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https://git.rwth-aachen.de/acs/public/villas/node/
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112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/** Node type: socket
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*
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* This file implements the socket subtype for nodes.
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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 2014-2016, Institute for Automation of Complex Power Systems, EONERC
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* This file is part of S2SS. All Rights Reserved. Proprietary and confidential.
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* Unauthorized copying of this file, via any medium is strictly prohibited.
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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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#ifndef _SOCKET_H_
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#define _SOCKET_H_
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#include <sys/socket.h>
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#include <linux/if_packet.h>
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#include "node.h"
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enum socket_layer {
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LAYER_ETH,
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LAYER_IP,
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LAYER_UDP
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};
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union sockaddr_union {
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struct sockaddr sa;
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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struct sockaddr_ll sll;
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};
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struct socket {
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/** The socket descriptor */
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int sd;
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/** Socket mark for netem, routing and filtering */
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int mark;
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/** The OSI / IP layer which should be used for this socket */
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enum socket_layer layer;
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/** Local address of the socket */
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union sockaddr_union local;
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/** Remote address of the socket */
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union sockaddr_union remote;
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/** libnl3: Network emulator queuing discipline */
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struct rtnl_qdisc *tc_qdisc;
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/** libnl3: Firewall mark classifier */
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struct rtnl_cls *tc_classifier;
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/* Linked list _per_interface_ */
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struct socket *next;
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};
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/** @see node_vtable::init */
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int socket_init(int argc, char *argv[], config_setting_t *cfg);
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/** @see node_vtable::deinit */
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int socket_deinit();
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/** @see node_vtable::open */
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int socket_open(struct node *n);
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/** @see node_vtable::close */
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int socket_close(struct node *n);
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/** @see node_vtable::write */
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int socket_write(struct node *n, struct pool *pool, int cnt);
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/** @see node_vtable::read */
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int socket_read(struct node *n, struct pool *pool, int cnt);
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/** @see node_vtable::parse */
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int socket_parse(struct node *n, config_setting_t *cfg);
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/** @see node_vtable::print */
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char * socket_print(struct node *n);
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/** Generate printable socket address depending on the address family
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*
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* A IPv4 address is formatted as dotted decimals followed by the port/protocol number
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* A link layer address is formatted in hexadecimals digits seperated by colons and the inferface name
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*
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* @param sa A pointer to the socket address.
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* @return The buffer containing the textual representation of the address. The caller is responsible to free() this buffer!
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*/
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char * socket_print_addr(struct sockaddr *saddr);
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/** Parse a socket address depending on the address family
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*
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* A IPv4 address has the follwing format: [hostname/ip]:[port/protocol]
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* A link layer address has the following format: [mac]%[interface]:[ethertype]
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*
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* @todo Add support for autodetection of address type
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*
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* @param str A string specifiying the socket address. See description for allowed formats.
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* @param sa A pointer to the resolved address
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* @param layer Specifies the address type in which the addr is given
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* @param flags Flags for getaddrinfo(2)
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* @retval 0 Success. Everything went well.
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* @retval <0 Error. Something went wrong.
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*/
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int socket_parse_addr(const char *str, struct sockaddr *sa, enum socket_layer layer, int flags);
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#endif /** _SOCKET_H_ @} */
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