library: add HTTP_Server_Emulation
We already have an HTTP_Adapter, which plays the client role. Now let's
add an HTTP_Server_Emulation, that will allow us to play the server role
as well.
Related: SYS#6563
Change-Id: Ie9a3b31a047b617ae69b7a65e1d69b8d3da863e5
diff --git a/library/HTTP_Server_Emulation.ttcn b/library/HTTP_Server_Emulation.ttcn
new file mode 100644
index 0000000..16d142d
--- /dev/null
+++ b/library/HTTP_Server_Emulation.ttcn
@@ -0,0 +1,147 @@
+/* HTTP Emulation in TTCN-3
+ *
+ * Author: Philipp Maier <pmaier@sysmocom.de> / sysmocom - s.f.m.c. GmbH
+ *
+ * Released under the terms of GNU General Public License, Version 2 or
+ * (at your option) any later version.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This module implements a HTTP/HTTPs server based on TestPorts/HTTPmsg,
+ * (see also deps/titan.TestPorts.HTTPmsg)
+ */
+
+module HTTP_Server_Emulation {
+
+import from General_Types all;
+import from Osmocom_Types all;
+import from HTTPmsg_Types all;
+import from HTTPmsg_PortType all;
+
+/***********************************************************************
+ * Main Emulation Component
+ ***********************************************************************/
+
+type record HttpServerEmulationCfg {
+ charstring http_bind_ip,
+ integer http_bind_port,
+ boolean use_ssl
+};
+
+type component HTTP_Server_Emulation_CT {
+ /* Communication with underlying HTTP CodecPort */
+ port HTTPmsg_PT HTTP_server_port;
+
+ /* Communication with Clients */
+ port HTTP_SRV_PT CLIENT;
+ port HTTP_SRV_PROC_PT CLIENT_PROC;
+ port HTTP_SRV_PT CLIENT_DEFAULT;
+
+ /* Configuration by the user */
+ var HttpServerEmulationCfg g_http_cfg;
+
+ /* State */
+ var HTTP_ConnHdlr vc_conn_table[16];
+};
+
+private function f_init(HttpServerEmulationCfg cfg) runs on HTTP_Server_Emulation_CT {
+
+ g_http_cfg := cfg;
+
+ map(self:HTTP_server_port, system:HTTP_server_port);
+ var Listen listen := { local_hostname := g_http_cfg.http_bind_ip,
+ portnumber := g_http_cfg.http_bind_port,
+ use_ssl := g_http_cfg.use_ssl };
+
+ /* Start HTTP server */
+ HTTP_server_port.send(listen);
+}
+
+private function f_vc_conn_table_add(HTTP_ConnHdlr vc_conn) runs on HTTP_Server_Emulation_CT {
+ var integer i;
+ for (i := 0; i < sizeof(vc_conn_table); i := i + 1) {
+ if (not isbound(vc_conn_table[i])) {
+ vc_conn_table[i] := vc_conn;
+ return;
+ }
+ }
+ testcase.stop("No Space in vc_conn_table[i] for ", vc_conn);
+}
+
+/* Forward request to all registered clients */
+private function forward_req(HTTPMessage recv_req_value) runs on HTTP_Server_Emulation_CT {
+
+ var integer i;
+ for (i := 0; i < sizeof(vc_conn_table); i := i + 1) {
+ if (isbound(vc_conn_table[i])) {
+ CLIENT.send(recv_req_value) to vc_conn_table[i];
+ }
+ }
+}
+
+function main(HttpServerEmulationCfg cfg) runs on HTTP_Server_Emulation_CT {
+
+ var HTTP_ConnHdlr vc_conn;
+ var template (value) Close close := { client_id := omit };
+ var template (present) Half_close half_close := { client_id := ? };
+ var template (present) HTTPMessage recv_req := { request := ? };
+ var template (present) HTTPMessage recv_req_bin := { request_binary := ? };
+ var HTTPMessage recv_req_value;
+ var HTTPMessage send_resp_value;
+
+ f_init(cfg);
+
+ while(true) {
+ alt {
+ [] HTTP_server_port.receive(recv_req) -> value recv_req_value {
+ forward_req(recv_req_value);
+ }
+ [] HTTP_server_port.receive(recv_req_bin) -> value recv_req_value {
+ forward_req(recv_req_value);
+ }
+ [] CLIENT.receive(HTTPMessage:?) -> value send_resp_value sender vc_conn {
+ HTTP_server_port.send(send_resp_value);
+ }
+ [] HTTP_server_port.receive(half_close) {
+ HTTP_server_port.send(close);
+ }
+ [] CLIENT_PROC.getcall(HTTPEM_register:{}) -> sender vc_conn {
+ f_vc_conn_table_add(vc_conn);
+ CLIENT_PROC.reply(HTTPEM_register:{}) to vc_conn;
+ }
+ }
+ }
+
+}
+
+
+/***********************************************************************
+ * Interaction between Main and Client Components
+ ***********************************************************************/
+type port HTTP_SRV_PT message {
+ inout HTTPMessage;
+} with { extension "internal" };
+
+signature HTTPEM_register();
+
+type port HTTP_SRV_PROC_PT procedure {
+ inout HTTPEM_register;
+} with { extension "internal" };
+
+
+/***********************************************************************
+ * Client Component
+ ***********************************************************************/
+
+type component HTTP_ConnHdlr {
+ port HTTP_SRV_PT HTTP_SRV;
+ port HTTP_SRV_PROC_PT HTTP_SRV_PROC;
+};
+
+function f_http_register() runs on HTTP_ConnHdlr {
+ HTTP_SRV_PROC.call(HTTPEM_register:{}) {
+ [] HTTP_SRV_PROC.getreply(HTTPEM_register:{});
+ }
+}
+
+}