text: /*
   * 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. 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.
   *
   *	@(#)raw_ip.c	8.7 (Berkeley) 5/15/95
   * $FreeBSD: src/sys/netinet/raw_ip.c,v 1.64.2.16 2003/08/24 08:24:38 hsu Exp $
   */
  
  #include "opt_inet6.h"
  #include "opt_ipsec.h"
  #include "opt_carp.h"
  
  #include <sys/param.h>
  #include <sys/systm.h>
  #include <sys/kernel.h>
  #include <sys/jail.h>
  #include <sys/malloc.h>
  #include <sys/mbuf.h>
  #include <sys/proc.h>
  #include <sys/priv.h>
  #include <sys/protosw.h>
  #include <sys/socket.h>
  #include <sys/socketvar.h>
  #include <sys/sysctl.h>
  
  #include <sys/thread2.h>
  #include <sys/socketvar2.h>
  #include <sys/msgport2.h>
  
  #include <machine/stdarg.h>
  
  #include <net/if.h>
  #ifdef CARP
  #include <net/if_types.h>
  #endif
  #include <net/route.h>
  
  #define _IP_VHL
  #include <netinet/in.h>
  #include <netinet/in_systm.h>
  #include <netinet/ip.h>
  #include <netinet/in_pcb.h>
  #include <netinet/in_var.h>
  #include <netinet/ip_var.h>
  
  #include <net/ip_mroute/ip_mroute.h>
  #include <net/ipfw/ip_fw.h>
  #include <net/dummynet/ip_dummynet.h>
  
  #ifdef FAST_IPSEC
  #include <netproto/ipsec/ipsec.h>
  #endif /*FAST_IPSEC*/
  
  #ifdef IPSEC
  #include <netinet6/ipsec.h>
  #endif /*IPSEC*/
  
  struct	inpcbinfo ripcbinfo;
  
  /* control hooks for ipfw and dummynet */
  ip_fw_ctl_t *ip_fw_ctl_ptr;
  ip_dn_ctl_t *ip_dn_ctl_ptr;
  
  static struct lwkt_token raw_token = LWKT_TOKEN_INITIALIZER(raw_token);
  
  
  /*
   * hooks for multicast routing. They all default to NULL,
   * so leave them not initialized and rely on BSS being set to 0.
   */
  
  /* The socket used to communicate with the multicast routing daemon.  */
  struct socket  *ip_mrouter;
  
  /* The various mrouter and rsvp functions */
  int (*ip_mrouter_set)(struct socket *, struct sockopt *);
  int (*ip_mrouter_get)(struct socket *, struct sockopt *);
  int (*ip_mrouter_done)(void);
  int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
  		struct ip_moptions *);
  int (*mrt_ioctl)(int, caddr_t);
  int (*legal_vif_num)(int);
  u_long (*ip_mcast_src)(int);
  
  int (*rsvp_input_p)(struct mbuf **, int *, int);
  int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
  void (*ip_rsvp_force_done)(struct socket *);
  
  /*
   * Nominal space allocated to a raw ip socket.
   */
  #define	RIPSNDQ		8192
  #define	RIPRCVQ		8192
  
  /*
   * Raw interface to IP protocol.
   */
  
  /*
   * Initialize raw connection block queue.
   */
  void
  rip_init(void)
  {
  	in_pcbinfo_init(&ripcbinfo);
  	/*
  	 * XXX We don't use the hash list for raw IP, but it's easier
  	 * to allocate a one entry hash list than it is to check all
  	 * over the place for hashbase == NULL.
  	 */
  	ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask);
  	ripcbinfo.porthashbase = hashinit(1, M_PCB, &ripcbinfo.porthashmask);
  	ripcbinfo.wildcardhashbase = hashinit(1, M_PCB,
  					      &ripcbinfo.wildcardhashmask);
  	ripcbinfo.ipi_size = sizeof(struct inpcb);
  }
  
