Merge ebe13101c0 into bc8bd8c2f8

Merge pull request #475 from gek64/unified
Fix compile errors on FreeBSD/pfSense/OPNsense
2025-09-20 22:24:27 +08:00 · 2023-09-21 15:06:21 -06:00 · 2023-09-21 16:35:45 -04:00 · 2023-07-27 21:10:28 +08:00 · 2023-07-22 17:31:10 -04:00 · 2023-07-22 17:30:56 -04:00
27 changed files with 8261 additions and 7958 deletions
--- a/.clang-format
+++ b/.clang-format
@@ -0,0 +1,4 @@
+SortIncludes: false
+BasedOnStyle: Google
+ColumnLimit: 0
+IndentWidth: 4
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -0,0 +1,35 @@
+#note: experimental
+#      currently only used for generating `compile_commands.json` for clangd.
+#      to build this project, it's suggested to use `makefile` instead
+
+cmake_minimum_required(VERSION 3.7)
+project(udp2raw)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+set(CMAKE_CXX_STANDARD 11)
+
+set(SOURCE_FILES
+        main.cpp 
+        lib/md5.cpp
+        lib/pbkdf2-sha1.cpp
+        lib/pbkdf2-sha256.cpp
+        encrypt.cpp
+        log.cpp
+        network.cpp
+        common.cpp
+        connection.cpp
+        misc.cpp
+        fd_manager.cpp
+        client.cpp
+        server.cpp
+        lib/aes_faster_c/aes.cpp
+        lib/aes_faster_c/wrapper.cpp
+        my_ev.cpp
+)
+set(CMAKE_CXX_FLAGS "-Wall -Wextra -Wno-unused-variable -Wno-unused-parameter -Wno-missing-field-initializers -O2 -g -fsanitize=address,undefined")
+
+add_executable(udp2raw ${SOURCE_FILES})
+target_link_libraries(udp2raw rt)
+target_link_libraries(udp2raw pthread)
+include_directories(SYSTEM "libev")
+include_directories(".")
--- a/ISSUE_TEMPLATE.md
+++ b/ISSUE_TEMPLATE.md
@@ -1,6 +1 @@
-For English speaking user：
-https://github.com/wangyu-/UDPspeeder/wiki/Issue-Guide
-
-中文用户请看：
-https://github.com/wangyu-/UDPspeeder/wiki/发Issue前请看
-(否则Issue可能被忽略，或被直接关掉)
+English Only.
--- a/README.md
+++ b/README.md
@@ -1,42 +1,44 @@
 # Udp2raw-tunnel


-A Tunnel which turns UDP Traffic into Encrypted FakeTCP/UDP/ICMP Traffic by using Raw Socket, helps you Bypass UDP FireWalls(or Unstable UDP Environment). It can defend Replay-Attack and supports Multiplexing. It also acts as a Connection Stabilizer.
-
-![image0](images/image0.PNG)
+A Tunnel which turns UDP Traffic into Encrypted FakeTCP/UDP/ICMP Traffic by using Raw Socket, helps you Bypass UDP FireWalls(or Unstable UDP Environment).

 When used alone,udp2raw tunnels only UDP traffic. Nevertheless,if you used udp2raw + any UDP-based VPN together,you can tunnel any traffic(include TCP/UDP/ICMP),currently OpenVPN/L2TP/ShadowVPN and [tinyfecVPN](https://github.com/wangyu-/tinyfecVPN) are confirmed to be supported.

-![image_vpn](images/udp2rawopenvpn.PNG)

-[简体中文](/doc/README.zh-cn.md)(内容更丰富)
+![image0](images/image0.PNG)
+
+or
+
+![image_vpn](images/udp2rawopenvpn.PNG)

 [udp2raw wiki](https://github.com/wangyu-/udp2raw-tunnel/wiki)

+[简体中文](/doc/README.zh-cn.md)
+
+
 # Support Platforms
-Linux host (including desktop Linux,Android phone/tablet,OpenWRT router,or Raspberry PI) with root access.
+Linux host (including desktop Linux,Android phone/tablet,OpenWRT router,or Raspberry PI) with root account or cap_net_raw capability.

 For Windows and MacOS users, use the udp2raw in [this repo](https://github.com/wangyu-/udp2raw-multiplatform).

-<del>For Windows and MacOS You can run udp2raw inside [this](https://github.com/wangyu-/udp2raw-tunnel/releases/download/20171108.0/lede-17.01.2-x86_virtual_machine_image.zip) 7.5mb virtual machine image(make sure network adapter runs at bridged mode).</del>
-
-
-
 # Features
 ### Send/Receive UDP Packets with ICMP/FakeTCP/UDP headers
 ICMP/FakeTCP headers help you bypass UDP blocking, UDP QOS or improper UDP NAT behavior on some ISPs. In ICMP header mode,udp2raw works like an ICMP tunnel.

-UDP headers are also supported. In UDP header mode, it behaves just like a normal UDP tunnel, and you can just make use of the other features (such as encryption, anti-replay, or connection stalization).
+UDP headers are also supported. In UDP header mode, it behaves just like a normal UDP tunnel, and you can just make use of the other features (such as encryption, anti-replay, or connection stabilization).

 ### Simulated TCP with Real-time/Out-of-Order Delivery
-In FakeTCP header mode,udp2raw simulates 3-way handshake while establishing a connection,simulates seq and ack_seq while data transferring. It also simulates following TCP options: `MSS`, `sackOk`, `TS`, `TS_ack`, `wscale`.Firewalls will regard FakeTCP as a TCP connection, but its essentially UDP: it supports real-time/out-of-order delivery(just as normal UDP does), no congestion control or re-transmission. So there wont be any TCP over TCP problem when using OpenVPN.
+In FakeTCP header mode,udp2raw simulates 3-way handshake while establishing a connection,simulates seq and ack_seq while data transferring. It also simulates a few TCP options such as: `MSS`, `sackOk`, `TS`, `TS_ack`, `wscale`. Firewalls will regard FakeTCP as a TCP connection, but its essentially UDP: it supports real-time/out-of-order delivery(just as normal UDP does), no congestion control or re-transmission. So there wont be any TCP over TCP problem when using OpenVPN.

 ### Encryption, Anti-Replay
 * Encrypt your traffic with AES-128-CBC.
 * Protect data integrity by HMAC-SHA1 (or weaker MD5/CRC32).
-* Defense replay attack with an anti-replay window, smiliar to IPSec and OpenVPN.
+* Defense replay attack with anti-replay window.

-### Failure Dectection & Stablization (Connection Recovery)
+[Notes on encryption](https://github.com/wangyu-/udp2raw-tunnel/wiki/Notes-on-encryption)
+
+### Failure Dectection & Stabilization (Connection Recovery)
 Conection failures are detected by heartbeats. If timed-out, client will automatically change port number and reconnect. If reconnection is successful, the previous connection will be recovered, and all existing UDP conversations will stay vaild.

 For example, if you use udp2raw + OpenVPN, OpenVPN won't lose connection after any reconnect, **even if network cable is re-plugged or WiFi access point is changed**.
@@ -81,7 +83,7 @@ Now,an encrypted raw tunnel has been established between client and server throu
 ### Note
 To run on Android, check [Android_Guide](/doc/android_guide.md)

-`-a` option automatically adds an iptables rule (or a few iptables rules) for you, udp2raw relys on this iptables rule to work stably. Be aware you dont forget `-a` (its a common mistake). If you dont want udp2raw to add iptables rule automatically, you can add it manually(take a look at `-g` option) and omit `-a`.
+`-a` option automatically adds an iptables rule (or a few iptables rules) for you, udp2raw relies on this iptables rule to work stably. Be aware you dont forget `-a` (its a common mistake). If you dont want udp2raw to add iptables rule automatically, you can add it manually(take a look at `-g` option) and omit `-a`.


 # Advanced Topic
@@ -218,63 +220,6 @@ raw_mode: faketcp  cipher_mode: aes128cbc  auth_mode: md5

 (reverse speed was simliar and not uploaded)

-# Application
-## Tunneling any traffic via raw traffic by using udp2raw +openvpn
-![image_vpn](images/udp2rawopenvpn.PNG)
-1. Bypasses UDP block/UDP QOS
-
-2. No TCP over TCP problem (TCP over TCP problem http://sites.inka.de/bigred/devel/tcp-tcp.html ,https://community.openvpn.net/openvpn/ticket/2 )
-
-3. OpenVpn over ICMP also becomes a choice
-
-4. Supports almost any UDP-based VPN
-
-More details at [openvpn+udp2raw_guide](https://github.com/wangyu-/udp2raw-tunnel/wiki/udp2raw-openvpn-config-guide)
-## Speed-up tcp connection via raw traffic by using udp2raw+kcptun
-kcptun is a tcp connection speed-up program,it speeds-up tcp connection by using kcp protocol on-top of udp.by using udp2raw,you can use kcptun while udp is QoSed or blocked.
-(kcptun, https://github.com/xtaci/kcptun)
-
-## Speed-up tcp connection via raw traffic by using udp2raw+finalspeed
-finalspeed is a tcp connection speed-up program similiar to kcptun,it speeds-up tcp connection by using kcp protocol on-top of udp or tcp.but its tcp mode doesnt support openvz,you can bypass this problem if you use udp2raw+finalspeed together,and icmp mode also becomes avaliable.
-
-# How to build
-read [build_guide](/doc/build_guide.md)
-
-# Other
-### Easier installation on ArchLinux
-```
-yaourt -S udp2raw-tunnel # or
-pacaur -S udp2raw-tunnel
-```
-
-# Related work
-### kcptun-raw
-udp2raw was inspired by kcptun-raw,which modified kcptun to support tcp mode.
-
-https://github.com/Chion82/kcptun-raw
-### relayRawSocket
-kcptun-raw was inspired by relayRawSocket. A simple  udp to raw tunnel,wrote in python
-
-https://github.com/linhua55/some_kcptun_tools/tree/master/relayRawSocket
-### kcpraw
-another project of kcptun with tcp mode
-
-https://github.com/ccsexyz/kcpraw
-
-### icmptunnel
-Transparently tunnel your IP traffic through ICMP echo and reply packets.
-
-https://github.com/DhavalKapil/icmptunnel
-
-### Tcp Minion
-Tcp Minion is a project which modifid the code of tcp stack in kernel,and implemented real-time out-order udp packet delivery through this modified tcp stack.I failed to find the implementation,but there are some papers avaliable:
-
-https://arxiv.org/abs/1103.0463
-
-http://korz.cs.yale.edu/2009/tng/papers/pfldnet10.pdf
-
-https://pdfs.semanticscholar.org/9e6f/e2306f4385b4eb5416d1fcab16e9361d6ba3.pdf
-
 # wiki

 Check wiki for more info:
--- a/client.cpp
+++ b/client.cpp
--- a/common.cpp
+++ b/common.cpp
--- a/common.h
+++ b/common.h
@@ -10,16 +10,16 @@
 #define __STDC_FORMAT_MACROS 1
 #include <inttypes.h>

-#include<stdio.h>
-#include<string.h>
-#include<stdlib.h>
-#include<getopt.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>

-#include<unistd.h>
-#include<errno.h>
+#include <unistd.h>
+#include <errno.h>
 #include <sys/stat.h>
-#include <stdlib.h> //for exit(0);
-#include <errno.h> //For errno - the error number
+#include <stdlib.h>  //for exit(0);
+#include <errno.h>   //For errno - the error number
 #include <fcntl.h>
 #include <sys/time.h>
 #include <time.h>
@@ -27,8 +27,12 @@
 #include <assert.h>
 #include <pthread.h>

-#if defined(UDP2RAW_MP)
+#ifndef USE_LIBNET
+#define NO_LIBNET
+#endif

+#if defined(UDP2RAW_MP)
+const int is_udp2raw_mp = 1;
 #if !defined(__CYGWIN__) && !defined(__MINGW32__)
 #include <pcap.h>
 #else
@@ -41,7 +45,8 @@
 #endif

 #else
-
+#define UDP2RAW_LINUX
+const int is_udp2raw_mp = 0;
 //#include <linux/if_ether.h>
 #include <linux/filter.h>
 #include <linux/if_packet.h>
@@ -53,7 +58,11 @@

 #endif

+#if !defined(NO_LIBEV_EMBED)
 #include <my_ev.h>
+#else
+#include "ev.h"
+#endif

 #if defined(__MINGW32__)
 #include <winsock2.h>
@@ -70,51 +79,47 @@ typedef int socklen_t;
 #include <netinet/in.h>
 #endif

-
-#include<unordered_map>
+#include <unordered_map>
 #include <fstream>
 #include <string>
 #include <vector>
 #include <map>
 #include <set>
 #include <list>
-using  namespace std;
+using namespace std;

-#if defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN || \
+#if defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN ||             \
    defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ || \
-    defined(__BIG_ENDIAN__) || \
-    defined(__ARMEB__) || \
-    defined(__THUMBEB__) || \
-    defined(__AARCH64EB__) || \
+    defined(__BIG_ENDIAN__) ||                                           \
+    defined(__ARMEB__) ||                                                \
+    defined(__THUMBEB__) ||                                              \
+    defined(__AARCH64EB__) ||                                            \
    defined(_MIBSEB) || defined(__MIBSEB) || defined(__MIBSEB__)
 #define UDP2RAW_BIG_ENDIAN 1
 #endif

-
-#if defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN || \
+#if defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN ||             \
    defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ || \
-    defined(__LITTLE_ENDIAN__) || \
-    defined(__ARMEL__) || \
-    defined(__THUMBEL__) || \
-    defined(__AARCH64EL__) || \
+    defined(__LITTLE_ENDIAN__) ||                                           \
+    defined(__ARMEL__) ||                                                   \
+    defined(__THUMBEL__) ||                                                 \
+    defined(__AARCH64EL__) ||                                               \
    defined(_MIPSEL) || defined(__MIPSEL) || defined(__MIPSEL__)
 #define UDP2RAW_LITTLE_ENDIAN 1
 #endif

-#if defined(UDP2RAW_BIG_ENDIAN) &&defined(UDP2RAW_LITTLE_ENDIAN)
+#if defined(UDP2RAW_BIG_ENDIAN) && defined(UDP2RAW_LITTLE_ENDIAN)
 #error "endian detection conflicts"
 #endif

-
 #if !defined(UDP2RAW_BIG_ENDIAN) && !defined(UDP2RAW_LITTLE_ENDIAN)
 #error "endian detection failed"
 #endif

-
 #if defined(__MINGW32__)
 int inet_pton(int af, const char *src, void *dst);
 const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);
-#define setsockopt(a,b,c,d,e) setsockopt(a,b,c,(const char *)(d),e)
+#define setsockopt(a, b, c, d, e) setsockopt(a, b, c, (const char *)(d), e)
 #endif

 char *get_sock_error();
@@ -122,21 +127,18 @@ int get_sock_errno();

 #if defined(__MINGW32__)
 typedef SOCKET my_fd_t;
-inline int sock_close(my_fd_t fd)
-{
-	return closesocket(fd);
+inline int sock_close(my_fd_t fd) {
+    return closesocket(fd);
 }
 #else
 typedef int my_fd_t;
-inline int sock_close(my_fd_t fd)
-{
-	return close(fd);
+inline int sock_close(my_fd_t fd) {
+    return close(fd);
 }

 #endif

-
-typedef unsigned long long u64_t;   //this works on most platform,avoid using the PRId64
+typedef unsigned long long u64_t;  // this works on most platform,avoid using the PRId64
 typedef long long i64_t;

 typedef unsigned int u32_t;
@@ -155,7 +157,7 @@ typedef u64_t anti_replay_seq_t;

 typedef u64_t my_time_t;

-const int max_addr_len=100;
+const int max_addr_len = 100;

 extern int force_socket_buf;

@@ -164,205 +166,224 @@ extern int g_fix_gro;
 /*
 struct ip_port_t
 {
-	u32_t ip;
-	int port;
-	void from_u64(u64_t u64);
-	u64_t to_u64();
-	char * to_s();
+        u32_t ip;
+        int port;
+        void from_u64(u64_t u64);
+        u64_t to_u64();
+        char * to_s();
 };*/

 typedef u64_t fd64_t;

-u32_t djb2(unsigned char *str,int len);
-u32_t sdbm(unsigned char *str,int len);
+u32_t djb2(unsigned char *str, int len);
+u32_t sdbm(unsigned char *str, int len);

-struct address_t  //TODO scope id
+struct address_t  // TODO scope id
 {
-	struct hash_function
-	{
-	    u32_t operator()(const address_t &key) const
-		{
-	    	return sdbm((unsigned char*)&key.inner,sizeof(key.inner));
-		}
-	};
+    struct hash_function {
+        u32_t operator()(const address_t &key) const {
+            return sdbm((unsigned char *)&key.inner, sizeof(key.inner));
+        }
+    };

-	union storage_t //sockaddr_storage is too huge, we dont use it.
-	{
-		sockaddr_in ipv4;
-		sockaddr_in6 ipv6;
-	};
-	storage_t inner;
-
-	address_t()
-	{
-		clear();
-	}
-	void clear()
-	{
-		memset(&inner,0,sizeof(inner));
-	}
-	int from_ip_port(u32_t  ip, int port)
-	{
-		clear();
-		inner.ipv4.sin_family=AF_INET;
-		inner.ipv4.sin_port=htons(port);
-		inner.ipv4.sin_addr.s_addr=ip;
-		return 0;
-	}
-
-	int from_ip_port_new(int type, void *  ip, int port)
-	{
-		clear();
-		if(type==AF_INET)
-		{
-			inner.ipv4.sin_family=AF_INET;
-			inner.ipv4.sin_port=htons(port);
-			inner.ipv4.sin_addr.s_addr=*((u32_t *)ip);
-		}
-		else if(type==AF_INET6)
-		{
-			inner.ipv6.sin6_family=AF_INET6;
-			inner.ipv6.sin6_port=htons(port);
-			inner.ipv6.sin6_addr=*((in6_addr*)ip);
-		}
-		return 0;
-	}
-
-	int from_str(char * str);
-
-	int from_str_ip_only(char * str);
-
-	int from_sockaddr(sockaddr *,socklen_t);
-
-	char* get_str();
-	void to_str(char *);
-
-	inline u32_t get_type()
-	{
-		u32_t ret=((sockaddr*)&inner)->sa_family;
-		assert(ret==AF_INET||ret==AF_INET6);
-		return ret;
-	}
-
-	inline u32_t get_len()
-	{
-		u32_t type=get_type();
-		switch(type)
-		{
-			case AF_INET:
-				return sizeof(sockaddr_in);
-			case AF_INET6:
-				return sizeof(sockaddr_in6);
-			default:
-				assert(0==1);
-		}
-		return -1;
-	}
-
-	inline u32_t get_port()
-	{
-		u32_t type=get_type();
-		switch(type)
-		{
-			case AF_INET:
-				return ntohs(inner.ipv4.sin_port);
-			case AF_INET6:
-				return ntohs(inner.ipv6.sin6_port);
-			default:
-				assert(0==1);
-		}
-		return -1;
-	}
-
-	inline void set_port(int port)
-	{
-		u32_t type=get_type();
-		switch(type)
-		{
-			case AF_INET:
-				inner.ipv4.sin_port=htons(port);
-				break;
-			case AF_INET6:
-				inner.ipv6.sin6_port=htons(port);
-				break;
-			default:
-				assert(0==1);
-		}
-		return ;
-	}
-
-    bool operator == (const address_t &b) const
+    union storage_t  // sockaddr_storage is too huge, we dont use it.
    {
-    	//return this->data==b.data;
-        return memcmp(&this->inner,&b.inner,sizeof(this->inner))==0;
+        sockaddr_in ipv4;
+        sockaddr_in6 ipv6;
+    };
+    storage_t inner;
+
+    address_t() {
+        clear();
+    }
+    void clear() {
+        memset(&inner, 0, sizeof(inner));
+    }
+    int from_ip_port(u32_t ip, int port) {
+        clear();
+        inner.ipv4.sin_family = AF_INET;
+        inner.ipv4.sin_port = htons(port);
+        inner.ipv4.sin_addr.s_addr = ip;
+        return 0;
+    }
+
+    int from_ip_port_new(int type, void *ip, int port) {
+        clear();
+        if (type == AF_INET) {
+            inner.ipv4.sin_family = AF_INET;
+            inner.ipv4.sin_port = htons(port);
+            inner.ipv4.sin_addr.s_addr = *((u32_t *)ip);
+        } else if (type == AF_INET6) {
+            inner.ipv6.sin6_family = AF_INET6;
+            inner.ipv6.sin6_port = htons(port);
+            inner.ipv6.sin6_addr = *((in6_addr *)ip);
+        }
+        return 0;
+    }
+
+    int from_str(char *str);
+
+    int from_str_ip_only(char *str);
+
+    int from_sockaddr(sockaddr *, socklen_t);
+
+    char *get_str();
+    void to_str(char *);
+
+    inline u32_t get_type() {
+        u32_t ret = ((sockaddr *)&inner)->sa_family;
+        assert(ret == AF_INET || ret == AF_INET6);
+        return ret;
+    }
+
+    inline u32_t get_len() {
+        u32_t type = get_type();
+        switch (type) {
+            case AF_INET:
+                return sizeof(sockaddr_in);
+            case AF_INET6:
+                return sizeof(sockaddr_in6);
+            default:
+                assert(0 == 1);
+        }
+        return -1;
+    }
+
+    inline u32_t get_port() {
+        u32_t type = get_type();
+        switch (type) {
+            case AF_INET:
+                return ntohs(inner.ipv4.sin_port);
+            case AF_INET6:
+                return ntohs(inner.ipv6.sin6_port);
+            default:
+                assert(0 == 1);
+        }
+        return -1;
+    }
+
+    inline void set_port(int port) {
+        u32_t type = get_type();
+        switch (type) {
+            case AF_INET:
+                inner.ipv4.sin_port = htons(port);
+                break;
+            case AF_INET6:
+                inner.ipv6.sin6_port = htons(port);
+                break;
+            default:
+                assert(0 == 1);
+        }
+        return;
+    }
+
+    bool operator==(const address_t &b) const {
+        // return this->data==b.data;
+        return memcmp(&this->inner, &b.inner, sizeof(this->inner)) == 0;
    }

    int new_connected_udp_fd();

