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.\" Copyright, the authors of the Linux man-pages project
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.TH IP_UNBLOCK_SOURCE 2const (date) "Linux man-pages (unreleased)"
.SH NAME
IP_UNBLOCK_SOURCE
\-
unblock multicast source
.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_UNBLOCK_SOURCE,
.BI " const\~struct\~ip_mreq_source\~*" src ,
.B " sizeof(struct\~ip_mreq_source));"
.fi
.SH DESCRIPTION
Unblock previously blocked multicast source.
.P
Fails with
.B EADDRNOTAVAIL
when given source is not being blocked.
.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 setsockopt (2),
.BR ip (7)
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