Ethereal-dev: Re: [Ethereal-dev] Voip Calls analysis and Graph analysis
Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.
From: Alejandro Vaquero <alejandrovaquero@xxxxxxxxx>
Date: Sun, 06 Feb 2005 20:40:22 -0700
|
Hi All, Find attached a patch for "Voip analysis" to get the LRQ/LCF/LRJ messages included in the H323 calls for Gatekeeper to Gatekeeper configurations. Regards Alejandro Alejandro Vaquero wrote: Hi All, |
Index: tools/asn2eth.py
===================================================================
--- tools/asn2eth.py (revision 13312)
+++ tools/asn2eth.py (working copy)
@@ -2746,7 +2746,8 @@
if (ectx.OPer()):
body = ectx.eth_fn_call('dissect_per_restricted_character_string', ret='offset',
par=(('tvb', 'offset', 'pinfo', 'tree', 'hf_index'),
- (minv, maxv, alphabet, alphabet_length)))
+ (minv, maxv, alphabet, alphabet_length),
+ ('NULL', 'NULL')))
else:
body = '#error Can not decode %s' % (tname)
elif (ectx.NPer()):
Index: asn1/h225/packet-h225-template.c
===================================================================
--- asn1/h225/packet-h225-template.c (revision 13312)
+++ asn1/h225/packet-h225-template.c (working copy)
@@ -298,6 +298,8 @@
pi->h245_address = 0;
pi->h245_port = 0;
pi->frame_label[0] = '\0';
+ pi->dialedDigits[0] = '\0';
+ pi->is_destinationInfo = FALSE;
}
/*
Index: asn1/h225/packet-h225-template.h
===================================================================
--- asn1/h225/packet-h225-template.h (revision 13312)
+++ asn1/h225/packet-h225-template.h (working copy)
@@ -65,6 +65,8 @@
gboolean is_h245Tunneling;
guint32 h245_address;
guint16 h245_port;
+ gchar dialedDigits[64]; /* Dialed Digits in the LRQ and LCF used for voip analysis */
+ gboolean is_destinationInfo;
gchar frame_label[50]; /* the Fram label used by graph_analysis, what is a abreviation of cinfo */
} h225_packet_info;
Index: asn1/h225/h225.cnf
===================================================================
--- asn1/h225/h225.cnf (revision 13312)
+++ asn1/h225/h225.cnf (working copy)
@@ -203,16 +203,25 @@
h225_pi->msg_tag = rasmessage_value;
#.END
#----------------------------------------------------------------------------------------
+#.FN_HDR DestinationInfo/_item
+
+ h225_pi->is_destinationInfo = TRUE;
+#.END
+#----------------------------------------------------------------------------------------
# TODO asn2eth can't handle restriced string ?
#.FN_BODY DialedDigits
-
- offset=dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, 1, 128, "#,*0123456789", 13);
+ if (h225_pi->is_destinationInfo == TRUE) {
+ offset = dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, 1, 128, "#,*0123456789", 13, (char *)&h225_pi->dialedDigits , 64);
+ h225_pi->is_destinationInfo = FALSE;
+ }
+ else
+ offset = dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, 1, 128, "#,*0123456789", 13, NULL, NULL);
#.END
#----------------------------------------------------------------------------------------
