Add a mechanism to insert notes to wpa_supplicant debug log

This can be used to insert information from external programs to the
wpa_supplicant debug log.

wpa_supplicant/ctrl_iface.c

@@ -1761,6 +1761,8 @@ char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
 	if (os_strcmp(buf, "PING") == 0) {
 		os_memcpy(reply, "PONG\n", 5);
 		reply_len = 5;
+	} else if (os_strncmp(buf, "NOTE ", 5) == 0) {
+		wpa_printf(MSG_INFO, "NOTE: %s", buf + 5);
 	} else if (os_strcmp(buf, "MIB") == 0) {
 		reply_len = wpa_sm_get_mib(wpa_s->wpa, reply, reply_size);
 		if (reply_len >= 0) {

wpa_supplicant/wpa_cli.c

@@ -371,6 +371,19 @@ static int wpa_cli_cmd_ping(struct wpa_ctrl *ctrl, int argc, char *argv[])
 }
 
 
+static int wpa_cli_cmd_note(struct wpa_ctrl *ctrl, int argc, char *argv[])
+{
+	char cmd[256];
+	int ret;
+	if (argc == 0)
+		return -1;
+	ret = os_snprintf(cmd, sizeof(cmd), "NOTE %s", argv[0]);
+	if (ret < 0 || (size_t) ret >= sizeof(cmd))
+		return -1;
+	return wpa_ctrl_command(ctrl, cmd);
+}
+
+
 static int wpa_cli_cmd_mib(struct wpa_ctrl *ctrl, int argc, char *argv[])
 {
 	return wpa_ctrl_command(ctrl, "MIB");
@@ -1578,6 +1591,9 @@ static struct wpa_cli_cmd wpa_cli_commands[] = {
 	{ "ping", wpa_cli_cmd_ping,
 	  cli_cmd_flag_none,
 	  "= pings wpa_supplicant" },
+	{ "note", wpa_cli_cmd_note,
+	  cli_cmd_flag_none,
+	  "<text> = add a note to wpa_supplicant debug log" },
 	{ "mib", wpa_cli_cmd_mib,
 	  cli_cmd_flag_none,
 	  "= get MIB variables (dot1x, dot11)" },