What is it?  netcast is a tool that allows one to transmit data from one source   in the network to multiple sources, at full network speed, using   multicastng. This is similar to broadcasting, only that multicasting may   also work over network larger than one LAN.   Simple multicast wouldn't do in many cases, when synchronisation is needed  and netcast does simply that - enables transmission that is synchronised  and does not require N times bandwith for N identical transfers.   This should be of great use in situations such as installation of   systems on multiple computers - you can just send a single disk image to  all clients, and with netcast you can send it to all of them at one time,   fast :)    Or at least, it will do all of that, when all the bugs are removed and  all the missing features properly implemented. Multicasting setup notes:  If the server does not 'want' to come up returning a message like  "setsockopt() failed, can't join multicast group", it might be  that a) your system does not support multicasting at all  b) you don't have multicast group routing set up, e.g. when you don't   have a network device that handles 0.0.0.0 (default) network.  To fix this, you should do something like:    route add -net 224.0.0.0/8 eth0   (or whatever device you would like to use).   You might as well use 'route add default eth0'.    To setup the multicasting in larger networks (>1 routers), refer to   appropriate manuals, eg. Multicasting-HOWTO, I haven't tried it really,   if you do, let me know how it works ;)Very short startup instructions:   server <client count> [port]  client <ip address> [port]  ./server 4 1234 < file_in  ./client 10.0.0.123 1234 > file1  ./client 10.0.0.123 1234 > file2  ./client 10.0.0.123 1234 > file3   ./client 10.0.0.123 1234 > file4     Server will await for <count> client connections, then transfers will start.  Data is read from / written to stdout. Hacking:   debug.h : #define level 6    When set to sth. high, produces lots of debugging messages. Nothing    will be printed when at 0.   mcast.h : #define MCAST_ADDR_BASE "224.0.0."    Network base address in which multicast addresses will be generated.   mdist.h : #define ROUND 1024    Number of packets sent before synchronization.            #define DEF_PORT 9876    Default data port  mdtcp.h : #define MAX_CLIENTS 128    Number of clients (tcp connections) per server process,     servers are dynamically created, so unlimited number of clients may    connect (in theory, at last)License:    Netcast is distributed under the terms of BSD license. Please  see the file LICENSE for details. Author:      Stanis砤w Pa秌o [p88h] <staszek@nutki.com>