trunk/TTProxy/ProxyWSockHook.h

#ifndef _YEBISOCKS_PROXYWSOCKHOOK_H_
#define _YEBISOCKS_PROXYWSOCKHOOK_H_

#include <YCL/StringBuffer.h>
#include <YCL/Dialog.h>
#include <YCL/ComboBoxCtrl.h>
#include <YCL/EditBoxCtrl.h>
#include <YCL/IniFile.h>
#include <YCL/Resource.h>
#include <YCL/FileVersion.h>
using namespace yebisuya;

#include "resource.h"
#include "Hooker.h"
#include "Logger.h"
#include "SSLSocket.h"

#include "ttlib.h"
#include "i18n.h"

static void getSetupFName(char *SetupFName) {
        char homedir[MAX_PATH];
        char *i;

        GetModuleFileName(GetInstanceHandle(), homedir, sizeof(homedir));
        i = strrchr(homedir, '\\');
        if (i != NULL) {
                homedir[i-homedir] = 0;
        }

        GetDefaultSetupFName(SetupFName, homedir);
}

static LCID getLCID() {
        char SetupFName[MAX_PATH];
        char UILanguageFile[MAX_UIMSG];
        char strLCID[5];
        LCID lcid;

        getSetupFName(SetupFName);

        /* Get LanguageFile name */
        GetPrivateProfileString("Tera Term", "UILanguageFile", "",
                                                        UILanguageFile, sizeof(UILanguageFile),
                                                        SetupFName);

        GetPrivateProfileString("TTProxy", "LCID", "1033", // 0x409 English(US)
                                                        strLCID, sizeof(strLCID), UILanguageFile);
        lcid = atoi(strLCID);

        return lcid;
}

class ProxyWSockHook {
public:
    class MessageShower {
    public:
        virtual void showMessage(const char* message)const = NULL;
    };
private:
    struct DUMMYHOSTENT {
        struct hostent entry;
        in_addr addr;
        char* addrlist[2];
        char* alias;
        char hostname[1];
    };

    class AsyncSelectInfoTable {
    private:
        struct AsyncSelectInfo {
            HWND window;
            UINT message;
            long event;
            AsyncSelectInfo():window(NULL), message(0), event(0) {
            }
            AsyncSelectInfo(const AsyncSelectInfo& src):window(src.window), message(src.message), event(src.event) {
            }
            AsyncSelectInfo(HWND window, UINT message, long event):window(window), message(message), event(event) {
            }
            bool operator==(const AsyncSelectInfo& src) {
                return window == src.window && message == src.message && event == src.event;
            }
            void operator=(const AsyncSelectInfo& src) {
                window = src.window;
                message = src.message;
                event = src.event;
            }
            void operator=(int v) {
                if (v == 0) {
                    window = NULL;
                    message = 0;
                    event = 0;
                }
            }
            operator int()const {
                return window == NULL && message == 0 && event == 0 ? 0 : (int) window;
            }
        };
        Hashtable<SOCKET, AsyncSelectInfo> table;
        mutable CRITICAL_SECTION section;
    public:
        AsyncSelectInfoTable() {
            ::InitializeCriticalSection(&section);
        }
        ~AsyncSelectInfoTable() {
            ::DeleteCriticalSection(&section);
        }
        void put(SOCKET s, HWND window, UINT message, long event) {
            ::EnterCriticalSection(&section);
            if (message != 0 || event != 0) {
                table.put(s, AsyncSelectInfo(window, message, event));
            }else{
                table.remove(s);
            }
            ::LeaveCriticalSection(&section);
        }
        void get(SOCKET s, HWND& window, UINT& message, long& event)const {
            ::EnterCriticalSection(&section);
            AsyncSelectInfo info = table.get(s);
            ::LeaveCriticalSection(&section);
            window = info.window;
            message = info.message;
            event = info.event;
        }
    };
    class ProxyInfo {
    public:
        enum Type {
            TYPE_NONE,
            TYPE_HTTP,
            TYPE_TELNET,
            TYPE_SOCKS4,
            TYPE_SOCKS5,
            TYPE_SSL,
            TYPE_HTTP_SSL,
            TYPE_TELNET_SSL,
            TYPE_SOCKS4_SSL,
            TYPE_SOCKS5_SSL,
            TYPE_NONE_FORCE,
        };
    private:
        struct PROXY_TYPE_TABLE {
            Type type;
            const char* name;
        };
        static const PROXY_TYPE_TABLE* proxy_type_table() {
            static PROXY_TYPE_TABLE table[] = {
                {TYPE_HTTP,   "http"},
                {TYPE_SOCKS5, "socks"},
                {TYPE_SOCKS4, "socks4"},
                {TYPE_TELNET, "telnet"},
                {TYPE_SOCKS5, "socks5"},
                {TYPE_NONE_FORCE, "none"},
                {TYPE_HTTP_SSL,   "http+ssl"},
                {TYPE_SOCKS5_SSL, "socks+ssl"},
                {TYPE_SOCKS4_SSL, "socks4+ssl"},
                {TYPE_TELNET_SSL, "telnet+ssl"},
                {TYPE_SOCKS5_SSL, "socks5+ssl"},
                {TYPE_SSL, "ssl"},
                {TYPE_SSL, "none+ssl"},
                {TYPE_NONE, NULL},
            };
            return table;
        }
    public:
        static Type parseType(const char* string) {
            return parseType(string, string + strlen(string));
        }
        static Type parseType(const char* string, const char* end) {
            int length = end - string;
            char* buffer = (char*) alloca(length + 1);
            char* dst = buffer;
            while (length-- > 0 && *string != '\0') {
                int ch = *string++;
                if ('A' <= ch && ch <= 'Z') {
                    ch += 'a' - 'A';
                }
                *dst++ = ch;
            }
            *dst = '\0';
            const PROXY_TYPE_TABLE* table = proxy_type_table();
            while (table->name != NULL) {
                if (strcmp(buffer, table->name) == 0)
                    return table->type;
                table++;
            }
            return TYPE_NONE;
        }
        static const char* getTypeName(Type type) {
            if (type != TYPE_NONE && type != TYPE_NONE_FORCE) {
                const PROXY_TYPE_TABLE* table = proxy_type_table();
                while (table->name != NULL) {
                    if (type == table->type)
                        return table->name;
                    table++;
                }
            }
            return NULL;
        }

        static int parsePort(const char* string) {
            return parsePort(string, string + strlen(string));
        }
        static int parsePort(const char* string, const char* end) {
            if (string > end || *string < '1' || '9' < *string)
                return -1;
            int digit = 0;
            while (string < end) {
                if (*string < '0' || '9' < *string)
                    return -1;
                digit = digit * 10 + (*string - '0');
                if (digit > 65535)
                    return -1;
                string++;
            }
            if (digit == 0)
                return -1;
            return digit;
        }

        static String parse(const char* url, ProxyInfo& proxy) {
            char* p = strstr((char*) url, "://");
            if (p == NULL) {
                proxy.type = TYPE_NONE;
                return NULL;
            }
            proxy.type = parseType(url, p);
            if (proxy.type == TYPE_NONE)
                return NULL;
            p += 3;
            const char* start = p;
            while (*p != '\0' && *p != '/') {
                if (*p == ':') {
                    if (proxy.host != NULL || start >= p) {
                        proxy.type = TYPE_NONE;
                        return NULL;
                    }
                    proxy.host = urldecode(start, p);
                    start = p + 1;
                }else if (*p == '@') {
                    if (proxy.user != NULL) {
                        proxy.type = TYPE_NONE;
                        return NULL;
                    }
                    if (proxy.host == NULL) {
                        proxy.user = urldecode(start, p);
                    }else{
                        proxy.user = proxy.host;
                        proxy.pass = urldecode(start, p);
                        proxy.host = NULL;
                    }
                    start = p + 1;
                }
                p++;
            }
            if (proxy.type != TYPE_NONE_FORCE && proxy.type != TYPE_SSL) {
                if (proxy.host == NULL) {
                    if (start >= p) {
                        proxy.type = TYPE_NONE;
                        return NULL;
                    }
                    proxy.host = urldecode(start, p);
                }else{
                    proxy.port = parsePort(start, p);
                    if (proxy.port < 0) {
                        proxy.type = TYPE_NONE;
                        return NULL;
                    }
                }
            }
            if (*p == '/') {
                p++;
                return p;
            }
            return url;
        }
        String generateURL()const {
            if (type == TYPE_NONE || host == NULL)
                return NULL;
            StringBuffer buffer;
            buffer.append(getTypeName(type));
            buffer.append("://");
            if (type != TYPE_SSL) {
                if (user != NULL) {
                    urlencode(user, buffer);
                    if (pass != NULL) {
                        buffer.append(':');
                        urlencode(pass, buffer);
                    }
                    buffer.append('@');
                }
                urlencode(host, buffer);
                if (port != 0) {
                    buffer.append(':');
                    int digit = 10000;
                    while (digit > 0 && (unsigned) port < (unsigned) digit) {
                        digit /= 10;
                    }
                    while (digit > 0) {
                        int d = (unsigned) port / digit % 10;
                        digit /= 10;
                        buffer.append('0' + d);
                    }
                }
            }
            return buffer.toString();
        }
    private:
        static int hexdigit(int ch) {
            if ('0' <= ch && ch <= '9') {
                return ch - '0';
            }else if ('A' <= ch && ch <= 'F') {
                return ch - 'A' + 10;
            }else if ('a' <= ch && ch <= 'f') {
                return ch - 'a' + 10;
            }else{
                return -1;
            }
        }

