BIND 10 trac751, updated. 7e561fe2f8d44b9224cf107287f79df14584512b [trac751] Add asiodns library

BIND 10 source code commits bind10-changes at lists.isc.org
Thu Apr 7 10:02:19 UTC 2011


The branch, trac751 has been updated
       via  7e561fe2f8d44b9224cf107287f79df14584512b (commit)
      from  583d7973d8f49c061dee13a14c89cf0846f84721 (commit)

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- Log -----------------------------------------------------------------
commit 7e561fe2f8d44b9224cf107287f79df14584512b
Author: Ocean Wang <wanghaidong at cnnic.cn>
Date:   Thu Apr 7 17:59:29 2011 +0800

    [trac751] Add asiodns library

-----------------------------------------------------------------------

Summary of changes:
 configure.ac                                       |    1 +
 src/lib/Makefile.am                                |    2 +-
 .../.Makefile.am.swp}                              |  Bin 11264 -> 12288 bytes
 .../asiodns/.deps/libasiodns_la-dns_service.Plo    |    1 +
 .../asiodns/.deps/libasiodns_la-dns_service.Tpo    |    0 
 src/lib/asiodns/Makefile                           |  747 ++++++++++++++++++++
 src/lib/asiodns/Makefile.am                        |   29 +
 src/lib/asiodns/Makefile.in                        |  747 ++++++++++++++++++++
 src/lib/{asiolink => asiodns}/dns_answer.h         |    0 
 src/lib/{asiolink => asiodns}/dns_lookup.h         |    0 
 src/lib/{asiolink => asiodns}/dns_server.h         |    0 
 src/lib/{asiolink => asiodns}/dns_service.cc       |    0 
 src/lib/{asiolink => asiodns}/dns_service.h        |    0 
 src/lib/asiodns/tests/Makefile.am                  |   43 ++
 14 files changed, 1569 insertions(+), 1 deletions(-)
 copy src/lib/{datasrc/tests/testdata/example2.com.sqlite3 => asiodns/.Makefile.am.swp} (61%)
 create mode 100644 src/lib/asiodns/.deps/libasiodns_la-dns_service.Plo
 copy AUTHORS => src/lib/asiodns/.deps/libasiodns_la-dns_service.Tpo (100%)
 create mode 100644 src/lib/asiodns/Makefile
 create mode 100644 src/lib/asiodns/Makefile.am
 create mode 100644 src/lib/asiodns/Makefile.in
 rename src/lib/{asiolink => asiodns}/dns_answer.h (100%)
 rename src/lib/{asiolink => asiodns}/dns_lookup.h (100%)
 rename src/lib/{asiolink => asiodns}/dns_server.h (100%)
 rename src/lib/{asiolink => asiodns}/dns_service.cc (100%)
 rename src/lib/{asiolink => asiodns}/dns_service.h (100%)
 create mode 100644 src/lib/asiodns/tests/Makefile.am

-----------------------------------------------------------------------
diff --git a/configure.ac b/configure.ac
index 1c063c4..ee07903 100644
--- a/configure.ac
+++ b/configure.ac
@@ -642,6 +642,7 @@ AC_CONFIG_FILES([Makefile
                  src/lib/Makefile
                  src/lib/asiolink/Makefile
                  src/lib/asiolink/tests/Makefile
+                 src/lib/asiodns/Makefile
                  src/lib/bench/Makefile
                  src/lib/bench/example/Makefile
                  src/lib/bench/tests/Makefile
diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am
index 8525b8d..6213796 100644
--- a/src/lib/Makefile.am
+++ b/src/lib/Makefile.am
@@ -1,2 +1,2 @@
 SUBDIRS = exceptions dns cc config python xfr bench log asiolink \
-          nsas cache resolve testutils datasrc server_common
+          nsas cache resolve testutils datasrc server_common asiodns
diff --git a/src/lib/asiodns/.Makefile.am.swp b/src/lib/asiodns/.Makefile.am.swp
new file mode 100644
index 0000000..456e9c5
Binary files /dev/null and b/src/lib/asiodns/.Makefile.am.swp differ
diff --git a/src/lib/asiodns/.deps/libasiodns_la-dns_service.Plo b/src/lib/asiodns/.deps/libasiodns_la-dns_service.Plo
new file mode 100644
index 0000000..9ce06a8
--- /dev/null
+++ b/src/lib/asiodns/.deps/libasiodns_la-dns_service.Plo
@@ -0,0 +1 @@
+# dummy
diff --git a/src/lib/asiodns/.deps/libasiodns_la-dns_service.Tpo b/src/lib/asiodns/.deps/libasiodns_la-dns_service.Tpo
new file mode 100644
index 0000000..e69de29
diff --git a/src/lib/asiodns/Makefile b/src/lib/asiodns/Makefile
new file mode 100644
index 0000000..a5e173c
--- /dev/null
+++ b/src/lib/asiodns/Makefile
@@ -0,0 +1,747 @@
+# Makefile.in generated by automake 1.11 from Makefile.am.
+# src/lib/asiodns/Makefile.  Generated from Makefile.in by configure.
+
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+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
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+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
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+	$(libasiodns_la_LINK) -rpath $(libdir) $(libasiodns_la_OBJECTS) $(libasiodns_la_LIBADD) $(LIBS)
+
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+distclean-compile:
+	-rm -f *.tab.c
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+distdir: $(DISTFILES)
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+clean-generic:
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+
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diff --git a/src/lib/asiodns/Makefile.am b/src/lib/asiodns/Makefile.am
new file mode 100644
index 0000000..f725c78
--- /dev/null
+++ b/src/lib/asiodns/Makefile.am
@@ -0,0 +1,29 @@
+SUBDIRS = . tests
+
+AM_CPPFLAGS = -I$(top_srcdir)/src/lib -I$(top_builddir)/src/lib
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+AM_CPPFLAGS += -I$(top_srcdir)/src/lib/dns -I$(top_builddir)/src/lib/dns
+AM_CPPFLAGS += -I$(top_srcdir)/src/lib/asiolink -I$(top_builddir)/src/lib/asiolink
+
+AM_CXXFLAGS = $(B10_CXXFLAGS)
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+# This is a wrapper library solely used for b10-auth.  The ASIO header files
+# have some code fragments that would hit gcc's unused-parameter warning,
+# which would make the build fail with -Werror (our default setting).
+lib_LTLIBRARIES = libasiodns.la
+libasiodns_la_SOURCES = dns_answer.h
+libasiodns_la_SOURCES += dns_lookup.h
+libasiodns_la_SOURCES += dns_server.h
+libasiodns_la_SOURCES += dns_service.cc dns_service.h
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+# Same for clang++, but we need to turn off -Werror completely.
