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      1 /*
      2  * Point to Point Protocol (PPP) RFC1331
      3  *
      4  * Copyright 1989 by Carnegie Mellon.
      5  *
      6  * Permission to use, copy, modify, and distribute this program for any
      7  * purpose and without fee is hereby granted, provided that this copyright
      8  * and permission notice appear on all copies and supporting documentation,
      9  * the name of Carnegie Mellon not be used in advertising or publicity
     10  * pertaining to distribution of the program without specific prior
     11  * permission, and notice be given in supporting documentation that copying
     12  * and distribution is by permission of Carnegie Mellon and Stanford
     13  * University.  Carnegie Mellon makes no representations about the
     14  * suitability of this software for any purpose.  It is provided "as is"
     15  * without express or implied warranty.
     16  */
     17 #define PPP_ADDRESS	0xff	/* The address byte value */
     18 #define PPP_CONTROL	0x03	/* The control byte value */
     19 
     20 #define PPP_PPPD_IN	0x00	/* non-standard for DLT_PPP_PPPD */
     21 #define PPP_PPPD_OUT	0x01	/* non-standard for DLT_PPP_PPPD */
     22 
     23 /* Protocol numbers */
     24 #define PPP_IP		0x0021	/* Raw IP */
     25 #define PPP_OSI		0x0023	/* OSI Network Layer */
     26 #define PPP_NS		0x0025	/* Xerox NS IDP */
     27 #define PPP_DECNET	0x0027	/* DECnet Phase IV */
     28 #define PPP_APPLE	0x0029	/* Appletalk */
     29 #define PPP_IPX		0x002b	/* Novell IPX */
     30 #define PPP_VJC		0x002d	/* Van Jacobson Compressed TCP/IP */
     31 #define PPP_VJNC	0x002f	/* Van Jacobson Uncompressed TCP/IP */
     32 #define PPP_BRPDU	0x0031	/* Bridging PDU */
     33 #define PPP_STII	0x0033	/* Stream Protocol (ST-II) */
     34 #define PPP_VINES	0x0035	/* Banyan Vines */
     35 #define PPP_IPV6	0x0057	/* Internet Protocol version 6 */
     36 
     37 #define PPP_HELLO	0x0201	/* 802.1d Hello Packets */
     38 #define PPP_LUXCOM	0x0231	/* Luxcom */
     39 #define PPP_SNS		0x0233	/* Sigma Network Systems */
     40 #define PPP_MPLS_UCAST  0x0281  /* rfc 3032 */
     41 #define PPP_MPLS_MCAST  0x0283  /* rfc 3022 */
     42 
     43 #define PPP_IPCP	0x8021	/* IP Control Protocol */
     44 #define PPP_OSICP	0x8023	/* OSI Network Layer Control Protocol */
     45 #define PPP_NSCP	0x8025	/* Xerox NS IDP Control Protocol */
     46 #define PPP_DECNETCP	0x8027	/* DECnet Control Protocol */
     47 #define PPP_APPLECP	0x8029	/* Appletalk Control Protocol */
     48 #define PPP_IPXCP	0x802b	/* Novell IPX Control Protocol */
     49 #define PPP_STIICP	0x8033	/* Strean Protocol Control Protocol */
     50 #define PPP_VINESCP	0x8035	/* Banyan Vines Control Protocol */
     51 #define PPP_IPV6CP	0x8057	/* IPv6 Control Protocol */
     52 #define PPP_MPLSCP      0x8281  /* rfc 3022 */
     53 
     54 #define PPP_LCP		0xc021	/* Link Control Protocol */
     55 #define PPP_PAP		0xc023	/* Password Authentication Protocol */
     56 #define PPP_LQM		0xc025	/* Link Quality Monitoring */
     57 #define PPP_CHAP	0xc223	/* Challenge Handshake Authentication Protocol */
     58