aboutsummaryrefslogtreecommitdiffstats
path: root/libs/minidns
diff options
context:
space:
mode:
authorSam Whited <sam@samwhited.com>2014-10-28 12:14:21 -0400
committerSam Whited <sam@samwhited.com>2014-10-28 12:14:21 -0400
commit4a1bae3a69a76cae0341b821e3b880e5b8b8f5a3 (patch)
treeebdcd62a7bae6e25b156e5b7dbc3c757f498bf36 /libs/minidns
parentccba01ef19e4febadc8e0f543b4958f33adbe8cf (diff)
Subtree merged in minidns
Diffstat (limited to '')
-rw-r--r--libs/minidns/.gitignore107
-rw-r--r--libs/minidns/LICENCE4
-rw-r--r--libs/minidns/LICENCE_APACHE178
-rw-r--r--libs/minidns/LICENCE_LGPL2.1503
-rw-r--r--libs/minidns/LICENCE_WTFPL13
-rw-r--r--libs/minidns/README.md8
-rw-r--r--libs/minidns/build.gradle77
-rw-r--r--libs/minidns/gradle.properties.example21
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/Client.java323
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/DNSCache.java23
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/DNSMessage.java524
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/LRUCache.java139
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/Question.java158
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/Record.java343
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/record/A.java43
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/record/AAAA.java49
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/record/CNAME.java46
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/record/Data.java34
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/record/NS.java15
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/record/PTR.java19
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/record/SRV.java124
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/record/TXT.java65
-rw-r--r--libs/minidns/src/main/java/de/measite/minidns/util/NameUtil.java129
23 files changed, 2945 insertions, 0 deletions
diff --git a/libs/minidns/.gitignore b/libs/minidns/.gitignore
new file mode 100644
index 00000000..2362cd05
--- /dev/null
+++ b/libs/minidns/.gitignore
@@ -0,0 +1,107 @@
+# From https://github.com/github/gitignore
+
+# # # # # # # # # # # #
+# Android gitignore #
+# # # # # # # # # # # #
+
+# Built application files
+*.apk
+*.ap_
+
+# Files for the Dalvik VM
+*.dex
+
+# Java class files
+*.class
+
+# Generated files
+bin/
+gen/
+
+# Gradle files
+.gradle/
+build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+gradle.properties
+
+# Proguard folder generated by Eclipse
+proguard/
+
+# # # # # # # #
+# VIM / Linux #
+# # # # # # # #
+
+[._]*.s[a-w][a-z]
+[._]s[a-w][a-z]
+*.un~
+Session.vim
+.netrwhist
+*~
+.directory
+
+# # # # # #
+# Eclipse #
+# # # # # #
+
+*.pydevproject
+.metadata
+.gradle
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+.settings/
+.loadpath
+.classpath
+.project
+
+# External tool builders
+.externalToolBuilders/
+
+# Locally stored "Eclipse launch configurations"
+*.launch
+
+# CDT-specific
+.cproject
+
+# PDT-specific
+.buildpath
+
+# sbteclipse plugin
+.target
+
+# TeXlipse plugin
+.texlipse
+
+# # # # #
+# OS X #
+# # # # #
+
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must ends with two \r.
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear on external disk
+.Spotlight-V100
+.Trashes
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+
diff --git a/libs/minidns/LICENCE b/libs/minidns/LICENCE
new file mode 100644
index 00000000..4c2ee7c0
--- /dev/null
+++ b/libs/minidns/LICENCE
@@ -0,0 +1,4 @@
+This software may be used under the terms of (at your choice)
+- LGPL version 2 (or later) (see LICENCE_LGPL2.1 for details)
+- Apache Software licence (see LICENCE_APACHE for details)
+- WTFPL (see LICENCE_WTFPL for details)
diff --git a/libs/minidns/LICENCE_APACHE b/libs/minidns/LICENCE_APACHE
new file mode 100644
index 00000000..e454a525
--- /dev/null
+++ b/libs/minidns/LICENCE_APACHE
@@ -0,0 +1,178 @@
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+ 1. Definitions.
+
+ "License" shall mean the terms and conditions for use, reproduction,
+ and distribution as defined by Sections 1 through 9 of this document.
+
+ "Licensor" shall mean the copyright owner or entity authorized by
+ the copyright owner that is granting the License.
+
+ "Legal Entity" shall mean the union of the acting entity and all
+ other entities that control, are controlled by, or are under common
+ control with that entity. For the purposes of this definition,
+ "control" means (i) the power, direct or indirect, to cause the
+ direction or management of such entity, whether by contract or
+ otherwise, or (ii) ownership of fifty percent (50%) or more of the
+ outstanding shares, or (iii) beneficial ownership of such entity.
+
+ "You" (or "Your") shall mean an individual or Legal Entity
+ exercising permissions granted by this License.
+
+ "Source" form shall mean the preferred form for making modifications,
+ including but not limited to software source code, documentation
+ source, and configuration files.
+
+ "Object" form shall mean any form resulting from mechanical
+ transformation or translation of a Source form, including but
+ not limited to compiled object code, generated documentation,
+ and conversions to other media types.
+
+ "Work" shall mean the work of authorship, whether in Source or
+ Object form, made available under the License, as indicated by a
+ copyright notice that is included in or attached to the work
+ (an example is provided in the Appendix below).
+
+ "Derivative Works" shall mean any work, whether in Source or Object
+ form, that is based on (or derived from) the Work and for which the
+ editorial revisions, annotations, elaborations, or other modifications
+ represent, as a whole, an original work of authorship. For the purposes
+ of this License, Derivative Works shall not include works that remain
+ separable from, or merely link (or bind by name) to the interfaces of,
+ the Work and Derivative Works thereof.
+
+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
+ to that Work or Derivative Works thereof, that is intentionally
+ submitted to Licensor for inclusion in the Work by the copyright owner
+ or by an individual or Legal Entity authorized to submit on behalf of
+ the copyright owner. For the purposes of this definition, "submitted"
+ means any form of electronic, verbal, or written communication sent
+ to the Licensor or its representatives, including but not limited to
+ communication on electronic mailing lists, source code control systems,
+ and issue tracking systems that are managed by, or on behalf of, the
+ Licensor for the purpose of discussing and improving the Work, but
+ excluding communication that is conspicuously marked or otherwise
+ designated in writing by the copyright owner as "Not a Contribution."
+
+ "Contributor" shall mean Licensor and any individual or Legal Entity
+ on behalf of whom a Contribution has been received by Licensor and
+ subsequently incorporated within the Work.
+
+ 2. Grant of Copyright License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ copyright license to reproduce, prepare Derivative Works of,
+ publicly display, publicly perform, sublicense, and distribute the
+ Work and such Derivative Works in Source or Object form.
+
+ 3. Grant of Patent License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ (except as stated in this section) patent license to make, have made,
+ use, offer to sell, sell, import, and otherwise transfer the Work,
+ where such license applies only to those patent claims licensable
+ by such Contributor that are necessarily infringed by their
+ Contribution(s) alone or by combination of their Contribution(s)
+ with the Work to which such Contribution(s) was submitted. If You
+ institute patent litigation against any entity (including a
+ cross-claim or counterclaim in a lawsuit) alleging that the Work
+ or a Contribution incorporated within the Work constitutes direct
+ or contributory patent infringement, then any patent licenses
+ granted to You under this License for that Work shall terminate
+ as of the date such litigation is filed.
+
+ 4. Redistribution. You may reproduce and distribute copies of the
+ Work or Derivative Works thereof in any medium, with or without
+ modifications, and in Source or Object form, provided that You
+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
+ Derivative Works a copy of this License; and
+
+ (b) You must cause any modified files to carry prominent notices
+ stating that You changed the files; and
+
+ (c) You must retain, in the Source form of any Derivative Works
+ that You distribute, all copyright, patent, trademark, and
+ attribution notices from the Source form of the Work,
+ excluding those notices that do not pertain to any part of
+ the Derivative Works; and
+
+ (d) If the Work includes a "NOTICE" text file as part of its
+ distribution, then any Derivative Works that You distribute must
+ include a readable copy of the attribution notices contained
+ within such NOTICE file, excluding those notices that do not
+ pertain to any part of the Derivative Works, in at least one
+ of the following places: within a NOTICE text file distributed
+ as part of the Derivative Works; within the Source form or
+ documentation, if provided along with the Derivative Works; or,
+ within a display generated by the Derivative Works, if and
+ wherever such third-party notices normally appear. The contents
+ of the NOTICE file are for informational purposes only and
+ do not modify the License. You may add Your own attribution
+ notices within Derivative Works that You distribute, alongside
+ or as an addendum to the NOTICE text from the Work, provided
+ that such additional attribution notices cannot be construed
+ as modifying the License.
+
+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+ 6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied, including, without limitation, any warranties or conditions
+ of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+ PARTICULAR PURPOSE. You are solely responsible for determining the
+ appropriateness of using or redistributing the Work and assume any
+ risks associated with Your exercise of permissions under this License.
+
+ 8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
+ result of this License or out of the use or inability to use the
+ Work (including but not limited to damages for loss of goodwill,
+ work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses), even if such Contributor
+ has been advised of the possibility of such damages.
+
+ 9. Accepting Warranty or Additional Liability. While redistributing
+ the Work or Derivative Works thereof, You may choose to offer,
+ and charge a fee for, acceptance of support, warranty, indemnity,
+ or other liability obligations and/or rights consistent with this
+ License. However, in accepting such obligations, You may act only
+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
+
+ END OF TERMS AND CONDITIONS
+
diff --git a/libs/minidns/LICENCE_LGPL2.1 b/libs/minidns/LICENCE_LGPL2.1
new file mode 100644
index 00000000..51a70cae
--- /dev/null
+++ b/libs/minidns/LICENCE_LGPL2.1
@@ -0,0 +1,503 @@
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL. It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+Licenses are intended to guarantee your freedom to share and change
+free software--to make sure the software is free for all its users.
+
+ This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it. You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
+strategy to use in any particular case, based on the explanations below.
+
+ When we speak of free software, we are referring to freedom of use,
+not price. Our General Public Licenses are designed to make sure that
+you have the freedom to distribute copies of free software (and charge
+for this service if you wish); that you receive source code or can get
+it if you want it; that you can change the software and use pieces of
+it in new free programs; and that you are informed that you can do
+these things.
+
+ To protect your rights, we need to make restrictions that forbid
+distributors to deny you these rights or to ask you to surrender these
+rights. These restrictions translate to certain responsibilities for
+you if you distribute copies of the library or if you modify it.
