void RUDPSocket::process_fin(BinStream& strm, const Inet_Addr& remote_addr)
{
RUDP_INFO("recv fin from " << remote_addr << ", rudp id = " << rudp_id_);
RUDP_INFO("send fin2, rudp socket id = " << rudp_id_);
send_fin2();
if(state_ == RUDP_CONNECTING || state_ == RUDP_CONNECTED)
{
RUDP_INFO("state = RUDP_FIN2_STATE, rudp id = " << rudp_id_);
set_state(RUDP_FIN2_STATE);
if(event_handler_ != NULL)
event_handler_->rudp_close_event(rudp_id_);
else
{
RUDP_INFO("state = RUDP_CLOSE, rudp id = " << rudp_id_);
set_state(RUDP_CLOSE);
}
}
else
{
RUDP_INFO("state = RUDP_CLOSE, rudp id = " << rudp_id_);
set_state(RUDP_CLOSE);
}
}
int32_t RUDPObject::create_socket()
{
int32_t ret = INVALID_RUDP_HANDLE;
//句柄不够
if(free_socket_ids_.empty())
alloc_sockets();
RUDPHandleSet::iterator it = free_socket_ids_.begin();
ret = *it;
if(ret < socket_array_.size() && socket_array_[ret] == NULL)
{
RUDPSocket* rudp_session = socket_pool_.pop_obj();
socket_array_[ret] = rudp_session;
free_socket_ids_.erase(it);
used_socket_ids_.insert(ret);
//关联RUDP SOCKET句柄
rudp_session->open(ret);
RUDP_INFO("create rudp socket, socket id = " << ret);
}
else
{
ret = INVALID_RUDP_HANDLE;
RUDP_INFO("create rdup failed");
}
return ret;
}
void RUDPSocket::process_syn_ack(BinStream& strm, const Inet_Addr& remote_addr)
{
RUDP_INFO("recv syn ack from " << remote_addr << ", rudp id = " << rudp_id_);
RUDP()->delete_peer_index(remote_rudp_id_, remote_addr_);
RUDP_INFO("recv syn ack from " << remote_addr);
if(state_ != RUDP_CONNECTED)
{
RUDP_FATAL("state != RUDP_CONNECTED");
return ;
}
PARSE_RUDP_MESSAGE(strm, RUDPSyn2AckPacket, ack, "parse syn_ack failed!");
//计算RTT
uint64_t now_ts = CBaseTimeValue::get_time_value().msec();
uint32_t rtt = static_cast<uint32_t>(now_ts > ack.remote_ts_ ? (now_ts - ack.remote_ts_) : 5);
ccc_.set_rtt(rtt);
RUDP_INFO("rtt = " << rtt << ", rudp socket id = " << rudp_id_);
//触发一个写事件
if(event_handler_ != NULL)
event_handler_->rudp_output_event(rudp_id_);
}
int32_t RUDPSocket::handle_timeout(const void *act, uint32_t timer_id)
{
if(timer_id_ != timer_id)
return 0;
timer_id_= 0;
//解决状态定时的问题，尤其是报文发送
switch(state_)
{
case RUDP_CONNECTING:
if(send_count_ < SYN_MAX_COUNT)
{
send_syn();
set_timer(CONNECT_DELAY);
RUDP_DEBUG("resend syn, rudp socket id = " << rudp_id_);
send_count_ ++;
}
else //连接超时
{
RUDP_INFO("connecting timeout! state = RUDP_FIN2_STATE, rudp id = " << rudp_id_);
set_state(RUDP_FIN2_STATE);
if(event_handler_ != NULL)
event_handler_->rudp_exception_event(rudp_id_);
else
{
RUDP_INFO("state = RUDP_CLOSE, rudp id = " << rudp_id_);
set_state(RUDP_CLOSE);
}
}
break;
case RUDP_FIN_STATE:
if(send_count_ < FIN_MAX_COUNT)
{
