/* Init SNMP Session
* alorbach, 2008-02-12
*/
static rsRetVal omsnmp_initSession(instanceData *pData)
{
DEFiRet;
netsnmp_session session;
/* should not happen, but if session is not cleared yet - we do it now! */
if (pData->snmpsession != NULL)
omsnmp_exitSession(pData);
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;
session.callback = NULL; /* NOT NEEDED */
session.callback_magic = NULL;
session.peername = (char*) pData->szTargetAndPort;
/* Set SNMP Community */
if (session.version == SNMP_VERSION_1 || session.version == SNMP_VERSION_2c)
{
session.community = (unsigned char *) pData->szCommunity;
session.community_len = strlen((char*) pData->szCommunity);
}
pData->snmpsession = snmp_open(&session);
if (pData->snmpsession == NULL) {
errmsg.LogError(0, RS_RET_SUSPENDED, "omsnmp_initSession: snmp_open to host '%s' on Port '%d' failed\n", pData->szTarget, pData->iPort);
/* Stay suspended */
iRet = RS_RET_SUSPENDED;
}
RETiRet;
}
/* Init SNMP Session
* alorbach, 2008-02-12
*/
static rsRetVal
omsnmp_initSession(wrkrInstanceData_t *pWrkrData)
{
netsnmp_session session;
instanceData *pData;
char szTargetAndPort[MAXHOSTNAMELEN+128]; /* work buffer for specifying a full target and port string */
DEFiRet;
/* should not happen, but if session is not cleared yet - we do it now! */
if (pWrkrData->snmpsession != NULL)
omsnmp_exitSession(pWrkrData);
pData = pWrkrData->pData;
snprintf((char*)szTargetAndPort, sizeof(szTargetAndPort), "%s:%s:%d",
(pData->szTransport == NULL) ? "udp" : (char*)pData->szTransport,
pData->szTarget, pData->iPort == 0 ? 162 : pData->iPort);
dbgprintf( "omsnmp_initSession: ENTER - Target = '%s' on Port = '%d'\n", pData->szTarget, pData->iPort);
if (setenv("POSIXLY_CORRECT", "1", 1) == -1)
ABORT_FINALIZE(RS_RET_ERR);
snmp_sess_init(&session);
session.version = pData->iSNMPVersion;
session.callback = NULL; /* NOT NEEDED */
session.callback_magic = NULL;
session.peername = (char*) szTargetAndPort;
/* Set SNMP Community */
if (session.version == SNMP_VERSION_1 || session.version == SNMP_VERSION_2c) {
session.community = (unsigned char *) pData->szCommunity
== NULL ? (uchar*)"public" : pData->szCommunity;
session.community_len = strlen((char*) session.community);
}
pWrkrData->snmpsession = snmp_open(&session);
if (pWrkrData->snmpsession == NULL) {
errmsg.LogError(0, RS_RET_SUSPENDED, "omsnmp_initSession: snmp_open to host '%s' on Port '%d' "
"failed\n", pData->szTarget, pData->iPort);
/* Stay suspended */
iRet = RS_RET_SUSPENDED;
}
finalize_it:
RETiRet;
}
static rsRetVal omsnmp_sendsnmp(wrkrInstanceData_t *pWrkrData, 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;
instanceData *pData;
pData = pWrkrData->pData;
/* Init SNMP Session if necessary */
if (pWrkrData->snmpsession == NULL) {
CHKiRet(omsnmp_initSession(pWrkrData));
}
/* String should not be NULL */
ASSERT(psz != NULL);
dbgprintf( "omsnmp_sendsnmp: ENTER - Syslogmessage = '%s'\n", (char*)psz);
/* If SNMP Version1 is configured !*/
if(pWrkrData->snmpsession->version == SNMP_VERSION_1) {