        static String urldecode(const char* start, const char* end) {
            char* buffer = (char*) alloca((end - start) * 3 + 1);
            char* dst = buffer;
            int c1, c2;
            while (start < end) {
                if (*start == '%' && start + 2 < end && (c1 = hexdigit(start[1])) != -1 && (c2 = hexdigit(start[2])) != -1) {
                    *dst++ = (char) (c1 << 4 | c2);
                    start += 3;
                }else{
                    if (IsDBCSLeadByte(*start)) {
                        *dst++ = *start++;
                    }
                    *dst++ = *start++;
                }
            }
            *dst = '\0';
            return buffer;
        }
        static String urlencode(const char* string, StringBuffer& buffer) {
            static const char table[] = "0123456789ABCDEF";
            const char* start = string;
            while (*string != '\0') {
                if ('0' <= *string && *string <= '9'
                    || 'A' <= *string && *string <= 'Z'
                    || 'a' <= *string && *string <= 'z'
                    || *string == '-' || *string == '.' || *string == '_') {
                }else if (::IsDBCSLeadByte(*string)) {
                    string++;
                }else{
                    if (start < string) {
                        buffer.append(start, string - start);
                    }
                    buffer.append('%');
                    buffer.append(table[(unsigned) *string >> 4]);
                    buffer.append(table[(unsigned) *string & 0x0f]);
                    start = string + 1;
                }
                string++;
            }
            if (start < string) {
                buffer.append(start);
            }
            return buffer;
        }
    public:
        ProxyInfo():type(TYPE_NONE), port(0) {
        }
        ~ProxyInfo() {
        }
        short getPort() {
            if (port == 0) {
                switch (type) {
                case TYPE_SOCKS4:
                case TYPE_SOCKS5:
                case TYPE_SOCKS4_SSL:
                case TYPE_SOCKS5_SSL:
                    return 1080;
                case TYPE_TELNET:
                case TYPE_TELNET_SSL:
                    return 23;
                case TYPE_HTTP:
                case TYPE_HTTP_SSL:
                    return 80;
                }
            }
            return port;
        }
        Type type;
        String host;
        short port;
        String user;
        String pass;
    };

    struct ConnectionInfo {
        ProxyInfo proxy;
        String realhost;
        short  realport;
        in_addr addr;
        char* buffer;
        DWORD time;
        ConnectionInfo(ProxyInfo& proxy, String realhost):proxy(proxy), realhost(realhost), buffer(NULL) {
        }
        ~ConnectionInfo() {
            delete[] buffer;
        }
        void fillBuffer(char* buffer, int bufferLength) {
            DUMMYHOSTENT* dst = (DUMMYHOSTENT*) buffer;
            dst->addr = addr;
            dst->addrlist[0] = (char*) &dst->addr;
            dst->addrlist[1] = NULL;
            dst->entry.h_addr_list = dst->addrlist;
            dst->alias = NULL;
            dst->entry.h_aliases = &dst->alias;
            dst->entry.h_addrtype = AF_INET;
            dst->entry.h_length = sizeof (in_addr);
            dst->entry.h_name = dst->hostname;
            strcpy_s(dst->hostname, bufferLength - sizeof (DUMMYHOSTENT), realhost);
        }
    };
    class ConnectionInfoHolder {
    private:
        ConnectionInfo* info;
    public:
        ConnectionInfoHolder():info(NULL) {
        }
        ~ConnectionInfoHolder() {
            delete info;
        }
        operator ConnectionInfo*()const {
            return info;
        }
        void operator=(ConnectionInfo* newInfo) {
            if (info != newInfo) {
                delete info;
                info = newInfo;
            }
        }
        // �����o�I�����Z�q
        ConnectionInfo* operator->()const {
            return info;
        }
    };

    class ConnectionInfoList {
    private:
        CRITICAL_SECTION section;
        ConnectionInfoHolder list[254];
        Hashtable<String,ConnectionInfo*> table;
    public:
        ConnectionInfoList() {
            ::InitializeCriticalSection(&section);
        }
        ~ConnectionInfoList() {
            ::DeleteCriticalSection(&section);
        }
        HANDLE getTask(ConnectionInfo* info) {
            if (info == NULL)
                return NULL;
            return (HANDLE) -info->addr.S_un.S_un_b.s_b4;
        }
        ConnectionInfo* get(HANDLE task) {
            if ((DWORD) task >= 0)
                return NULL;
            return get((int) -((long) task) - 1);
        }
        ConnectionInfo* get(in_addr addr) {
            if (addr.S_un.S_un_b.s_b1 != 0 || addr.S_un.S_un_b.s_b2 != 0 || addr.S_un.S_un_b.s_b3 != 0)
                return NULL;
            return get(addr.S_un.S_un_b.s_b4 - 1);
        }
        ConnectionInfo* get(int index) {
            ::EnterCriticalSection(&section);
            ConnectionInfo* info = 0 <= index && index < countof(list) ? (ConnectionInfo*) list[index] : NULL;
            ::LeaveCriticalSection(&section);
            return info;
        }
        ConnectionInfo* find(const char* url) {
            ::EnterCriticalSection(&section);
            ConnectionInfo* info = table.get(url);
            ::LeaveCriticalSection(&section);
            if (info != NULL) {
                info->time = ::GetTickCount();
                return info;
            }
            ProxyInfo proxy;
            String realhost = ProxyInfo::parse(url, proxy);
            if (realhost == NULL || realhost.length() == 0) {
                proxy = instance().defaultProxy;
                if (proxy.type != ProxyInfo::TYPE_NONE) {
                    realhost = url;
                }
            }
            if (proxy.type == ProxyInfo::TYPE_NONE)
                return NULL;
            info = new ConnectionInfo(proxy, realhost);

            int i;
            ::EnterCriticalSection(&section);
            for (i = 0; i < countof(list); i++) {
                if (list[i] == NULL) {
                    list[i] = info;
                    break;
                }
            }
            if (i >= countof(list)) {
                DWORD now = ::GetTickCount();
                DWORD max = 0;
                int index = -1;
                for (i = 0; i < countof(list); i++) {
                    if (list[i] != NULL) {
                        if (now - list[i]->time > max) {
                            max = now - list[i]->time;
                            index = i;
                        }
                    }
                }
                list[index] = info;
            }
            table.put(url, info);
            ::LeaveCriticalSection(&section);
            info->addr.s_addr = htonl(i + 1);

            info->time = ::GetTickCount();
            return info;
        }
    };
    friend class ConnectionInfoList;

    class OptionsSettingDialog : public Dialog {
    private:
        ComboBoxCtrl resolveCombo;
        Window host;
        Window user;
        Window pass;
        Window conn;
        Window erro;
        Window log;
                LCID c_lcid;
    protected:
        virtual bool dispatch(int message, int wParam, long lParam) {
            if (message == WM_COMMAND && wParam == MAKEWPARAM(IDC_REFER, BN_CLICKED)) {
                char buffer[1024];
                OPENFILENAME ofn = {
                    sizeof ofn,
                    *this,
                };
                ofn.lpstrFile = buffer;
                ofn.nMaxFile = countof(buffer);
                ofn.Flags = OFN_LONGNAMES | OFN_NONETWORKBUTTON | OFN_PATHMUSTEXIST | OFN_NOREADONLYRETURN | OFN_HIDEREADONLY;
                static String title = Resource::loadString(IDS_LOGFILE_SELECT, c_lcid);
                ofn.lpstrTitle = title;
                if (logfile != NULL) {
                    strcpy_s(buffer, sizeof buffer, logfile);
                }else{
                    buffer[0] = '\0';
                }
                if (::GetSaveFileName(&ofn)) {
                    if (buffer[0] != '\0') {
                        logfile = buffer;
                    }else{
                        logfile = NULL;
                    }
                    log.SetWindowText(buffer);
                }
                return true;
            }
            return Dialog::dispatch(message, wParam, lParam);
        }
        virtual bool onInitDialog() {
            Dialog::onInitDialog();

            host = GetDlgItem(IDC_HOSTNAME);
            user = GetDlgItem(IDC_USERNAME);
            pass = GetDlgItem(IDC_PASSWORD);
            conn = GetDlgItem(IDC_CONNECTED);
            erro = GetDlgItem(IDC_ERROR);
            log = GetDlgItem(IDC_LOGFILE);

