feat(modem): Added target test config with CHAP authentication

Related to https://github.com/espressif/esp-protocols/issues/635

.github/workflows/modem__target-test.yml

@@ -15,7 +15,7 @@ jobs:
       matrix:
         idf_ver: ["latest"]
         idf_target: ["esp32c3"]
-        test: [ { app: pppd, path: test/target }, { app: sim800_c3, path: examples/pppos_client }, { app: sim800_cmux, path: examples/simple_cmux_client } ]
+        test: [ { app: pppd, path: test/target }, { app: pppd_chap_auth, path: test/target }, { app: sim800_c3, path: examples/pppos_client }, { app: sim800_cmux, path: examples/simple_cmux_client } ]
         include:
           - idf_ver: "latest"
             idf_target: "esp32s2"
@@ -58,7 +58,7 @@ jobs:
       matrix:
         idf_ver: ["latest"]
         idf_target: ["esp32c3"]
-        test: [ { app: pppd, path: test/target }, { app: sim800_c3, path: examples/pppos_client }, { app: sim800_cmux, path: examples/simple_cmux_client } ]
+        test: [ { app: pppd, path: test/target }, { app: pppd_chap_auth, path: test/target }, { app: sim800_c3, path: examples/pppos_client }, { app: sim800_cmux, path: examples/simple_cmux_client } ]
         include:
           - idf_ver: "latest"
             idf_target: "esp32s2"

components/esp_modem/test/target/main/Kconfig.projbuild

@@ -27,12 +27,23 @@ menu "Test App Configuration"
         help
             Pin number of UART RX.
 
-    config TEST_APP_TCP_PORT
+    config TEST_APP_AUTH
-        int "Port of test"
+        bool "Use PPP authentication"
-        range 0 65535
+        select LWIP_PPP_CHAP_SUPPORT
-        default 2222
+        default n
         help
-            The remote port to which the client will connects to
+            Set to true for the PPP client to use authentication
-            once the PPP connection established
+
+    config TEST_APP_AUTH_USERNAME
+        string "Set username for authentication"
+        default "myclient"
+        help
+            Username to authenticate the PPP connection.
+
+    config TEST_APP_AUTH_PASSWORD
+        string "Set password for authentication"
+        default "mypassword"
+        help
+            Password to authenticate the PPP connection.
 
 endmenu

components/esp_modem/test/target/main/pppd_test.cpp

@@ -94,6 +94,10 @@ extern "C" void app_main(void)
     ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, ESP_EVENT_ANY_ID, on_modem_event, nullptr));
     ESP_ERROR_CHECK(esp_event_handler_register(NETIF_PPP_STATUS, ESP_EVENT_ANY_ID, &on_ppp_changed, nullptr));
 
+#if CONFIG_TEST_APP_AUTH
+    esp_netif_ppp_set_auth(ppp_netif, NETIF_PPP_AUTHTYPE_CHAP, CONFIG_TEST_APP_AUTH_USERNAME, CONFIG_TEST_APP_AUTH_PASSWORD);
+#endif
+
     modem_start_network();
     Catch::Session session;
     int numFailed = session.run();

components/esp_modem/test/target/pytest_pppd.py

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
+# SPDX-FileCopyrightText: 2022-2024 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Unlicense OR CC0-1.0
 from __future__ import print_function, unicode_literals
 
@@ -9,14 +9,20 @@ from threading import Event, Thread
 import netifaces
 
 
-def run_server(server_stop, port, server_ip, client_ip):
+def run_server(server_stop, port, server_ip, client_ip, auth, auth_user, auth_password):
     print('Starting PPP server on port: {}'.format(port))
     try:
         arg_list = [
             'sudo', 'pppd', port, '115200',
-            '{}:{}'.format(server_ip, client_ip), 'modem', 'local', 'noauth',
+            '{}:{}'.format(server_ip, client_ip), 'modem', 'local',
             'debug', 'nocrtscts', 'nodetach', '+ipv6'
         ]
+        if auth:
+            arg_list.extend(['auth', '+chap'])
+            subprocess.run(['sudo', 'rm', '/etc/ppp/chap-secrets'])
+            subprocess.run(f"echo '{auth_user} * {auth_password} *' | sudo tee -a /etc/ppp/chap-secrets", shell=True)
+        else:
+            arg_list.append('noauth')
         p = subprocess.Popen(arg_list, stdout=subprocess.PIPE, bufsize=1)
         while not server_stop.is_set():
             if p.poll() is not None:
@@ -51,6 +57,9 @@ def test_examples_protocol_pppos_connect(dut):
     try:
         server_ip = dut.app.sdkconfig.get('TEST_APP_PPP_SERVER_IP')
         client_ip = dut.app.sdkconfig.get('TEST_APP_PPP_CLIENT_IP')
+        auth = dut.app.sdkconfig.get('TEST_APP_AUTH')
+        auth_user = dut.app.sdkconfig.get('TEST_APP_AUTH_USERNAME')
+        auth_password = dut.app.sdkconfig.get('TEST_APP_AUTH_PASSWORD')
     except Exception:
         print(
             'ENV_TEST_FAILURE: Some mandatory configuration not found in sdkconfig'
@@ -63,7 +72,7 @@ def test_examples_protocol_pppos_connect(dut):
     # Start the PPP server
     server_stop = Event()
     t = Thread(target=run_server,
-               args=(server_stop, port, server_ip, client_ip))
+               args=(server_stop, port, server_ip, client_ip, auth, auth_user, auth_password))
     t.start()
     try:
         ppp_server_timeout = time.time() + 30

components/esp_modem/test/target/sdkconfig.ci.pppd_chap_auth

@@ -0,0 +1,4 @@
+CONFIG_COMPILER_CXX_EXCEPTIONS=y
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=4096
+CONFIG_LWIP_PPP_SUPPORT=y
+CONFIG_TEST_APP_AUTH=y

components/esp_modem/test/target/sdkconfig.defaults

@@ -1,4 +1,3 @@
 CONFIG_COMPILER_CXX_EXCEPTIONS=y
-CONFIG_CXX_EXCEPTIONS=y
-CONFIG_PPP_SUPPORT=y
 CONFIG_ESP_MAIN_TASK_STACK_SIZE=4096
+CONFIG_LWIP_PPP_SUPPORT=y