Added Makefile for tests for Darwin platform.

[stg.git] / stglibs / srvconf.lib / netunit.cpp

diff --git a/stglibs/srvconf.lib/netunit.cpp b/stglibs/srvconf.lib/netunit.cpp
index db22a3a0ee27fb0bd136759fcae241d393144994..24d7ae770e60d1662f4d1573ae4ca7e339c39c88 100644 (file)
--- a/stglibs/srvconf.lib/netunit.cpp
+++ b/stglibs/srvconf.lib/netunit.cpp
@@ -18,31 +18,49 @@
  *    Author : Boris Mikhailenko <stg34@stargazer.dp.ua>
  */
 
  *    Author : Boris Mikhailenko <stg34@stargazer.dp.ua>
  */
 

- /*
- $Revision: 1.6 $
- $Date: 2009/02/06 10:25:54 $
- $Author: faust $
- */
-
-//---------------------------------------------------------------------------
+#include "netunit.h"

 
 

-#include "stg/netunit.h"
+#include "stg/servconf_types.h"

 #include "stg/common.h"
 #include "stg/common.h"

+#include "stg/blowfish.h"
+#include "stg/bfstream.h"
+
+#include <algorithm> // std::min

 
 

-#include <cstdio>

 #include <cerrno>
 #include <cstring>
 #include <cerrno>
 #include <cstring>

+#include <cassert>

 
 #include <netdb.h>
 #include <arpa/inet.h>
 #include <unistd.h>
 
 
 #include <netdb.h>
 #include <arpa/inet.h>
 #include <unistd.h>
 

+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+using namespace STG;
+
+namespace
+{
+
+struct ReadState
+{
+    bool final;
+    NETTRANSACT::CALLBACK callback;
+    void * callbackData;
+    NETTRANSACT * nt;
+};
+
+}
+

 //---------------------------------------------------------------------------
 
 #define SEND_DATA_ERROR             "Send data error!"
 #define RECV_DATA_ANSWER_ERROR      "Recv data answer error!"
 #define UNKNOWN_ERROR               "Unknown error!"
 #define CONNECT_FAILED              "Connect failed!"
 //---------------------------------------------------------------------------
 
 #define SEND_DATA_ERROR             "Send data error!"
 #define RECV_DATA_ANSWER_ERROR      "Recv data answer error!"
 #define UNKNOWN_ERROR               "Unknown error!"
 #define CONNECT_FAILED              "Connect failed!"

+#define BIND_FAILED                 "Bind failed!"

 #define INCORRECT_LOGIN             "Incorrect login!"
 #define INCORRECT_HEADER            "Incorrect header!"
 #define SEND_LOGIN_ERROR            "Send login error!"
 #define INCORRECT_LOGIN             "Incorrect login!"
 #define INCORRECT_HEADER            "Incorrect header!"
 #define SEND_LOGIN_ERROR            "Send login error!"


@@ -57,151 +75,149 @@ NETTRANSACT::NETTRANSACT(const std::string & s, uint16_t p,
                          const std::string & l, const std::string & pwd)
     : server(s),
       port(p),
                          const std::string & l, const std::string & pwd)
     : server(s),
       port(p),

+      localPort(0),

       login(l),
       password(pwd),
       login(l),
       password(pwd),

-      outerSocket(-1),
-      RxCallBack(NULL),
-      dataRxCallBack(NULL)
+      sock(-1)

 {
 }
 {
 }

-//-----------------------------------------------------------------------------
-void NETTRANSACT::EnDecryptInit(const char * passwd, int, BLOWFISH_CTX *ctx)
-{
-unsigned char * keyL = NULL;
-
-keyL = new unsigned char[PASSWD_LEN];
-
-memset(keyL, 0, PASSWD_LEN);
-
-strncpy((char *)keyL, passwd, PASSWD_LEN);
-
-Blowfish_Init(ctx, keyL, PASSWD_LEN);
-
-delete[] keyL;
-}
-//-----------------------------------------------------------------------------
-void NETTRANSACT::Encrypt(char * d, const char * s, BLOWFISH_CTX *ctx)
+//---------------------------------------------------------------------------
+NETTRANSACT::NETTRANSACT(const std::string & s, uint16_t p,
+                         const std::string & la, uint16_t lp,
+                         const std::string & l, const std::string & pwd)
+    : server(s),
+      port(p),
+      localAddress(la),
+      localPort(lp),
+      login(l),
+      password(pwd),
+      sock(-1)

