diff --git a/libc/dns/include/resolv_netid.h b/libc/dns/include/resolv_netid.h
new file mode 100644
index 0000000..991a0bf
--- /dev/null
+++ b/libc/dns/include/resolv_netid.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#ifndef _RESOLV_NETID_H
+#define _RESOLV_NETID_H
+
+/* This header contains declarations related to per-network DNS
+ * server selection. They are used by system/netd/ and should not be
+ * exposed by the C library's public NDK headers.
+ */
+#include <sys/cdefs.h>
+#include <netinet/in.h>
+
+/*
+ * Passing NETID_UNSET as the netId causes system/netd/DnsProxyListener.cpp to
+ * fill in the appropriate default netId for the query.
+ */
+#define NETID_UNSET 0u
+
+/*
+ * MARK_UNSET represents the default (i.e. unset) value for a socket mark.
+ */
+#define MARK_UNSET 0u
+
+__BEGIN_DECLS
+
+struct addrinfo;
+
+struct hostent *android_gethostbyaddrfornet(const void *, socklen_t, int, unsigned, unsigned);
+struct hostent *android_gethostbyaddrfornet_proxy(const void *, socklen_t, int , unsigned);
+struct hostent *android_gethostbynamefornet(const char *, int, unsigned, unsigned);
+int android_getaddrinfofornet(const char *, const char *, const struct addrinfo *, unsigned,
+		unsigned, struct addrinfo **);
+int android_getnameinfofornet(const struct sockaddr *, socklen_t, char *, size_t, char *, size_t,
+		 int, unsigned, unsigned);
+
+/* set name servers for a network */
+extern void _resolv_set_nameservers_for_net(unsigned netid,
+    const char** servers, int numservers, const char *domains);
+
+/* flush the cache associated with a certain network */
+extern void _resolv_flush_cache_for_net(unsigned netid);
+
+__END_DECLS
+
+#endif /* _RESOLV_NETID_H */