---- Add initial multicast vifs; add ip_forward flag user: Tom Henderson <tomh at tomh.org> files: src/internet-stack/ipv4-l3-protocol.cc src/internet-stack/ipv4-l3-protocol.h src/node/ipv4.cc src/node/ipv4.h src/node/wscript url: http://code.nsnam.org/tomh/ns-3-ip/rev/83630241ed46