mirror of https://github.com/nostar/urfd.git
- Replace TCP sockets with NNG pair protocol - Support IPC connections via file paths - Add thread-safe packet queues - Fix YSFProtocol header signature mismatchpull/23/head
Dave Behnke
1 month ago
parent
5e93e4917c
commit
3c319ec93d
@ -1,537 +1,249 @@
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// urfd -- The universal reflector
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// Copyright © 2024 Thomas A. Early N7TAE
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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#include <iostream>
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#include <unistd.h>
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#include <thread>
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#include <chrono>
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#include <csignal>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/select.h>
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#include <cstring>
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#include <sstream>
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#include "TCSocket.h"
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void CTCSocket::Close()
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CTCSocket::CTCSocket() : m_Running(false), m_Connected(false)
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{
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for (auto &item : m_Pfd)
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{
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if (item.fd >= 0)
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{
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Close(item.fd);
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}
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}
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m_Pfd.clear();
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m_Sock.id = 0;
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}
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void CTCSocket::Close(char mod)
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CTCSocket::~CTCSocket()
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{
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auto pos = m_Modules.find(mod);
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if (std::string::npos == pos)
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{
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std::cerr << "Could not find module '" << mod << "'" << std::endl;
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return;
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}
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if (m_Pfd[pos].fd < 0)
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{
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std::cerr << "Close(" << mod << ") is already closed" << std::endl;
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return;
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}
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Close(m_Pfd[pos].fd);
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m_Pfd[pos].fd = -1;
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Close();
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}
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void CTCSocket::Close(int fd)
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void CTCSocket::Close()
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{
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if (fd < 0)
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{
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return;
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}
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for (auto &p : m_Pfd)
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m_Running = false;
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if (m_Thread.joinable())
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m_Thread.join();
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if (m_Sock.id != 0)
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{
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if (fd == p.fd)
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{
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if (shutdown(p.fd, SHUT_RDWR))
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{
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perror("shutdown");
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}
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else
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{
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if (close(p.fd))
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{
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std::cerr << "Error while closing " << fd << ": ";
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perror("close");
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}
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else
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p.fd = -1;
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}
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return;
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}
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nng_close(m_Sock);
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m_Sock.id = 0;
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}
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std::cerr << "Could not find a file descriptor with a value of " << fd << std::endl;
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m_Connected = false;
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}
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int CTCSocket::GetFD(char module) const
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void CTCSocket::Close(char module)
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{
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auto pos = m_Modules.find(module);
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if (std::string::npos == pos)
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return -1;
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return m_Pfd[pos].fd;
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// In multiplexed mode, we cannot close a single module's connection independently
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// without closing the whole pipe. So this is a no-op or full close.
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// For now, no-op to allow other modules to survive transient errors.
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// std::cerr << "Close(" << module << ") ignored in NNG mode" << std::endl;
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}
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char CTCSocket::GetMod(int fd) const
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bool CTCSocket::Send(const STCPacket *packet)
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{
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for (unsigned i=0; i<m_Pfd.size(); i++)
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if (m_Sock.id == 0) return true;
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int rv = nng_send(m_Sock, (void*)packet, sizeof(STCPacket), 0);
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if (rv != 0)
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{
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if (fd == m_Pfd[i].fd)
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{
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return m_Modules[i];
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}
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// std::cerr << "NNG Send Error: " << nng_strerror(rv) << std::endl;
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return true;
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}
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return '?';
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return false;
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}
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bool CTCServer::AnyAreClosed() const
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bool CTCSocket::IsConnected(char module) const
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{
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for (auto &fds : m_Pfd)
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{
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if (0 > fds.fd)
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return true;
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}
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return false;
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return m_Connected;
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}
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bool CTCSocket::Send(const STCPacket *packet)
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int CTCSocket::GetFD(char module) const
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{
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auto pos = m_Modules.find(packet->module);
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if (pos == std::string::npos)
