Set send buffer size for P2P UDP sockets.

On windows the default send buffer is too small. Set it explicitly to prevent packets from being lost when sending.

BUG=None
TEST=None


Review URL: http://codereview.chromium.org/8304008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@105995 0039d316-1c4b-4281-b951-d872f2087c98

11 files changed, 96 insertions, 19 deletions

diff --git a/content/browser/renderer_host/p2p/socket_host_udp.cc b/content/browser/renderer_host/p2p/socket_host_udp.cc
index 1e08272..388eb92 100644
--- a/content/browser/renderer_host/p2p/socket_host_udp.cc
+++ b/content/browser/renderer_host/p2p/socket_host_udp.cc
@@ -14,6 +14,9 @@ namespace {
 // UDP packets cannot be bigger than 64k.
 const int kReadBufferSize = 65536;
 
+// Send buffer size for the socket.
+const int kSendBufferSize = 65536;
+
 }  // namespace
 
 namespace content {
@@ -47,6 +50,9 @@ bool P2PSocketHostUdp::Init(const net::IPEndPoint& local_address,
     return false;
   }
 
+  if (!socket_->SetSendBufferSize(kSendBufferSize))
+    LOG(WARNING) << "Failed to set send buffer size for UDP socket.";
+
   net::IPEndPoint address;
   result = socket_->GetLocalAddress(&address);
   if (result < 0) {
@@ -55,7 +61,6 @@ bool P2PSocketHostUdp::Init(const net::IPEndPoint& local_address,
     OnError();
     return false;
   }
-
   VLOG(1) << "Local address: " << address.ToString();
 
   state_ = STATE_OPEN;
diff --git a/content/browser/renderer_host/p2p/socket_host_udp_unittest.cc b/content/browser/renderer_host/p2p/socket_host_udp_unittest.cc
index bcc6716..a33bc83 100644
--- a/content/browser/renderer_host/p2p/socket_host_udp_unittest.cc
+++ b/content/browser/renderer_host/p2p/socket_host_udp_unittest.cc
@@ -81,6 +81,14 @@ class FakeDatagramServerSocket : public net::DatagramServerSocket {
     return buf_len;
   }
 
+  virtual bool SetReceiveBufferSize(int32 size) OVERRIDE {
+    return true;
+  }
+
+  virtual bool SetSendBufferSize(int32 size) OVERRIDE {
+    return true;
+  }
+
   void ReceivePacket(const net::IPEndPoint& address, std::vector<char> data) {
     if (recv_callback_) {
       int size = std::min(recv_size_, static_cast<int>(data.size()));
diff --git a/net/udp/datagram_server_socket.h b/net/udp/datagram_server_socket.h
index 9b43f36..cd20191 100644
--- a/net/udp/datagram_server_socket.h
+++ b/net/udp/datagram_server_socket.h
@@ -54,6 +54,12 @@ class NET_EXPORT DatagramServerSocket : public DatagramSocket {
                      int buf_len,
                      const IPEndPoint& address,
                      OldCompletionCallback* callback) = 0;
+
+  // Set the receive buffer size (in bytes) for the socket.
+  virtual bool SetReceiveBufferSize(int32 size) = 0;
+
+  // Set the send buffer size (in bytes) for the socket.
+  virtual bool SetSendBufferSize(int32 size) = 0;
 };
 
 }  // namespace net
diff --git a/net/udp/udp_client_socket.cc b/net/udp/udp_client_socket.cc
index 96c4c33..e5cef3e 100644
--- a/net/udp/udp_client_socket.cc
+++ b/net/udp/udp_client_socket.cc
@@ -47,11 +47,11 @@ int UDPClientSocket::GetLocalAddress(IPEndPoint* address) const {
 }
 
 bool UDPClientSocket::SetReceiveBufferSize(int32 size) {
-  return true;
+  return socket_.SetReceiveBufferSize(size);
 }
 
 bool UDPClientSocket::SetSendBufferSize(int32 size) {
-  return true;
+  return socket_.SetSendBufferSize(size);
 }
 
 const BoundNetLog& UDPClientSocket::NetLog() const {
diff --git a/net/udp/udp_client_socket.h b/net/udp/udp_client_socket.h
index 7aa4a7f..cf37a736 100644
--- a/net/udp/udp_client_socket.h
+++ b/net/udp/udp_client_socket.h
@@ -25,15 +25,17 @@ class NET_EXPORT_PRIVATE UDPClientSocket : public DatagramClientSocket {
   virtual ~UDPClientSocket();
 
