keep a tested copy of UDT4 here.

LICENSE.txt

@@ -0,0 +1,32 @@
+Copyright (c) 2001 - 2011, The Board of Trustees of the University of Illinois.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+* Redistributions of source code must retain the above 
+  copyright notice, this list of conditions and the 
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the
+  above copyright notice, this list of conditions
+  and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of the University of Illinois
+  nor the names of its contributors may be used to
+  endorse or promote products derived from this
+  software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Makefile

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+DIRS = src app
+TARGETS = all clean install
+
+$(TARGETS): %: $(patsubst %, %.%, $(DIRS))
+
+$(foreach TGT, $(TARGETS), $(patsubst %, %.$(TGT), $(DIRS))):
+	$(MAKE) -C $(subst ., , $@)

README.txt

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+Copyright (c) 2001 - 2011, The Board of Trustees of the University of Illinois.
+All Rights Reserved.
+Copyright (c) 2011, Google, Inc. All Rights Reserved.
+
+UDP-based Data Transfer (UDT) Library - version 4
+Author: Yunhong Gu [yunhong.gu @ gmail.com]
+
+UDT version 4 is free software under BSD License. See ./LICENSE.txt.
+
+============================================================================
+
+UDT Website:
+http://udt.sf.net
+http://sf.net/projects/udt/ 
+
+
+CONTENT: 
+./src:     UDT source code 
+./app:     Example programs 
+./doc:     UDT documentation (HTML)
+./win:     Visual C++ project files for the Windows version of UDT 
+
+
+To make: 
+     make -e os=XXX arch=YYY 
+
+XXX: [LINUX(default), BSD, OSX] 
+YYY: [IA32(default), POWERPC, IA64, AMD64] 
+
+For example, on OS X, you may need to do "make -e os=OSX arch=POWERPC"; 
+on 32-bit i386 Linux system, simply use "make".
+
+On Windows systems, use the Visual C++ project files in ./win directory.
+
+
+To use UDT in your application:
+Read index.htm in ./doc. The documentation is in HTML format and requires your
+browser to support JavaScript.
+
+
+Questions? please post to the UDT project forum:
+https://sourceforge.net/projects/udt/forums

RELEASE_NOTES.txt

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+version 4.10
+
+fixed a bug that causes unnecessary connection timeout
+improved epoll UDT event handling
+
+version 4.9
+
+asynchronous close
+asynchronous connect
+some bug fixes, especially on EPOLL
+improved cache code
+removed unnecessary NAK (reduced loss retransmission)
+receiver side error can unblock a blocked sender
+
+version 4.8
+
+fix a bug that may cause seg fault on concurrent close on the same socket
+add epoll support
+increase the listener's scalability to 100K concurrent connections
+fix a bug that may cause accept/select to return positively when an accepted socket is closed immediately after accept returns
+fix a bug that may cause connect to fail if the server closes listening socket immediately after accept returns
+fix recvfile fstream write status bug (e.g., when disk is full, recvfile should handle properly now)
+
+version 4.7a
+
+fix timeout bug introduced in 4.7
+initialize CHandShake
+
+version 4.7
+
+Fix several related bugs that can cause hang/memory leak/segmentation fault during cleanup()