cygnal - "Cygwin Native Application Lib" --- http://www.kylheku.com/cygnal

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author	Danny Smith <dannysmith@users.sourceforge.net>	2004-11-04 07:09:52 +0000
committer	Danny Smith <dannysmith@users.sourceforge.net>	2004-11-04 07:09:52 +0000
commit	c3ea0cd332ce0800364ad81d388f61ecf7210234 (patch)
tree	1595f056268691059337b047db6a75de0251b49c /newlib/libc/stdlib/atexit.c
parent	9dee1466e82480dc1224da64cb654f4b0a286ca8 (diff)
download	cygnal-c3ea0cd332ce0800364ad81d388f61ecf7210234.tar.gz cygnal-c3ea0cd332ce0800364ad81d388f61ecf7210234.tar.bz2 cygnal-c3ea0cd332ce0800364ad81d388f61ecf7210234.zip

* include/wingdi.h (NIF_INFO): Add define.

(NIIF_*) Add defines.. Thanks to: Benoit Blanchon <benoit.blanchon@free.fr> (NIF_*): Convert constants to hex.

Diffstat (limited to 'newlib/libc/stdlib/atexit.c')

0 files changed, 0 insertions, 0 deletions

/* omfwd.c * This is the implementation of the build-in forwarding output module. * * NOTE: read comments in module-template.h to understand how this file * works! * * Copyright 2007-2013 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. * * TODO v6 config: * - permitted peer *list* */ #include "config.h" #include "rsyslog.h" #include <stdio.h> #include <stdarg.h> #include <stdlib.h> #include <string.h> #include <time.h> #include <netinet/in.h> #include <netdb.h> #include <fnmatch.h> #include <assert.h> #include <errno.h> #include <ctype.h> #include <unistd.h> #include <stdint.h> #ifdef USE_NETZIP #include <zlib.h> #endif #include <pthread.h> #include "syslogd.h" #include "conf.h" #include "syslogd-types.h" #include "srUtils.h" #include "net.h" #include "netstrms.h" #include "netstrm.h" #include "omfwd.h" #include "template.h" #include "msg.h" #include "tcpclt.h" #include "cfsysline.h" #include "module-template.h" #include "glbl.h" #include "errmsg.h" #include "unicode-helper.h" MODULE_TYPE_OUTPUT MODULE_TYPE_NOKEEP MODULE_CNFNAME("omfwd") /* internal structures */ DEF_OMOD_STATIC_DATA DEFobjCurrIf(errmsg) DEFobjCurrIf(glbl) DEFobjCurrIf(net) DEFobjCurrIf(netstrms) DEFobjCurrIf(netstrm) DEFobjCurrIf(tcpclt) typedef struct _instanceData { uchar *tplName; /* name of assigned template */ netstrms_t *pNS; /* netstream subsystem */ netstrm_t *pNetstrm; /* our output netstream */ uchar *pszStrmDrvr; uchar *pszStrmDrvrAuthMode; permittedPeers_t *pPermPeers; int iStrmDrvrMode; char *target; int *pSockArray; /* sockets to use for UDP */ int bIsConnected; /* are we connected to remote host? 0 - no, 1 - yes, UDP means addr resolved */ struct addrinfo *f_addr; int compressionLevel; /* 0 - no compression, else level for zlib */ char *port; int protocol; int iRebindInterval; /* rebind interval */ int nXmit; /* number of transmissions since last (re-)bind */ # define FORW_UDP 0 # define FORW_TCP 1 /* following fields for TCP-based delivery */ TCPFRAMINGMODE tcp_framing; int bResendLastOnRecon; /* should the last message be re-sent on a successful reconnect? */ tcpclt_t *pTCPClt; /* our tcpclt object */ # define COMPRESS_NEVER 0 # define COMPRESS_SINGLE_MSG 1 /* old, single-message compression */ /* all other settings are for stream-compression */ # define COMPRESS_STREAM_ALWAYS 2 uint8_t compressionMode; sbool bzInitDone; /* did we do an init of zstrm already? */ z_stream zstrm; /* zip stream to use for tcp compression */ uchar sndBuf[16*1024]; /* this is intensionally fixed -- see no good reason to make configurable */ unsigned offsSndBuf; /* next free spot in send buffer */ } instanceData; /* config data */ typedef struct configSettings_s { uchar *pszTplName; /* name of the default template to use */ uchar *pszStrmDrvr; /* name of the stream driver to use */ int iStrmDrvrMode; /* mode for stream driver, driver-dependent (0 mostly means plain tcp) */ int bResendLastOnRecon; /* should the last message be re-sent on a successful reconnect? */ uchar *pszStrmDrvrAuthMode; /* authentication mode to use */ int iTCPRebindInterval; /* support for automatic re-binding (load balancers!). 0 - no rebind */ int iUDPRebindInterval; /* support for automatic re-binding (load balancers!). 