forked from osmocom/wireshark
1576 lines
54 KiB
C
1576 lines
54 KiB
C
/* packet-cops.c
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* Routines for the COPS (Common Open Policy Service) protocol dissection
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* RFC2748 & COPS-PR extension RFC3084
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*
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* Copyright 2000, Heikki Vatiainen <hessu@cs.tut.fi>
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*
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* $Id: packet-cops.c,v 1.43 2004/02/18 10:11:51 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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* 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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#include <string.h>
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#include <ctype.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include "packet-ipv6.h"
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#include "packet-tcp.h"
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#ifdef HAVE_SOME_SNMP
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#ifdef HAVE_NET_SNMP
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# include <net-snmp/net-snmp-config.h>
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# include <net-snmp/mib_api.h>
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# include <net-snmp/library/default_store.h>
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# include <net-snmp/config_api.h>
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#else /* HAVE_NET_SNMP */
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# include <ucd-snmp/ucd-snmp-config.h>
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# include <ucd-snmp/asn1.h>
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# include <ucd-snmp/snmp_api.h>
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# include <ucd-snmp/snmp_impl.h>
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# include <ucd-snmp/mib.h>
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# include <ucd-snmp/default_store.h>
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# include <ucd-snmp/read_config.h>
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# include <ucd-snmp/tools.h>
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#endif /* HAVE_NET_SNMP */
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#endif /* HAVE_SOME_SNMP */
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#include "asn1.h"
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#include "format-oid.h"
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#include "prefs.h"
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#define TCP_PORT_COPS 3288
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/* Preference: Variable to hold the tcp port preference */
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static guint global_cops_tcp_port = TCP_PORT_COPS;
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/* Preference: desegmentation of COPS */
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static gboolean cops_desegment = TRUE;
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/* Variable to allow for proper deletion of dissector registration
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* when the user changes port from the gui
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*/
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static guint cops_tcp_port = 0;
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/*Some local globals needed to read COPS-PR ASN.1 Types from PIB-MIBs */
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/*MAX_OID_LEN from NET-SNMP's asn1.h*/
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#ifdef HAVE_NET_SNMP
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static subid_t last_decoded_prid_oid[MAX_OID_LEN]={0};
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static subid_t last_decoded_prid_oid_length=0;
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extern struct tree *tree_head;
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/* Preference: COPS-PR ASN.1 type decoding based on PIB/MIB or data in packet */
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static gboolean cops_typefrommib = FALSE;
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#endif /* HAVE_NET_SNMP */
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#define COPS_OBJECT_HDR_SIZE 4
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/* Null string of type "guchar[]". */
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static const guchar nullstring[] = "";
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#define SAFE_STRING(s) (((s) != NULL) ? (s) : nullstring)
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/* COPS PR Tags */
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#define COPS_IPA 0 /* IP Address */
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#define COPS_U32 2 /* Unsigned 32*/
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#define COPS_TIT 3 /* TimeTicks */
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#define COPS_OPQ 4 /* Opaque */
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#define COPS_I64 10 /* Integer64 */
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#define COPS_U64 11 /* Uinteger64 */
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/* COPS PR Types */
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#define COPS_NULL 0
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#define COPS_INTEGER 1 /* l */
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#define COPS_OCTETSTR 2 /* c */
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#define COPS_OBJECTID 3 /* ul */
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#define COPS_IPADDR 4 /* uc */
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#define COPS_UNSIGNED32 5 /* ul */
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#define COPS_TIMETICKS 7 /* ul */
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#define COPS_OPAQUE 8 /* c */
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#define COPS_INTEGER64 10 /* ll */
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#define COPS_UNSIGNED64 11 /* ull */
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typedef struct _COPS_CNV COPS_CNV;
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struct _COPS_CNV
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{
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guint class;
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guint tag;
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gint syntax;
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gchar *name;
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};
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static COPS_CNV CopsCnv [] =
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{
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{ASN1_UNI, ASN1_NUL, COPS_NULL, "NULL"},
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{ASN1_UNI, ASN1_INT, COPS_INTEGER, "INTEGER"},
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{ASN1_UNI, ASN1_OTS, COPS_OCTETSTR, "OCTET STRING"},
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{ASN1_UNI, ASN1_OJI, COPS_OBJECTID, "OBJECTID"},
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{ASN1_APL, COPS_IPA, COPS_IPADDR, "IPADDR"},
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{ASN1_APL, COPS_U32, COPS_UNSIGNED32,"UNSIGNED32"},
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{ASN1_APL, COPS_TIT, COPS_TIMETICKS, "TIMETICKS"},
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{ASN1_APL, COPS_OPQ, COPS_OPAQUE, "OPAQUE"},
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{ASN1_APL, COPS_I64, COPS_INTEGER64, "INTEGER64"},
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{ASN1_APL, COPS_U64, COPS_UNSIGNED64, "UNSIGNED64"},
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{0, 0, -1, NULL}
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};
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static gchar *
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cops_tag_cls2syntax ( guint tag, guint cls, gushort *syntax)
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{
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COPS_CNV *cnv;
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cnv = CopsCnv;
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while (cnv->syntax != -1)
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{
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if (cnv->tag == tag && cnv->class == cls)
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{
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*syntax = cnv->syntax;
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return cnv->name;
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}
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cnv++;
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}
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return NULL;
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}
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static const value_string cops_flags_vals[] = {
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{ 0x00, "None" },
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{ 0x01, "Solicited Message Flag Bit" },
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{ 0, NULL },
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};
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/* The different COPS message types */
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enum cops_op_code {
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COPS_NO_MSG, /* Not a COPS Message type */
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COPS_MSG_REQ, /* Request (REQ) */
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COPS_MSG_DEC, /* Decision (DEC) */
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COPS_MSG_RPT, /* Report State (RPT) */
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COPS_MSG_DRQ, /* Delete Request State (DRQ) */
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COPS_MSG_SSQ, /* Synchronize State Req (SSQ) */
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COPS_MSG_OPN, /* Client-Open (OPN) */
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COPS_MSG_CAT, /* Client-Accept (CAT) */
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COPS_MSG_CC, /* Client-Close (CC) */
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COPS_MSG_KA, /* Keep-Alive (KA) */
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COPS_MSG_SSC, /* Synchronize Complete (SSC) */
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COPS_LAST_OP_CODE /* For error checking */
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};
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static const value_string cops_op_code_vals[] = {
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{ COPS_MSG_REQ, "Request (REQ)" },
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{ COPS_MSG_DEC, "Decision (DEC)" },
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{ COPS_MSG_RPT, "Report State (RPT)" },
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{ COPS_MSG_DRQ, "Delete Request State (DRQ)" },
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{ COPS_MSG_SSQ, "Synchronize State Req (SSQ)" },
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{ COPS_MSG_OPN, "Client-Open (OPN)" },
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{ COPS_MSG_CAT, "Client-Accept (CAT)" },
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{ COPS_MSG_CC, "Client-Close (CC)" },
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{ COPS_MSG_KA, "Keep-Alive (KA)" },
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{ COPS_MSG_SSC, "Synchronize Complete (SSC)" },
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{ 0, NULL },
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};
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/* The different objects in COPS messages */
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enum cops_c_num {
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COPS_NO_OBJECT, /* Not a COPS Object type */
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COPS_OBJ_HANDLE, /* Handle Object (Handle) */
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COPS_OBJ_CONTEXT, /* Context Object (Context) */
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COPS_OBJ_IN_INT, /* In-Interface Object (IN-Int) */
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COPS_OBJ_OUT_INT, /* Out-Interface Object (OUT-Int) */
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COPS_OBJ_REASON, /* Reason Object (Reason) */
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COPS_OBJ_DECISION, /* Decision Object (Decision) */
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COPS_OBJ_LPDPDECISION, /* LPDP Decision Object (LPDPDecision) */
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COPS_OBJ_ERROR, /* Error Object (Error) */
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COPS_OBJ_CLIENTSI, /* Client Specific Information Object (ClientSI) */
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COPS_OBJ_KATIMER, /* Keep-Alive Timer Object (KATimer) */
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COPS_OBJ_PEPID, /* PEP Identification Object (PEPID) */
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COPS_OBJ_REPORT_TYPE, /* Report-Type Object (Report-Type) */
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COPS_OBJ_PDPREDIRADDR, /* PDP Redirect Address Object (PDPRedirAddr) */
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COPS_OBJ_LASTPDPADDR, /* Last PDP Address (LastPDPaddr) */
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COPS_OBJ_ACCTTIMER, /* Accounting Timer Object (AcctTimer) */
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COPS_OBJ_INTEGRITY, /* Message Integrity Object (Integrity) */
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COPS_LAST_C_NUM /* For error checking */
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};
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static const value_string cops_c_num_vals[] = {
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{ COPS_OBJ_HANDLE, "Handle Object (Handle)" },
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{ COPS_OBJ_CONTEXT, "Context Object (Context)" },
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{ COPS_OBJ_IN_INT, "In-Interface Object (IN-Int)" },
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{ COPS_OBJ_OUT_INT, "Out-Interface Object (OUT-Int)" },
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{ COPS_OBJ_REASON, "Reason Object (Reason)" },
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{ COPS_OBJ_DECISION, "Decision Object (Decision)" },
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{ COPS_OBJ_LPDPDECISION, "LPDP Decision Object (LPDPDecision)" },
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{ COPS_OBJ_ERROR, "Error Object (Error)" },
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{ COPS_OBJ_CLIENTSI, "Client Specific Information Object (ClientSI)" },
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{ COPS_OBJ_KATIMER, "Keep-Alive Timer Object (KATimer)" },
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{ COPS_OBJ_PEPID, "PEP Identification Object (PEPID)" },
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{ COPS_OBJ_REPORT_TYPE, "Report-Type Object (Report-Type)" },
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{ COPS_OBJ_PDPREDIRADDR, "PDP Redirect Address Object (PDPRedirAddr)" },
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{ COPS_OBJ_LASTPDPADDR, "Last PDP Address (LastPDPaddr)" },
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{ COPS_OBJ_ACCTTIMER, "Accounting Timer Object (AcctTimer)" },
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{ COPS_OBJ_INTEGRITY, "Message Integrity Object (Integrity)" },
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{ 0, NULL },
