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httpreadwrite.c

/*******************************************************************************
 *
 * Copyright (c) 2000-2003 Intel Corporation 
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met: 
 *
 * - Redistributions of source code must retain the above copyright notice, 
 * this list of conditions and the following disclaimer. 
 * - Redistributions in binary form must reproduce the above copyright notice, 
 * this list of conditions and the following disclaimer in the documentation 
 * and/or other materials provided with the distribution. 
 * - Neither name of Intel Corporation nor the names of its contributors 
 * may be used to endorse or promote products derived from this software 
 * without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 ******************************************************************************/


/************************************************************************
* Purpose: This file defines the functionality making use of the http 
* It defines functions to receive messages, process messages, send 
* messages
************************************************************************/


#include "config.h"


#include "httpreadwrite.h"


#include "unixutil.h"
#include "upnp.h"
#include "upnpapi.h"
#include "membuffer.h"
#include "uri.h"
#include "statcodes.h"
#include "sock.h"
#include "webserver.h"


#include <assert.h>
#include <stdarg.h>


#ifndef UPNP_USE_BCBPP
      #ifndef UPNP_USE_MSVCPP
            #include <inttypes.h>
            #include <stdint.h>
      #endif
#endif


#ifdef WIN32
      #include <winsock2.h>
      #include <malloc.h>
#else
      #include <arpa/inet.h>
      #include <fcntl.h>
      #include <netinet/in.h>
      #include <sys/types.h>
      #include <sys/socket.h>
      #include <sys/time.h>
      #include <sys/wait.h>
      #include <unistd.h>
      #include <sys/utsname.h>
#endif


/* 
 * Please, do not change these to const int while MSVC cannot understand
 * const int in array dimensions.
 */
/*
const int CHUNK_HEADER_SIZE = 10;
const int CHUNK_TAIL_SIZE = 10;
*/
#define CHUNK_HEADER_SIZE 10
#define CHUNK_TAIL_SIZE 10


/************************************************************************
 * Function: http_FixUrl
 *
 * Parameters:
 *    IN uri_type* url;       URL to be validated and fixed
 *    OUT uri_type* fixed_url;      URL after being fixed.
 *
 * Description:
 *    Validates URL
 *
 * Returns:
 *     UPNP_E_INVALID_URL
 *     UPNP_E_SUCCESS
 ************************************************************************/
int
http_FixUrl( IN uri_type * url,
             OUT uri_type * fixed_url )
{
    char *temp_path = "/";

    *fixed_url = *url;

    if( token_string_casecmp( &fixed_url->scheme, "http" ) != 0 ) {
        return UPNP_E_INVALID_URL;
    }

    if( fixed_url->hostport.text.size == 0 ) {
        return UPNP_E_INVALID_URL;
    }
    // set pathquery to "/" if it is empty
    if( fixed_url->pathquery.size == 0 ) {
        fixed_url->pathquery.buff = temp_path;
        fixed_url->pathquery.size = 1;
    }

    return UPNP_E_SUCCESS;
}


/************************************************************************
 * Function: http_FixStrUrl
 *
 * Parameters:
 *    IN const char* urlstr;        Character string as a URL
 *    IN int urlstrlen;       Length of the character string
 *    OUT uri_type* fixed_url;      Fixed and corrected URL
 *
 * Description:
 *    Parses URL and then validates URL
 *
 * Returns:
 *     UPNP_E_INVALID_URL
 *     UPNP_E_SUCCESS
 ************************************************************************/
int
http_FixStrUrl( IN const char *urlstr,
                IN int urlstrlen,
                OUT uri_type * fixed_url )
{
    uri_type url;

    if( parse_uri( urlstr, urlstrlen, &url ) != HTTP_SUCCESS ) {
        return UPNP_E_INVALID_URL;
    }

    return http_FixUrl( &url, fixed_url );
}


/************************************************************************
 * Function: http_Connect
 *
 * Parameters:
 *    IN uri_type* destination_url; URL containing destination information
 *    OUT uri_type *url;            Fixed and corrected URL
 *
 * Description:
 *    Gets destination address from URL and then connects to the remote end
 *
 *  Returns:
 *    socket descriptor on sucess
 *    UPNP_E_OUTOF_SOCKET
 *    UPNP_E_SOCKET_CONNECT on error
 ************************************************************************/
int
http_Connect( IN uri_type * destination_url,
              OUT uri_type * url )
{
    int connfd;

    http_FixUrl( destination_url, url );

    connfd = socket( url->hostport.IPaddress.ss_family, SOCK_STREAM, 0 );
    if( connfd == -1 ) {
        return UPNP_E_OUTOF_SOCKET;
    }

    if( connect( connfd, ( struct sockaddr * )&url->hostport.IPaddress,
                 sizeof( url->hostport.IPaddress ) ) == -1 ) {
#ifdef WIN32
        UpnpPrintf(UPNP_CRITICAL, HTTP, __FILE__, __LINE__,
            "connect error: %d\n", WSAGetLastError());
#endif
        shutdown( connfd, SD_BOTH );
        UpnpCloseSocket( connfd );
        return UPNP_E_SOCKET_CONNECT;
    }

    return connfd;
}


/************************************************************************
 * Function: http_RecvMessage
 *
 * Parameters:
 *    IN SOCKINFO *info;                  Socket information object
 *    OUT http_parser_t* parser;          HTTP parser object
 *    IN http_method_t request_method;    HTTP request method
 *    IN OUT int* timeout_secs;           time out
 *    OUT int* http_error_code;           HTTP error code returned
 *
 * Description:
 *    Get the data on the socket and take actions based on the read data
 *    to modify the parser objects buffer. If an error is reported while
 *    parsing the data, the error code is passed in the http_errr_code
 *    parameter
 *
 * Returns:
 *     UPNP_E_BAD_HTTPMSG
 *     UPNP_E_SUCCESS
 ************************************************************************/
int
http_RecvMessage( IN SOCKINFO * info,
                  OUT http_parser_t * parser,
                  IN http_method_t request_method,
                  IN OUT int *timeout_secs,
                  OUT int *http_error_code )
{
    parse_status_t status;
    int num_read;
    xboolean ok_on_close = FALSE;
    char buf[2 * 1024];

    if( request_method == HTTPMETHOD_UNKNOWN ) {
        parser_request_init( parser );
    } else {
        parser_response_init( parser, request_method );
    }

    while( TRUE ) {
        num_read = sock_read( info, buf, sizeof( buf ), timeout_secs );
        if( num_read > 0 ) {
            // got data
            status = parser_append( parser, buf, num_read );

            if( status == PARSE_SUCCESS ) {
                UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
                    "<<< (RECVD) <<<\n%s\n-----------------\n",
                    parser->msg.msg.buf );
                    print_http_headers( &parser->msg );

                if( parser->content_length >
                    ( unsigned int )g_maxContentLength ) {
                    *http_error_code = HTTP_REQ_ENTITY_TOO_LARGE;
                    return UPNP_E_OUTOF_BOUNDS;
                }

                return 0;
            } else if( status == PARSE_FAILURE ) {
                *http_error_code = parser->http_error_code;
                return UPNP_E_BAD_HTTPMSG;
            } else if( status == PARSE_INCOMPLETE_ENTITY ) {
                // read until close
                ok_on_close = TRUE;
            } else if( status == PARSE_CONTINUE_1 ) //Web post request. murari
            {
                return PARSE_SUCCESS;
            }
        } else if( num_read == 0 ) {
            if( ok_on_close ) {
                UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
                    "<<< (RECVD) <<<\n%s\n-----------------\n",
                    parser->msg.msg.buf );
                    print_http_headers( &parser->msg );

                    return 0;
            } else {
                // partial msg
                *http_error_code = HTTP_BAD_REQUEST;    // or response
                return UPNP_E_BAD_HTTPMSG;
            }
        } else {
            *http_error_code = parser->http_error_code;
            return num_read;
        }
    }
}


/************************************************************************
 * Function: http_SendMessage
 *
 * Parameters:
 *    IN SOCKINFO *info ;           Socket information object
 *    IN OUT int * TimeOut ;        time out value
 *    IN const char* fmt, ...  Pattern format to take actions upon
 *
 * Description:
 *    Sends a message to the destination based on the
 *    IN const char* fmt parameter
 *    fmt types:
 *          'f':  arg = const char * file name
 *          'm':  arg1 = const char * mem_buffer; arg2= size_t buf_length
 *    E.g.:
 *          char *buf = "POST /xyz.cgi http/1.1\r\n\r\n";
 *          char *filename = "foo.dat";
 *          int status = http_SendMessage( tcpsock, "mf",
 *                buf, strlen(buf), // args for memory buffer
 *                filename );       // arg for file
 *
 * Returns:
 *    UPNP_E_OUTOF_MEMORY
 *    UPNP_E_FILE_READ_ERROR
 *    UPNP_E_SUCCESS
 ************************************************************************/
int
http_SendMessage( IN SOCKINFO * info,
                  IN OUT int *TimeOut,
                  IN const char *fmt,
                  ... )
{
    char c;
    char *buf = NULL;
    size_t buf_length;
    char *filename = NULL;
    FILE *Fp;
    int num_read;
    int num_written;
    off_t amount_to_be_read = 0;
    va_list argp;
    char *file_buf = NULL;
    char *ChunkBuf = NULL;
    struct SendInstruction *Instr = NULL;
    char Chunk_Header[CHUNK_HEADER_SIZE];
    int RetVal = 0;

