packet-gre.h

/* packet-gre.h
 * Routines and data exported by the dissection code for the
 * Generic Routing Encapsulation (GRE) protocol
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <[email protected]>
 * Copyright 1998 Gerald Combs
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */
 
/* bit positions for flags in header */
#define GRE_CHECKSUM            0x8000
#define GRE_ROUTING             0x4000
#define GRE_KEY                 0x2000
#define GRE_SEQUENCE            0x1000
#define GRE_STRICTSOURCE        0x0800
#define GRE_RECURSION           0x0700
#define GRE_ACK                 0x0080  /* only in special PPTPized GRE header */
#define GRE_RESERVED_PPP        0x0078  /* only in special PPTPized GRE header */
#define GRE_RESERVED            0x00F8
#define GRE_VERSION             0x0007
 
/* GRE type values that aren't also Ethernet type values */
#define GRE_KEEPALIVE       0x0000
#define GRE_CISCO_CDP       0x2000
#define GRE_NHRP        0x2001
#define GRE_WCCP        0x883E
#define GRE_ERSPAN_88BE     0x88BE
#define GRE_ERSPAN_22EB     0x22EB
#define GRE_MIKROTIK_EOIP   0x6400
#define GRE_AIROHIVE        0xFEAE
#define GRE_GREBONDING      0xB7EA
/* ************************************************************************* */
/*              Aruba GRE Encapsulation ID                                   */
/* ************************************************************************* */
#define GRE_ARUBA_8200      0x8200
#define GRE_ARUBA_8210      0x8210
#define GRE_ARUBA_8220      0x8220
#define GRE_ARUBA_8230      0x8230
#define GRE_ARUBA_8240      0x8240
#define GRE_ARUBA_8250      0x8250
#define GRE_ARUBA_8260      0x8260
#define GRE_ARUBA_8270      0x8270
#define GRE_ARUBA_8280      0x8280
#define GRE_ARUBA_8290      0x8290
#define GRE_ARUBA_82A0      0x82A0
#define GRE_ARUBA_82B0      0x82B0
#define GRE_ARUBA_82C0      0x82C0
#define GRE_ARUBA_82D0      0x82D0
#define GRE_ARUBA_82E0      0x82E0
#define GRE_ARUBA_82F0      0x82F0
#define GRE_ARUBA_8300      0x8300
#define GRE_ARUBA_8310      0x8310
#define GRE_ARUBA_8320      0x8320
#define GRE_ARUBA_8330      0x8330
#define GRE_ARUBA_8340      0x8340
#define GRE_ARUBA_8350      0x8350
#define GRE_ARUBA_8360      0x8360
#define GRE_ARUBA_8370      0x8370
#define GRE_ARUBA_9000      0x9000
 
extern const value_string gre_typevals[];
 
typedef struct gre_hdr_info {
    uint16_t        flags_and_ver;
    uint32_t        key;
} gre_hdr_info_t;