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-rw-r--r--plugins/omsnmp/omsnmp.c147
1 files changed, 96 insertions, 51 deletions
diff --git a/plugins/omsnmp/omsnmp.c b/plugins/omsnmp/omsnmp.c
index f31f071f..f7777523 100644
--- a/plugins/omsnmp/omsnmp.c
+++ b/plugins/omsnmp/omsnmp.c
@@ -82,15 +82,17 @@ static int iTrapType = SNMP_TRAP_ENTERPRISESPECIFIC;/*Default is SNMP_TRAP_ENTER
typedef struct _instanceData {
uchar szTransport[OMSNMP_MAXTRANSPORLENGTH+1]; /* Transport - Can be udp, tcp, udp6, tcp6 and other types supported by NET-SNMP */
- uchar szTarget[MAXHOSTNAMELEN+1]; /* IP/hostname of Snmp Target*/
- uchar szTargetAndPort[MAXHOSTNAMELEN+1]; /* IP/hostname + Port,needed format for SNMP LIB */
+ uchar szTarget[MAXHOSTNAMELEN+1]; /* IP/hostname of Snmp Target*/
+ uchar szTargetAndPort[MAXHOSTNAMELEN+1]; /* IP/hostname + Port,needed format for SNMP LIB */
uchar szCommunity[OMSNMP_MAXCOMMUNITYLENGHT+1]; /* Snmp Community */
uchar szEnterpriseOID[OMSNMP_MAXOIDLENGHT+1]; /* Snmp Enterprise OID - default is (1.3.6.1.4.1.3.1.1 = enterprises.cmu.1.1) */
uchar szSyslogMessageOID[OMSNMP_MAXOIDLENGHT+1]; /* Snmp OID used for the Syslog Message - default is 1.3.6.1.4.1 - .iso.org.dod.internet.private.enterprises */
- int iPort; /* Target Port */
- int iSNMPVersion; /* SNMP Version to use */
- int iTrapType; /* Snmp TrapType or GenericType */
- int iSpecificType; /* Snmp Specific Type */
+ int iPort; /* Target Port */
+ int iSNMPVersion; /* SNMP Version to use */
+ int iTrapType; /* Snmp TrapType or GenericType */
+ int iSpecificType; /* Snmp Specific Type */
+
+ netsnmp_session *snmpsession; /* Holds to SNMP Session, NULL if not initialized */
} instanceData;
BEGINcreateInstance
@@ -118,32 +120,41 @@ CODESTARTisCompatibleWithFeature
/* we are not compatible with repeated msg reduction feature, so do not allow it */
ENDisCompatibleWithFeature
+/* Exit SNMP Session
+ * alorbach, 2008-02-12
+ */
+static rsRetVal omsnmp_exitSession(instanceData *pData)
+{
+ DEFiRet;
-BEGINtryResume
-CODESTARTtryResume
-ENDtryResume
+ if(pData->snmpsession != NULL) {
+ dbgprintf( "omsnmp_exitSession: Clearing Session to '%s' on Port = '%d'\n", pData->szTarget, pData->iPort);
+ snmp_close(pData->snmpsession);
+ pData->snmpsession = NULL;
+ }
-static rsRetVal omsnmp_sendsnmp(instanceData *pData, uchar *psz)
+ RETiRet;
+}
+
+/* Init SNMP Session
+ * alorbach, 2008-02-12
+ */
+static rsRetVal omsnmp_initSession(instanceData *pData)
{
DEFiRet;
+
+ /* should not happen, but if session is not cleared yet - we do it now! */
+ if (pData->snmpsession != NULL)
+ omsnmp_exitSession(pData);
- netsnmp_session session, *ss;
- netsnmp_pdu *pdu = NULL;
- oid enterpriseoid[MAX_OID_LEN];
- size_t enterpriseoidlen = MAX_OID_LEN;
- oid oidSyslogMessage[MAX_OID_LEN];
- size_t oLen = MAX_OID_LEN;
- int status;
- char *trap = NULL;
