File content as of revision 7:b36422ef864f:

/**
 * XBee Wi-Fi library for mbed
 * Copyright (c) 2011 Hiroshi Suga
 * Released under the MIT License: http://mbed.org/license/mit
 */

/** @file
 * @brief XBee Wi-Fi library for mbed
 */

#include "XBee_conf.h"
#ifdef ENABLE_XBEE_WIFI

#ifndef XBeeWiFi_h
#define XBeeWiFi_h

#include "mbed.h"
#include "EthernetNetIf.h"
#include "XBee.h"
#include <inttypes.h>

#undef USE_WIFIDNS

// the non-variable length of the frame data (not including frame id or api id or variable data size (e.g. payload, at command set value)
#define IPv4_TRANSMIT_REQUEST_API_LENGTH 10

/**
 * Api Id constants
 */
#define IPv4_TRANSMIT_REQUEST 0x20
#define IPv4_RX_FRAME 0xb0
#define IPv4_TRANSMIT_STATUS 0x89

/// status
#define MAC_FAILUE 0x01
#define PHYSICAL_ERROR 0x04
#define NETWORK_ACK_FAILUE 0x21
#define NOT_ASSOCIATED 0x22
#define NO_RESOURCES 0x32
#define CONNECTIONS_FAILUE 0x76

/// protocol
#define PROTOCOL_UDP 0
#define PROTOCOL_TCP 1

/// option
#define OPTION_LEAVEOPEN 1

/// security
#define SECURITY_OPEN 0
#define SECURITY_WPA 1
#define SECURITY_WPA2 2
#define SECURITY_WEP40 3
#define SECURITY_WEP104 4

/// modem status
#define JOINED_AP 0
#define INITIALIZATION 0x01
#define SSID_NOT_FOUND 0x22
#define SSID_NOT_CONFIGURED 0x23
#define JOIN_FAILED 0x27
#define WAITING_IPADDRESS 0x41
#define WAITING_SOCKETS 0x42
#define SCANNING_SSID 0xff

/// dns
#define DNS_QUERY_A 1
#define DNS_QUERY_NS 2
#define DNS_QUERY_CNAME 5
#define DNS_QUERY_PTR 12
#define DNS_QUERY_MX 15
#define DNS_QUERY_AAAA 28
#define DNS_QUERY_ANY 255
#define DNS_CLASS_IN 1

#define DNS_PORT 53
#define DNS_SRC_PORT 10053
#define DNS_TIMEOUT 15000 // ms

struct DNSHeader {
        uint16_t id; 
        uint16_t flags; 
        uint16_t questions; 
        uint16_t answers; 
        uint16_t authorities; 
        uint16_t additional; 
};

struct DnsQuestionEnd { 
        uint16_t type; 
        uint16_t clas; 
};

struct DnsAnswer {
        uint16_t name; 
        uint16_t type; 
        uint16_t clas; 
        uint32_t ttl; 
        uint16_t length; 
} __attribute__((packed)); 


/**
 * Primary interface for communicating with an XBee Wi-Fi.
 */
class XBeeWiFi : public XBee {
public:
    XBeeWiFi (PinName p_tx, PinName p_rx, PinName p_cts, PinName p_rts);

    int setup (int security, const char *ssid, const char *pin);
    int setup (const char *ssid);
    int reset ();
    int baud (int b);
    int setAddress ();
    int setAddress (IpAddr &ipaddr, IpAddr &netmask, IpAddr &gateway, IpAddr &nameserver);
    int getAddress (IpAddr &ipaddr, IpAddr &netmask, IpAddr &gateway, IpAddr &nameserver);
    int setTimeout (int timeout);
    int getStatus ();
    int getWiResponse (int apiId, int frameid = 0, int timeout = 3000);
#ifdef USE_WIFIDNS
    int setNameserver (IpAddr &nameserver, int port);
    int getHostByName (const char* name, IpAddr &addr);
#endif
    /**
     * Call with instance of AtCommandResponse only if getApiId() == AT_COMMAND_RESPONSE
     */
//    void getIPV4RxFrame (XBeeResponse &responses);

protected:
    int getWiAddr (IpAddr &ipaddr);
#ifdef USE_WIFIDNS
    int createDnsRequest (const char* name, char *buf);
    int getDnsResponse (const uint8_t *buf, int len, IpAddr &addr);
#endif

private:
    IpAddr _nameserver;
    int _nameport;
};

/**
 * Represents a Wi-Fi TX packet that corresponds to Api Id: IPv4_TRANSMIT_REQUEST
 */
class IPv4TransmitRequest : public PayloadRequest {
public:
    /**
     * Creates a unicast IPv4TransmitRequest with the DEFAULT_FRAME_ID
     */
    IPv4TransmitRequest(IpAddr &dstAddr, uint16_t dstPort, uint16_t srcPort, uint8_t protocol, uint8_t option, uint8_t *data, uint16_t dataLength, uint8_t frameId);
    IPv4TransmitRequest(IpAddr &dstAddr, uint16_t dstPort, uint8_t *data, uint16_t dataLength);
    /**
     * Creates a default instance of this class.  At a minimum you must specify
     * a payload, payload length and a destination address before sending this request.
     */
    IPv4TransmitRequest();
    IpAddr& getAddress();
    uint16_t getDstPort();
    uint16_t getSrcPort();
    uint8_t getProtocol();
    uint8_t getOption();
    void setAddress(IpAddr& dstAddr);
    void setDstPort(uint16_t dstPort);
    void setSrcPort(uint16_t srcPort);
    void setProtocol(uint8_t protocol);
    void setOption(uint8_t option);
protected:
    // declare virtual functions
    virtual uint8_t getFrameData(uint16_t pos);
    virtual uint16_t getFrameDataLength();
private:
    IpAddr _dstAddr;
    uint16_t _dstPort;
    uint16_t _srcPort;
    uint8_t _protocol;
    uint8_t _option;
};

/**
 * Represents a Wi-Fi TX status packet
 */
class Transmit_Status : public FrameIdResponse {
public:
    Transmit_Status();
    uint8_t getStatus();
    bool isSuccess();
};

/**
 * Represents a Wi-Fi RX packet
 */
class IPV4RxFrame : public RxDataResponse {
public:
    IPV4RxFrame();
    IpAddr& getSrcAddress();
    uint16_t getDstPort();
    uint16_t getSrcPort();
    uint8_t getProtocol();
    uint8_t getStatus();
    virtual uint16_t getDataLength();
    // frame position where data starts
    virtual uint8_t getDataOffset();
private:
    IpAddr _srcAddr;
};

#endif //XBeeWiFi_h
#endif