TCP File Descriptor Control - TCP File Descriptor Control

TCP File Descriptor Control - TCP File Descriptor Control - UG1586

Onload User Guide (UG1586)

Document_ID

UG1586

Release_Date

2026-06-08

Revision

1.5 English

Onload supports the following options in socket() and accept() calls.

Table 1. Options for socket() and accept()
Option	Description
`SOCK_NONBLOCK`	Supported in `socket()` and `accept()`. Sets the `O_NONBLOCK` file status flag on the new open file descriptor saving extra calls to `fcntl(2)` to achieve the same result.
`SOCK_CLOEXEC`	Supported in `accept()`. Sets the close-on-exec (`FD_CLOEXEC`) flag on the new file descriptor.