            SetDlgItemInt(IDC_TIMEOUT, timeout, false);

            resolveCombo <<= GetDlgItem(IDC_RESOLVE);
            resolveCombo.addString(instance().loadString(IDS_RESOLVE_AUTO, c_lcid));
            resolveCombo.addString(instance().loadString(IDS_RESOLVE_REMOTE, c_lcid));
            resolveCombo.addString(instance().loadString(IDS_RESOLVE_LOCAL, c_lcid));
            resolveCombo.setCurSel(resolve);

            host.SetWindowText(HostnamePrompt);
            user.SetWindowText(UsernamePrompt);
            pass.SetWindowText(PasswordPrompt);
            conn.SetWindowText(ConnectedMessage);
            erro.SetWindowText(ErrorMessage);

            if (logfile != NULL)
                log.SetWindowText(logfile);

            return true;
        }
        virtual void onOK() {
            if    (host.GetWindowTextLength() == 0
                || user.GetWindowTextLength() == 0
                || pass.GetWindowTextLength() == 0
                || conn.GetWindowTextLength() == 0
                || erro.GetWindowTextLength() == 0) {
                MessageBox(instance().loadString(IDS_EMPTY_PARAMETER, c_lcid), FileVersion::getOwnVersion().getProductName(), MB_OK | MB_ICONERROR);
                return;
            }

            timeout = GetDlgItemInt(IDC_TIMEOUT, 0, false);

            resolve = resolveCombo.getCurSel();

            HostnamePrompt   = host.GetWindowText();
            UsernamePrompt   = user.GetWindowText();
            PasswordPrompt   = pass.GetWindowText();
            ConnectedMessage = conn.GetWindowText();
            ErrorMessage     = erro.GetWindowText();

            logfile = log.GetWindowTextLength() > 0 ? log.GetWindowText() : NULL;

            Dialog::onOK();
        }
    public:
        String logfile;
        int timeout;
        int resolve;

        String HostnamePrompt;
        String UsernamePrompt;
        String PasswordPrompt;
        String ConnectedMessage;
        String ErrorMessage;

        int open(HWND owner) {
            return Dialog::open(instance().resource_module, IDD_OPTION_SETTING, owner);
        }
        int open(HWND owner, LCID lcid) {
                        c_lcid = lcid;
            return Dialog::open(instance().resource_module, IDD_OPTION_SETTING, lcid, owner);
        }
    };
    friend class OptionsSettingDialog;

    class SettingDialog : public Dialog {
    private:
        EditBoxCtrl  url;
        ComboBoxCtrl type;
        EditBoxCtrl  host;
        EditBoxCtrl  port;
        EditBoxCtrl  user;
        EditBoxCtrl  pass;
        bool lock;
                LCID c_lcid;
    protected:
        virtual bool dispatch(int message, int wParam, long lParam) {
            if (message == WM_COMMAND) {
                switch (wParam) {
                case MAKEWPARAM(IDC_OPTIONS, BN_CLICKED):
                    onOptions();
                    return true;
                case MAKEWPARAM(IDC_TYPE, CBN_SELCHANGE):
                case MAKEWPARAM(IDC_HOSTNAME, EN_CHANGE):
                case MAKEWPARAM(IDC_PORT, EN_CHANGE):
                case MAKEWPARAM(IDC_USERNAME, EN_CHANGE):
                case MAKEWPARAM(IDC_PASSWORD, EN_CHANGE):
                    if (!lock)
                        onChanged(LOWORD(wParam));
                    return true;
                }
            }
            return Dialog::dispatch(message, wParam, lParam);
        }
        virtual bool onInitDialog() {
            Dialog::onInitDialog();

            url  <<= GetDlgItem(IDC_URL);
            type <<= GetDlgItem(IDC_TYPE);
            host <<= GetDlgItem(IDC_HOSTNAME);
            port <<= GetDlgItem(IDC_PORT);
            user <<= GetDlgItem(IDC_USERNAME);
            pass <<= GetDlgItem(IDC_PASSWORD);

            lock = true;
            type.addString(instance().loadString(IDS_TYPE_NONE, c_lcid));
            type.addString("HTTP");
            type.addString("TELNET");
            type.addString("SOCKS4");
            type.addString("SOCKS5");
            type.addString("SSL");
            type.addString("HTTP+SSL");
            type.addString("TELNET+SSL");
            type.addString("SOCKS4+SSL");
            type.addString("SOCKS5+SSL");
            type.setCurSel(proxy.type);

            if (proxy.type != ProxyInfo::TYPE_NONE || proxy.type != ProxyInfo::TYPE_SSL) {
                if (proxy.host != NULL) {
                    host.SetWindowText(proxy.host);
                    if (proxy.port != 0) {
                        char buffer[16];
                        _itoa_s(proxy.port, buffer, sizeof buffer, 10);
                        port.SetWindowText(buffer);
                    }
                    if (proxy.user != NULL) {
                        user.SetWindowText(proxy.user);
                        if (proxy.pass != NULL) {
                            pass.SetWindowText(proxy.pass);
                        }
                    }
                }
            }
            lock = false;
            onChanged(0);
            return true;
        }
        virtual void onOK() {
            if (proxy.type != ProxyInfo::TYPE_NONE || proxy.type != ProxyInfo::TYPE_SSL) {
                if (proxy.host == NULL) {
                    MessageBox(instance().loadString(IDS_EMPTY_HOSTNAME, c_lcid), FileVersion::getOwnVersion().getProductName(), MB_OK | MB_ICONERROR);
                    return;
                }
                if (port.GetWindowTextLength() != 0 && proxy.port <= 0) {
                    MessageBox(instance().loadString(IDS_ILLEGAL_PORT, c_lcid), FileVersion::getOwnVersion().getProductName(), MB_OK | MB_ICONERROR);
                    return;
                }
            }
            Dialog::onOK();
        }
        void onOptions() {
            OptionsSettingDialog dlg;
            dlg.timeout = instance().timeout;
            switch (instance().resolve) {
            case RESOLVE_REMOTE:
                dlg.resolve = 1;
                break;
            case RESOLVE_LOCAL:
                dlg.resolve = 2;
                break;
            default:
                dlg.resolve = 0;
                break;
            }
            dlg.HostnamePrompt = instance().prompt_table[0];
            dlg.UsernamePrompt = instance().prompt_table[1];
            dlg.PasswordPrompt = instance().prompt_table[2];
            dlg.ConnectedMessage = instance().prompt_table[3];
            dlg.ErrorMessage = instance().prompt_table[4];
            dlg.logfile = instance().logfile;
            if (dlg.open(*this, c_lcid) == IDOK) {
                instance().timeout = dlg.timeout;
                switch (dlg.resolve) {
                case 1:
                    instance().resolve = RESOLVE_REMOTE;
                    break;
                case 2:
                    instance().resolve = RESOLVE_LOCAL;
                    break;
                default:
                    instance().resolve = RESOLVE_AUTO;
                    break;
                }
                instance().prompt_table[0] = dlg.HostnamePrompt;
                instance().prompt_table[1] = dlg.UsernamePrompt;
                instance().prompt_table[2] = dlg.PasswordPrompt;
                instance().prompt_table[3] = dlg.ConnectedMessage;
                instance().prompt_table[4] = dlg.ErrorMessage;