+
+ For example, if you distribute copies of the library, whether gratis
+or for a fee, you must give the recipients all the rights that we gave
+you. You must make sure that they, too, receive or can get the source
+code. If you link other code with the library, you must provide
+complete object files to the recipients, so that they can relink them
+with the library after making changes to the library and recompiling
+it. And you must show them these terms so they know their rights.
+
+ We protect your rights with a two-step method: (1) we copyright the
+library, and (2) we offer you this license, which gives you legal
+permission to copy, distribute and/or modify the library.
+
+ To protect each distributor, we want to make it very clear that
+there is no warranty for the free library. Also, if the library is
+modified by someone else and passed on, the recipients should know
+that what they have is not the original version, so that the original
+author's reputation will not be affected by problems that might be
+introduced by others.
+
+ Finally, software patents pose a constant threat to the existence of
+any free program. We wish to make sure that a company cannot
+effectively restrict the users of a free program by obtaining a
+restrictive license from a patent holder. Therefore, we insist that
+any patent license obtained for a version of the library must be
+consistent with the full freedom of use specified in this license.
+
+ Most GNU software, including some libraries, is covered by the
+ordinary GNU General Public License. This license, the GNU Lesser
+General Public License, applies to certain designated libraries, and
+is quite different from the ordinary General Public License. We use
+this license for certain libraries in order to permit linking those
+libraries into non-free programs.
+
+ When a program is linked with a library, whether statically or using
+a shared library, the combination of the two is legally speaking a
+combined work, a derivative of the original library. The ordinary
+General Public License therefore permits such linking only if the
+entire combination fits its criteria of freedom. The Lesser General
+Public License permits more lax criteria for linking other code with
+the library.
+
+ We call this license the "Lesser" General Public License because it
+does Less to protect the user's freedom than the ordinary General
+Public License. It also provides other free software developers Less
+of an advantage over competing non-free programs. These disadvantages
+are the reason we use the ordinary General Public License for many
+libraries. However, the Lesser license provides advantages in certain
+special circumstances.
+
+ For example, on rare occasions, there may be a special need to
+encourage the widest possible use of a certain library, so that it becomes
+a de-facto standard. To achieve this, non-free programs must be
+allowed to use the library. A more frequent case is that a free
+library does the same job as widely used non-free libraries. In this
+case, there is little to gain by limiting the free library to free
+software only, so we use the Lesser General Public License.
+
+ In other cases, permission to use a particular library in non-free
+programs enables a greater number of people to use a large body of
+free software. For example, permission to use the GNU C Library in
+non-free programs enables many more people to use the whole GNU
+operating system, as well as its variant, the GNU/Linux operating
+system.
+
+ Although the Lesser General Public License is Less protective of the
+users' freedom, it does ensure that the user of a program that is
+linked with the Library has the freedom and the wherewithal to run
+that program using a modified version of the Library.
+
+ The precise terms and conditions for copying, distribution and
+modification follow. Pay close attention to the difference between a
+"work based on the library" and a "work that uses the library". The
+former contains code derived from the library, whereas the latter must
+be combined with the library in order to run.
+
+ GNU LESSER GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License Agreement applies to any software library or other
+program which contains a notice placed by the copyright holder or
+other authorized party saying it may be distributed under the terms of
+this Lesser General Public License (also called "this License").
+Each licensee is addressed as "you".
+
+ A "library" means a collection of software functions and/or data
+prepared so as to be conveniently linked with application programs
+(which use some of those functions and data) to form executables.
+
+ The "Library", below, refers to any such software library or work
+which has been distributed under these terms. A "work based on the
+Library" means either the Library or any derivative work under
+copyright law: that is to say, a work containing the Library or a
+portion of it, either verbatim or with modifications and/or translated
+straightforwardly into another language. (Hereinafter, translation is
+included without limitation in the term "modification".)
+
+ "Source code" for a work means the preferred form of the work for
+making modifications to it. For a library, complete source code means
+all the source code for all modules it contains, plus any associated
+interface definition files, plus the scripts used to control compilation
+and installation of the library.
+
+ Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of
+running a program using the Library is not restricted, and output from
+such a program is covered only if its contents constitute a work based
+on the Library (independent of the use of the Library in a tool for
+writing it). Whether that is true depends on what the Library does
+and what the program that uses the Library does.
+
+ 1. You may copy and distribute verbatim copies of the Library's
+complete source code as you receive it, in any medium, provided that
+you conspicuously and appropriately publish on each copy an
+appropriate copyright notice and disclaimer of warranty; keep intact
+all the notices that refer to this License and to the absence of any
+warranty; and distribute a copy of this License along with the
+Library.
+
+ You may charge a fee for the physical act of transferring a copy,
+and you may at your option offer warranty protection in exchange for a
+fee.
+
+ 2. You may modify your copy or copies of the Library or any portion
+of it, thus forming a work based on the Library, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+ a) The modified work must itself be a software library.
+
+ b) You must cause the files modified to carry prominent notices
+ stating that you changed the files and the date of any change.
+
+ c) You must cause the whole of the work to be licensed at no
+ charge to all third parties under the terms of this License.
+
+ d) If a facility in the modified Library refers to a function or a
+ table of data to be supplied by an application program that uses
+ the facility, other than as an argument passed when the facility
+ is invoked, then you must make a good faith effort to ensure that,
+ in the event an application does not supply such function or
+ table, the facility still operates, and performs whatever part of
+ its purpose remains meaningful.
+
+ (For example, a function in a library to compute square roots has
+ a purpose that is entirely well-defined independent of the
+ application. Therefore, Subsection 2d requires that any
+ application-supplied function or table used by this function must
+ be optional: if the application does not supply it, the square
+ root function must still compute square roots.)
+
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Library,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works. But when you
+distribute the same sections as part of a whole which is a work based
+on the Library, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote
+it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Library.
+
+In addition, mere aggregation of another work not based on the Library
+with the Library (or with a work based on the Library) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+ 3. You may opt to apply the terms of the ordinary GNU General Public
+License instead of this License to a given copy of the Library. To do
+this, you must alter all the notices that refer to this License, so
+that they refer to the ordinary GNU General Public License, version 2,
+instead of to this License. (If a newer version than version 2 of the
+ordinary GNU General Public License has appeared, then you can specify
+that version instead if you wish.) Do not make any other change in
+these notices.
+
+ Once this change is made in a given copy, it is irreversible for
+that copy, so the ordinary GNU General Public License applies to all
+subsequent copies and derivative works made from that copy.
+
+ This option is useful when you wish to copy part of the code of
+the Library into a program that is not a library.
+
+ 4. You may copy and distribute the Library (or a portion or
+derivative of it, under Section 2) in object code or executable form
+under the terms of Sections 1 and 2 above provided that you accompany
+it with the complete corresponding machine-readable source code, which
+must be distributed under the terms of Sections 1 and 2 above on a
+medium customarily used for software interchange.
+
+ If distribution of object code is made by offering access to copy
+from a designated place, then offering equivalent access to copy the
+source code from the same place satisfies the requirement to
+distribute the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+ 5. A program that contains no derivative of any portion of the
+Library, but is designed to work with the Library by being compiled or
+linked with it, is called a "work that uses the Library". Such a
+work, in isolation, is not a derivative work of the Library, and
+therefore falls outside the scope of this License.
+
+ However, linking a "work that uses the Library" with the Library
+creates an executable that is a derivative of the Library (because it
+contains portions of the Library), rather than a "work that uses the
+library". The executable is therefore covered by this License.
+Section 6 states terms for distribution of such executables.
+
+ When a "work that uses the Library" uses material from a header file
+that is part of the Library, the object code for the work may be a
+derivative work of the Library even though the source code is not.
+Whether this is true is especially significant if the work can be
+linked without the Library, or if the work is itself a library. The
+threshold for this to be true is not precisely defined by law.
+
+ If such an object file uses only numerical parameters, data
+structure layouts and accessors, and small macros and small inline
+functions (ten lines or less in length), then the use of the object
+file is unrestricted, regardless of whether it is legally a derivative
+work. (Executables containing this object code plus portions of the
+Library will still fall under Section 6.)
+
+ Otherwise, if the work is a derivative of the Library, you may
+distribute the object code for the work under the terms of Section 6.
+Any executables containing that work also fall under Section 6,
+whether or not they are linked directly with the Library itself.
+
+ 6. As an exception to the Sections above, you may also combine or
+link a "work that uses the Library" with the Library to produce a
+work containing portions of the Library, and distribute that work
+under terms of your choice, provided that the terms permit
+modification of the work for the customer's own use and reverse
+engineering for debugging such modifications.
+
+ You must give prominent notice with each copy of the work that the
+Library is used in it and that the Library and its use are covered by
+this License. You must supply a copy of this License. If the work
+during execution displays copyright notices, you must include the
+copyright notice for the Library among them, as well as a reference
+directing the user to the copy of this License. Also, you must do one
+of these things:
+
+ a) Accompany the work with the complete corresponding
+ machine-readable source code for the Library including whatever
+ changes were used in the work (which must be distributed under
+ Sections 1 and 2 above); and, if the work is an executable linked
+ with the Library, with the complete machine-readable "work that
+ uses the Library", as object code and/or source code, so that the
+ user can modify the Library and then relink to produce a modified
+ executable containing the modified Library. (It is understood
+ that the user who changes the contents of definitions files in the
+ Library will not necessarily be able to recompile the application
+ to use the modified definitions.)
+
+ b) Use a suitable shared library mechanism for linking with the
+ Library. A suitable mechanism is one that (1) uses at run time a
+ copy of the library already present on the user's computer system,
+ rather than copying library functions into the executable, and (2)
+ will operate properly with a modified version of the library, if
+ the user installs one, as long as the modified version is
+ interface-compatible with the version that the work was made with.
+
+ c) Accompany the work with a written offer, valid for at
+ least three years, to give the same user the materials
+ specified in Subsection 6a, above, for a charge no more
+ than the cost of performing this distribution.
+
+ d) If distribution of the work is made by offering access to copy
+ from a designated place, offer equivalent access to copy the above
+ specified materials from the same place.
+
+ e) Verify that the user has already received a copy of these
+ materials or that you have already sent this user a copy.
+
+ For an executable, the required form of the "work that uses the
+Library" must include any data and utility programs needed for
+reproducing the executable from it. However, as a special exception,
+the materials to be distributed need not include anything that is
+normally distributed (in either source or binary form) with the major
+components (compiler, kernel, and so on) of the operating system on
+which the executable runs, unless that component itself accompanies
+the executable.
