Merge branch 'develop', version 0.9.5

Author: cyfdecyf

.travis.yml

@@ -1,6 +1,6 @@
 language: go
 go:
-  - 1.3
+  - 1.4.2
 env:
   - TRAVIS="yes"
 install:

CHANGELOG

@@ -1,3 +1,10 @@
+0.9.5 (2015-05-12)
+    * Support new encryption method "chacha20" and "salsa20"
+    * Avoid biased parent proxy selection for hash load balacing
+    * Fix AirDrop on OS X when using PAC
+    * Fix failed start with corrupted stat file
+    * Support changing the estimate timeout target
+
 0.9.4 (2014-10-08)
     * Bug fix (#179): close stat file after load
 

README.md

@@ -4,7 +4,7 @@ COW 是一个简化穿墙的 HTTP 代理服务器。它能自动检测被墙网
 
 [English README](README-en.md).
 
-当前版本：0.9.4 [CHANGELOG](CHANGELOG)
+当前版本：0.9.5 [CHANGELOG](CHANGELOG)
 [![Build Status](https://travis-ci.org/cyfdecyf/cow.png?branch=master)](https://travis-ci.org/cyfdecyf/cow)
 
 **欢迎在 develop branch 进行开发并发送 pull request :)**
@@ -37,6 +37,7 @@ COW 的设计目标是自动化，理想情况下用户无需关心哪些网站
     #开头的行是注释，会被忽略
     # 本地 HTTP 代理地址
     # 配置 HTTP 和 HTTPS 代理时请填入该地址
+    # 若配置代理时有对所有协议使用该代理的选项，且你不清楚此选项的含义，请勾选
     # 或者在自动代理配置中填入 http://127.0.0.1:7777/pac
     listen = http://127.0.0.1:7777
 
@@ -120,14 +121,14 @@ COW 默认配置下检测到被墙后，过两分钟再次尝试直连也是为
 - 不提供 cache
 - 不支持 HTTP pipeline（Chrome, Firefox 默认都没开启 pipeline，支持这个功能容易增加问题而好处并不明显）
 
-# 致谢
+# 致谢 (Acknowledgements)
 
 贡献代码：
 
 - @tevino: http parent proxy basic authentication
 - @xupefei: 提供 cow-hide.exe 以在 windows 上在后台执行 cow.exe
 - @sunteya: 改进启动和安装脚本
-- @fzerorubigd: identify blocked site by HTTP error code
+- @fzerorubigd: identify blocked site by HTTP error code and various bug fixes
 
 Bug reporter:
 

config.go

@@ -4,19 +4,21 @@ import (
 	"errors"
 	"flag"
 	"fmt"
-	"github.com/cyfdecyf/bufio"
 	"net"
 	"os"
 	"path"
 	"reflect"
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/cyfdecyf/bufio"
 )
 
 const (
-	version           = "0.9.4"
-	defaultListenAddr = "127.0.0.1:7777"
+	version               = "0.9.5"
+	defaultListenAddr     = "127.0.0.1:7777"
+	defaultEstimateTarget = "example.com"
 )
 
 type LoadBalanceMode byte
@@ -64,7 +66,8 @@ type Config struct {
 
 	// not configurable in config file
 	PrintVer        bool
-	EstimateTimeout bool // if run estimateTimeout()
+	EstimateTimeout bool   // Whether to run estimateTimeout().
+	EstimateTarget  string // Timeout estimate target site.
 
 	// not config option
 	saveReqLine bool // for http and cow parent, should save request line from client
@@ -103,6 +106,8 @@ func init() {
 	for _, port := range defaultTunnelAllowedPort {
 		config.TunnelAllowedPort[port] = true
 	}
+
+	config.EstimateTarget = defaultEstimateTarget
 }
 
 // Whether command line options specifies listen addr
@@ -560,6 +565,10 @@ func (p configParser) ParseDetectSSLErr(val string) {
 	config.DetectSSLErr = parseBool(val, "detectSSLErr")
 }
 
+func (p configParser) ParseEstimateTarget(val string) {
+	config.EstimateTarget = val
+}
+
 // overrideConfig should contain options from command line to override options
 // in config file.
 func parseConfig(rc string, override *Config) {

doc/sample-config/rc

@@ -10,6 +10,8 @@
 #   listen = http://127.0.0.1:7777
 #
 #   上面的例子中，cow 生成的 PAC url 为 http://127.0.0.1:7777/pac
+#   配置浏览器或系统 HTTP 和 HTTPS 代理时请填入该地址
+#   若配置代理时有对所有协议使用该代理的选项，且你不清楚此选项的含义，请勾选
 #
 # cow (需两个 cow 服务器配合使用):
 #   listen = cow://encrypt_method:password@1.2.3.4:5678
@@ -67,7 +69,8 @@ listen = http://127.0.0.1:7777
 #
 #   authinfo 中指定加密方法和密码，所有支持的加密方法如下：
 #     aes-128-cfb, aes-192-cfb, aes-256-cfb,
-#     bf-cfb, cast5-cfb, des-cfb, rc4-md5, rc4, table
+#     bf-cfb, cast5-cfb, des-cfb, rc4-md5,
+#     chacha20, salsa20, rc4, table
 #   推荐使用 aes-128-cfb
 #
 # cow:
@@ -124,6 +127,9 @@ listen = http://127.0.0.1:7777
 # 最多允许使用多少个 CPU 核
 #core = 2
 
