[ECOS] How to print IP routing table with eCOS ?

Sebastien Couret sebastien.couret@elios-informatique.fr
Wed Nov 5 16:00:00 GMT 2003


Hello,

I.m trying to get the routing tables from the FreeBSD IP stack ported to eCOS.

The API show_network_tables() just stall my software and display nothing.

I.ve tried by the use of the sysctl() API (option checked in FreeBSD configuration) whith the following code :

int GetRoutes(void)
{
 int mib[6];
 size_t needed=0;		
 char *buf = NULL;
 char *next=NULL;
 char *lim = NULL;
 struct sockaddr *sa=NULL;
 struct rt_msghdr *rtm=NULL;

 mib[0] = CTL_NET;
 mib[1] = PF_ROUTE;
 mib[2] = 0;
 mib[3] = 0;
 mib[4] = NET_RT_DUMP;
 mib[5] = 0;
 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)	{
  LOG(LOG_ERR,"Route sysctl");
  return(-1);
 }
 LOG(LOG_INFO,.Free space needed : %d\n",needed);
 if (needed > 0) 
 {
  if ((buf = malloc(needed)) == 0)
  {
   LOG(LOG_ERR,"out of space (%i octets)\n",needed);
   return(-1);
  }
  if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
  {
   LOG(LOG_ERR,"sysctl of routing table");
   return(-1);
  }
  lim  = buf + needed;
 } // fin du if needed

 LOG(LOG_INFO,"Routing tables\n");

 if (buf) 
 {
  LOG(LOG_INFO,"Here comes the routing table\n");
  for (next = buf; next < lim; next += rtm->rtm_msglen)
  {
   rtm = (struct rt_msghdr *)next;
   sa = (struct sockaddr *)(rtm + 1);
   if (sa->sa_family != AF_INET)
	 continue;
   LOG(LOG_INFO,"Here.s one route\n");
	//p_rtentry(rtm);
  }   free(buf);
 } 
 return(0);
}

This doesn.t work because sysctl always set needed to 0 even if routes have been added to the routing tables.
Someone got a clue ?

Thanks for your help.



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