Merge commit 'e988fee1679536137b87d10e939eff5c1f27c8ab' as 'libs/libzmq'

libs/libzmq/src/pgm_socket.hpp

@@ -0,0 +1,128 @@
+/*
+    Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
+
+    This file is part of libzmq, the ZeroMQ core engine in C++.
+
+    libzmq is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    As a special exception, the Contributors give you permission to link
+    this library with independent modules to produce an executable,
+    regardless of the license terms of these independent modules, and to
+    copy and distribute the resulting executable under terms of your choice,
+    provided that you also meet, for each linked independent module, the
+    terms and conditions of the license of that module. An independent
+    module is a module which is not derived from or based on this library.
+    If you modify this library, you must extend this exception to your
+    version of the library.
+
+    libzmq 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 <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __PGM_SOCKET_HPP_INCLUDED__
+#define __PGM_SOCKET_HPP_INCLUDED__
+
+#if defined ZMQ_HAVE_OPENPGM
+
+#ifdef ZMQ_HAVE_WINDOWS
+#define __PGM_WININT_H__
+#endif
+
+#include <pgm/pgm.h>
+
+#if defined(ZMQ_HAVE_OSX) || defined(ZMQ_HAVE_NETBSD)
+#include <pgm/in.h>
+#endif
+
+#include "fd.hpp"
+#include "options.hpp"
+
+namespace zmq
+{
+//  Encapsulates PGM socket.
+class pgm_socket_t
+{
+  public:
+    //  If receiver_ is true PGM transport is not generating SPM packets.
+    pgm_socket_t (bool receiver_, const options_t &options_);
+
+    //  Closes the transport.
+    ~pgm_socket_t ();
+
+    //  Initialize PGM network structures (GSI, GSRs).
+    int init (bool udp_encapsulation_, const char *network_);
+
+    //  Resolve PGM socket address.
+    static int init_address (const char *network_,
+                             struct pgm_addrinfo_t **addr,
+                             uint16_t *port_number);
+
+    //   Get receiver fds and store them into user allocated memory.
+    void get_receiver_fds (fd_t *receive_fd_, fd_t *waiting_pipe_fd_);
+
+    //   Get sender and receiver fds and store it to user allocated
+    //   memory. Receive fd is used to process NAKs from peers.
+    void get_sender_fds (fd_t *send_fd_,
+                         fd_t *receive_fd_,
+                         fd_t *rdata_notify_fd_,
+                         fd_t *pending_notify_fd_);
+
+    //  Send data as one APDU, transmit window owned memory.
+    size_t send (unsigned char *data_, size_t data_len_);
+
+    //  Returns max tsdu size without fragmentation.
+    size_t get_max_tsdu_size ();
+
+    //  Receive data from pgm socket.
+    ssize_t receive (void **data_, const pgm_tsi_t **tsi_);
+
+    long get_rx_timeout ();
+    long get_tx_timeout ();
+
+    //  POLLIN on sender side should mean NAK or SPMR receiving.
+    //  process_upstream function is used to handle such a situation.
+    void process_upstream ();
+
+  private:
+    //  Compute size of the buffer based on rate and recovery interval.
+    int compute_sqns (int tpdu_);
+
+    //  OpenPGM transport.
+    pgm_sock_t *sock;
+
+    int last_rx_status, last_tx_status;
+
+    //  Associated socket options.
+    options_t options;
+
+    //  true when pgm_socket should create receiving side.
+    bool receiver;
+
+    //  Array of pgm_msgv_t structures to store received data
+    //  from the socket (pgm_transport_recvmsgv).
+    pgm_msgv_t *pgm_msgv;
+
+    //  Size of pgm_msgv array.
+    size_t pgm_msgv_len;
+
+    // How many bytes were read from pgm socket.
+    size_t nbytes_rec;
+
+    //  How many bytes were processed from last pgm socket read.
+    size_t nbytes_processed;
+
+    //  How many messages from pgm_msgv were already sent up.
+    size_t pgm_msgv_processed;
+};
+}
+#endif
+
+#endif