[unix-history] / usr / src / sys / deprecated / netpup / raw_pup.c

/*      raw_pup.c       4.4     82/03/03        */

#include "../h/param.h"
#include "../h/mbuf.h"
#include "../h/socket.h"
#include "../h/protosw.h"
#include "../h/socketvar.h"
#include "../net/in.h"
#include "../net/in_systm.h"
#include "../net/pup.h"
#include "../net/raw_cb.h"
#include "/usr/include/errno.h"

/*
* Raw PUP protocol interface.
*/

/*ARGSUSED*/
rpup_ctlinput(m)
       struct mbuf *m;
{
COUNT(RPUP_CTLINPUT);
}

/*
* Encapsulate packet in PUP header which is supplied by the
* user.  This is done to allow user to specify PUP identifier.
*/
rpup_output(m0, so)
       struct mbuf *m0;
       struct socket *so;
{
       register struct rawcb *rp = sotorawcb(so);
       register struct pup_header *pup;
       int len;
       struct mbuf *n;
       struct sockaddr_pup *spup;
       struct ifnet *ifp;

COUNT(RPUP_OUTPUT);
       /*
        * Verify user has supplied necessary space
        * for the header and check parameters in it.
        */
       if ((m->m_off > MMAXOFF || m->m_len < sizeof(struct pup_header)) &&
           (m = m_pullup(m, sizeof(struct pup_header)) == 0) {
               goto bad;
       pup = mtod(m, struct pup_header *);
       if (pup->pup_type == 0)
               goto bad;
       if (pup->pup_tcontrol && (pup->pup_tcontrol & ~PUP_TRACE))
               goto bad;
       for (len = 0, n = m; n; n = n->m_next)
               len += n->m_len;
       pup->pup_length = len;
       spup = (struct sockaddr_pup *)&rp->rcb_addr;
       pup->pup_dport = spup->spup_addr;

       /*
        * Insure proper source address is included.
        */
       spup = (struct sockadrr_pup *)rp->rcb_socket->so_addr;
       pup->pup_sport = spup->spup_addr;
       /* for now, assume user generates PUP checksum. */

       ifp = if_ifonnetof(&rp->rcb_addr);
       if (ifp == 0) {
               ifp = if_gatewayfor(&rp->rcb_addr);
               if (ifp == 0)
                       goto bad;
       }
       return (enoutput((struct ifnet *)rp->rcb_pcb, m, PF_PUP));

bad:
       m_freem(m);
       return (0);
}