From a23197980e40d4d9414bcfaf59005a1dc2a89251 Mon Sep 17 00:00:00 2001 From: sreejith Date: Wed, 29 Mar 2017 01:15:02 -0400 Subject: Added vpp intial source code from master branch 17.01.1 Change-Id: I81bdace6f330825a1746a853766779dfb24765fd Signed-off-by: sreejith --- vpp/vnet/vnet/bfd/bfd_main.h | 220 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 220 insertions(+) create mode 100644 vpp/vnet/vnet/bfd/bfd_main.h (limited to 'vpp/vnet/vnet/bfd/bfd_main.h') diff --git a/vpp/vnet/vnet/bfd/bfd_main.h b/vpp/vnet/vnet/bfd/bfd_main.h new file mode 100644 index 00000000..c72ea92a --- /dev/null +++ b/vpp/vnet/vnet/bfd/bfd_main.h @@ -0,0 +1,220 @@ +/* + * Copyright (c) 2011-2016 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/** + * @file + * @brief BFD global declarations + */ +#ifndef __included_bfd_main_h__ +#define __included_bfd_main_h__ + +#include +#include +#include +#include + +#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) + +typedef enum +{ +#define F(x) BFD_MODE_##x, + foreach_bfd_mode (F) +#undef F +} bfd_mode_e; + +typedef struct +{ + /* index in bfd_main.sessions pool */ + u32 bs_idx; + + /* session state */ + bfd_state_e local_state; + + /* local diagnostics */ + bfd_diag_code_e local_diag; + + /* remote session state */ + bfd_state_e remote_state; + + /* local discriminator */ + u32 local_discr; + + /* remote discriminator */ + u32 remote_discr; + + /* configured desired min tx interval (microseconds) */ + u32 config_desired_min_tx_us; + + /* desired min tx interval (microseconds) */ + u32 desired_min_tx_us; + + /* desired min tx interval (clocks) */ + u64 desired_min_tx_clocks; + + /* required min rx interval */ + u32 required_min_rx_us; + + /* remote min rx interval (microseconds) */ + u32 remote_min_rx_us; + + /* remote min rx interval (clocks) */ + u64 remote_min_rx_clocks; + + /* remote desired min tx interval */ + u32 remote_desired_min_tx_us; + + /* 1 if in demand mode, 0 otherwise */ + u8 local_demand; + + /* 1 if remote system sets demand mode, 0 otherwise */ + u8 remote_demand; + + /* local detect multiplier */ + u8 local_detect_mult; + + /* remote detect multiplier */ + u8 remote_detect_mult; + + /* set to value of timer in timing wheel, 0 if never set */ + u64 wheel_time_clocks; + + /* transmit interval */ + u64 transmit_interval_clocks; + + /* next time at which to transmit a packet */ + u64 tx_timeout_clocks; + + /* timestamp of last packet received */ + u64 last_rx_clocks; + + /* detection time */ + u64 detection_time_clocks; + + /* transport type for this session */ + bfd_transport_t transport; + + union + { + bfd_udp_session_t udp; + }; +} bfd_session_t; + +typedef struct +{ + u32 client_index; + u32 client_pid; +} event_subscriber_t; + +typedef struct +{ + /* pool of bfd sessions context data */ + bfd_session_t *sessions; + + /* timing wheel for scheduling timeouts */ + timing_wheel_t wheel; + + /* timing wheel inaccuracy, in clocks */ + u64 wheel_inaccuracy; + + /* hashmap - bfd session by discriminator */ + u32 *session_by_disc; + + /* background process node index */ + u32 bfd_process_node_index; + + /* convenience variables */ + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; + + /* cpu clocks per second */ + f64 cpu_cps; + + /* for generating random numbers */ + u32 random_seed; + +} bfd_main_t; + +extern bfd_main_t bfd_main; + +/* Packet counters */ +#define foreach_bfd_error(F) \ + F (NONE, "good bfd packets (processed)") \ + F (BAD, "invalid bfd packets") \ + F (DISABLED, "bfd packets received on disabled interfaces") + +typedef enum +{ +#define F(sym, str) BFD_ERROR_##sym, + foreach_bfd_error (F) +#undef F + BFD_N_ERROR, +} bfd_error_t; + +/* bfd packet trace capture */ +typedef struct +{ + u32 len; + u8 data[400]; +} bfd_input_trace_t; + +enum +{ + BFD_EVENT_RESCHEDULE = 1, + BFD_EVENT_NEW_SESSION, +} bfd_process_event_e; + +u8 *bfd_input_format_trace (u8 * s, va_list * args); + +bfd_session_t *bfd_get_session (bfd_main_t * bm, bfd_transport_t 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_verify_pkt_common (const bfd_pkt_t * pkt); +int bfd_verify_pkt_session (const bfd_pkt_t * pkt, u16 pkt_size, + const bfd_session_t * bs); +void bfd_event (bfd_main_t * bm, bfd_session_t * bs); +void bfd_send_final (vlib_main_t * vm, vlib_buffer_t * b, bfd_session_t * bs); +u8 *format_bfd_session (u8 * s, va_list * args); + + +#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 + +#endif /* __included_bfd_main_h__ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg