#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") \
+
+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") \
_(HALF_OPEN_DONE, "Half-open completed") \
_(FINPNDG, "FIN pending") \
_(RXT_PENDING, "Retransmit pending") \
- _(FRXT_FIRST, "Fast-retransmit first again") \
- _(DEQ_PENDING, "Pending dequeue acked") \
+ _(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") \
- _(NO_CSUM_OFFLOAD, "No Checksum Offload") \
-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 rxt_sacked; /**< Rxt last delivered */
+ 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 */
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_high_rxt (sack_scoreboard_t * sb, u32 snd_una);
+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)
transport_connection_t connection; /**< Common transport data. First! */
u8 state; /**< TCP state as per tcp_state_t */
- u8 is_tso; /** is connection could use tso */
+ 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 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 prev_dsegs_out; /**< Number of dsegs after last ack */
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 */
#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))
+
always_inline void
tcp_cong_recovery_off (tcp_connection_t * tc)
{
/** Enable tx pacing for new connections */
u8 enable_tx_pacing;
+ /** Allow use of TSO whenever available */
+ u8 allow_tso;
+
/** Default congestion control algorithm type */
tcp_cc_algorithm_type_e cc_algo;
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_flush_frame_to_output (tcp_worker_ctx_t * wrk, u8 is_ip4);
}
u32 tcp_snd_space (tcp_connection_t * tc);
-//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);