//==============[ operator<(Oid &x,Oid &y) ]=============================
// less than < overloaded
int operator<(const Oid &lhs, const Oid &rhs)
{
int result;
// call nCompare with the current
// Oidx, Oidy and len of Oidx
if((result = lhs.nCompare(rhs.len(), rhs))<0) return 1;
if (result > 0) return 0;
// if here, equivalent substrings, call the shorter one <
return (lhs.len() < rhs.len());
}
//------------[ convert SNMP++ VB to WinSNMP smiVALUE ]----------------
int convertVbToSmival( const Vb &tempvb, SmiVALUE *smival )
{
smival->syntax = tempvb.get_syntax();
switch ( smival->syntax ) {
// case sNMP_SYNTAX_NULL
case sNMP_SYNTAX_NULL:
case sNMP_SYNTAX_NOSUCHOBJECT:
case sNMP_SYNTAX_NOSUCHINSTANCE:
case sNMP_SYNTAX_ENDOFMIBVIEW:
break;
// case sNMP_SYNTAX_INT32:
case sNMP_SYNTAX_INT:
tempvb.get_value(smival->value.sNumber);
break;
// case sNMP_SYNTAX_UINT32:
case sNMP_SYNTAX_GAUGE32:
case sNMP_SYNTAX_CNTR32:
case sNMP_SYNTAX_TIMETICKS:
// case sNMP_SYNTAX_UINT32:
tempvb.get_value(smival->value.uNumber);
break;
// case Counter64
case sNMP_SYNTAX_CNTR64:
{
Counter64 c64;
tempvb.get_value(c64);
smival->value.hNumber.hipart = c64.high();
smival->value.hNumber.lopart = c64.low();
}
break;
case sNMP_SYNTAX_BITS:
case sNMP_SYNTAX_OCTETS:
case sNMP_SYNTAX_OPAQUE:
case sNMP_SYNTAX_IPADDR:
{
OctetStr os;
tempvb.get_value(os);
smival->value.string.ptr = NULL;
smival->value.string.len = os.len();
if ( smival->value.string.len > 0 )
{
smival->value.string.ptr
= (SmiLPBYTE) new unsigned char [smival->value.string.len];
if ( smival->value.string.ptr )
{
for (int i=0; i<(int) smival->value.string.len ; i++)
smival->value.string.ptr[i] = os[i];
}
else
{
smival->syntax = sNMP_SYNTAX_NULL; // invalidate the smival
return SNMP_CLASS_RESOURCE_UNAVAIL;
}
}
}
break;
case sNMP_SYNTAX_OID:
{
Oid oid;
tempvb.get_value(oid);
smival->value.oid.ptr = NULL;
smival->value.oid.len = oid.len();
if ( smival->value.oid.len > 0 )
{
smival->value.oid.ptr
= (SmiLPUINT32) new unsigned long [ smival->value.oid.len];
if ( smival->value.oid.ptr )
{
for (int i=0; i<(int)smival->value.oid.len ; i++)
smival->value.oid.ptr[i] = oid[i];
}
else
{
smival->syntax = sNMP_SYNTAX_NULL; // invalidate the smival
return SNMP_CLASS_RESOURCE_UNAVAIL;
}
}
}
break;
default:
return SNMP_CLASS_INTERNAL_ERROR;
}
return SNMP_CLASS_SUCCESS;
}
//=============[ int operator == oid,oid ]=================================
// equivlence operator overloaded
int operator==(const Oid &lhs, const Oid &rhs)
{
// ensure same len, then use nCompare
if (rhs.len() != lhs.len()) return 0;
return (lhs.nCompare(rhs.len(), rhs) == 0);
}
int SnmpMessage::load(const Pdu &cpdu,
const OctetStr &community,
const snmp_version version,
const OctetStr* engine_id,
const OctetStr* security_name,
const int security_model)
{
int status;
const Pdu *pdu = &cpdu;
Pdu temppdu;
// make sure pdu is valid
if ( !pdu->valid())
return SNMP_CLASS_INVALID_PDU;
// create a raw pdu
snmp_pdu *raw_pdu;
raw_pdu = snmp_pdu_create( (int) pdu->get_type());
Oid enterprise;
// load it up
raw_pdu->reqid = pdu->get_request_id();
