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Annotation of Net2/arch/vax/if/raw_hy.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Tektronix Inc.
        !             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. All advertising materials mentioning features or use of this software
        !            17:  *    must display the following acknowledgement:
        !            18:  *     This product includes software developed by the University of
        !            19:  *     California, Berkeley and its contributors.
        !            20:  * 4. Neither the name of the University nor the names of its contributors
        !            21:  *    may be used to endorse or promote products derived from this software
        !            22:  *    without specific prior written permission.
        !            23:  *
        !            24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            34:  * SUCH DAMAGE.
        !            35:  *
        !            36:  *     @(#)raw_hy.c    7.4 (Berkeley) 12/16/90
        !            37:  */
        !            38: 
        !            39: /*
        !            40:  * 4.3 BSD Unix kernel - NSC HYPERchannel support
        !            41:  *
        !            42:  * $Header: raw_hy.c,v 3.1 84/02/15 04:27:44 steveg Exp $
        !            43:  * $Locker:  $
        !            44:  *
        !            45:  * Copyright (c) 1984, Tektronix Inc.
        !            46:  * All Rights Reserved
        !            47:  *
        !            48:  */
        !            49: 
        !            50: #include "hy.h"
        !            51: #if NHY > 0
        !            52: 
        !            53: #include "sys/param.h"
        !            54: #include "sys/mbuf.h"
        !            55: #include "sys/socket.h"
        !            56: #include "sys/protosw.h"
        !            57: #include "sys/socketvar.h"
        !            58: #include "sys/errno.h"
        !            59: 
        !            60: #include "net/if.h"
        !            61: #include "net/route.h"
        !            62: #include "net/raw_cb.h"
        !            63: 
        !            64: #include "netinet/in.h"
        !            65: #include "netinet/in_systm.h"
        !            66: #include "netinet/in_var.h"
        !            67: #include "if_hy.h"
        !            68: 
        !            69: /*
        !            70:  * Raw interface to HYPERchannel.
        !            71:  */
        !            72: 
        !            73: /*
        !            74:  * Generate HYPERchannel leader and pass packet to hyoutput.
        !            75:  * The user must create a skeletal leader in order to
        !            76:  * communicate message type, message subtype, etc.
        !            77:  * We don't really check the header supplied by the user.
        !            78:  */
        !            79: rhy_output(m, so)
        !            80:        register struct mbuf *m;
        !            81:        struct socket *so;
        !            82: {
        !            83:        int error = 0;
        !            84:        register struct sockaddr_in *sin;
        !            85:        register struct rawcb *rp = sotorawcb(so);
        !            86:        struct in_ifaddr *ia;
        !            87: 
        !            88:        /*
        !            89:         * Verify user has supplied necessary space
        !            90:         * for the header.
        !            91:         */
        !            92:        if ((m->m_off > MMAXOFF || m->m_len < sizeof(struct hym_hdr)) &&
        !            93:            (m = m_pullup(m, sizeof(struct hym_hdr))) == 0) {
        !            94:                error = EMSGSIZE;       /* XXX */
        !            95:                goto bad;
        !            96:        }
        !            97: 
        !            98:        sin = (struct sockaddr_in *)&rp->rcb_faddr;
        !            99:        /* no routing here */
        !           100:        ia = in_iaonnetof(in_netof(sin->sin_addr));
        !           101:        if (ia)
        !           102:                return (hyoutput(ia->ia_ifp, m, (struct sockaddr *)sin));
        !           103:        error = ENETUNREACH;
        !           104: bad:
        !           105:        m_freem(m);
        !           106:        return (error);
        !           107: }
        !           108: #endif

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