mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-23 00:00:01 +01:00
Steffen Vogel
bfb0221ccf
The new versions of those string concatenating functions are using realloc() to dynamically resize the string buffer if needed. We don't use the stack anymore.
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 2014-2015, 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[], struct settings *set);
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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 msg *pool, int poolsize, int first, int cnt);
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/** @see node_vtable::read */
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int socket_read(struct node *n, struct msg *pool, int poolsize, int first, int cnt);
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/** @see node_vtable::parse */
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int socket_parse(config_setting_t *cfg, struct node *n);
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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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