1 files changed, 138 insertions, 0 deletions
diff --git a/netwerk/base/NetworkDataCountLayer.cpp b/netwerk/base/NetworkDataCountLayer.cpp
new file mode 100644
index 0000000000..bee8bd1ee5
--- /dev/null
+++ b/netwerk/base/NetworkDataCountLayer.cpp
@@ -0,0 +1,138 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "NetworkDataCountLayer.h"
+#include "nsSocketTransportService2.h"
+#include "prmem.h"
+#include "prio.h"
+
+namespace mozilla {
+namespace net {
+
+static PRDescIdentity sNetworkDataCountLayerIdentity;
+static PRIOMethods sNetworkDataCountLayerMethods;
+static PRIOMethods* sNetworkDataCountLayerMethodsPtr = nullptr;
+
+class NetworkDataCountSecret {
+ public:
+  NetworkDataCountSecret() = default;
+
+  uint64_t mSentBytes = 0;
+  uint64_t mReceivedBytes = 0;
+};
+
+static PRInt32 NetworkDataCountSend(PRFileDesc* fd, const void* buf,
+                                    PRInt32 amount, PRIntn flags,
+                                    PRIntervalTime timeout) {
+  MOZ_RELEASE_ASSERT(fd->identity == sNetworkDataCountLayerIdentity);
+
+  NetworkDataCountSecret* secret =
+      reinterpret_cast<NetworkDataCountSecret*>(fd->secret);
+
+  PRInt32 rv =
+      (fd->lower->methods->send)(fd->lower, buf, amount, flags, timeout);
+  if (rv > 0) {
+    secret->mSentBytes += rv;
+  }
+  return rv;
+}
+
+static PRInt32 NetworkDataCountWrite(PRFileDesc* fd, const void* buf,
+                                     PRInt32 amount) {
+  return NetworkDataCountSend(fd, buf, amount, 0, PR_INTERVAL_NO_WAIT);
+}
+
+static PRInt32 NetworkDataCountRecv(PRFileDesc* fd, void* buf, PRInt32 amount,
+                                    PRIntn flags, PRIntervalTime timeout) {
+  MOZ_RELEASE_ASSERT(fd->identity == sNetworkDataCountLayerIdentity);
+
+  NetworkDataCountSecret* secret =
+      reinterpret_cast<NetworkDataCountSecret*>(fd->secret);
+
+  PRInt32 rv =
+      (fd->lower->methods->recv)(fd->lower, buf, amount, flags, timeout);
+  if (rv > 0) {
+    secret->mReceivedBytes += rv;
+  }
+  return rv;
+}
+
+static PRInt32 NetworkDataCountRead(PRFileDesc* fd, void* buf, PRInt32 amount) {
+  return NetworkDataCountRecv(fd, buf, amount, 0, PR_INTERVAL_NO_WAIT);
+}
+
+static PRStatus NetworkDataCountClose(PRFileDesc* fd) {
+  if (!fd) {
+    return PR_FAILURE;
+  }
+
+  PRFileDesc* layer = PR_PopIOLayer(fd, PR_TOP_IO_LAYER);
+
+  MOZ_RELEASE_ASSERT(layer && layer->identity == sNetworkDataCountLayerIdentity,
+                     "NetworkDataCount Layer not on top of stack");
+
+  NetworkDataCountSecret* secret =
+      reinterpret_cast<NetworkDataCountSecret*>(layer->secret);
+  layer->secret = nullptr;
+  layer->dtor(layer);
+  delete secret;
+  return fd->methods->close(fd);
+}
+
+nsresult AttachNetworkDataCountLayer(PRFileDesc* fd) {
+  if (!sNetworkDataCountLayerMethodsPtr) {
+    sNetworkDataCountLayerIdentity =
+        PR_GetUniqueIdentity("NetworkDataCount Layer");
+    sNetworkDataCountLayerMethods = *PR_GetDefaultIOMethods();
+    sNetworkDataCountLayerMethods.send = NetworkDataCountSend;
+    sNetworkDataCountLayerMethods.write = NetworkDataCountWrite;
+    sNetworkDataCountLayerMethods.recv = NetworkDataCountRecv;
+    sNetworkDataCountLayerMethods.read = NetworkDataCountRead;
+    sNetworkDataCountLayerMethods.close = NetworkDataCountClose;
+    sNetworkDataCountLayerMethodsPtr = &sNetworkDataCountLayerMethods;
+  }
+
+  PRFileDesc* layer = PR_CreateIOLayerStub(sNetworkDataCountLayerIdentity,
+                                           sNetworkDataCountLayerMethodsPtr);
+
+  if (!layer) {
+    return NS_ERROR_FAILURE;
+  }
+
+  NetworkDataCountSecret* secret = new NetworkDataCountSecret();
+
+  layer->secret = reinterpret_cast<PRFilePrivate*>(secret);
+
+  PRStatus status = PR_PushIOLayer(fd, PR_NSPR_IO_LAYER, layer);
+
+  if (status == PR_FAILURE) {
+    delete secret;
+    PR_Free(layer);  // PR_CreateIOLayerStub() uses PR_Malloc().
+    return NS_ERROR_FAILURE;
+  }
+  return NS_OK;
+}
+
+void NetworkDataCountSent(PRFileDesc* fd, uint64_t& sentBytes) {
+  PRFileDesc* ndcFd = PR_GetIdentitiesLayer(fd, sNetworkDataCountLayerIdentity);
+  MOZ_RELEASE_ASSERT(ndcFd);
+
+  NetworkDataCountSecret* secret =
+      reinterpret_cast<NetworkDataCountSecret*>(ndcFd->secret);
+  sentBytes = secret->mSentBytes;
+}
+
+void NetworkDataCountReceived(PRFileDesc* fd, uint64_t& receivedBytes) {
+  PRFileDesc* ndcFd = PR_GetIdentitiesLayer(fd, sNetworkDataCountLayerIdentity);
+  MOZ_RELEASE_ASSERT(ndcFd);
+
+  NetworkDataCountSecret* secret =
+      reinterpret_cast<NetworkDataCountSecret*>(ndcFd->secret);
+  receivedBytes = secret->mReceivedBytes;
+}
+
+}  // namespace net
+}  // namespace mozilla