                if (instance().logfile != dlg.logfile) {
                    instance().logfile = dlg.logfile;
                    Logger::open(dlg.logfile);
                }
            }
        }
        void onChanged(int id) {
            if (id == 0 || id == IDC_TYPE || id == IDC_HOSTNAME || id == IDC_USERNAME) {
                int enabled = 0;
                int typeN = type.getCurSel();
                if (typeN != ProxyInfo::TYPE_NONE || typeN != ProxyInfo::TYPE_SSL) {
                    enabled |= 1;
                    if (::GetWindowTextLength(GetDlgItem(IDC_HOSTNAME)) > 0) {
                        enabled |= 2;
                        if (::GetWindowTextLength(GetDlgItem(IDC_USERNAME)) > 0) {
                            enabled |= 4;
                        }
                    }
                }
                ::EnableWindow(GetDlgItem(IDC_HOSTNAME), (enabled & 1) != 0);
                ::EnableWindow(GetDlgItem(IDC_PORT), (enabled & 2) != 0);
                ::EnableWindow(GetDlgItem(IDC_USERNAME), (enabled & 2) != 0);
                ::EnableWindow(GetDlgItem(IDC_PASSWORD), (enabled & 4) != 0);
            }

            if (id != 0) {
                proxy.type = (ProxyInfo::Type) type.getCurSel();
                if (proxy.type != ProxyInfo::TYPE_NONE || proxy.type != ProxyInfo::TYPE_SSL) {
                    proxy.host = host.GetWindowText();
                    if (host.GetWindowTextLength() == 0) {
                        proxy.host = NULL;
                    }else{
                        proxy.host = host.GetWindowText();
                    }
                    proxy.port = GetDlgItemInt(IDC_PORT, NULL, FALSE);
                    proxy.user = user.GetWindowTextLength() > 0 ? user.GetWindowText() : NULL;
                    proxy.pass = pass.GetWindowTextLength() > 0 ? pass.GetWindowText() : NULL;
                }else{
                    proxy.host = NULL;
                    proxy.port = 0;
                    proxy.user = NULL;
                    proxy.pass = NULL;
                }
            }
            String urlS = proxy.generateURL();
            if (urlS == NULL) {
                urlS = "none:///";
            }
            url.SetWindowText(urlS);
        }
    public:
        ProxyInfo proxy;
        SettingDialog():lock(false) {
        }

        int open(HWND owner) {
            return Dialog::open(instance().resource_module, IDD_SETTING, owner);
        }
        int open(HWND owner, LCID lcid) {
                        c_lcid = lcid;
            return Dialog::open(instance().resource_module, IDD_SETTING, lcid, owner);
        }
    };
    friend class SettingDialog;

    class AboutDialog : public Dialog {
    private:
        virtual bool onInitDialog() {
            String buf;
            char *buf2;
            const char *ver;
            int n, a, b, c, d, len;

            buf = GetDlgItemText(IDC_VERSION);
            len = buf.length() + 4;
            buf2 = (char *)_alloca(len);
            if (buf2 == NULL) {
                return true;
            }
            ver = FileVersion::getOwnVersion().getFileVersion();
            n = sscanf_s(ver, "%d, %d, %d, %d", &a, &b, &c, &d);
            if (n == 4) {
                sprintf_s(buf2, len, buf, a, b, c, d);
            }
            SetDlgItemText(IDC_VERSION, (n == 4) ? buf2 : buf);

            return true;
        }
    public :
        int open(HWND owner, LCID lcid) {
            return Dialog::open(instance().resource_module, IDD_ABOUTDIALOG, lcid, owner);
        }
    };
    friend class AboutDialog;

    int _sendToSocket(SOCKET s, const unsigned char* buffer, int size) {
        int count = 0;
        while (count < size) {
            struct timeval tv = {timeout, 0};
            fd_set fd;
            FD_ZERO(&fd);
            FD_SET(s, &fd);
            if (select((int) (s + 1), NULL, &fd, NULL, timeout > 0 ? &tv : NULL) == SOCKET_ERROR)
                return SOCKET_ERROR;
            if (!FD_ISSET(s, &fd)) {
                return SOCKET_ERROR;
            }
            int written = ORIG_send(s, (const char*) buffer + count, size - count, 0);
            if (written == SOCKET_ERROR)
                return SOCKET_ERROR;
            count += written;
        }
        return count;
    }

    int sendToSocket(SOCKET s, const unsigned char* buffer, int size) {
        int i = 0;
        Logger::log("send", buffer, size);
        return _sendToSocket(s, buffer, size);
    }

    int sendToSocketFormat(SOCKET s, const char* format, ...) {
        char buf[1024];
        int len;
        va_list arglist;
        va_start(arglist, format);
        len = wvsprintf(buf, format, arglist);
        va_end(arglist);
        Logger::log("send", buf);
        return _sendToSocket(s, (const unsigned char*) buf, len);
    }

    int recieveFromSocketTimeout(SOCKET s, unsigned char* buffer, int size, int timeout) {
        int ready = 0;
        while (!ready) {
            struct timeval tv = {timeout, 0};
            fd_set fd;
            FD_ZERO(&fd);
            FD_SET(s, &fd);
            switch (select((int) (s + 1), &fd, NULL, NULL, timeout > 0 ? &tv : NULL)) {
            case SOCKET_ERROR:
                return SOCKET_ERROR;
            case 0:
                return 0;
            default:
                ready = FD_ISSET(s, &fd);
                break;
            }
        }
        return ORIG_recv(s, (char*) buffer, size, 0);
    }

    int recieveFromSocket(SOCKET s, unsigned char* buffer, int size) {
        int result = recieveFromSocketTimeout(s, buffer, size, timeout);
        if (result != SOCKET_ERROR) {
            Logger::log("recv", buffer, result);
        }
        return result;
    }

    int line_input(SOCKET s, char *buf, int size) {
        char* dst = buf;
        if (size == 0)
            return 0; /* no error */
        size--;
        while (size > 0) {
            switch (recieveFromSocketTimeout(s, (unsigned char*) dst, 1, timeout)) {
            case SOCKET_ERROR:
                return SOCKET_ERROR;
            case 0:
                size = 0;
                break;
            default:
                if (*dst == '\n') {
                    size = 0;
                } else {
                    size--;
                }
                dst++;
                break;
            }
        }
        *dst = '\0';
        Logger::log("recv", buf);
        return 0;
    }

    int wait_for_prompt(SOCKET s, String prompts[], int count, int timeout /* sec */) {
        char buf[1024];
        while (1) {
            char *dst = buf;
            char *end = buf + sizeof buf - 1;
            while (dst < end) {
                switch (recieveFromSocketTimeout(s, (unsigned char*) dst, 1, timeout)) {    /* recv one-by-one */
                case SOCKET_ERROR:
                    if (WSAGetLastError() != WSAEWOULDBLOCK) {
                        return SOCKET_ERROR;
                    }
                    // no break
                case 0:
                    end = dst;                              /* end of stream */
                    break;
                default:
                    /* continue reading until last 1 char is EOL? */
                    if (*dst++ == '\n') {
                        /* finished */
                        end = dst;
                    }
                }
            }
            if (dst > buf) {
                int i;
                *dst = '\0';
                Logger::log("recv", buf);
                for (i = 0; i < count; i++) {
                    char* found = strstr(buf, prompts[i]);
                    if (found != NULL) {
                        return i;
                    }
                }
            }
        }
    }

    int begin_relay_http(ProxyInfo& proxy, String realhost, short realport, SOCKET s) {
        static const char base64_table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
        char buf[1024];
        int status_code;
        if (sendToSocketFormat(s, "CONNECT %s:%d HTTP/1.0\r\n", realhost, realport) == SOCKET_ERROR)
            return SOCKET_ERROR;
        if (proxy.user != NULL) {
            int userlen = strlen(proxy.user);
            int passlen = strlen(proxy.pass);
            int authlen = userlen + 1 + passlen;
            int encodedlen = (authlen + 2) / 3 * 4;
            char* auth = (char*) alloca(authlen + 1);
            char* encoded = (char*) alloca(encodedlen + 1);
            unsigned char *src = (unsigned char *) auth;
            char *dst = encoded;
            int bits = 0;
            int data = 0;
            strcpy_s(auth, userlen + 1, proxy.user);
            auth[userlen] = ':';
            strcpy_s(auth + userlen + 1, passlen, proxy.pass);
        