    // 10 byte allocated for chunk header.
    int Data_Buf_Size = WEB_SERVER_BUF_SIZE;

    va_start( argp, fmt );

    while( ( c = *fmt++ ) != 0 ) {
        if( c == 'I' ) {
            Instr = va_arg(argp, struct SendInstruction *);

            assert( Instr );

            if( Instr->ReadSendSize >= 0 ) {
                amount_to_be_read = Instr->ReadSendSize;
            } else {
                amount_to_be_read = Data_Buf_Size;
            }

            if( amount_to_be_read < WEB_SERVER_BUF_SIZE ) {
                Data_Buf_Size = amount_to_be_read;
            }

            ChunkBuf = (char *)malloc(
                Data_Buf_Size + CHUNK_HEADER_SIZE + CHUNK_TAIL_SIZE);
            if( !ChunkBuf ) {
                return UPNP_E_OUTOF_MEMORY;
            }

            file_buf = ChunkBuf + CHUNK_HEADER_SIZE;
        } else if( c == 'f' ) {
            // file name
            filename = va_arg(argp, char *);
            if( Instr && Instr->IsVirtualFile ) {
                Fp = (virtualDirCallback.open)( filename, UPNP_READ );
            } else  {
                Fp = fopen( filename, "rb" );
            }
            if( Fp == NULL ) {
                free( ChunkBuf );
                return UPNP_E_FILE_READ_ERROR;
            }

            if( Instr && Instr->IsRangeActive && Instr->IsVirtualFile ) {
                if( virtualDirCallback.seek( Fp, Instr->RangeOffset,
                                             SEEK_CUR ) != 0 ) {
                    free( ChunkBuf );
                    return UPNP_E_FILE_READ_ERROR;
                }
            } else if( Instr && Instr->IsRangeActive ) {
                if( fseeko( Fp, Instr->RangeOffset, SEEK_CUR ) != 0 ) {
                    free( ChunkBuf );
                    return UPNP_E_FILE_READ_ERROR;
                }
            }

            while( amount_to_be_read ) {
                if( Instr ) {
                    int n = (amount_to_be_read >= Data_Buf_Size) ?
                        Data_Buf_Size : amount_to_be_read;
                    if( Instr->IsVirtualFile ) {
                        num_read = virtualDirCallback.read( Fp, file_buf, n );
                    } else {
                        num_read = fread( file_buf, 1, n, Fp );
                    }
                    amount_to_be_read = amount_to_be_read - num_read;
                    if( Instr->ReadSendSize < 0 ) {
                        // read until close
                        amount_to_be_read = Data_Buf_Size;
                    }
                } else {
                    num_read = fread( file_buf, 1, Data_Buf_Size, Fp );
                }

                if( num_read == 0 ) {
                    // EOF so no more to send.
                    if( Instr && Instr->IsChunkActive ) {
                        char *str = "0\r\n\r\n";
                        num_written = sock_write(info, str, strlen(str), TimeOut);
                    } else {
                        RetVal = UPNP_E_FILE_READ_ERROR;
                    }
                    goto Cleanup_File;
                }
                // Create chunk for the current buffer.
                if( Instr && Instr->IsChunkActive ) {
                    // Copy CRLF at the end of the chunk
                    memcpy( file_buf + num_read, "\r\n", 2 );

                    // Hex length for the chunk size.
                    sprintf( Chunk_Header, "%x", num_read );

                    //itoa(num_read,Chunk_Header,16); 
                    strcat( Chunk_Header, "\r\n" );

                    // Copy the chunk size header 
                    memcpy( file_buf - strlen( Chunk_Header ),
                            Chunk_Header, strlen( Chunk_Header ) );

                    // on the top of the buffer.
                    //file_buf[num_read+strlen(Chunk_Header)] = NULL;
                    //printf("Sending %s\n",file_buf-strlen(Chunk_Header));
                    num_written = sock_write(
                        info, file_buf - strlen( Chunk_Header ),
                        num_read + strlen( Chunk_Header ) + 2, TimeOut );

                    if( num_written !=
                        num_read + ( int )strlen( Chunk_Header ) + 2 ) {
                        // Send error nothing we can do.
                        goto Cleanup_File;
                    }
                } else {
                    // write data
                    num_written = sock_write( info, file_buf, num_read, TimeOut );
                    UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
                        ">>> (SENT) >>>\n%.*s\n------------\n",
                        ( int )num_written, file_buf );
                    // Send error nothing we can do
                    if( num_written != num_read ) {
                        goto Cleanup_File;
                    }
                }
            } // while
Cleanup_File:
            va_end( argp );
            if( Instr && Instr->IsVirtualFile ) {
                virtualDirCallback.close( Fp );
          } else {
                fclose( Fp );
          }
            free( ChunkBuf );
            return RetVal;

        } else if( c == 'b' ) {
            // memory buffer
            buf = va_arg(argp, char *);
            buf_length = va_arg(argp, size_t);
            if( buf_length > 0 ) {
                num_written = sock_write( info, buf, buf_length, TimeOut );
                UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
                    ">>> (SENT) >>>\n"
                "%.*s\nbuf_length=%d, num_written=%d\n"
                "------------\n",
                    (int)buf_length, buf, (int)buf_length, num_written );
                if( (size_t)num_written != buf_length ) {
                    goto end;
            }
            }
        }
    }

end:
    va_end( argp );
    free( ChunkBuf );
    return 0;
}


/************************************************************************
 * Function: http_RequestAndResponse
 *
 * Parameters:
 *    IN uri_type* destination;     Destination URI object which contains
 *                            remote IP address among other elements
 *    IN const char* request;       Request to be sent
 *    IN size_t request_length;     Length of the request
 *    IN http_method_t req_method;  HTTP Request method
 *    IN int timeout_secs;          time out value
 *    OUT http_parser_t* response;  Parser object to receive the repsonse
 *
 * Description:
 *    Initiates socket, connects to the destination, sends a
 *    request and waits for the response from the remote end
 *
 * Returns:
 *    UPNP_E_SOCKET_ERROR
 *    UPNP_E_SOCKET_CONNECT
 *    Error Codes returned by http_SendMessage
 *    Error Codes returned by http_RecvMessage
 ************************************************************************/
int
http_RequestAndResponse( IN uri_type * destination,
                         IN const char *request,
                         IN size_t request_length,
                         IN http_method_t req_method,
                         IN int timeout_secs,
                         OUT http_parser_t * response )
{
    int tcp_connection;
    int ret_code;
    int http_error_code;
    SOCKINFO info;

    tcp_connection = socket( destination->hostport.IPaddress.ss_family, SOCK_STREAM, 0 );
    if( tcp_connection == -1 ) {
        parser_response_init( response, req_method );
        return UPNP_E_SOCKET_ERROR;
    }
    if( sock_init( &info, tcp_connection ) != UPNP_E_SUCCESS )
    {
        sock_destroy( &info, SD_BOTH );
        parser_response_init( response, req_method );
        return UPNP_E_SOCKET_ERROR;
    }
    // connect
    ret_code = connect( info.socket,
                        ( struct sockaddr * )&destination->hostport.
                        IPaddress, sizeof( struct sockaddr_storage ) );

    if( ret_code == -1 ) {
        sock_destroy( &info, SD_BOTH );
        parser_response_init( response, req_method );
        return UPNP_E_SOCKET_CONNECT;
    }
    // send request
    ret_code = http_SendMessage( &info, &timeout_secs, "b",
                                 request, request_length );
    if( ret_code != 0 ) {
        sock_destroy( &info, SD_BOTH );
        parser_response_init( response, req_method );
        return ret_code;
    }
    // recv response
    ret_code = http_RecvMessage( &info, response, req_method,
                                 &timeout_secs, &http_error_code );

    sock_destroy( &info, SD_BOTH ); //should shutdown completely

    return ret_code;
}


/************************************************************************
 * Function: http_Download
 *
 * Parameters:
 *    IN const char* url_str; String as a URL
 *    IN int timeout_secs;    time out value
 *    OUT char** document;    buffer to store the document extracted
 *                      from the donloaded message.
 *    OUT int* doc_length;    length of the extracted document
 *    OUT char* content_type; Type of content
 *
 * Description:
 *    Download the document message and extract the document 
 *    from the message.
 *
 * Return: int
 *    UPNP_E_SUCCESS
 *    UPNP_E_INVALID_URL
 ************************************************************************/
int
http_Download( IN const char *url_str,
               IN int timeout_secs,
               OUT char **document,
               OUT int *doc_length,
               OUT char *content_type )
{
    int ret_code;
    uri_type url;
    char *msg_start;
    char *entity_start;
    char *hoststr;
    char *temp;
    http_parser_t response;
    size_t msg_length;
    size_t hostlen;
    memptr ctype;
    size_t copy_len;
    membuffer request;
    char *urlPath = alloca( strlen( url_str ) + 1 );

