mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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Steffen Vogel
d56732312d
git-svn-id: https://zerberus.eonerc.rwth-aachen.de:8443/svn/s2ss/trunk@3 8ec27952-4edc-4aab-86aa-e87bb2611832
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/**
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* Message format
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014, Institute for Automation of Complex Power Systems, EONERC
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*/
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#ifndef _MSG_H_
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#define _MSG_H_
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#include <stdint.h>
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#include <stdio.h>
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#include "config.h"
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#include "node.h"
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/**
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* The structure of a message (OPAL-RT example format)
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*
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* This struct defines the format of a message.
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* Its declared as "packed" because it represents the "on wire" data.
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*/
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#if PROTOCOL != 0
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#error "Unknown protocol version!"
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#endif
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struct msg
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{
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/// Sender device ID
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uint16_t dev_id;
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/// Message ID
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uint32_t msg_id;
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/// Message length (data only)
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uint16_t msg_len;
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/// Message length (data only)
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double data[MAX_VALUES];
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} __attribute__((packed));
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/**
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* Print a raw UDP packge in human readable form
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*
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* @param fd The file descriptor
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* @param msg A pointer to the UDP message
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*/
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void msg_fprint(FILE *f, struct msg *m);
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/**
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* Craft message with random-walking values
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*
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* NOTE: random-walking behaviour is not reentrant!
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*
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* @param msg A pointer to a struct msg
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* @param dev_id The device id of the message
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*/
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void msg_random(struct msg *m, short dev_id);
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#endif /* _MSG_H_ */
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