forked from osmocom/wireshark
543 lines
22 KiB
C
543 lines
22 KiB
C
/* packet-srvloc.c
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* Routines for SRVLOC (Service Location Protocol) packet dissection
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* Copyright 1999, James Coe <jammer@cin.net>
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*
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* NOTE: This is Alpha software not all features have been verified yet.
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* In particular I have not had an opportunity to see how it
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* responds to SRVLOC over TCP.
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*
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* $Id: packet-srvloc.c,v 1.25 2001/07/15 19:14:00 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* Service Location Protocol is RFC 2165
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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 <time.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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#include "strutil.h"
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static int proto_srvloc = -1;
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static int hf_srvloc_version = -1;
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static int hf_srvloc_function = -1;
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static int hf_srvloc_flags = -1;
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static int hf_srvloc_error = -1;
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static gint ett_srvloc = -1;
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static gint ett_srvloc_flags = -1;
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#define TCP_PORT_SRVLOC 427
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#define UDP_PORT_SRVLOC 427
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/* Define function types */
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#define SRVREQ 1
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#define SRVRPLY 2
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#define SRVREG 3
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#define SRVDEREG 4
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#define SRVACK 5
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#define ATTRRQST 6
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#define ATTRRPLY 7
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#define DAADVERT 8
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#define SRVTYPERQST 9
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#define SRVTYPERPLY 10
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/* Create protocol header structure */
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struct srvloc_hdr {
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guint8 version;
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guint8 function;
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guint16 length;
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guint8 flags;
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guint8 dialect;
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u_char language[2];
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guint16 encoding;
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guint16 xid;
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};
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/* List to resolve function numbers to names */
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static const value_string srvloc_functions[] = {
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{ SRVREQ, "Service Request" },
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{ SRVRPLY, "Service Reply" },
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{ SRVREG, "Service Registration" },
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{ SRVDEREG, "Service Deregister" },
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{ SRVACK, "Service Acknowledge" },
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{ ATTRRQST, "Attribute Request" },
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{ ATTRRPLY, "Attribute Reply" },
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{ DAADVERT, "DA Advertisement" },
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{ SRVTYPERQST, "Service Type Request" },
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{ SRVTYPERPLY, "Service Type Reply" },
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{ 0, NULL }
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};
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/* List to resolve flag values to names */
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/* Define flag masks */
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#define FLAG_O 0x80
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#define FLAG_M 0x40
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#define FLAG_U 0x20
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#define FLAG_A 0x10
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#define FLAG_F 0x08
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/* Define Error Codes */
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#define SUCCESS 0
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#define LANG_NOT_SPTD 1
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#define PROT_PARSE_ERR 2
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#define INVLD_REG 3
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#define SCOPE_NOT_SPTD 4
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#define CHRSET_NOT_UND 5
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#define AUTH_ABSENT 6
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#define AUTH_FAILED 7
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/* List to resolve error codes to names */
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static const value_string srvloc_errs[] = {
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{ SUCCESS, "No Error" },
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{ LANG_NOT_SPTD, "Language not supported" },
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{ PROT_PARSE_ERR, "Protocol parse error" },
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{ INVLD_REG, "Invalid registration" },
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{ SCOPE_NOT_SPTD, "Scope not supported" },
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{ CHRSET_NOT_UND, "Character set not understood" },
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{ AUTH_ABSENT, "Authentication absent" },
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{ AUTH_FAILED, "Authentication failed" },
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{ 0, NULL }
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};
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/*
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* Character encodings.
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* This is a small subset of what's in
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*
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* http://www.isi.edu/in-notes/iana/assignments/character-sets
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*
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* XXX - we should do something useful with this, i.e. properly
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* handle strings based on the character set they're in.
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*
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* XXX - what does "properly handle strings" mean? How do we know
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* what character set the terminal can handle (for tty-based code)
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* or the GUI can handle (for GUI code)?
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*
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* XXX - the Ethereal core really should be what does all the
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* character set handling for strings, and it should be stuck with
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* the task of figuring out how to properly handle them.
