#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_types.h>
+#include <vnet/tcp/tcp_timer.h>
#include <vnet/tcp/tcp_debug.h>
+#include <vnet/tcp/tcp_sack.h>
+#include <vnet/tcp/tcp_bt.h>
+#include <vnet/tcp/tcp_cc.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_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 void (timer_expiration_handler) (tcp_connection_t * tc);
-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 snd_una_adv; /**< Bytes to add to snd_una */
- 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 */
-
-#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 */
- u64 tx_rate; /**< Tx pacing rate */
- 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 */
- u64 tx_rate; /**< Tx pacing rate */
- 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 */
- 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 */
- 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,
u8 next, error;
} tcp_lookup_dispatch_t;
+#define foreach_tcp_wrk_stat \
+ _(timer_expirations, u64, "timer expirations") \
+ _(rxt_segs, u64, "segments retransmitted") \
+ _(tr_events, u32, "timer retransmit events") \
+ _(to_closewait, u32, "timeout close-wait") \
+ _(to_closewait2, u32, "timeout close-wait w/data") \
+ _(to_finwait1, u32, "timeout fin-wait-1") \
+ _(to_finwait2, u32, "timeout fin-wait-2") \
+ _(to_lastack, u32, "timeout last-ack") \
+ _(to_closing, u32, "timeout closing") \
+ _(tr_abort, u32, "timer retransmit abort") \
+ _(rst_unread, u32, "reset on close due to unread data") \
+ _(no_buffer, u32, "out of buffers") \
+
+typedef struct tcp_wrk_stats_
+{
+#define _(name, type, str) type name;
+ foreach_tcp_wrk_stat
+#undef _
+} tcp_wrk_stats_t;
+
+typedef struct tcp_free_req_
+{
+ clib_time_type_t free_time;
+ u32 connection_index;
+} tcp_cleanup_req_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];
+ /** worker's pool of connections */
+ tcp_connection_t *connections;
/** vector of pending ack dequeues */
u32 *pending_deq_acked;
/** vector of pending disconnect notifications */
u32 *pending_disconnects;
+ /** vector of pending reset notifications */
+ u32 *pending_resets;
+
/** convenience pointer to this thread's vlib main */
vlib_main_t *vm;
+ /** Time used for high precision (us) measurements in seconds */
+ f64 time_us;
+
+ /** Time measured in @ref TCP_TSTAMP_TICK used for time stamps */
+ u32 time_tstamp;
+
+ /* Max timers to be handled per dispatch loop */
+ u32 max_timers_per_loop;
+
+ /* Fifo of pending timer expirations */
+ u32 *pending_timers;
+
CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
/** cached 'on the wire' options for bursts */
u8 cached_opts[40];
+ /** tx buffer free list */
+ u32 *tx_buffers;
+
+ /* fifo of pending free requests */
+ tcp_cleanup_req_t *pending_cleanups;
+
+ /** Session layer edge indices to tcp output */
+ u32 tco_next_node[2];
+
+ /** worker timer wheel */
+ tcp_timer_wheel_t timer_wheel;
+
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline2);
+
+ tcp_wrk_stats_t stats;
} tcp_worker_ctx_t;
+#define tcp_worker_stats_inc(_wrk,_stat,_val) \
+ _wrk->stats._stat += _val
+
typedef struct tcp_iss_seed_
{
u64 first;
/** Enable tx pacing for new connections */
u8 enable_tx_pacing;
+ /** Allow use of TSO whenever available */
+ u8 allow_tso;
+
+ /** Set if csum offloading is enabled */
+ u8 csum_offload;
+