RUDP_DEBUG("resend fin, rudp socket id = " << rudp_id_);
send_fin();
set_timer(ccc_.get_rtt() + TIMER_MIN_DELAY);
send_count_ ++;
}
else
{
RUDP_INFO("fin timeout, state = RUDP_CLOSE, rudp id = " << rudp_id_);
set_state(RUDP_CLOSE);
}
break;
}
return 0;
}
void RUDPSocket::process_fin2(BinStream& strm, const Inet_Addr& remote_addr)
{
RUDP_INFO("recv fin2 from " << remote_addr << ", rudp id = " << rudp_id_);
if(event_handler_ != NULL)
{
event_handler_->rudp_close_event(rudp_id_);
}
else
{
RUDP_INFO("state = RUDP_CLOSE, rudp id = " << rudp_id_);
set_state(RUDP_CLOSE);
}
}
int32_t RUDPSocket::setoption(int32_t op_type, int32_t op_value)
{
if(rudp_id_ == -1 || state_ > RUDP_FIN_STATE)
{
RUDP_FATAL("setoption failed!");
return -1;
}
int32_t ret = 0;
switch(op_type)
{
case RUDP_KEEPLIVE:
RUDP_INFO("keep live intnal = " << op_value << "ms, rudp socket id = " << rudp_id_);
keeplive_intnal_ = op_value > DEFAULT_KEEPLIVE ? op_value : DEFAULT_KEEPLIVE;
break;
case RUDP_NAGLE:
if(op_value == 0)
{
send_buffer_.set_nagle(false);
RUDP_INFO("cancel nagle, rudp socket id = " << rudp_id_);
}
else
{
send_buffer_.set_nagle(true);
RUDP_INFO("set nagle, rudp socket id = " << rudp_id_);
}
break;
case RUDP_RECV_BUFF_SIZE:
break;
case RUDP_SEND_BUFF_SIZE:
send_buffer_.set_buffer_size(op_value > MIN_SEND_BUFFER_SIZE ? op_value : MIN_SEND_BUFFER_SIZE);
RUDP_INFO("set send buffer, buffer size = " << op_value);
break;
case RUDP_TIMEOUT_COUNT:
timeout_count_ = op_value > 2 ? op_value : 2;
RUDP_INFO("set rudp timeout delay = " << timeout_count_ * 6 << "s");
break;
default:
ret = -1;
}
return ret;
}
void RUDPCCCObject::on_ack(uint64_t ack_seq)
{
if(ack_seq <= last_ack_id_)
{
return;
}
uint32_t space = (uint32_t)(ack_seq - last_ack_id_);
if(slow_start_) //慢启动窗口决策
{
snd_cwnd_ += space;
if(snd_cwnd_ >= max_cwnd_)
{
slow_start_ = false;
RUDP_INFO("ccc stop slow_start, snd_cwnd = " << snd_cwnd_);
snd_cwnd_ = max_cwnd_;
}
RUDP_DEBUG("send window size = " << snd_cwnd_);
}
else //平衡状态
{
if (recv_count_ / 2 < resend_count_) //出现丢包，不做加速
loss_flag_ = false;
else if(resend_count_ == 0) //加速，快速恢复
{
snd_cwnd_ = (uint32_t)(snd_cwnd_ + (snd_cwnd_ >> 3));
snd_cwnd_ = core_min(max_cwnd_, snd_cwnd_);
loss_flag_ = false;
}
}
void RUDPObject::attach(IRUDPAdapter* adapter)
{
if(adapter == NULL)
{
RUDP_WARNING("adapter is NULL");
return ;
}
for(uint8_t i = 0; i < adapter_array_.size(); i ++) //关联本地的网络适配器
{
if(adapter_array_[i] == adapter || i >= INVALID_ADAPTER_INDEX) //重复ATTACH
{
RUDP_WARNING("repeat attach adapter!!");
break;
}
//绑定
if(adapter_array_[i] == NULL)
{
adapter->set_index(i);
adapter_array_[i] = adapter;
RUDP_INFO("attach adapter, id = " << (uint16_t)i << ", local_addr = " << adapter->get_local_addr());
