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authorFlorin Coras <fcoras@cisco.com>2019-09-27 08:16:40 -0700
committerDave Barach <openvpp@barachs.net>2019-10-10 20:32:43 +0000
commitbe237bf02382854118986e8ea84c7544e42023f2 (patch)
tree85ef98b86f1a8949a54602c15b5510c7cccfda20 /src/vnet/tcp/tcp.h
parent5b1379be3e25df096d97dcd217965169fc6bb1b2 (diff)
tcp: retry lost retransmits
Add heuristic that detects lost retransmitted segments and retries sending them. Type: feature Change-Id: I34d1bb16799e1993779222eb2bfad4b40704159e Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/tcp/tcp.h')
-rw-r--r--src/vnet/tcp/tcp.h9
1 files changed, 5 insertions, 4 deletions
diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h
index 1bf32818171..a31c46cdacf 100644
--- a/src/vnet/tcp/tcp.h
+++ b/src/vnet/tcp/tcp.h
@@ -168,7 +168,7 @@ typedef struct _sack_scoreboard
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 */
@@ -226,7 +226,7 @@ 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_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)
@@ -369,7 +369,9 @@ typedef struct _tcp_connection
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 */
@@ -957,8 +959,7 @@ tcp_is_lost_fin (tcp_connection_t * tc)
}
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);