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https://git.rwth-aachen.de/acs/public/villas/node/
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84 lines
2.8 KiB
C
84 lines
2.8 KiB
C
/** Node type: socket
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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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#pragma once
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <netinet/in.h>
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#include <villas/node/config.h>
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#if defined(LIBNL3_ROUTE_FOUND) && defined(__linux__)
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#define WITH_SOCKET_LAYER_ETH
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#include <linux/if_packet.h>
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#include <netinet/ether.h>
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#endif /* LIBNL3_ROUTE_FOUND */
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enum class SocketLayer {
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ETH,
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IP,
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UDP,
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UNIX
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};
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union sockaddr_union {
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struct sockaddr sa;
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struct sockaddr_storage ss;
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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struct sockaddr_un sun;
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#ifdef WITH_SOCKET_LAYER_ETH
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struct sockaddr_ll sll;
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#endif
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};
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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_address(const char *str, struct sockaddr *sa, enum SocketLayer layer, int flags);
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int socket_compare_addr(struct sockaddr *x, struct sockaddr *y);
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