/** Default congestion control algorithm type */
tcp_cc_algorithm_type_e cc_algo;
- /** Delayed ack time (disabled) */
- u16 delack_time;
+ /** Min rwnd, as number of snd_mss segments, for update ack to be sent after
+ * a zero rwnd advertisement */
+ u32 rwnd_min_update_ack;
/** Timer ticks to wait for close from app */
- u16 closewait_time;
+ u32 closewait_time;
/** Timer ticks to wait in time-wait. Also known as 2MSL */
- u16 timewait_time;
+ u32 timewait_time;
/** Timer ticks to wait in fin-wait1 to send fin and rcv fin-ack */
- u16 finwait1_time;
+ u32 finwait1_time;
/** Timer ticks to wait in last ack for ack */
- u16 lastack_time;
+ u32 lastack_time;
/** Timer ticks to wait in fin-wait2 for fin */
- u16 finwait2_time;
+ u32 finwait2_time;
/** Timer ticks to wait in closing for fin ack */
- u16 closing_time;
+ u32 closing_time;
- /** Timer ticks to wait before cleaning up the connection */
- u16 cleanup_time;
+ /** Time to wait (sec) before cleaning up the connection */
+ f32 cleanup_time;
/** Number of preallocated connections */
u32 preallocated_connections;
/** Number of preallocated half-open connections */
u32 preallocated_half_open_connections;
+ /** Maxium allowed GSO packet size */
+ u32 max_gso_size;
+
/** Vectors of src addresses. Optional unless one needs > 63K active-opens */
ip4_address_t *ip4_src_addrs;
ip6_address_t *ip6_src_addrs;
typedef struct _tcp_main
{
- /* Per-worker thread tcp connection pools */
- tcp_connection_t **connections;
+ /** per-worker context */
+ tcp_worker_ctx_t *wrk_ctx;
/* Pool of listeners. */
tcp_connection_t *listener_pool;
+ /** vlib buffer size */
+ u32 bytes_per_buffer;
+
+ /** Session layer edge indices to ip lookup (syns, rst) */
+ u32 ipl_next_node[2];
+
/** 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;
+ clib_spinlock_t half_open_lock;
/** 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;
always_inline tcp_worker_ctx_t *
tcp_get_worker (u32 thread_index)
{
+ ASSERT (thread_index < vec_len (tcp_main.wrk_ctx));
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) \
{ \
#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.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_get_connection_from_transport (transport_connection_t * tconn)
-{
- return (tcp_connection_t *) tconn;
-}
-
-always_inline void
-tcp_connection_set_state (tcp_connection_t * tc, tcp_state_t state)
-{
- tc->state = state;
- TCP_EVT (TCP_EVT_STATE_CHANGE, tc);
-}
-
-void tcp_connection_close (tcp_connection_t * tc);
-void tcp_connection_cleanup (tcp_connection_t * tc);
-void tcp_connection_del (tcp_connection_t * tc);
-int tcp_half_open_connection_cleanup (tcp_connection_t * tc);
tcp_connection_t *tcp_connection_alloc (u8 thread_index);
tcp_connection_t *tcp_connection_alloc_w_base (u8 thread_index,
tcp_connection_t * base);
void tcp_connection_free (tcp_connection_t * tc);
-void tcp_connection_reset (tcp_connection_t * tc);
-int tcp_configure_v4_source_address_range (vlib_main_t * vm,
- ip4_address_t * start,
- ip4_address_t * end, u32 table_id);
-int tcp_configure_v6_source_address_range (vlib_main_t * vm,
- ip6_address_t * start,
- ip6_address_t * end, u32 table_id);
-void tcp_api_reference (void);
-u8 *format_tcp_connection (u8 * s, va_list * args);
-
-always_inline tcp_connection_t *
-tcp_listener_get (u32 tli)
-{
