Line data    Source code

       1             : /*      $OpenBSD: ip_gre.c,v 1.71 2018/02/07 22:30:59 dlg Exp $ */
       2             : /*      $NetBSD: ip_gre.c,v 1.9 1999/10/25 19:18:11 drochner Exp $ */
       3             : 
       4             : /*
       5             :  * Copyright (c) 1998 The NetBSD Foundation, Inc.
       6             :  * All rights reserved.
       7             :  *
       8             :  * This code is derived from software contributed to The NetBSD Foundation
       9             :  * by Heiko W.Rupp <hwr@pilhuhn.de>
      10             :  *
      11             :  * Redistribution and use in source and binary forms, with or without
      12             :  * modification, are permitted provided that the following conditions
      13             :  * are met:
      14             :  * 1. Redistributions of source code must retain the above copyright
      15             :  *    notice, this list of conditions and the following disclaimer.
      16             :  * 2. Redistributions in binary form must reproduce the above copyright
      17             :  *    notice, this list of conditions and the following disclaimer in the
      18             :  *    documentation and/or other materials provided with the distribution.
      19             :  *
      20             :  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
      21             :  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
      22             :  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
      23             :  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
      24             :  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
      25             :  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
      26             :  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
      27             :  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
      28             :  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
      29             :  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
      30             :  * POSSIBILITY OF SUCH DAMAGE.
      31             :  */
      32             : 
      33             : /*
      34             :  * decapsulate tunneled packets and send them on
      35             :  * output half is in net/if_gre.[ch]
      36             :  * This currently handles IPPROTO_GRE, IPPROTO_MOBILE
      37             :  */
      38             : 
      39             : 
      40             : #include "gre.h"
      41             : #if NGRE > 0
      42             : 
      43             : #include <sys/param.h>
      44             : #include <sys/systm.h>
      45             : #include <sys/mbuf.h>
      46             : #include <sys/protosw.h>
      47             : #include <sys/socket.h>
      48             : #include <sys/socketvar.h>
      49             : #include <sys/sysctl.h>
      50             : 
      51             : #include <net/if.h>
      52             : #include <net/route.h>
      53             : 
      54             : #include <netinet/in.h>
      55             : #include <netinet/ip.h>
      56             : #include <netinet/ip_var.h>
      57             : #include <netinet/in_pcb.h>
      58             : 
      59             : #ifdef PIPEX
      60             : #include <net/pipex.h>
      61             : #endif
      62             : 
      63             : int
      64           0 : gre_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
      65             :     struct mbuf *control, struct proc *p)
      66             : {
      67             : #ifdef  PIPEX 
      68           0 :         struct inpcb *inp = sotoinpcb(so);
      69             : 
      70           0 :         if (inp != NULL && inp->inp_pipex && req == PRU_SEND) {
      71           0 :                 struct sockaddr_in *sin4;
      72             :                 struct in_addr *ina_dst;
      73             :                 struct pipex_session *session;
      74             : 
      75             :                 ina_dst = NULL;
      76           0 :                 if ((so->so_state & SS_ISCONNECTED) != 0) {
      77           0 :                         inp = sotoinpcb(so);
      78           0 :                         if (inp)
      79           0 :                                 ina_dst = &inp->inp_laddr;
      80           0 :                 } else if (nam) {
      81           0 :                         if (in_nam2sin(nam, &sin4) == 0)
      82           0 :                                 ina_dst = &sin4->sin_addr;
      83             :                 }
      84           0 :                 if (ina_dst != NULL &&
      85           0 :                     (session = pipex_pptp_userland_lookup_session_ipv4(m,
      86             :                             *ina_dst)))
      87           0 :                         m = pipex_pptp_userland_output(m, session);
      88             : 
      89           0 :                 if (m == NULL)
      90           0 :                         return (ENOMEM);
      91           0 :         }
      92             : #endif
      93           0 :         return rip_usrreq(so, req, m, nam, control, p);
      94           0 : }
      95             : #endif /* if NGRE > 0 */