// Send a report message.
int v3MP::send_report(unsigned char* scopedPDU, int scopedPDULength,
struct snmp_pdu *pdu, int errorCode, int sLevel,
int sModel, OctetStr &sName,
UdpAddress &destination, Snmp *snmp_session)
{
debugprintf(2, "v3MP::send_report: Sending report message.");
unsigned char *data;
int dataLength;
int pdu_type = 0;
unsigned char cEngineID[MAXLENGTH_ENGINEID+1];
unsigned char cName[MAXLENGTH_CONTEXT_NAME+1];
int cEngineIDLength = MAXLENGTH_ENGINEID+1;
int cNameLength = MAXLENGTH_CONTEXT_NAME+1;
debugprintf(2, "v3MP::send_report: securityLevel %d",sLevel);
if (scopedPDULength != MAX_SNMP_PACKET)
{
// try to get scopedPDU and PDU
data = asn1_parse_scoped_pdu(scopedPDU, &scopedPDULength,
cEngineID, &cEngineIDLength,
cName, &cNameLength);
if (data == NULL) {
debugprintf(1, "mp: Error while trying to parse scopedPDU!");
cEngineID[0] = '\0';
cEngineIDLength = 0;
cName[0] = '\0';
cNameLength = 0;
// Dont send encrypted report if decryption failed:
//if (sLevel == SNMP_SECURITY_LEVEL_AUTH_PRIV)
// sLevel = SNMP_SECURITY_LEVEL_AUTH_NOPRIV;
}
else { // data != NULL
dataLength = scopedPDULength;
// parse data of scopedPDU
snmp_parse_data_pdu(pdu, data, dataLength);
pdu_type = pdu->command;
if (!data) {
debugprintf(0, "mp: Error while trying to parse PDU!");
}
} // end of: if (data == NULL)
} // end if (scopedPDULength != MAX_SNMP_PACKET)
else { // scopedPDULength == MAX_SNMP_PACKET
cEngineID[0] = '\0';
cEngineIDLength = 0;
cName[0] = '\0';
cNameLength = 0;
pdu->reqid = 0;
}
clear_pdu(pdu); // Clear pdu and free all content
debugprintf(4, "pdu->reqid = %ld",pdu->reqid);
pdu->errstat = 0;
pdu->errindex = 0;
pdu->command = REPORT_MSG;
Vb counterVb;
Oid counterOid;
SmiLPOID smioid;
SmiVALUE smival;
switch (errorCode) {
case SNMPv3_MP_INVALID_MESSAGE:
case SNMPv3_USM_PARSE_ERROR: {
counterVb.set_oid(oidSnmpInvalidMsgs);
counterVb.set_value(Counter32(get_stats_invalid_msgs()));
break;
}
case SNMPv3_USM_NOT_IN_TIME_WINDOW:
case SNMPv3_MP_NOT_IN_TIME_WINDOW: {
counterVb.set_oid(oidUsmStatsNotInTimeWindows);
counterVb.set_value(Counter32(usm->get_stats_not_in_time_windows()));
break;
}
case SNMPv3_USM_DECRYPTION_ERROR: {
counterVb.set_oid(oidUsmStatsDecryptionErrors);
counterVb.set_value(Counter32(usm->get_stats_decryption_errors()));
//sLevel = SNMP_SECURITY_LEVEL_NOAUTH_NOPRIV;
break;
}
case SNMPv3_USM_AUTHENTICATION_ERROR:
case SNMPv3_USM_AUTHENTICATION_FAILURE: {
counterVb.set_oid(oidUsmStatsWrongDigests);
counterVb.set_value(Counter32(usm->get_stats_wrong_digests()));
//sLevel = SNMP_SECURITY_LEVEL_NOAUTH_NOPRIV;
break;
}
case SNMPv3_USM_UNKNOWN_ENGINEID:
case SNMPv3_MP_INVALID_ENGINEID: {
//sLevel = SNMP_SECURITY_LEVEL_NOAUTH_NOPRIV;
counterVb.set_oid(oidUsmStatsUnknownEngineIDs);
counterVb.set_value(Counter32(usm->get_stats_unknown_engine_ids()));
break;
}
case SNMPv3_MP_UNSUPPORTED_SECURITY_MODEL: {
counterVb.set_oid(oidSnmpUnknownSecurityModels);
counterVb.set_value(Counter32(get_stats_unknown_security_models()));
sModel = SNMP_SECURITY_MODEL_USM;
sLevel = SNMP_SECURITY_LEVEL_NOAUTH_NOPRIV;
break;
}
case SNMPv3_USM_UNKNOWN_SECURITY_NAME: {
counterVb.set_oid(oidUsmStatsUnknownUserNames);
counterVb.set_value(Counter32(usm->get_stats_unknown_user_names()));
sLevel = SNMP_SECURITY_LEVEL_NOAUTH_NOPRIV;
debugprintf(2, "Report: SecurityName: %s",sName.get_printable());
break;
}
case SNMPv3_USM_UNSUPPORTED_SECURITY_LEVEL: {
counterVb.set_oid(oidUsmStatsUnsupportedSecLevels);
counterVb.set_value(Counter32(usm->get_stats_unsupported_sec_levels()));
sLevel = SNMP_SECURITY_LEVEL_NOAUTH_NOPRIV;
break;
}
default: {
counterVb.set_oid(oidSnmpInvalidMsgs);
counterVb.set_value(Counter32(get_stats_invalid_msgs()));
sModel = SNMP_SECURITY_MODEL_USM;
sLevel = SNMP_SECURITY_LEVEL_NOAUTH_NOPRIV;
sName.set_data(0, 0);
debugprintf(2, "ErrorCode was %i in snmp_parse", errorCode);
}
} // end switch
counterVb.get_oid(counterOid);
smioid = counterOid.oidval();
int status = convertVbToSmival(counterVb, &smival);
if (status != SNMP_CLASS_SUCCESS) {
return SNMPv3_MP_ERROR;
}
snmp_add_var(pdu, smioid->ptr,
(int) smioid->len, &smival);
freeSmivalDescriptor(&smival);
Buffer<unsigned char> sendbuffer(MAX_SNMP_PACKET);
int sendbufferlen= MAX_SNMP_PACKET;
status = snmp_build( pdu, sendbuffer.get_ptr(), &sendbufferlen,
own_engine_id_oct, sName, sModel, sLevel,
OctetStr(cEngineID, cEngineIDLength),
OctetStr(cName, cNameLength));
if (status != SNMPv3_MP_OK) {
debugprintf(2, "v3MP::send_report: error serializing message (mpSnmpBuild returns: %i).", status);
return SNMPv3_MP_ERROR;
}
SnmpSocket send_fd = INVALID_SOCKET;
if (pdu_type == sNMP_PDU_INFORM)
{
debugprintf(4, "Received a snmpInform pdu.");
if (snmp_session->get_eventListHolder()->notifyEventList())
send_fd = snmp_session->get_eventListHolder()->notifyEventList()->get_notify_fd();
}
status = snmp_session->send_raw_data(sendbuffer.get_ptr(),
(size_t)sendbufferlen,// pdu to send
destination, // target address
send_fd); // the fd to use
if ( status != 0)
{
debugprintf(1, "v3MP::send_report: error sending message (%i)", status);
return SNMPv3_MP_ERROR;
}
debugprintf(3, "v3MP::send_report: Report sent.");
return SNMPv3_MP_OK;
}
// Parse the given buffer as a SNMPv3-Message.
