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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 16:28:20 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 16:28:20 +0000
commitdcc721a95bef6f0d8e6d8775b8efe33e5aecd562 (patch)
tree66a2774cd0ee294d019efd71d2544c70f42b2842 /plugins/imudp
parentInitial commit. (diff)
downloadrsyslog-dcc721a95bef6f0d8e6d8775b8efe33e5aecd562.tar.xz
rsyslog-dcc721a95bef6f0d8e6d8775b8efe33e5aecd562.zip
Adding upstream version 8.2402.0.upstream/8.2402.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'plugins/imudp')
-rw-r--r--plugins/imudp/Makefile.am11
-rw-r--r--plugins/imudp/Makefile.in800
-rw-r--r--plugins/imudp/imudp.c1419
3 files changed, 2230 insertions, 0 deletions
diff --git a/plugins/imudp/Makefile.am b/plugins/imudp/Makefile.am
new file mode 100644
index 0000000..32d3d86
--- /dev/null
+++ b/plugins/imudp/Makefile.am
@@ -0,0 +1,11 @@
+pkglib_LTLIBRARIES = imudp.la
+
+imudp_la_SOURCES = imudp.c
+imudp_la_CPPFLAGS = -I$(top_srcdir) $(PTHREADS_CFLAGS) $(RSRT_CFLAGS)
+imudp_la_LDFLAGS = -module -avoid-version
+imudp_la_LIBADD = $(IMUDP_LIBS)
+
+if ENABLE_LIBLOGGING_STDLOG
+imudp_la_CPPFLAGS += $(LIBLOGGING_STDLOG_CFLAGS)
+imudp_la_LDFLAGS += $(LIBLOGGING_STDLOG_LIBS)
+endif
diff --git a/plugins/imudp/Makefile.in b/plugins/imudp/Makefile.in
new file mode 100644
index 0000000..5b94114
--- /dev/null
+++ b/plugins/imudp/Makefile.in
@@ -0,0 +1,800 @@
+# Makefile.in generated by automake 1.16.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2018 Free Software Foundation, Inc.
+
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+# with or without modifications, as long as this notice is preserved.
+
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+
+mostlyclean-libtool:
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+
+clean-libtool:
+ -rm -rf .libs _libs
+
+ID: $(am__tagged_files)
+ $(am__define_uniq_tagged_files); mkid -fID $$unique
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+
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+ else \
+ echo "$$sdir/$$i"; \
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+
+distclean-tags:
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+
+distdir: $(BUILT_SOURCES)
+ $(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
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+ test -f "$(distdir)/$$file" \
+ || cp -p $$d/$$file "$(distdir)/$$file" \
+ || exit 1; \
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+ fi
+mostlyclean-generic:
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+
+distclean-generic:
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+ -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
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+ @echo "it deletes files that may require special tools to rebuild."
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+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/plugins/imudp/imudp.c b/plugins/imudp/imudp.c
new file mode 100644
index 0000000..982f6c4
--- /dev/null
+++ b/plugins/imudp/imudp.c
@@ -0,0 +1,1419 @@
+/* imudp.c
+ * This is the implementation of the UDP input module.
+ *
+ * NOTE: read comments in module-template.h to understand how this file
+ * works!
+ *
+ * Copyright 2007-2018 Rainer Gerhards and Adiscon GmbH.
+ *
+ * This file is part of rsyslog.
+ *
+ * Rsyslog is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Rsyslog 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 Rsyslog. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * A copy of the GPL can be found in the file "COPYING" in this distribution.
+ */
+#include "config.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <pthread.h>
+#include <signal.h>
+#include <poll.h>
+#ifdef HAVE_SYS_EPOLL_H
+# include <sys/epoll.h>
+#endif
+#ifdef HAVE_SCHED_H
+# include <sched.h>
+#endif
+#ifdef HAVE_SYS_PRCTL_H
+# include <sys/prctl.h>
+#endif
+#include "rsyslog.h"
+#include "dirty.h"
+#include "net.h"
+#include "cfsysline.h"
+#include "module-template.h"
+#include "srUtils.h"
+#include "errmsg.h"
+#include "glbl.h"
+#include "msg.h"
+#include "parser.h"
+#include "datetime.h"
+#include "prop.h"
+#include "ruleset.h"
+#include "statsobj.h"
+#include "ratelimit.h"
+#include "unicode-helper.h"
+
+MODULE_TYPE_INPUT
+MODULE_TYPE_NOKEEP
+MODULE_CNFNAME("imudp")
+
+/* defines */
+#define MAX_WRKR_THREADS 32
+
+/* Module static data */
+DEF_IMOD_STATIC_DATA
+DEFobjCurrIf(glbl)
+DEFobjCurrIf(net)
+DEFobjCurrIf(datetime)
+DEFobjCurrIf(prop)
+DEFobjCurrIf(ruleset)
+DEFobjCurrIf(statsobj)
+
+
+static struct lstn_s {
+ struct lstn_s *next;
+ int sock; /* socket */
+ ruleset_t *pRuleset; /* bound ruleset */
+ prop_t *pInputName;
+ statsobj_t *stats; /* listener stats */
+ ratelimit_t *ratelimiter;
+ uchar *dfltTZ;
+ STATSCOUNTER_DEF(ctrSubmit, mutCtrSubmit)
+ STATSCOUNTER_DEF(ctrDisallowed, mutCtrDisallowed)
+} *lcnfRoot = NULL, *lcnfLast = NULL;
+
+
+static int bLegacyCnfModGlobalsPermitted;/* are legacy module-global config parameters permitted? */
+static int bDoACLCheck; /* are ACL checks neeed? Cached once immediately before listener startup */
+static int iMaxLine; /* maximum UDP message size supported */
+#define BATCH_SIZE_DFLT 32 /* do not overdo, has heavy toll on memory, especially with large msgs */
+#define TIME_REQUERY_DFLT 2
+#define SCHED_PRIO_UNSET -12345678 /* a value that indicates that the scheduling priority has not been set */
+/* config vars for legacy config system */
+static struct configSettings_s {
+ uchar *pszBindAddr; /* IP to bind socket to */
+ char *pszBindDevice; /* Device to bind socket to */
+ uchar *pszSchedPolicy; /* scheduling policy string */
+ uchar *pszBindRuleset; /* name of Ruleset to bind to */
+ int iSchedPrio; /* scheduling priority */
+ int iTimeRequery; /* how often is time to be queried inside tight recv loop? 0=always */
+} cs;
+
+struct instanceConf_s {
+ uchar *pszBindAddr; /* IP to bind socket to */
+ char *pszBindDevice; /* Device to bind socket to */
+ uchar *pszBindPort; /* Port to bind socket to */
+ uchar *pszBindRuleset; /* name of ruleset to bind to */
+ uchar *inputname;
+ ruleset_t *pBindRuleset; /* ruleset to bind listener to (use system default if unspecified) */
+ uchar *dfltTZ;
+ unsigned int ratelimitInterval;
+ unsigned int ratelimitBurst;
+ int rcvbuf; /* 0 means: do not set, keep OS default */
+ /* 0 means: IP_FREEBIND is disabled
+ 1 means: IP_FREEBIND enabled + warning disabled
+ 1+ means: IP+FREEBIND enabled + warning enabled */
+ int ipfreebind;
+ struct instanceConf_s *next;
+ sbool bAppendPortToInpname;
+};
+
+/* The following structure controls the worker threads. Global data is
+ * needed for their access.
