osmocom/wireshark
14
0
Fork 1
Code Issues Pull requests Projects Releases Wiki Activity
wireshark/epan/dissectors/packet-k12.c
Guy Harris 659cf0527a UATs could be put into "categories". The categories were defined only 
implicitly by the #define name and string they were defined to; not all
UATs neatly fit into any of the categories, so some of them were put
into categories that weren't obviously correct for them, and one - the
display filter macro UAT - wasn't put into any category at all (which
caused crashes when editing them, as the GUI code that handled UAT
changes from a dialog assumed the category field was non-null).

The category was, in practice, used only to decide, in the
aforementioned GUI code, whether the packet summary pane needed to be
updated or not.  It also offered no option of "don't update the packet
summary pane *and* don't redissect anything", which is what would be
appropriate for the display filter macro UAT.

Replace the category with a set of fields indicating what the UAT
affects; we currently offer "dissection", which applies to most UATs
(any UAT in libwireshark presumably affects dissection at a minimum) and
"the set of named fields that exist".  Changing any UAT that affects
dissection requires a redissection; changing any UAT that affects the
set of named fields that exist requires a redissection *and* rebuilding
the packet summary pane.

Perhaps we also need "filtering", so that if you change a display filter
macro, we re-filter, in case the display is currently filtered with a
display filter that uses a macro that changed.

svn path=/trunk/; revision=43603
2012-07-08 01:00:46 +00:00

480 lines
14 KiB
C
Raw Blame History

/* packet-k12.c
* Helper-dissector for Tektronix k12xx-k15xx .rf5 file type
*
* Luis E. Garcia Ontanon <luis@ontanon.org>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <errno.h>
#include <glib.h>
#include <string.h>
#include <wsutil/str_util.h>
#include <epan/packet.h>
#include <epan/conversation.h>
#include <prefs.h>
#include <epan/report_err.h>
#include <epan/emem.h>
#include <epan/uat.h>
#include <epan/expert.h>
#include <epan/strutil.h>
#include "packet-sscop.h"
#include "packet-umts_fp.h"
typedef struct _k12_hdls_t {
char* match;
char* protos;
dissector_handle_t* handles;
} k12_handles_t;
static int proto_k12 = -1;
static int hf_k12_port_id = -1;
static int hf_k12_port_name = -1;
static int hf_k12_stack_file = -1;
static int hf_k12_port_type = -1;
static int hf_k12_atm_vp = -1;
static int hf_k12_atm_vc = -1;
static int hf_k12_atm_cid = -1;
static int hf_k12_ts = -1;
static gint ett_k12 = -1;
static gint ett_port = -1;
static gint ett_stack_item = -1;
static dissector_handle_t k12_handle;
static dissector_handle_t data_handle;
static dissector_handle_t sscop_handle;
static dissector_handle_t fp_handle;
extern int proto_sscop;
extern int proto_fp;
static emem_tree_t* port_handles = NULL;
static uat_t* k12_uat = NULL;
static k12_handles_t* k12_handles = NULL;
static guint nk12_handles = 0;
static const value_string k12_port_types[] = {
{ K12_PORT_DS1, "Ds1" },
{ K12_PORT_DS0S, "Ds0 Range" },
{ K12_PORT_ATMPVC, "ATM PVC" },
{ 0, NULL }
};
static void
fill_fp_info(fp_info *p_fp_info, guchar *extra_info, guint32 length)
{
guint adj = 0;
/* 0x11=control frame 0x30=data frame */
guint info_type = pntohs(extra_info);
/* 1=FDD, 2=TDD 3.84, 3=TDD 1.28 */
guchar radio_mode = extra_info[14];