#ifdef _SNMPv3
raw_pdu->msgid = pdu->get_message_id();
#endif
raw_pdu->errstat= (unsigned long) pdu->get_error_status();
raw_pdu->errindex= (unsigned long) pdu->get_error_index();
// if its a V1 trap then load up other values
// for v2, use normal pdu format
if (raw_pdu->command == sNMP_PDU_V1TRAP)
{
// DON'T forget about the v1 trap agent address (changed by Frank Fock)
GenAddress gen_addr;
IpAddress ip_addr;
int addr_set = FALSE;
if (pdu->get_v1_trap_address(gen_addr))
{
/* User did set the v1 trap address */
if ((gen_addr.get_type() != Address::type_ip) &&
(gen_addr.get_type() != Address::type_udp) )
{
LOG_BEGIN(ERROR_LOG | 4);
LOG("SNMPMessage: Bad v1 trap address type in pdu");
LOG(gen_addr.get_type());
LOG_END;
snmp_free_pdu( raw_pdu);
return SNMP_CLASS_INVALID_PDU;
}
ip_addr = gen_addr;
if (!ip_addr.valid())
{
LOG_BEGIN(ERROR_LOG | 1);
LOG("SNMPMessage: Copied v1 trap address not valid");
LOG_END;
snmp_free_pdu( raw_pdu);
return SNMP_CLASS_RESOURCE_UNAVAIL;
}
addr_set = TRUE;
}
else
{
/* User did not set the v1 trap address */
char addrString[256];
if (gethostname(addrString, 255) == 0)
{
ip_addr = addrString;
addr_set = TRUE;
}
}
struct sockaddr_in agent_addr; // agent address socket struct
// prepare the agent address
memset(&agent_addr, 0, sizeof(agent_addr));
agent_addr.sin_family = AF_INET;
if (addr_set)
{
agent_addr.sin_addr.s_addr
= inet_addr(((IpAddress &)ip_addr).IpAddress::get_printable());
LOG_BEGIN(INFO_LOG | 7);
LOG("SNMPMessage: Setting v1 trap address");
LOG(((IpAddress &)ip_addr).IpAddress::get_printable());
LOG_END;
}
raw_pdu->agent_addr = agent_addr;
//-----[ compute generic trap value ]-------------------------------
// determine the generic value
// 0 - cold start
// 1 - warm start
// 2 - link down
// 3 - link up
// 4 - authentication failure
// 5 - egpneighborloss
// 6 - enterprise specific
Oid trapid;
pdu->get_notify_id( trapid);
if ( !trapid.valid() || trapid.len() < 2 )
{
snmp_free_pdu( raw_pdu);
return SNMP_CLASS_INVALID_NOTIFYID;
}
raw_pdu->specific_type=0;
if ( trapid == coldStart)
raw_pdu->trap_type = 0; // cold start
else if ( trapid == warmStart)
raw_pdu->trap_type = 1; // warm start
else if( trapid == linkDown)
raw_pdu->trap_type = 2; // link down
else if ( trapid == linkUp)
raw_pdu->trap_type = 3; // link up
else if ( trapid == authenticationFailure )
raw_pdu->trap_type = 4; // authentication failure
else if ( trapid == egpNeighborLoss)
raw_pdu->trap_type = 5; // egp neighbor loss
else {
raw_pdu->trap_type = 6; // enterprise specific
// last oid subid is the specific value
// if 2nd to last subid is "0", remove it
// enterprise is always the notify oid prefix
raw_pdu->specific_type = (int) trapid[(int) (trapid.len()-1)];
trapid.trim(1);
if ( trapid[(int)(trapid.len()-1)] == 0 )
trapid.trim(1);
enterprise = trapid;
}
if ( raw_pdu->trap_type !=6)
pdu->get_notify_enterprise( enterprise);
if ( enterprise.len() >0) {
// note!!
// these are hooks into an SNMP++ oid
// and therefor the raw_pdu enterprise
// should not free them. null them out!!
