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