guchar channel_type = 0;
guint i;
if (!p_fp_info || length < 22)
return;
/* Store division type */
p_fp_info->division = radio_mode;
/* Format used by K15, later fields are shifted by 8 bytes. */
if (pntohs(extra_info+2) == 5)
adj = 8;
p_fp_info->iface_type = IuB_Interface;
p_fp_info->release = 0; /* dummy */
p_fp_info->release_year = 0; /* dummy */
p_fp_info->release_month = 0; /* dummy */
/* 1=UL, 2=DL */
if (extra_info[15] == 1)
p_fp_info->is_uplink = 1;
else
p_fp_info->is_uplink = 0;
if (info_type == 0x11) /* control frame */
channel_type = extra_info[21 + adj];
else if (info_type == 0x30) /* data frame */
channel_type = extra_info[22 + adj];
switch (channel_type) {
case 1:
p_fp_info->channel = CHANNEL_BCH;
break;
case 2:
p_fp_info->channel = CHANNEL_PCH;
p_fp_info->paging_indications = 0; /* dummy */
break;
case 3:
p_fp_info->channel = CHANNEL_CPCH;
break;
case 4:
if (radio_mode == 1)
p_fp_info->channel = CHANNEL_RACH_FDD;
else if (radio_mode == 2)
p_fp_info->channel = CHANNEL_RACH_TDD;
else
p_fp_info->channel = CHANNEL_RACH_TDD_128;
break;
case 5:
if (radio_mode == 1)
p_fp_info->channel = CHANNEL_FACH_FDD;
else
p_fp_info->channel = CHANNEL_FACH_TDD;
break;
case 6:
if (radio_mode == 2)
p_fp_info->channel = CHANNEL_USCH_TDD_384;
else
p_fp_info->channel = CHANNEL_USCH_TDD_128;
break;
case 7:
if (radio_mode == 1)
p_fp_info->channel = CHANNEL_DSCH_FDD;
else
p_fp_info->channel = CHANNEL_DSCH_TDD;
break;
case 8:
p_fp_info->channel = CHANNEL_DCH;
break;
}
p_fp_info->dch_crc_present = 2; /* information not available */
if (info_type == 0x30) { /* data frame */
p_fp_info->num_chans = extra_info[23 + adj];
/* For each channel */
for (i = 0; i < (guint)p_fp_info->num_chans && (36+i*104+adj) <= length; ++i) {
/* Read TB size */
p_fp_info->chan_tf_size[i] = pntohl(extra_info+28+i*104+adj);
if (p_fp_info->chan_tf_size[i])
/* Work out number of TBs on this channel */
p_fp_info->chan_num_tbs[i] = pntohl(extra_info+32+i*104+adj)
/ p_fp_info->chan_tf_size[i];
}
}
}
static void
dissect_k12(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree)
{
static dissector_handle_t data_handles[] = {NULL,NULL};
proto_item* k12_item;
proto_tree* k12_tree;
proto_item* stack_item;
dissector_handle_t sub_handle = NULL;
dissector_handle_t* handles;
guint i;
k12_item = proto_tree_add_protocol_format(tree, proto_k12, tvb, 0, 0,
"Packet from: '%s' (0x%.8x)",
pinfo->pseudo_header->k12.input_name,
pinfo->pseudo_header->k12.input);
k12_tree = proto_item_add_subtree(k12_item, ett_k12);
proto_tree_add_uint(k12_tree, hf_k12_port_id, tvb, 0,0,pinfo->pseudo_header->k12.input);
proto_tree_add_string(k12_tree, hf_k12_port_name, tvb, 0,0,pinfo->pseudo_header->k12.input_name);
stack_item = proto_tree_add_string(k12_tree, hf_k12_stack_file, tvb, 0,0,pinfo->pseudo_header->k12.stack_file);
k12_item = proto_tree_add_uint(k12_tree, hf_k12_port_type, tvb, 0, 0,
pinfo->pseudo_header->k12.input_type);
k12_tree = proto_item_add_subtree(k12_item, ett_port);
switch ( pinfo->pseudo_header->k12.input_type ) {
case K12_PORT_DS0S:
proto_tree_add_uint(k12_tree, hf_k12_ts, tvb, 0,0,pinfo->pseudo_header->k12.input_info.ds0mask);
break;
case K12_PORT_ATMPVC:
{
gchar* circuit_str = ep_strdup_printf("%u:%u:%u",
(guint)pinfo->pseudo_header->k12.input_info.atm.vp,
(guint)pinfo->pseudo_header->k12.input_info.atm.vc,
(guint)pinfo->pseudo_header->k12.input_info.atm.cid);
/*
* XXX: this is prone to collisions!