  /*
   * Setup generic address and protocol structures
   * for raw_input routine, then pass them along with
   * mbuf chain.
   */
  int
  rip_input(struct mbuf **mp, int *offp, int proto)
  {
  	struct sockaddr_in ripsrc = { sizeof ripsrc, AF_INET };
  	struct mbuf *m = *mp;
  	struct ip *ip = mtod(m, struct ip *);
  	struct inpcb *inp;
  	struct inpcb *last = NULL;
  	struct mbuf *opts = NULL;
  
  	*mp = NULL;
  
  	ripsrc.sin_addr = ip->ip_src;
  	lwkt_gettoken(&raw_token);
  	LIST_FOREACH(inp, &ripcbinfo.pcblisthead, inp_list) {
  		if (inp->inp_flags & INP_PLACEMARKER)
  			continue;
  #ifdef INET6
  		if ((inp->inp_vflag & INP_IPV4) == 0)
  			continue;
  #endif
  		if (inp->inp_ip_p && inp->inp_ip_p != proto)
  			continue;
  		if (inp->inp_laddr.s_addr != INADDR_ANY &&
  		    inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
  			continue;
  		if (inp->inp_faddr.s_addr != INADDR_ANY &&
  		    inp->inp_faddr.s_addr != ip->ip_src.s_addr)
  			continue;
  		if (last) {
  			struct mbuf *n = m_copypacket(m, MB_DONTWAIT);
  
  #ifdef IPSEC
  			/* check AH/ESP integrity. */
  			if (n && ipsec4_in_reject_so(n, last->inp_socket)) {
  				m_freem(n);
  				ipsecstat.in_polvio++;
  				/* do not inject data to pcb */
  			} else
  #endif /*IPSEC*/
  #ifdef FAST_IPSEC
  			/* check AH/ESP integrity. */
  			if (ipsec4_in_reject(n, last)) {
  				m_freem(n);
  				/* do not inject data to pcb */
  			} else
  #endif /*FAST_IPSEC*/
  			if (n) {
  				lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
  				if (last->inp_flags & INP_CONTROLOPTS ||
  				    last->inp_socket->so_options & SO_TIMESTAMP)
  				    ip_savecontrol(last, &opts, ip, n);
  				if (ssb_appendaddr(&last->inp_socket->so_rcv,
  					    (struct sockaddr *)&ripsrc, n,
  					    opts) == 0) {
  					/* should notify about lost packet */
  					m_freem(n);
  					if (opts)
  					    m_freem(opts);
  				} else {
  					sorwakeup(last->inp_socket);
  				}
  				lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
  				opts = NULL;
  			}
  		}
  		last = inp;
  	}
  #ifdef 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*/
  #ifdef FAST_IPSEC
  	/* check AH/ESP integrity. */
  	if (last && ipsec4_in_reject(m, last)) {
  		m_freem(m);
  		ipstat.ips_delivered--;
  		/* do not inject data to pcb */
  	} else
  #endif /*FAST_IPSEC*/
  	/* Check the minimum TTL for socket. */
  	if (last && ip->ip_ttl < last->inp_ip_minttl) {
  		m_freem(opts);
  		ipstat.ips_delivered--;
  	} else if (last) {
  		if (last->inp_flags & INP_CONTROLOPTS ||
  		    last->inp_socket->so_options & SO_TIMESTAMP)
  			ip_savecontrol(last, &opts, ip, m);
  		lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
  		if (ssb_appendaddr(&last->inp_socket->so_rcv,
  		    (struct sockaddr *)&ripsrc, m, opts) == 0) {
  			m_freem(m);
  			if (opts)
  			    m_freem(opts);
  		} else {
  			sorwakeup(last->inp_socket);
  		}
  		lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
  	} else {
  		m_freem(m);
  		ipstat.ips_noproto++;
  		ipstat.ips_delivered--;
  	}
  	lwkt_reltoken(&raw_token);
  	return(IPPROTO_DONE);
  }
  
