| /** @file |
| |
| A brief file description |
| |
| @section license License |
| |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you 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. |
| */ |
| |
| /**************************************************************************** |
| |
| UnixUDPConnection.cc |
| Unix UDPConnection implementation |
| |
| |
| ****************************************************************************/ |
| |
| #include "P_Net.h" |
| #include "P_UDPNet.h" |
| |
| UnixUDPConnection::~UnixUDPConnection() |
| { |
| UDPPacketInternal *p = nullptr; |
| |
| SList(UDPPacketInternal, alink) aq(inQueue.popall()); |
| |
| if (!tobedestroyed) { |
| tobedestroyed = 1; |
| } |
| |
| while ((p = aq.pop())) { |
| p->free(); |
| } |
| if (callbackAction) { |
| callbackAction->cancel(); |
| callbackAction = nullptr; |
| } |
| Debug("udpnet", "Destroying udp port = %d", getPortNum()); |
| if (fd != NO_FD) { |
| SocketManager::close(fd); |
| } |
| fd = NO_FD; |
| } |
| |
| // called with continuation lock taken out |
| // We call Release because AddRef was called before entering here. |
| int |
| UnixUDPConnection::callbackHandler(int event, void *data) |
| { |
| (void)event; |
| (void)data; |
| callbackAction = nullptr; |
| if (continuation == nullptr) { |
| return EVENT_CONT; |
| } |
| |
| if (m_errno) { |
| if (!shouldDestroy()) { |
| continuation->handleEvent(NET_EVENT_DATAGRAM_ERROR, this); |
| } |
| destroy(); // don't destroy until after calling back with error |
| Release(); |
| return EVENT_CONT; |
| } else { |
| UDPPacketInternal *p = nullptr; |
| SList(UDPPacketInternal, alink) aq(inQueue.popall()); |
| |
| Debug("udpnet", "UDPConnection::callbackHandler"); |
| Queue<UDPPacketInternal> result; |
| while ((p = aq.pop())) { |
| result.push(p); |
| } |
| |
| if (!shouldDestroy()) { |
| continuation->handleEvent(NET_EVENT_DATAGRAM_READ_READY, &result); |
| } else { |
| while ((p = result.dequeue())) { |
| p->free(); |
| } |
| } |
| } |
| Release(); |
| return EVENT_CONT; |
| } |
| |
| void |
| UDPConnection::bindToThread(Continuation *c) |
| { |
| UnixUDPConnection *uc = (UnixUDPConnection *)this; |
| // add to new connections queue for EThread. |
| EThread *t = eventProcessor.assign_thread(ET_UDP); |
| ink_assert(t); |
| ink_assert(get_UDPNetHandler(t)); |
| uc->ethread = t; |
| AddRef(); |
| uc->continuation = c; |
| mutex = c->mutex; |
| get_UDPNetHandler(t)->newconn_list.push(uc); |
| } |
| |
| Action * |
| UDPConnection::send(Continuation *c, UDPPacket *xp) |
| { |
| UDPPacketInternal *p = (UDPPacketInternal *)xp; |
| UnixUDPConnection *conn = (UnixUDPConnection *)this; |
| |
| if (shouldDestroy()) { |
| ink_assert(!"freeing packet sent on dead connection"); |
| p->free(); |
| return nullptr; |
| } |
| |
| ink_assert(mutex == c->mutex); |
| p->setContinuation(c); |
| p->setConnection(this); |
| conn->continuation = c; |
| ink_assert(conn->continuation != nullptr); |
| mutex = c->mutex; |
| p->reqGenerationNum = conn->sendGenerationNum; |
| get_UDPNetHandler(conn->ethread)->udpOutQueue.send(p); |
| return nullptr; |
| } |
| |
| void |
| UDPConnection::Release() |
| { |
| UnixUDPConnection *p = (UnixUDPConnection *)this; |
| |
| if (ink_atomic_increment(&p->refcount, -1) == 1) { |
| p->ep.stop(); |
| |
| ink_assert(p->callback_link.next == nullptr); |
| ink_assert(p->callback_link.prev == nullptr); |
| ink_assert(p->link.next == nullptr); |
| ink_assert(p->link.prev == nullptr); |
| ink_assert(p->newconn_alink.next == nullptr); |
| |
| delete this; |
| } |
| } |