forked from osmocom/wireshark
302 lines
8.8 KiB
C
302 lines
8.8 KiB
C
/* packet-mip.c
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* Routines for Mobile IP dissection
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* Copyright 2000, Stefan Raab <Stefan.Raab@nextel.com>
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*
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* $Id: packet-mip.c,v 1.9 2000/11/19 08:54:00 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@unicom.net>
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* Copyright 1998 Gerald Combs
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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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <string.h>
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#include <glib.h>
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#ifdef NEED_SNPRINTF_H
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# include "snprintf.h"
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#endif
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#include "packet.h"
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/* Initialize the protocol and registered fields */
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static int proto_mip = -1;
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static int hf_mip_type = -1;
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static int hf_mip_s = -1;
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static int hf_mip_b = -1;
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static int hf_mip_d = -1;
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static int hf_mip_m = -1;
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static int hf_mip_g = -1;
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static int hf_mip_v = -1;
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static int hf_mip_code = -1;
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static int hf_mip_life = -1;
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static int hf_mip_homeaddr = -1;
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static int hf_mip_haaddr = -1;
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static int hf_mip_coa = -1;
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static int hf_mip_ident = -1;
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/* Initialize the subtree pointers */
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static gint ett_mip = -1;
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/* Port used for Mobile IP */
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#define UDP_PORT_MIP 434
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/*
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struct mip_packet{
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unsigned char type;
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};
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struct mip_request_packet{
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unsigned char type;
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unsigned char code;
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unsigned char life[2];
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unsigned char homeaddr[4];
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unsigned char haaddr[4];
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unsigned char coa[4];
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unsigned char ident[8];
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};
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struct mip_reply_packet{
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unsigned char type;
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unsigned char code;
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unsigned char life[2];
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unsigned char homeaddr[4];
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unsigned char haaddr[4];
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unsigned char ident[8];
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};
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*/
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static const value_string mip_types[] = {
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{1, "Registration Request"},
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{3, "Registration Reply"}
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};
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static const value_string mip_reply_codes[]= {
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{0, "Registration Accepted"},
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{1, "Registration Accepted, no simul bindings"},
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{64, "Registration Denied by FA, unspecified reason"},
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{65, "Registration Denied by FA, Admin Prohibit"},
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{66, "Registration Denied by FA, Insufficient Resources"},
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{67, "Registration Denied by FA, MN failed Auth"},
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{68, "Registration Denied by FA, HA failed Auth"},
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{69, "Registration Denied by FA, Lifetime to long"},
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{70, "Registration Denied by FA, Poorly Formed Request"},
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{71, "Registration Denied by FA, Poorly Formed Reply"},
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{72, "Registration Denied by FA, encap unavailable"},
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{73, "Registration Denied by FA, VJ unavailable"},
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{80, "Registration Denied by FA, Home net unreachable"},
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{81, "Registration Denied by FA, Home Agent host unreachable"},
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{82, "Registration Denied by FA, Home Agent port unreachable"},
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{88, "Registration Denied by FA, Home Agent unreachable"},
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{128, "Registration Denied by HA, unspecified"},
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{129, "Registration Denied by HA, Admin Prohibit"},
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{130, "Registration Denied by HA, insufficient resources"},
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{131, "Registration Denied by HA, MN failed Auth"},
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{132, "Registration Denied by HA, FA failed Auth"},
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{133, "Registration Denied by HA, registration ID Mismatch"},
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{134, "Registration Denied by HA, poorly formed request"},
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{135, "Registration Denied by HA, too many simul bindings"},
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{136, "Registration Denied by HA, unknown HA address"},
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};
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/* Code to actually dissect the packets */
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static void
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dissect_mip(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
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{
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/* Set up structures we will need to add the protocol subtree and manage it */
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proto_item *ti;
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proto_tree *mip_tree;
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guint8 type, code;
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/* Make our own tvb until the function call includes one */
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tvbuff_t *tvb;
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packet_info *pinfo = π
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tvb = tvb_create_from_top(offset);
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CHECK_DISPLAY_AS_DATA(proto_mip, tvb, pinfo, tree);
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/* Make entries in Protocol column and Info column on summary display */
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pinfo->current_proto = "Mobile IP";
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if (check_col(fd, COL_PROTOCOL))
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col_set_str(fd, COL_PROTOCOL, "mip");
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type = tvb_get_guint8(tvb, 0);
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if (type==1) {
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if (check_col(fd, COL_INFO))
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col_set_str(fd, COL_INFO, "Mobile IP Registration Request");
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if (tree) {
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ti = proto_tree_add_item(tree, proto_mip, tvb, 0, tvb_length(tvb), FALSE);
