From 669db206cb1f270046ad400fff7655e20c63e723 Mon Sep 17 00:00:00 2001 From: Gilbert Ramirez Date: Sun, 18 Jul 2004 18:06:47 +0000 Subject: Move dissectors to epan/dissectors directory. Also move ncp222.py, x11-fields, process-x11-fields.pl, make-reg-dotc, and make-reg-dotc.py. Adjust #include lines in files that include packet-*.h files. svn path=/trunk/; revision=11410 --- epan/dissectors/packet-esis.c | 452 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 452 insertions(+) create mode 100644 epan/dissectors/packet-esis.c (limited to 'epan/dissectors/packet-esis.c') diff --git a/epan/dissectors/packet-esis.c b/epan/dissectors/packet-esis.c new file mode 100644 index 0000000000..b923067719 --- /dev/null +++ b/epan/dissectors/packet-esis.c @@ -0,0 +1,452 @@ +/* packet-esis.c + * Routines for ISO/OSI End System to Intermediate System + * Routing Exchange Protocol ISO 9542. + * + * $Id$ + * Ralf Schneider + * + * Ethereal - Network traffic analyzer + * By Gerald Combs + * 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 +#include +#include +#include +#include "nlpid.h" +#include "packet-osi.h" +#include "packet-osi-options.h" +#include "packet-esis.h" + + +/* esis base header */ +static int proto_esis = -1; + +static int hf_esis_nlpi = -1; +static int hf_esis_length = -1; +static int hf_esis_version = -1; +static int hf_esis_reserved = -1; +static int hf_esis_type = -1; +static int hf_esis_holdtime = -1; +static int hf_esis_checksum = -1; + +static gint ett_esis = -1; +static gint ett_esis_area_addr = -1; + +static const value_string esis_vals[] = { + { ESIS_ESH_PDU, "ES HELLO"}, + { ESIS_ISH_PDU, "IS HELLO"}, + { ESIS_RD_PDU, "RD REQUEST"}, + { 0, NULL} }; + +/* internal prototypes */ + +static void esis_dissect_esh_pdu( guint8 len, tvbuff_t *tvb, + proto_tree *treepd); +static void esis_dissect_ish_pdu( guint8 len, tvbuff_t *tvb, + proto_tree *tree); +static void esis_dissect_redirect_pdu( guint8 len, tvbuff_t *tvb, + proto_tree *tree); + +/* ################## Descriptions ###########################################*/ +/* Parameters for the ESH PDU + * Source Address Parameter: + * + * Octet: Length: Parameter Type: + * 10 1 Number of Source Adresses ( NSAPs served by this Network + * 11 1 Source Address Length Indicator ( SAL ) # Entity ) + * 12-m-1 variable Source Address ( NSAP ) + * m Options, dissected in osi.c + * + * + * Parameter for the ISH PDU: + * Network Entity Title Parameter: + * + * Octet: Length: Parameter Type: + * 10 1 Network Entity Title Length Indicator ( NETL ) + * 11-m-1 variable Network Entity Title ( NET ) + * m Options, dissected in osi.c + * + * + * Parameter for the RD PDU: + * When re-directed to an IS: + * + * Octet: Length: Parameter Type: + * 10 1 Destination Address Length Indicator ( DAL ) + * 11>m-1 variable Destination Address ( DA ) + * m 1 Subnetwork Address Length Indicator ( BSNPAL ) + * m+1>n-1 variable Subnetwork Address ( BSNPA ) + * n 1 Network Entity Title Length Indicator ( NETL ) + * n+1>p-1 variable Network Entity Title ( NET ) + * p Options, dissected in osi.c + * + * + * Parameter for the RD PDU: + * When re-directed to an ES: + * + * Octet: Length: Parameter Type: + * 10 1 Destination Address Length Indicator ( DAL ) + * 11>m-1 