Merge branch 'master' into mq-filter-stack

[thirdparty/bird.git] / proto / bgp / bgp.h

diff --git a/proto/bgp/bgp.h b/proto/bgp/bgp.h
index 512410d413fbe413fe68fb2800767575296ce290..075e1bb9c3bcf6672108f8a01b8e4f23f55350f3 100644 (file)
--- a/proto/bgp/bgp.h
+++ b/proto/bgp/bgp.h
@@ -83,6 +83,7 @@ struct bgp_config {
   struct iface *iface;                 /* Interface for link-local addresses */
   u16 local_port;                      /* Local listening port */
   u16 remote_port;                     /* Neighbor destination port */
+  int peer_type;                       /* Internal or external BGP (BGP_PT_*, optional) */
   int multihop;                                /* Number of hops if multihop */
   int strict_bind;                     /* Bind listening socket to local address */
   int ttl_security;                    /* Enable TTL security [RFC 5082] */
@@ -123,6 +124,9 @@ struct bgp_config {
   u32 disable_after_cease;             /* Disable it when cease is received, bitfield */
 
   char *password;                      /* Password used for MD5 authentication */
+  net_addr *remote_range;              /* Allowed neighbor range for dynamic BGP */
+  char *dynamic_name;                  /* Name pattern for dynamic BGP */
+  int dynamic_name_digits;             /* Minimum number of digits for dynamic names */
   int check_link;                      /* Use iface link state for liveness detection */
   int bfd;                             /* Use BFD for liveness detection */
 };
@@ -152,6 +156,9 @@ struct bgp_channel_config {
   struct rtable_config *igp_table_ip6; /* Table for recursive IPv6 next hop lookups */
 };
 
+#define BGP_PT_INTERNAL                1
+#define BGP_PT_EXTERNAL                2
+
 #define NH_NO                  0
 #define NH_ALL                 1
 #define NH_IBGP                        2
@@ -214,6 +221,8 @@ struct bgp_caps {
   u16 gr_time;                         /* Graceful restart time in seconds */
 
   u8 llgr_aware;                       /* Long-lived GR capability, RFC draft */
+  u8 any_ext_next_hop;                 /* Bitwise OR of per-AF ext_next_hop */
+  u8 any_add_path;                     /* Bitwise OR of per-AF add_path */
 
   u16 af_count;                                /* Number of af_data items */
   u16 length;                          /* Length of capabilities in OPEN msg */
@@ -237,6 +246,7 @@ struct bgp_conn {
   u8 state;                            /* State of connection state machine */
   u8 as4_session;                      /* Session uses 4B AS numbers in AS_PATH (both sides support it) */
   u8 ext_messages;                     /* Session uses extended message length */
+  u32 received_as;                     /* ASN received in OPEN message */
 
   struct bgp_caps *local_caps;
   struct bgp_caps *remote_caps;
@@ -263,12 +273,14 @@ struct bgp_proto {
   u32 local_id;                                /* BGP identifier of this router */
   u32 remote_id;                       /* BGP identifier of the neighbor */
   u32 rr_cluster_id;                   /* Route reflector cluster ID */
-  int start_state;                     /* Substates that partitions BS_START */
+  u8 start_state;                      /* Substates that partitions BS_START */
   u8 is_internal;                      /* Internal BGP session (local_as == remote_as) */
   u8 is_interior;                      /* Internal or intra-confederation BGP session */
   u8 as4_session;                      /* Session uses 4B AS numbers in AS_PATH (both sides support it) */
   u8 rr_client;                                /* Whether neighbor is RR client of me */
   u8 rs_client;                                /* Whether neighbor is RS client of me */
+  u8 ipv4;                             /* Use IPv4 connection, i.e. remote_ip is IPv4 */
+  u8 passive;                          /* Do not initiate outgoing connection */
   u8 route_refresh;                    /* Route refresh allowed to send [RFC 2918] */
   u8 enhanced_refresh;                 /* Enhanced refresh is negotiated [RFC 7313] */
   u8 gr_ready;                         /* Neighbor could do graceful restart */
@@ -285,10 +297,12 @@ struct bgp_proto {
   struct neighbor *neigh;              /* Neighbor entry corresponding to remote ip, NULL if multihop */
   struct bgp_socket *sock;             /* Shared listening socket */
   struct bfd_request *bfd_req;         /* BFD request, if BFD is used */
+  struct birdsock *postponed_sk;       /* Postponed incoming socket for dynamic BGP */
   ip_addr link_addr;                   /* Link-local version of local_ip */
   event *event;                                /* Event for respawning and shutting process */
   timer *startup_timer;                        /* Timer used to delay protocol startup due to previous errors (startup_delay) */
   timer *gr_timer;                     /* Timer waiting for reestablishment after graceful restart */
+  int dynamic_name_counter;            /* Counter for dynamic BGP names */
   uint startup_delay;                  /* Delay (in seconds) of protocol startup due to previous errors */
   btime last_proto_error;              /* Time of last error that leads to protocol stop */
   u8 last_error_class;                         /* Error class of last error */
@@ -378,7 +392,7 @@ struct bgp_write_state {
   int mpls;
 
   eattr *mp_next_hop;
-  adata *mpls_labels;
+  const adata *mpls_labels;
 };
 
 struct bgp_parse_state {
@@ -474,7 +488,7 @@ void bgp_graceful_restart_done(struct bgp_channel *c);
 void bgp_refresh_begin(struct bgp_channel *c);
 void bgp_refresh_end(struct bgp_channel *c);
 void bgp_store_error(struct bgp_proto *p, struct bgp_conn *c, u8 class, u32 code);
-void bgp_stop(struct bgp_proto *p, uint subcode, byte *data, uint len);
+void bgp_stop(struct bgp_proto *p, int subcode, byte *data, uint len);
 
 struct rte_source *bgp_find_source(struct bgp_proto *p, u32 path_id);
 struct rte_source *bgp_get_source(struct bgp_proto *p, u32 path_id);
@@ -509,7 +523,7 @@ bgp_set_attr_u32(ea_list **to, struct linpool *pool, uint code, uint flags, u32
 { bgp_set_attr(to, pool, code, flags, (uintptr_t) val); }
 
 static inline void
-bgp_set_attr_ptr(ea_list **to, struct linpool *pool, uint code, uint flags, struct adata *val)
+bgp_set_attr_ptr(ea_list **to, struct linpool *pool, uint code, uint flags, const struct adata *val)
 { bgp_set_attr(to, pool, code, flags, (uintptr_t) val); }
 
 static inline void
@@ -551,6 +565,7 @@ void bgp_get_route_info(struct rte *, byte *buf);
 /* packets.c */
 
 void bgp_dump_state_change(struct bgp_conn *conn, uint old, uint new);
+void bgp_prepare_capabilities(struct bgp_conn *conn);
 const struct bgp_af_desc *bgp_get_af_desc(u32 afi);
 const struct bgp_af_caps *bgp_find_af_caps(struct bgp_caps *caps, u32 afi);
 void bgp_schedule_packet(struct bgp_conn *conn, struct bgp_channel *c, int type);