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)