path: root/src/vnet/tcp/tcp.h

/*
 * Copyright (c) 2016-2019 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.
 */

#ifndef _vnet_tcp_h_
#define _vnet_tcp_h_

#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/tcp/tcp_packet.h>
#include <vnet/tcp/tcp_timer.h>
#include <vnet/session/transport.h>
#include <vnet/session/session.h>
#include <vnet/tcp/tcp_debug.h>

#define TCP_TICK 0.001			/**< TCP tick period (s) */
#define THZ (u32) (1/TCP_TICK)		/**< TCP tick frequency */
#define TCP_TSTAMP_RESOLUTION TCP_TICK	/**< Time stamp resolution */
#define TCP_PAWS_IDLE 24 * 24 * 60 * 60 * THZ /**< 24 days */
#define TCP_FIB_RECHECK_PERIOD	1 * THZ	/**< Recheck every 1s */
#define TCP_MAX_OPTION_SPACE 40
#define TCP_CC_DATA_SZ 24
#define TCP_MAX_GSO_SZ 65536

#define TCP_DUPACK_THRESHOLD 	3
#define TCP_IW_N_SEGMENTS 	10
#define TCP_ALWAYS_ACK		1	/**< On/off delayed acks */
#define TCP_USE_SACKS		1	/**< Disable only for testing */

/** TCP FSM state definitions as per RFC793. */
#define foreach_tcp_fsm_state   \
  _(CLOSED, "CLOSED")           \
  _(LISTEN, "LISTEN")           \
  _(SYN_SENT, "SYN_SENT")       \
  _(SYN_RCVD, "SYN_RCVD")       \
  _(ESTABLISHED, "ESTABLISHED") \
  _(CLOSE_WAIT, "CLOSE_WAIT")   \
  _(FIN_WAIT_1, "FIN_WAIT_1")   \
  _(LAST_ACK, "LAST_ACK")       \
  _(CLOSING, "CLOSING")         \
  _(FIN_WAIT_2, "FIN_WAIT_2")   \
  _(TIME_WAIT, "TIME_WAIT")

typedef enum _tcp_state
{
#define _(sym, str) TCP_STATE_##sym,
  foreach_tcp_fsm_state
#undef _
  TCP_N_STATES
} tcp_state_t;

format_function_t format_tcp_state;
format_function_t format_tcp_flags;
format_function_t format_tcp_sacks;
format_function_t format_tcp_rcv_sacks;

/** TCP timers */
#define foreach_tcp_timer               \
  _(RETRANSMIT, "RETRANSMIT")           \
  _(DELACK, "DELAYED ACK")              \
  _(PERSIST, "PERSIST")                 \
  _(WAITCLOSE, "WAIT CLOSE")            \
  _(RETRANSMIT_SYN, "RETRANSMIT SYN")   \

typedef enum _tcp_timers
{
#define _(sym, str) TCP_TIMER_##sym,
  foreach_tcp_timer
#undef _
  TCP_N_TIMERS
} tcp_timers_e;

typedef void (timer_expiration_handler) (u32 index);

extern timer_expiration_handler tcp_timer_delack_handler;
extern timer_expiration_handler tcp_timer_retransmit_handler;
extern timer_expiration_handler tcp_timer_persist_handler;
extern timer_expiration_handler tcp_timer_retransmit_syn_handler;

#define TCP_TIMER_HANDLE_INVALID ((u32) ~0)

#define TCP_TIMER_TICK		0.1		/**< Timer tick in seconds */
#define TCP_TO_TIMER_TICK       TCP_TICK*10	/**< Factor for converting
						     ticks to timer ticks */

#define TCP_RTO_MAX 60 * THZ	/* Min max RTO (60s) as per RFC6298 */
#define TCP_RTO_MIN 0.2 * THZ	/* Min RTO (200ms) - lower than standard */
#define TCP_RTT_MAX 30 * THZ	/* 30s (probably too much) */
#define TCP_RTO_SYN_RETRIES 3	/* SYN retries without doubling RTO */
#define TCP_RTO_INIT 1 * THZ	/* Initial retransmit timer */
#define TCP_RTO_BOFF_MAX 8	/* Max number of retries before reset */
#define TCP_ESTABLISH_TIME (60 * THZ)	/* Connection establish timeout */

/** TCP connection flags */
#define foreach_tcp_connection_flag             \
  _(SNDACK, "Send ACK")                         \
  _(FINSNT, "FIN sent")				\
  _(RECOVERY, "Recovery")                    	\
  _(FAST_RECOVERY, "Fast Recovery")		\
  _(DCNT_PENDING, "Disconnect pending")		\
  _(HALF_OPEN_DONE, "Half-open completed")	\
  _(FINPNDG, "FIN pending")			\
  _(FRXT_PENDING, "Fast-retransmit pending")	\
  _(FRXT_FIRST, "Fast-retransmit first again")	\
  _(DEQ_PENDING, "Pending dequeue acked")	\
  _(PSH_PENDING, "PSH pending")			\
  _(FINRCVD, "FIN received")			\
  _(RATE_SAMPLE, "Conn does rate sampling")	\
  _(TRACK_BURST, "Track burst")			\
  _(ZERO_RWND_SENT, "Zero RWND sent")		\

typedef enum _tcp_connection_flag_bits
{
#define _(sym, str) TCP_CONN_##sym##_BIT,
  foreach_tcp_connection_flag
#undef _
  TCP_CONN_N_FLAG_BITS
} tcp_connection_flag_bits_e;

typedef enum _tcp_connection_flag
{
#define _(sym, str) TCP_CONN_##sym = 1 << TCP_CONN_##sym##_BIT,
  foreach_tcp_connection_flag
#undef _
  TCP_CONN_N_FLAGS
} tcp_connection_flags_e;

#define TCP_SCOREBOARD_TRACE (0)
#define TCP_MAX_SACK_BLOCKS 256	/**< Max number of SACK blocks stored */
#define TCP_INVALID_SACK_HOLE_INDEX ((u32)~0)

typedef struct _scoreboard_trace_elt
{
  u32 start;
  u32 end;
  u32 ack;
  u32 snd_una_max;
  u32 group;
} scoreboard_trace_elt_t;

typedef struct _sack_scoreboard_hole
{
  u32 next;		/**< Index for next entry in linked list */
  u32 prev;		/**< Index for previous entry in linked list */
  u32 start;		/**< Start sequence number */
  u32 end;		/**< End sequence number */
  u8 is_lost;		/**< Mark hole as lost */
} sack_scoreboard_hole_t;

typedef struct _sack_scoreboard
{
  sack_scoreboard_hole_t *holes;	/**< Pool of holes */
  u32 head;				/**< Index of first entry */
  u32 tail;				/**< Index of last entry */
  u32 sacked_bytes;			/**< Number of bytes sacked in sb */
  u32 last_sacked_bytes;		/**< Number of bytes last sacked */
  u32 last_bytes_delivered;		/**< Sack bytes delivered to app */
  u32 high_sacked;			/**< Highest byte sacked (fack) */
  u32 high_rxt;				/**< Highest retransmitted sequence */
  u32 rescue_rxt;			/**< Rescue sequence number */
  u32 lost_bytes;			/**< Bytes lost as per RFC6675 */
  u32 last_lost_bytes;			/**< Number of bytes last lost */
  u32 cur_rxt_hole;			/**< Retransmitting from this hole */
  u8 is_reneging;

#if TCP_SCOREBOARD_TRACE
  scoreboard_trace_elt_t *trace;
#endif

} sack_scoreboard_t;

#if TCP_SCOREBOARD_TRACE
#define tcp_scoreboard_trace_add(_tc, _ack) 				\
{									\
    static u64 _group = 0;						\
    sack_scoreboard_t *_sb = &_tc->sack_sb;				\
    sack_block_t *_sack, *_sacks;					\
    scoreboard_trace_elt_t *_elt;					\
    int i;								\
    _group++;								\
    _sacks = _tc->rcv_opts.sacks;					\
    for (i = 0; i < vec_len (_sacks); i++) 				\
      {									\
	_sack = &_sacks[i];						\
	vec_add2 (_sb->trace, _elt, 1);					\
	_elt->start = _sack->start;					\
	_elt->end = _sack->end;						\
	_elt->ack = _elt->end == _ack ? _ack : 0;			\
	_elt->snd_una_max = _elt->end == _ack ? _tc->snd_una_max : 0;	\
	_elt->group = _group;						\
      }									\
}
#else
#define tcp_scoreboard_trace_add(_tc, _ack)
#endif

sack_scoreboard_hole_t *scoreboard_next_rxt_hole (sack_scoreboard_t * sb,
						  sack_scoreboard_hole_t *
						  start, u8 have_sent_1_smss,
						  u8 * can_rescue,
						  u8 * snd_limited);
sack_scoreboard_hole_t *scoreboard_get_hole (sack_scoreboard_t * sb,
					     u32 index);

sack_scoreboard_hole_t *scoreboard_next_hole (sack_scoreboard_t * sb,
					      sack_scoreboard_hole_t * hole);
sack_scoreboard_hole_t *scoreboard_prev_hole (sack_scoreboard_t * sb,
					      sack_scoreboard_hole_t * hole);
sack_scoreboard_hole_t *scoreboard_first_hole (sack_scoreboard_t * sb);
sack_scoreboard_hole_t *scoreboard_last_hole (sack_scoreboard_t * sb);
void scoreboard_clear (sack_scoreboard_t * sb);
void scoreboard_init (sack_scoreboard_t * sb);
u8 *format_tcp_scoreboard (u8 * s, va_list * args);

