title: Change TTL from application on linux
body: <p>is there a way to set ttl from application? Using c++ rh, not using boost. In /etc/sysctl.conf file value net.ipv4.ip_default_ttl is not present, in /proc/sys/net/ipv4/ip_default_ttl written 64. I am sending traffic to multicast group and see TTL=1. Would like to increase it to 3. 
  Thanks.</p>