1 files changed, 258 insertions, 0 deletions
diff --git a/os/ip/ppp.h b/os/ip/ppp.h
new file mode 100644
index 00000000..4f1e00de
--- /dev/null
+++ b/os/ip/ppp.h
@@ -0,0 +1,258 @@
+typedef struct PPP	PPP;
+typedef struct Pstate	Pstate;
+typedef struct Lcpmsg	Lcpmsg;
+typedef struct Lcpopt	Lcpopt;
+typedef struct Qualpkt	Qualpkt;
+typedef struct Qualstats Qualstats;
+typedef struct Tcpc	Tcpc;
+
+typedef uchar Ipaddr[IPaddrlen];
+
+enum
+{
+	HDLC_frame=	0x7e,
+	HDLC_esc=	0x7d,
+
+	/* PPP frame fields */
+	PPP_addr=	0xff,
+	PPP_ctl=	0x3,
+	PPP_initfcs=	0xffff,
+	PPP_goodfcs=	0xf0b8,
+
+	/* PPP phases */
+	Pdead=		0,	
+	Plink,				/* doing LCP */
+	Pauth,				/* doing chap */
+	Pnet,				/* doing IPCP, CCP */
+	Pterm,				/* closing down */
+
+	/* PPP protocol types */
+	Pip=		0x21,		/* internet */
+	Pvjctcp=	0x2d,		/* compressing van jacobson tcp */
+	Pvjutcp=	0x2f,		/* uncompressing van jacobson tcp */
+	Pcdata=		0xfd,		/* compressed datagram */
+	Pipcp=		0x8021,		/* ip control */
+	Pecp=		0x8053,		/* encryption control */
+	Pccp=		0x80fd,		/* compressed datagram control */
+	Plcp=		0xc021,		/* link control */
+	Ppap=		0xc023,		/* password auth. protocol */
+	Plqm=		0xc025,		/* link quality monitoring */
+	Pchap=		0xc223,		/* challenge/response */
+
+	/* LCP codes */
+	Lconfreq=	1,
+	Lconfack=	2,
+	Lconfnak=	3,
+	Lconfrej=	4,
+	Ltermreq=	5,
+	Ltermack=	6,
+	Lcoderej=	7,
+	Lprotorej=	8,
+	Lechoreq=	9,
+	Lechoack=	10,
+	Ldiscard=	11,
+
+	/* Lcp configure options */
+	Omtu=		1,
+	Octlmap=	2,
+	Oauth=		3,
+	Oquality=	4,
+	Omagic=		5,
+	Opc=		7,
+	Oac=		8,
+	Obad=		12,		/* for testing */
+
+	/* authentication protocols */
+	APmd5=		5,
+
+	/* lcp flags */
+	Fmtu=		1<<Omtu,
+	Fctlmap=	1<<Octlmap,
+	Fauth=		1<<Oauth,
+	Fquality=	1<<Oquality,
+	Fmagic=		1<<Omagic,
+	Fpc=		1<<Opc,
+	Fac=		1<<Oac,
+	Fbad=		1<<Obad,
+
+	/* Chap codes */
+	Cchallenge=	1,
+	Cresponse=	2,
+	Csuccess=	3,
+	Cfailure=	4,
+
+	/* Pap codes */
+	Cpapreq=		1,
+	Cpapack=		2,
+	Cpapnak=		3,
+
+	/* link states */
+	Sclosed=		0,
+	Sclosing,
+	Sreqsent,
+	Sackrcvd,
+	Sacksent,
+	Sopened,
+
+	/* ccp configure options */
+	Ocoui=		0,	/* proprietary compression */
+	Ocstac=		17,	/* stac electronics LZS */
+	Ocmppc=		18,	/* microsoft ppc */
+
+	/* ccp flags */
+	Fcoui=		1<<Ocoui,
+	Fcstac=		1<<Ocstac,
+	Fcmppc=		1<<Ocmppc,
+
+	/* ecp configure options */
+	Oeoui=		0,	/* proprietary compression */
+	Oedese=		1,	/* DES */
+
+	/* ecp flags */
+	Feoui=		1<<Oeoui,
+	Fedese=		1<<Oedese,
+
+	/* ipcp configure options */
+	Oipaddrs=	1,
+	Oipcompress=	2,
+	Oipaddr=	3,
+	Oipdns=		129,
+	Oipwins=	130,
+	Oipdns2=	131,
+	Oipwins2=	132,
+
+	/* ipcp flags */
+	Fipaddrs=	1<<Oipaddrs,
+	Fipcompress=	1<<Oipcompress,
+	Fipaddr=	1<<Oipaddr,
+
+	Period=		3*1000,	/* period of retransmit process (in ms) */
+	Timeout=	10,	/* xmit timeout (in Periods) */
+
+	MAX_STATES	= 16,		/* van jacobson compression states */
+	Defmtu=		1450,		/* default that we will ask for */
