mirror of https://github.com/getdnsapi/getdns.git
continuing work on comments and code separation
This commit is contained in:
Glen Wiley
parent
23a8f92d22
commit
267200b294
13
README.md
13
README.md
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@ -4,13 +4,13 @@ getdns API
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* Date: 2013-06-20
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* GitHub: <https://github.com/verisign/getdns>
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getdns is a [modern asynchronous DNS API] intended to make all types of DNS information easily available as described by Paul Hoffman. This implementation is licensed under the [MIT license](http://opensource.org/licenses/MIT).
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getdns is a [modern asynchronous DNS API](http://www.vpnc.org/getdns-api/) intended to make all types of DNS information easily available as described by Paul Hoffman. This implementation is licensed under the [MIT license](http://opensource.org/licenses/MIT).
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This file captures the goals and direcxtion of the project and the current state of the implementation.
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This file captures the goals and direction of the project and the current state of the implementation.
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The goals of this implemtation of the getdns API are:
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The goals of this implementation of the getdns API are:
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* Provide an open source implementation, in C, of the formally described getdns API described by Paul Hoffman at <http://www.vpnc.org/getdns-api/>
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* Provide an open source implementation, in C, of the formally described getdns API by Paul Hoffman at <http://www.vpnc.org/getdns-api/>
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* Initial support for FreeBSD x.y, MS-Windows Ver. X, OSX 10.x, Linux (CentOS/RHEL R6uX, Ubuntu Ver X) via functional "configure" script
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* Initial support to include the Android platform
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* Include examples and tests as part of the build
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@ -22,6 +22,9 @@ The goals of this implemtation of the getdns API are:
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** the develop branch contains the latest development changes which are merged from develop into master once they are considered production ready
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* Both synchronous and asynchronous entry points with an early focus on the asynchronous model
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Non-goals (things we will not be doing) include:
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* implementation of the traditional DNS related routines (gethostbyname, etc.)
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Contributors
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============
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* Neel Goyal, Verisign, Inc.
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@ -37,6 +40,8 @@ The project relies on [libdns from NL](https://www.nlnetlabs.nl/projects/ldns/)
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Although [libevent](http://libevent.org) is used initially to implement the asynchronous model, future work may include a move to other mechanisms (epoll based etc.). Version 2.0.21 stable
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Doxygen is used to generate documentation, while this is not technically necessary for the build it makes things a lot more pleasant.
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Current State of the Implementation
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===================================
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We are currently in the early stages of building the API so the code should be considered incomplete. The current target platforms and the personal primarily responsible for ensuring it builds and runs on that platform include:
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@ -116,57 +116,6 @@ getdns_cancel_callback(
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)
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{ UNUSED_PARAM(context); UNUSED_PARAM(transaction_id); return GETDNS_RETURN_GOOD; }
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getdns_return_t
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getdns_general_sync(
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getdns_context_t context,
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const char *name,
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uint16_t request_type,
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struct getdns_dict *extensions,
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uint32_t *response_length,
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struct getdns_dict *response
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)
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{ UNUSED_PARAM(context); UNUSED_PARAM(name); UNUSED_PARAM(request_type); UNUSED_PARAM(extensions);
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UNUSED_PARAM(response_length); UNUSED_PARAM(response); return GETDNS_RETURN_GOOD; }
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getdns_return_t
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getdns_address_sync(
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getdns_context_t context,
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const char *name,
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struct getdns_dict *extensions,
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uint32_t *response_length,
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struct getdns_dict *response
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)
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{ UNUSED_PARAM(context); UNUSED_PARAM(name); UNUSED_PARAM(extensions);
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UNUSED_PARAM(response_length); UNUSED_PARAM(response); return GETDNS_RETURN_GOOD; }
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getdns_return_t
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getdns_hostname_sync(
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getdns_context_t context,
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struct getdns_dict *address,
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struct getdns_dict *extensions,
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uint32_t *response_length,
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struct getdns_dict *response
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)
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{ UNUSED_PARAM(context); UNUSED_PARAM(address); UNUSED_PARAM(extensions);
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UNUSED_PARAM(response_length); UNUSED_PARAM(response); return GETDNS_RETURN_GOOD; }
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getdns_return_t
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getdns_service_sync(
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getdns_context_t context,
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const char *name,
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struct getdns_dict *extensions,
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uint32_t *response_length,
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struct getdns_dict *response
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)
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{ UNUSED_PARAM(context); UNUSED_PARAM(name); UNUSED_PARAM(extensions);
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UNUSED_PARAM(response_length); UNUSED_PARAM(response); return GETDNS_RETURN_GOOD; }
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void
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getdns_free_sync_request_memory(
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struct getdns_dict *response
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)
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{ UNUSED_PARAM(response); }
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getdns_return_t getdns_list_get_length(struct getdns_list *this_list, size_t *answer)
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{ UNUSED_PARAM(this_list); UNUSED_PARAM(answer); return GETDNS_RETURN_GOOD; }
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@ -1,4 +1,31 @@
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/* Created at 2013-04-02-16-59-04*/
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/**
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* \file
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* \brief include this header in your application to use getdns API
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* This source was taken from the original pseudo-implementation by
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* Paul Hoffman.
