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/*
* Copyright (C) 2004-2008 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2000, 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC 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.h,v 1.23 2008-12-17 23:47:58 tbox Exp $ */
#ifndef LWRES_CONTEXT_H
#define LWRES_CONTEXT_H 1
/*! \file lwres/context.h */
#include <stddef.h>
#include <lwres/lang.h>
#include <lwres/int.h>
#include <lwres/result.h>
/*!
* Used to set various options such as timeout, authentication, etc
*/
typedef struct lwres_context lwres_context_t;
LWRES_LANG_BEGINDECLS
typedef void *(*lwres_malloc_t)(void *arg, size_t length);
typedef void (*lwres_free_t)(void *arg, void *mem, size_t length);
/*
* XXXMLG
*
* Make the server reload /etc/resolv.conf periodically.
*
* Make the server do sortlist/searchlist.
*
* Client side can disable the search/sortlist processing.
*
* Use an array of addresses/masks and searchlist for client-side, and
* if added to the client disable the processing on the server.
*
* Share /etc/resolv.conf data between contexts.
*/
/*!
* _SERVERMODE
* Don't allocate and connect a socket to the server, since the
* caller _is_ a server.
*
* _USEIPV4, _USEIPV6
* Use IPv4 and IPv6 transactions with remote servers, respectively.
* For backward compatibility, regard both flags as being set when both
* are cleared.
*/
#define LWRES_CONTEXT_SERVERMODE 0x00000001U
#define LWRES_CONTEXT_USEIPV4 0x00000002U
#define LWRES_CONTEXT_USEIPV6 0x00000004U
lwres_result_t
lwres_context_create(lwres_context_t **contextp, void *arg,
lwres_malloc_t malloc_function,
lwres_free_t free_function,
unsigned int flags);
/**<
* Allocate a lwres context. This is used in all lwres calls.
*
* Memory management can be replaced here by passing in two functions.
* If one is non-NULL, they must both be non-NULL. "arg" is passed to
* these functions.
*
* Contexts are not thread safe. Document at the top of the file.
* XXXMLG
*
* If they are NULL, the standard malloc() and free() will be used.
*
*\pre contextp != NULL && contextp == NULL.
*
*\return Returns 0 on success, non-zero on failure.
*/
void
lwres_context_destroy(lwres_context_t **contextp);
/**<
* Frees all memory associated with a lwres context.
*
*\pre contextp != NULL && contextp == NULL.
*/
lwres_uint32_t
lwres_context_nextserial(lwres_context_t *ctx);
/**<
* XXXMLG Document
*/
void
lwres_context_initserial(lwres_context_t *ctx, lwres_uint32_t serial);
void
lwres_context_freemem(lwres_context_t *ctx, void *mem, size_t len);
void *
lwres_context_allocmem(lwres_context_t *ctx, size_t len);
int
lwres_context_getsocket(lwres_context_t *ctx);
lwres_result_t
lwres_context_send(lwres_context_t *ctx,
void *sendbase, int sendlen);
lwres_result_t
lwres_context_recv(lwres_context_t *ctx,
void *recvbase, int recvlen,
int *recvd_len);
lwres_result_t
lwres_context_sendrecv(lwres_context_t *ctx,
void *sendbase, int sendlen,
void *recvbase, int recvlen,
int *recvd_len);
LWRES_LANG_ENDDECLS
#endif /* LWRES_CONTEXT_H */
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