ppp._h

在串口上PPP拨号上网的源程序(实现PPP协议栈)

//开始或结束域
#define PPP_START              0X7E /*ppp包开始标志*/
#define PPP_END                0X7E /*ppp包结束标志*/

//地址域
#define PPP_ADD                0XFF /*全1的广播地址*/

//控制域
#define PPP_COMTROL            0X03 

//协议域
#define PPPID_LCP              0xC021 /*LCP链路控制协议(Link Control Protocol)*/
#define PPPID_IPCP             0x8021 /*IP协议控制协议(Internet Protocol Control Protocol)*/
#define PPPID_CHAP             0xC223 /*CHAP认证协议(CHAP Protocol)*/
#define PPPID_PAP              0xC023 /*PAP认证协议(PAP Protocol)*/
#define PPPID_IP               0x0021 /*IP协议(Internet Protocol)*/
#define PPPID_IPX              0x002b /*IPX协议(Novell IPX Protocol)*/
#define PPPID_TCP              0x002f /*TCP协议(协议头非压缩)*/
#define PPPID_TCPC             0x002d /*TCP协议(协议头压缩)*/

//LCP报文代码域
#define LCP_CONFIG_REQUEST     0X01 /*1 LCP配置请求(Configure-Request) */
#define LCP_CONFIG_ACK         0X02 /*2 LCP配置确认(Configure-Ack) */
#define LCP_CONFIG_NAK         0X03 /*3 LCP配置否定(Configure-Nak) */
#define LCP_CONFIG_REJECT      0X04 /*4 LCP配置拒绝(Configure-Reject) */
#define LCP_TERMINATE_REQUEST  0X05 /*5 LCP终止请求(Terminate-Request) */
#define LCP_TERMINATE_ACK      0X06 /*6 LCP终止确认(Terminate-Ack) */
#define LCP_CODE_REJECT        0X07 /*7 LCP编码拒绝(Code-Reject) */
#define LCP_PROTOCOL_REJECT    0X08 /*8 LCP协议拒绝(Protocol-Reject) */
#define LCP_ECHO_REQUEST       0X09 /*9 LCP回应请求(Echo-Request) */
#define LCP_ECHO_REPLAY        0X0A /*10 LCP回应回答(Echo-Reply) */
#define LCP_DISCARD_REQUEST    0X0B /*11 LCP丢弃请求(Discard-Request) */
#define LCP_RESERVED           0X0C /*12 LCP保留位(reserved)*/

//IPCP报文代码域
#define IPCP_CONFIG_REQUEST    0X01 /*1 IPCP配置请求(Configure-Request) */
#define IPCP_CONFIG_ACK        0X02 /*2 IPCP配置确认(Configure-Ack) */
#define IPCP_CONFIG_NAK        0X03 /*3 IPCP配置否定(Configure-Nak) */
#define IPCP_CONFIG_REJECT     0X04 /*4 IPCP配置拒绝(Configure-Reject) */
#define IPCP_TERMINATE_REQUEST 0X05 /*5 IPCP终止请求(Terminate-Request) */
#define IPCP_TERMINATE_ACK     0X06 /*6 IPCP终止确认(Terminate-Ack) */
#define IPCP_CODE_REJECT       0X07 /*7 IPCP编码拒绝(Code-Reject) */


//LCP报文配置参数类型
#define LCP_OPT_MRU            0X01 /* 1 最大传送单元(maximum receive unit) */
#define LCP_OPT_ASYNC_MAP      0X02 /* 2 同步控制映射表(async control character map) */
#define LCP_OPT_AUTH_PROTO     0x03 /* 3 协议鉴定(authentication protocol) */
#define LCP_OPT_QUAL_PROTO     0x04 /* 4 链路质量检测协议(quality protocol) */
#define LCP_OPT_MAGIC          0x05 /* 5 魔术字(magic number) */
#define LCP_OPT_CBCP           0x06 /* 6 回叫控制(callbackcontrol) */
#define LCP_OPT_PROTO_COMP     0x07 /* 7 协议域压缩(protocol field compression) */
#define LCP_OPT_ADDR_COMP      0x08 /* 8 地址/控制域信息压缩(address/control field compression) */

//PPP状态
#define LINK_NOUSE
#define LINK_INIT
#define LINK_START
#define LINK_OPEN
#define LINK_CLOSE

#define PPP_STATE_INQUIRE      0xff/*PPP状态查询*/  
#define PPP_STATE_UP           0x01/*PPP状态向上跃迁*/
#define PPP_STATE_DOWN         0x00/*PPP状态向下跃迁*/

#define TCP	0x06
#define UDP	0x11

#define DWORD unsigned long
#define BYTE unsigned char
#define WORD unsigned int

#define 	IsESC  	0x01		// Previous character received was a ESC char
#define 	ReSync 	0x04		// Re Synchronize to avoid inconplete IP frame reception
#define 	IsFrame	0x08		// A full packet
#define 	ByteRx 	0x10		// Receive a Byte
#define		LinkOn	0x20		// PPP Link is On

#define ESC	0x7D
#define END	0x7E

#define PPP_BUFFER_SIZE	1200



static BYTE local_magic_num[4]={0x00,0x00,0x00,0x00};  //本地
static BYTE remote_magic_num[4]={0x00,0x00,0x00,0x00}; //远端
extern BYTE InBuffer [PPP_BUFFER_SIZE + 1];	/// Input Buffer for PPP data
extern BYTE OutBuffer[PPP_BUFFER_SIZE + 1];	/// Output Buffer for PPP data

void PPPInit (void);
void Move (BYTE *src, BYTE *dest, register numBYTEs);
void ProcPPPSend (BYTE *Buffer, BYTE len);
void ProcPPPReceive (void);
void PPPEntry (void);
static void HandleLCPOptions (void);
static void HandleIPCPOptions (void);
void LCPREQPacket (WORD MRU);
void RejectProtocol (BYTE *BUFFER);
void IPAssignPacket (void) ;
static WORD PPPfcs16 (WORD fcs, BYTE *cp, int len);
WORD PPPGetChecksum (register unsigned char *cp, register int len);

static const unsigned short fcstab[256] = {
	0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
	0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
	0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
	0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
	0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
	0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
	0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
	0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
	0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
	0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
	0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
	0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
	0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
	0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
	0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
	0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
	0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
	0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
	0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
	0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
	0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
	0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
	0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
	0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
	0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
	0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
	0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
	0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
	0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
	0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
	0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
	0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};