#define TCP_BTS_INVALID_INDEX	((u32)~0)

typedef enum tcp_bts_flags_
{
  TCP_BTS_IS_RXT = 1,
  TCP_BTS_IS_APP_LIMITED = 1 << 1,
} __clib_packed tcp_bts_flags_t;

typedef struct tcp_bt_sample_
{
  u32 next;			/**< Next sample index in list */
  u32 prev;			/**< Previous sample index in list */
  u32 min_seq;			/**< Min seq number in sample */
  u32 max_seq;			/**< Max seq number. Set for rxt samples */
  u64 delivered;		/**< Total delivered bytes for sample */
  f64 delivered_time;		/**< Delivered time when sample taken */
  f64 tx_time;			/**< Transmit time for the burst */
  f64 first_tx_time;		/**< Connection first tx time at tx */
  tcp_bts_flags_t flags;	/**< Sample flag */
} tcp_bt_sample_t;

typedef struct tcp_rate_sample_
{
  u64 prior_delivered;		/**< Delivered of sample used for rate, i.e.,
				     total bytes delivered at prior_time */
  f64 prior_time;		/**< Delivered time of sample used for rate */
  f64 interval_time;		/**< Time to ack the bytes delivered */
  f64 rtt_time;			/**< RTT for sample */
  u32 delivered;		/**< Bytes delivered in interval_time */
  u32 acked_and_sacked;		/**< Bytes acked + sacked now */
  u32 lost;			/**< Bytes lost now */
  tcp_bts_flags_t flags;	/**< Rate sample flags from bt sample */
} tcp_rate_sample_t;

typedef struct tcp_byte_tracker_
{
  tcp_bt_sample_t *samples;	/**< Pool of samples */
  rb_tree_t sample_lookup;	/**< Rbtree for sample lookup by min_seq */
  u32 head;			/**< Head of samples linked list */
  u32 tail;			/**< Tail of samples linked list */
  u32 last_ooo;			/**< Cached last ooo sample */
} tcp_byte_tracker_t;

typedef enum _tcp_cc_algorithm_type
{
  TCP_CC_NEWRENO,
  TCP_CC_CUBIC,
  TCP_CC_LAST = TCP_CC_CUBIC
} tcp_cc_algorithm_type_e;

typedef struct _tcp_cc_algorithm tcp_cc_algorithm_t;

typedef enum _tcp_cc_ack_t
{
  TCP_CC_ACK,
  TCP_CC_DUPACK,
  TCP_CC_PARTIALACK
} tcp_cc_ack_t;

typedef enum tcp_cc_event_
{
  TCP_CC_EVT_START_TX,
} tcp_cc_event_t;

/*
 * As per RFC4898 tcpEStatsStackSoftErrors
 */
typedef struct tcp_errors_
{
  u32 below_data_wnd;	/**< All data in seg is below snd_una */
  u32 above_data_wnd;	/**< Some data in segment is above snd_wnd */
  u32 below_ack_wnd;	/**< Acks for data below snd_una */
  u32 above_ack_wnd;	/**< Acks for data not sent */
} tcp_errors_t;

typedef struct _tcp_connection
{
  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
  transport_connection_t connection;  /**< Common transport data. First! */

  u8 state;			/**< TCP state as per tcp_state_t */
  u8 is_tso;	  /** is connection could use tso */
  u16 flags;			/**< Connection flags (see tcp_conn_flags_e) */
  u32 timers[TCP_N_TIMERS];	/**< Timer handles into timer wheel */

  u64 segs_in;		/** RFC4022/4898 tcpHCInSegs/tcpEStatsPerfSegsIn */
  u64 bytes_in;		/** RFC4898 tcpEStatsPerfHCDataOctetsIn */
  u64 segs_out;		/** RFC4898 tcpEStatsPerfSegsOut */
  u64 bytes_out;	/** RFC4898 tcpEStatsPerfHCDataOctetsOut */

  /** Send sequence variables RFC793 */
  u32 snd_una;		/**< oldest unacknowledged sequence number */
  u32 snd_una_max;	/**< newest unacknowledged sequence number + 1*/
  u32 snd_wnd;		/**< send window */
  u32 snd_wl1;		/**< seq number used for last snd.wnd update */
  u32 snd_wl2;		/**< ack number used for last snd.wnd update */
  u32 snd_nxt;		/**< next seq number to be sent */
  u16 snd_mss;		/**< Effective send max seg (data) size */

  u64 data_segs_in;	/** RFC4898 tcpEStatsPerfDataSegsIn */
  u64 data_segs_out;	/** RFC4898 tcpEStatsPerfDataSegsOut */

  /** Receive sequence variables RFC793 */
  u32 rcv_nxt;		/**< next sequence number expected */
  u32 rcv_wnd;		/**< receive window we expect */

  u32 rcv_las;		/**< rcv_nxt at last ack sent/rcv_wnd update */
  u32 iss;		/**< initial sent sequence */
  u32 irs;		/**< initial remote sequence */

  /* Options */
  u8 snd_opts_len;		/**< Tx options len */
  u8 rcv_wscale;		/**< Window scale to advertise to peer */
  u8 snd_wscale;		/**< Window scale to use when sending */
  u32 tsval_recent;		/**< Last timestamp received */
  u32 tsval_recent_age;		/**< When last updated tstamp_recent*/
  tcp_options_t snd_opts;	/**< Tx options for connection */
  tcp_options_t rcv_opts;	/**< Rx options for connection */

  sack_block_t *snd_sacks;	/**< Vector of SACKs to send. XXX Fixed size? */
  u8 snd_sack_pos;		/**< Position in vec of first block to send */
  sack_block_t *snd_sacks_fl;	/**< Vector for building new list */
  sack_scoreboard_t sack_sb;	/**< SACK "scoreboard" that tracks holes */

  u16 rcv_dupacks;	/**< Number of recent DUPACKs received */
  u32 dupacks_in;	/**< RFC4898 tcpEStatsStackDupAcksIn*/
  u8 pending_dupacks;	/**< Number of DUPACKs to be sent */
  u32 dupacks_out;	/**< RFC4898 tcpEStatsPathDupAcksOut */

  /* Congestion control */
  u32 cwnd;		/**< Congestion window */
  u32 cwnd_acc_bytes;	/**< Bytes accumulated for cwnd increment */
  u32 ssthresh;		/**< Slow-start threshold */
  u32 prev_ssthresh;	/**< ssthresh before congestion */
  u32 prev_cwnd;	/**< ssthresh before congestion */
  u32 bytes_acked;	/**< Bytes acknowledged by current segment */
  u32 burst_acked;	/**< Bytes acknowledged in current burst */
  u32 snd_rxt_bytes;	/**< Retransmitted bytes */
  u32 snd_rxt_ts;	/**< Timestamp when first packet is retransmitted */
  u32 tsecr_last_ack;	/**< Timestamp echoed to us in last healthy ACK */
  u32 snd_congestion;	/**< snd_una_max when congestion is detected */
  u32 tx_fifo_size;	/**< Tx fifo size. Used to constrain cwnd */
  tcp_cc_algorithm_t *cc_algo;	/**< Congestion control algorithm */
  u8 cc_data[TCP_CC_DATA_SZ];	/**< Congestion control algo private data */

  u32 fr_occurences;	/**< fast-retransmit occurrences RFC4898
			     tcpEStatsStackFastRetran */
  u32 tr_occurences;	/**< timer-retransmit occurrences */
  u64 bytes_retrans;	/**< RFC4898 tcpEStatsPerfOctetsRetrans */
  u64 segs_retrans;	/**< RFC4898 tcpEStatsPerfSegsRetrans*/

