osmith
/
wireshark
forked from osmocom/wireshark
1
0
Fork 0
Code Pull Requests Releases Wiki Activity
wireshark/epan/dissectors/packet-k12.c

523 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>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/conversation.h>
#include <epan/prefs.h>
#include <epan/uat.h>
#include <epan/expert.h>
#include <epan/strutil.h>
#include <epan/proto_data.h>
#include <wiretap/wtap.h>
#include <wsutil/pint.h>
#include <wsutil/str_util.h>
#include "packet-sscop.h"
#include "packet-umts_fp.h"
void proto_reg_handoff_k12(void);
void proto_register_k12(void);
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 expert_field ei_k12_unmatched_stk_file = EI_INIT;
static expert_field ei_k12_unmatched_info = EI_INIT;
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 wmem_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 = pntoh16(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 = (enum division_type)radio_mode;
/* Format used by K15, later fields are shifted by 8 bytes. */
if (pntoh16(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] = pntoh32(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] = pntoh32(extra_info+32+i*104+adj)
/ p_fp_info->chan_tf_size[i];
}
}
}
static int
dissect_k12(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree, void* data _U_)
{
static dissector_handle_t data_handles[2] = {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 = wmem_strdup_printf(pinfo->pool, "%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
*/
conversation_create_endpoint_by_id(pinfo, ENDPOINT_NONE, g_str_hash(circuit_str), 0);
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 = (dissector_handle_t *)wmem_tree_lookup32(port_handles, pinfo->pseudo_header->k12.input);
if (! handles ) {
for (i=0 ; i < nk12_handles; i++) {
if ( ws_strcasestr(pinfo->pseudo_header->k12.stack_file, k12_handles[i].match)
|| ws_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;
}
wmem_tree_insert32(port_handles, pinfo->pseudo_header->k12.input, handles);
}
if (handles == data_handles) {
expert_add_info(pinfo, stack_item, &ei_k12_unmatched_stk_file);
expert_add_info(pinfo, stack_item, &ei_k12_unmatched_info);
call_dissector(data_handle, tvb, pinfo, tree);
return tvb_captured_length(tvb);
}
/* Setup subdissector information */
for (i = 0; handles[i] && handles[i+1]; ++i) {
if (handles[i] == sscop_handle) {
sscop_payload_info* p_sscop_info = (sscop_payload_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_sscop, 0);
if (!p_sscop_info) {
p_sscop_info = wmem_new0(wmem_file_scope(), sscop_payload_info);
p_add_proto_data(wmem_file_scope(), pinfo, proto_sscop, 0, 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 = (fp_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
if (!p_fp_info) {
p_fp_info = wmem_new0(wmem_file_scope(), fp_info);
p_add_proto_data(wmem_file_scope(), pinfo, proto_fp, 0, 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);
return tvb_captured_length(tvb);
}
static gboolean
k12_update_cb(void* r, char** err)
{
k12_handles_t* h = (k12_handles_t *)r;
gchar** protos;
guint num_protos, i;
protos = g_strsplit(h->protos,":",0);
for (num_protos = 0; protos[num_protos]; num_protos++)
g_strstrip(protos[num_protos]);
g_free(h->handles);
/* Allocate extra space for NULL marker */
h->handles = g_new0(dissector_handle_t, (num_protos+1));
for (i = 0; i < num_protos; i++) {
if ( ! (h->handles[i] = find_dissector(protos[i])) ) {
h->handles[i] = data_handle;
h->handles[i+1] = NULL;
*err = ws_strdup_printf("Could not find dissector for: '%s'",protos[i]);
g_strfreev(protos);
return FALSE;
}
}
h->handles[i] = NULL;
g_strfreev(protos);
*err = NULL;
return TRUE;
}
static void*
k12_copy_cb(void* dest, const void* orig, size_t len _U_)
{
k12_handles_t* d = (k12_handles_t *)dest;
const k12_handles_t* o = (const k12_handles_t *)orig;
gchar** protos = g_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 = (dissector_handle_t *)g_memdup2(o->handles,(guint)(sizeof(dissector_handle_t)*(num_protos+1)));
g_strfreev(protos);
return dest;
}
static void
k12_free_cb(void* r)
{
k12_handles_t* h = (k12_handles_t *)r;
g_free(h->match);
g_free(h->protos);
g_free(h->handles);
}
static gboolean
protos_chk_cb(void* r _U_, const char* p, guint len, const void* u1 _U_, const void* u2 _U_, char** err)
{
gchar** protos;
gchar* line = wmem_strndup(NULL,p,len);
guint num_protos, i;
g_strstrip(line);
ascii_strdown_inplace(line);
protos = g_strsplit(line,":",0);
for (num_protos = 0; protos[num_protos]; num_protos++)
g_strstrip(protos[num_protos]);
if (!num_protos) {
*err = g_strdup("No protocols given");
wmem_free(NULL, line);
g_strfreev(protos);
return FALSE;
}
for (i = 0; i < num_protos; i++) {
if (!find_dissector(protos[i])) {
*err = ws_strdup_printf("Could not find dissector for: '%s'",protos[i]);
wmem_free(NULL, line);
g_strfreev(protos);
return FALSE;
}
}
wmem_free(NULL, line);
g_strfreev(protos);
return TRUE;
}
UAT_CSTRING_CB_DEF(k12,match,k12_handles_t)
UAT_CSTRING_CB_DEF(k12,protos,k12_handles_t)
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
};
static ei_register_info ei[] = {
{ &ei_k12_unmatched_stk_file,
{ "k12.unmatched_stk_file", PI_UNDECODED, PI_WARN,
"Warning: stk file not matched in the 'K12 Protocols' table", EXPFILL }},
{ &ei_k12_unmatched_info,
{ "k12.unmatched_info", PI_PROTOCOL, PI_NOTE,
"You can edit the 'K12 Protocols' table from Preferences->Protocols->k12xx", EXPFILL }},
};
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;
expert_module_t* expert_k12;
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));
expert_k12 = expert_register_protocol(proto_k12);
expert_register_field_array(expert_k12, ei, array_length(ei));
k12_handle = register_dissector("k12", dissect_k12, proto_k12);
k12_uat = uat_new("K12 Protocols",
sizeof(k12_handles_t),
"k12_protos", /* filename */
TRUE, /* from_profile */
&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,
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 = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
}
void proto_reg_handoff_k12(void)
{
data_handle = find_dissector("data");
sscop_handle = find_dissector("sscop");
fp_handle = find_dissector("fp");
dissector_add_uint("wtap_encap", WTAP_ENCAP_K12, k12_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
View Git Blame Copy Permalink