// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_UDP_DATAGRAM_SERVER_SOCKET_H_
#define NET_UDP_DATAGRAM_SERVER_SOCKET_H_
#include "net/base/completion_callback.h"
#include "net/base/net_util.h"
#include "net/udp/datagram_socket.h"
namespace net {
class IPEndPoint;
class IOBuffer;
// A UDP Socket.
class NET_EXPORT DatagramServerSocket : public DatagramSocket {
public:
virtual ~DatagramServerSocket() {}
// Initialize this socket as a server socket listening at |address|.
// Returns a network error code.
virtual int Listen(const IPEndPoint& address) = 0;
// Read from a socket and receive sender address information.
// |buf| is the buffer to read data into.
// |buf_len| is the maximum amount of data to read.
// |address| is a buffer provided by the caller for receiving the sender
// address information about the received data. This buffer must be kept
// alive by the caller until the callback is placed.
// |address_length| is a ptr to the length of the |address| buffer. This
// is an input parameter containing the maximum size |address| can hold
// and also an output parameter for the size of |address| upon completion.
// |callback| the callback on completion of the Recv.
// Returns a net error code, or ERR_IO_PENDING if the IO is in progress.
// If ERR_IO_PENDING is returned, the caller must keep |buf|, |address|,
// and |address_length| alive until the callback is called.
virtual int RecvFrom(IOBuffer* buf,
int buf_len,
IPEndPoint* address,
const CompletionCallback& callback) = 0;
// Send to a socket with a particular destination.
// |buf| is the buffer to send
// |buf_len| is the number of bytes to send
// |address| is the recipient address.
// |address_length| is the size of the recipient address
// |callback| is the user callback function to call on complete.
// Returns a net error code, or ERR_IO_PENDING if the IO is in progress.
// If ERR_IO_PENDING is returned, the caller must keep |buf| and |address|
// alive until the callback is called.
virtual int SendTo(IOBuffer* buf,
int buf_len,
const IPEndPoint& address,
const CompletionCallback& callback) = 0;
// Set the receive buffer size (in bytes) for the socket.
// Returns a net error code.
virtual int SetReceiveBufferSize(int32 size) = 0;
// Set the send buffer size (in bytes) for the socket.
// Returns a net error code.
virtual int SetSendBufferSize(int32 size) = 0;
// Allow the socket to share the local address to which the socket will
// be bound with other processes. Should be called before Listen().
virtual void AllowAddressReuse() = 0;
// Allow sending and receiving packets to and from broadcast addresses.
// Should be called before Listen().
virtual void AllowBroadcast() = 0;
// Join the multicast group with address |group_address|.
// Returns a network error code.
virtual int JoinGroup(const IPAddressNumber& group_address) const = 0;
// Leave the multicast group with address |group_address|.
// If the socket hasn't joined the group, it will be ignored.
// It's optional to leave the multicast group before destroying
// the socket. It will be done by the OS.
// Returns a network error code.
virtual int LeaveGroup(const IPAddressNumber& group_address) const = 0;
// Set interface to use for multicast. If |interface_index| set to 0, default
// interface is used.
// Should be called before Bind().
// Returns a network error code.
virtual int SetMulticastInterface(uint32 interface_index) = 0;
// Set the time-to-live option for UDP packets sent to the multicast
// group address. The default value of this option is 1.
// Cannot be negative or more than 255.
// Should be called before Bind().
// Returns a network error code.
virtual int SetMulticastTimeToLive(int time_to_live) = 0;
// Set the loopback flag for UDP socket. If this flag is true, the host
// will receive packets sent to the joined group from itself.
// The default value of this option is true.
// Should be called before Bind().
// Returns a network error code.
virtual int SetMulticastLoopbackMode(bool loopback) = 0;
// Set the Differentiated Services Code Point. May do nothing on
// some platforms. Returns a network error code.
virtual int SetDiffServCodePoint(DiffServCodePoint dscp) = 0;
// Resets the thread to be used for thread-safety checks.
virtual void DetachFromThread() = 0;
};
} // namespace net
#endif // NET_UDP_DATAGRAM_SERVER_SOCKET_H_