Initial network ping sample (ESP8266 only).

Sming/Arch/Esp8266/Components/esp-open-lwip/component.mk

@@ -53,7 +53,8 @@ COMPONENT_SRCFILES		:= \
 	lwip/core/ipv4/ip_frag.c \
 	lwip/netif/etharp.c \
 	\
-	lwip/app/dhcpserver.c
+	lwip/app/dhcpserver.c \
+	lwip/app/ping.c
 
 ifeq ($(ENABLE_ESPCONN),1)
 	COMPONENT_SRCFILES += \

samples/Network_Ping/Makefile

@@ -0,0 +1,9 @@
+#####################################################################
+#### Please don't change this file. Use component.mk instead ####
+#####################################################################
+
+ifndef SMING_HOME
+$(error SMING_HOME is not set: please configure it as an environment variable)
+endif
+
+include $(SMING_HOME)/project.mk

samples/Network_Ping/README.rst

@@ -0,0 +1,4 @@
+Network Ping
+============
+
+Sample demonstrating the usage of a network ping to check for connectivity issues.

samples/Network_Ping/app/application.cpp

@@ -0,0 +1,98 @@
+#include <SmingCore.h>
+extern "C" {
+#include <lwip/app/ping.h>
+}
+
+// If you want, you can define WiFi settings globally in Eclipse Environment Variables
+#ifndef WIFI_SSID
+#define WIFI_SSID "PleaseEnterSSID" // Put your SSID and Password here
+#define WIFI_PWD "PleaseEnterPass"
+#endif
+
+namespace
+{
+ping_option pingOptions;
+uint8_t failedAttempts;
+constexpr uint8_t PING_COUNT = 3;
+constexpr uint8_t MAX_FAILED_ATTEMTPS = 5;
+constexpr uint8_t PING_INTERVAL_SECONDS = 10;
+constexpr uint8_t RESTART_DELAY_SECONDS = 2;
+
+Timer procTimer;
+
+void ping(uint32 ip);
+
+void pingTask()
+{
+	ping(IpAddress("8.8.8.8")); // ping Google DNS servers
+}
+
+void onSent(void* arg, void* pdata)
+{
+	ping_resp* response = reinterpret_cast<ping_resp*>(pdata);
+
+	if(response == nullptr) {
+		debug_e("Invalid onSent call");
+		return;
+	}
+
+	Serial.printf("Ping sent. Total failed attempts: %d.\n", failedAttempts);
+	if(failedAttempts / response->total_count > MAX_FAILED_ATTEMTPS) {
+		debug_d("Scheduling system restart in %d seconds.", RESTART_DELAY_SECONDS);
+		// schedule restart
+		System.restart(RESTART_DELAY_SECONDS * 1000);
+		return;
+	}
+
+	debug_d("Scheduling another ping in %d seconds", PING_INTERVAL_SECONDS);
+	procTimer.initializeMs(PING_INTERVAL_SECONDS * 1000, pingTask).startOnce();
+}
+
+void onReceived(void* arg, void* pdata)
+{
+	ping_resp* response = reinterpret_cast<ping_resp*>(pdata);
+	if(response == nullptr) {
+		debug_e("Invalid onReceived call");
+		return;
+	}
+
+	Serial.printf("Ping received. Sequence: %d, Success: %d, Elapsed time: %d", response->seqno,
+				  response->ping_err == 0, response->total_time);
+	Serial.println();
+
+	if(response->ping_err) {
+		failedAttempts++;
+	} else {
+		failedAttempts = 0;
+	}
+}
+
+void ping(uint32_t ip)
+{
+	debug_d("Ping IP: %s", IpAddress(ip).toString().c_str());
+	pingOptions.ip = ip;
+	pingOptions.count = PING_COUNT;
+	pingOptions.recv_function = onReceived;
+	pingOptions.sent_function = onSent;
+	ping_start(&pingOptions);
+}
+
+void connectOk(IpAddress ip, IpAddress mask, IpAddress gateway)
+{
+	debug_d("Scheduling initial ping in 1 second.");
+	procTimer.initializeMs(1000, pingTask).startOnce();
+}
+
+} // namespace
+
+void init()
+{
+	Serial.begin(SERIAL_BAUD_RATE);
+	Serial.systemDebugOutput(true);
+
+	// Setup the WIFI connection
+	WifiStation.enable(true);
+	WifiStation.config(WIFI_SSID, WIFI_PWD);
+
+	WifiEvents.onStationGotIP(connectOk);
+}

samples/Network_Ping/component.mk

@@ -0,0 +1,2 @@
+COMPONENT_DEPENDS := Network
+COMPONENT_SOC := esp8266