From a92fe607173b52cf28256f00399953c623788c35 Mon Sep 17 00:00:00 2001
From: Ondrej Zajicek <santiago@crfreenet.org>
Date: Sat, 1 Nov 2008 12:55:43 +0100
Subject: Implementation of route server.

---
 proto/bgp/attrs.c  | 2 +-
 proto/bgp/bgp.c    | 4 ++++
 proto/bgp/bgp.h    | 2 ++
 proto/bgp/config.Y | 3 ++-
 4 files changed, 9 insertions(+), 2 deletions(-)

(limited to 'proto')

diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c
index 2210cbe..811d52e 100644
--- a/proto/bgp/attrs.c
+++ b/proto/bgp/attrs.c
@@ -828,7 +828,7 @@ bgp_update_attrs(struct bgp_proto *p, rte *e, ea_list **attrs, struct linpool *p
 {
   eattr *a;
 
-  if (!p->is_internal)
+  if (!p->is_internal && !p->rs_client)
     {
       bgp_path_prepend(e, attrs, pool, p->local_as);
 
diff --git a/proto/bgp/bgp.c b/proto/bgp/bgp.c
index 0d580be..a34545b 100644
--- a/proto/bgp/bgp.c
+++ b/proto/bgp/bgp.c
@@ -492,6 +492,8 @@ bgp_start_locked(struct object_lock *lock)
       p->rr_client = cf->rr_client;
     }
 
+  p->rs_client = cf->rs_client;
+
   if (!p->neigh)
     {
       log(L_ERR "%s: Invalid next hop %I", p->p.name, p->next_hop);
@@ -644,6 +646,8 @@ bgp_check(struct bgp_config *c)
     cf_error("Neighbor AS number out of range");
   if ((c->local_as != c->remote_as) && (c->rr_client))
     cf_error("Only internal neighbor can be RR client");
+  if ((c->local_as == c->remote_as) && (c->rs_client))
+    cf_error("Only external neighbor can be RS client");
 }
 
 static void
diff --git a/proto/bgp/bgp.h b/proto/bgp/bgp.h
index 1d67e33..ea64584 100644
--- a/proto/bgp/bgp.h
+++ b/proto/bgp/bgp.h
@@ -28,6 +28,7 @@ struct bgp_config {
   int enable_as4;			/* Enable local support for 4B AS numbers [RFC4893] */
   u32 rr_cluster_id;			/* Route reflector cluster ID, if different from local ID */
   int rr_client;			/* Whether neighbor is RR client of me */
+  int rs_client;			/* Whether neighbor is RS client of me */
   unsigned connect_retry_time;
   unsigned hold_time, initial_hold_time;
   unsigned keepalive_time;
@@ -66,6 +67,7 @@ struct bgp_proto {
   u32 remote_id;			/* BGP identifier of the neighbor */
   u32 rr_cluster_id;			/* Route reflector cluster ID */
   int rr_client;			/* Whether neighbor is RR client of me */
+  int rs_client;			/* Whether neighbor is RS client of me */
   struct bgp_conn *conn;		/* Connection we have established */
   struct bgp_conn outgoing_conn;	/* Outgoing connection we're working with */
   struct bgp_conn incoming_conn;	/* Incoming connection we have neither accepted nor rejected yet */
diff --git a/proto/bgp/config.Y b/proto/bgp/config.Y
index 8524b2d..73b584f 100644
--- a/proto/bgp/config.Y
+++ b/proto/bgp/config.Y
@@ -21,7 +21,7 @@ CF_KEYWORDS(BGP, LOCAL, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY, KEEPALIVE,
 	ERROR, START, DELAY, FORGET, WAIT, ENABLE, DISABLE, AFTER,
 	BGP_PATH, BGP_LOCAL_PREF, BGP_MED, BGP_ORIGIN, BGP_NEXT_HOP,
 	BGP_ATOMIC_AGGR, BGP_AGGREGATOR, BGP_COMMUNITY, SOURCE, ADDRESS,
-	PASSWORD, RR, CLIENT, CLUSTER, ID, AS4)
+	PASSWORD, RR, RS, CLIENT, CLUSTER, ID, AS4)
 
 CF_GRAMMAR
 
@@ -55,6 +55,7 @@ bgp_proto:
    }
  | bgp_proto RR CLUSTER ID expr ';' { BGP_CFG->rr_cluster_id = $5; }
  | bgp_proto RR CLIENT ';' { BGP_CFG->rr_client = 1; }
+ | bgp_proto RS CLIENT ';' { BGP_CFG->rs_client = 1; }
  | bgp_proto HOLD TIME expr ';' { BGP_CFG->hold_time = $4; }
  | bgp_proto STARTUP HOLD TIME expr ';' { BGP_CFG->initial_hold_time = $5; }
  | bgp_proto CONNECT RETRY TIME expr ';' { BGP_CFG->connect_retry_time = $5; }
-- 
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