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+endif
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+libasiodns_la_LIBADD = $(top_builddir)/src/lib/log/liblog.la
diff --git a/src/lib/asiodns/Makefile.in b/src/lib/asiodns/Makefile.in
new file mode 100644
index 0000000..5e5cc19
--- /dev/null
+++ b/src/lib/asiodns/Makefile.in
@@ -0,0 +1,747 @@
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+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
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+	$(LIBTOOLFLAGS) --mode=link $(CXXLD) $(libasiodns_la_CXXFLAGS) \
+	$(CXXFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
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+	$(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS)
+CXXLD = $(CXX)
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+	--mode=link $(CXXLD) $(AM_CXXFLAGS) $(CXXFLAGS) $(AM_LDFLAGS) \
+	$(LDFLAGS) -o $@
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
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+	html-recursive info-recursive install-data-recursive \
+	install-dvi-recursive install-exec-recursive \
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+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+	@list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    test -d "$(distdir)/$$subdir" \
+	    || $(MKDIR_P) "$(distdir)/$$subdir" \
+	    || exit 1; \
+	  fi; \
+	done
+	@list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    dir1=$$subdir; dir2="$(distdir)/$$subdir"; \
+	    $(am__relativize); \
+	    new_distdir=$$reldir; \
+	    dir1=$$subdir; dir2="$(top_distdir)"; \
+	    $(am__relativize); \
+	    new_top_distdir=$$reldir; \
+	    echo " (cd $$subdir && $(MAKE) $(AM_MAKEFLAGS) top_distdir="$$new_top_distdir" distdir="$$new_distdir" \\"; \
+	    echo "     am__remove_distdir=: am__skip_length_check=: am__skip_mode_fix=: distdir)"; \
+	    ($(am__cd) $$subdir && \
+	      $(MAKE) $(AM_MAKEFLAGS) \
+	        top_distdir="$$new_top_distdir" \
+	        distdir="$$new_distdir" \
+		am__remove_distdir=: \
+		am__skip_length_check=: \
+		am__skip_mode_fix=: \
+	        distdir) \
+	      || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-recursive
+all-am: Makefile $(LTLIBRARIES)
+installdirs: installdirs-recursive
+installdirs-am:
+	for dir in "$(DESTDIR)$(libdir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-recursive
+install-exec: install-exec-recursive
+install-data: install-data-recursive
+uninstall: uninstall-recursive
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-recursive
+install-strip:
+	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-recursive
+
+clean-am: clean-generic clean-libLTLIBRARIES clean-libtool \
+	mostlyclean-am
+
+distclean: distclean-recursive
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-recursive
+
+dvi-am:
+
+html: html-recursive
+
+html-am:
+
+info: info-recursive
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-recursive
+
+install-dvi-am:
+
+install-exec-am: install-libLTLIBRARIES
+
+install-html: install-html-recursive
+
+install-html-am:
+
+install-info: install-info-recursive
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-recursive
+
+install-pdf-am:
+
+install-ps: install-ps-recursive
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-recursive
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-recursive
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-recursive
+
+pdf-am:
+
+ps: ps-recursive
+
+ps-am:
+
+uninstall-am: uninstall-libLTLIBRARIES
+
+.MAKE: $(RECURSIVE_CLEAN_TARGETS) $(RECURSIVE_TARGETS) ctags-recursive \
+	install-am install-strip tags-recursive
+
+.PHONY: $(RECURSIVE_CLEAN_TARGETS) $(RECURSIVE_TARGETS) CTAGS GTAGS \
+	all all-am check check-am clean clean-generic \
+	clean-libLTLIBRARIES clean-libtool ctags ctags-recursive \
+	distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-libLTLIBRARIES install-man install-pdf \
+	install-pdf-am install-ps install-ps-am install-strip \
+	installcheck installcheck-am installdirs installdirs-am \
+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+	pdf pdf-am ps ps-am tags tags-recursive uninstall uninstall-am \
+	uninstall-libLTLIBRARIES
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/lib/asiodns/dns_answer.h b/src/lib/asiodns/dns_answer.h
new file mode 100644
index 0000000..84e1f6f
--- /dev/null
+++ b/src/lib/asiodns/dns_answer.h
@@ -0,0 +1,73 @@
+// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#ifndef __ASIOLINK_DNS_ANSWER_H
+#define __ASIOLINK_DNS_ANSWER_H 1
+
+#include <asiolink/io_message.h>
+
+namespace asiolink {
+
+/// \brief The \c DNSAnswer class is an abstract base class for a DNS
+/// Answer provider function.
+///
+/// Specific derived class implementations are hidden within the
+/// implementation.  Instances of the derived classes can be called
+/// as functions via the operator() interface.  Pointers to these
+/// instances can then be provided to the \c IOService class
+/// via its constructor.
+///
+/// A DNS Answer provider function takes answer data that has been obtained
+/// from a DNS Lookup provider functon and readies it to be sent to the
+/// client.  After it has run, the OutputBuffer object passed to it should
+/// contain the answer to the query rendered into wire format.
+class DNSAnswer {
+    ///
+    /// \name Constructors and Destructor
+    ///
+    /// Note: The copy constructor and the assignment operator are
+    /// intentionally defined as private, making this class non-copyable.
+    //@{
+private:
+    DNSAnswer(const DNSAnswer& source);
+    DNSAnswer& operator=(const DNSAnswer& source);
+protected:
+    /// \brief The default constructor.
+    ///
+    /// This is intentionally defined as \c protected as this base class
+    /// should never be instantiated (except as part of a derived class).
+    DNSAnswer() {}
+public:
+    /// \brief The destructor
+    virtual ~DNSAnswer() {}
+    //@}
+    /// \brief The function operator
+    ///
+    /// This makes its call indirectly via the "self" pointer, ensuring
+    /// that the function ultimately invoked will be the one in the derived
+    /// class.
+    ///
+    /// \param io_message The event message to handle
+    /// \param query_message The DNS MessagePtr of the original query
+    /// \param answer_message The DNS MessagePtr of the answer we are
+    /// building
+    /// \param buffer Intermediate data results are put here
+    virtual void operator()(const IOMessage& io_message,
+                            isc::dns::MessagePtr query_message,
+                            isc::dns::MessagePtr answer_message,
+                            isc::dns::OutputBufferPtr buffer) const = 0;
+};
+
+}      // namespace asiolink
+#endif // __ASIOLINK_DNS_ANSWER_H
diff --git a/src/lib/asiodns/dns_lookup.h b/src/lib/asiodns/dns_lookup.h
new file mode 100644
index 0000000..a79976f
--- /dev/null
+++ b/src/lib/asiodns/dns_lookup.h
@@ -0,0 +1,83 @@
+// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#ifndef __ASIOLINK_DNS_LOOKUP_H
+#define __ASIOLINK_DNS_LOOKUP_H 1
+
+#include <asiolink/io_message.h>
+#include <asiolink/dns_server.h>
+#include <dns/buffer.h>
+#include <dns/message.h>
+
+namespace asiolink {
+
+/// \brief The \c DNSLookup class is an abstract base class for a DNS
+/// Lookup provider function.
+///
+/// Specific derived class implementations are hidden within the
+/// implementation.  Instances of the derived classes can be called
+/// as functions via the operator() interface.  Pointers to these
+/// instances can then be provided to the \c IOService class
+/// via its constructor.
+///
+/// A DNS Lookup provider function obtains the data needed to answer
+/// a DNS query (e.g., from authoritative data source, cache, or upstream
+/// query).  After it has run, the OutputBuffer object passed to it
+/// should contain the answer to the query, in an internal representation.
