socket_mcttl4(3) debian man page | unix.com

socket_mcttl4(3)					     Library Functions Manual						  socket_mcttl4(3)

NAME
       socket_mcttl4 - set multicast ttl

SYNTAX
       #include <socket.h>

       int socket_mcttl4(int s,char TTL);

DESCRIPTION
       socket_mcttl4  sets  the  TTL of outgoing multicast packets on the socket s.  Each router decrements the packet TTL by one and discards the
       packet if the TTL reaches zero.	Setting the TTL to 1, for example, will limit the packet propagation to the LAN.

       If something goes wrong, socket_mcttl4 returns -1, setting errno appropriately.

SEE ALSO
       socket_mcttl6(3), socket_mcjoin4(3), socket_mcleave4(3)

																  socket_mcttl4(3)