    //ret_code = parse_uri( (char*)url_str, strlen(url_str), &url );
    UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__, "DOWNLOAD URL : %s\n",
        url_str );
    ret_code =
        http_FixStrUrl( ( char * )url_str, strlen( url_str ), &url );
    if( ret_code != UPNP_E_SUCCESS ) {
        return ret_code;
    }
    // make msg
    membuffer_init( &request );

    strcpy( urlPath, url_str );
    hoststr = strstr( urlPath, "//" );
    if( hoststr == NULL ) {
        return UPNP_E_INVALID_URL;
    }

    hoststr += 2;
    temp = strchr( hoststr, '/' );
    if( temp == NULL ) {
        return UPNP_E_INVALID_URL;
    }

    *temp = '\0';
    hostlen = strlen( hoststr );
    *temp = '/';
    UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
        "HOSTNAME : %s Length : %"PRIzu"\n", hoststr, hostlen );

    ret_code = http_MakeMessage(
        &request, 1, 1,
        "Q" "s" "bcDCUc",
        HTTPMETHOD_GET, url.pathquery.buff, url.pathquery.size,
        "HOST: ",
        hoststr, hostlen );
    if( ret_code != 0 ) {
        UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
            "HTTP Makemessage failed\n" );
            membuffer_destroy( &request );
        return ret_code;
    }

    UpnpPrintf(UPNP_INFO, HTTP, __FILE__, __LINE__,
        "HTTP Buffer:\n%s\n" "----------END--------\n",
        request.buf);
    // get doc msg
    ret_code =
        http_RequestAndResponse( &url, request.buf, request.length,
                                 HTTPMETHOD_GET, timeout_secs, &response );

    if( ret_code != 0 ) {
        httpmsg_destroy( &response.msg );
        membuffer_destroy( &request );
        return ret_code;
    }

    UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__, "Response\n" );
    print_http_headers( &response.msg );

        // optional content-type
        if( content_type ) {
        if( httpmsg_find_hdr( &response.msg, HDR_CONTENT_TYPE, &ctype ) ==
            NULL ) {
            *content_type = '\0';   // no content-type
        } else {
            // safety
            copy_len = ctype.length < LINE_SIZE - 1 ?
                ctype.length : LINE_SIZE - 1;

            memcpy( content_type, ctype.buf, copy_len );
            content_type[copy_len] = '\0';
        }
    }
    //
    // extract doc from msg
    //

    if( ( *doc_length = ( int )response.msg.entity.length ) == 0 ) {
        // 0-length msg
        *document = NULL;
    } else if( response.msg.status_code == HTTP_OK ) {
        //LEAK_FIX_MK
        // copy entity
        entity_start = response.msg.entity.buf; // what we want
        msg_length = response.msg.msg.length;   // save for posterity   
        msg_start = membuffer_detach( &response.msg.msg );  // whole msg

        // move entity to the start; copy null-terminator too
        memmove( msg_start, entity_start, *doc_length + 1 );

        // save mem for body only
        *document = realloc( msg_start, *doc_length + 1 );  //LEAK_FIX_MK
        // *document = Realloc( msg_start,msg_length, *doc_length + 1 );//LEAK_FIX_MK

        // shrink can't fail
        assert( ( int )msg_length > *doc_length );
        assert( *document != NULL );
    }

    if( response.msg.status_code == HTTP_OK ) {
        ret_code = 0;           // success
    } else {
        // server sent error msg (not requested doc)
        ret_code = response.msg.status_code;
    }

    httpmsg_destroy( &response.msg );
    membuffer_destroy( &request );

    return ret_code;
}

typedef struct HTTPPOSTHANDLE {
    SOCKINFO sock_info;
    int contentLength;
} http_post_handle_t;

/************************************************************************
 * Function: MakePostMessage
 *
 * Parameters:
 *    const char *url_str;          String as a URL
 *    membuffer *request;           Buffer containing the request
 *    uri_type *url;                URI object containing the scheme,
 *                            path query token, etc.
 *    int contentLength;            length of content
 *    const char *contentType;      Type of content
 *
 * Description:
 *    Makes the message for the HTTP POST message
 *
 * Returns:
 *    UPNP_E_INVALID_URL
 *    UPNP_E_INVALID_PARAM
 *    UPNP_E_SUCCESS
 ************************************************************************/
int
MakePostMessage( const char *url_str,
                 membuffer * request,
                 uri_type * url,
                 int contentLength,
                 const char *contentType )
{
    int ret_code = 0;
    char *urlPath = alloca( strlen( url_str ) + 1 );
    size_t hostlen = 0;
    char *hoststr,
     *temp;

    UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
                         "DOWNLOAD URL : %s\n", url_str );
    ret_code =
        http_FixStrUrl( ( char * )url_str, strlen( url_str ), url );
    if( ret_code != UPNP_E_SUCCESS ) {
        return ret_code;
    }
    // make msg
    membuffer_init( request );

    strcpy( urlPath, url_str );
    hoststr = strstr( urlPath, "//" );
    if( hoststr == NULL ) {
        return UPNP_E_INVALID_URL;
    }

    hoststr += 2;
    temp = strchr( hoststr, '/' );
    if( temp == NULL ) {
        return UPNP_E_INVALID_URL;
    }

    *temp = '\0';
    hostlen = strlen( hoststr );
    *temp = '/';
    UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
        "HOSTNAME : %s Length : %"PRIzu"\n", hoststr, hostlen );

    if( contentLength >= 0 ) {
        ret_code = http_MakeMessage(
            request, 1, 1,
            "Q" "s" "bcDCU" "T" "Nc",
            HTTPMETHOD_POST, url->pathquery.buff, url->pathquery.size,
            "HOST: ",
          hoststr, hostlen,
            contentType,
            (off_t)contentLength );
    } else if( contentLength == UPNP_USING_CHUNKED ) {
        ret_code = http_MakeMessage(
            request, 1, 1,
            "Q" "s" "bcDCU" "TKc",
            HTTPMETHOD_POST, url->pathquery.buff, url->pathquery.size,
            "HOST: ",
          hoststr, hostlen,
            contentType );
    } else if( contentLength == UPNP_UNTIL_CLOSE ) {
        ret_code = http_MakeMessage(
            request, 1, 1,
            "Q" "s" "bcDCU" "Tc",
            HTTPMETHOD_POST, url->pathquery.buff, url->pathquery.size,
            "HOST: ",
          hoststr, hostlen,
            contentType );
    } else {
        ret_code = UPNP_E_INVALID_PARAM;
    }

    if( ret_code != 0 ) {
        UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
            "HTTP Makemessage failed\n" );
        membuffer_destroy( request );

        return ret_code;
    }

    UpnpPrintf(UPNP_INFO, HTTP, __FILE__, __LINE__,
        "HTTP Buffer:\n%s\n" "----------END--------\n",
        request->buf);

    return UPNP_E_SUCCESS;
}

/************************************************************************
 * Function: http_WriteHttpPost
 *
 * Parameters:
 *    IN void *Handle:  Handle to the http post object
 *    IN char *buf:           Buffer to send to peer, if format used
 *                      is not UPNP_USING_CHUNKED, 
 *    IN unsigned int *size:  Size of the data to be sent.
 *    IN int timeout:         time out value
 *
 * Description:
 *    Formats data if format used is UPNP_USING_CHUNKED.
 *    Writes data on the socket connected to the peer.
 *
 * Return: int
 *    UPNP_E_SUCCESS - On Success
 *    UPNP_E_INVALID_PARAM - Invalid Parameter
 *    -1 - On Socket Error.
 ************************************************************************/
int
http_WriteHttpPost( IN void *Handle,
                    IN char *buf,
                    IN unsigned int *size,
                    IN int timeout )
{
    http_post_handle_t *handle = ( http_post_handle_t * ) Handle;
    char *tempbuf = NULL;
    int tempbufSize = 0;
    int freeTempbuf = 0;
    int numWritten = 0;

    if( ( !handle ) || ( !size ) || ( ( ( *size ) > 0 ) && !buf )
        || ( ( *size ) < 0 ) ) {
        if(size) ( *size ) = 0;
        return UPNP_E_INVALID_PARAM;
    }
    if( handle->contentLength == UPNP_USING_CHUNKED ) {
        if( ( *size ) ) {
            int tempSize = 0;
            tempbuf = ( char * )malloc(
                *size + CHUNK_HEADER_SIZE + CHUNK_TAIL_SIZE );
            if ( tempbuf == NULL) {
                return UPNP_E_OUTOF_MEMORY;
            }

          // begin chunk
            sprintf( tempbuf, "%x\r\n", ( *size ) );
            tempSize = strlen( tempbuf );
            memcpy( tempbuf + tempSize, buf, ( *size ) );
            memcpy( tempbuf + tempSize + ( *size ), "\r\n", 2 );
            // end of chunk
            tempbufSize = tempSize + ( *size ) + 2;
            freeTempbuf = 1;
        }
    } else {
        tempbuf = buf;
        tempbufSize = ( *size );
    }

    numWritten =
        sock_write( &handle->sock_info, tempbuf, tempbufSize, &timeout );
    //(*size) = sock_write(&handle->sock_info,tempbuf,tempbufSize,&timeout);

    if( freeTempbuf ) {
        free( tempbuf );
    }
    if( numWritten < 0 ) {
        ( *size ) = 0;
        return numWritten;
    } else {
        ( *size ) = numWritten;
        return UPNP_E_SUCCESS;
    }
}