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};
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/* The different objects in COPS-PR messages */
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enum cops_s_num {
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COPS_NO_PR_OBJECT, /* Not a COPS-PR Object type */
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COPS_OBJ_PRID, /* Provisioning Instance Identifier (PRID) */
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COPS_OBJ_PPRID, /* Prefix Provisioning Instance Identifier (PPRID) */
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COPS_OBJ_EPD, /* Encoded Provisioning Instance Data (EPD) */
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COPS_OBJ_GPERR, /* Global Provisioning Error Object (GPERR) */
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COPS_OBJ_CPERR, /* PRC Class Provisioning Error Object (CPERR) */
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COPS_OBJ_ERRPRID, /* Error Provisioning Instance Identifier (ErrorPRID)*/
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COPS_LAST_S_NUM /* For error checking */
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};
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static const value_string cops_s_num_vals[] = {
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{ COPS_OBJ_PRID, "Provisioning Instance Identifier (PRID)" },
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{ COPS_OBJ_PPRID, "Prefix Provisioning Instance Identifier (PPRID)" },
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{ COPS_OBJ_EPD, "Encoded Provisioning Instance Data (EPD)" },
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{ COPS_OBJ_GPERR, "Global Provisioning Error Object (GPERR)" },
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{ COPS_OBJ_CPERR, "PRC Class Provisioning Error Object (CPERR)" },
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{ COPS_OBJ_ERRPRID, "Error Provisioning Instance Identifier (ErrorPRID)" },
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{ 0, NULL },
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};
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/* R-Type is carried within the Context Object */
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static const value_string cops_r_type_vals[] = {
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{ 0x01, "Incoming-Message/Admission Control request" },
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{ 0x02, "Resource-Allocation request" },
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{ 0x04, "Outgoing-Message request" },
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{ 0x08, "Configuration request" },
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{ 0, NULL },
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};
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/* S-Type is carried within the ClientSI Object for COPS-PR*/
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static const value_string cops_s_type_vals[] = {
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{ 0x01, "BER" },
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{ 0, NULL },
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};
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/* Reason-Code is carried within the Reason object */
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static const value_string cops_reason_vals[] = {
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{ 1, "Unspecified" },
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{ 2, "Management" },
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{ 3, "Preempted (Another request state takes precedence)" },
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{ 4, "Tear (Used to communicate a signaled state removal)" },
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{ 5, "Timeout (Local state has timed-out)" },
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{ 6, "Route Change (Change invalidates request state)" },
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{ 7, "Insufficient Resources (No local resource available)" },
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{ 8, "PDP's Directive (PDP decision caused the delete)" },
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{ 9, "Unsupported decision (PDP decision not supported)" },
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{ 10, "Synchronize Handle Unknown" },
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{ 11, "Transient Handle (stateless event)" },
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{ 12, "Malformed Decision (could not recover)" },
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{ 13, "Unknown COPS Object from PDP" },
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{ 0, NULL },
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};
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/* Command-Code is carried within the Decision object if C-Type is 1 */
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static const value_string cops_dec_cmd_code_vals[] = {
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{ 0, "NULL Decision (No configuration data available)" },
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{ 1, "Install (Admit request/Install configuration)" },
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{ 2, "Remove (Remove request/Remove configuration)" },
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{ 0, NULL },
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};
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/* Decision flags are also carried with the Decision object if C-Type is 1 */
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static const value_string cops_dec_cmd_flag_vals[] = {
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{ 0x00, "<None set>" },
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{ 0x01, "Trigger Error (Trigger error message if set)" },
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{ 0, NULL },
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};
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/* Error-Code from Error object */
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static const value_string cops_error_vals[] = {
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{1, "Bad handle" },
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{2, "Invalid handle reference" },
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{3, "Bad message format (Malformed Message)" },
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{4, "Unable to process (server gives up on query)" },
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{5, "Mandatory client-specific info missing" },
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{6, "Unsupported client" },
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{7, "Mandatory COPS object missing" },
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{8, "Client Failure" },
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{9, "Communication Failure" },
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{10, "Unspecified" },
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{11, "Shutting down" },
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{12, "Redirect to Preferred Server" },
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{13, "Unknown COPS Object" },
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{14, "Authentication Failure" },
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{15, "Authentication Required" },
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{0, NULL },
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};
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/* Error-Code from GPERR object */
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static const value_string cops_gperror_vals[] = {
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{1, "AvailMemLow" },
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{2, "AvailMemExhausted" },
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{3, "unknownASN.1Tag" },
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{4, "maxMsgSizeExceeded" },
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{5, "unknownError" },
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{6, "maxRequestStatesOpen" },
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{7, "invalidASN.1Length" },
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{8, "invalidObjectPad" },
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{9, "unknownPIBData" },
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{10, "unknownCOPSPRObject" },
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{11, "malformedDecision" },
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{0, NULL },
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};
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/* Error-Code from CPERR object */
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static const value_string cops_cperror_vals[] = {
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{1, "priSpaceExhausted" },
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{2, "priInstanceInvalid" },
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{3, "attrValueInvalid" },
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{4, "attrValueSupLimited" },
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{5, "attrEnumSupLimited" },
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{6, "attrMaxLengthExceeded" },
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{7, "attrReferenceUnknown" },
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{8, "priNotifyOnly" },
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{9, "unknownPrc" },
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{10, "tooFewAttrs" },
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{11, "invalidAttrType" },
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{12, "deletedInRef" },
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{13, "priSpecificError" },
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{0, NULL },
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};
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/* Report-Type from Report-Type object */
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static const value_string cops_report_type_vals[] = {
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{1, " Success : Decision was successful at the PEP" },
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{2, " Failure : Decision could not be completed by PEP" },
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{3, " Accounting: Accounting update for an installed state" },
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{0, NULL },
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};
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/* Initialize the protocol and registered fields */
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static gint proto_cops = -1;
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static gint hf_cops_ver_flags = -1;
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static gint hf_cops_version = -1;
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static gint hf_cops_flags = -1;
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static gint hf_cops_op_code = -1;
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static gint hf_cops_client_type = -1;
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static gint hf_cops_msg_len = -1;
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static gint hf_cops_obj_len = -1;
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static gint hf_cops_obj_c_num = -1;
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static gint hf_cops_obj_c_type = -1;
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static gint hf_cops_obj_s_num = -1;
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static gint hf_cops_obj_s_type = -1;
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static gint hf_cops_r_type_flags = -1;
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static gint hf_cops_m_type_flags = -1;
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static gint hf_cops_in_int_ipv4 = -1;
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static gint hf_cops_in_int_ipv6 = -1;
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static gint hf_cops_out_int_ipv4 = -1;
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static gint hf_cops_out_int_ipv6 = -1;
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static gint hf_cops_int_ifindex = -1;
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static gint hf_cops_reason = -1;
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static gint hf_cops_reason_sub = -1;
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static gint hf_cops_dec_cmd_code = -1;
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static gint hf_cops_dec_flags = -1;
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static gint hf_cops_error = -1;
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static gint hf_cops_error_sub = -1;
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static gint hf_cops_gperror = -1;
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static gint hf_cops_gperror_sub = -1;
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static gint hf_cops_cperror = -1;
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static gint hf_cops_cperror_sub = -1;
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static gint hf_cops_katimer = -1;
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static gint hf_cops_pepid = -1;
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static gint hf_cops_report_type = -1;
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static gint hf_cops_pdprediraddr_ipv4 = -1;
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static gint hf_cops_pdprediraddr_ipv6 = -1;
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static gint hf_cops_lastpdpaddr_ipv4 = -1;
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static gint hf_cops_lastpdpaddr_ipv6 = -1;
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static gint hf_cops_pdp_tcp_port = -1;
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static gint hf_cops_accttimer = -1;
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static gint hf_cops_key_id = -1;
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static gint hf_cops_seq_num = -1;
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/* Initialize the subtree pointers */
|
|
static gint ett_cops = -1;
|
|
static gint ett_cops_ver_flags = -1;
|
|
static gint ett_cops_obj = -1;
|
|
static gint ett_cops_pr_obj = -1;
|
|
static gint ett_cops_obj_data = -1;
|
|
static gint ett_cops_r_type_flags = -1;
|
|
static gint ett_cops_itf = -1;
|
|
static gint ett_cops_reason = -1;
|
|
static gint ett_cops_decision = -1;
|
|
static gint ett_cops_error = -1;
|
|
static gint ett_cops_clientsi = -1;
|
|
static gint ett_cops_asn1 = -1;
|
|
static gint ett_cops_gperror = -1;
|
|
static gint ett_cops_cperror = -1;
|
|
static gint ett_cops_pdp = -1;
|
|
|
|
void proto_reg_handoff_cops(void);
|
|
|
|
static guint get_cops_pdu_len(tvbuff_t *tvb, int offset);
|
|
static void dissect_cops_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
|
|
|
|
static int dissect_cops_object(tvbuff_t *tvb, guint32 offset, proto_tree *tree);
|
|
static void dissect_cops_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *tree,
|
|
guint8 c_num, guint8 c_type, guint16 len);
|
|
|
|
static void dissect_cops_pr_objects(tvbuff_t *tvb, guint32 offset, proto_tree *tree, guint16 pr_len);
|
|
static int dissect_cops_pr_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *tree,
|
|
guint8 s_num, guint8 s_type, guint16 len);
|
|
|
|
/* Code to actually dissect the packets */
|
|
static void
|
|
dissect_cops(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
tcp_dissect_pdus(tvb, pinfo, tree, cops_desegment, 8,
|
|
get_cops_pdu_len, dissect_cops_pdu);
|
|
}
|
|
|
|
static guint
|
|
get_cops_pdu_len(tvbuff_t *tvb, int offset)
|
|
{
|
|
/*
|
|
* Get the length of the COPS message.