* we need an uniform way to manage circuits between dissectors
*/
pinfo->circuit_id = g_str_hash(circuit_str);
proto_tree_add_uint(k12_tree, hf_k12_atm_vp, tvb, 0, 0,
pinfo->pseudo_header->k12.input_info.atm.vp);
proto_tree_add_uint(k12_tree, hf_k12_atm_vc, tvb, 0, 0,
pinfo->pseudo_header->k12.input_info.atm.vc);
if (pinfo->pseudo_header->k12.input_info.atm.cid)
proto_tree_add_uint(k12_tree, hf_k12_atm_cid, tvb, 0, 0,
pinfo->pseudo_header->k12.input_info.atm.cid);
break;
}
default:
break;
}
handles = se_tree_lookup32(port_handles, pinfo->pseudo_header->k12.input);
if (! handles ) {
for (i=0 ; i < nk12_handles; i++) {
if ( epan_strcasestr(pinfo->pseudo_header->k12.stack_file, k12_handles[i].match)
|| epan_strcasestr(pinfo->pseudo_header->k12.input_name, k12_handles[i].match) ) {
handles = k12_handles[i].handles;
break;
}
}
if (!handles) {
data_handles[0] = data_handle;
handles = data_handles;
}
se_tree_insert32(port_handles, pinfo->pseudo_header->k12.input, handles);
}
if (handles == data_handles) {
proto_tree* stack_tree = proto_item_add_subtree(stack_item,ett_stack_item);
proto_item* item;
item = proto_tree_add_text(stack_tree,tvb,0,0,
"Warning: stk file not matched in the 'K12 Protocols' table");
PROTO_ITEM_SET_GENERATED(item);
expert_add_info_format(pinfo, item, PI_UNDECODED, PI_WARN, "unmatched stk file");
item = proto_tree_add_text(stack_tree,tvb,0,0,
"Info: You can edit the 'K12 Protocols' table from Preferences->Protocols->k12xx");
PROTO_ITEM_SET_GENERATED(item);
call_dissector(data_handle, tvb, pinfo, tree);
return;
}
/* Setup subdissector information */
for (i = 0; handles[i] && handles[i+1]; ++i) {
if (handles[i] == sscop_handle) {
sscop_payload_info *p_sscop_info = p_get_proto_data(pinfo->fd, proto_sscop);
if (!p_sscop_info) {
p_sscop_info = se_alloc0(sizeof(sscop_payload_info));
p_add_proto_data(pinfo->fd, proto_sscop, p_sscop_info);
p_sscop_info->subdissector = handles[i+1];
}
}
/* Add more protocols here */
}
sub_handle = handles[0];
/* Setup information required by certain protocols */
if (sub_handle == fp_handle) {
fp_info *p_fp_info = p_get_proto_data(pinfo->fd, proto_fp);
if (!p_fp_info) {
p_fp_info = se_alloc0(sizeof(fp_info));
p_add_proto_data(pinfo->fd, proto_fp, p_fp_info);
fill_fp_info(p_fp_info,
pinfo->pseudo_header->k12.extra_info,
pinfo->pseudo_header->k12.extra_length);
}
}
call_dissector(sub_handle, tvb, pinfo, tree);
}
static void
k12_update_cb(void* r, const char** err)
{
k12_handles_t* h = r;
gchar** protos;
guint num_protos, i;
protos = ep_strsplit(h->protos,":",0);
for (num_protos = 0; protos[num_protos]; num_protos++)
g_strstrip(protos[num_protos]);
g_free(h->handles);
h->handles = g_malloc0(sizeof(dissector_handle_t)*(num_protos < 2 ? 2 : num_protos));
for (i = 0; i < num_protos; i++) {
if ( ! (h->handles[i] = find_dissector(protos[i])) ) {
h->handles[i] = data_handle;
*err = ep_strdup_printf("Could not find dissector for: '%s'",protos[i]);
return;
}
}
*err = NULL;
}
static void*
k12_copy_cb(void* dest, const void* orig, size_t len _U_)
{
k12_handles_t* d = dest;
const k12_handles_t* o = orig;
gchar** protos = ep_strsplit(d->protos,":",0);
guint num_protos;
for (num_protos = 0; protos[num_protos]; num_protos++)
g_strstrip(protos[num_protos]);
d->match = g_strdup(o->match);
d->protos = g_strdup(o->protos);
d->handles = g_memdup(o->handles,sizeof(dissector_handle_t)*(num_protos+1));
return dest;
}
static void
k12_free_cb(void* r)
{
k12_handles_t* h = r;
g_free(h->match);
g_free(h->protos);
g_free(h->handles);
}
static gboolean
