FreeBSD/Linux Kernel Cross Reference
sys/netinet6/ip6_demux.c

     /*
      * Copyright (c) 2003, 2004 Jeffrey M. Hsu.  All rights reserved.
      * Copyright (c) 2003, 2004 The DragonFly Project.  All rights reserved.
      *
      * This code is derived from software contributed to The DragonFly Project
      * by Jeffrey M. Hsu.
      *
      * 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 DragonFly 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 COPYRIGHT HOLDERS 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
     * COPYRIGHT HOLDERS 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.
     */
    
    #include "opt_inet6.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/socket.h>
    #include <sys/socketvar.h>
    
    #include <netinet/tcp_var.h>
    #include <netinet6/tcp6_var.h>
    
    lwkt_port_t
    tcp6_soport(struct socket *so, struct sockaddr *nam, struct mbuf **m0)
    {
            struct inpcb *inp;
    
            /*
             * Use IPv6 default tcp soport (tcp protocol thread on cpu 0) if:
             * - No socket yet
             * - No inp, connection reset by peer
             * - IPv6 only
             * - Not IPv4 mapped
             */
            if (so == NULL || (inp = so->so_pcb) == NULL ||
                (inp->inp_flags & IN6P_IPV6_V6ONLY) ||
                (inp->inp_vflag & INP_IPV4) == 0) {
                    return tcp6_addrport();
            }
    
            /* IPv4 mapped, fall back to IPv4 tcp_soport */
            return tcp_soport(so, nam, m0);
    }
    
    /*
     * XXX hack
     */
    lwkt_port_t
    tcp6_addrport(void)
    {
            return(tcp_addrport0());
    }

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