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COPS-PR extension support, from Kari Tiirikainen. 

Add support for desegmentation of COPS messages and for multiple COPS
messages per TCP segment.

svn path=/trunk/; revision=4781
This commit is contained in:
Guy Harris 2002-02-22 11:16:13 +00:00
parent d301d2cef4
commit cb5745cc1e
3 changed files with 753 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
AUTHORS
View File

@ -1051,6 +1051,10 @@ Adam Sulmicki <adam[AT]cfar.umd.edu> {
RADIUS_STRING rather than a RADIUS_STRING_TAGGED
}
Kari Tiirikainen <ktiirika[AT]stybba.ntc.nokia.com> {
COPS-PR extension support
}
Alain Magloire <alainm[AT]rcsm.ece.mcgill.ca> was kind enough to
give his permission to use his version of snprintf.c.

1
doc/ethereal.pod.template
View File

@ -1385,6 +1385,7 @@ B<http://www.ethereal.com>.
Alfred Arnold <Alfred.Arnold[AT]elsa.de>
Dermot Bradley <dermot.bradley[AT]openwave.com>
Adam Sulmicki <adam[AT]cfar.umd.edu>
Kari Tiirikainen <ktiirika[AT]stybba.ntc.nokia.com>
Alain Magloire <alainm[AT]rcsm.ece.mcgill.ca> was kind enough to give his
permission to use his version of snprintf.c.

781
packet-cops.c
View File

@ -1,10 +1,10 @@
/* packet-cops.c
* Routines for the COPS (Common Open Policy Service) protocol dissection
* RFC2748
* RFC2748 & COPS-PR extension RFC3084
*
* Copyright 2000, Heikki Vatiainen <hessu@cs.tut.fi>
*
* $Id: packet-cops.c,v 1.18 2002/02/22 02:56:58 hagbard Exp $
* $Id: packet-cops.c,v 1.19 2002/02/22 11:16:11 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
@ -31,11 +31,14 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <glib.h>
#include <epan/packet.h>
#include "packet-ipv6.h"
#include "packet-frame.h"
#include "asn1.h"
#include "prefs.h"
#define TCP_PORT_COPS 3288
@ -43,6 +46,9 @@
/* Variable to hold the tcp port preference */
static guint global_cops_tcp_port = TCP_PORT_COPS;
/* desegmentation of COPS */
static gboolean cops_desegment = TRUE;
/* Variable to allow for proper deletion of dissector registration
* when the user changes port from the gui
*/
@ -51,6 +57,77 @@ static guint cops_tcp_port = 0;
#define COPS_OBJECT_HDR_SIZE 4
/* Null string of type "guchar[]". */
static const guchar nullstring[] = "";
#define SAFE_STRING(s) (((s) != NULL) ? (s) : nullstring)
/* COPS PR Tags */
#define COPS_IPA 0 /* IP Address */
#define COPS_U32 2 /* Unsigned 32*/
#define COPS_TIT 3 /* TimeTicks */
#define COPS_OPQ 4 /* Opaque */
#define COPS_I64 10 /* Integer64 */
#define COPS_U64 11 /* Uinteger64 */
/* COPS PR Types */
#define COPS_NULL 0
#define COPS_INTEGER 1 /* l */
#define COPS_OCTETSTR 2 /* c */
#define COPS_OBJECTID 3 /* ul */
#define COPS_IPADDR 4 /* uc */
#define COPS_UNSIGNED32 5 /* ul */
#define COPS_TIMETICKS 7 /* ul */
#define COPS_OPAQUE 8 /* c */
#define COPS_INTEGER64 10 /* ll */
#define COPS_UNSIGNED64 11 /* ull */
typedef struct _COPS_CNV COPS_CNV;
struct _COPS_CNV
{
guint class;
guint tag;
gint syntax;
gchar *name;
};
static COPS_CNV CopsCnv [] =
{
{ASN1_UNI, ASN1_NUL, COPS_NULL, "NULL"},
{ASN1_UNI, ASN1_INT, COPS_INTEGER, "INTEGER"},
{ASN1_UNI, ASN1_OTS, COPS_OCTETSTR, "OCTET STRING"},
{ASN1_UNI, ASN1_OJI, COPS_OBJECTID, "OBJECTID"},
{ASN1_APL, COPS_IPA, COPS_IPADDR, "IPADDR"},
{ASN1_APL, COPS_U32, COPS_UNSIGNED32,"UNSIGNED32"},
{ASN1_APL, COPS_TIT, COPS_TIMETICKS, "TIMETICKS"},