            /* make base64 string */
            while (*src != '\0') {
                data = (data << 8) | *src++;
                bits += 8;
                while (bits >= 6){
                    bits -= 6;
                    *dst++ = base64_table[0x3F & (data >> bits)];
                    encodedlen--;
                }
            }
            while (encodedlen-- > 0) { 
                *dst++ = '=';
            }
            *dst = '\0';

            if (sendToSocketFormat(s, "Proxy-Authorization: Basic %s\r\n", encoded) == SOCKET_ERROR)
                return SOCKET_ERROR;
        }
        if (sendToSocketFormat(s, "\r\n") == SOCKET_ERROR)
            return SOCKET_ERROR;
        if (line_input(s, buf, sizeof buf)  == SOCKET_ERROR)
            return SOCKET_ERROR;
        status_code = atoi(strchr(buf, ' '));
        do {
            if (line_input(s, buf, sizeof buf) == SOCKET_ERROR) {
                return SOCKET_ERROR;
            }
        } while (strcmp(buf,"\r\n") != 0);
        if (status_code != 200) {
            int msgid;
            switch (status_code) {
            case 401:
            case 407:
                msgid = IDS_PROXY_UNAUTHORIZED;
                break;
            case 400:
            case 405:
            case 406:
            case 403:
                msgid = IDS_PROXY_BAD_REQUEST;
                break;
            }
            return setError(s, msgid, 0x409);
        }
        return 0;
    }

    enum {
        SOCKS5_VERSION          = 5,
        SOCKS5_REJECT           = 0xFF,    /* No acceptable */
        SOCKS5_CMD_CONNECT      = 1,
        SOCKS5_ATYP_IPv4        = 1,
        SOCKS5_ATYP_DOMAINNAME  = 3,
        SOCKS5_ATYP_IPv6        = 4,
        SOCKS5_AUTH_SUBNEGOVER  = 1,

        /* informations for SOCKS */
        SOCKS5_REP_SUCCEEDED    = 0x00,    /* succeeded */
        SOCKS5_REP_FAIL         = 0x01,    /* general SOCKS serer failure */
        SOCKS5_REP_NALLOWED     = 0x02,    /* connection not allowed by ruleset */
        SOCKS5_REP_NUNREACH     = 0x03,    /* Network unreachable */
        SOCKS5_REP_HUNREACH     = 0x04,    /* Host unreachable */
        SOCKS5_REP_REFUSED      = 0x05,    /* connection refused */
        SOCKS5_REP_EXPIRED      = 0x06,    /* TTL expired */
        SOCKS5_REP_CNOTSUP      = 0x07,    /* Command not supported */
        SOCKS5_REP_ANOTSUP      = 0x08,    /* Address not supported */
        SOCKS5_REP_INVADDR      = 0x09,    /* Inalid address */

        /* SOCKS5 authentication methods */
        SOCKS5_AUTH_NOAUTH      = 0x00,    /* without authentication */
        SOCKS5_AUTH_GSSAPI      = 0x01,    /* GSSAPI */
        SOCKS5_AUTH_USERPASS    = 0x02,    /* User/Password */
        SOCKS5_AUTH_CHAP        = 0x03,    /* Challenge-Handshake Auth Proto. */
        SOCKS5_AUTH_EAP         = 0x05,    /* Extensible Authentication Proto. */
        SOCKS5_AUTH_MAF         = 0x08,    /* Multi-Authentication Framework */
    };
    int begin_relay_socks5(ProxyInfo& proxy, String realhost, short realport, SOCKET s) {
        int len;
        unsigned char auth_method;
        int auth_result;
        unsigned char buf[256];
        unsigned char* ptr = buf;
        *ptr++ = SOCKS5_VERSION;
        if (proxy.user != NULL && proxy.pass != NULL) {
            *ptr++ = 2; // support 2 auth methods : SOCKS5_AUTH_NOAUTH, SOCKS5_AUTH_USERPASS
            *ptr++ = SOCKS5_AUTH_NOAUTH;
            *ptr++ = SOCKS5_AUTH_USERPASS;
        }else{
            *ptr++ = 1; // support only 1 auth method : SOCKS5_AUTH_NOAUTH
            *ptr++ = SOCKS5_AUTH_NOAUTH;
        }
        if (sendToSocket(s, buf, ptr - buf) == SOCKET_ERROR)
            return SOCKET_ERROR;
        if (recieveFromSocket(s, buf, 2) == SOCKET_ERROR)
            return SOCKET_ERROR;

        if (buf[0] != SOCKS5_VERSION || buf[1] == SOCKS5_REJECT) {
            return setError(s, IDS_PROXY_BAD_REQUEST, 0x409);
        }
        auth_method = buf[1];

        auth_result = -1;
        switch (auth_method) {
        case SOCKS5_AUTH_NOAUTH:
            /* nothing to do */
            auth_result = 0;
            break;
        case SOCKS5_AUTH_USERPASS:
            /* make authentication packet */
            ptr = buf;
            *ptr++ = SOCKS5_AUTH_SUBNEGOVER;
            len = proxy.user.length();
            *ptr++ = len;
            strcpy_s((char*) ptr, sizeof buf - (ptr - buf), proxy.user);
            ptr += len;
            len = proxy.pass.length();
            *ptr++ = len;
            strcpy_s((char*) ptr, sizeof buf - (ptr - buf), proxy.pass);
            ptr += len;

            /* send it and get answer */
            if (sendToSocket(s, buf, ptr - buf) == SOCKET_ERROR) 
                return SOCKET_ERROR;
            if (recieveFromSocket(s, buf, 2) == SOCKET_ERROR) 
                return SOCKET_ERROR;

            /* check status */
            auth_result = buf[1] != 0;
            break;
        default:
            return setError(s, IDS_PROXY_BAD_REQUEST, getLCID());
        }
        if (auth_result == SOCKET_ERROR) {
            return SOCKET_ERROR;
        }else if (auth_result != 0) {
            return setError(s, IDS_PROXY_UNAUTHORIZED, getLCID());
        }
        /* request to connect */
        ptr = buf;
        *ptr++ = SOCKS5_VERSION;
        *ptr++ = SOCKS5_CMD_CONNECT;
        *ptr++ = 0; /* reserved */
        in_addr addr;
        addr.s_addr = INADDR_NONE;
        char ch = realhost.charAt(0);
        if ('0' <= ch && ch <= '9') {
            addr.s_addr = inet_addr(realhost);
        }
        if (addr.s_addr != INADDR_NONE) {
            *ptr++ = SOCKS5_ATYP_IPv4;
            memcpy(ptr, &addr, sizeof addr);
            ptr += sizeof addr;
        }else{
            struct hostent* entry = resolve != RESOLVE_REMOTE ? gethostbyname(realhost) : NULL;
            if (entry != NULL) {
#ifndef AF_INET6
#define AF_INET6 23
#endif
                if ((entry->h_addrtype == AF_INET || entry->h_addrtype == AF_INET6) 
                    && entry->h_length == (entry->h_addrtype == AF_INET ? 4 : 16)) {
                    *ptr++ = entry->h_addrtype == AF_INET ? SOCKS5_ATYP_IPv4 : SOCKS5_ATYP_IPv6;
                    memcpy(ptr, entry->h_addr_list[0], entry->h_length);
                    ptr += entry->h_length;
                }else{
                    WSASetLastError(WSAECONNREFUSED);
                    return SOCKET_ERROR;
                }
            }else if (resolve == RESOLVE_LOCAL) {
                WSASetLastError(WSAECONNREFUSED);
                return SOCKET_ERROR;
            }else{
                *ptr++ = SOCKS5_ATYP_DOMAINNAME;
                len = strlen(realhost);
                *ptr++ = len;
                memcpy(ptr, realhost, len);
                ptr += len;
            }
        }
        *ptr++ = realport >> 8;     /* DST.PORT */
        *ptr++ = realport & 0xFF;
        if (sendToSocket(s, buf, ptr - buf) == SOCKET_ERROR)
            return SOCKET_ERROR;
        if (recieveFromSocket(s, buf, 4) == SOCKET_ERROR)
            return SOCKET_ERROR;
        if (buf[0] != SOCKS5_VERSION || buf[1] != SOCKS5_REP_SUCCEEDED) {   /* check reply code */
            return setError(s, IDS_PROXY_BAD_REQUEST, getLCID());
        }
        // buf[2] is reserved
        switch (buf[3]) { /* case by ATYP */
        case SOCKS5_ATYP_IPv4:
            /* recv IPv4 addr and port */
            if (recieveFromSocket(s, buf, 4 + 2) == SOCKET_ERROR)
                return SOCKET_ERROR;
            break;
        case SOCKS5_ATYP_DOMAINNAME:
            /* recv name and port */
            if (recieveFromSocket(s, buf, 1) == SOCKET_ERROR)
                return SOCKET_ERROR;
            if (recieveFromSocket(s, buf, buf[0] + 2) == SOCKET_ERROR)
                return SOCKET_ERROR;
            break;
        case SOCKS5_ATYP_IPv6:
            /* recv IPv6 addr and port */
            if (recieveFromSocket(s, buf, 16 + 2) == SOCKET_ERROR)
                return SOCKET_ERROR;
            break;
        }
        /* Conguraturation, connected via SOCKS5 server! */
        return 0;
    }

