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Andy Greenc11b5872013-02-07 23:44:21 +08001Libwebsockets and included programs are provided under the terms of the GNU
2Library General Public License (LGPL) 2.1, with the following exceptions:
3
Andy Greend12b3df2017-05-19 09:25:54 +080041) Any reference, whether in these modifications or in the GNU
5Library General Public License 2.1, to this License, these terms, the
6GNU Lesser Public License, GNU Library General Public License, LGPL, or
7any similar reference shall refer to the GNU Library General Public
8License 2.1 as modified by these paragraphs 1) through 4).
9
102) Static linking of programs with the libwebsockets library does not
Andy Greenc11b5872013-02-07 23:44:21 +080011constitute a derivative work and does not require the author to provide
12source code for the program, use the shared libwebsockets libraries, or
13link their program against a user-supplied version of libwebsockets.
14
15If you link the program to a modified version of libwebsockets, then the
16changes to libwebsockets must be provided under the terms of the LGPL in
17sections 1, 2, and 4.
18
Andy Greend12b3df2017-05-19 09:25:54 +0800193) You do not have to provide a copy of the libwebsockets license with
Andy Greenc11b5872013-02-07 23:44:21 +080020programs that are linked to the libwebsockets library, nor do you have to
21identify the libwebsockets license in your program or documentation as
22required by section 6 of the LGPL.
23
24However, programs must still identify their use of libwebsockets. The
25following example statement can be included in user documentation to
26satisfy this requirement:
27
28"[program] is based in part on the work of the libwebsockets project
Andy Greence0326b2016-02-21 10:42:46 +080029(https://libwebsockets.org)"
Andy Greenc11b5872013-02-07 23:44:21 +080030
Andy Greend12b3df2017-05-19 09:25:54 +0800314) Some sources included have their own, more liberal licenses, or options
Andy Green083c73e2016-02-08 08:44:21 +080032to get original sources with the liberal terms.
33
34Original liberal license retained
35
36 - lib/sha-1.c - 3-clause BSD license retained, link to original
37 - win32port/zlib - ZLIB license (see zlib.h)
38
39Relicensed to libwebsocket license
40
41 - lib/base64-decode.c - relicensed to LGPL2.1+SLE, link to original
42 - lib/daemonize.c - relicensed from Public Domain to LGPL2.1+SLE,
43 link to original Public Domain version
44
45Public Domain (CC-zero) to simplify reuse
46
47 - test-server/*.c
48 - test-server/*.h
Andy Green0c984012016-09-19 19:16:47 +080049 - lwsws/*
Andy Greend12b3df2017-05-19 09:25:54 +080050
51------ end of exceptions
52
Andy Green75020012013-02-07 23:43:56 +080053 GNU LESSER GENERAL PUBLIC LICENSE
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