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File: [cvs.NetBSD.org] / src / sys / netinet / raw_ip.c (download)

Revision 1.91, Fri Sep 8 20:58:58 2006 UTC (7 years, 10 months ago) by elad
Branch: MAIN
CVS Tags: yamt-splraiseipl-base, yamt-pdpolicy-base9
Branch point for: yamt-splraiseipl
Changes since 1.90: +6 -4 lines

First take at security model abstraction.

- Add a few scopes to the kernel: system, network, and machdep.

- Add a few more actions/sub-actions (requests), and start using them as
  opposed to the KAUTH_GENERIC_ISSUSER place-holders.

- Introduce a basic set of listeners that implement our "traditional"
  security model, called "bsd44". This is the default (and only) model we
  have at the moment.

- Update all relevant documentation.

- Add some code and docs to help folks who want to actually use this stuff:

  * There's a sample overlay model, sitting on-top of "bsd44", for
    fast experimenting with tweaking just a subset of an existing model.

    This is pretty cool because it's *really* straightforward to do stuff
    you had to use ugly hacks for until now...

  * And of course, documentation describing how to do the above for quick
    reference, including code samples.

All of these changes were tested for regressions using a Python-based
testsuite that will be (I hope) available soon via pkgsrc. Information
about the tests, and how to write new ones, can be found on:

	http://kauth.linbsd.org/kauthwiki

NOTE FOR DEVELOPERS: *PLEASE* don't add any code that does any of the
following:

  - Uses a KAUTH_GENERIC_ISSUSER kauth(9) request,
  - Checks 'securelevel' directly,
  - Checks a uid/gid directly.

(or if you feel you have to, contact me first)

This is still work in progress; It's far from being done, but now it'll
be a lot easier.

Relevant mailing list threads:

http://mail-index.netbsd.org/tech-security/2006/01/25/0011.html
http://mail-index.netbsd.org/tech-security/2006/03/24/0001.html
http://mail-index.netbsd.org/tech-security/2006/04/18/0000.html
http://mail-index.netbsd.org/tech-security/2006/05/15/0000.html
http://mail-index.netbsd.org/tech-security/2006/08/01/0000.html
http://mail-index.netbsd.org/tech-security/2006/08/25/0000.html

Many thanks to YAMAMOTO Takashi, Matt Thomas, and Christos Zoulas for help
stablizing kauth(9).

Full credit for the regression tests, making sure these changes didn't break
anything, goes to Matt Fleming and Jaime Fournier.

Happy birthday Randi! :)

/*	$NetBSD: raw_ip.c,v 1.91 2006/09/08 20:58:58 elad Exp $	*/

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * 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. Neither the name of the project 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 PROJECT 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 PROJECT 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.
 */

/*
 * Copyright (c) 1982, 1986, 1988, 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. 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.
 *
 *	@(#)raw_ip.c	8.7 (Berkeley) 5/15/95
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.91 2006/09/08 20:58:58 elad Exp $");

#include "opt_inet.h"
#include "opt_ipsec.h"
#include "opt_mrouting.h"

#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/kauth.h>

#include <net/if.h>
#include <net/route.h>

#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/ip_mroute.h>
#include <netinet/ip_icmp.h>
#include <netinet/in_pcb.h>
#include <netinet/in_proto.h>
#include <netinet/in_var.h>

#include <machine/stdarg.h>

#ifdef IPSEC
#include <netinet6/ipsec.h>
#endif /*IPSEC*/

#ifdef FAST_IPSEC
#include <netipsec/ipsec.h>
#include <netipsec/ipsec_var.h>			/* XXX ipsecstat namespace */
#endif	/* FAST_IPSEC*/

struct inpcbtable rawcbtable;

int	 rip_pcbnotify(struct inpcbtable *, struct in_addr,
    struct in_addr, int, int, void (*)(struct inpcb *, int));
int	 rip_bind(struct inpcb *, struct mbuf *);
int	 rip_connect(struct inpcb *, struct mbuf *);
void	 rip_disconnect(struct inpcb *);

/*
 * Nominal space allocated to a raw ip socket.
 */
#define	RIPSNDQ		8192
#define	RIPRCVQ		8192