+
+ It may happen that this requirement contradicts the license
+restrictions of other proprietary libraries that do not normally
+accompany the operating system. Such a contradiction means you cannot
+use both them and the Library together in an executable that you
+distribute.
+
+ 7. You may place library facilities that are a work based on the
+Library side-by-side in a single library together with other library
+facilities not covered by this License, and distribute such a combined
+library, provided that the separate distribution of the work based on
+the Library and of the other library facilities is otherwise
+permitted, and provided that you do these two things:
+
+ a) Accompany the combined library with a copy of the same work
+ based on the Library, uncombined with any other library
+ facilities. This must be distributed under the terms of the
+ Sections above.
+
+ b) Give prominent notice with the combined library of the fact
+ that part of it is a work based on the Library, and explaining
+ where to find the accompanying uncombined form of the same work.
+
+ 8. You may not copy, modify, sublicense, link with, or distribute
+the Library except as expressly provided under this License. Any
+attempt otherwise to copy, modify, sublicense, link with, or
+distribute the Library is void, and will automatically terminate your
+rights under this License. However, parties who have received copies,
+or rights, from you under this License will not have their licenses
+terminated so long as such parties remain in full compliance.
+
+ 9. You are not required to accept this License, since you have not
+signed it. However, nothing else grants you permission to modify or
+distribute the Library or its derivative works. These actions are
+prohibited by law if you do not accept this License. Therefore, by
+modifying or distributing the Library (or any work based on the
+Library), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Library or works based on it.
+
+ 10. Each time you redistribute the Library (or any work based on the
+Library), the recipient automatically receives a license from the
+original licensor to copy, distribute, link with or modify the Library
+subject to these terms and conditions. You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties with
+this License.
+
+ 11. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Library at all. For example, if a patent
+license would not permit royalty-free redistribution of the Library by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Library.
+
+If any portion of this section is held invalid or unenforceable under any
+particular circumstance, the balance of the section is intended to apply,
+and the section as a whole is intended to apply in other circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system which is
+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+ 12. If the distribution and/or use of the Library is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Library under this License may add
+an explicit geographical distribution limitation excluding those countries,
+so that distribution is permitted only in or among countries not thus
+excluded. In such case, this License incorporates the limitation as if
+written in the body of this License.
+
+ 13. The Free Software Foundation may publish revised and/or new
+versions of the Lesser General Public License from time to time.
+Such new versions will be similar in spirit to the present version,
+but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Library
+specifies a version number of this License which applies to it and
+"any later version", you have the option of following the terms and
+conditions either of that version or of any later version published by
+the Free Software Foundation. If the Library does not specify a
+license version number, you may choose any version ever published by
+the Free Software Foundation.
+
+ 14. If you wish to incorporate parts of the Library into other free
+programs whose distribution conditions are incompatible with these,
+write to the author to ask for permission. For software which is
+copyrighted by the Free Software Foundation, write to the Free
+Software Foundation; we sometimes make exceptions for this. Our
+decision will be guided by the two goals of preserving the free status
+of all derivatives of our free software and of promoting the sharing
+and reuse of software generally.
+
+ NO WARRANTY
+
+ 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
+LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
+LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Libraries
+
+ If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change. You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+ To apply these terms, attach the following notices to the library. It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the library's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the
+ library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+ <signature of Ty Coon>, 1 April 1990
+ Ty Coon, President of Vice
+
+That's all there is to it!
+
diff --git a/libs/minidns/LICENCE_WTFPL b/libs/minidns/LICENCE_WTFPL
new file mode 100644
index 00000000..652d3783
--- /dev/null
+++ b/libs/minidns/LICENCE_WTFPL
@@ -0,0 +1,13 @@
+ DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+ Version 2, December 2004
+
+ Copyright (C) 2014 Rene Treffer <treffer+wtfpl@measite.de>
+
+ Everyone is permitted to copy and distribute verbatim or modified
+ copies of this license document, and changing it is allowed as long
+ as the name is changed.
+
+ DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. You just DO WHAT THE FUCK YOU WANT TO.
diff --git a/libs/minidns/README.md b/libs/minidns/README.md
new file mode 100644
index 00000000..3c1417a1
--- /dev/null
+++ b/libs/minidns/README.md
@@ -0,0 +1,8 @@
+MiniDNS
+-------
+
+MiniDNS is a minimal dns client library for android. It can parse a basic set
+of resource records (A, AAAA, NS, SRV) and is easy to use and extend.
+
+This library is not intended to be used as a DNS server. You might want to
+look into dnsjava for such functionality.
diff --git a/libs/minidns/build.gradle b/libs/minidns/build.gradle
new file mode 100644
index 00000000..5941beaf
--- /dev/null
+++ b/libs/minidns/build.gradle
@@ -0,0 +1,77 @@
+apply plugin: 'java'
+apply plugin: 'eclipse'
+apply plugin: 'osgi'
+apply plugin: 'nexus'
+
+buildscript {
+ repositories {
+ jcenter()
+ mavenLocal()
+ mavenCentral()
+ }
+
+ dependencies {
+ classpath 'org.gradle.api.plugins:gradle-nexus-plugin:0.7.1'
+ }
+}
+
+group = 'de.measite.minidns'
+description = "A minimal DNS client library with support for A, AAAA, NS and SRV records"
+sourceCompatibility = 1.7
+version = 'git tag --points-at HEAD'.execute().text.trim()
+isSNAPSHOT = 'git rev-parse --abbrev-ref HEAD'.execute().text.trim() == 'master'
+
+if (isSNAPSHOT) {
+ version = version + '-SNAPSHOT'
+}
+
+repositories {
+ mavenLocal()
+ mavenCentral()
+}
+
+nexus {
+ attachSources = true
+ attachTests = false
+ attachJavadoc = true
+ sign = true
+}
+
+modifyPom {
+ project {
+ name 'minidns'
+ description 'Minimal DNS library for java and android systems'
+ url 'https://github.com/rtreffer/minidns'
+ inceptionYear '2014'
+
+ scm {
+ url 'https://github.com/rtreffer/minidns'
+ connection 'scm:https://github.com/rtreffer/minidns'
+ developerConnection 'scm:git://github.com/rtreffer/minidns.git'
+ }
+
+ licenses {
+ license {
+ name 'The Apache Software License, Version 2.0'
+ url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+ distribution 'repo'
+ }
+ }
+
+ developers {
+ developer {
+ id 'rtreffer'
+ name 'Rene Treffer'
+ email 'treffer@measite.de'
+ }
+ developer {
+ id 'flow'
+ name 'Florian Schmaus'
+ email 'flow@geekplace.eu'
+ }
+ }
+ }
+}
+
+dependencies {
+} \ No newline at end of file
diff --git a/libs/minidns/gradle.properties.example b/libs/minidns/gradle.properties.example
new file mode 100644
index 00000000..68ffc418
--- /dev/null
+++ b/libs/minidns/gradle.properties.example
@@ -0,0 +1,21 @@
+# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
+#
+# GPG settings
+#
+
+# gpg key id
+#signing.keyId=DEADBEEF
+# the gpg key passphrase
+#signing.password=correcthorsebatterystaple
+# gpg keyring (this is the default gnupg keyring containing private keys)
+#signing.secretKeyRingFile=/home/ubuntu/.gnupg/secring.gpg
+
+# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
+#
+# nexus settings
+#
+
+# the nexus username used for log in
+#nexusUsername=ubuntu
+# the nexus password
+#nexusPassword=correcthorsebatterystaple
diff --git a/libs/minidns/src/main/java/de/measite/minidns/Client.java b/libs/minidns/src/main/java/de/measite/minidns/Client.java
new file mode 100644
index 00000000..827aa772
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/Client.java
@@ -0,0 +1,323 @@
+package de.measite.minidns;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.LineNumberReader;
+import java.lang.reflect.Method;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Random;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import de.measite.minidns.Record.CLASS;
+import de.measite.minidns.Record.TYPE;
+
+/**
+ * A minimal DNS client for SRV/A/AAAA/NS and CNAME lookups, with IDN support.
+ * This circumvents the missing javax.naming package on android.
+ */
+public class Client {
+
+ private static final Logger LOGGER = Logger.getLogger(Client.class.getName());
+
+ /**
+ * The internal random class for sequence generation.
+ */
+ protected Random random;
+
+ /**
+ * The buffer size for dns replies.
+ */
+ protected int bufferSize = 1500;
+
+ /**
+ * DNS timeout.
+ */
+ protected int timeout = 5000;
+
+ /**
+ * The internal DNS cache.
+ */
+ protected DNSCache cache;
+
+ /**
+ * Create a new DNS client with the given DNS cache.
+ * @param cache The backend DNS cache.
+ */
+ public Client(DNSCache cache) {
+ try {
+ random = SecureRandom.getInstance("SHA1PRNG");
+ } catch (NoSuchAlgorithmException e1) {
+ random = new SecureRandom();
+ }
+ this.cache = cache;
+ }
+
+ /**
+ * Create a new DNS client.
+ */
+ public Client() {
+ this(null);
+ }
+
+ /**
+ * Query a nameserver for a single entry.
+ * @param name The DNS name to request.
+ * @param type The DNS type to request (SRV, A, AAAA, ...).
+ * @param clazz The class of the request (usually IN for Internet).
+ * @param host The DNS server host.
+ * @param port The DNS server port.
+ * @return The response (or null on timeout / failure).
+ * @throws IOException On IO Errors.
+ */
+ public DNSMessage query(String name, TYPE type, CLASS clazz, String host, int port)
+ throws IOException
+ {
+ Question q = new Question(name, type, clazz);
+ return query(q, host, port);
+ }
+
+ /**
+ * Query a nameserver for a single entry.
+ * @param name The DNS name to request.
+ * @param type The DNS type to request (SRV, A, AAAA, ...).
+ * @param clazz The class of the request (usually IN for Internet).
+ * @param host The DNS server host.
+ * @return The response (or null on timeout / failure).
+ * @throws IOException On IO Errors.
+ */
+ public DNSMessage query(String name, TYPE type, CLASS clazz, String host)
+ throws IOException
+ {
+ Question q = new Question(name, type, clazz);
+ return query(q, host);
+ }
+
+ /**
+ * Query the system nameserver for a single entry.
+ * @param name The DNS name to request.
+ * @param type The DNS type to request (SRV, A, AAAA, ...).
+ * @param clazz The class of the request (usually IN for Internet).
+ * @return The response (or null on timeout/error).
+ * @return The DNSMessage reply or null.