   // Implement DatagramClientSocket:
-  virtual int Connect(const IPEndPoint& address);
-  virtual int Read(IOBuffer* buf, int buf_len, OldCompletionCallback* callback);
-  virtual int Write(IOBuffer* buf, int buf_len, OldCompletionCallback* callback);
-  virtual void Close();
-  virtual int GetPeerAddress(IPEndPoint* address) const;
-  virtual int GetLocalAddress(IPEndPoint* address) const;
-  virtual bool SetReceiveBufferSize(int32 size);
-  virtual bool SetSendBufferSize(int32 size);
-  virtual const BoundNetLog& NetLog() const;
+  virtual int Connect(const IPEndPoint& address) OVERRIDE;
+  virtual int Read(IOBuffer* buf, int buf_len,
+                   OldCompletionCallback* callback) OVERRIDE;
+  virtual int Write(IOBuffer* buf, int buf_len,
+                    OldCompletionCallback* callback) OVERRIDE;
+  virtual void Close() OVERRIDE;
+  virtual int GetPeerAddress(IPEndPoint* address) const OVERRIDE;
+  virtual int GetLocalAddress(IPEndPoint* address) const OVERRIDE;
+  virtual bool SetReceiveBufferSize(int32 size) OVERRIDE;
+  virtual bool SetSendBufferSize(int32 size) OVERRIDE;
+  virtual const BoundNetLog& NetLog() const OVERRIDE;
 
  private:
   UDPSocket socket_;
diff --git a/net/udp/udp_server_socket.cc b/net/udp/udp_server_socket.cc
index 54391c5..7958463 100644
--- a/net/udp/udp_server_socket.cc
+++ b/net/udp/udp_server_socket.cc
@@ -37,6 +37,14 @@ int UDPServerSocket::SendTo(IOBuffer* buf,
   return socket_.SendTo(buf, buf_len, address, callback);
 }
 
+bool UDPServerSocket::SetReceiveBufferSize(int32 size) {
+  return socket_.SetReceiveBufferSize(size);
+}
+
+bool UDPServerSocket::SetSendBufferSize(int32 size) {
+  return socket_.SetSendBufferSize(size);
+}
+
 void UDPServerSocket::Close() {
   socket_.Close();
 }
diff --git a/net/udp/udp_server_socket.h b/net/udp/udp_server_socket.h
index 92dfef3..bb6ac5c 100644
--- a/net/udp/udp_server_socket.h
+++ b/net/udp/udp_server_socket.h
@@ -23,19 +23,21 @@ class NET_EXPORT UDPServerSocket : public DatagramServerSocket {
   virtual ~UDPServerSocket();
 
   // Implement DatagramServerSocket:
-  virtual int Listen(const IPEndPoint& address);
+  virtual int Listen(const IPEndPoint& address) OVERRIDE;
   virtual int RecvFrom(IOBuffer* buf,
                        int buf_len,
                        IPEndPoint* address,
-                       OldCompletionCallback* callback);
+                       OldCompletionCallback* callback) OVERRIDE;
   virtual int SendTo(IOBuffer* buf,
                      int buf_len,
                      const IPEndPoint& address,
-                     OldCompletionCallback* callback);
-  virtual void Close();
-  virtual int GetPeerAddress(IPEndPoint* address) const;
-  virtual int GetLocalAddress(IPEndPoint* address) const;
-  virtual const BoundNetLog& NetLog() const;
+                     OldCompletionCallback* callback) OVERRIDE;
+  virtual bool SetReceiveBufferSize(int32 size) OVERRIDE;
+  virtual bool SetSendBufferSize(int32 size) OVERRIDE;
+  virtual void Close() OVERRIDE;
+  virtual int GetPeerAddress(IPEndPoint* address) const OVERRIDE;
+  virtual int GetLocalAddress(IPEndPoint* address) const OVERRIDE;
+  virtual const BoundNetLog& NetLog() const OVERRIDE;
 
  private:
   UDPSocket socket_;
diff --git a/net/udp/udp_socket_libevent.cc b/net/udp/udp_socket_libevent.cc
index 33f9edd..1e790df 100644
--- a/net/udp/udp_socket_libevent.cc
+++ b/net/udp/udp_socket_libevent.cc
@@ -218,6 +218,7 @@ int UDPSocketLibevent::SendToOrWrite(IOBuffer* buf,
 }
 
 int UDPSocketLibevent::Connect(const IPEndPoint& address) {
+  DCHECK(CalledOnValidThread());
   DCHECK(!is_connected());
   DCHECK(!remote_address_.get());
   int rv = CreateSocket(address);
@@ -246,6 +247,7 @@ int UDPSocketLibevent::Connect(const IPEndPoint& address) {
 }
 
 int UDPSocketLibevent::Bind(const IPEndPoint& address) {
+  DCHECK(CalledOnValidThread());
   DCHECK(!is_connected());
   int rv = CreateSocket(address);
   if (rv < 0)
@@ -257,6 +259,22 @@ int UDPSocketLibevent::Bind(const IPEndPoint& address) {
   return rv;
 }
 