    enum {
        SOCKS4_VERSION          = 4,
        SOCKS4_CMD_CONNECT      = 1,

        SOCKS4_REP_SUCCEEDED    = 90,      /* rquest granted (succeeded) */
        SOCKS4_REP_REJECTED     = 91,      /* request rejected or failed */
        SOCKS4_REP_IDENT_FAIL   = 92,      /* cannot connect identd */
        SOCKS4_REP_USERID       = 93,      /* user id not matched */
    };

    int begin_relay_socks4(ProxyInfo& proxy, String realhost, short realport, SOCKET s) {
        unsigned char buf[256], *ptr;

        /* make connect request packet 
           protocol v4:
             VN:1, CD:1, PORT:2, ADDR:4, USER:n, NULL:1
           protocol v4a:
             VN:1, CD:1, PORT:2, DUMMY:4, USER:n, NULL:1, HOSTNAME:n, NULL:1
        */
        ptr = buf;
        *ptr++ = SOCKS4_VERSION;
        *ptr++ = SOCKS4_CMD_CONNECT;
        *ptr++ = realport >> 8;
        *ptr++ = realport & 0xFF;
        in_addr addr;
        addr.s_addr = INADDR_NONE;
        char ch = realhost.charAt(0);
        if ('0' <= ch && ch <= '9') {
            addr.s_addr = inet_addr(realhost);
        }
        if (addr.s_addr != INADDR_NONE) {
            memcpy(ptr, &addr, sizeof addr);
            ptr += sizeof addr;
        }else{
            struct hostent* entry = resolve != RESOLVE_REMOTE ? gethostbyname(realhost) : NULL;
            if (entry != NULL && entry->h_addrtype == AF_INET && entry->h_length == sizeof (in_addr)) {
                addr.s_addr = INADDR_LOOPBACK;
                memcpy(ptr, entry->h_addr_list[0], entry->h_length);
                ptr += entry->h_length;
            }else if (resolve == RESOLVE_LOCAL) {
                WSASetLastError(WSAECONNREFUSED);
                return SOCKET_ERROR;
            }else{
                /* destination IP  fake, protocol 4a */
                *ptr++ = 0;
                *ptr++ = 0;
                *ptr++ = 0;
                *ptr++ = 1;
            }
        }
        /* username */
        if (proxy.user != NULL) {
            strcpy_s((char*) ptr, sizeof buf - (ptr - buf), proxy.user);
            ptr += proxy.user.length() + 1;
        }else{
            *ptr++ = '\0';
        }
        if (addr.s_addr == INADDR_NONE) {
            /* destination host name (for protocol 4a) */
            strcpy_s((char*) ptr, sizeof buf - (ptr - buf), realhost);
            ptr += strlen(realhost) + 1;
        }
        /* send command and get response
           response is: VN:1, CD:1, PORT:2, ADDR:4 */
        if (sendToSocket(s, buf, ptr - buf) == SOCKET_ERROR) {
            return SOCKET_ERROR;
        }
        if (recieveFromSocket(s, buf, 8) == SOCKET_ERROR) {
            return SOCKET_ERROR;
        }
        int messageid = 0;
        if (buf[0] != 0) {
            messageid = IDS_PROXY_BAD_REQUEST;
        }else if (buf[1] == SOCKS4_REP_IDENT_FAIL || buf[1] == SOCKS4_REP_USERID) {
            messageid = IDS_PROXY_UNAUTHORIZED;
        }else if (buf[1] != SOCKS4_REP_SUCCEEDED) {
            messageid = IDS_PROXY_BAD_REQUEST;
        }
        if (messageid != 0) {
            return setError(s, messageid, getLCID());
        }
    
        /* Conguraturation, connected via SOCKS4 server! */
        return 0;
    }

    int begin_relay_telnet(ProxyInfo& proxy, String realhost, short realport, SOCKET s) {
        int err = 0;

        while (!err) {
            switch (wait_for_prompt(s, prompt_table, countof(prompt_table), 10)) {
            case 0: /* Hostname prompt */
                if (sendToSocketFormat(s, "%s:%d\n", realhost, realport) == SOCKET_ERROR)
                    return SOCKET_ERROR;
                break;
            case 1: /* Username prompt */
                if (sendToSocketFormat(s, "%s\n", proxy.user) == SOCKET_ERROR)
                    return SOCKET_ERROR;
                break;
            case 2: /* Password prompt */
                if (sendToSocketFormat(s, "%s\n", proxy.pass) == SOCKET_ERROR)
                    return SOCKET_ERROR;
                break;
            case 3: /* Established message */
                return 0;
            case 4: /* Refused message */
            default: /* Connection error, etc. */
                err = 1;
                break;
            }
        }
        return setError(s, IDS_PROXY_BAD_REQUEST, getLCID());
    }

    String loadString(int id, LCID lcid) {
        return Resource::loadString(resource_module, id, lcid);
    }
    int setError(SOCKET s, int id, LCID lcid) {
        if (id != 0)
            showMessage(id, lcid);
        HWND window;
        UINT message;
        long event;
        asyncselectinfo.get(s, window, message, event);
        if ((event & FD_CONNECT) != 0) {
            MSG msg;
            while (::PeekMessage(&msg, window, message, message, PM_REMOVE))
                ;
        }
        WSASetLastError(WSAECONNREFUSED);
        return SOCKET_ERROR;
    }
    void showMessage(int id, LCID lcid) {
        if (shower != NULL) {
            shower->showMessage(loadString(id, lcid));
        }
    }

#define DECLARE_HOOKAPI(RETTYPE, APINAME, ARGLIST, ARGS)   \
public:                                                    \
    static FARPROC hook_##APINAME(FARPROC original) {      \
        (FARPROC&) instance().ORIG_##APINAME = original;   \
        return (FARPROC) HOOKEDAPI_##APINAME;              \
    }                                                      \
    static FARPROC unhook_##APINAME(FARPROC hookedProc) {  \
        return hookedProc == (FARPROC) HOOKEDAPI_##APINAME \
            ? (FARPROC) instance().ORIG_##APINAME          \
            : hookedProc;                                  \
    }                                                      \
private:                                                   \
    static RETTYPE PASCAL HOOKEDAPI_##APINAME ARGLIST {    \
        return instance().hooked_##APINAME ARGS;           \
    }                                                      \
    RETTYPE (PASCAL* ORIG_##APINAME) ARGLIST;              \
    RETTYPE hooked_##APINAME ARGLIST

#define INSTALL_HOOKAPI(APINAME) \
    Hooker::hook(module, (FARPROC) instance().ORIG_##APINAME, (FARPROC) HOOKEDAPI_##APINAME);

#define UNINSTALL_HOOKAPI(APINAME) \
    Hooker::hook(module, (FARPROC) HOOKEDAPI_##APINAME, (FARPROC) instance().ORIG_##APINAME);

#define LOADAPI(APINAME) \
    (FARPROC&) ORIG_##APINAME = ::GetProcAddress(wsock32, #APINAME);

#define SETUP_HOOKAPI(APINAME) \
    Hooker::setup((FARPROC) instance().ORIG_##APINAME, (FARPROC) HOOKEDAPI_##APINAME);

