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|
etherecho
=========
Command `etherecho` broadcasts a message to all machines in the same network
segment, and listens for other messages from other `etherecho` servers.
`etherecho` only works on Linux and BSD, and requires root permission or
`CAP_NET_ADMIN` on Linux.
Usage
-----
```
$ etherecho -h
Usage of etherecho:
-i string
network interface to use to send and receive messages
-m string
message to be sent (default: system's hostname)
```
Example
-------
Start an instance of `etherecho` on two machines on the same network segment:
```
foo $ etherecho -i eth0
```
```
bar $ etherecho -i eth0
```
Both machines should begin seeing messages from each other at regular intervals:
```
foo $ etherecho -i eth0
2017/06/14 00:03:13 [aa:aa:aa:aa:aa:aa] bar
2017/06/14 00:03:14 [aa:aa:aa:aa:aa:aa] bar
2017/06/14 00:03:15 [aa:aa:aa:aa:aa:aa] bar
```
```
bar $ etherecho -i eth0
2017/06/14 00:03:13 [bb:bb:bb:bb:bb:bb] foo
2017/06/14 00:03:14 [bb:bb:bb:bb:bb:bb] foo
2017/06/14 00:03:15 [bb:bb:bb:bb:bb:bb] foo
```
Additional machines can be added, so long as they reside on the same network
segment.
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