UDP Samplicator

This small program receives UDP datagrams on a given port, and resends those datagrams to a specified set of receivers. In addition, a sampling divisor N may be specified individually for each receiver, which will then only receive one in N of the received packets.

DOWNLOADING

This package is distributed under https://github.com/sleinen/samplicator/

INSTALLATION

See INSTALL.md.

AUTHORS

See the AUTHORS file.

USAGE

The usage convention for the program is

$ samplicate [<option>...] [<destination>...]

Where each <option> can be one of

-d <level>  to set the debugging level
-s <address>    to set interface address on which to listen
        for incoming packets (default any)
-p <port>   to set the UDP port on which to listen for
        incoming packets (default 2000)
-b <buflen> size of receive buffer (default 65536)
-c <configfile> specify a config file to read
-x <delay>  to specify a transmission delay after each packet,
        in units of microseconds
-S      maintain (spoof) source addresses
-n      don't compute UDP checksum (only relevant with -S)
-f      fork program into background
-m <pidfile>    write the process ID to a file
-4      IPv4 only
-6      IPv6 only
-h      to print a usage message and exit
-u <pdulen> size of max pdu on listened socket (default 65536)

and each <destination> should be specified as <addr>[/<port>[/<interval>[,ttl]]], where

<addr>      IP address of the receiver
<port>      port UDP number of the receiver (default 2000)
<freq>      number of received datagrams between successive
        copied datagrams for this receiver.
<ttl>       The TTL (IPv4) or hop-limit (IPv6) for
        outgoing datagrams.

Config file format:

a.b.c.d[/e.f.g.h]: receiver ...

where:

a.b.c.d     is the sender's IP address
e.f.g.h     is a mask to apply to the sender (default 255.255.255.255)
receiver    see above.

Receivers specified on the command line will get all packets, those specified in the config-file will get only packets with a matching source.