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发表于 2003-6-16 14:04:50
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a small program I've written up, so that hopefully other people won't have to go through the same learning curve I did with SNMP. I will also attach a file, snmpapi.cpp, that was written by Stas Khirman and distributed on his web page.
[code:1]snmpmac.cpp
#include <snmp.h>
#include <conio.h>
#include <stdio.h>
typedef BOOL(WINAPI * pSnmpExtensionInit) (
IN DWORD dwTimeZeroReference,
OUT HANDLE * hPollForTrapEvent,
OUT AsnObjectIdentifier * supportedView);
typedef BOOL(WINAPI * pSnmpExtensionTrap) (
OUT AsnObjectIdentifier * enterprise,
OUT AsnInteger * genericTrap,
OUT AsnInteger * specificTrap,
OUT AsnTimeticks * timeStamp,
OUT RFC1157VarBindList * variableBindings);
typedef BOOL(WINAPI * pSnmpExtensionQuery) (
IN BYTE requestType,
IN OUT RFC1157VarBindList * variableBindings,
OUT AsnInteger * errorStatus,
OUT AsnInteger * errorIndex);
typedef BOOL(WINAPI * pSnmpExtensionInitEx) (
OUT AsnObjectIdentifier * supportedView);
void main()
{
WSADATA WinsockData;
if (WSAStartup(MAKEWORD(2, 0), &WinsockData) != 0) {
fprintf(stderr, "This program requires Winsock 2.x!\n");
return;
}
HINSTANCE m_hInst;
pSnmpExtensionInit m_Init;
pSnmpExtensionInitEx m_InitEx;
pSnmpExtensionQuery m_Query;
pSnmpExtensionTrap m_Trap;
HANDLE PollForTrapEvent;
AsnObjectIdentifier SupportedView;
UINT OID_ifEntryType[] = {
1, 3, 6, 1, 2, 1, 2, 2, 1, 3
};
UINT OID_ifEntryNum[] = {
1, 3, 6, 1, 2, 1, 2, 1
};
UINT OID_ipMACEntAddr[] = {
1, 3, 6, 1, 2, 1, 2, 2, 1, 6
}; //, 1 ,6 };
AsnObjectIdentifier MIB_ifMACEntAddr =
{ sizeof(OID_ipMACEntAddr) / sizeof(UINT), OID_ipMACEntAddr };
AsnObjectIdentifier MIB_ifEntryType = {
sizeof(OID_ifEntryType) / sizeof(UINT), OID_ifEntryType
};
AsnObjectIdentifier MIB_ifEntryNum = {
sizeof(OID_ifEntryNum) / sizeof(UINT), OID_ifEntryNum
};
RFC1157VarBindList varBindList;
RFC1157VarBind varBind[2];
AsnInteger errorStatus;
AsnInteger errorIndex;
AsnObjectIdentifier MIB_NULL = {
0, 0
};
int ret;
int dtmp;
int i = 0, j = 0;
BOOL found = FALSE;
char TempEthernet[13];
m_Init = NULL;
m_InitEx = NULL;
m_Query = NULL;
m_Trap = NULL;
/* Load the SNMP dll and get the addresses of the functions
necessary */
m_hInst = LoadLibrary("inetmib1.dll");
if (m_hInst < (HINSTANCE) HINSTANCE_ERROR) {
m_hInst = NULL;
return;
}
m_Init =
(pSnmpExtensionInit) GetProcAddress(m_hInst, "SnmpExtensionInit");
m_InitEx =
(pSnmpExtensionInitEx) GetProcAddress(m_hInst,
"SnmpExtensionInitEx");
m_Query =
(pSnmpExtensionQuery) GetProcAddress(m_hInst,
"SnmpExtensionQuery");
m_Trap =
(pSnmpExtensionTrap) GetProcAddress(m_hInst, "SnmpExtensionTrap");
m_Init(GetTickCount(), &PollForTrapEvent, &SupportedView);
/* Initialize the variable list to be retrieved by m_Query */
varBindList.list = varBind;
varBind[0].name = MIB_NULL;
varBind[1].name = MIB_NULL;
/* Copy in the OID to find the number of entries in the
Inteface table */
varBindList.len = 1; /* Only retrieving one item */
SNMP_oidcpy(&varBind[0].name, &MIB_ifEntryNum);
ret =
m_Query(ASN_RFC1157_GETNEXTREQUEST, &varBindList, &errorStatus,
&errorIndex);
printf("# of adapters in this system : %i\n",
varBind[0].value.asnValue.number); varBindList.len = 2;
/* Copy in the OID of ifType, the type of interface */
SNMP_oidcpy(&varBind[0].name, &MIB_ifEntryType);
/* Copy in the OID of ifPhysAddress, the address */
SNMP_oidcpy(&varBind[1].name, &MIB_ifMACEntAddr);
do {
/* Submit the query. Responses will be loaded into varBindList.
