perlgpl.1

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

\&    whole or in part contains or is derived from the Program or any
\&    part thereof, to be licensed as a whole at no charge to all third
\&    parties under the terms of this License.
\&
\&    c) If the modified program normally reads commands interactively
\&    when run, you must cause it, when started running for such
\&    interactive use in the most ordinary way, to print or display an
\&    announcement including an appropriate copyright notice and a
\&    notice that there is no warranty (or else, saying that you provide
\&    a warranty) and that users may redistribute the program under
\&    these conditions, and telling the user how to view a copy of this
\&    License.  (Exception: if the Program itself is interactive but
\&    does not normally print such an announcement, your work based on
\&    the Program is not required to print an announcement.)
.Ve
.PP
These requirements apply to the modified work as a whole.  If
identifiable sections of that work are not derived from the Program,
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 Program, 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.
.PP
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 Program.
.PP
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
.PP
.Vb 3
\&  3. You may copy and distribute the Program (or a work based on it,
\&under Section 2) in object code or executable form under the terms of
\&Sections 1 and 2 above provided that you also do one of the following:
\&
\&    a) 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; or,
\&
\&    b) Accompany it with a written offer, valid for at least three
\&    years, to give any third party, for a charge no more than your
\&    cost of physically performing source distribution, a complete
\&    machine\-readable copy of the corresponding source code, to be
\&    distributed under the terms of Sections 1 and 2 above on a medium
\&    customarily used for software interchange; or,
\&
\&    c) Accompany it with the information you received as to the offer
\&    to distribute corresponding source code.  (This alternative is
\&    allowed only for noncommercial distribution and only if you
\&    received the program in object code or executable form with such
\&    an offer, in accord with Subsection b above.)
.Ve
.PP
The source code for a work means the preferred form of the work for
making modifications to it.  For an executable work, 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 executable.  However, as a
special exception, the source code 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.
.PP
If distribution of executable or 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 counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.
.PP
.Vb 7
\&  4. You may not copy, modify, sublicense, or distribute the Program
\&except as expressly provided under this License.  Any attempt
\&otherwise to copy, modify, sublicense or distribute the Program 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.
\&
\&  5. 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 Program or its derivative works.  These actions are
\&prohibited by law if you do not accept this License.  Therefore, by
\&modifying or distributing the Program (or any work based on the
\&Program), you indicate your acceptance of this License to do so, and
\&all its terms and conditions for copying, distributing or modifying
\&the Program or works based on it.
\&
\&  6. Each time you redistribute the Program (or any work based on the
\&Program), the recipient automatically receives a license from the
\&original licensor to copy, distribute or modify the Program subject to
\&these terms and conditions.  You may not impose any further
\&restrictions on the recipients\*(Aq exercise of the rights granted herein.
\&You are not responsible for enforcing compliance by third parties to
\&this License.
\&
\&  7. 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 Program at all.  For example, if a patent
\&license would not permit royalty\-free redistribution of the Program 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 Program.
.Ve
.PP
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.
.PP
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.
.PP
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
.PP
.Vb 7
\&  8. If the distribution and/or use of the Program is restricted in
\&certain countries either by patents or by copyrighted interfaces, the
\&original copyright holder who places the Program 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.
\&
\&  9. The Free Software Foundation may publish revised and/or new versions
\&of the 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.
.Ve
.PP
Each version is given a distinguishing version number.  If the Program
specifies a version number of this License which applies to it and
\&\*(L"any later version\*(R", 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 Program does not specify a
version number of this License, you may choose any version ever
published by the Free Software Foundation.
.PP
.Vb 7
\&  10. If you wish to incorporate parts of the Program into other free
\&programs whose distribution conditions are different, 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
\&
\&  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
\&WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
\&EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
\&OTHER PARTIES PROVIDE THE PROGRAM "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
\&PROGRAM IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
\&THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
\&
\&  12. 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 PROGRAM 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
\&PROGRAM (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 PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 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 Programs
\&
\&  If you develop a new program, and you want it to be of the greatest
\&possible use to the public, the best way to achieve this is to make it
\&free software which everyone can redistribute and change under these
\&terms.
\&
\&  To do so, attach the following notices to the program.  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 program\*(Aqs name and a brief idea of what it does.>
\&    Copyright (C) <year>  <name of author>
\&
\&    This program is free software; you can redistribute it and/or modify
\&    it under the terms of the GNU General Public License as published by
\&    the Free Software Foundation; either version 2 of the License, or
\&    (at your option) any later version.
\&
\&    This program is distributed in the hope that it will be useful,
\&    but WITHOUT ANY WARRANTY; without even the implied warranty of
\&    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
\&    GNU General Public License for more details.
\&
\&    You should have received a copy of the GNU General Public License
\&    along with this program; if not, write to the Free Software
\&    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110\-1301, USA
.Ve
.PP
Also add information on how to contact you by electronic and paper mail.
.PP
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
.PP
.Vb 4
\&    Gnomovision version 69, Copyright (C) year name of author
\&    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type \`show w\*(Aq.
\&    This is free software, and you are welcome to redistribute it
\&    under certain conditions; type \`show c\*(Aq for details.
.Ve
.PP
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License.  Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items\*(--whatever suits your program.
.PP
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a \*(L"copyright disclaimer\*(R" for the program, if
necessary.  Here is a sample; alter the names:
.PP
.Vb 2
\&  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
\&  \`Gnomovision\*(Aq (which makes passes at compilers) written by James Hacker.
\&
\&  <signature of Ty Coon>, 1 April 1989
\&  Ty Coon, President of Vice
.Ve
.PP
This General Public License does not permit incorporating your program into
proprietary programs.  If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library.  If this is what you want to do, use the \s-1GNU\s0 Library General
Public License instead of this License.
.PP
[End.]