  /*
   * 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 socket *so, ...)
  {
  	struct ip *ip;
  	struct inpcb *inp = so->so_pcb;
  	__va_list ap;
  	int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
  	u_long dst;
  
  	__va_start(ap, so);
  	dst = __va_arg(ap, u_long);
  	__va_end(ap);
  
  	/*
  	 * 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), MB_WAIT);
  		if (m == NULL)
  			return(ENOBUFS);
  		ip = mtod(m, struct ip *);
  		ip->ip_tos = inp->inp_ip_tos;
  		ip->ip_off = 0;
  		ip->ip_p = inp->inp_ip_p;
  		ip->ip_len = m->m_pkthdr.len;
  		ip->ip_src = inp->inp_laddr;
  		ip->ip_dst.s_addr = dst;
  		ip->ip_ttl = inp->inp_ip_ttl;
  	} else {
  		int hlen;
  
  		if (m->m_pkthdr.len > IP_MAXPACKET) {
  			m_freem(m);
  			return(EMSGSIZE);
  		}
  		if (m->m_len < sizeof(struct ip)) {
  			m = m_pullup(m, sizeof(struct ip));
  			if (m == NULL)
  				return ENOBUFS;
  		}
  		ip = mtod(m, struct ip *);
  		hlen = IP_VHL_HL(ip->ip_vhl) << 2;
  
  		/* Don't allow header length less than the minimum. */
  		if (hlen < sizeof(struct ip)) {
  			m_freem(m);
  			return EINVAL;
  		}
  
  		/*
  		 * Don't allow both user specified and setsockopt options.
  		 * Don't allow packet length sizes that will crash.
  		 */
  		if ((hlen != sizeof(struct ip) && inp->inp_options) ||
  		    ip->ip_len > m->m_pkthdr.len || ip->ip_len < hlen) {
  			m_freem(m);
  			return EINVAL;
  		}
  		if (ip->ip_id == 0)
  			ip->ip_id = ip_newid();
  
  		/* Prevent ip_output from overwriting header fields */
  		flags |= IP_RAWOUTPUT;
  		ipstat.ips_rawout++;
  	}
  
  	return ip_output(m, inp->inp_options, &inp->inp_route, flags,
  			 inp->inp_moptions, inp);
  }
  
  /*
   * Raw IP socket option processing.
   */
  void
  rip_ctloutput(netmsg_t msg)
  {
  	struct socket *so = msg->base.nm_so;
  	struct sockopt *sopt = msg->ctloutput.nm_sopt;
  	struct	inpcb *inp = so->so_pcb;
  	int	error, optval;
  
  	if (sopt->sopt_level != IPPROTO_IP) {
  		error = EINVAL;
  		goto done;
  	}
  
  	error = 0;
  
  	switch (sopt->sopt_dir) {
  	case SOPT_GET:
  		switch (sopt->sopt_name) {
  		case IP_HDRINCL:
  			optval = inp->inp_flags & INP_HDRINCL;
  			soopt_from_kbuf(sopt, &optval, sizeof optval);
  			break;
  
  		case IP_FW_ADD: /* ADD actually returns the body... */
  		case IP_FW_GET:
  			if (IPFW_LOADED)
  				error = ip_fw_sockopt(sopt);
  			else
  				error = ENOPROTOOPT;
  			break;
  
  		case IP_DUMMYNET_GET:
  			error = ip_dn_sockopt(sopt);
  			break ;
  
  		case MRT_INIT:
  		case MRT_DONE:
  		case MRT_ADD_VIF:
  		case MRT_DEL_VIF:
  		case MRT_ADD_MFC:
  		case MRT_DEL_MFC:
  		case MRT_VERSION:
  		case MRT_ASSERT:
  		case MRT_API_SUPPORT:
  		case MRT_API_CONFIG:
  		case MRT_ADD_BW_UPCALL:
  		case MRT_DEL_BW_UPCALL:
  			error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
  				EOPNOTSUPP;
  			break;
  
