File content as of revision 7:9d86d022fa68:

/*****************************************************************************
* Dynamic HTML string handlers: 
* Nine dynamic HTML fields are updated on browser refresh or button press: 
*     Acceleration
*     Magnetometer                  
*     eCompass      
*     Altitude
*     Battery Voltage
*     Ambient Light
*     Temperature                   
*     Slider Position       
*     Page Views
*
* CGI HTML forms: 
* Three CGI form inputs are used to submit data from browser to the Server: 
* On screen buttons: -Red-, Green, Blue (for control of RGB LED output color) 
*
* myindex[] contains the HTML string that defines the webpage that is served
* Use an online HTML validator to verify HTML code before running it on the MCU
* eg. 
* www.w3schools.com/tags/tryit.asp?filename=tryhtml_div_test
* www.onlinewebcheck.com/check.php?adv=1
* Note: Before checking the HTML in one of these validators, 
* strip-out all “\” backslash characters (using search & replace)
*
* Webserver code is based on TI's CC3000 Simple HTTP Webserver:  
* http://processors.wiki.ti.com/index.php/CC3000_Wi-Fi_for_MCU
* 
* More detail on implementation of this Webserver App is available here:
* http://processors.wiki.ti.com/index.php/CC3000_HTTP_Server_Demo_Session
*
* A more advanced Webserver and Client App is also available from TI for the CC3000:
* http://processors.wiki.ti.com/index.php/CC3000_Web_Server_Client_Application
* (at this time not yet ported to Kinetis-L as the host processor)
* 
******************************************************************************
*
*  demo.c - CC3000 Main Demo Application
*  Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
*
*  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 the name of Texas Instruments Incorporated 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 THE COPYRIGHT
*  OWNER 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.
*
*****************************************************************************/

#include "mbed.h"
#include "defLED.h"
#include "demo.h"
#include "AvnetHTML.h"
#include "TSISensor.h"
#include "Wi-Go_eCompass_Lib_V3.h"

extern DigitalOut ledr;
extern DigitalOut ledg;
extern DigitalOut ledb;
extern DigitalOut led1;
extern DigitalOut led2;
extern DigitalOut led3;
extern TSISensor tsi;

// Setup the functions to handle our CGI parameters
cgi_handler pHandlers;
dyn_html_handler htmlHandlers;

extern tNetappIpconfigRetArgs ipinfo2;

extern axis6_t axis6;
extern int server_running;
extern unsigned char newData;
extern unsigned short adc_sample3;

// Variable declared in main and checked in the systick handler
// Code in the systick handler is only processed when Systick_Allowed = 1
extern bool Systick_Allowed;

/** \brief Pointer to the index HTML page */
char * indexPage;

/** \brief Pointer to CGI handler structure */
cgi_handler * chList;

/** \brief Pointer to Dynamic HTML handler structure */
dyn_html_handler * htmlList;

/** \brief Page view counter */
int viewCounter = 1;
#define REQ_BUFFER_SIZE     400
#define HTTP_TX_BLOCK_SIZE  256
//#define HTTP_TX_BLOCK_SIZE  1024
//#define HTTP_TX_BLOCK_SIZE  512


// Setup the functions to handle our CGI parameters
char requestBuffer[REQ_BUFFER_SIZE];





/*
// ---------- HTML Webpage Content is defined here ----------
// Caution! Field labels and spaces in the HTML should not be edited without making corresponding changes in the C-code!
char index[] = {
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\"><html lang=\"en-US\">"
"<head>"
"<META content=\"text/html;charset=ISO-8859-1\" http-equiv=\"content-type\">"
"<title>Wi-Go WebServer</title>"
//"<META HTTP-EQUIV=\"refresh\" content=\"2\">"   // Uncomment for auto-refresh every 2 seconds
"</head>"