int v3MP::snmp_parse(Snmp *snmp_session,
struct snmp_pdu *pdu,
unsigned char *inBuf,
int inBufLength,
OctetStr &securityEngineID,
OctetStr &securityName,
OctetStr &contextEngineID,
OctetStr &contextName,
long &securityLevel,
long &msgSecurityModel,
snmp_version &spp_version,
UdpAddress from_address)
{
debugprintf(3, "mp is parsing incoming message:");
debughexprintf(25, inBuf, inBufLength);
if (inBufLength > MAX_SNMP_PACKET)
return SNMPv3_MP_ERROR;
unsigned char type;
long version;
int origLength = inBufLength;
unsigned char *inBufPtr = inBuf;
long msgID, msgMaxSize;
unsigned char msgFlags;
Buffer<unsigned char> msgSecurityParameters(MAX_SNMP_PACKET);
Buffer<unsigned char> msgData(MAX_SNMP_PACKET);
int msgSecurityParametersLength = inBufLength, msgDataLength = inBufLength;
Buffer<unsigned char> scopedPDU(MAX_SNMP_PACKET);
int scopedPDULength = MAX_SNMP_PACKET;
long maxSizeResponseScopedPDU = 0;
struct SecurityStateReference *securityStateReference = NULL;
int securityParametersPosition;
int rc;
int errorCode = 0;
// get the type
inBuf = asn_parse_header( inBuf, &inBufLength, &type);
if (inBuf == NULL){
debugprintf(0, "snmp_parse: bad header");
return SNMPv3_MP_PARSE_ERROR;
}
if (type != (ASN_SEQ_CON)){
debugprintf(0, "snmp_parse: wrong auth header type");
return SNMPv3_MP_PARSE_ERROR;
}
if (origLength != inBufLength + (inBuf - inBufPtr)) {
debugprintf(0, "snmp_parse: wrong length of received packet");
return SNMPv3_MP_PARSE_ERROR;
}
// get the version
inBuf = asn_parse_int(inBuf, &inBufLength, &type, &version);
if (inBuf == NULL){
debugprintf(0, "snmp_parse: bad parse of version");
return SNMPv3_MP_PARSE_ERROR;
}
debugprintf(3, "Parsed length(%x), version(0x%lx)", inBufLength, version);
if ( version != SNMP_VERSION_3 )
return SNMPv3_MP_PARSE_ERROR;
spp_version = (snmp_version) version;
inBuf = asn1_parse_header_data(inBuf, &inBufLength,
&msgID, &msgMaxSize,
&msgFlags, &msgSecurityModel);
if (inBuf == NULL){
debugprintf(0, "snmp_parse: bad parse of msgHeaderData");
return SNMPv3_MP_PARSE_ERROR;
}
pdu->msgid = msgID;
if ((msgMaxSize < 484) || (msgMaxSize > 0x7FFFFFFF)) {
debugprintf(0, "snmp_parse: bad parse of msgMaxSize");
return SNMPv3_MP_PARSE_ERROR;
}
// do not allow larger messages than this entity can handle
if (msgMaxSize > MAX_SNMP_PACKET) msgMaxSize = MAX_SNMP_PACKET;
pdu->maxsize_scopedpdu = msgMaxSize;
inBuf = asn_parse_string( inBuf, &inBufLength, &type,
msgSecurityParameters.get_ptr(),
&msgSecurityParametersLength);
if (inBuf == NULL){
debugprintf(0, "snmp_parse: bad parse of msgSecurityParameters");
return SNMPv3_MP_PARSE_ERROR;
}
securityParametersPosition= SAFE_INT_CAST(inBuf - inBufPtr) - msgSecurityParametersLength;
// the rest of the message is passed directly to the security module
msgDataLength = origLength - SAFE_INT_CAST(inBuf - inBufPtr);
memcpy(msgData.get_ptr(), inBuf, msgDataLength);
debugprintf(3, "Parsed msgdata length(0x%x), "
"msgSecurityParameters length(0x%x)", msgDataLength,