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// Legacy helper for checking connection state
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// CodecStream expects < 0 on failure
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return m_Connected ? 1 : -1;
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}
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void CTCSocket::Dispatcher()
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{
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while (m_Running)
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{
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if(packet->codec_in == ECodecType::ping)
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{
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pos = 0; // There is at least one transcoding module, use it to send the ping
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}
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else
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{
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std::cerr << "Can't Send() this packet to unconfigured module '" << packet->module << "'" << std::endl;
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return true;
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}
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}
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unsigned count = 0;
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auto data = (const unsigned char *)packet;
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do {
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auto n = send(m_Pfd[pos].fd, data+count, sizeof(STCPacket)-count, 0);
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if (n <= 0)
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STCPacket *buf = nullptr;
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size_t sz = 0;
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// 100ms timeout to check m_Running
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int rv = nng_recv(m_Sock, &buf, &sz, NNG_FLAG_ALLOC);
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if (rv == 0)
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{
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if (0 == n)
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if (sz == sizeof(STCPacket))
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{
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std::cerr << "CTCSocket::Send: socket on module '" << packet->module << "' has been closed!" << std::endl;
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STCPacket pkt;
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memcpy(&pkt, buf, sizeof(STCPacket));
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nng_free(buf, sz);
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if (m_ClientQueue)
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{
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// Client mode: everything goes to one queue
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m_ClientQueue->Push(pkt);
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}
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else
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{
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// Server mode: route by module
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auto it = m_Queues.find(pkt.module);
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if (it != m_Queues.end())
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{
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it->second->Push(pkt);
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}
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else
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{
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// Unknown module or not configured?
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// In urfd, we might want to auto-create logic or drop?
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// For now drop, as configured modules are set in Open
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}
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}
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}
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else
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{
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perror("CTCSocket::Send");
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nng_free(buf, sz);
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std::cerr << "Received packet of incorrect size: " << sz << std::endl;
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}
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Close(packet->module);
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return true;
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}
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count += n;
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} while (count < sizeof(STCPacket));
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return false;
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}
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bool CTCSocket::receive(int fd, STCPacket *packet)
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{
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auto n = recv(fd, packet, sizeof(STCPacket), MSG_WAITALL);
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if (n < 0)
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{
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perror("Receive recv");
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Close(fd);
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return true;
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}
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if (0 == n)
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{
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return true;
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else if (rv != NNG_ETIMEDOUT)
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{
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// Fatal error?
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// std::cerr << "NNG Recv Error: " << nng_strerror(rv) << std::endl;
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std::this_thread::sleep_for(std::chrono::milliseconds(100));
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}
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}
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if (n != sizeof(STCPacket))
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std::cout << "receive() only read " << n << " bytes of the transcoder packet from module '" << GetMod(fd) << "'" << std::endl;
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return false;
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}
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// returns true if there is data to return
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bool CTCServer::Receive(char module, STCPacket *packet, int ms)
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{
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bool rv = false;
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const auto pos = m_Modules.find(module);
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if (pos == std::string::npos)
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{
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std::cerr << "Can't receive on unconfigured module '" << module << "'" << std::endl;
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return rv;
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}
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// ---------------- SERVER ----------------
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auto pfds = &m_Pfd[pos];
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if (pfds->fd < 0)
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{
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std::this_thread::sleep_for(std::chrono::milliseconds(ms));
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return rv;
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}
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auto n = poll(pfds, 1, ms);
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if (n < 0)
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{
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perror("Recieve poll");
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Close(pfds->fd);
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return rv;
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}
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if (0 == n)
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return rv; // timeout
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if (pfds->revents & POLLIN)
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{
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rv = receive(pfds->fd, packet);
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}
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// It's possible that even if we read the data, the socket can have an error after the read...
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// So we'll check...
