int
sys_rtlist(struct lwp *l, const struct sys_rtlist_args *uap, register_t *retval)
{
int error;
size_t len;
(void)l;
if ( SCARG(uap, buf) != NULL ) {
error = ChkSpaceRW(SCARG(uap, buf), SCARG(uap, bufsz));
if ( error < E_OK ) {
return EFAULT;
}
}
len = SCARG(uap, bufsz);
error = sysctl_rtable(SCARG(uap,af), SCARG(uap,cmd), SCARG(uap,flags),
SCARG(uap,buf), &len );
if (error == 0) {
*retval = len;
}
return error;
}
int flushroutes (void)
{
int s;
size_t needed;
int mib[3], rlen, seqno;
char *buf, *next, *lim;
register struct rt_msghdr *rtm;
if ( (s = socket (PF_ROUTE, SOCK_RAW, 0)) < 0)
{
#ifdef DHCPC_DEBUG
printf ("Warning: socket() error in flushroutes()");
#endif
return (-1);
}
shutdown(s, 0);
mib[0] = AF_INET;
mib[1] = NET_RT_DUMP;
mib[2] = 0; /* no flags */
/* Retrieve the size of the routing table and allocate needed memory. */
if (sysctl_rtable (mib, 3, NULL, &needed, NULL, 0) < 0)
{
#ifdef DHCPC_DEBUG
printf ("Warning: sysctl() error in flushroutes()");
#endif
close (s);
return (-1);
}
if ( (buf = calloc(1, needed)) == NULL)
{
#ifdef DHCPC_DEBUG
printf ("Warning: calloc() error in flushroutes()");
#endif
close (s);
return(-1);
}
/* Copy the current routing table to the allocated buffer. */
if (sysctl_rtable(mib, 3, buf, &needed, NULL, 0) < 0)
{
#ifdef DHCPC_DEBUG
printf("Warning: sysctl() error in flushroutes()");
#endif
free(buf);
close(s);
return(-1);
}
lim = buf + needed;
seqno = 0;
/* Delete each route contained in the routing tables. */
for (next = buf; next < lim; next += rtm->rtm_msglen)
{
rtm = (struct rt_msghdr *) next;
if ((rtm->rtm_flags & (RTF_GATEWAY | RTF_LLINFO)) == 0)
continue;
rtm->rtm_type = RTM_DELETE;
rtm->rtm_seq = seqno;
rlen = write(s, next, rtm->rtm_msglen);
if (rlen < (int)rtm->rtm_msglen)
break;
seqno++;
}
free(buf);
close(s);
return(0);
}