  /* RTT and RTO */
  u32 rto;		/**< Retransmission timeout */
  u32 rto_boff;		/**< Index for RTO backoff */
  u32 srtt;		/**< Smoothed RTT */
  u32 rttvar;		/**< Smoothed mean RTT difference. Approximates variance */
  u32 rtt_seq;		/**< Sequence number for tracked ACK */
  f64 rtt_ts;		/**< Timestamp for tracked ACK */
  f64 mrtt_us;		/**< High precision mrtt from tracked acks */

  u32 psh_seq;		/**< Add psh header for seg that includes this */
  u32 next_node_index;	/**< Can be used to control next node in output */
  u32 next_node_opaque;	/**< Opaque to pass to next node */
  u32 limited_transmit;	/**< snd_nxt when limited transmit starts */
  u32 sw_if_index;	/**< Interface for the connection */

  /* Delivery rate estimation */
  u64 delivered;		/**< Total bytes delivered to peer */
  u64 app_limited;		/**< Delivered when app-limited detected */
  f64 delivered_time;		/**< Time last bytes were acked */
  f64 first_tx_time;		/**< Send time for recently delivered/sent */
  tcp_byte_tracker_t *bt;	/**< Tx byte tracker */

  tcp_errors_t errors;	/**< Soft connection errors */

  f64 start_ts;		/**< Timestamp when connection initialized */
  u32 last_fib_check;	/**< Last time we checked fib route for peer */
  u16 mss;		/**< Our max seg size that includes options */
  u32 timestamp_delta;	/**< Offset for timestamp */
} tcp_connection_t;

/* *INDENT-OFF* */
struct _tcp_cc_algorithm
{
  const char *name;
  uword (*unformat_cfg) (unformat_input_t * input);
  void (*init) (tcp_connection_t * tc);
  void (*cleanup) (tcp_connection_t * tc);
  void (*rcv_ack) (tcp_connection_t * tc, tcp_rate_sample_t *rs);
  void (*rcv_cong_ack) (tcp_connection_t * tc, tcp_cc_ack_t ack,
			tcp_rate_sample_t *rs);
  void (*congestion) (tcp_connection_t * tc);
  void (*loss) (tcp_connection_t * tc);
  void (*recovered) (tcp_connection_t * tc);
  void (*undo_recovery) (tcp_connection_t * tc);
  void (*event) (tcp_connection_t *tc, tcp_cc_event_t evt);
  u64 (*get_pacing_rate) (tcp_connection_t *tc);
};
/* *INDENT-ON* */

#define tcp_fastrecovery_on(tc) (tc)->flags |= TCP_CONN_FAST_RECOVERY
#define tcp_fastrecovery_off(tc) (tc)->flags &= ~TCP_CONN_FAST_RECOVERY
#define tcp_recovery_on(tc) (tc)->flags |= TCP_CONN_RECOVERY
#define tcp_recovery_off(tc) (tc)->flags &= ~TCP_CONN_RECOVERY
#define tcp_in_fastrecovery(tc) ((tc)->flags & TCP_CONN_FAST_RECOVERY)
#define tcp_in_recovery(tc) ((tc)->flags & (TCP_CONN_RECOVERY))
#define tcp_in_slowstart(tc) (tc->cwnd < tc->ssthresh)
#define tcp_disconnect_pending(tc) ((tc)->flags & TCP_CONN_DCNT_PENDING)
#define tcp_disconnect_pending_on(tc) ((tc)->flags |= TCP_CONN_DCNT_PENDING)
#define tcp_disconnect_pending_off(tc) ((tc)->flags &= ~TCP_CONN_DCNT_PENDING)
#define tcp_fastrecovery_first(tc) ((tc)->flags & TCP_CONN_FRXT_FIRST)
#define tcp_fastrecovery_first_on(tc) ((tc)->flags |= TCP_CONN_FRXT_FIRST)
#define tcp_fastrecovery_first_off(tc) ((tc)->flags &= ~TCP_CONN_FRXT_FIRST)

#define tcp_in_cong_recovery(tc) ((tc)->flags & 		\
	  (TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY))

always_inline void
tcp_cong_recovery_off (tcp_connection_t * tc)
{
  tc->flags &= ~(TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY);
  tcp_fastrecovery_first_off (tc);
}

#define tcp_zero_rwnd_sent(tc) ((tc)->flags & TCP_CONN_ZERO_RWND_SENT)
#define tcp_zero_rwnd_sent_on(tc) (tc)->flags |= TCP_CONN_ZERO_RWND_SENT
#define tcp_zero_rwnd_sent_off(tc) (tc)->flags &= ~TCP_CONN_ZERO_RWND_SENT

typedef enum _tcp_error
{
#define tcp_error(n,s) TCP_ERROR_##n,
#include <vnet/tcp/tcp_error.def>
#undef tcp_error
  TCP_N_ERROR,
} tcp_error_t;

typedef struct _tcp_lookup_dispatch
{
  u8 next, error;
} tcp_lookup_dispatch_t;

typedef struct tcp_worker_ctx_
{
  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
  /** worker time */
  u32 time_now;

  /** worker timer wheel */
  tw_timer_wheel_16t_2w_512sl_t timer_wheel;

  /** tx buffer free list */
  u32 *tx_buffers;

  /** tx frames for tcp 4/6 output nodes */
  vlib_frame_t *tx_frames[2];

  /** tx frames for ip 4/6 lookup nodes */
  vlib_frame_t *ip_lookup_tx_frames[2];

  /** vector of pending ack dequeues */
  u32 *pending_deq_acked;

  /** vector of pending disconnect notifications */
  u32 *pending_disconnects;

  /** convenience pointer to this thread's vlib main */
  vlib_main_t *vm;

    CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);

  /** cached 'on the wire' options for bursts */
  u8 cached_opts[40];

} tcp_worker_ctx_t;

typedef struct tcp_iss_seed_
{
  u64 first;
  u64 second;
} tcp_iss_seed_t;

typedef struct tcp_configuration_
{
  /** Max rx fifo size for a session (in bytes). It is used in to compute the
   *  rfc 7323 window scaling factor */
  u32 max_rx_fifo;

  /** Min rx fifo for a session (in bytes) */
  u32 min_rx_fifo;

  /** Default MTU to be used when establishing connections */
  u16 default_mtu;

  /** Initial CWND multiplier, which multiplies MSS to determine initial CWND.
   *  Set 0 to determine the initial CWND by another way */
  u16 initial_cwnd_multiplier;

  /** Enable tx pacing for new connections */
  u8 enable_tx_pacing;

  /** Default congestion control algorithm type */
  tcp_cc_algorithm_type_e cc_algo;

  /** Min rwnd, as number of snd_mss segments, for update ack to be sent after
   * a zero rwnd advertisement */
  u32 rwnd_min_update_ack;

  /** Delayed ack time (disabled) */
  u16 delack_time;

  /** Timer ticks to wait for close from app */
  u16 closewait_time;

  /** Timer ticks to wait in time-wait. Also known as 2MSL */
  u16 timewait_time;

  /** Timer ticks to wait in fin-wait1 to send fin and rcv fin-ack */
  u16 finwait1_time;

  /** Timer ticks to wait in last ack for ack */
  u16 lastack_time;

  /** Timer ticks to wait in fin-wait2 for fin */
  u16 finwait2_time;

  /** Timer ticks to wait in closing for fin ack */
  u16 closing_time;

  /** Timer ticks to wait before cleaning up the connection */
  u16 cleanup_time;

  /** Number of preallocated connections */
  u32 preallocated_connections;

  /** Number of preallocated half-open connections */
  u32 preallocated_half_open_connections;

  /** Vectors of src addresses. Optional unless one needs > 63K active-opens */
  ip4_address_t *ip4_src_addrs;
  ip6_address_t *ip6_src_addrs;

  /** Fault-injection. Debug only */
  f64 buffer_fail_fraction;
} tcp_configuration_t;

typedef struct _tcp_main
{
  /* Per-worker thread tcp connection pools */
  tcp_connection_t **connections;

  /* Pool of listeners. */
  tcp_connection_t *listener_pool;

  /** Dispatch table by state and flags */
  tcp_lookup_dispatch_t dispatch_table[TCP_N_STATES][64];

  u8 log2_tstamp_clocks_per_tick;
  f64 tstamp_ticks_per_clock;

  /** per-worker context */
  tcp_worker_ctx_t *wrk_ctx;

  /** Pool of half-open connections on which we've sent a SYN */
  tcp_connection_t *half_open_connections;
  clib_spinlock_t half_open_lock;

  /** vlib buffer size */
  u32 bytes_per_buffer;

  /** Seed used to generate random iss */
  tcp_iss_seed_t iss_seed;

  /** Congestion control algorithms registered */
  tcp_cc_algorithm_t *cc_algos;

  /** Hash table of cc algorithms by name */
  uword *cc_algo_by_name;