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if (pfds->revents & POLLERR || pfds->revents & POLLHUP)
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{
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if (pfds->revents & POLLERR)
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std::cerr << "POLLERR received on module '" << module << "', closing socket" << std::endl;
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if (pfds->revents & POLLHUP)
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std::cerr << "POLLHUP received on module '" << module << "', closing socket" << std::endl;
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Close(pfds->fd);
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}
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if (pfds->revents & POLLNVAL)
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{
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std::cerr << "POLLNVAL received on module " << module << "'" << std::endl;
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}
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if (rv)
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Close(pfds->fd);
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if(packet->codec_in == ECodecType::ping)
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return false;
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else
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return !rv;
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}
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// ---------------- SERVER ----------------
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bool CTCServer::Open(const std::string &address, const std::string &modules, uint16_t port)
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{
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m_Modules.assign(modules);
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m_Ip = CIp(address.c_str(), AF_UNSPEC, SOCK_STREAM, port);
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m_Pfd.resize(m_Modules.size());
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for (auto &pf : m_Pfd)
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m_Modules = modules;
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// Initialize queues for configured modules
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for (char c : m_Modules)
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{
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pf.fd = -1;
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pf.events = POLLIN;
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pf.revents = 0;
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m_Queues[c] = std::make_shared<CTCPacketQueue>();
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}
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return Accept();
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}
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bool CTCServer::Accept()
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{
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auto fd = socket(m_Ip.GetFamily(), SOCK_STREAM, 0);
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if (fd < 0)
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int rv;
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if ((rv = nng_pair1_open(&m_Sock)) != 0)
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{
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perror("Open socket");
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std::cerr << "nng_pair1_open failed: " << nng_strerror(rv) << std::endl;
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return true;
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}
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int yes = 1;
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auto rv = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
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if (rv < 0)
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{
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close(fd);
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perror("Open setsockopt");
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return true;
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}
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// Set receive timeout to 100ms for dispatcher loop
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nng_duration timeout = 100;
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nng_socket_set_ms(m_Sock, NNG_OPT_RECVTIMEO, timeout);
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rv = bind(fd, m_Ip.GetCPointer(), m_Ip.GetSize());
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if (rv < 0)
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{
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close(fd);
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perror("Open bind");
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return true;
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std::stringstream url;
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if (address.find("ipc://") == 0) {
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url << address;
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} else if (address.find("/") == 0 || address.find("./") == 0 || address.find("../") == 0) {
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url << "ipc://" << address;
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} else {
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url << "tcp://" << address << ":" << port;
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}
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rv = listen(fd, 3);
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if (rv < 0)
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if ((rv = nng_listen(m_Sock, url.str().c_str(), nullptr, 0)) != 0)
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{
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perror("Open listen");
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close(fd);
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Close();
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std::cerr << "nng_listen failed: " << nng_strerror(rv) << " URL: " << url.str() << std::endl;
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return true;
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}
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std::string wmod;
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for (const char c : m_Modules)
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{
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if (GetFD(c) < 0)
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wmod.append(1, c);
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}
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std::cout << "Checking " << m_Ip << " for transcoder connection";
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if (wmod.size() > 1)
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{
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std::cout << "s for modules ";
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}
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else
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{
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std::cout << " for module ";
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}
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std::cout << wmod << "..." << std::endl;
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struct pollfd pfd;
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pfd.fd = fd;
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pfd.events = POLLIN;
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while (AnyAreClosed())
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{
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auto p = poll(&pfd, 1, 100); // 100ms timeout
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if (p < 0)
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{
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perror("Accept poll");
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close(fd);
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Close();
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return true;
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}
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if (0 == p)
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break; // No more pending connections for now
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if (acceptone(fd))
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{
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close(fd);
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Close();
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return true;
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}
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}
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close(fd);
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m_Running = true;
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m_Connected = true;
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m_Thread = std::thread([this] { Dispatcher(); });
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return false;
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}
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bool CTCServer::acceptone(int fd)
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bool CTCServer::Receive(char module, STCPacket *packet, int ms)
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{
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CIp their_addr; // connector's address information
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auto it = m_Queues.find(module);
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if (it == m_Queues.end()) return false;
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socklen_t sin_size = sizeof(struct sockaddr_storage);
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auto newfd = accept(fd, their_addr.GetPointer(), &sin_size);
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if (newfd < 0)
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{
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perror("Accept accept");
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return true;
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}
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char mod;
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int rv = recv(newfd, &mod, 1, MSG_WAITALL); // block to get the identification byte
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if (rv != 1)
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{
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if (rv < 0)
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perror("Accept recv");
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else
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std::cerr << "recv got no identification byte!" << std::endl;
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close(newfd);
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return true;
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}
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const auto pos = m_Modules.find(mod);
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if (std::string::npos == pos)
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{
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std::cerr << "New connection for module '" << mod << "', but it's not configured!" << std::endl;
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std::cerr << "The transcoded modules need to be configured identically for both urfd and tcd." << std::endl;
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close(newfd);
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return true;
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}
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std::cout << "File descriptor " << newfd << " opened TCP port for module '" << mod << "' on " << their_addr << std::endl;
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m_Pfd[pos].fd = newfd;
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return false;
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return it->second->Pop(*packet, ms);
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}
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bool CTCClient::Open(const std::string &address, const std::string &modules, uint16_t port)
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bool CTCServer::AnyAreClosed() const
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{
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m_Address.assign(address);
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m_Modules.assign(modules);
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m_Port = port;
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m_Pfd.resize(m_Modules.size());
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for (auto &pf : m_Pfd)
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{
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pf.fd = -1;
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pf.events = POLLIN;
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}
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std::cout << "Connecting to the TCP server..." << std::endl;
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// If the dispatcher is running, we assume open.