-    char* get_ip();
+    char *get_ip();
 };

 namespace std {
 template <>
- struct hash<address_t>
- {
-   std::size_t operator()(const address_t& key) const
-   {
+struct hash<address_t> {
+    std::size_t operator()(const address_t &key) const {
+        // return address_t::hash_function(k);
+        return sdbm((unsigned char *)&key.inner, sizeof(key.inner));
+    }
+};
+}  // namespace std

-	 //return address_t::hash_function(k);
-	   return sdbm((unsigned char*)&key.inner,sizeof(key.inner));
-   }
- };
-}
-
-union my_ip_t //just a simple version of address_t,stores ip only
+union my_ip_t  // just a simple version of address_t,stores ip only
 {
-	u32_t v4;
-	in6_addr v6;
+    u32_t v4;
+    in6_addr v6;

-    bool equal (const my_ip_t &b) const;
+    bool equal(const my_ip_t &b) const;

-    //int from_str(char * str);
-    char * get_str1() const;
-    char * get_str2() const;
+    // int from_str(char * str);
+    char *get_str1() const;
+    char *get_str2() const;

    int from_address_t(address_t a);
-
 };

-struct not_copy_able_t
-{
-	not_copy_able_t()
-	{
-
-	}
-	not_copy_able_t(const not_copy_able_t &other)
-	{
-		assert(0==1);
-	}
-	const not_copy_able_t & operator=(const not_copy_able_t &other)
-	{
-		assert(0==1);
-		return other;
-	}
+struct not_copy_able_t {
+    not_copy_able_t() {
+    }
+    not_copy_able_t(const not_copy_able_t &other) {
+        assert(0 == 1);
+    }
+    const not_copy_able_t &operator=(const not_copy_able_t &other) {
+        assert(0 == 1);
+        return other;
+    }
 };

-const int huge_data_len=65535+100; //a packet with link level header might be larger than 65535
-const int huge_buf_len=huge_data_len+100;
+const int huge_data_len = 65535 + 100;  // a packet with link level header might be larger than 65535
+const int huge_buf_len = huge_data_len + 100;

-const int max_data_len=1800;
-const int buf_len=max_data_len+400;
+const int max_data_len = 1800;
+const int buf_len = max_data_len + 400;

-//const int max_address_len=512;
+// const int max_address_len=512;

+#ifdef UDP2RAW_MP
+const int queue_len = 200;
+
+struct queue_t {
+    char data[queue_len][huge_buf_len];
+    int data_len[queue_len];
+
+    int head = 0;
+    int tail = 0;
+    void clear() {
+        head = tail = 0;
+    }
+    int empty() {
+        if (head == tail)
+            return 1;
+        else
+            return 0;
+    }
+    int full() {
+        if ((tail + 1) % queue_len == head)
+            return 1;
+        else
+            return 0;
+    }
+    void peek_front(char *&p, int &len) {
+        assert(!empty());
+        p = data[head];
+        len = data_len[head];
+    }
+    void pop_front() {
+        assert(!empty());
+        head++;
+        head %= queue_len;
+    }
+    void push_back(char *p, int len) {
+        assert(!full());
+        memcpy(data[tail], p, len);
+        data_len[tail] = len;
+        tail++;
+        tail %= queue_len;
+    }
+};
+
+int init_ws();
+#endif
 u64_t get_current_time();
-u64_t pack_u64(u32_t a,u32_t b);
+u64_t pack_u64(u32_t a, u32_t b);

 u32_t get_u64_h(u64_t a);

 u32_t get_u64_l(u64_t a);

-char * my_ntoa(u32_t ip);
+char *my_ntoa(u32_t ip);

 void init_random_number_fd();
 u64_t get_true_random_number_64();
@@ -371,138 +392,131 @@ u32_t get_true_random_number_nz();
 u64_t ntoh64(u64_t a);
 u64_t hton64(u64_t a);

-void write_u16(char *,u16_t a);// network order
+void write_u16(char *, u16_t a);  // network order
 u16_t read_u16(char *);
-void write_u32(char *,u32_t a);// network order
+void write_u32(char *, u32_t a);  // network order
 u32_t read_u32(char *);
-void write_u64(char *,u64_t a);
+void write_u64(char *, u64_t a);
 u64_t read_u64(char *);

-bool larger_than_u16(uint16_t a,uint16_t b);
-bool larger_than_u32(u32_t a,u32_t b);
+bool larger_than_u16(uint16_t a, uint16_t b);
+bool larger_than_u32(u32_t a, u32_t b);
 void setnonblocking(int sock);
-int set_buf_size(int fd,int socket_buf_size);
+int set_buf_size(int fd, int socket_buf_size);

 void myexit(int a);

-unsigned short csum(const unsigned short *ptr,int nbytes);
-unsigned short csum_with_header(char* header,int hlen,const unsigned short *ptr,int nbytes);
+unsigned short csum(const unsigned short *ptr, int nbytes);
+unsigned short csum_with_header(char *header, int hlen, const unsigned short *ptr, int nbytes);

-int numbers_to_char(my_id_t id1,my_id_t id2,my_id_t id3,char * &data,int &len);
-int char_to_numbers(const char * data,int len,my_id_t &id1,my_id_t &id2,my_id_t &id3);
+int numbers_to_char(my_id_t id1, my_id_t id2, my_id_t id3, char *&data, int &len);
+int char_to_numbers(const char *data, int len, my_id_t &id1, my_id_t &id2, my_id_t &id3);

-const int show_none=0;
-const int show_command=0x1;
-const int show_log=0x2;
-const int show_all=show_command|show_log;
+const int show_none = 0;
+const int show_command = 0x1;
+const int show_log = 0x2;
+const int show_all = show_command | show_log;

-int run_command(string command,char * &output,int flag=show_all);
-//int run_command_no_log(string command,char * &output);
-int read_file(const char * file,string &output);
+int run_command(string command, char *&output, int flag = show_all);
+// int run_command_no_log(string command,char * &output);
+int read_file(const char *file, string &output);

-vector<string> string_to_vec(const char * s,const char * sp);
-vector< vector <string> > string_to_vec2(const char * s);
+vector<string> string_to_vec(const char *s, const char *sp);
+vector<vector<string> > string_to_vec2(const char *s);

-string trim(const string& str, char c);
+string trim(const string &str, char c);

-string trim_conf_line(const string& str);
+string trim_conf_line(const string &str);

-vector<string> parse_conf_line(const string& s);
+vector<string> parse_conf_line(const string &s);

-int hex_to_u32_with_endian(const string & a,u32_t &output);
-int hex_to_u32(const string & a,u32_t &output);
-//extern string iptables_pattern;
+int hex_to_u32_with_endian(const string &a, u32_t &output);
+int hex_to_u32(const string &a, u32_t &output);
+// extern string iptables_pattern;

-int create_fifo(char * file);
+int create_fifo(char *file);

-void print_binary_chars(const char * a,int len);
+void print_binary_chars(const char *a, int len);

 template <class key_t>
-struct lru_collector_t:not_copy_able_t
-{
-	//typedef void* key_t;
-//#define key_t void*
-	struct lru_pair_t
-	{
-		key_t key;
-		my_time_t ts;
-	};
+struct lru_collector_t : not_copy_able_t {
+    // typedef void* key_t;
+    //#define key_t void*
+    struct lru_pair_t {
+        key_t key;
+        my_time_t ts;
+    };

-	unordered_map<key_t,typename list<lru_pair_t>::iterator> mp;
+    unordered_map<key_t, typename list<lru_pair_t>::iterator> mp;

-	list<lru_pair_t> q;
-	int update(key_t key)
-	{
-		assert(mp.find(key)!=mp.end());
-		auto it=mp[key];
-		q.erase(it);
+    list<lru_pair_t> q;
+    int update(key_t key) {
+        assert(mp.find(key) != mp.end());
+        auto it = mp[key];
+        q.erase(it);

-		my_time_t value=get_current_time();
-		if(!q.empty())
-		{
-			assert(value >=q.front().ts);
-		}
-		lru_pair_t tmp; tmp.key=key; tmp.ts=value;
-		q.push_front( tmp);
-		mp[key]=q.begin();
+        my_time_t value = get_current_time();
+        if (!q.empty()) {
+            assert(value >= q.front().ts);
+        }
+        lru_pair_t tmp;
+        tmp.key = key;
+        tmp.ts = value;
+        q.push_front(tmp);
+        mp[key] = q.begin();

-		return 0;
-	}
-	int new_key(key_t key)
-	{
-		assert(mp.find(key)==mp.end());
+        return 0;
+    }
+    int new_key(key_t key) {
+        assert(mp.find(key) == mp.end());

-		my_time_t value=get_current_time();
-		if(!q.empty())
-		{
-			assert(value >=q.front().ts);
-		}
-		lru_pair_t tmp; tmp.key=key; tmp.ts=value;
-		q.push_front( tmp);
-		mp[key]=q.begin();
+        my_time_t value = get_current_time();
+        if (!q.empty()) {
+            assert(value >= q.front().ts);
+        }
+        lru_pair_t tmp;
+        tmp.key = key;
+        tmp.ts = value;
+        q.push_front(tmp);
+        mp[key] = q.begin();

-		return 0;
-	}
-	int size()
-	{
-		return q.size();
-	}
-	int empty()
-	{
-		return q.empty();
-	}
-	void clear()
-	{
-		mp.clear(); q.clear();
-	}
-	my_time_t ts_of(key_t key)
-	{
-		assert(mp.find(key)!=mp.end());
-		return mp[key]->ts;
-	}
+        return 0;
+    }
+    int size() {
+        return q.size();
+    }
+    int empty() {
+        return q.empty();
+    }
+    void clear() {
+        mp.clear();
+        q.clear();
+    }
+    my_time_t ts_of(key_t key) {
+        assert(mp.find(key) != mp.end());
+        return mp[key]->ts;
+    }

-	my_time_t peek_back(key_t &key)
-	{
-		assert(!q.empty());
-		auto it=q.end(); it--;
-		key=it->key;
-		return it->ts;
-	}
-	void erase(key_t key)
-	{
-		assert(mp.find(key)!=mp.end());
-		q.erase(mp[key]);
-		mp.erase(key);
-	}
-	/*
-	void erase_back()
-	{
-		assert(!q.empty());
-		auto it=q.end(); it--;
-		key_t key=it->key;
-		erase(key);
-	}*/
+    my_time_t peek_back(key_t &key) {
+        assert(!q.empty());
+        auto it = q.end();
+        it--;
+        key = it->key;
+        return it->ts;
+    }
+    void erase(key_t key) {
+        assert(mp.find(key) != mp.end());
+        q.erase(mp[key]);
+        mp.erase(key);
+    }
+    /*
+    void erase_back()
+    {
+            assert(!q.empty());
+            auto it=q.end(); it--;
+            key_t key=it->key;
+            erase(key);
+    }*/
 };

-
 #endif /* COMMON_H_ */
--- a/connection.cpp
+++ b/connection.cpp
--- a/connection.h
+++ b/connection.h
@@ -16,336 +16,298 @@ extern int disable_anti_replay;
 #include "network.h"
 #include "misc.h"

-const int disable_conv_clear=0;//a udp connection in the multiplexer is called conversation in this program,conv for short.
+const int disable_conv_clear = 0;  // a udp connection in the multiplexer is called conversation in this program,conv for short.

-struct anti_replay_t  //its for anti replay attack,similar to openvpn/ipsec 's anti replay window
+struct anti_replay_t  // its for anti replay attack,similar to openvpn/ipsec 's anti replay window
 {
-	u64_t max_packet_received;
-	char window[anti_replay_window_size];
-	anti_replay_seq_t anti_replay_seq;
-	anti_replay_seq_t get_new_seq_for_send();
-	anti_replay_t();
-	void re_init();
+    u64_t max_packet_received;
+    char window[anti_replay_window_size];
+    anti_replay_seq_t anti_replay_seq;
+    anti_replay_seq_t get_new_seq_for_send();
+    anti_replay_t();
+    void re_init();

-	int is_vaild(u64_t seq);
-};//anti_replay;
+    int is_vaild(u64_t seq);
+};  // anti_replay;

 void server_clear_function(u64_t u64);

 #include <type_traits>

-template  <class T>
+template <class T>
 struct conv_manager_t  // manage the udp connections
 {
-	//typedef hash_map map;
-	unordered_map<T,u32_t> data_to_conv;  //conv and u64 are both supposed to be uniq
-	unordered_map<u32_t,T> conv_to_data;
+    // typedef hash_map map;
+    unordered_map<T, u32_t> data_to_conv;  // conv and u64 are both supposed to be uniq
+    unordered_map<u32_t, T> conv_to_data;

-	lru_collector_t<u32_t> lru;
-	//unordered_map<u32_t,u64_t> conv_last_active_time;
+    lru_collector_t<u32_t> lru;
+    // unordered_map<u32_t,u64_t> conv_last_active_time;

-	//unordered_map<u32_t,u64_t>::iterator clear_it;
+    // unordered_map<u32_t,u64_t>::iterator clear_it;

-	void (*additional_clear_function)(T data) =0;
+    void (*additional_clear_function)(T data) = 0;

-	long long last_clear_time;
+    long long last_clear_time;

-	conv_manager_t()
-		{
-			//clear_it=conv_last_active_time.begin();
-			long long last_clear_time=0;
-			additional_clear_function=0;
-		}
-	~conv_manager_t()
-		{
-			clear();
-		}
-		int get_size()
-		{
-			return conv_to_data.size();
-		}
-		void reserve()
-		{
-			data_to_conv.reserve(10007);
-			conv_to_data.reserve(10007);
-			//conv_last_active_time.reserve(10007);
+    conv_manager_t() {
+        // clear_it=conv_last_active_time.begin();
+        long long last_clear_time = 0;
+        additional_clear_function = 0;
+    }
+    ~conv_manager_t() {
+        clear();
+    }
+    int get_size() {
+        return conv_to_data.size();
+    }
+    void reserve() {
+        data_to_conv.reserve(10007);
+        conv_to_data.reserve(10007);
+        // conv_last_active_time.reserve(10007);

-			lru.mp.reserve(10007);
-		}
-		void clear()
-		{
-			if(disable_conv_clear) return ;
+        lru.mp.reserve(10007);
+    }
+    void clear() {
+        if (disable_conv_clear) return;

-			if(additional_clear_function!=0)
-			{
-				for(auto it=conv_to_data.begin();it!=conv_to_data.end();it++)
-				{
-					//int fd=int((it->second<<32u)>>32u);
-					additional_clear_function(  it->second);
-				}
-			}
-			data_to_conv.clear();
-			conv_to_data.clear();
+        if (additional_clear_function != 0) {
+            for (auto it = conv_to_data.begin(); it != conv_to_data.end(); it++) {
+                // int fd=int((it->second<<32u)>>32u);
+                additional_clear_function(it->second);
+            }
+        }
+        data_to_conv.clear();
+        conv_to_data.clear();

-			lru.clear();
-			//conv_last_active_time.clear();
+        lru.clear();
+        // conv_last_active_time.clear();

-			//clear_it=conv_last_active_time.begin();
+        // clear_it=conv_last_active_time.begin();
+    }
+    u32_t get_new_conv() {
+        u32_t conv = get_true_random_number_nz();
+        while (conv_to_data.find(conv) != conv_to_data.end()) {
+            conv = get_true_random_number_nz();
+        }
+        return conv;
+    }
+    int is_conv_used(u32_t conv) {
+        return conv_to_data.find(conv) != conv_to_data.end();
+    }
+    int is_data_used(T data) {
+        return data_to_conv.find(data) != data_to_conv.end();
+    }
+    u32_t find_conv_by_data(T data) {
+        return data_to_conv[data];
+    }
+    T find_data_by_conv(u32_t conv) {
+        return conv_to_data[conv];
+    }
+    int update_active_time(u32_t conv) {
+        // return conv_last_active_time[conv]=get_current_time();
+        lru.update(conv);
+        return 0;
+    }
+    int insert_conv(u32_t conv, T data) {
+        data_to_conv[data] = conv;
+        conv_to_data[conv] = data;
+        // conv_last_active_time[conv]=get_current_time();
+        lru.new_key(conv);
+        return 0;
+    }
+    int erase_conv(u32_t conv) {
+        if (disable_conv_clear) return 0;
+        T data = conv_to_data[conv];
+        if (additional_clear_function != 0) {
+            additional_clear_function(data);
+        }
+        conv_to_data.erase(conv);
+        data_to_conv.erase(data);
+        // conv_last_active_time.erase(conv);
+        lru.erase(conv);
+        return 0;
+    }
+    int clear_inactive(char *info = 0) {
+        if (get_current_time() - last_clear_time > conv_clear_interval) {
+            last_clear_time = get_current_time();
+            return clear_inactive0(info);
+        }
+        return 0;
+    }
+    int clear_inactive0(char *info) {
+        if (disable_conv_clear) return 0;