- return pool_elt_at_index (tcp_main.listener_pool, tli);
-}
-
-always_inline tcp_connection_t *
-tcp_half_open_connection_get (u32 conn_index)
-{
- tcp_connection_t *tc = 0;
- clib_spinlock_lock_if_init (&tcp_main.half_open_lock);
- if (!pool_is_free_index (tcp_main.half_open_connections, conn_index))
- tc = pool_elt_at_index (tcp_main.half_open_connections, conn_index);
- clib_spinlock_unlock_if_init (&tcp_main.half_open_lock);
- return tc;
-}
+void tcp_connection_close (tcp_connection_t * tc);
+void tcp_connection_cleanup (tcp_connection_t * tc);
+void tcp_connection_del (tcp_connection_t * tc);
+int tcp_half_open_connection_cleanup (tcp_connection_t * tc);
-void tcp_make_fin (tcp_connection_t * tc, vlib_buffer_t * b);
-void tcp_make_synack (tcp_connection_t * ts, vlib_buffer_t * b);
void tcp_send_reset_w_pkt (tcp_connection_t * tc, vlib_buffer_t * pkt,
u32 thread_index, u8 is_ip4);
void tcp_send_reset (tcp_connection_t * tc);
void tcp_send_syn (tcp_connection_t * tc);
void tcp_send_synack (tcp_connection_t * tc);
void tcp_send_fin (tcp_connection_t * tc);
-void tcp_update_burst_snd_vars (tcp_connection_t * tc);
-void tcp_update_rto (tcp_connection_t * tc);
-void tcp_flush_frame_to_output (tcp_worker_ctx_t * wrk, u8 is_ip4);
-void tcp_flush_frames_to_output (tcp_worker_ctx_t * wrk);
+void tcp_send_ack (tcp_connection_t * tc);
void tcp_send_window_update_ack (tcp_connection_t * tc);
void tcp_program_ack (tcp_connection_t * tc);
void tcp_program_dupack (tcp_connection_t * tc);
-void tcp_program_fastretransmit (tcp_connection_t * tc);
-
-/*
- * Rate estimation
- */
-
-/**
- * Byte tracker initialize
- *
- * @param tc connection for which the byte tracker should be allocated and
- * initialized
- */
-void tcp_bt_init (tcp_connection_t * tc);
-/**
- * Byte tracker cleanup
- *
- * @param tc connection for which the byte tracker should be cleaned up
- */
-void tcp_bt_cleanup (tcp_connection_t * tc);
-/**
- * Flush byte tracker samples
- *
- * @param tc tcp connection for which samples should be flushed
- */
-void tcp_bt_flush_samples (tcp_connection_t * tc);
-/**
- * Track a tcp tx burst
- *
- * @param tc tcp connection
- */
-void tcp_bt_track_tx (tcp_connection_t * tc);
-/**
- * Track a tcp retransmission
- *
- * @param tc tcp connection
- * @param start start sequence number
- * @param end end sequence number
- */
-void tcp_bt_track_rxt (tcp_connection_t * tc, u32 start, u32 end);
-/**
- * Generate a delivery rate sample from recently acked bytes
- *
- * @param tc tcp connection
- * @param rs resulting rate sample
- */
-void tcp_bt_sample_delivery_rate (tcp_connection_t * tc,
- tcp_rate_sample_t * rs);
-/**
- * Check if sample to be generated is app limited
- *
- * @param tc tcp connection
- */
-void tcp_bt_check_app_limited (tcp_connection_t * tc);
-/**
- * Check if the byte tracker is in sane state
- *
- * Should be used only for testing
- *
- * @param bt byte tracker
- */
-int tcp_bt_is_sane (tcp_byte_tracker_t * bt);
-
-always_inline u32
-tcp_end_seq (tcp_header_t * th, u32 len)
-{
- return th->seq_number + tcp_is_syn (th) + tcp_is_fin (th) + len;
-}
-
-/* Modulo arithmetic for TCP sequence numbers */
-#define seq_lt(_s1, _s2) ((i32)((_s1)-(_s2)) < 0)
-#define seq_leq(_s1, _s2) ((i32)((_s1)-(_s2)) <= 0)
-#define seq_gt(_s1, _s2) ((i32)((_s1)-(_s2)) > 0)
-#define seq_geq(_s1, _s2) ((i32)((_s1)-(_s2)) >= 0)
