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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_SOCKET_DATAGRAM_SOCKET_H_
#define NET_SOCKET_DATAGRAM_SOCKET_H_
#include "net/base/net_export.h"
#include "net/socket/diff_serv_code_point.h"
namespace net {
class IPEndPoint;
class NetLogWithSource;
// A datagram socket is an interface to a protocol which exchanges
// datagrams, like UDP.
class NET_EXPORT_PRIVATE DatagramSocket {
public:
// Type of source port binding to use.
enum BindType {
RANDOM_BIND,
DEFAULT_BIND,
};
virtual ~DatagramSocket() = default;
// Close the socket.
virtual void Close() = 0;
// Copy the remote udp address into |address| and return a network error code.
virtual int GetPeerAddress(IPEndPoint* address) const = 0;
// Copy the local udp address into |address| and return a network error code.
// (similar to getsockname)
virtual int GetLocalAddress(IPEndPoint* address) const = 0;
// Switch to use non-blocking IO. Must be called right after construction and
// before other calls.
virtual void UseNonBlockingIO() = 0;
// Requests that packets sent by this socket not be fragment, either locally
// by the host, or by routers (via the DF bit in the IPv4 packet header).
// May not be supported by all platforms. Returns a network error code if
// there was a problem, but the socket will still be usable. Can not
// return ERR_IO_PENDING.
virtual int SetDoNotFragment() = 0;
// Requests that packets received by this socket have the ECN bit set. Returns
// a network error code if there was a problem.
virtual int SetRecvTos() = 0;
// Sets both parts of the TOS byte in the IP header. DSCP_NO_CHANGE or
// ECN_NO_CHANGE can allow the socket to preserver part of the existing
// setting.
virtual int SetTos(DiffServCodePoint dscp, EcnCodePoint ecn) = 0;
// If |confirm| is true, then the MSG_CONFIRM flag will be passed to
// subsequent writes if it's supported by the platform.
virtual void SetMsgConfirm(bool confirm) = 0;
// Gets the NetLog for this socket.
virtual const NetLogWithSource& NetLog() const = 0;
// Returns the TOS byte of the last received datagram, or 0 for sockets which
// do not have the capability.
virtual DscpAndEcn GetLastTos() const = 0;
};
} // namespace net
#endif // NET_SOCKET_DATAGRAM_SOCKET_H_
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