+ */
+static struct wrkrInfo_s {
+ pthread_t tid; /* the worker's thread ID */
+ int id;
+ thrdInfo_t *pThrd;
+ statsobj_t *stats; /* worker thread stats */
+ STATSCOUNTER_DEF(ctrCall_recvmmsg, mutCtrCall_recvmmsg)
+ STATSCOUNTER_DEF(ctrCall_recvmsg, mutCtrCall_recvmsg)
+ STATSCOUNTER_DEF(ctrMsgsRcvd, mutCtrMsgsRcvd)
+ uchar *pRcvBuf; /* receive buffer (for a single packet) */
+# ifdef HAVE_RECVMMSG
+ struct sockaddr_storage *frominet;
+ struct mmsghdr *recvmsg_mmh;
+ struct iovec *recvmsg_iov;
+# endif
+} wrkrInfo[MAX_WRKR_THREADS];
+
+struct modConfData_s {
+ rsconf_t *pConf; /* our overall config object */
+ instanceConf_t *root, *tail;
+ uchar *pszSchedPolicy; /* scheduling policy string */
+ int iSchedPolicy; /* scheduling policy as SCHED_xxx */
+ int iSchedPrio; /* scheduling priority */
+ int iTimeRequery; /* how often is time to be queried inside tight recv loop? 0=always */
+ int batchSize; /* max nbr of input batch --> also recvmmsg() max count */
+ int8_t wrkrMax; /* max nbr of worker threads */
+ sbool configSetViaV2Method;
+ sbool bPreserveCase; /* preserves the case of fromhost; "off" by default */
+};
+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 load process */
+
+/* module-global parameters */
+static struct cnfparamdescr modpdescr[] = {
+ { "schedulingpolicy", eCmdHdlrGetWord, 0 },
+ { "schedulingpriority", eCmdHdlrInt, 0 },
+ { "batchsize", eCmdHdlrInt, 0 },
+ { "threads", eCmdHdlrPositiveInt, 0 },
+ { "timerequery", eCmdHdlrInt, 0 },
+ { "preservecase", eCmdHdlrBinary, 0 }
+};
+static struct cnfparamblk modpblk =
+ { CNFPARAMBLK_VERSION,
+ sizeof(modpdescr)/sizeof(struct cnfparamdescr),
+ modpdescr
+ };
+
+/* input instance parameters */
+static struct cnfparamdescr inppdescr[] = {
+ { "port", eCmdHdlrArray, CNFPARAM_REQUIRED }, /* legacy: InputTCPServerRun */
+ { "defaulttz", eCmdHdlrString, 0 },
+ { "inputname", eCmdHdlrGetWord, 0 },
+ { "inputname.appendport", eCmdHdlrBinary, 0 },
+ { "name", eCmdHdlrGetWord, 0 },
+ { "name.appendport", eCmdHdlrBinary, 0 },
+ { "address", eCmdHdlrString, 0 },
+ { "device", eCmdHdlrString, 0 },
+ { "ratelimit.interval", eCmdHdlrInt, 0 },
+ { "ratelimit.burst", eCmdHdlrInt, 0 },
+ { "rcvbufsize", eCmdHdlrSize, 0 },
+ { "ipfreebind", eCmdHdlrInt, 0 },
+ { "ruleset", eCmdHdlrString, 0 }
+};
+static struct cnfparamblk inppblk =
+ { CNFPARAMBLK_VERSION,
+ sizeof(inppdescr)/sizeof(struct cnfparamdescr),
+ inppdescr
+ };
+
+#include "im-helper.h" /* must be included AFTER the type definitions! */
+
+
+/* create input instance, set default parameters, and
+ * add it to the list of instances.
+ */
+static rsRetVal
+createInstance(instanceConf_t **pinst)
+{
+ instanceConf_t *inst;
+ DEFiRet;
+ CHKmalloc(inst = malloc(sizeof(instanceConf_t)));
+ inst->next = NULL;
+ inst->pBindRuleset = NULL;
+
+ inst->pszBindPort = NULL;
+ inst->pszBindAddr = NULL;
+ inst->pszBindDevice = NULL;
+ inst->pszBindRuleset = NULL;
+ inst->inputname = NULL;
+ inst->bAppendPortToInpname = 0;
+ inst->ratelimitBurst = 10000; /* arbitrary high limit */
+ inst->ratelimitInterval = 0; /* off */
+ inst->rcvbuf = 0;
+ inst->ipfreebind = IPFREEBIND_ENABLED_WITH_LOG;
+ inst->dfltTZ = NULL;
+
+ /* node created, let's add to config */
+ if(loadModConf->tail == NULL) {
+ loadModConf->tail = loadModConf->root = inst;
+ } else {
+ loadModConf->tail->next = inst;
+ loadModConf->tail = inst;
+ }
+
+ *pinst = inst;
+finalize_it:
+ RETiRet;
+}
+
+/* This function is called when a new listener instace shall be added to
+ * the current config object via the legacy config system. It just shuffles
+ * all parameters to the listener in-memory instance.
+ * rgerhards, 2011-05-04
+ */
+static rsRetVal addInstance(void __attribute__((unused)) *pVal, uchar *pNewVal)
+{
+ instanceConf_t *inst;
+ DEFiRet;
+
+ CHKiRet(createInstance(&inst));
+ CHKmalloc(inst->pszBindPort = ustrdup((pNewVal == NULL || *pNewVal == '\0')
+ ? (uchar*) "514" : pNewVal));
+ if((cs.pszBindAddr == NULL) || (cs.pszBindAddr[0] == '\0')) {
+ inst->pszBindAddr = NULL;
+ } else {
+ CHKmalloc(inst->pszBindAddr = ustrdup(cs.pszBindAddr));
+ }
+ if((cs.pszBindDevice == NULL) || (cs.pszBindDevice[0] == '\0')) {
+ inst->pszBindDevice= NULL;
+ } else {
+ CHKmalloc(inst->pszBindDevice = strdup(cs.pszBindDevice));
+ }
+ if((cs.pszBindRuleset == NULL) || (cs.pszBindRuleset[0] == '\0')) {
+ inst->pszBindRuleset = NULL;
+ } else {
+ CHKmalloc(inst->pszBindRuleset = ustrdup(cs.pszBindRuleset));
+ }
+
+finalize_it:
+ free(pNewVal);
+ RETiRet;
+}
+
+
+/* This function is called when a new listener shall be added. It takes
+ * the instance config description, tries to bind the socket and, if that
+ * succeeds, adds it to the list of existing listen sockets.
+ */
+static rsRetVal
+addListner(instanceConf_t *inst)
+{
+ DEFiRet;
+ uchar *bindAddr;
+ int *newSocks;
+ int iSrc;
+ struct lstn_s *newlcnfinfo;
+ uchar *bindName;
+ uchar *port;
+ uchar dispname[64], inpnameBuf[128];
+ uchar *inputname;
+
+ /* check which address to bind to. We could do this more compact, but have not
+ * done so in order to make the code more readable. -- rgerhards, 2007-12-27
+ */
+ if(inst->pszBindAddr == NULL)
+ bindAddr = NULL;
+ else if(inst->pszBindAddr[0] == '*' && inst->pszBindAddr[1] == '\0')
+ bindAddr = NULL;
+ else
+ bindAddr = inst->pszBindAddr;
+ bindName = (bindAddr == NULL) ? (uchar*)"*" : bindAddr;
+ port = (inst->pszBindPort == NULL || *inst->pszBindPort == '\0') ? (uchar*) "514" : inst->pszBindPort;
+
+ DBGPRINTF("Trying to open syslog UDP ports at %s:%s.\n", bindName, inst->pszBindPort);
+
+ newSocks = net.create_udp_socket(bindAddr, port, 1, inst->rcvbuf, 0, inst->ipfreebind, inst->pszBindDevice);
+ if(newSocks != NULL) {
+ /* we now need to add the new sockets to the existing set */
+ /* ready to copy */
+ for(iSrc = 1 ; iSrc <= newSocks[0] ; ++iSrc) {
+ struct sockaddr_in sa;
+ socklen_t salen = sizeof(sa);
+ const char *suffix;
+ CHKmalloc(newlcnfinfo = (struct lstn_s*) calloc(1, sizeof(struct lstn_s)));
+ newlcnfinfo->next = NULL;
+ newlcnfinfo->sock = newSocks[iSrc];
+ newlcnfinfo->pRuleset = inst->pBindRuleset;
+ newlcnfinfo->dfltTZ = inst->dfltTZ;
+ newlcnfinfo->ratelimiter = NULL;
+ /* query socket IPv4 vs IPv6 */
+ sa.sin_family = 0; /* just to keep CLANG static analyzer happy! */
+ if(getsockname(newlcnfinfo->sock, (struct sockaddr*) &sa, &salen) != 0) {
+ suffix = "error_getting_AF...";
+ } else {
+ if(sa.sin_family == AF_INET) {
+ suffix = "IPv4";
+ } else if(sa.sin_family == AF_INET6) {
+ suffix = "IPv6";
+ } else {
+ suffix = "AF_unknown";
+ }
+ }
+ if(inst->inputname == NULL) {
+ inputname = (uchar*)"imudp";
+ } else {
+ inputname = inst->inputname;
+ }
+ snprintf((char*)dispname, sizeof(dispname), "%s(%s/%s/%s)",
+ inputname, bindName, port, suffix);
+ dispname[sizeof(dispname)-1] = '\0'; /* just to be on the save side... */
+ CHKiRet(ratelimitNew(&newlcnfinfo->ratelimiter, (char*)dispname, NULL));
+ ratelimitSetLinuxLike(newlcnfinfo->ratelimiter, inst->ratelimitInterval,
+ inst->ratelimitBurst);
+ ratelimitSetThreadSafe(newlcnfinfo->ratelimiter);
+ if(inst->bAppendPortToInpname) {
+ snprintf((char*)inpnameBuf, sizeof(inpnameBuf), "%s%s",
+ inputname, port);
+ inpnameBuf[sizeof(inpnameBuf)-1] = '\0';
+ inputname = inpnameBuf;
+ }
+ CHKiRet(prop.Construct(&newlcnfinfo->pInputName));
+ CHKiRet(prop.SetString(newlcnfinfo->pInputName,
+ inputname, ustrlen(inputname)));
+ CHKiRet(prop.ConstructFinalize(newlcnfinfo->pInputName));
+ /* support statistics gathering */
+ CHKiRet(statsobj.Construct(&(newlcnfinfo->stats)));
+ CHKiRet(statsobj.SetName(newlcnfinfo->stats, dispname));
+ CHKiRet(statsobj.SetOrigin(newlcnfinfo->stats, (uchar*)"imudp"));
+ STATSCOUNTER_INIT(newlcnfinfo->ctrSubmit, newlcnfinfo->mutCtrSubmit);
+ CHKiRet(statsobj.AddCounter(newlcnfinfo->stats, UCHAR_CONSTANT("submitted"),
+ ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(newlcnfinfo->ctrSubmit)));
+ STATSCOUNTER_INIT(newlcnfinfo->ctrDisallowed, newlcnfinfo->mutCtrDisallowed);
+ CHKiRet(statsobj.AddCounter(newlcnfinfo->stats, UCHAR_CONSTANT("disallowed"),
+ ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(newlcnfinfo->ctrDisallowed)));
+ CHKiRet(statsobj.ConstructFinalize(newlcnfinfo->stats));
+ /* link to list. Order must be preserved to take care for
+ * conflicting matches.
