context_p.h

This a good VPN source

/*
 * Copyright (C) 2000, 2001  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
 * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: context_p.h,v 1.2 2003/04/11 17:15:40 mcr Exp $ */

#ifndef LWRES_CONTEXT_P_H
#define LWRES_CONTEXT_P_H 1

/*
 * Helper functions, assuming the context is always called "ctx" in
 * the scope these functions are called from.
 */
#define CTXMALLOC(len)		ctx->malloc(ctx->arg, (len))
#define CTXFREE(addr, len)	ctx->free(ctx->arg, (addr), (len))

#define LWRES_DEFAULT_TIMEOUT	120	/* 120 seconds for a reply */

/*
 * Not all the attributes here are actually settable by the application at
 * this time.
 */
struct lwres_context {
	unsigned int		timeout;	/* time to wait for reply */
	lwres_uint32_t		serial;		/* serial number state */

	/*
	 * For network I/O.
	 */
	int			sock;		/* socket to send on */
	lwres_addr_t		address;	/* address to send to */

	/*
	 * Function pointers for allocating memory.
	 */
	lwres_malloc_t		malloc;
	lwres_free_t		free;
	void		       *arg;

	/*
	 * resolv.conf-like data
	 */
	lwres_conf_t		confdata;

	/* linked list of outstanding DNS requests */
	struct lwres_async_state *pending;
};

#endif /* LWRES_CONTEXT_P_H */

/*
 * Local Variables:
 * c-basic-offset: 8
 * End Variables:
 */