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