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*/
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/* The MIT License (MIT)
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* Copyright (c) 2013 Verisign, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef GETDNS_H
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#define GETDNS_H
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@ -9,7 +36,10 @@
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#define GETDNS_COMPILATION_COMMENT The API implementation should fill in something here, such as a compilation version string and date, and change it each time the API is compiled.
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/* Return values */
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/**
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* \defgroup returnvalues return values
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* @{
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*/
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#define GETDNS_RETURN_GOOD 0
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#define GETDNS_RETURN_GOOD_TEXT Good
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#define GETDNS_RETURN_GENERIC_ERROR 1
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#define GETDNS_RETURN_DNSSEC_WITH_STUB_DISALLOWED 309
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#define GETDNS_RETURN_DNSSEC_WITH_STUB_DISALLOWED_TEXT A query was made with a context that is using stub resolution and a DNSSEC extension specified.
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/* DNSSEC values */
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/** @}
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*/
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/**
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* \defgroup dnssecvalues DNSSEC values
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* @{
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*/
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#define GETDNS_DNSSEC_SECURE 400
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#define GETDNS_DNSSEC_SECURE_TEXT The record was determined to be secure in DNSSEC
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#define GETDNS_DNSSEC_BOGUS 401
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#define GETDNS_DNSSEC_INSECURE_TEXT The record was determined to be insecure in DNSSEC
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#define GETDNS_DNSSEC_NOT_PERFORMED 404
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#define GETDNS_DNSSEC_NOT_PERFORMED_TEXT DNSSEC validation was not performed (only used for debugging)
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/** @}
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*/
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/* Context Variables */
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/**
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* \defgroup contextvars Context variables
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* @{
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*/
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#define GETDNS_CONTEXT_NAMESPACE_DNS 500
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#define GETDNS_CONTEXT_NAMESPACE_DNS_TEXT See getdns_context_set_namespaces()
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#define GETDNS_CONTEXT_NAMESPACE_LOCALNAMES 501
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@ -82,8 +123,13 @@
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#define GETDNS_CONTEXT_GETDNS_CONTEXT_APPEND_NAME_ONLY_TO_MULTIPLE_LABEL_NAME_AFTER_FAILURE_TEXT See getdns_context_set_append_name()
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#define GETDNS_CONTEXT_DO_NOT_APPEND_NAMES 516
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#define GETDNS_CONTEXT_DO_NOT_APPEND_NAMES_TEXT See getdns_context_set_append_name()
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/** @}
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*/
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/* Context codes */
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/**
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* \defgroup contextcodes Context codes for getdns_context_set_context_update_callback()
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* @{
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*/
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#define GETDNS_CONTEXT_CODE_NAMESPACES 600
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#define GETDNS_CONTEXT_CODE_NAMESPACES_TEXT Change related to getdns_context_set_namespaces
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#define GETDNS_CONTEXT_CODE_RESOLUTION_TYPE 601
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@ -120,8 +166,13 @@
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#define GETDNS_CONTEXT_CODE_MEMORY_DEALLOCATOR_TEXT Change related to getdns_context_set_memory_deallocator
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#define GETDNS_CONTEXT_CODE_MEMORY_REALLOCATOR 617
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#define GETDNS_CONTEXT_CODE_MEMORY_REALLOCATOR_TEXT Change related to getdns_context_set_memory_reallocator
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/** @}
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*/
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/* Callback Type Variables */
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/**
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* \defgroup callbacktypes Callback Type Variables
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* @{
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*/
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#define GETDNS_CALLBACK_COMPLETE 700
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#define GETDNS_CALLBACK_COMPLETE_TEXT The response has the requested data in it
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#define GETDNS_CALLBACK_CANCEL 701
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@ -130,14 +181,24 @@
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#define GETDNS_CALLBACK_TIMEOUT_TEXT The requested action timed out; response is NULL
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#define GETDNS_CALLBACK_ERROR 703
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#define GETDNS_CALLBACK_ERROR_TEXT The requested action had an error; response is NULL
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/** @}
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*/
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/* Type Of Name Services */
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/**
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* \defgroup nametype Types of name services
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* @{
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*/
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#define GETDNS_NAMETYPE_DNS 800
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#define GETDNS_NAMETYPE_DNS_TEXT Normal DNS (RFC 1035)
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#define GETDNS_NAMETYPE_WINS 801
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#define GETDNS_NAMETYPE_WINS_TEXT The WINS name service (some reference needed)
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/** @}
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*/
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/* Status Codes for Responses */
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/**
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* \defgroup respstatus Status Codes for Responses
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* @{
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*/
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#define GETDNS_RESPSTATUS_GOOD 900
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#define GETDNS_RESPSTATUS_GOOD_TEXT At least one response was returned
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#define GETDNS_RESPSTATUS_NO_NAME 901
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@ -146,23 +207,37 @@
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#define GETDNS_RESPSTATUS_ALL_TIMEOUT_TEXT All queries for the name timed out
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#define GETDNS_RESPSTATUS_NO_SECURE_ANSWERS 903
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#define GETDNS_RESPSTATUS_NO_SECURE_ANSWERS_TEXT The context setting for getting only secure responses was specified, and at least one DNS response was received, but no DNS response was determined to be secure through DNSSEC.