  /** Last cc algo registered */
  tcp_cc_algorithm_type_e cc_last_type;

  /** Flag that indicates if stack is on or off */
  u8 is_enabled;

  /** Flag that indicates if v4 punting is enabled */
  u8 punt_unknown4;

  /** Flag that indicates if v6 punting is enabled */
  u8 punt_unknown6;

  /** Rotor for v4 source addresses */
  u32 last_v4_addr_rotor;

  /** Rotor for v6 source addresses */
  u32 last_v6_addr_rotor;

  /** Protocol configuration */
  tcp_configuration_t cfg;
} tcp_main_t;

extern tcp_main_t tcp_main;
extern vlib_node_registration_t tcp4_input_node;
extern vlib_node_registration_t tcp6_input_node;
extern vlib_node_registration_t tcp4_output_node;
extern vlib_node_registration_t tcp6_output_node;
extern vlib_node_registration_t tcp4_established_node;
extern vlib_node_registration_t tcp6_established_node;
extern vlib_node_registration_t tcp4_syn_sent_node;
extern vlib_node_registration_t tcp6_syn_sent_node;
extern vlib_node_registration_t tcp4_rcv_process_node;
extern vlib_node_registration_t tcp6_rcv_process_node;
extern vlib_node_registration_t tcp4_listen_node;
extern vlib_node_registration_t tcp6_listen_node;

#define tcp_cfg tcp_main.cfg
#define tcp_node_index(node_id, is_ip4) 				\
  ((is_ip4) ? tcp4_##node_id##_node.index : tcp6_##node_id##_node.index)

always_inline tcp_main_t *
vnet_get_tcp_main ()
{
  return &tcp_main;
}

always_inline tcp_worker_ctx_t *
tcp_get_worker (u32 thread_index)
{
  return &tcp_main.wrk_ctx[thread_index];
}

always_inline tcp_header_t *
tcp_buffer_hdr (vlib_buffer_t * b)
{
  ASSERT ((signed) b->current_data >= (signed) -VLIB_BUFFER_PRE_DATA_SIZE);
  return (tcp_header_t *) (b->data + b->current_data
			   + vnet_buffer (b)->tcp.hdr_offset);
}

#if (VLIB_BUFFER_TRACE_TRAJECTORY)
#define tcp_trajectory_add_start(b, start)			\
{								\
    (*vlib_buffer_trace_trajectory_cb) (b, start);		\
}
#else
#define tcp_trajectory_add_start(b, start)
#endif

clib_error_t *vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en);

void tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);

always_inline tcp_connection_t *
tcp_connection_get (u32 conn_index, u32 thread_index)
{
  if (PREDICT_FALSE
      (pool_is_free_index (tcp_main.connections[thread_index], conn_index)))
    return 0;
  return pool_elt_at_index (tcp_main.connections[thread_index], conn_index);
}

always_inline tcp_connection_t *
tcp_connection_get_if_valid (u32 conn_index, u32 thread_index)
{
  if (tcp_main.connections[thread_index] == 0)
    return 0;
  if (pool_is_free_index (tcp_main.
}
# Release Notes    {#release_notes}

* @subpage release_notes_1804
* @subpage release_notes_18012
* @subpage release_notes_18011
* @subpage release_notes_1801
* @subpage release_notes_1710
* @subpage release_notes_1707
* @subpage release_notes_1704
* @subpage release_notes_17011
* @subpage release_notes_1701
* @subpage release_notes_1609
* @subpage release_notes_1606

@page release_notes_1807 Release notes for VPP 18.07

More than 533 commits since the 18.04 release.

## Features

### Infrastructure
- DPDK 18.02.1
  - Complete rework of the dpdk-input node
  - Display rx/tx burst function name in "show hardware detail"
  - Improve buffer alloc perfomance
      - This is ~50% improvement in buffer alloc performance.  For a 256 buffer allocation, it was ~10 clocks/buffer, now is < 5 clocks.
  - Add per-numa page allocation info to 'show memory'
  - Vectorized bihash_{48,40,24,16}_8 key compare
      - bihash_48_8 case:
          - Scalar code: 6 clocks
          - SSE4.2 code: 3 clocks
          - AVX2 code: 2.27 clocks
          - AVX512 code: 1.5 clocks
  - Pollable Stats
     - Stats are now available to a client in a shared memory segment and
       in the form of a directory, allowing very high performance polling
       of stats without directly querying VPP.

### VNET & Plugins
- IGMP improvements
  - Enable/Disable an interface for IGMP
  - improve logging
  - refactor common code
  - no orphaned timers
  - IGMP state changes in main thread only
  - Large groups split over multiple state-change reports
  - SSM range configuration API.
  - more tests
- IP: vectorized IP checksum
- VXLAN : HW offload RX flow
- Rework kube-proxy into LB plugin and add NATA66
- NAT:
    - Code refactor
    - Syslog
    - Multiple outside interfaces
    - Endpoint dependent filtering and mapping
- ACL:
    - Tuple Merge algorithm cleanup and integration
    - Processing pipeline optimizations
    - Refactoring
- Experimental AVF driver

### Host stack

- Session: performance improvements, add support for connectionless transports, datagram reception and transmission
- TCP: congestion control improvements and overall fixes
- UDP: datagram mode
- TLS async support


## Known issues

For the full list of issues please refer to fd.io [JIRA](https://jira.fd.io).

## Issues fixed

For the full list of fixed issues please refer to:
- fd.io [JIRA](https://jira.fd.io)
- git [commit log](https://git.fd.io/vpp/log/?h=stable/1807)

## API changes

Description of results:

* _Definition changed_: indicates that the API file was modified between releases.
* _Only in image_: indicates the API is new for this release.
* _Only in file_: indicates the API has been removed in this release.

                        Message Name                         Result
abf_itf_attach_add_del                                       definition changed
abf_itf_attach_details                                       only in image
abf_itf_attach_dump                                          only in image
abf_plugin_get_version                                       definition changed
abf_policy_add_del                                           definition changed
abf_policy_details                                           only in image
abf_policy_dump                                              only in image
af_packet_details                                            only in image
af_packet_dump                                               only in image
avf_create                                                   definition changed
avf_delete                                                   definition changed
bind_sock_reply                                              definition changed
bind_uri_reply                                               definition changed
dhcp6_client_enable_disable                                  definition changed
dhcp6_clients_enable_disable                                 definition changed
dhcp6_duid_ll_set                                            definition changed
dhcp6_pd_client_enable_disable                               definition changed
dhcp6_pd_reply_event                                         only in image
dhcp6_pd_send_client_message                                 definition changed
dhcp6_reply_event                                            only in image
dhcp6_send_client_message                                    definition changed
dhcp_client_config                                           definition changed
dhcp_client_details                                          only in image
dhcp_client_dump                                             only in image
dhcp_compl_event                                             definition changed
dslite_address_details                                       only in image
dslite_address_dump                                          only in image
gbp_endpoint_group_add_del                                   definition changed
gbp_endpoint_group_details                                   only in image
gbp_endpoint_group_dump                                      only in image
gbp_recirc_add_del                                           definition changed
gbp_recirc_details                                           only in image
gbp_recirc_dump                                              only in image
gbp_subnet_add_del                                           definition changed
gbp_subnet_details                                           only in image
gbp_subnet_dump                                              only in image
hw_interface_set_mtu                                         definition changed
igmp_details                                                 definition changed
igmp_dump                                                    definition changed
igmp_enable_disable                                          definition changed
igmp_event                                                   definition changed
igmp_group_prefix_details                                    only in image
igmp_group_prefix_dump                                       only in image
igmp_group_prefix_set                                        definition changed
igmp_listen                                                  definition changed
ikev2_profile_set_auth                                       definition changed
ikev2_profile_set_id                                         definition changed
ip6_add_del_address_using_prefix                             definition changed
ip_mroute_add_del                                            definition changed
ip_probe_neighbor                                            definition changed
ip_scan_neighbor_enable_disable                              definition changed
ip_unnumbered_details                                        only in image
ip_unnumbered_dump                                           only in image
ipip_6rd_add_tunnel                                          definition changed
ipip_add_tunnel                                              definition changed
ipip_tunnel_details                                          definition changed
ipsec_sa_details                                             definition changed
ipsec_sad_add_del_entry                                      definition changed
ipsec_tunnel_if_add_del                                      definition changed
kp_add_del_pod                                               definition changed
kp_add_del_vip                                               definition changed
kp_conf                                                      definition changed
lb_add_del_vip                                               definition changed
mactime_add_del                                              definition changed
mactime_enable                                               definition changed
memclnt_create                                               definition changed
memclnt_create_reply                                         definition changed
memfd_segment_create                                         definition changed
nat44_add_del_lb_static_mapping                              definition changed
nat44_add_del_static_mapping                                 definition changed
nat44_del_session                                            definition changed
nat44_lb_static_mapping_details                              definition changed
nat44_static_mapping_details                                 definition changed
nat44_user_session_details                                   definition changed
pipe_create                                                  definition changed
pipe_delete                                                  definition changed
pipe_details                                                 only in image
pipe_dump                                                    only in image
pot_profile_activate                                         definition changed
pot_profile_add                                              definition changed
pot_profile_del                                              definition changed
proxy_arp_add_del                                            definition changed
proxy_arp_details                                            only in image
proxy_arp_dump                                               only in image
proxy_arp_intfc_details                                      only in image
proxy_arp_intfc_dump                                         only in image
sock_init_shm_reply                                          definition changed
sockclnt_create                                              definition changed
sockclnt_create_reply                                        definition changed
sr_localsid_add_del                                          definition changed
sr_localsids_details                                         definition changed
sr_policies_details                                          only in image
sr_policies_dump                                             only in image
sr_policy_add                                                definition changed
sr_policy_del                                                definition changed
sr_policy_mod                                                definition changed
sr_steering_pol_details                                      only in image
sr_steering_pol_dump                                         only in image
sw_interface_details                                         definition changed
sw_interface_set_mtu                                         definition changed
tap_create_v2                                                definition changed
vnet_bier_neighbor_counters                                  only in image
vnet_get_summary_stats_reply                                 definition changed
vxlan_offload_rx                                             definition changed
want_bier_neighbor_stats                                     definition changed
want_dhcp6_pd_reply_events                                   definition changed
want_dhcp6_reply_events                                      definition changed
Found 107 api message signature differences

### Patches that changed API definitions

| @c src/plugins/ioam/lib-pot/pot.api ||
| ------- | ------- |
| [e9fcf23](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=e9fcf23) | Fix some build warnings about "Old Style VLA" |

| @c src/plugins/gbp/gbp.api ||
| ------- | ------- |
| [25b0494](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=25b0494) | GBP V2 |

| @c src/plugins/map/map.api ||
| ------- | ------- |
| [381e9a9](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=381e9a9) | MAP: Move MAP-E/T to a plugin. |

| @c src/plugins/igmp/igmp.api ||
| ------- | ------- |
| [947ea62](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=947ea62) | IGMP improvements |

| @c src/plugins/lb/lb.api ||
| ------- | ------- |
| [d92a0b5](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=d92a0b5) | Rework kube-proxy into LB plugin |

| @c src/plugins/nat/nat.api ||
| ------- | ------- |
| [70a26ac](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=70a26ac) | NAT44: nat44_del_session and nat44_user_session_details API update (VPP-1271) |
| [ebdf190](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=ebdf190) | NAT44: TCP connection close detection (VPP-1266) |
| [1e5c07d](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=1e5c07d) | Add special Twice-NAT feature (VPP-1221) |
| [16aa7f8](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=16aa7f8) | DSLite: Implement new API call DSLITE_ADDRESS_DUMP. |

| @c src/plugins/avf/avf.api ||
| ------- | ------- |
| [258a189](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=258a189) | avf: api fix |
| [6c9b964](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=6c9b964) | avf: binary API and configurable RX/TX queue size |

| @c src/plugins/mactime/mactime.api ||
| ------- | ------- |
| [7055e26](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=7055e26) | Driver level time-based src mac filter |

| @c src/plugins/abf/abf.api ||
| ------- | ------- |
| [669d07d](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=669d07d) | ACL based forwarding |

| @c src/vlibmemory/memclnt.api ||
| ------- | ------- |
| [dab732a](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=dab732a) | VPP-1335 vapi crash when memclnt_keepalive received |
| [7895872](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=7895872) | Remove the historical memfd api segment bootstrap |

| @c src/vpp/stats/stats.api ||
| ------- | ------- |
| [a21a367](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=a21a367) | VPP-1324 SIGSEGV vl_msg_api_handler_with_vm_node() |
| [586479a](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=586479a) | BIER neighbor stats |
| [e906aac](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=e906aac) | STATS: Separate socket for fd exchange. |
| [048a4e5](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=048a4e5) | export counters in a memfd segment |

| @c src/vnet/interface.api ||
| ------- | ------- |
| [d723161](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=d723161) | MTU: Software interface / Per-protocol MTU support |
| [fe7d4a2](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=fe7d4a2) | Revert "MTU: Setting of MTU on software interface (instead of hardware interface)" |
| [70083ee](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=70083ee) | MTU: Setting of MTU on software interface (instead of hardware interface) |

| @c src/vnet/ipfix-export/ipfix_export.api ||
| ------- | ------- |
| [a9855ef](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=a9855ef) | Flow: Rename IPFIX exporter. |

| @c src/vnet/dhcp/dhcp6_pd_client_cp.api ||
| ------- | ------- |
| [81119e8](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=81119e8) | Implement DHCPv6 PD client (VPP-718, VPP-1050) |

| @c src/vnet/dhcp/dhcp.api ||
| ------- | ------- |
| [dd3b8f7](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=dd3b8f7) | Implement DHCPv6 IA NA client (VPP-1094) |
| [d9778c2](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=d9778c2) | Update DHCPv6 DUID code and fix coverity warnings |
| [81119e8](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=81119e8) | Implement DHCPv6 PD client (VPP-718, VPP-1050) |
| [daff178](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=daff178) | DHCP Client Dump |

| @c src/vnet/dhcp/dhcp6_ia_na_client_cp.api ||
| ------- | ------- |
| [dd3b8f7](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=dd3b8f7) | Implement DHCPv6 IA NA client (VPP-1094) |

| @c src/vnet/ip/ip.api ||
| ------- | ------- |
| [947ea62](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=947ea62) | IGMP improvements |
| [7eaaf74](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=7eaaf74) | proxy_arp: remove unused is_add |
| [0053de6](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=0053de6) | ARP proxy dumps |
| [9e2f915](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=9e2f915) | IP unnumbered dump |
| [7f358b3](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=7f358b3) | Periodic scan and probe of IP neighbors to maintain neighbor pools |
| [e821ab1](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=e821ab1) | IP mcast: allow unicast address as a next-hop |
| [c7b4304](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=c7b4304) | Implement ip_probe_neighbor API |

| @c src/vnet/ip/ip_types.api ||
| ------- | ------- |
| [947ea62](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=947ea62) | IGMP improvements |
| [2c2feab](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=2c2feab) | VPPAPIGEN: Add union and enum support and IP4/IP6 address type. |

| @c src/vnet/devices/af_packet/af_packet.api ||
| ------- | ------- |
| [04e0bb2](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=04e0bb2) | af_packet: Add support for dump interfaces |

| @c src/vnet/devices/tap/tapv2.api ||
| ------- | ------- |
| [d600ffe](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=d600ffe) | Update tapv2 documentation |
| [0b06111](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=0b06111) | VPP-1305: Add support for tags |

| @c src/vnet/devices/pipe/pipe.api ||
| ------- | ------- |
| [ee8b973](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=ee8b973) | VOM: support for pipes |
| [17ff3c1](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=17ff3c1) | Pipes |

| @c src/vnet/ipip/ipip.api ||
| ------- | ------- |
| [d57f636](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=d57f636) | VPP-1277: IPIP - Copy TOS/TC from inner packet to outer. |

| @c src/vnet/session/session.api ||
| ------- | ------- |
| [7fb0fe1](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=7fb0fe1) | udp/session: refactor to support dgram mode |

| @c src/vnet/ipsec/ipsec.api ||
| ------- | ------- |
| [4b089f2](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=4b089f2) | ipsec: support UDP encap/decap for NAT traversal |
| [e9fcf23](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=e9fcf23) | Fix some build warnings about "Old Style VLA" |
| [8e1039a](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=8e1039a) | Allow an IPsec tunnel interface to be renumbered |

| @c src/vnet/vxlan/vxlan.api ||
| ------- | ------- |
| [af86a48](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=af86a48) | vxlan:offload RX flow |

| @c src/vnet/srv6/sr.api ||
| ------- | ------- |
| [3337bd2](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=3337bd2) | Fixed bugs in SRv6 API |
| [e9fcf23](https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commit;h=e9fcf23) | Fix some build warnings about "Old Style VLA" |



@page release_notes_1804 Release notes for VPP 18.04

More than 570 commits since the 18.01 release.

## Features

### Infrastructure
- DPDK 18.02.1
- ARM aarch64 integrated into CI

### VNET & Plugins
- ERSPAN
- L3DSR load balancing support
- VPC bonding / LACP
- IPv4/IPv6 packet reassembly
- IPv6 link-local support
- Asymmetrical static NAT
- 464XLAT for NAT44
- MAP-T CE support
- Intel Adaptive Virtual Function native device driver plugin
- Marvell device plugin
- SRv6 static, dynamic and masquerading proxy plugins
- MPLS Uniform mode
- IGMP plugin
- IPIP tunnel support (IPv4/IPv6 over IPv4/IPv6)
- IPv6 Router Discovery mechanism

### VLIB
- ARM-optimized library variations for key functions
- Better handling of physmem on non-NUMA kernels

### Host stack
- TLS support via OpenSSL or mbedtls software engines
- Session layer can utilize both shm and memfd (secure) FIFO segments
- STCP
- VCL logging / tracing

### API framework
- New API definition compiler (vppapigen)
- Memory (shm) and socket APIs refactored
- API handlers refactored to make them transport (shared memory or socket)
    agnostic
- Improved support for bootstrapping of the shm API with memfd segments
    over the socket API

### Packaging
- SELinux for RPM builds
- Debuginfo RPMs
- ARM aarch64 for Ubuntu

## Known issues

For the full list of issues please refer to fd.io [JIRA](https://jira.fd.io).

## Issues fixed

For the full list of fixed issues please refer to:
- fd.io [JIRA](https://jira.fd.io)
- git [commit log](https://git.fd.io/vpp/log/?h=stable/1804)

## API changes

Description of results:

* _Definition changed_: indicates that the API file was modified between releases.
* _Only in image_: indicates the API is new for this release.
* _Only in file_: indicates the API has been removed in this release.