  		default:
  			ip_ctloutput(msg);
  			/* msg invalid now */
  			return;
  		}
  		break;
  
  	case SOPT_SET:
  		switch (sopt->sopt_name) {
  		case IP_HDRINCL:
  			error = soopt_to_kbuf(sopt, &optval, sizeof optval,
  					      sizeof optval);
  			if (error)
  				break;
  			if (optval)
  				inp->inp_flags |= INP_HDRINCL;
  			else
  				inp->inp_flags &= ~INP_HDRINCL;
  			break;
  
  		case IP_FW_ADD:
  		case IP_FW_DEL:
  		case IP_FW_FLUSH:
  		case IP_FW_ZERO:
  		case IP_FW_RESETLOG:
  			if (IPFW_LOADED)
  				error = ip_fw_ctl_ptr(sopt);
  			else
  				error = ENOPROTOOPT;
  			break;
  
  		case IP_DUMMYNET_CONFIGURE:
  		case IP_DUMMYNET_DEL:
  		case IP_DUMMYNET_FLUSH:
  			error = ip_dn_sockopt(sopt);
  			break ;
  
  		case IP_RSVP_ON:
  			error = ip_rsvp_init(so);
  			break;
  
  		case IP_RSVP_OFF:
  			error = ip_rsvp_done();
  			break;
  
  		case IP_RSVP_VIF_ON:
  		case IP_RSVP_VIF_OFF:
  			error = ip_rsvp_vif ?
  				ip_rsvp_vif(so, sopt) : EINVAL;
  			break;
  
  		case MRT_INIT:
  		case MRT_DONE:
  		case MRT_ADD_VIF:
  		case MRT_DEL_VIF:
  		case MRT_ADD_MFC:
  		case MRT_DEL_MFC:
  		case MRT_VERSION:
  		case MRT_ASSERT:
  		case MRT_API_SUPPORT:
  		case MRT_API_CONFIG:
  		case MRT_ADD_BW_UPCALL:
  		case MRT_DEL_BW_UPCALL:
  			error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
  					EOPNOTSUPP;
  			break;
  
  		default:
  			ip_ctloutput(msg);
  			/* msg invalid now */
  			return;
  		}
  		break;
  	}
  done:
  	lwkt_replymsg(&msg->lmsg, error);
  }
  
  /*
   * This function exists solely to receive the PRC_IFDOWN messages which
   * are sent by if_down().  It looks for an ifaddr whose ifa_addr is sa,
   * and calls in_ifadown() to remove all routes corresponding to that address.
   * It also receives the PRC_IFUP messages from if_up() and reinstalls the
   * interface routes.
   */
  void
  rip_ctlinput(netmsg_t msg)
  {
  	int cmd = msg->ctlinput.nm_cmd;
  	struct sockaddr *sa = msg->ctlinput.nm_arg;
  	struct in_ifaddr *ia;
  	struct in_ifaddr_container *iac;
  	struct ifnet *ifp;
  	int err;
  	int flags;
  
  	switch (cmd) {
  	case PRC_IFDOWN:
  		TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
  			ia = iac->ia;
  
  			if (ia->ia_ifa.ifa_addr == sa &&
  			    (ia->ia_flags & IFA_ROUTE)) {
  				/*
  				 * in_ifscrub kills the interface route.
  				 */
  				in_ifscrub(ia->ia_ifp, ia);
  				/*
  				 * in_ifadown gets rid of all the rest of
  				 * the routes.  This is not quite the right
  				 * thing to do, but at least if we are running
  				 * a routing process they will come back.
  				 */
  				in_ifadown(&ia->ia_ifa, 0);
  				break;
  			}
  		}
  		break;
  
  	case PRC_IFUP:
  		ia = NULL;
  		TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
  			if (iac->ia->ia_ifa.ifa_addr == sa) {
  				ia = iac->ia;
  				break;
  			}
  		}
  		if (ia == NULL || (ia->ia_flags & IFA_ROUTE))
  			goto done;
  		flags = RTF_UP;
  		ifp = ia->ia_ifa.ifa_ifp;
  