# TODO asn2eth can't handle restriced string ?
#.FN_BODY NumberDigits
- offset=dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, 1, 128, "#,*0123456789", 13);
+ offset=dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, 1, 128, "#,*0123456789", 13, NULL, NULL);
#.END
#----------------------------------------------------------------------------------------
#.FN_BODY H245TransportAddress/h245ipAddress/h245ipv4
Index: gtk/voip_calls_dlg.c
===================================================================
--- gtk/voip_calls_dlg.c (revision 13312)
+++ gtk/voip_calls_dlg.c (working copy)
@@ -154,7 +154,7 @@
/* Update the status label with the number of total messages */
g_snprintf(label_text, 256,
"Total: Calls: %d Start packets: %d Completed calls: %d Rejected calls: %d",
- voip_calls_get_info()->ncalls,
+ g_list_length(voip_calls_get_info()->strinfo_list),
voip_calls_get_info()->start_packets,
voip_calls_get_info()->completed_calls,
voip_calls_get_info()->rejected_calls);
@@ -604,19 +604,20 @@
void voip_calls_dlg_update(GList *list)
{
gchar label_text[256];
-
+guint foo;
if (voip_calls_dlg != NULL) {
gtk_clist_clear(GTK_CLIST(clist));
calls_nb = 0;
calls_ns = 0;
g_snprintf(label_text, 256,
"Total: Calls: %d Start packets: %d Completed calls: %d Rejected calls: %d",
- voip_calls_get_info()->ncalls,
+ g_list_length(voip_calls_get_info()->strinfo_list),
voip_calls_get_info()->start_packets,
voip_calls_get_info()->completed_calls,
voip_calls_get_info()->rejected_calls);
gtk_label_set(GTK_LABEL(status_label), label_text);
+ foo= g_list_length(list);
list = g_list_first(list);
while (list)
{
Index: gtk/voip_calls.c
===================================================================
--- gtk/voip_calls.c (revision 13312)
+++ gtk/voip_calls.c (working copy)
@@ -174,81 +174,6 @@
}
/****************************************************************************/
-/* Add the RTP streams into the graph data */
-/**
- * TODO:
- * - reimplement this function
- * This function does not work with VoIP taps
- * which keep the window up to date.
- * Either make rtp_stream() work without redissection or
- * add an additional tap listener for rtp to this file.
- * The second solution is cleaner and probably easier to implement,
- * leaving the current rtp analysis feature untouched.
- */
-void add_rtp_streams_graph(void)
-{
- rtp_stream_info_t *strinfo;
- GList *strinfo_list;
- guint nfound;
- guint item;
- GList* voip_calls_graph_list;
- graph_analysis_item_t *gai;
- graph_analysis_item_t *new_gai;
- guint16 conv_num;
- guint32 duration;
-
- /* Scan for rtpstream */
- rtpstream_scan();
-
- /* assigne the RTP streams to calls */
- nfound = 0;
- strinfo_list = g_list_first(rtpstream_get_info()->strinfo_list);
- while (strinfo_list)
- {
- strinfo = (rtp_stream_info_t*)(strinfo_list->data);
-
- /* look in the voip calls graph list if there is a match for this RTP stream */
- voip_calls_graph_list = g_list_first(the_tapinfo_struct.graph_analysis->list);
- item = 0;
- while (voip_calls_graph_list)
- {
- gai = voip_calls_graph_list->data;
- conv_num = gai->conv_num;
- if (strinfo->setup_frame_number == gai->frame_num){
- while(voip_calls_graph_list){
- gai = voip_calls_graph_list->data;
- /* add the RTP item to the graph */
- if (strinfo->first_frame_num<gai->frame_num){
- new_gai = g_malloc(sizeof(graph_analysis_item_t));
- new_gai->frame_num = strinfo->first_frame_num;
- new_gai->time = (double)strinfo->start_rel_sec + (double)strinfo->start_rel_usec/1000000;