+# 检测超时时间使用的网站，最好使用能快速访问的站点
+#estimateTarget = example.com
+
 # 允许建立隧道连接的端口，多个端口用逗号分隔，可重复多次
 # 默认总是允许下列服务的端口: ssh, http, https, rsync, imap, pop, jabber, cvs, git, svn
 # 如需允许其他端口，请用该选项添加

doc/sample-config/rc-en

@@ -79,7 +79,8 @@ listen = http://127.0.0.1:7777
 #   Here are the supported encryption methods:
 #
 #     aes-128-cfb, aes-192-cfb, aes-256-cfb,
-#     bf-cfb, cast5-cfb, des-cfb, rc4-md5, rc4, table
+#     bf-cfb, cast5-cfb, des-cfb, rc4-md5,
+#     chacha20, salsa20, rc4, table
 #
 #   aes-128-cfb is recommended.
 #
@@ -145,6 +146,9 @@ listen = http://127.0.0.1:7777
 # Maximum CPU core to use.
 #core = 2
 
+# cow uses this site to estimate timeout, better to use a fast website.
+#estimateTarget = example.com
+
 # Ports allowed to create tunnel (HTTP CONNECT method), comma separated list
 # or repeat to append more ports.
 # Ports for the following service are allowed by default:

estimate_timeout.go

@@ -17,11 +17,8 @@ const maxTimeout = 15 * time.Second
 var dialTimeout = defaultDialTimeout
 var readTimeout = defaultReadTimeout
 
-// use a fast to fetch web site
-const estimateSite = "www.baidu.com"
-
 var estimateReq = []byte("GET / HTTP/1.1\r\n" +
-	"Host: " + estimateSite + "\r\n" +
+	"Host: " + config.EstimateTarget + "\r\n" +
 	"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:11.0) Gecko/20100101 Firefox/11.0\r\n" +
 	"Accept: */*\r\n" +
 	"Accept-Language: en-us,en;q=0.5\r\n" +
@@ -32,16 +29,16 @@ var estimateReq = []byte("GET / HTTP/1.1\r\n" +
 // how much time is spent on connect and fetch. This avoids incorrectly
 // considering non-blocked sites as blocked when network connection is bad.
 func estimateTimeout() {
-	// debug.Println("estimating timeout")
+	//debug.Println("estimating timeout")
 	buf := connectBuf.Get()
 	defer connectBuf.Put(buf)
 	var est time.Duration
 
 	start := time.Now()
-	c, err := net.Dial("tcp", estimateSite+":80")
+	c, err := net.Dial("tcp", config.EstimateTarget+":80")
 	if err != nil {
 		errl.Printf("estimateTimeout: can't connect to %s: %v, network has problem?\n",
-			estimateSite, err)
+			config.EstimateTarget, err)
 		goto onErr
 	}
 	defer c.Close()
@@ -71,7 +68,7 @@ func estimateTimeout() {
 	}
 	if err != io.EOF {
 		errl.Printf("estimateTimeout: error getting %s: %v, network has problem?\n",
-			estimateSite, err)
+			config.EstimateTarget, err)
 		goto onErr
 	}
 	est = time.Now().Sub(start) * 10
@@ -97,7 +94,7 @@ func runEstimateTimeout() {
 	dialTimeout = config.DialTimeout
 	for {
 		estimateTimeout()
-		time.Sleep(30 * time.Second)
+		time.Sleep(time.Minute)
 	}
 }
 

http.go

@@ -710,7 +710,7 @@ func parseResponse(sv *serverConn, r *Request, rp *Response) (err error) {
 