+class DNSLookup {
+    ///
+    /// \name Constructors and Destructor
+    ///
+    /// Note: The copy constructor and the assignment operator are
+    /// intentionally defined as private, making this class non-copyable.
+    //@{
+private:
+    DNSLookup(const DNSLookup& source);
+    DNSLookup& operator=(const DNSLookup& source);
+protected:
+    /// \brief The default constructor.
+    ///
+    /// This is intentionally defined as \c protected as this base class
+    /// should never be instantiated (except as part of a derived class).
+    DNSLookup() : self_(this) {}
+public:
+    /// \brief The destructor
+    virtual ~DNSLookup() {}
+    //@}
+    /// \brief The function operator
+    ///
+    /// This makes its call indirectly via the "self" pointer, ensuring
+    /// that the function ultimately invoked will be the one in the derived
+    /// class.
+    ///
+    /// \param io_message The event message to handle
+    /// \param message The DNS MessagePtr that needs handling
+    /// \param answer_message The final answer will be constructed in
+    ///                       this MessagePtr
+    /// \param buffer The final answer is put here
+    /// \param server DNSServer object to use
+    virtual void operator()(const IOMessage& io_message,
+                            isc::dns::MessagePtr message,
+                            isc::dns::MessagePtr answer_message,
+                            isc::dns::OutputBufferPtr buffer,
+                            DNSServer* server) const
+    {
+        (*self_)(io_message, message, answer_message, buffer, server);
+    }
+private:
+    DNSLookup* self_;
+};
+
+}      // namespace asiolink
+#endif // __ASIOLINK_DNS_LOOKUP_H
diff --git a/src/lib/asiodns/dns_server.h b/src/lib/asiodns/dns_server.h
new file mode 100644
index 0000000..f15f808
--- /dev/null
+++ b/src/lib/asiodns/dns_server.h
@@ -0,0 +1,155 @@
+// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#ifndef __ASIOLINK_DNS_SERVER_H
+#define __ASIOLINK_DNS_SERVER_H 1
+
+#include <asiolink/io_message.h>
+
+namespace asiolink {
+
+/// \brief The \c DNSServer class is a wrapper (and base class) for
+/// classes which provide DNS server functionality.
+///
+/// The classes derived from this one, \c TCPServer and \c UDPServer,
+/// act as the interface layer between clients sending queries, and
+/// functions defined elsewhere that provide answers to those queries.
+/// Those functions are described in more detail below under
+/// \c SimpleCallback, \c DNSLookup, and \c DNSAnswer.
+///
+/// Notes to developers:
+/// When constructed, this class (and its derived classes) will have its
+/// "self_" member set to point to "this".  Objects of this class (as
+/// instantiated through a base class) are sometimes passed by
+/// reference (as this superclass); calls to methods in the base
+/// class are then rerouted via this pointer to methods in the derived
+/// class.  This allows code from outside asiolink, with no specific
+/// knowledge of \c TCPServer or \c UDPServer, to access their methods.
+///
+/// This class is both assignable and copy-constructable.  Its subclasses
+/// use the "stackless coroutine" pattern, meaning that it will copy itself
+/// when "forking", and that instances will be posted as ASIO handler
+/// objects, which are always copied.
+///
+/// Because these objects are frequently copied, it is recommended
+/// that derived classes be kept small to reduce copy overhead.
+class DNSServer {
+protected:
+    ///
+    /// \name Constructors and destructors
+    ///
+    /// This is intentionally defined as \c protected, as this base class
+    /// should never be instantiated except as part of a derived class.
+    //@{
+    DNSServer() : self_(this) {}
+public:
+    /// \brief The destructor
+    virtual ~DNSServer() {}
+    //@}
+
+    ///
+    /// \name Class methods
+    ///
+    /// These methods all make their calls indirectly via the "self_"
+    /// pointer, ensuring that the functions ultimately invoked will be
+    /// the ones in the derived class.  This makes it possible to pass
+    /// instances of derived classes as references to this base class
+    /// without losing access to derived class data.
+    ///
+    //@{
+    /// \brief The funtion operator
+    virtual void operator()(asio::error_code ec = asio::error_code(),
+                            size_t length = 0)
+    {
+        (*self_)(ec, length);
+    }
+
+    /// \brief Stop current running server
+    virtual void stop() { self_->stop();}
+
+    /// \brief Resume processing of the server coroutine after an 
+    /// asynchronous call (e.g., to the DNS Lookup provider) has completed.
+    ///
+    /// \param done If true, this signals the system there is an answer
+    ///             to return.
+    virtual void resume(const bool done) { self_->resume(done); }
+
+    /// \brief Indicate whether the server is able to send an answer
+    /// to a query.
+    ///
+    /// This is presently used only for testing purposes.
+    virtual bool hasAnswer() { return (self_->hasAnswer()); }
+
+    /// \brief Returns the current value of the 'coroutine' object
+    ///
+    /// This is a temporary method, intended to be used for debugging
+    /// purposes during development and removed later.  It allows
+    /// callers from outside the coroutine object to retrieve information
+    /// about its current state.
+    ///
+    /// \return The value of the 'coroutine' object
+    virtual int value() { return (self_->value()); }
+
+    /// \brief Returns a pointer to a clone of this DNSServer object.
+    ///
+    /// When a \c DNSServer object is copied or assigned, the result will
+    /// normally be another \c DNSServer object containing a copy
+    /// of the original "self_" pointer.  Calling clone() guarantees
+    /// that the underlying object is also correctly copied.
+    ///
+    /// \return A deep copy of this DNSServer object
+    virtual DNSServer* clone() { return (self_->clone()); }
+    //@}
+
+protected:
+    /// \brief Lookup handler object.
+    ///
+    /// This is a protected class; it can only be instantiated
+    /// from within a derived class of \c DNSServer.
+    ///
+    /// A server object that has received a query creates an instance
+    /// of this class and scheudles it on the ASIO service queue
+    /// using asio::io_service::post().  When the handler executes, it
+    /// calls the asyncLookup() method in the server object to start a
+    /// DNS lookup.  When the lookup is complete, the server object is
+    /// scheduled to resume, again using io_service::post().
+    ///
+    /// Note that the calling object is copied into the handler object,
+    /// not referenced.  This is because, once the calling object yields
+    /// control to the handler, it falls out of scope and may disappear
+    template <typename T>
+    class AsyncLookup {
+    public:
+        AsyncLookup(T& caller) : caller_(caller) {}
+        void operator()() { caller_.asyncLookup(); }
+    private:
+        T caller_;
+    };
+
+    /// \brief Carries out a DNS lookup.
+    ///
+    /// This function calls the \c DNSLookup object specified by the
+    /// DNS server when the \c IOService was created, passing along
+    /// the details of the query and a pointer back to the current
+    /// server object.  It is called asynchronously via the AsyncLookup
+    /// handler class.
