eive-obsw/libcsp/src/csp_promisc.c
2020-12-20 13:31:44 +01:00

83 lines
2.2 KiB
C

/*
Cubesat Space Protocol - A small network-layer protocol designed for Cubesats
Copyright (C) 2012 Gomspace ApS (http://www.gomspace.com)
Copyright (C) 2012 AAUSAT3 Project (http://aausat3.space.aau.dk)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <csp/csp.h>
#include <csp/arch/csp_queue.h>
#ifdef CSP_USE_PROMISC
static csp_queue_handle_t csp_promisc_queue = NULL;
static int csp_promisc_enabled = 0;
int csp_promisc_enable(unsigned int buf_size) {
/* If queue already initialised */
if (csp_promisc_queue != NULL) {
csp_promisc_enabled = 1;
return CSP_ERR_NONE;
}
/* Create packet queue */
csp_promisc_queue = csp_queue_create(buf_size, sizeof(csp_packet_t *));
if (csp_promisc_queue == NULL)
return CSP_ERR_INVAL;
csp_promisc_enabled = 1;
return CSP_ERR_NONE;
}
void csp_promisc_disable(void) {
csp_promisc_enabled = 0;
}
csp_packet_t * csp_promisc_read(uint32_t timeout) {
if (csp_promisc_queue == NULL)
return NULL;
csp_packet_t * packet = NULL;
csp_queue_dequeue(csp_promisc_queue, &packet, timeout);
return packet;
}
void csp_promisc_add(csp_packet_t * packet) {
if (csp_promisc_enabled == 0)
return;
if (csp_promisc_queue != NULL) {
/* Make a copy of the message and queue it to the promiscuous task */
csp_packet_t *packet_copy = csp_buffer_clone(packet);
if (packet_copy != NULL) {
if (csp_queue_enqueue(csp_promisc_queue, &packet_copy, 0) != CSP_QUEUE_OK) {
csp_log_error("Promiscuous mode input queue full");
csp_buffer_free(packet_copy);
}
}
}
}
#endif