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Basic kernel routing table syncing implemented. Learning of routes installed

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by other programs or the kernel itself is not supported yet, but it's not
needed for development of other protocols.
This commit is contained in:
Martin Mares
1998-10-19 17:52:29 +00:00
parent 567e6c6220
commit 0804525255
3 changed files with 136 additions and 9 deletions
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51
sysdep/linux/krt-scan.c
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@@ -26,6 +26,8 @@
static int krt_scan_fd = -1;
/* FIXME: Filtering */
static void
krt_parse_entry(byte *e)
{
@@ -98,6 +100,8 @@ krt_parse_entry(byte *e)
if (!(flags & RTF_GATEWAY)) /* It's a device route */
return;
#endif
DBG("krt_parse_entry: kernel reporting unknown route %I/%d\n", dest, masklen);
/* FIXME: should be able to learn kernel routes */
net->n.flags |= KRF_UPDATE;
}
}
@@ -108,6 +112,7 @@ krt_scan_proc(void)
byte buf[32768];
int l, seen_hdr;
DBG("Scanning kernel table...\n");
if (krt_scan_fd < 0)
{
krt_scan_fd = open("/proc/net/route", O_RDONLY);
@@ -145,15 +150,48 @@ krt_scan_proc(void)
return 1;
}
static void
krt_prune(void)
{
struct rtable *t = &master_table;
struct fib_node *f;
DBG("Pruning routes...\n");
while (t && t->tos)
t = t->sibling;
if (!t)
return;
FIB_WALK(&t->fib, f)
{
net *n = (net *) f;
switch (f->flags)
{
case KRF_UPDATE:
DBG("krt_prune: removing %I/%d\n", n->n.prefix, n->n.pxlen);
krt_remove_route(n, NULL);
/* Fall-thru */
case 0:
if (n->routes)
{
DBG("krt_prune: reinstalling %I/%d\n", n->n.prefix, n->n.pxlen);
krt_add_route(n, n->routes);
}
break;
case KRF_SEEN:
break;
default:
die("krt_prune: invalid route status");
}
f->flags = 0;
}
FIB_WALK_END;
}
static void
krt_scan_fire(timer *t)
{
struct krt_proto *x = t->data;
SCANOPT;
DBG("Scanning kernel table...\n");
if (!krt_scan_proc())
return;
if (krt_scan_proc())
krt_prune();
}
void
@@ -185,4 +223,5 @@ krt_scan_shutdown(struct krt_proto *x)
SCANOPT;
tm_stop(p->timer);
/* FIXME: Remove all krt's? */
}