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/* $OpenBSD: natm_pcb.c,v 1.2 1996/07/03 17:24:29 chuck Exp $ */
/*
*
* 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.
*/
/*
* atm_pcb.c: manage atm protocol control blocks and keep IP and NATM
* from trying to use each other's VCs.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <net/if.h>
#include <net/radix.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netnatm/natm.h>
/*
* npcb_alloc: allocate a npcb [in the free state]
*/
struct natmpcb *npcb_alloc(wait)
int wait;
{
struct natmpcb *npcb;
MALLOC(npcb, struct natmpcb *, sizeof(*npcb), M_PCB, wait);
#ifdef DIAGNOSTIC
if (wait == M_WAITOK && npcb == NULL) panic("npcb_alloc: malloc didn't wait");
#endif
if (npcb) {
bzero(npcb, sizeof(*npcb));
npcb->npcb_flags = NPCB_FREE;
}
return(npcb);
}
/*
* npcb_free: free a npcb
*/
void npcb_free(npcb, op)
struct natmpcb *npcb;
int op;
{
int s = splimp();
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 distruction */
} else {
FREE(npcb, M_PCB); /* kill it! */
}
}
splx(s);
}
/*
* npcb_add: add or remove npcb from main list
* returns npcb if ok
*/
struct natmpcb *npcb_add(npcb, ifp, vci, vpi)
struct natmpcb *npcb;
struct ifnet *ifp;
u_int16_t vci;
u_int8_t vpi;
{
struct natmpcb *cpcb = NULL; /* current pcb */
int s = splimp();
/*
* lookup required
*/
for (cpcb = natm_pcbs.lh_first ; cpcb != NULL ;
cpcb = cpcb->pcblist.le_next) {
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) {
cpcb = npcb_alloc(M_NOWAIT); /* could be called from lower half */
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:
splx(s);
return(cpcb);
}
#ifdef DDB
int npcb_dump()
{
struct natmpcb *cpcb;
printf("npcb dump:\n");
for (cpcb = natm_pcbs.lh_first ; cpcb != NULL ;
cpcb = cpcb->pcblist.le_next) {
printf("if=%s, vci=%d, vpi=%d, IP=0x%x, sock=0x%x, 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);
}
printf("done\n");
return(0);
}
#endif
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