pdu = snmp_pdu_create(SNMP_MSG_TRAP);
/* Set enterprise */
if(!snmp_parse_oid(pData->szEnterpriseOID == NULL ? "1.3.6.1.4.1.3.1.1" : (char*)pData->szEnterpriseOID,
enterpriseoid, &enterpriseoidlen )) {
strErr = snmp_api_errstring(snmp_errno);
errmsg.LogError(0, RS_RET_DISABLE_ACTION, "omsnmp_sendsnmp: Parsing EnterpriseOID "
"failed '%s' with error '%s' \n", pData->szSyslogMessageOID, strErr);
ABORT_FINALIZE(RS_RET_DISABLE_ACTION);
}
pdu->enterprise = (oid *) MALLOC(enterpriseoidlen * sizeof(oid));
memcpy(pdu->enterprise, enterpriseoid, enterpriseoidlen * sizeof(oid));
pdu->enterprise_length = enterpriseoidlen;
/* Set Traptype */
pdu->trap_type = pData->iTrapType;
/* Set SpecificType */
pdu->specific_type = pData->iSpecificType;
/* Set Updtime */
pdu->time = get_uptime();
}
/* If SNMP Version2c is configured !*/
else if (pWrkrData->snmpsession->version == SNMP_VERSION_2c)
{
long sysuptime;
char csysuptime[20];
/* Create PDU */
pdu = snmp_pdu_create(SNMP_MSG_TRAP2);
/* Set uptime */
sysuptime = get_uptime();
snprintf( csysuptime, sizeof(csysuptime) , "%ld", sysuptime);
trap = csysuptime;
snmp_add_var(pdu, objid_sysuptime, sizeof(objid_sysuptime) / sizeof(oid), 't', trap);
/* Now set the SyslogMessage Trap OID */
if ( snmp_add_var(pdu, objid_snmptrap, sizeof(objid_snmptrap) / sizeof(oid), 'o',
pData->szSnmpTrapOID == NULL ? "1.3.6.1.4.1.19406.1.2.1" : (char*) pData->szSnmpTrapOID
) != 0) {
strErr = snmp_api_errstring(snmp_errno);
errmsg.LogError(0, RS_RET_DISABLE_ACTION, "omsnmp_sendsnmp: Adding trap OID failed '%s' with error '%s' \n", pData->szSnmpTrapOID, strErr);
ABORT_FINALIZE(RS_RET_DISABLE_ACTION);
}
}
/* SET TRAP PARAMETER for SyslogMessage! */
/* dbgprintf( "omsnmp_sendsnmp: SyslogMessage '%s'\n", psz );*/
/* First create new OID object */
if (snmp_parse_oid(pData->szSyslogMessageOID == NULL ?
"1.3.6.1.4.1.19406.1.1.2.1" : (char*)pData->szSyslogMessageOID,
oidSyslogMessage, &oLen)) {
int iErrCode = snmp_add_var(pdu, oidSyslogMessage, oLen, 's', (char*) psz);
if (iErrCode) {
const char *str = snmp_api_errstring(iErrCode);
errmsg.LogError(0, RS_RET_DISABLE_ACTION, "omsnmp_sendsnmp: Invalid SyslogMessage OID, error code '%d' - '%s'\n", iErrCode, str );
ABORT_FINALIZE(RS_RET_DISABLE_ACTION);
}
} else {
strErr = snmp_api_errstring(snmp_errno);
errmsg.LogError(0, RS_RET_DISABLE_ACTION, "omsnmp_sendsnmp: Parsing SyslogMessageOID failed '%s' with error '%s' \n", pData->szSyslogMessageOID, strErr);
ABORT_FINALIZE(RS_RET_DISABLE_ACTION);
}
/* Send the TRAP */
status = snmp_send(pWrkrData->snmpsession, pdu) == 0;
if (status)
{
/* Debug Output! */
int iErrorCode = pWrkrData->snmpsession->s_snmp_errno;
errmsg.LogError(0, RS_RET_SUSPENDED, "omsnmp_sendsnmp: snmp_send failed error '%d', Description='%s'\n", iErrorCode*(-1), api_errors[iErrorCode*(-1)]);
/* Clear Session */
omsnmp_exitSession(pWrkrData);
ABORT_FINALIZE(RS_RET_SUSPENDED);
}
finalize_it:
if(iRet != RS_RET_OK) {
if(pdu != NULL) {
snmp_free_pdu(pdu);
}
}
dbgprintf( "omsnmp_sendsnmp: LEAVE\n");
RETiRet;
}