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/* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ #ifndef LWRES_CONTEXT_H #define LWRES_CONTEXT_H 1 /*! \file lwres/context.h */ #include <inttypes.h> #include <stddef.h> #include <lwres/lang.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. */ uint32_t lwres_context_nextserial(lwres_context_t *ctx); /**< * XXXMLG Document */ void lwres_context_initserial(lwres_context_t *ctx, 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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