add option to ignore logoff packets

README.md

@@ -19,12 +19,17 @@ Usage of goeap_proxy:
     	interface of the AT&T ONT/WAN
   -if-wan string
     	interface of the AT&T Router
+  -ignore-logoff
+        ignore EAP-Logoff packets
   -promiscuous
     	place interfaces into promiscuous mode instead of multicast
   -syslog
     	log to syslog
 ```
 
+### Ignore Logoff
+It has been reported that some gateways such as the Pace 5268ac will send a EAPOLLogOff causing a sporadic outage. Use the `-ignore-logoff` flag if you encounter this issue. This is not needed for the BGW210. 
+
 ### Example Run
 ```
 root@OpenWrt:~# goeap_proxy -if-router eth3 -if-wan eth2
@@ -46,12 +51,11 @@ $ go build -o goeap_proxy main.go
 ```
 $ CC=/usr/local/bin/musl-gcc go build -o goeap_proxy main.go
 ```
-Note: This is useful for testing changes on router distributions that use musl without needing to go through the package process.
-**For OpenWRT**
+Note: This is useful for testing changes on router distributions that use musl without needing to go through the packaging process.
 
-Custom feed: [pyther/openwrt-feed](https://github.com/pyther/openwrt-feed)
-
-README contains insructions
+**For OpenWRT**
+Openwrt feed: [pyther/openwrt-feed](https://github.com/pyther/openwrt-feed)
+Package building instructions in README
 
 ## Other Projects
 - [jaysoffian/eap_proxy](https://github.com/jaysoffian/eap_proxy): python implementation with a primary focus on EdgeOS

main.go

@@ -53,10 +53,12 @@ func main() {
 	var rtrInt string
 	var wanInt string
 	var promiscuous bool
+	var ignoreLogoff bool
 	var version bool
 
 	flag.StringVar(&rtrInt, "if-router", "", "interface of the AT&T Router")
 	flag.StringVar(&wanInt, "if-wan", "", "interface of the AT&T ONT/WAN")
+	flag.BoolVar(&ignoreLogoff, "ignore-logoff", false, "ignore EAPOL-Logoff packets")
 	flag.BoolVar(&promiscuous, "promiscuous", false, "place interfaces into promiscuous mode instead of multicast")
 	flag.BoolVar(&version, "version", false, "display version")
 	flag.Parse()
@@ -89,12 +91,12 @@ func main() {
 	// Wait until both subroutines exit
 	fmt.Printf("proxy started. router: %s, wan: %s\n", rtrInt, wanInt)
 	quit := make(chan int)
-	go proxyPackets(rtr, wan)
-	go proxyPackets(wan, rtr)
+	go proxyPackets(rtr, wan, ignoreLogoff)
+	go proxyPackets(wan, rtr, ignoreLogoff)
 	<-quit
 }
 
-func proxyPackets(src *eapInterface, dst *eapInterface) {
+func proxyPackets(src *eapInterface, dst *eapInterface, ignoreLogoff bool) {
 	// This might break for jumbo frames
 	recvBuf := make([]byte, 1500)
 	for {
@@ -120,12 +122,14 @@ func proxyPackets(src *eapInterface, dst *eapInterface) {
 			continue
 		}
 
-			continue
-		}
-
 		//DEBUG: Print Decoded Layers
 		//fmt.Fprintf(os.Stderr, "Decoded: %v\n", decoded)
 
+		if ignoreLogoff && eapol.Type == layers.EAPOLTypeLogOff {
+			printPacketInfo(src.name, "IGNORE", eth, eapol, eap)
+			continue
+		}
+
 		// print a log message with useful information
 		printPacketInfo(src.name, dst.name, eth, eapol, eap)