1 /* 2 * Copyright (c) 1998-2004 Hannes Gredler <hannes@tcpdump.org> 3 * The TCPDUMP project 4 * 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. 15 */ 16 17 #include <sys/cdefs.h> 18 #ifndef lint 19 #if 0 20 static const char rcsid[] _U_ = 21 "@(#) Header: /tcpdump/master/tcpdump/print-syslog.c,v 1.1 2004-10-29 11:42:53 hannes Exp"; 22 #else 23 __RCSID("$NetBSD: print-syslog.c,v 1.2 2010/12/05 05:11:31 christos Exp $"); 24 #endif 25 #endif 26 27 #ifdef HAVE_CONFIG_H 28 #include "config.h" 29 #endif 30 31 #include <tcpdump-stdinc.h> 32 33 #include <stdio.h> 34 #include <stdlib.h> 35 36 #include "interface.h" 37 #include "extract.h" 38 #include "addrtoname.h" 39 40 /* 41 * tokenlists and #defines taken from Ethereal - Network traffic analyzer 42 * by Gerald Combs <gerald@ethereal.com> 43 */ 44 45 #define SYSLOG_SEVERITY_MASK 0x0007 /* 0000 0000 0000 0111 */ 46 #define SYSLOG_FACILITY_MASK 0x03f8 /* 0000 0011 1111 1000 */ 47 #define SYSLOG_MAX_DIGITS 3 /* The maximum number if priority digits to read in. */ 48 49 static const struct tok syslog_severity_values[] = { 50 { 0, "emergency" }, 51 { 1, "alert" }, 52 { 2, "critical" }, 53 { 3, "error" }, 54 { 4, "warning" }, 55 { 5, "notice" }, 56 { 6, "info" }, 57 { 7, "debug" }, 58 { 0, NULL }, 59 }; 60 61 static const struct tok syslog_facility_values[] = { 62 { 0, "kernel" }, 63 { 1, "user" }, 64 { 2, "mail" }, 65 { 3, "daemon" }, 66 { 4, "auth" }, 67 { 5, "syslog" }, 68 { 6, "lpr" }, 69 { 7, "news" }, 70 { 8, "uucp" }, 71 { 9, "cron" }, 72 { 10, "authpriv" }, 73 { 11, "ftp" }, 74 { 12, "ntp" }, 75 { 13, "security" }, 76 { 14, "console" }, 77 { 15, "cron" }, 78 { 16, "local0" }, 79 { 17, "local1" }, 80 { 18, "local2" }, 81 { 19, "local3" }, 82 { 20, "local4" }, 83 { 21, "local5" }, 84 { 22, "local6" }, 85 { 23, "local7" }, 86 { 0, NULL }, 87 }; 88 89 void 90 syslog_print(register const u_char *pptr, register u_int len) 91 { 92 u_int16_t msg_off = 0; 93 u_int16_t pri = 0; 94 u_int16_t facility,severity; 95 96 /* extract decimal figures that are 97 * encapsulated within < > tags 98 * based on this decimal figure extract the 99 * severity and facility values 100 */ 101 102 if (!TTEST2(*pptr, 1)) 103 goto trunc; 104 105 if (*(pptr+msg_off) == '<') { 106 msg_off++; 107 108 if (!TTEST2(*(pptr+msg_off), 1)) 109 goto trunc; 110 111 while ( *(pptr+msg_off) >= '0' && 112 *(pptr+msg_off) <= '9' && 113 msg_off <= SYSLOG_MAX_DIGITS) { 114 115 if (!TTEST2(*(pptr+msg_off), 1)) 116 goto trunc; 117 118 pri = pri * 10 + (*(pptr+msg_off) - '0'); 119 msg_off++; 120 121 if (!TTEST2(*(pptr+msg_off), 1)) 122 goto trunc; 123 124 if (*(pptr+msg_off) == '>') 125 msg_off++; 126 } 127 } else { 128 printf("[|syslog]"); 129 return; 130 } 131 132 facility = (pri & SYSLOG_FACILITY_MASK) >> 3; 133 severity = pri & SYSLOG_SEVERITY_MASK; 134 135 136 if (vflag < 1 ) 137 { 138 printf("SYSLOG %s.%s, length: %u", 139 tok2str(syslog_facility_values, "unknown (%u)", facility), 140 tok2str(syslog_severity_values, "unknown (%u)", severity), 141 len); 142 return; 143 } 144 145 printf("SYSLOG, length: %u\n\tFacility %s (%u), Severity %s (%u)\n\tMsg: ", 146 len, 147 tok2str(syslog_facility_values, "unknown (%u)", facility), 148 facility, 149 tok2str(syslog_severity_values, "unknown (%u)", severity), 150 severity); 151 152 /* print the syslog text in verbose mode */ 153 for (; msg_off < len; msg_off++) { 154 if (!TTEST2(*(pptr+msg_off), 1)) 155 goto trunc; 156 safeputchar(*(pptr+msg_off)); 157 } 158 159 if (vflag > 1) { 160 if(!print_unknown_data(pptr,"\n\t",len)) 161 return; 162 } 163 164 return; 165 166 trunc: 167 printf("[|syslog]"); 168 } 169