gowhoson

gowhoson

gowhoson is a golang implementation of the "Whoson" protocol.

What is whoson ?

Whoson ("WHO iS ONline") is a proposed Internet protocol that allows Internet server programs know if a particular (dynamically allocated) IP address is currently allocated to a known (trusted) user and, optionally, the identity of the said user. The protocol could be used by an SMTP Message Transfer System in conjunction with anti-spam-relaying filters to implement a scheme similar to the one described here to allow roaming customers use their "home" SMTP server to submit email while connected from a "foreign" network.

Link

• "Whoson" Project page. http://whoson.sourceforge.net/.
• About the "Whoson" protocol. http://whoson.sourceforge.net/whoson.txt

Examples whoson package

Server 01

func main() {
        whoson.ListenAndServe("tcp", ":9876")
}

Server 02

func main() {
  addr := net.TCPAddr{
    Port: 9876,
    IP:   net.ParseIP("127.0.0.1"),
  }

  l, err := net.ListenTCP("tcp", &addr)
  if err != nil {
    log.Fatalf("%v", err)
  }
  whoson.ServeTCP(l)
}

Client

func main() {
        client, err := whoson.Dial("tcp", "127.0.0.1:9876")
        if err != nil {
                log.Fatalf("%v", err)
        }
        defer client.Quit()

        res, err := client.Login("192.168.0.1", "user01@example.org")
        if err != nil {
                log.Fatalf("%v", err)
        }
        fmt.Println(res.String())
}

Install

$ go get -u github.com/tai-ga/gowhoson/cmd/gowhoson

Usage

Server

> gowhoson server -h
NAME:
   gowhoson server - gowhoson server mode

USAGE:
   gowhoson server [command options] [arguments...]

OPTIONS:
   --tcp value       e.g. [ServerIP:Port|nostart] [$GOWHOSON_SERVER_TCP]
   --udp value       e.g. [ServerIP:Port|nostart] [$GOWHOSON_SERVER_UDP]
   --log value       e.g. [stdout|stderr|discard] or "/var/log/filename.log" [$GOWHOSON_SERVER_LOG]
   --loglevel value  e.g. [debug|info|warn|error|dpanic|panic|fatal] [$GOWHOSON_SERVER_LOGLEVEL]
   --serverid value  e.g. [1000] (default: 0) [$GOWHOSON_SERVER_SERVERID]
   --expvar          e.g. (default: false) [$GOWHOSON_SERVER_EXPVAR]

Client

> gowhoson client -h
NAME:
   gowhoson client - gowhoson client mode

USAGE:
   gowhoson client command [command options] [arguments...]

COMMANDS:
     login       whoson command "LOGIN"
     query       whoson command "QUERY"
     logout      whoson command "LOGOUT"
     editconfig  edit client configration file

OPTIONS:
   --help, -h  show help

Implemented commands

• LOGIN
• LOGOUT
• QUERY
• QUIT

Reference

• Original reference implementation of whoson.
• Many japanese gopher products.
• 🎉 Many Thanks! 🎉

Contribute

1. fork a repository: github.com/tai-ga/gowhoson to github.com/you/repo
2. get original code: go get github.com/tai-ga/gowhoson
3. work on original code
4. add remote to your repo: git remote add myfork https://github.com/you/repo.git
5. push your changes: git push myfork
6. create a new Pull Request

• see GitHub and Go: forking, pull requests, and go-getting

License

MIT

Author

Masahiro Ono (@tai-ga)