- const char *strErr = NULL;
+ netsnmp_session session;
- assert(psz != NULL);
- dbgprintf( "omsnmp_sendsnmp: ENTER - Target = '%s' on Port = '%d' syslogmessage = '%s'\n", pData->szTarget, pData->iPort, (char*)psz);
+ dbgprintf( "omsnmp_initSession: ENTER - Target = '%s' on Port = '%d'\n", pData->szTarget, pData->iPort);
putenv(strdup("POSIXLY_CORRECT=1"));
-
+
snmp_sess_init(&session);
- session.version = pData->iSNMPVersion; /* Sample SNMP_VERSION_1; */
+ session.version = pData->iSNMPVersion;
session.callback = NULL; /* NOT NEEDED */
session.callback_magic = NULL;
session.peername = (char*) pData->szTargetAndPort;
@@ -155,16 +166,50 @@ static rsRetVal omsnmp_sendsnmp(instanceData *pData, uchar *psz)
session.community_len = strlen((char*) pData->szCommunity);
}
- ss = snmp_open(&session);
- if (ss == NULL)
+ pData->snmpsession = snmp_open(&session);
+ if (pData->snmpsession == NULL)
+ {
+ logerrorVar("omsnmp_initSession: snmp_open to host '%s' on Port '%d' failed\n", pData->szTarget, pData->iPort);
+ /* Stay suspended */
+ iRet = RS_RET_SUSPENDED;
+ }
+ else
{
- /*TODO diagnose snmp_open errors with the input netsnmp_session pointer */
- logerrorVar("omsnmp_sendsnmp: snmp_open to host '%s' on Port '%d' failed\n", pData->szTarget, pData->iPort);
- ABORT_FINALIZE(RS_RET_ERR);
+ /* Report success */
+ iRet = RS_RET_OK;
+ }
+
+ RETiRet;
+}
+
+static rsRetVal omsnmp_sendsnmp(instanceData *pData, uchar *psz)
+{
+ DEFiRet;
+
+ netsnmp_pdu *pdu = NULL;
+ oid enterpriseoid[MAX_OID_LEN];
+ size_t enterpriseoidlen = MAX_OID_LEN;
+ oid oidSyslogMessage[MAX_OID_LEN];
+ size_t oLen = MAX_OID_LEN;
+ int status;
+ char *trap = NULL;
+ const char *strErr = NULL;
+
+ /* Init SNMP Session if necessary */
+ if (pData->snmpsession == NULL)
+ {
+ iRet = omsnmp_initSession(pData);
+ if (iRet != RS_RET_OK) {
+ ABORT_FINALIZE(iRet); /* This will most likely return RS_RET_SUSPENDED */
+ }
}
+ /* String should not be NULL */
+ assert(psz != NULL);
+ dbgprintf( "omsnmp_sendsnmp: ENTER - Syslogmessage = '%s'\n", (char*)psz);
+
/* If SNMP Version1 is configured !*/
- if (session.version == SNMP_VERSION_1)
+ if ( pData->snmpsession->version == SNMP_VERSION_1)
{
pdu = snmp_pdu_create(SNMP_MSG_TRAP);
@@ -174,7 +219,7 @@ static rsRetVal omsnmp_sendsnmp(instanceData *pData, uchar *psz)
strErr = snmp_api_errstring(snmp_errno);
logerrorVar("omsnmp_sendsnmp: Parsing EnterpriseOID failed '%s' with error '%s' \n", pData->szSyslogMessageOID, strErr);
- ABORT_FINALIZE(RS_RET_ERR);
+ ABORT_FINALIZE(RS_RET_DISABLE_ACTION);
}
pdu->enterprise = (oid *) malloc(enterpriseoidlen * sizeof(oid));
memcpy(pdu->enterprise, enterpriseoid, enterpriseoidlen * sizeof(oid));
@@ -190,7 +235,7 @@ static rsRetVal omsnmp_sendsnmp(instanceData *pData, uchar *psz)
pdu->time = get_uptime();
}
/* If SNMP Version2c is configured !*/