+ */
+ if(lcnfRoot == NULL)
+ lcnfRoot = newlcnfinfo;
+ if(lcnfLast == NULL)
+ lcnfLast = newlcnfinfo;
+ else {
+ lcnfLast->next = newlcnfinfo;
+ lcnfLast = newlcnfinfo;
+ }
+ }
+ } else {
+ LogError(0, NO_ERRCODE, "imudp: Could not create udp listener,"
+ " ignoring port %s bind-address %s.",
+ port, bindAddr);
+ }
+
+finalize_it:
+ if(iRet != RS_RET_OK) {
+ if(newlcnfinfo != NULL) {
+ if(newlcnfinfo->ratelimiter != NULL)
+ ratelimitDestruct(newlcnfinfo->ratelimiter);
+ if(newlcnfinfo->pInputName != NULL)
+ prop.Destruct(&newlcnfinfo->pInputName);
+ if(newlcnfinfo->stats != NULL)
+ statsobj.Destruct(&newlcnfinfo->stats);
+ free(newlcnfinfo);
+ }
+ /* close the rest of the open sockets as there's
+ nowhere to put them */
+ for(; iSrc <= newSocks[0]; iSrc++) {
+ close(newSocks[iSrc]);
+ }
+ }
+
+ free(newSocks);
+ RETiRet;
+}
+
+
+static inline void
+std_checkRuleset_genErrMsg(__attribute__((unused)) modConfData_t *modConf, instanceConf_t *inst)
+{
+ LogError(0, NO_ERRCODE, "imudp: ruleset '%s' for %s:%s not found - "
+ "using default ruleset instead", inst->pszBindRuleset,
+ inst->pszBindAddr == NULL ? "*" : (char*) inst->pszBindAddr,
+ inst->pszBindPort);
+}
+
+
+/* This function processes received data. It provides unified handling
+ * in cases where recvmmsg() is available and not.
+ */
+static rsRetVal
+processPacket(struct lstn_s *lstn, struct sockaddr_storage *frominetPrev, int *pbIsPermitted,
+ uchar *rcvBuf, ssize_t lenRcvBuf, struct syslogTime *stTime, time_t ttGenTime,
+ struct sockaddr_storage *frominet, socklen_t socklen, multi_submit_t *multiSub)
+{
+ DEFiRet;
+ smsg_t *pMsg = NULL;
+
+ if(lenRcvBuf == 0)
+ FINALIZE; /* this looks a bit strange, but practice shows it happens... */
+
+ /* if we reach this point, we had a good receive and can process the packet received */
+ /* check if we have a different sender than before, if so, we need to query some new values */
+ if(bDoACLCheck) {
+ socklen = sizeof(struct sockaddr_storage);
+ if(net.CmpHost(frominet, frominetPrev, socklen) != 0) {
+ memcpy(frominetPrev, frominet, socklen); /* update cache indicator */
+ /* Here we check if a host is permitted to send us syslog messages. If it isn't,
+ * we do not further process the message but log a warning (if we are
+ * configured to do this). However, if the check would require name resolution,
+ * it is postponed to the main queue. See also my blog post at
+ * http://blog.gerhards.net/2009/11/acls-imudp-and-accepting-messages.html
+ * rgerhards, 2009-11-16
+ */
+ *pbIsPermitted = net.isAllowedSender2((uchar*)"UDP",
+ (struct sockaddr *)frominet, "", 0);
+
+ if(*pbIsPermitted == 0) {
+ DBGPRINTF("msg is not from an allowed sender\n");
+ STATSCOUNTER_INC(lstn->ctrDisallowed, lstn->mutCtrDisallowed);
+ if(glbl.GetOptionDisallowWarning(runModConf->pConf)) {
+ LogError(0, NO_ERRCODE,
+ "imudp: UDP message from disallowed sender discarded");
+ }
+ }
+ }
+ } else {
+ *pbIsPermitted = 1; /* no check -> everything permitted */
+ }
+
+ DBGPRINTF("recv(%d,%d),acl:%d,msg:%.*s\n", lstn->sock, (int) lenRcvBuf, *pbIsPermitted,
+ (int)lenRcvBuf, rcvBuf);
+
+ if(*pbIsPermitted != 0) {
+ /* we now create our own message object and submit it to the queue */
+ CHKiRet(msgConstructWithTime(&pMsg, stTime, ttGenTime));
+ MsgSetRawMsg(pMsg, (char*)rcvBuf, lenRcvBuf);
+ MsgSetInputName(pMsg, lstn->pInputName);
+ MsgSetRuleset(pMsg, lstn->pRuleset);
+ MsgSetFlowControlType(pMsg, eFLOWCTL_NO_DELAY);
+ if(lstn->dfltTZ != NULL)
+ MsgSetDfltTZ(pMsg, (char*) lstn->dfltTZ);
+ pMsg->msgFlags = NEEDS_PARSING | PARSE_HOSTNAME | NEEDS_DNSRESOL;
+ if(*pbIsPermitted == 2) {
+ pMsg->msgFlags |= NEEDS_ACLCHK_U; /* request ACL check after resolution */
+ }
+ if(runModConf->bPreserveCase) {
+ pMsg->msgFlags |= PRESERVE_CASE; /* preserve case of fromhost */
+ }
+ CHKiRet(msgSetFromSockinfo(pMsg, frominet));
+ CHKiRet(ratelimitAddMsg(lstn->ratelimiter, multiSub, pMsg));
+ STATSCOUNTER_INC(lstn->ctrSubmit, lstn->mutCtrSubmit);
+ }
+
+finalize_it:
+ if(iRet != RS_RET_OK) {
+ if(pMsg != NULL && iRet != RS_RET_DISCARDMSG) {
+ msgDestruct(&pMsg);
+ }
+ }
+
+ RETiRet;
+}
+
+
+
+
+/* The following "two" functions are helpers to runInput. Actually, it is
+ * just one function. Depending on whether or not we have recvmmsg(),
+ * an appropriate version is compiled (as such we need to maintain both!).