/************************************************************************
 * Function: http_CloseHttpPost
 *
 * Parameters:
 *    IN void *Handle;  Handle to the http post object
 *    IN OUT int *httpStatus; HTTP status returned on receiving a
 *                      response message
 *    IN int timeout;         time out value
 *
 * Description:
 *    Sends remaining data if using  UPNP_USING_CHUNKED 
 *    format. Receives any more messages. Destroys socket and any socket
 *    associated memory. Frees handle associated with the HTTP POST msg.
 *
 * Return: int
 *    UPNP_E_SUCCESS          - On Sucess
 *    UPNP_E_INVALID_PARAM    - Invalid Parameter
 ************************************************************************/
int
http_CloseHttpPost( IN void *Handle,
                    IN OUT int *httpStatus,
                    IN int timeout )
{
    int retc = 0;
    http_parser_t response;
    int http_error_code;

    http_post_handle_t *handle = Handle;

    if( ( !handle ) || ( !httpStatus ) ) {
        return UPNP_E_INVALID_PARAM;
    }

    if( handle->contentLength == UPNP_USING_CHUNKED ) {
        retc = sock_write( &handle->sock_info, "0\r\n\r\n", strlen( "0\r\n\r\n" ), &timeout );  //send last chunk
    }
    //read response
    parser_response_init( &response, HTTPMETHOD_POST );

    retc =
        http_RecvMessage( &handle->sock_info, &response, HTTPMETHOD_POST,
                          &timeout, &http_error_code );

    ( *httpStatus ) = http_error_code;

    sock_destroy( &handle->sock_info, SD_BOTH );    //should shutdown completely

    httpmsg_destroy( &response.msg );
    free( handle );

    return retc;
}

/************************************************************************
 * Function: http_OpenHttpPost
 *
 * Parameters:
 *    IN const char *url_str;       String as a URL   
 *    IN OUT void **Handle;         Pointer to buffer to store HTTP
 *                            post handle
 *    IN const char *contentType;   Type of content
 *    IN int contentLength;         length of content
 *    IN int timeout;               time out value
 *
 * Description:
 *    Makes the HTTP POST message, connects to the peer, 
 *    sends the HTTP POST request. Adds the post handle to buffer of 
 *    such handles
 *
 * Return : int;
 *    UPNP_E_SUCCESS          - On Sucess
 *    UPNP_E_INVALID_PARAM    - Invalid Parameter
 *    UPNP_E_OUTOF_MEMORY
 *    UPNP_E_SOCKET_ERROR
 *    UPNP_E_SOCKET_CONNECT
 ************************************************************************/
int
http_OpenHttpPost( IN const char *url_str,
                   IN OUT void **Handle,
                   IN const char *contentType,
                   IN int contentLength,
                   IN int timeout )
{
    int ret_code;
    int tcp_connection;
    membuffer request;
    http_post_handle_t *handle = NULL;
    uri_type url;

    if( ( !url_str ) || ( !Handle ) || ( !contentType ) ) {
        return UPNP_E_INVALID_PARAM;
    }

    ( *Handle ) = handle;

    if( ( ret_code =
          MakePostMessage( url_str, &request, &url, contentLength,
                           contentType ) ) != UPNP_E_SUCCESS ) {
        return ret_code;
    }

    handle =
        ( http_post_handle_t * ) malloc( sizeof( http_post_handle_t ) );

    if( handle == NULL ) {
        return UPNP_E_OUTOF_MEMORY;
    }

    handle->contentLength = contentLength;

    tcp_connection = socket( url.hostport.IPaddress.ss_family, SOCK_STREAM, 0 );
    if( tcp_connection == -1 ) {
        ret_code = UPNP_E_SOCKET_ERROR;
        goto errorHandler;
    }

    if( sock_init( &handle->sock_info, tcp_connection ) != UPNP_E_SUCCESS )
    {
        sock_destroy( &handle->sock_info, SD_BOTH );
        ret_code = UPNP_E_SOCKET_ERROR;
        goto errorHandler;
    }

    ret_code = connect( handle->sock_info.socket,
                        ( struct sockaddr * )&url.hostport.IPaddress,
                        sizeof( struct sockaddr_storage ) );

    if( ret_code == -1 ) {
        sock_destroy( &handle->sock_info, SD_BOTH );
        ret_code = UPNP_E_SOCKET_CONNECT;
        goto errorHandler;
    }
    // send request
    ret_code = http_SendMessage( &handle->sock_info, &timeout, "b",
                                 request.buf, request.length );
    if( ret_code != 0 ) {
        sock_destroy( &handle->sock_info, SD_BOTH );
    }

  errorHandler:
    membuffer_destroy( &request );
    ( *Handle ) = handle;
    return ret_code;
}

typedef struct HTTPGETHANDLE {
    http_parser_t response;
    SOCKINFO sock_info;
    int entity_offset;
    int cancel;
} http_get_handle_t;

/************************************************************************
* Function: MakeGetMessage
*
* Parameters:
*     const char *url_str ;   String as a URL
*     const char *proxy_str ; String as a URL of proxy to use
*     membuffer *request ;    Buffer containing the request
*     uri_type *url ;   URI object containing the scheme, path 
*                       query token, etc.
*
* Description:
*     Makes the message for the HTTP GET method
*
* Returns:
*     UPNP_E_INVALID_URL
*     Error Codes returned by http_MakeMessage
*     UPNP_E_SUCCESS
************************************************************************/
int
MakeGetMessage( const char *url_str,
                const char *proxy_str,
                membuffer * request,
                uri_type * url )
{
    int ret_code;
    char *urlPath = alloca( strlen( url_str ) + 1 );
    size_t querylen = 0;
    const char *querystr;
    size_t hostlen = 0;
    char *hoststr,
     *temp;

    UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
        "DOWNLOAD URL : %s\n", url_str );

    ret_code =
        http_FixStrUrl( ( char * )url_str, strlen( url_str ), url );

    if( ret_code != UPNP_E_SUCCESS ) {
        return ret_code;
    }
    // make msg
    membuffer_init( request );

    strcpy( urlPath, url_str );
    hoststr = strstr( urlPath, "//" );
    if( hoststr == NULL ) {
        return UPNP_E_INVALID_URL;
    }

    hoststr += 2;
    temp = strchr( hoststr, '/' );
    if( temp == NULL ) {
        return UPNP_E_INVALID_URL;
    }

    *temp = '\0';
    hostlen = strlen( hoststr );
    *temp = '/';
    UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
        "HOSTNAME : %s Length : %"PRIzu"\n", hoststr, hostlen );

    if( proxy_str ) {
        querystr = url_str;
        querylen = strlen( querystr );
    } else {
        querystr = url->pathquery.buff;
        querylen = url->pathquery.size;
    }

    ret_code = http_MakeMessage(
        request, 1, 1,
        "Q" "s" "bcDCUc",
        HTTPMETHOD_GET, querystr, querylen,
        "HOST: ",
        hoststr, hostlen );

    if( ret_code != 0 ) {
        UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
            "HTTP Makemessage failed\n" );
        membuffer_destroy( request );

        return ret_code;
    }

    UpnpPrintf(UPNP_INFO, HTTP, __FILE__, __LINE__,
        "HTTP Buffer:\n%s\n" "----------END--------\n",
        request->buf);

    return UPNP_E_SUCCESS;
}

/************************************************************************
 * Function: ReadResponseLineAndHeaders
 *
 * Parameters:
 *    IN SOCKINFO *info;            Socket information object
 *    IN OUT http_parser_t *parser; HTTP Parser object
 *    IN OUT int *timeout_secs;     time out value
 *    IN OUT int *http_error_code;  HTTP errror code returned
 *
 * Description:
 *    Parses already exiting data. If not complete reads more 
 *    data on the connected socket. The read data is then parsed. The 
 *    same methid is carried out for headers.
 *
 * Return: int
 *    PARSE_OK - On Success
 *    PARSE_FAILURE - Failure to parse data correctly
 *    UPNP_E_BAD_HTTPMSG - Socker read() returns an error
 ************************************************************************/
int
ReadResponseLineAndHeaders( IN SOCKINFO * info,
                            IN OUT http_parser_t * parser,
                            IN OUT int *timeout_secs,
                            IN OUT int *http_error_code )
{
    parse_status_t status;
    int num_read;
    char buf[2 * 1024];
    int done = 0;
    int ret_code = 0;

    //read response line

    status = parser_parse_responseline( parser );
    if( status == PARSE_OK ) {
        done = 1;
    } else if( status == PARSE_INCOMPLETE ) {
        done = 0;
    } else {
        //error
        return status;
    }

    while( !done ) {
        num_read = sock_read( info, buf, sizeof( buf ), timeout_secs );
        if( num_read > 0 ) {
            // append data to buffer
            ret_code = membuffer_append( &parser->msg.msg, buf, num_read );
            if( ret_code != 0 ) {
                // set failure status
                parser->http_error_code = HTTP_INTERNAL_SERVER_ERROR;
                return PARSE_FAILURE;
            }
            status = parser_parse_responseline( parser );
            if( status == PARSE_OK ) {
                done = 1;
            } else if( status == PARSE_INCOMPLETE ) {
                done = 0;
            } else {
                //error
                return status;
            }
        } else if( num_read == 0 ) {

            // partial msg
            *http_error_code = HTTP_BAD_REQUEST;    // or response
            return UPNP_E_BAD_HTTPMSG;