-		}
-		u32_t get_new_conv()
-		{
-			u32_t conv=get_true_random_number_nz();
-			while(conv_to_data.find(conv)!=conv_to_data.end())
-			{
-				conv=get_true_random_number_nz();
-			}
-			return conv;
-		}
-		int is_conv_used(u32_t conv)
-		{
-			return conv_to_data.find(conv)!=conv_to_data.end();
-		}
-		int is_data_used(T data)
-		{
-			return data_to_conv.find(data)!=data_to_conv.end();
-		}
-		u32_t find_conv_by_data(T data)
-		{
-			return data_to_conv[data];
-		}
-		T find_data_by_conv(u32_t conv)
-		{
-			return conv_to_data[conv];
-		}
-		int update_active_time(u32_t conv)
-		{
-			//return conv_last_active_time[conv]=get_current_time();
-			lru.update(conv);
-			return 0;
-		}
-		int insert_conv(u32_t conv,T data)
-		{
-			data_to_conv[data]=conv;
-			conv_to_data[conv]=data;
-			//conv_last_active_time[conv]=get_current_time();
-			lru.new_key(conv);
-			return 0;
-		}
-		int erase_conv(u32_t conv)
-		{
-			if(disable_conv_clear) return 0;
-			T data=conv_to_data[conv];
-			if(additional_clear_function!=0)
-			{
-				additional_clear_function(data);
-			}
-			conv_to_data.erase(conv);
-			data_to_conv.erase(data);
-			//conv_last_active_time.erase(conv);
-			lru.erase(conv);
-			return 0;
-		}
-		int clear_inactive(char * info=0)
-		{
-			if(get_current_time()-last_clear_time>conv_clear_interval)
-			{
-				last_clear_time=get_current_time();
-				return clear_inactive0(info);
-			}
-			return 0;
-		}
-		int clear_inactive0(char * info)
-		{
-			if(disable_conv_clear) return 0;
+        unordered_map<u32_t, u64_t>::iterator it;
+        unordered_map<u32_t, u64_t>::iterator old_it;

+        // map<uint32_t,uint64_t>::iterator it;
+        int cnt = 0;
+        // it=clear_it;
+        int size = lru.size();
+        int num_to_clean = size / conv_clear_ratio + conv_clear_min;  // clear 1/10 each time,to avoid latency glitch

-			unordered_map<u32_t,u64_t>::iterator it;
-			unordered_map<u32_t,u64_t>::iterator old_it;
+        num_to_clean = min(num_to_clean, size);

-			//map<uint32_t,uint64_t>::iterator it;
-			int cnt=0;
-			//it=clear_it;
-			int size=lru.size();
-			int num_to_clean=size/conv_clear_ratio+conv_clear_min;   //clear 1/10 each time,to avoid latency glitch
+        my_time_t current_time = get_current_time();
+        for (;;) {
+            if (cnt >= num_to_clean) break;
+            if (lru.empty()) break;

-			num_to_clean=min(num_to_clean,size);
+            u32_t conv;
+            my_time_t ts = lru.peek_back(conv);

-			my_time_t current_time=get_current_time();
-			for(;;)
-			{
-				if(cnt>=num_to_clean) break;
-				if(lru.empty()) break;
+            if (current_time - ts < conv_timeout) break;

-				u32_t conv;
-				my_time_t ts=lru.peek_back(conv);
+            erase_conv(conv);
+            if (info == 0) {
+                mylog(log_info, "conv %x cleared\n", conv);
+            } else {
+                mylog(log_info, "[%s]conv %x cleared\n", info, conv);
+            }
+            cnt++;
+        }
+        return 0;
+    }

-				if(current_time- ts < conv_timeout) break;
+    /*
+conv_manager_t();
+~conv_manager_t();
+int get_size();
+void reserve();
+void clear();
+u32_t get_new_conv();
+int is_conv_used(u32_t conv);
+int is_u64_used(T u64);
+u32_t find_conv_by_u64(T u64);
+T find_u64_by_conv(u32_t conv);
+int update_active_time(u32_t conv);
+int insert_conv(u32_t conv,T u64);
+int erase_conv(u32_t conv);
+int clear_inactive(char * ip_port=0);
+int clear_inactive0(char * ip_port);*/
+};  // g_conv_manager;

-				erase_conv(conv);
-				if(info==0)
-				{
-					mylog(log_info,"conv %x cleared\n",conv);
-				}
-				else
-				{
-					mylog(log_info,"[%s]conv %x cleared\n",info,conv);
-				}
-				cnt++;
-			}
-			return 0;
-		}
-
-
-		/*
-	conv_manager_t();
-	~conv_manager_t();
-	int get_size();
-	void reserve();
-	void clear();
-	u32_t get_new_conv();
-	int is_conv_used(u32_t conv);
-	int is_u64_used(T u64);
-	u32_t find_conv_by_u64(T u64);
-	T find_u64_by_conv(u32_t conv);
-	int update_active_time(u32_t conv);
-	int insert_conv(u32_t conv,T u64);
-	int erase_conv(u32_t conv);
-	int clear_inactive(char * ip_port=0);
-	int clear_inactive0(char * ip_port);*/
-};//g_conv_manager;
-
-struct blob_t:not_copy_able_t //used in conn_info_t.
+struct blob_t : not_copy_able_t  // used in conn_info_t.
 {
-	union  tmp_union_t//conv_manager_t is here to avoid copying when a connection is recovered
-	{
-		conv_manager_t<address_t> c;
-		conv_manager_t<u64_t> s;
-		//avoid templates here and there, avoid pointer and type cast
-		tmp_union_t()
-		{
-			if(program_mode==client_mode)
-			{
-				new( &c ) conv_manager_t<address_t>();
-			}
-			else
-			{
-				assert(program_mode==server_mode);
-				new( &s ) conv_manager_t<u64_t>();
-			}
-		}
-		~tmp_union_t()
-		{
-			if(program_mode==client_mode)
-			{
-				c.~conv_manager_t<address_t>();
-			}
-			else
-			{
-				assert(program_mode==server_mode);
-				s.~conv_manager_t<u64_t>();
-			}
-		}
-	}conv_manager;
+    union tmp_union_t  // conv_manager_t is here to avoid copying when a connection is recovered
+    {
+        conv_manager_t<address_t> c;
+        conv_manager_t<u64_t> s;
+        // avoid templates here and there, avoid pointer and type cast
+        tmp_union_t() {
+            if (program_mode == client_mode) {
+                new (&c) conv_manager_t<address_t>();
+            } else {
+                assert(program_mode == server_mode);
+                new (&s) conv_manager_t<u64_t>();
+            }
+        }
+        ~tmp_union_t() {
+            if (program_mode == client_mode) {
+                c.~conv_manager_t<address_t>();
+            } else {
+                assert(program_mode == server_mode);
+                s.~conv_manager_t<u64_t>();
+            }
+        }
+    } conv_manager;

-	anti_replay_t anti_replay;//anti_replay_t is here bc its huge,its allocation is delayed.
+    anti_replay_t anti_replay;  // anti_replay_t is here bc its huge,its allocation is delayed.
 };
-struct conn_info_t     //stores info for a raw connection.for client ,there is only one connection,for server there can be thousand of connection since server can
-//handle multiple clients
+struct conn_info_t  // stores info for a raw connection.for client ,there is only one connection,for server there can be thousand of connection since server can
+// handle multiple clients
 {
-	current_state_t state;
+    current_state_t state;

-	raw_info_t raw_info;
-	u64_t last_state_time;
-	u64_t last_hb_sent_time;  //client re-use this for retry
-	u64_t last_hb_recv_time;
-	//long long last_resent_time;
+    raw_info_t raw_info;
+    u64_t last_state_time;
+    u64_t last_hb_sent_time;  // client re-use this for retry
+    u64_t last_hb_recv_time;
+    // long long last_resent_time;

-	my_id_t my_id;
-	my_id_t oppsite_id;
+    my_id_t my_id;
+    my_id_t oppsite_id;

+    fd64_t timer_fd64;
+    fd64_t udp_fd64;

-	fd64_t timer_fd64;
-	fd64_t udp_fd64;
+    my_id_t oppsite_const_id;

-	my_id_t oppsite_const_id;
+    blob_t *blob;

-	blob_t *blob;
+    uint8_t my_roller;
+    uint8_t oppsite_roller;
+    u64_t last_oppsite_roller_time;

-	uint8_t my_roller;
-	uint8_t oppsite_roller;
-	u64_t last_oppsite_roller_time;
+    //	ip_port_t ip_port;

-//	ip_port_t ip_port;
+    /*
+            const uint32_t &ip=raw_info.recv_info.src_ip;
+            const uint16_t &port=raw_info.recv_info.src_port;

-/*
-	const uint32_t &ip=raw_info.recv_info.src_ip;
-	const uint16_t &port=raw_info.recv_info.src_port;
+    */
+    void recover(const conn_info_t &conn_info);
+    void re_init();
+    conn_info_t();
+    void prepare();
+    conn_info_t(const conn_info_t &b);
+    conn_info_t &operator=(const conn_info_t &b);
+    ~conn_info_t();
+};  // g_conn_info;

-*/
-	 void recover(const conn_info_t &conn_info);
-	void re_init();
-	conn_info_t();
-	void prepare();
-	conn_info_t(const conn_info_t&b);
-	conn_info_t& operator=(const conn_info_t& b);
-	~conn_info_t();
-};//g_conn_info;
-
-struct conn_manager_t  //manager for connections. for client,we dont need conn_manager since there is only one connection.for server we use one conn_manager for all connections
+struct conn_manager_t  // manager for connections. for client,we dont need conn_manager since there is only one connection.for server we use one conn_manager for all connections
 {
+    u32_t ready_num;

- u32_t ready_num;
+    // unordered_map<int,conn_info_t *> udp_fd_mp;  //a bit dirty to used pointer,but can void unordered_map search
+    // unordered_map<int,conn_info_t *> timer_fd_mp;//we can use pointer here since unordered_map.rehash() uses shallow copy

- //unordered_map<int,conn_info_t *> udp_fd_mp;  //a bit dirty to used pointer,but can void unordered_map search
- //unordered_map<int,conn_info_t *> timer_fd_mp;//we can use pointer here since unordered_map.rehash() uses shallow copy
+    unordered_map<my_id_t, conn_info_t *> const_id_mp;

- unordered_map<my_id_t,conn_info_t *> const_id_mp;
+    unordered_map<address_t, conn_info_t *> mp;  // put it at end so that it de-consturcts first

- unordered_map<address_t,conn_info_t*> mp; //put it at end so that it de-consturcts first
+    // lru_collector_t<address_t> lru;

- //lru_collector_t<address_t> lru;
+    unordered_map<address_t, conn_info_t *>::iterator clear_it;

- unordered_map<address_t,conn_info_t*>::iterator clear_it;
+    long long last_clear_time;

- long long last_clear_time;
-
- conn_manager_t();
- int exist(address_t addr);
- /*
- int insert(uint32_t ip,uint16_t port)
- {
-	 uint64_t u64=0;
-	 u64=ip;
-	 u64<<=32u;
-	 u64|=port;
-	 mp[u64];
-	 return 0;
- }*/
- conn_info_t *& find_insert_p(address_t addr);  //be aware,the adress may change after rehash //not true?
- conn_info_t & find_insert(address_t addr) ; //be aware,the adress may change after rehash
-
- int erase(unordered_map<address_t,conn_info_t*>::iterator erase_it);
-int clear_inactive();
-int clear_inactive0();
+    conn_manager_t();
+    int exist(address_t addr);
+    /*
+    int insert(uint32_t ip,uint16_t port)
+    {
+            uint64_t u64=0;
+            u64=ip;
+            u64<<=32u;
+            u64|=port;
+            mp[u64];
+            return 0;
+    }*/
+    conn_info_t *&find_insert_p(address_t addr);  // be aware,the adress may change after rehash //not true?
+    conn_info_t &find_insert(address_t addr);     // be aware,the adress may change after rehash

+    int erase(unordered_map<address_t, conn_info_t *>::iterator erase_it);
+    int clear_inactive();
+    int clear_inactive0();
 };

 extern conn_manager_t conn_manager;

 void server_clear_function(u64_t u64);

-int send_bare(raw_info_t &raw_info,const char* data,int len);//send function with encryption but no anti replay,this is used when client and server verifys each other
-//you have to design the protocol carefully, so that you wont be affect by relay attack
-//int reserved_parse_bare(const char *input,int input_len,char* & data,int & len); // a sub function used in recv_bare
-int recv_bare(raw_info_t &raw_info,char* & data,int & len);//recv function with encryption but no anti replay,this is used when client and server verifys each other
-//you have to design the protocol carefully, so that you wont be affect by relay attack
-int send_handshake(raw_info_t &raw_info,my_id_t id1,my_id_t id2,my_id_t id3);// a warp for send_bare for sending handshake(this is not tcp handshake) easily
-int send_safer(conn_info_t &conn_info,char type,const char* data,int len);  //safer transfer function with anti-replay,when mutually verification is done.
-int send_data_safer(conn_info_t &conn_info,const char* data,int len,u32_t conv_num);//a wrap for  send_safer for transfer data.
-//int reserved_parse_safer(conn_info_t &conn_info,const char * input,int input_len,char &type,char* &data,int &len);//subfunction for recv_safer,allow overlap
+int send_bare(raw_info_t &raw_info, const char *data, int len);  // send function with encryption but no anti replay,this is used when client and server verifys each other
+// you have to design the protocol carefully, so that you wont be affect by relay attack
+// int reserved_parse_bare(const char *input,int input_len,char* & data,int & len); // a sub function used in recv_bare
+int recv_bare(raw_info_t &raw_info, char *&data, int &len);  // recv function with encryption but no anti replay,this is used when client and server verifys each other
+// you have to design the protocol carefully, so that you wont be affect by relay attack
+int send_handshake(raw_info_t &raw_info, my_id_t id1, my_id_t id2, my_id_t id3);         // a warp for send_bare for sending handshake(this is not tcp handshake) easily
+int send_safer(conn_info_t &conn_info, char type, const char *data, int len);            // safer transfer function with anti-replay,when mutually verification is done.
+int send_data_safer(conn_info_t &conn_info, const char *data, int len, u32_t conv_num);  // a wrap for  send_safer for transfer data.
+// int reserved_parse_safer(conn_info_t &conn_info,const char * input,int input_len,char &type,char* &data,int &len);//subfunction for recv_safer,allow overlap

-//int recv_safer(conn_info_t &conn_info,char &type,char* &data,int &len);///safer transfer function with anti-replay,when mutually verification is done.
+// int recv_safer(conn_info_t &conn_info,char &type,char* &data,int &len);///safer transfer function with anti-replay,when mutually verification is done.

-int recv_safer_multi(conn_info_t &conn_info,vector<char> &type_arr,vector<string> &data_arr);//new api for handle gro
-#endif /* CONNECTION_H_ */
+int recv_safer_multi(conn_info_t &conn_info, vector<char> &type_arr, vector<string> &data_arr);  // new api for handle gro
+#endif                                                                                           /* CONNECTION_H_ */
--- a/doc/README.zh-cn.md
+++ b/doc/README.zh-cn.md
@@ -1,108 +1,175 @@
-# Udp2raw-tunnel 
-![image2](/images/image0.PNG)
-udp2raw tunnel，通过raw socket给UDP包加上TCP或ICMP header，进而绕过UDP屏蔽或QoS，或在UDP不稳定的环境下提升稳定性。可以有效防止在使用kcptun或者finalspeed的情况下udp端口被运营商限速。
+# Udp2raw-tunnel

-支持心跳保活、自动重连，重连后会恢复上次连接，在底层掉线的情况下可以保持上层不掉线。同时有加密、防重放攻击、信道复用的功能。

-[English](/README.md)
+A Tunnel which turns UDP Traffic into Encrypted FakeTCP/UDP/ICMP Traffic by using Raw Socket, helps you Bypass UDP FireWalls(or Unstable UDP Environment).

-[udp2raw+kcptun step_by_step教程](kcptun_step_by_step.md)
+通过 Raw Socket 将 UDP 流量转换为加密的 假TCP/UDP/ICMP 流量的隧道，可帮助你绕过 UDP 防火墙/规避不稳定的 UDP 网络环境。

-[udp2raw+finalspeed step_by_step教程](finalspeed_step_by_step.md)
+When used alone,udp2raw tunnels only UDP traffic. Nevertheless,if you used udp2raw + any UDP-based VPN together,you can tunnel any traffic(include TCP/UDP/ICMP),currently OpenVPN/L2TP/ShadowVPN and [tinyfecVPN](https://github.com/wangyu-/tinyfecVPN) are confirmed to be supported.
+
+单独使用时，udp2raw隧道仅处理UDP流量。尽管如此，将基于 UDP 使用的 VPN 与 udp2raw 一起使用时，你可以代理任何流量（包括 TCP/UDP/ICMP），目前已确定支持的有 OpenVPN/L2TP/ShadowVPN 与 [tinyfecVPN](https://github.com/wangyu-/tinyfecVPN)
+
+![image0](images/image0.PNG)
+
+or
+
+![image_vpn](images/udp2rawopenvpn.PNG)

 [udp2raw wiki](https://github.com/wangyu-/udp2raw-tunnel/wiki)

-**提示：**
+[简体中文](/doc/README.zh-cn.md)

-udp2raw不是加速器，只是一个帮助你绕过UDP限制的工具。如果你需要UDP加速器，请看UDPspeeder。

-UDPspeeder的repo:
+# Support Platforms

-https://github.com/wangyu-/UDPspeeder
 # 支持的平台
-Linux主机，有root权限。可以是PC、android手机/平板、openwrt路由器、树莓派。主机上最好安装了iptables命令(apt/yum很容易安装)。

-Release中提供了`amd64`、`x86`、`arm`、`mips_be`、`mips_le`的预编译binary.
+Linux host (including desktop Linux,Android phone/tablet,OpenWRT router,or Raspberry PI) with root account or cap_net_raw capability.

-##### 对于windows和mac用户：
+有 root 权限的，或者 cap_net_raw 支持的 Linux 设备（包括桌面电脑， Android 手机/平板， OpenWRT 路由器和树莓派）。

-可以用[这个repo](https://github.com/wangyu-/udp2raw-multiplatform)里的udp2raw，原生运行。
+For Windows and MacOS users, use the udp2raw in [this repo](https://github.com/wangyu-/udp2raw-multiplatform).

-<del>可以把udp2raw运行在虚拟机上(网络必须是桥接模式)。可以参考： https://github.com/wangyu-/udp2raw-tunnel/wiki/在windows-mac上运行udp2raw客户端，带图形界面 </del>
+对于 Windows 和 macOS 用户，使用[这个 Repo](https://github.com/wangyu-/udp2raw-multiplatform) 当中的udp2raw。

-##### 对于ios和游戏主机用户：
+# Features

-可以把udp2raw运行在局域网的其他机器/虚拟机上。最好的办法是买个能刷OpenWrt/LEDE/梅林的路由器，把udp2raw运行在路由器上。
+# 功能

-# 功能特性
-### 把udp流量伪装成tcp /icmp
-用raw socket给udp包加上tcp/icmp包头，可以突破udp流量限制或Udp QOS。或者在udp nat有问题的环境下，提升稳定性。  另外也支持用raw 发udp包，这样流量不会被伪装，只会被加密。
+### Send/Receive UDP Packets with ICMP/FakeTCP/UDP headers

-### 模拟TCP3次握手
-模拟TCP3次握手，模拟seq ack过程。另外还模拟了一些tcp option：MSS,sackOk,TS,TS_ack,wscale，用来使流量看起来更像是由普通的linux tcp协议栈发送的。
+### 收发有 ICMP/假TCP/UDP 标头的 UDP 数据包。

-### 心跳保活、自动重连，连接恢复
-心跳保活、自动重连，udp2raw重连可以恢复上次的连接，重连后上层连接继续有效，底层掉线上层不掉线。有效解决上层连接断开的问题。 （功能借鉴自[kcptun-raw](https://github.com/Chion82/kcptun-raw)）（**就算你拔掉网线重插，或者重新拨号获得新ip，上层应用也不会断线**）
+ICMP/FakeTCP headers help you bypass UDP blocking, UDP QOS or improper UDP NAT behavior on some ISPs. In ICMP header mode,udp2raw works like an ICMP tunnel.