+ */
+#ifdef HAVE_RECVMMSG
+static rsRetVal
+processSocket(struct wrkrInfo_s *pWrkr, struct lstn_s *lstn, struct sockaddr_storage *frominetPrev,
+int *pbIsPermitted)
+{
+ DEFiRet;
+ int iNbrTimeUsed;
+ time_t ttGenTime = 0; /* to avoid clang static analyzer false positive */
+ /* note: we do never use this time, because we always get a
+ * requery below on first loop iteration */
+ struct syslogTime stTime;
+ char errStr[1024];
+ smsg_t *pMsgs[CONF_NUM_MULTISUB];
+ multi_submit_t multiSub;
+ int nelem;
+ int i;
+
+ multiSub.ppMsgs = pMsgs;
+ multiSub.maxElem = CONF_NUM_MULTISUB;
+ multiSub.nElem = 0;
+ iNbrTimeUsed = 0;
+ while(1) { /* loop is terminated if we have a "bad" receive, done below in the body */
+ if(pWrkr->pThrd->bShallStop == RSTRUE)
+ ABORT_FINALIZE(RS_RET_FORCE_TERM);
+ memset(pWrkr->recvmsg_iov, 0, runModConf->batchSize * sizeof(struct iovec));
+ memset(pWrkr->recvmsg_mmh, 0, runModConf->batchSize * sizeof(struct mmsghdr));
+ for(i = 0 ; i < runModConf->batchSize ; ++i) {
+ pWrkr->recvmsg_iov[i].iov_base = pWrkr->pRcvBuf+(i*(iMaxLine+1));
+ pWrkr->recvmsg_iov[i].iov_len = iMaxLine;
+ pWrkr->recvmsg_mmh[i].msg_hdr.msg_namelen = sizeof(struct sockaddr_storage);
+ pWrkr->recvmsg_mmh[i].msg_hdr.msg_name = &(pWrkr->frominet[i]);
+ pWrkr->recvmsg_mmh[i].msg_hdr.msg_iov = &(pWrkr->recvmsg_iov[i]);
+ pWrkr->recvmsg_mmh[i].msg_hdr.msg_iovlen = 1;
+ }
+ nelem = recvmmsg(lstn->sock, pWrkr->recvmsg_mmh, runModConf->batchSize, 0, NULL);
+ STATSCOUNTER_INC(pWrkr->ctrCall_recvmmsg, pWrkr->mutCtrCall_recvmmsg);
+ DBGPRINTF("imudp: recvmmsg returned %d\n", nelem);
+ if(nelem < 0 && errno == ENOSYS) {
+ /* be careful: some versions of valgrind do not support recvmmsg()! */
+ DBGPRINTF("imudp: error ENOSYS on call to recvmmsg() - fall back to recvmsg\n");
+ nelem = recvmsg(lstn->sock, &(pWrkr->recvmsg_mmh[0].msg_hdr), 0);
+ STATSCOUNTER_INC(pWrkr->ctrCall_recvmsg, pWrkr->mutCtrCall_recvmsg);
+ if(nelem >= 0) {
+ pWrkr->recvmsg_mmh[0].msg_len = nelem;
+ nelem = 1;
+ }
+ }
+ if(nelem < 0) {
+ if(errno != EINTR && errno != EAGAIN) {
+ rs_strerror_r(errno, errStr, sizeof(errStr));
+ DBGPRINTF("INET socket error: %d = %s.\n", errno, errStr);
+ LogError(errno, NO_ERRCODE, "imudp: error receiving on socket: %s", errStr);
+ }
+ ABORT_FINALIZE(RS_RET_ERR);
+ // this most often is NOT an error, state is not checked by caller!
+ }
+
+ if((runModConf->iTimeRequery == 0) || (iNbrTimeUsed++ % runModConf->iTimeRequery) == 0) {
+ datetime.getCurrTime(&stTime, &ttGenTime, TIME_IN_LOCALTIME);
+ }
+
+ pWrkr->ctrMsgsRcvd += nelem;
+ for(i = 0 ; i < nelem ; ++i) {
+ processPacket(lstn, frominetPrev, pbIsPermitted,
+ pWrkr->recvmsg_mmh[i].msg_hdr.msg_iov->iov_base,
+ pWrkr->recvmsg_mmh[i].msg_len, &stTime, ttGenTime, &(pWrkr->frominet[i]),
+ pWrkr->recvmsg_mmh[i].msg_hdr.msg_namelen, &multiSub);
+ }
+ }
+
+finalize_it:
+ multiSubmitFlush(&multiSub);
+ RETiRet;
+}
+#else /* we do not have recvmmsg() */
+/* This function is a helper to runInput. I have extracted it
+ * from the main loop just so that we do not have that large amount of code
+ * in a single place. This function takes a socket and pulls messages from
+ * it until the socket does not have any more waiting.
+ * rgerhards, 2008-01-08
+ * We try to read from the file descriptor until there
+ * is no more data. This is done in the hope to get better performance
+ * out of the system. However, this also means that a descriptor
+ * monopolizes processing while it contains data. This can lead to
+ * data loss in other descriptors. However, if the system is incapable of
+ * handling the workload, we will loss data in any case. So it doesn't really
+ * matter where the actual loss occurs - it is always random, because we depend
+ * on scheduling order. -- rgerhards, 2008-10-02
+ */
+static rsRetVal
+processSocket(struct wrkrInfo_s *pWrkr, struct lstn_s *lstn, struct sockaddr_storage *frominetPrev,
+int *pbIsPermitted)
+{
+ int iNbrTimeUsed;
+ time_t ttGenTime;
+ struct syslogTime stTime;
+ ssize_t lenRcvBuf;
+ struct sockaddr_storage frominet;
+ multi_submit_t multiSub;
+ smsg_t *pMsgs[CONF_NUM_MULTISUB];
+ char errStr[1024];
+ struct msghdr mh;
+ struct iovec iov[1];
+ DEFiRet;
+
+ multiSub.ppMsgs = pMsgs;
+ multiSub.maxElem = CONF_NUM_MULTISUB;
+ multiSub.nElem = 0;
+ iNbrTimeUsed = 0;
+ while(1) { /* loop is terminated if we have a bad receive, done below in the body */
+ if(pWrkr->pThrd->bShallStop == RSTRUE)
+ ABORT_FINALIZE(RS_RET_FORCE_TERM);
+ memset(iov, 0, sizeof(iov));
+ iov[0].iov_base = pWrkr->pRcvBuf;
+ iov[0].iov_len = iMaxLine;
+ memset(&mh, 0, sizeof(mh));
+ mh.msg_name = &frominet;
+ mh.msg_namelen = sizeof(struct sockaddr_storage);
+ mh.msg_iov = iov;
+ mh.msg_iovlen = 1;
+ lenRcvBuf = recvmsg(lstn->sock, &mh, 0);
+ STATSCOUNTER_INC(pWrkr->ctrCall_recvmsg, pWrkr->mutCtrCall_recvmsg);
+ if(lenRcvBuf < 0) {
+ if(errno != EINTR && errno != EAGAIN) {
+ rs_strerror_r(errno, errStr, sizeof(errStr));
+ DBGPRINTF("INET socket error: %d = %s.\n", errno, errStr);
+ LogError(errno, NO_ERRCODE, "imudp: error receiving on socket: %s", errStr);
+ }
+ ABORT_FINALIZE(RS_RET_ERR);
+ // this most often is NOT an error, state is not checked by caller!
+ }
+
+ ++pWrkr->ctrMsgsRcvd;
+ if((runModConf->iTimeRequery == 0) || (iNbrTimeUsed++ % runModConf->iTimeRequery) == 0) {
+ datetime.getCurrTime(&stTime, &ttGenTime, TIME_IN_LOCALTIME);
+ }
+
+ CHKiRet(processPacket(lstn, frominetPrev, pbIsPermitted, pWrkr->pRcvBuf, lenRcvBuf, &stTime,
+ ttGenTime, &frominet, mh.msg_namelen, &multiSub));
+ }
+
+
+finalize_it:
+ multiSubmitFlush(&multiSub);
+ RETiRet;
+}
+#endif /* #ifdef HAVE_RECVMMSG */
+
+
+/* check configured scheduling priority.
