sys/shell: integrate OpenThread CLI into RIOT shell

Until now OpenThread CLI and RIOT shell could not be used at the same
time. Now it is possible to use all CLI command with the prefix "ot". To
get an overview use "ot help".

Author: morigawa

makefiles/pseudomodules.inc.mk

@@ -429,6 +429,7 @@ PSEUDOMODULES += shell_cmd_nice
 PSEUDOMODULES += shell_cmd_nimble_netif
 PSEUDOMODULES += shell_cmd_nimble_statconn
 PSEUDOMODULES += shell_cmd_opendsme
+PSEUDOMODULES += shell_cmd_openthread
 PSEUDOMODULES += shell_cmd_openwsn
 PSEUDOMODULES += shell_cmd_pm
 PSEUDOMODULES += shell_cmd_ps

sys/shell/Makefile.dep

@@ -93,6 +93,9 @@ ifneq (,$(filter shell_cmds_default,$(USEMODULE)))
   ifneq (,$(filter opendsme,$(USEPKG)))
     USEMODULE += shell_cmd_opendsme
   endif
+  ifneq (,$(filter openthread-cli-%,$(USEMODULE)))
+    USEMODULE += shell_cmd_openthread
+  endif
   ifneq (,$(filter openwsn,$(USEPKG)))
     USEMODULE += shell_cmd_openwsn
   endif

sys/shell/cmds/openthread.c

@@ -0,0 +1,60 @@
+/*
+ * SPDX-FileCopyrightText: 2025 TU Dresden
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
+
+/**
+ * @ingroup     sys_shell_commands
+ * @{
+ *
+ * @file
+ * @brief       Shell command implementation for OpenThread
+ *
+ * @author      Moritz Voigt <[email protected]>
+ *
+ * @}
+ */
+#include <stdio.h>
+#include <string.h>
+
+#include "shell.h"
+#include "openthread/cli.h"
+
+static int ot_console_cb(const char *abuf, uint16_t bufsize, void *context)
+{
+    (void) context;
+    if (bufsize > 0)
+    {
+        printf("%.*s", bufsize, abuf);
+    }
+    return 0;
+}
+
+static int ot_cmd(int argc, char **argv)
+{
+    char command[SHELL_DEFAULT_BUFSIZE];
+    for (int i = 1; i < argc; i++){
+        if (i == 1)
+        {
+            strncpy(command, argv[i], SHELL_DEFAULT_BUFSIZE-1);
+        }
+        else
+        {
+            strncat(command, " ", SHELL_DEFAULT_BUFSIZE-strlen(command)-1);
+            strncat(command, argv[i], SHELL_DEFAULT_BUFSIZE-strlen(command)-1);
+        }
+    }
+
+    if (strlen(command) != 0)
+    {
+        otCliConsoleInputLine(command, SHELL_DEFAULT_BUFSIZE);
+    }
+    return 0;
+}
+
+SHELL_COMMAND(ot, "Use commands from OpenThread CLI", ot_cmd);
+
+void ot_shell_init(otInstance *aInstance)
+{
+    otCliConsoleInit(aInstance, ot_console_cb, NULL);
+}