        } else {
            *http_error_code = parser->http_error_code;
            return num_read;
        }
    }

    done = 0;

    status = parser_parse_headers( parser );
    if( ( status == PARSE_OK ) && ( parser->position == POS_ENTITY ) ) {

        done = 1;
    } else if( status == PARSE_INCOMPLETE ) {
        done = 0;
    } else {
        //error
        return status;
    }

    //read headers
    while( !done ) {
        num_read = sock_read( info, buf, sizeof( buf ), timeout_secs );
        if( num_read > 0 ) {
            // append data to buffer
            ret_code = membuffer_append( &parser->msg.msg, buf, num_read );
            if( ret_code != 0 ) {
                // set failure status
                parser->http_error_code = HTTP_INTERNAL_SERVER_ERROR;
                return PARSE_FAILURE;
            }
            status = parser_parse_headers( parser );
            if( ( status == PARSE_OK )
                && ( parser->position == POS_ENTITY ) ) {

                done = 1;
            } else if( status == PARSE_INCOMPLETE ) {
                done = 0;
            } else {
                //error
                return status;
            }
        } else if( num_read == 0 ) {

            // partial msg
            *http_error_code = HTTP_BAD_REQUEST;    // or response
            return UPNP_E_BAD_HTTPMSG;

        } else {
            *http_error_code = parser->http_error_code;
            return num_read;
        }
    }

    return PARSE_OK;
}

/************************************************************************
 * Function: http_ReadHttpGet
 *
 * Parameters:
 *    IN void *Handle;        Handle to the HTTP get object
 *    IN OUT char *buf;       Buffer to get the read and parsed data
 *    IN OUT unsigned int *size;    Size of the buffer passed
 *    IN int timeout;               time out value
 *
 * Description:
 *    Parses already existing data, then gets new data.
 *    Parses and extracts information from the new data.
 *
 * Return: int
 *    UPNP_E_SUCCESS          - On Sucess
 *    UPNP_E_INVALID_PARAM    - Invalid Parameter
 *    UPNP_E_BAD_RESPONSE
 *    UPNP_E_BAD_HTTPMSG
 *    UPNP_E_CANCELED
 ************************************************************************/
int
http_ReadHttpGet( IN void *Handle,
                  IN OUT char *buf,
                  IN OUT unsigned int *size,
                  IN int timeout )
{
    http_get_handle_t *handle = Handle;

    parse_status_t status;
    int num_read;
    xboolean ok_on_close = FALSE;
    char tempbuf[2 * 1024];

    int ret_code = 0;

    if( ( !handle ) || ( !size ) || ( ( ( *size ) > 0 ) && !buf )
        || ( ( *size ) < 0 ) ) {
        if(size) ( *size ) = 0;
        return UPNP_E_INVALID_PARAM;
    }
    //first parse what has already been gotten
    if( handle->response.position != POS_COMPLETE ) {
        status = parser_parse_entity( &handle->response );
    } else {
        status = PARSE_SUCCESS;
    }

    if( status == PARSE_INCOMPLETE_ENTITY ) {
        // read until close
        ok_on_close = TRUE;
    } else if( ( status != PARSE_SUCCESS )
               && ( status != PARSE_CONTINUE_1 )
               && ( status != PARSE_INCOMPLETE ) ) {
        //error
        ( *size ) = 0;
        return UPNP_E_BAD_RESPONSE;
    }
    //read more if necessary entity
    while( ( ( handle->entity_offset + ( *size ) ) >
             handle->response.msg.entity.length )
           && ( ! handle->cancel )
           && ( handle->response.position != POS_COMPLETE ) ) {
        num_read =
            sock_read( &handle->sock_info, tempbuf, sizeof( tempbuf ),
                       &timeout );
        if( num_read > 0 ) {
            // append data to buffer
            ret_code = membuffer_append( &handle->response.msg.msg,
                                         tempbuf, num_read );
            if( ret_code != 0 ) {
                // set failure status
                handle->response.http_error_code =
                    HTTP_INTERNAL_SERVER_ERROR;
                ( *size ) = 0;
                return PARSE_FAILURE;
            }
            status = parser_parse_entity( &handle->response );
            if( status == PARSE_INCOMPLETE_ENTITY ) {
                // read until close
                ok_on_close = TRUE;
            } else if( ( status != PARSE_SUCCESS )
                       && ( status != PARSE_CONTINUE_1 )
                       && ( status != PARSE_INCOMPLETE ) ) {
                //error
                ( *size ) = 0;
                return UPNP_E_BAD_RESPONSE;
            }
        } else if( num_read == 0 ) {
            if( ok_on_close ) {
                UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
                    "<<< (RECVD) <<<\n%s\n-----------------\n",
                    handle->response.msg.msg.buf );
                    handle->response.position = POS_COMPLETE;
            } else {
                // partial msg
                ( *size ) = 0;
                handle->response.http_error_code = HTTP_BAD_REQUEST;    // or response
                return UPNP_E_BAD_HTTPMSG;
            }
        } else {
            ( *size ) = 0;
            return num_read;
        }
    }

    if( ( handle->entity_offset + ( *size ) ) >
        handle->response.msg.entity.length ) {
        ( *size ) =
            handle->response.msg.entity.length - handle->entity_offset;
    }

    memcpy( buf,
            &handle->response.msg.msg.buf[handle->
                                          response.entity_start_position +
                                          handle->entity_offset],
            ( *size ) );
    handle->entity_offset += ( *size );

    if ( handle->cancel )
        return UPNP_E_CANCELED;

    return UPNP_E_SUCCESS;
}

/************************************************************************
 * Function: http_HttpGetProgress
 *
 * Parameters:
 *    IN void *Handle;        Handle to the HTTP get object
 *    OUT unsigned int *length;     Buffer to get the read and parsed data
 *    OUT unsigned int *total;      Size of tge buffer passed
 *
 * Description:
 *    Extracts information from the Handle to the HTTP get object.
 *
 * Return: int
 *    UPNP_E_SUCCESS          - On Sucess
 *    UPNP_E_INVALID_PARAM    - Invalid Parameter
 ************************************************************************/
int http_HttpGetProgress( IN void *Handle, 
                      OUT unsigned int *length,
                      OUT unsigned int *total )
{
    http_get_handle_t *handle = Handle;

    if( ( !handle ) || ( !length ) || ( !total ) ) {
        return UPNP_E_INVALID_PARAM;
    }
    *length = handle->response.msg.entity.length;
    *total = handle->response.content_length;
    return UPNP_E_SUCCESS;
}

/************************************************************************
 * Function: http_CancelHttpGet
 *
 * Parameters:
 *    IN void *Handle;  Handle to HTTP get object
 *
 * Description:
 *    Set the cancel flag of the HttpGet handle
 *
 * Return: int
 *    UPNP_E_SUCCESS          - On Success
 *    UPNP_E_INVALID_PARAM    - Invalid Parameter
 ************************************************************************/
int
http_CancelHttpGet( IN void *Handle )
{
    http_get_handle_t *handle = Handle;

    if( !handle ) {
        return UPNP_E_INVALID_PARAM;
    }

    handle->cancel = 1;

    return UPNP_E_SUCCESS;
}


/************************************************************************
 * Function: http_CloseHttpGet
 *
 * Parameters:
 *    IN void *Handle;  Handle to HTTP get object
 *
 * Description:
 *    Clears the handle allocated for the HTTP GET operation
 *    Clears socket states and memory allocated for socket operations. 
 *
 * Return: int
 *    UPNP_E_SUCCESS          - On Success
 *    UPNP_E_INVALID_PARAM    - Invalid Parameter
 ************************************************************************/
int
http_CloseHttpGet( IN void *Handle )
{
    http_get_handle_t *handle = Handle;

    if( !handle ) {
        return UPNP_E_INVALID_PARAM;
    }

    sock_destroy( &handle->sock_info, SD_BOTH );    //should shutdown completely
    httpmsg_destroy( &handle->response.msg );
    handle->entity_offset = 0;
    free( handle );
    return UPNP_E_SUCCESS;
}

/************************************************************************
 * Function: http_OpenHttpGet
 *
 * Parameters:
 *    IN const char *url_str:       String as a URL
 *    IN OUT void **Handle:         Pointer to buffer to store HTTP
 *                            post handle
 *    IN OUT char **contentType:    Type of content
 *    OUT int *contentLength:       length of content
 *    OUT int *httpStatus:          HTTP status returned on receiving a
 *                            response message
 *    IN int timeout:               time out value
 *
 * Description:
 *    Makes the HTTP GET message, connects to the peer, 
 *    sends the HTTP GET request, gets the response and parses the 
 *    response.
 *
 * Return: int
 *    UPNP_E_SUCCESS          - On Success
 *    UPNP_E_INVALID_PARAM    - Invalid Paramters
 *    UPNP_E_OUTOF_MEMORY
 *    UPNP_E_SOCKET_ERROR
 *    UPNP_E_BAD_RESPONSE
 ************************************************************************/
int
http_OpenHttpGet( IN const char *url_str,
                  IN OUT void **Handle,
                  IN OUT char **contentType,
                  OUT int *contentLength,
                  OUT int *httpStatus,
                  IN int timeout )
{
    return http_OpenHttpGetProxy(url_str, NULL, Handle, contentType, contentLength, httpStatus, timeout);
}