 	//Check for http error code from config file
 	if config.HttpErrorCode > 0 && rp.Status == config.HttpErrorCode {
-		errl.Println("Requested http code is raised")
+		debug.Println("Requested http code is raised")
 		return CustomHttpErr
 	}
 

install-cow.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-version=0.9.4
+version=0.9.5
 
 arch=`uname -m`
 case $arch in
@@ -83,7 +83,7 @@ fi
 bin=cow-$os$arch-$version
 tmpdir=`mktemp -d /tmp/cow.XXXXXX`
 tmpbin=$tmpdir/cow
-binary_url="http://dl.chenyufei.info/cow/$bin.gz"
+binary_url="http://dl.chenyufei.info/cow/$version/$bin.gz"
 echo "Downloading cow binary $binary_url to $tmpbin.gz"
 curl -L "$binary_url" -o $tmpbin.gz || \
     exit_on_fail "Downloading cow binary failed"

main.go

@@ -16,8 +16,7 @@ func sigHandler() {
 	// TODO On Windows, these signals will not be triggered on closing cmd
 	// window. How to detect this?
 	sigChan := make(chan os.Signal, 1)
-	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM,
-		syscall.SIGHUP)
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
 
 	for sig := range sigChan {
 		// May handle other signals in the future.

pac.go

@@ -116,6 +116,9 @@ function host2Domain(host) {
 function FindProxyForURL(url, host) {
 	if (url.substring(0,4) == "ftp:")
 		return direct;
+	if (host.indexOf(".local", host.length - 6) !== -1) {
+		return direct;
+	}
 	var domain = host2Domain(host);
 	if (host.length == domain.length) {
 		return directAcc[host] ? direct : httpProxy;

pac.js

@@ -86,6 +86,9 @@ function host2Domain(host) {
 function FindProxyForURL(url, host) {
 	if (url.substring(0,4) == "ftp:")
 		return direct;
+	if (host.indexOf(".local", host.length - 6) !== -1) {
+		return direct;
+	}
 	var domain = host2Domain(host);
 	if (host.length == domain.length) {
 		return directAcc[host] ? direct : httpProxy;
@@ -160,7 +163,11 @@ testData = [
 	{ host: 'foo.baidu.com', mode: httpProxy},
 	{ host: 'google.com', mode: httpProxy},
 	{ host: 'www.google.com', mode: httpProxy},
-	{ host: 'www.google.com.hk', mode: httpProxy}
+	{ host: 'www.google.com.hk', mode: httpProxy},
+
+	// host in local domain should return direct
+	{ host: 'test.local', mode: direct},
+	{ host: '.local', mode: direct},
 ];
 
 for (i = 0; i < testData.length; i += 1) {

parent_proxy.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	ss "github.com/shadowsocks/shadowsocks-go/shadowsocks"
+	"hash/crc32"
 	"io"
 	"math/rand"
 	"net"
@@ -109,7 +110,7 @@ type hashParentPool struct {
 }
 
 func (pp *hashParentPool) connect(url *URL) (srvconn net.Conn, err error) {
-	start := int(stringHash(url.Host) % uint64(len(pp.parent)))
+	start := int(crc32.ChecksumIEEE([]byte(url.Host)) % uint32(len(pp.parent)))
 	debug.Printf("hash host %s try %d parent first", url.Host, start)
 	return connectInOrder(url, pp.parent, start)
 }

script/build.sh

@@ -48,7 +48,7 @@ build() {
 }
 
 build darwin amd64 mac64
-build darwin 386 mac32
+#build darwin 386 mac32
 build linux amd64 linux64
 build linux 386 linux32
 build linux arm linux-armv5tel

sitestat.go

@@ -4,13 +4,14 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"github.com/cyfdecyf/bufio"
 	"io/ioutil"
 	"math/rand"
 	"os"
 	"strings"
 	"sync"
 	"time"
+
+	"github.com/cyfdecyf/bufio"
 )
 
 func init() {
@@ -426,9 +427,18 @@ func (ss *SiteStat) GetDirectList() []string {
 var siteStat = newSiteStat()
 
 func initSiteStat() {
-	if err := siteStat.load(configPath.stat); err != nil {
-		os.Exit(1)
+	err := siteStat.load(configPath.stat)
+	if err != nil {
+		errl.Printf("loading stat file failed, reason : %s", err.Error())
+		// Simply try to load the stat.back
+		err = siteStat.load(configPath.stat + ".bak")
+		// After all its not critical , simply re-create a stat object if anything is not ok
+		if err != nil {
+			errl.Printf("loading stat backup failed, creating new one , reason: %s", err.Error())
+			siteStat = newSiteStat()
+		}
 	}
+
 	// Dump site stat while running, so we don't always need to close cow to
 	// get updated stat.
 	go func() {

util.go

@@ -453,15 +453,6 @@ func host2Domain(host string) (domain string) {
 	return host[dot2ndLast+1:]
 }
 
-// djb2 string hash function, from http://www.cse.yorku.ca/~oz/hash.html
-func stringHash(s string) (hash uint64) {
-	hash = 5381
-	for i := 0; i < len(s); i++ {
-		hash = ((hash << 5) + 1) + uint64(s[i])
-	}
-	return
-}
-
 // IgnoreUTF8BOM consumes UTF-8 encoded BOM character if present in the file.
 func IgnoreUTF8BOM(f *os.File) error {
 	bom := make([]byte, 3)