diff options
Diffstat (limited to 'src/vnet/tcp/tcp.h')
| -rw-r--r-- | src/vnet/tcp/tcp.h | 963 |
1 files changed, 24 insertions, 939 deletions
diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h index 30c95a48ffa..708d7566eb2 100644 --- a/src/vnet/tcp/tcp.h +++ b/src/vnet/tcp/tcp.h @@ -18,464 +18,13 @@ #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> - -#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_RXT_MAX_BURST 10 - -#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; - -#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 */ - -/** Connection configuration flags */ -#define foreach_tcp_cfg_flag \ - _(RATE_SAMPLE, "Rate sampling") \ - _(NO_CSUM_OFFLOAD, "No csum offload") \ - _(NO_TSO, "TSO off") \ - _(TSO, "TSO") \ - _(NO_ENDPOINT,"No endpoint") \ - -typedef enum tcp_cfg_flag_bits_ -{ -#define _(sym, str) TCP_CFG_F_##sym##_BIT, - foreach_tcp_cfg_flag -#undef _ - TCP_CFG_N_FLAG_BITS -} tcp_cfg_flag_bits_e; - -typedef enum tcp_cfg_flag_ -{ -#define _(sym, str) TCP_CFG_F_##sym = 1 << TCP_CFG_F_##sym##_BIT, - foreach_tcp_cfg_flag -#undef _ - TCP_CFG_N_FLAGS -} tcp_cfg_flags_e; - -/** 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") \ - _(RXT_PENDING, "Retransmit pending") \ - _(FRXT_FIRST, "Retransmit first") \ - _(DEQ_PENDING, "Dequeue pending ") \ - _(PSH_PENDING, "PSH pending") \ - _(FINRCVD, "FIN received") \ - _(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 rxt_sacked; /**< Rxt bytes last delivered */ - 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_clear_reneging (sack_scoreboard_t * sb, u32 start, u32 end); -void scoreboard_init (sack_scoreboard_t * sb); -void scoreboard_init_rxt (sack_scoreboard_t * sb, u32 snd_una); -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, - TCP_BTS_IS_SACKED = 1 << 2, - TCP_BTS_IS_RXT_LOST = 1 << 3, -} __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 */ - u64 tx_in_flight; /**< In flight at tx time */ - u64 tx_lost; /**< Lost at tx time */ - 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_in_flight; /**< In flight at (re)transmit time */ - u64 tx_lost; /**< Lost over interval */ - u32 delivered; /**< Bytes delivered in interval_time */ - u32 acked_and_sacked; /**< Bytes acked + sacked now */ - u32 last_lost; /**< Bytes lost now */ - u32 lost; /**< Number of bytes lost over interval */ - 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 cfg_flags; /**< Connection configuration flags */ - 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 during current cc event */ - u32 snd_rxt_ts; /**< Timestamp when first packet is retransmitted */ - u32 prr_delivered; /**< RFC6937 bytes delivered during current event */ - u32 prr_start; /**< snd_una when prr starts */ - u32 rxt_delivered; /**< Rxt bytes delivered during current cc event */ - u32 rxt_head; /**< snd_una last time we re rxted the head */ - 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 */ - u64 lost; /**< Total bytes lost */ - 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 */ - u32 ipv6_flow_label; /**< flow label for ipv6 header */ - -#define rst_state snd_wl1 -} 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)) - -#define tcp_csum_offload(tc) (!((tc)->cfg_flags & TCP_CFG_F_NO_CSUM_OFFLOAD)) +#include <vnet/tcp/tcp_sack.h> +#include <vnet/tcp/tcp_bt.h> +#include <vnet/tcp/tcp_cc.h> typedef void (timer_expiration_handler) (tcp_connection_t * tc); @@ -484,17 +33,6 @@ 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; -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, @@ -752,14 +290,6 @@ 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) \ { \ @@ -769,84 +299,15 @@ 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) -{ - tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index); - if (PREDICT_FALSE (pool_is_free_index (wrk->connections, conn_index))) - return 0; - return pool_elt_at_index (wrk->connections, conn_index); -} - -always_inline tcp_connection_t * -tcp_connection_get_if_valid (u32 conn_index, u32 thread_index) -{ - tcp_worker_ctx_t *wrk; - if (thread_index >= vec_len (tcp_main.wrk_ctx)) - return 0; - wrk = tcp_get_worker (thread_index); - if (pool_is_free_index (wrk->connections, conn_index)) - return 0; - return pool_elt_at_index (wrk->connections, 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); -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); -u8 *format_tcp_connection_id (u8 * s, va_list * args); - -always_inline tcp_connection_t * -tcp_listener_get (u32 tli) -{ - tcp_connection_t *tc = 0; - if (!pool_is_free_index (tcp_main.listener_pool, tli)) - tc = pool_elt_at_index (tcp_main.listener_pool, tli); - return tc; -} - -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); @@ -854,256 +315,17 @@ 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_send_ack (tcp_connection_t * tc); -void tcp_update_burst_snd_vars (tcp_connection_t * tc); -void tcp_update_rto (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_retransmit (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, u32 len); -/** - * 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); -u8 *format_tcp_bt (u8 * s, va_list * args); - -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 clib_min (tc->rcv_dupacks * tc->snd_mss, - tc->snd_nxt - tc->snd_una); -} - -/** - * 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 - tc->rxt_delivered; - - ASSERT (flight_size >= 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) -{ - /* Whatever we have in flight + the packet we're about to send */ - return tcp_flight_size (tc) + 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; -} - -static inline u8 -tcp_is_descheduled (tcp_connection_t * tc) -{ - return (transport_connection_is_descheduled (&tc->connection) ? 1 : 0); -} - -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_update_burst_snd_vars (tcp_connection_t * tc); u32 tcp_snd_space (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); @@ -1117,64 +339,22 @@ 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_congestion (tcp_connection_t * tc) -{ - tc->cc_algo->congestion (tc); -} - -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); +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); - f64 srtt = clib_min ((f64) tc->srtt * TCP_TICK, tc->mrtt_us); +clib_error_t *vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en); - /* TODO should constrain to interface's max throughput but - * we don't have link speeds for sw ifs ..*/ - return ((f64) tc->cwnd / srtt); -} +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; always_inline void tcp_timer_set (tcp_connection_t * tc, u8 timer_id, u32 interval) @@ -1287,101 +467,6 @@ tcp_timer_is_active (tcp_connection_t * tc, tcp_timers_e timer) 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); -/** - * Initialize connection by gleaning network and rcv params from buffer - * - * @param tc connection to initialize - * @param b buffer whose current data is pointing at ip - * @param is_ip4 flag set to 1 if using ip4 - */ -void tcp_init_w_buffer (tcp_connection_t * tc, vlib_buffer_t * b, u8 is_ip4); - -/** - * 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; - vnet_buffer (b)->l4_hdr_offset = (u8 *) th - b->data; - b->flags |= VNET_BUFFER_F_L4_HDR_OFFSET_VALID; - 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_ */ /* |