-### 加密 防重放攻击
-用aes128cbc加密(或更弱的xor)，hmac-sha1(或更弱的md5/crc32/simple)做数据完整校验。用类似ipsec/openvpn的replay window机制来防止重放攻击。
+ICMP/假TCP 标头帮助你绕过UDP封锁，UDP QoS 或者纠正由于部分 IPS 的 NAT 导致的 UDP 错误。。ICMP标头模式下， udp2raw 会像 ICMP 隧道一样工作。

-设计目标是，即使攻击者可以监听到tunnel的所有包，可以选择性丢弃tunnel的任意包，可以重放任意包；攻击者也没办法获得tunnel承载的任何数据，也没办法向tunnel的数据流中通过包构造/包重放插入任何数据。
+UDP headers are also supported. In UDP header mode, it behaves just like a normal UDP tunnel, and you can just make use of the other features (such as encryption, anti-replay, or connection stabilization).
+
+也支持UDP标头模式。在这个模式下，udp2raw 表现就像一个普通的 UDP 隧道，这时你可以使用其他udp2raw的功能，如加密，防重放，或者稳定性提升。
+
+### Simulated TCP with Real-time/Out-of-Order Delivery
+
+### 模拟实时/乱序 TCP 连接
+
+In FakeTCP header mode,udp2raw simulates 3-way handshake while establishing a connection,simulates seq and ack_seq while data transferring. It also simulates a few TCP options such as: `MSS`, `sackOk`, `TS`, `TS_ack`, `wscale`. Firewalls will regard FakeTCP as a TCP connection, but its essentially UDP: it supports real-time/out-of-order delivery(just as normal UDP does), no congestion control or re-transmission. So there wont be any TCP over TCP problem when using OpenVPN.
+
+在假TCP标头模式，udp2raw 会在建立连接时模拟TCP的三次握手，在数据传输时模拟 seq 和 ack_seq。udp2raw同样会模拟一些TCP Options如：`MSS`, `sackOk`, `TS`, `TS_ack`, `wscale`。防火墙会把这些假TCP流量认作TCP流量，但实际上它们是UDP：因为虽然它同样支持普通TCP的实时/乱序传输，但不支持重传或者堵塞控制。所以不必担心在使用 OpenVPN 时遇到 TCP over TCP 问题。
+
+### Encryption, Anti-Replay
+
+# 加密与防重放
+
+* Encrypt your traffic with AES-128-CBC.
+* 使用 AES-128-CBC 加密流量
+* Protect data integrity by HMAC-SHA1 (or weaker MD5/CRC32).
+* 使用 HMAC-SHA1 或者查错能力较差的 MD5/CRC32 保证数据完整性
+* Defense replay attack with anti-replay window.
+* 使用“滑动窗口”防止重放攻击
+
+[Notes on encryption](https://github.com/wangyu-/udp2raw-tunnel/wiki/Notes-on-encryption)
+
+[有关加密的内容](https://github.com/wangyu-/udp2raw-tunnel/wiki/Notes-on-encryption)
+
+### Failure Dectection & Stabilization (Connection Recovery)
+
+### 断线检测与稳定性提升（连接恢复）
+
+Conection failures are detected by heartbeats. If timed-out, client will automatically change port number and reconnect. If reconnection is successful, the previous connection will be recovered, and all existing UDP conversations will stay vaild.
+
+心跳包会检测连接是否断开。如果连接超时，客户端将会自动切换端口号并重新连接。如果重连成功，原连接将会恢复，现有所有的 UDP 封包仍保持有效。
+
+For example, if you use udp2raw + OpenVPN, OpenVPN won't lose connection after any reconnect, **even if network cable is re-plugged or WiFi access point is changed**.
+
+例如，如果将 udp2raw 和 OpenVPN 配合使用，**就算是重插网线或者更换 Wi-Fi** 之类的重连， OpenVPN 也不会丢失连接。
+
+### Other Features

 ### 其他特性
-信道复用，client的udp端支持多个连接。

-server支持多个client，也能正确处理多个连接的重连和连接恢复。
+* **Multiplexing** One client can handle multiple UDP connections, all of which share the same raw connection.

-NAT 穿透 ，tcp icmp udp模式都支持nat穿透。
+* **单线复用** 一个客户端可承载多路 UDP 连接，同时使用一个 Raw 连接。

-支持Openvz，配合finalspeed使用，可以在openvz上用tcp模式的finalspeed
+* **Multiple Clients** One server can have multiple clients.

-支持Openwrt，没有编译依赖，容易编译到任何平台上。
+* **多客户端** 一个服务器可以被多个客户端连接。

-### 关键词
-突破udp qos,突破udp屏蔽，openvpn tcp over tcp problem,openvpn over icmp,udp to icmp tunnel,udp to tcp tunnel,udp via icmp,udp via tcp
+* **NAT Support** All of the 3 modes work in NAT environments.

-# 简明操作说明
+* **NAT 支持** 三种模式都支持 NAT 环境。
+
+* **OpenVZ Support** Tested on BandwagonHost VPS.
+
+* **OpenVZ 虚拟化支持** 已经在 BandwagonHost VPS上测试。
+
+* **Easy to Build** No dependencies.To cross-compile udp2raw,all you need to do is just to download a toolchain,modify makefile to point at the toolchain,run `make cross` then everything is done.(Note:Pre-compiled binaries for Desktop,RaspberryPi,Android,some Openwrt Routers are already included in [Releases](https://github.com/wangyu-/udp2raw-tunnel/releases))
+
+* **轻松构建** 没有依赖。跨平台编译 udp2raw 时，你只需要下载交叉编译链，修改 MAKEFILE 指向交叉编译链，运行 `make cross` 即可。（注：对于桌面端，树莓派，安卓与一部分 OpenWRT 路由器，预编译的可执行文件已经包含在  [Releases](https://github.com/wangyu-/udp2raw-tunnel/releases)。）
+
+### Keywords
+
+### 关键字
+
+`Bypass UDP QoS` `Bypass UDP Blocking` `Bypass OpenVPN TCP over TCP problem` `OpenVPN over ICMP` `UDP to ICMP tunnel` `UDP to TCP tunnel` `UDP over ICMP` `UDP over TCP`
+
+# Getting Started
+
+# 快速开始
+
+### Installing

 ### 安装
-下载编译好的二进制文件，解压到任意目录。

-https://github.com/wangyu-/udp2raw-tunnel/releases
+Download binary release from https://github.com/wangyu-/udp2raw-tunnel/releases
+
+在 https://github.com/wangyu-/udp2raw-tunnel/releases 下载可执行文件。
+
+### Running

 ### 运行
-假设你有一个server，ip为44.55.66.77，有一个服务监听在udp 7777端口。 假设你本地的主机到44.55.66.77的UDP流量被屏蔽了，或者被qos了

+Assume your UDP is blocked or being QOS-ed or just poorly supported. Assume your server ip is 44.55.66.77, you have a service listening on udp port 7777.
+
+假设你的 UDP 被封禁，被 QoS ，亦或只是支持较差。你有一台 IP 为 44.55.66.77 的服务器，上面有一个监听 UDP 端口 7777 的服务。
+
+```bash
+# 服务器
+./udp2raw_amd64 -s -l0.0.0.0:4096 -r 127.0.0.1:7777    -k "passwd" --raw-mode faketcp -a
+
+# 客户端
+./udp2raw_amd64 -c -l0.0.0.0:3333  -r44.55.66.77:4096  -k "passwd" --raw-mode faketcp -a
 ```
-在server端运行:
-./udp2raw_amd64 -s -l0.0.0.0:4096  -r127.0.0.1:7777   -k "passwd" --raw-mode faketcp   --cipher-mode xor  -a
+(The above commands need to be run as root. For better security, with some extra steps, you can run udp2raw as non-root. Check [this link](https://github.com/wangyu-/udp2raw-tunnel/wiki/run-udp2raw-as-non-root) for more info  )

-在client端运行:
-./udp2raw_amd64 -c -l0.0.0.0:3333  -r44.55.66.77:4096 -k "passwd" --raw-mode faketcp   --cipher-mode xor  -a
-```
-(以上例子需要用root账号运行。 用非root运行udp2raw需要一些额外的步骤，具体方法请看 [这个](https://github.com/wangyu-/udp2raw-tunnel/wiki/run-udp2raw-as-non-root) 链接。用非root运行更安全)
+（上面的指令运行需要 root 。可以通过几个步骤，以非 root 运行 udp2raw 获得更好的安全性。 可点击 [这个链接](https://github.com/wangyu-/udp2raw-tunnel/wiki/run-udp2raw-as-non-root) 了解更多。）

-###### Server端输出:
-![](/images/output_server.PNG)
-###### Client端输出:
-![](/images/output_client.PNG)
+###### Server Output:

-现在client和server之间建立起了，tunnel。想要在本地连接44.55.66.77:7777，只需要连接 127.0.0.1:3333。来回的所有的udp流量会被经过tunneling发送。在外界看起来是tcp流量，不会有udp流量暴露到公网。
+###### 服务器输出
+![](images/output_server.PNG)
+###### Client Output:

-### MTU设置(重要)
+###### 客户端输出
+![](images/output_client.PNG)

-不论你用udp2raw来加速kcptun还是vpn,为了稳定使用,都需要设置合理的MTU（在kcptun/vpn里设置，而不是在udp2raw里），建议把MTU设置成1200。client和server端都要设置。
+Now,an encrypted raw tunnel has been established between client and server through TCP port 4096. Connecting to UDP port 3333 at the client side is equivalent to connecting to port 7777 at the server side. No UDP traffic will be exposed.

-### 提醒
-`--cipher-mode xor`表示仅使用简单的XOR加密，这样可以节省CPU占用，以免CPU成为速度瓶颈。如果你需要更强的加密，可以去掉此选项，使用默认的AES加密。加密相关的选项见后文的`--cipher-mode`和`--auth-mode`。
+现在，在 TCP 端口 4096 上就建立起一个 raw 隧道。客户端对本地 UDP 端口 3333 的请求将会等同于请求服务器 UDP 端口 7777。没有任何暴露的 UDP 连接。

-如果要在anroid上运行，请看[Android简明教程](/doc/android_guide.md)
+### Note

-`-a`选项会自动添加一条/几条iptables规则，udp2raw必须和相应的iptables规则配合才能稳定工作，一定要注意不要忘了`-a`(这是个常见错误)。 如果你不想让udp2raw自动添加iptables规则，可以自己手动添加相应的iptables规则(看一下`-g`选项)，然后以不带`-a`的方式运行udp2raw。
+### 注
+To run on Android, check [Android_Guide](/doc/android_guide.md)

-# 进阶操作说明
+在安卓上运行请参考[Android_Guide](/doc/android_guide.md)。

-### 命令选项
+`-a` option automatically adds an iptables rule (or a few iptables rules) for you, udp2raw relies on this iptables rule to work stably. Be aware you dont forget `-a` (its a common mistake). If you dont want udp2raw to add iptables rule automatically, you can add it manually(take a look at `-g` option) and omit `-a`.
+
+`-a` 参数会自动加入保证 udp2raw 稳定运行的一条或几条 iptables 规则。这是一个常见问题，所以注意运行时有没有 `-a` 参数。如果你不希望 udp2raw 自动添加 iptables 规则，你可以手动添加规则并不加入 `-a` 选项。（请参考参数 `-g` 的用法。）
+
+# Advanced Topic
+### Usage
 ```
 udp2raw-tunnel
 git version:6e1df4b39f    build date:Oct 24 2017 09:21:15
@@ -155,138 +222,99 @@ other options:

 ```

-### iptables 规则,`-a`和`-g`
-用raw收发tcp包本质上绕过了linux内核的tcp协议栈。linux碰到raw socket发来的包会不认识，如果一直收到不认识的包，会回复大量RST，造成不稳定或性能问题。所以强烈建议添加iptables规则屏蔽Linux内核的对指定端口的处理。用-a选项，udp2raw会在启动的时候自动帮你加上Iptables规则，退出的时候再自动删掉。如果长期使用，可以用-g选项来生成相应的Iptables规则再自己手动添加，这样规则不会在udp2raw退出时被删掉，可以避免停掉udp2raw后内核向对端回复RST。
+### Iptables rules,`-a` and `-g`
+### IPTables 规则，选项 `-a` 和 `-g`
+This program sends packets via raw socket. In FakeTCP mode, Linux kernel TCP packet processing has to be blocked by a iptables rule on both sides, otherwise the kernel will automatically send RST for an unrecongized TCP packet and you will sustain from stability / peformance problems. You can use `-a` option to let the program automatically add / delete iptables rule on start / exit. You can also use the `-g` option to generate iptables rule and add it manually.

-用raw收发udp包也类似，只是内核回复的是icmp unreachable。而用raw 收发icmp，内核会自动回复icmp echo。都需要相应的iptables规则。
-### `--cipher-mode` 和 `--auth-mode` 
-如果要最大的安全性建议用aes128cbc+hmac_sha1。如果要运行在路由器上，建议用xor+simple，可以节省CPU。但是注意xor+simple只能骗过防火墙的包检测，不能防止真正的攻击者。
+udp2raw 用 raw socket 发送数据包。在 假TCP 封包模式，Linux 内核的 TCP 封包处理必须在双向 IPTables 启用的情况下进行，否则 Linux 内核将会自动重置未识别的 TCP 封包，此时就会遇到稳定性/性能问题。可以使用 `-a` 选项让 udp2raw 在启动或停止时自动添加或删除 iptables 规则。你也可以使用 `-g` 选项来生成 iptables 规则并手动添加。
+
+### `--cipher-mode` and `--auth-mode`
+### 选项 `--cipher-mode` 和`--auth-mode`
+It is suggested to use `aes128cbc` + `hmac_sha1` to obtain maximum security. If you want to run the program on a router, you can try `xor` + `simple`, which can fool packet inspection by firewalls the most of time, but it cannot protect you from serious attacks. Mode none is only for debugging purpose. It is not recommended to set the cipher-mode or auth-mode to none.
+
+建议使用 `aes128cbc` + `hmac_sha1` 以获得最佳安全性。如果你想在你的路由器上使用 udp2raw ，你可以尝试大多数情况下可以骗过防火墙的封包检查，但无法防止严重攻击的 `xor` + `simple` 。仅在调试模式下将这两个选项设为 `none` ，这是不建议的。

 ### `--seq-mode`
-facktcp模式并没有模拟tcp的全部。所以理论上有办法把faketcp和真正的tcp流量区分开来（虽然大部分ISP不太可能做这种程度的包检测）。seq-mode可以改变一些seq ack的行为。如果遇到了连接问题，可以尝试更改。在我这边的移动线路用3种模式都没问题。

-### `--keep-rule`
-定期主动检查iptables，如果udp2raw添加的iptables规则丢了，就重新添加。在一些iptables可能会被其他程序清空的情况下(比如梅林固件和openwrt的路由器)格外有用。
+### 选项 `--seq-mode`

-### `--fifo`
-指定一个fifo(named pipe)来向运行中的程序发送命令，例如`--fifo fifo.file`：
+The FakeTCP mode does not behave 100% like a real tcp connection. ISPs may be able to distinguish the simulated tcp traffic from the real TCP traffic (though it's costly). seq-mode can help you change the seq increase behavior slightly. If you experience connection problems, try to change the value.

-在client端,可以用`echo reconnect >fifo.file`来强制client换端口重连（上层不断线）.对Server，目前没有效果。
+假TCP 封包模式并不 100% 表现得像真 TCP 连接。ISP可能有能力将 假TCP 与 真TCP 连接区分开，尽管开销很大。 `seq-mode` 可以给 seq 增加行为做略微修改。如果你遇到了问题，尝试修改这个选项。

 ### `--lower-level`
-大部分udp2raw不能连通的情况都是设置了不兼容的iptables造成的。--lower-level选项允许绕过本地iptables。在一些iptables不好改动的情况下尤其有效（比如你用的是梅林固件，iptables全是固件自己生成的）。
+`--lower-level` allows you to send packet at OSI level 2(link level),so that you can bypass any local iptables rules. If you have a complicated iptables rules which conflicts with udp2raw and you cant(or too lazy to) edit the iptables rules,`--lower-level` can be very useful. Try `--lower-level auto` to auto detect the parameters,you can specify it manually if `auto` fails.

-##### 格式
-`if_name#dest_mac_adress`,例如 `eth0#00:23:45:67:89:b9` 。`eth0`换成你的出口网卡名。`00:23:45:67:89:b9`换成网关的mac地址（如果client和server在同一个局域网内，可能不需要网关，这时候直接用对方主机的mac地址，这个属于罕见的应用场景，可以忽略）。
+Manual format `if_name#dest_mac_adress`,ie:`eth0#00:23:45:67:89:b9`.

-可以用`--lower-level auto`自动获取参数，如果获取参数失败，再手动填写。
-
-##### client端获得--lower-level参数的办法
-在client 端，运行`traceroute <server_ip>`，记下第一跳的地址，这个就是`网关ip`。再运行`arp -s <网关ip>`，可以同时查到出口网卡名和mac。
-
-![](/images/lower_level.PNG)
-
-如果traceroute第一跳结果是`* * *`，说明网关屏蔽了对traceroute的应答。需要用`ip route`或`route`查询网关：
-
-![](/images/route.PNG)
-##### server端获得--lower-level参数的办法
-如果client有公网ip，就`traceroute <client_ip>`。下一步和client端的方法一样。
-
-如果client没有公网ip，就`traceroute google.com` 或`traceroute baidu.com`。下一步和client端的方法一样。
-
-server端也可以用`--lower-level auto` 来尝试自动获得参数，如果无法连接再手动填写。
-
-##### 注意
-如果用了`--lower-level`选项。server虽然还可以bind在0.0.0.0，但是因为你显式指定了网络接口，就只能工作在这一个网络接口了。
-
-如果`arps -s`命令查询不到，首先再试几次。如果还是查询不到，那么可能是因为你用的是pppoe方式的拨号宽带，查询不到是正常的。这种情况下`if_name`填pppoe产生的虚拟interface，通常名字叫`pppXXXX`，从`ifconfig`命令的输出里找一下；`des_mac_adress`填`00:00:00:00:00:00`,例如`ppp0#00:00:00:00:00:00`
+### `--keep-rule`
+Monitor iptables and auto re-add iptables rules(for blocking kernel tcp processing) if necessary.Especially useful when iptables rules may be cleared by other programs(for example,if you are using openwrt,everytime you changed and commited a setting,iptables rule may be cleared and re-constructed).

 ### `--conf-file`

-为了避免将密码等私密信息暴露给`ps`命令，你也可以使用 `配置文件` 来存储参数。
+You can also load options from a configuration file in order to keep secrets away from `ps` command.

-比如，将以上服务端参数改写成配置文件
+For example, rewrite the options for the above `server` example (in Getting Started section) into configuration file:

-`server.conf`:
+`server.conf`

 ```
 -s
-# 你可以像这样添加注释
-# 注意，只有整行注释才能在配置文件里使用
-# 注释必须独占一行
+# You can add comments like this
+# Comments MUST occupy an entire line
+# Or they will not work as expected
+# Listen address
 -l 0.0.0.0:4096
+# Remote address
 -r 127.0.0.1:7777
 -a
 -k passwd
 --raw-mode faketcp
 ```

-注意，当写入配置文件的时候，密码等参数两边的引号必须去除。
+Pay attention to the `-k` parameter: In command line mode the quotes around the password will be removed by shell. In configuration files we do not remove quotes.

-然后就可以使用下面的方式启动服务端
+Then start the server with