break;
}
}
}
//正常关闭RUDP SOCKET
void RUDPSocket::close()
{
switch(state_)
{
case RUDP_CONNECTING:
case RUDP_CONNECTED:
if(event_handler_ != NULL)
{
event_handler_->rudp_close_event(rudp_id_);
}
//发送SYN
RUDP_INFO("close rudp socket, state = RUDP_FIN_STATE, rudp id = " << rudp_id_);
set_state(RUDP_FIN_STATE);
RUDP_DEBUG("send fin, rudp socket id = " << rudp_id_);
send_fin();
set_timer(ccc_.get_rtt() + TIMER_MIN_DELAY);
send_count_ ++;
break;
case RUDP_FIN2_STATE:
set_state(RUDP_CLOSE);
break;
}
}
void RUDPCCCObject::on_loss(uint64_t base_seq, const LossIDArray& loss_ids)
{
if(slow_start_) //取消慢启动
{
slow_start_ = false;
RUDP_INFO("ccc stop slow_start, snd_cwnd = " << snd_cwnd_);
}
}
void RUDPSocket::heartbeat()
{
if(state_ != RUDP_CONNECTED)
return ;
uint64_t now_ts = CBaseTimeValue::get_time_value().msec();
//心跳计数
if(now_ts > heart_ts_ + keeplive_intnal_)
{
keeplive_count_ ++;
if(keeplive_count_ > timeout_count_) //超时
{
RUDP_ERROR("keep live timeout, rudp socket id = " << rudp_id_);
if(event_handler_ != NULL) //通知上层异常
{
RUDP_INFO("state = RUDP_FIN2_STATE");
set_state(RUDP_FIN2_STATE);
event_handler_->rudp_exception_event(rudp_id_);
return ;
}
else
{
RUDP_INFO("state = RUDP_CLOSE");
set_state(RUDP_CLOSE);
return ;
}
}
else//发送KEEPLIVE
{
RUDP_DEBUG("send keeplive, rudp socket id =" << rudp_id_);
send_keeplive(now_ts);
}
}
//模块心跳
ccc_.on_timer(now_ts);
recv_buffer_.on_timer(now_ts, ccc_.get_rtt_var());
send_buffer_.on_timer(now_ts);
}
void RUDPSocket::process_syn(RUDPSynPacket& syn, const Inet_Addr& remote_addr)
{
RUDP_INFO("recv syn from " << remote_addr << ", rudp id = " << rudp_id_);
if(state_ == RUDP_IDLE && rudp_id_ != INVALID_RUDP_HANDLE)
{
uint64_t now_timer = CBaseTimeValue::get_time_value().msec();
//初始化接收SEQ
recv_buffer_.set_first_seq(syn.start_seq_);
recv_buffer_.set_send_last_ack_ts(now_timer);
ccc_.init(send_buffer_.get_buffer_seq() - 1);
//设置连接信息
remote_addr_ = remote_addr;
remote_rudp_id_ = syn.local_rudp_id_;
RUDP_INFO("sart seq = " << syn.start_seq_ << ", remote_rudp_id = " << remote_rudp_id_);
RUDP_DEBUG("send syn2, rudp socket id = " << rudp_id_);
send_syn2(0, syn.local_ts_);
RUDP_INFO("state = RUDP_CONNECTED, rudp id = " << rudp_id_);
set_state(RUDP_CONNECTED);
//发送一个KEEPLIVE
RUDP_DEBUG("send keeplive, rudp socket id =" << rudp_id_);
send_keeplive(now_timer);
}
else if(state_ == RUDP_CONNECTING || state_ == RUDP_CONNECTED)
{
RUDP_INFO("send syn2, rudp socket id = " << rudp_id_);
send_syn2(0, syn.local_ts_);
}
else
{
RUDP_DEBUG("send syn2(ERROR_SYN_STATE), rudp socket id = " << rudp_id_);
send_syn2(ERROR_SYN_STATE, syn.local_ts_);
RUDP_INFO("state = RUDP_CLOSE, rudp id = " << rudp_id_);
