1182 lines
42 KiB
C++
1182 lines
42 KiB
C++
/*
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* Copyright (c) 2016 The ZLToolKit project authors. All Rights Reserved.
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*
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* This file is part of ZLToolKit(https://github.com/ZLMediaKit/ZLToolKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#include <type_traits>
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#include "sockutil.h"
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#include "Socket.h"
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#include "Util/util.h"
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#include "Util/logger.h"
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#include "Util/uv_errno.h"
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#include "Thread/semaphore.h"
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#include "Poller/EventPoller.h"
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#include "Thread/WorkThreadPool.h"
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using namespace std;
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#define LOCK_GUARD(mtx) lock_guard<decltype(mtx)> lck(mtx)
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namespace toolkit {
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StatisticImp(Socket)
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static SockException toSockException(int error) {
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switch (error) {
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case 0:
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case UV_EAGAIN: return SockException(Err_success, "success");
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case UV_ECONNREFUSED: return SockException(Err_refused, uv_strerror(error), error);
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case UV_ETIMEDOUT: return SockException(Err_timeout, uv_strerror(error), error);
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case UV_ECONNRESET: return SockException(Err_reset, uv_strerror(error), error);
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default: return SockException(Err_other, uv_strerror(error), error);
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}
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}
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static SockException getSockErr(int sock, bool try_errno = true) {
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int error = 0, len = sizeof(int);
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getsockopt(sock, SOL_SOCKET, SO_ERROR, (char *)&error, (socklen_t *)&len);
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if (error == 0) {
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if (try_errno) {
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error = get_uv_error(true);
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}
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} else {
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error = uv_translate_posix_error(error);
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}
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return toSockException(error);
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}
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Socket::Ptr Socket::createSocket(const EventPoller::Ptr &poller_in, bool enable_mutex) {
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auto poller = poller_in ? poller_in : EventPollerPool::Instance().getPoller();
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std::weak_ptr<EventPoller> weak_poller = poller;
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return Socket::Ptr(new Socket(poller, enable_mutex), [weak_poller](Socket *ptr) {
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if (auto poller = weak_poller.lock()) {
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poller->async([ptr]() { delete ptr; });
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} else {
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delete ptr;
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}
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});
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}
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Socket::Socket(EventPoller::Ptr poller, bool enable_mutex)
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: _poller(std::move(poller))
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, _mtx_sock_fd(enable_mutex)
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, _mtx_event(enable_mutex)
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, _mtx_send_buf_waiting(enable_mutex)
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, _mtx_send_buf_sending(enable_mutex) {
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memset(&_peer_addr, 0, sizeof _peer_addr);
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setOnRead(nullptr);
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setOnErr(nullptr);
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setOnAccept(nullptr);
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setOnFlush(nullptr);
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setOnBeforeAccept(nullptr);
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setOnSendResult(nullptr);
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}
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Socket::~Socket() {
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closeSock();
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}
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void Socket::setOnRead(onReadCB cb) {
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onMultiReadCB cb2;
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if (cb) {
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cb2 = [cb](Buffer::Ptr *buf, struct sockaddr_storage *addr, size_t count) {
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for (auto i = 0u; i < count; ++i) {
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cb(buf[i], (struct sockaddr *)(addr + i), sizeof(struct sockaddr_storage));
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}
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};
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}
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setOnMultiRead(std::move(cb2));
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}
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void Socket::setOnMultiRead(onMultiReadCB cb) {
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LOCK_GUARD(_mtx_event);
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if (cb) {
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_on_multi_read = std::move(cb);
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} else {
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_on_multi_read = [](Buffer::Ptr *buf, struct sockaddr_storage *addr, size_t count) {
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for (auto i = 0u; i < count; ++i) {
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WarnL << "Socket not set read callback, data ignored: " << buf[i]->size();
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}
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};
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}
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}
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void Socket::setOnErr(onErrCB cb) {
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LOCK_GUARD(_mtx_event);
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if (cb) {
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_on_err = std::move(cb);
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} else {
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_on_err = [](const SockException &err) { WarnL << "Socket not set err callback, err: " << err; };
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}
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}
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void Socket::setOnAccept(onAcceptCB cb) {
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LOCK_GUARD(_mtx_event);
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if (cb) {
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_on_accept = std::move(cb);
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} else {
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_on_accept = [](Socket::Ptr &sock, shared_ptr<void> &complete) { WarnL << "Socket not set accept callback, peer fd: " << sock->rawFD(); };
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}
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}
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void Socket::setOnFlush(onFlush cb) {
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LOCK_GUARD(_mtx_event);
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if (cb) {
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_on_flush = std::move(cb);