+ */
+ public DNSMessage query(String name, TYPE type, CLASS clazz)
+ {
+ Question q = new Question(name, type, clazz);
+ return query(q);
+ }
+
+ /**
+ * Query a specific server for one entry.
+ * @param q The question section of the DNS query.
+ * @param host The dns server host.
+ * @return The response (or null on timeout/error).
+ * @throws IOException On IOErrors.
+ */
+ public DNSMessage query(Question q, String host) throws IOException {
+ return query(q, host, 53);
+ }
+
+ /**
+ * Query a specific server for one entry.
+ * @param q The question section of the DNS query.
+ * @param host The dns server host.
+ * @param port the dns port.
+ * @return The response (or null on timeout/error).
+ * @throws IOException On IOErrors.
+ */
+ public DNSMessage query(Question q, String host, int port) throws IOException {
+ DNSMessage dnsMessage = (cache == null) ? null : cache.get(q);
+ if (dnsMessage != null) {
+ return dnsMessage;
+ }
+ DNSMessage message = new DNSMessage();
+ message.setQuestions(new Question[]{q});
+ message.setRecursionDesired(true);
+ message.setId(random.nextInt());
+ byte[] buf = message.toArray();
+ try (DatagramSocket socket = new DatagramSocket()) {
+ DatagramPacket packet = new DatagramPacket(buf, buf.length,
+ InetAddress.getByName(host), port);
+ socket.setSoTimeout(timeout);
+ socket.send(packet);
+ packet = new DatagramPacket(new byte[bufferSize], bufferSize);
+ socket.receive(packet);
+ dnsMessage = DNSMessage.parse(packet.getData());
+ if (dnsMessage.getId() != message.getId()) {
+ return null;
+ }
+ for (Record record : dnsMessage.getAnswers()) {
+ if (record.isAnswer(q)) {
+ if (cache != null) {
+ cache.put(q, dnsMessage);
+ }
+ break;
+ }
+ }
+ return dnsMessage;
+ }
+ }
+
+ /**
+ * Query the system DNS server for one entry.
+ * @param q The question section of the DNS query.
+ * @return The response (or null on timeout/error).
+ */
+ public DNSMessage query(Question q) {
+ // While this query method does in fact re-use query(Question, String)
+ // we still do a cache lookup here in order to avoid unnecessary
+ // findDNS()calls, which are expensive on Android. Note that we do not
+ // put the results back into the Cache, as this is already done by
+ // query(Question, String).
+ DNSMessage message = cache.get(q);
+ if (message != null) {
+ return message;
+ }
+ String dnsServer[] = findDNS();
+ for (String dns : dnsServer) {
+ try {
+ message = query(q, dns);
+ if (message == null) {
+ continue;
+ }
+ if (message.getResponseCode() !=
+ DNSMessage.RESPONSE_CODE.NO_ERROR) {
+ continue;
+ }
+ for (Record record: message.getAnswers()) {
+ if (record.isAnswer(q)) {
+ return message;
+ }
+ }
+ } catch (IOException ioe) {
+ LOGGER.log(Level.FINE, "IOException in query", ioe);
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Retrieve a list of currently configured DNS servers.
+ * @return The server array.
+ */
+ public String[] findDNS() {
+ String[] result = findDNSByReflection();
+ if (result != null) {
+ LOGGER.fine("Got DNS servers via reflection: " + Arrays.toString(result));
+ return result;
+ }
+
+ result = findDNSByExec();
+ if (result != null) {
+ LOGGER.fine("Got DNS servers via exec: " + Arrays.toString(result));
+ return result;
+ }
+
+ // fallback for ipv4 and ipv6 connectivity
+ // see https://developers.google.com/speed/public-dns/docs/using
+ LOGGER.fine("No DNS found? Using fallback [8.8.8.8, [2001:4860:4860::8888]]");
+
+ return new String[]{"8.8.8.8", "[2001:4860:4860::8888]"};
+ }
+
+ /**
+ * Try to retrieve the list of dns server by executing getprop.
+ * @return Array of servers, or null on failure.
+ */
+ protected String[] findDNSByExec() {
+ try {
+ Process process = Runtime.getRuntime().exec("getprop");
+ InputStream inputStream = process.getInputStream();
+ LineNumberReader lnr = new LineNumberReader(
+ new InputStreamReader(inputStream));
+ String line = null;
+ HashSet<String> server = new HashSet<String>(6);
+ while ((line = lnr.readLine()) != null) {
+ int split = line.indexOf("]: [");
+ if (split == -1) {
+ continue;
+ }
+ String property = line.substring(1, split);
+ String value = line.substring(split + 4, line.length() - 1);
+ if (property.endsWith(".dns") || property.endsWith(".dns1") ||
+ property.endsWith(".dns2") || property.endsWith(".dns3") ||
+ property.endsWith(".dns4")) {
+
+ // normalize the address
+
+ InetAddress ip = InetAddress.getByName(value);
+
+ if (ip == null) continue;
+
+ value = ip.getHostAddress();
+
+ if (value == null) continue;
+ if (value.length() == 0) continue;
+
+ server.add(value);
+ }
+ }
+ if (server.size() > 0) {
+ return server.toArray(new String[server.size()]);
+ }
+ } catch (IOException e) {
+ LOGGER.log(Level.WARNING, "Exception in findDNSByExec", e);
+ }
+ return null;
+ }
+
+ /**
+ * Try to retrieve the list of dns server by calling SystemProperties.
+ * @return Array of servers, or null on failure.
+ */
+ protected String[] findDNSByReflection() {
+ try {
+ Class<?> SystemProperties =
+ Class.forName("android.os.SystemProperties");
+ Method method = SystemProperties.getMethod("get",
+ new Class[] { String.class });
+
+ ArrayList<String> servers = new ArrayList<String>(5);
+
+ for (String propKey : new String[] {
+ "net.dns1", "net.dns2", "net.dns3", "net.dns4"}) {
+
+ String value = (String)method.invoke(null, propKey);
+
+ if (value == null) continue;
+ if (value.length() == 0) continue;
+ if (servers.contains(value)) continue;
+
+ InetAddress ip = InetAddress.getByName(value);
+
+ if (ip == null) continue;
+
+ value = ip.getHostAddress();
+
+ if (value == null) continue;
+ if (value.length() == 0) continue;
+ if (servers.contains(value)) continue;
+
+ servers.add(value);
+ }
+
+ if (servers.size() > 0) {
+ return servers.toArray(new String[servers.size()]);
+ }
+ } catch (Exception e) {
+ // we might trigger some problems this way
+ LOGGER.log(Level.WARNING, "Exception in findDNSByReflection", e);
+ }
+ return null;
+ }
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/DNSCache.java b/libs/minidns/src/main/java/de/measite/minidns/DNSCache.java
new file mode 100644
index 00000000..14a3a776
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/DNSCache.java
@@ -0,0 +1,23 @@
+package de.measite.minidns;
+
+/**
+ * Cache for DNS Entries. Implementations must be thread safe.
+ */
+public interface DNSCache {
+
+ /**
+ * Add an an dns answer/response for a given dns question. Implementations
+ * should honor the ttl / receive timestamp.
+ * @param q The question.
+ * @param message The dns message.
+ */
+ void put(Question q, DNSMessage message);
+
+ /**
+ * Request a cached dns response.
+ * @param q The dns question.
+ * @return The dns message.
+ */
+ DNSMessage get(Question q);
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/DNSMessage.java b/libs/minidns/src/main/java/de/measite/minidns/DNSMessage.java
new file mode 100644
index 00000000..ab2535ce
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/DNSMessage.java
@@ -0,0 +1,524 @@
+package de.measite.minidns;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.Arrays;
+
+/**
+ * A DNS message as defined by rfc1035. The message consists of a header and
+ * 4 sections: question, answer, nameserver and addition resource record
+ * section.
+ * A message can either be parsed ({@link DNSMessage#parse(byte[])}) or serialized
+ * ({@link DNSMessage#toArray()}).
+ */
+public class DNSMessage {
+
+ /**
+ * Possible DNS reply codes.
+ */
+ public static enum RESPONSE_CODE {
+ NO_ERROR(0), FORMAT_ERR(1), SERVER_FAIL(2), NX_DOMAIN(3),
+ NO_IMP(4), REFUSED(5), YXDOMAIN(6), YXRRSET(7),
+ NXRRSET(8), NOT_AUTH(9),NOT_ZONE(10);
+
+ /**
+ * Reverse lookup table for response codes.
+ */
+ private final static RESPONSE_CODE INVERSE_LUT[] = new RESPONSE_CODE[]{
+ NO_ERROR, FORMAT_ERR, SERVER_FAIL, NX_DOMAIN, NO_IMP,
+ REFUSED, YXDOMAIN, YXRRSET, NXRRSET, NOT_AUTH, NOT_ZONE,
+ null, null, null, null, null
+ };
+
+ /**
+ * The response code value.
+ */
+ private final byte value;
+
+ /**
+ * Create a new response code.
+ * @param value The response code value.
+ */
+ private RESPONSE_CODE(int value) {
+ this.value = (byte)value;
+ }
+
+ /**
+ * Retrieve the byte value of the response code.
+ * @return the response code.
+ */
+ public byte getValue() {
+ return (byte) value;
+ }
+
+ /**
+ * Retrieve the response code for a byte value.
+ * @param value The byte value.
+ * @return The symbolic response code or null.
+ * @throws IllegalArgumentException if the value is not in the range of
+ * 0..15.
+ */
+ public static RESPONSE_CODE getResponseCode(int value) {
+ if (value < 0 || value > 15) {
+ throw new IllegalArgumentException();
+ }
+ return INVERSE_LUT[value];
+ }
+
+ };
+
+ /**
+ * Symbolic DNS Opcode values.
+ */
+ public static enum OPCODE {
+ QUERY(0),
+ INVERSE_QUERY(1),
+ STATUS(2),
+ NOTIFY(4),
+ UPDATE(5);
+
+ /**
+ * Lookup table for for obcode reolution.
+ */
+ private final static OPCODE INVERSE_LUT[] = new OPCODE[]{
+ QUERY, INVERSE_QUERY, STATUS, null, NOTIFY, UPDATE, null,
+ null, null, null, null, null, null, null, null
+ };
+
+ /**
+ * The value of this opcode.
+ */
+ private final byte value;
+
+ /**
+ * Create a new opcode for a given byte value.
+ * @param value The byte value of the opcode.
+ */
+ private OPCODE(int value) {
+ this.value = (byte)value;
+ }
+
+ /**
+ * Retrieve the byte value of this opcode.