-#define seq_max(_s1, _s2) (seq_gt((_s1), (_s2)) ? (_s1) : (_s2))
-
-/* Modulo arithmetic for timestamps */
-#define timestamp_lt(_t1, _t2) ((i32)((_t1)-(_t2)) < 0)
-#define timestamp_leq(_t1, _t2) ((i32)((_t1)-(_t2)) <= 0)
-
-/**
- * Our estimate of the number of bytes that have left the network
- */
-always_inline u32
-tcp_bytes_out (const tcp_connection_t * tc)
-{
- if (tcp_opts_sack_permitted (&tc->rcv_opts))
- return tc->sack_sb.sacked_bytes + tc->sack_sb.lost_bytes;
- else
- return tc->rcv_dupacks * tc->snd_mss;
-}
-
-/**
- * Our estimate of the number of bytes in flight (pipe size)
- */
-always_inline u32
-tcp_flight_size (const tcp_connection_t * tc)
-{
- int flight_size;
-
- flight_size = (int) (tc->snd_nxt - tc->snd_una) - tcp_bytes_out (tc)
- + tc->snd_rxt_bytes;
-
- if (flight_size < 0)
- {
- if (0)
- clib_warning
- ("Negative: %u %u %u dupacks %u sacked bytes %u flags %d",
- tc->snd_una_max - tc->snd_una, tcp_bytes_out (tc),
- tc->snd_rxt_bytes, tc->rcv_dupacks, tc->sack_sb.sacked_bytes,
- tc->rcv_opts.flags);
- return 0;
- }
-
- return flight_size;
-}
-
-/**
- * Initial cwnd as per RFC5681
- */
-always_inline u32
-tcp_initial_cwnd (const tcp_connection_t * tc)
-{
- if (tcp_cfg.initial_cwnd_multiplier > 0)
- return tcp_cfg.initial_cwnd_multiplier * tc->snd_mss;
-
- if (tc->snd_mss > 2190)
- return 2 * tc->snd_mss;
- else if (tc->snd_mss > 1095)
- return 3 * tc->snd_mss;
- else
- return 4 * tc->snd_mss;
-}
-
-/*
- * Accumulate acked bytes for cwnd increase
- *
- * Once threshold bytes are accumulated, snd_mss bytes are added
- * to the cwnd.
- */
-always_inline void
-tcp_cwnd_accumulate (tcp_connection_t * tc, u32 thresh, u32 bytes)
-{
- tc->cwnd_acc_bytes += bytes;
- if (tc->cwnd_acc_bytes >= thresh)
- {
- u32 inc = tc->cwnd_acc_bytes / thresh;
- tc->cwnd_acc_bytes -= inc * thresh;
- tc->cwnd += inc * tc->snd_mss;
- tc->cwnd = clib_min (tc->cwnd, tc->tx_fifo_size);
- }
-}
-
-always_inline u32
-tcp_loss_wnd (const tcp_connection_t * tc)
-{
- return tc->snd_mss;
-}
-
-always_inline u32
-tcp_available_snd_wnd (const tcp_connection_t * tc)
-{
- return clib_min (tc->cwnd, tc->snd_wnd);
-}
-
-always_inline u32
-tcp_available_output_snd_space (const tcp_connection_t * tc)
-{
- u32 available_wnd = tcp_available_snd_wnd (tc);
- int flight_size = (int) (tc->snd_nxt - tc->snd_una);
-
- if (available_wnd <= flight_size)
- return 0;
-
- return available_wnd - flight_size;
-}
-
-/**
- * Estimate of how many bytes we can still push into the network
- */
-always_inline u32
-tcp_available_cc_snd_space (const tcp_connection_t * tc)
-{
- u32 available_wnd = tcp_available_snd_wnd (tc);
- u32 flight_size = tcp_flight_size (tc);
-
- if (available_wnd <= flight_size)
- return 0;
-
- return available_wnd - flight_size;
-}
-
-always_inline u8
-tcp_is_lost_fin (tcp_connection_t * tc)
-{
- if ((tc->flags & TCP_CONN_FINSNT) && tc->snd_una_max - tc->snd_una == 1)
- return 1;
- return 0;
-}
+void tcp_program_retransmit (tcp_connection_t * tc);
+void tcp_update_burst_snd_vars (tcp_connection_t * tc);
u32 tcp_snd_space (tcp_connection_t * tc);
-int tcp_retransmit_first_unacked (tcp_worker_ctx_t * wrk,
- tcp_connection_t * tc);
-int tcp_fast_retransmit_no_sack (tcp_worker_ctx_t * wrk,
- tcp_connection_t * tc, u32 burst_size);
-int tcp_fast_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