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} else {
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_on_flush = []() { return true; };
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}
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}
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void Socket::setOnBeforeAccept(onCreateSocket cb) {
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LOCK_GUARD(_mtx_event);
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if (cb) {
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_on_before_accept = std::move(cb);
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} else {
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_on_before_accept = [](const EventPoller::Ptr &poller) { return nullptr; };
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}
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}
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void Socket::setOnSendResult(onSendResult cb) {
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LOCK_GUARD(_mtx_event);
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_send_result = std::move(cb);
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}
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void Socket::connect(const string &url, uint16_t port, const onErrCB &con_cb_in, float timeout_sec, const string &local_ip, uint16_t local_port) {
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weak_ptr<Socket> weak_self = shared_from_this();
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// 因为涉及到异步回调，所以在poller线程中执行确保线程安全 [AUTO-TRANSLATED:e4b29f5e]
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//Because it involves asynchronous callbacks, execute in the poller thread to ensure thread safety
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_poller->async([=] {
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if (auto strong_self = weak_self.lock()) {
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strong_self->connect_l(url, port, con_cb_in, timeout_sec, local_ip, local_port);
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}
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});
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}
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void Socket::connect_l(const string &url, uint16_t port, const onErrCB &con_cb_in, float timeout_sec, const string &local_ip, uint16_t local_port) {
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// 重置当前socket [AUTO-TRANSLATED:b38093a6]
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//Reset the current socket
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closeSock();
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weak_ptr<Socket> weak_self = shared_from_this();
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auto con_cb = [con_cb_in, weak_self](const SockException &err) {
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auto strong_self = weak_self.lock();
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if (!strong_self) {
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return;
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}
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strong_self->_async_con_cb = nullptr;
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strong_self->_con_timer = nullptr;
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if (err) {
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strong_self->setSock(nullptr);
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}
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con_cb_in(err);
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};
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auto async_con_cb = std::make_shared<function<void(const SockNum::Ptr &)>>([weak_self, con_cb](const SockNum::Ptr &sock) {
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auto strong_self = weak_self.lock();
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if (!sock || !strong_self) {
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con_cb(SockException(Err_dns, get_uv_errmsg(true)));
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return;
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}
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// 监听该socket是否可写，可写表明已经连接服务器成功 [AUTO-TRANSLATED:e9809ee3]
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//Listen for whether the socket is writable, writable indicates that the connection to the server is successful
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int result = strong_self->_poller->addEvent(sock->rawFd(), EventPoller::Event_Write | EventPoller::Event_Error, [weak_self, sock, con_cb](int event) {
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if (auto strong_self = weak_self.lock()) {
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strong_self->onConnected(sock, con_cb);
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}
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});
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if (result == -1) {
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con_cb(SockException(Err_other, std::string("add event to poller failed when start connect:") + get_uv_errmsg()));
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} else {
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// 先创建SockFD对象，防止SockNum由于未执行delEvent无法析构 [AUTO-TRANSLATED:99d4e610]
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//First create the SockFD object to prevent SockNum from being destructed due to not executing delEvent
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strong_self->setSock(sock);
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}
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});
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// 连接超时定时器 [AUTO-TRANSLATED:1f4471b2]
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//Connection timeout timer
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_con_timer = std::make_shared<Timer>(timeout_sec,[weak_self, con_cb]() {
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con_cb(SockException(Err_timeout, uv_strerror(UV_ETIMEDOUT)));
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return false;
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}, _poller);
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if (isIP(url.data())) {
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auto fd = SockUtil::connect(url.data(), port, true, local_ip.data(), local_port);
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(*async_con_cb)(fd == -1 ? nullptr : std::make_shared<SockNum>(fd, SockNum::Sock_TCP));
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} else {
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auto poller = _poller;
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weak_ptr<function<void(const SockNum::Ptr &)>> weak_task = async_con_cb;
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WorkThreadPool::Instance().getExecutor()->async([url, port, local_ip, local_port, weak_task, poller]() {
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// 阻塞式dns解析放在后台线程执行 [AUTO-TRANSLATED:e54694ea]
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//Blocking DNS resolution is executed in the background thread
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int fd = SockUtil::connect(url.data(), port, true, local_ip.data(), local_port);
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auto sock = fd == -1 ? nullptr : std::make_shared<SockNum>(fd, SockNum::Sock_TCP);
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poller->async([sock, weak_task]() {
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if (auto strong_task = weak_task.lock()) {
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(*strong_task)(sock);
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}
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});
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});
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_async_con_cb = async_con_cb;
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}
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}
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void Socket::onConnected(const SockNum::Ptr &sock, const onErrCB &cb) {
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auto err = getSockErr(sock->rawFd(), false);
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if (err) {
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// 连接失败 [AUTO-TRANSLATED:50e99e6b]
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//Connection failed
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cb(err);
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return;
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}
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// 更新地址信息 [AUTO-TRANSLATED:bacb739d]
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//Update address information
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setSock(sock);