/*
 * Raw interface to IP protocol.
 */

/*
 * Initialize raw connection block q.
 */
void
rip_init(void)
{

	in_pcbinit(&rawcbtable, 1, 1);
}

/*
 * Setup generic address and protocol structures
 * for raw_input routine, then pass them along with
 * mbuf chain.
 */
void
rip_input(struct mbuf *m, ...)
{
	int proto;
	struct ip *ip = mtod(m, struct ip *);
	struct inpcb_hdr *inph;
	struct inpcb *inp;
	struct inpcb *last = 0;
	struct mbuf *opts = 0;
	struct sockaddr_in ripsrc;
	va_list ap;

	va_start(ap, m);
	(void)va_arg(ap, int);		/* ignore value, advance ap */
	proto = va_arg(ap, int);
	va_end(ap);

	ripsrc.sin_family = AF_INET;
	ripsrc.sin_len = sizeof(struct sockaddr_in);
	ripsrc.sin_addr = ip->ip_src;
	ripsrc.sin_port = 0;
	bzero((caddr_t)ripsrc.sin_zero, sizeof(ripsrc.sin_zero));

	/*
	 * XXX Compatibility: programs using raw IP expect ip_len
	 * XXX to have the header length subtracted, and in host order.
	 * XXX ip_off is also expected to be host order.
	 */
	ip->ip_len = ntohs(ip->ip_len) - (ip->ip_hl << 2);
	NTOHS(ip->ip_off);

	CIRCLEQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) {
		inp = (struct inpcb *)inph;
		if (inp->inp_af != AF_INET)
			continue;
		if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
			continue;
		if (!in_nullhost(inp->inp_laddr) &&
		    !in_hosteq(inp->inp_laddr, ip->ip_dst))
			continue;
		if (!in_nullhost(inp->inp_faddr) &&
		    !in_hosteq(inp->inp_faddr, ip->ip_src))
			continue;
		if (last) {
			struct mbuf *n;

#if defined(IPSEC) || defined(FAST_IPSEC)
			/* check AH/ESP integrity. */
			if (ipsec4_in_reject_so(m, last->inp_socket)) {
				ipsecstat.in_polvio++;
				/* do not inject data to pcb */
			} else
#endif /*IPSEC*/
			if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
				if (last->inp_flags & INP_CONTROLOPTS ||
				    last->inp_socket->so_options & SO_TIMESTAMP)
					ip_savecontrol(last, &opts, ip, n);
				if (sbappendaddr(&last->inp_socket->so_rcv,
				    sintosa(&ripsrc), n, opts) == 0) {
					/* should notify about lost packet */
					m_freem(n);
					if (opts)
						m_freem(opts);
				} else
					sorwakeup(last->inp_socket);
				opts = NULL;
			}
		}
		last = inp;
	}
#if defined(IPSEC) || defined(FAST_IPSEC)
	/* check AH/ESP integrity. */
	if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
		m_freem(m);
		ipsecstat.in_polvio++;
		ipstat.ips_delivered--;
		/* do not inject data to pcb */
	} else
#endif /*IPSEC*/
	if (last) {
		if (last->inp_flags & INP_CONTROLOPTS ||
		    last->inp_socket->so_options & SO_TIMESTAMP)
			ip_savecontrol(last, &opts, ip, m);
		if (sbappendaddr(&last->inp_socket->so_rcv,
		    sintosa(&ripsrc), m, opts) == 0) {
			m_freem(m);
			if (opts)
				m_freem(opts);
		} else
			sorwakeup(last->inp_socket);
	} else {
		if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
			icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL,
			    0, 0);
			ipstat.ips_noproto++;
			ipstat.ips_delivered--;
		} else
			m_freem(m);
	}
	return;
}

int
rip_pcbnotify(struct inpcbtable *table,
    struct in_addr faddr, struct in_addr laddr, int proto, int errno,
    void (*notify)(struct inpcb *, int))
{
	struct inpcb *inp, *ninp;
	int nmatch;