msgSecurityParametersLength);
switch (msgFlags & 0x03) {
case 3: { securityLevel = SNMP_SECURITY_LEVEL_AUTH_PRIV; break;}
case 0: { securityLevel = SNMP_SECURITY_LEVEL_NOAUTH_NOPRIV; break;}
case 1: { securityLevel = SNMP_SECURITY_LEVEL_AUTH_NOPRIV; break;}
default: { securityLevel = SNMP_SECURITY_LEVEL_NOAUTH_NOPRIV;
snmpInvalidMsgs++;
// do not send back report
return SNMPv3_MP_INVALID_MESSAGE;
break;
}
}
bool reportableFlag;
if (msgFlags & 0x04) reportableFlag = true;
else reportableFlag = false;
securityStateReference = usm->get_new_sec_state_reference();
if (!securityStateReference)
return SNMPv3_MP_ERROR;
switch (msgSecurityModel) {
case SNMP_SECURITY_MODEL_USM:
{
rc = usm->process_msg(
msgMaxSize,
msgSecurityParameters.get_ptr(),
msgSecurityParametersLength,
securityParametersPosition,
securityLevel,
inBufPtr, origLength, //wholeMsg
msgData.get_ptr(), msgDataLength,
securityEngineID,
securityName,
scopedPDU.get_ptr(), &scopedPDULength,
&maxSizeResponseScopedPDU,
securityStateReference,
from_address);
pdu->maxsize_scopedpdu = maxSizeResponseScopedPDU;
if (rc != SNMPv3_USM_OK) {
if (rc == SNMPv3_USM_NOT_IN_TIME_WINDOW) {
errorCode = SNMPv3_MP_NOT_IN_TIME_WINDOW;
}
else {
// error handling! rfc2262 page 31
debugprintf(0, "mp: error while executing USM::process_msg");
errorCode = rc;
}
}
if (errorCode != SNMPv3_USM_PARSE_ERROR)
if (securityEngineID.len() == 0)
errorCode = SNMPv3_MP_INVALID_ENGINEID;
break;
}
default: {
snmpUnknownSecurityModels++;
usm->delete_sec_state_reference(securityStateReference);
debugprintf(0, "SecurityModel of incomming Message not supported!");
// Message should be dropped without a report
return SNMPv3_MP_UNSUPPORTED_SECURITY_MODEL;
}
}
// process scopedPDU
debughexcprintf(21, "scoped PDU", scopedPDU.get_ptr(), scopedPDULength);
unsigned char *scopedPDUPtr= scopedPDU.get_ptr();
unsigned char tmp_contextEngineID[MAXLENGTH_ENGINEID];
unsigned char tmp_contextName[MAXLENGTH_CONTEXT_NAME];
int tmp_contextEngineIDLength = MAXLENGTH_ENGINEID;
int tmp_contextNameLength = MAXLENGTH_CONTEXT_NAME;
unsigned char *data;
int dataLength;
debugprintf(1,"ErrorCode is %i",errorCode);
if (!errorCode) {
data = asn1_parse_scoped_pdu(scopedPDUPtr, &scopedPDULength,
tmp_contextEngineID,
&tmp_contextEngineIDLength,
tmp_contextName, &tmp_contextNameLength);
if (data == NULL) {
debugprintf(0, "mp: Error Parsing scopedPDU!");
usm->delete_sec_state_reference(securityStateReference);
return SNMPv3_MP_PARSE_ERROR;
}
dataLength = scopedPDULength;
contextEngineID.set_data(tmp_contextEngineID, tmp_contextEngineIDLength);
contextName.set_data(tmp_contextName, tmp_contextNameLength);
// parse data of scopedPDU
if (snmp_parse_data_pdu(pdu, data, dataLength) != SNMP_CLASS_SUCCESS) {
debugprintf(0, "mp: Error parsing PDU!");
usm->delete_sec_state_reference(securityStateReference);
return SNMPv3_MP_PARSE_ERROR;
}
if (SNMP_CLASS_SUCCESS != snmp_parse_vb(pdu, data, dataLength)) {
