From 11dbea0302e8fff7c2a2fcacf44544c371cac937 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Sat, 16 Jan 2021 13:41:46 +0100
Subject: [PATCH] LOGln now logs to a central syslog server, if available.

---
 include/config.sample.h |  3 +++
 include/syslog.h        |  8 ++++++++
 include/tools.h         | 11 +++++++++--
 src/main.cpp            |  3 +++
 src/syslog.cpp          | 17 +++++++++++++++++
 src/wifi.cpp            |  7 ++++---
 6 files changed, 44 insertions(+), 5 deletions(-)
 create mode 100644 include/syslog.h
 create mode 100644 src/syslog.cpp

diff --git a/include/config.sample.h b/include/config.sample.h
index 5075afb..41332c1 100644
--- a/include/config.sample.h
+++ b/include/config.sample.h
@@ -39,4 +39,7 @@
 #define MQTT_TOPIC_STATE_LONG "espleaf/state_long"
 #define MQTT_TOPIC_COMMANDS "esplead/cmnd"
 
+#define SYSLOG_HOST "..."
+#define SYSLOG_PORT 514
+
 //#define TEST_MODE
\ No newline at end of file
diff --git a/include/syslog.h b/include/syslog.h
new file mode 100644
index 0000000..3b5ab9c
--- /dev/null
+++ b/include/syslog.h
@@ -0,0 +1,8 @@
+#pragma once
+
+#include <Arduino.h>
+#include <WiFiUdp.h>
+
+#ifdef SYSLOG_HOST
+	void syslog(String msg, uint8_t severity=7);
+#endif
\ No newline at end of file
diff --git a/include/tools.h b/include/tools.h
index d0b247d..14def8f 100644
--- a/include/tools.h
+++ b/include/tools.h
@@ -1,8 +1,15 @@
 #pragma once
 #include "my_fastled.h"
+#include "syslog.h"
 
-#define LOG(...) Serial.printf(__VA_ARGS__)
-#define LOGln(...) Serial.printf(__VA_ARGS__); Serial.println()
+//#define LOG(...) Serial.printf(__VA_ARGS__)
+//#define LOGln(...) Serial.printf(__VA_ARGS__); Serial.println()
+
+#ifdef SYSLOG_HOST
+	#define LOGln(...) { char buffer[512]; snprintf(buffer, 512, __VA_ARGS__); syslog(buffer); Serial.println(buffer);}
+#else
+	#define LOGln(...) Serial.printf(__VA_ARGS__); Serial.println()
+#endif
 
 
 void clear_leds();
diff --git a/src/main.cpp b/src/main.cpp
index 6f8961d..6054cd1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -10,6 +10,7 @@
 #include "prototypes.h"
 #include "mqtt.h"
 #include "state.h"
+#include "syslog.h"
 
 std::vector<Node*> nodes;
 std::list<Edge*> edges;
@@ -173,6 +174,8 @@ void setup() {
 		delay(250);
 		show_status(0);
 	#endif
+
+	syslog("Setup done.");
 }
 
 void loop() {
diff --git a/src/syslog.cpp b/src/syslog.cpp
new file mode 100644
index 0000000..0152c02
--- /dev/null
+++ b/src/syslog.cpp
@@ -0,0 +1,17 @@
+#include "syslog.h"
+#include "config.h"
+
+#ifdef SYSLOG_HOST
+	void syslog(String msg, uint8_t severity) {
+		uint8_t facility = 16; // local0
+		if (severity > 7) severity = 7;
+		WiFiUDP udp;
+
+		udp.beginPacket(SYSLOG_HOST, SYSLOG_PORT);
+		udp.write("<");
+		udp.write(String(facility * 8 + severity).c_str());
+		udp.write(">1 - " OTA_HOSTNAME " espleaf 1 1 - ");
+		udp.write(msg.c_str());
+		udp.endPacket();
+	}
+#endif
\ No newline at end of file
diff --git a/src/wifi.cpp b/src/wifi.cpp
index 5f50473..1fca7e5 100644
--- a/src/wifi.cpp
+++ b/src/wifi.cpp
@@ -2,13 +2,14 @@
 #include "tools.h"
 
 void wifi_setup() {
-    LOG("Connecting to WiFi %s...", WIFI_SSID);
+    Serial.printf("Connecting to WiFi %s...", WIFI_SSID);
     WiFi.mode(WIFI_STA);
     WiFi.begin(WIFI_SSID, WIFI_PASS);
     while (WiFi.status() != WL_CONNECTED) {
-        LOG(".");
+        Serial.print(".");
         delay(300);
     }
-    LOGln(" Connected as %s", WiFi.localIP().toString().c_str());
+    Serial.println();
+    LOGln("Connected as %s", WiFi.localIP().toString().c_str());
     random16_add_entropy(micros());
 }
\ No newline at end of file