Added configuration of the device internal protocol. This is primarily

intended to serve as an example of interface pattern list use. As a side
effect, you can disable generating of device routes by disabling
this protocol.

4 files changed, 79 insertions, 3 deletions

diff --git a/nest/config.Y b/nest/config.Y
index 9efebbe..7b82ba7 100644
--- a/nest/config.Y
+++ b/nest/config.Y
@@ -10,9 +10,14 @@ CF_HDR
 
 static struct proto *this_proto;
 
+#include "nest/rt-dev.h"
+
+void rt_dev_add_iface(char *);
+
 CF_DECLS
 
-CF_KEYWORDS(ROUTER, ID, PROTOCOL, PREFERENCE, DISABLED, DEBUG, ALL, OFF)
+CF_KEYWORDS(ROUTER, ID, PROTOCOL, PREFERENCE, DISABLED, DEBUG, ALL, OFF, DEVICE)
+CF_KEYWORDS(INTERFACE)
 
 %type <i> idval
 
@@ -64,6 +69,40 @@ proto_item:
  | DEBUG OFF { this_proto->debug = 0; }
  ;
 
+/* Device protocol */
+
+CF_ADDTO(proto, dev_proto '}')
+
+dev_proto_start: proto_start DEVICE {
+     if (!(this_proto = cf_dev_proto)) cf_error("Device protocol already defined");
+     cf_dev_proto = NULL;
+   }
+ ;
+
+dev_proto:
+   dev_proto_start '{'
+ | dev_proto proto_item ';'
+ | dev_proto dev_iface_list ';'
+ ;
+
+dev_iface_list:
+   INTERFACE TEXT {
+     init_list(&((struct rt_dev_proto *) this_proto)->iface_list);
+     rt_dev_add_iface($2);
+   }
+ | dev_iface_list ',' TEXT { rt_dev_add_iface($3); }
+ ;
+
 CF_CODE
 
+void
+rt_dev_add_iface(char *n)
+{
+  struct rt_dev_proto *p = (void *) this_proto;
+  struct iface_patt *k = cfg_alloc(sizeof(struct iface_patt));
+
+  k->pattern = cfg_strcpy(n);
+  add_tail(&p->iface_list, &k->n);
+}
+
 CF_END
diff --git a/nest/protocol.h b/nest/protocol.h
index 34624e9..59db428 100644
--- a/nest/protocol.h
+++ b/nest/protocol.h
@@ -75,7 +75,6 @@ struct proto {
   void (*rte_remove)(struct network *, struct rte *);
 
   /* Reconfigure function? */
-  /* Interface patterns */
   /* Input/output filters */
   /* Connection to routing tables? */
 
@@ -90,4 +89,10 @@ void *proto_new(struct protocol *, unsigned size);
 
 extern list proto_list, inactive_proto_list;
 
+/*
+ *	Known unique protocol instances as referenced by config routines
+ */
+
+extern struct proto *cf_dev_proto;
+
 #endif
diff --git a/nest/rt-dev.c b/nest/rt-dev.c
index 7ef04f0..e7d43fb 100644
--- a/nest/rt-dev.c
+++ b/nest/rt-dev.c
@@ -14,11 +14,20 @@
 #include "nest/iface.h"
 #include "nest/protocol.h"
 #include "nest/route.h"
+#include "nest/rt-dev.h"
+#include "conf/conf.h"
 #include "lib/resource.h"
 
+struct proto *cf_dev_proto;
+
 static void
 dev_if_notify(struct proto *p, unsigned c, struct iface *old, struct iface *new)
 {
+  struct rt_dev_proto *P = (void *) p;
+
+  if (old && !iface_patt_match(&P->iface_list, old) ||
+      new && !iface_patt_match(&P->iface_list, new))
+    return;
   if (c & IF_CHANGE_DOWN)
     {
       net *n;
@@ -72,11 +81,17 @@ dev_init(struct protocol *p)
 static void
 dev_preconfig(struct protocol *x)
 {
-  struct proto *p = proto_new(&proto_device, sizeof(struct proto));
+  struct rt_dev_proto *P = proto_new(&proto_device, sizeof(struct rt_dev_proto));
+  struct proto *p = &P->p;
+  struct iface_patt *k = cfg_alloc(sizeof(struct iface_patt));
 
+  cf_dev_proto = p;
   p->preference = DEF_PREF_DIRECT;
   p->start = dev_start;
   p->if_notify = dev_if_notify;
+  init_list(&P->iface_list);
+  k->pattern = "*";
+  add_tail(&P->iface_list, &k->n);
 }
 
 static void
diff --git a/nest/rt-dev.h b/nest/rt-dev.h
new file mode 100644
index 0000000..05a7f4c
--- /dev/null
+++ b/nest/rt-dev.h
@@ -0,0 +1,17 @@
+/*
+ *	BIRD -- Direct Device Routes
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#ifndef _BIRD_RT_DEV_H_
+#define _BIRD_RT_DEV_H_
+
+struct rt_dev_proto {
+  struct proto p;
+  list iface_list;
+};
+
+#endif