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Annotation of 43BSDReno/sys/netrmp/rmp.c, revision 1.1.1.1

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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