	nmatch = 0;
	for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue);
	    inp != (struct inpcb *)&table->inpt_queue;
	    inp = ninp) {
		ninp = (struct inpcb *)inp->inp_queue.cqe_next;
		if (inp->inp_af != AF_INET)
			continue;
		if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto)
			continue;
		if (in_hosteq(inp->inp_faddr, faddr) &&
		    in_hosteq(inp->inp_laddr, laddr)) {
			(*notify)(inp, errno);
			nmatch++;
		}
	}

	return nmatch;
}

void *
rip_ctlinput(int cmd, struct sockaddr *sa, void *v)
{
	struct ip *ip = v;
	void (*notify)(struct inpcb *, int) = in_rtchange;
	int errno;

	if (sa->sa_family != AF_INET ||
	    sa->sa_len != sizeof(struct sockaddr_in))
		return NULL;
	if ((unsigned)cmd >= PRC_NCMDS)
		return NULL;
	errno = inetctlerrmap[cmd];
	if (PRC_IS_REDIRECT(cmd))
		notify = in_rtchange, ip = 0;
	else if (cmd == PRC_HOSTDEAD)
		ip = 0;
	else if (errno == 0)
		return NULL;
	if (ip) {
		rip_pcbnotify(&rawcbtable, satosin(sa)->sin_addr,
		    ip->ip_src, ip->ip_p, errno, notify);

		/* XXX mapped address case */
	} else
		in_pcbnotifyall(&rawcbtable, satosin(sa)->sin_addr, errno,
		    notify);
	return NULL;
}

/*
 * Generate IP header and pass packet to ip_output.
 * Tack on options user may have setup with control call.
 */
int
rip_output(struct mbuf *m, ...)
{
	struct inpcb *inp;
	struct ip *ip;
	struct mbuf *opts;
	int flags;
	va_list ap;

	va_start(ap, m);
	inp = va_arg(ap, struct inpcb *);
	va_end(ap);

	flags =
	    (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
	    | IP_RETURNMTU;

	/*
	 * If the user handed us a complete IP packet, use it.
	 * Otherwise, allocate an mbuf for a header and fill it in.
	 */
	if ((inp->inp_flags & INP_HDRINCL) == 0) {
		if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
			m_freem(m);
			return (EMSGSIZE);
		}
		M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
		if (!m)
			return (ENOBUFS);
		ip = mtod(m, struct ip *);
		ip->ip_tos = 0;
		ip->ip_off = htons(0);
		ip->ip_p = inp->inp_ip.ip_p;
		ip->ip_len = htons(m->m_pkthdr.len);
		ip->ip_src = inp->inp_laddr;
		ip->ip_dst = inp->inp_faddr;
		ip->ip_ttl = MAXTTL;
		opts = inp->inp_options;
	} else {
		if (m->m_pkthdr.len > IP_MAXPACKET) {
			m_freem(m);
			return (EMSGSIZE);
		}
		ip = mtod(m, struct ip *);

		/*
		 * If the mbuf is read-only, we need to allocate
		 * a new mbuf for the header, since we need to
		 * modify the header.
		 */
		if (M_READONLY(m)) {
			int hlen = ip->ip_hl << 2;

			m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3);
			if (m == NULL)
				return (ENOMEM);	/* XXX */
			ip = mtod(m, struct ip *);
		}

		/* XXX userland passes ip_len and ip_off in host order */
		if (m->m_pkthdr.len != ip->ip_len) {
			m_freem(m);
			return (EINVAL);
		}
		HTONS(ip->ip_len);
		HTONS(ip->ip_off);
		if (ip->ip_id == 0)
			ip->ip_id = ip_newid();
		opts = NULL;
		/* XXX prevent ip_output from overwriting header fields */
		flags |= IP_RAWOUTPUT;
		ipstat.ips_rawout++;
	}
	return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions,
	     inp->inp_socket, &inp->inp_errormtu));
}

/*
 * Raw IP socket option processing.
 */
int
rip_ctloutput(int op, struct socket *so, int level, int optname,
    struct mbuf **m)
{
	struct inpcb *inp = sotoinpcb(so);
	int error = 0;

	if (level != IPPROTO_IP) {
		error = ENOPROTOOPT;
		if (op == PRCO_SETOPT && *m != 0)
			(void) m_free(*m);
	} else switch (op) {

	case PRCO_SETOPT:
		switch (optname) {
		case IP_HDRINCL:
			if (*m == 0 || (*m)->m_len < sizeof (int))
				error = EINVAL;
			else {
				if (*mtod(*m, int *))
					inp->inp_flags |= INP_HDRINCL;
				else
					inp->inp_flags &= ~INP_HDRINCL;
			}
			if (*m != 0)
				(void) m_free(*m);
			break;