+ * Precondition: iSchedPolicy must have been set
+ */
+static rsRetVal
+checkSchedulingPriority(modConfData_t *modConf)
+{
+ DEFiRet;
+
+#ifdef HAVE_SCHED_GET_PRIORITY_MAX
+ if( modConf->iSchedPrio < sched_get_priority_min(modConf->iSchedPolicy)
+ || modConf->iSchedPrio > sched_get_priority_max(modConf->iSchedPolicy)) {
+ LogError(0, NO_ERRCODE,
+ "imudp: scheduling priority %d out of range (%d - %d)"
+ " for scheduling policy '%s' - ignoring settings",
+ modConf->iSchedPrio,
+ sched_get_priority_min(modConf->iSchedPolicy),
+ sched_get_priority_max(modConf->iSchedPolicy),
+ modConf->pszSchedPolicy);
+ ABORT_FINALIZE(RS_RET_VALIDATION_RUN);
+ }
+finalize_it:
+#endif
+ RETiRet;
+}
+
+
+/* check scheduling policy string and, if valid, set its
+ * numeric equivalent in current load config
+ */
+static rsRetVal
+checkSchedulingPolicy(modConfData_t *modConf)
+{
+ DEFiRet;
+
+ if (0) { /* trick to use conditional compilation */
+#ifdef SCHED_FIFO
+ } else if (!strcasecmp((char*)modConf->pszSchedPolicy, "fifo")) {
+ modConf->iSchedPolicy = SCHED_FIFO;
+#endif
+#ifdef SCHED_RR
+ } else if (!strcasecmp((char*)modConf->pszSchedPolicy, "rr")) {
+ modConf->iSchedPolicy = SCHED_RR;
+#endif
+#ifdef SCHED_OTHER
+ } else if (!strcasecmp((char*)modConf->pszSchedPolicy, "other")) {
+ modConf->iSchedPolicy = SCHED_OTHER;
+#endif
+ } else {
+ LogError(errno, NO_ERRCODE,
+ "imudp: invalid scheduling policy '%s' "
+ "- ignoring setting", modConf->pszSchedPolicy);
+ ABORT_FINALIZE(RS_RET_ERR_SCHED_PARAMS);
+ }
+finalize_it:
+ RETiRet;
+}
+
+/* checks scheduling parameters during config check phase */
+static rsRetVal
+checkSchedParam(modConfData_t *modConf)
+{
+ DEFiRet;
+
+ if(modConf->pszSchedPolicy != NULL && modConf->iSchedPrio == SCHED_PRIO_UNSET) {
+ LogError(0, RS_RET_ERR_SCHED_PARAMS,
+ "imudp: scheduling policy set, but without priority - ignoring settings");
+ ABORT_FINALIZE(RS_RET_ERR_SCHED_PARAMS);
+ } else if(modConf->pszSchedPolicy == NULL && modConf->iSchedPrio != SCHED_PRIO_UNSET) {
+ LogError(0, RS_RET_ERR_SCHED_PARAMS,
+ "imudp: scheduling priority set, but without policy - ignoring settings");
+ ABORT_FINALIZE(RS_RET_ERR_SCHED_PARAMS);
+ } else if(modConf->pszSchedPolicy != NULL && modConf->iSchedPrio != SCHED_PRIO_UNSET) {
+ /* we have parameters set, so check them */
+ CHKiRet(checkSchedulingPolicy(modConf));
+ CHKiRet(checkSchedulingPriority(modConf));
+ } else { /* nothing set */
+ modConf->iSchedPrio = SCHED_PRIO_UNSET; /* prevents doing the activation call */
+ }
+#ifndef HAVE_PTHREAD_SETSCHEDPARAM
+ LogError(0, NO_ERRCODE,
+ "imudp: cannot set thread scheduling policy, "
+ "pthread_setschedparam() not available");
+ ABORT_FINALIZE(RS_RET_ERR_SCHED_PARAMS);
+#endif
+
+finalize_it:
+ if(iRet != RS_RET_OK)
+ modConf->iSchedPrio = SCHED_PRIO_UNSET; /* prevents doing the activation call */
+
+ RETiRet;
+}
+
+/* set the configured scheduling policy (if possible) */
+static rsRetVal
+setSchedParams(modConfData_t *modConf)
+{
+ DEFiRet;
+
+# ifdef HAVE_PTHREAD_SETSCHEDPARAM
+ int err;
+ struct sched_param sparam;
+
+ if(modConf->iSchedPrio == SCHED_PRIO_UNSET)
+ FINALIZE;
+
+ memset(&sparam, 0, sizeof sparam);
+ sparam.sched_priority = modConf->iSchedPrio;
+ dbgprintf("imudp trying to set sched policy to '%s', prio %d\n",
+ modConf->pszSchedPolicy, modConf->iSchedPrio);
+ err = pthread_setschedparam(pthread_self(), modConf->iSchedPolicy, &sparam);
+ if(err != 0) {
+ LogError(err, NO_ERRCODE, "imudp: pthread_setschedparam() failed - ignoring");
+ }
+finalize_it:
+# endif
+
+ RETiRet;
+}
+
+
+/* This function implements the main reception loop. Depending on the environment,
+ * we either use the traditional (but slower) select() or the Linux-specific epoll()
+ * interface. ./configure settings control which one is used.
+ * rgerhards, 2009-09-09
+ */
+#if defined(HAVE_EPOLL_CREATE1) || defined(HAVE_EPOLL_CREATE)
+#define NUM_EPOLL_EVENTS 10
+static rsRetVal
+rcvMainLoop(struct wrkrInfo_s *const __restrict__ pWrkr)
+{
+ DEFiRet;
+ int nfds;
+ int efd;
+ int i;
+ struct sockaddr_storage frominetPrev;
+ int bIsPermitted;
+ struct epoll_event *udpEPollEvt = NULL;
+ struct epoll_event currEvt[NUM_EPOLL_EVENTS];
+ char errStr[1024];
+ struct lstn_s *lstn;
+ int nLstn;
+
+ /* start "name caching" algo by making sure the previous system indicator
+ * is invalidated.
+ */
+ bIsPermitted = 0;
+ memset(&frominetPrev, 0, sizeof(frominetPrev));
+
+ /* count num listeners -- do it here in order to avoid inconsistency */
+ nLstn = 0;
+ for(lstn = lcnfRoot ; lstn != NULL ; lstn = lstn->next)
+ ++nLstn;
+
+ if(nLstn == 0) {
+ LogError(errno, RS_RET_ERR,
+ "imudp error: we have 0 listeners, terminating"
+ "worker thread");
+ ABORT_FINALIZE(RS_RET_ERR);
+ }
+ CHKmalloc(udpEPollEvt = calloc(nLstn, sizeof(struct epoll_event)));
+
+#if defined(EPOLL_CLOEXEC) && defined(HAVE_EPOLL_CREATE1)
+ DBGPRINTF("imudp uses epoll_create1()\n");
+ efd = epoll_create1(EPOLL_CLOEXEC);
+ if(efd < 0 && errno == ENOSYS)
+#endif
+ {
+ DBGPRINTF("imudp uses epoll_create()\n");
+ efd = epoll_create(NUM_EPOLL_EVENTS);
+ }
+
+ if(efd < 0) {
+ DBGPRINTF("epoll_create1() could not create fd\n");
+ ABORT_FINALIZE(RS_RET_IO_ERROR);
+ }
+
+ /* fill the epoll set - we need to do this only once, as the set
+ * can not change dyamically.