+    virtual void asyncLookup() { self_->asyncLookup(); }
+
+private:
+    DNSServer* self_;
+};
+
+
+}      // asiolink
+#endif // __ASIOLINK_DNS_SERVER_H
diff --git a/src/lib/asiodns/dns_service.cc b/src/lib/asiodns/dns_service.cc
new file mode 100644
index 0000000..f17bb44
--- /dev/null
+++ b/src/lib/asiodns/dns_service.cc
@@ -0,0 +1,200 @@
+// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <unistd.h>             // for some IPC/network system calls
+
+#include <boost/lexical_cast.hpp>
+
+#include <config.h>
+
+#include <log/dummylog.h>
+
+#include <asio.hpp>
+#include <asiolink/dns_service.h>
+#include <asiolink/io_service.h>
+#include <asiolink/io_service.h>
+#include <asiolink/tcp_server.h>
+#include <asiolink/udp_server.h>
+
+#include <log/dummylog.h>
+
+#include <boost/lexical_cast.hpp>
+#include <boost/foreach.hpp>
+
+using isc::log::dlog;
+
+namespace asiolink {
+
+class SimpleCallback;
+class DNSLookup;
+class DNSAnswer;
+
+namespace {
+
+asio::ip::address
+convertAddr(const std::string& address) {
+    asio::error_code err;
+    asio::ip::address addr = asio::ip::address::from_string(address, err);
+    if (err) {
+        isc_throw(IOError, "Invalid IP address '" << &address << "': "
+            << err.message());
+    }
+    return (addr);
+}
+
+}
+
+
+class DNSServiceImpl {
+public:
+    DNSServiceImpl(IOService& io_service, const char& port,
+                  const asio::ip::address* v4addr,
+                  const asio::ip::address* v6addr,
+                  SimpleCallback* checkin, DNSLookup* lookup,
+                  DNSAnswer* answer);
+
+    IOService& io_service_;
+
+    typedef boost::shared_ptr<UDPServer> UDPServerPtr;
+    typedef boost::shared_ptr<TCPServer> TCPServerPtr;
+    typedef boost::shared_ptr<DNSServer> DNSServerPtr;
+    std::vector<DNSServerPtr> servers_;
+    SimpleCallback *checkin_;
+    DNSLookup *lookup_;
+    DNSAnswer *answer_;
+
+    void addServer(uint16_t port, const asio::ip::address& address) {
+        try {
+            dlog(std::string("Initialize TCP server at ") + address.to_string() + ":" + boost::lexical_cast<std::string>(port));
+            TCPServerPtr tcpServer(new TCPServer(io_service_.get_io_service(),
+                address, port, checkin_, lookup_, answer_));
+            (*tcpServer)();
+            servers_.push_back(tcpServer);
+            dlog(std::string("Initialize UDP server at ") + address.to_string() + ":" + boost::lexical_cast<std::string>(port));
+            UDPServerPtr udpServer(new UDPServer(io_service_.get_io_service(),
+                address, port, checkin_, lookup_, answer_));
+            (*udpServer)();
+            servers_.push_back(udpServer);
+        }
+        catch (const asio::system_error& err) {
+            // We need to catch and convert any ASIO level exceptions.
+            // This can happen for unavailable address, binding a privilege port
+            // without the privilege, etc.
+            isc_throw(IOError, "Failed to initialize network servers: " <<
+                      err.what());
+        }
+    }
+    void addServer(const char& port, const asio::ip::address& address) {
+        uint16_t portnum;
+        try {
+            // XXX: SunStudio with stlport4 doesn't reject some invalid
+            // representation such as "-1" by lexical_cast<uint16_t>, so
+            // we convert it into a signed integer of a larger size and perform
+            // range check ourselves.
+            const int32_t portnum32 = boost::lexical_cast<int32_t>(&port);
+            if (portnum32 < 0 || portnum32 > 65535) {
+                isc_throw(IOError, "Invalid port number '" << &port);
+            }
+            portnum = portnum32;
+        } catch (const boost::bad_lexical_cast& ex) {
+            isc_throw(IOError, "Invalid port number '" << &port << "': " <<
+                      ex.what());
+        }
+        addServer(portnum, address);
+    }
+};
+
+DNSServiceImpl::DNSServiceImpl(IOService& io_service,
+                               const char& port,
+                               const asio::ip::address* const v4addr,
+                               const asio::ip::address* const v6addr,
+                               SimpleCallback* checkin,
+                               DNSLookup* lookup,
+                               DNSAnswer* answer) :
+    io_service_(io_service),
+    checkin_(checkin),
+    lookup_(lookup),
+    answer_(answer)
+{
+
+    if (v4addr) {
+        addServer(port, *v4addr);
+    }
+    if (v6addr) {
+        addServer(port, *v6addr);
+    }
+}
+
+DNSService::DNSService(IOService& io_service,
+                       const char& port, const char& address,
+                       SimpleCallback* checkin,
+                       DNSLookup* lookup,
+                       DNSAnswer* answer) :
+    impl_(new DNSServiceImpl(io_service, port, NULL, NULL, checkin, lookup,
+        answer)), io_service_(io_service)
+{
+    addServer(port, &address);
+}
+
+DNSService::DNSService(IOService& io_service,
+                       const char& port,
+                       const bool use_ipv4, const bool use_ipv6,
+                       SimpleCallback* checkin,
+                       DNSLookup* lookup,
+                       DNSAnswer* answer) :
+    impl_(NULL), io_service_(io_service)
+{
+    const asio::ip::address v4addr_any =
+        asio::ip::address(asio::ip::address_v4::any());
+    const asio::ip::address* const v4addrp = use_ipv4 ? &v4addr_any : NULL; 
+    const asio::ip::address v6addr_any =
+        asio::ip::address(asio::ip::address_v6::any());
+    const asio::ip::address* const v6addrp = use_ipv6 ? &v6addr_any : NULL;
+    impl_ = new DNSServiceImpl(io_service, port, v4addrp, v6addrp, checkin, lookup, answer);
+}
+
+DNSService::DNSService(IOService& io_service, SimpleCallback* checkin,
+    DNSLookup* lookup, DNSAnswer *answer) :
+    impl_(new DNSServiceImpl(io_service, *"0", NULL, NULL, checkin, lookup,
+        answer)), io_service_(io_service)
+{
+}
+
+DNSService::~DNSService() {
+    delete impl_;
+}
+
+void
+DNSService::addServer(const char& port, const std::string& address) {
+    impl_->addServer(port, convertAddr(address));
+}
+
+void
+DNSService::addServer(uint16_t port, const std::string& address) {
+    impl_->addServer(port, convertAddr(address));
+}
+
+void
+DNSService::clearServers() {
+    BOOST_FOREACH(const DNSServiceImpl::DNSServerPtr& s, impl_->servers_) {
+        s->stop();
+    }
+    impl_->servers_.clear();
+}
+
+
+
+} // namespace asiolink
diff --git a/src/lib/asiodns/dns_service.h b/src/lib/asiodns/dns_service.h
new file mode 100644
index 0000000..9a3fb4c
--- /dev/null
+++ b/src/lib/asiodns/dns_service.h
@@ -0,0 +1,112 @@
+// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#ifndef __ASIOLINK_DNS_SERVICE_H
+#define __ASIOLINK_DNS_SERVICE_H 1
+
+#include <resolve/resolver_interface.h>
+
+#include <asiolink/io_service.h>
+
+namespace asiolink {
+
+class SimpleCallback;
+class DNSLookup;
+class DNSAnswer;
+class DNSServiceImpl;
+
+/// \brief Handle DNS Queries
+///
+/// DNSService is the service that handles DNS queries and answers with
+/// a given IOService. This class is mainly intended to hold all the
+/// logic that is shared between the authoritative and the recursive
+/// server implementations. As such, it handles asio, including config
+/// updates (through the 'Checkinprovider'), and listening sockets.
