Initial revision

1 files changed, 127 insertions, 0 deletions

diff --git a/usr.sbin/pppd/fsm.h b/usr.sbin/pppd/fsm.h
new file mode 100644
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+++ b/usr.sbin/pppd/fsm.h
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+/*
+ * fsm.h - {Link, IP} Control Protocol Finite State Machine 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Id: fsm.h,v 1.2 1994/04/11 07:18:35 paulus Exp $
+ */
+
+/*
+ * Packet header = Code, id, length.
+ */
+#define HEADERLEN	(sizeof (u_char) + sizeof (u_char) + sizeof (u_short))
+
+
+/*
+ *  CP (LCP, IPCP, etc.) codes.
+ */
+#define CONFREQ		1	/* Configuration Request */
+#define CONFACK		2	/* Configuration Ack */
+#define CONFNAK		3	/* Configuration Nak */
+#define CONFREJ		4	/* Configuration Reject */
+#define TERMREQ		5	/* Termination Request */
+#define TERMACK		6	/* Termination Ack */
+#define CODEREJ		7	/* Code Reject */
+
+
+/*
+ * Each FSM is described by a fsm_callbacks and a fsm structure.
+ */
+typedef struct fsm_callbacks {
+    void (*resetci)();		/* Reset our Configuration Information */
+    int  (*cilen)();		/* Length of our Configuration Information */
+    void (*addci)();		/* Add our Configuration Information */
+    int  (*ackci)();		/* ACK our Configuration Information */
+    int  (*nakci)();		/* NAK our Configuration Information */
+    int  (*rejci)();		/* Reject our Configuration Information */
+    int  (*reqci)();		/* Request peer's Configuration Information */
+    void (*up)();		/* Called when fsm reaches OPENED state */
+    void (*down)();		/* Called when fsm leaves OPENED state */
+    void (*starting)();		/* Called when we want the lower layer */
+    void (*finished)();		/* Called when we don't want the lower layer */
+    void (*protreject)();	/* Called when Protocol-Reject received */
+    void (*retransmit)();	/* Retransmission is necessary */
+    int  (*extcode)();		/* Called when unknown code received */
+    char *proto_name;		/* String name for protocol (for messages) */
+} fsm_callbacks;
+
+
+typedef struct fsm {
+    int unit;			/* Interface unit number */
+    int protocol;		/* Data Link Layer Protocol field value */
+    int state;			/* State */
+    int flags;			/* Contains option bits */
+    u_char id;			/* Current id */
+    u_char reqid;		/* Current request id */
+    int timeouttime;		/* Timeout time in milliseconds */
+    int maxconfreqtransmits;	/* Maximum Configure-Request transmissions */
+    int retransmits;		/* Number of retransmissions left */
+    int maxtermtransmits;	/* Maximum Terminate-Request transmissions */
+    int nakloops;		/* Number of nak loops since last ack */
+    int maxnakloops;		/* Maximum number of nak loops tolerated */
+    fsm_callbacks *callbacks;	/* Callback routines */
+} fsm;
+
+
+/*
+ * Link states.
+ */
+#define INITIAL		0	/* Down, hasn't been opened */
+#define STARTING	1	/* Down, been opened */
+#define CLOSED		2	/* Up, hasn't been opened */
+#define STOPPED		3	/* Open, waiting for down event */
+#define CLOSING		4	/* Terminating the connection, not open */
+#define STOPPING	5	/* Terminating, but open */
+#define REQSENT		6	/* We've sent a Config Request */
+#define ACKRCVD		7	/* We've received a Config Ack */
+#define ACKSENT		8	/* We've sent a Config Ack */
+#define OPENED		9	/* Connection available */
+
+
+/*
+ * Flags - indicate options controlling FSM operation
+ */
+#define OPT_PASSIVE	1	/* Don't die if we don't get a response */
+#define OPT_RESTART	2	/* Treat 2nd OPEN as DOWN, UP */
+#define OPT_SILENT	4	/* Wait for peer to speak first */
+
+
+/*
+ * Timeouts.
+ */
+#define DEFTIMEOUT	3	/* Timeout time in seconds */
+#define DEFMAXTERMREQS	2	/* Maximum Terminate-Request transmissions */
+#define DEFMAXCONFREQS	10	/* Maximum Configure-Request transmissions */
+#define DEFMAXNAKLOOPS	10	/* Maximum number of nak loops */
+
+
+/*
+ * Prototypes
+ */
+void fsm_init __ARGS((fsm *));
+void fsm_lowerup __ARGS((fsm *));
+void fsm_lowerdown __ARGS((fsm *));
+void fsm_open __ARGS((fsm *));
+void fsm_close __ARGS((fsm *));
+void fsm_input __ARGS((fsm *, u_char *, int));
+void fsm_protreject __ARGS((fsm *));
+void fsm_sdata __ARGS((fsm *, int, int, u_char *, int));
+
+
+/*
+ * Variables
+ */
+extern int peer_mru[];		/* currently negotiated peer MRU (per unit) */