 {
 {

-EncodeString(d, s, ctx);

 }
 //---------------------------------------------------------------------------
 }
 //---------------------------------------------------------------------------

-void NETTRANSACT::Decrypt(char * d, const char * s, BLOWFISH_CTX *ctx)
+NETTRANSACT::~NETTRANSACT()

 {
 {

-DecodeString(d, s, ctx);
+Disconnect();

 }
 //---------------------------------------------------------------------------
 int NETTRANSACT::Connect()
 {
 }
 //---------------------------------------------------------------------------
 int NETTRANSACT::Connect()
 {

-int ret;
-
-outerSocket = socket(PF_INET, SOCK_STREAM, 0);
-if (outerSocket < 0)
+sock = socket(PF_INET, SOCK_STREAM, 0);
+if (sock < 0)

     {
     errorMsg = CREATE_SOCKET_ERROR;
     return st_conn_fail;
     }
 
     {
     errorMsg = CREATE_SOCKET_ERROR;
     return st_conn_fail;
     }
 

+if (!localAddress.empty())
+    {
+    if (localPort == 0)
+        localPort = port;
+
+    unsigned long ip = inet_addr(localAddress.c_str());
+
+    if (ip == INADDR_NONE)
+        {
+        struct hostent * phe = gethostbyname(localAddress.c_str());
+        if (phe == NULL)
+            {
+            errorMsg = "Can not reslove '" + localAddress + "'";
+            return st_dns_err;
+            }
+
+        struct hostent he;
+        memcpy(&he, phe, sizeof(he));
+        ip = *((long *)he.h_addr_list[0]);
+        }
+
+    struct sockaddr_in localAddr;
+    memset(&localAddr, 0, sizeof(localAddr));
+    localAddr.sin_family = AF_INET;
+    localAddr.sin_port = htons(localPort);
+    localAddr.sin_addr.s_addr = ip;
+
+    if (bind(sock, (struct sockaddr *)&localAddr, sizeof(localAddr)) < 0)
+        {
+        errorMsg = BIND_FAILED;
+        return st_conn_fail;
+        }
+    }
+

 struct sockaddr_in outerAddr;
 memset(&outerAddr, 0, sizeof(outerAddr));
 
 struct sockaddr_in outerAddr;
 memset(&outerAddr, 0, sizeof(outerAddr));
 

-struct hostent he;
-struct hostent * phe;
-
-unsigned long ip;
-ip = inet_addr(server.c_str());
+unsigned long ip = inet_addr(server.c_str());

 
 if (ip == INADDR_NONE)
     {
 
 if (ip == INADDR_NONE)
     {

-    phe = gethostbyname(server.c_str());
+    struct hostent * phe = gethostbyname(server.c_str());

     if (phe == NULL)
         {
     if (phe == NULL)
         {

-        errorMsg = "DNS error.\nCan not reslove " + server;
+        errorMsg = "Can not reslove '" + server + "'";

         return st_dns_err;
         }
 
         return st_dns_err;
         }
 

+    struct hostent he;

     memcpy(&he, phe, sizeof(he));
     memcpy(&he, phe, sizeof(he));

-    ip = *((long*)he.h_addr_list[0]);
+    ip = *((long *)he.h_addr_list[0]);

     }
     }

+

 outerAddr.sin_family = AF_INET;
 outerAddr.sin_port = htons(port);
 outerAddr.sin_addr.s_addr = ip;
 
 outerAddr.sin_family = AF_INET;
 outerAddr.sin_port = htons(port);
 outerAddr.sin_addr.s_addr = ip;
 

-ret = connect(outerSocket, (struct sockaddr*)&outerAddr, sizeof(outerAddr));
-
-if (ret < 0)
+if (connect(sock, (struct sockaddr *)&outerAddr, sizeof(outerAddr)) < 0)

     {
     errorMsg = CONNECT_FAILED;
     {
     errorMsg = CONNECT_FAILED;

-    close(outerSocket);

     return st_conn_fail;
     }
     return st_conn_fail;
     }

+

 return st_ok;
 }
 //---------------------------------------------------------------------------
 return st_ok;
 }
 //---------------------------------------------------------------------------

-int NETTRANSACT::Disconnect()
+void NETTRANSACT::Disconnect()

