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Annotation of 43BSDReno/sys/netrmp/rmp.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 University of Utah.
        !             3:  * Copyright (c) 1990 The Regents of the University of California.
        !             4:  * All rights reserved.
        !             5:  *
        !             6:  * This code is derived from software contributed to Berkeley by
        !             7:  * the Systems Programming Group of the University of Utah Computer
        !             8:  * Science Department.
        !             9:  *
        !            10:  * Redistribution is only permitted until one year after the first shipment
        !            11:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !            12:  * binary forms are permitted provided that: (1) source distributions retain
        !            13:  * this entire copyright notice and comment, and (2) distributions including
        !            14:  * binaries display the following acknowledgement:  This product includes
        !            15:  * software developed by the University of California, Berkeley and its
        !            16:  * contributors'' in the documentation or other materials provided with the
        !            17:  * distribution and in all advertising materials mentioning features or use
        !            18:  * of this software.  Neither the name of the University nor the names of
        !            19:  * its contributors may be used to endorse or promote products derived from
        !            20:  * this software without specific prior written permission.
        !            21:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            22:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            23:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            24:  *
        !            25:  * from: Utah $Hdr: rmp.c 1.3 89/06/07$
        !            26:  *
        !            27:  *     @(#)rmp.c       7.1 (Berkeley) 5/8/90
        !            28:  */
        !            29: 
        !            30: #include "param.h"
        !            31: #include "mbuf.h"
        !            32: #include "socket.h"
        !            33: #include "socketvar.h"
        !            34: 
        !            35: #include "../net/if.h"
        !            36: #include "../net/route.h"
        !            37: #include "../net/raw_cb.h"
        !            38: 
        !            39: #include "../netrmp/rmp.h"
        !            40: #include "../netrmp/rmp_var.h"
        !            41: 
        !            42: /*
        !            43: **  rmp_output: route packet to proper network interface.
        !            44: */
        !            45: 
        !            46: rmp_output(m, so)
        !            47: struct mbuf *m;
        !            48: struct socket *so;
        !            49: {
        !            50:        struct ifnet *ifp;
        !            51:        struct rawcb *rp = sotorawcb(so);
        !            52:        struct rmp_packet *rmp;
        !            53: 
        !            54:        /*
        !            55:         *  Convert the mbuf back to an RMP packet so we can get the
        !            56:         *  address of the "ifnet struct" specifying the interface it
        !            57:         *  should go out on.
        !            58:         */
        !            59:        rmp = mtod(m, struct rmp_packet *);
        !            60:        ifp = rmp->ifp;
        !            61: 
        !            62:        /*
        !            63:         *  Strip off the "ifnet struct ptr" from the packet leaving
        !            64:         *  us with a complete IEEE 802.2 packet.
        !            65:         */
        !            66:        m_adj(m, sizeof(struct ifnet *));
        !            67: 
        !            68:        /*
        !            69:         *  Send the packet.
        !            70:         */
        !            71:        return ((*ifp->if_output) (ifp, m, &rp->rcb_faddr));
        !            72: }

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