set_state(RUDP_CLOSE);
}
}
void RUDPSocket::process_keeplive_ack(BinStream& strm, const Inet_Addr& remote_addr)
{
RUDP_INFO("keeplive ack from " << remote_addr << ", rudp id = " << rudp_id_);
if(state_ != RUDP_CONNECTED)
{
RUDP_WARNING("state != RUDP_CONNECTED");
return ;
}
keeplive_count_ = 0;
PARSE_RUDP_MESSAGE(strm, RDUPKeepLive, ack, "parse keeplive ack failed!");
//计算RTT
uint64_t now_ts = CBaseTimeValue::get_time_value().msec();
uint32_t rtt = static_cast<uint32_t>(now_ts > ack.timestamp_ ? (now_ts - ack.timestamp_) : 5);
ccc_.set_rtt(rtt);
RUDP_INFO("rtt = " << rtt << ", rudp socket id = " << rudp_id_);
}
void RUDPSocket::process_syn2(BinStream& strm, const Inet_Addr& remote_addr)
{
RUDP_INFO("recv syn2 from " << remote_addr << ", rudp id = " << rudp_id_);
PARSE_RUDP_MESSAGE(strm, RUDPSyn2Packet, syn2, "parse syn2 failed!");
if(state_ == RUDP_CONNECTING)
{
if(syn2.syn2_result_ != 0x00) //连接异常
{
RUDP_INFO("syn failed! syn2.syn2_result_ = " << (uint16_t)syn2.syn2_result_);
if(event_handler_ != NULL)
{
RUDP_INFO("state = RUDP_FIN2_STATE, rudp id = " << rudp_id_);
set_state(RUDP_FIN2_STATE);
event_handler_->rudp_exception_event(rudp_id_);
}
else
{
RUDP_INFO("state = RUDP_CLOSE, rudp id = " << rudp_id_);
set_state(RUDP_CLOSE);
}
return ;
}
//设置接收BUFF的初始化
//ccc_.init(syn2.start_seq_ - 1);
recv_buffer_.set_first_seq(syn2.start_seq_);
//设置连接信息
remote_addr_ = remote_addr;
remote_rudp_id_ = syn2.local_rudp_id_;
//计算RTT
uint64_t now_ts = CBaseTimeValue::get_time_value().msec();
uint32_t rtt = static_cast<uint32_t>(now_ts > syn2.remote_ts_ ? (now_ts - syn2.remote_ts_) : 5);
recv_buffer_.set_send_last_ack_ts(now_ts);
ccc_.set_rtt(rtt);
RUDP_INFO("syn succ, sart seq = " << syn2.start_seq_ << ", remote_rudp_id = " << remote_rudp_id_ << ", rtt = " << rtt);
RUDP_INFO("state = RUDP_CONNECTED, rudp id = " << rudp_id_);
set_state(RUDP_CONNECTED);
RUDP_DEBUG("send syn ack, rudp socket id = " << rudp_id_);
send_syn_ack(0, syn2.local_ts_);
//触发一个写事件
if(event_handler_ != NULL)
event_handler_->rudp_output_event(rudp_id_);
heart_ts_ = now_ts;
}
else if(state_ == RUDP_CONNECTED)
{
RUDP_DEBUG("send syn ack, rudp socket id = " << rudp_id_);
send_syn_ack(0, syn2.local_ts_);
}
}
void RUDPSocket::process_keeplive(BinStream& strm, const Inet_Addr& remote_addr)
{
RUDP_INFO("keeplive from " << remote_addr << ", rudp id = " << rudp_id_);
if(state_ != RUDP_CONNECTED)
{
return ;
}
keeplive_count_ = 0;
PARSE_RUDP_MESSAGE(strm, RDUPKeepLive, body, "parse keeplive failed!");
send_keeplive_ack(body.timestamp_);
}
//强制关闭RUDP SOCKET
void RUDPSocket::force_close()
{
switch(state_)
{
case RUDP_CONNECTING:
case RUDP_CONNECTED:
