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// Copyright 2014 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.
#include "components/devtools_bridge/socket_tunnel_packet_handler.h"
#include <stdlib.h>
#include "components/devtools_bridge/socket_tunnel_connection.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
namespace devtools_bridge {
static const int kControlConnectionId =
SocketTunnelConnection::kControlConnectionId;
static const int kMinConnectionId = SocketTunnelConnection::kMinConnectionId;
static const int kMaxConnectionId = SocketTunnelConnection::kMaxConnectionId;
static const int kControlPacketSizeBytes =
SocketTunnelConnection::kControlPacketSizeBytes;
void SocketTunnelPacketHandler::DecodePacket(const void* data, size_t length) {
const unsigned char* bytes = static_cast<const unsigned char*>(data);
if (length == 0) {
DLOG(ERROR) << "Empty packet";
HandleProtocolError();
return;
}
int connection_id = bytes[0];
if (connection_id != kControlConnectionId) {
if (connection_id < kMinConnectionId ||
connection_id > kMaxConnectionId) {
DLOG(ERROR) << "Invalid connection ID: " << connection_id;
HandleProtocolError();
return;
}
int connection_index = connection_id - kMinConnectionId;
scoped_refptr<net::IOBufferWithSize> packet(
new net::IOBufferWithSize(length - 1));
memcpy(packet->data(), bytes + 1, length - 1);
HandleDataPacket(connection_index, packet);
} else if (length >= kControlPacketSizeBytes) {
static_assert(kControlPacketSizeBytes == 3,
"kControlPacketSizeBytes should equal 3");
int op_code = bytes[1];
connection_id = bytes[2];
if (connection_id < kMinConnectionId ||
connection_id > kMaxConnectionId) {
DLOG(ERROR) << "Invalid connection ID: " << connection_id;
HandleProtocolError();
return;
}
int connection_index = connection_id - kMinConnectionId;
HandleControlPacket(connection_index, op_code);
} else {
DLOG(ERROR) << "Invalid packet";
HandleProtocolError();
return;
}
}
} // namespace devtools_bridge
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