Started work on BGP. Wrote main part of the connection handling code.

1 files changed, 69 insertions, 5 deletions

diff --git a/proto/bgp/bgp.h b/proto/bgp/bgp.h
index 2e352be4..8e2e8dfe 100644
--- a/proto/bgp/bgp.h
+++ b/proto/bgp/bgp.h
@@ -14,18 +14,82 @@ struct bgp_config {
   unsigned int local_as, remote_as;
   ip_addr remote_ip;
   int multihop;				/* Number of hops if multihop */
+  int connect_retry_time;
+  int hold_time;
+  int keepalive_time;
+};
+
+struct bgp_conn {
+  struct bgp_proto *bgp;
+  struct birdsock *sk;
+  int state;				/* State of connection state machine */
+  struct timer *connect_retry_timer;
+  struct timer *hold_timer;
+  struct timer *keepalive_timer;
 };
 
 struct bgp_proto {
   struct proto p;
+  struct bgp_config *cf;		/* Shortcut to BGP configuration */
+  node bgp_node;			/* Node in global BGP protocol list */
+  int local_as, remote_as;
+  int is_internal;			/* Internal BGP connection (local_as == remote_as) */
+  u32 local_id;				/* BGP identifier of this router */
+  u32 remote_id;			/* BGP identifier of the neighbor */
+  int hold_time;			/* Hold time calculated from my and neighbor's requirements */
+  struct bgp_conn conn;			/* Our primary connection */
+  struct bgp_conn incoming_conn;	/* Incoming connection we have neither accepted nor rejected yet */
+  struct object_lock *lock;		/* Lock for neighbor connection */
 };
 
-struct bgp_route {
-};
-
-struct bgp_attrs {
-};
+#define BGP_PORT 179
+#define BGP_RX_BUFFER_SIZE 4096
 
 void bgp_check(struct bgp_config *c);
 
+/* attrs.c */
+
+/* packets.c */
+
+/* Packet types */
+
+#define PKT_OPEN		0x01
+#define PKT_UPDATE		0x02
+#define PKT_NOTIFICATION	0x03
+#define PKT_KEEPALIVE		0x04
+
+/* Attributes */
+
+#define BAF_OPTIONAL		0x80
+#define BAF_TRANSITIVE		0x40
+#define BAF_PARTIAL		0x20
+#define BAF_EXT_LEN		0x10
+
+#define BA_ORIGIN		0x01	/* [RFC1771] */		/* WM */
+#define BA_AS_PATH		0x02				/* WM */
+#define BA_NEXT_HOP		0x03				/* WM */
+#define BA_MULTI_EXIT_DISC	0x04				/* ON */
+#define BA_LOCAL_PREF		0x05				/* WM */
+#define BA_ATOMIC_AGGR		0x06				/* WD */
+#define BA_AGGREGATOR		0x07				/* OT */
+#define BA_COMMUNITY		0x08	/* [RFC1997] */		/* OT */
+#define BA_ORIGINATOR_ID	0x09	/* [RFC1966] */		/* ON */
+#define BA_CLUSTER_LIST		0x0a				/* ON */
+/* We don't support these: */
+#define BA_DPA			0x0b	/* ??? */
+#define BA_ADVERTISER		0x0c	/* [RFC1863] */
+#define BA_RCID_PATH		0x0d
+#define BA_MP_REACH_NLRI	0x0e	/* [RFC2283] */
+#define BA_MP_UNREACH_NLRI	0x0f
+#define BA_EXTENDED_COMM	0x10	/* draft-ramachandra-bgp-ext-communities */
+
+/* BGP states */
+
+#define BS_IDLE			0
+#define BS_CONNECT		1	/* Attempting to connect */
+#define BS_ACTIVE		2	/* Waiting for connection retry & listening */
+#define BS_OPENSENT		3
+#define BS_OPENCONFIRM		4
+#define BS_ESTABLISHED		5
+
 #endif