使用SNMP编辑（添加/删除/修改）ARP表
2010-07-20 20:44:55 来源：WEB开发网得到ARP条目
函数GetEntries类似arp.exe -a,可以得到ARP条目，函数有三个参数：
PTable指针指向arpTable结构数组，用于填充IP和MAC地址。
TableLength是数组长度
AdapterIndex是NIC适配器的编号。
我使用3个OID来得到ARP表条目：
OID[0] = "1.3.6.1.2.1.4.22.1.1" ，得到接口索引号。
然后和OID[1] = "1.3.6.1.2.1.4.22.1.2"比较，得到IP和MAC地址
OID[2] = "1.3.6.1.2.1.4.22.1.4", 得到条目类型(静态或动态)//-----------------------------------------------------------------------
// Function: GetEntries: Read ARP table for specific NIC interface.
//
// Parameters:
// pTable Pointer to array of arpTable struct
// TableLength Length of the array
// AdapterIndex NIC Adapter index number
//
// Returns:
// Number of read ARP entries
//-----------------------------------------------------------------------
int CARP::GetEntries(arpTable* pTable, int TableLength, int AdapterIndex)
{
// Be sure initialize SNMP true
if (!bInitialized)
return 0;
SnmpVarBindList SVBList[3];
SnmpVarBind SVBVars[3];
UINT OID[3][10];
AsnInteger32 aiErrorStatus[3], aiErrorIndex[3];
AsnObjectIdentifier AsnOID0 = {sizeof(OID[0])/sizeof(UINT), OID[0]};
AsnObjectIdentifier AsnOID1 = {sizeof(OID[1])/sizeof(UINT), OID[1]};
AsnObjectIdentifier AsnOID2 = {sizeof(OID[2])/sizeof(UINT), OID[2]};
unsigned long pIPAddress;
unsigned long pMACAddress;
int iEntries;
//-----------------------------------------------------------------------
// Fill array of 3 OIDs
//
// OID[0] : "1.3.6.1.2.1.4.22.1.1", ipNetToMediaIfIndex
// The interface on which this entry's equivalence is effective
//
// OID[1] : "1.3.6.1.2.1.4.22.1.2", ipNetToMediaPhysAddress
// The media-dependent 'physical' address
//
// OID[2] : "1.3.6.1.2.1.4.22.1.4", ipNetToMediaType
// Entry type: 1:Other, 2:Invalid(Remove), 3:Dynamic, 4:Static
//
for (int count=0; count<3; count++)
{
OID[count][0] = 1;
OID[count][1] = 3;
OID[count][2] = 6;
OID[count][3] = 1;
OID[count][4] = 2;
OID[count][5] = 1;
OID[count][6] = 4;
OID[count][7] = 22;
OID[count][8] = 1;
switch(count)
{
case 0:
// Adapter interface
OID[count][9] = 1;
break;
case 1:
// MAC address
OID[count][9] = 2;
break;
case 2:
// Entry Type
OID[count][9] = 4;
break;
}
}
ZeroMemory(pTable, sizeof(arpTable)*TableLength);
SVBList[0].len = 1;
SVBList[0].list = &SVBVars[0];
SnmpUtilOidCpy(&SVBVars[0].name, &AsnOID0);
SVBList[1].len = 1;
SVBList[1].list = &SVBVars[1];
SnmpUtilOidCpy(&SVBVars[1].name, &AsnOID1);
SVBList[2].len = 1;
SVBList[2].list = &SVBVars[2];
SnmpUtilOidCpy(&SVBVars[2].name, &AsnOID2);
iEntries = 0;
do
{
aiErrorStatus[0] = 0;
aiErrorIndex[0] = 0;
aiErrorStatus[1] = 0;
aiErrorIndex[1] = 0;
aiErrorStatus[2] = 0;
aiErrorIndex[2] = 0;
// Query information of 3 OIDs
if (pfnSnmpExtensionQuery(SNMP_PDU_GETNEXT, &SVBList[0], &aiErrorStatus[0], &aiErrorIndex[0]))
if (pfnSnmpExtensionQuery(SNMP_PDU_GETNEXT, &SVBList[1], &aiErrorStatus[1], &aiErrorIndex[1]))
if (pfnSnmpExtensionQuery(SNMP_PDU_GETNEXT, &SVBList[2], &aiErrorStatus[2], &aiErrorIndex[2]))
if (aiErrorStatus[0] == SNMP_ERRORSTATUS_NOERROR &&
aiErrorStatus[1] == SNMP_ERRORSTATUS_NOERROR &&
aiErrorStatus[2] == SNMP_ERRORSTATUS_NOERROR) // Check for error
{
//-----------------------------------------------------------------------
// From MSDN Help: http://msdn2.microsoft.com/en-us/library/aa378021.aspx
//
// If the extension agent cannot resolve the variable bindings on a Get Next request,
// it must change the name field of the SnmpVarBind structure to the value of the object
// identifier immediately following that of the currently supported MIB subtree view.