+class DNSService {
+    ///
+    /// \name Constructors and Destructor
+    ///
+    /// Note: The copy constructor and the assignment operator are
+    /// intentionally defined as private, making this class non-copyable.
+    //@{
+private:
+    DNSService(const DNSService& source);
+    DNSService& operator=(const DNSService& source);
+
+public:
+    /// \brief The constructor with a specific IP address and port on which
+    /// the services listen on.
+    ///
+    /// \param io_service The IOService to work with
+    /// \param port the port to listen on
+    /// \param address the IP address to listen on
+    /// \param checkin Provider for cc-channel events (see \c SimpleCallback)
+    /// \param lookup The lookup provider (see \c DNSLookup)
+    /// \param answer The answer provider (see \c DNSAnswer)
+    DNSService(IOService& io_service, const char& port,
+               const char& address, SimpleCallback* checkin,
+               DNSLookup* lookup, DNSAnswer* answer);
+    /// \brief The constructor with a specific port on which the services
+    /// listen on.
+    ///
+    /// It effectively listens on "any" IPv4 and/or IPv6 addresses.
+    /// IPv4/IPv6 services will be available if and only if \c use_ipv4
+    /// or \c use_ipv6 is \c true, respectively.
+    ///
+    /// \param io_service The IOService to work with
+    /// \param port the port to listen on
+    /// \param use_ipv4 If true, listen on ipv4 'any'
+    /// \param use_ipv6 If true, listen on ipv6 'any'
+    /// \param checkin Provider for cc-channel events (see \c SimpleCallback)
+    /// \param lookup The lookup provider (see \c DNSLookup)
+    /// \param answer The answer provider (see \c DNSAnswer)
+    DNSService(IOService& io_service, const char& port,
+               const bool use_ipv4, const bool use_ipv6,
+               SimpleCallback* checkin, DNSLookup* lookup,
+               DNSAnswer* answer);
+    /// \brief The constructor without any servers.
+    ///
+    /// Use addServer() to add some servers.
+    DNSService(IOService& io_service, SimpleCallback* checkin,
+               DNSLookup* lookup, DNSAnswer* answer);
+    /// \brief The destructor.
+    ~DNSService();
+    //@}
+
+    /// \brief Add another server to the service
+    void addServer(uint16_t port, const std::string &address);
+    void addServer(const char &port, const std::string &address);
+    /// \brief Remove all servers from the service
+    void clearServers();
+
+    /// \brief Return the native \c io_service object used in this wrapper.
+    ///
+    /// This is a short term work around to support other BIND 10 modules
+    /// that share the same \c io_service with the authoritative server.
+    /// It will eventually be removed once the wrapper interface is
+    /// generalized.
+    asio::io_service& get_io_service() { return io_service_.get_io_service(); }
+
+    /// \brief Return the IO Service Object
+    ///
+    /// \return IOService object for this DNS service.
+    asiolink::IOService& getIOService() { return (io_service_);}
+
+private:
+    DNSServiceImpl* impl_;
+    IOService& io_service_;
+};
+
+}      // namespace asiolink
+#endif // __ASIOLINK_DNS_SERVICE_H
diff --git a/src/lib/asiodns/tests/Makefile.am b/src/lib/asiodns/tests/Makefile.am
new file mode 100644
index 0000000..405d28e
--- /dev/null
+++ b/src/lib/asiodns/tests/Makefile.am
@@ -0,0 +1,43 @@
+AM_CPPFLAGS = -I$(top_srcdir)/src/lib -I$(top_builddir)/src/lib
+AM_CPPFLAGS += $(BOOST_INCLUDES)
+AM_CPPFLAGS += -I$(top_builddir)/src/lib/dns -I$(top_srcdir)/src/bin
+AM_CPPFLAGS += -I$(top_builddir)/src/lib/cc
+AM_CPPFLAGS += -DTEST_DATA_DIR=\"$(srcdir)/testdata\"
+
+AM_CXXFLAGS = $(B10_CXXFLAGS)
+
+if USE_STATIC_LINK
+AM_LDFLAGS = -static
+endif
+
+CLEANFILES = *.gcno *.gcda
+
+TESTS =
+if HAVE_GTEST
+TESTS += run_unittests
+run_unittests_SOURCES  = 
+
+run_unittests_CPPFLAGS = $(AM_CPPFLAGS) $(GTEST_INCLUDES)
+
+run_unittests_LDADD  = $(GTEST_LDADD)
+run_unittests_LDADD += $(SQLITE_LIBS)
+run_unittests_LDADD += $(top_builddir)/src/lib/dns/libdns++.la
+run_unittests_LDADD += $(top_builddir)/src/lib/asiolink/libasiolink.la
+run_unittests_LDADD += $(top_builddir)/src/lib/log/liblog.la
+run_unittests_LDADD += $(top_builddir)/src/lib/exceptions/libexceptions.la
+
+run_unittests_LDFLAGS = $(AM_LDFLAGS) $(GTEST_LDFLAGS) 
+
+# Note: the ordering matters: -Wno-... must follow -Wextra (defined in
+# B10_CXXFLAGS)
+run_unittests_CXXFLAGS = $(AM_CXXFLAGS)
+if USE_GXX
+run_unittests_CXXFLAGS += -Wno-unused-parameter
+endif
+if USE_CLANGPP
+# Same for clang++, but we need to turn off -Werror completely.
+run_unittests_CXXFLAGS += -Wno-error
+endif
+endif
+
+noinst_PROGRAMS = $(TESTS)
diff --git a/src/lib/asiolink/dns_answer.h b/src/lib/asiolink/dns_answer.h
deleted file mode 100644
index 84e1f6f..0000000
--- a/src/lib/asiolink/dns_answer.h
+++ /dev/null
@@ -1,73 +0,0 @@
-// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
-//
-// Permission to use, copy, modify, and/or distribute this software for any
-// purpose with or without fee is hereby granted, provided that the above
-// copyright notice and this permission notice appear in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
-// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
-// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
-// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
-// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
-// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
-// PERFORMANCE OF THIS SOFTWARE.
-
-#ifndef __ASIOLINK_DNS_ANSWER_H
-#define __ASIOLINK_DNS_ANSWER_H 1
-
-#include <asiolink/io_message.h>
-
-namespace asiolink {
-
-/// \brief The \c DNSAnswer class is an abstract base class for a DNS
-/// Answer provider function.
-///
-/// Specific derived class implementations are hidden within the
-/// implementation.  Instances of the derived classes can be called
-/// as functions via the operator() interface.  Pointers to these
-/// instances can then be provided to the \c IOService class
-/// via its constructor.
-///
-/// A DNS Answer provider function takes answer data that has been obtained
-/// from a DNS Lookup provider functon and readies it to be sent to the
-/// client.  After it has run, the OutputBuffer object passed to it should
-/// contain the answer to the query rendered into wire format.