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/** @}
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*/
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/* Values Associated With Extensions */
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/**
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* \defgroup extvals Values Associated With Extensions
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* @{
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*/
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#define GETDNS_EXTENSION_TRUE 1000
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#define GETDNS_EXTENSION_TRUE_TEXT Turn on the extension
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#define GETDNS_EXTENSION_FALSE 1001
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#define GETDNS_EXTENSION_FALSE_TEXT Do not turn on the extension
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/** @}
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*/
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/* Values Associated With DNS Errors Found By The API */
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/**
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* \defgroup dnserrors Values Associated With DNS Errors Found By The API
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* @{
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*/
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#define GETDNS_BAD_DNS_CNAME_IN_TARGET 1100
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#define GETDNS_BAD_DNS_CNAME_IN_TARGET_TEXT A DNS query type that does not allow a target to be a CNAME pointed to a CNAME
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#define GETDNS_BAD_DNS_ALL_NUMERIC_LABEL 1101
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#define GETDNS_BAD_DNS_ALL_NUMERIC_LABEL_TEXT One or more labels in a returned domain name is all-numeric; this is not legal for a hostname
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#define GETDNS_BAD_DNS_CNAME_RETURNED_FOR_OTHER_TYPE 1102
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#define GETDNS_BAD_DNS_CNAME_RETURNED_FOR_OTHER_TYPE_TEXT A DNS query for a type other than CNAME returned a CNAME response
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/** @}
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*/
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/* Defines for RRtypes (from 2012-12) */
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/**
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* \defgroup rrtypes RR Types
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* @{
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*/
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#define GETDNS_RRTYPE_A 1
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#define GETDNS_RRTYPE_NS 2
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#define GETDNS_RRTYPE_MD 3
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@ -238,6 +313,9 @@
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#define GETDNS_RRTYPE_CAA 257
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#define GETDNS_RRTYPE_TA 32768
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#define GETDNS_RRTYPE_DLV 32769
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/** @}
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*/
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/* Various typedefs */
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typedef struct getdns_context_t *getdns_context_t;
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@ -255,8 +333,13 @@ typedef struct getdns_list some_list;
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/* Helper functions for data structures */
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/* Lists: get the length, get the data_type of the value at a given
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position, and get the data at a given position */
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/**
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* @param this_list list of any of the supported data types
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* @param answer pointer to previsouly allocated storage for size_t
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* @return GETDNS_RETURN_GOOD on success
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* @return GETDNS_RETURN_NO_SUCH_DICT_NAME if name argument doesnt exist in the dictionary
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* @return GETDNS_RETURN_WRONG_TYPE_REQUESTED if the requested data type doesn't match the contents of the indexed argument or name
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*/
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getdns_return_t getdns_list_get_length(struct getdns_list *this_list, size_t *answer);
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getdns_return_t getdns_list_get_data_type(struct getdns_list *this_list, size_t index, getdns_data_type *answer);
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getdns_return_t getdns_list_get_dict(struct getdns_list *this_list, size_t index, struct getdns_dict **answer);
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@ -355,6 +438,25 @@ getdns_cancel_callback(
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getdns_transaction_t transaction_id
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);
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/**
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* \defgroup syncfuns Synchronous API functions that do not use callbacks
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* These functions do not use callbacks, when the application calls one of these
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* functions the library retrieves all of the data before returning. Return
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* values are exactly the same as if you had used a callback with the
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* asynchronous functions.