"<body><div style=\"text-align: left\"><font size=\"6\" color=\"Red\" face=\"Tahoma\">"
"<b>Avnet Wi-Go Webserver</b></font>"
"<hr size=3 width=600 align=left>"
"<font size=\"5\" color=\"Red\" face=\"Tahoma\"><b>LED RGB color select...</b></font>"

//"<font size=\"5\" color=\"Black\" face=\"monospace\"></font>" 
"<form method=\"get\" action=\"index.html\" name=\"server\">"
"<input name=\"ledCon\" type=\"submit\" value=\"-Red-\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"
"<input name=\"ledCon\" type=\"submit\" value=\"Green\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"
"<input name=\"ledCon\" type=\"submit\" value=\"Blue-\">"
"</form></div>" 

"<hr size=3 width=600 align=left>"
"<div style=\"text-align: left\"><font size=\"5\" color=\"Red\" face=\"Tahoma\">"
"<b>Navigation Sensors</b></font></div>"

"<div style=\"text-align:left\"><font size=\"4\" color=\"Black\" face=\"monospace\"><b>"
"Acceleration(G)..                                       <br>"
"Magnetometer(uT).                                       <br>"
"eCompass.........                                         <br>"
"Altitude.........                <br></b></font></div>"

"<hr size=3 width=600 align=left>"
"<div style=\"text-align: left\"><font size=\"5\" color=\"Red\" face=\"Tahoma\">"
"<b>Status and Control</b></font></div>"

"<div style=\"text-align:left\"><font size=\"4\" color=\"Black\" face=\"monospace\"><b>"
"Battery Voltage..       <br>"
"Ambient Light....       <br>"
"Temperature......          <br>"
"Slider Position..          <br>"
"Page Views.......        </b></font>"
"<hr size=3 width=600 align=left>"
"</body></html>"};  // delete this line if adding the SVG code below...
*/
// Optional section 1: Full SVG graphic example: Uncomment this section to display the standard Wi-Fi logo in lower area of webpage
// Browsers supporting SVG: Chrome and FireFox (all versions), Android (3.0 onwards), Safari (5.0 onwards), IE (9.0 onwards?)
/*
"<!--[if !IE]><!-->"  // This prevents SVG content being sent to Internet Explorer
"<svg>" 
"xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" height=\"175.49\" width=\"400\""
"xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\""
"xmlns:cc=\"http://creativecommons.org/ns#\""
"xmlns:dc=\"http://purl.org/dc/elements/1.1/\">"
"<defs></defs>"
"<metadata>"
"<rdf:RDF>"
"<cc:Work rdf:about=\"\">"
"<dc:format>image/svg+xml</dc:format>"
"<dc:type rdf:resource=\"http://purl.org/dc/dcmitype/StillImage\"/>"
"<dc:title/>"
"</cc:Work>"
"</rdf:RDF>"
"</metadata>"
"<g transform=\"translate(-309.85919,-343.20843)\">"
"<g transform=\"matrix(3.7361528,0,0,-3.7361528,576.05074,474.82936)\">"
"<path fill-rule=\"nonzero\" fill=\"#231f20\" d=\"m0,0c4.977,0,9.049,4.077,9.049,9.049v5.389c0,4.973-4.072,9.048-9.049,9.048h-35.433c-4.973,0-9.049-4.075-9.049-9.048v-5.389c0-4.972,4.076-9.049,9.049-9.049\"/>"
"</g>"
"<g transform=\"matrix(3.7361528,0,0,-3.7361528,514.3818,441.01715)\">"
"<path fill-rule=\"nonzero\" fill=\"#FFF\" d=\"m0,0,0,5.389c0,4.072,3.314,7.32,7.32,7.32h9.187c4.007,0,7.253-3.248,7.253-7.32v-5.389c0-4.005-3.246-7.32-7.253-7.32h-20.239c2.281,1.656,3.732,4.284,3.732,7.32\"/>"
"</g>"
"<g transform=\"matrix(3.7361528,0,0,-3.7361528,469.99257,451.60916)\">"
"<path fill-rule=\"nonzero\" fill=\"#FFF\" d=\"m0,0-3.043,0-0.55,2.56c-0.345,1.794-0.692,4.005-0.761,4.833-0.069-0.828-0.416-3.039-0.825-4.833l-0.555-2.56h-2.968l-2.767,11.748h3.317l0.343-2.004c0.276-1.66,0.556-3.659,0.695-5.044,0.136,1.385,0.481,3.384,0.896,5.044l0.412,2.004h2.972l0.413-2.004c0.348-1.66,0.693-3.659,0.833-5.044,0.136,1.385,0.482,3.384,0.757,5.044l0.278,2.004h3.313\"/>"
"</g>"
"<g transform=\"matrix(3.7361528,0,0,-3.7361528,491.40819,416.23898)\">"
"<path fill-rule=\"nonzero\" fill=\"#FFF\" d=\"m0,0c-0.968,0-1.727,0.553-1.727,1.451,0,0.899,0.759,1.45,1.727,1.45,1.036,0,1.796-0.551,1.796-1.45,0-0.898-0.76-1.451-1.796-1.451m-1.521-0.968,3.0401,0,0-8.4984-3.0401,0,0,8.4984z\"/>"
"</g>"
"<g transform=\"matrix(3.7361528,0,0,-3.7361528,541.9845,418.05849)\">"
"<path fill-rule=\"nonzero\" fill=\"#231f20\" d=\"m0,0,0-2.618,6.22,0,0-2.767-6.22,0,0-3.593-3.247,0,0,11.748,10.156,0,0-2.77\"/>"
"</g>"
"<g transform=\"matrix(3.7361528,0,0,-3.7361528,580.44446,416.23898)\">"
"<path fill-rule=\"nonzero\" fill=\"#231f20\" d=\"m0,0c-0.97,0-1.727,0.553-1.727,1.451,0,0.899,0.757,1.45,1.727,1.45,1.035,0,1.797-0.551,1.797-1.45,0-0.898-0.762-1.451-1.797-1.451m-1.521-0.968,3.0371,0,0-8.4984-3.0371,0,0,8.4984z\"/>"
"</g>"
"</g>"
"</svg>"
"<!--<![endif]-->"  
*/                // end of conditional inclusion of SVG graphic (excludes Internet Explorer browser)
// ---- End of Wi-Fi logo SVG image definition ----

