netppp.c

基于东南大学开发的SEP3203的ARM7中的所有驱动

/*****************************************************************************

* netppp.c - Network Point to Point Protocol program file.

*

* portions Copyright (c) 1997 by Global Election Systems Inc.

*

* The authors hereby grant permission to use, copy, modify, distribute,

* and license this software and its documentation for any purpose, provided

* that existing copyright notices are retained in all copies and that this

* notice and the following disclaimer are included verbatim in any 

* distributions. No written agreement, license, or royalty fee is required

* for any of the authorized uses.

*

* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR

* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 

* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*

******************************************************************************

* REVISION HISTORY

*

* 97-11-05 Guy Lancaster <[e-mail]>, Global Election Systems Inc.

*	Original.

*****************************************************************************/



/*

 * ppp_defs.h - PPP definitions.

 *

 * if_pppvar.h - private structures and declarations for PPP.

 *

 * Copyright (c) 1994 The Australian National University.

 * All rights reserved.

 *

 * Permission to use, copy, modify, and distribute this software and its

 * documentation is hereby granted, provided that the above copyright

 * notice appears in all copies.  This software is provided without any

 * warranty, express or implied. The Australian National University

 * makes no representations about the suitability of this software for

 * any purpose.

 *

 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY

 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES

 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF

 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY

 * OF SUCH DAMAGE.

 *

 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,

 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY

 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS

 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO

 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,

 * OR MODIFICATIONS.

 */



/*

 * if_ppp.h - Point-to-Point Protocol definitions.

 *

 * Copyright (c) 1989 Carnegie Mellon University.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms are permitted

 * provided that the above copyright notice and this paragraph are

 * duplicated in all such forms and that any documentation,

 * advertising materials, and other materials related to such

 * distribution and use acknowledge that the software was developed

 * by Carnegie Mellon University.  The name of the

 * University may not be used to endorse or promote products derived

 * from this software without specific prior written permission.

 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

 */



#include <string.h>

#include "netconf.h"

#include "net.h"

#include "netrand.h"

#include "netbuf.h"

#include "netfsm.h"

#if PAP_SUPPORT > 0

#include "netpap.h"

#endif

#if CHAP_SUPPORT > 0

#include "netchap.h"

#endif

#include "netipcp.h"

#include "netlcp.h"

#include "netiphdr.h"		/* Required for netvj.h. */

#if VJ_SUPPORT > 0

#include "netvj.h"

#endif

#include "netppp.h"



#include "net.h"

#include "netdial.h"

#include "netppp.h"

#include "devio.h"

//#include "tcpecho.h"

//#include "udpclient.h"

#include "netppp.h"



#include <asixwin.h>

#include <sys\devmng.h>

#include "protocal.h"



/* Upper layer protocols. */

#include "netip.h"



/* Lower layer interfaces. */

#include "devio.h"



//#include <string.h>

#include <stdio.h>

#include "netdebug.h"









/*************************/

/*** LOCAL DEFINITIONS ***/

/*************************/

/*

 *	Configuration parameters.

 */

#define MAXIDLEFLAG	500					/* Max Xmit idle time before resend flag char. */

#define MAXKILLDELAY TICKSPERSEC		/* Max delay jiffys before PPP task checks kill. */

//#define STACK_SIZE NETSTACK+512		/* Enough to handle printf's. */



#define MAX_IFS		32





/*

 * The basic PPP frame.

 */

#define PPP_HDRLEN	4			/* octets for standard ppp header */

#define PPP_FCSLEN	2			/* octets for FCS */

#define PPP_ADDRESS(p)	(((u_char *)(p))[0])

#define PPP_CONTROL(p)	(((u_char *)(p))[1])

#define PPP_PROTOCOL(p)	((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])



/* PPP packet parser states.  Current state indicates operation yet to be

 * completed. */

typedef enum {

	PDIDLE = 0,					/* Idle state - waiting. */

	PDSTART,					/* Process start flag. */

	PDADDRESS,					/* Process address field. */

	PDCONTROL,					/* Process control field. */

	PDPROTOCOL1,				/* Process protocol field 1. */

	PDPROTOCOL2,				/* Process protocol field 2. */

	PDDATA						/* Process data byte. */

} PPPDevStates;



/* Special character codes. */

#define PPPFLAG 0x7e			/* Flag character. */

#define PPPESCAPE 0x7d			/* Escape character. */

#define PPPESCMASK 0x20			/* Mask to x-or with escaped character. */

#define PPPADDRESS 0xff			/* All-stations address. */

#define PPPCONTROL 0x03			/* Unnumbered info. */

/*

 * Significant octet values.