|
|
*/
|
|
return tvb_get_ntohl(tvb, offset + 4);
|
|
}
|
|
|
|
static void
|
|
dissect_cops_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
guint8 op_code;
|
|
int object_len;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "COPS");
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
op_code = tvb_get_guint8(tvb, 1);
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "COPS %s",
|
|
val_to_str(op_code, cops_op_code_vals, "Unknown Op Code"));
|
|
|
|
if (tree) {
|
|
proto_item *ti, *tv;
|
|
proto_tree *cops_tree, *ver_flags_tree;
|
|
guint32 msg_len;
|
|
guint32 offset = 0;
|
|
guint8 ver_flags;
|
|
gint garbage;
|
|
|
|
ti = proto_tree_add_item(tree, proto_cops, tvb, offset, -1, FALSE);
|
|
cops_tree = proto_item_add_subtree(ti, ett_cops);
|
|
|
|
/* Version and flags share the same byte, put them in a subtree */
|
|
ver_flags = tvb_get_guint8(tvb, offset);
|
|
tv = proto_tree_add_uint_format(cops_tree, hf_cops_ver_flags, tvb, offset, 1,
|
|
ver_flags, "Version: %u, Flags: %s",
|
|
hi_nibble(ver_flags),
|
|
val_to_str(lo_nibble(ver_flags), cops_flags_vals, "Unknown"));
|
|
ver_flags_tree = proto_item_add_subtree(tv, ett_cops_ver_flags);
|
|
proto_tree_add_uint(ver_flags_tree, hf_cops_version, tvb, offset, 1, ver_flags);
|
|
proto_tree_add_uint(ver_flags_tree, hf_cops_flags, tvb, offset, 1, ver_flags);
|
|
offset++;
|
|
|
|
proto_tree_add_item(cops_tree, hf_cops_op_code, tvb, offset, 1, FALSE);
|
|
offset ++;
|
|
proto_tree_add_item(cops_tree, hf_cops_client_type, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
msg_len = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_uint(cops_tree, hf_cops_msg_len, tvb, offset, 4, msg_len);
|
|
offset += 4;
|
|
|
|
while (tvb_reported_length_remaining(tvb, offset) >= COPS_OBJECT_HDR_SIZE) {
|
|
object_len = dissect_cops_object(tvb, offset, cops_tree);
|
|
if (object_len < 0)
|
|
return;
|
|
offset += object_len;
|
|
}
|
|
|
|
garbage = tvb_length_remaining(tvb, offset);
|
|
if (garbage > 0)
|
|
proto_tree_add_text(cops_tree, tvb, offset, garbage,
|
|
"Trailing garbage: %d byte%s", garbage,
|
|
plurality(garbage, "", "s"));
|
|
}
|
|
}
|
|
|
|
static char *cops_c_type_to_str(guint8 c_num, guint8 c_type)
|
|
{
|
|
switch (c_num) {
|
|
case COPS_OBJ_HANDLE:
|
|
if (c_type == 1)
|
|
return "Client Handle";
|
|
break;
|
|
case COPS_OBJ_IN_INT:
|
|
case COPS_OBJ_OUT_INT:
|
|
if (c_type == 1)
|
|
return "IPv4 Address + Interface";
|
|
else if (c_type == 2)
|
|
return "IPv6 Address + Interface";
|
|
break;
|
|
case COPS_OBJ_DECISION:
|
|
case COPS_OBJ_LPDPDECISION:
|
|
if (c_type == 1)
|
|
return "Decision Flags (Mandatory)";
|
|
else if (c_type == 2)
|
|
return "Stateless Data";
|
|
else if (c_type == 3)
|
|
return "Replacement Data";
|
|
else if (c_type == 4)
|
|
return "Client Specific Decision Data";
|
|
else if (c_type == 5)
|
|
return "Named Decision Data";
|
|
break;
|
|
case COPS_OBJ_CLIENTSI:
|
|
if (c_type == 1)
|
|
return "Signaled ClientSI";
|
|
else if (c_type == 2)
|
|
return "Named ClientSI";
|
|
break;
|
|
case COPS_OBJ_KATIMER:
|
|
if (c_type == 1)
|
|
return "Keep-alive timer value";
|
|
break;
|
|
case COPS_OBJ_PDPREDIRADDR:
|
|
case COPS_OBJ_LASTPDPADDR:
|
|
if (c_type == 1)
|
|
return "IPv4 Address + TCP Port";
|
|
else if (c_type == 2)
|
|
return "IPv6 Address + TCP Port";
|
|
break;
|
|
case COPS_OBJ_ACCTTIMER:
|
|
if (c_type == 1)
|
|
return "Accounting timer value";
|
|
break;
|
|
case COPS_OBJ_INTEGRITY:
|
|
if (c_type == 1)
|
|
return "HMAC digest";
|
|
break;
|
|
}
|
|
|
|
return "";
|
|
}
|
|
|
|
static int dissect_cops_object(tvbuff_t *tvb, guint32 offset, proto_tree *tree)
|
|
{
|
|
guint16 object_len, contents_len;
|
|
guint8 c_num, c_type;
|
|
proto_item *ti;
|
|
proto_tree *obj_tree;
|
|
char *type_str;
|
|
|
|
object_len = tvb_get_ntohs(tvb, offset);
|
|
if (object_len < COPS_OBJECT_HDR_SIZE) {
|
|
/* Bogus! */
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Bad COPS object length: %u, should be at least %u",
|
|
object_len, COPS_OBJECT_HDR_SIZE);
|
|
return -1;
|
|
}
|
|
c_num = tvb_get_guint8(tvb, offset + 2);
|
|
c_type = tvb_get_guint8(tvb, offset + 3);
|
|
|
|
ti = proto_tree_add_uint_format(tree, hf_cops_obj_c_num, tvb, offset, object_len, c_num,
|
|
"%s: %s", val_to_str(c_num, cops_c_num_vals, "Unknown"),
|
|
cops_c_type_to_str(c_num, c_type));
|
|
obj_tree = proto_item_add_subtree(ti, ett_cops_obj);
|
|
|
|
proto_tree_add_uint(obj_tree, hf_cops_obj_len, tvb, offset, 2, object_len);
|
|
offset += 2;
|
|
|
|
proto_tree_add_uint(obj_tree, hf_cops_obj_c_num, tvb, offset, 1, c_num);
|
|
offset++;
|
|
|
|
type_str = cops_c_type_to_str(c_num, c_type);
|
|
proto_tree_add_text(obj_tree, tvb, offset, 1, "C-Type: %s%s%u%s",
|
|
type_str,
|
|
strlen(type_str) ? " (" : "",
|
|
c_type,
|
|
strlen(type_str) ? ")" : "");
|
|
offset++;
|
|
|
|
contents_len = object_len - COPS_OBJECT_HDR_SIZE;
|
|
dissect_cops_object_data(tvb, offset, obj_tree, c_num, c_type, contents_len);
|
|
|
|
/* Pad to 32bit boundary */
|
|
if (object_len % sizeof (guint32))
|
|
object_len += (sizeof (guint32) - object_len % sizeof (guint32));
|
|
|
|
return object_len;
|
|
}
|
|
|
|
static void dissect_cops_pr_objects(tvbuff_t *tvb, guint32 offset, proto_tree *tree, guint16 pr_len)
|
|
{
|
|
guint16 object_len, contents_len;
|
|
guint8 s_num, s_type;
|
|
char *type_str;
|
|
int ret;
|
|
proto_tree *cops_pr_tree, *obj_tree;
|
|
proto_item *ti;
|
|
|
|
cops_pr_tree = proto_item_add_subtree(tree, ett_cops_pr_obj);
|
|
|
|
while (pr_len >= COPS_OBJECT_HDR_SIZE) {
|
|
object_len = tvb_get_ntohs(tvb, offset);
|
|
if (object_len < COPS_OBJECT_HDR_SIZE) {
|
|
/* Bogus! */
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Bad COPS PR object length: %u, should be at least %u",
|
|
object_len, COPS_OBJECT_HDR_SIZE);
|
|
return;
