Remove nmap scanner in favor of internal arp scanner

go.mod

@@ -3,7 +3,6 @@ module github.com/robgonnella/ops
 go 1.19
 
 require (
-	github.com/Ullaakut/nmap/v3 v3.0.2
 	github.com/apenella/go-ansible v1.1.7
 	github.com/gdamore/tcell/v2 v2.6.0
 	github.com/golang/mock v1.6.0
@@ -56,7 +55,6 @@ require (
 	github.com/stretchr/objx v0.5.0 // indirect
 	github.com/subosito/gotenv v1.4.2 // indirect
 	golang.org/x/net v0.10.0 // indirect
-	golang.org/x/sync v0.1.0 // indirect
 	golang.org/x/sys v0.9.0 // indirect
 	golang.org/x/term v0.9.0 // indirect
 	golang.org/x/text v0.10.0 // indirect

go.sum

@@ -40,8 +40,6 @@ dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/Ullaakut/nmap/v3 v3.0.2 h1:AqQ9UYxLWzYZTv/rzMzVn8+LIgFGxGi+4h+3pDkFOII=
-github.com/Ullaakut/nmap/v3 v3.0.2/go.mod h1:dd5K68P7LHc5nKrFwQx6EdTt61O9UN5x3zn1R4SLcco=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/apenella/go-ansible v1.1.7 h1:seJcEZbRjALS6RjbO5UjPQTHpCnnaRADmCCo0MT26BU=
@@ -488,8 +486,6 @@ golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
-golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=

internal/discovery/arpscan.go

@@ -128,6 +128,11 @@ func (s *ARPScanner) handleARPLayer(arp *layers.ARP) {
 	ip := net.IP(arp.SourceProtAddress)
 	mac := net.HardwareAddr(arp.SourceHwAddress)
 
+	if !util.SliceIncludes(s.targets, ip.String()) {
+		// not an arp request we care about
+		return
+	}
+
 	s.mux.Lock()
 	s.arpMap[ip.String()] = mac
 	s.mux.Unlock()