 {
 {

-close(outerSocket);
-return 0;
+if (sock != -1)
+    {
+    shutdown(sock, SHUT_RDWR);
+    close(sock);
+    sock = -1;
+    }

 }
 //---------------------------------------------------------------------------
 }
 //---------------------------------------------------------------------------

-int NETTRANSACT::Transact(const char * data)
+int NETTRANSACT::Transact(const std::string & request, CALLBACK callback, void * data)

 {
 int ret;
 if ((ret = TxHeader()) != st_ok)
 {
 int ret;
 if ((ret = TxHeader()) != st_ok)

-    {
-    Disconnect();

     return ret;
     return ret;

-    }

 
 if ((ret = RxHeaderAnswer()) != st_ok)
 
 if ((ret = RxHeaderAnswer()) != st_ok)

-    {
-    Disconnect();

     return ret;
     return ret;

-    }

 
 if ((ret = TxLogin()) != st_ok)
 
 if ((ret = TxLogin()) != st_ok)

-    {
-    Disconnect();

     return ret;
     return ret;

-    }

 
 if ((ret = RxLoginAnswer()) != st_ok)
 
 if ((ret = RxLoginAnswer()) != st_ok)

-    {
-    Disconnect();

     return ret;
     return ret;

-    }

 
 if ((ret = TxLoginS()) != st_ok)
 
 if ((ret = TxLoginS()) != st_ok)

-    {
-    Disconnect();

     return ret;
     return ret;

-    }

 
 if ((ret = RxLoginSAnswer()) != st_ok)
 
 if ((ret = RxLoginSAnswer()) != st_ok)

-    {
-    Disconnect();

     return ret;
     return ret;

-    }

 
 

-if ((ret = TxData(data)) != st_ok)
-    {
-    Disconnect();
+if ((ret = TxData(request)) != st_ok)

     return ret;
     return ret;

-    }

 
 

-if ((ret = RxDataAnswer()) != st_ok)
-    {
-    Disconnect();
+if ((ret = RxDataAnswer(callback, data)) != st_ok)

     return ret;
     return ret;

-    }

 
 return st_ok;
 }
 //---------------------------------------------------------------------------
 int NETTRANSACT::TxHeader()
 {
 
 return st_ok;
 }
 //---------------------------------------------------------------------------
 int NETTRANSACT::TxHeader()
 {

-int ret;
-ret = send(outerSocket, STG_HEADER, strlen(STG_HEADER), 0);
-if (ret <= 0)
+if (!WriteAll(sock, STG_HEADER, strlen(STG_HEADER)))

     {
     errorMsg = SEND_HEADER_ERROR;
     return st_send_fail;
     {
     errorMsg = SEND_HEADER_ERROR;
     return st_send_fail;


@@ -212,46 +228,36 @@ return st_ok;
 //---------------------------------------------------------------------------
 int NETTRANSACT::RxHeaderAnswer()
 {
 //---------------------------------------------------------------------------
 int NETTRANSACT::RxHeaderAnswer()
 {

-char buffer[sizeof(STG_HEADER)+1];
-int ret;
+char buffer[sizeof(STG_HEADER) + 1];

 
 

-ret = recv(outerSocket, buffer, strlen(OK_HEADER), 0);
-if (ret <= 0)
+if (!ReadAll(sock, buffer, strlen(OK_HEADER)))

     {
     {

-    printf("Receive header answer error: '%s'\n", strerror(errno));

     errorMsg = RECV_HEADER_ANSWER_ERROR;
     return st_recv_fail;
     }
 
 if (strncmp(OK_HEADER, buffer, strlen(OK_HEADER)) == 0)
     errorMsg = RECV_HEADER_ANSWER_ERROR;
     return st_recv_fail;
     }
 
 if (strncmp(OK_HEADER, buffer, strlen(OK_HEADER)) == 0)

-    {

     return st_ok;
     return st_ok;

+
+if (strncmp(ERR_HEADER, buffer, strlen(ERR_HEADER)) == 0)
+    {
+    errorMsg = INCORRECT_HEADER;
+    return st_header_err;

     }
 else
     {
     }
 else
     {

-    if (strncmp(ERR_HEADER, buffer, strlen(ERR_HEADER)) == 0)
-        {
-        errorMsg = INCORRECT_HEADER;
-        return st_header_err;
-        }
-    else
-        {
-        errorMsg = UNKNOWN_ERROR;
-        return st_unknown_err;
-        }
+    errorMsg = UNKNOWN_ERROR;
+    return st_unknown_err;

