Initial import of isakmpd, an IKE (ISAKMP/Oakley) implementation for the

OpenBSD IPSEC stack by me, Niklas Hallqvist and Niels Provos, funded by
Ericsson Radio Systems.  It is not yet complete or usable in a real scenario
but the missing pieces will soon be there.  The early commit is for people
who wants early access and who are not afraid of looking at source.
isakmpd interops with Cisco, Timestep, SSH & Pluto (Linux FreeS/WAN) so
far, so it is not that incomplete.  It is really mostly configuration that
is lacking.

1 files changed, 118 insertions, 0 deletions

diff --git a/sbin/isakmpd/transport.h b/sbin/isakmpd/transport.h
new file mode 100644
index 00000000000..8b6ee29fb60
--- /dev/null
+++ b/sbin/isakmpd/transport.h
@@ -0,0 +1,118 @@
+/*	$Id: transport.h,v 1.1 1998/11/15 00:03:49 niklas Exp $	*/
+
+/*
+ * Copyright (c) 1998 Niklas Hallqvist.  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 Ericsson Radio Systems.
+ * 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.
+ */
+
+/*
+ * This code was written under funding by Ericsson Radio Systems.
+ */
+
+/*
+ * The transport module tries to separate out details concerning the
+ * actual transferral of ISAKMP messages to other parties.
+ */
+
+#ifndef _TRANSPORT_H_
+#define _TRANSPORT_H_
+
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+struct message;
+struct transport;
+
+/* This describes a tranport "method" like UDP or similar.  */
+struct transport_vtbl {
+  /* All transport methods are linked together.  */
+  LIST_ENTRY (transport_vtbl) link;
+
+  /* A textual name of the transport method.  */
+  char *name;
+
+  /* Create a transport instance of this method.  */
+  struct transport *(*create) (char *);
+
+  /* Let the given transport set it's bit in the fd_set passed in.  */
+  int (*fd_set) (struct transport *, fd_set *);
+
+  /* Is the given transport ready for I/O?  */
+  int (*fd_isset) (struct transport *, fd_set *);
+
+  /*
+   * Read a message from the transport's incoming pipe and start
+   * handling it.
+   */
+  void (*handle_message) (struct transport *);
+
+  /* Send a message through the outgoing pipe.  */
+  int (*send_message) (struct message *);
+
+  /*
+   * Fill out a sockaddr structure with the transport's destination end's
+   * address info.  XXX Why not size_t * as last arg?
+   */
+  void (*get_dst) (struct transport *, struct sockaddr **, int *);
+
+  /*
+   * Fill out a sockaddr structure with the transport's source end's
+   * address info.  XXX Why not size_t * as last arg?
+   */
+  void (*get_src) (struct transport *, struct sockaddr **, int *);
+};
+
+struct transport {
+  /* All transports used are linked together.  */
+  LIST_ENTRY (transport) link;
+
+  /* What transport method is this an instance of?  */
+  struct transport_vtbl *vtbl;
+
+  /* The queue holding messages to send on this transport.  */
+  TAILQ_HEAD (msg_head, message) sendq;
+
+  /* Flags describing the transport.  */
+  int flags;
+};
+
+/* Set if this is a transport we want to listen on.  */
+#define TRANSPORT_LISTEN	1
+
+extern void transport_add (struct transport *);
+extern struct transport *transport_create (char *, char *);
+extern int transport_fd_set (fd_set *);
+extern void transport_handle_messages (fd_set *);
+extern void transport_init (void);
+extern void transport_map (void (*) (struct transport *));
+extern void transport_method_add (struct transport_vtbl *);
+extern int transport_pending_wfd_set (fd_set *);
+extern void transport_send_messages (fd_set *);
+
+#endif /* _TRANSPORT_H_ */