+ * @return The byte value of this opcode.
+ */
+ public byte getValue() {
+ return value;
+ }
+
+ /**
+ * Retrieve the symbolic name of an opcode byte.
+ * @param value The byte value of the opcode.
+ * @return The symbolic opcode or null.
+ * @throws IllegalArgumentException If the byte value is not in the
+ * range 0..15.
+ */
+ public static OPCODE getOpcode(int value) {
+ if (value < 0 || value > 15) {
+ throw new IllegalArgumentException();
+ }
+ return INVERSE_LUT[value];
+ }
+
+ };
+
+ /**
+ * The DNS message id.
+ */
+ protected int id;
+
+ /**
+ * The DNS message opcode.
+ */
+ protected OPCODE opcode;
+
+ /**
+ * The response code of this dns message.
+ */
+ protected RESPONSE_CODE responseCode;
+
+ /**
+ * True if this is a query.
+ */
+ protected boolean query;
+
+ /**
+ * True if this is a authorative response.
+ */
+ protected boolean authoritativeAnswer;
+
+ /**
+ * True on truncate, tcp should be used.
+ */
+ protected boolean truncated;
+
+ /**
+ * True if the server should recurse.
+ */
+ protected boolean recursionDesired;
+
+ /**
+ * True if recursion is possible.
+ */
+ protected boolean recursionAvailable;
+
+ /**
+ * True if the server regarded the response as authentic.
+ */
+ protected boolean authenticData;
+
+ /**
+ * True if the server should not check the replies.
+ */
+ protected boolean checkDisabled;
+
+ /**
+ * The question section content.
+ */
+ protected Question questions[];
+
+ /**
+ * The answers section content.
+ */
+ protected Record answers[];
+
+ /**
+ * The nameserver records.
+ */
+ protected Record nameserverRecords[];
+
+ /**
+ * Additional resousrce records.
+ */
+ protected Record additionalResourceRecords[];
+
+ /**
+ * The receive timestamp of this message.
+ */
+ protected long receiveTimestamp;
+
+ /**
+ * Retrieve the current DNS message id.
+ * @return The current DNS message id.
+ */
+ public int getId() {
+ return id;
+ }
+
+ /**
+ * Set the current DNS message id.
+ * @param id The new DNS message id.
+ */
+ public void setId(int id) {
+ this.id = id & 0xffff;
+ }
+
+ /**
+ * Get the receive timestamp if this message was created via parse.
+ * This should be used to evaluate TTLs.
+ * @return The receive timestamp in milliseconds.
+ */
+ public long getReceiveTimestamp() {
+ return receiveTimestamp;
+ }
+
+ /**
+ * Retrieve the query type (true or false;
+ * @return True if this DNS message is a query.
+ */
+ public boolean isQuery() {
+ return query;
+ }
+
+ /**
+ * Set the query status of this message.
+ * @param query The new query status.
+ */
+ public void setQuery(boolean query) {
+ this.query = query;
+ }
+
+ /**
+ * True if the DNS message is an authoritative answer.
+ * @return True if this an authoritative DNS message.
+ */
+ public boolean isAuthoritativeAnswer() {
+ return authoritativeAnswer;
+ }
+
+ /**
+ * Set the authoritative answer flag.
+ * @param authoritativeAnswer Tge new authoritative answer value.
+ */
+ public void setAuthoritativeAnswer(boolean authoritativeAnswer) {
+ this.authoritativeAnswer = authoritativeAnswer;
+ }
+
+ /**
+ * Retrieve the truncation status of this message. True means that the
+ * client should try a tcp lookup.
+ * @return True if this message was truncated.
+ */
+ public boolean isTruncated() {
+ return truncated;
+ }
+
+ /**
+ * Set the truncation bit on this DNS message.
+ * @param truncated The new truncated bit status.
+ */
+ public void setTruncated(boolean truncated) {
+ this.truncated = truncated;
+ }
+
+ /**
+ * Check if this message preferes recursion.
+ * @return True if recursion is desired.
+ */
+ public boolean isRecursionDesired() {
+ return recursionDesired;
+ }
+
+ /**
+ * Set the recursion desired flag on this message.
+ * @param recursionDesired The new recusrion setting.
+ */
+ public void setRecursionDesired(boolean recursionDesired) {
+ this.recursionDesired = recursionDesired;
+ }
+
+ /**
+ * Retrieve the recursion available flag of this DNS message.
+ * @return The recursion available flag of this message.
+ */
+ public boolean isRecursionAvailable() {
+ return recursionAvailable;
+ }
+
+ /**
+ * Set the recursion available flog from this DNS message.
+ * @param recursionAvailable The new recursion available status.
+ */
+ public void setRecursionAvailable(boolean recursionAvailable) {
+ this.recursionAvailable = recursionAvailable;
+ }
+
+ /**
+ * Retrieve the authentic data flag of this message.
+ * @return The authentic data flag.
+ */
+ public boolean isAuthenticData() {
+ return authenticData;
+ }
+
+ /**
+ * Set the authentic data flag on this DNS message.
+ * @param authenticData The new authentic data flag value.
+ */
+ public void setAuthenticData(boolean authenticData) {
+ this.authenticData = authenticData;
+ }
+
+ /**
+ * Check if checks are disabled.
+ * @return The status of the CheckDisabled flag.
+ */
+ public boolean isCheckDisabled() {
+ return checkDisabled;
+ }
+
+ /**
+ * Change the check status of this packet.
+ * @param checkDisabled The new check disabled value.
+ */
+ public void setCheckDisabled(boolean checkDisabled) {
+ this.checkDisabled = checkDisabled;
+ }
+
+ /**
+ * Generate a binary dns packet out of this message.
+ * @return byte[] the binary representation.
+ * @throws IOException Should never happen.
+ */
+ public byte[] toArray() throws IOException {
+ ByteArrayOutputStream baos = new ByteArrayOutputStream(512);
+ DataOutputStream dos = new DataOutputStream(baos);
+ int header = 0;
+ if (query) {
+ header += 1 << 15;
+ }
+ if (opcode != null) {
+ header += opcode.getValue() << 11;
+ }
+ if (authoritativeAnswer) {
+ header += 1 << 10;
+ }
+ if (truncated) {
+ header += 1 << 9;
+ }
+ if (recursionDesired) {
+ header += 1 << 8;
+ }
+ if (recursionAvailable) {
+ header += 1 << 7;
+ }
+ if (authenticData) {
+ header += 1 << 5;
+ }
+ if (checkDisabled) {
+ header += 1 << 4;
+ }
+ if (responseCode != null) {
+ header += responseCode.getValue();
+ }
+ dos.writeShort((short)id);
+ dos.writeShort((short)header);
+ if (questions == null) {
+ dos.writeShort(0);
+ } else {
+ dos.writeShort((short)questions.length);
+ }
+ if (answers == null) {
+ dos.writeShort(0);
+ } else {
+ dos.writeShort((short)answers.length);
+ }
+ if (nameserverRecords == null) {
+ dos.writeShort(0);
+ } else {
+ dos.writeShort((short)nameserverRecords.length);
+ }
+ if (additionalResourceRecords == null) {
+ dos.writeShort(0);
+ } else {
+ dos.writeShort((short)additionalResourceRecords.length);
+ }
+ for (Question question: questions) {
+ dos.write(question.toByteArray());
+ }
+ dos.flush();
+ return baos.toByteArray();
+ }
+
+ /**
+ * Build a DNS Message based on a binary DNS message.
+ * @param data The DNS message data.
+ * @return Parsed DNSMessage message.
+ * @throws IOException On read errors.
+ */
+ public static DNSMessage parse(byte data[]) throws IOException {
+ ByteArrayInputStream bis = new ByteArrayInputStream(data);
+ DataInputStream dis = new DataInputStream(bis);
+ DNSMessage message = new DNSMessage();
+ message.id = dis.readUnsignedShort();
+ int header = dis.readUnsignedShort();
+ message.query = ((header >> 15) & 1) == 0;
+ message.opcode = OPCODE.getOpcode((header >> 11) & 0xf);
+ message.authoritativeAnswer = ((header >> 10) & 1) == 1;
+ message.truncated = ((header >> 9) & 1) == 1;
+ message.recursionDesired = ((header >> 8) & 1) == 1;
+ message.recursionAvailable = ((header >> 7) & 1) == 1;
+ message.authenticData = ((header >> 5) & 1) == 1;
+ message.checkDisabled = ((header >> 4) & 1) == 1;
+ message.responseCode = RESPONSE_CODE.getResponseCode(header & 0xf);
+ message.receiveTimestamp = System.currentTimeMillis();
+ int questionCount = dis.readUnsignedShort();
+ int answerCount = dis.readUnsignedShort();
+ int nameserverCount = dis.readUnsignedShort();
+ int additionalResourceRecordCount = dis.readUnsignedShort();
+ message.questions = new Question[questionCount];
+ while (questionCount-- > 0) {
+ Question q = Question.parse(dis, data);
+ message.questions[questionCount] = q;
+ }
+ message.answers = new Record[answerCount];
+ while (answerCount-- > 0) {
+ Record rr = new Record();
+ rr.parse(dis, data);
+ message.answers[answerCount] = rr;
+ }
+ message.nameserverRecords = new Record[nameserverCount];
+ while (nameserverCount-- > 0) {
+ Record rr = new Record();
+ rr.parse(dis, data);
+ message.nameserverRecords[nameserverCount] = rr;
+ }
+ message.additionalResourceRecords =
+ new Record[additionalResourceRecordCount];
+ while (additionalResourceRecordCount-- > 0) {
+ Record rr = new Record();
+ rr.parse(dis, data);
+ message.additionalResourceRecords[additionalResourceRecordCount] =
+ rr;
+ }
+ return message;
+ }
+
+ /**
+ * Set the question part of this message.
+ * @param questions The questions.
+ */
+ public void setQuestions(Question ... questions) {
+ this.questions = questions;
+ }
+
+ /**
+ * Retrieve the opcode of this message.
+ * @return The opcode of this message.
+ */
+ public OPCODE getOpcode() {
+ return opcode;
+ }
+
+ /**
+ * Retrieve the response code of this message.
+ * @return The response code.
+ */
+ public RESPONSE_CODE getResponseCode() {
+ return responseCode;
+ }
+
+ /**
+ * Retrieve the question section of this message.
+ * @return The DNS question section.
+ */
+ public Question[] getQuestions() {
+ return questions;
+ }
+
+ /**
+ * Retrieve the answer records of this DNS message.
+ * @return The answer section of this DNS message.
