fuchsia.net.tcp

TCP types used across multiple FIDL endpoints.

Added: NEXT

ENUMS

CongestionControlState strict

Type: uint32

Defined in fuchsia.net.tcp/tcp.fidl

TCP congestion control state machine state.

NameValueDescription
0

No indication of duplicate ACKs or loss. Everything is fine.
1

Received SACK blocks duplicate ACKs, assumed to be due to packet loss or reordering.
2

Sending rate reduced due to congestion signal. This is either an ECN or local queue overrun.
3

Sender has entered either fast recovery (after seeing enough duplicate ACKs) or SACK-based recovery
4

Sender hit RTO and entered slow start. Exits when all retransmitted packets have been ACKed.

State strict

Type: uint32

Defined in fuchsia.net.tcp/tcp.fidl

TCP state machine state.

NameValueDescription
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TABLES

Info

Defined in fuchsia.net.tcp/tcp.fidl

TCP protocol state.

OrdinalFieldTypeDescription
state State

The current state of the TCP state machine.
ca_state CongestionControlState

The current state of the TCP congention avoidance state machine.
rto_usec uint32

The current RTO value in microseconds.
tcpi_last_data_sent_msec uint32

Time since data was last sent on the connection in milliseconds.
tcpi_last_ack_recv_msec uint32

Time since the most recent ACK was received in milliseconds.
rtt_usec uint32

The estimated smoothed roundtrip time in microseconds.
rtt_var_usec uint32

The smoothed mean deviation of the roundtrip time in microseconds.
snd_ssthresh uint32

The sending slow start threshold in segments.
snd_cwnd uint32

The current sending congestion window in segments.
tcpi_total_retrans uint32

The total number of retransmission events.
tcpi_segs_out uint64

The total number of segments transmitted.
tcpi_segs_in uint64

The total number of segments received.
reorder_seen bool

Whether the connection thinks it has ever seen reordering.