Add unit tests for local socket.
Add has_write_error flag in asocket, so it will not wait on local_socket_closing_list
to write pending packets in local_socket_close(). Although it doesn't fix any problem,
it helps to make the code more stable.
Add a missing put_apacket() in error handling.
Add a check when adding local socket in local_socket_closing_list.
Bug: 23314034
Change-Id: I75b07ba8ee59b7f277fba2fb919db63065b291be
diff --git a/adb/socket.h b/adb/socket.h
new file mode 100644
index 0000000..4083036
--- /dev/null
+++ b/adb/socket.h
@@ -0,0 +1,117 @@
+/*
+ * 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