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Dhcp.h

@@ -0,0 +1,178 @@
+// DHCP Library v0.3 - April 25, 2009
+// Author: Jordan Terrell - blog.jordanterrell.com
+
+#ifndef Dhcp_h
+#define Dhcp_h
+
+#include "UIPUdp.h"
+
+/* DHCP state machine. */
+#define STATE_DHCP_START 0
+#define	STATE_DHCP_DISCOVER	1
+#define	STATE_DHCP_REQUEST	2
+#define	STATE_DHCP_LEASED	3
+#define	STATE_DHCP_REREQUEST	4
+#define	STATE_DHCP_RELEASE	5
+
+#define DHCP_FLAGSBROADCAST	0x8000
+
+/* UDP port numbers for DHCP */
+#define	DHCP_SERVER_PORT	67	/* from server to client */
+#define DHCP_CLIENT_PORT	68	/* from client to server */
+
+/* DHCP message OP code */
+#define DHCP_BOOTREQUEST	1
+#define DHCP_BOOTREPLY		2
+
+/* DHCP message type */
+#define	DHCP_DISCOVER		1
+#define DHCP_OFFER		  2
+#define	DHCP_REQUEST		3
+#define	DHCP_DECLINE		4
+#define	DHCP_ACK		    5
+#define DHCP_NAK		    6
+#define	DHCP_RELEASE		7
+#define DHCP_INFORM		  8
+
+#define DHCP_HTYPE10MB		1
+#define DHCP_HTYPE100MB		2
+
+#define DHCP_HLENETHERNET	6
+#define DHCP_HOPS		0
+#define DHCP_SECS		0
+
+#define MAGIC_COOKIE		0x63825363
+#define MAX_DHCP_OPT	16
+
+#define HOST_NAME "ENC28J"
+#define DEFAULT_LEASE	(900) //default lease time in seconds
+
+#define DHCP_CHECK_NONE         (0)
+#define DHCP_CHECK_RENEW_FAIL   (1)
+#define DHCP_CHECK_RENEW_OK     (2)
+#define DHCP_CHECK_REBIND_FAIL  (3)
+#define DHCP_CHECK_REBIND_OK    (4)
+
+enum
+{
+	padOption		=	0,
+	subnetMask		=	1,
+	timerOffset		=	2,
+	routersOnSubnet		=	3,
+	/* timeServer		=	4,
+	nameServer		=	5,*/
+	dns			=	6,
+	/*logServer		=	7,
+	cookieServer		=	8,
+	lprServer		=	9,
+	impressServer		=	10,
+	resourceLocationServer	=	11,*/
+	hostName		=	12,
+	/*bootFileSize		=	13,
+	meritDumpFile		=	14,*/
+	domainName		=	15,
+	/*swapServer		=	16,
+	rootPath		=	17,
+	extentionsPath		=	18,
+	IPforwarding		=	19,
+	nonLocalSourceRouting	=	20,
+	policyFilter		=	21,
+	maxDgramReasmSize	=	22,
+	defaultIPTTL		=	23,
+	pathMTUagingTimeout	=	24,
+	pathMTUplateauTable	=	25,
+	ifMTU			=	26,
+	allSubnetsLocal		=	27,
+	broadcastAddr		=	28,
+	performMaskDiscovery	=	29,
+	maskSupplier		=	30,
+	performRouterDiscovery	=	31,
+	routerSolicitationAddr	=	32,
+	staticRoute		=	33,
+	trailerEncapsulation	=	34,
+	arpCacheTimeout		=	35,
+	ethernetEncapsulation	=	36,
+	tcpDefaultTTL		=	37,
+	tcpKeepaliveInterval	=	38,
+	tcpKeepaliveGarbage	=	39,
+	nisDomainName		=	40,
+	nisServers		=	41,
+	ntpServers		=	42,
+	vendorSpecificInfo	=	43,
+	netBIOSnameServer	=	44,
+	netBIOSdgramDistServer	=	45,
+	netBIOSnodeType		=	46,
+	netBIOSscope		=	47,
+	xFontServer		=	48,
+	xDisplayManager		=	49,*/
+	dhcpRequestedIPaddr	=	50,
+	dhcpIPaddrLeaseTime	=	51,
+	/*dhcpOptionOverload	=	52,*/
+	dhcpMessageType		=	53,
+	dhcpServerIdentifier	=	54,
+	dhcpParamRequest	=	55,
+	/*dhcpMsg			=	56,
+	dhcpMaxMsgSize		=	57,*/
+	dhcpT1value		=	58,
+	dhcpT2value		=	59,
+	/*dhcpClassIdentifier	=	60,*/
+	dhcpClientIdentifier	=	61,
+	endOption		=	255
+};
+
+typedef struct _RIP_MSG_FIXED
+{
+	uint8_t  op; 
+	uint8_t  htype; 
+	uint8_t  hlen;
+	uint8_t  hops;
+	uint32_t xid;
+	uint16_t secs;
+	uint16_t flags;
+	uint8_t  ciaddr[4];
+	uint8_t  yiaddr[4];
+	uint8_t  siaddr[4];
+	uint8_t  giaddr[4];
+	uint8_t  chaddr[6];
+}RIP_MSG_FIXED;
+
+class DhcpClass {
+private:
+  uint32_t _dhcpInitialTransactionId;
+  uint32_t _dhcpTransactionId;
+  uint8_t  _dhcpMacAddr[6];
+  uint8_t  _dhcpLocalIp[4];
+  uint8_t  _dhcpSubnetMask[4];
+  uint8_t  _dhcpGatewayIp[4];
+  uint8_t  _dhcpDhcpServerIp[4];
+  uint8_t  _dhcpDnsServerIp[4];
+  uint32_t _dhcpLeaseTime;
+  uint32_t _dhcpT1, _dhcpT2;
+  signed long _renewInSec;
+  signed long _rebindInSec;
+  signed long _lastCheck;
+  unsigned long _timeout;
+  unsigned long _responseTimeout;
+  unsigned long _secTimeout;
+  uint8_t _dhcp_state;
+  UIPUDP _dhcpUdpSocket;
+
+  int request_DHCP_lease();
+  void reset_DHCP_lease();
+  void presend_DHCP();
+  void send_DHCP_MESSAGE(uint8_t, uint16_t);
+  void printByte(char *, uint8_t);
+
+  uint8_t parseDHCPResponse(unsigned long responseTimeout, uint32_t& transactionId);
+public:
+  IPAddress getLocalIp();
+  IPAddress getSubnetMask();
+  IPAddress getGatewayIp();
+  IPAddress getDhcpServerIp();
+  IPAddress getDnsServerIp();
+
+  int beginWithDHCP(uint8_t *, unsigned long timeout = 60000, unsigned long responseTimeout = 4000);
+  int checkLease();
+};
+
+#endif