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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __ADB_SOCKET_H
#define __ADB_SOCKET_H
#include <stddef.h>
#include "fdevent.h"
struct apacket;
class atransport;
/* An asocket represents one half of a connection between a local and
** remote entity. A local asocket is bound to a file descriptor. A
** remote asocket is bound to the protocol engine.
*/
struct asocket {
/* chain pointers for the local/remote list of
** asockets that this asocket lives in
*/
asocket *next;
asocket *prev;
/* the unique identifier for this asocket
*/
unsigned id;
/* flag: set when the socket's peer has closed
** but packets are still queued for delivery
*/
int closing;
// flag: set when the socket failed to write, so the socket will not wait to
// write packets and close directly.
bool has_write_error;
/* flag: quit adbd when both ends close the
** local service socket
*/
int exit_on_close;
/* the asocket we are connected to
*/
asocket *peer;
/* For local asockets, the fde is used to bind
** us to our fd event system. For remote asockets
** these fields are not used.
*/
fdevent fde;
int fd;
/* queue of apackets waiting to be written
*/
apacket *pkt_first;
apacket *pkt_last;
/* enqueue is called by our peer when it has data
** for us. It should return 0 if we can accept more
** data or 1 if not. If we return 1, we must call
** peer->ready() when we once again are ready to
** receive data.
*/
int (*enqueue)(asocket *s, apacket *pkt);
/* ready is called by the peer when it is ready for
** us to send data via enqueue again
*/
void (*ready)(asocket *s);
/* shutdown is called by the peer before it goes away.
** the socket should not do any further calls on its peer.
** Always followed by a call to close. Optional, i.e. can be NULL.
*/
void (*shutdown)(asocket *s);
/* close is called by the peer when it has gone away.
** we are not allowed to make any further calls on the
** peer once our close method is called.
*/
void (*close)(asocket *s);
/* A socket is bound to atransport */
atransport *transport;
size_t get_max_payload() const;
};
asocket *find_local_socket(unsigned local_id, unsigned remote_id);
void install_local_socket(asocket *s);
void remove_socket(asocket *s);
void close_all_sockets(atransport *t);
asocket *create_local_socket(int fd);
asocket *create_local_service_socket(const char* destination,
const atransport* transport);
asocket *create_remote_socket(unsigned id, atransport *t);
void connect_to_remote(asocket *s, const char *destination);
void connect_to_smartsocket(asocket *s);
#endif // __ADB_SOCKET_H
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