/* * Mausezahn - A fast versatile traffic generator * Copyright (C) 2008,2009 Herbert Haas * * This program is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License version 2 as published by the * Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License along with * this program; if not, see http://www.gnu.org/licenses/gpl-2.0.html * */ #include "mz.h" #include "cli.h" #define MZ_SYSLOG_HELP \ "| Syslog type: Send (traditional) Syslog packets via UDP.\n" \ "|\n" \ "| Parameters:\n" \ "|\n" \ "| severity, sev 0-7 .... Severity level from Emergency (0) to Debug (7)\n" \ "| facility, fac 0-23 .... Facility number\n" \ "|\n" \ "| time hh:mm:ss .... Local time, 24-hour format\n" \ "| month, mon Mmm .... Current month, 1-12\n" \ "| day dd .... Current day, 0-31\n" \ "|\n" \ "| host max 314 bytes .... Name or IP Address of sending host\n" \ "|\n" \ "| Defaults:\n" \ "|\n" \ "| Per default the severity \"Warning\" (4), the facility \"Security\" (4), and the\n" \ "| current time stamp is used. If no host is given, host is set to \"MZ\"\n" \ "|\n" \ "| You can define the Syslog message itself using the -P flag. For example:\n" \ "|\n" \ "| mz eth0 -t syslog sev=3 -P \"You have been mausezahned.\"\n" \ "|\n" \ "| By the way, mz (by intention) does not check if your timestamp is valid according\n" \ "| calendar rules. It is generally recommended to follow the Darwin Era Calendar ;-)\n" \ "|\n" // RFC 3164 states that a Syslog message consists of three parts: PRI, HEADER, and MSG. // // 1) PRI: contains facility(f) and severity(s), using the syntax "" where N = f * 8 + s // // 2) HEADER: contains a timestamp and a sender-ID (name or IP), for example "May 25 23:42:42 Mausezahnhost" // Note that instead of leading zeroes a space must be used for the day e. g. "May 5". // However leading zeroes are required for hour, minutes, seconds, e. g. "01:05:09" // // 3) MSG: consists of TAG and CONTENT field. The TAG identifies the program or process and // must not exceed 32 characters. Typically the TAG and the CONTENT fields are delimited // via either a "[", or a colon (:) or a space. The CONTENT field is a simple text. // // EXAMPLE from RFC 3164: // // <34>Oct 11 22:14:15 mymachine su: 'su root' failed for lonvick on /dev/pts/8 // // EXAMPLE from Cisco Router: // // *Mar 23 13:45:08.727: %ENVMON-3-FAN_FAILED: Fan 2 not rotating // int create_syslog_packet(void) { unsigned int pri, sev, fac, day, curday, mon, curmon; char lt[8], host[314]; char *Months[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; time_t curtime; struct tm curtime_broken; char argval[MAX_PAYLOAD_SIZE]; int ca=0, aa; aa=number_of_args(tx.arg_string); if ( (getarg(tx.arg_string,"help", NULL)==1) && (mode==SYSLOG) ) { ca++; // counts each argument if (mz_port) { cli_print(gcli, "%s", MZ_SYSLOG_HELP); return -1; } else { fprintf(stderr,"\n" MAUSEZAHN_VERSION "\n%s", MZ_SYSLOG_HELP); exit(0); } } if ( (getarg(tx.arg_string,"severity", argval)==1) || (getarg(tx.arg_string,"sev", argval)==1) ) { ca++; // counts each argument sev = (unsigned int) str2int(argval); } else { sev = 4; } if ( (getarg(tx.arg_string,"facility", argval)==1) || (getarg(tx.arg_string,"fac", argval)==1) ) { ca++; // counts each argument fac = (unsigned int) str2int(argval); } else { fac = 4; } time(&curtime); localtime_r (&curtime, &curtime_broken); if (getarg(tx.arg_string,"time", argval)==1) { ca++; // counts each argument strncpy(lt,argval,8); // TODO: check if specified timestamp has valid format, e. g. 15:03:22 } else { timestamp_hms (lt); } curmon = curtime_broken.tm_mon; // Note that Jan = 0, ..., Dec = 11 !!! if ( (getarg(tx.arg_string,"month", argval)==1) || (getarg(tx.arg_string,"mon", argval)==1) ) { ca++; // counts each argument mon = (unsigned int) str2int(argval); if ( (mon<1) || (mon>12) ) { fprintf(stderr, " mz/syslog: Invalid month; will use current month (%i)!\n", curmon+1); mon = curmon; } } else { mon = curmon; } curday = curtime_broken.tm_mday; if (getarg(tx.arg_string,"day", argval)==1) { ca++; // counts each argument day = (unsigned int) str2int(argval); if ( (day<1) || (day>31) ) { fprintf(stderr, " mz/syslog: Invalid day; will use current day(%i)!\n", curday); day = curday; } } else { day = curday; } if (getarg(tx.arg_string,"host", argval)==1) { ca++; // counts each argument strncpy(host,argval,314); // 314 is just an arbitrary number ;-) } else { strcpy(host, "MZ42"); } // CHECK SURPLUS ARGUMENTS if (aa!=ca) { fprintf(stderr, "WARNING: %i unmatched arguments within argument string!\n", aa-ca); } // Now put everything together: // // Again the EXAMPLE from RFC 3164: // // <34>Oct 11 22:14:15 mymachine su: 'su root' failed for lonvick on /dev/pts/8 // pri = 8*fac+sev; sprintf((char*) tx.udp_payload, "<%d>%s %2i %s %s ", pri, Months[mon], day, lt, host); if (tx.ascii) // ASCII PAYLOAD overrides hex payload { strncat((char *)tx.udp_payload, (char *)tx.ascii_payload, 2048); tx.ascii=0; // avoid that 'create_udp_packet' overwrites this! } else { strcat((char *)tx.udp_payload, "%MZSYS-42-CRN: Main reactor exceeded critical temperature!"); } tx.udp_payload_s = strlen((char *)tx.udp_payload); tx.dp = 514; tx.sp = 514; tx.udp_len = 8 + tx.udp_payload_s; if (verbose) { fprintf(stderr, "Syslog: %s\n", tx.udp_payload); } return 0; }