2 * Copyright (c) 1998-2004 Hannes Gredler <hannes@gredler.at>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code
7 * distributions retain the above copyright notice and this paragraph
8 * in its entirety, and (2) distributions including binary code include
9 * the above copyright notice and this paragraph in its entirety in
10 * the documentation or other materials provided with the distribution.
11 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
12 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
13 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
14 * FOR A PARTICULAR PURPOSE.
17 /* \summary: Syslog protocol printer */
23 #include <netdissect-stdinc.h>
25 #include "netdissect.h"
28 static const char tstr[] = "[|syslog]";
31 * tokenlists and #defines taken from Ethereal - Network traffic analyzer
32 * by Gerald Combs <gerald@ethereal.com>
35 #define SYSLOG_SEVERITY_MASK 0x0007 /* 0000 0000 0000 0111 */
36 #define SYSLOG_FACILITY_MASK 0x03f8 /* 0000 0011 1111 1000 */
37 #define SYSLOG_MAX_DIGITS 3 /* The maximum number if priority digits to read in. */
39 static const struct tok syslog_severity_values[] = {
51 static const struct tok syslog_facility_values[] = {
80 syslog_print(netdissect_options *ndo,
81 register const u_char *pptr, register u_int len)
85 uint16_t facility,severity;
87 /* extract decimal figures that are
88 * encapsulated within < > tags
89 * based on this decimal figure extract the
90 * severity and facility values
94 if (*(pptr+msg_off) == '<') {
96 ND_TCHECK2(*(pptr + msg_off), 1);
97 while ( *(pptr+msg_off) >= '0' &&
98 *(pptr+msg_off) <= '9' &&
99 msg_off <= SYSLOG_MAX_DIGITS) {
100 pri = pri * 10 + (*(pptr+msg_off) - '0');
102 ND_TCHECK2(*(pptr + msg_off), 1);
104 if (*(pptr+msg_off) != '>') {
105 ND_PRINT((ndo, "%s", tstr));
110 ND_PRINT((ndo, "%s", tstr));
114 facility = (pri & SYSLOG_FACILITY_MASK) >> 3;
115 severity = pri & SYSLOG_SEVERITY_MASK;
117 if (ndo->ndo_vflag < 1 )
119 ND_PRINT((ndo, "SYSLOG %s.%s, length: %u",
120 tok2str(syslog_facility_values, "unknown (%u)", facility),
121 tok2str(syslog_severity_values, "unknown (%u)", severity),
126 ND_PRINT((ndo, "SYSLOG, length: %u\n\tFacility %s (%u), Severity %s (%u)\n\tMsg: ",
128 tok2str(syslog_facility_values, "unknown (%u)", facility),
130 tok2str(syslog_severity_values, "unknown (%u)", severity),
133 /* print the syslog text in verbose mode */
134 for (; msg_off < len; msg_off++) {
135 ND_TCHECK2(*(pptr + msg_off), 1);
136 safeputchar(ndo, *(pptr + msg_off));
139 if (ndo->ndo_vflag > 1)
140 print_unknown_data(ndo, pptr, "\n\t", len);
145 ND_PRINT((ndo, "%s", tstr));