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// 先删除之前的可写事件监听 [AUTO-TRANSLATED:ca424913]
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//First delete the previous writable event listener
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_poller->delEvent(sock->rawFd(), [sock](bool) {});
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if (!attachEvent(sock)) {
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// 连接失败 [AUTO-TRANSLATED:50e99e6b]
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//Connection failed
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cb(SockException(Err_other, "add event to poller failed when connected"));
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return;
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}
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{
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LOCK_GUARD(_mtx_sock_fd);
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if (_sock_fd) {
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_sock_fd->setConnected();
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}
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}
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// 连接成功 [AUTO-TRANSLATED:7db0fbc4]
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//Connection successful
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cb(err);
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}
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bool Socket::attachEvent(const SockNum::Ptr &sock) {
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weak_ptr<Socket> weak_self = shared_from_this();
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if (sock->type() == SockNum::Sock_TCP_Server) {
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// tcp服务器 [AUTO-TRANSLATED:f4b9757f]
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//TCP server
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auto result = _poller->addEvent(sock->rawFd(), EventPoller::Event_Read | EventPoller::Event_Error, [weak_self, sock](int event) {
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if (auto strong_self = weak_self.lock()) {
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strong_self->onAccept(sock, event);
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}
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});
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return -1 != result;
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}
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// tcp客户端或udp [AUTO-TRANSLATED:00c16e7f]
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//TCP client or UDP
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auto read_buffer = _poller->getSharedBuffer(sock->type() == SockNum::Sock_UDP);
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auto result = _poller->addEvent(sock->rawFd(), EventPoller::Event_Read | EventPoller::Event_Error | EventPoller::Event_Write, [weak_self, sock, read_buffer](int event) {
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auto strong_self = weak_self.lock();
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if (!strong_self) {
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return;
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}
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if (event & EventPoller::Event_Read) {
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strong_self->onRead(sock, read_buffer);
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}
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if (event & EventPoller::Event_Write) {
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strong_self->onWriteAble(sock);
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}
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if (event & EventPoller::Event_Error) {
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if (sock->type() == SockNum::Sock_UDP) {
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// udp ignore error
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} else {
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strong_self->emitErr(getSockErr(sock->rawFd()));
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}
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}
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});
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return -1 != result;
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}
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ssize_t Socket::onRead(const SockNum::Ptr &sock, const SocketRecvBuffer::Ptr &buffer) noexcept {
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ssize_t ret = 0, nread = 0, count = 0;
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while (_enable_recv) {
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nread = buffer->recvFromSocket(sock->rawFd(), count);
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if (nread == 0) {
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if (sock->type() == SockNum::Sock_TCP) {
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emitErr(SockException(Err_eof, "end of file"));
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} else {
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WarnL << "Recv eof on udp socket[" << sock->rawFd() << "]";
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}
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return ret;
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}
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if (nread == -1) {
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auto err = get_uv_error(true);
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if (err != UV_EAGAIN) {
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if (sock->type() == SockNum::Sock_TCP) {
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emitErr(toSockException(err));
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} else {
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WarnL << "Recv err on udp socket[" << sock->rawFd() << "]: " << uv_strerror(err);
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}
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}
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return ret;
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}
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ret += nread;
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if (_enable_speed) {
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// 更新接收速率 [AUTO-TRANSLATED:1e24774c]
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//Update receive rate
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_recv_speed += nread;
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}
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auto &buf = buffer->getBuffer(0);
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auto &addr = buffer->getAddress(0);
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try {
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// 此处捕获异常，目的是防止数据未读尽，epoll边沿触发失效的问题 [AUTO-TRANSLATED:2f3f813b]
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//Catch exception here, the purpose is to prevent data from not being read completely, and the epoll edge trigger fails
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LOCK_GUARD(_mtx_event);
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_on_multi_read(&buf, &addr, count);
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} catch (std::exception &ex) {
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ErrorL << "Exception occurred when emit on_read: " << ex.what();
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}
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}
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return 0;
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}
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bool Socket::emitErr(const SockException &err) noexcept {
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if (_err_emit) {
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return true;
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}
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_err_emit = true;
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weak_ptr<Socket> weak_self = shared_from_this();
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_poller->async([weak_self, err]() {
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auto strong_self = weak_self.lock();
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if (!strong_self) {
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return;
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}
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LOCK_GUARD(strong_self->_mtx_event);
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try {
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strong_self->_on_err(err);
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} catch (std::exception &ex) {
