/* BGPv4 (RFC1771) */
-/* $Id: bgp.h,v 1.3 2004-11-11 03:07:42 bodea Exp $ */
+/* $Id: bgp.h,v 1.5 2005-06-04 15:42:35 bodea Exp $ */
#ifndef __BGP_H__
#define __BGP_H__
struct bgp_header {
char marker[16];
- u16 len;
- u8 type;
+ uint16_t len;
+ uint8_t type;
} __attribute__ ((packed));
/* bgp_header.type */
} __attribute__ ((packed));
struct bgp_data_open {
- u8 version;
+ uint8_t version;
#define BGP_VERSION 4
- u16 as;
- u16 hold_time;
- u32 identifier;
- u8 opt_len;
+ uint16_t as;
+ uint16_t hold_time;
+ uint32_t identifier;
+ uint8_t opt_len;
#define BGP_DATA_OPEN_SIZE 10 /* size of struct excluding opt_params */
char opt_params[sizeof(((struct bgp_packet *)0)->data) - BGP_DATA_OPEN_SIZE]; /* variable */
} __attribute__ ((packed));
+struct bgp_opt_param {
+ uint8_t type;
+ uint8_t len;
+#define BGP_MAX_OPT_PARAM_SIZE 256
+ char value[BGP_MAX_OPT_PARAM_SIZE];
+} __attribute__ ((packed));
+
+#define BGP_PARAM_TYPE_CAPABILITY 2
+struct bgp_capability {
+ uint8_t code;
+ uint8_t len;
+#define BGP_MAX_CAPABILITY_SIZE 256
+ char value[BGP_MAX_CAPABILITY_SIZE];
+} __attribute__ ((packed));
+
+/* RFC4760 Multiprotocol extension */
+#define BGP_CAP_CODE_MP 1
+
+struct bgp_mp_cap_param {
+ uint16_t afi; /* sa_family_t */
+ uint8_t reserved; /* SHOULD be 0 */
+ uint8_t safi;
+} __attribute__ ((packed));
+
+/* bgp_mp_cap_param.afi */
+#define BGP_MP_AFI_RESERVED 0
+#define BGP_MP_AFI_IPv4 1
+#define BGP_MP_AFI_IPv6 2
+/* bgp_mp_cap_param.safi */
+#define BGP_MP_SAFI_UNICAST 1
+#define BGP_MP_SAFI_MULTICAST 2
+
+struct bgp_ip6_prefix {
+ uint8_t len;
+ uint8_t prefix[16]; /* variable */
+} __attribute__ ((packed));
+
+/* end of RFC4760 specific definitions */
+
struct bgp_ip_prefix {
- u8 len;
- u32 prefix; /* variable */
+ uint8_t len;
+ uint32_t prefix; /* variable */
} __attribute__ ((packed));
+/* works for both IPv4 and IPv6 prefixes */
#define BGP_IP_PREFIX_SIZE(p) (1 + ((p).len / 8) + ((p).len % 8 != 0))
struct bgp_path_attr {
- u8 flags;
- u8 code;
+ uint8_t flags;
+ uint8_t code;
union {
struct {
- u8 len;
+ uint8_t len;
char value[29]; /* semi-random size, adequate for l2tpns */
} __attribute__ ((packed)) s; /* short */
struct {
- u16 len;
+ uint16_t len;
char value[28];
} __attribute__ ((packed)) e; /* extended */
} data; /* variable */
} __attribute__ ((packed));
+struct bgp_attr_mp_reach_nlri_partial {
+ uint16_t afi; /* sa_family_t */
+ uint8_t safi;
+ uint8_t next_hop_len;
+ uint8_t next_hop[16];
+ uint8_t reserved;
+} __attribute__ ((packed));
+#define BGP_PATH_ATTR_MP_REACH_NLRI_PARTIAL_SIZE (3 + sizeof(struct bgp_attr_mp_reach_nlri_partial))
+
+struct bgp_attr_mp_unreach_nlri_partial {
+ uint16_t afi; /* sa_family_t */
+ uint8_t safi;
+} __attribute__ ((packed));
+/* we use it as an extended attribute */
+#define BGP_PATH_ATTR_MP_UNREACH_NLRI_PARTIAL_SIZE (4 + sizeof(struct bgp_attr_mp_unreach_nlri_partial))
+
/* bgp_path_attr.flags (bitfields) */
#define BGP_PATH_ATTR_FLAG_OPTIONAL (1 << 7)
#define BGP_PATH_ATTR_FLAG_TRANS (1 << 6)
#define BGP_PATH_ATTR_CODE_ATOMIC_AGGREGATE 6 /* well-known, discretionary */
#define BGP_PATH_ATTR_CODE_AGGREGATOR 7 /* optional, transitive */
#define BGP_PATH_ATTR_CODE_COMMUNITIES 8 /* optional, transitive (RFC1997) */
+#define BGP_PATH_ATTR_CODE_MP_REACH_NLRI 14 /* optional, non-transitive (RFC4760) */
+#define BGP_PATH_ATTR_CODE_MP_UNREACH_NLRI 15 /* optional, non-transitive (RFC4760) */
