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wireshark/packet-mip.c
Guy Harris 32d63ecb30 Remove more "CHECK_DISPLAY_AS_DATA()" calls and "pinfo->current_proto =" 
statements.

Move the setting of the Protocol column in various dissectors before
anything is fetched from the packet, and also clear the Info column at
that point in those and some other dissectors, so that if an exception
is thrown, the columns don't reflect the previous protocol.

"Tvbuffify" the Mobile IP dissector (it took old-style arguments, and
then converted them into tvbuff arguments, so there wasn't much to do,
other than to fix references to "fd" to refer to "pinfo->fd").

In the SCTP dissector, refer to the port type and source and destination
ports through "pinfo" rather than through the global "pi", as it's a
tvbuffified dissector.

In the SMTP and Time Protocol dissectors, use "pinfo->match_port" rather
than "TCP_PORT_SMTP" when checking whether the packet is a request or
reply, just in case somebody makes a non-standard port be dissected as
SMTP or Time.  (Also, remove a bogus comment from the Time dissector; it
was probably cut-and-pasted from the TFTP dissector.)

svn path=/trunk/; revision=2938
2001-01-25 06:14:14 +00:00

298 lines
8.8 KiB
C
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/* packet-mip.c
* Routines for Mobile IP dissection
* Copyright 2000, Stefan Raab <Stefan.Raab@nextel.com>
*
* $Id: packet-mip.c,v 1.13 2001/01/25 06:14:14 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@unicom.net>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#include <string.h>
#include <glib.h>
#ifdef NEED_SNPRINTF_H
# include "snprintf.h"
#endif
#include "packet.h"
/* Initialize the protocol and registered fields */
static int proto_mip = -1;
static int hf_mip_type = -1;
static int hf_mip_s = -1;
static int hf_mip_b = -1;
static int hf_mip_d = -1;
static int hf_mip_m = -1;
static int hf_mip_g = -1;
static int hf_mip_v = -1;
static int hf_mip_code = -1;
static int hf_mip_life = -1;
static int hf_mip_homeaddr = -1;
static int hf_mip_haaddr = -1;
static int hf_mip_coa = -1;
static int hf_mip_ident = -1;
/* Initialize the subtree pointers */
static gint ett_mip = -1;
/* Port used for Mobile IP */
#define UDP_PORT_MIP 434
/*
struct mip_packet{
unsigned char type;
};
struct mip_request_packet{
unsigned char type;
unsigned char code;
unsigned char life[2];
unsigned char homeaddr[4];
unsigned char haaddr[4];
unsigned char coa[4];
unsigned char ident[8];
};
struct mip_reply_packet{
unsigned char type;
unsigned char code;
unsigned char life[2];
unsigned char homeaddr[4];
unsigned char haaddr[4];
unsigned char ident[8];
};
*/
static const value_string mip_types[] = {
{1, "Registration Request"},
{3, "Registration Reply"},
{0, NULL},
};
static const value_string mip_reply_codes[]= {
{0, "Registration Accepted"},
{1, "Registration Accepted, no simul bindings"},
{64, "Registration Denied by FA, unspecified reason"},
{65, "Registration Denied by FA, Admin Prohibit"},
{66, "Registration Denied by FA, Insufficient Resources"},
{67, "Registration Denied by FA, MN failed Auth"},
{68, "Registration Denied by FA, HA failed Auth"},
{69, "Registration Denied by FA, Lifetime to long"},
{70, "Registration Denied by FA, Poorly Formed Request"},
{71, "Registration Denied by FA, Poorly Formed Reply"},
{72, "Registration Denied by FA, encap unavailable"},
{73, "Registration Denied by FA, VJ unavailable"},
{80, "Registration Denied by FA, Home net unreachable"},
{81, "Registration Denied by FA, Home Agent host unreachable"},
{82, "Registration Denied by FA, Home Agent port unreachable"},
{88, "Registration Denied by FA, Home Agent unreachable"},
{128, "Registration Denied by HA, unspecified"},
{129, "Registration Denied by HA, Admin Prohibit"},
{130, "Registration Denied by HA, insufficient resources"},
{131, "Registration Denied by HA, MN failed Auth"},
{132, "Registration Denied by HA, FA failed Auth"},
{133, "Registration Denied by HA, registration ID Mismatch"},
{134, "Registration Denied by HA, poorly formed request"},
{135, "Registration Denied by HA, too many simul bindings"},
{136, "Registration Denied by HA, unknown HA address"},
{0, NULL},
};
/* Code to actually dissect the packets */
static void
