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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | ERRORS | HISTORY | SEE ALSO | COLOPHON |
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IP_MULTICAST_ALL(2const) IP_MULTICAST_ALL(2const)
IP_MULTICAST_ALL - delivery policy of multicast messages
Standard C library (libc, -lc)
#include <netinet/in.h> /* Definition of IP* constants */
#include <sys/socket.h>
int setsockopt(int sockfd, IPPROTO_IP, IP_MULTICAST_ALL,
const int *val, sizeof(int));
This option can be used to modify the delivery policy of multicast
messages.
If set to 1 (default), the socket will receive messages from all
the groups that have been joined globally on the whole system.
If set to 0, it will deliver messages only from the groups that
have been explicitly joined (for example via
IP_ADD_MEMBERSHIP(2const)) on this particular socket.
See IPPROTO_IP(2const). See setsockopt(2). See ip(7).
Linux 2.6.31.
IPPROTO_IP(2const), setsockopt(2), ip(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
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⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
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Linux man-pages 6.18 2025-11-25 IP_MULTICAST_ALL(2const)
Pages that refer to this page: IPPROTO_IP(2const)
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HTML rendering created 2026-05-24 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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