- u32 burst_size);
-int tcp_fast_retransmit (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
- u32 burst_size);
-void tcp_cc_init_congestion (tcp_connection_t * tc);
-void tcp_cc_fastrecovery_clear (tcp_connection_t * tc);
-
+int tcp_fastrecovery_prr_snd_space (tcp_connection_t * tc);
+void tcp_reschedule (tcp_connection_t * tc);
fib_node_index_t tcp_lookup_rmt_in_fib (tcp_connection_t * tc);
-
-/* Made public for unit testing only */
-void tcp_update_sack_list (tcp_connection_t * tc, u32 start, u32 end);
-u32 tcp_sack_list_bytes (tcp_connection_t * tc);
-
-always_inline u32
-tcp_time_now (void)
-{
- return tcp_main.wrk_ctx[vlib_get_thread_index ()].time_now;
-}
-
-always_inline u32
-tcp_time_now_w_thread (u32 thread_index)
-{
- return tcp_main.wrk_ctx[thread_index].time_now;
-}
-
-/**
- * Generate timestamp for tcp connection
- */
-always_inline u32
-tcp_tstamp (tcp_connection_t * tc)
-{
- return (tcp_main.wrk_ctx[tc->c_thread_index].time_now -
- tc->timestamp_delta);
-}
-
-always_inline f64
-tcp_time_now_us (u32 thread_index)
-{
- return transport_time_now (thread_index);
-}
-
-always_inline u32
-tcp_set_time_now (tcp_worker_ctx_t * wrk)
-{
- wrk->time_now = clib_cpu_time_now () * tcp_main.tstamp_ticks_per_clock;
- return wrk->time_now;
-}
-
u32 tcp_session_push_header (transport_connection_t * tconn,
vlib_buffer_t * b);
-int tcp_session_custom_tx (void *conn, u32 max_burst_size);
+int tcp_session_custom_tx (void *conn, transport_send_params_t * sp);
void tcp_connection_timers_init (tcp_connection_t * tc);
void tcp_connection_timers_reset (tcp_connection_t * tc);
void tcp_connection_tx_pacer_update (tcp_connection_t * tc);
void tcp_connection_tx_pacer_reset (tcp_connection_t * tc, u32 window,
u32 start_bucket);
+void tcp_program_cleanup (tcp_worker_ctx_t * wrk, tcp_connection_t * tc);
+void tcp_check_gso (tcp_connection_t *tc);
-always_inline void
-tcp_cc_rcv_ack (tcp_connection_t * tc, tcp_rate_sample_t * rs)
-{
- tc->cc_algo->rcv_ack (tc, rs);
- tc->tsecr_last_ack = tc->rcv_opts.tsecr;
-}
-
-static inline void
-tcp_cc_rcv_cong_ack (tcp_connection_t * tc, tcp_cc_ack_t ack_type,
- tcp_rate_sample_t * rs)
-{
- tc->cc_algo->rcv_cong_ack (tc, ack_type, rs);
-}
-
-static inline void
-tcp_cc_loss (tcp_connection_t * tc)
-{
- tc->cc_algo->loss (tc);
-}
-
-static inline void
-tcp_cc_recovered (tcp_connection_t * tc)
-{
- tc->cc_algo->recovered (tc);
-}
-
-static inline void
-tcp_cc_undo_recovery (tcp_connection_t * tc)
-{
- if (tc->cc_algo->undo_recovery)
- tc->cc_algo->undo_recovery (tc);
-}
-
-static inline void
-tcp_cc_event (tcp_connection_t * tc, tcp_cc_event_t evt)
-{
- if (tc->cc_algo->event)
- tc->cc_algo->event (tc, evt);
-}
-
-static inline u64
-tcp_cc_get_pacing_rate (tcp_connection_t * tc)
-{
- if (tc->cc_algo->get_pacing_rate)
- return tc->cc_algo->get_pacing_rate (tc);
-
- f64 srtt = clib_min ((f64) tc->srtt * TCP_TICK, tc->mrtt_us);
- /* TODO should constrain to interface's max throughput but
- * we don't have link speeds for sw ifs ..*/
- return (tc->cwnd / srtt);
-}
-
-always_inline void
-tcp_timer_set (tcp_connection_t * tc, u8 timer_id, u32 interval)
-{
- ASSERT (tc->c_thread_index == vlib_get_thread_index ());
- ASSERT (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID);
- tc->timers[timer_id] =
- tw_timer_start_16t_2w_512sl (&tcp_main.
