/*- * 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/malloc.h> #include <sys/systm.h> #include <sys/socket.h> #include <sys/socketvar.h> #include <net/if.h> #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