 ```bash
 ./udp2raw_amd64 --conf-file server.conf
 ```

-# 性能测试
-iperf3 的UDP模式有BUG，所以，这里用iperf3的tcp模式，配合Openvpn，测试udp2raw的性能。（iperf3 udp issue ,https://github.com/esnet/iperf/issues/296 ）
+### `--fifo`
+Use a fifo(named pipe) for sending commands to the running program. For example `--fifo fifo.file`.

-openvpn关掉了自带的加密。
-#### iperf3 命令: 
+At client side,you can use `echo reconnect >fifo.file` to force client to reconnect.Currently no command has been implemented for server.
+
+# Peformance Test
+#### Test method:
+iperf3 TCP via OpenVPN + udp2raw
+(iperf3 UDP mode is not used because of a bug mentioned in this issue: https://github.com/esnet/iperf/issues/296 . Instead, we package the TCP traffic into UDP by OpenVPN to test the performance. Read [Application](https://github.com/wangyu-/udp2raw-tunnel#application) for details.
+
+#### iperf3 command:
 ```
-iperf3 -c 10.222.2.1 -P40 
+iperf3 -c 10.222.2.1 -P40
 iperf3 -c 10.222.2.1 -P40 -R
 ```
-#### client主机
-vultr 2.5美元每月套餐(single core 2.4ghz cpu,512m ram,日本东京机房),
-#### server主机
-bandwagonhost 3.99美元每年套餐(single core 2.0ghz cpu,128m ram,美国洛杉矶机房)
-### 测试1
+#### Environments
+* **Client** Vultr $2.5/monthly plan (single core 2.4GHz cpu, 512MB RAM, Tokyo, Japan)
+* **Server** BandwagonHost $3.99/annually plan (single core 2.0GHz cpu, 128MB RAM, Los Angeles, USA)
+
+### Test1
 raw_mode: faketcp  cipher_mode: xor  auth_mode: simple

-![image4](/images/image4.PNG)
+![image4](images/image4.PNG)

-（反向的速度几乎一样，所以只发正向测试的图)
+(reverse speed was simliar and not uploaded)

-测试中cpu被打满。其中有30%的cpu是被openvpn占的。 如果不用Openvpn中转，实际达到100+Mb/S 应该没问题。
-
-### 测试2
+### Test2
 raw_mode: faketcp  cipher_mode: aes128cbc  auth_mode: md5

-![image5](/images/image5.PNG)
+![image5](images/image5.PNG)

-（反向的速度几乎一样，所以只发正向测试的图)
-
-测试中cpu被打满。绝大多数cpu都是被udp2raw占用的（主要消耗在aes加密）。即使不用Openvpn，速度也不会快很多了。
-# 应用
-### 中转 kcptun
-[udp2raw+kcptun step_by_step教程](kcptun_step_by_step.md)
-### 中转 finalspeed
-[udp2raw+finalspeed step_by_step教程](finalspeed_step_by_step.md)
-# 如何自己编译
-[编译教程](build_guide.zh-cn.md)
-# 相关repo
-### kcptun-raw
-udp2raw was inspired by kcptun-raw,which modified kcptun to support tcp mode.
-
-https://github.com/Chion82/kcptun-raw
-### relayRawSocket
-kcptun-raw was inspired by relayRawSocket. A simple  udp to raw tunnel,wrote in python
-
-https://github.com/linhua55/some_kcptun_tools/tree/master/relayRawSocket
-### kcpraw
-another project of kcptun with tcp mode
-
-https://github.com/ccsexyz/kcpraw
-### icmptunnel
-Transparently tunnel your IP traffic through ICMP echo and reply packets.
-
-https://github.com/DhavalKapil/icmptunnel
+(reverse speed was simliar and not uploaded)

 # wiki

-更多内容请看 wiki:
+Check wiki for more info:

 https://github.com/wangyu-/udp2raw-tunnel/wiki
-
--- a/encrypt.cpp
+++ b/encrypt.cpp
--- a/encrypt.h
+++ b/encrypt.h
@@ -1,33 +1,35 @@
 #ifndef UDP2RAW_ENCRYPTION_H_
 #define UDP2RAW_ENCRYPTION_H_

-
-
 //#include "aes.h"
 //#include "md5.h"
 #include "common.h"

+// using namespace std;
+// extern char key[16];

-//using namespace std;
-//extern char key[16];
-
-const int aes_key_optimize=1; //if enabled,once you used a key for aes,you cant change it anymore
+const int aes_key_optimize = 1;  // if enabled,once you used a key for aes,you cant change it anymore
 extern int aes128cfb_old;

-int my_init_keys(const char *,int);
+int my_init_keys(const char *, int);

-int my_encrypt(const char *data,char *output,int &len);
-int my_decrypt(const char *data,char *output,int &len);
+int my_encrypt(const char *data, char *output, int &len);
+int my_decrypt(const char *data, char *output, int &len);

+unsigned short csum(const unsigned short *ptr, int nbytes);

-unsigned short csum(const unsigned short *ptr,int nbytes) ;
-
-
-enum auth_mode_t {auth_none=0,auth_md5,auth_crc32,auth_simple,auth_hmac_sha1,auth_end};
-
-
-enum cipher_mode_t {cipher_none=0,cipher_aes128cbc,cipher_xor,cipher_aes128cfb,cipher_end};
+enum auth_mode_t { auth_none = 0,
+                   auth_md5,
+                   auth_crc32,
+                   auth_simple,
+                   auth_hmac_sha1,
+                   auth_end };

+enum cipher_mode_t { cipher_none = 0,
+                     cipher_aes128cbc,
+                     cipher_xor,
+                     cipher_aes128cfb,
+                     cipher_end };

 extern auth_mode_t auth_mode;
 extern cipher_mode_t cipher_mode;
@@ -35,13 +37,13 @@ extern cipher_mode_t cipher_mode;
 extern unordered_map<int, const char *> auth_mode_tostring;
 extern unordered_map<int, const char *> cipher_mode_tostring;

-extern char gro_xor[256+100];
+extern char gro_xor[256 + 100];

-int cipher_decrypt(const char *data,char *output,int &len,char * key);//internal interface ,exposed for test only
-int cipher_encrypt(const char *data,char *output,int &len,char * key);//internal interface ,exposed for test only
+int cipher_decrypt(const char *data, char *output, int &len, char *key);  // internal interface ,exposed for test only
+int cipher_encrypt(const char *data, char *output, int &len, char *key);  // internal interface ,exposed for test only

-void aes_ecb_encrypt(const char *data,char *output);
-void aes_ecb_decrypt(const char *data,char *output);
+void aes_ecb_encrypt(const char *data, char *output);
+void aes_ecb_decrypt(const char *data, char *output);

 void aes_ecb_encrypt1(char *data);
 void aes_ecb_decrypt1(char *data);
--- a/fd_manager.cpp
+++ b/fd_manager.cpp
@@ -5,60 +5,49 @@
 *      Author: root
 */

-
 #include "fd_manager.h"
-int fd_manager_t::fd_exist(int fd)
-{
-	return fd_to_fd64_mp.find(fd)!=fd_to_fd64_mp.end();
+int fd_manager_t::fd_exist(int fd) {
+    return fd_to_fd64_mp.find(fd) != fd_to_fd64_mp.end();
 }
-int fd_manager_t::exist(fd64_t fd64)
-{
-	return fd64_to_fd_mp.find(fd64)!=fd64_to_fd_mp.end();
+int fd_manager_t::exist(fd64_t fd64) {
+    return fd64_to_fd_mp.find(fd64) != fd64_to_fd_mp.end();
 }
-int fd_manager_t::to_fd(fd64_t fd64)
-{
-	assert(exist(fd64));
-	return fd64_to_fd_mp[fd64];
+int fd_manager_t::to_fd(fd64_t fd64) {
+    assert(exist(fd64));
+    return fd64_to_fd_mp[fd64];
 }
-void fd_manager_t::fd64_close(fd64_t fd64)
-{
-	assert(exist(fd64));
-	int fd=fd64_to_fd_mp[fd64];
-	fd64_to_fd_mp.erase(fd64);
-	fd_to_fd64_mp.erase(fd);
-	if(exist_info(fd64))
-	{
-		fd_info_mp.erase(fd64);
-	}
-	//assert(close(fd)==0);
-	sock_close(fd);
+void fd_manager_t::fd64_close(fd64_t fd64) {
+    assert(exist(fd64));
+    int fd = fd64_to_fd_mp[fd64];
+    fd64_to_fd_mp.erase(fd64);
+    fd_to_fd64_mp.erase(fd);
+    if (exist_info(fd64)) {
+        fd_info_mp.erase(fd64);
+    }
+    // assert(close(fd)==0);
+    sock_close(fd);
 }
-void fd_manager_t::reserve(int n)
-{
-	fd_to_fd64_mp.reserve(n);
-	fd64_to_fd_mp.reserve(n);
-	fd_info_mp.reserve(n);
+void fd_manager_t::reserve(int n) {
+    fd_to_fd64_mp.reserve(n);
+    fd64_to_fd_mp.reserve(n);
+    fd_info_mp.reserve(n);
 }
-u64_t fd_manager_t::create(int fd)
-{
-	assert(!fd_exist(fd));
-	fd64_t fd64=counter++;
-	fd_to_fd64_mp[fd]=fd64;
-	fd64_to_fd_mp[fd64]=fd;
-	return fd64;
+u64_t fd_manager_t::create(int fd) {
+    assert(!fd_exist(fd));
+    fd64_t fd64 = counter++;
+    fd_to_fd64_mp[fd] = fd64;
+    fd64_to_fd_mp[fd64] = fd;
+    return fd64;
 }
-fd_manager_t::fd_manager_t()
-{
-	counter=u32_t(-1);
-	counter+=100;
-	reserve(10007);
+fd_manager_t::fd_manager_t() {
+    counter = u32_t(-1);
+    counter += 100;
+    reserve(10007);
 }
-fd_info_t & fd_manager_t::get_info(fd64_t fd64)
-{
-	assert(exist(fd64));
-	return fd_info_mp[fd64];
+fd_info_t& fd_manager_t::get_info(fd64_t fd64) {
+    assert(exist(fd64));
+    return fd_info_mp[fd64];
 }
-int fd_manager_t::exist_info(fd64_t fd64)
-{
-	return fd_info_mp.find(fd64)!=fd_info_mp.end();
+int fd_manager_t::exist_info(fd64_t fd64) {
+    return fd_info_mp.find(fd64) != fd_info_mp.end();
 }
--- a/fd_manager.h
+++ b/fd_manager.h
@@ -12,31 +12,31 @@
 //#include "packet.h"
 #include "connection.h"

-struct fd_info_t
-{
-	//ip_port_t ip_port;
-	conn_info_t *p_conn_info;
+struct fd_info_t {
+    // ip_port_t ip_port;
+    conn_info_t *p_conn_info;
 };

-struct fd_manager_t   //conver fd to a uniq 64bit number,avoid fd value conflict caused by close and re-create
-//this class is not strictly necessary,it just makes epoll fd handling easier
+struct fd_manager_t  // conver fd to a uniq 64bit number,avoid fd value conflict caused by close and re-create
+// this class is not strictly necessary,it just makes epoll fd handling easier
 {
-	fd_info_t & get_info(fd64_t fd64);
-	int exist_info(fd64_t);
-	int exist(fd64_t fd64);
-	int to_fd(fd64_t);
-	void fd64_close(fd64_t fd64);
-	void reserve(int n);
-	u64_t create(int fd);
-	fd_manager_t();
-private:
-	u64_t counter;
-	unordered_map<int,fd64_t> fd_to_fd64_mp;
-	unordered_map<fd64_t,int> fd64_to_fd_mp;
-	unordered_map<fd64_t,fd_info_t> fd_info_mp;
-	int fd_exist(int fd);
-	//void remove_fd(int fd);
-	//fd64_t fd_to_fd64(int fd);
+    fd_info_t &get_info(fd64_t fd64);
+    int exist_info(fd64_t);
+    int exist(fd64_t fd64);
+    int to_fd(fd64_t);
+    void fd64_close(fd64_t fd64);
+    void reserve(int n);
+    u64_t create(int fd);
+    fd_manager_t();
+
+   private:
+    u64_t counter;
+    unordered_map<int, fd64_t> fd_to_fd64_mp;
+    unordered_map<fd64_t, int> fd64_to_fd_mp;
+    unordered_map<fd64_t, fd_info_t> fd_info_mp;
+    int fd_exist(int fd);
+    // void remove_fd(int fd);
+    // fd64_t fd_to_fd64(int fd);
 };

 extern fd_manager_t fd_manager;
--- a/log.cpp
+++ b/log.cpp
@@ -1,62 +1,57 @@
 #include "log.h"
 #include "misc.h"

-int log_level=log_info;
+int log_level = log_info;

-int enable_log_position=0;
-int enable_log_color=1;
+int enable_log_position = 0;
+int enable_log_color = 1;

-void log0(const char * file,const char * function,int line,int level,const char* str, ...) {
+void log0(const char* file, const char* function, int line, int level, const char* str, ...) {
+    if (level > log_level) return;
+    if (level > log_trace || level < 0) return;

-	if(level>log_level) return ;
-	if(level>log_trace||level<0) return ;
+    time_t timer;
+    char buffer[100];
+    struct tm* tm_info;

+    time(&timer);
+    tm_info = localtime(&timer);

-	time_t timer;
-	char buffer[100];
-	struct tm* tm_info;
+    if (enable_log_color)
+        printf("%s", log_color[level]);

-	time(&timer);
-	tm_info = localtime(&timer);
+    strftime(buffer, 100, "%Y-%m-%d %H:%M:%S", tm_info);
+    printf("[%s][%s]", buffer, log_text[level]);

-	if(enable_log_color)
-		printf("%s",log_color[level]);
+    if (enable_log_position) printf("[%s,func:%s,line:%d]", file, function, line);

-	strftime(buffer, 100, "%Y-%m-%d %H:%M:%S", tm_info);
-	printf("[%s][%s]",buffer,log_text[level]);
+    va_list vlist;
+    va_start(vlist, str);
+    vfprintf(stdout, str, vlist);
+    va_end(vlist);
+    if (enable_log_color)
+        printf("%s", RESET);

-	if(enable_log_position)printf("[%s,func:%s,line:%d]",file,function,line);
+    // printf("\n");
+    // if(enable_log_color)
+    // printf(log_color[level]);
+    fflush(stdout);

-	va_list vlist;
-	va_start(vlist, str);
-	vfprintf(stdout, str, vlist);
-	va_end(vlist);
-	if(enable_log_color)
-		printf("%s",RESET);
-
-	//printf("\n");
-	//if(enable_log_color)
-		//printf(log_color[level]);
-	fflush(stdout);
-
-	if(log_level==log_fatal)
-	{
-		about_to_exit=1;
-	}
+    if (log_level == log_fatal) {
+        about_to_exit = 1;
+    }
 }

-void log_bare(int level,const char* str, ...)
-{
-	if(level>log_level) return ;
-	if(level>log_trace||level<0) return ;
-	if(enable_log_color)
-		printf("%s",log_color[level]);
-	va_list vlist;
-	va_start(vlist, str);
-	vfprintf(stdout, str, vlist);
-	va_end(vlist);
-	if(enable_log_color)
-		printf("%s",RESET);
-	fflush(stdout);
-
+void log_bare(int level, const char* str, ...) {
+    if (level > log_level) return;
+    if (level > log_trace || level < 0) return;
+    if (enable_log_color)
+        printf("%s", log_color[level]);
+    va_list vlist;
+    va_start(vlist, str);
+    vfprintf(stdout, str, vlist);
+    va_end(vlist);
+    if (enable_log_color)
+        printf("%s", RESET);
+    fflush(stdout);
 }
--- a/log.h
+++ b/log.h
@@ -2,53 +2,46 @@
 #ifndef UDP2RAW_LOG_MYLOG_H_
 #define UDP2RAW_LOG_MYLOG_H_

-
 #include "common.h"

-
 using namespace std;

-
-#define RED   "\x1B[31m"
-#define GRN   "\x1B[32m"
-#define YEL   "\x1B[33m"
-#define BLU   "\x1B[34m"
-#define MAG   "\x1B[35m"
-#define CYN   "\x1B[36m"
-#define WHT   "\x1B[37m"
+#define RED "\x1B[31m"
+#define GRN "\x1B[32m"
+#define YEL "\x1B[33m"
+#define BLU "\x1B[34m"
+#define MAG "\x1B[35m"
+#define CYN "\x1B[36m"
+#define WHT "\x1B[37m"
 #define RESET "\x1B[0m"

+const int log_never = 0;
+const int log_fatal = 1;
+const int log_error = 2;
+const int log_warn = 3;
+const int log_info = 4;
+const int log_debug = 5;
+const int log_trace = 6;
+const int log_end = 7;

-const int log_never=0;
-const int log_fatal=1;
-const int log_error=2;
-const int log_warn=3;
-const int log_info=4;
-const int log_debug=5;
-const int log_trace=6;
-const int log_end=7;
-
-const char log_text[][20]={"NEVER","FATAL","ERROR","WARN","INFO","DEBUG","TRACE",""};
-const char log_color[][20]={RED,RED,RED,YEL,GRN,MAG,""};
+const char log_text[][20] = {"NEVER", "FATAL", "ERROR", "WARN", "INFO", "DEBUG", "TRACE", ""};
+const char log_color[][20] = {RED, RED, RED, YEL, GRN, MAG, ""};

 extern int log_level;
 extern int enable_log_position;
 extern int enable_log_color;

-
 #ifdef MY_DEBUG
-#define mylog(__first_argu__dummy_abcde__,...) printf(__VA_ARGS__)
+#define mylog(__first_argu__dummy_abcde__, ...) printf(__VA_ARGS__)

 #else
-#define mylog(...) log0(__FILE__,__FUNCTION__,__LINE__,__VA_ARGS__)
+#define mylog(...) log0(__FILE__, __FUNCTION__, __LINE__, __VA_ARGS__)
 #endif

-
 //#define mylog(__first_argu__dummy_abcde__,...) {;}

-void log0(const char * file,const char * function,int line,int level,const char* str, ...);
-
-void log_bare(int level,const char* str, ...);
+void log0(const char* file, const char* function, int line, int level, const char* str, ...);

+void log_bare(int level, const char* str, ...);

 #endif
--- a/main.cpp
+++ b/main.cpp
@@ -7,96 +7,100 @@
 #include "encrypt.h"
 #include "fd_manager.h"

-void sigpipe_cb(struct ev_loop *l, ev_signal *w, int revents)
-{
-	mylog(log_info, "got sigpipe, ignored");
+void sigpipe_cb(struct ev_loop *l, ev_signal *w, int revents) {
+    mylog(log_info, "got sigpipe, ignored");
 }

-void sigterm_cb(struct ev_loop *l, ev_signal *w, int revents)
-{
-	mylog(log_info, "got sigterm, exit");
-	myexit(0);
+void sigterm_cb(struct ev_loop *l, ev_signal *w, int revents) {
+    mylog(log_info, "got sigterm, exit");
+    myexit(0);
 }

-void sigint_cb(struct ev_loop *l, ev_signal *w, int revents)
-{
-	mylog(log_info, "got sigint, exit");
-	myexit(0);
+void sigint_cb(struct ev_loop *l, ev_signal *w, int revents) {
+    mylog(log_info, "got sigint, exit");
+    myexit(0);
 }

 int client_event_loop();
 int server_event_loop();

-int main(int argc, char *argv[])
-{
-	assert(sizeof(unsigned short)==2);
-	assert(sizeof(unsigned int)==4);
-	assert(sizeof(unsigned long long)==8);
+int main(int argc, char *argv[]) {
+    assert(sizeof(unsigned short) == 2);
+    assert(sizeof(unsigned int) == 4);
+    assert(sizeof(unsigned long long) == 8);

-	dup2(1, 2);//redirect stderr to stdout
+#ifdef UDP2RAW_MP
+    init_ws();
+#endif
+
+    dup2(1, 2);  // redirect stderr to stdout
 #if defined(__MINGW32__)
-    enable_log_color=0;
+    enable_log_color = 0;
 #endif

-	pre_process_arg(argc,argv);
+    pre_process_arg(argc, argv);

-	if(program_mode==client_mode)
-	{
-		struct ev_loop* loop=ev_default_loop(0);
+    ev_signal signal_watcher_sigpipe;
+    ev_signal signal_watcher_sigterm;
+    ev_signal signal_watcher_sigint;
+
+    if (program_mode == client_mode) {
