/*-
* Copyright (c) 1996 Charles D. Cranor and Washington University.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles D. Cranor and
* Washington University.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $NetBSD: natm_pcb.c,v 1.4 1996/11/09 03:26:27 chuck Exp $
*/
/*
* atm_pcb.c: manage atm protocol control blocks and keep IP and NATM
* from trying to use each other's VCs.
*/
#include "opt_ddb.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/if.h>
#include <net/if_var.h> /* XXX: db_show_natm() */
#include <netinet/in.h>
#include <netnatm/natm.h>
#include <ddb/ddb.h>
struct npcblist natm_pcbs;
/*
* npcb_alloc: allocate a npcb [in the free state]
*/
struct natmpcb *
npcb_alloc(int wait)
{
struct natmpcb *npcb;
npcb = malloc(sizeof(*npcb), M_PCB, wait | M_ZERO);
if (npcb != NULL)
npcb->npcb_flags = NPCB_FREE;
return (npcb);
}
/*
* npcb_free: free a npcb
*/
void
npcb_free(struct natmpcb *npcb, int op)
{
NATM_LOCK_ASSERT();
if ((npcb->npcb_flags & NPCB_FREE) == 0) {
LIST_REMOVE(npcb, pcblist);
npcb->npcb_flags = NPCB_FREE;
}
if (op == NPCB_DESTROY) {
if (npcb->npcb_inq) {
npcb->npcb_flags = NPCB_DRAIN; /* flag for distruct. */
} else {
free(npcb, M_PCB); /* kill it! */
}
}
}
/*
* npcb_add: add or remove npcb from main list
* returns npcb if ok
*/
struct natmpcb *
npcb_add(struct natmpcb *npcb, struct ifnet *ifp, u_int16_t vci, u_int8_t vpi)
{
struct natmpcb *cpcb = NULL; /* current pcb */
NATM_LOCK_ASSERT();
/*
* lookup required
*/
LIST_FOREACH(cpcb, &natm_pcbs, pcblist)
if (ifp == cpcb->npcb_ifp && vci == cpcb->npcb_vci &&
vpi == cpcb->npcb_vpi)
break;
/*
* add & something already there?
*/
if (cpcb) {
cpcb = NULL;
goto done; /* fail */
}
/*
* need to allocate a pcb?
*/
if (npcb == NULL) {
/* could be called from lower half */
cpcb = npcb_alloc(M_NOWAIT);
if (cpcb == NULL)
goto done; /* fail */
} else {
cpcb = npcb;
}
cpcb->npcb_ifp = ifp;
cpcb->ipaddr.s_addr = 0;
cpcb->npcb_vci = vci;
cpcb->npcb_vpi = vpi;
cpcb->npcb_flags = NPCB_CONNECTED;
LIST_INSERT_HEAD(&natm_pcbs, cpcb, pcblist);
done:
return (cpcb);
}
#ifdef DDB
DB_SHOW_COMMAND(natm, db_show_natm)
{
struct natmpcb *cpcb;
db_printf("npcb dump:\n");
LIST_FOREACH(cpcb, &natm_pcbs, pcblist) {
db_printf("if=%s, vci=%d, vpi=%d, IP=0x%x, sock=%p, "
"flags=0x%x, inq=%d\n", cpcb->npcb_ifp->if_xname,
cpcb->npcb_vci, cpcb->npcb_vpi, cpcb->ipaddr.s_addr,
cpcb->npcb_socket, cpcb->npcb_flags, cpcb->npcb_inq);
}
}
#endif
