NAME¶

IP_MULTICAST_ALL - delivery policy of multicast messages

LIBRARY¶

Standard C library (libc, -lc)

SYNOPSIS¶

#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));

DESCRIPTION¶

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.

ERRORS¶

See IPPROTO_IP(2const). See setsockopt(2). See ip(7).

HISTORY¶

Linux 2.6.31.

SEE ALSO¶

IPPROTO_IP(2const), setsockopt(2), ip(7)