+ */
+ public Record[] getAnswers() {
+ return answers;
+ }
+
+ /**
+ * Retrieve the nameserver records of this DNS message.
+ * @return The nameserver section of this DNS message.
+ */
+ public Record[] getNameserverRecords() {
+ return nameserverRecords;
+ }
+
+ /**
+ * Retrieve the additional resource records attached to this DNS message.
+ * @return The additional resource record section of this DNS message.
+ */
+ public Record[] getAdditionalResourceRecords() {
+ return additionalResourceRecords;
+ }
+
+ public String toString() {
+ return "-- DNSMessage " + id + " --\n" +
+ "Q" + Arrays.toString(questions) +
+ "NS" + Arrays.toString(nameserverRecords) +
+ "A" + Arrays.toString(answers) +
+ "ARR" + Arrays.toString(additionalResourceRecords);
+ }
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/LRUCache.java b/libs/minidns/src/main/java/de/measite/minidns/LRUCache.java
new file mode 100644
index 00000000..6b9bbdc1
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/LRUCache.java
@@ -0,0 +1,139 @@
+package de.measite.minidns;
+
+import java.util.LinkedHashMap;
+import java.util.Map.Entry;
+
+/**
+ * LRU based DNSCache backed by a LinkedHashMap.
+ */
+public class LRUCache implements DNSCache {
+
+ /**
+ * Internal miss count.
+ */
+ protected long missCount = 0l;
+
+ /**
+ * Internal expire count (subset of misses that was caused by expire).
+ */
+ protected long expireCount = 0l;
+
+ /**
+ * Internal hit count.
+ */
+ protected long hitCount = 0l;
+
+ /**
+ * The internal capacity of the backend cache.
+ */
+ protected int capacity;
+
+ /**
+ * The upper bound of the ttl. All longer TTLs will be capped by this ttl.
+ */
+ protected long maxTTL;
+
+ /**
+ * The backend cache.
+ */
+ protected LinkedHashMap<Question, DNSMessage> backend;
+
+ /**
+ * Create a new LRUCache with given capacity and upper bound ttl.
+ * @param capacity The internal capacity.
+ * @param maxTTL The upper bound for any ttl.
+ */
+ @SuppressWarnings("serial")
+ public LRUCache(final int capacity, final long maxTTL) {
+ this.capacity = capacity;
+ this.maxTTL = maxTTL;
+ backend = new LinkedHashMap<Question,DNSMessage>(
+ Math.min(capacity + (capacity + 3) / 4 + 2, 11), 0.75f, true)
+ {
+ @Override
+ protected boolean removeEldestEntry(
+ Entry<Question, DNSMessage> eldest) {
+ return size() > capacity;
+ }
+ };
+ }
+
+ /**
+ * Create a new LRUCache with given capacity.
+ * @param capacity The capacity of this cache.
+ */
+ public LRUCache(final int capacity) {
+ this(capacity, Long.MAX_VALUE);
+ }
+
+ @Override
+ public synchronized void put(Question q, DNSMessage message) {
+ if (message.getReceiveTimestamp() <= 0l) {
+ return;
+ }
+ backend.put(q, message);
+ }
+
+ @Override
+ public synchronized DNSMessage get(Question q) {
+ DNSMessage message = backend.get(q);
+ if (message == null) {
+ missCount++;
+ return null;
+ }
+
+ long ttl = maxTTL;
+ for (Record r : message.getAnswers()) {
+ ttl = Math.min(ttl, r.ttl);
+ }
+ for (Record r : message.getAdditionalResourceRecords()) {
+ ttl = Math.min(ttl, r.ttl);
+ }
+ if (message.getReceiveTimestamp() + ttl > System.currentTimeMillis()) {
+ missCount++;
+ expireCount++;
+ backend.remove(q);
+ return null;
+ } else {
+ hitCount++;
+ return message;
+ }
+ }
+
+ /**
+ * Clear all entries in this cache.
+ */
+ public synchronized void clear() {
+ backend.clear();
+ missCount = 0l;
+ hitCount = 0l;
+ expireCount = 0l;
+ }
+
+ /**
+ * Get the miss count of this cache which is the number of fruitless
+ * get calls since this cache was last resetted.
+ * @return The number of cache misses.
+ */
+ public long getMissCount() {
+ return missCount;
+ }
+
+ /**
+ * The number of expires (cache hits that have had a ttl to low to be
+ * retrieved).
+ * @return The expire count.
+ */
+ public long getExpireCount() {
+ return expireCount;
+ }
+
+ /**
+ * The cache hit count (all sucessful calls to get).
+ * @return The hit count.
+ */
+ public long getHitCount() {
+ return hitCount;
+ }
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/Question.java b/libs/minidns/src/main/java/de/measite/minidns/Question.java
new file mode 100644
index 00000000..3b2fa1a1
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/Question.java
@@ -0,0 +1,158 @@
+package de.measite.minidns;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.Arrays;
+
+import de.measite.minidns.Record.CLASS;
+import de.measite.minidns.Record.TYPE;
+import de.measite.minidns.util.NameUtil;
+
+/**
+ * A DNS question (request).
+ */
+public class Question {
+
+ /**
+ * The question string (e.g. "measite.de").
+ */
+ private final String name;
+
+ /**
+ * The question type (e.g. A).
+ */
+ private final TYPE type;
+
+ /**
+ * The question class (usually IN / internet).
+ */
+ private final CLASS clazz;
+
+ /**
+ * UnicastQueries have the highest bit of the CLASS field set to 1.
+ */
+ private final boolean unicastQuery;
+
+ /**
+ * Cache for the serialized object.
+ */
+ private byte[] byteArray;
+
+ /**
+ * Create a dns question for the given name/type/class.
+ * @param name The name e.g. "measite.de".
+ * @param type The type, e.g. A.
+ * @param clazz The class, usually IN (internet).
+ */
+ public Question(String name, TYPE type, CLASS clazz, boolean unicastQuery) {
+ this.name = name;
+ this.type = type;
+ this.clazz = clazz;
+ this.unicastQuery = unicastQuery;
+ }
+
+ /**
+ * Create a dns question for the given name/type/class.
+ * @param name The name e.g. "measite.de".
+ * @param type The type, e.g. A.
+ * @param clazz The class, usually IN (internet).
+ */
+ public Question(String name, TYPE type, CLASS clazz) {
+ this(name, type, clazz, false);
+ }
+
+ /**
+ * Create a dns question for the given name/type/IN (internet class).
+ * @param name The name e.g. "measite.de".
+ * @param type The type, e.g. A.
+ */
+ public Question(String name, TYPE type) {
+ this(name, type, CLASS.IN);
+ }
+
+ /**
+ * Retrieve the type of this question.
+ * @return The type.
+ */
+ public TYPE getType() {
+ return type;
+ }
+
+ /**
+ * Retrieve the class of this dns question (usually internet).
+ * @return The class of this dns question.
+ */
+ public CLASS getClazz() {
+ return clazz;
+ }
+
+ /**
+ * Retrieve the name of this dns question (e.g. "measite.de").
+ * @return The name of this dns question.
+ */
+ public String getName() {
+ return name;
+ }
+
+ /**
+ * Parse a byte array and rebuild the dns question from it.
+ * @param dis The input stream.
+ * @param data The plain data (for dns name references).
+ * @return The parsed dns question.
+ * @throws IOException On errors (read outside of packet).
+ */
+ public static Question parse(DataInputStream dis, byte[] data) throws IOException {
+ String name = NameUtil.parse(dis, data);
+ TYPE type = TYPE.getType(dis.readUnsignedShort());
+ CLASS clazz = CLASS.getClass(dis.readUnsignedShort());
+ return new Question (name, type, clazz);
+ }
+
+ /**
+ * Generate a binary paket for this dns question.
+ * @return The dns question.
+ */
+ public byte[] toByteArray() {
+ if (byteArray == null) {
+ ByteArrayOutputStream baos = new ByteArrayOutputStream(512);
+ DataOutputStream dos = new DataOutputStream(baos);
+
+ try {
+ dos.write(NameUtil.toByteArray(this.name));
+ dos.writeShort(type.getValue());
+ dos.writeShort(clazz.getValue() | (unicastQuery ? (1 << 15) : 0));
+ dos.flush();
+ } catch (IOException e) {
+ // Should never happen
+ throw new IllegalStateException(e);
+ }
+ byteArray = baos.toByteArray();
+ }
+ return byteArray;
+ }
+
+ @Override
+ public int hashCode() {
+ return Arrays.hashCode(toByteArray());
+ }
+
+ @Override
+ public boolean equals(Object other) {
+ if (this == other) {
+ return true;
+ }
+ if (!(other instanceof Question)) {
+ return false;
+ }
+ byte t[] = toByteArray();
+ byte o[] = ((Question)other).toByteArray();
+ return Arrays.equals(t, o);
+ }
+
+ @Override
+ public String toString() {
+ return "Question/" + clazz + "/" + type + ": " + name;
+ }
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/Record.java b/libs/minidns/src/main/java/de/measite/minidns/Record.java
new file mode 100644
index 00000000..ab081426
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/Record.java
@@ -0,0 +1,343 @@
+package de.measite.minidns;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import de.measite.minidns.record.A;
+import de.measite.minidns.record.AAAA;
+import de.measite.minidns.record.CNAME;
+import de.measite.minidns.record.Data;
+import de.measite.minidns.record.NS;
+import de.measite.minidns.record.PTR;
+import de.measite.minidns.record.SRV;
+import de.measite.minidns.record.TXT;
+import de.measite.minidns.util.NameUtil;
+
+/**
+ * A generic DNS record.
+ */
+public class Record {
+
+ private static final Logger LOGGER = Logger.getLogger(Client.class.getName());
+
+ /**
+ * The record type.