// Optional section 2: Simple SVG graphic example: Uncomment this section to generate a filled circle  in lower area of webpage
// eg. Could use to indicate RGB LED color (with addition of applicable C-code to dynamically update specified "fill=" color)
/*
"<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\">"
"<circle cx=\"155\" cy=\"22\" r=\"20\" stroke=\"DimGrey\" stroke-width=\"2\" fill=\"Red\"/>"
"</svg>"
"</body></html>"};
*/

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

//char ssid_name[] = SSID;
char testString[20];
//int vcc = 0;
//*****************************************************************************
//
//!  demo_wi-fi_main
//!
//!  \param  None
//!
//!  \return none
//!
//!  \brief   The main loop is executed here
//
//*****************************************************************************

int demo_wifi_main(void)
{
    server_running = 1;
    while(1)
    {
      /* Configure dynamic HTML string handlers
         0 : Acceleration
         1 : Magnetometer                   
         2 : eCompass       
         3 : Altitude
         ------------------- 
         4 : Battery Voltage
         5 : Ambient Light
         6 : Temperature                    
         7 : Slider Position        
         8 : Page Views
      */                    
        (htmlHandlers.dynHtmlFunc[0]) = getAccelXYZ_Str; 
        memcpy(htmlHandlers.dynHtmlParamName[0],"Acceleration(G).. ",strlen("Acceleration(G).. "));
        htmlHandlers.dynHtmlParamName[0][strlen("Acceleration(G).. ")] ='\0';

