sys/netinet6/ip6_demux.c

   1 /*
   2  * Copyright (c) 2003, 2004 Jeffrey M. Hsu.  All rights reserved.
   3  * Copyright (c) 2003, 2004 The DragonFly Project.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to The DragonFly Project
   6  * by Jeffrey M. Hsu.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of The DragonFly Project nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific, prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  28  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  30  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "opt_inet6.h"
  35
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/kernel.h>
  39 #include <sys/socket.h>
  40 #include <sys/socketvar.h>
  41
  42 #include <netinet/tcp_var.h>
  43 #include <netinet6/tcp6_var.h>
  44
  45 lwkt_port_t
  46 tcp6_soport(struct socket *so, struct sockaddr *nam, struct mbuf **m0)
  47 {
  48         struct inpcb *inp;
  49
  50         /*
  51          * Use IPv6 default tcp soport (tcp protocol thread on cpu 0) if:
  52          * - No socket yet
  53          * - No inp, connection reset by peer
  54          * - IPv6 only
  55          * - Not IPv4 mapped
  56          */
  57         if (so == NULL || (inp = so->so_pcb) == NULL ||
  58             (inp->inp_flags & IN6P_IPV6_V6ONLY) ||
  59             (inp->inp_vflag & INP_IPV4) == 0) {
  60                 return tcp6_addrport();
  61         }
  62
  63         /* IPv4 mapped, fall back to IPv4 tcp_soport */
  64         return tcp_soport(so, nam, m0);
  65 }
  66
  67 /*
  68  * XXX hack
  69  */
  70 lwkt_port_t
  71 tcp6_addrport(void)
  72 {
  73         return(tcp_addrport0());
  74 }