-class DNSAnswer {
-    ///
-    /// \name Constructors and Destructor
-    ///
-    /// Note: The copy constructor and the assignment operator are
-    /// intentionally defined as private, making this class non-copyable.
-    //@{
-private:
-    DNSAnswer(const DNSAnswer& source);
-    DNSAnswer& operator=(const DNSAnswer& source);
-protected:
-    /// \brief The default constructor.
-    ///
-    /// This is intentionally defined as \c protected as this base class
-    /// should never be instantiated (except as part of a derived class).
-    DNSAnswer() {}
-public:
-    /// \brief The destructor
-    virtual ~DNSAnswer() {}
-    //@}
-    /// \brief The function operator
-    ///
-    /// This makes its call indirectly via the "self" pointer, ensuring
-    /// that the function ultimately invoked will be the one in the derived
-    /// class.
-    ///
-    /// \param io_message The event message to handle
-    /// \param query_message The DNS MessagePtr of the original query
-    /// \param answer_message The DNS MessagePtr of the answer we are
-    /// building
-    /// \param buffer Intermediate data results are put here
-    virtual void operator()(const IOMessage& io_message,
-                            isc::dns::MessagePtr query_message,
-                            isc::dns::MessagePtr answer_message,
-                            isc::dns::OutputBufferPtr buffer) const = 0;
-};
-
-}      // namespace asiolink
-#endif // __ASIOLINK_DNS_ANSWER_H
diff --git a/src/lib/asiolink/dns_lookup.h b/src/lib/asiolink/dns_lookup.h
deleted file mode 100644
index a79976f..0000000
--- a/src/lib/asiolink/dns_lookup.h
+++ /dev/null
@@ -1,83 +0,0 @@
-// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
-//
-// Permission to use, copy, modify, and/or distribute this software for any
-// purpose with or without fee is hereby granted, provided that the above
-// copyright notice and this permission notice appear in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
-// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
-// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
-// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
-// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
-// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
-// PERFORMANCE OF THIS SOFTWARE.
-
-#ifndef __ASIOLINK_DNS_LOOKUP_H
-#define __ASIOLINK_DNS_LOOKUP_H 1
-
-#include <asiolink/io_message.h>
-#include <asiolink/dns_server.h>
-#include <dns/buffer.h>
-#include <dns/message.h>
-
-namespace asiolink {
-
-/// \brief The \c DNSLookup class is an abstract base class for a DNS
-/// Lookup provider function.
-///
-/// Specific derived class implementations are hidden within the
-/// implementation.  Instances of the derived classes can be called
-/// as functions via the operator() interface.  Pointers to these
-/// instances can then be provided to the \c IOService class
-/// via its constructor.
-///
-/// A DNS Lookup provider function obtains the data needed to answer
-/// a DNS query (e.g., from authoritative data source, cache, or upstream
-/// query).  After it has run, the OutputBuffer object passed to it
-/// should contain the answer to the query, in an internal representation.
-class DNSLookup {
-    ///
-    /// \name Constructors and Destructor
-    ///
-    /// Note: The copy constructor and the assignment operator are
-    /// intentionally defined as private, making this class non-copyable.
-    //@{
-private:
-    DNSLookup(const DNSLookup& source);
-    DNSLookup& operator=(const DNSLookup& source);
-protected:
-    /// \brief The default constructor.
-    ///
-    /// This is intentionally defined as \c protected as this base class
-    /// should never be instantiated (except as part of a derived class).
-    DNSLookup() : self_(this) {}
-public:
-    /// \brief The destructor
-    virtual ~DNSLookup() {}
-    //@}
-    /// \brief The function operator
-    ///
-    /// This makes its call indirectly via the "self" pointer, ensuring
-    /// that the function ultimately invoked will be the one in the derived
-    /// class.
-    ///
-    /// \param io_message The event message to handle
-    /// \param message The DNS MessagePtr that needs handling
-    /// \param answer_message The final answer will be constructed in
-    ///                       this MessagePtr
-    /// \param buffer The final answer is put here
-    /// \param server DNSServer object to use
-    virtual void operator()(const IOMessage& io_message,
-                            isc::dns::MessagePtr message,
-                            isc::dns::MessagePtr answer_message,
-                            isc::dns::OutputBufferPtr buffer,
-                            DNSServer* server) const
-    {
-        (*self_)(io_message, message, answer_message, buffer, server);
-    }
-private:
-    DNSLookup* self_;
-};
-
-}      // namespace asiolink
-#endif // __ASIOLINK_DNS_LOOKUP_H
diff --git a/src/lib/asiolink/dns_server.h b/src/lib/asiolink/dns_server.h
deleted file mode 100644
index f15f808..0000000
--- a/src/lib/asiolink/dns_server.h
+++ /dev/null
@@ -1,155 +0,0 @@
-// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
-//
-// Permission to use, copy, modify, and/or distribute this software for any
-// purpose with or without fee is hereby granted, provided that the above
-// copyright notice and this permission notice appear in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
-// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
-// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
-// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
-// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
-// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
-// PERFORMANCE OF THIS SOFTWARE.
-
-#ifndef __ASIOLINK_DNS_SERVER_H
-#define __ASIOLINK_DNS_SERVER_H 1
-
-#include <asiolink/io_message.h>
-
-namespace asiolink {
-
-/// \brief The \c DNSServer class is a wrapper (and base class) for
-/// classes which provide DNS server functionality.
-///
-/// The classes derived from this one, \c TCPServer and \c UDPServer,
-/// act as the interface layer between clients sending queries, and
-/// functions defined elsewhere that provide answers to those queries.
-/// Those functions are described in more detail below under
-/// \c SimpleCallback, \c DNSLookup, and \c DNSAnswer.
-///
-/// Notes to developers:
-/// When constructed, this class (and its derived classes) will have its
-/// "self_" member set to point to "this".  Objects of this class (as
-/// instantiated through a base class) are sometimes passed by
-/// reference (as this superclass); calls to methods in the base
-/// class are then rerouted via this pointer to methods in the derived
-/// class.  This allows code from outside asiolink, with no specific
-/// knowledge of \c TCPServer or \c UDPServer, to access their methods.
-///
-/// This class is both assignable and copy-constructable.  Its subclasses
-/// use the "stackless coroutine" pattern, meaning that it will copy itself
-/// when "forking", and that instances will be posted as ASIO handler
-/// objects, which are always copied.
-///
-/// Because these objects are frequently copied, it is recommended
-/// that derived classes be kept small to reduce copy overhead.
-class DNSServer {
-protected:
-    ///
-    /// \name Constructors and destructors
-    ///
-    /// This is intentionally defined as \c protected, as this base class
-    /// should never be instantiated except as part of a derived class.
-    //@{
-    DNSServer() : self_(this) {}
-public:
-    /// \brief The destructor
-    virtual ~DNSServer() {}
-    //@}
-
-    ///
-    /// \name Class methods
-    ///
-    /// These methods all make their calls indirectly via the "self_"
-    /// pointer, ensuring that the functions ultimately invoked will be
-    /// the ones in the derived class.  This makes it possible to pass
-    /// instances of derived classes as references to this base class
-    /// without losing access to derived class data.