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ErrorL << "Exception occurred when emit on_err: " << ex.what();
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}
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// 延后关闭socket，只移除其io事件，防止Session对象析构时获取fd相关信息失败 [AUTO-TRANSLATED:db5a0958]
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//Delay closing the socket, only remove its IO event, to prevent Session object destruction from failing to get fd related information
|
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strong_self->closeSock(false);
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});
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return true;
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}
|
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|
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ssize_t Socket::send(const char *buf, size_t size, struct sockaddr *addr, socklen_t addr_len, bool try_flush) {
|
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if (size <= 0) {
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size = strlen(buf);
|
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if (!size) {
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return 0;
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}
|
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}
|
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auto ptr = BufferRaw::create();
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ptr->assign(buf, size);
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return send(std::move(ptr), addr, addr_len, try_flush);
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}
|
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|
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ssize_t Socket::send(string buf, struct sockaddr *addr, socklen_t addr_len, bool try_flush) {
|
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return send(std::make_shared<BufferString>(std::move(buf)), addr, addr_len, try_flush);
|
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}
|
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|
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ssize_t Socket::send(Buffer::Ptr buf, struct sockaddr *addr, socklen_t addr_len, bool try_flush) {
|
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if (!addr) {
|
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if (!_udp_send_dst) {
|
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return send_l(std::move(buf), false, try_flush);
|
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}
|
||
// 本次发送未指定目标地址，但是目标定制已通过bindPeerAddr指定 [AUTO-TRANSLATED:afb6ce35]
|
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//This send did not specify a target address, but the target is customized through bindPeerAddr
|
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addr = (struct sockaddr *)_udp_send_dst.get();
|
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addr_len = SockUtil::get_sock_len(addr);
|
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} else {
|
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if (_peer_addr.ss_family != AF_UNSPEC) {
|
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// udp connect后不能再sendto指定其他地址
|
||
return send_l(std::move(buf), false, try_flush);
|
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}
|
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}
|
||
return send_l(std::make_shared<BufferSock>(std::move(buf), addr, addr_len), true, try_flush);
|
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}
|
||
|
||
ssize_t Socket::send_l(Buffer::Ptr buf, bool is_buf_sock, bool try_flush) {
|
||
auto size = buf ? buf->size() : 0;
|
||
if (!size) {
|
||
return 0;
|
||
}
|
||
|
||
{
|
||
LOCK_GUARD(_mtx_send_buf_waiting);
|
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_send_buf_waiting.emplace_back(std::move(buf), is_buf_sock);
|
||
}
|
||
|
||
if (try_flush) {
|
||
if (flushAll()) {
|
||
return -1;
|
||
}
|
||
}
|
||
|
||
return size;
|
||
}
|
||
|
||
int Socket::flushAll() {
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
|
||
if (!_sock_fd) {
|
||
// 如果已断开连接或者发送超时 [AUTO-TRANSLATED:2e25a648]
|
||
//If the connection is already disconnected or the send has timed out
|
||
return -1;
|
||
}
|
||
if (_sendable) {
|
||
// 该socket可写 [AUTO-TRANSLATED:9b37b658]
|
||
//The socket is writable
|
||
return flushData(_sock_fd->sockNum(), false) ? 0 : -1;
|
||
}
|
||
|
||
// 该socket不可写,判断发送超时 [AUTO-TRANSLATED:cad042e3]
|
||
//The socket is not writable, judging send timeout
|
||
if (_send_flush_ticker.elapsedTime() > _max_send_buffer_ms) {
|
||
// 如果发送列队中最老的数据距今超过超时时间限制，那么就断开socket连接 [AUTO-TRANSLATED:19ee680e]
|
||
//If the oldest data in the send queue exceeds the timeout limit, disconnect the socket connection
|
||
emitErr(SockException(Err_other, "socket send timeout"));
|
||
return -1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
void Socket::onFlushed() {
|
||
bool flag;
|
||
{
|
||
LOCK_GUARD(_mtx_event);
|
||
flag = _on_flush();
|
||
}
|
||
if (!flag) {
|
||
setOnFlush(nullptr);
|
||
}
|
||
}
|
||
|
||
void Socket::closeSock(bool close_fd) {
|
||
_sendable = true;
|
||
_enable_recv = true;
|
||
_enable_speed = false;
|
||
_con_timer = nullptr;
|
||
_async_con_cb = nullptr;
|
||
_send_flush_ticker.resetTime();
|
||
|
||
{
|
||
LOCK_GUARD(_mtx_send_buf_waiting);
|
||
_send_buf_waiting.clear();
|
||
}
|
||
|
||
{
|
||
LOCK_GUARD(_mtx_send_buf_sending);
|
||
_send_buf_sending.clear();
|
||
}
|
||
|
||
{
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
if (close_fd) {
|
||
_err_emit = false;
|
||
_sock_fd = nullptr;
|
||
} else if (_sock_fd) {
|
||
_sock_fd->delEvent();
|
||
}
|
||
}
|
||
}
|
||
|
||
size_t Socket::getSendBufferCount() {
|
||
size_t ret = 0;
|
||
{
|
||
LOCK_GUARD(_mtx_send_buf_waiting);
|
||
ret += _send_buf_waiting.size();
|
||
}
|
||
|
||
{
|
||
LOCK_GUARD(_mtx_send_buf_sending);
|
||
_send_buf_sending.for_each([&](BufferList::Ptr &buf) { ret += buf->count(); });
|
||
}
|
||
return ret;
|
||
}
|
||
|
||
uint64_t Socket::elapsedTimeAfterFlushed() {
|
||
return _send_flush_ticker.elapsedTime();
|
||
}
|
||
|
||
size_t Socket::getRecvSpeed() {
|
||
_enable_speed = true;
|
||
return _recv_speed.getSpeed();
|
||
}
|
||
|
||
size_t Socket::getSendSpeed() {
|
||
_enable_speed = true;
|
||
return _send_speed.getSpeed();
|
||
}
|
||
|
||
size_t Socket::getRecvTotalBytes() {
|
||
_enable_speed = true;
|
||
return _recv_speed.getTotalBytes();
|
||
}
|
||
|
||
size_t Socket::getSendTotalBytes() {
|
||
_enable_speed = true;
|
||
return _send_speed.getTotalBytes();
|
||
}
|
||
|
||
bool Socket::listen(uint16_t port, const string &local_ip, int backlog) {
|
||
closeSock();
|
||
int fd = SockUtil::listen(port, local_ip.data(), backlog);
|
||
if (fd == -1) {
|
||
return false;
|
||
}
|
||
return fromSock_l(std::make_shared<SockNum>(fd, SockNum::Sock_TCP_Server));
|
||
}
|
||
|
||
bool Socket::bindUdpSock(uint16_t port, const string &local_ip, bool enable_reuse) {
|
||
closeSock();
|
||
int fd = SockUtil::bindUdpSock(port, local_ip.data(), enable_reuse);
|
||
if (fd == -1) {
|
||
return false;
|
||
}
|
||
return fromSock_l(std::make_shared<SockNum>(fd, SockNum::Sock_UDP));
|
||
}
|
||
|
||
bool Socket::fromSock(int fd, SockNum::SockType type) {
|
||
closeSock();
|
||
SockUtil::setNoSigpipe(fd);
|
||
SockUtil::setNoBlocked(fd);
|
||
SockUtil::setCloExec(fd);
|
||
return fromSock_l(std::make_shared<SockNum>(fd, type));
|
||
}
|
||
|
||
bool Socket::fromSock_l(SockNum::Ptr sock) {
|
||
if (!attachEvent(sock)) {
|
||
return false;
|
||
}
|
||
setSock(std::move(sock));
|
||
return true;
|
||
}
|
||
|
||
void Socket::moveTo(EventPoller::Ptr poller) {
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
if (poller) {
|
||
_poller = std::move(poller);
|
||
}
|
||
if (_sock_fd) {
|
||
_sock_fd = std::make_shared<SockFD>(_sock_fd->sockNum(), _poller);
|
||
}
|
||
}
|
||
|
||
int Socket::onAccept(const SockNum::Ptr &sock, int event) noexcept {
|
||
int fd;
|
||
struct sockaddr_storage peer_addr;
|
||
socklen_t addr_len = sizeof(peer_addr);
|
||
while (true) {
|
||
if (event & EventPoller::Event_Read) {
|
||
do {
|
||
fd = (int)accept(sock->rawFd(), (struct sockaddr *)&peer_addr, &addr_len);
|
||
} while (-1 == fd && UV_EINTR == get_uv_error(true));
|
||
|
||
if (fd == -1) {
|
||
// accept失败 [AUTO-TRANSLATED:496cc51e]
|
||
//Accept failed
|
||
int err = get_uv_error(true);
|
||
if (err == UV_EAGAIN) {
|
||
// 没有新连接 [AUTO-TRANSLATED:4ddd97d6]
|
||
//No new connection
|
||
return 0;
|
||
}
|
||
auto ex = toSockException(err);
|
||
// emitErr(ex); https://github.com/ZLMediaKit/ZLMediaKit/issues/2946
|
||
ErrorL << "Accept socket failed: " << ex.what();
|
||
// 可能打开的文件描述符太多了:UV_EMFILE/UV_ENFILE [AUTO-TRANSLATED:ecd1b4f1]
|
||
//Possibly too many open file descriptors: UV_EMFILE/UV_ENFILE
|
||
#if (defined(HAS_EPOLL) && !defined(_WIN32)) || defined(HAS_KQUEUE)
|
||
// 边缘触发，还需要手动再触发accept事件, [AUTO-TRANSLATED:85fa9030]
|
||
//Edge trigger, need to manually trigger the accept event again
|
||
// wepoll, Edge-triggered (`EPOLLET`) mode isn't supported.
