1 /* 2 * Copyright (c) 1998-2004 Hannes Gredler <hannes (at) 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 #define NETDISSECT_REWORKED 18 #ifdef HAVE_CONFIG_H 19 #include "config.h" 20 #endif 21 22 #include <tcpdump-stdinc.h> 23 24 #include "interface.h" 25 #include "extract.h" 26 27 static const char tstr[] = "[|syslog]"; 28 29 /* 30 * tokenlists and #defines taken from Ethereal - Network traffic analyzer 31 * by Gerald Combs <gerald (at) ethereal.com> 32 */ 33 34 #define SYSLOG_SEVERITY_MASK 0x0007 /* 0000 0000 0000 0111 */ 35 #define SYSLOG_FACILITY_MASK 0x03f8 /* 0000 0011 1111 1000 */ 36 #define SYSLOG_MAX_DIGITS 3 /* The maximum number if priority digits to read in. */ 37 38 static const struct tok syslog_severity_values[] = { 39 { 0, "emergency" }, 40 { 1, "alert" }, 41 { 2, "critical" }, 42 { 3, "error" }, 43 { 4, "warning" }, 44 { 5, "notice" }, 45 { 6, "info" }, 46 { 7, "debug" }, 47 { 0, NULL }, 48 }; 49 50 static const struct tok syslog_facility_values[] = { 51 { 0, "kernel" }, 52 { 1, "user" }, 53 { 2, "mail" }, 54 { 3, "daemon" }, 55 { 4, "auth" }, 56 { 5, "syslog" }, 57 { 6, "lpr" }, 58 { 7, "news" }, 59 { 8, "uucp" }, 60 { 9, "cron" }, 61 { 10, "authpriv" }, 62 { 11, "ftp" }, 63 { 12, "ntp" }, 64 { 13, "security" }, 65 { 14, "console" }, 66 { 15, "cron" }, 67 { 16, "local0" }, 68 { 17, "local1" }, 69 { 18, "local2" }, 70 { 19, "local3" }, 71 { 20, "local4" }, 72 { 21, "local5" }, 73 { 22, "local6" }, 74 { 23, "local7" }, 75 { 0, NULL }, 76 }; 77 78 void 79 syslog_print(netdissect_options *ndo, 80 register const u_char *pptr, register u_int len) 81 { 82 uint16_t msg_off = 0; 83 uint16_t pri = 0; 84 uint16_t facility,severity; 85 86 /* extract decimal figures that are 87 * encapsulated within < > tags 88 * based on this decimal figure extract the 89 * severity and facility values 90 */ 91 92 ND_TCHECK2(*pptr, 1); 93 if (*(pptr+msg_off) == '<') { 94 msg_off++; 95 ND_TCHECK2(*(pptr + msg_off), 1); 96 while ( *(pptr+msg_off) >= '0' && 97 *(pptr+msg_off) <= '9' && 98 msg_off <= SYSLOG_MAX_DIGITS) { 99 pri = pri * 10 + (*(pptr+msg_off) - '0'); 100 msg_off++; 101 ND_TCHECK2(*(pptr + msg_off), 1); 102 } 103 if (*(pptr+msg_off) != '>') { 104 ND_PRINT((ndo, "%s", tstr)); 105 return; 106 } 107 msg_off++; 108 } else { 109 ND_PRINT((ndo, "%s", tstr)); 110 return; 111 } 112 113 facility = (pri & SYSLOG_FACILITY_MASK) >> 3; 114 severity = pri & SYSLOG_SEVERITY_MASK; 115 116 if (ndo->ndo_vflag < 1 ) 117 { 118 ND_PRINT((ndo, "SYSLOG %s.%s, length: %u", 119 tok2str(syslog_facility_values, "unknown (%u)", facility), 120 tok2str(syslog_severity_values, "unknown (%u)", severity), 121 len)); 122 return; 123 } 124 125 ND_PRINT((ndo, "SYSLOG, length: %u\n\tFacility %s (%u), Severity %s (%u)\n\tMsg: ", 126 len, 127 tok2str(syslog_facility_values, "unknown (%u)", facility), 128 facility, 129 tok2str(syslog_severity_values, "unknown (%u)", severity), 130 severity)); 131 132 /* print the syslog text in verbose mode */ 133 for (; msg_off < len; msg_off++) { 134 ND_TCHECK2(*(pptr + msg_off), 1); 135 safeputchar(ndo, *(pptr + msg_off)); 136 } 137 138 if (ndo->ndo_vflag > 1) 139 print_unknown_data(ndo, pptr, "\n\t", len); 140 141 return; 142 143 trunc: 144 ND_PRINT((ndo, "%s", tstr)); 145 } 146
