hostapd: Add support to configure debug log level at runtime

Add support to read/configure log_level using hostapd control interface
LOG_LEVEL command similarly to what was already supported in
wpa_supplicant.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

hostapd/ctrl_iface.c

@@ -1961,6 +1961,52 @@ static int hostapd_ctrl_iface_eapol_set(struct hostapd_data *hapd, char *cmd)
 }
 
 
+static int hostapd_ctrl_iface_log_level(struct hostapd_data *hapd, char *cmd,
+					char *buf, size_t buflen)
+{
+	char *pos, *end, *stamp;
+	int ret;
+
+	/* 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 (os_snprintf_error(end - pos, ret))
+			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 hostapd_ctrl_iface_receive_process(struct hostapd_data *hapd,
 					      char *buf, char *reply,
 					      int reply_size,
@@ -2189,6 +2235,9 @@ static int hostapd_ctrl_iface_receive_process(struct hostapd_data *hapd,
 	} else if (os_strncmp(buf, "EAPOL_SET ", 10) == 0) {
 		if (hostapd_ctrl_iface_eapol_set(hapd, buf + 10))
 			reply_len = -1;
+	} else if (os_strncmp(buf, "LOG_LEVEL", 9) == 0) {
+		reply_len = hostapd_ctrl_iface_log_level(
+			hapd, buf + 9, reply, reply_size);
 	} else {
 		os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
 		reply_len = 16;

hostapd/hostapd_cli.c

@@ -1039,6 +1039,25 @@ static int hostapd_cli_cmd_erp_flush(struct wpa_ctrl *ctrl, int argc,
 }
 
 
+static int hostapd_cli_cmd_log_level(struct wpa_ctrl *ctrl, int argc,
+				     char *argv[])
+{
+	char cmd[256];
+	int res;
+
+	res = os_snprintf(cmd, sizeof(cmd), "LOG_LEVEL%s%s%s%s",
+			  argc >= 1 ? " " : "",
+			  argc >= 1 ? argv[0] : "",
+			  argc == 2 ? " " : "",
+			  argc == 2 ? argv[1] : "");
+	if (os_snprintf_error(sizeof(cmd), res)) {
+		printf("Too long option\n");
+		return -1;
+	}
+	return wpa_ctrl_command(ctrl, cmd);
+}
+
+
 struct hostapd_cli_cmd {
 	const char *cmd;
 	int (*handler)(struct wpa_ctrl *ctrl, int argc, char *argv[]);
@@ -1096,6 +1115,7 @@ static const struct hostapd_cli_cmd hostapd_cli_commands[] = {
 	{ "reload", hostapd_cli_cmd_reload },
 	{ "disable", hostapd_cli_cmd_disable },
 	{ "erp_flush", hostapd_cli_cmd_erp_flush },
+	{ "log_level", hostapd_cli_cmd_log_level },
 	{ NULL, NULL }
 };