+ * @see <a href="http://www.iana.org/assignments/dns-parameters">IANA DNS Parameters</a>
+ */
+ public static enum TYPE {
+ A(1),
+ NS(2),
+ MD(3),
+ MF(4),
+ CNAME(5),
+ SOA(6),
+ MB(7),
+ MG(8),
+ MR(9),
+ NULL(10),
+ WKS(11),
+ PTR(12),
+ HINFO(13),
+ MINFO(14),
+ MX(15),
+ TXT(16),
+ RP(17),
+ AFSDB(18),
+ X25(19),
+ ISDN(20),
+ RT(21),
+ NSAP(22),
+ NSAP_PTR(23),
+ SIG(24),
+ KEY(25),
+ PX(26),
+ GPOS(27),
+ AAAA(28),
+ LOC(29),
+ NXT(30),
+ EID(31),
+ NIMLOC(32),
+ SRV(33),
+ ATMA(34),
+ NAPTR(35),
+ KX(36),
+ CERT(37),
+ A6(38),
+ DNAME(39),
+ SINK(40),
+ OPT(41),
+ APL(42),
+ DS(43),
+ SSHFP(44),
+ IPSECKEY(45),
+ RRSIG(46),
+ NSEC(47),
+ DNSKEY(48),
+ DHCID(49),
+ NSEC3(50),
+ NSEC3PARAM(51),
+ HIP(55),
+ NINFO(56),
+ RKEY(57),
+ TALINK(58),
+ SPF(99),
+ UINFO(100),
+ UID(101),
+ GID(102),
+ TKEY(249),
+ TSIG(250),
+ IXFR(251),
+ AXFR(252),
+ MAILB(253),
+ MAILA(254),
+ ANY(255),
+ TA(32768),
+ DLV(32769);
+
+ /**
+ * The value of this DNS record type.
+ */
+ private final int value;
+
+ /**
+ * Internal lookup table to map values to types.
+ */
+ private final static HashMap<Integer, TYPE> INVERSE_LUT =
+ new HashMap<Integer, TYPE>();
+
+ /**
+ * Initialize the reverse lookup table.
+ */
+ static {
+ for(TYPE t: TYPE.values()) {
+ INVERSE_LUT.put(t.getValue(), t);
+ }
+ }
+
+ /**
+ * Create a new record type.
+ * @param value The binary value of this type.
+ */
+ private TYPE(int value) {
+ this.value = value;
+ }
+
+ /**
+ * Retrieve the binary value of this type.
+ * @return The binary value.
+ */
+ public int getValue() {
+ return value;
+ }
+
+ /**
+ * Retrieve the symbolic type of the binary value.
+ * @param value The binary type value.
+ * @return The symbolic tpye.
+ */
+ public static TYPE getType(int value) {
+ return INVERSE_LUT.get(value);
+ }
+ };
+
+ /**
+ * The symbolic class of a DNS record (usually IN for Internet).
+ */
+ public static enum CLASS {
+ IN(1),
+ CH(3),
+ HS(4),
+ NONE(254),
+ ANY(255);
+
+ /**
+ * Internal reverse lookup table to map binary class values to symbolic
+ * names.
+ */
+ private final static HashMap<Integer, CLASS> INVERSE_LUT =
+ new HashMap<Integer, CLASS>();
+
+ /**
+ * Initialize the interal reverse lookup table.
+ */
+ static {
+ for(CLASS c: CLASS.values()) {
+ INVERSE_LUT.put(c.getValue(), c);
+ }
+ }
+
+ /**
+ * The binary value of this dns class.
+ */
+ private final int value;
+
+ /**
+ * Create a new DNS class based on a binary value.
+ * @param value The binary value of this DNS class.
+ */
+ private CLASS(int value) {
+ this.value = value;
+ }
+
+ /**
+ * Retrieve the binary value of this DNS class.
+ * @return The binary value of this DNS class.
+ */
+ public int getValue() {
+ return value;
+ }
+
+ /**
+ * Retrieve the symbolic DNS class for a binary class value.
+ * @param value The binary DNS class value.
+ * @return The symbolic class instance.
+ */
+ public static CLASS getClass(int value) {
+ return INVERSE_LUT.get(value);
+ }
+
+ }
+
+ /**
+ * The generic name of this record.
+ */
+ protected String name;
+
+ /**
+ * The type (and payload type) of this record.
+ */
+ protected TYPE type;
+
+ /**
+ * The record class (usually CLASS.IN).
+ */
+ protected CLASS clazz;
+
+ /**
+ * The ttl of this record.
+ */
+ protected long ttl;
+
+ /**
+ * The payload object of this record.
+ */
+ protected Data payloadData;
+
+ /**
+ * MDNS defines the highest bit of the class as the unicast query bit.
+ */
+ protected boolean unicastQuery;
+
+ /**
+ * Parse a given record based on the full message data and the current
+ * stream position.
+ * @param dis The DataInputStream positioned at the first record byte.
+ * @param data The full message data.
+ * @throws IOException In case of malformed replies.
+ */
+ public void parse(DataInputStream dis, byte[] data) throws IOException {
+ this.name = NameUtil.parse(dis, data);
+ this.type = TYPE.getType(dis.readUnsignedShort());
+ int clazzValue = dis.readUnsignedShort();
+ this.clazz = CLASS.getClass(clazzValue & 0x7fff);
+ this.unicastQuery = (clazzValue & 0x8000) > 0;
+ if (this.clazz == null) {
+ LOGGER.log(Level.FINE, "Unknown class " + clazzValue);
+ }
+ this.ttl = (((long)dis.readUnsignedShort()) << 32) +
+ dis.readUnsignedShort();
+ int payloadLength = dis.readUnsignedShort();
+ switch (this.type) {
+ case SRV:
+ this.payloadData = new SRV();
+ break;
+ case AAAA:
+ this.payloadData = new AAAA();
+ break;
+ case A:
+ this.payloadData = new A();
+ break;
+ case NS:
+ this.payloadData = new NS();
+ break;
+ case CNAME:
+ this.payloadData = new CNAME();
+ break;
+ case PTR:
+ this.payloadData = new PTR();
+ break;
+ case TXT:
+ this.payloadData = new TXT();
+ break;
+ default:
+ LOGGER.log(Level.FINE, "Unparsed type " + type);
+ this.payloadData = null;
+ for (int i = 0; i < payloadLength; i++) {
+ dis.readByte();
+ }
+ break;
+ }
+ if (this.payloadData != null) {
+ this.payloadData.parse(dis, data, payloadLength);
+ }
+ }
+
+ /**
+ * Retrieve a textual representation of this resource record.
+ * @return String
+ */
+ @Override
+ public String toString() {
+ if (payloadData == null) {
+ return "RR " + type + "/" + clazz;
+ }
+ return "RR " + type + "/" + clazz + ": " + payloadData.toString();
+ };
+
+ /**
+ * Check if this record answers a given query.
+ * @param q The query.
+ * @return True if this record is a valid answer.
+ */
+ public boolean isAnswer(Question q) {
+ return ((q.getType() == type) || (q.getType() == TYPE.ANY)) &&
+ ((q.getClazz() == clazz) || (q.getClazz() == CLASS.ANY)) &&
+ (q.getName().equals(name));
+ }
+
+ /**
+ * See if this query/response was a unicast query (highest class bit set).
+ * @return True if it is a unicast query/response record.
+ */
+ public boolean isUnicastQuery() {
+ return unicastQuery;
+ }
+
+ /**
+ * The generic record name, e.g. "measite.de".
+ * @return The record name.
+ */
+ public String getName() {
+ return name;
+ }
+
+ /**
+ * The payload data, usually a subclass of data (A, AAAA, CNAME, ...).
+ * @return The payload data.
+ */
+ public Data getPayload() {
+ return payloadData;
+ }
+
+ /**
+ * Retrieve the record ttl.
+ * @return The record ttl.
+ */
+ public long getTtl() {
+ return ttl;
+ }
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/record/A.java b/libs/minidns/src/main/java/de/measite/minidns/record/A.java
new file mode 100644
index 00000000..4311c651
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/record/A.java
@@ -0,0 +1,43 @@
+package de.measite.minidns.record;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+
+import de.measite.minidns.Record.TYPE;
+
+/**
+ * A record payload (ip pointer).
+ */
+public class A implements Data {
+
+ /**
+ * Target IP.
+ */
+ private byte[] ip;
+
+ @Override
+ public TYPE getType() {
+ return TYPE.A;
+ }
+
+ @Override
+ public byte[] toByteArray() {
+ return ip;
+ }
+
+ @Override
+ public void parse(DataInputStream dis, byte[] data, int length)
+ throws IOException {
+ ip = new byte[4];
+ dis.readFully(ip);
+ }
+
+ @Override
+ public String toString() {
+ return Integer.toString(ip[0] & 0xff) + "." +
+ Integer.toString(ip[1] & 0xff) + "." +
+ Integer.toString(ip[2] & 0xff) + "." +
+ Integer.toString(ip[3] & 0xff);
+ }
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/record/AAAA.java b/libs/minidns/src/main/java/de/measite/minidns/record/AAAA.java
new file mode 100644
index 00000000..e4fd5ecf
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/record/AAAA.java
@@ -0,0 +1,49 @@
+package de.measite.minidns.record;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+
+import de.measite.minidns.Record.TYPE;
+
+/**
+ * AAAA payload (an ipv6 pointer).
+ */
+public class AAAA implements Data {
+
+ /**
+ * The ipv6 address.
+ */
+ private byte[] ip;
+
+ @Override
+ public TYPE getType() {
+ return TYPE.AAAA;
+ }
+
+ @Override
+ public byte[] toByteArray() {
+ return ip;
+ }
+
+ @Override
+ public void parse(DataInputStream dis, byte[] data, int length)
+ throws IOException {
+ ip = new byte[16];
+ dis.readFully(ip);
+ }
+
+ @Override
+ public String toString() {
+ StringBuilder sb = new StringBuilder();
+ for (int i = 0; i < ip.length; i += 2) {
+ if (i != 0) {
+ sb.append(':');
+ }
+ sb.append(Integer.toHexString(
+ ((ip[i] & 0xff) << 8) + (ip[i + 1] & 0xff)
+ ));
+ }
+ return sb.toString();
+ }
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/record/CNAME.java b/libs/minidns/src/main/java/de/measite/minidns/record/CNAME.java
new file mode 100644
index 00000000..1ac27814
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/record/CNAME.java
@@ -0,0 +1,46 @@
+package de.measite.minidns.record;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+
+import de.measite.minidns.Record.TYPE;
+import de.measite.minidns.util.NameUtil;
+
+/**
+ * CNAME payload (pointer to another domain / address).
+ */
+public class CNAME implements Data {
+
+ protected String name;
+
+ public String getName() {
+ return name;
+ }
+
+ public void setName(String name) {
+ this.name = name;
+ }
+
+ @Override
+ public byte[] toByteArray() {
+ throw new UnsupportedOperationException("Not implemented yet");
+ }
+
+ @Override
+ public void parse(DataInputStream dis, byte[] data, int length)
+ throws IOException
+ {
+ this.name = NameUtil.parse(dis, data);
+ }
+
+ @Override
+ public TYPE getType() {
+ return TYPE.CNAME;
+ }
+
+ @Override
+ public String toString() {
+ return "to \"" + name + "\"";
+ }
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/record/Data.java b/libs/minidns/src/main/java/de/measite/minidns/record/Data.java
new file mode 100644
index 00000000..7f2db03a
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/record/Data.java
@@ -0,0 +1,34 @@
+package de.measite.minidns.record;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+
+import de.measite.minidns.Record.TYPE;
+
+/**
+ * Generic payload class.
