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package main
import (
"io"
"log"
"net"
proxyproto "github.com/pires/go-proxyproto"
)
func chkErr(err error) {
if err != nil {
log.Fatalf("Error: %s", err.Error())
}
}
func main() {
// Dial some proxy listener e.g. https://github.com/mailgun/proxyproto
target, err := net.ResolveTCPAddr("tcp", "127.0.0.1:9876")
chkErr(err)
conn, err := net.DialTCP("tcp", nil, target)
chkErr(err)
defer conn.Close()
// Create a proxyprotocol header or use HeaderProxyFromAddrs() if you
// have two conn's
header := &proxyproto.Header{
Version: 1,
Command: proxyproto.PROXY,
TransportProtocol: proxyproto.TCPv4,
SourceAddr: &net.TCPAddr{
IP: net.ParseIP("10.1.1.1"),
Port: 1000,
},
DestinationAddr: &net.TCPAddr{
IP: net.ParseIP("20.2.2.2"),
Port: 2000,
},
}
// After the connection was created write the proxy headers first
_, err = header.WriteTo(conn)
chkErr(err)
// Then your data... e.g.:
_, err = io.WriteString(conn, "HELO")
chkErr(err)
}
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