{ASN1_APL, COPS_OPQ, COPS_OPAQUE, "OPAQUE"},
{ASN1_APL, COPS_I64, COPS_INTEGER64, "INTEGER64"},
{ASN1_APL, COPS_U64, COPS_UNSIGNED64, "UNSIGNED64"},
{0, 0, -1, NULL}
};
static gchar *
cops_tag_cls2syntax ( guint tag, guint cls, gushort *syntax)
{
COPS_CNV *cnv;
cnv = CopsCnv;
while (cnv->syntax != -1)
{
if (cnv->tag == tag && cnv->class == cls)
{
*syntax = cnv->syntax;
return cnv->name;
}
cnv++;
}
return NULL;
}
static const value_string cops_flags_vals[] = {
{ 0x00, "None" },
{ 0x01, "Solicited Message Flag Bit" },
@ -109,8 +186,7 @@ enum cops_c_num {
COPS_OBJ_PDPREDIRADDR, /* PDP Redirect Address Object (PDPRedirAddr) */
COPS_OBJ_LASTPDPADDR, /* Last PDP Address (LastPDPaddr) */
COPS_OBJ_ACCTTIMER, /* Accounting Timer Object (AcctTimer) */
COPS_OBJ_INTEGRITY, /* Message Integrity Object (Integrity) */
COPS_OBJ_INTEGRITY, /* Message Integrity Object (Integrity) */
COPS_LAST_C_NUM /* For error checking */
};
@ -132,6 +208,31 @@ static const value_string cops_c_num_vals[] = {
{ COPS_OBJ_ACCTTIMER, "Accounting Timer Object (AcctTimer)" },
{ COPS_OBJ_INTEGRITY, "Message Integrity Object (Integrity)" },
{ 0, NULL },
};
/* The different objects in COPS-PR messages */
enum cops_s_num {
COPS_NO_PR_OBJECT, /* Not a COPS-PR Object type */
COPS_OBJ_PRID, /* Provisioning Instance Identifier (PRID) */
COPS_OBJ_PPRID, /* Prefix Provisioning Instance Identifier (PPRID) */
COPS_OBJ_EPD, /* Encoded Provisioning Instance Data (EPD) */
COPS_OBJ_GPERR, /* Global Provisioning Error Object (GPERR) */
COPS_OBJ_CPERR, /* PRC Class Provisioning Error Object (CPERR) */
COPS_OBJ_ERRPRID, /* Error Provisioning Instance Identifier (ErrorPRID)*/
COPS_LAST_S_NUM /* For error checking */
};
static const value_string cops_s_num_vals[] = {
{ COPS_OBJ_PRID, "Provisioning Instance Identifier (PRID)" },
{ COPS_OBJ_PPRID, "Prefix Provisioning Instance Identifier (PPRID)" },
{ COPS_OBJ_EPD, "Encoded Provisioning Instance Data (EPD)" },
{ COPS_OBJ_GPERR, "Global Provisioning Error Object (GPERR)" },
{ COPS_OBJ_CPERR, "PRC Class Provisioning Error Object (CPERR)" },
{ COPS_OBJ_ERRPRID, "Error Provisioning Instance Identifier (ErrorPRID)" },
{ 0, NULL },
};
@ -143,6 +244,11 @@ static const value_string cops_r_type_vals[] = {
{ 0x08, "Configuration request" },
{ 0, NULL },
};
/* S-Type is carried within the ClientSI Object for COPS-PR*/
static const value_string cops_s_type_vals[] = {
{ 0x01, "BER" },
{ 0, NULL },
};
/* Reason-Code is carried within the Reason object */
static const value_string cops_reason_vals[] = {
@ -196,6 +302,40 @@ static const value_string cops_error_vals[] = {
{15, "Authentication Required" },
{0, NULL },
};
/* Error-Code from GPERR object */
static const value_string cops_gperror_vals[] = {
{1, "AvailMemLow" },
{2, "AvailMemExhausted" },
{3, "unknownASN.1Tag" },
{4, "maxMsgSizeExceeded" },
{5, "unknownError" },
{6, "maxRequestStatesOpen" },
{7, "invalidASN.1Length" },
{8, "invalidObjectPad" },
{9, "unknownPIBData" },
{10, "unknownCOPSPRObject" },
{11, "malformedDecision" },
{0, NULL },
};
/* Error-Code from CPERR object */
static const value_string cops_cperror_vals[] = {
{1, "priSpaceExhausted" },
{2, "priInstanceInvalid" },
{3, "attrValueInvalid" },
{4, "attrValueSupLimited" },
{5, "attrEnumSupLimited" },