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*/
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#define CHARSET_ASCII 3
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#define CHARSET_ISO_10646_UTF_1 27
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#define CHARSET_ISO_646_BASIC 28
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#define CHARSET_ISO_646_IRV 30
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#define CHARSET_ISO_8859_1 4
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#define CHARSET_ISO_10646_UCS_2 1000 /* a/k/a Unicode */
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#define CHARSET_UTF_7 1012
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#define CHARSET_UTF_8 106
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static const value_string charsets[] = {
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{ CHARSET_ASCII, "US-ASCII" },
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{ CHARSET_ISO_10646_UTF_1, "ISO 10646 UTF-1" },
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{ CHARSET_ISO_646_BASIC, "ISO 646 basic:1983" },
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{ CHARSET_ISO_646_IRV, "ISO 646 IRV:1983" },
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{ CHARSET_ISO_8859_1, "ISO 8859-1" },
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{ CHARSET_ISO_10646_UCS_2, "Unicode" },
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{ CHARSET_UTF_7, "UTF-7" },
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{ CHARSET_UTF_8, "UTF-8" },
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{ 0, NULL }
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};
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static int
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dissect_authblk(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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struct tm *stamp;
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time_t seconds;
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double floatsec;
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guint16 length;
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seconds = tvb_get_ntohl(tvb, offset) - 2208988800ul;
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stamp = gmtime(&seconds);
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if (stamp != NULL) {
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floatsec = stamp->tm_sec + tvb_get_ntohl(tvb, offset + 4) / 4294967296.0;
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proto_tree_add_text(tree, tvb, offset, 8,
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"Timestamp: %04d-%02d-%02d %02d:%02d:%07.4f UTC",
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stamp->tm_year + 1900, stamp->tm_mon + 1,
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stamp->tm_mday, stamp->tm_hour, stamp->tm_min,
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floatsec);
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} else {
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proto_tree_add_text(tree, tvb, offset, 8, "Timestamp not representable");
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}
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proto_tree_add_text(tree, tvb, offset + 8, 2, "Block Structure Desciptor: %u",
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tvb_get_ntohs(tvb, offset + 8));
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length = tvb_get_ntohs(tvb, offset + 10);
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proto_tree_add_text(tree, tvb, offset + 10, 2, "Authenticator length: %u",
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length);
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offset += 12;
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proto_tree_add_text(tree, tvb, offset, length, "Authentication block: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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return offset;
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}
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/* Packet dissection routine called by tcp & udp when port 427 detected */
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static void
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dissect_srvloc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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int offset = 0;
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proto_item *ti, *tf;
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proto_tree *srvloc_tree, *srvloc_flags;
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guint8 version;
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guint8 function;
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guint16 encoding;
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guint16 length;
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guint8 flags;
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guint32 count;
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "SRVLOC");
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if (check_col(pinfo->fd, COL_INFO))
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col_clear(pinfo->fd, COL_INFO);
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version = tvb_get_guint8(tvb, offset);
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function = tvb_get_guint8(tvb, offset + 1);
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if (check_col(pinfo->fd, COL_INFO))
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col_add_str(pinfo->fd, COL_INFO,
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val_to_str(function, srvloc_functions, "Unknown Function (%u)"));
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if (tree) {
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ti = proto_tree_add_item(tree, proto_srvloc, tvb, offset,
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tvb_length(tvb), FALSE);
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srvloc_tree = proto_item_add_subtree(ti, ett_srvloc);
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proto_tree_add_uint(srvloc_tree, hf_srvloc_version, tvb, offset, 1,
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version);
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proto_tree_add_uint(srvloc_tree, hf_srvloc_function, tvb, offset + 1, 1,
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function);
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length = tvb_get_ntohs(tvb, offset + 2);