|
||
std::weak_ptr<Socket> weak_self = shared_from_this();
|
||
_poller->doDelayTask(100, [weak_self, sock]() {
|
||
if (auto strong_self = weak_self.lock()) {
|
||
// 100ms后再处理accept事件，说不定已经有空闲的fd [AUTO-TRANSLATED:532951a2]
|
||
//Process the accept event again after 100ms, maybe there are available fds
|
||
strong_self->onAccept(sock, EventPoller::Event_Read);
|
||
}
|
||
return 0;
|
||
});
|
||
// 暂时不处理accept事件，等待100ms后手动触发onAccept(只有EAGAIN读空后才能通过epoll再次触发事件) [AUTO-TRANSLATED:32636aea]
|
||
//Temporarily do not process the accept event, wait 100ms and manually trigger onAccept (can only be triggered again through epoll after EAGAIN reads empty)
|
||
return -1;
|
||
#else
|
||
// 水平触发；休眠10ms，防止无谓的accept失败 [AUTO-TRANSLATED:6f8349bb]
|
||
//Level trigger; sleep 10ms to prevent unnecessary accept failures
|
||
this_thread::sleep_for(std::chrono::milliseconds(10));
|
||
// 暂时不处理accept事件，由于是水平触发，下次还会再次自动进入onAccept函数 [AUTO-TRANSLATED:9aec1432]
|
||
//Temporarily do not process the accept event, as it is level trigger, it will automatically enter the onAccept function again next time
|
||
return -1;
|
||
#endif
|
||
}
|
||
|
||
SockUtil::setNoSigpipe(fd);
|
||
SockUtil::setNoBlocked(fd);
|
||
SockUtil::setNoDelay(fd);
|
||
SockUtil::setSendBuf(fd);
|
||
SockUtil::setRecvBuf(fd);
|
||
SockUtil::setCloseWait(fd);
|
||
SockUtil::setCloExec(fd);
|
||
|
||
Socket::Ptr peer_sock;
|
||
try {
|
||
// 此处捕获异常，目的是防止socket未accept尽，epoll边沿触发失效的问题 [AUTO-TRANSLATED:523d496d]
|
||
//Catch exceptions here to prevent the problem of epoll edge trigger failure when the socket is not fully accepted
|
||
LOCK_GUARD(_mtx_event);
|
||
// 拦截Socket对象的构造 [AUTO-TRANSLATED:b38b67b9]
|
||
//Intercept the Socket object's constructor
|
||
peer_sock = _on_before_accept(_poller);
|
||
} catch (std::exception &ex) {
|
||
ErrorL << "Exception occurred when emit on_before_accept: " << ex.what();
|
||
close(fd);
|
||
continue;
|
||
}
|
||
|
||
if (!peer_sock) {
|
||
// 此处是默认构造行为，也就是子Socket共用父Socket的poll线程并且关闭互斥锁 [AUTO-TRANSLATED:6c057de0]
|
||
//This is the default construction behavior, which means the child Socket shares the parent Socket's poll thread and closes the mutex lock
|
||
peer_sock = Socket::createSocket(_poller, false);
|
||
}
|
||
|
||
auto sock = std::make_shared<SockNum>(fd, SockNum::Sock_TCP);
|
||
// 设置好fd,以备在onAccept事件中可以正常访问该fd [AUTO-TRANSLATED:e3e3c225]
|
||
//Set the fd properly, so that it can be accessed normally in the onAccept event
|
||
peer_sock->setSock(sock);
|
||
// 赋值peer ip，防止在执行setSock时，fd已经被reset断开 [AUTO-TRANSLATED:7ca197db]
|
||
//Assign the peer ip to prevent the fd from being reset and disconnected when executing setSock
|
||
memcpy(&peer_sock->_peer_addr, &peer_addr, addr_len);
|
||
|
||
shared_ptr<void> completed(nullptr, [peer_sock, sock](void *) {
|
||
try {
|
||
// 然后把该fd加入poll监听(确保先触发onAccept事件然后再触发onRead等事件) [AUTO-TRANSLATED:45618926]
|
||
//Then add the fd to the poll monitoring (ensure that the onAccept event is triggered first, followed by onRead and other events)
|
||
if (!peer_sock->attachEvent(sock)) {
|
||
// 加入poll监听失败，触发onErr事件，通知该Socket无效 [AUTO-TRANSLATED:e81fd478]
|
||
//If adding to poll monitoring fails, trigger the onErr event to notify that the Socket is invalid
|
||
peer_sock->emitErr(SockException(Err_eof, "add event to poller failed when accept a socket"));
|
||
}
|
||
} catch (std::exception &ex) {
|
||
ErrorL << "Exception occurred: " << ex.what();
|
||
}
|
||
});
|
||
|
||
try {
|
||
// 此处捕获异常，目的是防止socket未accept尽，epoll边沿触发失效的问题 [AUTO-TRANSLATED:523d496d]
|
||
//Catch exceptions here to prevent the problem of socket not being accepted and epoll edge triggering failure
|
||
LOCK_GUARD(_mtx_event);
|
||
// 先触发onAccept事件，此时应该监听该Socket的onRead等事件 [AUTO-TRANSLATED:29734871]
|
||
//First trigger the onAccept event, at this point, you should listen for onRead and other events of the Socket
|
||
_on_accept(peer_sock, completed);
|
||
} catch (std::exception &ex) {
|
||
ErrorL << "Exception occurred when emit on_accept: " << ex.what();
|
||
continue;
|
||
}
|
||
}
|
||
|
||
if (event & EventPoller::Event_Error) {
|
||
auto ex = getSockErr(sock->rawFd());
|
||
emitErr(ex);
|
||
ErrorL << "TCP listener occurred a err: " << ex.what();
|
||
return -1;
|
||
}
|
||
}
|
||
}
|
||
|
||
void Socket::setSock(SockNum::Ptr sock) {
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
if (sock) {
|
||
_sock_fd = std::make_shared<SockFD>(std::move(sock), _poller);
|
||
SockUtil::get_sock_local_addr(_sock_fd->rawFd(), _local_addr);
|
||
SockUtil::get_sock_peer_addr(_sock_fd->rawFd(), _peer_addr);
|
||
} else {
|
||
_sock_fd = nullptr;
|
||
}
|
||
}
|
||
|
||
string Socket::get_local_ip() {
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
if (!_sock_fd) {
|
||
return "";
|
||
}
|
||
return SockUtil::inet_ntoa((struct sockaddr *)&_local_addr);
|
||
}
|
||
|
||
uint16_t Socket::get_local_port() {
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
if (!_sock_fd) {
|
||
