diff options
| -rw-r--r-- | Makefile.am | 3 | ||||
| -rw-r--r-- | packet-syslog.c | 262 |
2 files changed, 264 insertions, 1 deletions
diff --git a/Makefile.am b/Makefile.am index 4e967f4f2e..2ed7efcc7a 100644 --- a/Makefile.am +++ b/Makefile.am @@ -1,7 +1,7 @@ # Makefile.am # Automake file for Ethereal # -# $Id: Makefile.am,v 1.203 2000/06/07 22:57:43 gram Exp $ +# $Id: Makefile.am,v 1.204 2000/06/11 05:19:21 gerald Exp $ # # Ethereal - Network traffic analyzer # By Gerald Combs <gerald@zing.org> @@ -136,6 +136,7 @@ DISSECTOR_SOURCES = \ packet-srvloc.c \ packet-sscop.c \ packet-stat.c \ + packet-syslog.c \ packet-tacacs.c \ packet-tcp.c \ packet-telnet.c\ diff --git a/packet-syslog.c b/packet-syslog.c new file mode 100644 index 0000000000..4aea09ac09 --- /dev/null +++ b/packet-syslog.c @@ -0,0 +1,262 @@ +/* packet-syslog.c + * Routines for syslog message dissection + * + * Copyright 2000, Gerald Combs <gerald@zing.org> + * + * $Id: packet-syslog.c,v 1.1 2000/06/11 05:19:20 gerald Exp $ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@zing.org> + * Copyright 1998 Gerald Combs + * + * + * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> + +#include <string.h> +#include <glib.h> +#include "packet.h" + +#define UDP_PORT_SYSLOG 514 + +#define PRIORITY_MASK 0x0007 /* 0000 0111 */ +#define FACILITY_MASK 0x03f8 /* 1111 1000 */ + +/* On my RH 6.2 box, memcpy overwrites nearby chunks of memory if this is + a multiple of four. */ +#define COL_INFO_LEN 35 +#define ELLIPSIS "..." /* ISO 8859-1 doesn't appear to have a real ellipsis. */ +#define ELL_LEN ((COL_INFO_LEN - strlen(ELLIPSIS)) - 1) + +static const value_string short_pri[] = { + { 0, "EMERG" }, + { 1, "ALERT" }, + { 2, "CRIT" }, + { 3, "ERR" }, + { 4, "WARNING" }, + { 5, "NOTICE" }, + { 6, "INFO" }, + { 7, "DEBUG" }, + { 0, NULL }, +}; + +static const value_string short_fac[] = { + { 0, "KERN" }, + { 1, "USER" }, + { 2, "MAIL" }, + { 3, "DAEMON" }, + { 4, "AUTH" }, + { 5, "SYSLOG" }, + { 6, "LPR" }, + { 7, "NEWS" }, + { 8, "UUCP" }, + { 9, "CRON" }, + { 10, "AUTHPRIV" }, + { 11, "FTP" }, + { 16, "LOCAL0" }, + { 17, "LOCAL1" }, + { 18, "LOCAL2" }, + { 19, "LOCAL3" }, + { 20, "LOCAL4" }, + { 21, "LOCAL5" }, + { 22, "LOCAL6" }, + { 23, "LOCAL7" }, + { 0, NULL }, +}; + +static const value_string long_pri[] = { + { 0, "EMERG - system is unusable" }, + { 1, "ALERT - action must be taken immediately" }, + { 2, "CRIT - critical conditions" }, + { 3, "ERR - error conditions" }, + { 4, "WARNING - warning conditions" }, + { 5, "NOTICE - normal but significant condition" }, + { 6, "INFO - informational" }, + { 7, "DEBUG - debug-level messages" }, + { 0, NULL }, +}; + +static const value_string long_fac[] = { + { 0, "KERN - kernel messages" }, + { 1, "USER - random user-level messages" }, + { 2, "MAIL - mail system" }, + { 3, "DAEMON - system daemons" }, + { 4, "AUTH - security/authorization messages" }, + { 5, "SYSLOG - messages generated internally by syslogd" }, + { 6, "LPR - line printer subsystem" }, + { 7, "NEWS - network news subsystem" }, + { 8, "UUCP - UUCP subsystem" }, + { 9, "CRON - clock daemon" }, + { 10, "AUTHPRIV - security/authorization messages (private)" }, + { 11, "FTP - ftp daemon" }, + { 16, "LOCAL0 - reserved for local use" }, + { 17, "LOCAL1 - reserved for local use" }, + { 18, "LOCAL2 - reserved for local use" }, + { 19, "LOCAL3 - reserved for local use" }, + { 20, "LOCAL4 - reserved for local use" }, + { 21, "LOCAL5 - reserved for local use" }, + { 22, "LOCAL6 - reserved for local use" }, + { 23, "LOCAL7 - reserved for local use" }, + { 0, NULL }, +}; + +static gint proto_syslog = -1; +static gint hf_syslog_priority = -1; +static gint hf_syslog_facility = -1; +static gint hf_syslog_msg_len = -1; + +static gint ett_syslog = -1; + +/* I couldn't find any documentation for