---
name: "socket_mcloop6"
section: "3"
platform: "linux"
package: "libowfat-dev"
version: "0.32-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/socket_mcloop6"
---

# socket\_mcloop6(3)

set multicast loopback

## NAME

socket\_mcloop6 - set multicast loopback

## SYNTAX

**#include \<libowfat/socket.h\>**

int **socket\_mcloop6**(int *s*,char *loop*);

## DESCRIPTION

socket\_mcloop6 activates multicast loopback for the socket *s* if *loop* is non-zero, and deactivates it otherwise.  If loopback is activated, packets sent on this socket will be received on the same host.

If something goes wrong, socket\_mcloop6 returns -1, setting errno appropriately.

## SEE ALSO

[socket\_mcloop4(3)](/socket_mcloop4/3.md), [socket\_mcjoin6(3)](/socket_mcjoin6/3.md), [socket\_mcleave6(3)](/socket_mcleave6/3.md)