---
name: "sysdecode_socket_protocol"
section: "3"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd"]
url: "https://new.carta.tech/sysdecode_socket_protocol"
---

# sysdecode\_socket\_protocol(3)

lookup name of socket protocol

## NAME

**sysdecode\_socket\_protocol** – lookup name of socket protocol

## LIBRARY

library “libsysdecode”

## SYNOPSIS

**#include \<sysdecode.h\>**

*const* *char* *\**\

**sysdecode\_socket\_protocol**(*int domain*, *int protocol*);

## DESCRIPTION

The **sysdecode\_socket\_protocol**() function returns a text description of the protocol passed in the *protocol* argument to [socket(2)](/socket/2.md). **sysdecode\_socket\_protocol**() takes the *protocol* as well as the *domain* to uniquely identify the protocol.