|
|
}
|
|
s_num = tvb_get_guint8(tvb, offset + 2);
|
|
|
|
ti = proto_tree_add_uint_format(cops_pr_tree, hf_cops_obj_s_num, tvb, offset, object_len, s_num,
|
|
"%s", val_to_str(s_num, cops_s_num_vals, "Unknown"));
|
|
obj_tree = proto_item_add_subtree(cops_pr_tree, ett_cops_pr_obj);
|
|
|
|
proto_tree_add_uint(obj_tree, hf_cops_obj_len, tvb, offset, 2, object_len);
|
|
offset += 2;
|
|
pr_len -= 2;
|
|
|
|
proto_tree_add_uint(obj_tree, hf_cops_obj_s_num, tvb, offset, 1, s_num);
|
|
offset++;
|
|
pr_len--;
|
|
|
|
s_type = tvb_get_guint8(tvb, offset);
|
|
type_str = val_to_str(s_type, cops_s_type_vals, "Unknown");
|
|
proto_tree_add_text(obj_tree, tvb, offset, 1, "S-Type: %s%s%u%s",
|
|
type_str,
|
|
strlen(type_str) ? " (" : "",
|
|
s_type,
|
|
strlen(type_str) ? ")" : "");
|
|
offset++;
|
|
pr_len--;
|
|
|
|
contents_len = object_len - COPS_OBJECT_HDR_SIZE;
|
|
ret = dissect_cops_pr_object_data(tvb, offset, obj_tree, s_num, s_type, contents_len);
|
|
if (ret < 0)
|
|
break;
|
|
|
|
/*Pad to 32bit boundary */
|
|
if (object_len % sizeof (guint32))
|
|
object_len += (sizeof (guint32) - object_len % sizeof (guint32));
|
|
|
|
pr_len -= object_len - COPS_OBJECT_HDR_SIZE;
|
|
offset += object_len - COPS_OBJECT_HDR_SIZE;
|
|
}
|
|
}
|
|
|
|
static void dissect_cops_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *tree,
|
|
guint8 c_num, guint8 c_type, guint16 len)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *r_type_tree, *itf_tree, *reason_tree, *dec_tree, *error_tree, *clientsi_tree, *pdp_tree;
|
|
guint16 r_type, m_type, reason, reason_sub, cmd_code, cmd_flags, error, error_sub, tcp_port;
|
|
guint32 ipv4addr, ifindex;
|
|
struct e_in6_addr ipv6addr;
|
|
|
|
switch (c_num) {
|
|
case COPS_OBJ_CONTEXT:
|
|
r_type = tvb_get_ntohs(tvb, offset);
|
|
m_type = tvb_get_ntohs(tvb, offset + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: R-Type: %s, M-Type: %u",
|
|
val_to_str(r_type, cops_r_type_vals, "Unknown"),
|
|
m_type);
|
|
|
|
r_type_tree = proto_item_add_subtree(ti, ett_cops_r_type_flags);
|
|
proto_tree_add_uint(r_type_tree, hf_cops_r_type_flags, tvb, offset, 2, r_type);
|
|
offset += 2;
|
|
proto_tree_add_uint(r_type_tree, hf_cops_m_type_flags, tvb, offset, 2, m_type);
|
|
|
|
break;
|
|
case COPS_OBJ_IN_INT:
|
|
case COPS_OBJ_OUT_INT:
|
|
if (c_type == 1) { /* IPv4 */
|
|
tvb_memcpy(tvb, (guint8 *)&ipv4addr, offset, 4);
|
|
ifindex = tvb_get_ntohl(tvb, offset + 4);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 8, "Contents: IPv4 address %s, ifIndex: %u",
|
|
ip_to_str((guint8 *)&ipv4addr), ifindex);
|
|
itf_tree = proto_item_add_subtree(ti, ett_cops_itf);
|
|
proto_tree_add_ipv4(itf_tree,
|
|
(c_num == COPS_OBJ_IN_INT) ? hf_cops_in_int_ipv4 : hf_cops_out_int_ipv4,
|
|
tvb, offset, 4, ipv4addr);
|
|
offset += 4;
|
|
} else if (c_type == 2) { /* IPv6 */
|
|
tvb_memcpy(tvb, (guint8 *)&ipv6addr, offset, sizeof ipv6addr);
|
|
ifindex = tvb_get_ntohl(tvb, offset + sizeof ipv6addr);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 20, "Contents: IPv6 address %s, ifIndex: %u",
|
|
ip6_to_str(&ipv6addr), ifindex);
|
|
itf_tree = proto_item_add_subtree(ti, ett_cops_itf);
|
|
proto_tree_add_ipv6(itf_tree,
|
|
(c_num == COPS_OBJ_IN_INT) ? hf_cops_in_int_ipv6 : hf_cops_out_int_ipv6,
|
|
tvb, offset, 16, (guint8 *)&ipv6addr);
|
|
offset += 16;
|
|
} else {
|
|
break;
|
|
}
|
|
proto_tree_add_uint(itf_tree, hf_cops_int_ifindex, tvb, offset, 4, ifindex);
|
|
|
|
break;
|
|
case COPS_OBJ_REASON:
|
|
reason = tvb_get_ntohs(tvb, offset);
|
|
reason_sub = tvb_get_ntohs(tvb, offset + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: Reason-Code: %s, Reason Sub-code: 0x%04x",
|
|
val_to_str(reason, cops_reason_vals, "<Unknown value>"), reason_sub);
|
|
reason_tree = proto_item_add_subtree(ti, ett_cops_reason);
|
|
proto_tree_add_uint(reason_tree, hf_cops_reason, tvb, offset, 2, reason);
|
|
offset += 2;
|
|
if (reason == 13) {
|
|
proto_tree_add_text(reason_tree, tvb, offset, 2, "Reason Sub-code: "
|
|
"Unknown object's C-Num %u, C-Type %u",
|
|
tvb_get_guint8(tvb, offset), tvb_get_guint8(tvb, offset + 1));
|
|
} else
|
|
proto_tree_add_uint(reason_tree, hf_cops_reason_sub, tvb, offset, 2, reason_sub);
|
|
|
|
break;
|
|
case COPS_OBJ_DECISION:
|
|
case COPS_OBJ_LPDPDECISION:
|
|
if (c_type == 1) {
|
|
cmd_code = tvb_get_ntohs(tvb, offset);
|
|
cmd_flags = tvb_get_ntohs(tvb, offset + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: Command-Code: %s, Flags: %s",
|
|
val_to_str(cmd_code, cops_dec_cmd_code_vals, "<Unknown value>"),
|
|
val_to_str(cmd_flags, cops_dec_cmd_flag_vals, "<Unknown flag>"));
|
|
dec_tree = proto_item_add_subtree(ti, ett_cops_decision);
|
|
proto_tree_add_uint(dec_tree, hf_cops_dec_cmd_code, tvb, offset, 2, cmd_code);
|
|
offset += 2;
|
|
proto_tree_add_uint(dec_tree, hf_cops_dec_flags, tvb, offset, 2, cmd_flags);
|
|
} else if (c_type == 5) { /*COPS-PR Data*/
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: %u bytes", len);
|
|
dec_tree = proto_item_add_subtree(ti, ett_cops_decision);
|
|
dissect_cops_pr_objects(tvb, offset, dec_tree, len);
|
|
}
|
|
|
|
break;
|
|
case COPS_OBJ_ERROR:
|
|
if (c_type != 1)
|
|
break;
|
|
|
|
error = tvb_get_ntohs(tvb, offset);
|
|
error_sub = tvb_get_ntohs(tvb, offset + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: Error-Code: %s, Error Sub-code: 0x%04x",
|
|
val_to_str(error, cops_error_vals, "<Unknown value>"), error_sub);
|
|
error_tree = proto_item_add_subtree(ti, ett_cops_error);
|
|
proto_tree_add_uint(error_tree, hf_cops_error, tvb, offset, 2, error);
|
|
offset += 2;
|
|
if (error == 13) {
|
|
proto_tree_add_text(error_tree, tvb, offset, 2, "Error Sub-code: "
|
|
"Unknown object's C-Num %u, C-Type %u",
|
|
tvb_get_guint8(tvb, offset), tvb_get_guint8(tvb, offset + 1));
|
|
} else
