usrsctp in cygwin under windows 64-bit

[jerabekj-but]

I am trying to make usrsctplib in Cygwin (maybe not a good idea).
I am not experienced with Linux-like systems and commands.
I was able to run "./bootstrap", "./configure with --disable-inet6" succesfully. And when i run "make" I got:
"
user_environment.c:383:2: error: #error "Unknown platform. Please provide platform specific RNG."
383 | #error "Unknown platform. Please provide platform specific RNG."
| ^~~~~
make[1]: *** [Makefile:635: libusrsctp_la-user_environment.lo] Error 1
make[1]: Opouští se adresář „/cygdrive/d/usrsctp-cygwin/usrsctplib“
make: *** [Makefile:407: all-recursive] Error 1
"
Is there a way how to solve this issue?
Thanks a lot.
btw: please do not advice me to install Linux instead. I was able to install usrsctp in Ubuntu, now I would like to have it in Windows, if possible.

[tuexen]

You can compile usrsctp in Windows without using cygwin. @weinrank can tell you what you need.

[jerabekj-but]

You can compile usrsctp in Windows without using cygwin. @weinrank can tell you what you need.

I am using cygwin to compile iperf3 for windows. I would like to compile iperf3 with SCTP support. Therefore, I am trying to get usrsctp to cygwin. Is there a way how to do it? @tuexen

[tuexen]

Then you need to port it to cygwin...

[jerabekj-but]

Then you need to port it to cygwin...

I cannot imagine what should be done to port it to cygwin. I have no idea how complicated is such a thing. Is there some guideline? @tuexen

[tuexen]

Unfortunately, I have no experience with cygwin or Windows at all...

[jerabekj-but]

@tuexen Ok, I will leave the cygwin solution for a while.
I am trying to use your test programs compiled in Visual Studio in my computer. I am able to run client.exe and discard_server.exe in UDP encapsulation mode over Loopback interface (in administrator mode) as shown in example. However, it does not work properly, it ends with exchange of INIT and INIT_ACK messages (see figure).

Unfortunately, I am not able to understand the code of the example programs (client, client_upcall, ...). So it is very hard for me to use these files. For instance, I have no idea how to force any of your programs to use IPv4 instead of IPv6. I have no idea what is the difference between client and client_upcall, for istance. What is ekr_client and ekr_server for? Is there some manual or some other examples of usage of your programs?
I would just like to try to make some succesful SCTP/IP communication over the network (without NAT).
Thanks for your help.

[tuexen]

Please compile the examples with SCTP_DEBUG being defined. Then you get some debug output which might help.
client and client_upcall are examples how to use different API for implementing a client. The ekr_client and ekr_server where intended to show certain aspects of the API.