github.com/jlmucb/cloudproxy@v0.0.0-20170830161738-b5aa0b619bc4/go/apps/mixnet/mixnet_directory/mixnet_directory.go (about)

     1  // Copyright (c) 2016, Google Inc. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package main
    16  
    17  import (
    18  	"crypto/x509/pkix"
    19  	"flag"
    20  	"log"
    21  	"os"
    22  	"os/signal"
    23  	"syscall"
    24  	"time"
    25  
    26  	"github.com/jlmucb/cloudproxy/go/apps/mixnet"
    27  	"github.com/jlmucb/cloudproxy/go/tao"
    28  )
    29  
    30  var addr = flag.String("addr", "127.0.0.1:9000", "Address and port of this directory.")
    31  var network = flag.String("network", "tcp", "Network protocol.")
    32  var configPath = flag.String("config", "tao.config", "Path to domain configuration file.")
    33  var timeoutDuration = flag.String("timeout", "10s", "Timeout on TCP connections, e.g. \"10s\".")
    34  
    35  // x509 identity of the mixnet router.
    36  var x509Identity pkix.Name = pkix.Name{
    37  	Organization:       []string{"Google Inc."},
    38  	OrganizationalUnit: []string{"Cloud Security"},
    39  }
    40  
    41  func serveRouters(dir *mixnet.DirectoryContext) error {
    42  	for {
    43  		_, err := dir.Accept()
    44  		if err != nil {
    45  			log.Println(err)
    46  			return err
    47  		}
    48  	}
    49  }
    50  func main() {
    51  	flag.Parse()
    52  	timeout, err := time.ParseDuration(*timeoutDuration)
    53  	if err != nil {
    54  		log.Fatalf("router: failed to parse timeout duration: %s\n", err)
    55  	}
    56  
    57  	dir, err := mixnet.NewDirectoryContext(*configPath, *network, *addr,
    58  		timeout, &x509Identity, tao.Parent())
    59  	if err != nil {
    60  		log.Fatalf("failed to configure directory: %s\n", err)
    61  	}
    62  
    63  	sigs := make(chan os.Signal, 1)
    64  	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM, syscall.SIGKILL)
    65  	go func() {
    66  		sig := <-sigs
    67  		log.Printf("directory: closing on signal: %s\n", sig)
    68  		dir.Close()
    69  		signo := int(sig.(syscall.Signal))
    70  		os.Exit(0x80 + signo)
    71  	}()
    72  
    73  	if err := serveRouters(dir); err != nil {
    74  		log.Fatalf("directory: error while serving: %s\n", err)
    75  	}
    76  }