     }
 }
 //---------------------------------------------------------------------------
 int NETTRANSACT::TxLogin()
 {
     }
 }
 //---------------------------------------------------------------------------
 int NETTRANSACT::TxLogin()
 {

-char loginZ[ADM_LOGIN_LEN];
-int ret;
-
-memset(loginZ, 0, ADM_LOGIN_LEN);
+char loginZ[ADM_LOGIN_LEN + 1];
+memset(loginZ, 0, ADM_LOGIN_LEN + 1);

 strncpy(loginZ, login.c_str(), ADM_LOGIN_LEN);
 strncpy(loginZ, login.c_str(), ADM_LOGIN_LEN);

-ret = send(outerSocket, loginZ, ADM_LOGIN_LEN, 0);

 
 

-if (ret <= 0)
+if (!WriteAll(sock, loginZ, ADM_LOGIN_LEN))

     {
     errorMsg = SEND_LOGIN_ERROR;
     return st_send_fail;
     {
     errorMsg = SEND_LOGIN_ERROR;
     return st_send_fail;


@@ -262,57 +268,41 @@ return st_ok;
 //---------------------------------------------------------------------------
 int NETTRANSACT::RxLoginAnswer()
 {
 //---------------------------------------------------------------------------
 int NETTRANSACT::RxLoginAnswer()
 {

-char buffer[sizeof(OK_LOGIN)+1];
-int ret;
+char buffer[sizeof(OK_LOGIN) + 1];

 
 

-ret = recv(outerSocket, buffer, strlen(OK_LOGIN), 0);
-if (ret <= 0)
+if (!ReadAll(sock, buffer, strlen(OK_LOGIN)))

     {
     {

-    printf("Receive login answer error: '%s'\n", strerror(errno));

     errorMsg = RECV_LOGIN_ANSWER_ERROR;
     return st_recv_fail;
     }
 
 if (strncmp(OK_LOGIN, buffer, strlen(OK_LOGIN)) == 0)
     errorMsg = RECV_LOGIN_ANSWER_ERROR;
     return st_recv_fail;
     }
 
 if (strncmp(OK_LOGIN, buffer, strlen(OK_LOGIN)) == 0)

-    {

     return st_ok;
     return st_ok;

+
+if (strncmp(ERR_LOGIN, buffer, strlen(ERR_LOGIN)) == 0)
+    {
+    errorMsg = INCORRECT_LOGIN;
+    return st_login_err;

     }
 else
     {
     }
 else
     {

-    if (strncmp(ERR_LOGIN, buffer, strlen(ERR_LOGIN)) == 0)
-        {
-        errorMsg = INCORRECT_LOGIN;
-        return st_login_err;
-        }
-    else
-        {
-        errorMsg = UNKNOWN_ERROR;
-        return st_unknown_err;
-        }
+    errorMsg = UNKNOWN_ERROR;
+    return st_unknown_err;

     }
 }
 //---------------------------------------------------------------------------
 int NETTRANSACT::TxLoginS()
 {
     }
 }
 //---------------------------------------------------------------------------
 int NETTRANSACT::TxLoginS()
 {

-char loginZ[ADM_LOGIN_LEN];
-char ct[ENC_MSG_LEN];
-int ret;
-
-memset(loginZ, 0, ADM_LOGIN_LEN);
-strncpy(loginZ, login.c_str(), ADM_LOGIN_LEN);
+char loginZ[ADM_LOGIN_LEN + 1];
+memset(loginZ, 0, ADM_LOGIN_LEN + 1);

 
 BLOWFISH_CTX ctx;
 
 BLOWFISH_CTX ctx;

-EnDecryptInit(password.c_str(), PASSWD_LEN, &ctx);
-
-for (int j = 0; j < ADM_LOGIN_LEN / ENC_MSG_LEN; j++)
+InitContext(password.c_str(), PASSWD_LEN, &ctx);
+EncryptString(loginZ, login.c_str(), std::min<size_t>(login.length() + 1, ADM_LOGIN_LEN), &ctx);
+if (!WriteAll(sock, loginZ, ADM_LOGIN_LEN))