- g_memmove(&new_gai->ip_src, strinfo->src_addr.data, 4);
- g_memmove(&new_gai->ip_dst, strinfo->dest_addr.data, 4);
- new_gai->port_src = strinfo->src_port;
- new_gai->port_dst = strinfo->dest_port;
- duration = (strinfo->stop_rel_sec*1000000 + strinfo->stop_rel_usec) - (strinfo->start_rel_sec*1000000 + strinfo->start_rel_usec);
- new_gai->frame_label = g_strdup_printf("RTP (%s)", val_to_str(strinfo->pt, rtp_payload_type_short_vals, "%u"));
- new_gai->comment = g_strdup_printf("RTP Num packets:%d Duration:%d.%03ds ssrc:%d", strinfo->npackets, duration/1000000,(duration%1000000)/1000, strinfo->ssrc);
- new_gai->conv_num = conv_num;
- new_gai->display=FALSE;
- new_gai->line_style = 2; /* the arrow line will be 2 pixels width */
- the_tapinfo_struct.graph_analysis->list = g_list_insert(the_tapinfo_struct.graph_analysis->list, new_gai, item);
-
- break;
- }
- voip_calls_graph_list = g_list_next(voip_calls_graph_list);
- item++;
- }
- break;
- }
- voip_calls_graph_list = g_list_next(voip_calls_graph_list);
- item++;
- }
- strinfo_list = g_list_next(strinfo_list);
- }
-}
-
-/****************************************************************************/
/* Add a new item into the graph */
int add_to_graph(voip_calls_tapinfo_t *tapinfo _U_, packet_info *pinfo, gchar *frame_label, gchar *comment, guint16 call_num)
{
@@ -318,6 +243,28 @@
}
/****************************************************************************/
+/* Change all the graph items with call_num to new_call_num */
+guint change_call_num_graph(voip_calls_tapinfo_t *tapinfo _U_, guint16 call_num, guint16 new_call_num)
+{
+ graph_analysis_item_t *gai;
+ GList* list;
+ guint items_changed;
+
+ items_changed = 0;
+ list = g_list_first(tapinfo->graph_analysis->list);
+ while (list)
+ {
+ gai = list->data;
+ if (gai->conv_num == call_num){
+ gai->conv_num = new_call_num;
+ items_changed++;
+ }
+ list = g_list_next (list);
+ }
+ return items_changed;
+}
+
+/****************************************************************************/
/* ***************************TAP for RTP **********************************/
/****************************************************************************/
@@ -1085,15 +1032,17 @@
voip_calls_info_t *tmp_listinfo;
voip_calls_info_t *strinfo = NULL;
h323_calls_info_t *tmp_h323info;
+ h323_calls_info_t *tmp2_h323info;
gchar *frame_label;
gchar *comment;
GList* list;
guint32 tmp_src, tmp_dst;
+ guint foo;
const h225_packet_info *pi = H225info;
- /* if not guid and RAS return because did not belong to a call */
- if ((memcmp(pi->guid, guid_allzero, GUID_LEN) == 0) && (pi->msg_type == H225_RAS))
+ /* if not guid and RAS and not LRQ, LCF or LRJ return because did not belong to a call */
+ if ((memcmp(pi->guid, guid_allzero, GUID_LEN) == 0) && (pi->msg_type == H225_RAS) && ((pi->msg_tag < 18) || (pi->msg_tag > 20)))
return 0;
@@ -1113,6 +1062,24 @@
list = g_list_next (list);
}
if (strinfo==NULL) return 0;
+ } else if ( (pi->msg_type == H225_RAS) && ((pi->msg_tag == 19) || (pi->msg_tag == 20))) { /* RAS LCF or LRJ*/
+ /* if the LCF/LRJ doesn't match to a LRQ, just return */
+ if (!pi->request_available) return 0;
+
+ /* check wether we already have a call with this request SeqNum */
+ list = g_list_first(tapinfo->strinfo_list);
+ while (list)
+ {
+ tmp_listinfo=list->data;
+ if (tmp_listinfo->protocol == VOIP_H323){
+ tmp_h323info = tmp_listinfo->prot_info;
+ if (tmp_h323info->requestSeqNum == pi->requestSeqNum) {
+ strinfo = (voip_calls_info_t*)(list->data);