        (htmlHandlers.dynHtmlFunc[1]) = getM3110Str; 
        memcpy(htmlHandlers.dynHtmlParamName[1],"Magnetometer(uT). ",strlen("Magnetometer(uT). "));
        htmlHandlers.dynHtmlParamName[1][strlen("Magnetometer(uT). ")] ='\0';

        (htmlHandlers.dynHtmlFunc[2]) = getCompassStr;
        memcpy(htmlHandlers.dynHtmlParamName[2],"eCompass......... ",strlen("eCompass......... "));
        htmlHandlers.dynHtmlParamName[2][strlen("eCompass......... ")] ='\0';

        (htmlHandlers.dynHtmlFunc[3]) = getAltitudeStr; 
        memcpy(htmlHandlers.dynHtmlParamName[3],"Altitude......... ",strlen("Altitude......... "));
        htmlHandlers.dynHtmlParamName[3][strlen("Altitude......... ")] ='\0';

        (htmlHandlers.dynHtmlFunc[4]) = getBatteryVoltageStr;
        memcpy(htmlHandlers.dynHtmlParamName[4],"Battery Voltage.. ",strlen("Battery Voltage.. "));
        htmlHandlers.dynHtmlParamName[4][strlen("Battery Voltage.. ")] ='\0';

        (htmlHandlers.dynHtmlFunc[5]) = getLightVoltageStr;
        memcpy(htmlHandlers.dynHtmlParamName[5],"Ambient Light.... ",strlen("Ambient Light.... "));
        htmlHandlers.dynHtmlParamName[5][strlen("Ambient Light.... ")] ='\0';
            
        (htmlHandlers.dynHtmlFunc[6]) = getTemperatureStr; 
        memcpy(htmlHandlers.dynHtmlParamName[6],"Temperature...... ",strlen("Temperature...... "));
        htmlHandlers.dynHtmlParamName[6][strlen("Temperature...... ")] ='\0';

        (htmlHandlers.dynHtmlFunc[7]) = getTSI_sliderStr; 
        memcpy(htmlHandlers.dynHtmlParamName[7],"Slider Position.. ",strlen("Slider Position.. "));
        htmlHandlers.dynHtmlParamName[7][strlen("Slider Position.. ")] ='\0';

        (htmlHandlers.dynHtmlFunc[8]) = getViewsNum;
        memcpy(htmlHandlers.dynHtmlParamName[8],"Page Views....... ",strlen("Page Views....... "));
        htmlHandlers.dynHtmlParamName[8][strlen("Page Views....... ")] ='\0';

        // Configure CGI Handler
        (pHandlers.cgiHandlerFunc[0]) = testFunc;

        serverMain(HTTP_PORT,(char *)index, &pHandlers, &htmlHandlers);
    }
}


void testFunc(char * str)
{
    memcpy(testString,str,strlen(str));
    if(strcmp(str, "-Red-") == 0)
    {
        RED_ON; GREEN_OFF; BLUE_OFF; 
    }
    else if(strcmp(str, "Green") == 0) 
    {
        RED_OFF; GREEN_ON; BLUE_OFF;
    }
    else if (strcmp(str, "Blue-") == 0) 
    {
        RED_OFF; GREEN_OFF; BLUE_ON;
    }      
}

void getBatteryVoltageStr(char * str)
{
    sprintf(str,"    "); //clears field (needed if previous string had more characters)
    sprintf(str, "%d %%", adc_sample3);
}
 
void getLightVoltageStr(char * str)
{
    int LightPercent = 0;
    LightPercent = (axis6.light * 100) / 4096; 
    sprintf(str,"    "); //clears field (needed if previous string had more characters)
    sprintf(str, "%d %%", LightPercent);
}