0 - no rebind */ permittedPeers_t *pPermPeers; } configSettings_t; static configSettings_t cs; /* tables for interfacing with the v6 config system */ /* module-global parameters */ static struct cnfparamdescr modpdescr[] = { { "template", eCmdHdlrGetWord, 0 }, }; static struct cnfparamblk modpblk = { CNFPARAMBLK_VERSION, sizeof(modpdescr)/sizeof(struct cnfparamdescr), modpdescr }; /* action (instance) parameters */ static struct cnfparamdescr actpdescr[] = { { "target", eCmdHdlrGetWord, 0 }, { "port", eCmdHdlrGetWord, 0 }, { "protocol", eCmdHdlrGetWord, 0 }, { "tcp_framing", eCmdHdlrGetWord, 0 }, { "ziplevel", eCmdHdlrInt, 0 }, { "compression.mode", eCmdHdlrGetWord, 0 }, { "rebindinterval", eCmdHdlrInt, 0 }, { "streamdriver", eCmdHdlrGetWord, 0 }, { "streamdrivermode", eCmdHdlrInt, 0 }, { "streamdriverauthmode", eCmdHdlrGetWord, 0 }, { "streamdriverpermittedpeers", eCmdHdlrGetWord, 0 }, { "resendlastmsgonreconnect", eCmdHdlrBinary, 0 }, { "template", eCmdHdlrGetWord, 0 }, }; static struct cnfparamblk actpblk = { CNFPARAMBLK_VERSION, sizeof(actpdescr)/sizeof(struct cnfparamdescr), actpdescr }; struct modConfData_s { rsconf_t *pConf; /* our overall config object */ uchar *tplName; /* default template */ }; 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 */ BEGINinitConfVars /* (re)set config variables to default values */ CODESTARTinitConfVars cs.pszTplName = NULL; /* name of the default template to use */ cs.pszStrmDrvr = NULL; /* name of the stream driver to use */ cs.iStrmDrvrMode = 0; /* mode for stream driver, driver-dependent (0 mostly means plain tcp) */ cs.bResendLastOnRecon = 0; /* should the last message be re-sent on a successful reconnect? */ cs.pszStrmDrvrAuthMode = NULL; /* authentication mode to use */ cs.iUDPRebindInterval = 0; /* support for automatic re-binding (load balancers!). 0 - no rebind */ cs.iTCPRebindInterval = 0; /* support for automatic re-binding (load balancers!). 0 - no rebind */ cs.pPermPeers = NULL; ENDinitConfVars static rsRetVal doTryResume(instanceData *pData); static rsRetVal doZipFinish(instanceData *pData); /* this function gets the default template. It coordinates action between * old-style and new-style configuration parts. */ static inline uchar* getDfltTpl(void) { if(loadModConf != NULL && loadModConf->tplName != NULL) return loadModConf->tplName; else if(cs.pszTplName == NULL) return (uchar*)"RSYSLOG_TraditionalForwardFormat"; else return cs.pszTplName; } /* set the default template to be used * This is a module-global parameter, and as such needs special handling. It needs to * be coordinated with values set via the v2 config system (rsyslog v6+). What we do * is we do not permit this directive after the v2 config system has been used to set * the parameter. */ static rsRetVal setLegacyDfltTpl(void __attribute__((unused)) *pVal, uchar* newVal) { DEFiRet; if(loadModConf != NULL && loadModConf->tplName != NULL) { free(newVal); errmsg.LogError(0, RS_RET_ERR, "omfwd default template already set via module " "global parameter - can no longer be changed"); ABORT_FINALIZE(RS_RET_ERR); } free(cs.pszTplName); cs.pszTplName = newVal; finalize_it: RETiRet; } /* Close the UDP sockets. * rgerhards, 2009-05-29 */ static rsRetVal closeUDPSockets(instanceData *pData) { DEFiRet; assert(pData != NULL); if(pData->pSockArray != NULL) { net.closeUDPListenSockets(pData->pSockArray); pData->pSockArray = NULL; freeaddrinfo(pData->f_addr); pData->f_addr = NULL; } pData->bIsConnected = 0; // TODO: remove this variable altogether RETiRet; } /* destruct the TCP helper objects * This, for example, is needed after something went wrong. * This function is void because it "can not" fail. * rgerhards, 2008-06-04 * Note that we DO NOT discard the current buffer contents * (if any). This permits us to save data between sessions. In * the wort case, some duplication occurs, but we do not * loose data. */ static inline void DestructTCPInstanceData(instanceData *pData) { assert(pData != NULL); doZipFinish(pData); if(pData->pNetstrm != NULL) netstrm.Destruct(&pData->pNetstrm); if(pData->pNS != NULL) netstrms.Destruct(&pData->pNS); } BEGINbeginCnfLoad CODESTARTbeginCnfLoad loadModConf = pModConf; pModConf->pConf = pConf; pModConf->tplName = NULL; ENDbeginCnfLoad BEGINsetModCnf struct cnfparamvals *pvals = NULL; int i; CODESTARTsetModCnf pvals = nvlstGetParams(lst, &modpblk, NULL); if(pvals == NULL) { errmsg.LogError(0, RS_RET_MISSING_CNFPARAMS, "error processing module " "config parameters [module(...)]"); ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS); } if(Debug) { dbgprintf("module (global) param blk for omfwd:\n"); cnfparamsPrint(&modpblk, pvals); } for(i = 0 ; i < modpblk.nParams ; ++i) { if(!pvals[i].bUsed) continue; if(!strcmp(modpblk.descr[i].name, "template")) { loadModConf->tplName = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); if(cs.pszTplName != NULL) { errmsg.LogError(0, RS_RET_DUP_PARAM, "omfwd: warning: default template " "was already set via legacy directive - may lead to inconsistent " "results."); } } else { dbgprintf("omfwd: program error, non-handled " "param '%s' in beginCnfLoad\n", modpblk.descr[i].name); } } finalize_it: if(pvals != NULL) cnfparamvalsDestruct(pvals, &modpblk); ENDsetModCnf