+ break;
+ }
+ }
+ list = g_list_next (list);
+ }
} else {
/* check wether we already have a call with this guid in the list */
list = g_list_first(tapinfo->strinfo_list);
@@ -1121,7 +1088,7 @@
tmp_listinfo=list->data;
if (tmp_listinfo->protocol == VOIP_H323){
tmp_h323info = tmp_listinfo->prot_info;
- if (memcmp(tmp_h323info->guid, pi->guid,GUID_LEN)==0){
+ if ( (memcmp(tmp_h323info->guid, guid_allzero, GUID_LEN) != 0) && (memcmp(tmp_h323info->guid, pi->guid,GUID_LEN)==0) ){
strinfo = (voip_calls_info_t*)(list->data);
break;
}
@@ -1155,6 +1122,7 @@
tmp_h323info->is_h245 = FALSE;
tmp_h323info->q931_crv = -1;
tmp_h323info->q931_crv2 = -1;
+ tmp_h323info->requestSeqNum = 0;
strinfo->call_num = tapinfo->ncalls++;
strinfo->npackets = 0;
@@ -1194,7 +1162,6 @@
switch(pi->cs_type){
case H225_SETUP:
tmp_h323info->is_faststart_Setup = pi->is_faststart;
-
/* set te calling and called number from the Q931 packet */
if (q931_frame_num == pinfo->fd->num){
if (q931_calling_number != NULL){
@@ -1206,6 +1173,39 @@
strinfo->to_identity=g_strdup(q931_called_number);
}
}
+ /* check if there is an LRQ/LCF that match this Setup */
+ /* TODO: we are just checking the DialedNumer in LRQ/LCF agains the Setup
+ we should also check if the h225 signaling IP and port match the destination
+ Setup ip and port */
+ list = g_list_first(tapinfo->strinfo_list);
+ foo= g_list_length(list);
+ while (list)
+ {
+ tmp_listinfo=list->data;
+ if (tmp_listinfo->protocol == VOIP_H323){
+ tmp2_h323info = tmp_listinfo->prot_info;
+
+ /* check if there called number match a LRQ/LCF */
+ if ( (strcmp(strinfo->to_identity, tmp_listinfo->to_identity)==0)
+ && (memcmp(tmp2_h323info->guid, guid_allzero, GUID_LEN) == 0) ){
+ /* change the call graph to the LRQ/LCF to belong to this call */
+ strinfo->npackets += change_call_num_graph(tapinfo, tmp_listinfo->call_num, strinfo->call_num);
+
+ /* remove this LRQ/LCF call entry because we have found the Setup that match them */
+ g_free(tmp_listinfo->from_identity);
+ g_free(tmp_listinfo->to_identity);
+ g_free(tmp2_h323info->guid);
+ g_list_free(tmp2_h323info->h245_list);
+ tmp2_h323info->h245_list = NULL;
+ g_free(tmp_listinfo->prot_info);
+ tapinfo->strinfo_list = g_list_remove(tapinfo->strinfo_list, tmp_listinfo);
+ break;
+ }
+ }
+ list = g_list_next (list);
+ }
+ foo= g_list_length(list);
+ /* Set the Setup address if it was not set */
if (tmp_h323info->h225SetupAddr == 0) g_memmove(&(tmp_h323info->h225SetupAddr), pinfo->src.data,4);
strinfo->call_state=VOIP_CALL_SETUP;
comment = g_strdup_printf("H225 From: %s To:%s TunnH245:%s FS:%s", strinfo->from_identity, strinfo->to_identity, (tmp_h323info->is_h245Tunneling==TRUE?"on":"off"),
@@ -1253,8 +1253,23 @@
}
} else if (pi->msg_type == H225_RAS){
+ switch(pi->msg_tag){
+ case 18: /* LRQ */
+ if (!pi->is_duplicate){
+ g_free(strinfo->to_identity);
+ strinfo->to_identity=g_strdup(pi->dialedDigits);
+ tmp_h323info->requestSeqNum = pi->requestSeqNum;
+ }
+ case 19: /* LCF */
+ if (strlen(pi->dialedDigits))
+ comment = g_strdup_printf("H225 RAS dialedDigits: %s", pi->dialedDigits);
+ else
+ comment = g_strdup("H225 RAS");
+ break;
+ default:
+ comment = g_strdup("H225 RAS");
+ }
frame_label = g_strdup_printf("%s", val_to_str(pi->msg_tag, RasMessage_vals, "<unknown>"));
- comment = g_strdup("H225 RAS");
} else {
frame_label = g_strdup("H225: Unknown");
comment = g_strdup("");
Index: gtk/voip_calls.h
===================================================================
--- gtk/voip_calls.h (revision 13312)