return 0;
|
||
}
|
||
return SockUtil::inet_port((struct sockaddr *)&_local_addr);
|
||
}
|
||
|
||
const sockaddr *Socket::get_local_addr() {
|
||
return (const sockaddr*)&_local_addr;
|
||
}
|
||
|
||
const sockaddr *Socket::get_peer_addr() {
|
||
if (_udp_send_dst)
|
||
return (const sockaddr *)_udp_send_dst.get();
|
||
else
|
||
return (const sockaddr *)&_peer_addr;
|
||
}
|
||
|
||
string Socket::get_peer_ip() {
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
if (!_sock_fd) {
|
||
return "";
|
||
}
|
||
if (_udp_send_dst) {
|
||
return SockUtil::inet_ntoa((struct sockaddr *)_udp_send_dst.get());
|
||
}
|
||
return SockUtil::inet_ntoa((struct sockaddr *)&_peer_addr);
|
||
}
|
||
|
||
uint16_t Socket::get_peer_port() {
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
if (!_sock_fd) {
|
||
return 0;
|
||
}
|
||
if (_udp_send_dst) {
|
||
return SockUtil::inet_port((struct sockaddr *)_udp_send_dst.get());
|
||
}
|
||
return SockUtil::inet_port((struct sockaddr *)&_peer_addr);
|
||
}
|
||
|
||
string Socket::getIdentifier() const {
|
||
static string class_name = "Socket: ";
|
||
return class_name + to_string(reinterpret_cast<uint64_t>(this));
|
||
}
|
||
|
||
bool Socket::flushData(const SockNum::Ptr &sock, bool poller_thread) {
|
||
decltype(_send_buf_sending) send_buf_sending_tmp;
|
||
{
|
||
// 转移出二级缓存 [AUTO-TRANSLATED:a54264d2]
|
||
//Transfer out of the secondary cache
|
||
LOCK_GUARD(_mtx_send_buf_sending);
|
||
if (!_send_buf_sending.empty()) {
|
||
send_buf_sending_tmp.swap(_send_buf_sending);
|
||
}
|
||
}
|
||
|
||
if (send_buf_sending_tmp.empty()) {
|
||
_send_flush_ticker.resetTime();
|
||
do {
|
||
{
|
||
// 二级发送缓存为空，那么我们接着消费一级缓存中的数据 [AUTO-TRANSLATED:8ddb2962]
|
||
//The secondary send cache is empty, so we continue to consume data from the primary cache
|
||
LOCK_GUARD(_mtx_send_buf_waiting);
|
||
if (!_send_buf_waiting.empty()) {
|
||
// 把一级缓中数数据放置到二级缓存中并清空 [AUTO-TRANSLATED:4884aa58]
|
||
//Put the data from the first-level cache into the second-level cache and clear it
|
||
LOCK_GUARD(_mtx_event);
|
||
auto send_result = _enable_speed ? [this](const Buffer::Ptr &buffer, bool send_success) {
|
||
if (send_success) {
|
||
//更新发送速率 [AUTO-TRANSLATED:e35a1eba]
|
||
//Update the sending rate
|
||
_send_speed += buffer->size();
|
||
}
|
||
LOCK_GUARD(_mtx_event);
|
||
if (_send_result) {
|
||
_send_result(buffer, send_success);
|
||
}
|
||
} : _send_result;
|
||
send_buf_sending_tmp.emplace_back(BufferList::create(std::move(_send_buf_waiting), std::move(send_result), sock->type() == SockNum::Sock_UDP));
|
||
break;
|
||
}
|
||
}
|
||
// 如果一级缓存也为空,那么说明所有数据均写入socket了 [AUTO-TRANSLATED:6ae9ef8a]
|
||
//If the first-level cache is also empty, it means that all data has been written to the socket
|
||
if (poller_thread) {
|
||
// poller线程触发该函数，那么该socket应该已经加入了可写事件的监听； [AUTO-TRANSLATED:5a8e123d]
|
||
//The poller thread triggers this function, so the socket should have been added to the writable event listening
|
||
// 那么在数据列队清空的情况下，我们需要关闭监听以免触发无意义的事件回调 [AUTO-TRANSLATED:0fb35573]
|
||
//So, in the case of data queue clearing, we need to close the listening to avoid triggering meaningless event callbacks
|
||
stopWriteAbleEvent(sock);
|
||
onFlushed();
|
||
}
|
||
return true;
|
||
} while (false);
|
||
}
|
||
|
||
while (!send_buf_sending_tmp.empty()) {
|
||
auto &packet = send_buf_sending_tmp.front();
|
||
auto n = packet->send(sock->rawFd(), _sock_flags);
|
||
if (n > 0) {
|
||
// 全部或部分发送成功 [AUTO-TRANSLATED:0721ed7c]
|
||
//All or part of the data was sent successfully
|
||
if (packet->empty()) {
|
||
// 全部发送成功 [AUTO-TRANSLATED:38a7d0ac]
|
||
//All data was sent successfully
|
||
send_buf_sending_tmp.pop_front();
|
||
continue;
|
||
}
|
||
// 部分发送成功 [AUTO-TRANSLATED:bd6609dd]
|
||
//Part of the data was sent successfully
|
||
if (!poller_thread) {
|
||
// 如果该函数是poller线程触发的，那么该socket应该已经加入了可写事件的监听，所以我们不需要再次加入监听 [AUTO-TRANSLATED:917049f0]
|
||
//If this function is triggered by the poller thread, the socket should have been added to the writable event listening, so we don't need to add listening again
|
||
startWriteAbleEvent(sock);
|
||
}
|
||
break;
|
||
}
|
||
|
||
// 一个都没发送成功 [AUTO-TRANSLATED:a3b4f257]
|
||
//None of the data was sent successfully
|
||
int err = get_uv_error(true);
|
||
if (err == UV_EAGAIN) {
|
||
// 等待下一次发送 [AUTO-TRANSLATED:22980496]
|
||
//Wait for the next send
|
||
if (!poller_thread) {
|
||
// 如果该函数是poller线程触发的，那么该socket应该已经加入了可写事件的监听，所以我们不需要再次加入监听 [AUTO-TRANSLATED:917049f0]
|
||
//If this function is triggered by the poller thread, the socket should have already been added to the writable event listener, so we don't need to add it again
|
||
startWriteAbleEvent(sock);
|
||
}
|
||
break;
|
||
}
|
||
|
||
// 其他错误代码，发生异常 [AUTO-TRANSLATED:14cca084]
|
||
//Other error codes, an exception occurred
|
||
if (sock->type() == SockNum::Sock_UDP) {
|
||
// udp发送异常，把数据丢弃 [AUTO-TRANSLATED:3a7d095d]
|
||
//UDP send exception, discard the data
|
||
