mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
/** The socket node-type for Layer 2, 3, 4 BSD-style sockets
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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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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* 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 <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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/**
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* @addtogroup socket BSD Socket Node Type
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* @ingroup node
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* @{
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*/
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#pragma once
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#include <villas/node/config.h>
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#include <villas/node.h>
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#include <villas/socket_addr.h>
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#include <villas/io.h>
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/* Forward declarations */
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struct format_type;
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/** The maximum length of a packet which contains stuct msg. */
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#define SOCKET_INITIAL_BUFFER_LEN (64*1024)
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struct socket {
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int sd; /**< The socket descriptor */
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int verify_source; /**< Verify the source address of incoming packets against socket::remote. */
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enum SocketLayer layer; /**< The OSI / IP layer which should be used for this socket */
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struct format_type *format;
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struct io io;
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/* Multicast options */
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struct multicast {
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int enabled; /**< Is multicast enabled? */
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unsigned char loop; /** Loopback multicast packets to local host? */
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unsigned char ttl; /**< The time to live for multicast packets. */
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struct ip_mreq mreq; /**< A multicast group to join. */
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} multicast;
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struct {
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char *buf; /**< Buffer for receiving messages */
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size_t buflen;
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union sockaddr_union saddr; /**< Remote address of the socket */
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} in, out;
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};
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/** @see node_vtable::type_start */
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int socket_type_start(villas::node::SuperNode *sn);
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/** @see node_type::type_stop */
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int socket_type_stop();
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/** @see node_type::start */
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int socket_start(struct vnode *n);
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/** @see node_type::stop */
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int socket_stop(struct vnode *n);
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/** @see node_type::write */
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int socket_write(struct vnode *n, struct sample *smps[], unsigned cnt, unsigned *release);
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/** @see node_type::read */
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int socket_read(struct vnode *n, struct sample *smps[], unsigned cnt, unsigned *release);
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/** @see node_type::parse */
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int socket_parse(struct vnode *n, json_t *cfg);
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/** @see node_type::print */
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char * socket_print(struct vnode *n);
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/** @} */
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