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[unix-history] / usr / src / sys / vax / if / raw_hy.c

/*
*      @(#)raw_hy.c    6.1     %G%
*
* 4.2 BSD Unix kernel - NSC HYPERchannel support
* NEEDS WORK FOR 4.3
*
* $Header: raw_hy.c,v 3.1 84/02/15 04:27:44 steveg Exp $
* $Locker:  $
*
* Copyright (c) 1984, Tektronix Inc.
* All Rights Reserved
*
*/


#include "param.h"
#include "mbuf.h"
#include "socket.h"
#include "protosw.h"
#include "socketvar.h"
#include "errno.h"

#include "../net/if.h"
#include "../net/route.h"
#include "../net/raw_cb.h"

#include "../netinet/in.h"
#include "../netinet/in_systm.h"
#include "if_hy.h"

/*
* Raw interface to HYPERchannel.
*/

/*
* Generate HYPERchannel leader and pass packet to hyoutput.
* The user must create a skeletal leader in order to
* communicate message type, message subtype, etc.
* We don't really check the header supplied by the user.
*/
rhy_output(m, so)
       register struct mbuf *m;
       struct socket *so;
{
       struct mbuf *n;
       int error = 0;
       register struct sockaddr_in *sin;
       register struct rawcb *rp = sotorawcb(so);
       struct ifnet *ifp;

       /*
        * Verify user has supplied necessary space
        * for the header.
        */
       if ((m->m_off > MMAXOFF || m->m_len < sizeof(struct hym_hdr)) &&
           (m = m_pullup(m, sizeof(struct hym_hdr))) == 0) {
               error = EMSGSIZE;       /* XXX */
               goto bad;
       }

       sin = (struct sockaddr_in *)&rp->rcb_faddr;
       /* no routing here */
       ifp = if_ifonnetof((int)sin->sin_addr.s_net);
       if (ifp)
               return (hyoutput(ifp, m, (struct sockaddr *)sin));
       error = ENETUNREACH;
bad:
       m_freem(m);
       return (error);
}