debugprintf(0, "mp: Error parsing Vb");
usm->delete_sec_state_reference(securityStateReference);
return SNMPv3_MP_PARSE_ERROR;
}
if ((tmp_contextEngineIDLength == 0) &&
((pdu->command == GET_REQ_MSG) || (pdu->command == GETNEXT_REQ_MSG) ||
(pdu->command == SET_REQ_MSG) || (pdu->command == GETBULK_REQ_MSG) ||
(pdu->command == TRP_REQ_MSG) || (pdu->command == INFORM_REQ_MSG) ||
(pdu->command == TRP2_REQ_MSG)))
{
// RFC 2572 � 4.2.2.1 (2a)
debugprintf(2, "mp: received request message with zero length"
" contextEngineID -> unknownPduHandlers.");
inc_stats_unknown_pdu_handlers();
errorCode = SNMPv3_MP_UNKNOWN_PDU_HANDLERS;
}
}
if (errorCode) {
if ((reportableFlag) && (errorCode != SNMPv3_USM_PARSE_ERROR)) {
// error occured: prepare reportpdu in agent
cache.add_entry(msgID, pdu->reqid, securityEngineID,
msgSecurityModel,
securityName, securityLevel, "", "",
securityStateReference, errorCode, CACHE_REMOTE_REQ);
send_report(scopedPDUPtr, scopedPDULength, pdu, errorCode,
securityLevel, msgSecurityModel, securityName,
from_address, snmp_session);
clear_pdu(pdu, true); // Clear pdu and free all content AND IDs!
}
else {
usm->delete_sec_state_reference(securityStateReference);
}
return errorCode;
}
struct Cache::Entry_T centry;
if ((pdu->command == GET_RSP_MSG) || (pdu->command == REPORT_MSG)) {
rc = cache.get_entry(msgID, true, ¢ry);
if (rc != SNMPv3_MP_OK) {
// RFC 2572 � 4
debugprintf(2, "Received rspMsg without outstanding request."
" -> SnmpUnknownPduHandler");
usm->delete_sec_state_reference(securityStateReference);
inc_stats_unknown_pdu_handlers();
return SNMPv3_MP_UNKNOWN_PDU_HANDLERS;
}
if (((pdu->reqid == 0) || (pdu->reqid == 0x7fffffff))
&& (pdu->command == REPORT_MSG))
pdu->reqid = centry.req_id;
#ifdef BUGGY_REPORT_REQID
if ((pdu->reqid != centry.req_id) && (pdu->command == REPORT_MSG))
{
debugprintf(0, "WARNING: setting reqid of REPORT PDU (from) (to): (%ld) (%ld)", pdu->reqid, centry.req_id);
pdu->reqid = centry.req_id;
}
#endif
}
if (pdu->command == REPORT_MSG) {
// !! rfc2262 page 33
debugprintf(2, "*** Receiving a ReportPDU ***");
if (/*((securityEngineID != centry.sec_engine_id)
&& (centry.sec_engine_id.len() != 0)) ||*/
((msgSecurityModel != centry.sec_model)
&& (msgSecurityModel != SNMP_SECURITY_MODEL_USM)) ||
((securityName != centry.sec_name)
&& (securityName.len() != 0)))
{
debugprintf(0, "Received report message doesn't match sent message!");
usm->delete_sec_state_reference(securityStateReference);
return SNMPv3_MP_MATCH_ERROR;
}
usm->delete_sec_state_reference(securityStateReference);
cache.delete_content(centry);
debugprintf(1, "mp finished (OK)");
return SNMPv3_MP_OK;
}
if (pdu->command == GET_RSP_MSG) {
if (((securityEngineID != centry.sec_engine_id)
&& (centry.sec_engine_id.len() != 0)) ||
(msgSecurityModel != centry.sec_model) ||
(securityName != centry.sec_name) ||
(securityLevel != centry.sec_level) ||
((contextEngineID != centry.context_engine_id)