 */

#define	PPP_ALLSTATIONS	0xff	/* All-Stations broadcast address */

#define	PPP_UI		0x03		/* Unnumbered Information */

#define	PPP_FLAG	0x7e		/* Flag Sequence */

#define	PPP_ESCAPE	0x7d		/* Asynchronous Control Escape */

#define	PPP_TRANS	0x20		/* Asynchronous transparency modifier */



/*

 * Protocol field values.

 */

#define PPP_IP		0x21		/* Internet Protocol */

#define	PPP_XNS		0x25		/* Xerox NS */

#define PPP_AT		0x29		/* AppleTalk Protocol */

#define PPP_IPX		0x2b		/* IPX Datagram (RFC1552) */

#define	PPP_VJC_COMP	0x2d	/* VJ compressed TCP */

#define	PPP_VJC_UNCOMP	0x2f	/* VJ uncompressed TCP */

#define PPP_COMP	0xfd		/* compressed packet */

#define PPP_IPCP	0x8021		/* IP Control Protocol */

#define PPP_ATCP	0x8029		/* AppleTalk Control Protocol */

#define PPP_IPXCP	0x802b		/* IPX Control Protocol (RFC1552) */

#define PPP_CCP		0x80fd		/* Compression Control Protocol */

#define PPP_LCP		0xc021		/* Link Control Protocol */

#define PPP_PAP		0xc023		/* Password Authentication Protocol */

#define PPP_LQR		0xc025		/* Link Quality Report protocol */

#define PPP_CHAP	0xc223		/* Cryptographic Handshake Auth. Protocol */

#define PPP_CBCP	0xc029		/* Callback Control Protocol */



/*

 * Values for FCS calculations.

 */

#define PPP_INITFCS	0xffff		/* Initial FCS value */

#define PPP_GOODFCS	0xf0b8		/* Good final FCS value */

#define PPP_FCS(fcs, c)	(((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])



/*

 * Bit definitions for flags.

 */

#define SC_COMP_PROT	0x00000001	/* protocol compression (output) */

#define SC_COMP_AC		0x00000002	/* header compression (output) */

#define	SC_COMP_TCP		0x00000004	/* TCP (VJ) compression (output) */

#define SC_NO_TCP_CCID	0x00000008	/* disable VJ connection-id comp. */

#define SC_REJ_COMP_AC	0x00000010	/* reject adrs/ctrl comp. on input */

#define SC_REJ_COMP_TCP	0x00000020	/* reject TCP (VJ) comp. on input */

#define SC_CCP_OPEN		0x00000040	/* Look at CCP packets */

#define SC_CCP_UP		0x00000080	/* May send/recv compressed packets */

#define SC_DEBUG		0x00010000	/* enable debug messages */

#define SC_LOG_INPKT	0x00020000	/* log contents of good pkts recvd */

#define SC_LOG_OUTPKT	0x00040000	/* log contents of pkts sent */

#define SC_LOG_RAWIN	0x00080000	/* log all chars received */

#define SC_LOG_FLUSH	0x00100000	/* log all chars flushed */

#define SC_RCV_B7_0		0x01000000	/* have rcvd char with bit 7 = 0 */

#define SC_RCV_B7_1		0x02000000	/* have rcvd char with bit 7 = 1 */

#define SC_RCV_EVNP		0x04000000	/* have rcvd char with even parity */

#define SC_RCV_ODDP		0x08000000	/* have rcvd char with odd parity */

#define	SC_MASK			0x0fff00ff	/* bits that user can change */



/*

 * State bits in sc_flags, not changeable by user.

 */

#define SC_TIMEOUT		0x00000400	/* timeout is currently pending */

#define SC_VJ_RESET		0x00000800	/* need to reset VJ decomp */

#define SC_COMP_RUN		0x00001000	/* compressor has been initiated */

#define SC_DECOMP_RUN	0x00002000	/* decompressor has been initiated */

#define SC_DC_ERROR		0x00004000	/* non-fatal decomp error detected */

#define SC_DC_FERROR	0x00008000	/* fatal decomp error detected */

#define SC_TBUSY		0x10000000	/* xmitter doesn't need a packet yet */

#define SC_PKTLOST		0x20000000	/* have lost or dropped a packet */

#define	SC_FLUSH		0x40000000	/* flush input until next PPP_FLAG */

#define	SC_ESCAPED		0x80000000	/* saw a PPP_ESCAPE */





                                                                                                                                        

/************************/

/*** LOCAL DATA TYPES ***/

/************************/

/*

 * PPP interface control block.