+++ gtk/voip_calls.h (working copy)
@@ -104,6 +104,7 @@
gboolean is_h245Tunneling;
gint32 q931_crv;
gint32 q931_crv2;
+ guint requestSeqNum;
} h323_calls_info_t;
/* defines a voip call */
@@ -128,7 +129,7 @@
/* struct holding all information of the tap */
typedef struct _voip_calls_tapinfo {
- int ncalls; /* number of calls in the list */
+ int ncalls; /* number of call */
GList* strinfo_list; /* list with all calls */
int npackets; /* total number of packets of all calls */
voip_calls_info_t* filter_calls_fwd; /* used as filter in some tap modes */
Index: plugins/plugin_api_list.c
===================================================================
--- plugins/plugin_api_list.c (revision 13312)
+++ plugins/plugin_api_list.c (working copy)
@@ -377,7 +377,7 @@
guint32 dissect_per_choice(tvbuff_t*, guint32, packet_info*, proto_tree*, int, gint, const per_choice_t*, char*, guint32*);
guint32 dissect_per_sequence(tvbuff_t*, guint32, packet_info*, proto_tree *parent_tree, int, gint, const per_sequence_t*);
guint32 dissect_per_octet_string(tvbuff_t*, guint32, packet_info*, proto_tree*, int, int, int, guint32*, guint32*);
-guint32 dissect_per_restricted_character_string(tvbuff_t*, guint32, packet_info*, proto_tree*, int, int, int, char*, int);
+guint32 dissect_per_restricted_character_string(tvbuff_t*, guint32, packet_info*, proto_tree*, int, int, int, char*, int, char *, guint32);
void dissector_add_string(const char*, gchar*, dissector_handle_t);
void dissector_delete_string(const char*, const gchar*, dissector_handle_t);
Index: plugins/Xplugin_table.h
===================================================================
--- plugins/Xplugin_table.h (revision 13312)
+++ plugins/Xplugin_table.h (working copy)
@@ -232,7 +232,7 @@
typedef guint32 (*addr_dissect_per_choice) (tvbuff_t *, guint32, packet_info *, proto_tree *, int, gint, const per_choice_t *, char *, guint32 *);
typedef guint32 (*addr_dissect_per_sequence) (tvbuff_t *, guint32, packet_info *, proto_tree *, int, gint, const per_sequence_t *);
typedef guint32 (*addr_dissect_per_octet_string) (tvbuff_t *, guint32, packet_info *, proto_tree *, int, int, int, guint32 *, guint32 *);
-typedef guint32 (*addr_dissect_per_restricted_character_string) (tvbuff_t *, guint32, packet_info *, proto_tree *, int, int, int, char *, int);
+typedef guint32 (*addr_dissect_per_restricted_character_string) (tvbuff_t *, guint32, packet_info *, proto_tree *, int, int, int, char *, int, char *, guint32);
typedef void (*addr_dissector_add_string) (const char *, gchar *, dissector_handle_t);
typedef void (*addr_dissector_delete_string) (const char *, const gchar *, dissector_handle_t);
typedef void (*addr_dissector_change_string) (const char *, gchar *, dissector_handle_t);
Index: epan/dissectors/packet-h225.c
===================================================================
--- epan/dissectors/packet-h225.c (revision 13312)
+++ epan/dissectors/packet-h225.c (working copy)
@@ -744,7 +744,7 @@
static int hf_h225_gatewayDataRate = -1; /* DataRate */
static int hf_h225_desiredTunnelledProtocol = -1; /* TunnelledProtocol */
static int hf_h225_canMapSrcAlias = -1; /* BOOLEAN */
-static int hf_h225_DestinationInfo_item = -1; /* AliasAddress */
+static int hf_h225_DestinationInfo_item = -1; /* DestinationInfo_item */
static int hf_h225_pointToPoint = -1; /* NULL */
static int hf_h225_oneToN = -1; /* NULL */
static int hf_h225_nToOne = -1; /* NULL */
@@ -2232,9 +2232,13 @@
static int