SmiLPOID rawOid;
rawOid = enterprise.oidval();
raw_pdu->enterprise = rawOid->ptr;
raw_pdu->enterprise_length = (int) rawOid->len;
}
// timestamp
TimeTicks timestamp;
pdu->get_notify_timestamp( timestamp);
raw_pdu->time = ( unsigned long) timestamp;
}
// if its a v2 trap then we need to make a few adjustments
// vb #1 is the timestamp
// vb #2 is the id, represented as an Oid
if (( raw_pdu->command == sNMP_PDU_TRAP) ||
( raw_pdu->command == sNMP_PDU_INFORM))
{
Vb tempvb;
temppdu = *pdu;
temppdu.trim(temppdu.get_vb_count());
// vb #1 is the timestamp
TimeTicks timestamp;
tempvb.set_oid(SNMP_MSG_OID_SYSUPTIME); // sysuptime
pdu->get_notify_timestamp( timestamp);
tempvb.set_value ( timestamp);
temppdu += tempvb;
// vb #2 is the id
Oid trapid;
tempvb.set_oid(SNMP_MSG_OID_TRAPID);
pdu->get_notify_id( trapid);
tempvb.set_value( trapid);
temppdu += tempvb;
// append the remaining vbs
for (int z=0; z<pdu->get_vb_count(); z++) {
pdu->get_vb( tempvb,z);
temppdu += tempvb;
}
pdu = &temppdu; // reassign the pdu to the temp one
}
// load up the payload
// for all Vbs in list, add them to the pdu
int vb_count;
Vb tempvb;
Oid tempoid;
SmiLPOID smioid;
SmiVALUE smival;
vb_count = pdu->get_vb_count();
for (int z=0;z<vb_count;z++) {
pdu->get_vb( tempvb,z);
tempvb.get_oid( tempoid);
smioid = tempoid.oidval();
// clear the value portion, in case its
// not already been done so by the app writer
// only do it in the case its a get,next or bulk
if ((raw_pdu->command == sNMP_PDU_GET) ||
(raw_pdu->command == sNMP_PDU_GETNEXT) ||
(raw_pdu->command == sNMP_PDU_GETBULK))
tempvb.set_null();
status = convertVbToSmival( tempvb, &smival );
if ( status != SNMP_CLASS_SUCCESS) {
snmp_free_pdu( raw_pdu);
return status;
}
// add the vb to the raw pdu
snmp_add_var( raw_pdu, smioid->ptr, (int) smioid->len, &smival);
freeSmivalDescriptor( &smival);
}
// ASN1 encode the pdu
#ifdef _SNMPv3
if (version == version3)
{
if ((!engine_id) || (!security_name))
{
LOG_BEGIN(ERROR_LOG | 4);
LOG("SNMPMessage: Need security name and engine id for v3 message");
LOG_END;
// prevention of SNMP++ Enterprise Oid death
if ( enterprise.len() >0) {
raw_pdu->enterprise = 0;
raw_pdu->enterprise_length=0;
}
snmp_free_pdu( raw_pdu);
return SNMP_CLASS_INVALID_TARGET;
}
status = v3MP::I->snmp_build(raw_pdu, databuff, (int *)&bufflen,
*engine_id, *security_name, security_model,
pdu->get_security_level(),
pdu->get_context_engine_id(),
pdu->get_context_name());
if (status == SNMPv3_MP_OK) {
if ((pdu->get_type() == sNMP_PDU_RESPONSE) &&
((int)pdu->get_maxsize_scopedpdu() < pdu->get_asn1_length())) {
LOG_BEGIN(ERROR_LOG | 1);
LOG("SNMPMessage: *BUG*: Serialized response pdu is too big (len) (max)");
LOG(pdu->get_asn1_length());
LOG(pdu->get_maxsize_scopedpdu());
LOG_END;
// prevention of SNMP++ Enterprise Oid death
if ( enterprise.len() >0) {
raw_pdu->enterprise = 0;
raw_pdu->enterprise_length=0;
}
snmp_free_pdu( raw_pdu);
return SNMP_ERROR_TOO_BIG;
}
}
}
else
#endif
status = snmp_build( raw_pdu, databuff, (int *) &bufflen, version,
community.data(), (int) community.len());
LOG_BEGIN(DEBUG_LOG | 4);
LOG("SNMPMessage: return value for build message");
LOG(status);
LOG_END;
if ((status != 0)
#ifdef _SNMPv3
&& ((version != version3) || (status != SNMPv3_MP_OK))
#endif
) {
valid_flag = false;
// prevention of SNMP++ Enterprise Oid death
if ( enterprise.len() >0) {
raw_pdu->enterprise = 0;
raw_pdu->enterprise_length=0;
}
snmp_free_pdu( raw_pdu);
#ifdef _SNMPv3
if (version == version3)
return status;
else
#endif
// NOTE: This is an assumption - in most cases during normal
// operation the reason is a tooBig - another could be a
// damaged variable binding.
return SNMP_ERROR_TOO_BIG;
}
valid_flag = true;
// prevention of SNMP++ Enterprise Oid death
if ( enterprise.len() >0) {
raw_pdu->enterprise = 0;
raw_pdu->enterprise_length=0;
}
snmp_free_pdu( raw_pdu);
return SNMP_CLASS_SUCCESS;
}