{6, "attrMaxLengthExceeded" },
{7, "attrReferenceUnknown" },
{8, "priNotifyOnly" },
{9, "unknownPrc" },
{10, "tooFewAttrs" },
{11, "invalidAttrType" },
{12, "deletedInRef" },
{13, "priSpecificError" },
{0, NULL },
};
/* Report-Type from Report-Type object */
static const value_string cops_report_type_vals[] = {
@ -219,6 +359,9 @@ static gint hf_cops_obj_len = -1;
static gint hf_cops_obj_c_num = -1;
static gint hf_cops_obj_c_type = -1;
static gint hf_cops_obj_s_num = -1;
static gint hf_cops_obj_s_type = -1;
static gint hf_cops_r_type_flags = -1;
static gint hf_cops_m_type_flags = -1;
@ -237,6 +380,12 @@ static gint hf_cops_dec_flags = -1;
static gint hf_cops_error = -1;
static gint hf_cops_error_sub = -1;
static gint hf_cops_gperror = -1;
static gint hf_cops_gperror_sub = -1;
static gint hf_cops_cperror = -1;
static gint hf_cops_cperror_sub = -1;
static gint hf_cops_katimer = -1;
static gint hf_cops_pepid = -1;
@ -258,22 +407,134 @@ static gint hf_cops_seq_num = -1;
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_gperror = -1;
static gint ett_cops_cperror = -1;
static gint ett_cops_pdp = -1;
void proto_reg_handoff_cops(void);
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 int dissect_cops_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *tree,
guint8 c_num, guint8 c_type, guint16 len);
static int 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)
static void
dissect_cops(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
int offset = 0;
int length_remaining;
guint32 msg_len;
int length;
tvbuff_t *next_tvb;
while (tvb_reported_length_remaining(tvb, offset) != 0) {
length_remaining = tvb_length_remaining(tvb, offset);
if (length_remaining == -1)
THROW(BoundsError);
/*
* Can we do reassembly?
*/
if (cops_desegment && pinfo->can_desegment) {
/*
* Yes - is the COPS header split across segment
* boundaries?
*/
if (length_remaining < 8) {
/*
* Yes. Tell the TCP dissector where
* the data for this message starts in
* the data it handed us, and how many
* more bytes we need, and return.
*/
pinfo->desegment_offset = offset;
pinfo->desegment_len = 8 - length_remaining;
return;
}
}
/*
* Get the length of the COPS message.
*/
msg_len = tvb_get_ntohl(tvb, offset + 4);
/*
* Can we do reassembly?
*/
if (cops_desegment && pinfo->can_desegment) {
/*
* Yes - is the DNS packet split across segment
* boundaries?
*/
if ((guint32)length_remaining < msg_len) {
/*
* Yes. Tell the TCP dissector where
* the data for this message starts in
* the data it handed us, and how many
* more bytes we need, and return.
*/
pinfo->desegment_offset = offset;
pinfo->desegment_len =
msg_len - length_remaining;
return;
}
}
/*
* Construct a tvbuff containing the amount of the payload
* we have available. Make its reported length the
* amount of data in the COPS packet.
*/
length = length_remaining;
if ((guint32)length > msg_len)
length = msg_len;
next_tvb = tvb_new_subset(tvb, offset, length, msg_len);
/*
* Dissect the COPS packet.
*
* Catch the ReportedBoundsError exception; if this
* particular message happens to get a ReportedBoundsError
* exception, that doesn't mean that we should stop
* dissecting COPS messages within this frame or chunk
* of reassembled data.
*
* If it gets a BoundsError, we can stop, as there's nothing
* more to see, so we just re-throw it.
