[Clamav-devel] cl_scanbuff problems

[Brandon Mercer]

Hello Everyone,
I've been reading over your API docs and I have some questions about 
cl_scanbuff.  What I'm doing is creating a pop3 email proxy scanner for 
OpenBSD.  I've got things working where it scans the messages when I go 
to retrieve them, but things "freeze/hang" when I send a virus message 
through.  Any help would be appreciated, here is my code:

#include "pop3-gw.h"
#include <clamav.h>
void relay_data(int first_filedes, int second_filedes, int maxwait, int 
*in, int *out) {
       fd_set  master, copy;
   struct timeval    deadline;
   int logged_in = TRUE;
   unsigned int count;
   char buf[MAX_IO_LEN];
  
   /* new stuff for antivirus */
   int fd, ret, no = 0;
   struct cl_node *root = NULL;
   const char **virname;
   /* end new stuff for antivirus */

   FD_ZERO(&master);
   FD_SET(first_filedes, &master);
   FD_SET(second_filedes, &master);   
  
   /* other things added for antivirus stuff */
   // load up your non-antivirus PC definition databases
   if ((ret = cl_loaddbdir(cl_retdbdir(), &root, &no))) {
       printf("cl_loaddbdir: %s\n", cl_perror(ret));
       close(fd);
       exit(2);
   }
   // Build the final trie... per the docs, dunno what the hell this is
   if((ret = cl_buildtrie(root)))
       printf("cl_buildtrie() error: %s\n", cl_strerror(ret));
   /* end of other things added for antivirus stuff */
  
   while (logged_in == TRUE) {
       syslog(LOG_PRIO, "ANYTHING");
  
       memcpy(&copy, &master, sizeof(fd_set));  /* select() trashes copy */
       deadline.tv_sec = maxwait;
       deadline.tv_usec = 0;

       if (select(MAX(first_filedes, second_filedes)+1, &copy, (fd_set 
*)NULL, (fd_set *)NULL, &deadline) <= 0) {
#ifdef DEBUG
           syslog(LOG_PRIO, "Network timeout signal after %d seconds 
while relaying data", maxwait);
#endif
           logged_in = FALSE;
       }
       else {
           if (FD_ISSET(first_filedes, &copy)) {
               if ((count = read(first_filedes, buf, sizeof(buf))) <= 0)
                   logged_in = FALSE;
               else
                   if (writen(second_filedes, buf, count, maxwait) == 
count)
                       (*out) += count;
                   else
                       logged_in = FALSE;
           }
           if (FD_ISSET(second_filedes, &copy) && logged_in == TRUE) {
               if ((count = read(second_filedes, buf, sizeof(buf))) <= 0)
                   logged_in = FALSE;
               else {
                   /* Virus Scanning Section */
                   syslog(LOG_PRIO, "Just scanning for virus");
                  
                   if ((ret = cl_scanbuff(buf, count, virname, root)) 
== CL_VIRUS)
                   syslog(LOG_PRIO, "OHMYGO you've got a virus!");
                   else if (ret == CL_CLEAN) {
                   syslog(LOG_PRIO, "No sassypool for viruses found");
                   }
                   else {
                   syslog(LOG_PRIO, "We're screwed");
                   }
                   /* End Virus Scanning Stuff */

                   if (writen(first_filedes, buf, count, maxwait) == count)
                   (*in) += count;
                   else
                   logged_in = FALSE;
                  
               }
           }
       }
   }
}

Thanks again,
Brandon
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