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Diffstat (limited to 'keyexchange/isakmpd-20041012/transport.h')
| -rw-r--r-- | keyexchange/isakmpd-20041012/transport.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/keyexchange/isakmpd-20041012/transport.h b/keyexchange/isakmpd-20041012/transport.h new file mode 100644 index 0000000..0a68c73 --- /dev/null +++ b/keyexchange/isakmpd-20041012/transport.h @@ -0,0 +1,159 @@ +/* $OpenBSD: transport.h,v 1.15 2004/06/20 15:24:05 ho Exp $ */ +/* $EOM: transport.h,v 1.16 2000/07/17 18:57:59 provos Exp $ */ + +/* + * Copyright (c) 1998, 1999 Niklas Hallqvist. All rights reserved. + * Copyright (c) 2001, 2004 Håkan Olsson. 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. + * + * 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> + +#include "message.h" + +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 *); + + /* Reinitialize specific transport. */ + void (*reinit) (void); + + /* Remove a transport instance of this method. */ + void (*remove) (struct transport *); + + /* Report status of given transport */ + void (*report) (struct transport *); + + /* Let the given transport set it's bit in the fd_set passed in. */ + int (*fd_set) (struct transport *, fd_set *, int); + + /* 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 *, struct transport *); + + /* + * Fill out a sockaddr structure with the transport's destination end's + * address info. + */ + void (*get_dst) (struct transport *, struct sockaddr **); + + /* + * Fill out a sockaddr structure with the transport's source end's + * address info. + */ + void (*get_src) (struct transport *, struct sockaddr **); + + /* + * Return a string with decoded src and dst information + */ + char *(*decode_ids) (struct transport *); + + /* + * Clone a transport for outbound use. + */ + struct transport *(*clone) (struct transport *, struct sockaddr *); + + /* + * Locate the correct sendq to use for outbound messages. + */ + struct msg_head *(*get_queue) (struct message *); +}; + +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. */ + struct msg_head sendq; + + /* + * Prioritized send queue. Messages in this queue will be transmitted + * before the normal sendq, they will also all be transmitted prior + * to a daemon shutdown. Currently only used for DELETE notifications. + */ + struct msg_head prio_sendq; + + /* Flags describing the transport. */ + int flags; + + /* Reference counter. */ + int refcnt; + + /* Pointer to parent virtual transport, if any. */ + struct transport *virtual; +}; + +/* Set if this is a transport we want to listen on. */ +#define TRANSPORT_LISTEN 1 +/* Used for mark-and-sweep-type garbage collection of transports */ +#define TRANSPORT_MARK 2 + +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 int transport_prio_sendqs_empty(void); +extern void transport_reference(struct transport *); +extern void transport_reinit(void); +extern void transport_release(struct transport *); +extern void transport_report(void); +extern void transport_send_messages(fd_set *); +extern void transport_setup(struct transport *, int); +#endif /* _TRANSPORT_H_ */ |