  #ifdef CARP
  		/*
  		 * Don't add prefix routes for CARP interfaces.
  		 * Prefix routes creation is handled by CARP
  		 * interfaces themselves.
  		 */
  		if (ifp->if_type == IFT_CARP)
  			goto done;
  #endif
  
  		if ((ifp->if_flags & IFF_LOOPBACK) ||
  		    (ifp->if_flags & IFF_POINTOPOINT))
  			flags |= RTF_HOST;
  
  		err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
  		if (err == 0)
  			ia->ia_flags |= IFA_ROUTE;
  		break;
  	}
  done:
  	lwkt_replymsg(&msg->lmsg, 0);
  }
  
  u_long	rip_sendspace = RIPSNDQ;
  u_long	rip_recvspace = RIPRCVQ;
  
  SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
      &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
  SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
      &rip_recvspace, 0, "Maximum incoming raw IP datagram size");
  
  static void
  rip_attach(netmsg_t msg)
  {
  	struct socket *so = msg->base.nm_so;
  	int proto = msg->attach.nm_proto;
  	struct pru_attach_info *ai = msg->attach.nm_ai;
  	struct inpcb *inp;
  	int error;
  
  	inp = so->so_pcb;
  	if (inp)
  		panic("rip_attach");
  	error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
  	if (error)
  		goto done;
  
  	error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
  	if (error)
  		goto done;
  
  	lwkt_gettoken(&raw_token);
  	error = in_pcballoc(so, &ripcbinfo);
  	if (error == 0) {
  		inp = (struct inpcb *)so->so_pcb;
  		inp->inp_vflag |= INP_IPV4;
  		inp->inp_ip_p = proto;
  		inp->inp_ip_ttl = ip_defttl;
  	}
  	lwkt_reltoken(&raw_token);
  	error = 0;
  done:
  	lwkt_replymsg(&msg->lmsg, error);
  }
  
  static void
  rip_detach(netmsg_t msg)
  {
  	struct socket *so = msg->base.nm_so;
  	struct inpcb *inp;
  
  	inp = so->so_pcb;
  	if (inp == NULL)
  		panic("rip_detach");
  	if (so == ip_mrouter && ip_mrouter_done)
  		ip_mrouter_done();
  	if (ip_rsvp_force_done)
  		ip_rsvp_force_done(so);
  	if (so == ip_rsvpd)
  		ip_rsvp_done();
  	in_pcbdetach(inp);
  	lwkt_replymsg(&msg->lmsg, 0);
  }
  
  /*
   * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
   *	 will sofree() it when we return.
   */
  static void
  rip_abort(netmsg_t msg)
  {
  	struct socket *so = msg->base.nm_so;
  	int error;
  
  	soisdisconnected(so);
  	if (so->so_state & SS_NOFDREF) {    /* XXX not sure why this test */
  		rip_detach(msg);
  		/* msg invalid now */
  		return;
  	}
  	error = 0;
  	lwkt_replymsg(&msg->lmsg, error);
  }
  
  static void
  rip_disconnect(netmsg_t msg)
  {
  	struct socket *so = msg->base.nm_so;
  	int error;
  
  	if (so->so_state & SS_ISCONNECTED) {
  		soreference(so);
  		rip_abort(msg);
  		/* msg invalid now */
  		sofree(so);
  		return;
  	}
  	error = ENOTCONN;
  	lwkt_replymsg(&msg->lmsg, error);
  }
  
  static void
  rip_bind(netmsg_t msg)
  {
  	struct socket *so = msg->base.nm_so;
  	struct sockaddr *nam = msg->bind.nm_nam;
  	struct inpcb *inp = so->so_pcb;
  	struct sockaddr_in *addr = (struct sockaddr_in *)nam;
  	int error;
  
