MiniPlex: A minimal UDP multiplexer/hub/broker.
ProtoConv: Protocol adapter to convert between a stream and datagrams.
In combination, a simple way to bolt-on rudimentary multi-cast/multi-path or combine connections for existing applications
USAGE:
./MiniPlex {-H|-T|-P} -p <port> [-l <localaddr>] [-Z <rcv buf size>]
[-o <timeout>] [-r <trunkhost>] [-t <trunkport>] [-B
<branchhost>] ... [-b <branchport>] ... [-c <console log
level>] [-f <file log level>] [-F <log filename>] [-S <size
in kB>] [-N <number of files>] [-x <numthreads>] [-M] [-m
<milliseconds>] [--] [--version] [-h]
Where:
-H, --hub
(OR required) Hub/Star mode: Forward datagrams from/to all endpoints.
-- OR --
-T, --trunk
(OR required) Trunk mode: Forward frames from a 'trunk' to other
endpoints. Forward datagrams from other endpoints to the trunk.
-- OR --
-P, --prune
(OR required) Like Trunk mode, but limits flow to one (first in best
dressed) branch
-p <port>, --port <port>
(required) Local port to listen/receive on.
-l <localaddr>, --local <localaddr>
Local ip address. Defaults to 0.0.0.0 for all ipv4 interfaces.
-Z <rcv buf size>, --so_rcvbuf <rcv buf size>
Datagram socket receive buffer size.
-o <timeout>, --timeout <timeout>
Milliseconds to keep an idle endpoint cached
-r <trunkhost>, --trunk_ip <trunkhost>
Remote trunk ip address.
-t <trunkport>, --trunk_port <trunkport>
Remote trunk port.
-B <branchhost>, --branch_ip <branchhost> (accepted multiple times)
Remote endpoint addresses to permanently cache. Use -b to provide
respective ports in the same order.
-b <branchport>, --branch_port <branchport> (accepted multiple times)
Remote endpoint port to permanently cache. Use -B to provide
respective addresses in the same order.
-c <console log level>, --console_logging <console log level>
Console log level: off, critical, error, warn, info, debug, or trace.
Default off.
-f <file log level>, --file_logging <file log level>
File log level: off, critical, error, warn, info, debug, or trace.
Default error.
-F <log filename>, --log_file <log filename>
Log filename. Defaults to ./MiniPlex.log
-S <size in kB>, --log_size <size in kB>
Roll the log file at this many kB. Defaults to 5000
-N <number of files>, --log_num <number of files>
Keep this many log files when rolling the log. Defaults to 3
-x <numthreads>, --concurrency <numthreads>
A hint for the number of threads in thread pool. Defaults to detected
hardware concurrency.
-M, --benchmark
Run a loopback test for fixed duration (see -m) and exit.
-m <milliseconds>, --benchmark_duration <milliseconds>
Number of milliseconds to run the loopback benchmark test. Defaults to
10000.
--, --ignore_rest
Ignores the rest of the labeled arguments following this flag.
--version
Displays version information and exits.
-h, --help
Displays usage information and exits.
=================================================================================
./ProtoConv -l <local port> [-a <local addr>] -A <remote addr> -r
<remote port> [-B <rcv buf size>] [-Q <max write queue
size>] [-D <packet delimiter>] [-T <remote tcp host>] [-C
<tcp is client>] [-t <remote tcp port>] [-s <serial
devices>] ... [-b <serial bauds rates>] ... [-L <serial
flow ctl settings>] ... [-Z <serial char sizes>] ... [-i
<serial stop bits>] ... [-p <frame protocol>] [-c <console
log level>] [-f <file log level>] [-F <log filename>] [-S
<log file size in kB>] [-N <number of log files>] [-x
<numthreads>] [--] [--version] [-h]
Where:
-l <local port>, --localport <local port>
(required) Local port to listen/receive datagrams on.
-a <local addr>, --localaddr <local addr>
Local ip address for datagrams. Defaults to 0.0.0.0 for all ipv4
interfaces.
-A <remote addr>, --remoteaddr <remote addr>
(required) Remote ip address for datagrams.