|
|
proto_tree_add_uint(error_tree, hf_cops_error_sub, tvb, offset, 2, error_sub);
|
|
|
|
break;
|
|
case COPS_OBJ_CLIENTSI:
|
|
|
|
if (c_type != 2) /*Not COPS-PR data*/
|
|
break;
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: %u bytes", len);
|
|
clientsi_tree = proto_item_add_subtree(ti, ett_cops_clientsi);
|
|
|
|
dissect_cops_pr_objects(tvb, offset, clientsi_tree, len);
|
|
|
|
break;
|
|
case COPS_OBJ_KATIMER:
|
|
if (c_type != 1)
|
|
break;
|
|
|
|
proto_tree_add_item(tree, hf_cops_katimer, tvb, offset + 2, 2, FALSE);
|
|
if (tvb_get_ntohs(tvb, offset + 2) == 0)
|
|
proto_tree_add_text(tree, tvb, offset, 0, "Value of zero implies infinity.");
|
|
|
|
break;
|
|
case COPS_OBJ_PEPID:
|
|
if (c_type != 1)
|
|
break;
|
|
|
|
if (tvb_strnlen(tvb, offset, len) == -1)
|
|
proto_tree_add_text(tree, tvb, offset, len, "<PEP Id is not a NUL terminated ASCII string>");
|
|
else
|
|
proto_tree_add_item(tree, hf_cops_pepid, tvb, offset,
|
|
tvb_strnlen(tvb, offset, len) + 1, FALSE);
|
|
|
|
break;
|
|
case COPS_OBJ_REPORT_TYPE:
|
|
if (c_type != 1)
|
|
break;
|
|
|
|
proto_tree_add_item(tree, hf_cops_report_type, tvb, offset, 2, FALSE);
|
|
|
|
break;
|
|
case COPS_OBJ_PDPREDIRADDR:
|
|
case COPS_OBJ_LASTPDPADDR:
|
|
if (c_type == 1) { /* IPv4 */
|
|
tvb_memcpy(tvb, (guint8 *)&ipv4addr, offset, 4);
|
|
tcp_port = tvb_get_ntohs(tvb, offset + 4 + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 8, "Contents: IPv4 address %s, TCP Port Number: %u",
|
|
ip_to_str((guint8 *)&ipv4addr), tcp_port);
|
|
pdp_tree = proto_item_add_subtree(ti, ett_cops_pdp);
|
|
proto_tree_add_ipv4(pdp_tree,
|
|
(c_num == COPS_OBJ_PDPREDIRADDR) ? hf_cops_pdprediraddr_ipv4 : hf_cops_lastpdpaddr_ipv4,
|
|
tvb, offset, 4, ipv4addr);
|
|
offset += 4;
|
|
} else if (c_type == 2) { /* IPv6 */
|
|
tvb_memcpy(tvb, (guint8 *)&ipv6addr, offset, sizeof ipv6addr);
|
|
tcp_port = tvb_get_ntohs(tvb, offset + sizeof ipv6addr + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 20, "Contents: IPv6 address %s, TCP Port Number: %u",
|
|
ip6_to_str(&ipv6addr), tcp_port);
|
|
pdp_tree = proto_item_add_subtree(ti, ett_cops_pdp);
|
|
proto_tree_add_ipv6(pdp_tree,
|
|
(c_num == COPS_OBJ_PDPREDIRADDR) ? hf_cops_pdprediraddr_ipv6 : hf_cops_lastpdpaddr_ipv6,
|
|
tvb, offset, 16, (guint8 *)&ipv6addr);
|
|
offset += 16;
|
|
} else {
|
|
break;
|
|
}
|
|
offset += 2;
|
|
proto_tree_add_uint(pdp_tree, hf_cops_pdp_tcp_port, tvb, offset, 2, tcp_port);
|
|
|
|
break;
|
|
case COPS_OBJ_ACCTTIMER:
|
|
if (c_type != 1)
|
|
break;
|
|
|
|
proto_tree_add_item(tree, hf_cops_accttimer, tvb, offset + 2, 2, FALSE);
|
|
if (tvb_get_ntohs(tvb, offset + 2) == 0)
|
|
proto_tree_add_text(tree, tvb, offset, 0, "Value of zero means "
|
|
"there SHOULD be no unsolicited accounting updates.");
|
|
|
|
break;
|
|
case COPS_OBJ_INTEGRITY:
|
|
if (c_type != 1)
|
|
break; /* Not HMAC digest */
|
|
|
|
proto_tree_add_item(tree, hf_cops_key_id, tvb, offset, 4, FALSE);
|
|
proto_tree_add_item(tree, hf_cops_seq_num, tvb, offset + 4, 4, FALSE);
|
|
proto_tree_add_text(tree, tvb, offset + 8 , len - 8, "Contents: Keyed Message Digest");
|
|
|
|
break;
|
|
default:
|
|
proto_tree_add_text(tree, tvb, offset, len, "Contents: %u bytes", len);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_NET_SNMP
|
|
static guchar*format_asn_value (struct variable_list *variable, subid_t *variable_oid,
|
|
guint variable_oid_length, u_char type_from_packet)
|
|
{
|
|
struct tree *subtree=tree_head;
|
|
|
|
guchar *buf=NULL;
|
|
size_t buf_len=0;
|
|
size_t out_len=0;
|
|
|
|
/*Get the ASN.1 type etc. from the PIB-MIB. If unsuccessful use the type from packet*/
|
|
subtree = get_tree(variable_oid,variable_oid_length, subtree);
|
|
|
|
if (subtree->type == 0)
|
|
variable->type= type_from_packet;
|
|
|
|
buf_len = SPRINT_MAX_LEN; /*defined in NET-SNMP's snmp-impl.h*/
|
|
buf = g_malloc(buf_len);
|
|
*buf = '\0';
|
|
out_len = 0;
|
|
|
|
/*If the ASN.1 type was found from PIB-MIB, use it for decoding*/
|
|
if (!variable->type)
|
|
variable->type=mib_to_asn_type(subtree->type);
|
|
|
|
if (!sprint_realloc_by_type(&buf, &buf_len, &out_len, TRUE, variable, subtree->enums, subtree->hint, NULL))
|
|
sprintf(buf,"%s","sprint_realloc_by_type failed");
|
|
|
|
return buf;
|
|
}
|
|
#endif /* HAVE_NET_SNMP */
|
|
|
|
static int decode_cops_pr_asn1_data(tvbuff_t *tvb, guint32 offset,
|
|
proto_tree *tree, guint asnlen, guint8 cops_pr_obj
|
|
#ifndef HAVE_NET_SNMP
|
|
_U_
|
|
#endif
|
|
)
|
|
{
|
|
ASN1_SCK asn1;
|
|
int start;
|
|
gboolean def;
|
|
guint length;
|
|
|
|
guint vb_length;
|
|
gushort vb_type;
|
|
gchar *vb_type_name;
|
|
|
|
int ret;
|
|
guint cls, con, tag;
|
|
subid_t epd_attribute_index=0;
|
|
|
|
gint32 vb_integer_value;
|
|
guint32 vb_uinteger_value;
|
|
|
|
guint8 *vb_octet_string;
|
|
|
|
subid_t *vb_oid;
|
|
guint vb_oid_length;
|
|
|
|
gchar *vb_display_string;
|
|
gchar *vb_display_string2;
|
|
|
|
#ifdef HAVE_NET_SNMP
|
|
struct variable_list variable;
|
|
long value;
|
|
#endif /* HAVE_NET_SNMP */
|
|
|
|
unsigned int i;
|
|
gchar *buf;
|
|
int len;
|
|
|
|
while (asnlen > 0) { /*while there is ASN stuff to be decoded*/
|
|
|
|
epd_attribute_index++;
|
|
#ifdef HAVE_NET_SNMP
|
|
last_decoded_prid_oid[last_decoded_prid_oid_length-1]=epd_attribute_index;
|
|
#endif /* HAVE_NET_SNMP */
|
|
asn1_open(&asn1, tvb, offset);
|
|
|
|
/* parse the type of the object */
|
|
|
|
start = asn1.offset;
|
|
|
|
ret = asn1_header_decode (&asn1, &cls, &con, &tag, &def, &vb_length);
|
|
if (ret != ASN1_ERR_NOERROR)
|
|
return 0;
|
|
if (!def)
|
|
return ASN1_ERR_LENGTH_NOT_DEFINITE;
|
|
|
|
/* Convert the class, constructed flag, and tag to a type. */
|
|
vb_type_name = cops_tag_cls2syntax(tag, cls, &vb_type);
|
|
if (vb_type_name == NULL) {
|
|
/*
|
|
* Unsupported type.
