Hi,

If you call plugin_if_goto_frame when there is no capture file loaded you get 
an Protection Exception in cf_goto_frame (in file.c).

The code is:

gboolean
cf_goto_frame(capture_file *cf, guint fnumber)
{
  frame_data *fdata;

  fdata = frame_data_sequence_find(cf->frames, fnumber);   // *** problem 
occurs here as cf is NULL

  if (fdata == NULL) {
    /* we didn't find a packet with that packet number */
    statusbar_push_temporary_msg("There is no packet number %u.", fnumber);

The problem can be avoided by changing the code to this:

gboolean
cf_goto_frame(capture_file *cf, guint fnumber)
{
  frame_data *fdata;

  if (cf == NULL) {
                 /* we don't have a loaded capture file */
                 statusbar_push_temporary_msg("There is no file loaded");
                 return FALSE;   /* we failed to go to that packet */
  }
  else
  {
                 fdata = frame_data_sequence_find(cf->frames, fnumber);
  }

  if (fdata == NULL) {
    /* we didn't find a packet with that packet number */
    statusbar_push_temporary_msg("There is no packet number %u.", fnumber);
  .
  .

I've tested the above and it seems to work OK.

Is this acceptable to be reported as a bug or is the view that I should have 
checked there was a capture file loaded before I made the call?

Thanks and regards...Paul


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