+ */
+public interface Data {
+
+ /**
+ * The payload type.
+ * @return The payload type.
+ */
+ TYPE getType();
+
+ /**
+ * Binary representation of this payload.
+ * @return The binary representation of this payload.
+ */
+ byte[] toByteArray();
+
+ /**
+ * Parse this payload.
+ * @param dis The input stream.
+ * @param data The plain data (needed for name cross references).
+ * @param length The payload length.
+ * @throws IOException on io error (read past paket boundary).
+ */
+ void parse(DataInputStream dis, byte data[], int length) throws IOException;
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/record/NS.java b/libs/minidns/src/main/java/de/measite/minidns/record/NS.java
new file mode 100644
index 00000000..8ac2d4c3
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/record/NS.java
@@ -0,0 +1,15 @@
+package de.measite.minidns.record;
+
+import de.measite.minidns.Record.TYPE;
+
+/**
+ * Nameserver record.
+ */
+public class NS extends CNAME {
+
+ @Override
+ public TYPE getType() {
+ return TYPE.NS;
+ }
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/record/PTR.java b/libs/minidns/src/main/java/de/measite/minidns/record/PTR.java
new file mode 100644
index 00000000..6e200655
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/record/PTR.java
@@ -0,0 +1,19 @@
+package de.measite.minidns.record;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+
+import de.measite.minidns.Record.TYPE;
+import de.measite.minidns.util.NameUtil;
+
+/**
+ * A PTR record is handled like a CNAME
+ */
+public class PTR extends CNAME {
+
+ @Override
+ public TYPE getType() {
+ return TYPE.PTR;
+ }
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/record/SRV.java b/libs/minidns/src/main/java/de/measite/minidns/record/SRV.java
new file mode 100644
index 00000000..707bf3f5
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/record/SRV.java
@@ -0,0 +1,124 @@
+package de.measite.minidns.record;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+
+import de.measite.minidns.Record.TYPE;
+import de.measite.minidns.util.NameUtil;
+
+/**
+ * SRV record payload (service pointer).
+ */
+public class SRV implements Data {
+
+ /**
+ * The priority of this service.
+ */
+ protected int priority;
+
+ /**
+ * The weight of this service.
+ */
+ protected int weight;
+
+ /**
+ * The target port.
+ */
+ protected int port;
+
+ /**
+ * The target server.
+ */
+ protected String name;
+
+ /**
+ * The priority of this service. Lower values mean higher priority.
+ * @return The priority.
+ */
+ public int getPriority() {
+ return priority;
+ }
+
+ /**
+ * Set the priority of this service entry. Lower values have higher priority.
+ * @param priority The new priority.
+ */
+ public void setPriority(int priority) {
+ this.priority = priority;
+ }
+
+ /**
+ * The weight of this service. Services with the same priority should be
+ * balanced based on weight.
+ * @return The weight of this service.
+ */
+ public int getWeight() {
+ return weight;
+ }
+
+ /**
+ * Set the weight of this service.
+ * @param weight The new weight of this service.
+ */
+ public void setWeight(int weight) {
+ this.weight = weight;
+ }
+
+ /**
+ * The target port of this service.
+ * @return The target port of this service.
+ */
+ public int getPort() {
+ return port;
+ }
+
+ /**
+ * Set the target port of this service.
+ * @param port The new target port.
+ */
+ public void setPort(int port) {
+ this.port = port;
+ }
+
+ /**
+ * The name of the target server.
+ * @return The target servers name.
+ */
+ public String getName() {
+ return name;
+ }
+
+ /**
+ * Set the name of the target server.
+ * @param name The new target servers name.
+ */
+ public void setName(String name) {
+ this.name = name;
+ }
+
+ @Override
+ public byte[] toByteArray() {
+ throw new UnsupportedOperationException("Not implemented yet");
+ }
+
+ @Override
+ public void parse(DataInputStream dis, byte[] data, int length)
+ throws IOException
+ {
+ this.priority = dis.readUnsignedShort();
+ this.weight = dis.readUnsignedShort();
+ this.port = dis.readUnsignedShort();
+ this.name = NameUtil.parse(dis, data);
+ }
+
+ @Override
+ public String toString() {
+ return "SRV " + name + ":" + port + " p:" + priority + " w:" + weight;
+ }
+
+ @Override
+ public TYPE getType() {
+ return TYPE.SRV;
+ }
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/record/TXT.java b/libs/minidns/src/main/java/de/measite/minidns/record/TXT.java
new file mode 100644
index 00000000..03e73040
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/record/TXT.java
@@ -0,0 +1,65 @@
+package de.measite.minidns.record;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+
+import de.measite.minidns.Record.TYPE;
+import de.measite.minidns.util.NameUtil;
+
+/**
+ * TXT record (actually a binary blob with wrappers for text content).
+ */
+public class TXT implements Data {
+
+ protected byte[] blob;
+
+ public byte[] getBlob() {
+ return blob;
+ }
+
+ public void setBlob(byte[] blob) {
+ this.blob = blob;
+ }
+
+ public String getText() {
+ try {
+ return (new String(blob, "UTF-8")).intern();
+ } catch (Exception e) {
+ /* Can't happen for UTF-8 unless it's really a blob */
+ return null;
+ }
+ }
+
+ public void setText(String text) {
+ try {
+ this.blob = text.getBytes("UTF-8");
+ } catch (Exception e) {
+ /* Can't happen, UTF-8 IS supported */
+ throw new RuntimeException("UTF-8 not supported", e);
+ }
+ }
+
+ @Override
+ public byte[] toByteArray() {
+ throw new UnsupportedOperationException("Not implemented yet");
+ }
+
+ @Override
+ public void parse(DataInputStream dis, byte[] data, int length)
+ throws IOException
+ {
+ blob = new byte[length];
+ dis.readFully(blob);
+ }
+
+ @Override
+ public TYPE getType() {
+ return TYPE.TXT;
+ }
+
+ @Override
+ public String toString() {
+ return "\"" + getText() + "\"";
+ }
+
+}
diff --git a/libs/minidns/src/main/java/de/measite/minidns/util/NameUtil.java b/libs/minidns/src/main/java/de/measite/minidns/util/NameUtil.java
new file mode 100644
index 00000000..7ae373bc
--- /dev/null
+++ b/libs/minidns/src/main/java/de/measite/minidns/util/NameUtil.java
@@ -0,0 +1,129 @@
+package de.measite.minidns.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.net.IDN;
+import java.util.HashSet;
+import java.util.Arrays;
+
+/**
+ * Utilities related to internationalized domain names and dns name handling.
+ */
+public class NameUtil {
+
+ /**
+ * Retrieve the rough binary length of a string
+ * (length + 2 bytes length prefix).
+ * @param name The name string.
+ * @return The binary size of the string (length + 2).
+ */
+ public static int size(String name) {
+ return name.length() + 2;
+ }
+
+ /**
+ * Check if two internationalized domain names are equal, possibly causing
+ * a serialization of both domain names.
+ * @param name1 The first domain name.
+ * @param name2 The second domain name.
+ * @return True if both domain names are the same.
+ */
+ public static boolean idnEquals(String name1, String name2) {
+ if (name1 == name2) return true; // catches null, null
+ if (name1 == null) return false;
+ if (name2 == null) return false;
+ if (name1.equals(name2)) return true;
+
+ try {
+ return Arrays.equals(toByteArray(name1),toByteArray(name2));
+ } catch (IOException e) {
+ return false; // impossible
+ }
+ }
+
+ /**
+ * Serialize a domain name under IDN rules.
+ * @param name The domain name.
+ * @return The binary domain name representation.
+ * @throws IOException Should never happen.
+ */
+ public static byte[] toByteArray(String name) throws IOException {
+ ByteArrayOutputStream baos = new ByteArrayOutputStream(64);
+ DataOutputStream dos = new DataOutputStream(baos);
+ for (String s: name.split("[.\u3002\uFF0E\uFF61]")) {
+ byte[] buffer = IDN.toASCII(s).getBytes();
+ dos.writeByte(buffer.length);
+ dos.write(buffer);
+ }
+ dos.writeByte(0);
+ dos.flush();
+ return baos.toByteArray();
+ }
+
+ /**
+ * Parse a domain name starting at the current offset and moving the input
+ * stream pointer past this domain name (even if cross references occure).
+ * @param dis The input stream.
+ * @param data The raw data (for cross references).
+ * @return The domain name string.
+ * @throws IOException Should never happen.
+ */
+ public static String parse(DataInputStream dis, byte data[])
+ throws IOException
+ {
+ int c = dis.readUnsignedByte();
+ if ((c & 0xc0) == 0xc0) {
+ c = ((c & 0x3f) << 8) + dis.readUnsignedByte();
+ HashSet<Integer> jumps = new HashSet<Integer>();
+ jumps.add(c);
+ return parse(data, c, jumps);
+ }
+ if (c == 0) {
+ return "";
+ }
+ byte b[] = new byte[c];
+ dis.readFully(b);
+ String s = IDN.toUnicode(new String(b));
+ String t = parse(dis, data);
+ if (t.length() > 0) {
+ s = s + "." + t;
+ }
+ return s;
+ }
+
+ /**
+ * Parse a domain name starting at the given offset.
+ * @param data The raw data.
+ * @param offset The offset.
+ * @param jumps The list of jumps (by now).
+ * @return The parsed domain name.
+ * @throws IllegalStateException on cycles.
+ */
+ public static String parse(
+ byte data[],
+ int offset,
+ HashSet<Integer> jumps
+ ) {
+ int c = data[offset] & 0xff;
+ if ((c & 0xc0) == 0xc0) {
+ c = ((c & 0x3f) << 8) + (data[offset + 1] & 0xff);
+ if (jumps.contains(c)) {
+ throw new IllegalStateException("Cyclic offsets detected.");
+ }
+ jumps.add(c);
+ return parse(data, c, jumps);
+ }
+ if (c == 0) {
+ return "";
+ }
+ String s = new String(data,offset + 1, c);
+ String t = parse(data, offset + 1 + c, jumps);
+ if (t.length() > 0) {
+ s = s + "." + t;
+ }
+ return s;
+ }
+
+}