new: new -pcap-buf-size option to set a custom pcap buffer size (closes

#896)

core/options.go

@@ -1,6 +1,8 @@
 package core
 
-import "flag"
+import (
+ "flag"
+)
 
 type Options struct {
  InterfaceName *string
@@ -18,6 +20,7 @@ type Options struct {
  MemProfile *string
  CapletsPath *string
  Script *string
+ PcapBufSize *int
 }
 
 func ParseOptions() (Options, error) {
@@ -37,6 +40,7 @@ func ParseOptions() (Options, error) {
  MemProfile: flag.String("mem-profile", "", "Write memory profile to `file`."),
  CapletsPath: flag.String("caplets-path", "", "Specify an alternative base path for caplets."),
  Script: flag.String("script", "", "Load a session script."),
+ PcapBufSize: flag.Int("pcap-buf-size", -1, "PCAP buffer size, leave to 0 for the default value."),
  }
 
  flag.Parse()

modules/wifi/wifi.go

@@ -568,7 +568,7 @@ func (mod *WiFiModule) Configure() error {
  if mod.handle, err = network.CaptureWithOptions(ifName, opts); err == nil {
  // we're done
  break
- } else if retry == 0 /* && err.Error() == ErrIfaceNotUp */ {
+ } else if retry == 0 && err.Error() == ErrIfaceNotUp {
  // try to bring interface up and try again
  mod.Info("interface %s is down, bringing it up ...", ifName)
  if err := network.ActivateInterface(ifName); err != nil {

session/session.go

@@ -127,6 +127,10 @@ func New() (*Session, error) {
  }
  }
 
+ if bufSize := *s.Options.PcapBufSize; bufSize != -1 {
+ network.CAPTURE_DEFAULTS.Bufsize = bufSize
+ }
+
  if s.Env, err = NewEnvironment(*s.Options.EnvFile); err != nil {
  return nil, err
  }