Add log_level command

This can be used to display the current debugging level and to change
the log level during run time.

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

wpa_supplicant/ctrl_iface.c

@@ -920,6 +920,99 @@ static int wpa_supplicant_ctrl_iface_bssid(struct wpa_supplicant *wpa_s,
 }
 
 
+extern int wpa_debug_level;
+extern int wpa_debug_timestamp;
+
+static const char * debug_level_str(int level)
+{
+	switch (level) {
+	case MSG_EXCESSIVE:
+		return "EXCESSIVE";
+	case MSG_MSGDUMP:
+		return "MSGDUMP";
+	case MSG_DEBUG:
+		return "DEBUG";
+	case MSG_INFO:
+		return "INFO";
+	case MSG_WARNING:
+		return "WARNING";
+	case MSG_ERROR:
+		return "ERROR";
+	default:
+		return "?";
+	}
+}
+
+
+static int str_to_debug_level(const char *s)
+{
+	if (os_strcasecmp(s, "EXCESSIVE") == 0)
+		return MSG_EXCESSIVE;
+	if (os_strcasecmp(s, "MSGDUMP") == 0)
+		return MSG_MSGDUMP;
+	if (os_strcasecmp(s, "DEBUG") == 0)
+		return MSG_DEBUG;
+	if (os_strcasecmp(s, "INFO") == 0)
+		return MSG_INFO;
+	if (os_strcasecmp(s, "WARNING") == 0)
+		return MSG_WARNING;
+	if (os_strcasecmp(s, "ERROR") == 0)
+		return MSG_ERROR;
+	return -1;
+}
+
+
+static int wpa_supplicant_ctrl_iface_log_level(struct wpa_supplicant *wpa_s,
+					       char *cmd, char *buf,
+					       size_t buflen)
+{
+	char *pos, *end, *stamp;
+	int ret;
+
+	if (cmd == NULL) {
+		return -1;
+	}
+
+	/* cmd: "LOG_LEVEL [<level>]" */
+	if (*cmd == '\0') {
+		pos = buf;
+		end = buf + buflen;
+		ret = os_snprintf(pos, end - pos, "Current level: %s\n"
+				  "Timestamp: %d\n",
+				  debug_level_str(wpa_debug_level),
+				  wpa_debug_timestamp);
+		if (ret < 0 || ret >= end - pos)
+			ret = 0;
+
+		return ret;
+	}
+
+	while (*cmd == ' ')
+		cmd++;
+
+	stamp = os_strchr(cmd, ' ');
+	if (stamp) {
+		*stamp++ = '\0';
+		while (*stamp == ' ') {
+			stamp++;
+		}
+	}
+
+	if (cmd && os_strlen(cmd)) {
+		int level = str_to_debug_level(cmd);
+		if (level < 0)
+			return -1;
+		wpa_debug_level = level;
+	}
+
+	if (stamp && os_strlen(stamp))
+		wpa_debug_timestamp = atoi(stamp);
+
+	os_memcpy(buf, "OK\n", 3);
+	return 3;
+}
+
+
 static int wpa_supplicant_ctrl_iface_list_networks(
 	struct wpa_supplicant *wpa_s, char *buf, size_t buflen)
 {
@@ -3309,6 +3402,9 @@ char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
 	} else if (os_strncmp(buf, "BSSID ", 6) == 0) {
 		if (wpa_supplicant_ctrl_iface_bssid(wpa_s, buf + 6))
 			reply_len = -1;
+	} else if (os_strncmp(buf, "LOG_LEVEL", 9) == 0) {
+		reply_len = wpa_supplicant_ctrl_iface_log_level(
+			wpa_s, buf + 9, reply, reply_size);
 	} else if (os_strcmp(buf, "LIST_NETWORKS") == 0) {
 		reply_len = wpa_supplicant_ctrl_iface_list_networks(
 			wpa_s, reply, reply_size);

wpa_supplicant/wpa_cli.c

@@ -1224,6 +1224,32 @@ static int wpa_cli_cmd_bssid(struct wpa_ctrl *ctrl, int argc, char *argv[])
 }
 
 
+static int wpa_cli_cmd_log_level(struct wpa_ctrl *ctrl, int argc, char *argv[])
+{
+	char cmd[256], *pos, *end;
+	int i, ret;
+
+	end = cmd + sizeof(cmd);
+	pos = cmd;
+	ret = os_snprintf(pos, end - pos, "LOG_LEVEL");
+	if (ret < 0 || ret >= end - pos) {
+		printf("Too long LOG_LEVEL command.\n");
+		return -1;
+	}
+	pos += ret;
+	for (i = 0; i < argc; i++) {
+		ret = os_snprintf(pos, end - pos, " %s", argv[i]);
+		if (ret < 0 || ret >= end - pos) {
+			printf("Too long LOG_LEVEL command.\n");
+			return -1;
+		}
+		pos += ret;
+	}
+
+	return wpa_ctrl_command(ctrl, cmd);
+}
+
+
 static int wpa_cli_cmd_list_networks(struct wpa_ctrl *ctrl, int argc,
 				     char *argv[])
 {
@@ -2471,6 +2497,10 @@ static struct wpa_cli_cmd wpa_cli_commands[] = {
 	{ "bssid", wpa_cli_cmd_bssid,
 	  cli_cmd_flag_none,
 	  "<network id> <BSSID> = set preferred BSSID for an SSID" },
+	{ "log_level", wpa_cli_cmd_log_level,
+	  cli_cmd_flag_none,
+	  "<level> [<timestamp>] = update the log level/timestamp\n"
+	  "log_level = display the current log level and log options" },
 	{ "list_networks", wpa_cli_cmd_list_networks,
 	  cli_cmd_flag_none,
 	  "= list configured networks" },