131 lines
2.1 KiB
C
131 lines
2.1 KiB
C
/* Copyright (C) Charles Forsyth
|
|
* See /doc/license/NOTICE.Plan9-9k.txt for details about the licensing.
|
|
*/
|
|
/* Portions of this file are Copyright (C) 2015-2018 Giacomo Tesio <giacomo@tesio.it>
|
|
* See /doc/license/gpl-2.0.txt for details about the licensing.
|
|
*/
|
|
/* Portions of this file are Copyright (C) 9front's team.
|
|
* See /doc/license/9front-mit for details about the licensing.
|
|
* See http://code.9front.org/hg/plan9front/ for a list of authors.
|
|
*/
|
|
#include "u.h"
|
|
#include "../port/lib.h"
|
|
#include "mem.h"
|
|
#include "dat.h"
|
|
#include "fns.h"
|
|
#include "../port/error.h"
|
|
|
|
#include "ip.h"
|
|
|
|
enum
|
|
{
|
|
Maxtu= 16*1024,
|
|
};
|
|
|
|
typedef struct LB LB;
|
|
struct LB
|
|
{
|
|
Proc *readp;
|
|
Queue *q;
|
|
Fs *f;
|
|
};
|
|
|
|
static void loopbackread(void *a);
|
|
|
|
static void
|
|
loopbackbind(Ipifc *ifc, int _1, char** _2)
|
|
{
|
|
LB *lb;
|
|
|
|
lb = smalloc(sizeof(*lb));
|
|
lb->f = ifc->conv->p->f;
|
|
lb->q = qopen(1024*1024, Qmsg, nil, nil);
|
|
ifc->arg = lb;
|
|
ifc->mbps = 10000;
|
|
|
|
kproc("loopbackread", loopbackread, ifc);
|
|
|
|
}
|
|
|
|
static void
|
|
loopbackunbind(Ipifc *ifc)
|
|
{
|
|
LB *lb = ifc->arg;
|
|
|
|
if(lb->readp)
|
|
postnote(lb->readp, 1, "unbind", 0);
|
|
|
|
/* wait for reader to die */
|
|
while(lb->readp != 0)
|
|
tsleep(&up->sleep, return0, 0, 300);
|
|
|
|
/* clean up */
|
|
qfree(lb->q);
|
|
jehanne_free(lb);
|
|
}
|
|
|
|
static void
|
|
loopbackbwrite(Ipifc *ifc, Block *bp, int _1, uint8_t* _2)
|
|
{
|
|
LB *lb;
|
|
|
|
lb = ifc->arg;
|
|
if(qpass(lb->q, bp) < 0)
|
|
ifc->outerr++;
|
|
ifc->out++;
|
|
}
|
|
|
|
static void
|
|
loopbackread(void *a)
|
|
{
|
|
Ipifc *ifc;
|
|
Block *bp;
|
|
LB *lb;
|
|
|
|
ifc = a;
|
|
lb = ifc->arg;
|
|
lb->readp = up; /* hide identity under a rock for unbind */
|
|
if(waserror()){
|
|
lb->readp = 0;
|
|
pexit("hangup", 1);
|
|
}
|
|
for(;;){
|
|
bp = qbread(lb->q, Maxtu);
|
|
if(bp == nil)
|
|
continue;
|
|
ifc->in++;
|
|
if(!canrlock(ifc)){
|
|
freeb(bp);
|
|
continue;
|
|
}
|
|
if(waserror()){
|
|
runlock(ifc);
|
|
nexterror();
|
|
}
|
|
if(ifc->lifc == nil)
|
|
freeb(bp);
|
|
else
|
|
ipiput4(lb->f, ifc, bp);
|
|
runlock(ifc);
|
|
poperror();
|
|
}
|
|
}
|
|
|
|
Medium loopbackmedium =
|
|
{
|
|
.hsize= 0,
|
|
.mintu= 0,
|
|
.maxtu= Maxtu,
|
|
.maclen= 0,
|
|
.name= "loopback",
|
|
.bind= loopbackbind,
|
|
.unbind= loopbackunbind,
|
|
.bwrite= loopbackbwrite,
|
|
};
|
|
|
|
void
|
|
loopbackmediumlink(void)
|
|
{
|
|
addipmedium(&loopbackmedium);
|
|
}
|