projects / apple / mdnsresponder.git / blame
| Commit | Line | Data |
|---|---|---|
| 19fa75a9 A |
1 | /* |
| 2 | * Copyright (c) 2020 Apple Inc. All rights reserved. | |
| 3 | * | |
| 4 | * Redistribution and use in source and binary forms, with or without | |
| 5 | * modification, are permitted provided that the following conditions are met: | |
| 6 | * | |
| 7 | * 1. Redistributions of source code must retain the above copyright notice, | |
| 8 | * this list of conditions and the following disclaimer. | |
| 9 | * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 10 | * this list of conditions and the following disclaimer in the documentation | |
| 11 | * and/or other materials provided with the distribution. | |
| 12 | * 3. Neither the name of Apple Inc. ("Apple") nor the names of its | |
| 13 | * contributors may be used to endorse or promote products derived from this | |
| 14 | * software without specific prior written permission. | |
| 15 | * | |
| 16 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
| 17 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 19 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
| 20 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 22 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 23 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 25 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 | */ | |
| 27 | ||
| 28 | #include "dnssd_clientstub_apple.h" | |
| 29 | #include "dns_sd_private.h" | |
| 30 | ||
| 31 | #include <CoreUtils/CommonServices.h> | |
| 32 | #include <CoreUtils/DebugServices.h> | |
| 33 | #include <os/lock.h> | |
| 34 | ||
| 35 | static xpc_object_t g_defaults_dict = NULL; | |
| 36 | static os_unfair_lock g_defaults_lock = OS_UNFAIR_LOCK_INIT; | |
| 37 | ||
| 38 | DNSServiceErrorType DNSSD_API | |
| 39 | DNSServiceSetResolverDefaults(const void * const plist_data_ptr, const size_t plist_data_len, bool require_privacy) | |
| 40 | { | |
| 41 | DNSServiceErrorType err; | |
| 42 | require_action_quiet(plist_data_len <= (32 * CUBytesPerKibiByte), exit, err = kDNSServiceErr_Invalid); | |
| 43 | ||
| 44 | const xpc_object_t new_dict = xpc_dictionary_create(NULL, NULL, 0); | |
| 45 | require_action_quiet(new_dict, exit, err = kDNSServiceErr_NoMemory); | |
| 46 | ||
| 47 | xpc_dictionary_set_bool(new_dict, kDNSServiceDefaultsKey_RequirePrivacy, require_privacy); | |
| 48 | if (plist_data_ptr && (plist_data_len > 0)) { | |
| 49 | xpc_dictionary_set_data(new_dict, kDNSServiceDefaultsKey_ResolverConfigPListData, plist_data_ptr, | |
| 50 | plist_data_len); | |
| 51 | } | |
| 52 | os_unfair_lock_lock(&g_defaults_lock); | |
| 53 | xpc_object_t old_dict = g_defaults_dict; | |
| 54 | g_defaults_dict = new_dict; | |
| 55 | os_unfair_lock_unlock(&g_defaults_lock); | |
| 56 | ||
| 57 | xpc_forget(&old_dict); | |
| 58 | err = kDNSServiceErr_NoError; | |
| 59 | ||
| 60 | exit: | |
| 61 | return err; | |
| 62 | } | |
| 63 | ||
| 64 | xpc_object_t | |
| 65 | DNSServiceGetRetainedResolverDefaults(void) | |
| 66 | { | |
| 67 | os_unfair_lock_lock(&g_defaults_lock); | |
| 68 | const xpc_object_t dict_copy = g_defaults_dict ? xpc_retain(g_defaults_dict) : NULL; | |
| 69 | os_unfair_lock_unlock(&g_defaults_lock); | |
| 70 | return dict_copy; | |
| 71 | } |