    DECLARE_HOOKAPI(int, connect, (SOCKET s, const struct sockaddr* name, int namelen), (s, name, namelen)) {
        ConnectionInfo* info = NULL;
        ConnectionInfoHolder holder;
        if (name->sa_family == AF_INET) {
            struct sockaddr_in* in = (struct sockaddr_in*) name;
            info = connectioninfolist.get(in->sin_addr);
            if (info == NULL && defaultProxy.type != ProxyInfo::TYPE_NONE) {
                info = new ConnectionInfo(defaultProxy, inet_ntoa(in->sin_addr));
                holder = info;
            }
        }
        if (info != NULL) {
            if (info->proxy.type == ProxyInfo::TYPE_NONE_FORCE) {
                info = NULL;
            }else{
                const char* hostname;
                if (info->proxy.type == ProxyInfo::TYPE_SSL) {
                    hostname = info->realhost;
                }else{
                    info->realport = ntohs(((struct sockaddr_in*) name)->sin_port);
                    ((struct sockaddr_in*) name)->sin_port = htons(info->proxy.getPort());
                    hostname = info->proxy.host;
                }
                struct hostent* entry = ORIG_gethostbyname(hostname);
                if (entry == NULL) {
                    WSASetLastError(WSAECONNREFUSED);
                    return SOCKET_ERROR;
                }
                memcpy(&((struct sockaddr_in*) name)->sin_addr, entry->h_addr_list[0], entry->h_length);
            }
        }
        int result = ORIG_connect(s, name, namelen);
        if (info == NULL || info->proxy.port == 0) {
            return result;
        }
        if (result == 0) {
            // do nothing
        }else if (WSAGetLastError() == WSAEWOULDBLOCK) {
            struct timeval tv = {timeout, 0};
            fd_set ifd;
            fd_set ofd;
            fd_set efd;
            FD_ZERO(&ifd);
            FD_ZERO(&ofd);
            FD_ZERO(&efd);
            FD_SET(s, &ifd);
            FD_SET(s, &ofd);
            FD_SET(s, &efd);
            if (select((int) (s + 1), &ifd, &ofd, &efd, timeout > 0 ? &tv : NULL) == SOCKET_ERROR)
                return SOCKET_ERROR;
            if (FD_ISSET(s, &efd)) {
                WSASetLastError(WSAECONNREFUSED);
                return SOCKET_ERROR;
            }
        }else{
            return SOCKET_ERROR;
        }
        switch (info->proxy.type) {
        default:
            result = 0;
            break;
        case ProxyInfo::TYPE_HTTP:
        case ProxyInfo::TYPE_HTTP_SSL:
            result = begin_relay_http(info->proxy, info->realhost, info->realport, s);
            break;
        case ProxyInfo::TYPE_TELNET:
        case ProxyInfo::TYPE_TELNET_SSL:
            result = begin_relay_telnet(info->proxy, info->realhost, info->realport, s);
            break;
        case ProxyInfo::TYPE_SOCKS4:
        case ProxyInfo::TYPE_SOCKS4_SSL:
            result = begin_relay_socks4(info->proxy, info->realhost, info->realport, s);
            break;
        case ProxyInfo::TYPE_SOCKS5:
        case ProxyInfo::TYPE_SOCKS5_SSL:
            result = begin_relay_socks5(info->proxy, info->realhost, info->realport, s);
            break;
        }
        if (result == 0) {
            if (info->proxy.type == ProxyInfo::TYPE_SSL
                || info->proxy.type == ProxyInfo::TYPE_HTTP_SSL
                || info->proxy.type == ProxyInfo::TYPE_TELNET_SSL
                || info->proxy.type == ProxyInfo::TYPE_SOCKS4_SSL
                || info->proxy.type == ProxyInfo::TYPE_SOCKS5_SSL) {
                if (!SSLSocket::isEnabled()) {
                    WSASetLastError(WSAECONNREFUSED);
                    return SOCKET_ERROR;
                }
                SSLSocket* ssl = new SSLSocket();
                if (!ssl->connect(s, info->realhost)) {
                    shutdown(s, SD_BOTH);
                    int error_code = ssl->get_verify_result();
                    delete ssl;
                    return setError(s, error_code, getLCID());
                }
                sslmap.put(s,ssl);
            }
        }
        return result;
    }

    DECLARE_HOOKAPI(struct hostent*, gethostbyname, (const char* hostname), (hostname)) {
        ConnectionInfo* info = connectioninfolist.find(hostname);
        if (info != NULL) {
            if (info->proxy.type == ProxyInfo::TYPE_NONE_FORCE) {
                hostname = info->realhost;
            }else{
                if (info->proxy.type == ProxyInfo::TYPE_SSL
                    || info->proxy.type == ProxyInfo::TYPE_HTTP_SSL
                    || info->proxy.type == ProxyInfo::TYPE_TELNET_SSL
                    || info->proxy.type == ProxyInfo::TYPE_SOCKS4_SSL
                    || info->proxy.type == ProxyInfo::TYPE_SOCKS5_SSL) {
                    if (!SSLSocket::isEnabled()) {
                        ::WSASetLastError(WSAHOST_NOT_FOUND);
                        return NULL;
                    }
                }
                if (info->buffer == NULL) {
                    int bufferLength = sizeof (DUMMYHOSTENT) + strlen(info->realhost);
                    info->buffer = new char[bufferLength];
                    info->fillBuffer(info->buffer, bufferLength);
                }
                return (struct hostent*) info->buffer;
            }
        }
        return ORIG_gethostbyname(hostname);
    }

    DECLARE_HOOKAPI(HANDLE, WSAAsyncGetHostByName, (HWND window, UINT message, const char* hostname, char* buffer, int bufferLength), (window, message, hostname, buffer, bufferLength)) {
        ConnectionInfo* info = connectioninfolist.find(hostname);
        if (info == NULL || info->proxy.type == ProxyInfo::TYPE_NONE_FORCE) {
            return ORIG_WSAAsyncGetHostByName(window, message, hostname, buffer, bufferLength);
        }
        if (info->proxy.type == ProxyInfo::TYPE_SSL
            || info->proxy.type == ProxyInfo::TYPE_HTTP_SSL
            || info->proxy.type == ProxyInfo::TYPE_TELNET_SSL
            || info->proxy.type == ProxyInfo::TYPE_SOCKS4_SSL
            || info->proxy.type == ProxyInfo::TYPE_SOCKS5_SSL) {
            if (!SSLSocket::isEnabled()) {
                ::WSASetLastError(WSAHOST_NOT_FOUND);
                return NULL;
            }
        }
        HANDLE handle = connectioninfolist.getTask(info);
        int len = sizeof (DUMMYHOSTENT) + strlen(hostname);
        if (bufferLength < len) {
            ::PostMessage(window, message, (WPARAM) handle, MAKELPARAM(len, WSAENOBUFS));
            ::WSASetLastError(WSAENOBUFS);
            return handle;
        }
        info->fillBuffer(buffer, bufferLength);
        ::PostMessage(window, message, (WPARAM) handle, MAKELPARAM(len, 0));
        return handle;
    }

    DECLARE_HOOKAPI(int, WSAAsyncSelect, (SOCKET s, HWND window, UINT message, long event), (s, window, message, event)) {
        asyncselectinfo.put(s, window, message, event);
        return ORIG_WSAAsyncSelect(s, window, message, event);
    }

    DECLARE_HOOKAPI(int, WSACancelAsyncRequest, (HANDLE task), (task)) {
        ConnectionInfo* info = connectioninfolist.get(task);
        if (info != NULL) {
            return 0;
        }
        return ORIG_WSACancelAsyncRequest(task);
    }

    DECLARE_HOOKAPI(int, send, (SOCKET s, const char* buf, int len, int flags), (s, buf, len, flags)) {
        SSLSocket* ssl = sslmap.get(s);
        if (ssl != NULL)
            return ssl->write(buf, len);
        return ORIG_send(s, buf, len, flags);
    }
    DECLARE_HOOKAPI(int, sendto, (SOCKET s, const char* buf, int len, int flags,   const struct sockaddr* to, int tolen), (s, buf, len, flags, to, tolen)) {
        return ORIG_sendto(s, buf, len, flags, to, tolen);
    }
    DECLARE_HOOKAPI(int, recv, (SOCKET s, char* buf, int len, int flags), (s, buf, len, flags)) {
        SSLSocket* ssl = sslmap.get(s);
        if (ssl != NULL)
            return ssl->read(buf, len);
        return ORIG_recv(s, buf, len, flags);
    }
    DECLARE_HOOKAPI(int, recvfrom, (SOCKET s, char* buf, int len, int flags, struct sockaddr* from, int* fromlen), (s, buf, len, flags, from, fromlen)) {
        return ORIG_recvfrom(s, buf, len, flags, from, fromlen);
    }
    DECLARE_HOOKAPI(int, closesocket, (SOCKET s), (s)) {
        SSLSocket* ssl = sslmap.get(s);
        if (ssl != NULL) {
            ssl->close();
            sslmap.remove(s);
            delete ssl;
        }
        return ORIG_closesocket(s);
    }