+ */
+ i = 0;
+ for(lstn = lcnfRoot ; lstn != NULL ; lstn = lstn->next) {
+ if(lstn->sock != -1) {
+ udpEPollEvt[i].events = EPOLLIN | EPOLLET;
+ udpEPollEvt[i].data.ptr = lstn;
+ if(epoll_ctl(efd, EPOLL_CTL_ADD, lstn->sock, &(udpEPollEvt[i])) < 0) {
+ rs_strerror_r(errno, errStr, sizeof(errStr));
+ LogError(errno, NO_ERRCODE, "epoll_ctrl failed on fd %d with %s\n",
+ lstn->sock, errStr);
+ }
+ }
+ i++;
+ }
+
+ while(1) {
+ /* wait for io to become ready */
+ nfds = epoll_wait(efd, currEvt, NUM_EPOLL_EVENTS, -1);
+ DBGPRINTF("imudp: epoll_wait() returned with %d fds\n", nfds);
+
+ if(pWrkr->pThrd->bShallStop == RSTRUE)
+ break; /* terminate input! */
+
+ for(i = 0 ; i < nfds ; ++i) {
+ processSocket(pWrkr, currEvt[i].data.ptr, &frominetPrev, &bIsPermitted);
+ }
+ if(pWrkr->pThrd->bShallStop == RSTRUE)
+ break; /* terminate input! */
+ }
+
+finalize_it:
+ if(udpEPollEvt != NULL)
+ free(udpEPollEvt);
+
+ RETiRet;
+}
+#else /* #if HAVE_EPOLL_CREATE1 */
+/* this is the code for the select() interface */
+static rsRetVal ATTR_NONNULL()
+rcvMainLoop(struct wrkrInfo_s *const __restrict__ pWrkr)
+{
+ DEFiRet;
+ int nfds;
+ struct sockaddr_storage frominetPrev;
+ int bIsPermitted;
+ int i = 0;
+ struct lstn_s *lstn;
+
+ DBGPRINTF("imudp uses poll() [ex-select]\n");
+ /* start "name caching" algo by making sure the previous system indicator
+ * is invalidated. */
+ bIsPermitted = 0;
+ memset(&frominetPrev, 0, sizeof(frominetPrev));
+
+ /* setup poll() subsystem */
+ int nfd = 0;
+ for(lstn = lcnfRoot ; lstn != NULL ; lstn = lstn->next) {
+ if(lstn->sock != -1) {
+ if(Debug) {
+ net.debugListenInfo(lstn->sock, (char*)"UDP");
+ }
+ ++nfd;
+ }
+ }
+ struct pollfd *const pollfds = calloc(nfd, sizeof(struct pollfd));
+ CHKmalloc(pollfds);
+
+ for(lstn = lcnfRoot ; lstn != NULL ; lstn = lstn->next) {
+ assert(i < nfd);
+ if (lstn->sock != -1) {
+ pollfds[i].fd = lstn->sock;
+ pollfds[i].events = POLLIN;
+ ++i;
+ }
+ }
+
+ while(1) {
+ DBGPRINTF("--------imudp calling poll() on %d fds\n", nfd);
+ nfds = poll(pollfds, nfd, -1);
+ if(glbl.GetGlobalInputTermState() == 1)
+ break; /* terminate input! */
+
+ if(nfds < 0) {
+ if(errno == EINTR) {
+ DBGPRINTF("imudp: EINTR occurred\n");
+ } else {
+ LogMsg(errno, RS_RET_POLL_ERR, LOG_WARNING, "imudp: poll "
+ "system call failed, may cause further troubles");
+ }
+ nfds = 0;
+ }
+
+ i = 0;
+ for(lstn = lcnfRoot ; nfds && lstn != NULL ; lstn = lstn->next) {
+ assert(i < nfd);
+ if(lstn->sock != -1) {
+ if(glbl.GetGlobalInputTermState() == 1)
+ ABORT_FINALIZE(RS_RET_FORCE_TERM); /* terminate input! */
+ if(pollfds[i].revents & POLLIN) {
+ processSocket(pWrkr, lstn, &frominetPrev, &bIsPermitted);
+ --nfds;
+ }
+ ++i;
+ }
+ }
+ /* end of a run, back to loop for next recv() */
+ }
+
+finalize_it:
+ RETiRet;
+}
+#endif /* #if HAVE_EPOLL_CREATE1 */
+
+
+static rsRetVal
+createListner(es_str_t *port, struct cnfparamvals *pvals)
+{
+ instanceConf_t *inst;
+ int i;
+ int bAppendPortUsed = 0;
+ DEFiRet;
+
+ CHKiRet(createInstance(&inst));
+ inst->pszBindPort = (uchar*)es_str2cstr(port, NULL);
+ for(i = 0 ; i < inppblk.nParams ; ++i) {
+ if(!pvals[i].bUsed)
+ continue;
+ if(!strcmp(inppblk.descr[i].name, "port")) {
+ continue; /* array, handled by caller */
+ } else if(!strcmp(inppblk.descr[i].name, "name")) {
+ if(inst->inputname != NULL) {
+ LogError(0, RS_RET_INVALID_PARAMS, "imudp: name and inputname "
+ "parameter specified - only one can be used");
+ ABORT_FINALIZE(RS_RET_INVALID_PARAMS);
+ }
+ inst->inputname = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+ } else if(!strcmp(inppblk.descr[i].name, "name.appendport")) {
+ if(bAppendPortUsed) {
+ LogError(0, RS_RET_INVALID_PARAMS, "imudp: name.appendport and "
+ "inputname.appendport parameter specified - only one can be used");
+ ABORT_FINALIZE(RS_RET_INVALID_PARAMS);
+ }
+ inst->bAppendPortToInpname = (int) pvals[i].val.d.n;
+ bAppendPortUsed = 1;
+ } else if(!strcmp(inppblk.descr[i].name, "inputname")) {
+ LogError(0, RS_RET_DEPRECATED , "imudp: deprecated parameter inputname "
+ "used. Suggest to use name instead");
+ if(inst->inputname != NULL) {
+ LogError(0, RS_RET_INVALID_PARAMS, "imudp: name and inputname "
+ "parameter specified - only one can be used");
+ ABORT_FINALIZE(RS_RET_INVALID_PARAMS);
+ }
+ inst->inputname = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+ } else if(!strcmp(inppblk.descr[i].name, "inputname.appendport")) {
+ LogError(0, RS_RET_DEPRECATED , "imudp: deprecated parameter inputname.appendport "
+ "used. Suggest to use name.appendport instead");
+ if(bAppendPortUsed) {
+ LogError(0, RS_RET_INVALID_PARAMS, "imudp: name.appendport and "
+ "inputname.appendport parameter specified - only one can be used");
+ ABORT_FINALIZE(RS_RET_INVALID_PARAMS);
+ }
+ bAppendPortUsed = 1;
+ inst->bAppendPortToInpname = (int) pvals[i].val.d.n;
+ } else if(!strcmp(inppblk.descr[i].name, "defaulttz")) {
+ inst->dfltTZ = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+ } else if(!strcmp(inppblk.descr[i].name, "address")) {
+ inst->pszBindAddr = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+ } else if(!strcmp(inppblk.descr[i].name, "device")) {
+ inst->pszBindDevice = (char*)es_str2cstr(pvals[i].val.d.estr, NULL);
+ } else if(!strcmp(inppblk.descr[i].name, "ruleset")) {
+ inst->pszBindRuleset = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+ } else if(!strcmp(inppblk.descr[i].name, "ratelimit.burst")) {
+ inst->ratelimitBurst = (unsigned int) pvals[i].val.d.n;
+ } else if(!strcmp(inppblk.descr[i].name, "ratelimit.interval")) {
+ inst->ratelimitInterval = (unsigned int) pvals[i].val.d.n;
+ } else if(!strcmp(inppblk.descr[i].name, "rcvbufsize")) {
+ const uint64_t val = pvals[i].val.d.n;
+ if(val > 1024 * 1024 * 1024) {
+ LogError(0, RS_RET_MISSING_CNFPARAMS,
+ "imudp: rcvbufsize maximum is 1 GiB, using "
+ "default instead");
+ } else {
+ inst->rcvbuf = (int) val;
+ }
+ } else if(!strcmp(inppblk.descr[i].name, "ipfreebind")) {
+ inst->ipfreebind = (int) pvals[i].val.d.n;
+ } else {
+ dbgprintf("imudp: program error, non-handled "
+ "param '%s'\n", inppblk.descr[i].name);
+ }
+ }
+finalize_it:
+ RETiRet;
+}
+
+
+BEGINnewInpInst
+ struct cnfparamvals *pvals;
+ int i;
+ int portIdx;
+CODESTARTnewInpInst
+ DBGPRINTF("newInpInst (imudp)\n");
+
+ if((pvals = nvlstGetParams(lst, &inppblk, NULL)) == NULL) {
+ ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS);
+ }
+ if(Debug) {
+ dbgprintf("input param blk in imudp:\n");
+ cnfparamsPrint(&inppblk, pvals);
+ }
+