-    ///
-    //@{
-    /// \brief The funtion operator
-    virtual void operator()(asio::error_code ec = asio::error_code(),
-                            size_t length = 0)
-    {
-        (*self_)(ec, length);
-    }
-
-    /// \brief Stop current running server
-    virtual void stop() { self_->stop();}
-
-    /// \brief Resume processing of the server coroutine after an 
-    /// asynchronous call (e.g., to the DNS Lookup provider) has completed.
-    ///
-    /// \param done If true, this signals the system there is an answer
-    ///             to return.
-    virtual void resume(const bool done) { self_->resume(done); }
-
-    /// \brief Indicate whether the server is able to send an answer
-    /// to a query.
-    ///
-    /// This is presently used only for testing purposes.
-    virtual bool hasAnswer() { return (self_->hasAnswer()); }
-
-    /// \brief Returns the current value of the 'coroutine' object
-    ///
-    /// This is a temporary method, intended to be used for debugging
-    /// purposes during development and removed later.  It allows
-    /// callers from outside the coroutine object to retrieve information
-    /// about its current state.
-    ///
-    /// \return The value of the 'coroutine' object
-    virtual int value() { return (self_->value()); }
-
-    /// \brief Returns a pointer to a clone of this DNSServer object.
-    ///
-    /// When a \c DNSServer object is copied or assigned, the result will
-    /// normally be another \c DNSServer object containing a copy
-    /// of the original "self_" pointer.  Calling clone() guarantees
-    /// that the underlying object is also correctly copied.
-    ///
-    /// \return A deep copy of this DNSServer object
-    virtual DNSServer* clone() { return (self_->clone()); }
-    //@}
-
-protected:
-    /// \brief Lookup handler object.
-    ///
-    /// This is a protected class; it can only be instantiated
-    /// from within a derived class of \c DNSServer.
-    ///
-    /// A server object that has received a query creates an instance
-    /// of this class and scheudles it on the ASIO service queue
-    /// using asio::io_service::post().  When the handler executes, it
-    /// calls the asyncLookup() method in the server object to start a
-    /// DNS lookup.  When the lookup is complete, the server object is
-    /// scheduled to resume, again using io_service::post().
-    ///
-    /// Note that the calling object is copied into the handler object,
-    /// not referenced.  This is because, once the calling object yields
-    /// control to the handler, it falls out of scope and may disappear
-    template <typename T>
-    class AsyncLookup {
-    public:
-        AsyncLookup(T& caller) : caller_(caller) {}
-        void operator()() { caller_.asyncLookup(); }
-    private:
-        T caller_;
-    };
-
-    /// \brief Carries out a DNS lookup.
-    ///
-    /// This function calls the \c DNSLookup object specified by the
-    /// DNS server when the \c IOService was created, passing along
-    /// the details of the query and a pointer back to the current
-    /// server object.  It is called asynchronously via the AsyncLookup
-    /// handler class.
-    virtual void asyncLookup() { self_->asyncLookup(); }
-
-private:
-    DNSServer* self_;
-};
-
-
-}      // asiolink
-#endif // __ASIOLINK_DNS_SERVER_H
diff --git a/src/lib/asiolink/dns_service.cc b/src/lib/asiolink/dns_service.cc
deleted file mode 100644
index f17bb44..0000000
--- a/src/lib/asiolink/dns_service.cc
+++ /dev/null
@@ -1,200 +0,0 @@
-// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
-//
-// Permission to use, copy, modify, and/or distribute this software for any
-// purpose with or without fee is hereby granted, provided that the above
-// copyright notice and this permission notice appear in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
-// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
-// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
-// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
-// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
-// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
-// PERFORMANCE OF THIS SOFTWARE.
-
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <unistd.h>             // for some IPC/network system calls
-
-#include <boost/lexical_cast.hpp>
-
-#include <config.h>
-
-#include <log/dummylog.h>
-
-#include <asio.hpp>
-#include <asiolink/dns_service.h>
-#include <asiolink/io_service.h>
-#include <asiolink/io_service.h>
-#include <asiolink/tcp_server.h>
-#include <asiolink/udp_server.h>
-
-#include <log/dummylog.h>
-
-#include <boost/lexical_cast.hpp>
-#include <boost/foreach.hpp>
-
-using isc::log::dlog;
-
-namespace asiolink {
-
-class SimpleCallback;
-class DNSLookup;
-class DNSAnswer;
-
-namespace {
-
-asio::ip::address
-convertAddr(const std::string& address) {
-    asio::error_code err;
-    asio::ip::address addr = asio::ip::address::from_string(address, err);
-    if (err) {
-        isc_throw(IOError, "Invalid IP address '" << &address << "': "
-            << err.message());
-    }
-    return (addr);
-}
-
-}
-
-
-class DNSServiceImpl {
-public:
-    DNSServiceImpl(IOService& io_service, const char& port,
-                  const asio::ip::address* v4addr,
-                  const asio::ip::address* v6addr,
-                  SimpleCallback* checkin, DNSLookup* lookup,
-                  DNSAnswer* answer);
-
-    IOService& io_service_;
-
-    typedef boost::shared_ptr<UDPServer> UDPServerPtr;
-    typedef boost::shared_ptr<TCPServer> TCPServerPtr;
-    typedef boost::shared_ptr<DNSServer> DNSServerPtr;
-    std::vector<DNSServerPtr> servers_;
-    SimpleCallback *checkin_;
-    DNSLookup *lookup_;
-    DNSAnswer *answer_;
-
-    void addServer(uint16_t port, const asio::ip::address& address) {
-        try {
-            dlog(std::string("Initialize TCP server at ") + address.to_string() + ":" + boost::lexical_cast<std::string>(port));
-            TCPServerPtr tcpServer(new TCPServer(io_service_.get_io_service(),
-                address, port, checkin_, lookup_, answer_));
-            (*tcpServer)();
-            servers_.push_back(tcpServer);
-            dlog(std::string("Initialize UDP server at ") + address.to_string() + ":" + boost::lexical_cast<std::string>(port));
-            UDPServerPtr udpServer(new UDPServer(io_service_.get_io_service(),
-                address, port, checkin_, lookup_, answer_));
-            (*udpServer)();
-            servers_.push_back(udpServer);
-        }
-        catch (const asio::system_error& err) {
-            // We need to catch and convert any ASIO level exceptions.
-            // This can happen for unavailable address, binding a privilege port
-            // without the privilege, etc.
-            isc_throw(IOError, "Failed to initialize network servers: " <<
-                      err.what());
-        }
-    }
-    void addServer(const char& port, const asio::ip::address& address) {
-        uint16_t portnum;
-        try {
-            // XXX: SunStudio with stlport4 doesn't reject some invalid
-            // representation such as "-1" by lexical_cast<uint16_t>, so
-            // we convert it into a signed integer of a larger size and perform
-            // range check ourselves.
