Add SourceIP in NetworkConfig (#4566)

Co-authored-by: Abdelmalik KERBADOU <abdelmalik.kerbadou@intrinsec.com>
Co-authored-by: Sandeep Singh <sandeep@projectdiscovery.io>

lib/config.go

@@ -227,7 +227,7 @@ type NetworkConfig struct {
 	TrackError        []string // Adds given errors to max host error watchlist
 	DisableMaxHostErr bool     // Disable max host error optimization (Hosts are not skipped even if they are not responding)
 	Interface         string   // Interface to use for network scan
-
+	SourceIP          string   // SourceIP sets custom source IP address for network requests
 }
 
 // WithNetworkConfig allows setting network config options
@@ -241,6 +241,7 @@ func WithNetworkConfig(opts NetworkConfig) NucleiSDKOptions {
 		e.opts.LeaveDefaultPorts = opts.LeaveDefaultPorts
 		e.hostErrCache = hosterrorscache.New(opts.MaxHostError, hosterrorscache.DefaultMaxHostsCount, opts.TrackError)
 		e.opts.Interface = opts.Interface
+		e.opts.SourceIP = opts.SourceIP
 		return nil
 	}
 }