int sagent::respond(Pdu& pdu,UdpTarget& tgt)
{
pdu.set_type(sNMP_PDU_RESPONSE);
transaction tr(pdu, tgt, iv_snmp_session_);
tr.send();
return 0;
}
// return a pdu from a buffer
int wpdu::get_pdu(Pdu& pdu, snmp_version& version)
{
if (iovec_.iov_len == 0)
return -1; // NO DATA
snmp_pdu *raw_pdu;
raw_pdu = cmu_snmp::pdu_create(0);
if (!raw_pdu) {
return SNMP_CLASS_RESOURCE_UNAVAIL;
}
// max value a client can send us - TODO: replace this with an
// api to get actual string length
int status = cmu_snmp::parse( raw_pdu, (unsigned char *)iovec_.iov_base,
community_name, comm_len,
version, iovec_.iov_len);
if (status != 0)
return SNMP_CLASS_INTERNAL_ERROR;
community_name[comm_len] = 0; // set null based on returned length
set_request_id( &pdu, raw_pdu->reqid);
set_error_status( &pdu, (int) raw_pdu->errstat);
set_error_index( &pdu, (int) raw_pdu->errindex);
pdu.set_type( raw_pdu->command);
if (restore_vbs(pdu, raw_pdu)) {
cmu_snmp::free_pdu(raw_pdu);
return SNMP_CLASS_INTERNAL_ERROR;
}
cmu_snmp::free_pdu(raw_pdu);
return 0;
}
int Snmp::set( Pdu &pdu, UdpTarget &target, Snmp_Result * cb)
{
ACE_TRACE("Snmp::set");
int rc;
if ((rc = validate_args(pdu, target)) != 0)
return rc;
pdu.set_type( sNMP_PDU_SET);
check_default_port(target);
return run_transaction(pdu, target, cb);
}
// one way, best of luck, non-confirmed alert
int Snmp::trap( Pdu &pdu, UdpTarget &target)
{
ACE_TRACE("Snmp::trap");
int rc;
if ((rc = validate_args(pdu, target)) != 0)
return rc;
pdu.set_type( sNMP_PDU_V1TRAP);
check_default_port(target, DEF_TRAP_PORT);
// 2. write request to agent
transaction trans(pdu, target, iv_snmp_session_);
if (trans.send() > 0) // expect number of bytes sent on
return 0;
last_transaction_status_ = SNMP_CLASS_INTERNAL_ERROR;
return -1;
}
// 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;
}