-            const int32_t portnum32 = boost::lexical_cast<int32_t>(&port);
-            if (portnum32 < 0 || portnum32 > 65535) {
-                isc_throw(IOError, "Invalid port number '" << &port);
-            }
-            portnum = portnum32;
-        } catch (const boost::bad_lexical_cast& ex) {
-            isc_throw(IOError, "Invalid port number '" << &port << "': " <<
-                      ex.what());
-        }
-        addServer(portnum, address);
-    }
-};
-
-DNSServiceImpl::DNSServiceImpl(IOService& io_service,
-                               const char& port,
-                               const asio::ip::address* const v4addr,
-                               const asio::ip::address* const v6addr,
-                               SimpleCallback* checkin,
-                               DNSLookup* lookup,
-                               DNSAnswer* answer) :
-    io_service_(io_service),
-    checkin_(checkin),
-    lookup_(lookup),
-    answer_(answer)
-{
-
-    if (v4addr) {
-        addServer(port, *v4addr);
-    }
-    if (v6addr) {
-        addServer(port, *v6addr);
-    }
-}
-
-DNSService::DNSService(IOService& io_service,
-                       const char& port, const char& address,
-                       SimpleCallback* checkin,
-                       DNSLookup* lookup,
-                       DNSAnswer* answer) :
-    impl_(new DNSServiceImpl(io_service, port, NULL, NULL, checkin, lookup,
-        answer)), io_service_(io_service)
-{
-    addServer(port, &address);
-}
-
-DNSService::DNSService(IOService& io_service,
-                       const char& port,
-                       const bool use_ipv4, const bool use_ipv6,
-                       SimpleCallback* checkin,
-                       DNSLookup* lookup,
-                       DNSAnswer* answer) :
-    impl_(NULL), io_service_(io_service)
-{
-    const asio::ip::address v4addr_any =
-        asio::ip::address(asio::ip::address_v4::any());
-    const asio::ip::address* const v4addrp = use_ipv4 ? &v4addr_any : NULL; 
-    const asio::ip::address v6addr_any =
-        asio::ip::address(asio::ip::address_v6::any());
-    const asio::ip::address* const v6addrp = use_ipv6 ? &v6addr_any : NULL;
-    impl_ = new DNSServiceImpl(io_service, port, v4addrp, v6addrp, checkin, lookup, answer);
-}
-
-DNSService::DNSService(IOService& io_service, SimpleCallback* checkin,
-    DNSLookup* lookup, DNSAnswer *answer) :
-    impl_(new DNSServiceImpl(io_service, *"0", NULL, NULL, checkin, lookup,
-        answer)), io_service_(io_service)
-{
-}
-
-DNSService::~DNSService() {
-    delete impl_;
-}
-
-void
-DNSService::addServer(const char& port, const std::string& address) {
-    impl_->addServer(port, convertAddr(address));
-}
-
-void
-DNSService::addServer(uint16_t port, const std::string& address) {
-    impl_->addServer(port, convertAddr(address));
-}
-
-void
-DNSService::clearServers() {
-    BOOST_FOREACH(const DNSServiceImpl::DNSServerPtr& s, impl_->servers_) {
-        s->stop();
-    }
-    impl_->servers_.clear();
-}
-
-
-
-} // namespace asiolink
diff --git a/src/lib/asiolink/dns_service.h b/src/lib/asiolink/dns_service.h
deleted file mode 100644
index 9a3fb4c..0000000
--- a/src/lib/asiolink/dns_service.h
+++ /dev/null
@@ -1,112 +0,0 @@
-// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
-//
-// Permission to use, copy, modify, and/or distribute this software for any
-// purpose with or without fee is hereby granted, provided that the above
-// copyright notice and this permission notice appear in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
-// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
-// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
-// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
-// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
-// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
-// PERFORMANCE OF THIS SOFTWARE.
-
-#ifndef __ASIOLINK_DNS_SERVICE_H
-#define __ASIOLINK_DNS_SERVICE_H 1
-
-#include <resolve/resolver_interface.h>
-
-#include <asiolink/io_service.h>
-
-namespace asiolink {
-
-class SimpleCallback;
-class DNSLookup;
-class DNSAnswer;
-class DNSServiceImpl;
-
-/// \brief Handle DNS Queries
-///
-/// DNSService is the service that handles DNS queries and answers with
-/// a given IOService. This class is mainly intended to hold all the
-/// logic that is shared between the authoritative and the recursive
-/// server implementations. As such, it handles asio, including config
-/// updates (through the 'Checkinprovider'), and listening sockets.
-class DNSService {
-    ///
-    /// \name Constructors and Destructor
-    ///
-    /// Note: The copy constructor and the assignment operator are
-    /// intentionally defined as private, making this class non-copyable.
-    //@{
-private:
-    DNSService(const DNSService& source);
-    DNSService& operator=(const DNSService& source);
-
-public:
-    /// \brief The constructor with a specific IP address and port on which
-    /// the services listen on.
-    ///
-    /// \param io_service The IOService to work with
-    /// \param port the port to listen on
-    /// \param address the IP address to listen on
-    /// \param checkin Provider for cc-channel events (see \c SimpleCallback)
-    /// \param lookup The lookup provider (see \c DNSLookup)
-    /// \param answer The answer provider (see \c DNSAnswer)
-    DNSService(IOService& io_service, const char& port,
-               const char& address, SimpleCallback* checkin,
-               DNSLookup* lookup, DNSAnswer* answer);
-    /// \brief The constructor with a specific port on which the services
-    /// listen on.
-    ///
-    /// It effectively listens on "any" IPv4 and/or IPv6 addresses.
-    /// IPv4/IPv6 services will be available if and only if \c use_ipv4
-    /// or \c use_ipv6 is \c true, respectively.
-    ///
-    /// \param io_service The IOService to work with
-    /// \param port the port to listen on
-    /// \param use_ipv4 If true, listen on ipv4 'any'
-    /// \param use_ipv6 If true, listen on ipv6 'any'
-    /// \param checkin Provider for cc-channel events (see \c SimpleCallback)
-    /// \param lookup The lookup provider (see \c DNSLookup)
-    /// \param answer The answer provider (see \c DNSAnswer)
-    DNSService(IOService& io_service, const char& port,
-               const bool use_ipv4, const bool use_ipv6,
-               SimpleCallback* checkin, DNSLookup* lookup,
-               DNSAnswer* answer);
-    /// \brief The constructor without any servers.
-    ///
-    /// Use addServer() to add some servers.
-    DNSService(IOService& io_service, SimpleCallback* checkin,
-               DNSLookup* lookup, DNSAnswer* answer);
-    /// \brief The destructor.
-    ~DNSService();
-    //@}
-
-    /// \brief Add another server to the service
-    void addServer(uint16_t port, const std::string &address);
-    void addServer(const char &port, const std::string &address);
-    /// \brief Remove all servers from the service
-    void clearServers();
-
-    /// \brief Return the native \c io_service object used in this wrapper.
-    ///
-    /// This is a short term work around to support other BIND 10 modules
-    /// that share the same \c io_service with the authoritative server.
-    /// It will eventually be removed once the wrapper interface is
-    /// generalized.
-    asio::io_service& get_io_service() { return io_service_.get_io_service(); }
-
-    /// \brief Return the IO Service Object
-    ///
-    /// \return IOService object for this DNS service.
-    asiolink::IOService& getIOService() { return (io_service_);}
-
-private:
-    DNSServiceImpl* impl_;
-    IOService& io_service_;
-};
-
-}      // namespace asiolink
-#endif // __ASIOLINK_DNS_SERVICE_H




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