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a410bb8fd5
These changes are arbitrarily divided into multiple commits to make it easier to find potentially introduced bugs with git bisect.
123 lines
3.4 KiB
C++
123 lines
3.4 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/IPv4Address.h>
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#include <AK/Types.h>
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#include <LibCore/Notifier.h>
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#include <LibCore/UDPServer.h>
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#include <LibCore/UDPSocket.h>
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#include <stdio.h>
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#include <unistd.h>
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#ifndef SOCK_NONBLOCK
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# include <sys/ioctl.h>
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#endif
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namespace Core {
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UDPServer::UDPServer(Object* parent)
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: Object(parent)
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{
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#ifdef SOCK_NONBLOCK
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m_fd = socket(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0);
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#else
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m_fd = socket(AF_INET, SOCK_DGRAM, 0);
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int option = 1;
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ioctl(m_fd, FIONBIO, &option);
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fcntl(m_fd, F_SETFD, FD_CLOEXEC);
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#endif
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ASSERT(m_fd >= 0);
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}
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UDPServer::~UDPServer()
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{
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::close(m_fd);
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}
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bool UDPServer::bind(const IPv4Address& address, u16 port)
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{
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if (m_bound)
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return false;
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auto saddr = SocketAddress(address, port);
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auto in = saddr.to_sockaddr_in();
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if (::bind(m_fd, (const sockaddr*)&in, sizeof(in)) != 0) {
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perror("UDPServer::bind");
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return false;
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}
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m_bound = true;
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m_notifier = Notifier::construct(m_fd, Notifier::Event::Read, this);
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m_notifier->on_ready_to_read = [this] {
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if (on_ready_to_receive)
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on_ready_to_receive();
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};
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return true;
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}
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ByteBuffer UDPServer::receive(size_t size, sockaddr_in& in)
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{
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auto buf = ByteBuffer::create_uninitialized(size);
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socklen_t in_len = sizeof(in);
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ssize_t rlen = ::recvfrom(m_fd, buf.data(), size, 0, (sockaddr*)&in, &in_len);
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if (rlen < 0) {
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dbgln("recvfrom: {}", strerror(errno));
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return {};
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}
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buf.trim(rlen);
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return buf;
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}
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Optional<IPv4Address> UDPServer::local_address() const
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{
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if (m_fd == -1)
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return {};
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sockaddr_in address;
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socklen_t len = sizeof(address);
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if (getsockname(m_fd, (sockaddr*)&address, &len) != 0)
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return {};
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return IPv4Address(address.sin_addr.s_addr);
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}
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Optional<u16> UDPServer::local_port() const
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{
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if (m_fd == -1)
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return {};
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sockaddr_in address;
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socklen_t len = sizeof(address);
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if (getsockname(m_fd, (sockaddr*)&address, &len) != 0)
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return {};
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return ntohs(address.sin_port);
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}
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}
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