/contrib/bind9/lib/lwres/context_p.h

 1/*
 2 * Copyright (C) 2004, 2005, 2007, 2008  Internet Systems Consortium, Inc. ("ISC")
 3 * Copyright (C) 2000, 2001  Internet Software Consortium.
 4 *
 5 * Permission to use, copy, modify, and/or distribute this software for any
 6 * purpose with or without fee is hereby granted, provided that the above
 7 * copyright notice and this permission notice appear in all copies.
 8 *
 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* $Id: context_p.h,v 1.19 2008/12/17 23:47:58 tbox Exp $ */
19
20#ifndef LWRES_CONTEXT_P_H
21#define LWRES_CONTEXT_P_H 1
22
23/*! \file */
24
25/*@{*/
26/**
27 * Helper functions, assuming the context is always called "ctx" in
28 * the scope these functions are called from.
29 */
30#define CTXMALLOC(len)		ctx->malloc(ctx->arg, (len))
31#define CTXFREE(addr, len)	ctx->free(ctx->arg, (addr), (len))
32/*@}*/
33
34#define LWRES_DEFAULT_TIMEOUT	120	/* 120 seconds for a reply */
35
36/**
37 * Not all the attributes here are actually settable by the application at
38 * this time.
39 */
40struct lwres_context {
41	unsigned int		timeout;	/*%< time to wait for reply */
42	lwres_uint32_t		serial;		/*%< serial number state */
43
44	/*
45	 * For network I/O.
46	 */
47	int			sock;		/*%< socket to send on */
48	lwres_addr_t		address;	/*%< address to send to */
49	int			use_ipv4;	/*%< use IPv4 transaction */
50	int			use_ipv6;	/*%< use IPv6 transaction */
51
52	/*@{*/
53	/*
54	 * Function pointers for allocating memory.
55	 */
56	lwres_malloc_t		malloc;
57	lwres_free_t		free;
58	void		       *arg;
59	/*@}*/
60
61	/*%
62	 * resolv.conf-like data
63	 */
64	lwres_conf_t		confdata;
65};
66
67#endif /* LWRES_CONTEXT_P_H */