#define TCP_GLOBALS
#include "config.h"
#include "../include/cfg_net.h"
OS_EVENT *AppSemSend[MAX_TCP_LINKS];
OS_EVENT *AppSemCon[MAX_TCP_LINKS];
OS_EVENT *AppSemDisc[MAX_TCP_LINKS];
struct Socket_Type TcpStatus[MAX_TCP_LINKS];
tcp_send Tcp_Packed;
/**********************************************************************
**函数原型: unsigned int CheckSum(unsigned int xdata *check,unsigned int length)
**入口参数:� check : 被校验数据起始地址
length : 被校验数据长度,单位字
**出口参数: 无
**返 回 值: ~((sum)&0xffff))
**说 明: 计算校验和
************************************************************************/
//=================================================================================
uint16 CheckSumTcp1(uint8 num,uint16 length)
{
uint32 sum=0;
uint16 i;
for (i=0;i<6;i++)
{
sum = sum + ((uint32)TcpStatus[num].TcpDHeadUint8[2*i]<<8)+(uint32)TcpStatus[num].TcpDHeadUint8[2*i+1];
}
length=length-12;
i=0;
while(i<(length/2))
{
sum = sum + ((uint32)TcpStatus[num].TcpHeadUint8[2*i]<<8)+(uint32)TcpStatus[num].TcpHeadUint8[2*i+1];
i++;
}
if(length&0x0001)//长度为奇数个时,要进行该操作
{
//sum = sum + (uint32)(TcpStatus[num].TcpHeadUint8[2*i])<<8;
sum = sum + (uint32)(TcpStatus[num].TcpHeadUint8[2*i])*256;
}
sum = (sum&0x0000ffff) + ((sum>>16)&0x0000ffff);//高16位和低16位相加
if(sum & 0xffff0000)
{//表示有进位
sum++;
if(sum & 0xffff0000)
{//表示有进位
sum++;
}
}
return ( (uint16)(~((sum)&0xffff)) );
}
void Tcp_Initial(void)
{
uint8 i;
for(i=0;i<MAX_TCP_LINKS;i++)
{
TcpStatus[i].Dest_Port=0;
TcpStatus[i].My_Port=0;
TcpStatus[i].State=TCP_STATE_CLOSED;
TcpStatus[i].StaSem=0;
TcpStatus[i].Send_Next=0;
TcpStatus[i].ResendTime=0;
TcpStatus[i].ResendState=0;
TcpStatus[i].RecPassSeq=0;
TcpStatus[i].SenPassSeq=0;
TcpStatus[i].SenFutureSeq=0;
TcpStatus[i].RecPassAck=0;
TcpStatus[i].SenPassAck=0;
TcpStatus[i].RecFutureAck=0;
TcpStatus[i].Snd_Window=MAX_TCP_DATA;
TcpStatus[i].TcpDataQWrPtr=0;
TcpStatus[i].TcpDataQRdPtr=0;
AppSemSend[i]= OSSemCreate(0);
AppSemCon[i]= OSSemCreate(0);
AppSemDisc[i]= OSSemCreate(0);
}
Tcp_Packed.TcpDHead.rev=0;
Tcp_Packed.TcpDHead.NextProtocal=6;
}
/**********************************************************************
**函数原型: void Send_Reset()
**入口参数: 无
**出口参数: 无
**返 回 值: 无
**功能说明: 发送TCP_RST数据报文,复位对方连接
******************************************************************/
void Send_Reset(uint8 num)
{
uint16 i;
struct _pkst TxdData;
i=Tcp_Packed.Tcp.SourcePort;
Tcp_Packed.Tcp.SourcePort=Tcp_Packed.Tcp.DestPort;
Tcp_Packed.Tcp.DestPort=i;
Tcp_Packed.Tcp.offset=0x50;