+	Minmtu=		128,		/* minimum that we will accept */
+	Maxmtu=		2000,		/* maximum that we will accept */
+};
+
+
+struct Pstate
+{
+	int	proto;		/* protocol type */
+	int	timeout;		/* for current state */
+	int	rxtimeout;	/* for current retransmit */
+	ulong	flags;		/* options received */
+	uchar	id;		/* id of current message */
+	uchar	confid;		/* id of current config message */
+	uchar	termid;		/* id of current termination message */
+	uchar	rcvdconfid;	/* id of last conf message received */
+	uchar	state;		/* PPP link state */
+	ulong	optmask;		/* which options to request */
+	int	echoack;	/* recieved echo ack */
+	int	echotimeout;	/* echo timeout */
+};
+
+struct Qualstats
+{
+	ulong	reports;
+	ulong	packets;
+	ulong	bytes;
+	ulong	discards;
+	ulong	errors;
+};
+
+struct PPP
+{
+	QLock;
+
+	Chan*	dchan;			/* serial line */
+	Chan*	cchan;			/* serial line control */
+	int		framing;	/* non-zero to use framing characters */
+	Ipaddr	local;
+	int		localfrozen;
+	Ipaddr	remote;
+	int		remotefrozen;
+
+	int	pppup;
+	Fs	*f;		/* file system we belong to */
+	Ipifc*	ifc;
+	Proc*	readp;			/* reading process */
+	Proc*	timep;			/* timer process */
+	Block*	inbuf;			/* input buffer */
+	Block*	outbuf;			/* output buffer */
+	QLock	outlock;		/*  and its lock */
+
+	ulong	magic;			/* magic number to detect loop backs */
+	ulong	rctlmap;		/* map of chars to ignore in rcvr */
+	ulong	xctlmap;		/* map of chars to excape in xmit */
+	int		phase;		/* PPP phase */
+	Pstate*	lcp;			/* lcp state */
+	Pstate*	ipcp;			/* ipcp state */
+	char	secret[256];		/* md5 key */
+	char	chapname[256];		/* chap system name */
+	Tcpc*	ctcp;
+	ulong		mtu;		/* maximum xmit size */
+	ulong		mru;		/* maximum recv size */
+
+	int	baud;
+	int	usepap;	/* authentication is PAP in every sense, not CHAP */
+	int	papid;
+	int	usechap;
+
+	/* rfc */
+	int	usedns;
+	Ipaddr	dns1;
+	Ipaddr	dns2;
+
+	/* link quality monitoring */
+	int		period;		/* lqm period */
+	int		timeout;	/* time to next lqm packet */
+	Qualstats	in;		/* local */
+	Qualstats	out;
+	Qualstats	pin;		/* peer */
+	Qualstats	pout;
+	Qualstats	sin;		/* saved */
+};
+
+PPP*		pppopen(PPP*, char*, Ipaddr, Ipaddr, int, int, char*, char*);
+Block*	pppread(PPP*);
+int		pppwrite(PPP*, Block*);
+void		pppclose(PPP*);
+
+struct Lcpmsg
+{
+	uchar	code;
+	uchar	id;
+	uchar	len[2];
+	uchar	data[1];
+};
+
+struct Lcpopt
+{
+	uchar	type;
+	uchar	len;
+	uchar	data[1];
+};
+
+struct Qualpkt
+{
+	uchar	magic[4];
+
+	uchar	lastoutreports[4];
+	uchar	lastoutpackets[4];
+	uchar	lastoutbytes[4];
+	uchar	peerinreports[4];
+	uchar	peerinpackets[4];
+	uchar	peerindiscards[4];
+	uchar	peerinerrors[4];
+	uchar	peerinbytes[4];
+	uchar	peeroutreports[4];
+	uchar	peeroutpackets[4];
+	uchar	peeroutbytes[4];
+};
+
+ushort	compress(Tcpc*, Block*, Fs*);
+Tcpc*	compress_init(Tcpc*);
+int		compress_negotiate(Tcpc*, uchar*);
+ushort	tcpcompress(Tcpc*, Block*, Fs*);
+Block*	tcpuncompress(Tcpc*, Block*, ushort, Fs*);