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authorMartin Mares <mj@ucw.cz>1998-10-19 19:52:29 +0200
committerMartin Mares <mj@ucw.cz>1998-10-19 19:52:29 +0200
commit08045252553478457f923a9f941675df9992f507 (patch)
treecf34d40c0b6f3fa0697cf5164d64077eb1d849ce /sysdep/linux
parent567e6c62208d3bb05b58b8ed08c2be29d6542f2b (diff)
downloadbird-08045252553478457f923a9f941675df9992f507.tar
bird-08045252553478457f923a9f941675df9992f507.zip
Basic kernel routing table syncing implemented. Learning of routes installed
by other programs or the kernel itself is not supported yet, but it's not needed for development of other protocols.
Diffstat (limited to 'sysdep/linux')
-rw-r--r--sysdep/linux/krt-scan.c49
1 files changed, 44 insertions, 5 deletions
diff --git a/sysdep/linux/krt-scan.c b/sysdep/linux/krt-scan.c
index efc8e93..1b00636 100644
--- a/sysdep/linux/krt-scan.c
+++ b/sysdep/linux/krt-scan.c
@@ -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);
@@ -146,14 +151,47 @@ krt_scan_proc(void)
}
static void
-krt_scan_fire(timer *t)
+krt_prune(void)
{
- struct krt_proto *x = t->data;
- SCANOPT;
+ struct rtable *t = &master_table;
+ struct fib_node *f;
- DBG("Scanning kernel table...\n");
- if (!krt_scan_proc())
+ 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)
+{
+ 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? */
}