&& (centry.context_engine_id.len() != 0))||
((contextName != centry.context_name)
&& (centry.context_name.len() != 0))) {
debugprintf(0, "Received response message doesn't match sent message!");
usm->delete_sec_state_reference(securityStateReference);
cache.delete_content(centry);
return SNMPv3_MP_MATCH_ERROR;
}
usm->delete_sec_state_reference(securityStateReference);
cache.delete_content(centry);
debugprintf(1, "mp finished (OK)");
return SNMPv3_MP_OK;
}
if ((pdu->command == GET_REQ_MSG) || (pdu->command == GETNEXT_REQ_MSG) ||
(pdu->command == SET_REQ_MSG) || (pdu->command == GETBULK_REQ_MSG) ||
(pdu->command == INFORM_REQ_MSG)) {
if (securityEngineID.len() == 0) {
debugprintf(2, "Received Message with engineID = 0.");
}
else {
if (!(unsignedCharCompare(securityEngineID.data(), securityEngineID.len(),
own_engine_id, own_engine_id_len))) {
debugprintf(0, "snmp_parse: securityEngineID doesn't match own_engine_id.");
/* we are authoritative but engine id of message is wrong
if discovery in USM is enabled:
- remove automatically added illegal engine id from USM tables
- send a report
*/
if (usm->is_discovery_enabled())
{
// TODO: try to remove engine id from USM
if (reportableFlag)
{
cache.add_entry(msgID, pdu->reqid, securityEngineID,
msgSecurityModel,
securityName, securityLevel, "", "",
securityStateReference,
SNMPv3_MP_INVALID_ENGINEID,
CACHE_REMOTE_REQ);
send_report(0, MAX_SNMP_PACKET, pdu, SNMPv3_MP_INVALID_ENGINEID,
SNMP_SECURITY_LEVEL_NOAUTH_NOPRIV, msgSecurityModel,
securityName, from_address, snmp_session);
clear_pdu(pdu, true); // Clear pdu and free all content AND IDs!
}
else
{
usm->delete_sec_state_reference(securityStateReference);
}
return SNMPv3_MP_INVALID_ENGINEID;
}
usm->delete_sec_state_reference(securityStateReference);
return SNMPv3_MP_MATCH_ERROR;
}
}
int ret = cache.add_entry(msgID, pdu->reqid, securityEngineID,
msgSecurityModel, securityName,
securityLevel, contextEngineID,
contextName, securityStateReference,
SNMPv3_MP_OK, CACHE_REMOTE_REQ);
if (ret == SNMPv3_MP_DOUBLED_MESSAGE) {
debugprintf(0, "*** received doubled message ***");
// message will be ignored so return OK
usm->delete_sec_state_reference(securityStateReference);
}
debugprintf(1, "mp: parsing finished (ok).");
return SNMPv3_MP_OK;
}
if ((pdu->command == TRP_REQ_MSG) || (pdu->command == TRP2_REQ_MSG))
{
usm->delete_sec_state_reference(securityStateReference);
return SNMPv3_MP_OK;
}
debugprintf(0, "mp error: This line should not be executed.");
usm->delete_sec_state_reference(securityStateReference);
return SNMPv3_MP_ERROR;
}
// unload the data into SNMP++ objects
int SnmpMessage::unload(Pdu &pdu, // Pdu object
OctetStr &community, // community object
snmp_version &version, // SNMP version #
OctetStr *engine_id, // optional v3
OctetStr *security_name, // optional v3
long int *security_model,
UdpAddress *from_addr,
Snmp *snmp_session)
{
pdu.clear();
if (!valid_flag)
return SNMP_CLASS_INVALID;
snmp_pdu *raw_pdu;
