这是一个内核驱动的一部分，碰到了一个奇怪的问题（可能是我脸太白……）
创建设备，指定IRP_MJ_DEVICE_CONTROL的处理函数为 RouterManager::IoDispatch，这里没什么问题。
NDIS_STATUS RouterManager::CreateMyDevice(){
NDIS_STATUS Status;
// Fill in the dispatch table array and register device
static PDRIVER_DISPATCH MajorFunction[IRP_MJ_MAXIMUM_FUNCTION + 1];
NdisZeroMemory(MajorFunction, sizeof(MajorFunction));
MajorFunction[IRP_MJ_CREATE] =
MajorFunction[IRP_MJ_CLOSE] =
MajorFunction[IRP_MJ_CLEANUP] =
MajorFunction[IRP_MJ_READ] =
MajorFunction[IRP_MJ_WRITE] =
MajorFunction[IRP_MJ_DEVICE_CONTROL] = RouterManager::IoDispatch;
Status = NdisMRegisterDevice(
*KNdisMiniDriver::DriverInstance(),
KNDIS_STRING_CONST("\\Device\\MwSysNdisRouter"),
KNDIS_STRING_CONST("\\DosDevices\\MwSysNdisRouter"),
MajorFunction,
&RouterManager::m_pDeviceObject,
&RouterManager::m_DeviceHandle);
T.Trace(__FUNCTION__"\tCreate Device: %s\n", ((Status) ? "FAILED" : "SUCCESS"));
return Status;
}
定义了一个结构体，简化为：
typedef struct _IO_COMMANDS_EXCHANGE_PARAMS {
UCHAR m_bytes[49];
bool IsEnable(){ return m_bytes[0] ? true : false; }
// index : 1 ~ 6 为mac地址，这里跳过。
ULONG GetIpAddr_RS(){
ULONG ip = 0;
memcpy(&ip, m_bytes + 7, sizeof(ULONG));
return ip;
}
PSTR GetIpAddrStr_RS(){
PSTR addr = new CHAR[16];
RtlSecureZeroMemory(addr, 16);
sprintf(addr, "%u.%u.%u.%u", m_bytes[10], m_bytes[9], m_bytes[8], m_bytes[7]);
return addr;
}
USHORT GetTcpPort_RS(){
USHORT tcpport = 0;
memcpy(&tcpport, m_bytes + 11, sizeof(USHORT));
return tcpport;
}
VOID PrintMBytes(){
T.Trace(__FUNCTION__"\t");
for(int index = 0; index < sizeof(m_bytes); index++){
T.Trace("-%02X", m_bytes[index]);
}
T.Trace("\n");
}
// .... 省略若干函数
} IO_COMMANDS_EXCHANGE_PARAMS, *P_IO_COMMANDS_EXCHANGE_PARAMS;
在RouterManager中定义了一个map
static map<string, P_IO_COMMANDS_EXCHANGE_PARAMS> T_MAP_EXC_EXT;
在RouterManager::IoDispatch中给这个map添加pair<string, P_IO_COMMANDS_EXCHANGE_PARAMS>
NTSTATUS RouterManager::IoDispatch (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
{
NTSTATUS Status = STATUS_SUCCESS;
static UCHAR response[] = {(UCHAR)4};
KIrp I(Irp);
// 首先要得到功能号
ULONG code = I.IoctlCode();
// 得到输入输出缓冲长度
ULONG in_len = I.IoctlInputBufferSize();
ULONG out_len = I.IoctlOutputBufferSize();
PVOID buffer = I.IoctlType3InputBuffer();
//ULONG_PTR informaiton = 0;
T.Trace(__FUNCTION__"\t code: %x, in_len: %u, out_len: %u.\n", code, in_len, out_len);
switch(code){
case IO_COMMANDS_EXCHANGE:
{
P_IO_COMMANDS_EXCHANGE_PARAMS params = (P_IO_COMMANDS_EXCHANGE_PARAMS)buffer;
// 这里各项输出正常
T.Trace(__FUNCTION__"\t case: %s; Enable: %s; \nMacAddress: %s; IpAddress: %s; Port: %u; \nMacAddress: %s; IpAddress: %s; Port: %u.\n"
, "IO_COMMANDS_EXCHANGE"
, ((params->IsEnable()) ? "True" : "False")
