sum7/Conversations
sum7
/
Conversations
1
1
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Subtree merged in minidns

This commit is contained in:
Sam Whited 2014-10-28 12:14:21 -04:00
parent ccba01ef19
commit 4a1bae3a69
23 changed files with 2945 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

107
libs/minidns/.gitignore vendored Normal file
View File

@ -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

4
libs/minidns/LICENCE Normal file
View File

@ -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)

178
libs/minidns/LICENCE_APACHE Normal file
View File

@ -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

503
libs/minidns/LICENCE_LGPL2.1 Normal file
View File

@ -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!

13
libs/minidns/LICENCE_WTFPL Normal file
View File

@ -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.

8
libs/minidns/README.md Normal file
View File

@ -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.

77
libs/minidns/build.gradle Normal file
View File

@ -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 {
}

21
libs/minidns/gradle.properties.example Normal file
View File

@ -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

323
libs/minidns/src/main/java/de/measite/minidns/Client.java Normal file
View File

@ -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;
}
}

23
libs/minidns/src/main/java/de/measite/minidns/DNSCache.java Normal file
View File

@ -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);
}

524
libs/minidns/src/main/java/de/measite/minidns/DNSMessage.java Normal file
View File

@ -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);
}
}

139
libs/minidns/src/main/java/de/measite/minidns/LRUCache.java Normal file
View File

@ -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;
}
}

158
libs/minidns/src/main/java/de/measite/minidns/Question.java Normal file
View File

@ -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;
}
}

343
libs/minidns/src/main/java/de/measite/minidns/Record.java Normal file
View File

@ -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;
}
}

43
libs/minidns/src/main/java/de/measite/minidns/record/A.java Normal file
View File

@ -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);
}
}

49
libs/minidns/src/main/java/de/measite/minidns/record/AAAA.java Normal file
View File

@ -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();
}
}

46
libs/minidns/src/main/java/de/measite/minidns/record/CNAME.java Normal file
View File

@ -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 + "\"";
}
}

34
libs/minidns/src/main/java/de/measite/minidns/record/Data.java Normal file
View File

@ -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;
}

15
libs/minidns/src/main/java/de/measite/minidns/record/NS.java Normal file
View File

@ -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;
}
}

19
libs/minidns/src/main/java/de/measite/minidns/record/PTR.java Normal file
View File

@ -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;
}
}

124
libs/minidns/src/main/java/de/measite/minidns/record/SRV.java Normal file
View File

@ -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;
}
}

65
libs/minidns/src/main/java/de/measite/minidns/record/TXT.java Normal file
View File

@ -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() + "\"";
}
}

129
libs/minidns/src/main/java/de/measite/minidns/util/NameUtil.java Normal file
View File

@ -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;
}
}