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/*
* Ouroboros - Copyright (C) 2016 - 2017
*
* Protocol Control Information for FRCT
*
* Dimitri Staessens <dimitri.staessens@ugent.be>
* Sander Vrijders <sander.vrijders@ugent.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <ouroboros/config.h>
#include <ouroboros/errno.h>
#include <ouroboros/rib.h>
#include "dt_const.h"
#include "frct_pci.h"
#include "ribconfig.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
struct {
struct dt_const dtc;
size_t head_size;
/* offsets */
size_t seqno_o;
} frct_pci_info;
int frct_pci_init(void)
{
/* read dt constants from the RIB */
if (rib_read(BOOT_PATH "/dt/const/cep_id_size",
&frct_pci_info.dtc.cep_id_size,
sizeof(frct_pci_info.dtc.cep_id_size)) < 0 ||
rib_read(BOOT_PATH "/dt/const/seqno_size",
&frct_pci_info.dtc.seqno_size,
sizeof(frct_pci_info.dtc.seqno_size)) < 0)
return -1;
frct_pci_info.seqno_o = frct_pci_info.dtc.cep_id_size;
frct_pci_info.head_size = frct_pci_info.seqno_o +
frct_pci_info.dtc.seqno_size;
return 0;
}
void frct_pci_fini(void) {
return;
}
int frct_pci_ser(struct shm_du_buff * sdb,
struct frct_pci * frct_pci)
{
uint8_t * head;
assert(sdb);
assert(frct_pci);
head = shm_du_buff_head_alloc(sdb, frct_pci_info.head_size);
if (head == NULL)
return -EPERM;
/* FIXME: Add check and operations for Big Endian machines */
memcpy(head, &frct_pci->dst_cep_id, frct_pci_info.dtc.cep_id_size);
memcpy(head + frct_pci_info.seqno_o, &frct_pci->seqno,
frct_pci_info.dtc.seqno_size);
return 0;
}
void frct_pci_des(struct shm_du_buff * sdb,
struct frct_pci * frct_pci)
{
uint8_t * head;
assert(sdb);
assert(frct_pci);
head = shm_du_buff_head(sdb);
/* FIXME: Add check and operations for Big Endian machines */
memcpy(&frct_pci->dst_cep_id, head, frct_pci_info.dtc.cep_id_size);
memcpy(&frct_pci->seqno, head + frct_pci_info.seqno_o,
frct_pci_info.dtc.seqno_size);
shm_du_buff_head_release(sdb, frct_pci_info.head_size);
}
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