mtg-i2p

I2P Service modification of the highly opinionated mtg Telegram proxy. Telegram . This repository contains mostly code which is copied from the original mtg source code, specifically, the internal/cli , internal/utils and internal/config directories. It uses the underlying mtglib that is available at https://github.com/9seconds/mtg . This approach was taken in order to retain the maxiumum number of features from mtg. If features are found to be irrelevant to I2P and also obstructive to our use cases, they may be removed as well. Otherwise, the modifications are intentionally minimal in order to make it easy to keep our distribution up-to-date.

This modifcation is created by changing the internet/config/type_hostport.go so that the config.toml file make include an I2P value. The modification is:

diff --git a/internal/config/type_hostport.go b/internal/config/type_hostport.go
index 937c637..8dcb254 100644
--- a/internal/config/type_hostport.go
+++ b/internal/config/type_hostport.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"net"
 	"strconv"
-	"strings"
 )
 
 type TypeHostPort struct {
@@ -14,12 +13,6 @@ type TypeHostPort struct {
 }
 
 func (t *TypeHostPort) Set(value string) error {
-	if strings.HasSuffix(value, ".i2p") {
-		t.Port = uint(0)
-		t.Host = value
-		t.Value = value
-		return nil
-	}
 	host, port, err := net.SplitHostPort(value)
 	if err != nil {
 		return fmt.Errorf("incorrect host:port value (%v): %w", value, err)

So you configure it by setting the “ bind-to ” value in config.toml to an I2P hostname, such as “telegram.i2p” like so:

bind-to = "telegram.i2p"

The second modification we do is to change internal/utils/net_listener.go file to produce an I2P listener when it encounters an I2P hostname. This is the required modification:

diff --git a/internal/utils/net_listener.go b/internal/utils/net_listener.go
index 9486940..496f51b 100644
--- a/internal/utils/net_listener.go
+++ b/internal/utils/net_listener.go
@@ -3,10 +3,8 @@ package utils
 import (
 	"fmt"
 	"net"
-	"strings"
 
 	"github.com/9seconds/mtg/v2/network"
-	sam "github.com/eyedeekay/sam3/helper"
 )
 
 type Listener struct {
@@ -29,15 +27,6 @@ func (l Listener) Accept() (net.Conn, error) {
 }
 
 func NewListener(bindTo string, bufferSize int) (net.Listener, error) {
-	if strings.HasSuffix(bindTo, ".i2p") {
-		base, err := sam.I2PListener(bindTo, "127.0.0.1:7656", bindTo)
-		if err != nil {
-			return nil, fmt.Errorf("cannot build a base I2P listener: %w", err)
-		}
-		return Listener{
-			Listener: base,
-		}, nil
-	}
 	base, err := net.Listen("tcp", bindTo)
 	if err != nil {
 		return nil, fmt.Errorf("cannot build a base listener: %w", err)

Otherwise, mtg is unchanged from it’s original stable, efficient self, effectively turning mtg into a stable, efficient proxy for Telegram clients to reach services with.

MIT License

Copyright (c) 2018 Sergey Arkhipov

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.