// For example, if the extension agent supports view ".1.3.6.1.4.1.77.1", a Get Next
// request on ".1.3.6.1.4.1.77.1.5.1" would result in a modified name field of ".1.3.6.1.4.1.77.2".
// This signals the SNMP service to continue the attempt to resolve the variable bindings
// with other extension agents
//-----------------------------------------------------------------------
if(SnmpUtilOidNCmp(&SVBVars[0].name, &AsnOID0, AsnOID0.idLength))
break;
if(SnmpUtilOidNCmp(&SVBVars[1].name, &AsnOID1, AsnOID1.idLength))
break;
if(SnmpUtilOidNCmp(&SVBVars[2].name, &AsnOID2, AsnOID2.idLength))
break;
// Verify selected Adapter interface
if (AdapterIndex == SVBList[0].list->value.asnValue.number)
{
// pIPAddress get pointer ro IP Address
pIPAddress = (unsigned long)SVBList[1].list->name.ids;
pTable[iEntries].IPAddress[0] = *(unsigned char *)(pIPAddress + 44);
pTable[iEntries].IPAddress[1] = *(unsigned char *)(pIPAddress + 48);
pTable[iEntries].IPAddress[2] = *(unsigned char *)(pIPAddress + 52);
pTable[iEntries].IPAddress[3] = *(unsigned char *)(pIPAddress + 56);
// pIPAddress get pointer ro MAC Address
pMACAddress = (unsigned long)SVBList[1].list->value.asnValue.string.stream;
if (pMACAddress)
{
pTable[iEntries].MACAddress[0] = *(unsigned char *)(pMACAddress + 0);
pTable[iEntries].MACAddress[1] = *(unsigned char *)(pMACAddress + 1);
pTable[iEntries].MACAddress[2] = *(unsigned char *)(pMACAddress + 2);
pTable[iEntries].MACAddress[3] = *(unsigned char *)(pMACAddress + 3);
pTable[iEntries].MACAddress[4] = *(unsigned char *)(pMACAddress + 4);
pTable[iEntries].MACAddress[5] = *(unsigned char *)(pMACAddress + 5);
}
// Entry Type
pTable[iEntries].Type = (unsigned long)SVBList[2].list->value.asnValue.number;
// Type must be one of (1, 2, 3, 4)
if (pTable[iEntries].Type>=1 && pTable[iEntries].Type<=4)
iEntries++; // Move to next array position
}
}
else
break; // If error exit do-while
}
while(iEntries < TableLength);
// Frees the memory allocated for the specified object identifiers
SnmpUtilOidFree(&SVBVars[2].name);
SnmpUtilOidFree(&SVBVars[1].name);
SnmpUtilOidFree(&SVBVars[0].name);
return iEntries; // Return number of Entries
}
中查找“使用SNMP编辑（添加/删除/修改）ARP表”更多相关内容
中查找“使用SNMP编辑（添加/删除/修改）ARP表”更多相关内容更多精彩
赞助商链接
