From 980ffedbb04bf3beedf147fc7dfed40cdbf968aa Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sun, 6 Dec 1998 17:40:42 +0000
Subject: Kernel syncer is now configurable. It will probably need some more
 options, but at least basic tuning is possible now.

---
 bird.conf               |  6 ++++++
 sysdep/linux/Modules    |  1 +
 sysdep/linux/krt-scan.Y | 33 +++++++++++++++++++++++++++++++++
 sysdep/linux/krt-scan.c | 13 +++++++------
 sysdep/linux/krt-scan.h |  1 +
 sysdep/unix/Modules     |  1 +
 sysdep/unix/krt.Y       | 34 ++++++++++++++++++++++++++++++++++
 sysdep/unix/krt.h       |  2 ++
 sysdep/unix/main.c      |  2 +-
 sysdep/unix/sync-rt.c   |  3 +++
 10 files changed, 89 insertions(+), 7 deletions(-)
 create mode 100644 sysdep/linux/krt-scan.Y
 create mode 100644 sysdep/unix/krt.Y

diff --git a/bird.conf b/bird.conf
index 6797aee..80c4f51 100644
--- a/bird.conf
+++ b/bird.conf
@@ -17,3 +17,9 @@ protocol device {
 #	disabled
 #	interface "-eth*", "*"
 }
+
+protocol kernel {
+#	disabled
+	learn;			# Learn all routes from the kernel
+	scan time 10;		# Scan kernel tables every 10 seconds
+}
diff --git a/sysdep/linux/Modules b/sysdep/linux/Modules
index 5562ab2..6244479 100644
--- a/sysdep/linux/Modules
+++ b/sysdep/linux/Modules
@@ -1,2 +1,3 @@
 krt-scan.c
 krt-scan.h
+krt-scan.Y
diff --git a/sysdep/linux/krt-scan.Y b/sysdep/linux/krt-scan.Y
new file mode 100644
index 0000000..fcdcfe6
--- /dev/null
+++ b/sysdep/linux/krt-scan.Y
@@ -0,0 +1,33 @@
+/*
+ *	BIRD -- Linux Kernel Syncer Configuration
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+CF_HDR
+
+#include "lib/krt-scan.h"
+
+CF_DECLS
+
+CF_KEYWORDS(LEARN, SCAN, TIME)
+
+CF_GRAMMAR
+
+CF_ADDTO(kern_proto, kern_proto krt_scan_item ';')
+
+krt_scan_item:
+   LEARN bool {
+      ((struct krt_proto *) this_proto)->scanopt.learn = $2;
+   }
+ | SCAN TIME expr {
+      /* Scan time of 0 means scan on startup only */
+      ((struct krt_proto *) this_proto)->scanopt.recurrence = $3;
+   }
+ ;
+
+CF_CODE
+
+CF_END
diff --git a/sysdep/linux/krt-scan.c b/sysdep/linux/krt-scan.c
index 6fdb3bf..9d8cf5f 100644
--- a/sysdep/linux/krt-scan.c
+++ b/sysdep/linux/krt-scan.c
@@ -131,11 +131,11 @@ krt_parse_entry(byte *e, struct krt_proto *p)
 	return;
 #endif
       DBG("krt_parse_entry: kernel reporting unknown route %I/%d\n", dest, masklen);
-#if 1
-      /* FIXME: should be configurable */
-      if (flags & RTF_GATEWAY)
-	krt_magic_route(p, net, gw);
-#endif
+      if (p->scanopt.learn)
+	{
+	  if (flags & RTF_GATEWAY)
+	    krt_magic_route(p, net, gw);
+	}
       net->n.flags |= KRF_UPDATE;
     }
 }
@@ -235,7 +235,8 @@ krt_scan_preconfig(struct krt_proto *x)
 {
   SCANOPT;
 