+        struct ev_loop *loop = ev_default_loop(0);
 #if !defined(__MINGW32__)
-		ev_signal signal_watcher_sigpipe;
-		ev_signal_init(&signal_watcher_sigpipe, sigpipe_cb, SIGPIPE);
-		ev_signal_start(loop, &signal_watcher_sigpipe);
+        ev_signal_init(&signal_watcher_sigpipe, sigpipe_cb, SIGPIPE);
+        ev_signal_start(loop, &signal_watcher_sigpipe);
 #endif
+        ev_signal_init(&signal_watcher_sigterm, sigterm_cb, SIGTERM);
+        ev_signal_start(loop, &signal_watcher_sigterm);

-		ev_signal signal_watcher_sigterm;
-		ev_signal_init(&signal_watcher_sigterm, sigterm_cb, SIGTERM);
-		ev_signal_start(loop, &signal_watcher_sigterm);
-
-		ev_signal signal_watcher_sigint;
-		ev_signal_init(&signal_watcher_sigint, sigint_cb, SIGINT);
-		ev_signal_start(loop, &signal_watcher_sigint);
-	}
-	else
-	{
-		signal(SIGINT, signal_handler);
-		signal(SIGHUP, signal_handler);
-		signal(SIGKILL, signal_handler);
-		signal(SIGTERM, signal_handler);
-		signal(SIGQUIT, signal_handler);
-	}
+        ev_signal_init(&signal_watcher_sigint, sigint_cb, SIGINT);
+        ev_signal_start(loop, &signal_watcher_sigint);
+    } else {
+#ifdef UDP2RAW_LINUX
+        signal(SIGINT, signal_handler);
+        signal(SIGHUP, signal_handler);
+        signal(SIGKILL, signal_handler);
+        signal(SIGTERM, signal_handler);
+        signal(SIGQUIT, signal_handler);
+#else
+        mylog(log_fatal, "server mode not supported in multi-platform version\n");
+        myexit(-1);
+#endif
+    }
 #if !defined(__MINGW32__)
-	if(geteuid() != 0)
-	{
-		mylog(log_warn,"root check failed, it seems like you are using a non-root account. we can try to continue, but it may fail. If you want to run udp2raw as non-root, you have to add iptables rule manually, and grant udp2raw CAP_NET_RAW capability, check README.md in repo for more info.\n");
-	}
-	else
-	{
-		mylog(log_warn,"you can run udp2raw with non-root account for better security. check README.md in repo for more info.\n");
-	}
+    if (geteuid() != 0) {
+        mylog(log_warn, "root check failed, it seems like you are using a non-root account. we can try to continue, but it may fail. If you want to run udp2raw as non-root, you have to add iptables rule manually, and grant udp2raw CAP_NET_RAW capability, check README.md in repo for more info.\n");
+    } else {
+        mylog(log_warn, "you can run udp2raw with non-root account for better security. check README.md in repo for more info.\n");
+    }
 #endif

-	mylog(log_info,"remote_ip=[%s], make sure this is a vaild IP address\n",remote_addr.get_ip());
+    mylog(log_info, "remote_ip=[%s], make sure this is a vaild IP address\n", remote_addr.get_ip());

-	//init_random_number_fd();
-	srand(get_true_random_number_nz());
-	const_id=get_true_random_number_nz();
+    // init_random_number_fd();
+    srand(get_true_random_number_nz());
+    const_id = get_true_random_number_nz();

-	mylog(log_info,"const_id:%x\n",const_id);
+    mylog(log_info, "const_id:%x\n", const_id);

-	my_init_keys(key_string,program_mode==client_mode?1:0);
+    my_init_keys(key_string, program_mode == client_mode ? 1 : 0);

-	iptables_rule();
-	init_raw_socket();
+    iptables_rule();

-	if(program_mode==client_mode)
-	{
-		client_event_loop();
-	}
-	else
-	{
-		server_event_loop();
-	}
+#ifdef UDP2RAW_LINUX
+    init_raw_socket();
+#endif

-	return 0;
+    if (program_mode == client_mode) {
+        client_event_loop();
+    } else {
+#ifdef UDP2RAW_LINUX
+        server_event_loop();
+#else
+        mylog(log_fatal, "server mode not supported in multi-platform version\n");
+        myexit(-1);
+#endif
+    }
+
+    return 0;
 }
--- a/148
+++ b/148
@@ -1,96 +1,134 @@
 cc_cross=/home/wangyu/Desktop/arm-2014.05/bin/arm-none-linux-gnueabi-g++
 cc_local=g++
-#cc_local=/opt/cross/x86_64-linux-musl/bin/x86_64-linux-musl-g++
-#cc_mips34kc=/toolchains/OpenWrt-SDK-ar71xx-for-linux-x86_64-gcc-4.8-linaro_uClibc-0.9.33.2/staging_dir/toolchain-mips_34kc_gcc-4.8-linaro_uClibc-0.9.33.2/bin/mips-openwrt-linux-g++
 cc_mips24kc_be=/toolchains/lede-sdk-17.01.2-ar71xx-generic_gcc-5.4.0_musl-1.1.16.Linux-x86_64/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.16/bin/mips-openwrt-linux-musl-g++
 cc_mips24kc_le=/toolchains/lede-sdk-17.01.2-ramips-mt7621_gcc-5.4.0_musl-1.1.16.Linux-x86_64/staging_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/bin/mipsel-openwrt-linux-musl-g++
-#cc_arm= /toolchains/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-g++ -march=armv6 -marm 
-cc_arm= /toolchains/arm-2014.05/bin/arm-none-linux-gnueabi-g++
-#cc_arm=/toolchains/lede-sdk-17.01.2-brcm2708-bcm2708_gcc-5.4.0_musl-1.1.16_eabi.Linux-x86_64/staging_dir/toolchain-arm_arm1176jzf-s+vfp_gcc-5.4.0_musl-1.1.16_eabi/bin/arm-openwrt-linux-muslgnueabi-g++
+cc_arm= /toolchains/lede-sdk-17.01.2-bcm53xx_gcc-5.4.0_musl-1.1.16_eabi.Linux-x86_64/staging_dir/toolchain-arm_cortex-a9_gcc-5.4.0_musl-1.1.16_eabi/bin/arm-openwrt-linux-c++
+cc_mingw_cross=i686-w64-mingw32-g++-posix
+cc_mac_cross=o64-clang++ -stdlib=libc++
+cc_x86=/toolchains/lede-sdk-17.01.2-x86-generic_gcc-5.4.0_musl-1.1.16.Linux-x86_64/staging_dir/toolchain-i386_pentium4_gcc-5.4.0_musl-1.1.16/bin/i486-openwrt-linux-c++
+cc_amd64=/toolchains/lede-sdk-17.01.2-x86-64_gcc-5.4.0_musl-1.1.16.Linux-x86_64/staging_dir/toolchain-x86_64_gcc-5.4.0_musl-1.1.16/bin/x86_64-openwrt-linux-c++
 #cc_bcm2708=/home/wangyu/raspberry/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-g++ 
-cc_tmp= /home/wangyu/OpenWrt-SDK-15.05-x86-64_gcc-4.8-linaro_uClibc-0.9.33.2.Linux-x86_64/staging_dir/toolchain-x86_64_gcc-4.8-linaro_uClibc-0.9.33.2/bin/x86_64-openwrt-linux-uclibc-g++

-FLAGS= -std=c++11 -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter -Wno-missing-field-initializers ${OPT}

-COMMON=main.cpp lib/md5.cpp lib/pbkdf2-sha1.cpp lib/pbkdf2-sha256.cpp encrypt.cpp log.cpp network.cpp common.cpp  connection.cpp misc.cpp fd_manager.cpp client.cpp server.cpp -lpthread my_ev.cpp -isystem libev
-SOURCES= $(COMMON) lib/aes_faster_c/aes.cpp lib/aes_faster_c/wrapper.cpp
-SOURCES_TINY_AES= $(COMMON) lib/aes.c
-SOURCES_AES_ACC=$(COMMON) $(wildcard lib/aes_acc/aes*.c)
+FLAGS= -std=c++11   -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter -Wno-missing-field-initializers ${OPT}
+
+COMMON=main.cpp lib/md5.cpp lib/pbkdf2-sha1.cpp lib/pbkdf2-sha256.cpp encrypt.cpp log.cpp network.cpp common.cpp  connection.cpp misc.cpp fd_manager.cpp client.cpp server.cpp -lpthread
+
+SOURCES0= $(COMMON) lib/aes_faster_c/aes.cpp lib/aes_faster_c/wrapper.cpp
+SOURCES= ${SOURCES0} my_ev.cpp -isystem libev
+SOURCES_AES_ACC= $(COMMON) $(wildcard lib/aes_acc/aes*.c) my_ev.cpp -isystem libev
+PCAP="-lpcap"
+MP="-DUDP2RAW_MP"
+

 NAME=udp2raw
-TARGETS=amd64 arm amd64_hw_aes arm_asm_aes mips24kc_be mips24kc_be_asm_aes x86 x86_asm_aes mips24kc_le mips24kc_le_asm_aes
-TAR=${NAME}_binaries.tar.gz `echo ${TARGETS}|sed -r 's/([^ ]+)/udp2raw_\1/g'` version.txt

+TARGETS=amd64 arm amd64_hw_aes arm_asm_aes mips24kc_be mips24kc_be_asm_aes x86 x86_asm_aes mips24kc_le mips24kc_le_asm_aes
+
+TAR=${NAME}_binaries.tar.gz `echo ${TARGETS}|sed -r 's/([^ ]+)/${NAME}_\1/g'` version.txt
+
+TARGETS_MP= mingw_cross mingw_cross_wepoll mac_cross
+
+export STAGING_DIR=/tmp/    #just for supress warning of staging_dir not define
+
+# targets for nativei (non-cross) compile 
 all:git_version
 	rm -f ${NAME}
-	${cc_local}   -o ${NAME}          -I. ${SOURCES} ${FLAGS} -lrt -ggdb -static -O3
+	${cc_local}   -o ${NAME}          -I. ${SOURCES} ${FLAGS} -lrt -ggdb -static -O2
+
+#dynamic link
+dynamic: git_version
+	${cc_local}   -o ${NAME}_$@          -I. ${SOURCES} ${FLAGS} -lrt -O2
+
+#targes for general cross compile
+
+cross:git_version
+	${cc_cross}   -o ${NAME}_cross    -I. ${SOURCES} ${FLAGS} -lrt -O2
+
+cross2:git_version
+	${cc_cross}   -o ${NAME}_cross    -I. ${SOURCES} ${FLAGS} -lrt -static -lgcc_eh -O2
+
+cross3:git_version
+	${cc_cross}   -o ${NAME}_cross    -I. ${SOURCES} ${FLAGS} -lrt -static -O2
+
+#targets only for debug purpose
 fast: git_version
 	rm -f ${NAME}
 	${cc_local}   -o ${NAME}          -I. ${SOURCES} ${FLAGS} -lrt -ggdb
 debug: git_version
 	rm -f ${NAME}
-	${cc_local}   -o ${NAME}          -I. ${SOURCES} ${FLAGS} -lrt -Wformat-nonliteral -D MY_DEBUG 
+	${cc_local}   -o ${NAME}          -I. ${SOURCES} ${FLAGS} -lrt -Wformat-nonliteral -D MY_DEBUG  -ggdb
 debug2: git_version
 	rm -f ${NAME}
-	${cc_local}   -o ${NAME}          -I. ${SOURCES} ${FLAGS} -lrt -Wformat-nonliteral -ggdb
+	${cc_local}   -o ${NAME}          -I. ${SOURCES} ${FLAGS} -lrt -Wformat-nonliteral -ggdb -fsanitize=address

-dynamic: git_version
-	${cc_local}   -o ${NAME}_$@          -I. ${SOURCES} ${FLAGS} -lrt -O3
-
-tmp:git_version
-	${cc_tmp}   -o ${NAME}_$@    -I. ${SOURCES} ${FLAGS} -lrt -lgcc_eh -static -O3
+#targets only for 'make release'

 mips24kc_be: git_version
-	${cc_mips24kc_be}  -o ${NAME}_$@   -I. ${SOURCES} ${FLAGS} -lrt -lgcc_eh -static -O3
+	${cc_mips24kc_be}  -o ${NAME}_$@   -I. ${SOURCES} ${FLAGS} -lrt -lgcc_eh -static -O2
 mips24kc_be_asm_aes: git_version
-	${cc_mips24kc_be}  -o ${NAME}_$@   -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -lgcc_eh -static -O3 lib/aes_acc/asm/mips_be.S
-
+	${cc_mips24kc_be}  -o ${NAME}_$@   -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -lgcc_eh -static -O2 lib/aes_acc/asm/mips_be.S
 mips24kc_le: git_version
-	${cc_mips24kc_le}  -o ${NAME}_$@   -I. ${SOURCES} ${FLAGS} -lrt -lgcc_eh -static -O3
+	${cc_mips24kc_le}  -o ${NAME}_$@   -I. ${SOURCES} ${FLAGS} -lrt -lgcc_eh -static -O2
 mips24kc_le_asm_aes: git_version
-	${cc_mips24kc_le}  -o ${NAME}_$@   -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -lgcc_eh -static -O3 lib/aes_acc/asm/mips.S
-
-#bcm2708:
-#	${cc_bcm2708} -o ${NAME}_bcm2708  -I. ${SOURCES} ${FLAGS} -lrt -static -O3
+	${cc_mips24kc_le}  -o ${NAME}_$@   -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -lgcc_eh -static -O2 lib/aes_acc/asm/mips.S
 amd64:git_version
-	${cc_local}   -o ${NAME}_$@    -I. ${SOURCES} ${FLAGS} -lrt -static -O3
-
-amd64_perf:git_version
-	${cc_local}   -o ${NAME}_$@    -I. ${SOURCES} ${FLAGS} -lrt -static -O0 -fno-omit-frame-pointer -g
-
+	${cc_amd64}   -o ${NAME}_$@    -I. ${SOURCES} ${FLAGS} -lrt -static -O2 -lgcc_eh -ggdb
 amd64_hw_aes:git_version
-	${cc_local}   -o ${NAME}_$@   -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -static -O3 lib/aes_acc/asm/x64.S
+	${cc_amd64}   -o ${NAME}_$@   -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -static -O2 lib/aes_acc/asm/x64.S -lgcc_eh -ggdb
 x86:git_version
-	${cc_local}   -o ${NAME}_$@      -I. ${SOURCES} ${FLAGS} -lrt -static -O3 -m32
+	${cc_x86}   -o ${NAME}_$@      -I. ${SOURCES} ${FLAGS} -lrt -static -O2 -lgcc_eh -ggdb
 x86_asm_aes:git_version
-	${cc_local}   -o ${NAME}_$@    -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -static -O3 -m32 lib/aes_acc/asm/x86.S
+	${cc_x86}   -o ${NAME}_$@    -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -static -O2 lib/aes_acc/asm/x86.S -lgcc_eh -ggdb
 arm:git_version
-	${cc_arm}   -o ${NAME}_$@      -I. ${SOURCES} ${FLAGS} -lrt -static -O3
-
-arm_perf:git_version
-	${cc_arm}   -o ${NAME}_$@      -I. ${SOURCES} ${FLAGS} -lrt -static -mapcs-frame -fno-omit-frame-pointer -g -O0 -lgcc_eh
-
+	${cc_arm}   -o ${NAME}_$@      -I. ${SOURCES} ${FLAGS} -lrt -static -O2 -lgcc_eh
 arm_asm_aes:git_version
-	${cc_arm}   -o ${NAME}_$@    -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -static -O3 lib/aes_acc/asm/arm.S
+	${cc_arm}   -o ${NAME}_$@    -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -static -O2 lib/aes_acc/asm/arm.S -lgcc_eh

-cross:git_version
-	${cc_cross}   -o ${NAME}_cross    -I. ${SOURCES} ${FLAGS} -lrt -O3
-
-cross2:git_version
-	${cc_cross}   -o ${NAME}_cross    -I. ${SOURCES} ${FLAGS} -lrt -static -lgcc_eh -O3   
-
-cross3:git_version
-	${cc_cross}   -o ${NAME}_cross    -I. ${SOURCES} ${FLAGS} -lrt -static -O3
-
-release: ${TARGETS} 
+release: ${TARGETS}
 	cp git_version.h version.txt
 	tar -zcvf ${TAR}

+#targets for multi-platform version (native compile)
+cygwin:git_version
+	${cc_local}   -o ${NAME}_$@          -I. ${SOURCES} pcap_wrapper.cpp ${FLAGS} -lrt -ggdb -static -O2 -D_GNU_SOURCE ${MP}
+
+mingw:git_version
+	${cc_local}   -o ${NAME}_$@         -I. ${SOURCES} pcap_wrapper.cpp ${FLAGS} -ggdb -static -O2 -lws2_32 ${MP}
+
+mingw_wepoll:git_version
+	${cc_local}   -o ${NAME}_$@        -I. ${SOURCES0} pcap_wrapper.cpp ${FLAGS} -ggdb -static -O2 -DNO_LIBEV_EMBED -D_WIN32 -lev -lws2_32 ${MP}
+
+linux:git_version
+	${cc_local}   -o ${NAME}_$@          -I. ${SOURCES} ${PCAP} ${FLAGS} -lrt -ggdb -static -O2 ${MP}
+
+freebsd:git_version
+	${cc_local}   -o ${NAME}_$@        -I. ${SOURCES} ${PCAP} ${FLAGS} -lrt -ggdb -static -libverbs -O2 ${MP}
+
+mac:git_version
+	${cc_local}   -o ${NAME}_$@        -I. ${SOURCES} ${PCAP} ${FLAGS} -ggdb -O2 ${MP}
+
+#targets for multi-platform version (cross compile)
+
+mingw_cross:git_version
+	${cc_mingw_cross}   -o ${NAME}_mp.exe          -I. ${SOURCES} pcap_wrapper.cpp ${FLAGS} -ggdb -static -O2 -lws2_32 ${MP}
+
+mingw_cross_wepoll:git_version
+	${cc_mingw_cross}   -o ${NAME}_mp_wepoll.exe   -I. ${SOURCES0} pcap_wrapper.cpp ${FLAGS} -ggdb -static -O2 -DNO_LIBEV_EMBED -D_WIN32 -lev -lws2_32 ${MP}
+
+mac_cross:git_version
+	${cc_mac_cross}   -o ${NAME}_mp_mac            -I. ${SOURCES} ${PCAP} ${FLAGS} -ggdb -O2 ${MP}
+
+release_mp:${TARGETS_MP}
+	cp git_version.h version.txt
+	tar -zcvf ${NAME}_mp_binaries.tar.gz ${NAME}_mp.exe ${NAME}_mp_wepoll.exe ${NAME}_mp_mac version.txt
+
+
 clean:	
 	rm -f ${TAR}
-	rm -f udp2raw udp2raw_cross udp2raw_cmake udp2raw_dynamic
+	rm -f ${NAME} ${NAME}_cross ${NAME}.exe ${NAME}_wepoll.exe ${NAME}_mac
+	rm -f ${NAME}_mp_binaries.tar.gz ${NAME}_mp.exe ${NAME}_mp_wepoll.exe ${NAME}_mp_mac
 	rm -f git_version.h

 git_version:
 	    echo "const char *gitversion = \"$(shell git rev-parse HEAD)\";" > git_version.h
-	
--- a/misc.cpp
+++ b/misc.cpp
--- a/misc.h
+++ b/misc.h
@@ -8,7 +8,6 @@
 #ifndef MISC_H_
 #define MISC_H_

-
 #include "common.h"
 #include "log.h"
 #include "network.h"
@@ -26,128 +25,131 @@ extern int enable_dns_resolve;

 extern int ttl_value;

+const u32_t max_handshake_conn_num = 10000;
+const u32_t max_ready_conn_num = 1000;
+const u32_t anti_replay_window_size = 4000;
+const int max_conv_num = 10000;

-const u32_t max_handshake_conn_num=10000;
-const u32_t max_ready_conn_num=1000;
-const u32_t anti_replay_window_size=4000;
-const int max_conv_num=10000;
+const u32_t client_handshake_timeout = 5000;  // unit ms
+const u32_t client_retry_interval = 1000;     // ms

-const u32_t client_handshake_timeout=5000;//unit ms
-const u32_t client_retry_interval=1000;//ms
+const u32_t server_handshake_timeout = client_handshake_timeout + 5000;  // this should be longer than clients. client retry initially ,server retry passtively

-const u32_t server_handshake_timeout=client_handshake_timeout+5000;// this should be longer than clients. client retry initially ,server retry passtively
+const int conv_clear_ratio = 30;  // conv grabage collecter check 1/30 of all conv one time
+const int conn_clear_ratio = 50;
+const int conv_clear_min = 1;
+const int conn_clear_min = 1;

-const int conv_clear_ratio=30;  //conv grabage collecter check 1/30 of all conv one time
-const int conn_clear_ratio=50;
-const int conv_clear_min=1;
-const int conn_clear_min=1;
+const u32_t conv_clear_interval = 1000;  // ms
+const u32_t conn_clear_interval = 1000;  // ms

-const u32_t conv_clear_interval=1000;//ms
-const u32_t conn_clear_interval=1000;//ms
+const i32_t max_fail_time = 0;  // disable

+const u32_t heartbeat_interval = 600;  // ms

-const i32_t max_fail_time=0;//disable
+const u32_t timer_interval = 400;  // ms. this should be smaller than heartbeat_interval and retry interval;

-const u32_t heartbeat_interval=600;//ms
+const uint32_t conv_timeout = 180000;  // ms. 120 second
