172 lines
3.8 KiB
C++
172 lines
3.8 KiB
C++
#include "SocketUtil.h"
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#ifdef _WIN32
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# include <winsock2.h>
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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 <arpa/inet.h>
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# include <netdb.h>
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# include <unistd.h>
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#endif
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namespace Feather::Sockets
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{
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class TCPSocketHandle
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{
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public:
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TCPSocketHandle()
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{
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m_socket = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
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// Can't create IPv6 socket? Create an IPv4 one.
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if (!(m_ipv6 = IsValid()))
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m_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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}
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~TCPSocketHandle()
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{
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Close();
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}
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bool IsIPV6() const { return m_ipv6; }
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bool MarkReusable()
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{
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constexpr uint32_t one = 1;
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return setsockopt(m_socket, SOL_SOCKET, SO_REUSEADDR,
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reinterpret_cast<const char*>(&one),
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socklen_t(sizeof(one))) == 0;
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}
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bool MarkDualBind()
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{
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constexpr uint32_t zero = 0;
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return setsockopt(m_socket, IPPROTO_IPV6, IPV6_V6ONLY,
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reinterpret_cast<const char*>(&zero),
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sizeof(zero)) == 0;
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}
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bool Bind(uint16_t port)
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{
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sockaddr_in6 name_ipv6 = {};
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name_ipv6.sin6_family = AF_INET6;
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name_ipv6.sin6_port = ntohs(port);
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sockaddr_in name_ipv4 = {};
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name_ipv4.sin_family = AF_INET;
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name_ipv4.sin_port = ntohs(port);
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return m_ipv6
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? BindGeneric(name_ipv6)
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: BindGeneric(name_ipv4);
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}
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bool Listen()
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{
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return listen(m_socket, SOMAXCONN) == 0;
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}
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#ifdef _WIN32
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bool IsValid() const { return m_socket != INVALID_SOCKET; }
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bool MarkNonBlocking()
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{
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unsigned long one = 1;
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return ioctlsocket(m_socket, FIONBIO, &one) != SOCKET_ERROR;
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}
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bool Close()
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{
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return shutdown(m_socket, SD_BOTH) == 0 && closesocket(m_socket) == 0;
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}
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static bool InitSocketSystem()
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{
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WSADATA wsa_data;
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return WSAStartup(MAKEWORD(1, 1), &wsa_data) == 0;
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}
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static bool CloseSocketSystem()
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{
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return WSACleanup() == 0;
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}
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using SocketType = SOCKET;
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#else
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bool IsValid() const { return m_socket >= 0; }
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bool MarkNonBlocking()
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{
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return fcntl(fd, F_SETFL, O_NONBLOCK) != -1;
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}
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bool Close()
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{
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return shutdown(m_socket, SHUT_RDWR) == 0 && close(m_socket) == 0;
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}
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static bool InitSocketSystem()
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{
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return true;
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}
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static bool CloseSocketSystem()
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{
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return true;
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}
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using SocketType = int;
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#endif
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private:
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template <typename T>
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bool BindGeneric(const T& name)
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{
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return bind(m_socket, reinterpret_cast<const sockaddr*>(&name), sizeof(name)) == 0;
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}
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SocketType m_socket;
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bool m_ipv6;
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};
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TCPSocket::TCPSocket(uint16_t port)
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{
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auto socket = std::make_unique<TCPSocketHandle>();
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if (!socket->IsValid())
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return;
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if (!socket->MarkReusable())
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return;
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if (socket->IsIPV6() && !socket->MarkDualBind())
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return;
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if (!socket->Bind(port))
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return;
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if (socket->Listen())
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return;
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m_socket = std::move(socket);
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}
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TCPSocket::~TCPSocket()
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{
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}
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namespace
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{
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class SocketInitializer
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{
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public:
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SocketInitializer() { TCPSocketHandle::InitSocketSystem(); }
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~SocketInitializer() { TCPSocketHandle::CloseSocketSystem(); }
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};
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static SocketInitializer s_socketInitializer;
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}
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} |