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Wireshark-dev: Re: [Wireshark-dev] Out of Memory issue

From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Fri, 25 Jul 2008 15:45:21 -0700

On Jul 25, 2008, at 3:23 PM, Kumar, Hemant wrote:

Even if I comment as shown below and add a simple printf statement it fails but if I just keep the first line ep_alloc() and comment everything
With no printf addition then it works.:--

                  if (check_col(pinfo->cinfo,COL_INFO))
                  {

                      temp_str = ep_alloc(STRING_BUFFER);
printf( "[%s] %s ", message->direction, message->message_type); // g_snprintf( temp_str, sizeof(temp_str), "[%s] %s ", message->direction, message->message_type);
         //          col_add_str(pinfo->cinfo, COL_INFO, temp_str);

                  }

So that sample does, or doesn't, work?

If it doesn't work, is the code that does work

                  if (check_col(pinfo->cinfo,COL_INFO))
                  {

                      temp_str = ep_alloc(STRING_BUFFER);
// printf( "[%s] %s ", message->direction, message->message_type); // g_snprintf( temp_str, sizeof(temp_str), "[%s] %s ", message->direction, message->message_type);
         //          col_add_str(pinfo->cinfo, COL_INFO, temp_str);

                  }

or, equivalently:

                  if (check_col(pinfo->cinfo,COL_INFO))
                  {

                      temp_str = ep_alloc(STRING_BUFFER);
// g_snprintf( temp_str, sizeof(temp_str), "[%s] %s ", message->direction, message->message_type);
         //          col_add_str(pinfo->cinfo, COL_INFO, temp_str);

                  }


(i.e., "just keep the first line ep_alloc()" and "comment everything with no printf addition"?

By the way, there's a "col_add_fstr()" routine which takes a format string and an argument list, so you can just do

		if (check_col(pinfo->cinfo, COL_INFO))
		{
col_add_fstr(pinfo->cinfo, COL_INFO, "[%s] %s ", message- >direction, message->message_type);
		}

You also don't have to do

                  if (check_col(pinfo->cinfo,COL_INFO))
                  {
                        col_clear(pinfo->cinfo,COL_INFO);
                  }

if, immediately after that, you're going to set the string.