Tcp_Packed.Tcp.window=TcpStatus[num].Snd_Window;
Tcp_Packed.Tcp.urg=0;
Tcp_Packed.Tcp.Crc=0;
/*
Tcp_Packed.Tcp.tcpdata[0]=0X02;
Tcp_Packed.Tcp.tcpdata[1]=0X04;
Tcp_Packed.Tcp.tcpdata[2]=MAX_TCP_DATA/256;
Tcp_Packed.Tcp.tcpdata[3]=MAX_TCP_DATA%256;
Tcp_Packed.Tcp.tcpdata[4]=0X01;
Tcp_Packed.Tcp.tcpdata[5]=0X01;
Tcp_Packed.Tcp.tcpdata[6]=0X01;
Tcp_Packed.Tcp.tcpdata[7]=0X01;*/
//*********添加TCP假头**********//
Tcp_Packed.TcpDHead.rev=0;
Tcp_Packed.TcpDHead.NextProtocal=6;
Tcp_Packed.TcpDHead.TotalLen=20;
//Tcp_Packed.Tcp.Crc=CheckSumTcp((uint16 EX_RAM *)&Tcp_Packed,Tcp_Packed.TcpDHead.TotalLen+12);
TxdData.STPTR=NULL;
TxdData.length=Tcp_Packed.TcpDHead.TotalLen;
TxdData.DAPTR=(uint8 EX_RAM *)&Tcp_Packed.Tcp;
Send_Ip_Frame
(
&TxdData,
TcpStatus[num].Dest_Ip,
TcpStatus[num].My_Ip,
6
);
//memcpy (&(TcpStatus[num].resend_data),&(Tcp_Packed.Tcp) , Tcp_Packed.TcpDHead.TotalLen);
TcpStatus[num].ResendLength=Tcp_Packed.TcpDHead.TotalLen;
}
/**********************************************************************
**函数原型: void Delete_Socket()
**入口参数: 无
**出口参数: 无
**返 回 值: 无
**功能说明: 撤销本地连接,并清空重发缓冲区
******************************************************************/
void Delete_Socket(uint8 num)
{
uint16 i;
OS_ENTER_CRITICAL();
if((TcpStatus[num].StaSem&0x80)==0x80)
{
TcpStatus[num].State=TCP_STATE_LISTEN;
TcpStatus[num].StaSem=0x82;
}
else
{
TcpStatus[num].State=TCP_STATE_CLOSED;
TcpStatus[num].StaSem=0;
TcpStatus[num].My_Port=0;
TcpStatus[num].My_Ip[0]=0;
TcpStatus[num].My_Ip[1]=0;
TcpStatus[num].My_Ip[2]=0;
TcpStatus[num].My_Ip[3]=0;
}
do
{
i=OSSemAccept(AppSemCon[num]);
}while(i!=0);
do
{
i=OSSemAccept(AppSemSend[num]);
}while(i!=0);
do
{
i=OSSemAccept(AppSemDisc[num]);
}while(i!=0);
TcpStatus[num].RecPassSeq=0;
TcpStatus[num].RecPassAck=0;
TcpStatus[num].SenPassSeq=0;
TcpStatus[num].SenPassAck=0;
TcpStatus[num].RecFutureAck=0;
TcpStatus[num].SenFutureSeq=0;
TcpStatus[num].ResendState=0;//表示该重发缓冲区没有数据
TcpStatus[num].ResendTime=0;
TcpStatus[num].Dest_Port=0;
TcpStatus[num].Dest_Ip[0]=0;
TcpStatus[num].Dest_Ip[1]=0;
TcpStatus[num].Dest_Ip[2]=0;
TcpStatus[num].Dest_Ip[3]=0;
TcpStatus[num].TcpDataQWrPtr=0;
TcpStatus[num].TcpDataQRdPtr=0;
OS_EXIT_CRITICAL();
}
void Tcp_Listen(uint8 num)
{
static uint32 initalseq=32451;
struct _pkst TxdData;
if(Tcp_Packed.Tcp.control&TCP_SYN)
{
TcpStatus[num].State=TCP_STATE_SYN_RCVD;//TCP_STATE_SYN_RCVD;//Tcp_SYN_Rec;
//TcpStatus[num].Dest_Ip[0]=Tcp_Packed.TcpDHead.DestId[0];