|
|
* Dissect the value as an opaque string of octets.
|
|
*/
|
|
vb_type_name = "unsupported type";
|
|
vb_type = COPS_OPAQUE;
|
|
}
|
|
|
|
/* parse the value */
|
|
|
|
switch (vb_type) {
|
|
|
|
case COPS_INTEGER:
|
|
ret = asn1_int32_value_decode(&asn1, vb_length, &vb_integer_value);
|
|
if (ret != ASN1_ERR_NOERROR)
|
|
return ret;
|
|
length = asn1.offset - start;
|
|
if (tree) {
|
|
#ifdef HAVE_NET_SNMP
|
|
if (cops_typefrommib == TRUE)
|
|
{
|
|
variable.type = 0;
|
|
value = vb_integer_value;
|
|
variable.val.integer = &value;
|
|
variable.val_len = vb_length ;
|
|
vb_display_string=format_asn_value(&variable,
|
|
last_decoded_prid_oid,last_decoded_prid_oid_length,ASN_INTEGER);
|
|
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length,
|
|
"Value: %s", vb_display_string);
|
|
g_free(vb_display_string);
|
|
}
|
|
else
|
|
#endif /* HAVE_NET_SNMP */
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length,
|
|
"Value: %s: %d (%#x)", vb_type_name,
|
|
vb_integer_value, vb_integer_value);
|
|
}
|
|
break;
|
|
|
|
case COPS_UNSIGNED32:
|
|
case COPS_TIMETICKS:
|
|
ret = asn1_uint32_value_decode(&asn1, vb_length, &vb_uinteger_value);
|
|
if (ret != ASN1_ERR_NOERROR)
|
|
return ret;
|
|
length = asn1.offset - start;
|
|
if (tree) {
|
|
#ifdef HAVE_NET_SNMP
|
|
if (cops_typefrommib == TRUE)
|
|
{
|
|
variable.type = 0;
|
|
value = vb_uinteger_value;
|
|
variable.val.integer = &value;
|
|
variable.val_len = vb_length;
|
|
|
|
vb_display_string=format_asn_value(&variable,
|
|
last_decoded_prid_oid,last_decoded_prid_oid_length,ASN_UINTEGER);
|
|
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length, "Value %s: %s",vb_type_name, vb_display_string);
|
|
|
|
g_free(vb_display_string);
|
|
}
|
|
else
|
|
#endif /* HAVE_NET_SNMP */
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length,
|
|
"Value: %s: %u (%#x)", vb_type_name,
|
|
vb_uinteger_value, vb_uinteger_value);
|
|
}
|
|
break;
|
|
|
|
case COPS_OCTETSTR:
|
|
case COPS_IPADDR:
|
|
case COPS_OPAQUE:
|
|
case COPS_UNSIGNED64:
|
|
case COPS_INTEGER64:
|
|
ret = asn1_string_value_decode (&asn1, vb_length, &vb_octet_string);
|
|
if (ret != ASN1_ERR_NOERROR)
|
|
return ret;
|
|
length = asn1.offset - start;
|
|
if (tree) {
|
|
#ifdef HAVE_NET_SNMP
|
|
if (cops_typefrommib == TRUE)
|
|
{
|
|
variable.type = 0;
|
|
variable.val.string = vb_octet_string;
|
|
variable.val_len = vb_length;
|
|
vb_display_string = format_asn_value(&variable,
|
|
last_decoded_prid_oid,last_decoded_prid_oid_length,ASN_OCTET_STR);
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length,
|
|
"Value: %s (ASN.1 type from packet: %s)", vb_display_string, vb_type_name);
|
|
|
|
g_free(vb_display_string);
|
|
}
|
|
else
|
|
{
|
|
#endif /* HAVE_NET_SNMP */
|
|
for (i = 0; i < vb_length; i++) {
|
|
if (!(isprint(vb_octet_string[i]) ||isspace(vb_octet_string[i])))
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If some characters are not printable, display the string as bytes.
|
|
*/
|
|
if (i < vb_length) {
|
|
/*
|
|
* We stopped, due to a non-printable character, before we got
|
|
* to the end of the string.
|
|
*/
|
|
vb_display_string = g_malloc(4*vb_length);
|
|
buf = &vb_display_string[0];
|
|
len = sprintf(buf, "%03u", vb_octet_string[0]);
|
|
buf += len;
|
|
for (i = 1; i < vb_length; i++) {
|
|
len = sprintf(buf, ".%03u", vb_octet_string[i]);
|
|
buf += len;
|
|
}
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length,
|
|
"Value: %s: %s", vb_type_name, vb_display_string);
|
|
g_free(vb_display_string);
|
|
} else {
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length,
|
|
"Value: %s: %.*s", vb_type_name, (int)vb_length,
|
|
SAFE_STRING(vb_octet_string));
|
|
}
|
|
#ifdef HAVE_NET_SNMP
|
|
}
|
|
#endif /* HAVE_NET_SNMP */
|
|
}
|
|
g_free(vb_octet_string);
|
|
break;
|
|
|
|
case COPS_NULL:
|
|
ret = asn1_null_decode (&asn1, vb_length);
|
|
if (ret != ASN1_ERR_NOERROR)
|
|
return ret;
|
|
length = asn1.offset - start;
|
|
if (tree)
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length, "Value: %s", vb_type_name);
|
|
break;
|
|
|
|
case COPS_OBJECTID:
|
|
ret = asn1_oid_value_decode (&asn1, vb_length, &vb_oid, &vb_oid_length);
|
|
if (ret != ASN1_ERR_NOERROR)
|
|
return ret;
|
|
length = asn1.offset - start;
|
|
|
|
if (tree) {
|
|
if (cops_pr_obj == COPS_OBJ_PPRID){
|
|
/*we're decoding Prefix PRID, that doesn't have a instance Id,
|
|
*Use full length of the OID when decoding it.
