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

third_party/apple_apsl/dnsinfo.h

Index: third_party/apple_apsl/dnsinfo.h
diff --git a/third_party/apple_apsl/dnsinfo.h b/third_party/apple_apsl/dnsinfo.h
new file mode 100644
index 0000000000000000000000000000000000000000..db2ad902727dc19a6a9ed549307a3ef573551c85
--- /dev/null
+++ b/third_party/apple_apsl/dnsinfo.h
@@ -0,0 +1,114 @@
+/*
+ * 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__ */