#ifdef MROUTING
		case MRT_INIT:
		case MRT_DONE:
		case MRT_ADD_VIF:
		case MRT_DEL_VIF:
		case MRT_ADD_MFC:
		case MRT_DEL_MFC:
		case MRT_ASSERT:
		case MRT_API_CONFIG:
		case MRT_ADD_BW_UPCALL:
		case MRT_DEL_BW_UPCALL:
			error = ip_mrouter_set(so, optname, m);
			break;
#endif

		default:
			error = ip_ctloutput(op, so, level, optname, m);
			break;
		}
		break;

	case PRCO_GETOPT:
		switch (optname) {
		case IP_HDRINCL:
			*m = m_get(M_WAIT, MT_SOOPTS);
			MCLAIM((*m), so->so_mowner);
			(*m)->m_len = sizeof (int);
			*mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
			break;

#ifdef MROUTING
		case MRT_VERSION:
		case MRT_ASSERT:
		case MRT_API_SUPPORT:
		case MRT_API_CONFIG:
			error = ip_mrouter_get(so, optname, m);
			break;
#endif

		default:
			error = ip_ctloutput(op, so, level, optname, m);
			break;
		}
		break;
	}
	return (error);
}

int
rip_bind(struct inpcb *inp, struct mbuf *nam)
{
	struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);

	if (nam->m_len != sizeof(*addr))
		return (EINVAL);
	if (TAILQ_FIRST(&ifnet) == 0)
		return (EADDRNOTAVAIL);
	if (addr->sin_family != AF_INET &&
	    addr->sin_family != AF_IMPLINK)
		return (EAFNOSUPPORT);
	if (!in_nullhost(addr->sin_addr) &&
	    ifa_ifwithaddr(sintosa(addr)) == 0)
		return (EADDRNOTAVAIL);
	inp->inp_laddr = addr->sin_addr;
	return (0);
}

int
rip_connect(struct inpcb *inp, struct mbuf *nam)
{
	struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);

	if (nam->m_len != sizeof(*addr))
		return (EINVAL);
	if (TAILQ_FIRST(&ifnet) == 0)
		return (EADDRNOTAVAIL);
	if (addr->sin_family != AF_INET &&
	    addr->sin_family != AF_IMPLINK)
		return (EAFNOSUPPORT);
	inp->inp_faddr = addr->sin_addr;
	return (0);
}

void
rip_disconnect(struct inpcb *inp)
{

	inp->inp_faddr = zeroin_addr;
}

u_long	rip_sendspace = RIPSNDQ;
u_long	rip_recvspace = RIPRCVQ;

/*ARGSUSED*/
int
rip_usrreq(struct socket *so, int req,
    struct mbuf *m, struct mbuf *nam, struct mbuf *control, struct lwp *l)
{
	struct inpcb *inp;
	int s;
	int error = 0;
#ifdef MROUTING
	extern struct socket *ip_mrouter;
#endif

	if (req == PRU_CONTROL)
		return (in_control(so, (long)m, (caddr_t)nam,
		    (struct ifnet *)control, l));

	if (req == PRU_PURGEIF) {
		in_pcbpurgeif0(&rawcbtable, (struct ifnet *)control);
		in_purgeif((struct ifnet *)control);
		in_pcbpurgeif(&rawcbtable, (struct ifnet *)control);
		return (0);
	}

	s = splsoftnet();
	inp = sotoinpcb(so);
#ifdef DIAGNOSTIC
	if (req != PRU_SEND && req != PRU_SENDOOB && control)
		panic("rip_usrreq: unexpected control mbuf");
#endif
	if (inp == 0 && req != PRU_ATTACH) {
		error = EINVAL;
		goto release;
	}

