import Chuck Cranor's ATM driver

1 files changed, 194 insertions, 0 deletions

diff --git a/sys/netnatm/natm_pcb.c b/sys/netnatm/natm_pcb.c
new file mode 100644
index 0000000..198a091
--- /dev/null
+++ b/sys/netnatm/natm_pcb.c
@@ -0,0 +1,194 @@
+/*	$NetBSD: natm_pcb.c,v 1.4 1996/11/09 03:26:27 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 __P((void));
+
+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=%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);
+  }
+  printf("done\n");
+  return(0);
+}
+
+#endif