     {
     {

-    Encrypt(ct, loginZ + j*ENC_MSG_LEN, &ctx);
-    ret = send(outerSocket, ct, ENC_MSG_LEN, 0);
-    if (ret <= 0)
-        {
-        errorMsg = SEND_LOGIN_ERROR;
-        return st_send_fail;
-        }
+    errorMsg = SEND_LOGIN_ERROR;
+    return st_send_fail;

     }
 
 return st_ok;
     }
 
 return st_ok;


@@ -320,70 +310,34 @@ return st_ok;
 //---------------------------------------------------------------------------
 int NETTRANSACT::RxLoginSAnswer()
 {
 //---------------------------------------------------------------------------
 int NETTRANSACT::RxLoginSAnswer()
 {

-char buffer[sizeof(OK_LOGINS)+1];
-int ret;
+char buffer[sizeof(OK_LOGINS) + 1];

 
 

-ret = recv(outerSocket, buffer, strlen(OK_LOGINS), 0);
-if (ret <= 0)
+if (!ReadAll(sock, buffer, strlen(OK_LOGINS)))

     {
     {

-    printf("Receive secret login answer error: '%s'\n", strerror(errno));

     errorMsg = RECV_LOGIN_ANSWER_ERROR;
     return st_recv_fail;
     }
 
 if (strncmp(OK_LOGINS, buffer, strlen(OK_LOGINS)) == 0)
     errorMsg = RECV_LOGIN_ANSWER_ERROR;
     return st_recv_fail;
     }
 
 if (strncmp(OK_LOGINS, buffer, strlen(OK_LOGINS)) == 0)

-    {

     return st_ok;
     return st_ok;

+
+if (strncmp(ERR_LOGINS, buffer, strlen(ERR_LOGINS)) == 0)
+    {
+    errorMsg = INCORRECT_LOGIN;
+    return st_logins_err;

     }
 else
     {
     }
 else
     {

-    if (strncmp(ERR_LOGINS, buffer, strlen(ERR_LOGINS)) == 0)
-        {
-        errorMsg = INCORRECT_LOGIN;
-        return st_logins_err;
-        }
-    else
-        {
-        errorMsg = UNKNOWN_ERROR;
-        return st_unknown_err;
-        }
+    errorMsg = UNKNOWN_ERROR;
+    return st_unknown_err;

     }
 }
 //---------------------------------------------------------------------------
     }
 }
 //---------------------------------------------------------------------------

-int NETTRANSACT::TxData(const char * text)
+int NETTRANSACT::TxData(const std::string & text)

 {
 {

-char textZ[ENC_MSG_LEN];
-char ct[ENC_MSG_LEN];
-int ret;
-int j;
-
-int n = strlen(text) / ENC_MSG_LEN;
-int r = strlen(text) % ENC_MSG_LEN;
-
-BLOWFISH_CTX ctx;
-EnDecryptInit(password.c_str(), PASSWD_LEN, &ctx);
-
-for (j = 0; j < n; j++)
-    {
-    strncpy(textZ, text + j*ENC_MSG_LEN, ENC_MSG_LEN);
-    Encrypt(ct, textZ, &ctx);
-    ret = send(outerSocket, ct, ENC_MSG_LEN, 0);
-    if (ret <= 0)
-        {
-        errorMsg = SEND_DATA_ERROR;
-        return st_send_fail;
-        }
-    }
-
-memset(textZ, 0, ENC_MSG_LEN);
-if (r)
-    strncpy(textZ, text + j*ENC_MSG_LEN, ENC_MSG_LEN);
-
-EnDecryptInit(password.c_str(), PASSWD_LEN, &ctx);
-
-Encrypt(ct, textZ, &ctx);
-ret = send(outerSocket, ct, ENC_MSG_LEN, 0);
-if (ret <= 0)
+STG::ENCRYPT_STREAM stream(password, TxCrypto, this);
+stream.Put(text.c_str(), text.length() + 1, true);
+if (!stream.IsOk())

     {
     errorMsg = SEND_DATA_ERROR;
     return st_send_fail;
     {
     errorMsg = SEND_DATA_ERROR;
     return st_send_fail;


@@ -392,92 +346,52 @@ if (ret <= 0)
 return st_ok;
 }
 //---------------------------------------------------------------------------
 return st_ok;
 }
 //---------------------------------------------------------------------------