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proto_tree_add_text(srvloc_tree, tvb, offset + 2, 2, "Length: %u",
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length);
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flags = tvb_get_guint8(tvb, offset + 4);
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tf = proto_tree_add_uint(srvloc_tree, hf_srvloc_flags, tvb, offset + 4, 1,
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flags);
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srvloc_flags = proto_item_add_subtree(tf, ett_srvloc_flags);
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proto_tree_add_text(srvloc_flags, tvb, offset + 4, 0, "Overflow %d... .xxx", (flags & FLAG_O) >> 7 );
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proto_tree_add_text(srvloc_flags, tvb, offset + 4, 0, "Monolingual .%d.. .xxx", (flags & FLAG_M) >> 6 );
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proto_tree_add_text(srvloc_flags, tvb, offset + 4, 0, "URL Authentication Present ..%d. .xxx", (flags & FLAG_U) >> 5 );
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proto_tree_add_text(srvloc_flags, tvb, offset + 4, 0, "Attribute Authentication Present ...%d .xxx", (flags & FLAG_A) >> 4 );
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proto_tree_add_text(srvloc_flags, tvb, offset + 4, 0, "Fresh Service Entry .... %dxxx", (flags & FLAG_F) >> 3 );
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proto_tree_add_text(srvloc_tree, tvb, offset + 5, 1, "Dialect: %u",
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tvb_get_guint8(tvb, offset + 5));
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proto_tree_add_text(srvloc_tree, tvb, offset + 6, 2, "Language: %s",
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tvb_format_text(tvb, offset + 6, 2));
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encoding = tvb_get_ntohs(tvb, offset + 8);
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proto_tree_add_text(srvloc_tree, tvb, offset + 8, 2, "Encoding: %u (%s)",
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encoding,
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val_to_str(encoding, charsets, "Unknown"));
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proto_tree_add_text(srvloc_tree, tvb, offset + 10, 2, "Transaction ID: %u",
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tvb_get_ntohs(tvb, offset + 10));
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offset += 12;
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switch (function) {
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case SRVREQ:
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proto_tree_add_text(srvloc_tree, tvb, offset, 0, "Service Request");
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Previous Response List Length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Previous Response List: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Predicate length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Predicate: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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break;
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case SRVRPLY:
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proto_tree_add_text(srvloc_tree, tvb, offset, 0, "Service Reply");
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proto_tree_add_item(srvloc_tree, hf_srvloc_error, tvb, offset, 2, FALSE);
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offset += 2;
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count = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "URL Count: %u",
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count);
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offset += 2;
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while (count > 0) {
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "URL lifetime: %u",
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tvb_get_ntohs(tvb, offset));
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offset += 2;
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "URL length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Service URL: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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if ( (flags & FLAG_U) == FLAG_U )
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offset = dissect_authblk(tvb, offset, srvloc_tree);
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count--;
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};
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break;
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case SRVREG:
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proto_tree_add_text(srvloc_tree, tvb, offset, 0, "Service Registration");
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "URL lifetime: %u",
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tvb_get_ntohs(tvb, offset));
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offset += 2;
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "URL length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Service URL: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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if ( (flags & FLAG_U) == FLAG_U )
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offset = dissect_authblk(tvb, offset, srvloc_tree);
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Attribute List length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Attribute List: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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if ( (flags & FLAG_A) == FLAG_A )
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offset = dissect_authblk(tvb, offset, srvloc_tree);
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break;
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case SRVDEREG:
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proto_tree_add_text(srvloc_tree, tvb, offset, 0, "Service Deregister");
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "URL length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Service URL: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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if ( (flags & FLAG_U) == FLAG_U )
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offset = dissect_authblk(tvb, offset, srvloc_tree);
