+/* $Id: ppp_defs.h,v 1.1 1996/10/08 04:38:04 paulus Exp $ */
+
+/*
+ * ppp_defs.h - PPP definitions.
+ *
+ * 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.
+ */
+
+#ifndef _PPP_DEFS_H_
+#define _PPP_DEFS_H_
+
+/*
+ * The basic PPP frame.
+ */
+#define PPP_HDRLEN 4 /* octets for standard ppp header */
+#define PPP_FCSLEN 2 /* octets for FCS */
+#define PPP_MRU 1500 /* default MRU = max length of info field */
+
+#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])
+
+/*
+ * 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_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_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])
+
+/*
+ * Extended asyncmap - allows any character to be escaped.
+ */
+typedef u_int32_t ext_accm[8];
+
+/*
+ * What to do with network protocol (NP) packets.
+ */
+enum NPmode {
+ NPMODE_PASS, /* pass the packet through */
+ NPMODE_DROP, /* silently drop the packet */
+ NPMODE_ERROR, /* return an error */
+ NPMODE_QUEUE /* save it up for later. */
+};
+
+/*
+ * Statistics.
+ */
+struct pppstat {
+ unsigned int ppp_ibytes; /* bytes received */
+ unsigned int ppp_ipackets; /* packets received */
+ unsigned int ppp_ierrors; /* receive errors */
+ unsigned int ppp_obytes; /* bytes sent */
+ unsigned int ppp_opackets; /* packets sent */
+ unsigned int ppp_oerrors; /* transmit errors */
+};
+
+struct vjstat {
+ unsigned int vjs_packets; /* outbound packets */
+ unsigned int vjs_compressed; /* outbound compressed packets */
+ unsigned int vjs_searches; /* searches for connection state */
+ unsigned int vjs_misses; /* times couldn't find conn. state */
+ unsigned int vjs_uncompressedin; /* inbound uncompressed packets */
+ unsigned int vjs_compressedin; /* inbound compressed packets */
+ unsigned int vjs_errorin; /* inbound unknown type packets */
+ unsigned int vjs_tossed; /* inbound packets tossed because of error */
+};
+
+struct ppp_stats {
+ struct pppstat p; /* basic PPP statistics */
+ struct vjstat vj; /* VJ header compression statistics */
+};
+
+struct compstat {
+ unsigned int unc_bytes; /* total uncompressed bytes */
+ unsigned int unc_packets; /* total uncompressed packets */
+ unsigned int comp_bytes; /* compressed bytes */
+ unsigned int comp_packets; /* compressed packets */
+ unsigned int inc_bytes; /* incompressible bytes */
+ unsigned int inc_packets; /* incompressible packets */
+ unsigned int ratio; /* recent compression ratio << 8 */
+};
+
+struct ppp_comp_stats {
+ struct compstat c; /* packet compression statistics */
+ struct compstat d; /* packet decompression statistics */
+};
+
+/*
+ * The following structure records the time in seconds since
+ * the last NP packet was sent or received.
+ */
+struct ppp_idle {
+ time_t xmit_idle; /* time since last NP packet sent */
+ time_t recv_idle; /* time since last NP packet received */
+};
+
+#ifndef __P
+#ifdef __STDC__
+#define __P(x) x
+#else
+#define __P(x) ()
+#endif
+#endif
+
+#endif /* _PPP_DEFS_H_ */
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