dissect_h225_DialedDigits(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree, int hf_index) {
+ if (h225_pi->is_destinationInfo == TRUE) {
+ offset = dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, 1, 128, "#,*0123456789", 13, (char *)&h225_pi->dialedDigits , 64);
+ h225_pi->is_destinationInfo = FALSE;
+ }
+ else
+ offset = dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, 1, 128, "#,*0123456789", 13, NULL, NULL);
- offset=dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, 1, 128, "#,*0123456789", 13);
-
return offset;
}
static int dissect_dialedDigits(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree) {
@@ -2515,7 +2519,7 @@
static int
dissect_h225_NumberDigits(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree, int hf_index) {
- offset=dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, 1, 128, "#,*0123456789", 13);
+ offset=dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, 1, 128, "#,*0123456789", 13, NULL, NULL);
return offset;
}
@@ -2649,7 +2653,8 @@
static int
dissect_h225_TBCD_STRING(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree, int hf_index) {
offset = dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index,
- -1, -1, "0123456789#*abc", strlen("0123456789#*abc"));
+ -1, -1, "0123456789#*abc", strlen("0123456789#*abc"),
+ NULL, NULL);
return offset;
}
@@ -2914,9 +2919,6 @@
static int dissect_srcInfo_item(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree) {
return dissect_h225_AliasAddress(tvb, offset, pinfo, tree, hf_h225_srcInfo_item);
}
-static int dissect_DestinationInfo_item(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree) {
- return dissect_h225_AliasAddress(tvb, offset, pinfo, tree, hf_h225_DestinationInfo_item);
-}
static int dissect_modifiedSrcInfo_item(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree) {
return dissect_h225_AliasAddress(tvb, offset, pinfo, tree, hf_h225_modifiedSrcInfo_item);
}
@@ -7584,6 +7586,19 @@
static int
+dissect_h225_DestinationInfo_item(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree, int hf_index) {
+
+ h225_pi->is_destinationInfo = TRUE;
+ offset = dissect_h225_AliasAddress(tvb, offset, pinfo, tree, hf_index);
+
+ return offset;
+}
+static int dissect_DestinationInfo_item(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree) {
+ return dissect_h225_DestinationInfo_item(tvb, offset, pinfo, tree, hf_h225_DestinationInfo_item);
+}
+
+
+static int
dissect_h225_DestinationInfo(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree, int hf_index) {
offset = dissect_per_sequence_of(tvb, offset, pinfo, tree, hf_index,
ett_h225_DestinationInfo, dissect_DestinationInfo_item);
@@ -12274,6 +12289,8 @@
pi->h245_address = 0;
pi->h245_port = 0;
pi->frame_label[0] = '\0';
+ pi->dialedDigits[0] = '\0';
+ pi->is_destinationInfo = FALSE;
}
/*
Index: epan/dissectors/packet-h225.h
===================================================================
--- epan/dissectors/packet-h225.h (revision 13312)
+++ epan/dissectors/packet-h225.h (working copy)
@@ -1,6 +1,6 @@
/* Do not modify this file. */
/* It is created automatically by the ASN.1 to Ethereal dissector compiler */
-/* .\packet-h225.h */
+/* ./packet-h225.h */
/* ../../tools/asn2eth.py -X -e -p h225 -c h225.cnf -s packet-h225-template h225.asn */
/* Input file: packet-h225-template.h */
@@ -72,6 +72,8 @@
gboolean is_h245Tunneling;
guint32 h245_address;
guint16 h245_port;
+ gchar dialedDigits[64]; /* Dialed Digits in the LRQ and LCF used for voip analysis */
