net: wifi: Check for mandatory args

Even though we are passing mandatory args from the shell registration,
due to use of getopt the check can be bypassed without the hyphenated
options.

So, enforce and fail if mandatory parameters aren't passed through
getopt.

(cherry picked from commit b29dff0)

Original-Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>
GitOrigin-RevId: b29dff0
Change-Id: I4cbc49f118f946879775733f3c14d53778fdab91
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/5482304
Tested-by: Dawid Niedźwiecki <dawidn@google.com>
Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Reviewed-by: Dawid Niedźwiecki <dawidn@google.com>
Commit-Queue: Dawid Niedźwiecki <dawidn@google.com>

subsys/net/l2/wifi/wifi_shell.c

@@ -574,6 +574,16 @@ static int __wifi_args_to_params(const struct shell *sh, size_t argc, char *argv
 	if (params->psk && !secure_connection) {
 		PR_WARNING("Passphrase provided without security configuration\n");
 	}
+
+	if (!params->ssid) {
+		PR_ERROR("SSID not provided\n");
+		return -EINVAL;
+	}
+
+	if (iface_mode == WIFI_MODE_AP && params->channel == WIFI_CHANNEL_ANY) {
+		PR_ERROR("Channel not provided\n");
+		return -EINVAL;
+	}
 	return 0;
 }