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Attribute List length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Attribute List: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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if ( (flags & FLAG_A) == FLAG_A )
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offset = dissect_authblk(tvb, offset, srvloc_tree);
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break;
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case SRVACK:
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proto_tree_add_text(srvloc_tree, tvb, offset, 0, "Service Acknowledge");
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proto_tree_add_item(srvloc_tree, hf_srvloc_error, tvb, offset, 2, FALSE);
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offset += 2;
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break;
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case ATTRRQST:
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proto_tree_add_text(srvloc_tree, tvb, offset, 0, "Attribute Request");
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Previous Response List Length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Previous Response List: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "URL length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Service URL: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Scope List Length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Scope Response List: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Attribute List length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Attribute List: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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break;
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case ATTRRPLY:
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proto_tree_add_text(srvloc_tree, tvb, offset, 0, "Attribute Reply");
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proto_tree_add_item(srvloc_tree, hf_srvloc_error, tvb, offset, 2, FALSE);
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offset += 2;
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Attribute List length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Attribute List: %s",
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tvb_format_text(tvb, offset, length));
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offset += length;
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if ( (flags & FLAG_A) == FLAG_A )
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offset = dissect_authblk(tvb, offset, srvloc_tree);
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break;
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case DAADVERT:
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proto_tree_add_text(srvloc_tree, tvb, offset, 0, "DA Advertisement");
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proto_tree_add_item(srvloc_tree, hf_srvloc_error, tvb, offset, 2, FALSE);
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offset += 2;
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(srvloc_tree, tvb, offset, 2, "URL length: %u",
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length);
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offset += 2;
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proto_tree_add_text(srvloc_tree, tvb, offset, length, "Service URL: %s",
|
|
tvb_format_text(tvb, offset, length));
|
|
offset += length;
|
|
length = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Scope List Length: %u",
|
|
length);
|
|
offset += 2;
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, length, "Scope Response List: %s",
|
|
tvb_format_text(tvb, offset, length));
|
|
offset += length;
|
|
break;
|
|
|
|
case SRVTYPERQST:
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, 0, "Service Type Request");
|
|
length = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Previous Response List Length: %u",
|
|
length);
|
|
offset += 2;
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, length, "Previous Response List: %s",
|
|
tvb_format_text(tvb, offset, length));
|
|
offset += length;
|
|
length = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Naming Authority List length: %u",
|
|
length);
|
|
offset += 2;
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, length, "Naming Authority List: %s",
|
|
tvb_format_text(tvb, offset, length));
|
|
offset += length;
|
|
length = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Scope List Length: %u",
|
|
length);
|
|
offset += 2;
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, length, "Scope Response List: %s",
|
|
tvb_format_text(tvb, offset, length));
|
|
offset += length;
|
|
break;
|
|
|
|
case SRVTYPERPLY:
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, 0, "Service Type Reply");
|
|
proto_tree_add_item(srvloc_tree, hf_srvloc_error, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
count = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Service Type Count: %u",
|
|
count);
|
|
offset += 2;
|
|
while (count > 0) {
|
|
length = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Service Type List length: %u",
|
|
length);
|
|
offset += 2;
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, length, "Service Type List: %s",
|
|
tvb_format_text(tvb, offset, length));
|
|
offset += length;
|
|
count--;
|
|
};
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(srvloc_tree, tvb, offset, tvb_length_remaining(tvb, offset), "Unknown Function Type");
|
|
};
|
|
};
|
|
}
|
|
|
|
/* Register protocol with Ethereal. */
|
|
|
|
void
|
|
proto_register_srvloc(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_srvloc_version,
|
|
{ "Version", "srvloc.version",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_srvloc_function,
|
|
{"Function", "srvloc.function",
|
|
FT_UINT8, BASE_DEC, VALS(srvloc_functions), 0x0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_srvloc_flags,
|
|
{"Flags", "srvloc.flags",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_srvloc_error,
|
|
{"Error Code", "srvloc.err",
|
|
FT_UINT16, BASE_DEC, VALS(srvloc_errs), 0x0,
|
|
"", HFILL }
|
|
},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_srvloc,
|
|
&ett_srvloc_flags,
|
|
};
|
|
|
|
proto_srvloc = proto_register_protocol("Service Location Protocol",
|
|
"SRVLOC", "srvloc");
|
|
proto_register_field_array(proto_srvloc, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
};
|
|
|
|
void
|
|
proto_reg_handoff_srvloc(void)
|
|
{
|
|
dissector_add("tcp.port", TCP_PORT_SRVLOC, dissect_srvloc, proto_srvloc);
|
|
dissector_add("udp.port", UDP_PORT_SRVLOC, dissect_srvloc, proto_srvloc);
|
|
}
|
|
|