Configure MTU on per-user basis

[govpn.git] / src / govpn / cmd / govpn-server / tcp.go

diff --git a/src/govpn/cmd/govpn-server/tcp.go b/src/govpn/cmd/govpn-server/tcp.go
index 437b5005aa8ca11b085419e484bf218108941c3a..c0e7f16f784ff0bf1a80d819bd41465bce74dddd 100644 (file)
--- a/src/govpn/cmd/govpn-server/tcp.go
+++ b/src/govpn/cmd/govpn-server/tcp.go
@@ -1,6 +1,6 @@
 /*
 GoVPN -- simple secure free software virtual private network daemon
-Copyright (C) 2014-2015 Sergey Matveev <stargrave@stargrave.org>
+Copyright (C) 2014-2016 Sergey Matveev <stargrave@stargrave.org>
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -51,7 +51,7 @@ func startTCP() {
 
 func handleTCP(conn net.Conn) {
        addr := conn.RemoteAddr().String()
-       buf := make([]byte, govpn.MTU)
+       buf := make([]byte, govpn.EncLessEnlargeSize+2*govpn.MTUMax)
        var n int
        var err error
        var prev int
@@ -61,7 +61,7 @@ func handleTCP(conn net.Conn) {
        var tap *govpn.TAP
        var conf *govpn.PeerConf
        for {
-               if prev == govpn.MTU {
+               if prev == len(buf) {
                        break
                }
                conn.SetReadDeadline(time.Now().Add(time.Duration(govpn.TimeoutDefault) * time.Second))
@@ -117,11 +117,13 @@ func handleTCP(conn net.Conn) {
                } else {
                        ifaceName, err := callUp(peer.Id)
                        if err != nil {
+                               peer = nil
                                break
                        }
-                       tap, err = govpn.TAPListen(ifaceName)
+                       tap, err = govpn.TAPListen(ifaceName, peer.MTU)
                        if err != nil {
                                log.Println("Unable to create TAP:", err)
+                               peer = nil
                                break
                        }
                        ps = &PeerState{
@@ -155,7 +157,7 @@ func handleTCP(conn net.Conn) {
        prev = 0
        var i int
        for {
-               if prev == govpn.MTU {
+               if prev == len(buf) {
                        break
                }
                conn.SetReadDeadline(time.Now().Add(conf.Timeout))