+bool UDPSocketLibevent::SetReceiveBufferSize(int32 size) {
+  DCHECK(CalledOnValidThread());
+  int rv = setsockopt(socket_, SOL_SOCKET, SO_RCVBUF,
+                      reinterpret_cast<const char*>(&size), sizeof(size));
+  DCHECK(!rv) << "Could not set socket receive buffer size: " << errno;
+  return rv == 0;
+}
+
+bool UDPSocketLibevent::SetSendBufferSize(int32 size) {
+  DCHECK(CalledOnValidThread());
+  int rv = setsockopt(socket_, SOL_SOCKET, SO_SNDBUF,
+                      reinterpret_cast<const char*>(&size), sizeof(size));
+  DCHECK(!rv) << "Could not set socket send buffer size: " << errno;
+  return rv == 0;
+}
+
 void UDPSocketLibevent::DoReadCallback(int rv) {
   DCHECK_NE(rv, ERR_IO_PENDING);
   DCHECK(read_callback_);
diff --git a/net/udp/udp_socket_libevent.h b/net/udp/udp_socket_libevent.h
index d6a99b1..6bdf4d4 100644
--- a/net/udp/udp_socket_libevent.h
+++ b/net/udp/udp_socket_libevent.h
@@ -94,6 +94,12 @@ class UDPSocketLibevent : public base::NonThreadSafe {
              const IPEndPoint& address,
              OldCompletionCallback* callback);
 
+  // Set the receive buffer size (in bytes) for the socket.
+  bool SetReceiveBufferSize(int32 size);
+
+  // Set the send buffer size (in bytes) for the socket.
+  bool SetSendBufferSize(int32 size);
+
   // Returns true if the socket is already connected or bound.
   bool is_connected() const { return socket_ != kInvalidSocket; }
 
diff --git a/net/udp/udp_socket_win.cc b/net/udp/udp_socket_win.cc
index 49f2f44..d0242d4 100644
--- a/net/udp/udp_socket_win.cc
+++ b/net/udp/udp_socket_win.cc
@@ -239,6 +239,22 @@ int UDPSocketWin::CreateSocket(const IPEndPoint& address) {
   return OK;
 }
 
+bool UDPSocketWin::SetReceiveBufferSize(int32 size) {
+  DCHECK(CalledOnValidThread());
+  int rv = setsockopt(socket_, SOL_SOCKET, SO_RCVBUF,
+                      reinterpret_cast<const char*>(&size), sizeof(size));
+  DCHECK(!rv) << "Could not set socket receive buffer size: " << errno;
+  return rv == 0;
+}
+
+bool UDPSocketWin::SetSendBufferSize(int32 size) {
+  DCHECK(CalledOnValidThread());
+  int rv = setsockopt(socket_, SOL_SOCKET, SO_SNDBUF,
+                      reinterpret_cast<const char*>(&size), sizeof(size));
+  DCHECK(!rv) << "Could not set socket send buffer size: " << errno;
+  return rv == 0;
+}
+
 void UDPSocketWin::DoReadCallback(int rv) {
   DCHECK_NE(rv, ERR_IO_PENDING);
   DCHECK(read_callback_);
diff --git a/net/udp/udp_socket_win.h b/net/udp/udp_socket_win.h
index a3ed37e..ca4ecb1 100644
--- a/net/udp/udp_socket_win.h
+++ b/net/udp/udp_socket_win.h
@@ -96,6 +96,12 @@ class UDPSocketWin : public base::NonThreadSafe {
              const IPEndPoint& address,
              OldCompletionCallback* callback);
 
+  // Set the receive buffer size (in bytes) for the socket.
+  bool SetReceiveBufferSize(int32 size);
+
+  // Set the send buffer size (in bytes) for the socket.
+  bool SetSendBufferSize(int32 size);
+
   // Returns true if the socket is already connected or bound.
   bool is_connected() const { return socket_ != INVALID_SOCKET; }