diff options
Diffstat (limited to 'sys/netnatm/natm_pcb.c')
| -rw-r--r-- | sys/netnatm/natm_pcb.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/sys/netnatm/natm_pcb.c b/sys/netnatm/natm_pcb.c new file mode 100644 index 00000000000..3be08a0c920 --- /dev/null +++ b/sys/netnatm/natm_pcb.c @@ -0,0 +1,190 @@ +/* $OpenBSD: natm_pcb.c,v 1.1 1996/06/30 21:40:13 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/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 |