#define BGP_PATH_ATTR_SIZE(p) ((((p).flags & BGP_PATH_ATTR_FLAG_EXTLEN) \
- ? ((p).data.e.len + 1) : (p).data.s.len) + 3)
+ ? ((p).data.e.len + 4) : (p).data.s.len) + 3)
/* well known COMMUNITIES */
#define BGP_COMMUNITY_NO_EXPORT 0xffffff01 /* don't advertise outside confederation */
#define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03 /* don't advertise to any other AS */
struct bgp_data_notification {
- u8 error_code;
- u8 error_subcode;
+ uint8_t error_code;
+ uint8_t error_subcode;
char data[sizeof(((struct bgp_packet *)0)->data) - 2]; /* variable */
} __attribute__ ((packed));
/* bgp_data_notification.error_code, .error_subcode */
+#define BGP_ERR_UNSPEC 0
#define BGP_ERR_HEADER 1
# define BGP_ERR_HDR_NOT_SYNC 1
# define BGP_ERR_HDR_BAD_LEN 2
# define BGP_ERR_OPN_UNSUP_PARAM 4
# define BGP_ERR_OPN_AUTH_FAILURE 5
# define BGP_ERR_OPN_HOLD_TIME 6
+# define BGP_ERR_OPN_UNSUP_CAP 7
#define BGP_ERR_UPDATE 3
# define BGP_ERR_UPD_BAD_ATTR_LIST 1
# define BGP_ERR_UPD_UNKN_WK_ATTR 2
Established, /* established */
};
+struct bgp_route6_list {
+ struct bgp_ip6_prefix dest;
+ struct bgp_route6_list *next;
+};
+
struct bgp_route_list {
struct bgp_ip_prefix dest;
struct bgp_route_list *next;
size_t done; /* bytes sent/recvd */
};
+enum bgp_mp_handling {
+ HandleIPv6Routes,
+ DoesntHandleIPv6Routes,
+ HandlingUnknown,
+};
+
/* state */
struct bgp_peer {
char name[32]; /* peer name */
in_addr_t addr; /* peer address */
+ in_addr_t source_addr; /* our source address */
int as; /* AS number */
int sock;
enum bgp_state state; /* FSM state */
int cli_flag; /* updates requested from CLI */
char *path_attrs; /* path attrs to send in UPDATE message */
int path_attr_len; /* length of path attrs */
+ int path_attr_len_without_nexthop; /* length of path attrs without NEXT_HOP */
+ uint32_t events; /* events to poll */
+ struct event_data edata; /* poll data */
+ enum bgp_mp_handling mp_handling; /* how it handles IPv6 routes advertisements */
+ int update_routes6; /* UPDATE required for IPv6 routes */
+ struct bgp_route6_list *routes6; /* IPv6 routes known by this peer */
+ char mp_reach_nlri_partial[BGP_PATH_ATTR_MP_REACH_NLRI_PARTIAL_SIZE];
+ char mp_unreach_nlri_partial[BGP_PATH_ATTR_MP_UNREACH_NLRI_PARTIAL_SIZE];
};
/* bgp_peer.cli_flag */
/* actions */
int bgp_setup(int as);
-int bgp_start(struct bgp_peer *peer, char *name, int as, int keepalive, int hold, int enable);
+int bgp_start(struct bgp_peer *peer, char *name, int as, int keepalive,
+ int hold, struct in_addr update_source, int enable);
+
void bgp_stop(struct bgp_peer *peer);
void bgp_halt(struct bgp_peer *peer);
int bgp_restart(struct bgp_peer *peer);
-int bgp_add_route(in_addr_t ip, in_addr_t mask);
-int bgp_del_route(in_addr_t ip, in_addr_t mask);
+int bgp_add_route(in_addr_t ip, int prefixlen);
+int bgp_add_route6(struct in6_addr ip, int prefixlen);
+int bgp_del_route(in_addr_t ip, int prefixlen);
+int bgp_del_route6(struct in6_addr ip, int prefixlen);
void bgp_enable_routing(int enable);
-int bgp_select_state(struct bgp_peer *peer);
-int bgp_process(struct bgp_peer *peer, int readable, int writable);
+int bgp_set_poll(void);
+int bgp_process(uint32_t events[]);
+void bgp_process_peers_timers();
char const *bgp_state_str(enum bgp_state state);
-extern char const *cvs_id_bgp;
-
#endif /* __BGP_H__ */
projects / l2tpns.git / blobdiff