*/
TRY {
dissect_cops_pdu(next_tvb, pinfo, tree);
}
CATCH(BoundsError) {
RETHROW;
}
CATCH(ReportedBoundsError) {
show_reported_bounds_error(tvb, pinfo, tree);
}
ENDTRY;
/*
* Skip the COPS packet.
*/
offset += msg_len;
}
}
static void
dissect_cops_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint8 op_code;
@ -290,11 +551,11 @@ static void dissect_cops(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
if (tree) {
proto_item *ti, *tv;
proto_tree *cops_tree, *ver_flags_tree;
guint32 offset, msg_len;
guint32 msg_len;
guint32 offset = 0;
guint8 ver_flags;
gint garbage;
offset = 0;
ti = proto_tree_add_item(tree, proto_cops, tvb, offset, -1, FALSE);
cops_tree = proto_item_add_subtree(ti, ett_cops);
@ -318,15 +579,8 @@ static void dissect_cops(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
proto_tree_add_uint(cops_tree, hf_cops_msg_len, tvb, offset, 4, tvb_get_ntohl(tvb, offset));
offset += 4;
while (msg_len >= COPS_OBJECT_HDR_SIZE) {
int consumed;
consumed = dissect_cops_object(tvb, offset, cops_tree);
if (consumed == 0)
break;
msg_len -= consumed;
offset += consumed;
}
while (tvb_reported_length_remaining(tvb, offset) >= COPS_OBJECT_HDR_SIZE)
offset += dissect_cops_object(tvb, offset, cops_tree);
garbage = tvb_length_remaining(tvb, offset);
if (garbage > 0)
@ -404,9 +658,6 @@ static int dissect_cops_object(tvbuff_t *tvb, guint32 offset, proto_tree *tree)
char *type_str;
int ret;
if (tvb_reported_length_remaining(tvb, offset) < COPS_OBJECT_HDR_SIZE)
return 0;
object_len = tvb_get_ntohs(tvb, offset);
c_num = tvb_get_guint8(tvb, offset + 2);
c_type = tvb_get_guint8(tvb, offset + 3);
@ -437,9 +688,61 @@ static int dissect_cops_object(tvbuff_t *tvb, guint32 offset, proto_tree *tree)
/* Pad to 32bit boundary */
if (object_len % sizeof (guint32))
object_len += (sizeof (guint32) - object_len % sizeof (guint32));
return object_len;
}
return object_len;
static int 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);
s_num = tvb_get_guint8(tvb, offset + 2);
s_type = tvb_get_guint8(tvb, offset + 3);
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, tvb_get_ntohs(tvb, offset));
offset += 2;
pr_len -= 2;
proto_tree_add_uint(obj_tree, hf_cops_obj_s_num, tvb, offset, 1, s_num);
offset++;
pr_len--;
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;
}
return 0;
}
static int dissect_cops_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *tree,
@ -514,19 +817,22 @@ static int dissect_cops_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *t
break;
case COPS_OBJ_DECISION:
case COPS_OBJ_LPDPDECISION:
if (c_type != 1)
break;
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",
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);
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);
dissect_cops_pr_objects(tvb, offset, ti, len);
} else
break;
return 0;
break;
case COPS_OBJ_ERROR:
@ -549,6 +855,17 @@ static int dissect_cops_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *t
return 0;
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);
dissect_cops_pr_objects(tvb, offset, ti, len);
return 0;
break;
case COPS_OBJ_KATIMER:
if (c_type != 1)
break;
@ -630,6 +947,7 @@ static int dissect_cops_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *t
return 0;
break;
default:
break;
}
@ -639,6 +957,365 @@ static int dissect_cops_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *t
return 0;
}
static gchar *
format_oid(subid_t *oid, guint oid_length)
{
char *result;
int result_len;
int len;
unsigned int i;
char *buf;
result_len = oid_length * 22;
result = g_malloc(result_len + 1);
buf = result;
len = sprintf(buf, "%lu", (unsigned long)oid[0]);
buf += len;
for (i = 1; i < oid_length;i++) {
len = sprintf(buf, ".%lu", (unsigned long)oid[i]);
buf += len;
}
return result;
}
static int decode_cops_pr_asn1_data(tvbuff_t *tvb, guint32 offset, proto_tree *tree, guint epdlen)
{
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 *variable_oid;
guint variable_oid_length;
gint32 vb_integer_value;
guint32 vb_uinteger_value;
guint8 *vb_octet_string;
subid_t *vb_oid;
guint vb_oid_length;
