---
name: "rte_flow_tcp_dir_param"
section: "3"
platform: "linux"
package: "dpdk-doc"
version: "24.11.4-0+deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/rte_flow_tcp_dir_param"
---

# rte\_flow\_tcp\_dir\_param(3)

## NAME

rte\_flow\_tcp\_dir\_param

## SYNOPSIS

`#include <rte_flow.h>`

### Data Fields

uint32\_t **scale**:4\
 uint32\_t **close\_initiated**:1\
 uint32\_t **last\_ack\_seen**:1\
 uint32\_t **data\_unacked**:1\
 uint32\_t **sent\_end**\
 uint32\_t **reply\_end**\
 uint32\_t **max\_win**\
 uint32\_t **max\_ack**\

## Detailed Description

**Warning**

**EXPERIMENTAL:** this structure may change without prior notice

Configuration parameters for each direction of a TCP connection. All fields should be in host byte order. If needed, driver should convert all fields to network byte order if HW needs them in that way.

Definition at line **3989** of file **rte\_flow.h**.

## Field Documentation

### uint32\_t scale

TCP window scaling factor, 0xF to disable.

Definition at line **3991** of file **rte\_flow.h**.

### uint32\_t close\_initiated

The FIN was sent by this direction.

Definition at line **3993** of file **rte\_flow.h**.

### uint32\_t last\_ack\_seen

An ACK packet has been received by this side.

Definition at line **3995** of file **rte\_flow.h**.

### uint32\_t data\_unacked

If set, it indicates that there is unacknowledged data for the packets sent from this direction.

Definition at line **4000** of file **rte\_flow.h**.

### uint32\_t sent\_end

Maximal value of sequence + payload length in sent packets (next ACK from the opposite direction).

Definition at line **4005** of file **rte\_flow.h**.

### uint32\_t reply\_end

Maximal value of (ACK + window size) in received packet + length over sent packet (maximal sequence could be sent).

Definition at line **4010** of file **rte\_flow.h**.

### uint32\_t max\_win

Maximal value of actual window size in sent packets.

Definition at line **4012** of file **rte\_flow.h**.

### uint32\_t max\_ack

Maximal value of ACK in sent packets.

Definition at line **4014** of file **rte\_flow.h**.

## Author

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