    String logfile;
    int timeout;
    enum SocksResolve {
        RESOLVE_AUTO,
        RESOLVE_REMOTE,
        RESOLVE_LOCAL,
    } resolve;
    String prompt_table[5];
    ProxyInfo defaultProxy;
    ConnectionInfoList connectioninfolist;
    Hashtable<SOCKET, SSLSocket*> sslmap;
    MessageShower* shower;
    HWND owner;
    HMODULE resource_module;
    AsyncSelectInfoTable asyncselectinfo;

    ProxyWSockHook():shower(NULL), owner(NULL), resource_module(GetInstanceHandle()), timeout(0) {
        HMODULE wsock32 = ::GetModuleHandle("wsock32.dll");
        LOADAPI(connect)
        LOADAPI(gethostbyname)
        LOADAPI(WSAAsyncGetHostByName)
        LOADAPI(WSAAsyncSelect)
        LOADAPI(WSACancelAsyncRequest)
        LOADAPI(send)
        LOADAPI(sendto)
        LOADAPI(recv)
        LOADAPI(recvfrom)
        LOADAPI(closesocket)
    }
    static ProxyWSockHook& instance() {
        static ProxyWSockHook instance;
        return instance;
    }
    void _load(IniFile& ini) {
        String temp;
        temp = ini.getString("ProxyType");
        if (temp != NULL) {
            defaultProxy.type = ProxyInfo::parseType(temp);
            if (defaultProxy.type != ProxyInfo::TYPE_NONE) {
                defaultProxy.host = ini.getString("ProxyHost");
                if (defaultProxy.host == NULL || defaultProxy.type == ProxyInfo::TYPE_NONE_FORCE) {
                    defaultProxy.type = ProxyInfo::TYPE_NONE;
                }else{
                    defaultProxy.port = (short) ini.getInteger("ProxyPort");
                    defaultProxy.user = ini.getString("ProxyUser");
                    if (defaultProxy.user != NULL)
                        defaultProxy.pass = ini.getString("ProxyPass");
                }
            }
        }

        timeout = ini.getInteger("ConnectionTimeout", 10);

        temp = ini.getString("SocksResolve");
        if (temp.equalsIgnoreCase("remote")) {
            resolve = RESOLVE_REMOTE;
        }else if (temp.equalsIgnoreCase("local")) {
            resolve = RESOLVE_LOCAL;
        }else{
            resolve = RESOLVE_AUTO;
        }

        prompt_table[0] = ini.getString("TelnetHostnamePrompt", ">> Host name: ");
        prompt_table[1] = ini.getString("TelnetUsernamePrompt", "Username:");
        prompt_table[2] = ini.getString("TelnetPasswordPrompt", "Password:");
        prompt_table[3] = ini.getString("TelnetConnectedMessage", "-- Connected to ");
        prompt_table[4] = ini.getString("TelnetErrorMessage", "!!!!!!!!");

        logfile = ini.getString("DebugLog");
        Logger::open(logfile);
    }
    void _save(IniFile& ini) {
        const char* type = NULL;
        const char* host = NULL;
        const char* port = NULL;
        const char* user = NULL;
        const char* pass = NULL;
        if (defaultProxy.type != ProxyInfo::TYPE_NONE && defaultProxy.type != ProxyInfo::TYPE_NONE_FORCE && defaultProxy.host != NULL) {
            type = ProxyInfo::getTypeName(defaultProxy.type);
            host = defaultProxy.host;
            if (defaultProxy.port != 0) {
                char* buffer = (char*) alloca(5);
                _itoa_s(defaultProxy.port, buffer, 5, 10);
                port = buffer;
            }
            if (defaultProxy.user != NULL) {
                user = defaultProxy.user;
                if (defaultProxy.pass != NULL) {
                    pass = defaultProxy.pass;
                }
            }
        }
        ini.setString("ProxyType",  type);
        ini.setString("ProxyHost",  host);
        ini.setString("ProxyPort",  port);
        ini.setString("ProxyUser",  user);
        ini.setString("ProxyPass",  pass);

        ini.setInteger("ConnectionTimeout", timeout);

        switch (resolve) {
        case RESOLVE_REMOTE:
            type = "remote";
            break;
        case RESOLVE_LOCAL:
            type = "local";
            break;
        default:
            type = "auto";
            break;
        }
        ini.setString("SocksResolve", type);

        ini.setString("TelnetHostnamePrompt",   prompt_table[0]);
        ini.setString("TelnetUsernamePrompt",   prompt_table[1]);
        ini.setString("TelnetPasswordPrompt",   prompt_table[2]);
        ini.setString("TelnetConnectedMessage", prompt_table[3]);
        ini.setString("TelnetErrorMessage",     prompt_table[4]);

        ini.setString("DebugLog", logfile);
    }
public:
    static void setOwner(HWND owner) {
        instance().owner = owner;
    }
    static void setMessageShower(MessageShower* shower) {
        instance().shower = shower;
    }
    static void load(IniFile& ini) {
        instance()._load(ini);
    }
    static void save(IniFile& ini) {
        instance()._save(ini);
    }
    static bool setupDialog(HWND owner) {
        SettingDialog dlg;
        dlg.proxy = instance().defaultProxy;
        if (dlg.open(owner) == IDOK) {
            instance().defaultProxy = dlg.proxy;
            return true;
        }
        return false;
    }
    static bool setupDialog(HWND owner, LCID lcid) {
        SettingDialog dlg;
        dlg.proxy = instance().defaultProxy;
        if (dlg.open(owner, lcid) == IDOK) {
            instance().defaultProxy = dlg.proxy;
            return true;
        }
        return false;
    }
    static bool aboutDialog(HWND owner, LCID lcid) {
        AboutDialog dlg;
        if (dlg.open(owner, lcid) == IDOK) {
            return true;
        }
        return false;
    }


    static void setupHooks() {
        SETUP_HOOKAPI(connect)
        SETUP_HOOKAPI(gethostbyname)
        SETUP_HOOKAPI(WSAAsyncGetHostByName)
        SETUP_HOOKAPI(WSAAsyncSelect)
        SETUP_HOOKAPI(WSACancelAsyncRequest)
        SETUP_HOOKAPI(send)
        SETUP_HOOKAPI(sendto)
        SETUP_HOOKAPI(recv)
        SETUP_HOOKAPI(recvfrom)
        SETUP_HOOKAPI(closesocket)
    }
    static void installHook(HMODULE module) {
        INSTALL_HOOKAPI(connect)
        INSTALL_HOOKAPI(gethostbyname)
        INSTALL_HOOKAPI(WSAAsyncGetHostByName)
        INSTALL_HOOKAPI(WSAAsyncSelect)
        INSTALL_HOOKAPI(WSACancelAsyncRequest)
        INSTALL_HOOKAPI(send)
        INSTALL_HOOKAPI(sendto)
        INSTALL_HOOKAPI(recv)
        INSTALL_HOOKAPI(recvfrom)
        INSTALL_HOOKAPI(closesocket)
    }

    static void uninstallHook(HMODULE module) {
        UNINSTALL_HOOKAPI(connect)
        UNINSTALL_HOOKAPI(gethostbyname)
        UNINSTALL_HOOKAPI(WSAAsyncGetHostByName)
        UNINSTALL_HOOKAPI(WSAAsyncSelect)
        UNINSTALL_HOOKAPI(WSACancelAsyncRequest)
        UNINSTALL_HOOKAPI(send)
        UNINSTALL_HOOKAPI(sendto)
        UNINSTALL_HOOKAPI(recv)
        UNINSTALL_HOOKAPI(recvfrom)
        UNINSTALL_HOOKAPI(closesocket)
    }
    static String generateURL() {
        return instance().defaultProxy.generateURL();
    }
        static String parseURL(const char* url, BOOL prefix) {
        ProxyInfo proxy;
        String realhost = ProxyInfo::parse(url, proxy);
        if (realhost != NULL) {
                        if (realhost.indexOf("://") != -1 && !prefix) {
                                proxy.type = proxy.TYPE_NONE;
                        }
            instance().defaultProxy = proxy;
            if (realhost.length() == 0)
                realhost = NULL;
        }
        return realhost;
    }
    static void setResourceModule(HMODULE module) {
        instance().resource_module = module;
    }
};

#endif//_YEBISOCKS_PROXYWSOCKHOOK_H_