Ok. Heres my code so far:
#include <Base64.h>
#include <SD.h>
#include <SPI.h>
#include <Ethernet.h>
#include <LiquidCrystal.h>
const byte slots = 20;
IPAddress clientIP[slots];
boolean IPUsed[slots];
boolean passEntered[slots];
int currClient;
boolean newClient;
int loginCount[slots];
char encoded[100];
char decoded[100];
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 6, 3, 2);
File accounts;
const char userHeader[] = "<user>";
const char userFooter[] = "</user>";
char permissions[slots];
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
EthernetServer server(80);
void setup()
{
Serial.begin(115200);
pinMode(53, OUTPUT); // change this to 53 on a mega
pinMode(10, OUTPUT); // change this to 53 on a mega
digitalWrite(10,HIGH);
Serial.print("Initializing SD card...");
if (!SD.begin(4)) {
Serial.println("initialization failed!");
return;
}
Serial.println("initialization done.");
lcd.begin(16, 2);
pinMode(8, OUTPUT);
Ethernet.begin(mac);
server.begin();
lcd.print("IP:");
for (byte thisByte = 0; thisByte < 4; thisByte++) {
// print the value of each byte of the IP address:
lcd.print(Ethernet.localIP()[thisByte], DEC);
if(thisByte != 3)
lcd.print(".");
}
}
void loop()
{
EthernetClient client = server.available();
if (client) {
IPAddress temp;
temp = client.remoteIP();
Serial.println(temp);
boolean matched = false;
for(int i = 0; i < slots; i++)
{
if(temp == clientIP[i])
{
Serial.println("returning");
newClient = false;
loginCount[i] ++;
matched = true;
currClient = i;
}
}
if(!matched)
{
for(int i = 0; i < slots; i++)
{
if(!IPUsed[i])
{
Serial.println("new");
newClient = true;
loginCount[i] = 0;
clientIP[i] = temp;
IPUsed[i] = true;
currClient = i;
passEntered[i] = false;
return;
}
}
}
lcd.setCursor(0,1);
lcd.print('C');
lcd.print(currClient);
lcd.print(':');
lcd.println(clientIP[currClient]);
boolean currentLineIsBlank = true;
String buffer = "";
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.print(c);
buffer+=c;
if (c == '\n' && currentLineIsBlank) {
if(passEntered[currClient])
{
drawUser(client);
}
else
{
drawPass(client);
}
break;
}
if (c == '\n') {
currentLineIsBlank = true;
buffer="";
} else if (c == '\r') {
if((loginCount[currClient] > 1) && (buffer.indexOf("Authorization: Basic ") >= 0))
{
for(int i = buffer.indexOf("Authorization: Basic ")+21; i < buffer.length()-1; i++)
{
encoded[i-(buffer.indexOf("Authorization: Basic ")+21)] = buffer[i];
}
base64_decode(decoded , encoded , buffer.length() - 21 - 1);
accounts = SD.open("accounts.txt");
if (accounts)
{
Serial.print("reading accounts.txt...");
int userStart = -1;
int userEnd = -1;
boolean failed = false;
while(!passEntered[currClient] && !failed )
{
boolean found = false;
unsigned long i = userStart + 1;
while(!found)
{
if(!accounts.seek(i))
{
found = true;
failed = true;
}
char buf[10];
accounts.read(buf, 6);
if(strncmp(buf, userHeader, 6) == 0)
{
userStart = i;
found = true;
}
i++;
}
found = false;
i = userEnd + 1;
while(!found)
{
if(!accounts.seek(i))
{
found = true;
failed = true;
}
char buf[10];
accounts.read(buf, 7);
if(strncmp(buf, userFooter, 7) == 0)
{
userEnd = i;
found = true;
}
i++;
}
if(!failed)
{
accounts.seek(userStart + 6);
passEntered[currClient] = true;
i = 0;
while(accounts.position() != userEnd-2)
{
Serial.print(accounts.peek());
if(decoded[i] != accounts.read())
{
passEntered[currClient] = false;
}
i++;
}
if(passEntered[currClient])
{
int tempPos = accounts.position();
accounts.seek(userEnd - 1);
permissions[currClient] = accounts.read();
accounts.seek(tempPos);
}
}
}
accounts.close();
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
}
if( passEntered[currClient])
{
if(buffer.indexOf("GET /?status=1")>=0)
digitalWrite(8,HIGH);
if(buffer.indexOf("GET /?status=0")>=0)
digitalWrite(8,LOW);
}
}
else {
currentLineIsBlank = false;
}
}
}
client.stop();
}
}
void drawUser(EthernetClient client)
{
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println();
client.print("<BODY BGCOLOR=#000000 TEXT=#FFFFFF LINK=#FFFFFF VLINK=#FFFFFF>");
client.print("<font color='blue' size=7>Welcome ");
if(permissions[currClient] == 'u')
client.print("user ");
if(permissions[currClient] == 'a')
client.print("admin ");
client.print(currClient);
client.print(" </font>");
client.println("<br />");
client.println("<br />");
if (digitalRead(8)){
client.print(" LED is <font color='green'>ON</font>");
}else{
client.print(" LED is <font color='red'>OFF</font>");
}
client.println("<br />");
client.print("<FORM action=\"http://");
client.print(Ethernet.localIP()[0]);
client.print(".");
client.print(Ethernet.localIP()[1]);
client.print(".");
client.print(Ethernet.localIP()[2]);
client.print(".");
client.print(Ethernet.localIP()[3]);
client.print("/\" >");
client.print("<P> <INPUT type=\"radio\" name=\"status\" value=\"1\">ON");
client.print("<P> <INPUT type=\"radio\" name=\"status\" value=\"0\">OFF");
client.print("<P> <INPUT type=\"submit\" value=\"Submit\"> ");
client.print("</FORM>");
}
void drawPass(EthernetClient client)
{
client.println("HTTP/1.1 401 Access Denied");
client.println("WWW-Authenticate: Basic realm=\"a\"");
client.println("Content-Type: text/html");
client.println();
client.print("<BODY BGCOLOR=#000000 TEXT=#FFFFFF LINK=#FFFFFF VLINK=#FFFFFF>");
client.print("ERROR: ACCESS DENIED");
}
Basically it is a password protected led on pin 8. all of the users are stored on a SD card in a file "accounts.txt" with the format of:
