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DEV9: Use unique_ptr to manage buffer lifetime

This commit is contained in:
TheLastRar 2021-02-11 22:16:18 +00:00 committed by refractionpcsx2
parent a8d1a7cba1
commit c121b180be
1 changed files with 10 additions and 16 deletions
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26
pcsx2/DEV9/pcap_io.cpp
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@ -14,6 +14,7 @@
*/
#include "PrecompiledHeader.h"
#include <memory>
#ifdef _WIN32
#include <winsock2.h>
@ -54,12 +55,12 @@ mac_address host_mac;
//IP_ADAPTER_ADDRESSES is a structure that contains ptrs to data in other regions
//of the buffer, se we need to return both so the caller can free the buffer
//after it's finished reading the needed data from IP_ADAPTER_ADDRESSES
bool GetWin32Adapter(const char* name, PIP_ADAPTER_ADDRESSES adapter, PIP_ADAPTER_ADDRESSES* buffer)
bool GetWin32Adapter(const char* name, PIP_ADAPTER_ADDRESSES adapter, std::unique_ptr<IP_ADAPTER_ADDRESSES[]>* buffer)
{
const int guidindex = strlen("\\Device\\NPF_");
int neededSize = 128;
PIP_ADAPTER_ADDRESSES AdapterInfo = new IP_ADAPTER_ADDRESSES[neededSize];
std::unique_ptr<IP_ADAPTER_ADDRESSES[]> AdapterInfo = std::make_unique<IP_ADAPTER_ADDRESSES[]>(neededSize);
ULONG dwBufLen = sizeof(IP_ADAPTER_ADDRESSES) * neededSize;
PIP_ADAPTER_ADDRESSES pAdapterInfo;
@ -68,15 +69,14 @@ bool GetWin32Adapter(const char* name, PIP_ADAPTER_ADDRESSES adapter, PIP_ADAPTE
AF_UNSPEC,
GAA_FLAG_INCLUDE_PREFIX,
NULL,
AdapterInfo,
AdapterInfo.get(),
&dwBufLen);
if (dwStatus == ERROR_BUFFER_OVERFLOW)
{
DevCon.WriteLn("GetWin32Adapter() buffer too small, resizing");
delete[] AdapterInfo;
neededSize = dwBufLen / sizeof(IP_ADAPTER_ADDRESSES) + 1;
AdapterInfo = new IP_ADAPTER_ADDRESSES[neededSize];
AdapterInfo = std::make_unique<IP_ADAPTER_ADDRESSES[]>(neededSize);
dwBufLen = sizeof(IP_ADAPTER_ADDRESSES) * neededSize;
DevCon.WriteLn("New size %i", neededSize);
@ -84,27 +84,25 @@ bool GetWin32Adapter(const char* name, PIP_ADAPTER_ADDRESSES adapter, PIP_ADAPTE
AF_UNSPEC,
GAA_FLAG_INCLUDE_PREFIX,
NULL,
AdapterInfo,
AdapterInfo.get(),
&dwBufLen);
}
if (dwStatus != ERROR_SUCCESS)
return false;
pAdapterInfo = AdapterInfo;
pAdapterInfo = AdapterInfo.get();
do
{
if (0 == strcmp(pAdapterInfo->AdapterName, &name[guidindex]))
{
*adapter = *pAdapterInfo;
*buffer = AdapterInfo;
buffer->swap(AdapterInfo);
return true;
}
pAdapterInfo = pAdapterInfo->Next;
} while (pAdapterInfo);
delete[] AdapterInfo;
return false;
}
#endif
@ -115,12 +113,11 @@ int GetMACAddress(char* adapter, mac_address* addr)
int retval = 0;
#ifdef _WIN32
IP_ADAPTER_ADDRESSES adapterInfo;
PIP_ADAPTER_ADDRESSES buffer;
std::unique_ptr<IP_ADAPTER_ADDRESSES[]> buffer;
if (GetWin32Adapter(adapter, &adapterInfo, &buffer))
{
memcpy(addr, adapterInfo.PhysicalAddress, 6);
delete[] buffer;
retval = 1;
}
@ -405,13 +402,10 @@ std::vector<AdapterEntry> PCAPAdapter::GetAdapters()
entry.guid = std::wstring(wEth);
IP_ADAPTER_ADDRESSES adapterInfo;
PIP_ADAPTER_ADDRESSES buffer;
std::unique_ptr<IP_ADAPTER_ADDRESSES[]> buffer;
if (GetWin32Adapter(d->name, &adapterInfo, &buffer))
{
entry.name = std::wstring(adapterInfo.FriendlyName);
delete[] buffer;
}
else
{
//have to use description