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/* packet-gsmtap-log.c
* Routines for GSMTAP logging packets
*
* (C) 2016 by Harald Welte <laforge@gnumonks.org>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include "packet-gsmtap.h"
void proto_register_gsmtap_log(void);
void proto_reg_handoff_gsmtap_log(void);
static dissector_handle_t gsmtap_log_handle;
static int proto_gsmtap_log = -1;
static int hf_log_ident = -1;
static int hf_log_subsys = -1;
static int hf_log_file_name = -1;
static int hf_log_file_line = -1;
static int hf_log_ts = -1;
static int hf_log_pid = -1;
static int hf_log_level = -1;
static int hf_log_string = -1;
static int ett_gsmtap_log = -1;
/* from libosmocore include/osmocom/core/logging.h */
static const value_string gsmtap_log_levels[] = {
{ 1, "DEBUG" },
{ 3, "INFO" },
{ 5, "NOTICE" },
{ 7, "ERROR" },
{ 8, "FATAL" },
{ 0, NULL }
};
/* dissect a GSMTAP header and hand payload off to respective dissector */
static int
dissect_gsmtap_log(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void * data _U_)
{
proto_item *ti;
proto_tree *log_tree;
gint offset = 0;
gint log_str_len;
guint log_pid, log_level, log_src_line;
const char *log_str;
const guint8 *log_ident, *log_subsys, *log_src_fname;
ti = proto_tree_add_item(tree, proto_gsmtap_log, tvb, 0, -1, ENC_NA);
log_tree = proto_item_add_subtree(ti, ett_gsmtap_log);
proto_tree_add_item(log_tree, hf_log_ts, tvb, offset, 8, ENC_TIME_SECS_USECS|ENC_BIG_ENDIAN);
offset += 8;
proto_tree_add_item_ret_string(log_tree, hf_log_ident, tvb, offset, 16, ENC_NA, pinfo->pool, &log_ident);
offset += 16;
proto_tree_add_item_ret_uint(log_tree, hf_log_pid, tvb, offset, 4, ENC_BIG_ENDIAN, &log_pid);
offset += 4;
proto_tree_add_item_ret_uint(log_tree, hf_log_level, tvb, offset++, 1, ENC_NA, &log_level);
offset += 3; /* pad octets */
proto_tree_add_item_ret_string(log_tree, hf_log_subsys, tvb, offset, 16, ENC_NA, pinfo->pool, &log_subsys);
offset += 16;
proto_tree_add_item_ret_string(log_tree, hf_log_file_name, tvb, offset, 32, ENC_NA, pinfo->pool, &log_src_fname);
offset += 32;
proto_tree_add_item_ret_uint(log_tree, hf_log_file_line, tvb, offset, 4, ENC_BIG_ENDIAN, &log_src_line);
offset += 4;
/* actual log message */
log_str_len = tvb_captured_length_remaining(tvb, offset);
proto_tree_add_item(log_tree, hf_log_string, tvb, offset, log_str_len, ENC_ASCII);
log_str = tvb_format_stringzpad_wsp(pinfo->pool, tvb, offset, log_str_len);
col_append_str(pinfo->cinfo, COL_INFO, log_str);
proto_item_append_text(ti, " %s(%u): %s/%d: %s:%u %s",
log_ident, log_pid, log_subsys, log_level,
log_src_fname, log_src_line, log_str);
return tvb_captured_length(tvb);
}
void
proto_register_gsmtap_log(void)
{
static hf_register_info hf[] = {
{ &hf_log_ident, { "Application", "gsmtap_log.ident",
FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL } },
{ &hf_log_subsys, { "Subsystem", "gsmtap_log.subsys",
FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL } },
{ &hf_log_file_name, { "Source File Name", "gsmtap_log.src_file.name",
FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL } },
{ &hf_log_file_line, { "Source File Line Number", "gsmtap_log.src_file.line_nr",
FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_log_ts, { "Timestamp", "gsmtap_log.timestamp",
FT_ABSOLUTE_TIME, ABSOLUTE_TIME_UTC, NULL, 0, NULL, HFILL } },
{ &hf_log_pid, { "Process ID", "gsmtap_log.pid",
FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_log_level, { "Log Level", "gsmtap_log.level",
FT_UINT8, BASE_DEC, VALS(gsmtap_log_levels), 0, NULL, HFILL } },
{ &hf_log_string, { "String", "gsmtap_log.string",
FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL } },
};
static gint *ett[] = {
&ett_gsmtap_log,
};
proto_gsmtap_log = proto_register_protocol("GSMTAP libosmocore logging", "GSMTAP-LOG", "gsmtap_log");
proto_register_field_array(proto_gsmtap_log, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
gsmtap_log_handle = register_dissector("gsmtap_log", dissect_gsmtap_log, proto_gsmtap_log);
}
void
proto_reg_handoff_gsmtap_log(void)
{
dissector_add_uint("gsmtap.type", GSMTAP_TYPE_OSMOCORE_LOG, gsmtap_log_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:
*/
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