-int NETTRANSACT::TxData(char * data)
-{
-char buff[ENC_MSG_LEN];
-char buffS[ENC_MSG_LEN];
-char passwd[ADM_PASSWD_LEN];
-
-memset(passwd, 0, ADM_PASSWD_LEN);
-strncpy(passwd, password.c_str(), ADM_PASSWD_LEN);
-memset(buff, 0, ENC_MSG_LEN);
-
-int l = strlen(data)/ENC_MSG_LEN;
-if (strlen(data)%ENC_MSG_LEN)
-    l++;
-
-BLOWFISH_CTX ctx;
-EnDecryptInit(passwd, PASSWD_LEN, &ctx);
-
-for (int j = 0; j < l; j++)
-    {
-    strncpy(buff, &data[j*ENC_MSG_LEN], ENC_MSG_LEN);
-    Encrypt(buffS, buff, &ctx);
-    send(outerSocket, buffS, ENC_MSG_LEN, 0);
-    }
-
-return 0;
-}
-//---------------------------------------------------------------------------
-int NETTRANSACT::RxDataAnswer()
+int NETTRANSACT::RxDataAnswer(CALLBACK callback, void * data)

 {
 {

-int n = 0;
-int ret;
-char bufferS[ENC_MSG_LEN];
-char buffer[ENC_MSG_LEN + 1];
-
-BLOWFISH_CTX ctx;
-EnDecryptInit(password.c_str(), PASSWD_LEN, &ctx);
-
-while (1)
+ReadState state = {false, callback, data, this};
+STG::DECRYPT_STREAM stream(password, RxCrypto, &state);
+while (!state.final)

     {
     {

-    ret = recv(outerSocket, &bufferS[n++], 1, 0);
-    if (ret <= 0)
+    char buffer[1024];
+    ssize_t res = read(sock, buffer, sizeof(buffer));
+    if (res < 0)

         {
         {

-        printf("Receive data error: '%s'\n", strerror(errno));
-        close(outerSocket);

         errorMsg = RECV_DATA_ANSWER_ERROR;
         return st_recv_fail;
         }
         errorMsg = RECV_DATA_ANSWER_ERROR;
         return st_recv_fail;
         }

-
-    if (n == ENC_MSG_LEN)
-        {
-        n = 0;
-        Decrypt(buffer, bufferS, &ctx);
-        buffer[ENC_MSG_LEN] = 0;
-
-        printf("%s", buffer);
-
-        answerList.push_back(buffer);
-
-        for (int j = 0; j < ENC_MSG_LEN; j++)
-            {
-            if (buffer[j] == 0)
-                {
-                printf("\n");
-                if (RxCallBack)
-                    if (st_ok != RxCallBack(dataRxCallBack, &answerList))
-                        return st_xml_parse_error;
-                return st_ok;
-                }
-            }
-        }
+    stream.Put(buffer, res, res == 0);
+    if (!stream.IsOk())
+        return st_xml_parse_error;

     }
     }

+
+return st_ok;

 }
 //---------------------------------------------------------------------------
 }
 //---------------------------------------------------------------------------

-void NETTRANSACT::SetRxCallback(void * data, RxCallback_t cb)
-{
-RxCallBack = cb;
-dataRxCallBack = data;
-}
-//---------------------------------------------------------------------------
-const std::string & NETTRANSACT::GetError() const
+bool NETTRANSACT::TxCrypto(const void * block, size_t size, void * data)

 {
 {

-return errorMsg;
+assert(data != NULL);
+NETTRANSACT & nt = *static_cast<NETTRANSACT *>(data);
+if (!WriteAll(nt.sock, block, size))
+    return false;
+return true;

 }
 //---------------------------------------------------------------------------
 }
 //---------------------------------------------------------------------------

-void NETTRANSACT::Reset()
+bool NETTRANSACT::RxCrypto(const void * block, size_t size, void * data)

 {
 {

-answerList.clear();
+assert(data != NULL);
+ReadState & state = *static_cast<ReadState *>(data);
+
+const char * buffer = static_cast<const char *>(block);
+for (size_t pos = 0; pos < size; ++pos)
+    if (buffer[pos] == 0)
+        {
+        state.final = true;
+        size = pos; // Adjust string size
+        }
+
+if (state.callback)
+    if (!state.callback(std::string(buffer, size), state.final, state.callbackData))
+        return false;
+
+return true;

 }
 }

-//---------------------------------------------------------------------------