raw_pdu = snmp_pdu_create(0); // do a "snmp_free_pdu( raw_pdu)" before return
int status;
#ifdef _SNMPv3
OctetStr context_engine_id;
OctetStr context_name;
long int security_level = SNMP_SECURITY_LEVEL_NOAUTH_NOPRIV;
if ((security_model) && (security_name) && (engine_id) && (snmp_session)) {
status = v3MP::I->snmp_parse(snmp_session, raw_pdu,
databuff, (int)bufflen, *engine_id,
*security_name, context_engine_id, context_name,
security_level, *security_model, version, *from_addr);
if (status != SNMPv3_MP_OK) {
pdu.set_request_id( raw_pdu->reqid);
pdu.set_type( raw_pdu->command);
snmp_free_pdu( raw_pdu);
return status;
}
pdu.set_context_engine_id(context_engine_id);
pdu.set_context_name(context_name);
pdu.set_security_level(security_level);
pdu.set_message_id(raw_pdu->msgid);
pdu.set_maxsize_scopedpdu(raw_pdu->maxsize_scopedpdu);
}
else {
#endif
unsigned char community_name[MAX_LEN_COMMUNITY + 1];
int community_len = MAX_LEN_COMMUNITY + 1;
status = snmp_parse(raw_pdu, databuff, (int) bufflen,
community_name, community_len, version);
if (status != SNMP_CLASS_SUCCESS) {
snmp_free_pdu(raw_pdu);
return status;
}
community.set_data( community_name, community_len);
#ifdef _SNMPv3
}
#endif
// load up the SNMP++ variables
pdu.set_request_id(raw_pdu->reqid);
pdu.set_error_status((int) raw_pdu->errstat);
pdu.set_error_index((int) raw_pdu->errindex);
pdu.set_type( raw_pdu->command);
// deal with traps a little different
if ( raw_pdu->command == sNMP_PDU_V1TRAP) {
// timestamp
TimeTicks timestamp;
timestamp = raw_pdu->time;
pdu.set_notify_timestamp( timestamp);
// set the agent address
IpAddress agent_addr(inet_ntoa(raw_pdu->agent_addr.sin_addr));
if (agent_addr != "0.0.0.0")
{
pdu.set_v1_trap_address(agent_addr);
LOG_BEGIN(DEBUG_LOG | 4);
LOG("SNMPMessage: Trap address of received v1 trap");
LOG(agent_addr.get_printable());
LOG_END;
}
// set enterprise, notifyid
Oid enterprise;
if (raw_pdu->enterprise_length >0) {
for (int i=0; i< raw_pdu->enterprise_length; i++) {
enterprise += (int) (raw_pdu->enterprise[i]);
}
pdu.set_notify_enterprise(enterprise);
}
switch (raw_pdu->trap_type) {
case 0:
pdu.set_notify_id(coldStart);
break;
case 1:
pdu.set_notify_id(warmStart);
break;
case 2:
pdu.set_notify_id(linkDown);
break;
case 3:
pdu.set_notify_id(linkUp);
break;
case 4:
pdu.set_notify_id(authenticationFailure);
break;
case 5:
pdu.set_notify_id(egpNeighborLoss);
break;
case 6: { // enterprise specific
// base id + specific #
Oid eOid = enterprise;
eOid += 0ul;
eOid += raw_pdu->specific_type;
pdu.set_notify_id( eOid);
break;
}
default:
{
LOG_BEGIN(WARNING_LOG | 3);
LOG("SNMPMessage: Received trap with illegal trap type");
LOG(raw_pdu->trap_type);
LOG_END;
}
}
}
// vbs
Vb tempvb;
Oid tempoid;
struct variable_list *vp;
int vb_nr = 1;
for(vp = raw_pdu->variables; vp; vp = vp->next_variable, vb_nr++) {
// extract the oid portion
tempoid.set_data( (unsigned long *)vp->name,
( unsigned int) vp->name_length);