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mip_tree = proto_item_add_subtree(ti, ett_mip);
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proto_tree_add_int(mip_tree, hf_mip_type, tvb, 0, 1, type);
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code = tvb_get_guint8(tvb, 1);
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proto_tree_add_boolean(mip_tree, hf_mip_s, tvb, 1, 1, code);
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proto_tree_add_boolean(mip_tree, hf_mip_b, tvb, 1, 1, code);
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proto_tree_add_boolean(mip_tree, hf_mip_d, tvb, 1, 1, code);
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proto_tree_add_boolean(mip_tree, hf_mip_m, tvb, 1, 1, code);
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proto_tree_add_boolean(mip_tree, hf_mip_g, tvb, 1, 1, code);
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proto_tree_add_boolean(mip_tree, hf_mip_v, tvb, 1, 1, code);
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proto_tree_add_int(mip_tree, hf_mip_life, tvb, 2, 2, tvb_get_ntohs(tvb, 2));
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proto_tree_add_ipv4(mip_tree, hf_mip_homeaddr, tvb, 4, 4, tvb_get_letohl(tvb, 4));
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proto_tree_add_ipv4(mip_tree, hf_mip_haaddr, tvb, 8, 4, tvb_get_letohl(tvb, 8));
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proto_tree_add_ipv4(mip_tree, hf_mip_coa, tvb, 12, 4, tvb_get_letohl(tvb, 12));
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proto_tree_add_bytes(mip_tree, hf_mip_ident, tvb, 16, 8, tvb_get_ptr(tvb, 16, 8));
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}
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}
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if (type==3){
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if (check_col(fd, COL_INFO))
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col_set_str(fd, COL_INFO, "Mobile IP Registration Reply");
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if (tree) {
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ti = proto_tree_add_item(tree, proto_mip, tvb, 0, tvb_length(tvb), FALSE);
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mip_tree = proto_item_add_subtree(ti, ett_mip);
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proto_tree_add_int(mip_tree, hf_mip_type, tvb, 0, 1, type);
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code = tvb_get_guint8(tvb, 1);
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proto_tree_add_uint(mip_tree, hf_mip_code, tvb, 1, 1, code);
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proto_tree_add_int(mip_tree, hf_mip_life, tvb, 2, 2, tvb_get_ntohs(tvb, 2));
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proto_tree_add_ipv4(mip_tree, hf_mip_homeaddr, tvb, 4, 4, tvb_get_letohl(tvb, 4));
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proto_tree_add_ipv4(mip_tree, hf_mip_haaddr, tvb, 8, 4, tvb_get_letohl(tvb, 8));
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proto_tree_add_bytes(mip_tree, hf_mip_ident, tvb, 12, 8, tvb_get_ptr(tvb, 12, 8));
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}
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}
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}
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/* Register the protocol with Ethereal */
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void proto_register_mip(void)
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{
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/* Setup list of header fields */
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static hf_register_info hf[] = {
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{ &hf_mip_type,
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{ "Message Type", "mip.type",
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FT_INT8, BASE_DEC, VALS(mip_types), 0,
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"Mobile IP Message type." }
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},
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{ &hf_mip_s,
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{"Simultaneous Bindings", "mip.s",
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FT_BOOLEAN, 8, NULL, 128,
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"Simultaneous Bindings Allowed" }
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},
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{ &hf_mip_b,
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{"Broadcast Datagrams", "mip.b",
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FT_BOOLEAN, 8, NULL, 64,
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"Broadcast Datagrams requested" }
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},
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{ &hf_mip_d,
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{ "Co-lcated Care-of Address", "mip.d",
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FT_BOOLEAN, 8, NULL, 32,
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"MN using Co-located Care-of address" }
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},
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{ &hf_mip_m,
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{"Minimal Encapsulation", "mip.m",
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FT_BOOLEAN, 8, NULL, 16,
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"MN wants Minimal encapsulation" }
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},
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{ &hf_mip_g,
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{"GRE", "mip.g",
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FT_BOOLEAN, 8, NULL, 8,
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"MN wants GRE encapsulation" }
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},
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{ &hf_mip_v,
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{ "Van Jacobson", "mip.v",
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FT_BOOLEAN, 8, NULL, 4,
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"Van Jacobson" }
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},
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{ &hf_mip_code,
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{ "Reply Code", "mip.code",
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FT_UINT8, BASE_DEC, VALS(mip_reply_codes), 0,
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"Mobile IP Reply code." }
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},
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{ &hf_mip_life,
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{ "Lifetime", "mip.life",
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FT_INT16, BASE_DEC, NULL, 0,
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"Mobile IP Lifetime." }
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},
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{ &hf_mip_homeaddr,
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{ "Home Address", "mip.homeaddr",
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FT_IPv4, BASE_NONE, NULL, 0,
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"Mobile Node's home address." }
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},
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{ &hf_mip_haaddr,
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{ "Home Agent", "mip.haaddr",
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FT_IPv4, BASE_NONE, NULL, 0,
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"Home agent IP Address." }
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},
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{ &hf_mip_coa,
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{ "Care of Address", "mip.coa",
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FT_IPv4, BASE_NONE, NULL, 0,
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"Care of Address." }
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},
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{ &hf_mip_ident,
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{ "Identification", "mip.ident",
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FT_BYTES, BASE_NONE, NULL, 0,
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"MN Identification." }
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},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_mip,
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};
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/* Register the protocol name and description */
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proto_mip = proto_register_protocol("Mobile IP", "mip");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array(proto_mip, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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};
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void
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proto_reg_handoff_mip(void)
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{
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old_dissector_add("udp.port", UDP_PORT_MIP, dissect_mip);
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}
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