Changed initialization of protocol list -- now we call proto_build() instead

of calling the protocols manually.

Implemented printing of dynamic attributes in `show route all'.

Each protocol can now register its own attribute class (protocol->attr_class,
set to EAP_xxx) and also a callback for naming and formatting of attributes.
The callback can return one of the following results:

	GA_UNKNOWN	Attribute not recognized.
	GA_NAME		Attribute name recognized and put to the buffer,
			generic code should format the value.
	GA_FULL		Both attribute name and value put to the buffer.

Please update protocols generating dynamic attributes to provide
the attr_class and formatting hook.

5 files changed, 94 insertions, 16 deletions

diff --git a/nest/proto.c b/nest/proto.c
index c6a3d7d..abf4a3c 100644
--- a/nest/proto.c
+++ b/nest/proto.c
@@ -22,7 +22,7 @@
 
 static pool *proto_pool;
 
-list protocol_list;
+static list protocol_list;
 static list proto_list;
 
 #define WALK_PROTO_LIST(p) do {							\
@@ -344,6 +344,17 @@ protos_dump_all(void)
 }
 
 void
+proto_build(struct protocol *p)
+{
+  add_tail(&protocol_list, &p->n);
+  if (p->attr_class)
+    {
+      ASSERT(!attr_class_to_protocol[p->attr_class]);
+      attr_class_to_protocol[p->attr_class] = p;
+    }
+}
+
+void
 protos_build(void)
 {
   init_list(&protocol_list);
@@ -352,21 +363,21 @@ protos_build(void)
   init_list(&inactive_proto_list);
   init_list(&initial_proto_list);
   init_list(&flush_proto_list);
-  add_tail(&protocol_list, &proto_device.n);
+  proto_build(&proto_device);
 #ifdef CONFIG_RIP
-  add_tail(&protocol_list, &proto_rip.n);
+  proto_build(&proto_rip);
 #endif
 #ifdef CONFIG_STATIC
-  add_tail(&protocol_list, &proto_static.n);
+  proto_build(&proto_static);
 #endif
 #ifdef CONFIG_OSPF
-  add_tail(&protocol_list, &proto_ospf.n);
+  proto_build(&proto_ospf);
 #endif
 #ifdef CONFIG_PIPE
-  add_tail(&protocol_list, &proto_pipe.n);
+  proto_build(&proto_pipe);
 #endif
 #ifdef CONFIG_BGP
-  add_tail(&protocol_list, &proto_bgp.n);
+  proto_build(&proto_bgp);
 #endif
   proto_pool = rp_new(&root_pool, "Protocols");
   proto_flush_event = ev_new(proto_pool);
diff --git a/nest/protocol.h b/nest/protocol.h
index b02ea02..2e64112 100644
--- a/nest/protocol.h
+++ b/nest/protocol.h
@@ -24,6 +24,7 @@ struct config;
 struct proto;
 struct event;
 struct ea_list;
+struct eattr;
 struct symbol;
 
 /*
@@ -35,6 +36,7 @@ struct protocol {
   char *name;
   char *template;			/* Template for automatic generation of names */
   int name_counter;			/* Counter for automatic name generation */
+  int attr_class;			/* Attribute class known to this protocol */
 
   void (*preconfig)(struct protocol *, struct config *);	/* Just before configuring */
   void (*postconfig)(struct proto_config *);			/* After configuring each instance */
@@ -46,16 +48,19 @@ struct protocol {
   int (*shutdown)(struct proto *);		/* Stop the instance */
   void (*get_status)(struct proto *, byte *buf); /* Get instance status (for `show protocols' command) */
   void (*get_route_info)(struct rte *, byte *buf); /* Get route information (for `show route' command) */
-  void (*show_route_data)(struct rte *);	/* Print verbose route information (`show route' again) */
+  int (*get_attr)(struct eattr *, byte *buf);	/* ASCIIfy dynamic attribute (returns GA_*) */
 };
 
 void protos_build(void);
+void proto_build(struct protocol *);
 void protos_preconfig(struct config *);
 void protos_postconfig(struct config *);
 void protos_commit(struct config *new, struct config *old, int force_restart);
 void protos_dump_all(void);
 
-extern list protocol_list;
+#define GA_UNKNOWN	0		/* Attribute not recognized */
+#define GA_NAME		1		/* Result = name */
+#define GA_FULL		2		/* Result = both name and value */
 
 /*
  *	Known protocols
@@ -146,7 +151,6 @@ struct proto {
   /* Hic sunt protocol-specific data */
 };
 
-void proto_build(struct proto_config *);
 void *proto_new(struct proto_config *, unsigned size);
 void *proto_config_new(struct protocol *, unsigned size);
 
diff --git a/nest/route.h b/nest/route.h
index f180d5e..96ee580 100644
--- a/nest/route.h
+++ b/nest/route.h
@@ -283,6 +283,7 @@ typedef struct eattr {
 #define EAP_GENERIC 0			/* Generic attributes */
 #define EAP_BGP 1			/* BGP attributes */
 #define EAP_RIP 2			/* RIP */
+#define EAP_MAX 3
 