Message Name                                                 | Results
------------------------------------------------------------ | ----------------
accept_session                                               | definition changed
accept_session_reply                                         | definition changed
acl_add_replace                                              | definition changed
acl_add_replace_reply                                        | definition changed
acl_del                                                      | definition changed
acl_del_reply                                                | definition changed
acl_details                                                  | definition changed
acl_dump                                                     | definition changed
acl_interface_add_del                                        | definition changed
acl_interface_add_del_reply                                  | definition changed
acl_interface_etype_whitelist_details                        | only in image
acl_interface_etype_whitelist_dump                           | only in image
acl_interface_list_details                                   | definition changed
acl_interface_list_dump                                      | definition changed
acl_interface_set_acl_list                                   | definition changed
acl_interface_set_acl_list_reply                             | definition changed
acl_interface_set_etype_whitelist                            | definition changed
acl_plugin_control_ping                                      | definition changed
acl_plugin_control_ping_reply                                | definition changed
acl_plugin_get_version                                       | definition changed
acl_plugin_get_version_reply                                 | definition changed
add_node_next                                                | definition changed
add_node_next_reply                                          | definition changed
af_packet_create                                             | definition changed
af_packet_create_reply                                       | definition changed
af_packet_delete                                             | definition changed
af_packet_delete_reply                                       | definition changed
af_packet_set_l4_cksum_offload                               | definition changed
af_packet_set_l4_cksum_offload_reply                         | definition changed
api_versions                                                 | definition changed
api_versions_reply                                           | definition changed
app_namespace_add_del                                        | definition changed
app_namespace_add_del_reply                                  | definition changed
application_attach                                           | definition changed
application_attach_reply                                     | definition changed
application_detach                                           | definition changed
application_detach_reply                                     | definition changed
application_tls_cert_add                                     | definition changed
application_tls_key_add                                      | definition changed
bd_ip_mac_add_del                                            | definition changed
bd_ip_mac_add_del_reply                                      | definition changed
bfd_auth_del_key                                             | definition changed
bfd_auth_del_key_reply                                       | definition changed
bfd_auth_keys_details                                        | definition changed
bfd_auth_keys_dump                                           | definition changed
bfd_auth_set_key                                             | definition changed
bfd_auth_set_key_reply                                       | definition changed
bfd_udp_add                                                  | definition changed
bfd_udp_add_reply                                            | definition changed
bfd_udp_auth_activate                                        | definition changed
bfd_udp_auth_activate_reply                                  | definition changed
bfd_udp_auth_deactivate                                      | definition changed
bfd_udp_auth_deactivate_reply                                | definition changed
bfd_udp_del                                                  | definition changed
bfd_udp_del_echo_source                                      | definition changed
bfd_udp_del_echo_source_reply                                | definition changed
bfd_udp_del_reply                                            | definition changed
bfd_udp_mod                                                  | definition changed
bfd_udp_mod_reply                                            | definition changed
bfd_udp_session_details                                      | definition changed
bfd_udp_session_dump                                         | definition changed
bfd_udp_session_set_flags                                    | definition changed
bfd_udp_session_set_flags_reply                              | definition changed
bfd_udp_set_echo_source                                      | definition changed
bfd_udp_set_echo_source_reply                                | definition changed
bier_disp_entry_add_del                                      | definition changed
bier_disp_entry_add_del_reply                                | definition changed
bier_disp_entry_details                                      | definition changed
bier_disp_entry_dump                                         | definition changed
bier_disp_table_add_del                                      | definition changed
bier_disp_table_add_del_reply                                | definition changed
bier_disp_table_details                                      | definition changed
bier_disp_table_dump                                         | definition changed
bier_imp_add                                                 | definition changed
bier_imp_add_reply                                           | definition changed
bier_imp_del                                                 | definition changed
bier_imp_del_reply                                           | definition changed
bier_imp_details                                             | definition changed
bier_imp_dump                                                | definition changed
bier_route_add_del                                           | definition changed
bier_route_add_del_reply                                     | definition changed
bier_route_details                                           | definition changed
bier_route_dump                                              | definition changed
bier_table_add_del                                           | definition changed
bier_table_add_del_reply                                     | definition changed
bier_table_details                                           | definition changed
bier_table_dump                                              | definition changed
bind_sock                                                    | definition changed
bind_sock_reply                                              | definition changed
bind_uri                                                     | definition changed
bind_uri_reply                                               | definition changed
bond_create                                                  | definition changed
bond_delete                                                  | definition changed
bond_detach_slave                                            | definition changed
bond_enslave                                                 | definition changed
bridge_domain_add_del                                        | definition changed
bridge_domain_add_del_reply                                  | definition changed
bridge_domain_details                                        | definition changed
bridge_domain_dump                                           | definition changed
bridge_domain_set_mac_age                                    | definition changed
bridge_domain_set_mac_age_reply                              | definition changed
bridge_flags                                                 | definition changed
bridge_flags_reply                                           | definition changed
cdp_enable                                                   | definition changed
classify_add_del_session                                     | definition changed
classify_add_del_session_reply                               | definition changed
classify_add_del_table                                       | definition changed
classify_add_del_table_reply                                 | definition changed
classify_session_details                                     | definition changed
classify_session_dump                                        | definition changed
classify_set_interface_ip_table                              | definition changed
classify_set_interface_ip_table_reply                        | definition changed
classify_set_interface_l2_tables                             | definition changed
classify_set_interface_l2_tables_reply                       | definition changed
classify_table_by_interface                                  | definition changed
classify_table_by_interface_reply                            | definition changed
classify_table_ids                                           | definition changed
classify_table_ids_reply                                     | definition changed
classify_table_info                                          | definition changed
classify_table_info_reply                                    | definition changed
cli                                                          | definition changed
cli_inband                                                   | definition changed
cli_inband_reply                                             | definition changed
cli_reply                                                    | definition changed
collect_detailed_interface_stats                             | definition changed
connect_session                                              | definition changed
connect_session_reply                                        | definition changed
connect_sock                                                 | definition changed
connect_sock_reply                                           | definition changed
connect_uri                                                  | definition changed
connect_uri_reply                                            | definition changed
control_ping                                                 | definition changed
control_ping_reply                                           | definition changed
cop_interface_enable_disable                                 | definition changed
cop_interface_enable_disable_reply                           | definition changed
cop_whitelist_enable_disable                                 | definition changed
cop_whitelist_enable_disable_reply                           | definition changed
create_loopback                                              | definition changed
create_loopback_instance                                     | definition changed
create_loopback_instance_reply                               | definition changed
create_loopback_reply                                        | definition changed
create_subif                                                 | definition changed
create_subif_reply                                           | definition changed
create_vhost_user_if                                         | definition changed
create_vhost_user_if_reply                                   | definition changed
create_vlan_subif                                            | definition changed
create_vlan_subif_reply                                      | definition changed
delete_loopback                                              | definition changed
delete_loopback_reply                                        | definition changed
delete_subif                                                 | definition changed
delete_subif_reply                                           | definition changed
delete_vhost_user_if                                         | definition changed
delete_vhost_user_if_reply                                   | definition changed
dhcp_client_config                                           | definition changed
dhcp_client_config_reply                                     | definition changed
dhcp_compl_event                                             | definition changed
dhcp_proxy_config                                            | definition changed
dhcp_proxy_config_reply                                      | definition changed
dhcp_proxy_details                                           | definition changed
dhcp_proxy_dump                                              | definition changed
dhcp_proxy_set_vss                                           | definition changed
dhcp_proxy_set_vss_reply                                     | definition changed
disconnect_session                                           | definition changed
disconnect_session_reply                                     | definition changed
dns_enable_disable                                           | definition changed
dns_enable_disable_reply                                     | definition changed
dns_name_server_add_del                                      | definition changed
dns_name_server_add_del_reply                                | definition changed
dns_resolve_ip                                               | definition changed
dns_resolve_ip_reply                                         | definition changed
dns_resolve_name                                             | definition changed
dns_resolve_name_reply                                       | definition changed
dslite_add_del_pool_addr_range                               | definition changed
dslite_add_del_pool_addr_range_reply                         | definition changed
dslite_get_aftr_addr                                         | definition changed
dslite_get_b4_addr                                           | definition changed
dslite_set_aftr_addr                                         | definition changed
dslite_set_aftr_addr_reply                                   | definition changed
dslite_set_b4_addr                                           | definition changed
feature_enable_disable                                       | definition changed
feature_enable_disable_reply                                 | definition changed
flow_classify_details                                        | definition changed
flow_classify_dump                                           | definition changed
flow_classify_set_interface                                  | definition changed
flow_classify_set_interface_reply                            | definition changed
flowprobe_params                                             | definition changed
flowprobe_params_reply                                       | definition changed
flowprobe_tx_interface_add_del                               | definition changed
flowprobe_tx_interface_add_del_reply                         | definition changed
gbp_contract_add_del                                         | definition changed
gbp_contract_details                                         | only in image
gbp_contract_dump                                            | only in image
gbp_endpoint_add_del                                         | definition changed
gbp_endpoint_details                                         | only in image
gbp_endpoint_dump                                            | only in image
geneve_add_del_tunnel                                        | definition changed
geneve_add_del_tunnel_reply                                  | definition changed
geneve_tunnel_details                                        | definition changed
geneve_tunnel_dump                                           | definition changed
get_first_msg_id                                             | definition changed
get_first_msg_id_reply                                       | definition changed
get_next_index                                               | definition changed
get_next_index_reply                                         | definition changed
get_node_graph                                               | definition changed
get_node_graph_reply                                         | definition changed
get_node_index                                               | definition changed
get_node_index_reply                                         | definition changed
gpe_add_del_fwd_entry                                        | definition changed
gpe_add_del_fwd_entry_reply                                  | definition changed
gpe_add_del_iface                                            | definition changed
gpe_add_del_iface_reply                                      | definition changed
gpe_add_del_native_fwd_rpath                                 | definition changed
gpe_add_del_native_fwd_rpath_reply                           | definition changed
gpe_enable_disable                                           | definition changed
gpe_enable_disable_reply                                     | definition changed
gpe_fwd_entries_get                                          | definition changed
gpe_fwd_entries_get_reply                                    | definition changed
gpe_fwd_entry_path_details                                   | definition changed
gpe_fwd_entry_path_dump                                      | definition changed
gpe_fwd_entry_vnis_get                                       | definition changed
gpe_fwd_entry_vnis_get_reply                                 | definition changed
gpe_get_encap_mode                                           | definition changed
gpe_get_encap_mode_reply                                     | definition changed
gpe_native_fwd_rpaths_get                                    | definition changed
gpe_native_fwd_rpaths_get_reply                              | definition changed
gpe_set_encap_mode                                           | definition changed
gpe_set_encap_mode_reply                                     | definition changed
gre_add_del_tunnel                                           | definition changed
gre_add_del_tunnel_reply                                     | definition changed
gre_tunnel_details                                           | definition changed
gre_tunnel_dump                                              | definition changed
gtpu_add_del_tunnel                                          | definition changed
gtpu_add_del_tunnel_reply                                    | definition changed
gtpu_tunnel_details                                          | definition changed
gtpu_tunnel_dump                                             | definition changed
igmp_clear_interface                                         | definition changed
igmp_details                                                 | only in image
igmp_dump                                                    | only in image
igmp_enable_disable                                          | definition changed
igmp_event                                                   | only in image
igmp_listen                                                  | definition changed
ikev2_initiate_del_child_sa                                  | definition changed
ikev2_initiate_del_child_sa_reply                            | definition changed
ikev2_initiate_del_ike_sa                                    | definition changed
ikev2_initiate_del_ike_sa_reply                              | definition changed
ikev2_initiate_rekey_child_sa                                | definition changed