- wrk_ctx[tc->c_thread_index].timer_wheel,
- tc->c_c_index, timer_id, interval);
-}
-
-always_inline void
-tcp_timer_reset (tcp_connection_t * tc, u8 timer_id)
-{
- ASSERT (tc->c_thread_index == vlib_get_thread_index ());
- if (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID)
- return;
-
- tw_timer_stop_16t_2w_512sl (&tcp_main.
- wrk_ctx[tc->c_thread_index].timer_wheel,
- tc->timers[timer_id]);
- tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID;
-}
-
-always_inline void
-tcp_timer_update (tcp_connection_t * tc, u8 timer_id, u32 interval)
-{
- ASSERT (tc->c_thread_index == vlib_get_thread_index ());
- if (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID)
- tw_timer_update_16t_2w_512sl (&tcp_main.
- wrk_ctx[tc->c_thread_index].timer_wheel,
- tc->timers[timer_id], interval);
- else
- tc->timers[timer_id] =
- tw_timer_start_16t_2w_512sl (&tcp_main.
- wrk_ctx[tc->c_thread_index].timer_wheel,
- tc->c_c_index, timer_id, interval);
-}
-
-always_inline void
-tcp_retransmit_timer_set (tcp_connection_t * tc)
-{
- ASSERT (tc->snd_una != tc->snd_una_max);
- tcp_timer_set (tc, TCP_TIMER_RETRANSMIT,
- clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
-}
-
-always_inline void
-tcp_retransmit_timer_reset (tcp_connection_t * tc)
-{
- tcp_timer_reset (tc, TCP_TIMER_RETRANSMIT);
-}
-
-always_inline void
-tcp_retransmit_timer_force_update (tcp_connection_t * tc)
-{
- tcp_timer_update (tc, TCP_TIMER_RETRANSMIT,
- clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
-}
-
-always_inline void
-tcp_persist_timer_set (tcp_connection_t * tc)
-{
- /* Reuse RTO. It's backed off in handler */
- tcp_timer_set (tc, TCP_TIMER_PERSIST,
- clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
-}
-
-always_inline void
-tcp_persist_timer_update (tcp_connection_t * tc)
-{
- tcp_timer_update (tc, TCP_TIMER_PERSIST,
- clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
-}
-
-always_inline void
-tcp_persist_timer_reset (tcp_connection_t * tc)
-{
- tcp_timer_reset (tc, TCP_TIMER_PERSIST);
-}
+void tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
+int tcp_configure_v4_source_address_range (vlib_main_t * vm,
+ ip4_address_t * start,
+ ip4_address_t * end, u32 table_id);
+int tcp_configure_v6_source_address_range (vlib_main_t * vm,
+ ip6_address_t * start,
+ ip6_address_t * end, u32 table_id);
-always_inline void
-tcp_retransmit_timer_update (tcp_connection_t * tc)
-{
- if (tc->snd_una == tc->snd_nxt)
- {
- tcp_retransmit_timer_reset (tc);
- if (tc->snd_wnd < tc->snd_mss)
- tcp_persist_timer_update (tc);
- }
- else
- tcp_timer_update (tc, TCP_TIMER_RETRANSMIT,
- clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
-}
+clib_error_t *vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en);
-always_inline u8
-tcp_timer_is_active (tcp_connection_t * tc, tcp_timers_e timer)
