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/*
* BIRD -- *BSD Table Scanning
*
* (c) 2004 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdio.h>
#include <ctype.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <net/route.h>
#undef LOCAL_DEBUG
#define LOCAL_DEBUG
#include "nest/bird.h"
#include "nest/route.h"
#include "nest/protocol.h"
#include "nest/iface.h"
#include "lib/timer.h"
#include "lib/unix.h"
#include "lib/krt.h"
#include "lib/string.h"
static int krt_scan_fd = -1;
struct iface *
krt_temp_iface(struct krt_proto *p, char *name)
{
struct iface *i;
WALK_LIST(i, p->scan.temp_ifs)
if (!strcmp(i->name, name))
return i;
i = mb_allocz(p->p.pool, sizeof(struct iface));
strcpy(i->name, name);
add_tail(&p->scan.temp_ifs, &i->n);
return i;
}
void
krt_scan_construct(struct krt_config *c)
{
}
void
krt_scan_preconfig(struct config *c)
{
}
void
krt_scan_postconfig(struct krt_config *c)
{
}
void
krt_scan_start(struct krt_proto *x, int first)
{
init_list(&x->scan.temp_ifs);
}
void
krt_scan_shutdown(struct krt_proto *x, int last)
{
}
void
krt_sysctl_scan(struct proto *p, pool *pool, byte **buf, int *bl, int cmd)
{
byte *next;
int obl, needed, mib[6], on;
struct ks_msg *m;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = BIRD_PF;
mib[4] = cmd;
mib[5] = 0;
if( sysctl(mib, 6 , NULL , &needed, NULL, 0) < 0)
{
die("RT scan...");
}
obl = *bl;
while(needed > *bl) *bl *= 2;
while(needed < (*bl/2)) *bl /= 2;
if( (obl!=*bl) || !*buf)
{
if(*buf) mb_free(*buf);
if( (*buf = mb_alloc(pool, *bl)) == NULL ) die("RT scan buf alloc");
}
on = needed;
if( sysctl(mib, 6 , *buf, &needed, NULL, 0) < 0)
{
if(on != needed) return; /* The buffer size changed since last sysctl */
die("RT scan 2");
}
for (next = *buf; next < (*buf + needed); next += m->rtm.rtm_msglen)
{
m = (struct ks_msg *)next;
krt_read_msg(p, m, 1);
}
}
void
krt_scan_fire(struct krt_proto *p)
{
static byte *buf = NULL;
static int bl = 32768;
krt_sysctl_scan((struct proto *)p , p->krt_pool, &buf, &bl, NET_RT_DUMP);
}
void
krt_if_scan(struct kif_proto *p)
{
static byte *buf = NULL;
static int bl = 4096;
struct proto *P = (struct proto *)p;
if_start_update();
krt_sysctl_scan(P, P->pool, &buf, &bl, NET_RT_IFLIST);
if_end_update();
}
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