Subversion Repositories planix.SVN

#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"

#include "ip.h"


static void     pktbind(Ipifc*, int, char**);
static void     pktunbind(Ipifc*);
static void     pktbwrite(Ipifc*, Block*, int, uchar*);
static void     pktin(Fs*, Ipifc*, Block*);

Medium pktmedium =
{
.name=          "pkt",
.hsize=         14,
.mintu=         40,
.maxtu=         4*1024,
.maclen=        6,
.bind=          pktbind,
.unbind=        pktunbind,
.bwrite=        pktbwrite,
.pktin=         pktin,
};

/*
 *  called to bind an IP ifc to an ethernet device
 *  called with ifc wlock'd
 */
static void
pktbind(Ipifc*, int argc, char **argv)
{
        USED(argc, argv);
}

/*
 *  called with ifc wlock'd
 */
static void
pktunbind(Ipifc*)
{
}

/*
 *  called by ipoput with a single packet to write
 */
static void
pktbwrite(Ipifc *ifc, Block *bp, int, uchar*)
{
        /* enqueue onto the conversation's rq */
        bp = concatblock(bp);
        if(ifc->conv->snoopers.ref > 0)
                qpass(ifc->conv->sq, copyblock(bp, BLEN(bp)));
        qpass(ifc->conv->rq, bp);
}

/*
 *  called with ifc rlocked when someone write's to 'data'
 */
static void
pktin(Fs *f, Ipifc *ifc, Block *bp)
{
        if(ifc->lifc == nil)
                freeb(bp);
        else {
                if(ifc->conv->snoopers.ref > 0)
                        qpass(ifc->conv->sq, copyblock(bp, BLEN(bp)));
                ipiput4(f, ifc, bp);
        }
}

void
pktmediumlink(void)
{
        addipmedium(&pktmedium);
}