/************************************************************************
 * Function: http_OpenHttpGetProxy
 *
 * Parameters:
 *    IN const char *url_str;       String as a URL
 *    IN const char *proxy_str;     String as a URL
 *    IN OUT void **Handle;         Pointer to buffer to store HTTP
 *                            post handle
 *    IN OUT char **contentType;    Type of content
 *    OUT int *contentLength;       length of content
 *    OUT int *httpStatus;          HTTP status returned on receiving a
 *                            response message
 *    IN int timeout:               time out value
 *
 * Description:
 *    Makes the HTTP GET message, connects to the peer, 
 *    sends the HTTP GET request, gets the response and parses the response.
 *    If a proxy URL is defined then the connection is made there.
 *
 * Return: int
 *    UPNP_E_SUCCESS          - On Success
 *    UPNP_E_INVALID_PARAM    - Invalid Paramters
 *    UPNP_E_OUTOF_MEMORY
 *    UPNP_E_SOCKET_ERROR
 *    UPNP_E_BAD_RESPONSE
 ************************************************************************/
int
http_OpenHttpGetProxy( IN const char *url_str,
                  IN const char *proxy_str,
                  IN OUT void **Handle,
                  IN OUT char **contentType,
                  OUT int *contentLength,
                  OUT int *httpStatus,
                  IN int timeout )
{
    int ret_code;
    int http_error_code;
    memptr ctype;
    int tcp_connection;
    membuffer request;
    http_get_handle_t *handle = NULL;
    uri_type url;
    uri_type proxy;
    uri_type *peer;
    parse_status_t status;

    if( ( !url_str ) || ( !Handle ) || ( !contentType )
        || ( !httpStatus ) ) {
        return UPNP_E_INVALID_PARAM;
    }

    ( *httpStatus ) = 0;
    ( *Handle ) = handle;
    ( *contentType ) = NULL;
    ( *contentLength ) = 0;

    if( ( ret_code =
          MakeGetMessage( url_str, proxy_str, &request, &url ) ) != UPNP_E_SUCCESS ) {
        return ret_code;
    }
    if( proxy_str ) {
        ret_code = http_FixStrUrl( ( char * )proxy_str, strlen( proxy_str ), &proxy );
        peer = &proxy;
    } else {
        peer = &url;
    }

    handle = ( http_get_handle_t * ) malloc( sizeof( http_get_handle_t ) );

    if( handle == NULL ) {
        return UPNP_E_OUTOF_MEMORY;
    }

    handle->entity_offset = 0;
    handle->cancel = 0;
    parser_response_init( &handle->response, HTTPMETHOD_GET );

    tcp_connection = socket( peer->hostport.IPaddress.ss_family, SOCK_STREAM, 0 );
    if( tcp_connection == -1 ) {
        ret_code = UPNP_E_SOCKET_ERROR;
        goto errorHandler;
    }

    if( sock_init( &handle->sock_info, tcp_connection ) != UPNP_E_SUCCESS )
    {
        sock_destroy( &handle->sock_info, SD_BOTH );
        ret_code = UPNP_E_SOCKET_ERROR;
        goto errorHandler;
    }

    ret_code = connect( handle->sock_info.socket,
                        ( struct sockaddr * )&peer->hostport.IPaddress,
                        sizeof( struct sockaddr_storage ) );

    if( ret_code == -1 ) {
        sock_destroy( &handle->sock_info, SD_BOTH );
        ret_code = UPNP_E_SOCKET_CONNECT;
        goto errorHandler;
    }
    // send request
    ret_code = http_SendMessage( &handle->sock_info, &timeout, "b",
                                 request.buf, request.length );
    if( ret_code != 0 ) {
        sock_destroy( &handle->sock_info, SD_BOTH );
        goto errorHandler;
    }

    status =
        ReadResponseLineAndHeaders( &handle->sock_info, &handle->response,
                                    &timeout, &http_error_code );

    if( status != PARSE_OK ) {
        ret_code = UPNP_E_BAD_RESPONSE;
        goto errorHandler;
    }

    status = parser_get_entity_read_method( &handle->response );

    if( ( status != PARSE_CONTINUE_1 ) && ( status != PARSE_SUCCESS ) ) {
        ret_code = UPNP_E_BAD_RESPONSE;
        goto errorHandler;
    }

    ( *httpStatus ) = handle->response.msg.status_code;
    ret_code = UPNP_E_SUCCESS;

    if( httpmsg_find_hdr( &handle->response.msg, HDR_CONTENT_TYPE, &ctype )
        == NULL ) {
        *contentType = NULL;    // no content-type
    } else {
        *contentType = ctype.buf;
    }

    if( handle->response.position == POS_COMPLETE ) {
        ( *contentLength ) = 0;
    } else if( handle->response.ent_position == ENTREAD_USING_CHUNKED ) {
        ( *contentLength ) = UPNP_USING_CHUNKED;
    } else if( handle->response.ent_position == ENTREAD_USING_CLEN ) {
        ( *contentLength ) = handle->response.content_length;
    } else if( handle->response.ent_position == ENTREAD_UNTIL_CLOSE ) {
        ( *contentLength ) = UPNP_UNTIL_CLOSE;
    }

  errorHandler:

    ( *Handle ) = handle;

    membuffer_destroy( &request );

    if( ret_code != UPNP_E_SUCCESS ) {
        httpmsg_destroy( &handle->response.msg );
    }
    return ret_code;
}

/************************************************************************
 * Function: http_SendStatusResponse
 *
 * Parameters:
 *    IN SOCKINFO *info;            Socket information object
 *    IN int http_status_code;      error code returned while making 
 *                            or sending the response message
 *    IN int request_major_version; request major version
 *    IN int request_minor_version; request minor version
 *
 * Description:
 *    Generate a response message for the status query and send the
 *    status response.
 *
 * Return: int
 *    0 -- success
 *    UPNP_E_OUTOF_MEMORY
 *    UPNP_E_SOCKET_WRITE
 *    UPNP_E_TIMEDOUT
 ************************************************************************/
int
http_SendStatusResponse( IN SOCKINFO * info,
                         IN int http_status_code,
                         IN int request_major_version,
                         IN int request_minor_version )
{
    int response_major,
      response_minor;
    membuffer membuf;
    int ret;
    int timeout;

    http_CalcResponseVersion( request_major_version, request_minor_version,
                              &response_major, &response_minor );

    membuffer_init( &membuf );
    membuf.size_inc = 70;

    ret = http_MakeMessage(
        &membuf, response_major, response_minor,
        "RSCB",
        http_status_code,  // response start line
        http_status_code ); // body
    if( ret == 0 ) {
        timeout = HTTP_DEFAULT_TIMEOUT;
        ret = http_SendMessage( info, &timeout, "b",
                                membuf.buf, membuf.length );
    }

    membuffer_destroy( &membuf );

    return ret;
}


/************************************************************************
 * Function: http_MakeMessage
 *
 * Parameters:
 *    INOUT membuffer* buf;         buffer with the contents of the 
 *                            message
 *    IN int http_major_version;    HTTP major version
 *    IN int http_minor_version;    HTTP minor version
 *    IN const char* fmt;           Pattern format 
 *    ...;  
 *
 * Description:
 *    Generate an HTTP message based on the format that is specified
 *    in the input parameters.
 *
 * fmt types:
 *    'B':  arg = int status_code 
 *          appends content-length, content-type and HTML body
 *          for given code
 *    'b':  arg1 = const char* buf;
 *          arg2 = size_t buf_length memory ptr
 *    'C':  (no args) appends a HTTP CONNECTION: close header 
 *                depending on major,minor version
 *    'c':  (no args) appends CRLF "\r\n"
 *    'D':  (no args) appends HTTP DATE: header
 *    'd':  arg = int number            // appends decimal number
 *    'G':  arg = range information     // add range header
 *    'h':  arg = off_t number          // appends off_t number
 *    'K':  (no args)                   // add chunky header
 *    'N':  arg1 = off_t content_length // content-length header
 *    'q':    arg1 = http_method_t        // request start line and HOST header
 *          arg2 = (uri_type *)
 *    'Q':  arg1 = http_method_t;       // start line of request
 *          arg2 = char* url; 
 *          arg3 = size_t url_length 
 *    'R':  arg = int status_code       // adds a response start line
 *    'S':  (no args) appends HTTP SERVER: header
 *    's':  arg = const char* C_string
 *    'T':  arg = char * content_type; format
 *          e.g: "text/html"; content-type header
 *    't':  arg = time_t * gmt_time     // appends time in RFC 1123 fmt
 *    'U':  (no args) appends HTTP USER-AGENT: header
 *      'X':    arg = const char useragent; "redsonic" HTTP X-User-Agent: useragent
 *
 * Return: int
 *    0 - On Success
 *    UPNP_E_OUTOF_MEMORY
 *    UPNP_E_INVALID_URL
 ************************************************************************/
int
http_MakeMessage( INOUT membuffer * buf,
                  IN int http_major_version,
                  IN int http_minor_version,
                  IN const char *fmt,
                  ... )
{
    char c;
    char *s = NULL;
    size_t num;
    off_t bignum;
    size_t length;
    time_t *loc_time;
    time_t curr_time;
    struct tm *date;
    char *start_str,
     *end_str;
    int status_code;
    const char *status_msg;
    http_method_t method;
    const char *method_str;
    const char *url_str;
    const char *temp_str;
    uri_type url;
    uri_type *uri_ptr;
    int error_code = UPNP_E_OUTOF_MEMORY;