- else if (session.version == SNMP_VERSION_2c)
+ else if (pData->snmpsession->version == SNMP_VERSION_2c)
{
long sysuptime;
char csysuptime[20];
@@ -209,7 +254,7 @@ static rsRetVal omsnmp_sendsnmp(instanceData *pData, uchar *psz)
{
strErr = snmp_api_errstring(snmp_errno);
logerrorVar("omsnmp_sendsnmp: Adding trap OID failed '%s' with error '%s' \n", pData->szSyslogMessageOID, strErr);
- ABORT_FINALIZE(RS_RET_ERR);
+ ABORT_FINALIZE(RS_RET_DISABLE_ACTION);
}
}
@@ -224,7 +269,7 @@ static rsRetVal omsnmp_sendsnmp(instanceData *pData, uchar *psz)
{
const char *str = snmp_api_errstring(iErrCode);
logerrorVar( "omsnmp_sendsnmp: Invalid SyslogMessage OID, error code '%d' - '%s'\n", iErrCode, str );
- ABORT_FINALIZE(RS_RET_ERR);
+ ABORT_FINALIZE(RS_RET_DISABLE_ACTION);
}
}
else
@@ -232,22 +277,21 @@ static rsRetVal omsnmp_sendsnmp(instanceData *pData, uchar *psz)
strErr = snmp_api_errstring(snmp_errno);
logerrorVar("omsnmp_sendsnmp: Parsing SyslogMessageOID failed '%s' with error '%s' \n", pData->szSyslogMessageOID, strErr);
- ABORT_FINALIZE(RS_RET_ERR);
+ ABORT_FINALIZE(RS_RET_DISABLE_ACTION);
}
/* Send the TRAP */
- status = snmp_send(ss, pdu) == 0;
+ status = snmp_send(pData->snmpsession, pdu) == 0;
if (status)
{
- int iErrorCode = 0;
- if (ss->s_snmp_errno != 0)
- iErrorCode = ss->s_snmp_errno;
- else
- iErrorCode = session.s_snmp_errno;
-
/* Debug Output! */
+ int iErrorCode = pData->snmpsession->s_snmp_errno;
logerrorVar( "omsnmp_sendsnmp: snmp_send failed error '%d', Description='%s'\n", iErrorCode*(-1), api_errors[iErrorCode*(-1)]);
- ABORT_FINALIZE(RS_RET_ERR);
+
+ /* Clear Session */
+ omsnmp_exitSession(pData);
+
+ ABORT_FINALIZE(RS_RET_SUSPENDED);
}
finalize_it:
@@ -257,14 +301,14 @@ finalize_it:
}
}
- if(ss != NULL) {
- snmp_close(ss);
- }
-
dbgprintf( "omsnmp_sendsnmp: LEAVE\n");
RETiRet;
}
+BEGINtryResume
+CODESTARTtryResume
+ iRet = omsnmp_initSession(pData);
+ENDtryResume
BEGINdoAction
CODESTARTdoAction
@@ -273,17 +317,16 @@ CODESTARTdoAction
{
ABORT_FINALIZE(RS_RET_INVALID_PARAMS);
}
-
-/* dbgprintf("omsnmp: Sending SNMP Trap to '%s' on Port '%d'\n", pData->szTarget, pData->iPort); */
+
+ /* This will generate and send the SNMP Trap */
iRet = omsnmp_sendsnmp(pData, ppString[0]);
finalize_it:
ENDdoAction
BEGINfreeInstance
CODESTARTfreeInstance
- /* we do not have instance data, so we do not need to
- * do anything here. -- rgerhards, 2007-07-25
- */
+ /* free snmp Session here */
+ omsnmp_exitSession(pData);
ENDfreeInstance
@@ -388,6 +431,8 @@ CODE_STD_STRING_REQUESTparseSelectorAct(1)
/* Set some defaults in the NetSNMP library */
netsnmp_ds_set_int(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_DEFAULT_PORT, pData->iPort );
+ /* Init Session Pointer */
+ pData->snmpsession = NULL;
CODE_STD_FINALIZERparseSelectorAct
ENDparseSelectorAct
generated by cgit (git 2.34.1) at 2024-05-08 05:40:13 +0000