.\" Copyright, the authors of the Linux man-pages project
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.TH IP_DROP_SOURCE_MEMBERSHIP 2const 2025-11-25 "Linux man-pages 6.17"
.SH NAME
IP_DROP_SOURCE_MEMBERSHIP
\-
leave a source-specific multicast group
.SH LIBRARY
Standard C library
.RI ( libc ,\~ \-lc )
.SH SYNOPSIS
.nf
.BR "#include <netinet/in.h>" "  /* Definition of " IP* " constants */"
.B #include <sys/socket.h>
.P
.BI int\~setsockopt(int\~ sockfd ,\~IPPROTO_IP,\~IP_DROP_SOURCE_MEMBERSHIP,
.BI "               const\~struct\~ip_mreq_source\~*" val ,
.B "               sizeof(struct\~ip_mreq_source));"
.fi
.SH DESCRIPTION
Leave a source-specific group;
that is,
stop receiving data
from a given multicast group
that comes from a given source.
.P
If the application has subscribed to
multiple sources within the same group,
data from the remaining sources will still be delivered.
To stop receiving data from all sources at once,
use
.BR IP_DROP_MEMBERSHIP (2const).
.SH ERRORS
See
.BR IPPROTO_IP (2const).
See
.BR setsockopt (2).
See
.BR ip (7).
.SH HISTORY
Linux 2.4.22, Linux 2.5.68.
.SH SEE ALSO
.BR IPPROTO_IP (2const),
.BR ip_mreq_source (2type),
.BR setsockopt (2),
.BR ip (7)