+// const u32_t conv_timeout=30000; //for test

-const u32_t timer_interval=400;//ms. this should be smaller than heartbeat_interval and retry interval;
+const u32_t client_conn_timeout = 10000;                              // ms.
+const u32_t client_conn_uplink_timeout = client_conn_timeout + 2000;  // ms

-const uint32_t conv_timeout=180000; //ms. 120 second
-//const u32_t conv_timeout=30000; //for test
+const uint32_t server_conn_timeout = conv_timeout + 60000;  // ms. this should be 60s+ longer than conv_timeout,so that conv_manager can destruct convs gradually,to avoid latency glicth
+// const u32_t server_conn_timeout=conv_timeout+10000;//for test

-const u32_t client_conn_timeout=10000;//ms.
-const u32_t client_conn_uplink_timeout=client_conn_timeout+2000;//ms
+const u32_t iptables_rule_keep_interval = 20;  // unit: second;

-const uint32_t server_conn_timeout=conv_timeout+60000;//ms. this should be 60s+ longer than conv_timeout,so that conv_manager can destruct convs gradually,to avoid latency glicth
-//const u32_t server_conn_timeout=conv_timeout+10000;//for test
+enum server_current_state_t { server_idle = 0,
+                              server_handshake1,
+                              server_ready };  // server state machine
+enum client_current_state_t { client_idle = 0,
+                              client_tcp_handshake,
+                              client_handshake1,
+                              client_handshake2,
+                              client_ready,
+                              client_tcp_handshake_dummy };  // client state machine

-const u32_t iptables_rule_keep_interval=20;//unit: second;
+enum raw_mode_t { mode_faketcp = 0,
+                  mode_udp,
+                  mode_icmp,
+                  mode_end };
+enum program_mode_t { unset_mode = 0,
+                      client_mode,
+                      server_mode };

-enum server_current_state_t {server_idle=0,server_handshake1,server_ready};  //server state machine
-enum client_current_state_t {client_idle=0,client_tcp_handshake,client_handshake1,client_handshake2,client_ready,client_tcp_handshake_dummy};//client state machine
-
-enum raw_mode_t{mode_faketcp=0,mode_udp,mode_icmp,mode_end};
-enum program_mode_t {unset_mode=0,client_mode,server_mode};
-
-union current_state_t
-{
-	server_current_state_t server_current_state;
-	client_current_state_t client_current_state;
+union current_state_t {
+    server_current_state_t server_current_state;
+    client_current_state_t client_current_state;
 };

-//extern char remote_address[max_address_len];
-//extern char local_ip[100], remote_ip[100],source_ip[100];//local_ip is for -l option,remote_ip for -r option,source for --source-ip
-//extern u32_t local_ip_uint32,remote_ip_uint32,source_ip_uint32;//convert from last line.
-//extern int local_port , remote_port,source_port;//similiar to local_ip  remote_ip,buf for port.source_port=0 indicates --source-port is not enabled
+// extern char remote_address[max_address_len];
+// extern char local_ip[100], remote_ip[100],source_ip[100];//local_ip is for -l option,remote_ip for -r option,source for --source-ip
+// extern u32_t local_ip_uint32,remote_ip_uint32,source_ip_uint32;//convert from last line.
+// extern int local_port , remote_port,source_port;//similiar to local_ip  remote_ip,buf for port.source_port=0 indicates --source-port is not enabled

-extern address_t local_addr,remote_addr,source_addr;
+extern address_t local_addr, remote_addr, source_addr;

 extern my_ip_t bind_addr;

 extern int bind_addr_used;
-extern int force_source_ip; //if --source-ip is enabled
+extern int force_source_ip;  // if --source-ip is enabled
 extern int force_source_port;
 extern int source_port;

-extern my_id_t const_id;//an id used for connection recovery,its generated randomly,it never change since its generated
+extern my_id_t const_id;  // an id used for connection recovery,its generated randomly,it never change since its generated

-extern int udp_fd;  //for client only. client use this fd to listen and handle udp connection
-extern int bind_fd; //bind only,never send or recv.  its just a dummy fd for bind,so that other program wont occupy the same port
-extern int epollfd; //fd for epoll
-extern int timer_fd;   //the general timer fd for client and server.for server this is not the only timer find,every connection has a timer fd.
-extern int fail_time_counter;//determine if the max_fail_time is reached
-extern int epoll_trigger_counter;//for debug only
-extern int debug_flag;//for debug only
+extern int udp_fd;                 // for client only. client use this fd to listen and handle udp connection
+extern int bind_fd;                // bind only,never send or recv.  its just a dummy fd for bind,so that other program wont occupy the same port
+extern int epollfd;                // fd for epoll
+extern int timer_fd;               // the general timer fd for client and server.for server this is not the only timer find,every connection has a timer fd.
+extern int fail_time_counter;      // determine if the max_fail_time is reached
+extern int epoll_trigger_counter;  // for debug only
+extern int debug_flag;             // for debug only

-
-extern int simple_rule;  //deprecated.
-extern int keep_rule; //whether to monitor the iptables rule periodly,re-add if losted
-extern int auto_add_iptables_rule;//if -a is set
-extern int generate_iptables_rule;//if -g is set
-extern int generate_iptables_rule_add;// if --gen-add is set
+extern int simple_rule;                 // deprecated.
+extern int keep_rule;                   // whether to monitor the iptables rule periodly,re-add if losted
+extern int auto_add_iptables_rule;      // if -a is set
+extern int generate_iptables_rule;      // if -g is set
+extern int generate_iptables_rule_add;  // if --gen-add is set
 extern int retry_on_error;
-const  int retry_on_error_interval=10;
+const int retry_on_error_interval = 10;

-extern int debug_resend; // debug only
+extern int debug_resend;  // debug only

-extern char key_string[1000];// -k option
+extern char key_string[1000];  // -k option
 extern char fifo_file[1000];

-
 extern raw_mode_t raw_mode;
 extern u32_t raw_ip_version;

 extern program_mode_t program_mode;
-extern unordered_map<int, const char*> raw_mode_tostring ;
+extern unordered_map<int, const char *> raw_mode_tostring;

 extern int about_to_exit;

 extern int socket_buf_size;

-
 extern pthread_t keep_thread;
 extern int keep_thread_running;

-
 int process_lower_level_arg();
 void print_help();
 void iptables_rule();
-void pre_process_arg(int argc, char *argv[]);//mainly for load conf file;
+void pre_process_arg(int argc, char *argv[]);  // mainly for load conf file;
 int unit_test();
-int set_timer(int epollfd,int &timer_fd);
-int set_timer_server(int epollfd,int &timer_fd,fd64_t &fd64);
+int set_timer(int epollfd, int &timer_fd);
+int set_timer_server(int epollfd, int &timer_fd, fd64_t &fd64);
 int handle_lower_level(raw_info_t &raw_info);

 int add_iptables_rule(const char *);

 int clear_iptables_rule();

-int iptables_gen_add(const char * s,u32_t const_id);
-int iptables_rule_init(const char * s,u32_t const_id,int keep);
+int iptables_gen_add(const char *s, u32_t const_id);
+int iptables_rule_init(const char *s, u32_t const_id, int keep);
 int keep_iptables_rule();

-
-
-void  signal_handler(int sig);
+void signal_handler(int sig);

 #endif /* MISC_H_ */
--- a/my_ev.h
+++ b/my_ev.h
@@ -2,4 +2,3 @@

 #include "my_ev_common.h"
 #include "ev.h"
-
--- a/my_ev_common.h
+++ b/my_ev_common.h
@@ -1,6 +1,8 @@

 #define EV_STANDALONE 1
-#define EV_COMMON  void *data; unsigned long long u64;
+#define EV_COMMON \
+    void *data;   \
+    unsigned long long u64;
 #define EV_COMPAT3 0

 //#include <wepoll.h>
@@ -8,11 +10,10 @@
 //#define EV_USE_SELECT 1
 //#define EV_SELECT_IS_WINSOCKET 1

-# define EV_FD_TO_WIN32_HANDLE(fd) (fd)
-# define EV_WIN32_HANDLE_TO_FD(handle) (handle)
-# define EV_WIN32_CLOSE_FD(fd) closesocket (fd)
-# define FD_SETSIZE 4096
+#define EV_FD_TO_WIN32_HANDLE(fd) (fd)
+#define EV_WIN32_HANDLE_TO_FD(handle) (handle)
+#define EV_WIN32_CLOSE_FD(fd) closesocket(fd)
+#define FD_SETSIZE 4096

 #endif
 //#define EV_VERIFY 2
-
--- a/network.cpp
+++ b/network.cpp
--- a/network.h
+++ b/network.h
@@ -14,7 +14,7 @@ extern int use_tcp_dummy_socket;
 extern int seq_mode;
 extern int max_seq_mode;
 extern int filter_port;
-//extern u32_t bind_address_uint32;
+// extern u32_t bind_address_uint32;
 extern int disable_bpf_filter;

 extern int lower_level;
@@ -30,15 +30,39 @@ extern int ifindex;
 extern char g_packet_buf[huge_buf_len];
 extern int g_packet_buf_len;
 extern int g_packet_buf_cnt;
+#ifdef UDP2RAW_MP
+extern queue_t my_queue;

-struct my_iphdr
-  {
+extern ev_async async_watcher;
+extern struct ev_loop *g_default_loop;
+
+extern pthread_mutex_t queue_mutex;
+extern int use_pcap_mutex;
+
+extern int pcap_cnt;
+
+extern int pcap_link_header_len;
+
+extern int send_with_pcap;
+extern int pcap_header_captured;
+extern int pcap_header_buf[buf_len];
+
+struct icmphdr {
+    uint8_t type;
+    uint8_t code;
+    uint16_t check_sum;
+    uint16_t id;
+    uint16_t seq;
+};
+#endif
+
+struct my_iphdr {
 #ifdef UDP2RAW_LITTLE_ENDIAN
-    unsigned char ihl:4;
-    unsigned char version:4;
+    unsigned char ihl : 4;
+    unsigned char version : 4;
 #else
-    unsigned char version:4;
-    unsigned char ihl:4;
+    unsigned char version : 4;
+    unsigned char ihl : 4;
 #endif
    u_int8_t tos;
    u_int16_t tot_len;
@@ -50,105 +74,98 @@ struct my_iphdr
    u_int32_t saddr;
    u_int32_t daddr;
    /*The options start here. */
-  };
-
-
-struct my_udphdr
-{
-  /*__extension__*/ union
-  {
-    struct
-    {
-      u_int16_t uh_sport;		/* source port */
-      u_int16_t uh_dport;		/* destination port */
-      u_int16_t uh_ulen;		/* udp length */
-      u_int16_t uh_sum;		/* udp checksum */
-    };
-    struct
-    {
-      u_int16_t source;
-      u_int16_t dest;
-      u_int16_t len;
-      u_int16_t check;
-    };
-  };
 };

-
-struct my_tcphdr
-  {
-    /*__extension__*/ union
-    {
-      struct
-      {
-	u_int16_t th_sport;		/* source port */
-	u_int16_t th_dport;		/* destination port */
-	u_int32_t th_seq;		/* sequence number */
-	u_int32_t th_ack;		/* acknowledgement number */
-# ifdef UDP2RAW_LITTLE_ENDIAN
-	u_int8_t th_x2:4;		/* (unused) */
-	u_int8_t tc_off:4;		/* data offset */
-# else
-	u_int8_t th_off:4;		/* data offset */
-	u_int8_t th_x2:4;		/* (unused) */
-# endif
-	u_int8_t th_flags;
-# define TH_FIN	0x01
-# define TH_SYN	0x02
-# define TH_RST	0x04
-# define TH_PUSH	0x08
-# define TH_ACK	0x10
-# define TH_URG	0x20
-	u_int16_t th_win;		/* window */
-	u_int16_t th_sum;		/* checksum */
-	u_int16_t th_urp;		/* urgent pointer */
-      };
-      struct
-      {
-	u_int16_t source;
-	u_int16_t dest;
-	u_int32_t seq;
-	u_int32_t ack_seq;
-# ifdef UDP2RAW_LITTLE_ENDIAN
-	u_int16_t res1:4;
-	u_int16_t doff:4;
-	u_int16_t fin:1;
-	u_int16_t syn:1;
-	u_int16_t rst:1;
-	u_int16_t psh:1;
-	u_int16_t ack:1;
-	u_int16_t urg:1;
-	u_int16_t res2:2;
-# else
-	u_int16_t doff:4;
-	u_int16_t res1:4;
-	u_int16_t res2:2;
-	u_int16_t urg:1;
-	u_int16_t ack:1;
-	u_int16_t psh:1;
-	u_int16_t rst:1;
-	u_int16_t syn:1;
-	u_int16_t fin:1;
-# endif
-	u_int16_t window;
-	u_int16_t check;
-	u_int16_t urg_ptr;
-      };
+struct my_udphdr {
+    /*__extension__*/ union {
+        struct
+        {
+            u_int16_t uh_sport; /* source port */
+            u_int16_t uh_dport; /* destination port */
+            u_int16_t uh_ulen;  /* udp length */
+            u_int16_t uh_sum;   /* udp checksum */
+        };
+        struct
+        {
+            u_int16_t source;
+            u_int16_t dest;
+            u_int16_t len;
+            u_int16_t check;
+        };
    };
 };

-struct my_ip6hdr
-  {
-# ifdef UDP2RAW_LITTLE_ENDIAN
-    uint8_t traffic_class_high:4;
-    uint8_t version:4;
-    uint8_t flow_label_high:4;
-    uint8_t traffic_class_low:4;
+struct my_tcphdr {
+    /*__extension__*/ union {
+        struct
+        {
+            u_int16_t th_sport; /* source port */
+            u_int16_t th_dport; /* destination port */
+            u_int32_t th_seq;   /* sequence number */
+            u_int32_t th_ack;   /* acknowledgement number */
+#ifdef UDP2RAW_LITTLE_ENDIAN
+            u_int8_t th_x2 : 4;  /* (unused) */
+            u_int8_t tc_off : 4; /* data offset */
 #else
-    uint8_t version:4;
-    uint8_t traffic_class_high:4;
-    uint8_t traffic_class_low:4;
-    uint8_t flow_label_high:4;
+            u_int8_t th_off : 4; /* data offset */
+            u_int8_t th_x2 : 4;  /* (unused) */
+#endif
+            u_int8_t th_flags;
+#define TH_FIN 0x01
+#define TH_SYN 0x02
+#define TH_RST 0x04
+#define TH_PUSH 0x08
+#define TH_ACK 0x10
+#define TH_URG 0x20
+            u_int16_t th_win; /* window */
+            u_int16_t th_sum; /* checksum */
+            u_int16_t th_urp; /* urgent pointer */
+        };
+        struct
+        {
+            u_int16_t source;
+            u_int16_t dest;
+            u_int32_t seq;
+            u_int32_t ack_seq;
+#ifdef UDP2RAW_LITTLE_ENDIAN
+            u_int16_t res1 : 4;
+            u_int16_t doff : 4;
+            u_int16_t fin : 1;
+            u_int16_t syn : 1;
+            u_int16_t rst : 1;
+            u_int16_t psh : 1;
+            u_int16_t ack : 1;
+            u_int16_t urg : 1;
+            u_int16_t res2 : 2;
+#else
+            u_int16_t doff : 4;
+            u_int16_t res1 : 4;
+            u_int16_t res2 : 2;
+            u_int16_t urg : 1;
+            u_int16_t ack : 1;
+            u_int16_t psh : 1;
+            u_int16_t rst : 1;
+            u_int16_t syn : 1;
+            u_int16_t fin : 1;
+#endif
+            u_int16_t window;
+            u_int16_t check;
+            u_int16_t urg_ptr;
+        };
+    };
+};
+
+struct my_ip6hdr {
+#ifdef UDP2RAW_LITTLE_ENDIAN
+    uint8_t traffic_class_high : 4;
+    uint8_t version : 4;
+    uint8_t flow_label_high : 4;
+    uint8_t traffic_class_low : 4;
+#else
+    uint8_t version : 4;
+    uint8_t traffic_class_high : 4;
+    uint8_t traffic_class_low : 4;
+    uint8_t flow_label_high : 4;
 #endif
    u_int16_t flow_label_low;
    u_int16_t payload_len;
@@ -157,15 +174,14 @@ struct my_ip6hdr

    struct in6_addr src;
    struct in6_addr dst;
-  };
+};

-struct my_icmphdr
-{
-	uint8_t type;
-	uint8_t code;
-	uint16_t check_sum;
-	uint16_t id;
-	uint16_t seq;
+struct my_icmphdr {
+    uint8_t type;
+    uint8_t code;
+    uint16_t check_sum;
+    uint16_t id;
+    uint16_t seq;
 };

 struct pseudo_header {
@@ -185,55 +201,53 @@ struct pseudo_header6 {
    u_int8_t next_header;
 };

-struct packet_info_t  //todo change this to union
+struct packet_info_t  // todo change this to union
 {
-	uint8_t protocol;
+    uint8_t protocol;

+    // u32_t src_ip;
+    // u32_t dst_ip;
+    my_ip_t new_src_ip;
+    my_ip_t new_dst_ip;

-	//u32_t src_ip;
-	//u32_t dst_ip;
-	my_ip_t new_src_ip;
-	my_ip_t new_dst_ip;
+    uint16_t src_port;
+    uint16_t dst_port;

-	uint16_t src_port;
-	uint16_t dst_port;
+    // tcp_part:
+    bool syn, ack, psh, rst;

-	//tcp_part:
-	bool syn,ack,psh,rst;
+    u32_t seq, ack_seq;

-	u32_t seq,ack_seq;
+    u32_t ack_seq_counter;

-	u32_t ack_seq_counter;
+    u32_t ts, ts_ack;

-	u32_t ts,ts_ack;
+    uint16_t my_icmp_seq;

+    bool has_ts;

-	uint16_t my_icmp_seq;
+#ifdef UDP2RAW_LINUX
+    sockaddr_ll addr_ll;
+#endif

-	bool has_ts;
+    i32_t data_len;

-	sockaddr_ll addr_ll;
-
-	i32_t data_len;
-
-	packet_info_t();
+    packet_info_t();
 };

-struct raw_info_t
-{
-	packet_info_t send_info;
-	packet_info_t recv_info;
-	//int last_send_len;
-	//int last_recv_len;
-	bool peek=0;
-	//bool csum=1;
-	u32_t reserved_send_seq;