|
|
*/
|
|
new_format_oid(vb_oid,vb_oid_length,&vb_display_string,&vb_display_string2);
|
|
|
|
if (!vb_display_string2) /*if OID couldn't be decoded, print only numeric format*/
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length,
|
|
"Value: %s: %s", vb_type_name, vb_display_string);
|
|
else
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length,
|
|
"Value: %s: %s (%s)", vb_type_name,
|
|
vb_display_string,
|
|
vb_display_string2);
|
|
}
|
|
else { /*we're decoding PRID, Error PRID or EPD*/
|
|
/*strip the instance Id from the OIDs before decoding and paste it back during printing*/
|
|
new_format_oid(vb_oid,vb_oid_length-1,&vb_display_string,&vb_display_string2);
|
|
|
|
if (!vb_display_string2) /*if OID couldn't be decoded, print only numeric format*/
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length,
|
|
"Value: %s: %s.%lu", vb_type_name,
|
|
vb_display_string,
|
|
(unsigned long)vb_oid[vb_oid_length-1]);
|
|
else
|
|
proto_tree_add_text(tree, asn1.tvb, offset, length,
|
|
"Value: %s: %s.%lu (%s.%lu)", vb_type_name,
|
|
vb_display_string,
|
|
(unsigned long)vb_oid[vb_oid_length-1],
|
|
vb_display_string2,
|
|
(unsigned long)vb_oid[vb_oid_length-1]);
|
|
}
|
|
#ifdef HAVE_NET_SNMP
|
|
if (cops_pr_obj != COPS_OBJ_EPD) {
|
|
/* we're not decoding EPD, so let's store the OID of the PRID so that later
|
|
when we're decoding this PRID's EPD we can finetune the output.*/
|
|
memcpy(last_decoded_prid_oid,vb_oid,vb_oid_length*sizeof(subid_t));
|
|
last_decoded_prid_oid_length=vb_oid_length;
|
|
}
|
|
#endif /* HAVE_NET_SNMP */
|
|
|
|
g_free(vb_display_string);
|
|
if(vb_display_string2)
|
|
g_free(vb_display_string2);
|
|
}
|
|
g_free(vb_oid);
|
|
break;
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
return ASN1_ERR_WRONG_TYPE;
|
|
}
|
|
|
|
asn1_close(&asn1,&offset);
|
|
|
|
asnlen -= length;
|
|
}
|
|
epd_attribute_index=0;
|
|
return 0;
|
|
}
|
|
|
|
static int dissect_cops_pr_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *tree,
|
|
guint8 s_num, guint8 s_type, guint16 len)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *asn1_object_tree, *gperror_tree, *cperror_tree;
|
|
guint16 gperror=0, gperror_sub=0, cperror=0, cperror_sub=0;
|
|
|
|
switch (s_num){
|
|
case COPS_OBJ_PRID:
|
|
if (s_type != 1) /* Not Provisioning Instance Identifier (PRID) */
|
|
break;
|
|
|
|
ti=proto_tree_add_text(tree, tvb, offset, len, "Contents:");
|
|
asn1_object_tree = proto_item_add_subtree(ti, ett_cops_asn1);
|
|
|
|
decode_cops_pr_asn1_data(tvb, offset, asn1_object_tree, len, COPS_OBJ_PRID);
|
|
|
|
break;
|
|
case COPS_OBJ_PPRID:
|
|
if (s_type != 1) /* Not Prefix Provisioning Instance Identifier (PPRID) */
|
|
break;
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, len, "Contents:");
|
|
asn1_object_tree = proto_item_add_subtree(ti, ett_cops_asn1);
|
|
|
|
decode_cops_pr_asn1_data(tvb, offset, asn1_object_tree, len, COPS_OBJ_PPRID);
|
|
|
|
break;
|
|
case COPS_OBJ_EPD:
|
|
if (s_type != 1) /* Not Encoded Provisioning Instance Data (EPD) */
|
|
break;
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, len, "Contents:");
|
|
asn1_object_tree = proto_item_add_subtree(ti, ett_cops_asn1);
|
|
|
|
decode_cops_pr_asn1_data(tvb, offset, asn1_object_tree, len, COPS_OBJ_EPD);
|
|
|
|
break;
|
|
case COPS_OBJ_GPERR:
|
|
if (s_type != 1) /* Not Global Provisioning Error Object (GPERR) */
|
|
break;
|
|
|
|
gperror = tvb_get_ntohs(tvb, offset);
|
|
gperror_sub = tvb_get_ntohs(tvb, offset + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: Error-Code: %s, Error Sub-code: 0x%04x",
|
|
val_to_str(gperror, cops_gperror_vals, "<Unknown value>"), gperror_sub);
|
|
gperror_tree = proto_item_add_subtree(ti, ett_cops_gperror);
|
|
proto_tree_add_uint(gperror_tree, hf_cops_gperror, tvb, offset, 2, gperror);
|
|
offset += 2;
|
|
if (cperror == 13) {
|
|
proto_tree_add_text(gperror_tree, tvb, offset, 2, "Error Sub-code: "
|
|
"Unknown object's C-Num %u, C-Type %u",
|
|
tvb_get_guint8(tvb, offset), tvb_get_guint8(tvb, offset + 1));
|
|
} else
|
|
proto_tree_add_uint(gperror_tree, hf_cops_gperror_sub, tvb, offset, 2, gperror_sub);
|
|
|
|
break;
|
|
case COPS_OBJ_CPERR:
|
|
if (s_type != 1) /*Not PRC Class Provisioning Error Object (CPERR) */
|
|
break;
|
|
|
|
break;
|
|
|
|
cperror = tvb_get_ntohs(tvb, offset);
|
|
cperror_sub = tvb_get_ntohs(tvb, offset + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: Error-Code: %s, Error Sub-code: 0x%04x",
|
|
val_to_str(cperror, cops_cperror_vals, "<Unknown value>"), cperror_sub);
|
|
cperror_tree = proto_item_add_subtree(ti, ett_cops_cperror);
|
|
proto_tree_add_uint(cperror_tree, hf_cops_cperror, tvb, offset, 2, cperror);
|
|
offset += 2;
|
|
if (cperror == 13) {
|
|
proto_tree_add_text(cperror_tree, tvb, offset, 2, "Error Sub-code: "
|
|
"Unknown object's S-Num %u, C-Type %u",
|
|
tvb_get_guint8(tvb, offset), tvb_get_guint8(tvb, offset + 1));
|
|
} else
|
|
proto_tree_add_uint(cperror_tree, hf_cops_cperror_sub, tvb, offset, 2, cperror_sub);
|
|
|
|
break;
|
|
case COPS_OBJ_ERRPRID:
|
|
if (s_type != 1) /*Not Error Provisioning Instance Identifier (ErrorPRID)*/
|
|
break;
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, len, "Contents:");
|
|
asn1_object_tree = proto_item_add_subtree(ti, ett_cops_asn1);
|
|
|
|
decode_cops_pr_asn1_data(tvb, offset, asn1_object_tree, len, COPS_OBJ_ERRPRID);
|
|
|
|
break;
|
|
default:
|
|
proto_tree_add_text(tree, tvb, offset, len, "Contents: %u bytes", len);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Register the protocol with Ethereal */
|
|
void proto_register_cops(void)
|
|
{
|
|
/* Setup list of header fields */
|
|
static hf_register_info hf[] = {
|
|
{ &hf_cops_ver_flags,
|
|
{ "Version and Flags", "cops.ver_flags",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"Version and Flags in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_version,
|
|
{ "Version", "cops.version",
|
|
FT_UINT8, BASE_DEC, NULL, 0xF0,
|
|
"Version in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_flags,
|
|
{ "Flags", "cops.flags",
|
|
FT_UINT8, BASE_HEX, VALS(cops_flags_vals), 0x0F,
|
|
"Flags in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_op_code,
|
|
{ "Op Code", "cops.op_code",
|
|
FT_UINT8, BASE_DEC, VALS(cops_op_code_vals), 0x0,
|
|
"Op Code in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_client_type,
|
|
{ "Client Type", "cops.client_type",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"Client Type in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_msg_len,
|
|
{ "Message Length", "cops.msg_len",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Message Length in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_obj_len,
|
|
{ "Object Length", "cops.obj.len",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Object Length in COPS Object Header", HFILL }
|
|
},
|
|
{ &hf_cops_obj_c_num,
|
|
{ "C-Num", "cops.c_num",
|
|
FT_UINT8, BASE_DEC, VALS(cops_c_num_vals), 0x0,
|
|
"C-Num in COPS Object Header", HFILL }
|
|
},
|
|
{ &hf_cops_obj_c_type,
|
|
{ "C-Type", "cops.c_type",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"C-Type in COPS Object Header", HFILL }
|
|
},
|
|
|
|
{ &hf_cops_obj_s_num,
|
|