//TcpStatus[num].Dest_Ip[1]=Tcp_Packed.TcpDHead.DestId[1];
//TcpStatus[num].Dest_Ip[2]=Tcp_Packed.TcpDHead.DestId[2];
//TcpStatus[num].Dest_Ip[3]=Tcp_Packed.TcpDHead.DestId[3];
TcpStatus[num].Dest_Port=Tcp_Packed.Tcp.SourcePort;//对方端口
//TcpStatus[num].My_Port=Tcp_Packed.Tcp.DestPort;
TcpStatus[num].IRS=Tcp_Packed.Tcp.SeqNum;//对方的初始化顺序号
TcpStatus[num].RecPassSeq=Tcp_Packed.Tcp.SeqNum;
TcpStatus[num].RecPassAck=0;
TcpStatus[num].SenPassSeq=initalseq;
TcpStatus[num].SenPassAck=TcpStatus[num].RecPassSeq+1;
TcpStatus[num].RecFutureAck=initalseq+1;
TcpStatus[num].SenFutureSeq=initalseq+1;
TcpStatus[num].Rcv_Next=Tcp_Packed.Tcp.SeqNum+1;//对方的顺序号,用于确认
TcpStatus[num].ISS=TcpStatus[num].Send_Next;//我的初始化顺序号
TcpStatus[num].Sent_UnAck=TcpStatus[num].ISS;//我的未确认得序号
TcpStatus[num].Send_Next=TcpStatus[num].ISS+1;//我的顺序号,用于发送
TcpStatus[num].My_Wl1=Tcp_Packed.Tcp.SeqNum;//seq
TcpStatus[num].My_Wl2=TcpStatus[num].Send_Next;
TcpStatus[num].Rcv_Window=Tcp_Packed.Tcp.window;//对方的WINDOW大小
TcpStatus[num].Snd_Window=MAX_TCP_DATA;//通知对方本地最大接收1024字节的包,用于流控
TcpStatus[num].Dest_Max_Seg_Size=MAX_TCP_DATA;//默认为560
if(Tcp_Packed.Tcp.offset>50)
if(Tcp_Packed.Tcp.tcpdata[0]==0x02)
if(Tcp_Packed.Tcp.tcpdata[1]==0x04) //0204为最大segment选项
{
TcpStatus[num].Dest_Max_Seg_Size=Tcp_Packed.Tcp.tcpdata[2]*256+Tcp_Packed.Tcp.tcpdata[3];
}
TcpStatus[num].My_Max_Seg_Size=MAX_TCP_DATA;//本地机可以接受最大的以太网数据包
//********************************************//
TcpStatus[num].TcpHeadUint8[0]=(TcpStatus[num].My_Port&0xff00)>>8;
TcpStatus[num].TcpHeadUint8[1]=TcpStatus[num].My_Port&0x00ff;
Tcp_Packed.Tcp.SourcePort=TcpStatus[num].My_Port;
TcpStatus[num].TcpHeadUint8[2]=(TcpStatus[num].Dest_Port&0xff00)>>8;
TcpStatus[num].TcpHeadUint8[3]=TcpStatus[num].Dest_Port&0x00ff;
Tcp_Packed.Tcp.DestPort=TcpStatus[num].Dest_Port;
TcpStatus[num].TcpHeadUint8[4]=(TcpStatus[num].SenPassSeq&0xff000000)>>24;
TcpStatus[num].TcpHeadUint8[5]=(TcpStatus[num].SenPassSeq&0x00ff0000)>>16;
TcpStatus[num].TcpHeadUint8[6]=(TcpStatus[num].SenPassSeq&0x0000ff00)>>8;
TcpStatus[num].TcpHeadUint8[7]=(TcpStatus[num].SenPassSeq&0x000000ff);
Tcp_Packed.Tcp.SeqNum=TcpStatus[num].ISS;
TcpStatus[num].TcpHeadUint8[8]=(TcpStatus[num].SenPassAck&0xff000000)>>24;
TcpStatus[num].TcpHeadUint8[9]=(TcpStatus[num].SenPassAck&0x00ff0000)>>16;
TcpStatus[num].TcpHeadUint8[10]=(TcpStatus[num].SenPass
基于LPC2132的ZLG的IP协议包,包括SOCKET,UDP以及TCP协议等.zip
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