We can expect this call to succeed a # of times corresponding
to the # of adapters reported to be in the system */
ret =
m_Query(ASN_RFC1157_GETNEXTREQUEST, &varBindList, &errorStatus,
&errorIndex); if (!ret) ret = 1;
else
/* Confirm that the proper type has been returned */
ret =
SNMP_oidncmp(&varBind[0].name, &MIB_ifEntryType,
MIB_ifEntryType.idLength); if (!ret) {
j++;
dtmp = varBind[0].value.asnValue.number;
printf("Interface #%i type : %i\n", j, dtmp);
/* Type 6 describes ethernet interfaces */
if (dtmp == 6) {
/* Confirm that we have an address here */
ret =
SNMP_oidncmp(&varBind[1].name, &MIB_ifMACEntAddr,
MIB_ifMACEntAddr.idLength);
if ((!ret)
&& (varBind[1].value.asnValue.address.stream != NULL)) {
if (
(varBind[1].value.asnValue.address.stream[0] ==
0x44)
&& (varBind[1].value.asnValue.address.stream[1] ==
0x45)
&& (varBind[1].value.asnValue.address.stream[2] ==
0x53)
&& (varBind[1].value.asnValue.address.stream[3] ==
0x54)
&& (varBind[1].value.asnValue.address.stream[4] ==
0x00)) {
/* Ignore all dial-up networking adapters */
printf("Interface #%i is a DUN adapter\n", j);
continue;
}
if (
(varBind[1].value.asnValue.address.stream[0] ==
0x00)
&& (varBind[1].value.asnValue.address.stream[1] ==
0x00)
&& (varBind[1].value.asnValue.address.stream[2] ==
0x00)
&& (varBind[1].value.asnValue.address.stream[3] ==
0x00)
&& (varBind[1].value.asnValue.address.stream[4] ==
0x00)
&& (varBind[1].value.asnValue.address.stream[5] ==
0x00)) {
/* Ignore NULL addresses returned by other network
interfaces */
printf("Interface #%i is a NULL address\n", j);
continue;
}
sprintf(TempEthernet, "%02x%02x%02x%02x%02x%02x",
varBind[1].value.asnValue.address.stream[0],
varBind[1].value.asnValue.address.stream[1],
varBind[1].value.asnValue.address.stream[2],
varBind[1].value.asnValue.address.stream[3],
varBind[1].value.asnValue.address.stream[4],
varBind[1].value.asnValue.address.stream[5]);
printf("MAC Address of interface #%i: %s\n", j,
TempEthernet);}
}
}
} while (!ret); /* Stop only on an error. An error will occur
when we go exhaust the list of interfaces to
be examined */
getch();
/* Free the bindings */
SNMP_FreeVarBind(&varBind[0]);
SNMP_FreeVarBind(&varBind[1]);
}
[/code:1]
[code:1]snmpapi.cpp
/******************************************************************
*
* Copyright (C) Stas Khirman 1998. All rights reserved.
*
* This program is distributed WITHOUT ANY WARRANTY
*
*******************************************************************/
/*************************************************
*
* Reproduction of SNMP.LIB and SNMPAPI.LIB base
* functions
*
* Author: Stas Khirman ([email protected])
*
*
* Free software: no warranty; use anywhere is ok; spread the
* sources; note any modifications; share variations and
* derivatives (including sending to [email protected]).
*
*
*************************************************/
#include <snmp.h>
SNMPAPI
SNMP_FUNC_TYPE
SnmpUtilOidCpy(
OUT AsnObjectIdentifier *DstObjId,
IN AsnObjectIdentifier *SrcObjId
)
{
DstObjId->ids = (UINT *)GlobalAlloc(GMEM_ZEROINIT,SrcObjId->idLength *
sizeof(UINT));
if(!DstObjId->ids){
SetLastError(1);
return 0;
}
memcpy(DstObjId->ids,SrcObjId->ids,SrcObjId->idLength*sizeof(UINT));
DstObjId->idLength = SrcObjId->idLength;
return 1;
}
VOID
SNMP_FUNC_TYPE
SnmpUtilOidFree(
IN OUT AsnObjectIdentifier *ObjId
)
{
GlobalFree(ObjId->ids);
ObjId->ids = 0;
ObjId->idLength = 0;
}
SNMPAPI
SNMP_FUNC_TYPE
SnmpUtilOidNCmp(
IN AsnObjectIdentifier *ObjIdA,
IN AsnObjectIdentifier *ObjIdB,
IN UINT Len
)
{
UINT CmpLen;
UINT i;
int res;
CmpLen = Len;
if(ObjIdA->idLength < CmpLen)
CmpLen = ObjIdA->idLength;
if(ObjIdB->idLength < CmpLen)
CmpLen = ObjIdB->idLength;
for(i=0;i<CmpLen;i++){
res = ObjIdA->ids[i] - ObjIdB->ids[i];
if(res!=0)
return res;
}
return 0;
}
VOID
SNMP_FUNC_TYPE
SnmpUtilVarBindFree(
IN OUT RFC1157VarBind *VarBind
)
{
BYTE asnType;
// free object name
SnmpUtilOidFree(&VarBind->name);
asnType = VarBind->value.asnType;
if(asnType==ASN_OBJECTIDENTIFIER){
SnmpUtilOidFree(&VarBind->value.asnValue.object);
}
else if(
(asnType==ASN_OCTETSTRING) ||
(asnType==ASN_RFC1155_IPADDRESS) ||
(asnType==ASN_RFC1155_OPAQUE) ||
(asnType==ASN_SEQUENCE)){
if(VarBind->value.asnValue.string.dynamic){
GlobalFree(VarBind->value.asnValue.string.stream);
}
}
VarBind->value.asnType = ASN_NULL;
}
[/code:1] |
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