1 files changed, 129 insertions, 0 deletions
diff --git a/cmd/anygone/conf.go b/cmd/anygone/conf.go
new file mode 100644
index 0000000..5066808
--- /dev/null
+++ b/cmd/anygone/conf.go
@@ -0,0 +1,129 @@
+//
+// Copyright (c) 2017 anygone contributors (see AUTHORS file)
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// * Redistributions of source code must retain the above copyright notice, this
+//   list of conditions and the following disclaimer.
+//
+// * Redistributions in binary form must reproduce the above copyright notice,
+//   this list of conditions and the following disclaimer in the documentation
+//   and/or other materials provided with the distribution.
+//
+// * Neither the name of anygone nor the names of its
+//   contributors may be used to endorse or promote products derived from
+//   this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+package main
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/spf13/pflag"
+)
+
+type IPAddrCIDR struct {
+	Net   net.IPNet
+	Valid bool
+}
+
+func (ipnet IPAddrCIDR) String() string {
+	if ipnet.Valid {
+		return ipnet.Net.String()
+	}
+	return ""
+}
+
+func (ipnet *IPAddrCIDR) Set(value string) error {
+	ip, net, err := net.ParseCIDR(strings.TrimSpace(value))
+	if err != nil {
+		return err
+	}
+	net.IP = ip
+	*ipnet = IPAddrCIDR{*net, true}
+	return nil
+}
+
+func (*IPAddrCIDR) Type() string {
+	return "ipNet"
+}
+
+type Config struct {
+	name  string
+	flags *pflag.FlagSet
+
+	Help       bool
+	Version    bool
+	DeviceName string
+	DeviceType string
+	IFConfig   IPAddrCIDR
+	PostUp     string
+}
+
+func (cfg *Config) PrintUsage() {
+	cfg.flags.Usage()
+}
+
+func (cfg *Config) PrintVersion() {
+	fmt.Println("anygone version 0.1")
+}
+
+func (cfg *Config) Dump() {
+	fmt.Printf("Config: %+v\n", cfg)
+}
+
+func (cfg *Config) parsePost() error {
+	extraArgs := cfg.flags.Args()
+	if len(extraArgs) > 0 {
+		return fmt.Errorf("unknown additional parameters (%s)", strings.Join(extraArgs, ", "))
+	}
+
+	if cfg.DeviceName == "" && cfg.DeviceType == "" {
+		cfg.DeviceType = "tun"
+	}
+	return nil
+}
+
+func NewConfig() (cfg *Config, err error) {
+	cfg = &Config{}
+	cfg.name = filepath.Base(os.Args[0])
+	cfg.flags = pflag.NewFlagSet(cfg.name, pflag.ContinueOnError)
+	cfg.flags.SetInterspersed(false)
+	cfg.flags.SortFlags = false
+	cfg.flags.Usage = func() {
+		fmt.Fprintf(os.Stderr, "Usage of %s:\n", cfg.name)
+		cfg.flags.PrintDefaults()
+	}
+
+	cfg.flags.BoolVarP(&cfg.Help, "help", "h", false, "print this...")
+	cfg.flags.BoolVarP(&cfg.Version, "version", "v", false, "print version info and exit")
+
+	cfg.flags.StringVarP(&cfg.DeviceName, "dev", "d", "", "device name")
+	cfg.flags.StringVarP(&cfg.DeviceType, "type", "t", "", "device type")
+	cfg.flags.VarP(&cfg.IFConfig, "ifconfig", "n", "the local address for the tun/tap device and the used prefix length")
+	cfg.flags.StringVarP(&cfg.PostUp, "post-up-script", "x", "", "script gets called after interface is created")
+
+	if err = cfg.flags.Parse(os.Args[1:]); err != nil {
+		return
+	}
+	err = cfg.parsePost()
+	return
+}