send_buf_sending_tmp.pop_front();
|
||
WarnL << "Send udp socket[" << sock->rawFd() << "] failed, data ignored: " << uv_strerror(err);
|
||
continue;
|
||
}
|
||
// tcp发送失败时，触发异常 [AUTO-TRANSLATED:06f06449]
|
||
//TCP send failed, trigger an exception
|
||
emitErr(toSockException(err));
|
||
return false;
|
||
}
|
||
|
||
// 回滚未发送完毕的数据 [AUTO-TRANSLATED:9f67c1be]
|
||
//Roll back the unsent data
|
||
if (!send_buf_sending_tmp.empty()) {
|
||
// 有剩余数据 [AUTO-TRANSLATED:14a89b15]
|
||
//There is remaining data
|
||
LOCK_GUARD(_mtx_send_buf_sending);
|
||
send_buf_sending_tmp.swap(_send_buf_sending);
|
||
_send_buf_sending.append(send_buf_sending_tmp);
|
||
// 二级缓存未全部发送完毕，说明该socket不可写，直接返回 [AUTO-TRANSLATED:2d7f9f2f]
|
||
//The secondary cache has not been sent completely, indicating that the socket is not writable, return directly
|
||
return true;
|
||
}
|
||
|
||
// 二级缓存已经全部发送完毕，说明该socket还可写，我们尝试继续写 [AUTO-TRANSLATED:2c2bc316]
|
||
//The secondary cache has been sent completely, indicating that the socket is still writable, we try to continue writing
|
||
// 如果是poller线程，我们尝试再次写一次(因为可能其他线程调用了send函数又有新数据了) [AUTO-TRANSLATED:392684a8]
|
||
//If it's the poller thread, we try to write again (because other threads may have called the send function and there is new data)
|
||
return poller_thread ? flushData(sock, poller_thread) : true;
|
||
}
|
||
|
||
void Socket::onWriteAble(const SockNum::Ptr &sock) {
|
||
bool empty_waiting;
|
||
bool empty_sending;
|
||
{
|
||
LOCK_GUARD(_mtx_send_buf_waiting);
|
||
empty_waiting = _send_buf_waiting.empty();
|
||
}
|
||
|
||
{
|
||
LOCK_GUARD(_mtx_send_buf_sending);
|
||
empty_sending = _send_buf_sending.empty();
|
||
}
|
||
|
||
if (empty_waiting && empty_sending) {
|
||
// 数据已经清空了，我们停止监听可写事件 [AUTO-TRANSLATED:751f7e4e]
|
||
//Data has been cleared, we stop listening for writable events
|
||
stopWriteAbleEvent(sock);
|
||
} else {
|
||
// socket可写，我们尝试发送剩余的数据 [AUTO-TRANSLATED:d66e0207]
|
||
//Socket is writable, we try to send the remaining data
|
||
flushData(sock, true);
|
||
}
|
||
}
|
||
|
||
void Socket::startWriteAbleEvent(const SockNum::Ptr &sock) {
|
||
// 开始监听socket可写事件 [AUTO-TRANSLATED:31ba90c5]
|
||
//Start listening for socket writable events
|
||
_sendable = false;
|
||
int flag = _enable_recv ? EventPoller::Event_Read : 0;
|
||
_poller->modifyEvent(sock->rawFd(), flag | EventPoller::Event_Error | EventPoller::Event_Write, [sock](bool) {});
|
||
}
|
||
|
||
void Socket::stopWriteAbleEvent(const SockNum::Ptr &sock) {
|
||
// 停止监听socket可写事件 [AUTO-TRANSLATED:4eb5b241]
|
||
//Stop listening for socket writable events
|
||
_sendable = true;
|
||
int flag = _enable_recv ? EventPoller::Event_Read : 0;
|
||
_poller->modifyEvent(sock->rawFd(), flag | EventPoller::Event_Error, [sock](bool) {});
|
||
}
|
||
|
||
void Socket::enableRecv(bool enabled) {
|
||
if (_enable_recv == enabled) {
|
||
return;
|
||
}
|
||
_enable_recv = enabled;
|
||
int read_flag = _enable_recv ? EventPoller::Event_Read : 0;
|
||
// 可写时，不监听可写事件 [AUTO-TRANSLATED:6a50e751]
|
||
//Do not listen for writable events when writable
|
||
int send_flag = _sendable ? 0 : EventPoller::Event_Write;
|
||
_poller->modifyEvent(rawFD(), read_flag | send_flag | EventPoller::Event_Error);
|
||
}
|
||
|
||
int Socket::rawFD() const {
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
if (!_sock_fd) {
|
||
return -1;
|
||
}
|
||
return _sock_fd->rawFd();
|
||
}
|
||
|
||
bool Socket::alive() const {
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
return _sock_fd && !_err_emit;
|
||
}
|
||
|
||
SockNum::SockType Socket::sockType() const {
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
if (!_sock_fd) {
|
||
return SockNum::Sock_Invalid;
|
||
}
|
||
return _sock_fd->type();
|
||
}
|
||
|
||
void Socket::setSendTimeOutSecond(uint32_t second) {
|
||
_max_send_buffer_ms = second * 1000;
|
||
}
|
||
|
||
bool Socket::isSocketBusy() const {
|
||
return !_sendable.load();
|
||
}
|
||
|
||
const EventPoller::Ptr &Socket::getPoller() const {
|
||
return _poller;
|
||
}
|
||
|
||
std::shared_ptr<void> Socket::cloneSocket(const Socket &other) {
|
||
closeSock();
|
||
SockNum::Ptr sock;
|
||
{
|
||
LOCK_GUARD(other._mtx_sock_fd);
|
||
if (!other._sock_fd) {
|
||
WarnL << "sockfd of src socket is null";
|
||
return nullptr;
|
||
}
|
||
sock = other._sock_fd->sockNum();
|
||
}
|
||
setSock(sock);
|
||
std::weak_ptr<Socket> weak_self = shared_from_this();
|
||
// 0x01无实际意义，仅代表成功
|
||
return std::shared_ptr<void>(reinterpret_cast<void *>(0x01), [weak_self, sock](void *) {
|
||
if (auto strong_self = weak_self.lock()) {
|
||
if (!strong_self->attachEvent(sock)) {
|
||
WarnL << "attachEvent failed: " << sock->rawFd();
|
||
}
|
||
}
|
||
});
|
||
}
|
||
|
||
bool Socket::bindPeerAddr(const struct sockaddr *dst_addr, socklen_t addr_len, bool soft_bind) {
|
||
LOCK_GUARD(_mtx_sock_fd);
|
||
if (!_sock_fd) {
|
||
return false;
|
||
}
|
||
if (_sock_fd->type() != SockNum::Sock_UDP) {
|
||
return false;
|
