X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=common.go;h=f9c5d1a44e04d8435b7f2c7a2335d4f29a74cf78;hb=refs%2Fheads%2Fdevelop;hp=fbafd56ab680de6afc61eb50f41890e1ed1babfc;hpb=cae1bf7a68f5be04942cdb96f91e5eca44232f5c;p=govpn.git

diff --git a/common.go b/common.go
index fbafd56..f9c5d1a 100644
--- a/common.go
+++ b/common.go
@@ -1,11 +1,10 @@
 /*
 GoVPN -- simple secure free software virtual private network daemon
-Copyright (C) 2014-2015 Sergey Matveev <stargrave@stargrave.org>
+Copyright (C) 2014-2020 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
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+the Free Software Foundation, version 3 of the License.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -27,35 +26,43 @@ import (
 
 const (
 	TimeoutDefault = 60
+	EtherSize      = 14
+	MTUMax         = 9000 + EtherSize + 1
+	MTUDefault     = 1500 + EtherSize + 1
+
+	ENV_IFACE  = "GOVPN_IFACE"
+	ENV_REMOTE = "GOVPN_REMOTE"
 )
 
 var (
-	MTU     int
-	Version string
+	Version string = "UNKNOWN"
 )
 
 // Call external program/script.
 // You have to specify path to it and (inteface name as a rule) something
 // that will be the first argument when calling it. Function will return
 // it's output and possible error.
-func ScriptCall(path, ifaceName string) ([]byte, error) {
+func ScriptCall(path, ifaceName, remoteAddr string) ([]byte, error) {
 	if path == "" {
 		return nil, nil
 	}
 	if _, err := os.Stat(path); err != nil && os.IsNotExist(err) {
 		return nil, err
 	}
-	out, err := exec.Command(path, ifaceName).CombinedOutput()
+	cmd := exec.Command(path)
+	cmd.Env = append(cmd.Env, ENV_IFACE+"="+ifaceName)
+	cmd.Env = append(cmd.Env, ENV_REMOTE+"="+remoteAddr)
+	out, err := cmd.CombinedOutput()
 	if err != nil {
 		log.Println("Script error", path, err, string(out))
 	}
 	return out, err
 }
 
-// Zero each byte
-func sliceZero(data []byte) {
+// Zero each byte.
+func SliceZero(data []byte) {
 	for i := 0; i < len(data); i++ {
-		data[i] = '\x00'
+		data[i] = 0
 	}
 }