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178 lines
4.0 KiB
C++
178 lines
4.0 KiB
C++
// DHCP Library v0.3 - April 25, 2009
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// Author: Jordan Terrell - blog.jordanterrell.com
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#ifndef Dhcp_h
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#define Dhcp_h
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#include "EthernetUdp.h"
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/* DHCP state machine. */
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#define STATE_DHCP_START 0
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#define STATE_DHCP_DISCOVER 1
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#define STATE_DHCP_REQUEST 2
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#define STATE_DHCP_LEASED 3
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#define STATE_DHCP_REREQUEST 4
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#define STATE_DHCP_RELEASE 5
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#define DHCP_FLAGSBROADCAST 0x8000
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/* UDP port numbers for DHCP */
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#define DHCP_SERVER_PORT 67 /* from server to client */
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#define DHCP_CLIENT_PORT 68 /* from client to server */
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/* DHCP message OP code */
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#define DHCP_BOOTREQUEST 1
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#define DHCP_BOOTREPLY 2
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/* DHCP message type */
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#define DHCP_DISCOVER 1
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#define DHCP_OFFER 2
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#define DHCP_REQUEST 3
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#define DHCP_DECLINE 4
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#define DHCP_ACK 5
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#define DHCP_NAK 6
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#define DHCP_RELEASE 7
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#define DHCP_INFORM 8
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#define DHCP_HTYPE10MB 1
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#define DHCP_HTYPE100MB 2
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#define DHCP_HLENETHERNET 6
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#define DHCP_HOPS 0
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#define DHCP_SECS 0
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#define MAGIC_COOKIE 0x63825363
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#define MAX_DHCP_OPT 16
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#define HOST_NAME "WIZnet"
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#define DEFAULT_LEASE (900) //default lease time in seconds
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#define DHCP_CHECK_NONE (0)
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#define DHCP_CHECK_RENEW_FAIL (1)
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#define DHCP_CHECK_RENEW_OK (2)
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#define DHCP_CHECK_REBIND_FAIL (3)
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#define DHCP_CHECK_REBIND_OK (4)
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enum
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{
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padOption = 0,
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subnetMask = 1,
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timerOffset = 2,
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routersOnSubnet = 3,
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/* timeServer = 4,
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nameServer = 5,*/
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dns = 6,
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/*logServer = 7,
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cookieServer = 8,
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lprServer = 9,
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impressServer = 10,
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resourceLocationServer = 11,*/
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hostName = 12,
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/*bootFileSize = 13,
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meritDumpFile = 14,*/
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domainName = 15,
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/*swapServer = 16,
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rootPath = 17,
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extentionsPath = 18,
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IPforwarding = 19,
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nonLocalSourceRouting = 20,
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policyFilter = 21,
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maxDgramReasmSize = 22,
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defaultIPTTL = 23,
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pathMTUagingTimeout = 24,
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pathMTUplateauTable = 25,
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ifMTU = 26,
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allSubnetsLocal = 27,
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broadcastAddr = 28,
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performMaskDiscovery = 29,
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maskSupplier = 30,
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performRouterDiscovery = 31,
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routerSolicitationAddr = 32,
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staticRoute = 33,
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trailerEncapsulation = 34,
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arpCacheTimeout = 35,
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ethernetEncapsulation = 36,
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tcpDefaultTTL = 37,
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tcpKeepaliveInterval = 38,
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tcpKeepaliveGarbage = 39,
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nisDomainName = 40,
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nisServers = 41,
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ntpServers = 42,
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vendorSpecificInfo = 43,
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netBIOSnameServer = 44,
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netBIOSdgramDistServer = 45,
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netBIOSnodeType = 46,
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netBIOSscope = 47,
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xFontServer = 48,
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xDisplayManager = 49,*/
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dhcpRequestedIPaddr = 50,
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dhcpIPaddrLeaseTime = 51,
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/*dhcpOptionOverload = 52,*/
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dhcpMessageType = 53,
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dhcpServerIdentifier = 54,
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dhcpParamRequest = 55,
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/*dhcpMsg = 56,
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dhcpMaxMsgSize = 57,*/
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dhcpT1value = 58,
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dhcpT2value = 59,
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/*dhcpClassIdentifier = 60,*/
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dhcpClientIdentifier = 61,
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endOption = 255
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};
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typedef struct __attribute__((packed)) _RIP_MSG_FIXED
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{
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uint8_t op;
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uint8_t htype;
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uint8_t hlen;
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uint8_t hops;
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uint32_t xid;
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uint16_t secs;
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uint16_t flags;
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uint8_t ciaddr[4];
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uint8_t yiaddr[4];
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uint8_t siaddr[4];
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uint8_t giaddr[4];
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uint8_t chaddr[6];
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}RIP_MSG_FIXED;
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class DhcpClass {
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private:
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uint32_t _dhcpInitialTransactionId;
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uint32_t _dhcpTransactionId;
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uint8_t _dhcpMacAddr[6];
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uint8_t _dhcpLocalIp[4];
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uint8_t _dhcpSubnetMask[4];
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uint8_t _dhcpGatewayIp[4];
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uint8_t _dhcpDhcpServerIp[4];
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uint8_t _dhcpDnsServerIp[4];
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uint32_t _dhcpLeaseTime;
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uint32_t _dhcpT1, _dhcpT2;
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unsigned long _renewInSec;
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unsigned long _rebindInSec;
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unsigned long _timeout;
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unsigned long _responseTimeout;
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unsigned long _lastCheckLeaseMillis;
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uint8_t _dhcp_state;
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EthernetUDP _dhcpUdpSocket;
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int request_DHCP_lease();
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void reset_DHCP_lease();
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void presend_DHCP();
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void send_DHCP_MESSAGE(uint8_t, uint16_t);
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void printByte(char *, uint8_t);
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uint8_t parseDHCPResponse(unsigned long responseTimeout, uint32_t& transactionId);
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public:
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IPAddress getLocalIp();
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IPAddress getSubnetMask();
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IPAddress getGatewayIp();
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IPAddress getDhcpServerIp();
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IPAddress getDnsServerIp();
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int beginWithDHCP(uint8_t *, unsigned long timeout = 60000, unsigned long responseTimeout = 4000);
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int checkLease();
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};
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#endif
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