Merge pull request #11089 from sepalani/pcap-share

NetworkCaptureLogger: Allow PCAP shared read access on Windows

Source/Core/Common/IOFile.cpp

@@ -35,9 +35,10 @@ IOFile::IOFile(std::FILE* file) : m_file(file), m_good(true)
 {
 }
 
-IOFile::IOFile(const std::string& filename, const char openmode[]) : m_file(nullptr), m_good(true)
+IOFile::IOFile(const std::string& filename, const char openmode[], SharedAccess sh)
+    : m_file(nullptr), m_good(true)
 {
-  Open(filename, openmode);
+  Open(filename, openmode, sh);
 }
 
 IOFile::~IOFile()
@@ -62,12 +63,21 @@ void IOFile::Swap(IOFile& other) noexcept
   std::swap(m_good, other.m_good);
 }
 
-bool IOFile::Open(const std::string& filename, const char openmode[])
+bool IOFile::Open(const std::string& filename, const char openmode[],
+                  [[maybe_unused]] SharedAccess sh)
 {
   Close();
 
 #ifdef _WIN32
+  if (sh == SharedAccess::Default)
+  {
     m_good = _tfopen_s(&m_file, UTF8ToTStr(filename).c_str(), UTF8ToTStr(openmode).c_str()) == 0;
+  }
+  else if (sh == SharedAccess::Read)
+  {
+    m_file = _tfsopen(UTF8ToTStr(filename).c_str(), UTF8ToTStr(openmode).c_str(), SH_DENYWR);
+    m_good = m_file != nullptr;
+  }
 #else
 #ifdef ANDROID
   if (IsPathAndroidContent(filename))

Source/Core/Common/IOFile.h

@@ -20,6 +20,12 @@ enum class SeekOrigin
   End,
 };
 
+enum class SharedAccess
+{
+  Default,
+  Read,
+};
+
 // simple wrapper for cstdlib file functions to
 // hopefully will make error checking easier
 // and make forgetting an fclose() harder
@@ -28,7 +34,8 @@ class IOFile
 public:
   IOFile();
   IOFile(std::FILE* file);
-  IOFile(const std::string& filename, const char openmode[]);
+  IOFile(const std::string& filename, const char openmode[],
+         SharedAccess sh = SharedAccess::Default);
 
   ~IOFile();
 
@@ -40,7 +47,8 @@ public:
 
   void Swap(IOFile& other) noexcept;
 
-  bool Open(const std::string& filename, const char openmode[]);
+  bool Open(const std::string& filename, const char openmode[],
+            SharedAccess sh = SharedAccess::Default);
   bool Close();
 
   template <typename T>

Source/Core/Core/NetworkCaptureLogger.cpp

@@ -83,8 +83,8 @@ PCAPSSLCaptureLogger::PCAPSSLCaptureLogger()
   const std::string filepath =
       fmt::format("{}{} {:%Y-%m-%d %Hh%Mm%Ss}.pcap", File::GetUserPath(D_DUMPSSL_IDX),
                   SConfig::GetInstance().GetGameID(), fmt::localtime(std::time(nullptr)));
-  m_file = std::make_unique<Common::PCAP>(new File::IOFile(filepath, "wb"),
+  m_file = std::make_unique<Common::PCAP>(
-                                          Common::PCAP::LinkType::Ethernet);
+      new File::IOFile(filepath, "wb", File::SharedAccess::Read), Common::PCAP::LinkType::Ethernet);
 }
 
 PCAPSSLCaptureLogger::~PCAPSSLCaptureLogger() = default;