fix: syn.scanner now uses a dedicated pcap handle to prevent deadlocks and improve performances

modules/syn_scan/syn_scan_parsers.go

@@ -0,0 +1,47 @@
+package syn_scan
+
+import (
+	"fmt"
+	"strconv"
+
+	"github.com/evilsocket/islazy/str"
+	"github.com/malfunkt/iprange"
+)
+
+func (mod *SynScanner) parseTargets(arg string) error {
+	if list, err := iprange.Parse(arg); err != nil {
+		return fmt.Errorf("error while parsing IP range '%s': %s", arg, err)
+	} else {
+		mod.addresses = list.Expand()
+	}
+	return nil
+}
+
+func (mod *SynScanner) parsePorts(args []string) (err error) {
+	argc := len(args)
+	mod.stats.totProbes = 0
+	mod.stats.doneProbes = 0
+	mod.startPort = 1
+	mod.endPort = 65535
+
+	if argc > 1 && str.Trim(args[1]) != "" {
+		if mod.startPort, err = strconv.Atoi(str.Trim(args[1])); err != nil {
+			return fmt.Errorf("invalid start port %s: %s", args[1], err)
+		} else if mod.startPort > 65535 {
+			mod.startPort = 65535
+		}
+		mod.endPort = mod.startPort
+	}
+
+	if argc > 2 && str.Trim(args[2]) != "" {
+		if mod.endPort, err = strconv.Atoi(str.Trim(args[2])); err != nil {
+			return fmt.Errorf("invalid end port %s: %s", args[2], err)
+		}
+	}
+
+	if mod.endPort < mod.startPort {
+		return fmt.Errorf("end port %d is greater than start port %d", mod.endPort, mod.startPort)
+	}
+
+	return
+}