11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All rights reserved. 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * * Redistributions of source code must retain the above copyright 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * * Redistributions in binary form must reproduce the above copyright 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * the documentation and/or other materials provided with the 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * distribution. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifndef _RESOLV_CACHE_H_ 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define _RESOLV_CACHE_H_ 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 31fbae9f3c30c869ca2fe8609f2d680430f543f0e6Sasha Levitskiy#include <stddef.h> 32c01274c4aa8494ccef355badd02474ca3cfddc59Nick Kralevich#include <sys/cdefs.h> 33fbae9f3c30c869ca2fe8609f2d680430f543f0e6Sasha Levitskiy 34c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falkstruct __res_state; 35c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 36c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk/* sets the name server addresses to the provided res_state structure. The 37c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk * name servers are retrieved from the cache which is associated 38ea9bf6788144b83cc51c454b2bfe6b980d6e947cSzymon Jakubczak * with the network to which the res_state structure is associated */ 39c01274c4aa8494ccef355badd02474ca3cfddc59Nick Kralevich__LIBC_HIDDEN__ 40ea9bf6788144b83cc51c454b2bfe6b980d6e947cSzymon Jakubczakextern void _resolv_populate_res_for_net(struct __res_state* statp); 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projecttypedef enum { 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project RESOLV_CACHE_UNSUPPORTED, /* the cache can't handle that kind of queries */ 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* or the answer buffer is too small */ 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project RESOLV_CACHE_NOTFOUND, /* the cache doesn't know about this query */ 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project RESOLV_CACHE_FOUND /* the cache found the answer */ 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} ResolvCacheStatus; 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 49c01274c4aa8494ccef355badd02474ca3cfddc59Nick Kralevich__LIBC_HIDDEN__ 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectextern ResolvCacheStatus 5141d9a503716ed6f3291f4cae097dca08d459429cPaul Jensen_resolv_cache_lookup( unsigned netid, 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const void* query, 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int querylen, 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project void* answer, 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int answersize, 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int *answerlen ); 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* add a (query,answer) to the cache, only call if _resolv_cache_lookup 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * did return RESOLV_CACHE_NOTFOUND 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 61c01274c4aa8494ccef355badd02474ca3cfddc59Nick Kralevich__LIBC_HIDDEN__ 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectextern void 6341d9a503716ed6f3291f4cae097dca08d459429cPaul Jensen_resolv_cache_add( unsigned netid, 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const void* query, 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int querylen, 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const void* answer, 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int answerlen ); 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 69a59cfcfd0821f51ee77f13105099f700ccbf9252Mattias Falk/* Notify the cache a request failed */ 70c01274c4aa8494ccef355badd02474ca3cfddc59Nick Kralevich__LIBC_HIDDEN__ 71a59cfcfd0821f51ee77f13105099f700ccbf9252Mattias Falkextern void 7241d9a503716ed6f3291f4cae097dca08d459429cPaul Jensen_resolv_cache_query_failed( unsigned netid, 73a59cfcfd0821f51ee77f13105099f700ccbf9252Mattias Falk const void* query, 74a59cfcfd0821f51ee77f13105099f700ccbf9252Mattias Falk int querylen); 75a59cfcfd0821f51ee77f13105099f700ccbf9252Mattias Falk 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif /* _RESOLV_CACHE_H_ */ 77