BEGINendCnfLoad CODESTARTendCnfLoad loadModConf = NULL; /* done loading */ /* free legacy config vars */ free(cs.pszTplName); cs.pszTplName = NULL; ENDendCnfLoad BEGINcheckCnf CODESTARTcheckCnf ENDcheckCnf BEGINactivateCnf CODESTARTactivateCnf runModConf = pModConf; ENDactivateCnf BEGINfreeCnf CODESTARTfreeCnf free(pModConf->tplName); ENDfreeCnf BEGINcreateInstance CODESTARTcreateInstance pData->offsSndBuf = 0; ENDcreateInstance BEGINisCompatibleWithFeature CODESTARTisCompatibleWithFeature if(eFeat == sFEATURERepeatedMsgReduction) iRet = RS_RET_OK; ENDisCompatibleWithFeature BEGINfreeInstance CODESTARTfreeInstance /* final cleanup */ DestructTCPInstanceData(pData); closeUDPSockets(pData); if(pData->protocol == FORW_TCP) { tcpclt.Destruct(&pData->pTCPClt); } free(pData->port); free(pData->target); free(pData->pszStrmDrvr); free(pData->pszStrmDrvrAuthMode); net.DestructPermittedPeers(&pData->pPermPeers); ENDfreeInstance BEGINdbgPrintInstInfo CODESTARTdbgPrintInstInfo dbgprintf("%s", pData->target); ENDdbgPrintInstInfo /* Send a message via UDP * rgehards, 2007-12-20 */ static rsRetVal UDPSend(instanceData *pData, char *msg, size_t len) { DEFiRet; struct addrinfo *r; int i; unsigned lsent = 0; int bSendSuccess; if(pData->iRebindInterval && (pData->nXmit++ % pData->iRebindInterval == 0)) { dbgprintf("omfwd dropping UDP 'connection' (as configured)\n"); pData->nXmit = 1; /* else we have an addtl wrap at 2^31-1 */ CHKiRet(closeUDPSockets(pData)); } if(pData->pSockArray == NULL) { CHKiRet(doTryResume(pData)); } if(pData->pSockArray != NULL) { /* we need to track if we have success sending to the remote * peer. Success is indicated by at least one sendto() call * succeeding. We track this be bSendSuccess. We can not simply * rely on lsent, as a call might initially work, but a later * call fails. Then, lsent has the error status, even though * the sendto() succeeded. -- rgerhards, 2007-06-22 */ bSendSuccess = RSFALSE; for (r = pData->f_addr; r; r = r->ai_next) { for (i = 0; i < *pData->pSockArray; i++) { lsent = sendto(pData->pSockArray[i+1], msg, len, 0, r->ai_addr, r->ai_addrlen); if (lsent == len) { bSendSuccess = RSTRUE; break; } else { int eno = errno; char errStr[1024]; dbgprintf("sendto() error: %d = %s.\n", eno, rs_strerror_r(eno, errStr, sizeof(errStr))); } } if (lsent == len && !send_to_all) break; } /* finished looping */ if (bSendSuccess == RSFALSE) { dbgprintf("error forwarding via udp, suspending\n"); iRet = RS_RET_SUSPENDED; } } finalize_it: RETiRet; } /* set the permitted peers -- rgerhards, 2008-05-19 */ static rsRetVal setPermittedPeer(void __attribute__((unused)) *pVal, uchar *pszID) { DEFiRet; CHKiRet(net.AddPermittedPeer(&cs.pPermPeers, pszID)); free(pszID); /* no longer needed, but we must free it as of interface def */ finalize_it: RETiRet; } /* CODE FOR SENDING TCP MESSAGES */ static rsRetVal TCPSendBufUncompressed(instanceData *pData, uchar *buf, unsigned len) { DEFiRet; unsigned alreadySent; ssize_t lenSend; alreadySent = 0; CHKiRet(netstrm.CheckConnection(pData->pNetstrm)); /* hack for plain tcp syslog - see ptcp driver for details */ while(alreadySent != len) { lenSend = len - alreadySent; CHKiRet(netstrm.Send(pData->pNetstrm, buf+alreadySent, &lenSend)); DBGPRINTF("omfwd: TCP sent %ld bytes, requested %u\n", (long) lenSend, len - alreadySent); alreadySent += lenSend; } finalize_it: if(iRet != RS_RET_OK) { /* error! */ dbgprintf("TCPSendBuf error %d, destruct TCP Connection!\n", iRet); DestructTCPInstanceData(pData); iRet = RS_RET_SUSPENDED; } RETiRet; } static rsRetVal TCPSendBufCompressed(instanceData *pData, uchar *buf, unsigned len) { int zRet; /* zlib return state */ unsigned outavail; uchar zipBuf[32*1024]; DEFiRet; if(!pData->bzInitDone) { /* allocate deflate state */ pData->zstrm.zalloc = Z_NULL; pData->zstrm.zfree = Z_NULL; pData->zstrm.opaque = Z_NULL; /* see note in file header for the params we use with deflateInit2() */ zRet = deflateInit(&pData->zstrm, 9); if(zRet != Z_OK) { DBGPRINTF("error %d returned from zlib/deflateInit()\n", zRet); ABORT_FINALIZE(RS_RET_ZLIB_ERR); } pData->bzInitDone = RSTRUE; } /* now doing the compression */ pData->zstrm.next_in = (Bytef*) buf; pData->zstrm.avail_in = len; /* run deflate() on buffer until everything has been compressed */ do { DBGPRINTF("omfwd: in deflate() loop, avail_in %d, total_in %ld\n", pData->zstrm.avail_in, pData->zstrm.total_in); pData->zstrm.avail_out = sizeof(zipBuf); pData->zstrm.next_out = zipBuf; zRet = deflate(&pData->zstrm, Z_NO_FLUSH); /* no bad return value */ DBGPRINTF("after deflate, ret %d, avail_out %d\n", zRet, pData->zstrm.avail_out); outavail = sizeof(zipBuf) - pData->zstrm.avail_out; if(outavail != 0) { CHKiRet(TCPSendBufUncompressed(pData, zipBuf, outavail)); } } while (pData->zstrm.avail_out == 0); finalize_it: RETiRet; } static rsRetVal TCPSendBuf(instanceData *pData, uchar *buf, unsigned len) { DEFiRet; if(pData->compressionMode >= COMPRESS_STREAM_ALWAYS) iRet = TCPSendBufCompressed(pData, buf, len); else iRet = TCPSendBufUncompressed(pData, buf, len); RETiRet; } /* finish zlib buffer, to be called before closing the ZIP file (if * running in stream mode). */ static rsRetVal doZipFinish(instanceData *pData) { int zRet; /* zlib return state */ DEFiRet; unsigned outavail; uchar zipBuf[32*1024]; if(!pData->bzInitDone) goto done; // TODO: can we get this into a single common function? dbgprintf("DDDD: in doZipFinish()\n"); pData->zstrm.avail_in = 0; /* run deflate() on buffer until everything has been compressed */ do { DBGPRINTF("in deflate() loop, avail_in %d, total_in %ld\n", pData->zstrm.avail_in, pData->zstrm.total_in); pData->zstrm.avail_out = sizeof(zipBuf); pData->zstrm.next_out = zipBuf; zRet = deflate(&pData->zstrm, Z_FINISH); /* no bad return value */ DBGPRINTF("after deflate, ret %d, avail_out %d\n", zRet, pData->zstrm.avail_out); outavail = sizeof(zipBuf) - pData->zstrm.avail_out; if(outavail != 0) { CHKiRet(TCPSendBufUncompressed(pData, zipBuf, outavail)); } } while (pData->zstrm.avail_out == 0); finalize_it: zRet = deflateEnd(&pData->zstrm); if(zRet != Z_OK) { DBGPRINTF("error %d returned from zlib/deflateEnd()\n", zRet); } pData->bzInitDone = 0; done: RETiRet; } /* Add frame to send buffer (or send, if requried) */ static rsRetVal TCPSendFrame(void *pvData, char *msg, size_t len) { DEFiRet; instanceData *pData = (instanceData *) pvData; DBGPRINTF("omfwd: add %u bytes to send buffer (curr offs %u)\n", (unsigned) len, pData->offsSndBuf); if(pData->offsSndBuf != 0 && pData->offsSndBuf + len >= sizeof(pData->sndBuf)) { /* no buffer space left, need to commit previous records */ CHKiRet(TCPSendBuf(pData, pData->sndBuf, pData->offsSndBuf)); pData->offsSndBuf = 0; iRet = RS_RET_PREVIOUS_COMMITTED; } /* check if the message is too large to fit into buffer */ if(len > sizeof(pData->sndBuf)) { CHKiRet(TCPSendBuf(pData, (uchar*)msg, len)); ABORT_FINALIZE(RS_RET_OK); /* committed everything so far */ } /* we now know the buffer has enough free space */ memcpy(pData->sndBuf + pData->offsSndBuf, msg, len); pData->offsSndBuf += len; iRet = RS_RET_DEFER_COMMIT; finalize_it: RETiRet; } /* This function is called immediately before a send retry is attempted. * It shall clean up whatever makes sense. * rgerhards, 2007-12-28 */ static rsRetVal TCPSendPrepRetry(void *pvData) { DEFiRet; instanceData *pData = (instanceData *) pvData; dbgprintf("TCPSendPrepRetry performs a DestructTCPInstanceData\n"); assert(pData != NULL); DestructTCPInstanceData(pData); RETiRet; } /* initializes everything so that TCPSend can work. * rgerhards, 2007-12-28 */ static rsRetVal TCPSendInit(void *pvData) { DEFiRet; instanceData *pData = (instanceData *) pvData; assert(pData != NULL); if(pData->pNetstrm == NULL) { dbgprintf("TCPSendInit CREATE\n"); CHKiRet(netstrms.Construct(&pData->pNS)); /* the stream driver must be set before the object is finalized! */ CHKiRet(netstrms.SetDrvrName(pData->pNS, pData->pszStrmDrvr)); CHKiRet(netstrms.ConstructFinalize(pData->pNS)); /* now create the actual stream and connect to the server */ CHKiRet(netstrms.CreateStrm(pData->pNS, &pData->pNetstrm)); CHKiRet(netstrm.ConstructFinalize(pData->pNetstrm)); CHKiRet(netstrm.SetDrvrMode(pData->pNetstrm, pData->iStrmDrvrMode)); /* now set optional params, but only if they were actually configured */ if(pData->pszStrmDrvrAuthMode != NULL) { CHKiRet(netstrm.SetDrvrAuthMode(pData->pNetstrm, pData->pszStrmDrvrAuthMode)); } if(pData->pPermPeers != NULL) { CHKiRet(netstrm.SetDrvrPermPeers(pData->pNetstrm, pData->pPermPeers)); } /* params set, now connect */ CHKiRet(netstrm.Connect(pData->pNetstrm, glbl.GetDefPFFamily(), (uchar*)pData->port, (uchar*)pData->target)); } finalize_it: if(iRet != RS_RET_OK) { dbgprintf("TCPSendInit FAILED with %d.\n", iRet); DestructTCPInstanceData(pData); } RETiRet; } /* try to resume connection if it is not ready * rgerhards, 2007-08-02 */ static rsRetVal doTryResume(instanceData *pData) { int iErr; struct addrinfo *res; struct addrinfo hints; DEFiRet; if(pData->bIsConnected) FINALIZE; /* The remote address is not yet known and needs to be obtained */ dbgprintf(" %s\n", pData->target); if(pData->protocol == FORW_UDP) { memset(&hints, 0, sizeof(hints)); /* port must be numeric, because config file syntax requires this */ hints.ai_flags = AI_NUMERICSERV; hints.ai_family = glbl.GetDefPFFamily(); hints.ai_socktype = SOCK_DGRAM; if((iErr = (getaddrinfo(pData->target, pData->port, &hints, &res))) != 0) { dbgprintf("could not get addrinfo for hostname '%s':'%s': %d%s\n", pData->target, pData->port, iErr, gai_strerror(iErr)); ABORT_FINALIZE(RS_RET_SUSPENDED); } dbgprintf("%s found, resuming.