tempvb.set_oid( tempoid);
// extract the value portion
switch(vp->type){
// octet string
case sNMP_SYNTAX_OCTETS:
{
OctetStr octets( (unsigned char *) vp->val.string,
(unsigned long) vp->val_len);
tempvb.set_value( octets);
}
break;
case sNMP_SYNTAX_OPAQUE:
{
OpaqueStr octets( (unsigned char *) vp->val.string,
(unsigned long) vp->val_len);
tempvb.set_value( octets);
}
break;
// object id
case sNMP_SYNTAX_OID:
{
Oid oid( (unsigned long*) vp->val.objid,
(int) vp->val_len);
tempvb.set_value( oid);
if ((vb_nr == 2) &&
((raw_pdu->command == sNMP_PDU_TRAP) ||
(raw_pdu->command == sNMP_PDU_INFORM)) &&
(tempoid == SNMP_MSG_OID_TRAPID))
{
// set notify_id
pdu.set_notify_id(oid);
continue; // don't add vb to pdu
}
}
break;
// timeticks
case sNMP_SYNTAX_TIMETICKS:
{
TimeTicks timeticks( (unsigned long) *(vp->val.integer));
tempvb.set_value( timeticks);
if ((vb_nr == 1) &&
((raw_pdu->command == sNMP_PDU_TRAP) ||
(raw_pdu->command == sNMP_PDU_INFORM)) &&
(tempoid == SNMP_MSG_OID_SYSUPTIME))
{
// set notify_timestamp
pdu.set_notify_timestamp( timeticks);
continue; // don't add vb to pdu
}
}
break;
// 32 bit counter
case sNMP_SYNTAX_CNTR32:
{
Counter32 counter32( (unsigned long) *(vp->val.integer));
tempvb.set_value( counter32);
}
break;
// 32 bit gauge
case sNMP_SYNTAX_GAUGE32:
{
Gauge32 gauge32( (unsigned long) *(vp->val.integer));
tempvb.set_value( gauge32);
}
break;
// ip address
case sNMP_SYNTAX_IPADDR:
{
char buffer[42];
if (vp->val_len == 16)
sprintf( buffer, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
"%02x%02x:%02x%02x:%02x%02x:%02x%02x",
vp->val.string[ 0], vp->val.string[ 1], vp->val.string[ 2],
vp->val.string[ 3], vp->val.string[ 4], vp->val.string[ 5],
vp->val.string[ 6], vp->val.string[ 7], vp->val.string[ 8],
vp->val.string[ 9], vp->val.string[10], vp->val.string[11],
vp->val.string[12], vp->val.string[13], vp->val.string[14],
vp->val.string[15]);
else
sprintf( buffer,"%d.%d.%d.%d",
vp->val.string[0], vp->val.string[1],
vp->val.string[2], vp->val.string[3]);
IpAddress ipaddress( buffer);
tempvb.set_value( ipaddress);
}
break;
// 32 bit integer
case sNMP_SYNTAX_INT:
{
SnmpInt32 int32( (long) *(vp->val.integer));
tempvb.set_value( int32);
}
break;
// 32 bit unsigned integer
/* Not distinguishable from Gauge32
case sNMP_SYNTAX_UINT32:
{
SnmpUInt32 uint32( (unsigned long) *(vp->val.integer));
tempvb.set_value( uint32);
}
break;
*/
// v2 counter 64's
case sNMP_SYNTAX_CNTR64:
{ // Frank Fock (was empty before)
Counter64 c64(((counter64*)vp->val.counter64)->high,
((counter64*)vp->val.counter64)->low);
tempvb.set_value( c64);
break;
}
case sNMP_SYNTAX_NULL:
tempvb.set_null();
break;
// v2 vb exceptions
case sNMP_SYNTAX_NOSUCHOBJECT:
case sNMP_SYNTAX_NOSUCHINSTANCE:
case sNMP_SYNTAX_ENDOFMIBVIEW:
tempvb.set_exception_status(vp->type);
break;
default:
tempvb.set_null();
} // end switch
// append the vb to the pdu
pdu += tempvb;
}
snmp_free_pdu( raw_pdu);
return SNMP_CLASS_SUCCESS;
}