RUDP_DEBUG("send fin, rudp socket id = " << rudp_id_);
for(uint8_t i = 0; i < 6; i ++) //直接发送3个fin
send_fin();
case RUDP_FIN2_STATE:
RUDP_INFO("state = RUDP_CLOSE");
set_state(RUDP_CLOSE);
break;
}
}
void RUDPCCCObject::on_timer(uint64_t now_ts)
{
uint32_t delay = core_max(rtt_ / 8, 50);
if (now_ts >= prev_on_ts_ + delay) //10个RTT决策一次
{
print_count_ ++;
if(print_count_ % 4 == 0)
{
RUDP_DEBUG("send window size = " << snd_cwnd_ << ",rtt = " << rtt_ << ",rtt_var = " << rtt_var_ << ",resend = " << resend_count_);
set_max_cwnd(rtt_);
}
if(slow_start_) //停止慢启动过程
{
if(print_count_ > 10)
{
slow_start_ = false;
RUDP_INFO("ccc stop slow_start, snd_cwnd = " << snd_cwnd_);
}
}
else
{
if (recv_count_ > (snd_cwnd_ * delay * 7 / (rtt_ * 8)))
{
snd_cwnd_ = (uint32_t)(snd_cwnd_ + core_max(8,(snd_cwnd_ / 8)));
snd_cwnd_ = core_min(max_cwnd_, snd_cwnd_);
loss_flag_ = false;
}
else if (recv_count_ < snd_cwnd_ * delay * 5 / (rtt_ * 8)){
snd_cwnd_ = (uint32_t)(snd_cwnd_ - (snd_cwnd_ / 16));
snd_cwnd_ = core_max(min_cwnd_, snd_cwnd_);
loss_flag_ = true;
}
else if (rtt_var_ > 30 && resend_count_ >= core_max(8, snd_cwnd_ * delay * 3 / (8 * rtt_))){
snd_cwnd_ = (uint32_t)(snd_cwnd_ - (snd_cwnd_ / 10));
snd_cwnd_ = core_max(min_cwnd_, snd_cwnd_);
loss_flag_ = true;
}
resend_count_ = 0;
}
recv_count_ = 0;
prev_on_ts_ = now_ts;
}
}
void RUDPObject::free_sockets(int32_t rudp_id)
{
if(rudp_id > 0 && rudp_id < socket_array_.size() && socket_array_[rudp_id] != NULL)
{
RUDPPeerInfo info(socket_array_[rudp_id]->get_remote_rudp_id(), socket_array_[rudp_id]->get_peer_addr());
peer_socket_ids_.erase(info);
socket_pool_.push_obj(socket_array_[rudp_id]);
socket_array_[rudp_id]->reset();
socket_array_[rudp_id] = NULL;
free_socket_ids_.insert(rudp_id);
used_socket_ids_.erase(rudp_id);
}
RUDP_INFO("free rudp socket, socket id = " << rudp_id);
}
void RUDPObject::init()
{
RUDP_INFO("init rudp core!");
listener_ = NULL;
free_socket_ids_.clear();
used_socket_ids_.clear();
peer_socket_ids_.clear();
for(int32_t i = 0; i < MAX_LOCAL_ADDR_SIZE; i ++)
{
adapter_array_.push_back(NULL);
}
alloc_sockets();
set_timer();
}
int32_t RUDPSocket::send(const uint8_t* data, int32_t data_size)
{
if(state_ != RUDP_CONNECTED || data_size <= 0)
{
RUDP_FATAL("send failed! state_ != RUDP_CONNECTED or data size = 0, rudp id = " << rudp_id_);
error_code_ = RUDP_SEND_ERROR;
return -1;
}
int32_t ret = send_buffer_.send(data, data_size);
if(ret <= 0)
{
RUDP_INFO("send buffer is full, rudp socket id = " << rudp_id_);
error_code_ = RUDP_SEND_EAGIN;
}
return ret;
}
void RUDPObject::destroy()
{
cancel_timer();
int32_t size = socket_array_.size();
for(int32_t i = 0; i < size; ++i)
{
