go-ricochet/utils/networkresolver.go

53 lines
1.4 KiB
Go

package utils
import (
"errors"
"golang.org/x/net/proxy"
"net"
"strings"
)
// NetworkResolver allows a client to resolve various hostnames to connections
// The supported types are onions address are:
// * ricochet:jlq67qzo6s4yp3sp
// * jlq67qzo6s4yp3sp
// * 127.0.0.1:55555|jlq67qzo6s4yp3sp - Localhost Connection
type NetworkResolver struct {
}
// Resolve takes a hostname and returns a net.Conn to the derived endpoint
func (nr *NetworkResolver) Resolve(hostname string) (net.Conn, string, error) {
if strings.HasPrefix(hostname, "127.0.0.1") {
addrParts := strings.Split(hostname, "|")
tcpAddr, err := net.ResolveTCPAddr("tcp", addrParts[0])
if err != nil {
return nil, "", errors.New("Cannot Resolve Local TCP Address")
}
conn, err := net.DialTCP("tcp", nil, tcpAddr)
if err != nil {
return nil, "", errors.New("Cannot Dial Local TCP Address")
}
// return just the onion address, not the local override for the hostname
return conn, addrParts[1], nil
}
resolvedHostname := hostname
if strings.HasPrefix(hostname, "ricochet:") {
addrParts := strings.Split(hostname, ":")
resolvedHostname = addrParts[1]
}
torDialer, err := proxy.SOCKS5("tcp", "127.0.0.1:9050", nil, proxy.Direct)
if err != nil {
return nil, "", err
}
conn, err := torDialer.Dial("tcp", resolvedHostname+".onion:9878")
if err != nil {
return nil, "", errors.New("Cannot Dial Remote Ricochet Address")
}
return conn, resolvedHostname, nil
}