	Bzero(&w, sizeof(w));
	564	if ((w.w_where = where) && given)
	565	w.w_given = *given;
	566	w.w_needed = 0 - w.w_given;
	567	w.w_arg = arg;
	568	w.w_op = op;
79e0ea5d	569	w.w_rtm.rtm_version = RTM_VERSION;
a0d75f26 KS	570	w.w_rtm.rtm_type = RTM_GET;
	571
	572	s = splnet();
	573	for (rnh = radix_node_head; rnh; rnh = rnh->rnh_next) {
	574	if (rnh->rnh_af == 0)
	575	continue;
	576	if (af && af != rnh->rnh_af)
	577	continue;
	578	error = rt_walk(rnh->rnh_treetop, rt_dumpentry, &w);
	579	if (error)
	580	break;
	581	}
	582	w.w_needed += w.w_given;
	583	if (where && given)
	584	*given = w.w_where - where;
	585	else
	586	w.w_needed = (11 * w.w_needed) / 10;
	587	*needed = w.w_needed;
	588	splx(s);
	589	return (error);
	590	}
	591
	592	rt_walk(rn, f, w)
	593	register struct radix_node *rn;
	594	register int (*f)();
	595	struct walkarg *w;
	596	{
	597	int error;
	598	for (;;) {
	599	while (rn->rn_b >= 0)
	600	rn = rn->rn_l; /* First time through node, go left */
	601	if (error = (*f)(rn, w))
	602	return (error); /* Process Leaf */
	603	while (rn->rn_p->rn_r == rn) { /* if coming back from right */
	604	rn = rn->rn_p; /* go back up */
	605	if (rn->rn_flags & RNF_ROOT)
	606	return 0;
	607	}
	608	rn = rn->rn_p->rn_r; /* otherwise, go right*/
	609	}
	610	}
	611
e831d540 KS	612	/*
	613	* Definitions of protocols supported in the ROUTE domain.
	614	*/
	615
e831d540 KS	616	int raw_init(),raw_usrreq(),raw_input(),raw_ctlinput();
	617	extern struct domain routedomain; /* or at least forward */
	618
	619	struct protosw routesw[] = {
	620	{ SOCK_RAW, &routedomain, 0, PR_ATOMIC\|PR_ADDR,
	621	raw_input, route_output, raw_ctlinput, 0,
	622	route_usrreq,
	623	raw_init, 0, 0, 0,
e831d540 KS	624	}
	625	};
	626
	627	int unp_externalize(), unp_dispose();
	628
	629	struct domain routedomain =
	630	{ PF_ROUTE, "route", 0, 0, 0,
	631	routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };