dhcp.c

Wiznet iRadio Source

/*
********************************************************************************
File Include Section
********************************************************************************
*/
#include "71x_lib.h"
#include "socket.h"
#include "eeprom.h"
#include "util.h"
#include "w5100.h"
#include "netconfig.h"
#include "dhcp.h"
#include <stdio.h> 
#include <string.h>


/*
********************************************************************************
Define Part
********************************************************************************
*/

/*
********************************************************************************
Local Variable Declaration Section
********************************************************************************
*/

extern u8 MAC[6];
extern CONFIG_MSG Config_Msg;

u8 DHCP_SIP[4];
u8 DHCP_SHA[6];

u8 OLD_SIP[4];

char dhcp_state;
char retry_count;

un_l2cval lease_time;
u32 my_time, next_time;

u8 DHCP_timeout;
u32 DHCP_XID;


//RIP_MSG * MSG;
RIP_MSG  MSG;

u8 HOST_NAME[] = "WIZNET";
u8 Cip[4] = {0,0,0,0};

extern void (*jump_function)(void);	
/*
********************************************************************************
Function Implementation Part
********************************************************************************
*/
/*
*********************************************************************************************************
*              SEND DHCP DISCOVER
*
* Description: This function sends DHCP DISCOVER message to DHCP server.
* Arguments  : s - is a socket number.
* Returns    : None.
* Note       : 
*********************************************************************************************************
*/
void send_DHCP_DISCOVER(u8 s)
{
	u16 i;
	u8 ip[4];
	u16 k = 0;


	MSG.op = DHCP_BOOTREQUEST;
	MSG.htype = DHCP_HTYPE10MB;
	MSG.hlen = DHCP_HLENETHERNET;
	MSG.hops = DHCP_HOPS;
	MSG.xid = DHCP_XID;
	MSG.secs = DHCP_SECS;
	MSG.flags = DHCP_FLAGSBROADCAST;

	MSG.ciaddr[0] = 0;
	MSG.ciaddr[1] = 0;
	MSG.ciaddr[2] = 0;
	MSG.ciaddr[3] = 0;

	MSG.yiaddr[0] = 0;
	MSG.yiaddr[1] = 0;
	MSG.yiaddr[2] = 0;
	MSG.yiaddr[3] = 0;

	MSG.siaddr[0] = 0;
	MSG.siaddr[1] = 0;
	MSG.siaddr[2] = 0;
	MSG.siaddr[3] = 0;

	MSG.giaddr[0] = 0;
	MSG.giaddr[1] = 0;
	MSG.giaddr[2] = 0;
	MSG.giaddr[3] = 0;

	MSG.chaddr[0] = MAC[0];
	MSG.chaddr[1] = MAC[1];
	MSG.chaddr[2] = MAC[2];
	MSG.chaddr[3] = MAC[3];
	MSG.chaddr[4] = MAC[4];
	MSG.chaddr[5] = MAC[5];

	for (i = 6; i < 16; i++) MSG.chaddr[i] = 0;
	for (i = 0; i < 64; i++) MSG.sname[i] = 0;
	for (i = 0; i < 128; i++) MSG.file[i] = 0;

	// MAGIC_COOKIE
	MSG.OPT[k++] = 0x63;
	MSG.OPT[k++] = 0x82;
	MSG.OPT[k++] = 0x53;
	MSG.OPT[k++] = 0x63;

	// Option Request Param
	MSG.OPT[k++] = dhcpMessageType;
	MSG.OPT[k++] = 0x01;
	MSG.OPT[k++] = DHCP_DISCOVER;
	
	// Client identifier
	MSG.OPT[k++] = dhcpClientIdentifier;
	MSG.OPT[k++] = 0x07;
	MSG.OPT[k++] = 0x01;
	MSG.OPT[k++] = MAC[0];
	MSG.OPT[k++] = MAC[1];
	MSG.OPT[k++] = MAC[2];
	MSG.OPT[k++] = MAC[3];
	MSG.OPT[k++] = MAC[4];
	MSG.OPT[k++] = MAC[5];
	
	// host name
	MSG.OPT[k++] = hostName;
	MSG.OPT[k++] = 9; // length of hostname
	MSG.OPT[k++] = HOST_NAME[0];
	MSG.OPT[k++] = HOST_NAME[1];
	MSG.OPT[k++] = HOST_NAME[2];
	MSG.OPT[k++] = HOST_NAME[3];
	MSG.OPT[k++] = HOST_NAME[4];
	MSG.OPT[k++] = HOST_NAME[5];
	MSG.OPT[k++] = MAC[3];
	MSG.OPT[k++] = MAC[4];
	MSG.OPT[k++] = MAC[5];


	MSG.OPT[k++] = dhcpParamRequest;
	MSG.OPT[k++] = 0x06;	// length of request
	MSG.OPT[k++] = subnetMask;
	MSG.OPT[k++] = routersOnSubnet;
	MSG.OPT[k++] = dns;
	MSG.OPT[k++] = domainName;
	MSG.OPT[k++] = dhcpT1value;
	MSG.OPT[k++] = dhcpT2value;
	MSG.OPT[k++] = endOption;

	for (i = k; i < OPT_SIZE; i++) MSG.OPT[i] = 0;

	// send broadcasting packet
	for (i = 0; i < 4; i++) ip[i] = 255;

	MyPrintf("> send DHCP_DISCOVER\r\n");

	sendto(s, (u8 *)(&MSG.op), RIP_MSG_SIZE, ip, DHCP_SERVER_PORT);

}

/*
*********************************************************************************************************
*              SEND DHCP REQUEST
*
* Description: This function sends DHCP REQUEST message to DHCP server.
* Arguments  : s - is a socket number.
* Returns    : None.
* Note       : 
*********************************************************************************************************
*/
void send_DHCP_REQUEST(u8 s, u8 *Cip, u8 *d_addr)
{
	int i;
	u8 ip[10];
	u16 k = 0;

	MSG.op = DHCP_BOOTREQUEST;
	MSG.htype = DHCP_HTYPE10MB;
	MSG.hlen = DHCP_HLENETHERNET;
	MSG.hops = DHCP_HOPS;
	MSG.xid = DHCP_XID;
	MSG.secs = DHCP_SECS;
	//MSG.flags = DHCP_FLAGSBROADCAST;
	if (d_addr[0] == 0xff) 	MSG.flags = DHCP_FLAGSBROADCAST;
	else MSG.flags = 0;
	
	MSG.ciaddr[0] = Cip[0];
	MSG.ciaddr[1] = Cip[1];
	MSG.ciaddr[2] = Cip[2];
	MSG.ciaddr[3] = Cip[3];

	MSG.yiaddr[0] = 0;
	MSG.yiaddr[1] = 0;
	MSG.yiaddr[2] = 0;
	MSG.yiaddr[3] = 0;

	MSG.siaddr[0] = 0;
	MSG.siaddr[1] = 0;
	MSG.siaddr[2] = 0;
	MSG.siaddr[3] = 0;

	MSG.giaddr[0] = 0;
	MSG.giaddr[1] = 0;
	MSG.giaddr[2] = 0;
	MSG.giaddr[3] = 0;

	MSG.chaddr[0] = MAC[0];
	MSG.chaddr[1] = MAC[1];
	MSG.chaddr[2] = MAC[2];
	MSG.chaddr[3] = MAC[3];
	MSG.chaddr[4] = MAC[4];
	MSG.chaddr[5] = MAC[5];

	for (i = 6; i < 16; i++) MSG.chaddr[i] = 0;
	for (i = 0; i < 64; i++) MSG.sname[i] = 0;
	for (i = 0; i < 128; i++) MSG.file[i] = 0;

	// MAGIC_COOKIE 
	MSG.OPT[k++] = 0x63;
	MSG.OPT[k++] = 0x82;
	MSG.OPT[k++] = 0x53;
	MSG.OPT[k++] = 0x63;

	// Option Request Param.
	MSG.OPT[k++] = dhcpMessageType;
	MSG.OPT[k++] = 0x01;
	MSG.OPT[k++] = DHCP_REQUEST;

	MSG.OPT[k++] = dhcpClientIdentifier;
	MSG.OPT[k++] = 0x07;
	MSG.OPT[k++] = 0x01;
	MSG.OPT[k++] = MAC[0];
	MSG.OPT[k++] = MAC[1];
	MSG.OPT[k++] = MAC[2];
	MSG.OPT[k++] = MAC[3];
	MSG.OPT[k++] = MAC[4];
	MSG.OPT[k++] = MAC[5];

	if (d_addr[0] == 0xff) {
		MSG.OPT[k++] = dhcpRequestedIPaddr;
		MSG.OPT[k++] = 0x04;
		MSG.OPT[k++] = Config_Msg.Lip[0];
		MSG.OPT[k++] = Config_Msg.Lip[1];
		MSG.OPT[k++] = Config_Msg.Lip[2];
		MSG.OPT[k++] = Config_Msg.Lip[3];
	
		MSG.OPT[k++] = dhcpServerIdentifier;
		MSG.OPT[k++] = 0x04;
		MSG.OPT[k++] = DHCP_SIP[0];
		MSG.OPT[k++] = DHCP_SIP[1];
		MSG.OPT[k++] = DHCP_SIP[2];
		MSG.OPT[k++] = DHCP_SIP[3];
	}

	// host name
	MSG.OPT[k++] = hostName;
	MSG.OPT[k++] = 9; // length of hostname
	MSG.OPT[k++] = HOST_NAME[0];
	MSG.OPT[k++] = HOST_NAME[1];
	MSG.OPT[k++] = HOST_NAME[2];
	MSG.OPT[k++] = HOST_NAME[3];
	MSG.OPT[k++] = HOST_NAME[4];
	MSG.OPT[k++] = HOST_NAME[5];
	MSG.OPT[k++] = MAC[3];
	MSG.OPT[k++] = MAC[4];
	MSG.OPT[k++] = MAC[5];
	
	MSG.OPT[k++] = dhcpParamRequest;
	MSG.OPT[k++] = 0x08;
	MSG.OPT[k++] = subnetMask;
	MSG.OPT[k++] = routersOnSubnet;
	MSG.OPT[k++] = dns;
	MSG.OPT[k++] = domainName;
	MSG.OPT[k++] = dhcpT1value;
	MSG.OPT[k++] = dhcpT2value;
	MSG.OPT[k++] = performRouterDiscovery;
	MSG.OPT[k++] = staticRoute;
	MSG.OPT[k++] = endOption;

	for (i = k; i < OPT_SIZE; i++) MSG.OPT[i] = 0;

	// send broadcasting packet
	for (i = 0; i < 4; i++) ip[i] = d_addr[i];

	MyPrintf("> send DHCP_Request\r\n");
	
	sendto(s, (u8 *)(&MSG.op), RIP_MSG_SIZE, ip, DHCP_SERVER_PORT);

}

/*
*********************************************************************************************************
*              SEND DHCP DHCPDECLINE
*
* Description: This function sends DHCP RELEASE message to DHCP server.
* Arguments  : s - is a socket number.
* Returns    : None.
* Note       : 
*********************************************************************************************************
*/
void send_DHCP_DECLINE(u8 s)
{
	int i;
	u8 ip[10];
	u16 k = 0;

	MSG.op = DHCP_BOOTREQUEST;
	MSG.htype = DHCP_HTYPE10MB;
	MSG.hlen = DHCP_HLENETHERNET;
	MSG.hops = DHCP_HOPS;
	MSG.xid = DHCP_XID;
	MSG.secs = DHCP_SECS;
	MSG.flags = 0;

	MSG.ciaddr[0] = 0;
	MSG.ciaddr[1] = 0;
	MSG.ciaddr[2] = 0;
	MSG.ciaddr[3] = 0;

	MSG.yiaddr[0] = 0;
	MSG.yiaddr[1] = 0;
	MSG.yiaddr[2] = 0;
	MSG.yiaddr[3] = 0;

	MSG.siaddr[0] = 0;
	MSG.siaddr[1] = 0;
	MSG.siaddr[2] = 0;
	MSG.siaddr[3] = 0;

	MSG.giaddr[0] = 0;
	MSG.giaddr[1] = 0;
	MSG.giaddr[2] = 0;
	MSG.giaddr[3] = 0;

	MSG.chaddr[0] = MAC[0];
	MSG.chaddr[1] = MAC[1];
	MSG.chaddr[2] = MAC[2];
	MSG.chaddr[3] = MAC[3];
	MSG.chaddr[4] = MAC[4];
	MSG.chaddr[5] = MAC[5];

	for (i = 6; i < 16; i++) MSG.chaddr[i] = 0;
	for (i = 0; i < 64; i++) MSG.sname[i] = 0;
	for (i = 0; i < 128; i++) MSG.file[i] = 0;

	// MAGIC_COOKIE
	MSG.OPT[k++] = 0x63;
	MSG.OPT[k++] = 0x82;
	MSG.OPT[k++] = 0x53;
	MSG.OPT[k++] = 0x63;

	// Option Request Param.
	MSG.OPT[k++] = dhcpMessageType;
	MSG.OPT[k++] = 0x01;
	MSG.OPT[k++] = DHCP_DECLINE;

	MSG.OPT[k++] = dhcpClientIdentifier;
	MSG.OPT[k++] = 0x07;
	MSG.OPT[k++] = 0x01;
	MSG.OPT[k++] = MAC[0];
	MSG.OPT[k++] = MAC[1];
	MSG.OPT[k++] = MAC[2];
	MSG.OPT[k++] = MAC[3];
	MSG.OPT[k++] = MAC[4];
	MSG.OPT[k++] = MAC[5];

	MSG.OPT[k++] = dhcpRequestedIPaddr;
	MSG.OPT[k++] = 0x04;
	MSG.OPT[k++] = Config_Msg.Lip[0];
	MSG.OPT[k++] = Config_Msg.Lip[1];
	MSG.OPT[k++] = Config_Msg.Lip[2];
	MSG.OPT[k++] = Config_Msg.Lip[3];

	MSG.OPT[k++] = dhcpServerIdentifier;
	MSG.OPT[k++] = 0x04;
	MSG.OPT[k++] = DHCP_SIP[0];
	MSG.OPT[k++] = DHCP_SIP[1];
	MSG.OPT[k++] = DHCP_SIP[2];
	MSG.OPT[k++] = DHCP_SIP[3];

	MSG.OPT[k++] = endOption;

	for (i = k; i < OPT_SIZE; i++) MSG.OPT[i] = 0;

	//send broadcasting packet