    va_list argp;
    char tempbuf[200];
    const char *weekday_str = "Sun\0Mon\0Tue\0Wed\0Thu\0Fri\0Sat";
    const char *month_str = "Jan\0Feb\0Mar\0Apr\0May\0Jun\0"
        "Jul\0Aug\0Sep\0Oct\0Nov\0Dec";

    va_start( argp, fmt );

    while( ( c = *fmt++ ) != 0 ) {
        if( c == 's' ) {
            // C string
            s = ( char * )va_arg( argp, char * );
            assert( s );
            UpnpPrintf(UPNP_ALL,HTTP,__FILE__,__LINE__,"Adding a string : %s\n", s); 
            if( membuffer_append( buf, s, strlen( s ) ) != 0 ) {
                goto error_handler;
            }
        } else if( c == 'K' ) {
            // Add Chunky header
            if( membuffer_append
                ( buf, "TRANSFER-ENCODING: chunked\r\n",
                  strlen( "Transfer-Encoding: chunked\r\n" ) ) != 0 ) {
                goto error_handler;
            }
        } else if( c == 'G' ) {
            // Add Range header
            struct SendInstruction *RespInstr;
            RespInstr = (struct SendInstruction *)
                va_arg( argp, struct SendInstruction *);
            assert( RespInstr );
            // connection header
            if( membuffer_append
                ( buf, RespInstr->RangeHeader,
                  strlen( RespInstr->RangeHeader ) ) != 0 ) {
                goto error_handler;
            }
        } else if( c == 'b' ) {
            // mem buffer
            s = ( char * )va_arg( argp, char * );

            UpnpPrintf(UPNP_ALL,HTTP,__FILE__,__LINE__,
                "Adding a char Buffer starting with: %c\n", s[0]);
            assert( s );
            length = ( size_t ) va_arg( argp, size_t );
            if( membuffer_append( buf, s, length ) != 0 ) {
                goto error_handler;
            }
        }
        else if( c == 'c' ) {
            // crlf
            if( membuffer_append( buf, "\r\n", 2 ) != 0 ) {
                goto error_handler;
            }
        }
        else if( c == 'd' ) {
            // integer
            num = ( int )va_arg( argp, int );
            sprintf( tempbuf, "%"PRIzu, num );
            if( membuffer_append( buf, tempbuf, strlen( tempbuf ) ) != 0 ) {
                goto error_handler;
            }
        }
        else if( c == 'h' ) {
            // off_t
            bignum = ( off_t )va_arg( argp, off_t );

            sprintf( tempbuf, "%"PRId64, (int64_t)bignum );
            if( membuffer_append( buf, tempbuf, strlen( tempbuf ) ) != 0 ) {
                goto error_handler;
            }
        }
        else if( c == 't' || c == 'D' ) {
            // date
            if( c == 'D' ) {
                // header
                start_str = "DATE: ";
                end_str = "\r\n";
                curr_time = time( NULL );
                date = gmtime( &curr_time );
            } else {
                // date value only
                start_str = end_str = "";
                loc_time = ( time_t * ) va_arg( argp, time_t * );
                assert( loc_time );
                date = gmtime( loc_time );
            }

            sprintf( tempbuf, "%s%s, %02d %s %d %02d:%02d:%02d GMT%s",
                     start_str,
                     &weekday_str[date->tm_wday * 4], date->tm_mday,
                     &month_str[date->tm_mon * 4], date->tm_year + 1900,
                     date->tm_hour, date->tm_min, date->tm_sec, end_str );

            if( membuffer_append( buf, tempbuf, strlen( tempbuf ) ) != 0 ) {
                goto error_handler;
            }
        } else if( c == 'C' ) {
            if( ( http_major_version > 1 ) ||
                ( http_major_version == 1 && http_minor_version == 1 )
                 ) {
                // connection header
                if( membuffer_append_str( buf, "CONNECTION: close\r\n" ) !=
                    0 ) {
                    goto error_handler;
                }
            }
        } else if( c == 'N' ) {
            // content-length header
            bignum = ( off_t )va_arg( argp, off_t );

            assert( bignum >= 0 );
            if (http_MakeMessage(
                buf, http_major_version, http_minor_version,
                "shc",
                "CONTENT-LENGTH: ", bignum ) != 0 ) {
                goto error_handler;
            }
        } else if( c == 'S' || c == 'U' ) {
            // SERVER or USER-AGENT header
            temp_str = ( c == 'S' ) ? "SERVER: " : "USER-AGENT: ";
            get_sdk_info( tempbuf );
            if (http_MakeMessage(
                buf, http_major_version, http_minor_version,
                "ss",
                temp_str, tempbuf ) != 0 ) {
                goto error_handler;
            }
        } else if( c == 'X' ) {
            // C string
            s = ( char * )va_arg( argp, char * );
            assert( s );
            if( membuffer_append_str( buf, "X-User-Agent: ") != 0 ) {
                goto error_handler;
            }
            if( membuffer_append( buf, s, strlen( s ) ) != 0 ) {
                goto error_handler;
            }
        } else if( c == 'R' ) {
            // response start line
            //   e.g.: 'HTTP/1.1 200 OK'
            //
            // code
            status_code = ( int )va_arg( argp, int );
            assert( status_code > 0 );
            sprintf( tempbuf, "HTTP/%d.%d %d ",
                     http_major_version, http_minor_version, status_code );
            // str
            status_msg = http_get_code_text( status_code );
            if (http_MakeMessage(
                buf, http_major_version, http_minor_version,
                "ssc",
                tempbuf,
                status_msg ) != 0 ) {
                goto error_handler;
            }
        } else if( c == 'B' ) {
            // body of a simple reply
            // 
            status_code = ( int )va_arg( argp, int );
            sprintf( tempbuf, "%s%d %s%s",
                     "<html><body><h1>",
                     status_code, http_get_code_text( status_code ),
                     "</h1></body></html>" );
            bignum = strlen( tempbuf );
            if (http_MakeMessage(
                    buf, http_major_version, http_minor_version,
                    "NTcs",
                    bignum, // content-length
                    "text/html",  // content-type
                    tempbuf ) != 0 // body
            ) {
                goto error_handler;
            }
        } else if( c == 'Q' ) {
            // request start line
            // GET /foo/bar.html HTTP/1.1\r\n
            method = ( http_method_t ) va_arg( argp, http_method_t );
            method_str = method_to_str( method );
            url_str = ( const char * )va_arg( argp, const char * );
            num = ( size_t )va_arg( argp, size_t );   // length of url_str
            if (http_MakeMessage(
                buf, http_major_version, http_minor_version,
                "ssbsdsdc",
                method_str,  // method
                " ", url_str, num,    // url
                " HTTP/", http_major_version, ".", http_minor_version ) != 0 ) {
                goto error_handler;
            }
        } else if( c == 'q' ) {
            // request start line and HOST header
            method = ( http_method_t ) va_arg( argp, http_method_t );
            uri_ptr = ( uri_type * ) va_arg( argp, uri_type * );
            assert( uri_ptr );
            if( http_FixUrl( uri_ptr, &url ) != 0 ) {
                error_code = UPNP_E_INVALID_URL;
                goto error_handler;
            }
            if (http_MakeMessage(
                buf, http_major_version, http_minor_version,
                "Q" "sbc",
                method, url.pathquery.buff, url.pathquery.size,
                "HOST: ", url.hostport.text.buff, url.hostport.text.size ) != 0 ) {
                goto error_handler;
            }
        } else if( c == 'T' ) {
            // content type header
            temp_str = ( const char * )va_arg( argp, const char * );    // type/subtype format
            if (http_MakeMessage(
                buf, http_major_version, http_minor_version,
            "ssc",
                "CONTENT-TYPE: ", temp_str ) != 0 ) {
                goto error_handler;
            }
        } else {
            assert( 0 );
        }
    }

    return 0;

error_handler:
    va_end( argp );
    membuffer_destroy( buf );
    return error_code;
}


/************************************************************************
 * Function: http_CalcResponseVersion
 *
 * Parameters:
 *    IN int request_major_vers;    Request major version
 *    IN int request_minor_vers;    Request minor version
 *    OUT int* response_major_vers; Response mojor version
 *    OUT int* response_minor_vers; Response minor version
 *
 * Description:
 *    Calculate HTTP response versions based on the request versions.
 *
 * Return: void
 ************************************************************************/
void
http_CalcResponseVersion( IN int request_major_vers,
                          IN int request_minor_vers,
                          OUT int *response_major_vers,
                          OUT int *response_minor_vers )
{
    if( ( request_major_vers > 1 ) ||
        ( request_major_vers == 1 && request_minor_vers >= 1 )
         ) {
        *response_major_vers = 1;
        *response_minor_vers = 1;
    } else {
        *response_major_vers = request_major_vers;
        *response_minor_vers = request_minor_vers;
    }
}