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// NNG handles reconnections.
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return !m_Running;
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}
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for (char c : modules)
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{
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if (Connect(c))
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{
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return true;
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}
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}
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bool CTCServer::Accept()
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{
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// No manual accept needed with NNG
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return false;
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}
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bool CTCClient::Connect(char module)
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// ---------------- CLIENT ----------------
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bool CTCClient::Open(const std::string &address, const std::string &modules, uint16_t port)
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{
|
||||
const auto pos = m_Modules.find(module);
|
||||
if (pos == std::string::npos)
|
||||
{
|
||||
std::cerr << "CTCClient::Connect: could not find module '" << module << "' in configured modules!" << std::endl;
|
||||
return true;
|
||||
}
|
||||
CIp ip(m_Address.c_str(), AF_UNSPEC, SOCK_STREAM, m_Port);
|
||||
m_Modules = modules;
|
||||
m_ClientQueue = std::make_shared<CTCPacketQueue>();
|
||||
|
||||
auto fd = socket(ip.GetFamily(), SOCK_STREAM, 0);
|
||||
if (fd < 0)
|
||||
int rv;
|
||||
if ((rv = nng_pair1_open(&m_Sock)) != 0)
|
||||
{
|
||||
std::cerr << "Could not open socket for module '" << module << "'" << std::endl;
|
||||
perror("TC client socket");
|
||||
std::cerr << "nng_pair1_open failed: " << nng_strerror(rv) << std::endl;
|
||||
return true;
|
||||
}
|
||||
|
||||
int yes = 1;
|
||||
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)))
|
||||
{
|
||||
std::cerr << "Moudule " << module << " error:";
|
||||
perror("setsockopt");
|
||||
close(fd);
|
||||
return true;
|
||||
}
|
||||
// Set receive timeout for dispatcher
|
||||
nng_duration timeout = 100;
|
||||
nng_socket_set_ms(m_Sock, NNG_OPT_RECVTIMEO, timeout);
|
||||
|
||||
unsigned count = 0;
|
||||
while (connect(fd, ip.GetCPointer(), ip.GetSize()))
|
||||
{
|
||||
if (ECONNREFUSED == errno)
|
||||
{
|
||||
if (0 == ++count % 100) std::cout << "Connection refused! Restart the reflector." << std::endl;
|
||||
std::this_thread::sleep_for(std::chrono::milliseconds(100));
|
||||
}
|
||||
else
|
||||
{
|
||||
std::cerr << "Module " << module << " error: ";
|
||||
perror("connect");
|
||||
close(fd);
|
||||
return true;
|
||||
}
|
||||
std::stringstream url;
|
||||
if (address.find("ipc://") == 0) {
|
||||
url << address;
|
||||
} else if (address.find("/") == 0 || address.find("./") == 0 || address.find("../") == 0) {
|
||||
url << "ipc://" << address;
|
||||
} else {
|
||||
url << "tcp://" << address << ":" << port;
|
||||
}
|
||||
|
||||
int sent = send(fd, &module, 1, 0); // send the identification byte
|
||||
if (sent < 0)
|
||||
{
|
||||
std::cerr << "Error sending ID byte to module '" << module << "':" << std::endl;
|
||||
perror("send");
|
||||
close(fd);
|
||||
return true;
|
||||
}
|
||||
else if (0 == sent)
|
||||
// Client dials asynchronously so it can retry in background
|
||||
if ((rv = nng_dial(m_Sock, url.str().c_str(), nullptr, NNG_FLAG_NONBLOCK)) != 0)
|
||||
{
|
||||
std::cerr << "Could not set ID byte to module '" << module << "'" << std::endl;
|
||||
close(fd);
|
||||
std::cerr << "nng_dial failed: " << nng_strerror(rv) << " URL: " << url.str() << std::endl;
|
||||
return true;
|
||||
}
|
||||
|
||||
std::cout << "File descriptor " << fd << " on " << ip << " opened for module '" << module << "'" << std::endl;
|
||||
|
||||
m_Pfd[pos].fd = fd;
|
||||
m_Running = true;
|
||||
m_Connected = true;
|
||||
m_Thread = std::thread([this] { Dispatcher(); });
|
||||
|
||||
// Give it a moment to connect? Not strictly necessary.