, params->GetMacStr_RS()
, params->GetIpAddrStr_RS()
, params->GetTcpPort_RS()
, params->GetMacStr_RC()
, params->GetIpAddrStr_RC()
, params->GetTcpPort_RC());
RouterManager::ExecCommandExchange(params);
I.Information() = 0;
}
break;
default:
T.Trace(__FUNCTION__"\t case: %s;\n", "default");
break;
}
return I.Complete(Status);
}
VOID RouterManager::ExecCommandExchange(P_IO_COMMANDS_EXCHANGE_PARAMS params){
PSTR rKey = params->GetRKey();
PSTR lKey = params->GetLKey();
params->PrintMBytes();
{ // 这里的输出也正常
T.Trace(__FUNCTION__"\t r: %u:%s:%u <--> %u:%s:%u.\n"
, params->GetIpAddr_RS()
, params->GetIpAddrStr_RS()
, params->GetTcpPort_RS()
, params->GetIpAddr_RC()
, params->GetIpAddrStr_RC()
, params->GetTcpPort_RC());
T.Trace(__FUNCTION__"\t l: %u:%s:%u <--> %u:%s:%u.\n"
, params->GetIpAddr_LS()
, params->GetIpAddrStr_LS()
, params->GetTcpPort_LS()
, params->GetIpAddr_LC()
, params->GetIpAddrStr_LC()
, params->GetTcpPort_LC());
}
{
map<string, P_IO_COMMANDS_EXCHANGE_PARAMS>::iterator it = RouterManager::T_MAP_EXC_EXT.find(rKey);
if(it == RouterManager::T_MAP_EXC_EXT.end()){
if(params->IsEnable()){
RouterManager::T_MAP_EXC_EXT.insert(pair<string, P_IO_COMMANDS_EXCHANGE_PARAMS>(rKey, params));
T.Trace(__FUNCTION__"\t Exchange map '%s'-'%s'.\n", rKey, lKey);
}
}else{
if(params->IsEnable())
it->second = params;
else
RouterManager::T_MAP_EXC_EXT.erase(it);
}
}
{
map<string, P_IO_COMMANDS_EXCHANGE_PARAMS>::iterator it = RouterManager::T_MAP_EXC_EXT.find(lKey);
if(it == RouterManager::T_MAP_EXC_EXT.end()){
if(params->IsEnable()){
RouterManager::T_MAP_EXC_EXT.insert(pair<string, P_IO_COMMANDS_EXCHANGE_PARAMS>(lKey, params));
T.Trace(__FUNCTION__"\t Exchange map '%s'-'%s'.\n", lKey, rKey);
}
}else{
if(params->IsEnable()){
it->second = params;
}
else{
RouterManager::T_MAP_EXC_EXT.erase(it);
}
}
}
if(0 <RouterManager::T_MAP_EXC_EXT.size()){
for(map<string, P_IO_COMMANDS_EXCHANGE_PARAMS>::iterator it = T_MAP_EXC_EXT.begin(); it != T_MAP_EXC_EXT.end(); ++it){
it->second->PrintMBytes(); // 这里的输出依旧没有问题
// 可是这里就出问题了，我在后面副一张图阐述问题。
T.Trace(__FUNCTION__"\t key: %s; rs: %s:%u; rc: %s:%u; ls: %s:%u; lc: %s:%u.\n"
, it->first
, it->second->GetIpAddrStr_RS()
, it->second->GetTcpPort_RS()
, it->second->GetIpAddrStr_RC()
, it->second->GetTcpPort_RC()
, it->second->GetIpAddrStr_LS()
, it->second->GetTcpPort_LS()
, it->second->GetIpAddrStr_LC()
, it->second->GetTcpPort_LC());
}
}
}
预期的输出是从B点开始，实际却从A点开始了，导致
T.Trace(__FUNCTION__"\t key: %s; rs: %s:%u; rc: %s:%u; ls: %s:%u; lc: %s:%u.\n",.....)
中，rs:部分是一段未知的结果，rc: 中是预期的rs部分的结果，后面的依次类推。
而且我在输出之前，打印了结构体中m_bytes的数据，与之前的打印做了对比，是一致的。
搞不清为什么输出的时候就“打歪了” - -!
希望我把问题描述清楚了，请大家不吝赐教，感谢！
