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Added a socket implementation.
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341
sfw/core/socket.cpp
Executable file
341
sfw/core/socket.cpp
Executable file
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#include "socket.h"
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//Based on:
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/**
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*
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* Socket.cc
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* An Tao
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*
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* Public header file in trantor lib.
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*
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* Copyright 2018, An Tao. All rights reserved.
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* Use of this source code is governed by a BSD-style license
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* that can be found in the License file.
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*
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*
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*/
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#ifndef _WIN32
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#include <unistd.h>
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#endif
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#include <fcntl.h>
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///usr/include/asm-generic/errno-base.h
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//http://www.virtsync.com/c-error-codes-include-errno
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#include<cerrno>
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#ifdef _WIN32
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#include <ws2tcpip.h>
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#else
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#include <sys/socket.h>
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#include <netinet/tcp.h>
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#endif
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void Socket::create_net_socket()
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{
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create(AF_INET);
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}
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void Socket::create(int family)
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{
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#ifdef __linux__
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_socket = ::socket(family, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, IPPROTO_TCP);
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#else
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_socket = static_cast<int>(::socket(family, SOCK_STREAM, IPPROTO_TCP));
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#endif
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}
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// taken from muduo
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void Socket::set_non_block_and_close_on_exit()
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{
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#ifdef _WIN32
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// TODO how to set FD_CLOEXEC on windows? is it necessary?
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u_long arg = 1;
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auto ret = ioctlsocket(_socket, (long)FIONBIO, &arg);
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if (ret)
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{
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LOG_ERR("ioctlsocket error");
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}
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#else
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// non-block
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int flags = ::fcntl(_socket, F_GETFL, 0);
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flags |= O_NONBLOCK;
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int ret = ::fcntl(_socket, F_SETFL, flags);
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// TODO check
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// close-on-exec
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flags = ::fcntl(_socket, F_GETFD, 0);
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flags |= FD_CLOEXEC;
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ret = ::fcntl(_socket, F_SETFD, flags);
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// TODO check
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(void)ret;
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#endif
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}
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int Socket::get_error()
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{
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int optval;
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socklen_t optlen = static_cast<socklen_t>(sizeof optval);
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#ifdef _WIN32
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if (::getsockopt(_socket, SOL_SOCKET, SO_ERROR, (char *)&optval, &optlen) < 0)
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#else
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if (::getsockopt(_socket, SOL_SOCKET, SO_ERROR, &optval, &optlen) < 0)
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#endif
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{
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return errno;
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}
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else
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{
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return optval;
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}
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}
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int Socket::connect(const InetAddress &addr)
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{
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if (addr.is_ip_v6())
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{
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return ::connect(_socket, addr.get_sock_addr(), static_cast<socklen_t>(sizeof(struct sockaddr_in6)));
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}
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else
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{
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return ::connect(_socket, addr.get_sock_addr(), static_cast<socklen_t>(sizeof(struct sockaddr_in)));
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}
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}
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bool Socket::is_self_connect()
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{
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struct sockaddr_in6 localaddr = get_local_addr();
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struct sockaddr_in6 peeraddr = get_peer_addr();
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if (localaddr.sin6_family == AF_INET)
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{
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const struct sockaddr_in *laddr4 = reinterpret_cast<struct sockaddr_in *>(&localaddr);
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const struct sockaddr_in *raddr4 = reinterpret_cast<struct sockaddr_in *>(&peeraddr);
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return laddr4->sin_port == raddr4->sin_port && laddr4->sin_addr.s_addr == raddr4->sin_addr.s_addr;
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}
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else if (localaddr.sin6_family == AF_INET6)
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{
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return localaddr.sin6_port == peeraddr.sin6_port && memcmp(&localaddr.sin6_addr, &peeraddr.sin6_addr, sizeof localaddr.sin6_addr) == 0;
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}
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else
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{
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return false;
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}
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}
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void Socket::bind_address(const InetAddress &address)
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{
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ERR_FAIL_COND(_socket == 0);
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int ret;
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if (address.is_ip_v6())
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{
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ret = ::bind(_socket, address.get_sock_addr(), sizeof(sockaddr_in6));
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}
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else
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{
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ret = ::bind(_socket, address.get_sock_addr(), sizeof(sockaddr_in));
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}
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if (ret != 0)
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{
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LOG_ERR("Bind address failed:");
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LOG_ERR(address.to_ip_port());
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#ifdef _WIN32
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exit(WSAGetLastError());
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#else
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exit(errno);
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#endif
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}
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}
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void Socket::listen()
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{
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ERR_FAIL_COND(_socket == 0);
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int ret = ::listen(_socket, SOMAXCONN);
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if (ret < 0)
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{
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LOG_ERR("listen failed");
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exit(1);
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}
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}
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int Socket::accept(Socket *sock)
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{
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struct sockaddr_in6 addr6;
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memset(&addr6, 0, sizeof(addr6));
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socklen_t size = sizeof(addr6);
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#ifdef __linux__
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int connfd = ::accept4(_socket, (struct sockaddr *)&addr6, &size, SOCK_NONBLOCK | SOCK_CLOEXEC);
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#else
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int connfd = static_cast<int>(::accept(_socket, (struct sockaddr *)&addr6, &size));
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#endif
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if (connfd >= 0)
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{
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sock->_socket = connfd;
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sock->_address.set_sock_addr_inet6(addr6);
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#ifndef __linux__
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sock->set_non_block_and_close_on_exit();
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#endif
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}
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return connfd;
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}
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void Socket::close_write()
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{
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#ifndef _WIN32
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if (::shutdown(_socket, SHUT_WR) < 0)
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#else