-{
- return tc->timers[timer] != TCP_TIMER_HANDLE_INVALID;
-}
+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;
+format_function_t format_tcp_connection;
+format_function_t format_tcp_connection_id;
#define tcp_validate_txf_size(_tc, _a) \
ASSERT(_tc->state != TCP_STATE_ESTABLISHED \
|| transport_max_tx_dequeue (&_tc->connection) >= _a)
-void tcp_rcv_sacks (tcp_connection_t * tc, u32 ack);
-u8 *tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose);
-
-/**
- * Register exiting cc algo type
- */
-void tcp_cc_algo_register (tcp_cc_algorithm_type_e type,
- const tcp_cc_algorithm_t * vft);
-
-/**
- * Register new cc algo type
- */
-tcp_cc_algorithm_type_e tcp_cc_algo_new_type (const tcp_cc_algorithm_t * vft);
-tcp_cc_algorithm_t *tcp_cc_algo_get (tcp_cc_algorithm_type_e type);
-
-static inline void *
-tcp_cc_data (tcp_connection_t * tc)
-{
- return (void *) tc->cc_data;
-}
-
-void newreno_rcv_cong_ack (tcp_connection_t * tc, tcp_cc_ack_t ack_type,
- tcp_rate_sample_t * rs);
-
-/**
- * Push TCP header to buffer
- *
- * @param vm - vlib_main
- * @param b - buffer to write the header to
- * @param sp_net - source port net order
- * @param dp_net - destination port net order
- * @param seq - sequence number net order
- * @param ack - ack number net order
- * @param tcp_hdr_opts_len - header and options length in bytes
- * @param flags - header flags
- * @param wnd - window size
- *
- * @return - pointer to start of TCP header
- */
-always_inline void *
-vlib_buffer_push_tcp_net_order (vlib_buffer_t * b, u16 sp, u16 dp, u32 seq,
- u32 ack, u8 tcp_hdr_opts_len, u8 flags,
- u16 wnd)
-{
- tcp_header_t *th;
-
- th = vlib_buffer_push_uninit (b, tcp_hdr_opts_len);
-
- th->src_port = sp;
- th->dst_port = dp;
- th->seq_number = seq;
- th->ack_number = ack;
- th->data_offset_and_reserved = (tcp_hdr_opts_len >> 2) << 4;
- th->flags = flags;
- th->window = wnd;
- th->checksum = 0;
- th->urgent_pointer = 0;
- return th;
-}
-
-/**
- * Push TCP header to buffer
- *
- * @param b - buffer to write the header to
- * @param sp_net - source port net order
- * @param dp_net - destination port net order
- * @param seq - sequence number host order
- * @param ack - ack number host order
- * @param tcp_hdr_opts_len - header and options length in bytes
- * @param flags - header flags
- * @param wnd - window size
- *
- * @return - pointer to start of TCP header
- */
-always_inline void *
-vlib_buffer_push_tcp (vlib_buffer_t * b, u16 sp_net, u16 dp_net, u32 seq,
- u32 ack, u8 tcp_hdr_opts_len, u8 flags, u16 wnd)
-{
- return vlib_buffer_push_tcp_net_order (b, sp_net, dp_net,
- clib_host_to_net_u32 (seq),
- clib_host_to_net_u32 (ack),
- tcp_hdr_opts_len, flags,
- clib_host_to_net_u16 (wnd));
-}
-
#endif /* _vnet_tcp_h_ */
/*
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