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