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package main
import (
"flag"
"fmt"
"github.com/tonistiigi/units"
"io"
"net"
"os"
)
const (
port = "60321"
network = "tcp"
usage = "Usage: hose <-handshake <rhost> | -r | -s <rhost>>"
)
var (
handshakeHost = flag.String("handshake", "", "exchange public keys with remote host")
recvFlag = flag.Bool("r", false, "receive")
sendHost = flag.String("s", "", "send to remote host")
)
func main() {
flag.Parse()
if *handshakeHost != "" {
if err := handshake(*handshakeHost); err != nil {
eprintf("%v\n", err)
}
} else if *recvFlag {
if err := recv(); err != nil {
eprintf("%v\n", err)
}
} else if *sendHost != "" {
if err := send(*sendHost); err != nil {
eprintf("%v\n", err)
}
} else {
logf("%s", usage)
flag.Usage()
os.Exit(1)
}
}
// recv pipes data from the remote host to stdout.
func recv() error {
laddr := net.JoinHostPort("", port)
ln, err := net.Listen(network, laddr)
if err != nil {
return err
}
defer ln.Close()
logf("listening on %s", laddr)
conn, err := ln.Accept()
if err != nil {
return err
}
defer conn.Close()
logf("accepted connection from %s", conn.RemoteAddr())
n, err := io.Copy(os.Stdout, conn)
logf("received %.2f", units.Bytes(n)*units.B)
return err
}
// send pipes data from stdin to the remote host.
func send(rhost string) error {
raddr := net.JoinHostPort(rhost, port)
logf("connecting to %s...", raddr)
conn, err := net.Dial(network, raddr)
if err != nil {
return err
}
defer conn.Close()
logf("connected to %s", raddr)
n, err := io.Copy(conn, os.Stdin)
logf("sent %.2f", units.Bytes(n)*units.B)
return err
}
func eprintf(format string, a ...any) {
logf(format, a...)
os.Exit(1)
}
func logf(format string, a ...any) {
msg := fmt.Sprintf(format, a...)
fmt.Fprintf(os.Stderr, "%s\n", msg)
}
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