net: wifi_mgmt: Support to configure AP parameter max_num_sta

Support to set BSS parameter "max_num_sta" at compile and run time

Added support to configure `max_num_sta` BSS parameter.
Maximum number of stations allowed in station table. New stations will be
rejected after the station table is full.

Signed-off-by: Ajay Parida <ajay.parida@nordicsemi.no>

Author: ajayparida

include/zephyr/net/wifi.h

@@ -498,6 +498,8 @@ static inline const char *wifi_ps_get_config_err_code_str(int16_t err_no)
 enum wifi_ap_config_param {
 	/** Used for AP mode configuration parameter ap_max_inactivity */
 	WIFI_AP_CONFIG_PARAM_MAX_INACTIVITY = BIT(0),
+	/** Used for AP mode configuration parameter max_num_sta */
+	WIFI_AP_CONFIG_PARAM_MAX_NUM_STA = BIT(1),
 };
 
 #ifdef __cplusplus

include/zephyr/net/wifi_mgmt.h

@@ -764,6 +764,8 @@ struct wifi_ap_config_params {
 	enum wifi_ap_config_param type;
 	/** Parameter used for setting maximum inactivity duration for stations */
 	uint32_t max_inactivity;
+	/** Parameter used for setting maximum number of stations */
+	uint32_t max_num_sta;
 };
 
 #include <zephyr/net/net_if.h>

subsys/net/l2/wifi/Kconfig

@@ -111,3 +111,11 @@ config WIFI_MGMT_AP_STA_SKIP_INACTIVITY_POLL
 	  the inactivity timeout. This is useful to disconnect idle stations even
 	  if they are within the range of the AP.
 	  Note: This is only build time parameter, runtime configuration not supported.
+
+config WIFI_MGMT_AP_MAX_NUM_STA
+	int "Maximum number of stations allowed in station table"
+	range 1 2007
+	default 4
+	help
+	  Maximum number of stations allowed in station table. New stations will be
+	  rejected after the station table is full.

subsys/net/l2/wifi/wifi_mgmt.c

@@ -455,6 +455,15 @@ static int wifi_ap_config_params(uint32_t mgmt_request, struct net_if *iface,
 		return -EINVAL;
 	}
 
+	if (params->type & WIFI_AP_CONFIG_PARAM_MAX_NUM_STA) {
+		if (params->max_num_sta > CONFIG_WIFI_MGMT_AP_MAX_NUM_STA) {
+			LOG_INF("Maximum number of stations(%d) "
+				"exceeded default configured value = %d.",
+				params->max_num_sta, CONFIG_WIFI_MGMT_AP_MAX_NUM_STA);
+			return -EINVAL;
+		}
+	}
+
 	return wifi_mgmt_api->ap_config_params(dev, params);
 }
 

subsys/net/l2/wifi/wifi_shell.c

@@ -1376,12 +1376,13 @@ static int wifi_ap_config_args_to_params(const struct shell *sh, size_t argc, ch
 	struct getopt_state *state;
 	int opt;
 	static struct option long_options[] = {{"max_inactivity", required_argument, 0, 'i'},
+					       {"max_num_sta", required_argument, 0, 's'},
 					       {"help", no_argument, 0, 'h'},
 					       {0, 0, 0, 0}};
 	int opt_index = 0;
 	long val;
 
-	while ((opt = getopt_long(argc, argv, "i:h", long_options, &opt_index)) != -1) {
+	while ((opt = getopt_long(argc, argv, "i:s:h", long_options, &opt_index)) != -1) {
 		state = getopt_state_get();
 		switch (opt) {
 		case 'i':
@@ -1392,6 +1393,14 @@ static int wifi_ap_config_args_to_params(const struct shell *sh, size_t argc, ch
 			params->max_inactivity = (uint32_t)val;
 			params->type |= WIFI_AP_CONFIG_PARAM_MAX_INACTIVITY;
 			break;
+		case 's':
+			if (!parse_number(sh, &val, optarg, "max_num_sta",
+					  0, CONFIG_WIFI_MGMT_AP_MAX_NUM_STA)) {
+				return -EINVAL;
+			}
+			params->max_num_sta = (uint32_t)val;
+			params->type |= WIFI_AP_CONFIG_PARAM_MAX_NUM_STA;
+			break;
 		case 'h':
 			shell_help(sh);
 			return SHELL_CMD_HELP_PRINTED;
@@ -1955,9 +1964,10 @@ SHELL_STATIC_SUBCMD_SET_CREATE(wifi_cmd_ap,
 	SHELL_CMD_ARG(config, NULL,
 		  "Configure AP parameters.\n"
 		  "-i --max_inactivity=<time duration (in seconds)>\n"
+		  "-s --max_num_sta=<maximum number of stations>\n"
 		  "-h --help (prints help)",
 		  cmd_wifi_ap_config_params,
-		  2, 3),
+		  2, 5),
 	SHELL_SUBCMD_SET_END
 );