| /** @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. |
| */ |
| |
| /**************************************************************************** |
| |
| P_UDPPacket.h |
| Implementation of UDPPacket |
| |
| ****************************************************************************/ |
| |
| #pragma once |
| |
| #include "I_UDPNet.h" |
| |
| class UDPPacketInternal : public UDPPacket |
| { |
| public: |
| UDPPacketInternal(); |
| ~UDPPacketInternal() override; |
| |
| void free() override; |
| |
| SLINK(UDPPacketInternal, alink); // atomic link |
| // packet scheduling stuff: keep it a doubly linked list |
| uint64_t pktLength = 0; |
| |
| int reqGenerationNum = 0; |
| ink_hrtime delivery_time = 0; // when to deliver packet |
| |
| Ptr<IOBufferBlock> chain; |
| Continuation *cont = nullptr; // callback on error |
| UDPConnectionInternal *conn = nullptr; // connection where packet should be sent to. |
| |
| int in_the_priority_queue = 0; |
| int in_heap = 0; |
| }; |
| |
| extern ClassAllocator<UDPPacketInternal> udpPacketAllocator; |
| |
| TS_INLINE |
| UDPPacketInternal::UDPPacketInternal() |
| |
| { |
| memset(&from, '\0', sizeof(from)); |
| memset(&to, '\0', sizeof(to)); |
| } |
| |
| TS_INLINE |
| UDPPacketInternal::~UDPPacketInternal() |
| { |
| chain = nullptr; |
| } |
| |
| TS_INLINE void |
| UDPPacketInternal::free() |
| { |
| chain = nullptr; |
| if (conn) |
| conn->Release(); |
| conn = nullptr; |
| udpPacketAllocator.free(this); |
| } |
| |
| TS_INLINE void |
| UDPPacket::append_block(IOBufferBlock *block) |
| { |
| UDPPacketInternal *p = static_cast<UDPPacketInternal *>(this); |
| |
| if (block) { |
| if (p->chain) { // append to end |
| IOBufferBlock *last = p->chain.get(); |
| while (last->next) { |
| last = last->next.get(); |
| } |
| last->next = block; |
| } else { |
| p->chain = block; |
| } |
| } |
| } |
| |
| TS_INLINE int64_t |
| UDPPacket::getPktLength() const |
| { |
| UDPPacketInternal *p = const_cast<UDPPacketInternal *>(static_cast<const UDPPacketInternal *>(this)); |
| IOBufferBlock *b; |
| |
| p->pktLength = 0; |
| b = p->chain.get(); |
| while (b) { |
| p->pktLength += b->read_avail(); |
| b = b->next.get(); |
| } |
| return p->pktLength; |
| } |
| |
| TS_INLINE void |
| UDPPacket::free() |
| { |
| static_cast<UDPPacketInternal *>(this)->free(); |
| } |
| |
| TS_INLINE void |
| UDPPacket::setContinuation(Continuation *c) |
| { |
| static_cast<UDPPacketInternal *>(this)->cont = c; |
| } |
| |
| TS_INLINE void |
| UDPPacket::setConnection(UDPConnection *c) |
| { |
| /*Code reviewed by Case Larsen. Previously, we just had |
| ink_assert(!conn). This prevents tunneling of packets |
| correctly---that is, you get packets from a server on a udp |
| conn. and want to send it to a player on another connection, the |
| assert will prevent that. The "if" clause enables correct |
| handling of the connection ref. counts in such a scenario. */ |
| |
| UDPConnectionInternal *&conn = static_cast<UDPPacketInternal *>(this)->conn; |
| |
| if (conn) { |
| if (conn == c) |
| return; |
| conn->Release(); |
| conn = nullptr; |
| } |
| conn = static_cast<UDPConnectionInternal *>(c); |
| conn->AddRef(); |
| } |
| |
| TS_INLINE IOBufferBlock * |
| UDPPacket::getIOBlockChain() |
| { |
| ink_assert(dynamic_cast<UDPPacketInternal *>(this) != nullptr); |
| return static_cast<UDPPacketInternal *>(this)->chain.get(); |
| } |
| |
| TS_INLINE UDPConnection * |
| UDPPacket::getConnection() |
| { |
| return static_cast<UDPPacketInternal *>(this)->conn; |
| } |
| |
| TS_INLINE UDPPacket * |
| new_UDPPacket(struct sockaddr const *to, ink_hrtime when, Ptr<IOBufferBlock> &buf) |
| { |
| UDPPacketInternal *p = udpPacketAllocator.alloc(); |
| |
| p->in_the_priority_queue = 0; |
| p->in_heap = 0; |
| p->delivery_time = when; |
| if (to) |
| ats_ip_copy(&p->to, to); |
| p->chain = buf; |
| return p; |
| } |
| |
| TS_INLINE UDPPacket * |
| new_incoming_UDPPacket(struct sockaddr *from, struct sockaddr *to, Ptr<IOBufferBlock> &block) |
| { |
| UDPPacketInternal *p = udpPacketAllocator.alloc(); |
| |
| p->in_the_priority_queue = 0; |
| p->in_heap = 0; |
| p->delivery_time = 0; |
| ats_ip_copy(&p->from, from); |
| ats_ip_copy(&p->to, to); |
| p->chain = block; |
| |
| return p; |
| } |
| |
| TS_INLINE UDPPacket * |
| new_UDPPacket() |
| { |
| UDPPacketInternal *p = udpPacketAllocator.alloc(); |
| return p; |
| } |