the syslog message format. + According to the BSD sources, the message format is '<', N, '>', and + T. N is a decimal value, which should be treated as an 8 bit + unsigned integer. The lower three bits comprise the priority, and the + upper five bits are the facility. T is the message text. + */ + +#if 0 +static void dissect_syslog(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + gint num = -1, pri, fac; + gint msg_off = 0, msg_len; + proto_item *ti; + proto_tree *syslog_tree; + gchar msg_str[COL_INFO_LEN]; +#else +static void dissect_syslog(const u_char *pd, int o, frame_data *fd, proto_tree *tree) +{ + gint num = -1, pri = -1, fac = -1; + gint msg_off = 0, msg_len; + proto_item *ti; + proto_tree *syslog_tree; + gchar msg_str[COL_INFO_LEN]; + + tvbuff_t *tvb; + packet_info *pinfo = π + tvb = tvb_new_subset(pinfo->compat_top_tvb, o, -1, -1); +#endif + + pinfo->current_proto = "Syslog"; + msg_len = tvb_length(tvb); + if (tvb_get_guint8(tvb, 0) == '<') { + msg_off++; + num = 0; + while (isdigit(tvb_get_guint8(tvb, msg_off)) && + tvb_length_remaining(tvb, msg_off)) { + num = num * 10 + (tvb_get_guint8(tvb, msg_off) - '0'); + msg_off++; + } + if (tvb_get_guint8(tvb, msg_off) == '>') + msg_off++; + msg_len = tvb_length_remaining(tvb, msg_off); + if (msg_len > ELL_LEN) { + tvb_memcpy(tvb, msg_str, msg_off, ELL_LEN); + strcpy (msg_str + ELL_LEN, ELLIPSIS); + msg_str[COL_INFO_LEN] = '\0'; + } else { + tvb_memcpy(tvb, msg_str, msg_off, msg_len); + msg_str[msg_len] = '\0'; + } + + fac = (num & FACILITY_MASK) >> 3; + pri = num & PRIORITY_MASK; + } + + if (check_col(pinfo->fd, COL_PROTOCOL)) + col_add_str(pinfo->fd, COL_PROTOCOL, "Syslog"); + + if (check_col(pinfo->fd, COL_INFO)) { + if (num >= 0) { + col_add_fstr(pinfo->fd, COL_INFO, "%s.%s: %s", + val_to_str(fac, short_fac, "UNKNOWN"), + val_to_str(pri, short_pri, "UNKNOWN"), msg_str); + } else { + col_add_fstr(pinfo->fd, COL_INFO, "%s", msg_str); + } + } + + if (tree) { + if (num >= 0) { + ti = proto_tree_add_protocol_format(tree, proto_syslog, tvb, 0, + tvb_length(tvb), "Syslog message: %s.%s: %s", + val_to_str(fac, short_fac, "UNKNOWN"), + val_to_str(pri, short_pri, "UNKNOWN"), msg_str); + } else { + ti = proto_tree_add_string(tree, proto_syslog, tvb, 0, tvb_length(tvb), + msg_str); + } + syslog_tree = proto_item_add_subtree(ti, ett_syslog); + if (num >= 0) { + ti = proto_tree_add_uint(syslog_tree, hf_syslog_facility, tvb, 0, + msg_off - 1, num); + ti = proto_tree_add_uint(syslog_tree, hf_syslog_priority, tvb, 0, + msg_off - 1, num); + } + proto_tree_add_uint_format(syslog_tree, hf_syslog_msg_len, tvb, msg_off, + msg_len, msg_len, "Message (%d byte%s)", msg_len, plurality(msg_len, "", "s")); + } + return; +} + +/* Register the protocol with Ethereal */ +void proto_register_syslog(void) +{ + + /* Setup list of header fields */ + static hf_register_info hf[] = { + { &hf_syslog_facility, + { "Facility", "syslog.facility", + FT_UINT8, BASE_DEC, VALS(long_fac), FACILITY_MASK, + "Message facility" } + }, + { &hf_syslog_priority, + { "Priority", "syslog.priority", + FT_UINT8, BASE_DEC, VALS(long_pri), PRIORITY_MASK, + "Message priority" } + }, + { &hf_syslog_msg_len, + { "Message length", "syslog.msg_len", + FT_UINT32, BASE_DEC, NULL, 0x0, + "Message length, excluding priority/facility descriptor" } + }, + }; + + /* Setup protocol subtree array */ + static gint *ett[] = { + &ett_syslog, + }; + + /* Register the protocol name and description */ + proto_syslog = proto_register_protocol("Syslog message", "syslog"); + + /* Required function calls to register the header fields and subtrees used */ + proto_register_field_array(proto_syslog, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); +}; + +void +proto_reg_handoff_syslog(void) +{ + dissector_add("udp.port", UDP_PORT_SYSLOG, dissect_syslog); +} + |