gchar *vb_display_string;
unsigned int i;
gchar *buf;
int len;
while (epdlen > 0){ /*while there is stuff to be decoded*/
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_SPRINT_VALUE
if (!unsafe) {
#if defined(HAVE_UCD_SNMP_SNMP_H)
value = vb_integer_value;
variable.val.integer = &value;
#elif defined(HAVE_SNMP_SNMP_H)
variable.val.integer = &vb_integer_value;
#endif
vb_display_string = format_var(&variable,
variable_oid, variable_oid_length, vb_type,
vb_length);
proto_tree_add_text(tree, asn1.tvb, offset,
length,
"Value: %s", vb_display_string);
g_free(vb_display_string);
break; /* we added formatted version to the tree */
}
#endif /* HAVE_SPRINT_VALUE */
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_SPRINT_VALUE
if (!unsafe) {
#if defined(HAVE_UCD_SNMP_SNMP_H)
value = vb_uinteger_value;
variable.val.integer = &value;
#elif defined(HAVE_SNMP_SNMP_H)
variable.val.integer = &vb_uinteger_value;
#endif
vb_display_string = format_var(&variable,
variable_oid, variable_oid_length, vb_type,
vb_length);
proto_tree_add_text(tree, asn1->tvb, offset,
length,
"Value: %s", vb_display_string);
g_free(vb_display_string);
break; /* we added formatted version to the tree */
}
#endif /* HAVE_SPRINT_VALUE */
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_SPRINT_VALUE
if (!unsafe) {
variable.val.string = vb_octet_string;
vb_display_string = format_var(&variable,
variable_oid, variable_oid_length, vb_type,
vb_length);
proto_tree_add_text(tree, asn1.tvb, offset,
length,
"Value: %s", vb_display_string);
g_free(vb_display_string);
break; /* we added formatted version to the tree */
}
#endif /* HAVE_SPRINT_VALUE */
/*
* If some characters are not printable, display
* the string as bytes.
*/
for (i = 0; i < vb_length; i++) {
if (!(isprint(vb_octet_string[i])
|| isspace(vb_octet_string[i])))
break;
}
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));
}
}
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) {
#ifdef HAVE_SPRINT_VALUE
if (!unsafe) {
variable.val.objid = vb_oid;
vb_display_string = format_var(&variable,
variable_oid, variable_oid_length, vb_type,
vb_length);
proto_tree_add_text(tree, asn1.tvb, offset,
length,
"Value: %s", vb_display_string);
break; /* we added formatted version to the tree */
}
#endif /* HAVE_SPRINT_VALUE */
vb_display_string = format_oid(vb_oid, vb_oid_length);
proto_tree_add_text(tree, asn1.tvb, offset, length,
"Value: %s: %s", vb_type_name, vb_display_string);
g_free(vb_display_string);
}
g_free(vb_oid);
break;
default:
g_assert_not_reached();
return ASN1_ERR_WRONG_TYPE;
}
asn1_close(&asn1,&offset);
epdlen -= length;
}
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 *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:");
decode_cops_pr_asn1_data(tvb, offset, ti, len);
return 0;
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:");
decode_cops_pr_asn1_data(tvb, offset, ti, len);
return 0;
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:");
decode_cops_pr_asn1_data(tvb, offset, ti, len);
return 0;
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);
return 0;
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);
return 0;
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:");
decode_cops_pr_asn1_data(tvb, offset, ti, len);
return 0;
break;
default:
break;
}
ti = proto_tree_add_text(tree, tvb, offset, len, "Contents: %u bytes", len);
return 0;
}
/* Register the protocol with Ethereal */
void proto_register_cops(void)
{
@ -690,6 +1367,18 @@ void proto_register_cops(void)
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,
@ -810,6 +1499,27 @@ void proto_register_cops(void)
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 */
@ -824,6 +1534,7 @@ void proto_register_cops(void)
&ett_cops_decision,
&ett_cops_error,
&ett_cops_pdp,
&ett_cops_pr_obj,
};
module_t* cops_module;
@ -845,6 +1556,10 @@ void proto_register_cops(void)
"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 spanning multiple TCP segments",
"Whether the COPS dissector should desegment all messages spanning multiple TCP segments",
&cops_desegment);
};
void