\n", pData->target); pData->f_addr = res; pData->bIsConnected = 1; if(pData->pSockArray == NULL) { pData->pSockArray = net.create_udp_socket((uchar*)pData->target, NULL, 0); } } else { CHKiRet(TCPSendInit((void*)pData)); } finalize_it: if(iRet != RS_RET_OK) { if(pData->f_addr != NULL) { freeaddrinfo(pData->f_addr); pData->f_addr = NULL; } iRet = RS_RET_SUSPENDED; } RETiRet; } BEGINtryResume CODESTARTtryResume iRet = doTryResume(pData); ENDtryResume BEGINbeginTransaction CODESTARTbeginTransaction dbgprintf("omfwd: beginTransaction\n"); ENDbeginTransaction BEGINdoAction char *psz; /* temporary buffering */ register unsigned l; int iMaxLine; # ifdef USE_NETZIP Bytef *out = NULL; /* for compression */ # endif CODESTARTdoAction CHKiRet(doTryResume(pData)); iMaxLine = glbl.GetMaxLine(); dbgprintf(" %s:%s/%s\n", pData->target, pData->port, pData->protocol == FORW_UDP ? "udp" : "tcp"); psz = (char*) ppString[0]; l = strlen((char*) psz); if((int) l > iMaxLine) l = iMaxLine; # ifdef USE_NETZIP /* Check if we should compress and, if so, do it. We also * check if the message is large enough to justify compression. * The smaller the message, the less likely is a gain in compression. * To save CPU cycles, we do not try to compress very small messages. * What "very small" means needs to be configured. Currently, it is * hard-coded but this may be changed to a config parameter. * rgerhards, 2006-11-30 */ if(pData->compressionMode == COMPRESS_SINGLE_MSG && (l > CONF_MIN_SIZE_FOR_COMPRESS)) { uLongf destLen = iMaxLine + iMaxLine/100 +12; /* recommended value from zlib doc */ uLong srcLen = l; int ret; CHKmalloc(out = (Bytef*) MALLOC(destLen)); out[0] = 'z'; out[1] = '\0'; ret = compress2((Bytef*) out+1, &destLen, (Bytef*) psz, srcLen, pData->compressionLevel); dbgprintf("Compressing message, length was %d now %d, return state %d.\n", l, (int) destLen, ret); if(ret != Z_OK) { /* if we fail, we complain, but only in debug mode * Otherwise, we are silent. In any case, we ignore the * failed compression and just sent the uncompressed * data, which is still valid. So this is probably the * best course of action. * rgerhards, 2006-11-30 */ dbgprintf("Compression failed, sending uncompressed message\n"); } else if(destLen+1 < l) { /* only use compression if there is a gain in using it! */ dbgprintf("there is gain in compression, so we do it\n"); psz = (char*) out; l = destLen + 1; /* take care for the "z" at message start! */ } ++destLen; } # endif if(pData->protocol == FORW_UDP) { /* forward via UDP */ CHKiRet(UDPSend(pData, psz, l)); } else { /* forward via TCP */ iRet = tcpclt.Send(pData->pTCPClt, pData, psz, l); if(iRet != RS_RET_OK && iRet != RS_RET_DEFER_COMMIT && iRet != RS_RET_PREVIOUS_COMMITTED) { /* error! */ dbgprintf("error forwarding via tcp, suspending\n"); DestructTCPInstanceData(pData); iRet = RS_RET_SUSPENDED; } } finalize_it: # ifdef USE_NETZIP free(out); /* is NULL if it was never used... */ # endif ENDdoAction BEGINendTransaction CODESTARTendTransaction dbgprintf("omfwd: endTransaction, offsSndBuf %u\n", pData->offsSndBuf); if(pData->offsSndBuf != 0) { iRet = TCPSendBuf(pData, pData->sndBuf, pData->offsSndBuf); pData->offsSndBuf = 0; } ENDendTransaction /* This function loads TCP support, if not already loaded. It will be called * during config processing. To server ressources, TCP support will only * be loaded if it actually is used. -- rgerhard, 2008-04-17 */ static rsRetVal loadTCPSupport(void) { DEFiRet; CHKiRet(objUse(netstrms, LM_NETSTRMS_FILENAME)); CHKiRet(objUse(netstrm, LM_NETSTRMS_FILENAME)); CHKiRet(objUse(tcpclt, LM_TCPCLT_FILENAME)); finalize_it: RETiRet; } /* initialize TCP structures (if necessary) after the instance has been * created. */ static rsRetVal initTCP(instanceData *pData) { DEFiRet; if(pData->protocol == FORW_TCP) { /* create our tcpclt */ CHKiRet(tcpclt.Construct(&pData->pTCPClt)); CHKiRet(tcpclt.SetResendLastOnRecon(pData->pTCPClt, pData->bResendLastOnRecon)); /* and set callbacks */ CHKiRet(tcpclt.SetSendInit(pData->pTCPClt, TCPSendInit)); CHKiRet(tcpclt.SetSendFrame(pData->pTCPClt, TCPSendFrame)); CHKiRet(tcpclt.SetSendPrepRetry(pData->pTCPClt, TCPSendPrepRetry)); CHKiRet(tcpclt.SetFraming(pData->pTCPClt, pData->tcp_framing)); CHKiRet(tcpclt.SetRebindInterval(pData->pTCPClt, pData->iRebindInterval)); pData->iStrmDrvrMode = cs.iStrmDrvrMode; if(cs.pszStrmDrvr != NULL) CHKmalloc(pData->pszStrmDrvr = (uchar*)strdup((char*)cs.pszStrmDrvr)); if(cs.pszStrmDrvrAuthMode != NULL) CHKmalloc(pData->pszStrmDrvrAuthMode = (uchar*)strdup((char*)cs.pszStrmDrvrAuthMode)); } finalize_it: RETiRet; } static inline void setInstParamDefaults(instanceData *pData) { pData->tplName = NULL; pData->protocol = FORW_UDP; pData->tcp_framing = TCP_FRAMING_OCTET_STUFFING; pData->pszStrmDrvr = NULL; pData->pszStrmDrvrAuthMode = NULL; pData->iStrmDrvrMode = 0; pData->iRebindInterval = 0; pData->bResendLastOnRecon = 0; pData->pPermPeers = NULL; pData->compressionLevel = 9; pData->compressionMode = COMPRESS_NEVER; } BEGINnewActInst struct cnfparamvals *pvals; uchar *tplToUse; char *cstr; int i; rsRetVal localRet; int complevel = -1; CODESTARTnewActInst DBGPRINTF("newActInst (omfwd)\n"); pvals = nvlstGetParams(lst, &actpblk, NULL); if(pvals == NULL) { errmsg.LogError(0, RS_RET_MISSING_CNFPARAMS, "omfwd: either the \"file\" or " "\"dynfile\" parameter must be given"); ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS); } if(Debug) { dbgprintf("action param blk in omfwd:\n"); cnfparamsPrint(&actpblk, pvals); } CHKiRet(createInstance(&pData)); setInstParamDefaults(pData); for(i = 0 ; i < actpblk.nParams ; ++i) { if(!pvals[i].bUsed) continue; if(!strcmp(actpblk.descr[i].name, "target")) { pData->target = es_str2cstr(pvals[i].val.d.estr, NULL); } else if(!strcmp(actpblk.descr[i].name, "port")) { pData->port = es_str2cstr(pvals[i].val.d.estr, NULL); } else if(!strcmp(actpblk.descr[i].name, "protocol")) { if(!es_strcasebufcmp(pvals[i].val.d.estr, (uchar*)"udp", 3)) { pData->protocol = FORW_UDP; } else if(!es_strcasebufcmp(pvals[i].val.d.estr, (uchar*)"tcp", 3)) { localRet = loadTCPSupport(); if(localRet != RS_RET_OK) { errmsg.LogError(0, localRet, "could not activate network stream modules for TCP " "(internal error %d) - are modules missing?", localRet); ABORT_FINALIZE(localRet); } pData->protocol = FORW_TCP; } else { uchar *str; str = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); errmsg.LogError(0, RS_RET_INVLD_PROTOCOL, "omfwd: invalid protocol \"%s\"", str); free(str); ABORT_FINALIZE(RS_RET_INVLD_PROTOCOL); } } else if(!strcmp(actpblk.descr[i].name, "tcp_framing")) { if(!es_strcasebufcmp(pvals[i].val.d.estr, (uchar*)"traditional", 11)) { pData->tcp_framing = TCP_FRAMING_OCTET_STUFFING; } else if(!es_strcasebufcmp(pvals[i].val.d.estr, (uchar*)"octet-counted", 13)) { pData->tcp_framing = TCP_FRAMING_OCTET_COUNTING; } else { uchar *str; str = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); errmsg.LogError(0, RS_RET_CNF_INVLD_FRAMING, "omfwd: invalid framing \"%s\"", str); free(str); ABORT_FINALIZE(RS_RET_CNF_INVLD_FRAMING ); } } else if(!strcmp(actpblk.descr[i].name, "rebindinterval")) { pData->iRebindInterval = (int) pvals[i].val.d.n; } else if(!strcmp(actpblk.descr[i].name, "streamdriver")) { pData->pszStrmDrvr = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); } else if(!strcmp(actpblk.descr[i].name, "streamdrivermode")) { pData->iStrmDrvrMode = pvals[i].val.d.n; } else if(!strcmp(actpblk.descr[i].name, "streamdriverauthmode")) { pData->pszStrmDrvrAuthMode = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); } else if(!strcmp(actpblk.descr[i].name, "streamdriverpermittedpeers")) { uchar *start, *str; uchar save; uchar *p; int lenStr; str = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); start = str; lenStr = ustrlen(start); /* we need length after '\0' has been dropped... */ while(lenStr > 0) { p = start; while(*p && *p != ',' && lenStr--) p++; if(*p == ',') { *p = '\0'; } save = *(p+1); /* we always have this, at least the \0 byte at EOS */ *(p+1) = '\0'; if(*start == '\0') { DBGPRINTF("omfwd: ignoring empty permitted peer\n"); } else { dbgprintf("omfwd: adding permitted peer: '%s'\n", start); CHKiRet(net.AddPermittedPeer(&(pData->pPermPeers), start)); } start = p+1; if(lenStr) --lenStr; *(p+1) = save; } free(str); } else if(!strcmp(actpblk.descr[i].name, "ziplevel")) { # ifdef USE_NETZIP complevel = pvals[i].val.d.n; if(complevel >= 0 && complevel <= 10) { pData->compressionLevel = complevel; pData->compressionMode = COMPRESS_SINGLE_MSG; } else { errmsg.LogError(0, NO_ERRCODE, "Invalid ziplevel %d specified in " "forwardig action - NOT turning on compression.", complevel); } # else errmsg.LogError(0, NO_ERRCODE, "Compression requested, but rsyslogd is not compiled " "with compression support - request ignored."); # endif /* #ifdef USE_NETZIP */ } else if(!strcmp(actpblk.descr[i].name, "resendlastmsgonreconnect")) { pData->bResendLastOnRecon = (int) pvals[i].val.d.n; } else if(!strcmp(actpblk.descr[i].name, "template")) { pData->tplName = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); } else