Modify API to allow single-threaded operation

Added usrsctp_init_nothreads to initialize without creating threads
Added usrsctp_fire_timer to fire the SCTP timer from an application thread
Added usrsctp_get_events to get read, write and error events on a socket
Added usrsctp_set_upcall to receive a callback when socket events occur

programs/Makefile.am

@@ -29,8 +29,8 @@
 #
 
 AM_CPPFLAGS = -I$(srcdir)/../usrsctplib
-EXTRA_DIST = Makefile.nmake tsctp.c daytime_server.c discard_server.c echo_server.c client.c rtcweb.c ekr_client.c ekr_server.c ekr_loop.c
-noinst_PROGRAMS = tsctp daytime_server discard_server echo_server client rtcweb ekr_client ekr_server ekr_peer ekr_loop
+EXTRA_DIST = Makefile.nmake tsctp.c daytime_server.c discard_server.c echo_server.c client.c rtcweb.c ekr_client.c ekr_server.c ekr_loop.c st_client.c
+noinst_PROGRAMS = tsctp daytime_server discard_server echo_server client rtcweb ekr_client ekr_server ekr_peer ekr_loop st_client
 tsctp_SOURCES = tsctp.c
 tsctp_LDADD = ../usrsctplib/libusrsctp.la
 daytime_server_SOURCES = daytime_server.c
@@ -51,4 +51,5 @@ ekr_peer_SOURCES = ekr_peer.c
 ekr_peer_LDADD = ../usrsctplib/libusrsctp.la
 ekr_loop_SOURCES = ekr_loop.c
 ekr_loop_LDADD = ../usrsctplib/libusrsctp.la
-
+st_client_SOURCES = st_client.c
+st_client_LDADD = ../usrsctplib/libusrsctp.la

programs/Makefile.nmake

@@ -47,7 +47,8 @@ all: \
 	ekr_client \
 	ekr_server \
 	ekr_peer \
-	ekr_loop
+	ekr_loop \
+	st_client
 
 client:
 	$(CC) $(CFLAGS) $(CVARSDLL) -c client.c
@@ -89,6 +90,10 @@ ekr_loop:
 	$(CC) $(CFLAGS) $(CVARSDLL) -c ekr_loop.c
 	link -out:ekr_loop.exe ekr_loop.obj $(LINKFLAGS)
 
+st_client:
+    $(CC) $(CFLAGS) $(CVARSDLL) -c st_client.c
+    link -out:st_client.exe st_client.obj $(LINKFLAGS)
+
 clean:
 	del /F client.exe
 	del /F client.obj