+ gboolean is_destinationInfo;
gchar frame_label[50]; /* the Fram label used by graph_analysis, what is a abreviation of cinfo */
} h225_packet_info;
Index: epan/dissectors/packet-per.c
===================================================================
--- epan/dissectors/packet-per.c (revision 13312)
+++ epan/dissectors/packet-per.c (working copy)
@@ -269,7 +269,7 @@
/* XXX we dont do >64k length strings yet */
guint32
-dissect_per_restricted_character_string(tvbuff_t *tvb, guint32 offset, packet_info *pinfo, proto_tree *tree, int hf_index, int min_len, int max_len, char *alphabet, int alphabet_length)
+dissect_per_restricted_character_string(tvbuff_t *tvb, guint32 offset, packet_info *pinfo, proto_tree *tree, int hf_index, int min_len, int max_len, char *alphabet, int alphabet_length, char *info_str, guint32 info_str_len)
{
guint32 length;
gboolean byte_aligned;
@@ -282,6 +282,9 @@
/* xx.x if the length is 0 bytes there will be no encoding */
if(max_len==0){
+ if (info_str != NULL) {
+ info_str[0] = '\0';
+ }
return offset;
}
@@ -397,27 +400,30 @@
}
str[char_pos]=0;
proto_tree_add_string(tree, hf_index, tvb, (old_offset>>3), (offset>>3)-(old_offset>>3), str);
-
+ if (info_str != NULL) {
+ if (info_str_len<length) str[info_str_len-1] = '\0';
+ strcpy(info_str, str);
+ }
return offset;
}
guint32
dissect_per_NumericString(tvbuff_t *tvb, guint32 offset, packet_info *pinfo, proto_tree *tree, int hf_index, int min_len, int max_len)
{
- offset=dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, min_len, max_len, " 0123456789", 11);
+ offset=dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, min_len, max_len, " 0123456789", 11, NULL, NULL);
return offset;
}
guint32
dissect_per_PrintableString(tvbuff_t *tvb, guint32 offset, packet_info *pinfo, proto_tree *tree, int hf_index, int min_len, int max_len)
{
- offset=dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, min_len, max_len, " '()+,-.*0123456789:=?ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", 74);
+ offset=dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, min_len, max_len, " '()+,-.*0123456789:=?ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", 74, NULL, NULL);
return offset;
}
guint32
dissect_per_VisibleString(tvbuff_t *tvb, guint32 offset, packet_info *pinfo, proto_tree *tree, int hf_index, int min_len, int max_len)
{
offset=dissect_per_restricted_character_string(tvb, offset, pinfo, tree, hf_index, min_len, max_len,
- " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~", 95);
+ " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~", 95, NULL, NULL);
return offset;
}
guint32
Index: epan/dissectors/packet-per.h
===================================================================
--- epan/dissectors/packet-per.h (revision 13312)
+++ epan/dissectors/packet-per.h (working copy)
@@ -100,6 +100,6 @@
extern guint32 dissect_per_bit_string(tvbuff_t *tvb, guint32 offset, packet_info *pinfo, proto_tree *tree, int hf_index, int min_len, int max_len);
-extern guint32 dissect_per_restricted_character_string(tvbuff_t *tvb, guint32 offset, packet_info *pinfo, proto_tree *tree, int hf_index, int min_len, int max_len, char *alphabet, int alphabet_length);
+extern guint32 dissect_per_restricted_character_string(tvbuff_t *tvb, guint32 offset, packet_info *pinfo, proto_tree *tree, int hf_index, int min_len, int max_len, char *alphabet, int alphabet_length, char *info_str, guint32 info_str_len);
#endif /* __PACKET_PER_H__ */
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