	switch (req) {

	case PRU_ATTACH:
		if (inp != 0) {
			error = EISCONN;
			break;
		}
		if (l == 0 || (error = kauth_authorize_network(l->l_cred,
		    KAUTH_NETWORK_SOCKET,
		    (void *)KAUTH_REQ_NETWORK_SOCKET_RAWSOCK, so, NULL,
		    NULL))) {
			error = EACCES;
			break;
		}
		if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
			error = soreserve(so, rip_sendspace, rip_recvspace);
			if (error)
				break;
		}
		error = in_pcballoc(so, &rawcbtable);
		if (error)
			break;
		inp = sotoinpcb(so);
		inp->inp_ip.ip_p = (long)nam;
		break;

	case PRU_DETACH:
#ifdef MROUTING
		if (so == ip_mrouter)
			ip_mrouter_done();
#endif
		in_pcbdetach(inp);
		break;

	case PRU_BIND:
		error = rip_bind(inp, nam);
		break;

	case PRU_LISTEN:
		error = EOPNOTSUPP;
		break;

	case PRU_CONNECT:
		error = rip_connect(inp, nam);
		if (error)
			break;
		soisconnected(so);
		break;

	case PRU_CONNECT2:
		error = EOPNOTSUPP;
		break;

	case PRU_DISCONNECT:
		soisdisconnected(so);
		rip_disconnect(inp);
		break;

	/*
	 * Mark the connection as being incapable of further input.
	 */
	case PRU_SHUTDOWN:
		socantsendmore(so);
		break;

	case PRU_RCVD:
		error = EOPNOTSUPP;
		break;

	/*
	 * Ship a packet out.  The appropriate raw output
	 * routine handles any massaging necessary.
	 */
	case PRU_SEND:
		if (control && control->m_len) {
			m_freem(control);
			m_freem(m);
			error = EINVAL;
			break;
		}
	{
		if (nam) {
			if ((so->so_state & SS_ISCONNECTED) != 0) {
				error = EISCONN;
				goto die;
			}
			error = rip_connect(inp, nam);
			if (error) {
			die:
				m_freem(m);
				break;
			}
		} else {
			if ((so->so_state & SS_ISCONNECTED) == 0) {
				error = ENOTCONN;
				goto die;
			}
		}
		error = rip_output(m, inp);
		if (nam)
			rip_disconnect(inp);
	}
		break;

	case PRU_SENSE:
		/*
		 * stat: don't bother with a blocksize.
		 */
		splx(s);
		return (0);

	case PRU_RCVOOB:
		error = EOPNOTSUPP;
		break;

	case PRU_SENDOOB:
		m_freem(control);
		m_freem(m);
		error = EOPNOTSUPP;
		break;

	case PRU_SOCKADDR:
		in_setsockaddr(inp, nam);
		break;

	case PRU_PEERADDR:
		in_setpeeraddr(inp, nam);
		break;

	default:
		panic("rip_usrreq");
	}

release:
	splx(s);
	return (error);
}

SYSCTL_SETUP(sysctl_net_inet_raw_setup, "sysctl net.inet.raw subtree setup")
{

	sysctl_createv(clog, 0, NULL, NULL,
		       CTLFLAG_PERMANENT,
		       CTLTYPE_NODE, "net", NULL,
		       NULL, 0, NULL, 0,
		       CTL_NET, CTL_EOL);
	sysctl_createv(clog, 0, NULL, NULL,
		       CTLFLAG_PERMANENT,
		       CTLTYPE_NODE, "inet", NULL,
		       NULL, 0, NULL, 0,
		       CTL_NET, PF_INET, CTL_EOL);
	sysctl_createv(clog, 0, NULL, NULL,
		       CTLFLAG_PERMANENT,
		       CTLTYPE_NODE, "raw",
		       SYSCTL_DESCR("Raw IPv4 settings"),
		       NULL, 0, NULL, 0,
		       CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL);

	sysctl_createv(clog, 0, NULL, NULL,
		       CTLFLAG_PERMANENT,
		       CTLTYPE_STRUCT, "pcblist",
		       SYSCTL_DESCR("Raw IPv4 control block list"),
		       sysctl_inpcblist, 0, &rawcbtable, 0,
		       CTL_NET, PF_INET, IPPROTO_RAW,
		       CTL_CREATE, CTL_EOL);
}