diff options
Diffstat (limited to 'plugins/mmanon/mmanon.c')
| -rw-r--r-- | plugins/mmanon/mmanon.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/plugins/mmanon/mmanon.c b/plugins/mmanon/mmanon.c new file mode 100644 index 00000000..90e7fc81 --- /dev/null +++ b/plugins/mmanon/mmanon.c @@ -0,0 +1,233 @@ +/* mmanon.c + * anonnymize IP addresses inside the syslog message part + * + * Copyright 2013 Adiscon GmbH. + * + * This file is part of rsyslog. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * -or- + * see COPYING.ASL20 in the source distribution + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "config.h" +#include "rsyslog.h" +#include <stdio.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <signal.h> +#include <errno.h> +#include <unistd.h> +#include "conf.h" +#include "syslogd-types.h" +#include "srUtils.h" +#include "template.h" +#include "module-template.h" +#include "errmsg.h" + +MODULE_TYPE_OUTPUT +MODULE_TYPE_NOKEEP +MODULE_CNFNAME("mmanon") + + +DEFobjCurrIf(errmsg); +DEF_OMOD_STATIC_DATA + +/* config variables */ + + +typedef struct _instanceData { +} instanceData; + +struct modConfData_s { + rsconf_t *pConf; /* our overall config object */ +}; +static modConfData_t *loadModConf = NULL;/* modConf ptr to use for the current load process */ +static modConfData_t *runModConf = NULL;/* modConf ptr to use for the current exec process */ + +BEGINbeginCnfLoad +CODESTARTbeginCnfLoad + loadModConf = pModConf; + pModConf->pConf = pConf; +ENDbeginCnfLoad + +BEGINendCnfLoad +CODESTARTendCnfLoad +ENDendCnfLoad + +BEGINcheckCnf +CODESTARTcheckCnf +ENDcheckCnf + +BEGINactivateCnf +CODESTARTactivateCnf + runModConf = pModConf; +ENDactivateCnf + +BEGINfreeCnf +CODESTARTfreeCnf +ENDfreeCnf + + +BEGINcreateInstance +CODESTARTcreateInstance +ENDcreateInstance + + +BEGINisCompatibleWithFeature +CODESTARTisCompatibleWithFeature +ENDisCompatibleWithFeature + + +BEGINfreeInstance +CODESTARTfreeInstance +ENDfreeInstance + + +BEGINnewActInst +CODESTARTnewActInst + /* Note: we currently do not have any parameters, so we do not need + * the lst ptr. However, we will most probably need params in the + * future. + */ + DBGPRINTF("newActInst (mmanon)\n"); + CODE_STD_STRING_REQUESTnewActInst(1) + CHKiRet(OMSRsetEntry(*ppOMSR, 0, NULL, OMSR_TPL_AS_MSG)); + CHKiRet(createInstance(&pData)); + /*setInstParamDefaults(pData);*/ +CODE_STD_FINALIZERnewActInst +/* cnfparamvalsDestruct(pvals, &actpblk);*/ +ENDnewActInst + + +BEGINdbgPrintInstInfo +CODESTARTdbgPrintInstInfo +ENDdbgPrintInstInfo + + +BEGINtryResume +CODESTARTtryResume +ENDtryResume + + +static int +getnum(uchar *msg, int lenMsg, int *idx) +{ + int num = 0; + int i = *idx; + +dbgprintf("DDDD: in getnum: %s\n", msg+(*idx)); + while(i < lenMsg && msg[i] >= '0' && msg[i] <= '9') { + num = num * 10 + msg[i] - '0'; + ++i; + } + + *idx = i; +dbgprintf("DDDD: got octet %d\n", num); + return num; +} + + +/* currently works for IPv4 only! */ +void +anonip(uchar *msg, int lenMsg, int *idx) +{ + int i = *idx; + int octet; + int ipstart; + +dbgprintf("DDDD: in anonip: %s\n", msg+(*idx)); + while(i < lenMsg && (msg[i] <= '0' || msg[i] >= '9')) { + ++i; /* skip to first number */ + } + if(i >= lenMsg) + goto done; + + /* got digit, let's see if ip */ + ipstart = i; + octet = getnum(msg, lenMsg, &i); + if(octet > 255 || msg[i] != '.') goto done; + ++i; + octet = getnum(msg, lenMsg, &i); + if(octet > 255 || msg[i] != '.') goto done; + ++i; + octet = getnum(msg, lenMsg, &i); + if(octet > 255 || msg[i] != '.') goto done; + ++i; + octet = getnum(msg, lenMsg, &i); + if(octet > 255 || msg[i] != ' ') goto done; + + /* OK, we now found an ip address */ + while(ipstart < i) { + if(msg[ipstart] != '.') + msg[ipstart] = 'x'; + ++ipstart; + } + +done: *idx = i; + return; +} + + +BEGINdoAction + msg_t *pMsg; + uchar *msg; + int lenMsg; + int i; +CODESTARTdoAction + pMsg = (msg_t*) ppString[0]; + lenMsg = getMSGLen(pMsg); + msg = getMSG(pMsg); + DBGPRINTF("DDDD: calling mmanon with msg '%s'\n", msg); + for(i = 0 ; i < lenMsg ; ++i) { + anonip(msg, lenMsg, &i); + } +ENDdoAction + + +BEGINparseSelectorAct +CODESTARTparseSelectorAct +CODE_STD_STRING_REQUESTparseSelectorAct(1) + if(strncmp((char*) p, ":mmanon:", sizeof(":mmanon:") - 1)) { + errmsg.LogError(0, RS_RET_LEGA_ACT_NOT_SUPPORTED, + "mmanon supports only v6+ config format, use: " + "action(type=\"mmanon\" ...)"); + } + ABORT_FINALIZE(RS_RET_CONFLINE_UNPROCESSED); +CODE_STD_FINALIZERparseSelectorAct +ENDparseSelectorAct + + +BEGINmodExit +CODESTARTmodExit + objRelease(errmsg, CORE_COMPONENT); +ENDmodExit + + +BEGINqueryEtryPt +CODESTARTqueryEtryPt +CODEqueryEtryPt_STD_OMOD_QUERIES +CODEqueryEtryPt_STD_CONF2_OMOD_QUERIES +CODEqueryEtryPt_STD_CONF2_QUERIES +ENDqueryEtryPt + + + +BEGINmodInit() +CODESTARTmodInit + *ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */ +CODEmodInit_QueryRegCFSLineHdlr + DBGPRINTF("mmanon: module compiled with rsyslog version %s.\n", VERSION); + CHKiRet(objUse(errmsg, CORE_COMPONENT)); +ENDmodInit |