forked from osmocom/wireshark
18ecb7c367
of option code, one octet of length (which includes the two option code and length bytes), followed by 0 or more octets of option data, with some options being fixed-length and some being variable-length. Put some stuff from the PPP control protocol option parsing code into the IP-and-TCP option parsing code, and use the latter instead of the former. (That code might also be usable for CDP as well, with some stuff added to it.) Shuffle the arguments to "dissect_ip_tcp_options()" to resemble those of various other dissectors (i.e., with the "proto_tree *" at the end). Add in code to dissect a pile of PPP options documented in various RFCs. svn path=/trunk/; revision=601
86 lines
3.2 KiB
C
86 lines
3.2 KiB
C
/* packet-ip.h
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* Definitions for IP packet disassembly structures and routines
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*
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* $Id: packet-ip.h,v 1.5 1999/08/28 08:31:27 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __PACKET_IP_H__
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#define __PACKET_IP_H__
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#define IP_PROTO_ICMP 1
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#define IP_PROTO_IGMP 2
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#define IP_PROTO_TCP 6
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#define IP_PROTO_UDP 17
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#define IP_PROTO_OSPF 89
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#define IP_PROTO_IP 0 /* dummy for IP */
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#define IP_PROTO_HOPOPTS 0 /* IP6 hop-by-hop options */
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#define IP_PROTO_ICMP 1 /* control message protocol */
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#define IP_PROTO_IGMP 2 /* group mgmt protocol */
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#define IP_PROTO_GGP 3 /* gateway^2 (deprecated) */
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#define IP_PROTO_IPIP 4 /* IP inside IP */
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#define IP_PROTO_IPV4 4 /* IP header */
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#define IP_PROTO_TCP 6 /* tcp */
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#define IP_PROTO_EGP 8 /* exterior gateway protocol */
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#define IP_PROTO_PUP 12 /* pup */
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#define IP_PROTO_UDP 17 /* user datagram protocol */
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#define IP_PROTO_IDP 22 /* xns idp */
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#define IP_PROTO_TP 29 /* tp-4 w/ class negotiation */
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#define IP_PROTO_IPV6 41 /* IP6 header */
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#define IP_PROTO_ROUTING 43 /* IP6 routing header */
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#define IP_PROTO_FRAGMENT 44 /* IP6 fragmentation header */
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#define IP_PROTO_RSVP 46 /* Resource ReSerVation protocol */
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#define IP_PROTO_GRE 47 /* GRE */
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#define IP_PROTO_ESP 50 /* ESP */
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#define IP_PROTO_AH 51 /* AH */
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#define IP_PROTO_ICMPV6 58 /* ICMP6 */
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#define IP_PROTO_NONE 59 /* IP6 no next header */
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#define IP_PROTO_DSTOPTS 60 /* IP6 no next header */
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#define IP_PROTO_EON 80 /* ISO cnlp */
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#define IP_PROTO_OSPF 89
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#define IP_PROTO_ENCAP 98 /* encapsulation header */
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#define IP_PROTO_PIM 103 /* Protocol Independent Mcast */
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typedef enum {
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NO_LENGTH, /* option has no data, hence no length */
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FIXED_LENGTH, /* option always has the same length */
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VARIABLE_LENGTH /* option is variable-length - optlen is minimum */
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} opt_len_type;
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/* Member of table of IP or TCP options. */
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typedef struct ip_tcp_opt {
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int optcode; /* code for option */
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char *name; /* name of option */
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int subtree_index; /* ETT_ value for option */
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opt_len_type len_type; /* type of option length field */
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int optlen; /* value length should be (minimum if VARIABLE) */
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void (*dissect)(const struct ip_tcp_opt *, const u_char *, int, guint, proto_tree *);
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/* routine to dissect option */
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} ip_tcp_opt;
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/* Routine to dissect IP or TCP options. */
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void dissect_ip_tcp_options(const u_char *, int, guint,
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const ip_tcp_opt *, int, int, proto_tree *);
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#endif
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