ikev2_initiate_rekey_child_sa_reply                          | definition changed
ikev2_initiate_sa_init                                       | definition changed
ikev2_initiate_sa_init_reply                                 | definition changed
ikev2_profile_add_del                                        | definition changed
ikev2_profile_add_del_reply                                  | definition changed
ikev2_profile_set_auth                                       | definition changed
ikev2_profile_set_auth_reply                                 | definition changed
ikev2_profile_set_id                                         | definition changed
ikev2_profile_set_id_reply                                   | definition changed
ikev2_profile_set_ts                                         | definition changed
ikev2_profile_set_ts_reply                                   | definition changed
ikev2_set_esp_transforms                                     | definition changed
ikev2_set_esp_transforms_reply                               | definition changed
ikev2_set_ike_transforms                                     | definition changed
ikev2_set_ike_transforms_reply                               | definition changed
ikev2_set_local_key                                          | definition changed
ikev2_set_local_key_reply                                    | definition changed
ikev2_set_responder                                          | definition changed
ikev2_set_responder_reply                                    | definition changed
ikev2_set_sa_lifetime                                        | definition changed
ikev2_set_sa_lifetime_reply                                  | definition changed
input_acl_set_interface                                      | definition changed
input_acl_set_interface_reply                                | definition changed
interface_name_renumber                                      | definition changed
interface_name_renumber_reply                                | definition changed
ioam_cache_ip6_enable_disable                                | definition changed
ioam_cache_ip6_enable_disable_reply                          | definition changed
ioam_disable                                                 | definition changed
ioam_disable_reply                                           | definition changed
ioam_enable                                                  | definition changed
ioam_enable_reply                                            | definition changed
ioam_export_ip6_enable_disable                               | definition changed
ioam_export_ip6_enable_disable_reply                         | definition changed
ip4_arp_event                                                | definition changed
ip6_fib_details                                              | definition changed
ip6_fib_dump                                                 | definition changed
ip6_mfib_details                                             | definition changed
ip6_mfib_dump                                                | definition changed
ip6_nd_address_autoconfig                                    | definition changed
ip6_nd_event                                                 | definition changed
ip6_ra_event                                                 | only in image
ip6nd_proxy_add_del                                          | definition changed
ip6nd_proxy_add_del_reply                                    | definition changed
ip6nd_proxy_details                                          | definition changed
ip6nd_proxy_dump                                             | definition changed
ip6nd_send_router_solicitation                               | definition changed
ip_add_del_route                                             | definition changed
ip_add_del_route_reply                                       | definition changed
ip_address_details                                           | definition changed
ip_address_dump                                              | definition changed
ip_container_proxy_add_del                                   | definition changed
ip_container_proxy_add_del_reply                             | definition changed
ip_details                                                   | definition changed
ip_dump                                                      | definition changed
ip_fib_details                                               | definition changed
ip_fib_dump                                                  | definition changed
ip_mfib_details                                              | definition changed
ip_mfib_dump                                                 | definition changed
ip_mroute_add_del                                            | definition changed
ip_mroute_add_del_reply                                      | definition changed
ip_neighbor_add_del                                          | definition changed
ip_neighbor_add_del_reply                                    | definition changed
ip_neighbor_details                                          | definition changed
ip_neighbor_dump                                             | definition changed
ip_punt_police                                               | definition changed
ip_punt_police_reply                                         | definition changed
ip_punt_redirect                                             | definition changed
ip_punt_redirect_reply                                       | definition changed
ip_reassembly_enable_disable                                 | definition changed
ip_reassembly_get                                            | definition changed
ip_reassembly_set                                            | definition changed
ip_source_and_port_range_check_add_del                       | definition changed
ip_source_and_port_range_check_add_del_reply                 | definition changed
ip_source_and_port_range_check_interface_add_del             | definition changed
ip_source_and_port_range_check_interface_add_del_reply       | definition changed
ip_table_add_del                                             | definition changed
ip_table_add_del_reply                                       | definition changed
ipfix_classify_stream_details                                | definition changed
ipfix_classify_stream_dump                                   | definition changed
ipfix_classify_table_add_del                                 | definition changed
ipfix_classify_table_add_del_reply                           | definition changed
ipfix_classify_table_details                                 | definition changed
ipfix_classify_table_dump                                    | definition changed
ipfix_exporter_details                                       | definition changed
ipfix_exporter_dump                                          | definition changed
ipip_6rd_add_tunnel                                          | definition changed
ipip_6rd_del_tunnel                                          | definition changed
ipip_add_tunnel                                              | definition changed
ipip_del_tunnel                                              | definition changed
ipip_tunnel_details                                          | only in image
ipip_tunnel_dump                                             | only in image
ipsec_gre_add_del_tunnel                                     | definition changed
ipsec_gre_add_del_tunnel_reply                               | definition changed
ipsec_gre_tunnel_details                                     | definition changed
ipsec_gre_tunnel_dump                                        | definition changed
ipsec_interface_add_del_spd                                  | definition changed
ipsec_interface_add_del_spd_reply                            | definition changed
ipsec_sa_details                                             | definition changed
ipsec_sa_dump                                                | definition changed
ipsec_sa_set_key                                             | definition changed
ipsec_sa_set_key_reply                                       | definition changed
ipsec_sad_add_del_entry                                      | definition changed
ipsec_sad_add_del_entry_reply                                | definition changed
ipsec_spd_add_del                                            | definition changed
ipsec_spd_add_del_entry                                      | definition changed
ipsec_spd_add_del_entry_reply                                | definition changed
ipsec_spd_add_del_reply                                      | definition changed
ipsec_spd_details                                            | definition changed
ipsec_spd_dump                                               | definition changed
ipsec_tunnel_if_add_del                                      | definition changed
ipsec_tunnel_if_add_del_reply                                | definition changed
ipsec_tunnel_if_set_key                                      | definition changed
ipsec_tunnel_if_set_key_reply                                | definition changed
ipsec_tunnel_if_set_sa                                       | definition changed
ipsec_tunnel_if_set_sa_reply                                 | definition changed
kp_add_del_pod                                               | definition changed
kp_add_del_pod_reply                                         | definition changed
kp_add_del_vip                                               | definition changed
kp_add_del_vip_reply                                         | definition changed
kp_conf                                                      | definition changed
kp_conf_reply                                                | definition changed
l2_emulation                                                 | definition changed
l2_emulation_reply                                           | definition changed
l2_fib_clear_table                                           | definition changed
l2_fib_clear_table_reply                                     | definition changed
l2_fib_table_details                                         | definition changed
l2_fib_table_dump                                            | definition changed
l2_flags                                                     | definition changed
l2_flags_reply                                               | definition changed
l2_interface_efp_filter                                      | definition changed
l2_interface_efp_filter_reply                                | definition changed
l2_interface_pbb_tag_rewrite                                 | definition changed
l2_interface_pbb_tag_rewrite_reply                           | definition changed
l2_interface_vlan_tag_rewrite                                | definition changed
l2_interface_vlan_tag_rewrite_reply                          | definition changed
l2_macs_event                                                | definition changed
l2_patch_add_del                                             | definition changed
l2_patch_add_del_reply                                       | definition changed
l2_xconnect_details                                          | definition changed
l2_xconnect_dump                                             | definition changed
l2fib_add_del                                                | definition changed
l2fib_add_del_reply                                          | definition changed
l2fib_flush_all                                              | definition changed
l2fib_flush_all_reply                                        | definition changed
l2fib_flush_bd                                               | definition changed
l2fib_flush_bd_reply                                         | definition changed
l2fib_flush_int                                              | definition changed
l2fib_flush_int_reply                                        | definition changed
l2tpv3_create_tunnel                                         | definition changed
l2tpv3_create_tunnel_reply                                   | definition changed
l2tpv3_interface_enable_disable                              | definition changed
l2tpv3_interface_enable_disable_reply                        | definition changed
l2tpv3_set_lookup_key                                        | definition changed
l2tpv3_set_lookup_key_reply                                  | definition changed
l2tpv3_set_tunnel_cookies                                    | definition changed
l2tpv3_set_tunnel_cookies_reply                              | definition changed
lb_add_del_as                                                | definition changed
lb_add_del_as_reply                                          | definition changed
lb_add_del_vip                                               | definition changed
lb_add_del_vip_reply                                         | definition changed
lb_conf                                                      | definition changed
lb_conf_reply                                                | definition changed
lisp_add_del_adjacency                                       | definition changed
lisp_add_del_adjacency_reply                                 | definition changed
lisp_add_del_local_eid                                       | definition changed
lisp_add_del_local_eid_reply                                 | definition changed
lisp_add_del_locator                                         | definition changed
lisp_add_del_locator_reply                                   | definition changed
lisp_add_del_locator_set                                     | definition changed
lisp_add_del_locator_set_reply                               | definition changed
lisp_add_del_map_request_itr_rlocs                           | definition changed
lisp_add_del_map_request_itr_rlocs_reply                     | definition changed
lisp_add_del_map_resolver                                    | definition changed
lisp_add_del_map_resolver_reply                              | definition changed
lisp_add_del_map_server                                      | definition changed
lisp_add_del_map_server_reply                                | definition changed
lisp_add_del_remote_mapping                                  | definition changed
lisp_add_del_remote_mapping_reply                            | definition changed
lisp_adjacencies_get                                         | definition changed
lisp_adjacencies_get_reply                                   | definition changed
lisp_eid_table_add_del_map                                   | definition changed
lisp_eid_table_add_del_map_reply                             | definition changed
lisp_eid_table_details                                       | definition changed
lisp_eid_table_dump                                          | definition changed
lisp_eid_table_map_details                                   | definition changed
lisp_eid_table_map_dump                                      | definition changed
lisp_eid_table_vni_details                                   | definition changed
lisp_eid_table_vni_dump                                      | definition changed
lisp_enable_disable                                          | definition changed
lisp_enable_disable_reply                                    | definition changed
lisp_get_map_request_itr_rlocs                               | definition changed
lisp_get_map_request_itr_rlocs_reply                         | definition changed
lisp_locator_details                                         | definition changed
lisp_locator_dump                                            | definition changed
lisp_locator_set_details                                     | definition changed
lisp_locator_set_dump                                        | definition changed
lisp_map_register_enable_disable                             | definition changed
lisp_map_register_enable_disable_reply                       | definition changed
lisp_map_request_mode                                        | definition changed
lisp_map_request_mode_reply                                  | definition changed
lisp_map_resolver_details                                    | definition changed
lisp_map_resolver_dump                                       | definition changed
lisp_map_server_details                                      | definition changed
lisp_map_server_dump                                         | definition changed
lisp_pitr_set_locator_set                                    | definition changed
lisp_pitr_set_locator_set_reply                              | definition changed
lisp_rloc_probe_enable_disable                               | definition changed
lisp_rloc_probe_enable_disable_reply                         | definition changed
lisp_use_petr                                                | definition changed
lisp_use_petr_reply                                          | definition changed
lldp_config                                                  | definition changed
lldp_config_reply                                            | definition changed
macip_acl_add                                                | definition changed
macip_acl_add_replace                                        | definition changed
macip_acl_add_replace_reply                                  | definition changed
macip_acl_add_reply                                          | definition changed
macip_acl_del                                                | definition changed
macip_acl_del_reply                                          | definition changed
macip_acl_details                                            | definition changed
macip_acl_dump                                               | definition changed
macip_acl_interface_add_del                                  | definition changed
macip_acl_interface_add_del_reply                            | definition changed
macip_acl_interface_get                                      | definition changed
macip_acl_interface_get_reply                                | definition changed
macip_acl_interface_list_details                             | definition changed
macip_acl_interface_list_dump                                | definition changed
map_add_del_rule                                             | definition changed
map_add_del_rule_reply                                       | definition changed
map_add_domain                                               | definition changed
map_add_domain_reply                                         | definition changed
map_another_segment                                          | definition changed
map_another_segment_reply                                    | definition changed
map_del_domain                                               | definition changed
map_del_domain_reply                                         | definition changed
map_domain_details                                           | definition changed
map_domain_dump                                              | definition changed
map_rule_details                                             | definition changed
map_rule_dump                                                | definition changed
map_summary_stats                                            | definition changed
map_summary_stats_reply                                      | definition changed
memclnt_create                                               | definition changed
memclnt_create_reply                                         | definition changed
memclnt_delete                                               | definition changed
memclnt_delete_reply                                         | definition changed
memclnt_keepalive                                            | definition changed
memclnt_keepalive_reply                                      | definition changed
memclnt_read_timeout                                         | definition changed
memclnt_rx_thread_suspend