X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Ftcp%2Ftcp.h;h=f4cc2c88e6248420656e13897445ace5b148ed17;hb=9f86d225ab4f3dccbf61383a75d6af7d321a204e;hp=8f2665d2a6a0e90ae11f543603dcab3496ea9fd6;hpb=26dd6de91b4d36ac04154c7eb6339684db6684a0;p=vpp.git diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h index 8f2665d2a6a..f4cc2c88e62 100644 --- a/src/vnet/tcp/tcp.h +++ b/src/vnet/tcp/tcp.h @@ -18,421 +18,21 @@ #include #include -#include -#include -#include #include +#include +#include #include +#include +#include +#include -#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_MAX_RX_FIFO_SIZE 32 << 20 -#define TCP_MIN_RX_FIFO_SIZE 4 << 10 -#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") \ - _(KEEP, "KEEP") \ - _(WAITCLOSE, "WAIT CLOSE") \ - _(RETRANSMIT_SYN, "RETRANSMIT SYN") \ - _(ESTABLISH, "ESTABLISH") \ - _(ESTABLISH_AO, "ESTABLISH_AO") \ - -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); +typedef void (timer_expiration_handler) (tcp_connection_t * tc); 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) - -/* Timer delays as multiples of 100ms */ -#define TCP_TO_TIMER_TICK TCP_TICK*10 /* Period for converting from TCP - * ticks to timer units */ -#define TCP_DELACK_TIME 1 /* 0.1s */ -#define TCP_ESTABLISH_TIME 750 /* 75s */ -#define TCP_SYN_RCVD_TIME 600 /* 60s */ -#define TCP_2MSL_TIME 300 /* 30s */ -#define TCP_CLOSEWAIT_TIME 20 /* 2s */ -#define TCP_TIMEWAIT_TIME 100 /* 10s */ -#define TCP_FINWAIT1_TIME 600 /* 60s */ -#define TCP_CLEANUP_TIME 1 /* 0.1s */ -#define TCP_TIMER_PERSIST_MIN 2 /* 0.2s */ - -#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 */ - -/** 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; - -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 */ - - /* TODO RFC4898 */ - - /** 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 */ - - /** 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 DUPACKs received */ - u8 pending_dupacks; /**< Number of DUPACKs to be sent */ - - /* 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 */ - - /* 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 */ - - u32 last_fib_check; /**< Last time we checked fib route for peer */ - u16 mss; /**< Our max seg size that includes options */ - u32 timestamp_delta; -} 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); -}; -/* *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, @@ -446,23 +46,38 @@ typedef struct _tcp_lookup_dispatch 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") \ + +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; @@ -470,97 +85,175 @@ typedef struct tcp_worker_ctx_ /** 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; + /** worker time */ + u32 time_now; + + /* Max timers to be handled per dispatch loop */ + u32 max_timers_per_loop; + + /** Session layer edge indices to tcp output */ + u32 tco_next_node[2]; + + /* 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; + + /** 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; u64 second; } tcp_iss_seed_t; -typedef struct _tcp_main +typedef struct tcp_configuration_ { - /* Per-worker thread tcp connection pools */ - tcp_connection_t **connections; + /** 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; - /* Pool of listeners. */ - tcp_connection_t *listener_pool; + /** Min rx fifo for a session (in bytes) */ + u32 min_rx_fifo; - /** Dispatch table by state and flags */ - tcp_lookup_dispatch_t dispatch_table[TCP_N_STATES][64]; + /** Default MTU to be used when establishing connections */ + u16 default_mtu; - u8 log2_tstamp_clocks_per_tick; - f64 tstamp_ticks_per_clock; + /** Initial CWND multiplier, which multiplies MSS to determine initial CWND. + * Set 0 to determine the initial CWND by another way */ + u16 initial_cwnd_multiplier; - /** per-worker context */ - tcp_worker_ctx_t *wrk_ctx; + /** Enable tx pacing for new connections */ + u8 enable_tx_pacing; - /* Pool of half-open connections on which we've sent a SYN */ - tcp_connection_t *half_open_connections; - clib_spinlock_t