1 files changed, 124 insertions, 0 deletions
diff --git a/src/include/gnunet_dnsstub_lib.h b/src/include/gnunet_dnsstub_lib.h
new file mode 100644
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+++ b/src/include/gnunet_dnsstub_lib.h
@@ -0,0 +1,124 @@
+/*
+      This file is part of GNUnet
+      (C) 2012 Christian Grothoff (and other contributing authors)
+
+      GNUnet is free software; you can redistribute it and/or modify
+      it under the terms of the GNU General Public License as published
+      by the Free Software Foundation; either version 3, or (at your
+      option) any later version.
+
+      GNUnet is distributed in the hope that it will be useful, but
+      WITHOUT ANY WARRANTY; without even the implied warranty of
+      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+      General Public License for more details.
+
+      You should have received a copy of the GNU General Public License
+      along with GNUnet; see the file COPYING.  If not, write to the
+      Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+      Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * @file include/gnunet_dnsstub_lib.h
+ * @brief API for helper library to send DNS requests to DNS resolver
+ * @author Christian Grothoff
+ */
+#ifndef GNUNET_DNSSTUB_LIB_H
+#define GNUNET_DNSSTUB_LIB_H
+
+#include "gnunet_common.h"
+#include "gnunet_tun_lib.h"
+
+/**
+ * Opaque handle to the stub resolver.
+ */ 
+struct GNUNET_DNSSTUB_Context;
+
+/**
+ * Opaque handle to a socket doing UDP requests.
+ */ 
+struct GNUNET_DNSSTUB_RequestSocket;
+
+
+/**
+ * Start a DNS stub resolver.
+ *
+ * @param dns_ip target IP address to use
+ * @return NULL on error
+ */
+struct GNUNET_DNSSTUB_Context *
+GNUNET_DNSSTUB_start (const char *dns_ip);
+
+
+/**
+ * Cleanup DNSSTUB resolver.
+ *
+ * @param ctx stub resolver to clean up
+ */
+void
+GNUNET_DNSSTUB_stop (struct GNUNET_DNSSTUB_Context *ctx);
+
+
+/**
+ * Function called with the result of a DNS resolution.
+ *
+ * @param cls closure
+ * @param rs socket that received the response
+ * @param dns dns response, never NULL
+ * @param dns_len number of bytes in 'dns'
+ */
+typedef void (*GNUNET_DNSSTUB_ResultCallback)(void *cls,
+					      struct GNUNET_DNSSTUB_RequestSocket *rs,
+					      const struct GNUNET_TUN_DnsHeader *dns,
+					      size_t dns_len);
+
+
+/**
+ * Perform DNS resolution using given address.
+ *
+ * @param ctx stub resolver to use
+ * @param sa the socket address
+ * @param sa_len the socket length
+ * @param request DNS request to transmit
+ * @param request_len number of bytes in msg
+ * @param rc function to call with result
+ * @param rc_cls closure for 'rc'
+ * @return socket used for the request, NULL on error
+ */
+struct GNUNET_DNSSTUB_RequestSocket *
+GNUNET_DNSSTUB_resolve (struct GNUNET_DNSSTUB_Context *ctx,
+			const struct sockaddr *sa,
+			socklen_t sa_len,
+			const void *request,
+			size_t request_len,
+			GNUNET_DNSSTUB_ResultCallback rc,
+			void *rc_cls);
+
+
+/**
+ * Perform DNS resolution using our default IP from init.
+ *
+ * @param ctx stub resolver to use
+ * @param request DNS request to transmit
+ * @param request_len number of bytes in msg
+ * @param rc function to call with result
+ * @param rc_cls closure for 'rc'
+ * @return socket used for the request, NULL on error
+ */
+struct GNUNET_DNSSTUB_RequestSocket *
+GNUNET_DNSSTUB_resolve2 (struct GNUNET_DNSSTUB_Context *ctx,
+			 const void *request,
+			 size_t request_len,
+			 GNUNET_DNSSTUB_ResultCallback rc,
+			 void *rc_cls);
+
+
+/**
+ * Cancel DNS resolution.
+ *
+ * @param rs resolution to cancel
+ */
+void
+GNUNET_DNSSTUB_resolve_cancel (struct GNUNET_DNSSTUB_RequestSocket *rs);
+
+#endif