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How to print IP routing table with eCOS ?
- From: Sebastien Couret <sebastien dot couret at elios-informatique dot fr>
- To: ecos-discuss at sources dot redhat dot com
- Date: Wed, 05 Nov 2003 18:01:10 +0100
- Subject: [ECOS] How to print IP routing table with eCOS ?
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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