-	//uint32_t first_seq,first_ack_seq;
-	int rst_received=0;
-	bool disabled=0;
-
-};//g_raw_info;
+struct raw_info_t {
+    packet_info_t send_info;
+    packet_info_t recv_info;
+    // int last_send_len;
+    // int last_recv_len;
+    bool peek = 0;
+    // bool csum=1;
+    u32_t reserved_send_seq;
+    // uint32_t first_seq,first_ack_seq;
+    int rst_received = 0;
+    bool disabled = 0;

+};  // g_raw_info;

 int init_raw_socket();

@@ -241,51 +255,56 @@ void init_filter(int port);

 void remove_filter();

-int init_ifindex(const char * if_name,int fd,int &index);
+#ifdef UDP2RAW_LINUX
+int init_ifindex(const char *if_name, int fd, int &index);
+#endif

-int find_lower_level_info(u32_t ip,u32_t &dest_ip,string &if_name,string &hw);
+#ifdef UDP2RAW_MP
+int init_ifindex(const char *if_name, int &index);
+#endif

-int get_src_adress(u32_t &ip,u32_t remote_ip_uint32,int remote_port);  //a trick to get src adress for a dest adress,so that we can use the src address in raw socket as source ip
-int get_src_adress2(address_t &output_addr,address_t remote_addr);
+int find_lower_level_info(u32_t ip, u32_t &dest_ip, string &if_name, string &hw);

-int try_to_list_and_bind(int & bind_fd,u32_t local_ip_uint32,int port);  //try to bind to a port,may fail.
-int try_to_list_and_bind2(int &fd,address_t address);
+int get_src_adress(u32_t &ip, u32_t remote_ip_uint32, int remote_port);  // a trick to get src adress for a dest adress,so that we can use the src address in raw socket as source ip
+int get_src_adress2(address_t &output_addr, address_t remote_addr);

-int client_bind_to_a_new_port(int & bind_fd,u32_t local_ip_uint32);//find a free port and bind to it.
-int client_bind_to_a_new_port2(int &fd,const address_t& address);
+int try_to_list_and_bind(int &bind_fd, u32_t local_ip_uint32, int port);  // try to bind to a port,may fail.
+int try_to_list_and_bind2(int &fd, address_t address);
+
+int client_bind_to_a_new_port(int &bind_fd, u32_t local_ip_uint32);  // find a free port and bind to it.
+int client_bind_to_a_new_port2(int &fd, const address_t &address);

 int discard_raw_packet();
 int pre_recv_raw_packet();

-int send_raw_ip(raw_info_t &raw_info,const char * payload,int payloadlen);
+int send_raw_ip(raw_info_t &raw_info, const char *payload, int payloadlen);

 int peek_raw(raw_info_t &peek_info);

-int recv_raw_ip(raw_info_t &raw_info,char * &payload,int &payloadlen);
+int recv_raw_ip(raw_info_t &raw_info, char *&payload, int &payloadlen);

-int send_raw_icmp(raw_info_t &raw_info, const char * payload, int payloadlen);
+int send_raw_icmp(raw_info_t &raw_info, const char *payload, int payloadlen);

-int send_raw_udp(raw_info_t &raw_info, const char * payload, int payloadlen);
+int send_raw_udp(raw_info_t &raw_info, const char *payload, int payloadlen);

-int send_raw_tcp(raw_info_t &raw_info,const char * payload, int payloadlen);
+int send_raw_tcp(raw_info_t &raw_info, const char *payload, int payloadlen);

 int recv_raw_icmp(raw_info_t &raw_info, char *&payload, int &payloadlen);

 int recv_raw_udp(raw_info_t &raw_info, char *&payload, int &payloadlen);

-int recv_raw_tcp(raw_info_t &raw_info,char * &payload,int &payloadlen);
+int recv_raw_tcp(raw_info_t &raw_info, char *&payload, int &payloadlen);

-//int send_raw(raw_info_t &raw_info,const char * payload,int payloadlen);
+// int send_raw(raw_info_t &raw_info,const char * payload,int payloadlen);

-//int recv_raw(raw_info_t &raw_info,char * &payload,int &payloadlen);
+// int recv_raw(raw_info_t &raw_info,char * &payload,int &payloadlen);

-int send_raw0(raw_info_t &raw_info,const char * payload,int payloadlen);
+int send_raw0(raw_info_t &raw_info, const char *payload, int payloadlen);

-int recv_raw0(raw_info_t &raw_info,char * &payload,int &payloadlen);
+int recv_raw0(raw_info_t &raw_info, char *&payload, int &payloadlen);

 int after_send_raw0(raw_info_t &raw_info);

 int after_recv_raw0(raw_info_t &raw_info);

-
 #endif /* NETWORK_H_ */
--- a/pcap_wrapper.cpp
+++ b/pcap_wrapper.cpp
@@ -0,0 +1,119 @@
+#include <windows.h>
+#include <pcap_wrapper.h>
+#include <assert.h>
+#include <stdio.h>
+int (*pcap_loop)(pcap_t *, int, pcap_handler, u_char *);
+int (*pcap_breakloop)(pcap_t *);
+
+pcap_t *(*pcap_create)(const char *, char *);
+
+int (*pcap_set_snaplen)(pcap_t *, int) = 0;
+int (*pcap_set_promisc)(pcap_t *, int) = 0;
+int (*pcap_can_set_rfmon)(pcap_t *) = 0;
+int (*pcap_set_rfmon)(pcap_t *, int) = 0;
+int (*pcap_set_timeout)(pcap_t *, int) = 0;
+int (*pcap_set_buffer_size)(pcap_t *, int) = 0;
+int (*pcap_activate)(pcap_t *) = 0;
+
+int (*pcap_setfilter)(pcap_t *, struct bpf_program *) = 0;
+int (*pcap_setdirection)(pcap_t *, pcap_direction_t) = 0;
+
+int (*pcap_datalink)(pcap_t *) = 0;
+
+void (*pcap_freecode)(struct bpf_program *) = 0;
+
+int (*pcap_compile)(pcap_t *, struct bpf_program *, const char *, int,
+                    bpf_u_int32) = 0;
+
+char *(*pcap_geterr)(pcap_t *) = 0;
+int (*pcap_sendpacket)(pcap_t *, const u_char *, int) = 0;
+
+char *(*pcap_lookupdev)(char *) = 0;
+
+int (*pcap_findalldevs)(pcap_if_t **, char *) = 0;
+
+struct init_pcap_t {
+    init_pcap_t() {
+        init_pcap();
+    }
+
+} do_it;
+
+static void init_npcap_dll_path() {
+    BOOL(WINAPI * SetDllDirectory)
+    (LPCTSTR);
+    char sysdir_name[512];
+    int len;
+
+    SetDllDirectory = (BOOL(WINAPI *)(LPCTSTR))GetProcAddress(GetModuleHandle("kernel32.dll"), "SetDllDirectoryA");
+    if (SetDllDirectory == NULL) {
+        printf("Error in SetDllDirectory\n");
+    } else {
+        len = GetSystemDirectory(sysdir_name, 480);  //	be safe
+        if (!len)
+            printf("Error in GetSystemDirectory (%d)\n", (int)GetLastError());
+        strcat(sysdir_name, "\\Npcap");
+        if (SetDllDirectory(sysdir_name) == 0)
+            printf("Error in SetDllDirectory(\"System32\\Npcap\")\n");
+    }
+}
+
+#define EXPORT_FUN(XXX)                                     \
+    do {                                                    \
+        XXX = (__typeof__(XXX))GetProcAddress(wpcap, #XXX); \
+    } while (0)
+int init_pcap() {
+    HMODULE wpcap = LoadLibrary("wpcap.dll");
+    if (wpcap != 0) {
+        printf("using system32/wpcap.dll\n");
+    } else {
+        init_npcap_dll_path();
+        // SetDllDirectory("C:\\Windows\\System32\\Npcap\\");
+        wpcap = LoadLibrary("wpcap.dll");
+        if (wpcap != 0)
+            printf("using system32/npcap/wpcap.dll\n");
+    }
+    if (wpcap == 0) {
+        printf("cant not open wpcap.dll, make sure winpcap/npcap is installed\n");
+        exit(-1);
+    }
+    assert(wpcap != 0);
+
+    EXPORT_FUN(pcap_loop);
+    EXPORT_FUN(pcap_breakloop);
+    EXPORT_FUN(pcap_create);
+    EXPORT_FUN(pcap_set_snaplen);
+    EXPORT_FUN(pcap_set_promisc);
+    EXPORT_FUN(pcap_set_timeout);
+    EXPORT_FUN(pcap_activate);
+    EXPORT_FUN(pcap_setfilter);
+    EXPORT_FUN(pcap_setdirection);
+    EXPORT_FUN(pcap_datalink);
+    EXPORT_FUN(pcap_freecode);
+    EXPORT_FUN(pcap_compile);
+    EXPORT_FUN(pcap_geterr);
+    EXPORT_FUN(pcap_sendpacket);
+    EXPORT_FUN(pcap_lookupdev);
+    EXPORT_FUN(pcap_findalldevs);
+    /*
+    pcap_loop = (__typeof__(pcap_loop))GetProcAddress(wpcap, "pcap_loop");
+    pcap_create = (__typeof__(pcap_create))GetProcAddress(wpcap, "pcap_create");
+    pcap_set_snaplen = (__typeof__(pcap_set_snaplen))GetProcAddress(wpcap, "pcap_set_snaplen");
+    pcap_set_promisc = (__typeof__(pcap_set_promisc))GetProcAddress(wpcap, "pcap_set_promisc");
+    pcap_set_timeout = (__typeof__(pcap_set_timeout))GetProcAddress(wpcap, "pcap_set_timeout");
+    pcap_activate = (__typeof__(pcap_activate))GetProcAddress(wpcap, "pcap_activate");
+    pcap_setfilter = (__typeof__(pcap_setfilter))GetProcAddress(wpcap, "pcap_setfilter");
+    pcap_setdirection = (__typeof__(pcap_setdirection))GetProcAddress(wpcap, "pcap_setdirection");
+    pcap_datalink = (__typeof__(pcap_datalink))GetProcAddress(wpcap, "pcap_datalink");
+    pcap_freecode = (__typeof__(pcap_freecode))GetProcAddress(wpcap, "pcap_freecode");
+    pcap_compile = (__typeof__(pcap_compile))GetProcAddress(wpcap, "pcap_compile");
+    pcap_geterr = (__typeof__(pcap_geterr))GetProcAddress(wpcap, "pcap_geterr");
+    pcap_sendpacket = (__typeof__(pcap_sendpacket))GetProcAddress(wpcap, "pcap_sendpacket");
+    pcap_lookupdev = (__typeof__(pcap_lookupdev))GetProcAddress(wpcap, "pcap_lookupdev");
+    pcap_findalldevs = (__typeof__(pcap_findalldevs))GetProcAddress(wpcap, "pcap_findalldevs");
+    //pcap_loop = (__typeof__(pcap_loop))GetProcAddress(wpcap, "pcap_loop");
+    //pcap_loop = (__typeof__(pcap_loop))GetProcAddress(wpcap, "pcap_loop");
+    //pcap_loop = (__typeof__(pcap_loop))GetProcAddress(wpcap, "pcap_loop");
+    */
+    return 0;
+}
--- a/pcap_wrapper.h
+++ b/pcap_wrapper.h
@@ -0,0 +1,117 @@
+#pragma once
+
+//#ifdef __cplusplus
+// extern "C" {
+//#endif
+
+//#include <sys/time.h>
+//#include <stdint.h>
+
+struct bpf_program {
+    char a[4096];
+};
+
+struct pcap_t {
+    char a[4096];
+};
+
+typedef unsigned int bpf_u_int32;
+
+typedef struct my_timeval {
+    int tv_sec;
+    int tv_usec;
+} my_timeval;
+
+struct pcap_pkthdr {
+    struct my_timeval ts; /* time stamp */
+    bpf_u_int32 caplen;   /* length of portion present */
+    bpf_u_int32 len;      /* length this packet (off wire) */
+};
+
+typedef enum {
+    PCAP_D_INOUT = 0,
+    PCAP_D_IN,
+    PCAP_D_OUT
+} pcap_direction_t;
+
+struct pcap_addr {
+    struct pcap_addr *next;
+    struct sockaddr *addr;      /* address */
+    struct sockaddr *netmask;   /* netmask for that address */
+    struct sockaddr *broadaddr; /* broadcast address for that address */
+    struct sockaddr *dstaddr;   /* P2P destination address for that address */
+};
+
+struct pcap_if {
+    struct pcap_if *next;
+    char *name;        /* name to hand to "pcap_open_live()" */
+    char *description; /* textual description of interface, or NULL */
+    struct pcap_addr *addresses;
+    bpf_u_int32 flags; /* PCAP_IF_ interface flags */
+};
+
+typedef struct pcap_if pcap_if_t;
+typedef struct pcap_addr pcap_addr_t;
+
+typedef unsigned char u_char;
+
+#define PCAP_ERRBUF_SIZE 256
+
+#define DLT_NULL 0    /* BSD loopback encapsulation */
+#define DLT_EN10MB 1  /* Ethernet (10Mb) */
+#define DLT_EN3MB 2   /* Experimental Ethernet (3Mb) */
+#define DLT_AX25 3    /* Amateur Radio AX.25 */
+#define DLT_PRONET 4  /* Proteon ProNET Token Ring */
+#define DLT_CHAOS 5   /* Chaos */
+#define DLT_IEEE802 6 /* 802.5 Token Ring */
+#define DLT_ARCNET 7  /* ARCNET, with BSD-style header */
+#define DLT_SLIP 8    /* Serial Line IP */
+#define DLT_PPP 9     /* Point-to-point Protocol */
+#define DLT_FDDI 10   /* FDDI */
+#define DLT_LINUX_SLL 113
+
+#define PCAP_NETMASK_UNKNOWN 0xffffffff
+
+typedef void (*pcap_handler)(u_char *, const struct pcap_pkthdr *,
+                             const u_char *);
+
+extern int (*pcap_loop)(pcap_t *, int, pcap_handler, u_char *);
+
+extern int (*pcap_breakloop)(pcap_t *);
+
+extern pcap_t *(*pcap_create)(const char *, char *);
+
+extern int (*pcap_set_snaplen)(pcap_t *, int);
+extern int (*pcap_set_promisc)(pcap_t *, int);
+extern int (*pcap_can_set_rfmon)(pcap_t *);
+extern int (*pcap_set_rfmon)(pcap_t *, int);
+extern int (*pcap_set_timeout)(pcap_t *, int);
+extern int (*pcap_set_buffer_size)(pcap_t *, int);
+extern int (*pcap_activate)(pcap_t *);
+
+extern int (*pcap_setfilter)(pcap_t *, struct bpf_program *);
+extern int (*pcap_setdirection)(pcap_t *, pcap_direction_t);
+
+extern int (*pcap_datalink)(pcap_t *);
+
+extern void (*pcap_freecode)(struct bpf_program *);
+
+extern int (*pcap_compile)(pcap_t *, struct bpf_program *, const char *, int,
+                           bpf_u_int32);
+
+extern char *(*pcap_geterr)(pcap_t *);
+extern int (*pcap_sendpacket)(pcap_t *, const u_char *, int);
+
+extern char *(*pcap_lookupdev)(char *);
+
+extern int (*pcap_findalldevs)(pcap_if_t **, char *);
+
+inline int pcap_set_immediate_mode(pcap_t *, int) {
+    return 0;
+}
+
+//#ifdef __cplusplus
+//}
+//#endif
+
+int init_pcap();
--- a/server.cpp
+++ b/server.cpp
Author	SHA1	Message	Date
Eden Johnson	1c2c9f47f7	Merge `ebe13101c0` into `bc8bd8c2f8`	2023-09-21 15:06:21 -06:00
Yancey Wang	bc8bd8c2f8	Merge pull request #475 from gek64/unified Fix compile errors on FreeBSD/pfSense/OPNsense	2023-09-21 16:35:45 -04:00
gek64	ca16c3a5e6	Merge branch 'wangyu-:unified' into unified	2023-07-27 21:10:28 +08:00
Yancey Wang	7abe19c7d9	Merge pull request #482 from wangyu-/revert-455-unified Revert "fix CMakeLists.txt"	2023-07-22 17:31:10 -04:00
Yancey Wang	f3f528e866	Revert "fix CMakeLists.txt"	2023-07-22 17:30:56 -04:00
Yancey Wang	ec6fad552b	Merge pull request #455 from HiGarfield/unified fix CMakeLists.txt	2023-07-22 17:09:53 -04:00
yancey	87b878a09e	fix stack-use-after-scope reported by sanitizer	2023-07-22 14:31:17 -04:00
yancey	e66eddd1d5	fix mem access problem reported by sanitizer	2023-07-22 14:00:03 -04:00
gek64	ec416515f3	Fix compile errors on freebsd	2023-06-14 16:26:10 +08:00
Yancey Wang	d12e540830	Update CMakeLists.txt	2023-06-04 21:44:44 -04:00
Yancey Wang	e7eecc8ef2	Update ISSUE_TEMPLATE.md	2023-05-10 00:08:00 -04:00
HiGarfield	82ba4f7d1b	fix CMakeLists.txt	2023-02-09 01:23:51 +08:00
yancey	e5ecd33ec4	add .clang-format	2023-02-07 07:12:02 -05:00
yancey	9217e0e9e6	fix indent with clang-format	2023-02-07 07:11:49 -05:00
yancey	87b0db8862	add cmake	2023-02-07 07:02:13 -05:00
Eden Johnson	ebe13101c0	Translate : 60% Advanced Topic-Usage is skipped.	2022-03-01 19:31:30 +08:00
Eden Johnson	a424dee17d	Translate : 50% complete.	2022-02-28 21:15:55 +08:00
Eden Johnson	6cafcdf9b2	Translate: Finish about 25%	2022-02-27 22:01:53 +08:00
Yancey Wang	8ceaf27eda	Merge pull request #409 from brlin-tw/patch-2 fix typo (stabilization)	2022-01-26 00:59:47 -05:00
Yancey Wang	9f9e8caff6	Merge pull request #408 from brlin-tw/patch-1 fix typo (facktcp -> faketcp)	2022-01-26 00:59:25 -05:00
Yancey Wang	74f3eb90a7	Update README.md	2021-12-09 09:26:32 -05:00
林博仁(Buo-ren, Lin)	38286d5c5b	fix typo (stabilization) Signed-off-by: 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com>	2021-09-14 00:54:21 +08:00
林博仁(Buo-ren, Lin)	ec849322d7	fix typo (facktcp -> faketcp) Signed-off-by: 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com>	2021-09-14 00:34:07 +08:00
wangyu	b98a467eed	fix source argument is the same as destination	2021-03-11 00:45:26 -05:00
wangyu	25d3323427	fix mp compile; fix tcp option bug	2021-02-17 16:58:32 -05:00
wangyu	b8e9095135	add --fix-gro reminder	2021-01-11 05:58:31 -05:00
wangyu	026f97687a	fix packet_header->caplen <= max_data_len in network.cpp	2021-01-09 05:10:12 -05:00
wangyu-	f2f90a9a15	Update ISSUE_TEMPLATE.md	2020-09-20 05:16:05 -04:00
wangyu-	cf23f4d656	Update ISSUE_TEMPLATE.md	2020-09-20 05:12:33 -04:00
wangyu	59819db2dd	do not quit when got pcap error	2020-08-27 00:32:07 -04:00
wangyu	cc6ea766c4	update makefile	2020-08-18 03:19:18 -04:00
wangyu	509156fc14	change toochain for arm x86 x64	2020-08-17 19:48:23 -04:00
wangyu	cb9059bf3b	update readme.md	2020-08-17 18:26:20 -04:00
wangyu	07e2e695a6	put version.txt into release_mp	2020-07-27 11:33:26 -04:00
root	e8daf7c263	more fix of memory access	2020-07-26 19:07:17 +00:00
root	5f907e32d7	fix bad memorry access	2020-07-26 18:15:27 +00:00
wangyu	0e37c1fea4	fix macro in `5a51248cb0`	2020-07-15 19:32:14 -04:00
wangyu	606bbec351	add missed file	2020-07-15 17:23:17 -04:00
Kevin Darbyshire-Bryant	3fc23f5cf6	Fix devices and available typos Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>	2020-07-15 17:06:36 -04:00
Kevin Darbyshire-Bryant	f3c8f70f47	fix missing braces warning Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>	2020-07-15 17:02:21 -04:00
wangyu	6c27502757	unified makefile	2020-07-15 16:46:45 -04:00
wangyu	5a51248cb0	unify udpraw linux and mp branch	2020-07-15 15:29:32 -04:00