dissect_mip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
/* Set up structures we will need to add the protocol subtree and manage it */
proto_item *ti;
proto_tree *mip_tree;
guint8 type, code;
/* Make entries in Protocol column and Info column on summary display */
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "Mobile IP");
if (check_col(pinfo->fd, COL_INFO))
col_clear(pinfo->fd, COL_INFO);
type = tvb_get_guint8(tvb, 0);
if (type==1) {
if (check_col(pinfo->fd, COL_INFO))
col_set_str(pinfo->fd, COL_INFO, "Mobile IP Registration Request");
if (tree) {
ti = proto_tree_add_item(tree, proto_mip, tvb, 0, tvb_length(tvb), FALSE);
mip_tree = proto_item_add_subtree(ti, ett_mip);
proto_tree_add_int(mip_tree, hf_mip_type, tvb, 0, 1, type);
code = tvb_get_guint8(tvb, 1);
proto_tree_add_boolean(mip_tree, hf_mip_s, tvb, 1, 1, code);
proto_tree_add_boolean(mip_tree, hf_mip_b, tvb, 1, 1, code);
proto_tree_add_boolean(mip_tree, hf_mip_d, tvb, 1, 1, code);
proto_tree_add_boolean(mip_tree, hf_mip_m, tvb, 1, 1, code);
proto_tree_add_boolean(mip_tree, hf_mip_g, tvb, 1, 1, code);
proto_tree_add_boolean(mip_tree, hf_mip_v, tvb, 1, 1, code);
proto_tree_add_int(mip_tree, hf_mip_life, tvb, 2, 2, tvb_get_ntohs(tvb, 2));
proto_tree_add_ipv4(mip_tree, hf_mip_homeaddr, tvb, 4, 4, tvb_get_letohl(tvb, 4));
proto_tree_add_ipv4(mip_tree, hf_mip_haaddr, tvb, 8, 4, tvb_get_letohl(tvb, 8));
proto_tree_add_ipv4(mip_tree, hf_mip_coa, tvb, 12, 4, tvb_get_letohl(tvb, 12));
proto_tree_add_bytes(mip_tree, hf_mip_ident, tvb, 16, 8, tvb_get_ptr(tvb, 16, 8));
}
}
if (type==3){
if (check_col(pinfo->fd, COL_INFO))
col_set_str(pinfo->fd, COL_INFO, "Mobile IP Registration Reply");
if (tree) {
ti = proto_tree_add_item(tree, proto_mip, tvb, 0, tvb_length(tvb), FALSE);
mip_tree = proto_item_add_subtree(ti, ett_mip);
proto_tree_add_int(mip_tree, hf_mip_type, tvb, 0, 1, type);
code = tvb_get_guint8(tvb, 1);
proto_tree_add_uint(mip_tree, hf_mip_code, tvb, 1, 1, code);
proto_tree_add_int(mip_tree, hf_mip_life, tvb, 2, 2, tvb_get_ntohs(tvb, 2));
proto_tree_add_ipv4(mip_tree, hf_mip_homeaddr, tvb, 4, 4, tvb_get_letohl(tvb, 4));
proto_tree_add_ipv4(mip_tree, hf_mip_haaddr, tvb, 8, 4, tvb_get_letohl(tvb, 8));
proto_tree_add_bytes(mip_tree, hf_mip_ident, tvb, 12, 8, tvb_get_ptr(tvb, 12, 8));
}
}
}
/* Register the protocol with Ethereal */
void proto_register_mip(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_mip_type,
{ "Message Type", "mip.type",
FT_INT8, BASE_DEC, VALS(mip_types), 0,
"Mobile IP Message type." }
},
{ &hf_mip_s,
{"Simultaneous Bindings", "mip.s",
FT_BOOLEAN, 8, NULL, 128,
"Simultaneous Bindings Allowed" }
},
{ &hf_mip_b,
{"Broadcast Datagrams", "mip.b",
FT_BOOLEAN, 8, NULL, 64,
"Broadcast Datagrams requested" }
},
{ &hf_mip_d,
{ "Co-lcated Care-of Address", "mip.d",
FT_BOOLEAN, 8, NULL, 32,
"MN using Co-located Care-of address" }
},
{ &hf_mip_m,
{"Minimal Encapsulation", "mip.m",
FT_BOOLEAN, 8, NULL, 16,
"MN wants Minimal encapsulation" }
},
{ &hf_mip_g,
{"GRE", "mip.g",
FT_BOOLEAN, 8, NULL, 8,
"MN wants GRE encapsulation" }
},
{ &hf_mip_v,
{ "Van Jacobson", "mip.v",
FT_BOOLEAN, 8, NULL, 4,
"Van Jacobson" }
},
{ &hf_mip_code,
{ "Reply Code", "mip.code",
FT_UINT8, BASE_DEC, VALS(mip_reply_codes), 0,
"Mobile IP Reply code." }
},
{ &hf_mip_life,
{ "Lifetime", "mip.life",
FT_INT16, BASE_DEC, NULL, 0,
"Mobile IP Lifetime." }
},
{ &hf_mip_homeaddr,
{ "Home Address", "mip.homeaddr",
FT_IPv4, BASE_NONE, NULL, 0,
"Mobile Node's home address." }
},
{ &hf_mip_haaddr,
{ "Home Agent", "mip.haaddr",
FT_IPv4, BASE_NONE, NULL, 0,
"Home agent IP Address." }
},
{ &hf_mip_coa,
{ "Care of Address", "mip.coa",
FT_IPv4, BASE_NONE, NULL, 0,
"Care of Address." }
},
{ &hf_mip_ident,
{ "Identification", "mip.ident",
FT_BYTES, BASE_NONE, NULL, 0,
"MN Identification." }
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_mip,
};
/* Register the protocol name and description */
proto_mip = proto_register_protocol("Mobile IP", "Mobile IP", "mip");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_mip, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
};
void
proto_reg_handoff_mip(void)
{
dissector_add("udp.port", UDP_PORT_MIP, dissect_mip, proto_mip);
}
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