Re: Dynamic Preprocessor does not alert and capture packet

[Big Whale <d0lph1n98 () yahoo com>]

Are you sure? It worked in my machine. Well if it's bothering you, you can just commented out that function as it is 
useless for now.
 


     On Thursday, July 9, 2015 10:51 PM, Hui cao <huica () cisco com> wrote:
   

  Try to run gdb if you have the binary, and set breakpoint at ModSecProcess(), and step through. Here are steps to use 
gdb (http://cs.baylor.edu/~donahoo/tools/gdb/tutorial.html)
 
 FYI...your code won't compile. You have the following function defined inside function ModSecProcess(void *pkt, void 
*context). 
 
 void removeSubstr(char *string, char *sub) {
         char *match = string;
         int len = strlen(sub);
         while((match = strstr(match, sub))) {
             *match = '\0';
             strcat(string, match+len);
             match++;
         }
     }
 
 Best,
 Hui.
 On 07/09/2015 10:41 AM, Big Whale wrote:
  
 
 The preprocessor can be loaded but in ModSecProcess() function, the preprocessor supposed to output the alert if the 
packet matched port 80. But it does not works, so i thought the problem could be the preprocessor rules. I already 
tried config autogenerate_preprocessor_decoder_rules in snort.conf and define the preprocessor alert generator id in 
the preprocessor_rules. Yet everything does not seems to work like it supposed to. I am building my preprocessor based 
on SSH preprocessor. Why don't you try compile and run it locally so you can experience what kind of problem it is. 
 
 
       On Thursday, July 9, 2015 8:56 PM, Hui cao <huica () cisco com> wrote:
   
 
    Hi Big Whale,
 
 Can you describe in detail what works and what not? Which decoder rule? Have you seen the rule get triggered in your 
preprocessor? Again, SSH preprocessor has example how to generate a preprocessor alert.
 
 Best,
 Hui.
 
  On 07/09/2015 12:46 AM, Big Whale wrote:
  
 
      I already add "config autogenerate_preprocessor_decoder_rules" in my snort.conf file and put the plugin's alerts 
in the preprocessor.rules and gen-msg.map. But still no alert from my preprocessor. The preprocessor loaded correctly.
   
  
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