if(!strcmp(actpblk.descr[i].name, "compression.mode")) { cstr = es_str2cstr(pvals[i].val.d.estr, NULL); if(!strcasecmp(cstr, "stream:always")) { pData->compressionMode = COMPRESS_STREAM_ALWAYS; } else if(!strcasecmp(cstr, "none")) { pData->compressionMode = COMPRESS_NEVER; } else if(!strcasecmp(cstr, "single")) { pData->compressionMode = COMPRESS_SINGLE_MSG; } else { errmsg.LogError(0, RS_RET_PARAM_ERROR, "omfwd: invalid value for 'compression.mode' " "parameter (given is '%s')", cstr); free(cstr); ABORT_FINALIZE(RS_RET_PARAM_ERROR); } free(cstr); } else { DBGPRINTF("omfwd: program error, non-handled " "param '%s'\n", actpblk.descr[i].name); } } if(complevel != -1) { pData->compressionLevel = complevel; if(pData->compressionMode == COMPRESS_NEVER) { /* to keep compatible with pre-7.3.11, only setting the * compresion level means old-style single-message mode. */ pData->compressionMode = COMPRESS_SINGLE_MSG; } } CODE_STD_STRING_REQUESTnewActInst(1) tplToUse = ustrdup((pData->tplName == NULL) ? getDfltTpl() : pData->tplName); CHKiRet(OMSRsetEntry(*ppOMSR, 0, tplToUse, OMSR_NO_RQD_TPL_OPTS)); CHKiRet(initTCP(pData)); CODE_STD_FINALIZERnewActInst cnfparamvalsDestruct(pvals, &actpblk); ENDnewActInst BEGINparseSelectorAct uchar *q; int i; rsRetVal localRet; struct addrinfo; TCPFRAMINGMODE tcp_framing = TCP_FRAMING_OCTET_STUFFING; CODESTARTparseSelectorAct CODE_STD_STRING_REQUESTparseSelectorAct(1) if(*p != '@') ABORT_FINALIZE(RS_RET_CONFLINE_UNPROCESSED); CHKiRet(createInstance(&pData)); ++p; /* eat '@' */ if(*p == '@') { /* indicator for TCP! */ localRet = loadTCPSupport(); if(localRet != RS_RET_OK) { errmsg.LogError(0, localRet, "could not activate network stream modules for TCP " "(internal error %d) - are modules missing?", localRet); ABORT_FINALIZE(localRet); } pData->protocol = FORW_TCP; ++p; /* eat this '@', too */ } else { pData->protocol = FORW_UDP; } /* we are now after the protocol indicator. Now check if we should * use compression. We begin to use a new option format for this: * @(option,option)host:port * The first option defined is "z[0..9]" where the digit indicates * the compression level. If it is not given, 9 (best compression) is * assumed. An example action statement might be: * @@(z5,o)127.0.0.1:1400 * Which means send via TCP with medium (5) compresion (z) to the local * host on port 1400. The '0' option means that octet-couting (as in * IETF I-D syslog-transport-tls) is to be used for framing (this option * applies to TCP-based syslog only and is ignored when specified with UDP). * That is not yet implemented. * rgerhards, 2006-12-07 * In order to support IPv6 addresses, we must introduce an extension to * the hostname. If it is in square brackets, whatever is in them is treated as * the hostname - without any exceptions ;) -- rgerhards, 2008-08-05 */ if(*p == '(') { /* at this position, it *must* be an option indicator */ do { ++p; /* eat '(' or ',' (depending on when called) */ /* check options */ if(*p == 'z') { /* compression */ # ifdef USE_NETZIP ++p; /* eat */ if(isdigit((int) *p)) { int iLevel; iLevel = *p - '0'; ++p; /* eat */ pData->compressionLevel = iLevel; pData->compressionMode = COMPRESS_SINGLE_MSG; } else { errmsg.LogError(0, NO_ERRCODE, "Invalid compression level '%c' specified in " "forwardig action - NOT turning on compression.", *p); } # else errmsg.LogError(0, NO_ERRCODE, "Compression requested, but rsyslogd is not compiled " "with compression support - request ignored."); # endif /* #ifdef USE_NETZIP */ } else if(*p == 'o') { /* octet-couting based TCP framing? */ ++p; /* eat */ /* no further options settable */ tcp_framing = TCP_FRAMING_OCTET_COUNTING; } else { /* invalid option! Just skip it... */ errmsg.LogError(0, NO_ERRCODE, "Invalid option %c in forwarding action - ignoring.", *p); ++p; /* eat invalid option */ } /* the option processing is done. We now do a generic skip * to either the next option or the end of the option * block. */ while(*p && *p != ')' && *p != ',') ++p; /* just skip it */ } while(*p && *p == ','); /* Attention: do.. while() */ if(*p == ')') ++p; /* eat terminator, on to next */ else /* we probably have end of string - leave it for the rest * of the code to handle it (but warn the user) */ errmsg.LogError(0, NO_ERRCODE, "Option block not terminated in forwarding action."); } /* extract the host first (we do a trick - we replace the ';' or ':' with a '\0') * now skip to port and then template name. rgerhards 2005-07-06 */ if(*p == '[') { /* everything is hostname upto ']' */ ++p; /* skip '[' */ for(q = p ; *p && *p != ']' ; ++p) /* JUST SKIP */; if(*p == ']') { *p = '\0'; /* trick to obtain hostname (later)! */ ++p; /* eat it */ } } else { /* traditional view of hostname */ for(q = p ; *p && *p != ';' && *p != ':' && *p != '#' ; ++p) /* JUST SKIP */; } pData->tcp_framing = tcp_framing; pData->port = NULL; if(*p == ':') { /* process port */ uchar * tmp; *p = '\0'; /* trick to obtain hostname (later)! */ tmp = ++p; for(i=0 ; *p && isdigit((int) *p) ; ++p, ++i) /* SKIP AND COUNT */; pData->port = MALLOC(i + 1); if(pData->port == NULL) { errmsg.LogError(0, NO_ERRCODE, "Could not get memory to store syslog forwarding port, " "using default port, results may not be what you intend\n"); /* we leave f_forw.port set to NULL, this is then handled below */ } else { memcpy(pData->port, tmp, i); *(pData->port + i) = '\0'; } } /* check if no port is set. If so, we use the IANA-assigned port of 514 */ if(pData->port == NULL) { CHKmalloc(pData->port = strdup("514")); } /* now skip to template */ while(*p && *p != ';' && *p != '#' && !isspace((int) *p)) ++p; /*JUST SKIP*/ if(*p == ';' || *p == '#' || isspace(*p)) { uchar cTmp = *p; *p = '\0'; /* trick to obtain hostname (later)! */ CHKmalloc(pData->target = strdup((char*) q)); *p = cTmp; } else { CHKmalloc(pData->target = strdup((char*) q)); } /* copy over config data as needed */ pData->iRebindInterval = (pData->protocol == FORW_TCP) ? cs.iTCPRebindInterval : cs.iUDPRebindInterval; /* process template */ CHKiRet(cflineParseTemplateName(&p, *ppOMSR, 0, OMSR_NO_RQD_TPL_OPTS, getDfltTpl())); if(pData->protocol == FORW_TCP) { pData->bResendLastOnRecon = cs.bResendLastOnRecon; pData->iStrmDrvrMode = cs.iStrmDrvrMode; if(cs.pszStrmDrvr != NULL) CHKmalloc(pData->pszStrmDrvr = (uchar*)strdup((char*)cs.pszStrmDrvr)); if(cs.pszStrmDrvrAuthMode != NULL) CHKmalloc(pData->pszStrmDrvrAuthMode = (uchar*)strdup((char*)cs.pszStrmDrvrAuthMode)); if(cs.pPermPeers != NULL) { pData->pPermPeers = cs.pPermPeers; cs.pPermPeers = NULL; } } CHKiRet(initTCP(pData)); CODE_STD_FINALIZERparseSelectorAct ENDparseSelectorAct /* a common function to free our configuration variables - used both on exit * and on $ResetConfig processing. -- rgerhards, 2008-05-16 */ static void freeConfigVars(void) { free(cs.pszStrmDrvr); cs.pszStrmDrvr = NULL; free(cs.pszStrmDrvrAuthMode); cs.pszStrmDrvrAuthMode = NULL; free(cs.pPermPeers); cs.pPermPeers = NULL; /* TODO: fix in older builds! */ } BEGINmodExit CODESTARTmodExit /* release what we no longer need */ objRelease(errmsg, CORE_COMPONENT); objRelease(glbl, CORE_COMPONENT); objRelease(net, LM_NET_FILENAME); objRelease(netstrm, LM_NETSTRMS_FILENAME); objRelease(netstrms, LM_NETSTRMS_FILENAME); objRelease(tcpclt, LM_TCPCLT_FILENAME); freeConfigVars(); ENDmodExit BEGINqueryEtryPt CODESTARTqueryEtryPt CODEqueryEtryPt_STD_OMOD_QUERIES CODEqueryEtryPt_STD_CONF2_QUERIES CODEqueryEtryPt_STD_CONF2_setModCnf_QUERIES CODEqueryEtryPt_STD_CONF2_OMOD_QUERIES CODEqueryEtryPt_TXIF_OMOD_QUERIES /* we support the transactional interface! */ ENDqueryEtryPt /* Reset config variables for this module to default values. * rgerhards, 2008-03-28 */ static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal) { freeConfigVars(); /* we now must reset all non-string values */ cs.iStrmDrvrMode = 0; cs.bResendLastOnRecon = 0; cs.iUDPRebindInterval = 0; cs.iTCPRebindInterval = 0; return RS_RET_OK; } BEGINmodInit(Fwd) CODESTARTmodInit INITLegCnfVars *ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */ CODEmodInit_QueryRegCFSLineHdlr CHKiRet(objUse(glbl, CORE_COMPONENT)); CHKiRet(objUse(errmsg, CORE_COMPONENT)); CHKiRet(objUse(net,LM_NET_FILENAME)); CHKiRet(regCfSysLineHdlr((uchar *)"actionforwarddefaulttemplate", 0, eCmdHdlrGetWord, setLegacyDfltTpl, NULL, NULL)); CHKiRet(regCfSysLineHdlr((uchar *)"actionsendtcprebindinterval", 0, eCmdHdlrInt, NULL, &cs.iTCPRebindInterval, NULL)); CHKiRet(regCfSysLineHdlr((uchar *)"actionsendudprebindinterval", 0, eCmdHdlrInt, NULL, &cs.iUDPRebindInterval, NULL)); CHKiRet(regCfSysLineHdlr((uchar *)"actionsendstreamdriver", 0, eCmdHdlrGetWord, NULL, &cs.pszStrmDrvr, NULL)); CHKiRet(regCfSysLineHdlr((uchar *)"actionsendstreamdrivermode", 0, eCmdHdlrInt, NULL, &cs.iStrmDrvrMode, NULL)); CHKiRet(regCfSysLineHdlr((uchar *)"actionsendstreamdriverauthmode", 0, eCmdHdlrGetWord, NULL, &cs.pszStrmDrvrAuthMode, NULL)); CHKiRet(regCfSysLineHdlr((uchar *)"actionsendstreamdriverpermittedpeer", 0, eCmdHdlrGetWord, setPermittedPeer, NULL, NULL)); CHKiRet(regCfSysLineHdlr((uchar *)"actionsendresendlastmsgonreconnect", 0, eCmdHdlrBinary, NULL, &cs.bResendLastOnRecon, NULL)); CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler, resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID)); ENDmodInit /* vim:set ai: */


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