diff options
Diffstat (limited to 'src/vnet/bfd/bfd_main.h')
| -rw-r--r-- | src/vnet/bfd/bfd_main.h | 94 |
1 files changed, 66 insertions, 28 deletions
diff --git a/src/vnet/bfd/bfd_main.h b/src/vnet/bfd/bfd_main.h index 14a54d6f3df..d8063f9de33 100644 --- a/src/vnet/bfd/bfd_main.h +++ b/src/vnet/bfd/bfd_main.h @@ -24,17 +24,6 @@ #include <vnet/bfd/bfd_protocol.h> #include <vnet/bfd/bfd_udp.h> -#define foreach_bfd_transport(F) \ - F (UDP4, "ip4-rewrite") \ - F (UDP6, "ip6-rewrite") - -typedef enum -{ -#define F(t, n) BFD_TRANSPORT_##t, - foreach_bfd_transport (F) -#undef F -} bfd_transport_t; - #define foreach_bfd_mode(F) \ F (asynchronous) \ F (demand) @@ -64,14 +53,15 @@ typedef struct bfd_auth_type_e auth_type; } bfd_auth_key_t; -#define foreach_bfd_poll_state(F)\ - F(NOT_NEEDED)\ -F(NEEDED)\ -F(IN_PROGRESS) +#define foreach_bfd_poll_state(F) \ + F (NOT_NEEDED) \ + F (NEEDED) \ + F (IN_PROGRESS) \ + F (IN_PROGRESS_AND_QUEUED) typedef enum { -#define F(x) POLL_##x, +#define F(x) BFD_POLL_##x, foreach_bfd_poll_state (F) #undef F } bfd_poll_state_e; @@ -120,21 +110,27 @@ typedef struct bfd_session_s /* remote min rx interval (clocks) */ u64 remote_min_rx_clocks; + /* remote min echo rx interval (microseconds) */ + u64 remote_min_echo_rx_usec; + + /* remote min echo rx interval (clocks) */ + u64 remote_min_echo_rx_clocks; + /* remote desired min tx interval (clocks) */ u64 remote_desired_min_tx_clocks; /* configured detect multiplier */ u8 local_detect_mult; - /* 1 if in demand mode, 0 otherwise */ - u8 local_demand; - /* 1 if remote system sets demand mode, 0 otherwise */ u8 remote_demand; /* remote detect multiplier */ u8 remote_detect_mult; + /* 1 is echo function is active, 0 otherwise */ + u8 echo; + /* set to value of timer in timing wheel, 0 if never set */ u64 wheel_time_clocks; @@ -150,12 +146,33 @@ typedef struct bfd_session_s /* timestamp of last packet received */ u64 last_rx_clocks; + /* transmit interval for echo packets */ + u64 echo_transmit_interval_clocks; + + /* next time at which to transmit echo packet */ + u64 echo_tx_timeout_clocks; + + /* timestamp of last echo packet transmitted */ + u64 echo_last_tx_clocks; + + /* timestamp of last echo packet received */ + u64 echo_last_rx_clocks; + + /* secret used for calculating/checking checksum of echo packets */ + u32 echo_secret; + /* detection time */ u64 detection_time_clocks; /* state info regarding poll sequence */ bfd_poll_state_e poll_state; + /* + * helper for delayed poll sequence - marks either start of running poll + * sequence or timeout, after which we can start the next poll sequnce + */ + u64 poll_state_start_or_timeout_clocks; + /* authentication information */ struct { @@ -191,7 +208,7 @@ typedef struct bfd_session_s } auth; /* transport type for this session */ - bfd_transport_t transport; + bfd_transport_e transport; /* union of transport-specific data */ union @@ -227,6 +244,9 @@ typedef struct /* default desired min tx in clocks */ u64 default_desired_min_tx_clocks; + /* minimum required min rx while echo function is active - clocks */ + u64 min_required_min_rx_while_echo_clocks; + /* for generating random numbers */ u32 random_seed; @@ -268,36 +288,54 @@ enum BFD_EVENT_CONFIG_CHANGED, } bfd_process_event_e; -u8 *bfd_input_format_trace (u8 * s, va_list * args); +/* echo packet structure */ +/* *INDENT-OFF* */ +typedef CLIB_PACKED (struct { + /* local discriminator */ + u32 discriminator; + /* expire time of this packet - clocks */ + u64 expire_time_clocks; + /* checksum - based on discriminator, local secret and expire time */ + u64 checksum; +}) bfd_echo_pkt_t; +/* *INDENT-ON* */ -bfd_session_t *bfd_get_session (bfd_main_t * bm, bfd_transport_t t); +u8 *bfd_input_format_trace (u8 * s, va_list * args); +bfd_session_t *bfd_get_session (bfd_main_t * bm, bfd_transport_e t); void bfd_put_session (bfd_main_t * bm, bfd_session_t * bs); bfd_session_t *bfd_find_session_by_idx (bfd_main_t * bm, uword bs_idx); bfd_session_t *bfd_find_session_by_disc (bfd_main_t * bm, u32 disc); void bfd_session_start (bfd_main_t * bm, bfd_session_t * bs); void bfd_consume_pkt (bfd_main_t * bm, const bfd_pkt_t * bfd, u32 bs_idx); +int bfd_consume_echo_pkt (bfd_main_t * bm, vlib_buffer_t * b); int bfd_verify_pkt_common (const bfd_pkt_t * pkt); int bfd_verify_pkt_auth (const bfd_pkt_t * pkt, u16 pkt_size, bfd_session_t * bs); void bfd_event (bfd_main_t * bm, bfd_session_t * bs); void bfd_init_final_control_frame (vlib_main_t * vm, vlib_buffer_t * b, - bfd_session_t * bs); + bfd_main_t * bm, bfd_session_t * bs); u8 *format_bfd_session (u8 * s, va_list * args); void bfd_session_set_flags (bfd_session_t * bs, u8 admin_up_down); unsigned bfd_auth_type_supported (bfd_auth_type_e auth_type); vnet_api_error_t bfd_auth_activate (bfd_session_t * bs, u32 conf_key_id, u8 bfd_key_id, u8 is_delayed); vnet_api_error_t bfd_auth_deactivate (bfd_session_t * bs, u8 is_delayed); -vnet_api_error_t -bfd_session_set_params (bfd_main_t * bm, bfd_session_t * bs, - u32 desired_min_tx_usec, - u32 required_min_rx_usec, u8 detect_mult); +vnet_api_error_t bfd_session_set_params (bfd_main_t * bm, bfd_session_t * bs, + u32 desired_min_tx_usec, + u32 required_min_rx_usec, + u8 detect_mult); #define USEC_PER_MS 1000LL #define USEC_PER_SECOND (1000 * USEC_PER_MS) /* default, slow transmission interval for BFD packets, per spec at least 1s */ -#define BFD_DEFAULT_DESIRED_MIN_TX_US USEC_PER_SECOND +#define BFD_DEFAULT_DESIRED_MIN_TX_USEC USEC_PER_SECOND + +/* + * minimum required min rx set locally when echo function is used, per spec + * should be set to at least 1s + */ +#define BFD_REQUIRED_MIN_RX_USEC_WHILE_ECHO USEC_PER_SECOND #endif /* __included_bfd_main_h__ */ |