 */

typedef struct PPPControl_s {

	char ifname[IFNAMSIZ];				/* Interface name */

	char openFlag;						/* True when in use. */

	char oldFrame;						/* Old framing character for fd. */

	int  fd;							/* File device ID of port. */

	int  kill_link;						/* Shut the link down. */

	int  if_up;							/* True when the interface is up. */

	int  errCode;						/* Code indicating why interface is down. */

	NBuf *inHead, *inTail;				/* The input packet. */

	PPPDevStates inState;				/* The input process state. */

	char inEscaped;						/* Escape next character. */

	u_int inProtocol;					/* The input protocol code. */

	u_int inFCS;						/* Input Frame Check Sequence value. */

	u_int inLen;						/* Input packet length. */

	int  mtu;							/* Peer's mru */

	int  pcomp;							/* Does peer accept protocol compression? */

	int  accomp;						/* Does peer accept addr/ctl compression? */

	u_long lastXMit;					/* Time of last transmission. */

	ext_accm inACCM;					/* Async-Ctl-Char-Map for input. */

	ext_accm outACCM;					/* Async-Ctl-Char-Map for output. */

#if VJ_SUPPORT > 0

	int  vjEnabled;						/* Flag indicating VJ compression enabled. */

	struct vjcompress vjComp;			/* Van Jabobsen compression header. */

#endif

	int traceOffset;					/* Trace level offset. */

} PPPControl;





/*

 * Ioctl definitions.

 */



struct npioctl {

    int		protocol;			/* PPP procotol, e.g. PPP_IP */

    enum NPmode	mode;

};







/***********************************/

/*** LOCAL FUNCTION DECLARATIONS ***/

/***********************************/

//static void pppMain(void);

static void pppDispatch(int pd, NBuf *nb, u_int protocol);

static void pppDrop(PPPControl *pc);

static void pppInProc(int pd, u_char *s, int l);

static NBuf *pppMPutC(u_char c, ext_accm *outACCM, NBuf *nb);

static NBuf *pppMPutRaw(u_char c, NBuf *nb);



#define ESCAPE_P(accm, c) ((accm)[(c) >> 3] & pppACCMMask[c & 0x07])



/* For development use only. */



/******************************/

/*** PUBLIC DATA STRUCTURES ***/

/******************************/

int	auth_required = 0;			/* Peer is required to authenticate */

PPPControl pppControl[NUM_PPP];	/* The PPP interface control blocks. */

#if STATS_SUPPORT > 0

PPPStats pppStats;				/* Statistics. */

#endif



/*

 * PPP Data Link Layer "protocol" table.

 * One entry per supported protocol.

 * The last entry must be NULL.

 */

struct protent *protocols[] = {

	&lcp_protent,

#if PAP_SUPPORT > 0

	&pap_protent,

#endif

#if CHAP_SUPPORT > 0

	&chap_protent,

#endif

#if CBCP_SUPPORT > 0

	&cbcp_protent,

#endif

	&ipcp_protent,

#if CCP_SUPPORT	> 0

	&ccp_protent,

#endif

    NULL

};



/*

 * Buffers for outgoing packets.  This must be accessed only from the appropriate

 * PPP task so that it doesn't need to be protected to avoid collisions.

 */

u_char outpacket_buf[NUM_PPP][PPP_MRU+PPP_HDRLEN];

int user_cancel = 0;
int mail_finish = 0;

//int ret_len;

//int ppp_close = 0;







/*****************************/

/*** LOCAL DATA STRUCTURES ***/

/*****************************/



/*

 * FCS lookup table as calculated by genfcstab.

 */

const u_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

};



/* PPP's Asynchronous-Control-Character-Map.  The mask array is used

 * to select the specific bit for a character. */

static u_char pppACCMMask[] = {

	0x01,

	0x02,

	0x04,

	0x08,

	0x10,

	0x20,

	0x40,

	0x80

};







#if LXNDEBUG > 0



#define OUTBUFSIZE 2048

#define INBUFSIZE	4096



int number;



char out_buf[OUTBUFSIZE];

char* outhead;



char in_buf[INBUFSIZE];