{ "S-Num", "cops.s_num",
|
|
FT_UINT8, BASE_DEC, VALS(cops_s_num_vals), 0x0,
|
|
"S-Num in COPS-PR Object Header", HFILL }
|
|
},
|
|
{ &hf_cops_obj_s_type,
|
|
{ "S-Type", "cops.s_type",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"S-Type in COPS-PR Object Header", HFILL }
|
|
},
|
|
|
|
{ &hf_cops_r_type_flags,
|
|
{ "R-Type", "cops.context.r_type",
|
|
FT_UINT16, BASE_HEX, VALS(cops_r_type_vals), 0xFFFF,
|
|
"R-Type in COPS Context Object", HFILL }
|
|
},
|
|
{ &hf_cops_m_type_flags,
|
|
{ "M-Type", "cops.context.m_type",
|
|
FT_UINT16, BASE_HEX, NULL, 0xFFFF,
|
|
"M-Type in COPS Context Object", HFILL }
|
|
},
|
|
{ &hf_cops_in_int_ipv4,
|
|
{ "IPv4 address", "cops.in-int.ipv4",
|
|
FT_IPv4, 0, NULL, 0xFFFF,
|
|
"IPv4 address in COPS IN-Int object", HFILL }
|
|
},
|
|
{ &hf_cops_in_int_ipv6,
|
|
{ "IPv6 address", "cops.in-int.ipv6",
|
|
FT_IPv6, 0, NULL, 0xFFFF,
|
|
"IPv6 address in COPS IN-Int object", HFILL }
|
|
},
|
|
{ &hf_cops_out_int_ipv4,
|
|
{ "IPv4 address", "cops.out-int.ipv4",
|
|
FT_IPv4, 0, NULL, 0xFFFF,
|
|
"IPv4 address in COPS OUT-Int object", HFILL }
|
|
},
|
|
{ &hf_cops_out_int_ipv6,
|
|
{ "IPv6 address", "cops.out-int.ipv6",
|
|
FT_IPv6, 0, NULL, 0xFFFF,
|
|
"IPv6 address in COPS OUT-Int", HFILL }
|
|
},
|
|
{ &hf_cops_int_ifindex,
|
|
{ "ifIndex", "cops.in-out-int.ifindex",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"If SNMP is supported, corresponds to MIB-II ifIndex", HFILL }
|
|
},
|
|
{ &hf_cops_reason,
|
|
{ "Reason", "cops.reason",
|
|
FT_UINT16, BASE_DEC, VALS(cops_reason_vals), 0,
|
|
"Reason in Reason object", HFILL }
|
|
},
|
|
{ &hf_cops_reason_sub,
|
|
{ "Reason Sub-code", "cops.reason_sub",
|
|
FT_UINT16, BASE_HEX, NULL, 0,
|
|
"Reason Sub-code in Reason object", HFILL }
|
|
},
|
|
{ &hf_cops_dec_cmd_code,
|
|
{ "Command-Code", "cops.decision.cmd",
|
|
FT_UINT16, BASE_DEC, VALS(cops_dec_cmd_code_vals), 0,
|
|
"Command-Code in Decision/LPDP Decision object", HFILL }
|
|
},
|
|
{ &hf_cops_dec_flags,
|
|
{ "Flags", "cops.decision.flags",
|
|
FT_UINT16, BASE_HEX, VALS(cops_dec_cmd_flag_vals), 0xffff,
|
|
"Flags in Decision/LPDP Decision object", HFILL }
|
|
},
|
|
{ &hf_cops_error,
|
|
{ "Error", "cops.error",
|
|
FT_UINT16, BASE_DEC, VALS(cops_error_vals), 0,
|
|
"Error in Error object", HFILL }
|
|
},
|
|
{ &hf_cops_error_sub,
|
|
{ "Error Sub-code", "cops.error_sub",
|
|
FT_UINT16, BASE_HEX, NULL, 0,
|
|
"Error Sub-code in Error object", HFILL }
|
|
},
|
|
{ &hf_cops_katimer,
|
|
{ "Contents: KA Timer Value", "cops.katimer.value",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
"Keep-Alive Timer Value in KATimer object", HFILL }
|
|
},
|
|
{ &hf_cops_pepid,
|
|
{ "Contents: PEP Id", "cops.pepid.id",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
"PEP Id in PEPID object", HFILL }
|
|
},
|
|
{ &hf_cops_report_type,
|
|
{ "Contents: Report-Type", "cops.report_type",
|
|
FT_UINT16, BASE_DEC, VALS(cops_report_type_vals), 0,
|
|
"Report-Type in Report-Type object", HFILL }
|
|
},
|
|
{ &hf_cops_pdprediraddr_ipv4,
|
|
{ "IPv4 address", "cops.pdprediraddr.ipv4",
|
|
FT_IPv4, 0, NULL, 0xFFFF,
|
|
"IPv4 address in COPS PDPRedirAddr object", HFILL }
|
|
},
|
|
{ &hf_cops_pdprediraddr_ipv6,
|
|
{ "IPv6 address", "cops.pdprediraddr.ipv6",
|
|
FT_IPv6, 0, NULL, 0xFFFF,
|
|
"IPv6 address in COPS PDPRedirAddr object", HFILL }
|
|
},
|
|
{ &hf_cops_lastpdpaddr_ipv4,
|
|
{ "IPv4 address", "cops.lastpdpaddr.ipv4",
|
|
FT_IPv4, 0, NULL, 0xFFFF,
|
|
"IPv4 address in COPS LastPDPAddr object", HFILL }
|
|
},
|
|
{ &hf_cops_lastpdpaddr_ipv6,
|
|
{ "IPv6 address", "cops.lastpdpaddr.ipv6",
|
|
FT_IPv6, 0, NULL, 0xFFFF,
|
|
"IPv6 address in COPS LastPDPAddr object", HFILL }
|
|
},
|
|
{ &hf_cops_pdp_tcp_port,
|
|
{ "TCP Port Number", "cops.pdp.tcp_port",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"TCP Port Number of PDP in PDPRedirAddr/LastPDPAddr object", HFILL }
|
|
},
|
|
{ &hf_cops_accttimer,
|
|
{ "Contents: ACCT Timer Value", "cops.accttimer.value",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
"Accounting Timer Value in AcctTimer object", HFILL }
|
|
},
|
|
{ &hf_cops_key_id,
|
|
{ "Contents: Key ID", "cops.integrity.key_id",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"Key ID in Integrity object", HFILL }
|
|
},
|
|
{ &hf_cops_seq_num,
|
|
{ "Contents: Sequence Number", "cops.integrity.seq_num",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"Sequence Number in Integrity object", HFILL }
|
|
},
|
|
{ &hf_cops_gperror,
|
|
{ "Error", "cops.gperror",
|
|
FT_UINT16, BASE_DEC, VALS(cops_gperror_vals), 0,
|
|
"Error in Error object", HFILL }
|
|
},
|
|
{ &hf_cops_gperror_sub,
|
|
{ "Error Sub-code", "cops.gperror_sub",
|
|
FT_UINT16, BASE_HEX, NULL, 0,
|
|
"Error Sub-code in Error object", HFILL }
|
|
},
|
|
{ &hf_cops_cperror,
|
|
{ "Error", "cops.cperror",
|
|
FT_UINT16, BASE_DEC, VALS(cops_cperror_vals), 0,
|
|
"Error in Error object", HFILL }
|
|
},
|
|
{ &hf_cops_cperror_sub,
|
|
{ "Error Sub-code", "cops.cperror_sub",
|
|
FT_UINT16, BASE_HEX, NULL, 0,
|
|
"Error Sub-code in Error object", HFILL }
|
|
},
|
|
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_cops,
|
|
&ett_cops_ver_flags,
|
|
&ett_cops_obj,
|
|
&ett_cops_pr_obj,
|
|
&ett_cops_obj_data,
|
|
&ett_cops_r_type_flags,
|
|
&ett_cops_itf,
|
|
&ett_cops_reason,
|
|
&ett_cops_decision,
|
|
&ett_cops_error,
|
|
&ett_cops_clientsi,
|
|
&ett_cops_asn1,
|
|
&ett_cops_gperror,
|
|
&ett_cops_cperror,
|
|
&ett_cops_pdp,
|
|
};
|
|
|
|
module_t* cops_module;
|
|
|
|
/* Register the protocol name and description */
|
|
proto_cops = proto_register_protocol("Common Open Policy Service",
|
|
"COPS", "cops");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_cops, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* Register our configuration options for cops */
|
|
cops_module = prefs_register_protocol(proto_cops, proto_reg_handoff_cops);
|
|
prefs_register_uint_preference(cops_module,"tcp.cops_port",
|
|
"COPS TCP Port",
|
|
"Set the TCP port for COPS messages",
|
|
10,&global_cops_tcp_port);
|
|
prefs_register_bool_preference(cops_module, "desegment",
|
|
"Desegment all COPS messages\nspanning multiple TCP segments",
|
|
"Whether the COPS dissector should desegment all messages spanning multiple TCP segments",
|
|
&cops_desegment);
|
|
#ifdef HAVE_NET_SNMP /*enable preference only if compiled with NET-SNMP*/
|
|
prefs_register_bool_preference(cops_module, "typefrommib",
|
|
"Decode COPS-PR ASN.1 types by reading them\nfrom PIBs (converted to MIBs)",
|
|
"Whether the COPS dissector should decode COPS-PR ASN.1 types based on data types read from packet or PIBs (converted to MIBs)",
|
|
&cops_typefrommib);
|
|
#endif /*HAVE_NET_SNMP*/
|
|
}
|
|
|
|
void proto_reg_handoff_cops(void)
|
|
{
|
|
static int cops_prefs_initialized = FALSE;
|
|
static dissector_handle_t cops_handle;
|
|
|
|
if (!cops_prefs_initialized) {
|
|
cops_handle = create_dissector_handle(dissect_cops, proto_cops);
|
|
cops_prefs_initialized = TRUE;
|
|
} else
|
|
dissector_delete("tcp.port",cops_tcp_port,cops_handle);
|
|
|
|
/* Set our port numbers for future use */
|
|
cops_tcp_port = global_cops_tcp_port;
|
|
|
|
dissector_add("tcp.port", cops_tcp_port, cops_handle);
|
|
}
|