X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/eb3a6cd62dc3b83c68ad174d4c439f5bbaa902e1..1e722029bc405a555e81840c00708084128c5cdd:/bgp.h?ds=sidebyside diff --git a/bgp.h b/bgp.h index d5c8b8a..8e636ab 100644 --- a/bgp.h +++ b/bgp.h @@ -1,5 +1,5 @@ /* BGPv4 (RFC1771) */ -/* $Id: bgp.h,v 1.2 2004/06/28 02:43:13 fred_nerk Exp $ */ +/* $Id: bgp.h,v 1.5 2005-06-04 15:42:35 bodea Exp $ */ #ifndef __BGP_H__ #define __BGP_H__ @@ -7,6 +7,7 @@ #define BGP_MAX_PACKET_SIZE 4096 #define BGP_HOLD_TIME 180 /* seconds before peer times us out */ #define BGP_KEEPALIVE_TIME 60 /* seconds between messages */ +#define BGP_STATE_TIME 60 /* state transition timeout in seconds */ #define BGP_MAX_RETRY 42 /* maximum number of times to retry */ #define BGP_RETRY_BACKOFF 60 /* number of seconds between retries, cumulative */ @@ -16,8 +17,8 @@ struct bgp_header { char marker[16]; - u16 len; - u8 type; + uint16_t len; + uint8_t type; } __attribute__ ((packed)); /* bgp_header.type */ @@ -32,38 +33,94 @@ struct bgp_packet { } __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) @@ -84,9 +141,11 @@ struct bgp_path_attr { #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 */ @@ -94,12 +153,13 @@ struct bgp_path_attr { #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 @@ -111,6 +171,7 @@ struct bgp_data_notification { # 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 @@ -137,6 +198,11 @@ enum bgp_state { 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; @@ -147,10 +213,17 @@ struct bgp_buf { 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 */ @@ -159,7 +232,10 @@ struct bgp_peer { time_t keepalive_time; /* time to send next keepalive */ time_t retry_time; /* time for connection retry */ int retry_count; /* connection retry count */ - int hold; /* hold time from peer */ + int init_keepalive; /* initial keepalive time */ + int init_hold; /* initial hold time */ + int keepalive; /* negotiated keepalive time */ + int hold; /* negotiated hold time */ time_t expire_time; /* time next peer packet expected */ int routing; /* propagate routes */ int update_routes; /* UPDATE required */ @@ -169,6 +245,14 @@ struct bgp_peer { 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 */ @@ -176,29 +260,25 @@ struct bgp_peer { #define BGP_CLI_ENABLE 2 #define BGP_CLI_RESTART 3 -#define BGP_NUM_PEERS 2 extern struct bgp_peer *bgp_peers; -extern struct bgp_route_list *bgp_routes; extern int bgp_configured; /* actions */ int bgp_setup(int as); -int bgp_start(struct bgp_peer *peer, char *name, int as, 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); - -/* CLI */ -int cmd_show_bgp(struct cli_def *cli, char *command, char **argv, int argc); -int cmd_suspend_bgp(struct cli_def *cli, char *command, char **argv, int argc); -int cmd_no_suspend_bgp(struct cli_def *cli, char *command, char **argv, int argc); -int cmd_restart_bgp(struct cli_def *cli, char *command, char **argv, int argc); - -extern char const *cvs_id_bgp; +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); #endif /* __BGP_H__ */