#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_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_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)
-/* 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_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_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_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") \
_(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") \
+ _(RXT_PENDING, "Retransmit pending") \
+ _(FRXT_FIRST, "Retransmit first") \
+ _(DEQ_PENDING, "Dequeue pending ") \
_(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
+typedef enum tcp_connection_flag_bits_
{
#define _(sym, str) TCP_CONN_##sym##_BIT,
foreach_tcp_connection_flag
TCP_CONN_N_FLAG_BITS
} tcp_connection_flag_bits_e;
-typedef enum _tcp_connection_flag
+typedef enum tcp_connection_flag_
{
#define _(sym, str) TCP_CONN_##sym = 1 << TCP_CONN_##sym##_BIT,
foreach_tcp_connection_flag
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 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;
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)
{
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_
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 */
+ f64 first_tx_time; /**< Connection first tx time at tx */
tcp_bts_flags_t flags; /**< Sample flag */
} tcp_bt_sample_t;
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 */
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 */
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_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 */
u64 delivered; /**< Total bytes delivered to peer */
u64 app_limited; /**< Delivered when app-limited detected */
f64 delivered_time; /**< Time last bytes were acked */
+ f64 first_tx_time; /**< Send time for recently delivered/sent */
tcp_byte_tracker_t *bt; /**< Tx byte tracker */
tcp_errors_t errors; /**< Soft connection errors */
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* */
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_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))
+
+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;
+
always_inline void
tcp_cong_recovery_off (tcp_connection_t * tc)
{
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_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;
+ /** worker time */
+ u32 time_now;
+
+ /* Max timers to be handled per dispatch loop */
+ u32 max_timers_per_loop;
+
+ /** tx frames for ip 4/6 lookup nodes */
+ vlib_frame_t *ip_lookup_tx_frames[2];
+
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 timer expirations */
+ u32 *pending_timers;
+
+ /** worker timer wheel */
+ tw_timer_wheel_16t_2w_512sl_t timer_wheel;
+
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline2);
+
+ tcp_wrk_stats_t stats;
} tcp_worker_ctx_t;
+#define tcp_worker_stats_inc(_ti,_stat,_val) \
+ tcp_main.wrk_ctx[_ti].stats._stat += _val
+
+#define tcp_workerp_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;
+
+ /** Timer ticks to wait before cleaning up the connection */
+ u16 cleanup_time;
/** Number of preallocated connections */
u32 preallocated_connections;
+
+ /** Number of preallocated half-open connections */
u32 preallocated_half_open_connections;
/** Vectors of src addresses. Optional unless one needs > 63K active-opens */
- ip4_address_t *ip4_src_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;
+
+ /** 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;
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_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_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)))
+ 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 (tcp_main.connections[thread_index], conn_index);
+ 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)
{
- if (tcp_main.connections[thread_index] == 0)
+ tcp_worker_ctx_t *wrk;
+ if (thread_index >= vec_len (tcp_main.wrk_ctx))
return 0;
- if (pool_is_free_index (tcp_main.connections[thread_index], conn_index))
+ wrk = tcp_get_worker (thread_index);
+ if (pool_is_free_index (wrk->connections, conn_index))
return 0;
- return pool_elt_at_index (tcp_main.connections[thread_index], conn_index);
+ return pool_elt_at_index (wrk->connections, conn_index);
}
always_inline tcp_connection_t *
tcp_connection_set_state (tcp_connection_t * tc, tcp_state_t state)
{
tc->state = state;
- TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc);
+ TCP_EVT (TCP_EVT_STATE_CHANGE, tc);
}
void tcp_connection_close (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);
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)
{
- return pool_elt_at_index (tcp_main.listener_pool, 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 *
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_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_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_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);
+void tcp_program_retransmit (tcp_connection_t * tc);
/*
* Rate estimation
*
* @param tc tcp connection
*/
-void tcp_bt_track_tx (tcp_connection_t * tc);
+void tcp_bt_track_tx (tcp_connection_t * tc, u32 len);
/**
* Track a tcp retransmission
*
* @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)
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;
+ return clib_min (tc->rcv_dupacks * tc->snd_mss,
+ tc->snd_nxt - tc->snd_una);
}
/**
int flight_size;
flight_size = (int) (tc->snd_nxt - tc->snd_una) - tcp_bytes_out (tc)
- + tc->snd_rxt_bytes;
+ + tc->snd_rxt_bytes - tc->rxt_delivered;
- 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;
- }
+ ASSERT (flight_size >= 0);
return flight_size;
}
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 (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;
always_inline u32
tcp_loss_wnd (const tcp_connection_t * tc)
{
- return tc->snd_mss;
+ /* Whatever we have in flight + the packet we're about to send */
+ return tcp_flight_size (tc) + tc->snd_mss;
}
always_inline u32
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)
+ if ((tc->flags & TCP_CONN_FINSNT) && (tc->snd_una_max - tc->snd_una == 1))
return 1;
return 0;
}
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);
fib_node_index_t tcp_lookup_rmt_in_fib (tcp_connection_t * tc);
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->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 ((f64) tc->cwnd / srtt);
+}
+
always_inline void
tcp_timer_set (tcp_connection_t * tc, u8 timer_id, u32 interval)
{
{
/* 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));
+ 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,
- TCP_TIMER_PERSIST_MIN));
+ u32 interval;
+
+ if (seq_leq (tc->snd_una, tc->snd_congestion + tc->burst_acked))
+ interval = 1;
+ else
+ interval = clib_max (tc->rto * TCP_TO_TIMER_TICK, 1);
+
+ tcp_timer_update (tc, TCP_TIMER_PERSIST, interval);
}
always_inline void
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;
}
Code Review / vpp.git / blobdiff