mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-09 00:00:00 +01:00
152 lines
No EOL
3.3 KiB
C
152 lines
No EOL
3.3 KiB
C
/** Message related functions.
|
|
*
|
|
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
|
|
* @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
|
|
* @license GNU General Public License (version 3)
|
|
*
|
|
* VILLASnode
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*********************************************************************************/
|
|
|
|
#include <arpa/inet.h>
|
|
#include <string.h>
|
|
|
|
#include "msg.h"
|
|
#include "msg_format.h"
|
|
#include "sample.h"
|
|
#include "utils.h"
|
|
|
|
void msg_ntoh(struct msg *m)
|
|
{
|
|
msg_hdr_ntoh(m);
|
|
|
|
for (int i = 0; i < m->length; i++)
|
|
m->data[i].i = ntohl(m->data[i].i);
|
|
}
|
|
|
|
void msg_hton(struct msg *m)
|
|
{
|
|
for (int i = 0; i < m->length; i++)
|
|
m->data[i].i = htonl(m->data[i].i);
|
|
|
|
msg_hdr_hton(m);
|
|
}
|
|
|
|
void msg_hdr_hton(struct msg *m)
|
|
{
|
|
m->length = htons(m->length);
|
|
m->sequence = htonl(m->sequence);
|
|
m->ts.sec = htonl(m->ts.sec);
|
|
m->ts.nsec = htonl(m->ts.nsec);
|
|
}
|
|
|
|
void msg_hdr_ntoh(struct msg *m)
|
|
{
|
|
m->length = ntohs(m->length);
|
|
m->sequence = ntohl(m->sequence);
|
|
m->ts.sec = ntohl(m->ts.sec);
|
|
m->ts.nsec = ntohl(m->ts.nsec);
|
|
}
|
|
|
|
int msg_verify(struct msg *m)
|
|
{
|
|
if (m->version != MSG_VERSION)
|
|
return -1;
|
|
else if (m->type != MSG_TYPE_DATA)
|
|
return -2;
|
|
else if ((m->rsvd1 != 0) || (m->rsvd2 != 0))
|
|
return -3;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
int msg_to_sample(struct msg *msg, struct sample *smp)
|
|
{
|
|
int ret;
|
|
|
|
msg_ntoh(msg);
|
|
|
|
ret = msg_verify(msg);
|
|
if (ret)
|
|
return -1;
|
|
|
|
smp->length = MIN(msg->length, smp->capacity);
|
|
smp->sequence = msg->sequence;
|
|
smp->ts.origin = MSG_TS(msg);
|
|
smp->ts.received.tv_sec = -1;
|
|
smp->ts.received.tv_nsec = -1;
|
|
|
|
memcpy(smp->data, msg->data, SAMPLE_DATA_LEN(smp->length));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int msg_from_sample(struct msg *msg, struct sample *smp)
|
|
{
|
|
*msg = MSG_INIT(smp->length, smp->sequence);
|
|
|
|
msg->ts.sec = smp->ts.origin.tv_sec;
|
|
msg->ts.nsec = smp->ts.origin.tv_nsec;
|
|
|
|
memcpy(msg->data, smp->data, MSG_DATA_LEN(smp->length));
|
|
|
|
msg_hton(msg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
ssize_t msg_buffer_from_samples(struct sample *smps[], unsigned cnt, char *buf, size_t len)
|
|
{
|
|
int ret, i = 0;
|
|
char *ptr = buf;
|
|
|
|
struct msg *msg = (struct msg *) ptr;
|
|
struct sample *smp = smps[i];
|
|
|
|
while (ptr < buf + len && i < cnt) {
|
|
ret = msg_from_sample(msg, smp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ptr += MSG_LEN(smp->length);
|
|
|
|
msg = (struct msg *) ptr;
|
|
smp = smps[++i];
|
|
}
|
|
|
|
return ptr - buf;
|
|
}
|
|
|
|
int msg_buffer_to_samples(struct sample *smps[], unsigned cnt, char *buf, size_t len)
|
|
{
|
|
int ret, i = 0;
|
|
char *ptr = buf;
|
|
|
|
struct msg *msg = (struct msg *) ptr;
|
|
struct sample *smp = smps[i];
|
|
|
|
while (ptr < buf + len && i < cnt) {
|
|
ret = msg_to_sample(msg, smp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ptr += MSG_LEN(smp->length);
|
|
|
|
msg = (struct msg *) ptr;
|
|
smp = smps[++i];
|
|
}
|
|
|
|
return i;
|
|
} |