Detect domain-specific resolvers on OS X and disable DnsClient in such cases.

third_party/apple_apsl/dnsinfo.h

+/*
+ * Copyright (c) 2004-2006, 2008, 2009, 2011 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef __DNSINFO_H__
+#define __DNSINFO_H__
+
+/*
+ * These routines provide access to the systems DNS configuration
+ */
+
+#include <sys/cdefs.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+#define DNSINFO_VERSION         20111104
+
+#define DEFAULT_SEARCH_ORDER    200000   /* search order for the "default" resolver domain name */
+
+#define DNS_PTR(type, name)                             \
+        union {                                         \
+                type            name;                   \
+                uint64_t        _ ## name ## _p;        \
+        }
+
+#define DNS_VAR(type, name)                             \
+        type    name
+
+
+#pragma pack(4)
+typedef struct {
+        struct in_addr  address;
+        struct in_addr  mask;
+} dns_sortaddr_t;
+#pragma pack()
+
+
+#pragma pack(4)
+typedef struct {
+        DNS_PTR(char *,                 domain);        /* domain */
+        DNS_VAR(int32_t,                n_nameserver);  /* # nameserver */
+        DNS_PTR(struct sockaddr **,     nameserver);
+        DNS_VAR(uint16_t,               port);          /* port (in host byte order) */
+        DNS_VAR(int32_t,                n_search);      /* # search */
+        DNS_PTR(char **,                search);
+        DNS_VAR(int32_t,                n_sortaddr);    /* # sortaddr */
+        DNS_PTR(dns_sortaddr_t **,      sortaddr);
+        DNS_PTR(char *,                 options);       /* options */
+        DNS_VAR(uint32_t,               timeout);       /* timeout */
+        DNS_VAR(uint32_t,               search_order);  /* search_order */
+        DNS_VAR(uint32_t,               if_index);
+        DNS_VAR(uint32_t,               flags);
+        DNS_VAR(uint32_t,               reach_flags);   /* SCNetworkReachabilityFlags */
+        DNS_VAR(uint32_t,               reserved[5]);
+} dns_resolver_t;
+#pragma pack()
+
+
+#define DNS_RESOLVER_FLAGS_SCOPED       1               /* configuration is for scoped questions */
+
+
+#pragma pack(4)
+typedef struct {
+        DNS_VAR(int32_t,                n_resolver);            /* resolver configurations */
+        DNS_PTR(dns_resolver_t **,      resolver);
+        DNS_VAR(int32_t,                n_scoped_resolver);     /* "scoped" resolver configurations */
+        DNS_PTR(dns_resolver_t **,      scoped_resolver);
+        DNS_VAR(uint32_t,               reserved[5]);
+} dns_config_t;
+#pragma pack()
+
+
+__BEGIN_DECLS
+
+/*
+ * DNS configuration access APIs
+ */
+const char *
+dns_configuration_notify_key    ();
+
+dns_config_t *
+dns_configuration_copy          ();
+
+void
+dns_configuration_free          (dns_config_t   *config);
+
+void
+_dns_configuration_ack          (dns_config_t   *config,
+                                 const char     *bundle_id);
+
+__END_DECLS
+
+#endif  /* __DNSINFO_H__ */