-r <remote port>, --remoteport <remote port>
(required) Remote port for datagrams.
-B <rcv buf size>, --so_rcvbuf <rcv buf size>
Datagram socket receive buffer size.
-Q <max write queue size>, --write_queue_size <max write queue size>
Max number of messages to buffer in the stream writer queue before
dropping (older) data.
-D <packet delimiter>, --packet_delimiter <packet delimiter>
Use a packet delimiter (inserted in the stream with sequence and CRC)
instead of protocol framing.
-T <remote tcp host>, --tcphost <remote tcp host>
If converting TCP, this is the remote IP address for the connection.
-C <tcp is client>, --tcpisclient <tcp is client>
If converting TCP, this is defines if it's a client or server
connection.
-t <remote tcp port>, --tcpport <remote tcp port>
TCP port if converting TCP.
-s <serial devices>, --serialdevices <serial devices> (accepted
multiple times)
List of serial devices, if converting serial
-b <serial bauds rates>, --serialbauds <serial bauds rates> (accepted
multiple times)
List of serial board rates, if converting serial
-L <serial flow ctl settings>, --serialflowctl <serial flow ctl
settings> (accepted multiple times)
List of serial flow control settings, if converting serial
-Z <serial char sizes>, --serialcharsize <serial char sizes> (accepted
multiple times)
List of serial char sizes, if converting serial
-i <serial stop bits>, --serialstopbits <serial stop bits> (accepted
multiple times)
List of serial stop bits settings, if converting serial
-p <frame protocol>, --frameprotocol <frame protocol>
Parse stream frames based on this protocol
-c <console log level>, --console_logging <console log level>
Console log level: off, critical, error, warn, info, debug, or trace.
Default off.
-f <file log level>, --file_logging <file log level>
File log level: off, critical, error, warn, info, debug, or trace.
Default error.
-F <log filename>, --log_file <log filename>
Log filename. Defaults to ./ProtoConv.log
-S <log file size in kB>, --log_size <log file size in kB>
Roll the log file at this many kB. Defaults to 5000
-N <number of log files>, --log_num <number of log files>
Keep this many log files when rolling the log. Defaults to 3
-x <numthreads>, --concurrency <numthreads>
A hint for the number of threads in thread pool. Defaults to detected
hardware concurrency.
--, --ignore_rest
Ignores the rest of the labeled arguments following this flag.
--version
Displays version information and exits.
-h, --help
Displays usage information and exits.
You can download a pre-built binaries for various platforms from the github Releases section. Alternatively, simply build your own copy from source using the instructions below.
Suppose you have a network that doesn't support UDP multicast. Maybe it's disabled for security or performance, or maybe you like firewall policies to have strict point-to-point rules. But you would still like to stream UDP packets to multiple endpoints. This is where MiniPlex can help. MiniPlex can convert a single unicast stream into multiple streams. For example:
Run MiniPlex to listen on port 1234 in hub mode any incoming datagrams will be forwarded to all branches. We specify two fixed branches on the command line, because they will just passively recieve data:
./MiniPlex -H -p 1234 -B 192.168.1.5 -b 1234 -B 192.168.1.6 -b 1234
Use vlc to stream out some unicast UDP audio:
vlc sftp://192.168.1.2/Music/ --sout="#std{access=udp, mux=ts, dst=127.0.0.1:1234}"
On the branch hosts (192.168.1.5 and 192.168.1.6 in this example) run vlc to recieve the the audio that is being forwarded by MiniPlex:
vlc udp://@:1234
Assuming
- You've git cloned this repo into a directory called 'MiniPlex' (source directory),
- Created an adjacent build directory called MiniPlex-bin,
- Have the appropriate c++20 toolchain installed (earlier version might work, but aren't tested):
- g++ >= 9.4.0, or
- clang >= 10.0.0, or
- MSVC >= VS 2019 v16.11
cmake -S MiniPlex -B MiniPlex-bin
This will automatically clone and init the submodules repo dependencies for spdlog, tclap and asio and configure the default build system.
cmake --build MiniPlex-bin
You should have a MiniPlex executable in MiniPlex-bin. See the synopis above for how to use it.