if(socket_array_[i] != NULL)
{
socket_array_[i]->force_close();
}
}
free_socket_ids_.clear();
used_socket_ids_.clear();
peer_socket_ids_.clear();
RUDP_INFO("destroy rudp core!");
}
int32_t RUDPSocket::connect(const Inet_Addr& remote_addr)
{
if(rudp_id_ == INVALID_RUDP_HANDLE || state_ != RUDP_IDLE
|| local_index_ == 255 || remote_rudp_id_ != INVALID_RUDP_HANDLE)
{
RUDP_FATAL("rudp connect failed! rudp socket id = " << rudp_id_);
error_code_ = RUDP_CONNECT_FAIL;
return -1;
}
remote_addr_ = remote_addr;
check_sum_ = rand() % 65536; //产生一个会话的CHECK SUM
RUDP_INFO("state = RUDP_CONNECTING, rudp id = " << rudp_id_ << ", remote addr = " << remote_addr_);
set_state(RUDP_CONNECTING);
RUDP_DEBUG("send syn, rudp socket id = " << rudp_id_);
send_syn();
ccc_.init(send_buffer_.get_buffer_seq() - 1);
set_timer(CONNECT_DELAY);
send_count_ ++;
return 0;
}
void RUDPObject::process(IRUDPAdapter* adapter, BinStream& strm, const Inet_Addr& remote_addr)
{
uint8_t index = INVALID_ADAPTER_INDEX;
if(adapter != NULL)
index = adapter->get_index();
if(adapter_array_[index] == NULL)
{
RUDP_FATAL("adapter is not attach!!!");
return ;
}
PARSE_RUDP_HEAD(rudp_head, "parse rudp head failed!!");
RUDPSocket *rudp_session = get_socket(rudp_head.remote_rudp_id_);
if(rudp_session != NULL)
{
rudp_session->process(rudp_head.msg_id_, rudp_head.check_sum_, strm, remote_addr);
return ;
}
//处理SYN连接请求
if(rudp_head.msg_id_ == RUDP_SYN && rudp_head.remote_rudp_id_ == INVALID_RUDP_HANDLE)
{
PARSE_RUDP_MESSAGE(strm, RUDPSynPacket, syn, "parse syn failed!");
//在半开连接中找
rudp_session = find_by_peer_id(syn.local_rudp_id_, remote_addr);
if(rudp_session == NULL)
{
int32_t new_rudp_id = create_socket();
if(new_rudp_id == INVALID_RUDP_HANDLE)
{
send_syn2(rudp_head.remote_rudp_id_, SYSTEM_SYN_ERROR, rudp_head.check_sum_, remote_addr, adapter);
RUDP_INFO("send syn2 to " << remote_addr);
return ;
}
if(this->bind(new_rudp_id, adapter->get_local_addr()) != 0)
{
free_sockets(new_rudp_id);
send_syn2(rudp_head.remote_rudp_id_, SYSTEM_SYN_ERROR, rudp_head.check_sum_, remote_addr, adapter);
RUDP_INFO("send syn2 to " << remote_addr);
return ;
}
//建立远程SOCKET ID与本地SOCKET ID的关系，防止重复建立连接
RUDPPeerInfo info(syn.local_rudp_id_, remote_addr);
peer_socket_ids_[info] = new_rudp_id;
rudp_session = get_socket(new_rudp_id);
rudp_session->set_check_sum(rudp_head.check_sum_);
//提示上层EVENT HANDLE进行ACCEPT，可以在上层进行SOCKET属性设置
if(listener_ != NULL)
listener_->rudp_accept_event(new_rudp_id);
}
//进行消息处理
rudp_session->process_syn(syn, remote_addr);
}
else
{
RUDP_WARNING("error msg, msg id = " << (uint16_t)rudp_head.msg_id_ << ", rudp id = " << rudp_head.remote_rudp_id_ << ", remote addr = "<< remote_addr);
}
}