-  p->recurrence = 10;			/* FIXME: use reasonable default value */
+  p->recurrence = 60;
+  p->learn = 0;
 }
 
 void
diff --git a/sysdep/linux/krt-scan.h b/sysdep/linux/krt-scan.h
index 1ea1ca7..18073e2 100644
--- a/sysdep/linux/krt-scan.h
+++ b/sysdep/linux/krt-scan.h
@@ -11,6 +11,7 @@
 
 struct krt_scan_params {
   int recurrence;			/* How often should we scan krt, 0=only on startup */
+  int learn;				/* Should we learn routes from the kernel? */
   struct timer *timer;
 };
 
diff --git a/sysdep/unix/Modules b/sysdep/unix/Modules
index 70ed145..441c3f0 100644
--- a/sysdep/unix/Modules
+++ b/sysdep/unix/Modules
@@ -5,6 +5,7 @@ io.c
 unix.h
 sync-if.c
 sync-rt.c
+krt.Y
 krt.h
 krt-set.c
 krt-set.h
diff --git a/sysdep/unix/krt.Y b/sysdep/unix/krt.Y
new file mode 100644
index 0000000..d4dd082
--- /dev/null
+++ b/sysdep/unix/krt.Y
@@ -0,0 +1,34 @@
+/*
+ *	BIRD -- UNIX Kernel Syncer Configuration
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+CF_HDR
+
+#include "lib/krt.h"
+
+CF_DECLS
+
+CF_KEYWORDS(KERNEL)
+
+CF_GRAMMAR
+
+/* Kernel protocol */
+
+CF_ADDTO(proto, kern_proto '}')
+
+kern_proto_start: proto_start KERNEL {
+     if (!(this_proto = cf_krt_proto)) cf_error("Kernel protocol already defined");
+     cf_krt_proto = NULL;
+   }
+ ;
+
+CF_ADDTO(kern_proto, kern_proto_start '{')
+CF_ADDTO(kern_proto, kern_proto proto_item ';')
+
+CF_CODE
+
+CF_END
diff --git a/sysdep/unix/krt.h b/sysdep/unix/krt.h
index e7b5597..2da29e5 100644
--- a/sysdep/unix/krt.h
+++ b/sysdep/unix/krt.h
@@ -22,6 +22,8 @@ struct krt_proto {
   struct krt_scan_params scanopt;
 };
 
+extern struct proto *cf_krt_proto;
+
 /* krt-scan.c */
 
 void krt_scan_preconfig(struct krt_proto *);
diff --git a/sysdep/unix/main.c b/sysdep/unix/main.c
index 4aeb9c1..f5076c4 100644
--- a/sysdep/unix/main.c
+++ b/sysdep/unix/main.c
@@ -82,7 +82,6 @@ read_config(void)
   cf_read_hook = cf_read;
   cf_lex_init(1);
   cf_parse();
-  add_tail(&protocol_list, &proto_unix_kernel.n); /* FIXME: Must be _always_ the last one */
   protos_postconfig();
 }
 
@@ -104,6 +103,7 @@ main(void)
   if_init();
 
   protos_build();
+  add_tail(&protocol_list, &proto_unix_kernel.n);
   protos_init();
 
   debug("Reading configuration file.\n");
diff --git a/sysdep/unix/sync-rt.c b/sysdep/unix/sync-rt.c
index 69b2bde..169494e 100644
--- a/sysdep/unix/sync-rt.c
+++ b/sysdep/unix/sync-rt.c
@@ -23,6 +23,8 @@
 #include "unix.h"
 #include "krt.h"
 
+struct proto *cf_krt_proto;
+
 void
 krt_start(struct proto *P)
 {
@@ -42,6 +44,7 @@ krt_preconfig(struct protocol *x)
 {
   struct krt_proto *p = (struct krt_proto *) proto_new(&proto_unix_kernel, sizeof(struct krt_proto));
 
+  cf_krt_proto = &p->p;
   p->p.preference = DEF_PREF_UKR;
   p->p.start = krt_start;
   p->p.shutdown = krt_shutdown;
-- 
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