 #define EA_CODE(proto,id) (((proto) << 8) | (id))
 #define EA_PROTO(ea) ((ea) >> 8)
@@ -336,6 +337,8 @@ void rta_dump_all(void);
 static inline eattr * rta_find(rta *a, unsigned ea) { return ea_find(a->eattrs, ea); }
 void rta_show(struct cli *, rta *);
 
+extern struct protocol *attr_class_to_protocol[EAP_MAX];
+
 /*
  *	Default protocol preferences
  */
diff --git a/nest/rt-attr.c b/nest/rt-attr.c
index 63f596e..57c98b2 100644
--- a/nest/rt-attr.c
+++ b/nest/rt-attr.c
@@ -19,6 +19,8 @@
 static slab *rta_slab;
 static pool *rta_pool;
 
+struct protocol *attr_class_to_protocol[EAP_MAX];
+
 /*
  *	Extended Attributes
  */
@@ -234,6 +236,60 @@ ea_list_copy(ea_list *o)
 }
 
 void
+ea_format(eattr *e, byte *buf)
+{
+  struct protocol *p;
+  int status = GA_UNKNOWN;
+  unsigned int i, l;
+  struct adata *ad = (e->type & EAF_EMBEDDED) ? NULL : e->u.ptr;
+
+  if (p = attr_class_to_protocol[EA_PROTO(e->id)])
+    {
+      buf += bsprintf(buf, "%s.", p->name);
+      if (p->get_attr)
+	status = p->get_attr(e, buf);
+      buf += strlen(buf);
+    }
+  else if (EA_PROTO(e->id))
+    buf += bsprintf(buf, "%02x.", EA_PROTO(e->id));
+  if (status < GA_NAME)
+    buf += bsprintf(buf, "%02x", EA_ID(e->id));
+  if (status < GA_FULL)
+    {
+      *buf++ = ':';
+      *buf++ = ' ';
+      switch (e->type & EAF_TYPE_MASK)
+	{
+	case EAF_TYPE_INT:
+	  bsprintf(buf, "%d", e->u.data);
+	  break;
+	case EAF_TYPE_OPAQUE:
+	  l = (ad->length < 16) ? ad->length : 16;
+	  for(i=0; i<l; i++)
+	    {
+	      buf += bsprintf(buf, "%02x", ad->data[i]);
+	      if (i < l)
+		*buf++ = ' ';
+	    }
+	  if (l < ad->length)
+	    strcpy(buf, "...");
+	  break;
+	case EAF_TYPE_IP_ADDRESS:
+	  bsprintf(buf, "%I", *(ip_addr *) ad->data);
+	  break;
+	case EAF_TYPE_ROUTER_ID:
+	  bsprintf(buf, "%08x", e->u.data); /* FIXME: Better printing of router ID's */
+	  break;
+	case EAF_TYPE_AS_PATH:		/* FIXME */
+	case EAF_TYPE_INT_SET:		/* FIXME */
+	case EAF_TYPE_UNDEF:
+	default:
+	  bsprintf(buf, "<type %02x>", e->type);
+	}
+    }
+}
+
+void
 ea_dump(ea_list *e)
 {
   int i;
@@ -484,9 +540,17 @@ rta_show(struct cli *c, rta *a)
 			       "RIP", "RIP-ext", "OSPF", "OSPF-ext", "OSPF-IA", "OSPF-boundary",
 			       "BGP" };
   static char *cast_names[] = { "unicast", "broadcast", "multicast", "anycast" };
+  ea_list *eal;
+  int i;
+  byte buf[256];
 
   cli_printf(c, -1008, "\tType: %s %s %s", src_names[a->source], cast_names[a->cast], ip_scope_text(a->scope));
-  /* FIXME: Here we probably should print the dynamic attributes... */
+  for(eal=a->eattrs; eal; eal=eal->next)
+    for(i=0; i<eal->count; i++)
+      {
+	ea_format(&eal->attrs[i], buf);
+	cli_printf(c, -1012, "\t%s", buf);
+      }
 }
 
 void
diff --git a/nest/rt-table.c b/nest/rt-table.c
index 3daa836..6ad5b06 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -675,11 +675,7 @@ rt_show_rte(struct cli *c, byte *ia, rte *e, struct rt_show_data *d)
     bsprintf(info, " (%d)", e->pref);
   cli_printf(c, -1007, "%-18s %s [%s %s%s]%s", ia, via, a->proto->name, tm, from, info);
   if (d->verbose)
-    {
-      rta_show(c, a);
-      if (a->proto->proto->show_route_data)
-	a->proto->proto->show_route_data(e);
-    }
+    rta_show(c, a);
 }
 
 static void