mapipe

ma-pipe - multiaddr pipes

multiaddr powered pipes

This is a simple program, much like netcat or telnet, that sets up pipes between multiaddrs.

Table of Contents

• Install
• Usage
  • CLI Usage Text
  • Tee (--tee)
  • Traces (--trace)
  • Rate Limiting (--bandwidth)
• Maintainer
• Contribute
• License

Install

For now, use go get to install it:

go get -u github.com/multiformats/ma-pipe/ma-pipe
ma-pipe --version # should work

Please file an issue if there is a problem with the install.

Usage

ma-pipe sets up simple pipes based on multiaddrs. It has four modes:

• listen will listen on 2 given multiaddrs, accept 1 conn each, and pipe the connection together
• dial will dial to 2 given multiaddrs, and pipe the connection together
• fwd will listen on 1 multiaddr, accept 1 conn, then dial the other given multiaddr
• proxy will listen on 1 multiaddr, accept 1 conn, read a multiaddr from the conn, and dial it

Notes:

• ma-pipe supports "zero" listen multiaddrs (eg ma-pipe proxy /ip4/0.0.0.0/tcp/0)
• ma-pipe supports the /unix/stdio multiaddr (eg ma-pipe fwd /unix/stdio /ip4/127.0.0.1/tcp/1234)

CLI Usage Text

> ma-pipe --help
USAGE
	ma-pipe <mode> <multiaddrs>...

	ma-pipe listen <listen-multiaddr1> <listen-multiaddr2>
	ma-pipe dial <dial-multiaddr1> <dial-multiaddr2>
	ma-pipe fwd <listen-multiaddr> <dial-multiaddr>
	ma-pipe proxy <listen-multiaddr>

OPTIONS
	-h, --help               display this help message
	-v, --version            display the version of the program
	-t, --trace <dir>        save a trace of the connection to <dir>
	-e, --tee                tee the connection to stdio
	--bandwidth <bandwidth>  introduce a bandwidth cap (eg 1MB/s)

EXAMPLES
	# listen on two multiaddrs, accept 1 conn each, and pipe them
	ma-pipe listen /ip4/127.0.0.1/tcp/1234 /ip4/127.0.0.1/tcp/1234

	# dial to both multiaddrs, and pipe them
	ma-pipe dial /ip4/127.0.0.1/tcp/1234 /ip4/127.0.0.1/tcp/1234

	# listen on one multiaddr, accept 1 conn, dial to the other, and pipe them
	ma-pipe fwd /ip4/127.0.0.1/tcp/1234 /ip4/127.0.0.1/tcp/1234

	# listen on one multiaddr, accept 1 conn.
	# read the first line, parse a multiaddr, dial that multiaddr, and pipe them
	ma-pipe proxy /ip4/127.0.0.1/tcp/1234

	# ma-pipe supports "zero" listen multiaddrs
	ma-pipe proxy /ip4/0.0.0.0/tcp/0

	# ma-pipe supports the /unix/stdio multiaddr
	ma-pipe fwd /unix/stdio /ip4/127.0.0.1/tcp/1234

	# ma-pipe supports the --tee option to inspect conn in stdio
	ma-pipe --tee fwd /ip4/0.0.0.0/tcp/0 /ip4/127.0.0.1/tcp/1234

	# ma-pipe allows throttling connections with a bandwidth max
	ma-pipe --bandwidth 1MB/s listen /ip4/127.0.0.1/tcp/1234 /ip4/127.0.0.1/tcp/1234

Tee (--tee)

The -e, --tee option allows the user to inspect the connection in stdio, as it happens.

> ma-pipe --tee listen /ip4/127.0.0.1/tcp/64829 /ip4/127.0.0.1/tcp/64830
# listening on /ip4/127.0.0.1/tcp/64829
# listening on /ip4/127.0.0.1/tcp/64830
# accepted /ip4/127.0.0.1/tcp/64830 /ip4/127.0.0.1/tcp/64853
# accepted /ip4/127.0.0.1/tcp/64829 /ip4/127.0.0.1/tcp/64855
# piping /ip4/127.0.0.1/tcp/64853 to /ip4/127.0.0.1/tcp/64855
> Hello there
< Hi!
> How's it going?
< Well, and you?

Traces (--trace)

The -t, --trace option allows the user to specify a directory to capture a trace of the connection. Three files will be written:

• <trace-dir>/ma-pipe-trace-<date>-<pid>-a2b for one side of the (duplex) connection.
• <trace-dir>/ma-pipe-trace-<date>-<pid>-b2a for the other side of the (duplex) connection.
• <trace-dir>/ma-pipe-trace-<date>-<pid>-ctl for control messages.

> tree mytraces
mytraces
├── ma-pipe-trace-2016-09-12-03:35:31Z-14088-a2b
├── ma-pipe-trace-2016-09-12-03:35:31Z-14088-b2a
└── ma-pipe-trace-2016-09-12-03:35:31Z-14088-ctl

Rate Limiting (--bandwidth)

The --bandwidth option allows users to specify rate-limiting through a maximum bandwidth. The flag uses go-humanize to read formats like 1MB/s and 4Bps.

> time head -c 16777216 /dev/urandom | ./ma-pipe --bandwidth 1MB/s fwd /unix/stdio /ip4/127.0.0.1/tcp/5432
...
./ma-pipe --bandwidth 1MB/s fwd /unix/stdio /ip4/127.0.0.1/tcp/5432  0.09s user 0.39s system 2% cpu 16.056 total

> time head -c 16777216 /dev/urandom | ./ma-pipe --bandwidth 4MB/s fwd /unix/stdio /ip4/127.0.0.1/tcp/5432
...
./ma-pipe --bandwidth 4MB/s fwd /unix/stdio /ip4/127.0.0.1/tcp/5432  0.20s user 0.37s system 14% cpu 4.062 total

Maintainers

Captain: @jbenet.

Contribute

Contributions welcome. Please check out the issues.

Check out our contributing document for more information on how we work, and about contributing in general. Please be aware that all interactions related to multiformats are subject to the IPFS Code of Conduct.

Small note: If editing the README, please conform to the standard-readme specification.

License

MIT © 2016 Protocol Labs Inc.