variable Destination Address ( DA ) + * m 1 Subnetwork Address Length Indicator ( BSNPAL ) + * m+1>n-1 variable Subnetwork Address ( BSNPA ) + * n 1 Network Entity Title Length Indicator ( NETL ) == 0 + * n+1 Options, dissected in osi.c + * + */ + +/* ############################ Tool Functions ############################## */ + + +/* ############################## Dissection Functions ###################### */ +/* + * Name: dissect_esis_unknown() + * + * Description: + * There was some error in the protocol and we are in unknown space + * here. Add a tree item to cover the error and go on. Note + * that we make sure we don't go off the end of the bleedin packet here! + * + * This is just a copy of isis.c and isis.h, so I keep the stuff also + * and adapt the names to cover possible protocol errors! Ive really no + * idea wether I need this or not. + * + * Input + * tvbuff_t * : tvbuff with packet data. + * proto_tree * : tree of display data. May be NULL. + * char * : format text + * subsequent args : arguments to format + * + * Output: + * void (may modify proto tree) + */ +static void +esis_dissect_unknown( tvbuff_t *tvb, proto_tree *tree, char *fmat, ...){ + va_list ap; + + va_start(ap, fmat); + proto_tree_add_text_valist(tree, tvb, 0, -1, fmat, ap); + va_end(ap); +} + + +static void +esis_dissect_esh_pdu( guint8 len, tvbuff_t *tvb, proto_tree *tree) { + proto_tree *esis_area_tree; + int offset = 0; + int no_sa = 0; + int sal = 0; + + proto_item *ti; + + if (tree) { + offset += ESIS_HDR_FIXED_LENGTH; + + no_sa = tvb_get_guint8(tvb, offset); + len -= 1; + + ti = proto_tree_add_text( tree, tvb, offset, -1, + "Number of Source Addresses (SA, Format: NSAP) : %u", no_sa ); + offset++; + + esis_area_tree = proto_item_add_subtree( ti, ett_esis_area_addr ); + while ( no_sa-- > 0 ) { + sal = (int) tvb_get_guint8(tvb, offset); + offset++; + proto_tree_add_text(esis_area_tree, tvb, offset, 1, "SAL: %2u Octets", sal); + proto_tree_add_text(esis_area_tree, tvb, offset + 1, sal, + " SA: %s", + print_nsap_net( tvb_get_ptr(tvb, offset, sal), sal ) ); + offset += sal; + len -= ( sal + 1 ); + } + dissect_osi_options( len, tvb, offset, tree ); + } +} /* esis_dissect_esh_pdu */ + +static void +esis_dissect_ish_pdu( guint8 len, tvbuff_t *tvb, proto_tree *tree) { + + int offset = 0; + int netl = 0; + + if (tree) { + offset += ESIS_HDR_FIXED_LENGTH; + + netl = (int) tvb_get_guint8(tvb, offset); + proto_tree_add_text( tree, tvb, offset, netl + 1, + "### Network Entity Title Section ###"); + proto_tree_add_text( tree, tvb, offset++, 1, "NETL: %2u Octets", netl); + proto_tree_add_text( tree, tvb, offset, netl, + " NET: %s", + print_nsap_net( tvb_get_ptr(tvb, offset, netl), netl ) ); + offset += netl; + len -= ( netl + 1 ); + + dissect_osi_options( len, tvb, offset, tree ); + } +} + +static void +esis_dissect_redirect_pdu( guint8 len, tvbuff_t *tvb, proto_tree *tree) { + + int offset = 0; + int tmpl = 0; + + if (tree) { + offset += ESIS_HDR_FIXED_LENGTH; + + tmpl = (int) tvb_get_guint8(tvb, offset); + proto_tree_add_text( tree, tvb, offset, tmpl + 1, + "### Destination Address Section ###" ); + proto_tree_add_text( tree, tvb, offset++, 1, "DAL: %2u Octets", tmpl); + proto_tree_add_text( tree, tvb, offset, tmpl, + " DA : %s", + print_nsap_net( tvb_get_ptr(tvb, offset, tmpl), tmpl ) ); + offset += tmpl; + len -= ( tmpl + 1 ); + tmpl = (int) tvb_get_guint8(tvb, offset); + + proto_tree_add_text( tree, tvb, offset, tmpl + 1, + "### Subnetwork Address Section ###"); + proto_tree_add_text( tree, tvb, offset++, 1, "BSNPAL: %2u Octets", tmpl); + proto_tree_add_text( tree, tvb, offset, tmpl, + " BSNPA: %s", + print_system_id( tvb_get_ptr(tvb, offset, tmpl), tmpl ) ); + offset += tmpl; + len -= ( tmpl + 1 ); + tmpl = (int) tvb_get_guint8(tvb, offset); + + if ( 0 == tmpl ) { + proto_tree_add_text( tree, tvb, offset, 1, + "### No Network Entity Title Section ###" ); + offset++; + len--; + } + else { + proto_tree_add_text( tree, tvb, offset, 1, + "### Network Entity Title Section ###" ); + proto_tree_add_text( tree, tvb, offset++, 1, "NETL: %2u Octets", tmpl ); + proto_tree_add_text( tree, tvb, offset, tmpl, + " NET: %s", + print_nsap_net( tvb_get_ptr(tvb, offset, tmpl), tmpl ) ); + offset += tmpl; + len -= ( tmpl + 1 ); + } + dissect_osi_options( len, tvb, offset, tree ); + } +} + + +/* + * Name: dissect_esis() + * + * Description: + * Main entry area for esis de-mangling. This will build the + * main esis tree data and call the sub-protocols as needed. + * + * Input: + * tvbuff * : tvbuff referring to packet data + * packet_info * : info for current packet + * proto_tree * : tree of display data. May be NULL. + * + * Output: + * void, but we will add to the proto_tree if it is not NULL. + */ +static void +dissect_esis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { + char *pdu_type_string = NULL; + char *pdu_type_format_string = "PDU Type : %s (R:%s%s%s)"; + esis_hdr_t ehdr; + proto_item *ti; + proto_tree *esis_tree = NULL; + guint8 variable_len; + guint tmp_uint = 0; + char *cksum_status; + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "ESIS"); + if (check_col(pinfo->cinfo, COL_INFO)) + col_clear(pinfo->cinfo, COL_INFO); + + tvb_memcpy(tvb, (guint8 *)&ehdr, 0, sizeof ehdr); + + if (tree) { + ti = proto_tree_add_item(tree, proto_esis, tvb, 0, -1, FALSE); + esis_tree = proto_item_add_subtree(ti, ett_esis); + + if (ehdr.esis_version != ESIS_REQUIRED_VERSION){ + esis_dissect_unknown(tvb, esis_tree, + "Unknown ESIS version (%u vs %u)", + ehdr.esis_version, ESIS_REQUIRED_VERSION ); + return; + } + + if (ehdr.esis_length < ESIS_HDR_FIXED_LENGTH) { + esis_dissect_unknown(tvb, esis_tree, + "Bogus ESIS length (%u, must be >= %u)", + ehdr.esis_length, ESIS_HDR_FIXED_LENGTH ); + return; + } + proto_tree_add_uint( esis_tree, hf_esis_nlpi, tvb, 0, 1, ehdr.esis_nlpi ); + proto_tree_add_uint( esis_tree, hf_esis_length, tvb, + 1, 1, ehdr.esis_length ); + proto_tree_add_uint( esis_tree, hf_esis_version, tvb, 2, 1, + ehdr.esis_version ); + proto_tree_add_uint( esis_tree, hf_esis_reserved, tvb, 3, 1, + ehdr.esis_reserved ); + + pdu_type_string = val_to_str(ehdr.esis_type&OSI_PDU_TYPE_MASK, + esis_vals, "Unknown (0x%x)"); + + proto_tree_add_uint_format( esis_tree, hf_esis_type, tvb, 4, 1, + ehdr.esis_type, + pdu_type_format_string, + pdu_type_string, + (ehdr.esis_type&BIT_8) ? "1" : "0", + (ehdr.esis_type&BIT_7) ? "1" : "0", + (ehdr.esis_type&BIT_6) ? "1" : "0"); + + tmp_uint = pntohs( ehdr.esis_holdtime ); + proto_tree_add_uint_format(esis_tree, hf_esis_holdtime, tvb, 5, 2, + tmp_uint, "Holding Time : %u seconds", + tmp_uint ); + + tmp_uint = pntohs( ehdr.esis_checksum ); + + switch (calc_checksum( tvb, 0, ehdr.esis_length, tmp_uint )) { + + case NO_CKSUM: + cksum_status = "Not Used"; + break; + + case DATA_MISSING: + cksum_status = "Not checkable - not all of packet was captured"; + break; + + case CKSUM_OK: + cksum_status = "Is good"; + break; + + case CKSUM_NOT_OK: + cksum_status = "Is wrong"; + break; + + default: + cksum_status = NULL; + g_assert_not_reached(); + } + proto_tree_add_uint_format( esis_tree, hf_esis_checksum, tvb, 7, 2, + tmp_uint, "Checksum : 0x%x ( %s )", + tmp_uint, cksum_status ); + } + + + /* + * Let us make sure we use the same names for all our decodes + * here. First, dump the name into info column, and THEN + * dispatch the sub-type. + */ + if (check_col(pinfo->cinfo, COL_INFO)) { + col_add_str(pinfo->cinfo, COL_INFO, + val_to_str( ehdr.esis_type&OSI_PDU_TYPE_MASK, esis_vals, + "Unknown (0x%x)" ) ); + } + + variable_len = ehdr.esis_length - ESIS_HDR_FIXED_LENGTH; + + switch (ehdr.esis_type & OSI_PDU_TYPE_MASK) { + case ESIS_ESH_PDU: + esis_dissect_esh_pdu( variable_len, tvb, esis_tree); + break; + case ESIS_ISH_PDU: + esis_dissect_ish_pdu( variable_len, tvb, esis_tree); + break; + case ESIS_RD_PDU: + esis_dissect_redirect_pdu( variable_len, tvb, esis_tree); + break; + default: + esis_dissect_unknown(tvb, esis_tree, + "Unknown ESIS packet type 0x%x", + ehdr.esis_type & OSI_PDU_TYPE_MASK ); + } +} /* dissect_esis */ + + +/* + * Name: proto_register_esis() + * + * Description: + * main register for esis protocol set. We register some display + * formats and the protocol module variables. + * + * NOTE: this procedure to autolinked by the makefile process that + * builds register.c + * + * Input: + * void + * + * Output: + * void + */ +void +proto_register_esis(void) { + static hf_register_info hf[] = { + { &hf_esis_nlpi, + { "Network Layer Protocol Identifier", "esis.nlpi", + FT_UINT8, BASE_HEX, VALS(nlpid_vals), 0x0, "", HFILL }}, + { &hf_esis_length, + { "PDU Length ", "esis.length", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }}, + { &hf_esis_version, + { "Version (==1) ", "esis.ver", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }}, + { &hf_esis_reserved, + { "Reserved(==0) ", "esis.res", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }}, + { &hf_esis_type, + { "PDU Type ", "esis.type", FT_UINT8, BASE_DEC, VALS(esis_vals), + 0xff, "", HFILL }}, + { &hf_esis_holdtime, + { "Holding Time ", "esis.htime", FT_UINT16, BASE_DEC, NULL, 0x0, " s", HFILL }}, + { &hf_esis_checksum, + { "Checksum ", "esis.chksum", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }} + }; + /* + * + * + */ + static gint *ett[] = { + &ett_esis, + &ett_esis_area_addr, + }; + + proto_esis = proto_register_protocol( PROTO_STRING_ESIS, "ESIS", "esis"); + proto_register_field_array(proto_esis, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_esis(void) +{ + dissector_handle_t esis_handle; + + esis_handle = create_dissector_handle(dissect_esis, proto_esis); + register_dissector("esis", dissect_esis, proto_esis); + dissector_add("osinl", NLPID_ISO9542_ESIS, esis_handle); +} -- cgit v1.2.3