  	if (nam->sa_len == sizeof(*addr)) {
  		if (TAILQ_EMPTY(&ifnet) ||
  		    ((addr->sin_family != AF_INET) &&
  		     (addr->sin_family != AF_IMPLINK)) ||
  		    (addr->sin_addr.s_addr != INADDR_ANY &&
  		     ifa_ifwithaddr((struct sockaddr *)addr) == 0)) {
  			error = EADDRNOTAVAIL;
  		} else {
  			inp->inp_laddr = addr->sin_addr;
  			error = 0;
  		}
  	} else {
  		error = EINVAL;
  	}
  	lwkt_replymsg(&msg->lmsg, error);
  }
  
  static void
  rip_connect(netmsg_t msg)
  {
  	struct socket *so = msg->base.nm_so;
  	struct sockaddr *nam = msg->connect.nm_nam;
  	struct inpcb *inp = so->so_pcb;
  	struct sockaddr_in *addr = (struct sockaddr_in *)nam;
  	int error;
  
  	if (nam->sa_len != sizeof(*addr)) {
  		error = EINVAL;
  	} else if (TAILQ_EMPTY(&ifnet)) {
  		error = EADDRNOTAVAIL;
  	} else {
  		if ((addr->sin_family != AF_INET) &&
  		    (addr->sin_family != AF_IMPLINK)) {
  			error = EAFNOSUPPORT;
  		} else {
  			inp->inp_faddr = addr->sin_addr;
  			soisconnected(so);
  			error = 0;
  		}
  	}
  	lwkt_replymsg(&msg->lmsg, error);
  }
  
  static void
  rip_shutdown(netmsg_t msg)
  {
  	socantsendmore(msg->base.nm_so);
  	lwkt_replymsg(&msg->lmsg, 0);
  }
  
  static void
  rip_send(netmsg_t msg)
  {
  	struct socket *so = msg->base.nm_so;
  	struct mbuf *m = msg->send.nm_m;
  	/*struct mbuf *control = msg->send.nm_control;*/
  	struct sockaddr *nam = msg->send.nm_addr;
  	/*int flags = msg->send.nm_flags;*/
  	struct inpcb *inp = so->so_pcb;
  	u_long dst;
  	int error;
  
  	if (so->so_state & SS_ISCONNECTED) {
  		if (nam) {
  			m_freem(m);
  			error = EISCONN;
  		} else {
  			dst = inp->inp_faddr.s_addr;
  			error = rip_output(m, so, dst);
  		}
  	} else {
  		if (nam == NULL) {
  			m_freem(m);
  			error = ENOTCONN;
  		} else {
  			dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
  			error = rip_output(m, so, dst);
  		}
  	}
  	lwkt_replymsg(&msg->lmsg, error);
  }
  
  SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, &ripcbinfo, 0,
  	    in_pcblist_global, "S,xinpcb", "List of active raw IP sockets");
  
  struct pr_usrreqs rip_usrreqs = {
  	.pru_abort = rip_abort,
  	.pru_accept = pr_generic_notsupp,
  	.pru_attach = rip_attach,
  	.pru_bind = rip_bind,
  	.pru_connect = rip_connect,
  	.pru_connect2 = pr_generic_notsupp,
  	.pru_control = in_control_dispatch,
  	.pru_detach = rip_detach,
  	.pru_disconnect = rip_disconnect,
  	.pru_listen = pr_generic_notsupp,
  	.pru_peeraddr = in_setpeeraddr_dispatch,
  	.pru_rcvd = pr_generic_notsupp,
  	.pru_rcvoob = pr_generic_notsupp,
  	.pru_send = rip_send,
  	.pru_sense = pru_sense_null,
  	.pru_shutdown = rip_shutdown,
  	.pru_sockaddr = in_setsockaddr_dispatch,
  	.pru_sosend = sosend,
  	.pru_soreceive = soreceive
  };
  