add example sctp_both.nim

examples/sctp_both.nim

@@ -0,0 +1,27 @@
+import chronos, stew/byteutils
+import ../webrtc/sctp as sc
+
+let sctp = Sctp.new(port = 4242)
+proc serv(fut: Future[void]) {.async.} =
+  #let sctp = Sctp.new(port = 4242)
+  sctp.startServer(13)
+  fut.complete()
+  let conn = await sctp.listen()
+  echo "await read()"
+  let msg = await conn.read()
+  echo "read() finished"
+  echo "Receive: ", string.fromBytes(msg)
+  await conn.close()
+  sctp.stopServer()
+
+proc main() {.async.} =
+  let fut = Future[void]()
+  asyncSpawn serv(fut)
+  await fut
+  #let sctp = Sctp.new(port = 4244)
+  let address = TransportAddress(initTAddress("127.0.0.1:4242"))
+  let conn = await sctp.connect(address, sctpPort = 13)
+  await conn.write("test".toBytes)
+  await conn.close()
+
+waitFor(main())