feat(minion): add print MAC address

1 files changed, 54 insertions, 0 deletions

diff --git a/minion/src/wifi_module.cpp b/minion/src/wifi_module.cpp
index 953e9fa..8a2dd6a 100644
--- a/minion/src/wifi_module.cpp
+++ b/minion/src/wifi_module.cpp
@@ -254,6 +254,60 @@ auto WiFiModule::get_local_ip(char *local_ip_out) noexcept -> const char *
 	return local_ip_out;
 }
 
+auto WiFiModule::get_mac_address(char *mac_address_out) noexcept -> const char *
+{
+	const auto send_success = _send_serial("AT+CIFSR");
+
+	if (!send_success)
+	{
+		return mac_address_out;
+	}
+
+	auto *buf = util::malloc<char>(strlen(mac_address_out) + 1U);
+
+	if (buf == nullptr)
+	{
+		strcpy(mac_address_out, "Memory allocation failure");
+		return mac_address_out;
+	}
+
+	strcpy(buf, "");
+
+	const auto response_status = _read(10000U, buf);
+
+	if (response_status != WiFiModuleResponseStatus::OK)
+	{
+		free(buf);
+
+		sprintf(
+			mac_address_out,
+			"Response status was not OK. Was %d",
+			static_cast<int>(response_status)
+		);
+
+		return mac_address_out;
+	}
+
+	const auto stamac_title = "CIFSR:STAMAC,\"";
+
+	auto mac_address_start = strstr(buf, stamac_title);
+
+	if (mac_address_start == nullptr)
+	{
+		free(buf);
+		strcpy(mac_address_out, "Response parsing error");
+		return mac_address_out;
+	}
+
+	mac_address_start += strlen(stamac_title);
+
+	util::substr(mac_address_start, mac_address_start + 17U, mac_address_out);
+
+	free(buf);
+
+	return mac_address_out;
+}
+
 auto WiFiModule::read_incoming_request() noexcept -> HTTPRequest
 {
 	char request_prefix[] = "+IPD,";