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* @{
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*/
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/**
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* retrieve general DNS data
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* @param context pointer to a previously created context to be used for this call
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* @param name the ASCII based domain name to lookup
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* @param request_type RR type for the query, e.g. GETDNS_RR_TYPE_NS
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* @param extensions dict data structures, NULL to use no extensions
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* @param response_length response length
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* @param response response
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* @return GETDNS_RETURN_GOOD on success
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*/
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getdns_return_t
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getdns_general_sync(
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getdns_context_t context,
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@ -365,6 +467,15 @@ getdns_general_sync(
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struct getdns_dict *response
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);
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/**
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* retrieve address assigned to a DNS name
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* @param context pointer to a previously created context to be used for this call
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* @param name the ASCII based domain name to lookup
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* @param extensions dict data structures, NULL to use no extensions
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* @param response_length response length
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* @param response response
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* @return GETDNS_RETURN_GOOD on success
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*/
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getdns_return_t
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getdns_address_sync(
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getdns_context_t context,
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@ -374,6 +485,15 @@ getdns_address_sync(
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struct getdns_dict *response
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);
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/**
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* retrieve hostname assigned to an IP address
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* @param context pointer to a previously created context to be used for this call
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* @param name the ASCII based domain name to lookup
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* @param extensions dict data structures, NULL to use no extensions
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* @param response_length response length
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* @param response response
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* @return GETDNS_RETURN_GOOD on success
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*/
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getdns_return_t
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getdns_hostname_sync(
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getdns_context_t context,
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|
|
@ -383,6 +503,15 @@ getdns_hostname_sync(
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struct getdns_dict *response
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);
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/**
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* retrieve a service assigned to a DNS name
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* @param context pointer to a previously created context to be used for this call
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* @param name the ASCII based domain name to lookup
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* @param extensions dict data structures, NULL to use no extensions
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* @param response_length response length
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* @param response response
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* @return GETDNS_RETURN_GOOD on success
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*/
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getdns_return_t
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getdns_service_sync(
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getdns_context_t context,
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|
|
@ -397,6 +526,9 @@ getdns_free_sync_request_memory(
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struct getdns_dict *response
|
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);
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/** @}
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*/
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char *
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getdns_convert_dns_name_to_fqdn(
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char *name_from_dns_response
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|
|
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|
|
@ -0,0 +1,87 @@
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/**
|
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*
|
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* /brief getdns core functions for synchronous use
|
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*
|
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* Originally taken from the getdns API description pseudo implementation.
|
||||
*
|
||||
*/
|
||||
/* The MIT License (MIT)
|
||||
* Copyright (c) 2013 Verisign, Inc.
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#include <getdns_libevent.h>
|
||||
|
||||
/* stuff to make it compile pedantically */
|
||||
#define UNUSED_PARAM(x) ((void)(x))
|
||||
|
||||
|
||||
getdns_return_t
|
||||
getdns_general_sync(
|
||||
getdns_context_t context,
|
||||
const char *name,
|
||||
uint16_t request_type,
|
||||
struct getdns_dict *extensions,
|
||||
uint32_t *response_length,
|
||||
struct getdns_dict *response
|
||||
)
|
||||
{ UNUSED_PARAM(context); UNUSED_PARAM(name); UNUSED_PARAM(request_type); UNUSED_PARAM(extensions);
|
||||
UNUSED_PARAM(response_length); UNUSED_PARAM(response); return GETDNS_RETURN_GOOD; }
|
||||
|
||||
getdns_return_t
|
||||
getdns_address_sync(
|
||||
getdns_context_t context,
|
||||
const char *name,
|
||||
struct getdns_dict *extensions,
|
||||
uint32_t *response_length,
|
||||
struct getdns_dict *response
|
||||
)
|
||||
{ UNUSED_PARAM(context); UNUSED_PARAM(name); UNUSED_PARAM(extensions);
|
||||
UNUSED_PARAM(response_length); UNUSED_PARAM(response); return GETDNS_RETURN_GOOD; }
|
||||
|
||||
getdns_return_t
|
||||
getdns_hostname_sync(
|
||||
getdns_context_t context,
|
||||
struct getdns_dict *address,
|
||||
struct getdns_dict *extensions,
|
||||
uint32_t *response_length,
|
||||
struct getdns_dict *response
|
||||
)
|
||||
{ UNUSED_PARAM(context); UNUSED_PARAM(address); UNUSED_PARAM(extensions);
|
||||
UNUSED_PARAM(response_length); UNUSED_PARAM(response); return GETDNS_RETURN_GOOD; }
|
||||
|
||||
getdns_return_t
|
||||
getdns_service_sync(
|
||||
getdns_context_t context,
|
||||
const char *name,
|
||||
struct getdns_dict *extensions,
|
||||
uint32_t *response_length,
|
||||
struct getdns_dict *response
|
||||
)
|
||||
{ UNUSED_PARAM(context); UNUSED_PARAM(name); UNUSED_PARAM(extensions);
|
||||
UNUSED_PARAM(response_length); UNUSED_PARAM(response); return GETDNS_RETURN_GOOD; }
|
||||
|
||||
void
|
||||
getdns_free_sync_request_memory(
|
||||
struct getdns_dict *response
|
||||
)
|
||||
{ UNUSED_PARAM(response); }
|
||||
|
||||
/* getdns_core_sync.c */
|
||||
Loading…
Reference in New Issue