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if (::shutdown(_socket, SD_SEND) < 0)
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#endif
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{
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LOG_ERR("sockets::shutdownwrite");
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}
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}
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int Socket::read(char *buffer, uint64_t len)
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{
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#ifndef _WIN32
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return ::read(_socket, buffer, len);
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#else
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return recv(_socket, buffer, static_cast<int>(len), 0);
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#endif
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}
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int Socket::send(const char *buffer, uint64_t len)
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{
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#ifndef _WIN32
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return write(_socket, buffer, len);
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#else
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errno = 0;
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return ::send(_socket, buffer, static_cast<int>(len), 0);
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#endif
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}
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void Socket::set_tcp_nodelay(bool on)
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{
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#ifdef _WIN32
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char optval = on ? 1 : 0;
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#else
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int optval = on ? 1 : 0;
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#endif
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::setsockopt(_socket, IPPROTO_TCP, TCP_NODELAY, &optval, static_cast<socklen_t>(sizeof optval));
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}
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void Socket::set_reuse_addr(bool on)
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{
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#ifdef _WIN32
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char optval = on ? 1 : 0;
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#else
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int optval = on ? 1 : 0;
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#endif
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::setsockopt(_socket, SOL_SOCKET, SO_REUSEADDR, &optval, static_cast<socklen_t>(sizeof optval));
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}
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void Socket::set_reuse_port(bool on)
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{
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#ifdef SO_REUSEPORT
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#ifdef _WIN32
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char optval = on ? 1 : 0;
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#else
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int optval = on ? 1 : 0;
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#endif
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int ret = ::setsockopt(_socket, SOL_SOCKET, SO_REUSEPORT, &optval, static_cast<socklen_t>(sizeof optval));
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if (ret < 0 && on)
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{
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LOG_ERR("SO_REUSEPORT failed.");
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}
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#else
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if (on)
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{
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LOG_ERR("SO_REUSEPORT is not supported.");
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}
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#endif
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}
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void Socket::set_keep_alive(bool on)
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{
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#ifdef _WIN32
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char optval = on ? 1 : 0;
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#else
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int optval = on ? 1 : 0;
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#endif
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::setsockopt(_socket, SOL_SOCKET, SO_KEEPALIVE, &optval, static_cast<socklen_t>(sizeof optval));
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}
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struct sockaddr_in6 Socket::get_local_addr()
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{
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struct sockaddr_in6 localaddr;
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memset(&localaddr, 0, sizeof(localaddr));
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socklen_t addrlen = static_cast<socklen_t>(sizeof localaddr);
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if (::getsockname(_socket, static_cast<struct sockaddr *>((void *)(&localaddr)), &addrlen) < 0)
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{
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LOG_ERR("sockets::getLocalAddr");
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}
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return localaddr;
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}
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struct sockaddr_in6 Socket::get_peer_addr()
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{
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struct sockaddr_in6 peeraddr;
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memset(&peeraddr, 0, sizeof(peeraddr));
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socklen_t addrlen = static_cast<socklen_t>(sizeof peeraddr);
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if (::getpeername(_socket, static_cast<struct sockaddr *>((void *)(&peeraddr)), &addrlen) < 0)
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{
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LOG_ERR("sockets::getPeerAddr");
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}
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return peeraddr;
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}
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int Socket::global_init()
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{
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#ifdef _WIN32
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int r;
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WSADATA wsa_data;
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r = WSAStartup(MAKEWORD(2, 2), &wsa_data);
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return r;
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#else
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return 0;
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#endif
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}
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Socket::Socket()
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{
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_socket = 0;
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}
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Socket::Socket(int socketFD, const InetAddress &address)
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{
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_socket = socketFD;
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_address = address;
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}
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Socket::~Socket()
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{
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if (_socket >= 0)
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{
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#ifndef _WIN32
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close(_socket);
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#else
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closesocket(_socket);
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#endif
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}
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}
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67
sfw/core/socket.h
Executable file
67
sfw/core/socket.h
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#ifndef SOCKET_H
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#define SOCKET_H
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//Based on:
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/**
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*
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* Socket.h
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* An Tao
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*
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* Public header file in trantor lib.
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*
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* Copyright 2018, An Tao. All rights reserved.
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* Use of this source code is governed by a BSD-style license
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* that can be found in the License file.
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*
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*
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*/
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#include "error_macros.h"
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#include <string.h>
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#ifndef _WIN32
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#include <unistd.h>
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#endif
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#include <fcntl.h>
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#include "inet_address.h"
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class Socket
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{
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public:
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void create_net_socket();
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void create(int family);
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void set_non_block_and_close_on_exit();
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int get_error();
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int connect(const InetAddress &address);
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bool is_self_connect();
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void bind_address(const InetAddress &address);
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void listen();
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int accept(Socket *sock);
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void close_write();
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int read(char *buffer, uint64_t len);
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int send(const char *buffer, uint64_t len);
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void set_tcp_nodelay(bool on);
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void set_reuse_addr(bool on);
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void set_reuse_port(bool on);
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void set_keep_alive(bool on);
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struct sockaddr_in6 get_local_addr();
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struct sockaddr_in6 get_peer_addr();
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static int global_init();
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Socket();
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Socket(int socketFD, const InetAddress &address);
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~Socket();
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int _socket;
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InetAddress _address;
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};
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#endif // SOCKET_H
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