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
void CTCClient::ReConnect() // and sometimes ping
|
||||
void CTCClient::Receive(std::queue<std::unique_ptr<STCPacket>> &queue, int ms)
|
||||
{
|
||||
static std::chrono::system_clock::time_point start = std::chrono::system_clock::now();
|
||||
auto now = std::chrono::system_clock::now();
|
||||
std::chrono::duration<double> secs = now - start;
|
||||
|
||||
for (char m : m_Modules)
|
||||
{
|
||||
if (0 > GetFD(m))
|
||||
{
|
||||
std::cout << "Reconnecting module " << m << "..." << std::endl;
|
||||
if (Connect(m))
|
||||
{
|
||||
raise(SIGINT);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if(secs.count() > 5.0)
|
||||
{
|
||||
STCPacket ping;
|
||||
ping.codec_in = ECodecType::ping;
|
||||
Send(&ping);
|
||||
start = now;
|
||||
}
|
||||
// Wait up to ms for the first packet
|
||||
STCPacket p;
|
||||
if (m_ClientQueue->Pop(p, ms))
|
||||
{
|
||||
queue.push(std::make_unique<STCPacket>(p));
|
||||
// Drain the rest without waiting
|
||||
while (m_ClientQueue->Pop(p, 0))
|
||||
{
|
||||
queue.push(std::make_unique<STCPacket>(p));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void CTCClient::Receive(std::queue<std::unique_ptr<STCPacket>> &queue, int ms)
|
||||
void CTCClient::ReConnect()
|
||||
{
|
||||
for (auto &pfd : m_Pfd)
|
||||
pfd.revents = 0;
|
||||
|
||||
auto rv = poll(m_Pfd.data(), m_Pfd.size(), ms);
|
||||
|
||||
if (rv < 0)
|
||||
{
|
||||
perror("Receive poll");
|
||||
return;
|
||||
}
|
||||
|
||||
if (0 == rv)
|
||||
return;
|
||||
|
||||
for (auto &pfd : m_Pfd)
|
||||
{
|
||||
if (pfd.fd < 0)
|
||||
continue;
|
||||
|
||||
if (pfd.revents & POLLIN)
|
||||
{
|
||||
auto p_tcpack = std::make_unique<STCPacket>();
|
||||
if (receive(pfd.fd, p_tcpack.get()))
|
||||
{
|
||||
p_tcpack.reset();
|
||||
Close(pfd.fd);
|
||||
}
|
||||
else
|
||||
{
|
||||
queue.push(std::move(p_tcpack));
|
||||
}
|
||||
}
|
||||
|
||||
if (pfd.revents & POLLERR || pfd.revents & POLLHUP)
|
||||
{
|
||||
std::cerr << "IO ERROR on Receive module " << GetMod(pfd.fd) << std::endl;
|
||||
Close(pfd.fd);
|
||||
}
|
||||
if (pfd.revents & POLLNVAL)
|
||||
{
|
||||
std::cerr << "POLLNVAL received on fd " << pfd.fd << ", resetting to -1" << std::endl;
|
||||
pfd.fd = -1;
|
||||
}
|
||||
}
|
||||
// NNG handles reconnection automatically
|
||||
}
|
||||
|
||||
Loading…
Reference in new issue