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// Copyright (c) 2011 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 "ppapi/shared_impl/private/udp_socket_private_impl.h"
#include <string.h>
#include <algorithm>
#include "base/basictypes.h"
#include "base/bind.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "ppapi/c/pp_completion_callback.h"
#include "ppapi/c/pp_errors.h"
namespace ppapi {
namespace {
void AbortCallback(PP_CompletionCallback callback) {
PP_RunCompletionCallback(&callback, PP_ERROR_ABORTED);
}
} // namespace
const int32_t UDPSocketPrivateImpl::kMaxReadSize = 1024 * 1024;
const int32_t UDPSocketPrivateImpl::kMaxWriteSize = 1024 * 1024;
UDPSocketPrivateImpl::UDPSocketPrivateImpl(const HostResource& resource,
uint32 socket_id)
: Resource(resource) {
Init(socket_id);
}
UDPSocketPrivateImpl::UDPSocketPrivateImpl(PP_Instance instance,
uint32 socket_id)
: Resource(instance) {
Init(socket_id);
}
UDPSocketPrivateImpl::~UDPSocketPrivateImpl() {
}
thunk::PPB_UDPSocket_Private_API*
UDPSocketPrivateImpl::AsPPB_UDPSocket_Private_API() {
return this;
}
int32_t UDPSocketPrivateImpl::Bind(const PP_NetAddress_Private* addr,
PP_CompletionCallback callback) {
if (!addr || !callback.func)
return PP_ERROR_BADARGUMENT;
if (bound_ || closed_)
return PP_ERROR_FAILED;
if (bind_callback_.func)
return PP_ERROR_INPROGRESS;
// TODO(dmichael): use some other strategy for determining if an
// operation is in progress
bind_callback_ = callback;
// Send the request, the browser will call us back via BindACK.
SendBind(*addr);
return PP_OK_COMPLETIONPENDING;
}
int32_t UDPSocketPrivateImpl::RecvFrom(char* buffer,
int32_t num_bytes,
PP_CompletionCallback callback) {
if (!buffer || num_bytes <= 0 || !callback.func)
return PP_ERROR_BADARGUMENT;
if (!bound_)
return PP_ERROR_FAILED;
if (recvfrom_callback_.func)
return PP_ERROR_INPROGRESS;
read_buffer_ = buffer;
bytes_to_read_ = std::min(num_bytes, kMaxReadSize);
recvfrom_callback_ = callback;
// Send the request, the browser will call us back via RecvFromACK.
SendRecvFrom(bytes_to_read_);
return PP_OK_COMPLETIONPENDING;
}
PP_Bool UDPSocketPrivateImpl::GetRecvFromAddress(PP_NetAddress_Private* addr) {
if (!addr)
return PP_FALSE;
*addr = recvfrom_addr_;
return PP_TRUE;
}
int32_t UDPSocketPrivateImpl::SendTo(const char* buffer,
int32_t num_bytes,
const PP_NetAddress_Private* addr,
PP_CompletionCallback callback) {
if (!buffer || num_bytes <= 0 || !addr || !callback.func)
return PP_ERROR_BADARGUMENT;
if (!bound_)
return PP_ERROR_FAILED;
if (sendto_callback_.func)
return PP_ERROR_INPROGRESS;
if (num_bytes > kMaxWriteSize)
num_bytes = kMaxWriteSize;
sendto_callback_ = callback;
// Send the request, the browser will call us back via SendToACK.
SendSendTo(std::string(buffer, num_bytes), *addr);
return PP_OK_COMPLETIONPENDING;
}
void UDPSocketPrivateImpl::Close() {
if(closed_)
return;
bound_ = false;
closed_ = true;
SendClose();
socket_id_ = 0;
PostAbortAndClearIfNecessary(&bind_callback_);
PostAbortAndClearIfNecessary(&recvfrom_callback_);
PostAbortAndClearIfNecessary(&sendto_callback_);
}
void UDPSocketPrivateImpl::OnBindCompleted(bool succeeded) {
if (!bind_callback_.func) {
NOTREACHED();
return;
}
if (succeeded)
bound_ = true;
PP_RunAndClearCompletionCallback(&bind_callback_,
succeeded ? PP_OK : PP_ERROR_FAILED);
}
void UDPSocketPrivateImpl::OnRecvFromCompleted(
bool succeeded,
const std::string& data,
const PP_NetAddress_Private& addr) {
if (!recvfrom_callback_.func || !read_buffer_) {
NOTREACHED();
return;
}
if (succeeded) {
CHECK_LE(static_cast<int32_t>(data.size()), bytes_to_read_);
if (!data.empty())
memcpy(read_buffer_, data.c_str(), data.size());
}
read_buffer_ = NULL;
bytes_to_read_ = -1;
recvfrom_addr_ = addr;
PP_RunAndClearCompletionCallback(
&recvfrom_callback_,
succeeded ? static_cast<int32_t>(data.size()) :
static_cast<int32_t>(PP_ERROR_FAILED));
}
void UDPSocketPrivateImpl::OnSendToCompleted(bool succeeded,
int32_t bytes_written) {
if (!sendto_callback_.func) {
NOTREACHED();
return;
}
PP_RunAndClearCompletionCallback(
&sendto_callback_,
succeeded ? bytes_written : static_cast<int32_t>(PP_ERROR_FAILED));
}
void UDPSocketPrivateImpl::Init(uint32 socket_id) {
DCHECK(socket_id != 0);
socket_id_ = socket_id;
bound_ = false;
closed_ = false;
bind_callback_ = PP_BlockUntilComplete();
recvfrom_callback_ = PP_BlockUntilComplete();
sendto_callback_ = PP_BlockUntilComplete();
read_buffer_ = NULL;
bytes_to_read_ = -1;
recvfrom_addr_.size = 0;
memset(recvfrom_addr_.data, 0,
arraysize(recvfrom_addr_.data) * sizeof(*recvfrom_addr_.data));
}
void UDPSocketPrivateImpl::PostAbortAndClearIfNecessary(
PP_CompletionCallback* callback) {
DCHECK(callback);
if (callback->func) {
MessageLoop::current()->PostTask(FROM_HERE,
base::Bind(&AbortCallback, *callback));
*callback = PP_BlockUntilComplete();
}
}
} // namespace ppapi
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