protos_chk_cb(void* r _U_, const char* p, unsigned len, const void* u1 _U_, const void* u2 _U_, const char** err)
{
gchar** protos;
gchar* line = ep_strndup(p,len);
guint num_protos, i;
g_strstrip(line);
ascii_strdown_inplace(line);
protos = ep_strsplit(line,":",0);
for (num_protos = 0; protos[num_protos]; num_protos++)
g_strstrip(protos[num_protos]);
if (!num_protos) {
*err = ep_strdup_printf("No protocols given");
return FALSE;
}
for (i = 0; i < num_protos; i++) {
if (!find_dissector(protos[i])) {
*err = ep_strdup_printf("Could not find dissector for: '%s'",protos[i]);
return FALSE;
}
}
return TRUE;
}
UAT_CSTRING_CB_DEF(k12,match,k12_handles_t)
UAT_CSTRING_CB_DEF(k12,protos,k12_handles_t)
/* Make sure handles for various protocols are initialized */
static void
initialize_handles_once(void)
{
static gboolean initialized = FALSE;
if (!initialized) {
k12_handle = find_dissector("k12");
data_handle = find_dissector("data");
sscop_handle = find_dissector("sscop");
fp_handle = find_dissector("fp");
initialized = TRUE;
}
}
void proto_reg_handoff_k12(void)
{
initialize_handles_once();
dissector_add_uint("wtap_encap", WTAP_ENCAP_K12, k12_handle);
}
void
proto_register_k12(void)
{
static hf_register_info hf[] = {
{ &hf_k12_port_id, { "Port Id", "k12.port_id", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_k12_port_name, { "Port Name", "k12.port_name", FT_STRING, BASE_NONE, NULL, 0x0,NULL, HFILL }},
{ &hf_k12_stack_file, { "Stack file used", "k12.stack_file", FT_STRING, BASE_NONE, NULL, 0x0,NULL, HFILL }},
{ &hf_k12_port_type, { "Port type", "k12.input_type", FT_UINT32, BASE_HEX, VALS(k12_port_types), 0x0,NULL, HFILL }},
{ &hf_k12_ts, { "Timeslot mask", "k12.ds0.ts", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_k12_atm_vp, { "ATM VPI", "atm.vpi", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_k12_atm_vc, { "ATM VCI", "atm.vci", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_k12_atm_cid, { "AAL2 CID", "aal2.cid", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}
};
static gint *ett[] = {
&ett_k12,
&ett_port,
&ett_stack_item
};
static uat_field_t uat_k12_flds[] = {
UAT_FLD_CSTRING_ISPRINT(k12,match,"Match string",
"A string that will be matched (a=A) against an .stk filename or the name of a port.\n"
"The first match wins, the order of entries in the table is important!."),
UAT_FLD_CSTRING_OTHER(k12,protos,"Protocol",protos_chk_cb,
"The lowest layer protocol described by this .stk file (eg: mtp2).\n"
"Use (sscop:sscf-nni) for sscf-nni (MTP3b) with sscop"),
UAT_END_FIELDS
};
module_t *k12_module;
proto_k12 = proto_register_protocol("K12xx", "K12xx", "k12");
proto_register_field_array(proto_k12, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("k12", dissect_k12, proto_k12);
k12_uat = uat_new("K12 Protocols",
sizeof(k12_handles_t),
"k12_protos", /* filename */
TRUE, /* from_profile */
(void*) &k12_handles, /* data_ptr */
&nk12_handles, /* numitems_ptr */
UAT_AFFECTS_DISSECTION, /* affects dissection of packets, but not set of named fields */
"ChK12ProtocolsSection", /* help */
k12_copy_cb,
k12_update_cb,
k12_free_cb,
NULL,
uat_k12_flds);
k12_module = prefs_register_protocol(proto_k12, NULL);
prefs_register_obsolete_preference(k12_module, "config");
prefs_register_uat_preference(k12_module, "cfg",
"K12 Protocols",
"A table of matches vs stack filenames and relative protocols",
k12_uat);
port_handles = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "k12_port_handles");
}
Reference in a new issue View git blame Copy permalink