diff options
Diffstat (limited to 'src/tcp_socket.cpp')
| -rw-r--r-- | src/tcp_socket.cpp | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/src/tcp_socket.cpp b/src/tcp_socket.cpp new file mode 100644 index 0000000..cc426d7 --- /dev/null +++ b/src/tcp_socket.cpp @@ -0,0 +1,226 @@ +/* + Copyright (c) 2007-2010 iMatix Corporation + + This file is part of 0MQ. + + 0MQ is free software; you can redistribute it and/or modify it under + the terms of the Lesser GNU 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 + Lesser GNU General Public License for more details. + + You should have received a copy of the Lesser GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "tcp_socket.hpp" +#include "platform.hpp" +#include "err.hpp" + +#ifdef ZMQ_HAVE_WINDOWS + +zmq::tcp_socket_t::tcp_socket_t () : + s (retired_fd) +{ +} + +zmq::tcp_socket_t::~tcp_socket_t () +{ + if (s != retired_fd) + close (); +} + +int zmq::tcp_socket_t::open (fd_t fd_, uint64_t sndbuf_, uint64_t rcvbuf_) +{ + zmq_assert (s == retired_fd); + s = fd_; + + if (sndbuf_) { + int sz = (int) sndbuf_; + int rc = setsockopt (s, SOL_SOCKET, SO_SNDBUF, + (char*) &sz, sizeof (int)); + errno_assert (rc == 0); + } + + if (rcvbuf_) { + int sz = (int) rcvbuf_; + int rc = setsockopt (s, SOL_SOCKET, SO_RCVBUF, + (char*) &sz, sizeof (int)); + errno_assert (rc == 0); + } + + return 0; +} + +int zmq::tcp_socket_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::tcp_socket_t::get_fd () +{ + return s; +} + +int zmq::tcp_socket_t::write (const void *data, int size) +{ + int nbytes = send (s, (char*) data, size, 0); + + // If not a single byte can be written to the socket in non-blocking mode + // we'll get an error (this may happen during the speculative write). + if (nbytes == SOCKET_ERROR && WSAGetLastError () == WSAEWOULDBLOCK) + return 0; + + // Signalise peer failure. + if (nbytes == -1 && ( + WSAGetLastError () == WSAENETDOWN || + WSAGetLastError () == WSAENETRESET || + WSAGetLastError () == WSAEHOSTUNREACH || + WSAGetLastError () == WSAECONNABORTED || + WSAGetLastError () == WSAETIMEDOUT || + WSAGetLastError () == WSAECONNRESET)) + return -1; + + wsa_assert (nbytes != SOCKET_ERROR); + + return (size_t) nbytes; +} + +int zmq::tcp_socket_t::read (void *data, int size) +{ + int nbytes = recv (s, (char*) data, size, 0); + + // If not a single byte can be read from the socket in non-blocking mode + // we'll get an error (this may happen during the speculative read). + if (nbytes == SOCKET_ERROR && WSAGetLastError () == WSAEWOULDBLOCK) + return 0; + + // Connection failure. + if (nbytes == -1 && ( + WSAGetLastError () == WSAENETDOWN || + WSAGetLastError () == WSAENETRESET || + WSAGetLastError () == WSAECONNABORTED || + WSAGetLastError () == WSAETIMEDOUT || + WSAGetLastError () == WSAECONNRESET || + WSAGetLastError () == WSAECONNREFUSED || + WSAGetLastError () == WSAENOTCONN)) + return -1; + + wsa_assert (nbytes != SOCKET_ERROR); + + // Orderly shutdown by the other peer. + if (nbytes == 0) + return -1; + + return (size_t) nbytes; +} + +#else + +#include <unistd.h> +#include <sys/socket.h> +#include <arpa/inet.h> +#include <netinet/tcp.h> +#include <netinet/in.h> +#include <netdb.h> +#include <fcntl.h> + +zmq::tcp_socket_t::tcp_socket_t () : + s (retired_fd) +{ +} + +zmq::tcp_socket_t::~tcp_socket_t () +{ + if (s != retired_fd) + close (); +} + +int zmq::tcp_socket_t::open (fd_t fd_, uint64_t sndbuf_, uint64_t rcvbuf_) +{ + assert (s == retired_fd); + s = fd_; + + if (sndbuf_) { + int sz = (int) sndbuf_; + int rc = setsockopt (s, SOL_SOCKET, SO_SNDBUF, &sz, sizeof (int)); + errno_assert (rc == 0); + } + + if (rcvbuf_) { + int sz = (int) rcvbuf_; + int rc = setsockopt (s, SOL_SOCKET, SO_RCVBUF, &sz, sizeof (int)); + errno_assert (rc == 0); + } + + return 0; +} + +int zmq::tcp_socket_t::close () +{ + zmq_assert (s != retired_fd); + int rc = ::close (s); + if (rc != 0) + return -1; + s = retired_fd; + return 0; +} + +zmq::fd_t zmq::tcp_socket_t::get_fd () +{ + return s; +} + +int zmq::tcp_socket_t::write (const void *data, int size) +{ + ssize_t nbytes = send (s, data, size, 0); + + // Several errors are OK. When speculative write is being done we may not + // be able to write a single byte to the socket. Also, SIGSTOP issued + // by a debugging tool can result in EINTR error. + if (nbytes == -1 && (errno == EAGAIN || errno == EWOULDBLOCK || + errno == EINTR)) + return 0; + + // Signalise peer failure. + if (nbytes == -1 && (errno == ECONNRESET || errno == EPIPE)) + return -1; + + errno_assert (nbytes != -1); + return (size_t) nbytes; +} + +int zmq::tcp_socket_t::read (void *data, int size) +{ + ssize_t nbytes = recv (s, data, size, 0); + + // Several errors are OK. When speculative read is being done we may not + // be able to read a single byte to the socket. Also, SIGSTOP issued + // by a debugging tool can result in EINTR error. + if (nbytes == -1 && (errno == EAGAIN || errno == EWOULDBLOCK || + errno == EINTR)) + return 0; + + // Signalise peer failure. + if (nbytes == -1 && (errno == ECONNRESET || errno == ECONNREFUSED)) + return -1; + + errno_assert (nbytes != -1); + + // Orderly shutdown by the other peer. + if (nbytes == 0) + return -1; + + return (size_t) nbytes; +} + +#endif + |