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146 lines
3.9 KiB
C
146 lines
3.9 KiB
C
/*
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* Copyright (c) 1998-2004 Hannes Gredler <hannes@tcpdump.org>
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* The TCPDUMP project
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code
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* distributions retain the above copyright notice and this paragraph
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* in its entirety, and (2) distributions including binary code include
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* the above copyright notice and this paragraph in its entirety in
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* the documentation or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
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* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
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* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE.
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*/
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#define NETDISSECT_REWORKED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include "interface.h"
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#include "extract.h"
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static const char tstr[] = "[|syslog]";
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/*
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* tokenlists and #defines taken from Ethereal - Network traffic analyzer
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* by Gerald Combs <gerald@ethereal.com>
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*/
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#define SYSLOG_SEVERITY_MASK 0x0007 /* 0000 0000 0000 0111 */
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#define SYSLOG_FACILITY_MASK 0x03f8 /* 0000 0011 1111 1000 */
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#define SYSLOG_MAX_DIGITS 3 /* The maximum number if priority digits to read in. */
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static const struct tok syslog_severity_values[] = {
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{ 0, "emergency" },
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{ 1, "alert" },
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{ 2, "critical" },
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{ 3, "error" },
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{ 4, "warning" },
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{ 5, "notice" },
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{ 6, "info" },
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{ 7, "debug" },
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{ 0, NULL },
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};
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static const struct tok syslog_facility_values[] = {
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{ 0, "kernel" },
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{ 1, "user" },
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{ 2, "mail" },
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{ 3, "daemon" },
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{ 4, "auth" },
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{ 5, "syslog" },
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{ 6, "lpr" },
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{ 7, "news" },
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{ 8, "uucp" },
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{ 9, "cron" },
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{ 10, "authpriv" },
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{ 11, "ftp" },
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{ 12, "ntp" },
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{ 13, "security" },
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{ 14, "console" },
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{ 15, "cron" },
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{ 16, "local0" },
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{ 17, "local1" },
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{ 18, "local2" },
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{ 19, "local3" },
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{ 20, "local4" },
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{ 21, "local5" },
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{ 22, "local6" },
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{ 23, "local7" },
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{ 0, NULL },
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};
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void
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syslog_print(netdissect_options *ndo,
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register const u_char *pptr, register u_int len)
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{
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uint16_t msg_off = 0;
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uint16_t pri = 0;
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uint16_t facility,severity;
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/* extract decimal figures that are
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* encapsulated within < > tags
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* based on this decimal figure extract the
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* severity and facility values
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*/
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ND_TCHECK2(*pptr, 1);
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if (*(pptr+msg_off) == '<') {
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msg_off++;
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ND_TCHECK2(*(pptr + msg_off), 1);
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while ( *(pptr+msg_off) >= '0' &&
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*(pptr+msg_off) <= '9' &&
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msg_off <= SYSLOG_MAX_DIGITS) {
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pri = pri * 10 + (*(pptr+msg_off) - '0');
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msg_off++;
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ND_TCHECK2(*(pptr + msg_off), 1);
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}
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if (*(pptr+msg_off) != '>') {
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ND_PRINT((ndo, "%s", tstr));
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return;
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}
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msg_off++;
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} else {
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ND_PRINT((ndo, "%s", tstr));
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return;
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}
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facility = (pri & SYSLOG_FACILITY_MASK) >> 3;
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severity = pri & SYSLOG_SEVERITY_MASK;
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if (ndo->ndo_vflag < 1 )
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{
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ND_PRINT((ndo, "SYSLOG %s.%s, length: %u",
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tok2str(syslog_facility_values, "unknown (%u)", facility),
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tok2str(syslog_severity_values, "unknown (%u)", severity),
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len));
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return;
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}
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ND_PRINT((ndo, "SYSLOG, length: %u\n\tFacility %s (%u), Severity %s (%u)\n\tMsg: ",
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len,
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tok2str(syslog_facility_values, "unknown (%u)", facility),
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facility,
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tok2str(syslog_severity_values, "unknown (%u)", severity),
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severity));
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/* print the syslog text in verbose mode */
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for (; msg_off < len; msg_off++) {
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ND_TCHECK2(*(pptr + msg_off), 1);
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safeputchar(ndo, *(pptr + msg_off));
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}
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if (ndo->ndo_vflag > 1)
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print_unknown_data(ndo, pptr, "\n\t", len);
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return;
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trunc:
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ND_PRINT((ndo, "%s", tstr));
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}
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