From 5ac63140b01fed145fa41f613308e134420920ab Mon Sep 17 00:00:00 2001 From: Martin Sustrik Date: Thu, 28 Jul 2011 13:19:55 +0200 Subject: Implementations of TCP and IPC transports separated Signed-off-by: Martin Sustrik --- src/ipc_listener.cpp | 351 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 351 insertions(+) create mode 100644 src/ipc_listener.cpp (limited to 'src/ipc_listener.cpp') diff --git a/src/ipc_listener.cpp b/src/ipc_listener.cpp new file mode 100644 index 0000000..e11d522 --- /dev/null +++ b/src/ipc_listener.cpp @@ -0,0 +1,351 @@ +/* + Copyright (c) 2007-2011 iMatix Corporation + Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file + + This file is part of 0MQ. + + 0MQ is free software; you can redistribute it and/or modify it under + the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + 0MQ is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see . +*/ + +#include + +#include + +#include "ipc_listener.hpp" +#include "platform.hpp" +#include "tcp_engine.hpp" +#include "io_thread.hpp" +#include "session.hpp" +#include "config.hpp" +#include "err.hpp" + +#ifdef ZMQ_HAVE_WINDOWS +#include "windows.hpp" +#else +#include +#include +#include +#include +#include +#include +#include +#ifndef ZMQ_HAVE_OPENVMS +#include +#else +#include +#endif +#endif + +zmq::ipc_listener_t::ipc_listener_t (io_thread_t *io_thread_, + socket_base_t *socket_, const options_t &options_) : + own_t (io_thread_, options_), + io_object_t (io_thread_), + has_file (false), + s (retired_fd), + socket (socket_) +{ + memset (&addr, 0, sizeof (addr)); + addr_len = 0; +} + +zmq::ipc_listener_t::~ipc_listener_t () +{ + if (s != retired_fd) + close (); +} + +void zmq::ipc_listener_t::process_plug () +{ + // Start polling for incoming connections. + handle = add_fd (s); + set_pollin (handle); +} + +void zmq::ipc_listener_t::process_term (int linger_) +{ + rm_fd (handle); + own_t::process_term (linger_); +} + +void zmq::ipc_listener_t::in_event () +{ + fd_t fd = accept (); + + // If connection was reset by the peer in the meantime, just ignore it. + // TODO: Handle specific errors like ENFILE/EMFILE etc. + if (fd == retired_fd) + return; + + // Create the engine object for this connection. + tcp_engine_t *engine = new (std::nothrow) tcp_engine_t (fd, options); + alloc_assert (engine); + + // Choose I/O thread to run connecter in. Given that we are already + // running in an I/O thread, there must be at least one available. + io_thread_t *io_thread = choose_io_thread (options.affinity); + zmq_assert (io_thread); + + // Create and launch a session object. + session_t *session = new (std::nothrow) + session_t (io_thread, false, socket, options, NULL, NULL); + alloc_assert (session); + session->inc_seqnum (); + launch_child (session); + send_attach (session, engine, false); +} + +#ifdef ZMQ_HAVE_WINDOWS + +int zmq::ipc_listener_t::set_address (const char *protocol_, const char *addr_) +{ + // IPC protocol is not supported on Windows platform. + if (strcmp (protocol_, "tcp") != 0 ) { + errno = EPROTONOSUPPORT; + return -1; + } + + // Convert the interface into sockaddr_in structure. + int rc = resolve_ip_interface (&addr, &addr_len, addr_); + if (rc != 0) + return rc; + + // Create a listening socket. + s = ::socket (addr.ss_family, SOCK_STREAM, IPPROTO_TCP); + if (s == INVALID_SOCKET) { + wsa_error_to_errno (); + return -1; + } + + // Allow reusing of the address. + int flag = 1; + rc = setsockopt (s, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, + (const char*) &flag, sizeof (int)); + wsa_assert (rc != SOCKET_ERROR); + + // Bind the socket to the network interface and port. + rc = bind (s, (struct sockaddr*) &addr, addr_len); + if (rc == SOCKET_ERROR) { + wsa_error_to_errno (); + return -1; + } + + // Listen for incomming connections. + rc = listen (s, options.backlog); + if (rc == SOCKET_ERROR) { + wsa_error_to_errno (); + return -1; + } + + return 0; +} + +int zmq::ipc_listener_t::close () +{ + zmq_assert (s != retired_fd); + int rc = closesocket (s); + wsa_assert (rc != SOCKET_ERROR); + s = retired_fd; + return 0; +} + +zmq::fd_t zmq::ipc_listener_t::accept () +{ + zmq_assert (s != retired_fd); + + // Accept one incoming connection. + fd_t sock = ::accept (s, NULL, NULL); + if (sock == INVALID_SOCKET && + (WSAGetLastError () == WSAEWOULDBLOCK || + WSAGetLastError () == WSAECONNRESET)) + return retired_fd; + + zmq_assert (sock != INVALID_SOCKET); + + // Set to non-blocking mode. + unsigned long argp = 1; + int rc = ioctlsocket (sock, FIONBIO, &argp); + wsa_assert (rc != SOCKET_ERROR); + + return sock; +} + +#else + +int zmq::ipc_listener_t::set_address (const char *protocol_, const char *addr_) +{ + if (strcmp (protocol_, "tcp") == 0 ) { + + // Resolve the sockaddr to bind to. + int rc = resolve_ip_interface (&addr, &addr_len, addr_); + if (rc != 0) + return -1; + + // Create a listening socket. + s = ::socket (addr.ss_family, SOCK_STREAM, IPPROTO_TCP); + if (s == -1) + return -1; + + // Allow reusing of the address. + int flag = 1; + rc = setsockopt (s, SOL_SOCKET, SO_REUSEADDR, &flag, sizeof (int)); + errno_assert (rc == 0); + + // Bind the socket to the network interface and port. + rc = bind (s, (struct sockaddr*) &addr, addr_len); + if (rc != 0) { + int err = errno; + if (close () != 0) + return -1; + errno = err; + return -1; + } + + // Listen for incomming connections. + rc = listen (s, options.backlog); + if (rc != 0) { + int err = errno; + if (close () != 0) + return -1; + errno = err; + return -1; + } + + return 0; + } +#ifndef ZMQ_HAVE_OPENVMS + else if (strcmp (protocol_, "ipc") == 0) { + + // Get rid of the file associated with the UNIX domain socket that + // may have been left behind by the previous run of the application. + ::unlink (addr_); + + // Convert the address into sockaddr_un structure. + int rc = resolve_local_path (&addr, &addr_len, addr_); + if (rc != 0) + return -1; + + // Create a listening socket. + s = ::socket (AF_UNIX, SOCK_STREAM, 0); + if (s == -1) + return -1; + + // Set the non-blocking flag. + int flag = fcntl (s, F_GETFL, 0); + if (flag == -1) + flag = 0; + rc = fcntl (s, F_SETFL, flag | O_NONBLOCK); + errno_assert (rc != -1); + + // Bind the socket to the file path. + rc = bind (s, (struct sockaddr*) &addr, addr_len); + if (rc != 0) { + int err = errno; + if (close () != 0) + return -1; + errno = err; + return -1; + } + has_file = true; + + // Listen for incomming connections. + rc = listen (s, options.backlog); + if (rc != 0) { + int err = errno; + if (close () != 0) + return -1; + errno = err; + return -1; + } + + return 0; + } +#endif + else { + errno = EPROTONOSUPPORT; + return -1; + } +} + +int zmq::ipc_listener_t::close () +{ + zmq_assert (s != retired_fd); + int rc = ::close (s); + if (rc != 0) + return -1; + s = retired_fd; + +#ifndef ZMQ_HAVE_OPENVMS + // If there's an underlying UNIX domain socket, get rid of the file it + // is associated with. + struct sockaddr_un *su = (struct sockaddr_un*) &addr; + if (AF_UNIX == su->sun_family && has_file) { + rc = ::unlink(su->sun_path); + if (rc != 0) + return -1; + } +#endif + + return 0; +} + +zmq::fd_t zmq::ipc_listener_t::accept () +{ + zmq_assert (s != retired_fd); + + // Accept one incoming connection. + fd_t sock = ::accept (s, NULL, NULL); + +#if (defined ZMQ_HAVE_LINUX || defined ZMQ_HAVE_FREEBSD || \ + defined ZMQ_HAVE_OPENBSD || defined ZMQ_HAVE_OSX || \ + defined ZMQ_HAVE_OPENVMS || defined ZMQ_HAVE_NETBSD || \ + defined ZMQ_HAVE_CYGWIN) + if (sock == -1 && + (errno == EAGAIN || errno == EWOULDBLOCK || + errno == EINTR || errno == ECONNABORTED)) + return retired_fd; +#elif (defined ZMQ_HAVE_SOLARIS || defined ZMQ_HAVE_AIX) + if (sock == -1 && + (errno == EWOULDBLOCK || errno == EINTR || + errno == ECONNABORTED || errno == EPROTO)) + return retired_fd; +#elif defined ZMQ_HAVE_HPUX + if (sock == -1 && + (errno == EAGAIN || errno == EWOULDBLOCK || + errno == EINTR || errno == ECONNABORTED || errno == ENOBUFS)) + return retired_fd; +#elif defined ZMQ_HAVE_QNXNTO + if (sock == -1 && + (errno == EWOULDBLOCK || errno == EINTR || errno == ECONNABORTED)) + return retired_fd; +#endif + + errno_assert (sock != -1); + + // Set to non-blocking mode. +#ifdef ZMQ_HAVE_OPENVMS + int flags = 1; + int rc = ioctl (sock, FIONBIO, &flags); + errno_assert (rc != -1); +#else + int flags = fcntl (s, F_GETFL, 0); + if (flags == -1) + flags = 0; + int rc = fcntl (sock, F_SETFL, flags | O_NONBLOCK); + errno_assert (rc != -1); +#endif + + return sock; +} + +#endif -- cgit v1.2.3