AfRApay/AfRApay.MateCard/src/wifiFix.cpp

#include <WiFi.h>
#include <lwip/sockets.h>
#include "wifiFix.h"

#define WIFI_CLIENT_FLUSH_BUFFER_SIZE    (1024)

void WiFiClientFixed::flush() {
	int res;
	size_t a = available();
	if (!a) {
		return;//nothing to flush
	}
	auto* buf = (uint8_t *) malloc(WIFI_CLIENT_FLUSH_BUFFER_SIZE);
	if (!buf) {
		return;//memory error
	}
	while (a) {
		// override broken WiFiClient flush method, ref https://github.com/espressif/arduino-esp32/issues/6129#issuecomment-1237417915
		res = read(buf, min(a, (size_t)WIFI_CLIENT_FLUSH_BUFFER_SIZE));
		if (res < 0) {
			log_e("fail on fd %d, errno: %d, \"%s\"", fd(), errno, strerror(errno));
			stop();
			break;
		}
		a -= res;
	}
	free(buf);
}