half_open_lock; + /** Allow use of TSO whenever available */ + u8 allow_tso; - /** vlib buffer size */ - u32 bytes_per_buffer; + /** Set if csum offloading is enabled */ + u8 csum_offload; - /* Seed used to generate random iss */ - tcp_iss_seed_t iss_seed; + /** Default congestion control algorithm type */ + tcp_cc_algorithm_type_e cc_algo; - /* Congestion control algorithms registered */ - tcp_cc_algorithm_t *cc_algos; + /** Min rwnd, as number of snd_mss segments, for update ack to be sent after + * a zero rwnd advertisement */ + u32 rwnd_min_update_ack; - /** Hash table of cc algorithms by name */ - uword *cc_algo_by_name; + /** Delayed ack time (disabled) */ + u16 delack_time; - /** Last cc algo registered */ - tcp_cc_algorithm_type_e cc_last_type; + /** Timer ticks to wait for close from app */ + u16 closewait_time; - /* - * Configuration - */ + /** Timer ticks to wait in time-wait. Also known as 2MSL */ + u16 timewait_time; - /* Flag that indicates if stack is on or off */ - u8 is_enabled; + /** Timer ticks to wait in fin-wait1 to send fin and rcv fin-ack */ + u16 finwait1_time; - /** Max rx fifo size for a session. It is used in to compute the - * rfc 7323 window scaling factor */ - u32 max_rx_fifo; + /** Timer ticks to wait in last ack for ack */ + u16 lastack_time; - /** Default MTU to be used when establishing connections */ - u16 default_mtu; + /** Timer ticks to wait in fin-wait2 for fin */ + u16 finwait2_time; - /** Initial CWND multiplier, which multiplies MSS to determine initial CWND. - * Set 0 to determine the initial CWND by another way */ - u16 initial_cwnd_multiplier; + /** Timer ticks to wait in closing for fin ack */ + u16 closing_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; /** Vectors of src addresses. Optional unless one needs > 63K active-opens */ - ip4_address_t *ip4_src_addresses; - u32 last_v4_address_rotor; - u32 last_v6_address_rotor; - ip6_address_t *ip6_src_addresses; + ip4_address_t *ip4_src_addrs; + ip6_address_t *ip6_src_addrs; - /** Enable tx pacing for new connections */ - u8 tx_pacing; + /** Fault-injection. Debug only */ + f64 buffer_fail_fraction; +} tcp_configuration_t; + +typedef struct _tcp_main +{ + /** per-worker context */ + tcp_worker_ctx_t *wrk_ctx; + + /* Pool of listeners. */ + tcp_connection_t *listener_pool; + + f64 tstamp_ticks_per_clock; + + /** 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]; + + clib_spinlock_t half_open_lock; + /** Pool of half-open connections on which we've sent a SYN */ + tcp_connection_t *half_open_connections; + + /** 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; - /** fault-injection */ - f64 buffer_fail_fraction; + /** Rotor for v4 source addresses */ + u32 last_v4_addr_rotor; - /** Default congestion control algorithm type */ - tcp_cc_algorithm_type_e cc_algo; + /** 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; @@ -577,6 +270,10 @@ 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 () { @@ -586,17 +283,10 @@ vnet_get_tcp_main () 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) \ { \ @@ -606,347 +296,36 @@ tcp_buffer_hdr (vlib_buffer_t * b) #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_DBG (TCP_EVT_STATE_CHANGE, 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_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); -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_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_init_mss (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_main.initial_cwnd_multiplier > 0) - return tcp_main.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); @@ -955,239 +334,29 @@ void tcp_connection_init_vars (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); -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); -} - -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, - TCP_TIMER_PERSIST_MIN)); -} - -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, - TCP_TIMER_PERSIST_MIN)); -} - -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_ */ /*