+ portIdx = cnfparamGetIdx(&inppblk, "port");
+ assert(portIdx != -1);
+ for(i = 0 ; i < pvals[portIdx].val.d.ar->nmemb ; ++i) {
+ createListner(pvals[portIdx].val.d.ar->arr[i], pvals);
+ }
+
+finalize_it:
+CODE_STD_FINALIZERnewInpInst
+ cnfparamvalsDestruct(pvals, &inppblk);
+ENDnewInpInst
+
+
+BEGINbeginCnfLoad
+CODESTARTbeginCnfLoad
+ loadModConf = pModConf;
+ pModConf->pConf = pConf;
+ /* init our settings */
+ loadModConf->configSetViaV2Method = 0;
+ loadModConf->wrkrMax = 1; /* conservative, but least msg reordering */
+ loadModConf->batchSize = BATCH_SIZE_DFLT;
+ loadModConf->iTimeRequery = TIME_REQUERY_DFLT;
+ loadModConf->iSchedPrio = SCHED_PRIO_UNSET;
+ loadModConf->pszSchedPolicy = NULL;
+ loadModConf->bPreserveCase = 0; /* off */
+ bLegacyCnfModGlobalsPermitted = 1;
+ /* init legacy config vars */
+ cs.pszBindRuleset = NULL;
+ cs.pszSchedPolicy = NULL;
+ cs.pszBindAddr = NULL;
+ cs.pszBindDevice = NULL;
+ cs.iSchedPrio = SCHED_PRIO_UNSET;
+ cs.iTimeRequery = TIME_REQUERY_DFLT;
+ENDbeginCnfLoad
+
+
+BEGINsetModCnf
+ struct cnfparamvals *pvals = NULL;
+ int i;
+ int wrkrMax;
+CODESTARTsetModCnf
+ pvals = nvlstGetParams(lst, &modpblk, NULL);
+ if(pvals == NULL) {
+ LogError(0, RS_RET_MISSING_CNFPARAMS, "imudp: error processing module "
+ "config parameters [module(...)]");
+ ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS);
+ }
+
+ if(Debug) {
+ dbgprintf("module (global) param blk for imudp:\n");
+ cnfparamsPrint(&modpblk, pvals);
+ }
+
+ for(i = 0 ; i < modpblk.nParams ; ++i) {
+ if(!pvals[i].bUsed)
+ continue;
+ if(!strcmp(modpblk.descr[i].name, "timerequery")) {
+ loadModConf->iTimeRequery = (int) pvals[i].val.d.n;
+ } else if(!strcmp(modpblk.descr[i].name, "batchsize")) {
+ loadModConf->batchSize = (int) pvals[i].val.d.n;
+ } else if(!strcmp(modpblk.descr[i].name, "schedulingpriority")) {
+ loadModConf->iSchedPrio = (int) pvals[i].val.d.n;
+ } else if(!strcmp(modpblk.descr[i].name, "schedulingpolicy")) {
+ loadModConf->pszSchedPolicy = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+ } else if(!strcmp(modpblk.descr[i].name, "threads")) {
+ wrkrMax = (int) pvals[i].val.d.n;
+ if(wrkrMax > MAX_WRKR_THREADS) {
+ LogError(0, RS_RET_PARAM_ERROR, "imudp: configured for %d"
+ "worker threads, but maximum permitted is %d",
+ wrkrMax, MAX_WRKR_THREADS);
+ loadModConf->wrkrMax = MAX_WRKR_THREADS;
+ } else {
+ loadModConf->wrkrMax = wrkrMax;
+ }
+ } else if(!strcmp(modpblk.descr[i].name, "preservecase")) {
+ loadModConf->bPreserveCase = (int) pvals[i].val.d.n;
+ } else {
+ dbgprintf("imudp: program error, non-handled "
+ "param '%s' in beginCnfLoad\n", modpblk.descr[i].name);
+ }
+ }
+
+ /* remove all of our legacy handlers, as they can not used in addition
+ * the the new-style config method.
+ */
+ bLegacyCnfModGlobalsPermitted = 0;
+ loadModConf->configSetViaV2Method = 1;
+
+finalize_it:
+ if(pvals != NULL)
+ cnfparamvalsDestruct(pvals, &modpblk);
+ENDsetModCnf
+
+BEGINendCnfLoad
+CODESTARTendCnfLoad
+ if(!loadModConf->configSetViaV2Method) {
+ /* persist module-specific settings from legacy config system */
+ loadModConf->iSchedPrio = cs.iSchedPrio;
+ loadModConf->iTimeRequery = cs.iTimeRequery;
+ if((cs.pszSchedPolicy != NULL) && (cs.pszSchedPolicy[0] != '\0')) {
+ CHKmalloc(loadModConf->pszSchedPolicy = ustrdup(cs.pszSchedPolicy));
+ }
+ }
+
+finalize_it:
+ loadModConf = NULL; /* done loading */
+ /* free legacy config vars */
+ free(cs.pszBindRuleset);
+ free(cs.pszSchedPolicy);
+ free(cs.pszBindAddr);
+ free(cs.pszBindDevice);
+ENDendCnfLoad
+
+
+BEGINcheckCnf
+ instanceConf_t *inst;
+CODESTARTcheckCnf
+ checkSchedParam(pModConf); /* this can not cause fatal errors */
+ for(inst = pModConf->root ; inst != NULL ; inst = inst->next) {
+ std_checkRuleset(pModConf, inst);
+ }
+ if(pModConf->root == NULL) {
+ LogError(0, RS_RET_NO_LISTNERS , "imudp: module loaded, but "
+ "no listeners defined - no input will be gathered");
+ iRet = RS_RET_NO_LISTNERS;
+ }
+ENDcheckCnf
+
+
+BEGINactivateCnfPrePrivDrop
+ instanceConf_t *inst;
+CODESTARTactivateCnfPrePrivDrop
+ runModConf = pModConf;
+ for(inst = runModConf->root ; inst != NULL ; inst = inst->next) {
+ addListner(inst);
+ }
+ /* if we could not set up any listeners, there is no point in running... */
+ if(lcnfRoot == NULL) {
+ LogError(0, NO_ERRCODE, "imudp: no listeners could be started, "
+ "input not activated.\n");
+ ABORT_FINALIZE(RS_RET_NO_RUN);
+ }
+
+finalize_it:
+ENDactivateCnfPrePrivDrop
+
+
+BEGINactivateCnf
+ int i;
+ int lenRcvBuf;
+CODESTARTactivateCnf
+ /* caching various settings */
+ iMaxLine = glbl.GetMaxLine(runConf);
+ lenRcvBuf = iMaxLine + 1;
+# ifdef HAVE_RECVMMSG
+ lenRcvBuf *= runModConf->batchSize;
+# endif
+ DBGPRINTF("imudp: config params iMaxLine %d, lenRcvBuf %d\n", iMaxLine, lenRcvBuf);
+ for(i = 0 ; i < runModConf->wrkrMax ; ++i) {
+# ifdef HAVE_RECVMMSG
+ CHKmalloc(wrkrInfo[i].recvmsg_iov = malloc(runModConf->batchSize * sizeof(struct iovec)));
+ CHKmalloc(wrkrInfo[i].recvmsg_mmh = malloc(runModConf->batchSize * sizeof(struct mmsghdr)));
+ CHKmalloc(wrkrInfo[i].frominet = malloc(runModConf->batchSize * sizeof(struct sockaddr_storage)));
+# endif
+ CHKmalloc(wrkrInfo[i].pRcvBuf = malloc(lenRcvBuf));
+ wrkrInfo[i].id = i;
+ }
+finalize_it:
+ENDactivateCnf
+
+
+BEGINfreeCnf
+ instanceConf_t *inst, *del;
+CODESTARTfreeCnf
+ for(inst = pModConf->root ; inst != NULL ; ) {
+ free(inst->pszBindPort);
+ free(inst->pszBindAddr);
+ free(inst->pszBindDevice);
+ free(inst->pszBindRuleset);
+ free(inst->inputname);
+ free(inst->dfltTZ);
+ del = inst;
+ inst = inst->next;
+ free(del);
+ }
+ENDfreeCnf
+
+
+static void *
+wrkr(void *myself)
+{
+ struct wrkrInfo_s *pWrkr = (struct wrkrInfo_s*) myself;
+ uchar thrdName[32];
+
+ snprintf((char*)thrdName, sizeof(thrdName), "imudp(w%d)", pWrkr->id);
+# if defined(HAVE_PRCTL) && defined(PR_SET_NAME)
+ /* set thread name - we ignore if the call fails, has no harsh consequences... */
+ if(prctl(PR_SET_NAME, thrdName, 0, 0, 0) != 0) {
+ DBGPRINTF("prctl failed, not setting thread name for '%s'\n", thrdName);
+ }
+# endif
+ dbgOutputTID((char*)thrdName);
+
+ /* Note well: the setting of scheduling parameters will not work
+ * when we dropped privileges (if the user is not sufficiently
+ * privileged, of course). Howerver, we can't change the
+ * scheduling params in PrePrivDrop(), as at that point our thread
+ * is not yet created. So at least as an interim solution, we do
+ * NOT support both setting sched parameters and dropping
+ * privileges within the same instance.
