.TH socket_mcloop4 3
.SH NAME
socket_mcloop4 \- set multicast loopback
.SH SYNTAX
.B #include <libowfat/socket.h>

int \fBsocket_mcloop4\fP(int \fIs\fR,char \fIloop\fR);
.SH DESCRIPTION
socket_mcloop4 activates multicast loopback for the socket \fIs\fR if
\fIloop\fR 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_mcloop4 returns -1, setting errno
appropriately.
.SH "SEE ALSO"
socket_mcloop6(3), socket_mcjoin4(3), socket_mcleave4(3)