||
}
|
||
addr_len = addr_len ? addr_len : SockUtil::get_sock_len(dst_addr);
|
||
if (soft_bind) {
|
||
// 软绑定，只保存地址 [AUTO-TRANSLATED:e74e9b53]
|
||
//Soft bind, only save the address
|
||
_udp_send_dst = std::make_shared<struct sockaddr_storage>();
|
||
memcpy(_udp_send_dst.get(), dst_addr, addr_len);
|
||
} else {
|
||
// 硬绑定后，取消软绑定，防止memcpy目标地址的性能损失 [AUTO-TRANSLATED:f3f26702]
|
||
//After hard binding, cancel soft binding to prevent performance loss of memcpy target address
|
||
_udp_send_dst = nullptr;
|
||
if (-1 == ::connect(_sock_fd->rawFd(), dst_addr, addr_len)) {
|
||
WarnL << "Connect socket to peer address failed: " << SockUtil::inet_ntoa(dst_addr);
|
||
return false;
|
||
}
|
||
memcpy(&_peer_addr, dst_addr, addr_len);
|
||
}
|
||
return true;
|
||
}
|
||
|
||
void Socket::setSendFlags(int flags) {
|
||
_sock_flags = flags;
|
||
}
|
||
|
||
///////////////SockSender///////////////////
|
||
|
||
SockSender &SockSender::operator<<(const char *buf) {
|
||
send(buf);
|
||
return *this;
|
||
}
|
||
|
||
SockSender &SockSender::operator<<(string buf) {
|
||
send(std::move(buf));
|
||
return *this;
|
||
}
|
||
|
||
SockSender &SockSender::operator<<(Buffer::Ptr buf) {
|
||
send(std::move(buf));
|
||
return *this;
|
||
}
|
||
|
||
ssize_t SockSender::send(string buf) {
|
||
return send(std::make_shared<BufferString>(std::move(buf)));
|
||
}
|
||
|
||
ssize_t SockSender::send(const char *buf, size_t size) {
|
||
auto buffer = BufferRaw::create();
|
||
buffer->assign(buf, size);
|
||
return send(std::move(buffer));
|
||
}
|
||
|
||
///////////////SocketHelper///////////////////
|
||
|
||
SocketHelper::SocketHelper(const Socket::Ptr &sock) {
|
||
setSock(sock);
|
||
setOnCreateSocket(nullptr);
|
||
}
|
||
|
||
void SocketHelper::setPoller(const EventPoller::Ptr &poller) {
|
||
_poller = poller;
|
||
}
|
||
|
||
void SocketHelper::setSock(const Socket::Ptr &sock) {
|
||
_sock = sock;
|
||
if (_sock) {
|
||
_poller = _sock->getPoller();
|
||
}
|
||
}
|
||
|
||
const EventPoller::Ptr &SocketHelper::getPoller() const {
|
||
assert(_poller);
|
||
return _poller;
|
||
}
|
||
|
||
const Socket::Ptr &SocketHelper::getSock() const {
|
||
return _sock;
|
||
}
|
||
|
||
int SocketHelper::flushAll() {
|
||
if (!_sock) {
|
||
return -1;
|
||
}
|
||
return _sock->flushAll();
|
||
}
|
||
|
||
ssize_t SocketHelper::send(Buffer::Ptr buf) {
|
||
if (!_sock) {
|
||
return -1;
|
||
}
|
||
return _sock->send(std::move(buf), nullptr, 0, _try_flush);
|
||
}
|
||
|
||
ssize_t SocketHelper::sendto(Buffer::Ptr buf, struct sockaddr *addr, socklen_t addr_len) {
|
||
if (!_sock) {
|
||
return -1;
|
||
}
|
||
return _sock->send(std::move(buf), addr, addr_len, _try_flush);
|
||
}
|
||
|
||
void SocketHelper::shutdown(const SockException &ex) {
|
||
if (_sock) {
|
||
_sock->emitErr(ex);
|
||
}
|
||
}
|
||
|
||
void SocketHelper::safeShutdown(const SockException &ex) {
|
||
std::weak_ptr<SocketHelper> weak_self = shared_from_this();
|
||
async_first([weak_self, ex]() {
|
||
if (auto strong_self = weak_self.lock()) {
|
||
strong_self->shutdown(ex);
|
||
}
|
||
});
|
||
}
|
||
|
||
string SocketHelper::get_local_ip() {
|
||
return _sock ? _sock->get_local_ip() : "";
|
||
}
|
||
|
||
uint16_t SocketHelper::get_local_port() {
|
||
return _sock ? _sock->get_local_port() : 0;
|
||
}
|
||
|
||
string SocketHelper::get_peer_ip() {
|
||
return _sock ? _sock->get_peer_ip() : "";
|
||
}
|
||
|
||
uint16_t SocketHelper::get_peer_port() {
|
||
return _sock ? _sock->get_peer_port() : 0;
|
||
}
|
||
|
||
const sockaddr * SocketHelper::get_peer_addr() {
|
||
return _sock ? _sock->get_peer_addr() : nullptr;
|
||
}
|
||
|
||
const sockaddr *SocketHelper::get_local_addr() {
|
||
return _sock ? _sock->get_local_addr() : nullptr;
|
||
}
|
||
|
||
bool SocketHelper::isSocketBusy() const {
|
||
if (!_sock) {
|
||
return true;
|
||
}
|
||
return _sock->isSocketBusy();
|
||
}
|
||
|
||
Task::Ptr SocketHelper::async(TaskIn task, bool may_sync) {
|
||
return _poller->async(std::move(task), may_sync);
|
||
}
|
||
|
||
Task::Ptr SocketHelper::async_first(TaskIn task, bool may_sync) {
|
||
return _poller->async_first(std::move(task), may_sync);
|
||
}
|
||
|
||
void SocketHelper::setSendFlushFlag(bool try_flush) {
|
||
_try_flush = try_flush;
|
||
}
|
||
|
||
void SocketHelper::setSendFlags(int flags) {
|
||
if (!_sock) {
|
||
return;
|
||
}
|
||
_sock->setSendFlags(flags);
|
||
}
|
||
|
||
void SocketHelper::setOnCreateSocket(Socket::onCreateSocket cb) {
|
||
if (cb) {
|
||
_on_create_socket = std::move(cb);
|
||
} else {
|
||
_on_create_socket = [](const EventPoller::Ptr &poller) { return Socket::createSocket(poller, false); };
|
||
}
|
||
}
|
||
|
||
Socket::Ptr SocketHelper::createSocket() {
|
||
return _on_create_socket(_poller);
|
||
}
|
||
|
||
std::ostream &operator<<(std::ostream &ost, const SockException &err) {
|
||
ost << err.getErrCode() << "(" << err.what() << ")";
|
||
return ost;
|
||
}
|
||
|
||
} // namespace toolkit
|