+ */
+ setSchedParams(runModConf);
+
+ /* support statistics gathering */
+ statsobj.Construct(&(pWrkr->stats));
+ statsobj.SetName(pWrkr->stats, thrdName);
+ statsobj.SetOrigin(pWrkr->stats, (uchar*)"imudp");
+ STATSCOUNTER_INIT(pWrkr->ctrCall_recvmmsg, pWrkr->mutCtrCall_recvmmsg);
+ statsobj.AddCounter(pWrkr->stats, UCHAR_CONSTANT("called.recvmmsg"),
+ ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkr->ctrCall_recvmmsg));
+ STATSCOUNTER_INIT(pWrkr->ctrCall_recvmsg, pWrkr->mutCtrCall_recvmsg);
+ statsobj.AddCounter(pWrkr->stats, UCHAR_CONSTANT("called.recvmsg"),
+ ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkr->ctrCall_recvmsg));
+ STATSCOUNTER_INIT(pWrkr->ctrMsgsRcvd, pWrkr->mutCtrMsgsRcvd);
+ statsobj.AddCounter(pWrkr->stats, UCHAR_CONSTANT("msgs.received"),
+ ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkr->ctrMsgsRcvd));
+ statsobj.ConstructFinalize(pWrkr->stats);
+
+ rcvMainLoop(pWrkr);
+
+ /* cleanup */
+ return NULL;
+}
+
+/* This function is called to gather input.
+ * In essence, it just starts the pool of workers. To save resources,
+ * we run one of the workers on our own thread -- otherwise that thread would
+ * just idle around and wait for the workers to finish.
+ */
+BEGINrunInput
+ int i;
+ pthread_attr_t wrkrThrdAttr;
+CODESTARTrunInput
+ pthread_attr_init(&wrkrThrdAttr);
+ pthread_attr_setstacksize(&wrkrThrdAttr, 4096*1024);
+ for(i = 0 ; i < runModConf->wrkrMax - 1 ; ++i) {
+ wrkrInfo[i].pThrd = pThrd;
+ pthread_create(&wrkrInfo[i].tid, &wrkrThrdAttr, wrkr, &(wrkrInfo[i]));
+ }
+ pthread_attr_destroy(&wrkrThrdAttr);
+
+ wrkrInfo[i].pThrd = pThrd;
+ wrkrInfo[i].id = i;
+ wrkr(&wrkrInfo[i]);
+
+ for(i = 0 ; i < runModConf->wrkrMax - 1 ; ++i) {
+ pthread_kill(wrkrInfo[i].tid, SIGTTIN);
+ }
+ for(i = 0 ; i < runModConf->wrkrMax - 1 ; ++i) {
+ pthread_join(wrkrInfo[i].tid, NULL);
+ }
+ENDrunInput
+
+
+/* initialize and return if will run or not */
+BEGINwillRun
+CODESTARTwillRun
+ net.PrintAllowedSenders(1); /* UDP */
+ net.HasRestrictions(UCHAR_CONSTANT("UDP"), &bDoACLCheck); /* UDP */
+ENDwillRun
+
+
+BEGINafterRun
+ struct lstn_s *lstn, *lstnDel;
+ int i;
+CODESTARTafterRun
+ /* do cleanup here */
+ net.clearAllowedSenders((uchar*)"UDP");
+ for(lstn = lcnfRoot ; lstn != NULL ; ) {
+ statsobj.Destruct(&(lstn->stats));
+ ratelimitDestruct(lstn->ratelimiter);
+ close(lstn->sock);
+ prop.Destruct(&lstn->pInputName);
+ lstnDel = lstn;
+ lstn = lstn->next;
+ free(lstnDel);
+ }
+ lcnfRoot = lcnfLast = NULL;
+ for(i = 0 ; i < runModConf->wrkrMax ; ++i) {
+# ifdef HAVE_RECVMMSG
+ free(wrkrInfo[i].recvmsg_iov);
+ free(wrkrInfo[i].recvmsg_mmh);
+ free(wrkrInfo[i].frominet);
+# endif
+ free(wrkrInfo[i].pRcvBuf);
+ }
+ENDafterRun
+
+
+BEGINmodExit
+CODESTARTmodExit
+ /* release what we no longer need */
+ objRelease(glbl, CORE_COMPONENT);
+ objRelease(statsobj, CORE_COMPONENT);
+ objRelease(datetime, CORE_COMPONENT);
+ objRelease(prop, CORE_COMPONENT);
+ objRelease(ruleset, CORE_COMPONENT);
+ objRelease(net, LM_NET_FILENAME);
+ENDmodExit
+
+
+BEGINisCompatibleWithFeature
+CODESTARTisCompatibleWithFeature
+ if(eFeat == sFEATURENonCancelInputTermination)
+ iRet = RS_RET_OK;
+ENDisCompatibleWithFeature
+
+
+BEGINqueryEtryPt
+CODESTARTqueryEtryPt
+CODEqueryEtryPt_STD_IMOD_QUERIES
+CODEqueryEtryPt_STD_CONF2_QUERIES
+CODEqueryEtryPt_STD_CONF2_setModCnf_QUERIES
+CODEqueryEtryPt_STD_CONF2_PREPRIVDROP_QUERIES
+CODEqueryEtryPt_STD_CONF2_IMOD_QUERIES
+CODEqueryEtryPt_IsCompatibleWithFeature_IF_OMOD_QUERIES
+ENDqueryEtryPt
+
+static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal)
+{
+ free(cs.pszBindAddr);
+ cs.pszBindAddr = NULL;
+ free(cs.pszBindDevice);
+ cs.pszBindDevice = NULL;
+ free(cs.pszSchedPolicy);
+ cs.pszSchedPolicy = NULL;
+ free(cs.pszBindRuleset);
+ cs.pszBindRuleset = NULL;
+ cs.iSchedPrio = SCHED_PRIO_UNSET;
+ cs.iTimeRequery = TIME_REQUERY_DFLT;/* the default is to query only every second time */
+ return RS_RET_OK;
+}
+
+
+BEGINmodInit()
+CODESTARTmodInit
+ *ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
+CODEmodInit_QueryRegCFSLineHdlr
+ CHKiRet(objUse(glbl, CORE_COMPONENT));
+ CHKiRet(objUse(statsobj, CORE_COMPONENT));
+ CHKiRet(objUse(datetime, CORE_COMPONENT));
+ CHKiRet(objUse(prop, CORE_COMPONENT));
+ CHKiRet(objUse(ruleset, CORE_COMPONENT));
+ CHKiRet(objUse(net, LM_NET_FILENAME));
+
+ DBGPRINTF("imudp: version %s initializing\n", VERSION);
+# ifdef HAVE_RECVMMSG
+ DBGPRINTF("imdup: support for recvmmsg() present\n");
+# endif
+
+ /* register config file handlers */
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputudpserverbindruleset", 0, eCmdHdlrGetWord,
+ NULL, &cs.pszBindRuleset, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"udpserverrun", 0, eCmdHdlrGetWord,
+ addInstance, NULL, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"udpserveraddress", 0, eCmdHdlrGetWord,
+ NULL, &cs.pszBindAddr, STD_LOADABLE_MODULE_ID));
+ /* module-global config params - will be disabled in configs that are loaded
+ * via module(...).
+ */
+ CHKiRet(regCfSysLineHdlr2((uchar *)"imudpschedulingpolicy", 0, eCmdHdlrGetWord,
+ NULL, &cs.pszSchedPolicy, STD_LOADABLE_MODULE_ID, &bLegacyCnfModGlobalsPermitted));
+ CHKiRet(regCfSysLineHdlr2((uchar *)"imudpschedulingpriority", 0, eCmdHdlrInt,
+ NULL, &cs.iSchedPrio, STD_LOADABLE_MODULE_ID, &bLegacyCnfModGlobalsPermitted));
+ CHKiRet(regCfSysLineHdlr2((uchar *)"udpservertimerequery", 0, eCmdHdlrInt,
+ NULL, &cs.iTimeRequery, STD_LOADABLE_MODULE_ID, &bLegacyCnfModGlobalsPermitted));
+
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler,
+ resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID));
+ENDmodInit
+/* vim:set ai:
+ */