gistfile1.c

#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
#include <PacketSerial.h>


boolean initialized;

PacketSerial serial;

WiFiUDP Udp;

/**
 * MessageFormat:
 * - MessageType: 1 byte = 0
 * - MessageLength: 1 byte
 * - MessageText: n bytes
 * 
 */
void sendMessage(uint8_t code,String message) {
  
}

void sendError(String message) {
  sendMessage(1,message);
}
void sendInfo(String message) {
  sendMessage(0,message);
}


/**
 * MessageFormat:
 * - MessageType: 1 byte = 1
 * - 1 byte WifiSid-Length
 * - N byte WifiSid
 * - 1 byte WifiPassword-Length
 * - N byte WifiPassword
 * - 2 Byte UDP Receive Port
 */

size_t ssidMaxLength=32;
char ssid[ssidMaxLength+1];

size_t passwordMaxLength=64;
char password[passwordMaxLength+1];

 
void doSetup(const uint8_t* buffer, size_t size) {

  if (size<6) {
    sendError("Data too short");
    return;
  }
  
  size_t pos=1;
  uint8_t ssidLength=buffer[pos++];

  if (ssidLength>ssidMaxLength) {
    sendError("SSID is too long");
    return;
  }
  
  if (pos+ssidLength>size) {
    sendError("SSID is longer than data");
    return;
  }

  memcpy(ssid, buffer+pos, ssidLength);
  ssid[ssidLength]=0;

  pos+=ssidLength;
  if (pos+2>=size) {
    sendError("Data too short to contain password");
    return;
  }
  
  uint8_t passwordLength=buffer[pos++];

  if (passwordLength>passwordMaxLength) {
    sendError("Password is too long");
    return;
  }
  
  if (pos+passwordLength>size) {
    sendError("Password is longer than data");
  }

  memcpy(password, buffer+pos, passwordLength);
  password[passwordLength]=0;

  pos+=passwordLength;
  
  if (pos+3>=size) {
    sendError("Data too short to contain receive port");
    return;
  }

  unsigned int receivePort=buffer[pos++]<<8 | buffer[pos++];
}

void onPacket(const uint8_t* buffer, size_t size) {
  if (size<1) return;

  uint8_t msgType=buffer[0];

  switch (msgType) {
    case 1:
      doSetup(buffer,size);
      break;
  }

  
}

void setup() {
  initialized=false;

  serial.setPacketHandler(&onPacket);
  serial.begin(115200);
}


void loop() {
  serial.update();
  
}
/*
 * Sketch für einen ESP-8266 (ESP-01), welcher als Serial/UDP Gateway fungiert:
 * 
 * - verbindet sich mit einem WLAN
 * - Lauscht an einem vorgegebenen UDP-Port und sendet alle empfangenen Nachrichten an den seriellen Port
 * - Sendet alle via seriellem Port eingehende Nachrichten via Broadcast an einen vorgegebenen UDP-Port
 * - Serielles Nachrichtenformat:
 *   - Verwendet die Library "Serialpacket"
 *   - 1. Byte der Nachricht = Typ
 *   - Typ 0: Debug (Outbound-Message)
 *   - Typ 1: Setup (Inbound-Message)
 *     - 1 Byte WifiSid-Length
 *     - N Byte WifiSid
 *     - 1 Byte WifiPassword-Length
 *     - N Byte WifiPassword
 *     - 2 Byte UDP Receive Port
 *   - Typ 2: Status: Connected (Outbound-Message)
 *     - 4 Byte Ip Address
 *   - Typ 3: Status: Disconnected (Outbound-Message)
 *     - no payload
 *   - Typ 4: UDP-Package (Inbound/Outbound-Message)
 *     - 4 Byte remote ip address (Target address for sending, source address for receiving)
 *     - N Byte payload
 */

#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
#include <PacketSerial.h>


boolean initialized;

PacketSerial serial;

WiFiUDP Udp;

/**
 * MessageFormat:
 * - MessageType: 1 byte = 0
 * - MessageLength: 1 byte
 * - MessageText: n bytes
 * 
 */
void sendMessage(uint8_t code,String message) {
  
}

void sendError(String message) {
  sendMessage(1,message);
}
void sendInfo(String message) {
  sendMessage(0,message);
}


/**
 * MessageFormat:
 * - MessageType: 1 byte = 1
 * - 1 byte WifiSid-Length
 * - N byte WifiSid
 * - 1 byte WifiPassword-Length
 * - N byte WifiPassword
 * - 2 Byte UDP Receive Port
 */

size_t ssidMaxLength=32;
char ssid[ssidMaxLength+1];

size_t passwordMaxLength=64;
char password[passwordMaxLength+1];

 
void doSetup(const uint8_t* buffer, size_t size) {

  if (size<6) {
    sendError("Data too short");
    return;
  }
  
  size_t pos=1;
  uint8_t ssidLength=buffer[pos++];

  if (ssidLength>ssidMaxLength) {
    sendError("SSID is too long");
    return;
  }
  
  if (pos+ssidLength>size) {
    sendError("SSID is longer than data");
    return;
  }

  memcpy(ssid, buffer+pos, ssidLength);
  ssid[ssidLength]=0;

  pos+=ssidLength;
  if (pos+2>=size) {
    sendError("Data too short to contain password");
    return;
  }
  
  uint8_t passwordLength=buffer[pos++];

  if (passwordLength>passwordMaxLength) {
    sendError("Password is too long");
    return;
  }
  
  if (pos+passwordLength>size) {
    sendError("Password is longer than data");
  }

  memcpy(password, buffer+pos, passwordLength);
  password[passwordLength]=0;

  pos+=passwordLength;
  
  if (pos+3>=size) {
    sendError("Data too short to contain receive port");
    return;
  }

  unsigned int receivePort=buffer[pos++]<<8 | buffer[pos++];
}

void onPacket(const uint8_t* buffer, size_t size) {
  if (size<1) return;

  uint8_t msgType=buffer[0];

  switch (msgType) {
    case 1:
      doSetup(buffer,size);
      break;
  }

  
}

void setup() {
  initialized=false;

  serial.setPacketHandler(&onPacket);
  serial.begin(115200);
}


void loop() {
  serial.update();
  
}