void getAccelXYZ_Str(char * str) // MMA8451Q accelerometer - report axis with highest value 
{
    sprintf(str,"                                    "); //clears field (needed if previous string had more characters)   
    sprintf(str, "X= %1.2f, Y= %1.2f, Z= %1.2f", axis6.fGax, axis6.fGay, axis6.fGaz);;  
}  

void getTemperatureStr(char * str) // 
{
    sprintf(str, "%+d C", axis6.temp); 
}

void getTSI_sliderStr(char * str) // TSI Slider position 
{
    uint8_t slider_position; 
    
    slider_position = tsi.readPercentage() * 100; // Slider position as percentage
    sprintf(str,"    "); //clears field (needed if previous string had more characters)
    sprintf(str, "%d %%", slider_position);
}   

void getCompassStr(char * str)   // Mag3110 generated Compass bearing 
{
    char *compass_points[9] = {"North", "N-East", "East", "S-East", "South", "S-West", "West", "N-West", "North"};
    signed short compass_bearing = (axis6.compass + 23) / 45;
    sprintf(str,"                                        "); //clears field (needed if previous string had more characters)
    sprintf(str, "Roll=%-d  Pitch=%-d  Yaw=%-d [%s]", axis6.roll, axis6.pitch, axis6.yaw, compass_points[compass_bearing]);   // 
}   

void getM3110Str(char * str)   // Mag3110 displayed in units of UT 
{
    sprintf(str,"                                    "); //clears field (needed if previous string had more characters)
    sprintf(str, "X= %3.1f, Y= %3.1f, Z= %3.1f", axis6.fUTmx, axis6.fUTmy, axis6.fUTmz);
}   

void getAltitudeStr(char * str)    // Get Altitude 
{
    sprintf(str, "%+d meters", axis6.alt);   // str = integer portion of result 
}   



//*****************************************************************************
//
//! \brief  Main HTTP Server
//!
//! \param none
//!
//! \return none
//!
//
//*****************************************************************************
void serverMain(int port,
                char * ipage,
                cgi_handler * handleList,
                dyn_html_handler * dhList)
{
    static TCPSocketServer server;
    static TCPSocketConnection client;

    indexPage = ipage;
    chList = handleList;
    htmlList = dhList;

    server.bind(port);

    printf("Main HTTP server\r\n");

    // Start Listening
    if(server.listen() != 0);       // !!?? if statement is of no use - replace with server.listen();

    // Handle Clients and Data
    while(1)
    {
        int32_t status = server.accept(client);
        if (status >= 0)
        {
            LED_D2_ON;
            // Connection Accepted, Send Data
            // Wait for a data update
            client.set_blocking(true);
            printf("Connection\r\n");
//            printf("Connection from: %s \r\n", client.get_address());
            if(newData)
            {
                Systick_Allowed = 0;
// Alternative to Systick_Allowed - more intrusive as it will entirely disable systicks
//                SysTick->CTRL &= ~SysTick_CTRL_TICKINT_Msk;  // *** Disable SysTick Timer
                handleHTTPRequest(&client);
            }
            newData = 0;
            client.close();
            LED_D2_OFF;
        }
        else if(status == -57)
        {
            // BUG: Socket inactive so reopen socket
            // Inactive Socket, close and reopen it
            printf("Oops!!!\r\n");
            server.close();
            indexPage = ipage;
            chList = handleList;
            htmlList = dhList;
            server.bind(port);

            // Start Listening
            if (server.listen() != 0);       // !!?? if statement is of no use - replace with server.listen();
        }
        Systick_Allowed = 1;
//        SysTick->CTRL |=  SysTick_CTRL_TICKINT_Msk;  // *** Re-Enable SysTick Timer
    }
}

//*****************************************************************************
//
//! \brief  Handles HTTP Requests
//!
//! \param cnum is the client socket handle to be used
//!
//! \return none
//!
//
//*****************************************************************************
void handleHTTPRequest(TCPSocketConnection *client)
{
    char * reqline[3];
    char * cgiTok;

    int i = 0;
    char paramBuf[20];
    int bytesRecvd;
    char tempStr[40]; //PF was 26

    memset(requestBuffer,0,sizeof (requestBuffer));
    bytesRecvd = client->receive(requestBuffer, sizeof(requestBuffer));

    printf("handleHTTPRequest\r\n");

    if(bytesRecvd > 0)
    {
        // Received some data, check it and send data back
        reqline[0] = strstr(requestBuffer, "GET");
        if ( reqline[0] != NULL )
        {
            if (strstr (requestBuffer, "HTTP/1.0") != NULL && strstr (requestBuffer, "HTTP/1.1") != NULL )
            {
                client->send_all("HTTP/1.0 400 Bad Request\n", 25);
            }
            else
            {

#ifdef HTTP_CGI_ENABLED
                // Do we have CGI parameters we need to parse?
                if(strchr(requestBuffer, '?') != NULL)
                {
                    // Decode URL and handle each parameter sequentially
                    // according to table previously setup.
                    cgiTok = strstr(requestBuffer,"=");
                    if(cgiTok != NULL)
                    {
                        memset(paramBuf,0,sizeof(paramBuf));
                        memcpy(paramBuf,cgiTok+1,5);     // hard-coded for demo: 5 character parameter (-Red-/Green/Blue-)
                        chList->cgiHandlerFunc[0](paramBuf);

                    }
                }
#endif

#ifdef HTTP_DYN_HTML_ENABLED
                // The code below replaces data in the HTML page
                // with that generated by the specified functions.
                for(i = 0; i < 9; i++)  // change the range here for more dynamic fields on webpage
                {
                    memset(tempStr,0,sizeof(tempStr));
                    htmlList->dynHtmlFunc[i](tempStr);
                    tempStr[strlen(tempStr)]= ' ';
                    pageReplace((char *)indexPage,
                                (char *)htmlList->dynHtmlParamName[i],
                                (char *)tempStr);
                }
#endif
                viewCounter++;
                sendHTTPData(HTTP_RESP, strlen(HTTP_RESP), client);
                                
                for(i = 0; i < strlen(indexPage); i += HTTP_TX_BLOCK_SIZE)
                {
                    if(strlen(indexPage) - i < HTTP_TX_BLOCK_SIZE)
                    {
                        sendHTTPData(&indexPage[i], strlen(indexPage) - i, client);
                    }
                    else
                    {
                        sendHTTPData(&indexPage[i], HTTP_TX_BLOCK_SIZE, client);
                    }
                }
            }
        }
    }
}

//*****************************************************************************
//
//! \brief  Inserts characters in page that appear after an indicator ind
//! with the value from val
//!
//! \param  page is a pointer to the array holding the page's HTML code
//! \param ind is a pointer to a string that has the name of the parameter on the page to modify
//! \param val is the pointer to a string holding the string to insert in the XXX
//!
//! \return none
//!
//
//*****************************************************************************
void pageReplace(char * page, char * ind, char * val)
{
    char * indicLoc;
    indicLoc = strstr (page,ind);
    memcpy(indicLoc+strlen(ind), val, strlen(val));
}

//*****************************************************************************
//
//! \brief  Returns a string with the number of views of the page
//!
//! \param  str is a pointer to the array where the number of views will be put
//!
//! \return none
//!
//
//*****************************************************************************
void getViewsNum(char * str)
{
    sprintf(str, "%d", viewCounter);
}

//*****************************************************************************
//
//! \brief  Sends HTTP Data
//!
//! \param sdesc is the socket descriptor of the socket used for sending data
//! \param buf is a pointer to the buffer with the data to be sent
//! \param len is the number of bytes to send
//!
//! \return none
//!
//
//*****************************************************************************
void sendHTTPData(char * buf, long len, TCPSocketConnection *client)
{
    int bytesSent = -2;
    while(bytesSent == -2) bytesSent = client->send_all(buf, len);
}