/************************************************************************
* Function: MakeGetMessageEx
*
* Parameters:
*     const char *url_str;    String as a URL
*     membuffer *request;     Buffer containing the request
*     uri_type *url;          URI object containing the scheme, path
*                       query token, etc.
*
* Description:
*     Makes the message for the HTTP GET method
*
* Returns:
*     UPNP_E_INVALID_URL
*     Error Codes returned by http_MakeMessage
*     UPNP_E_SUCCESS
************************************************************************/
int
MakeGetMessageEx( const char *url_str,
                  membuffer * request,
                  uri_type * url,
                  struct SendInstruction *pRangeSpecifier )
{
    int errCode = UPNP_E_SUCCESS;
    char *urlPath = NULL;
    size_t hostlen = 0;
    char *hoststr,
     *temp;

    do {
        UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
            "DOWNLOAD URL : %s\n", url_str );

        if( ( errCode = http_FixStrUrl( ( char * )url_str,
            strlen( url_str ), url ) ) != UPNP_E_SUCCESS ) {
            break;
        }
        // make msg
        membuffer_init( request );
        urlPath = alloca( strlen( url_str ) + 1 );
        if( !urlPath ) {
            errCode = UPNP_E_OUTOF_MEMORY;
            break;
        }

        memset( urlPath, 0, strlen( url_str ) + 1 );
        strcpy( urlPath, url_str );
        hoststr = strstr( urlPath, "//" );
        if( hoststr == NULL ) {
            errCode = UPNP_E_INVALID_URL;
            break;
        }

        hoststr += 2;
        temp = strchr( hoststr, '/' );
        if( temp == NULL ) {
            errCode = UPNP_E_INVALID_URL;
            break;
        }

        *temp = '\0';
        hostlen = strlen( hoststr );
        *temp = '/';
        UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
            "HOSTNAME : %s Length : %"PRIzu"\n",
            hoststr, hostlen );

        errCode = http_MakeMessage(
                request, 1, 1,
                "Q" "s" "bc" "GDCUc",
                HTTPMETHOD_GET, url->pathquery.buff, url->pathquery.size,
                "HOST: ",
            hoststr, hostlen,
                pRangeSpecifier );

        if( errCode != 0 ) {
            UpnpPrintf( UPNP_INFO, HTTP, __FILE__, __LINE__,
                "HTTP Makemessage failed\n" );
            membuffer_destroy( request );

            return errCode;
        }
    } while( 0 );

    UpnpPrintf(UPNP_INFO, HTTP, __FILE__, __LINE__,
        "HTTP Buffer:\n%s\n" "----------END--------\n",
        request->buf);

    return errCode;
}

#define SIZE_RANGE_BUFFER 50

/************************************************************************
 * Function: http_OpenHttpGetEx
 *
 * Parameters:
 *    IN const char *url_str;       String as a URL
 *    IN OUT void **Handle;         Pointer to buffer to store HTTP
 *                            post handle
 *    IN OUT char **contentType;    Type of content
 *    OUT int *contentLength;       length of content
 *    OUT int *httpStatus;          HTTP status returned on receiving a
 *                            response message
 *    IN int timeout;               time out value
 *
 * Description:
 *    Makes the HTTP GET message, connects to the peer, 
 *    sends the HTTP GET request, gets the response and parses the 
 *    response.
 *
 * Return: int
 *    UPNP_E_SUCCESS          - On Success
 *    UPNP_E_INVALID_PARAM    - Invalid Paramters
 *    UPNP_E_OUTOF_MEMORY
 *    UPNP_E_SOCKET_ERROR
 *    UPNP_E_BAD_RESPONSE
 ************************************************************************/
int
http_OpenHttpGetEx( IN const char *url_str,
                    IN OUT void **Handle,
                    IN OUT char **contentType,
                    OUT int *contentLength,
                    OUT int *httpStatus,
                    IN int lowRange,
                    IN int highRange,
                    IN int timeout )
{
    int http_error_code;
    memptr ctype;
    int tcp_connection;
    membuffer request;
    http_get_handle_t *handle = NULL;
    uri_type url;
    parse_status_t status;
    int errCode = UPNP_E_SUCCESS;

    //  char rangeBuf[SIZE_RANGE_BUFFER];
    struct SendInstruction rangeBuf;

    do {
        // Checking Input parameters
        if( ( !url_str ) || ( !Handle ) ||
            ( !contentType ) || ( !httpStatus ) ) {
            errCode = UPNP_E_INVALID_PARAM;
            break;
        }
        // Initialize output parameters
        ( *httpStatus ) = 0;
        ( *Handle ) = handle;
        ( *contentType ) = NULL;
        ( *contentLength ) = 0;

        if( lowRange > highRange ) {
            errCode = UPNP_E_INTERNAL_ERROR;
            break;
        }

        memset( &rangeBuf, 0, sizeof( rangeBuf ) );
        sprintf( rangeBuf.RangeHeader, "Range: bytes=%d-%d\r\n",
                 lowRange, highRange );

        membuffer_init( &request );

        if( ( errCode = MakeGetMessageEx( url_str,
                                          &request, &url, &rangeBuf ) )
            != UPNP_E_SUCCESS ) {
            break;
        }

        handle =
            ( http_get_handle_t * ) malloc( sizeof( http_get_handle_t ) );
        if( handle == NULL ) {
            errCode = UPNP_E_OUTOF_MEMORY;
            break;
        }

        memset( handle, 0, sizeof( *handle ) );

        handle->entity_offset = 0;
        parser_response_init( &handle->response, HTTPMETHOD_GET );

        tcp_connection = socket( url.hostport.IPaddress.ss_family, SOCK_STREAM, 0 );
        if( tcp_connection == -1 ) {
            errCode = UPNP_E_SOCKET_ERROR;
            free( handle );
            break;
        }

        if( sock_init( &handle->sock_info, tcp_connection ) !=
            UPNP_E_SUCCESS ) {
            sock_destroy( &handle->sock_info, SD_BOTH );
            errCode = UPNP_E_SOCKET_ERROR;
            free( handle );
            break;
        }

        errCode = connect( handle->sock_info.socket,
                           ( struct sockaddr * )&url.hostport.IPaddress,
                           sizeof( struct sockaddr_storage ) );
        if( errCode == -1 ) {
            sock_destroy( &handle->sock_info, SD_BOTH );
            errCode = UPNP_E_SOCKET_CONNECT;
            free( handle );
            break;
        }
        // send request
        errCode = http_SendMessage( &handle->sock_info,
                                    &timeout,
                                    "b", request.buf, request.length );

        if( errCode != UPNP_E_SUCCESS ) {
            sock_destroy( &handle->sock_info, SD_BOTH );
            free( handle );
            break;
        }

        status = ReadResponseLineAndHeaders( &handle->sock_info,
                                             &handle->response,
                                             &timeout, &http_error_code );

        if( status != PARSE_OK ) {
            errCode = UPNP_E_BAD_RESPONSE;
            free( handle );
            break;
        }

        status = parser_get_entity_read_method( &handle->response );
        if( ( status != PARSE_CONTINUE_1 ) && ( status != PARSE_SUCCESS ) ) {
            errCode = UPNP_E_BAD_RESPONSE;
            free( handle );
            break;
        }

        ( *httpStatus ) = handle->response.msg.status_code;
        errCode = UPNP_E_SUCCESS;

        if( httpmsg_find_hdr( &handle->response.msg,
                              HDR_CONTENT_TYPE, &ctype ) == NULL ) {
            *contentType = NULL;    // no content-type
        } else {
            *contentType = ctype.buf;
        }

        if( handle->response.position == POS_COMPLETE ) {
            ( *contentLength ) = 0;
        } else if( handle->response.ent_position == ENTREAD_USING_CHUNKED ) {
            ( *contentLength ) = UPNP_USING_CHUNKED;
        } else if( handle->response.ent_position == ENTREAD_USING_CLEN ) {
            ( *contentLength ) = handle->response.content_length;
        } else if( handle->response.ent_position == ENTREAD_UNTIL_CLOSE ) {
            ( *contentLength ) = UPNP_UNTIL_CLOSE;
        }

        ( *Handle ) = handle;

    } while( 0 );

    membuffer_destroy( &request );

    return errCode;
}


/************************************************************************
 * Function: get_sdk_info
 *
 * Parameters:
 *    OUT char *info;   buffer to store the operating system information
 *
 * Description:
 *    Returns the server information for the operating system
 *
 * Return:
 *    UPNP_INLINE void
 ************************************************************************/
// 'info' should have a size of at least 100 bytes
void
get_sdk_info( OUT char *info )
{
#ifdef WIN32
    OSVERSIONINFO versioninfo;
    versioninfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);

    if (GetVersionEx(&versioninfo)!=0) {
        sprintf( info,
            "%d.%d.%d %d/%s, UPnP/1.0, Portable SDK for UPnP devices/"PACKAGE_VERSION"\r\n",
            versioninfo.dwMajorVersion,
            versioninfo.dwMinorVersion,
            versioninfo.dwBuildNumber,
            versioninfo.dwPlatformId,
            versioninfo.szCSDVersion );
    } else {
        *info = '\0';
    }
#else
    int ret_code;
    struct utsname sys_info;

    ret_code = uname( &sys_info );
    if( ret_code == -1 ) {
        *info = '\0';
    }
    sprintf( info,
        "%s/%s, UPnP/1.0, Portable SDK for UPnP devices/"PACKAGE_VERSION "\r\n",
        sys_info.sysname,
        sys_info.release );
#endif
}


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