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/*
* Ouroboros - Copyright (C) 2016 - 2017
*
* The Common Application Connection Establishment Phase
*
* Sander Vrijders <sander.vrijders@intec.ugent.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* 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 <ouroboros/config.h>
#include <ouroboros/cacep.h>
#include <ouroboros/dev.h>
#include <ouroboros/errno.h>
#include <stdlib.h>
#include <string.h>
#include "cacep.pb-c.h"
typedef Cacep cacep_t;
#define BUF_SIZE 2048
struct cacep {
int fd;
char * name;
uint64_t address;
};
struct cacep * cacep_create(int fd,
const char * name,
uint64_t address)
{
struct cacep * tmp;
tmp = malloc(sizeof(*tmp));
if (tmp == NULL)
return NULL;
tmp->fd = fd;
tmp->address = address;
tmp->name = strdup(name);
if (tmp->name == NULL) {
free(tmp);
return NULL;
}
return tmp;
}
int cacep_destroy(struct cacep * instance)
{
if (instance == NULL)
return 0;
free(instance->name);
free(instance);
return 0;
}
static struct cacep_info * read_msg(struct cacep * instance)
{
struct cacep_info * tmp;
uint8_t buf[BUF_SIZE];
cacep_t * msg;
ssize_t len;
len = flow_read(instance->fd, buf, BUF_SIZE);
if (len < 0)
return NULL;
msg = cacep__unpack(NULL, len, buf);
if (msg == NULL)
return NULL;
tmp = malloc(sizeof(*tmp));
if (tmp == NULL) {
cacep__free_unpacked(msg, NULL);
return NULL;
}
tmp->addr = msg->address;
tmp->name = strdup(msg->name);
if (tmp->name == NULL) {
free(tmp);
cacep__free_unpacked(msg, NULL);
return NULL;
}
cacep__free_unpacked(msg, NULL);
return tmp;
}
static int send_msg(struct cacep * instance)
{
cacep_t msg = CACEP__INIT;
int ret = 0;
uint8_t * data = NULL;
size_t len = 0;
msg.name = instance->name;
msg.address = instance->address;
len = cacep__get_packed_size(&msg);
if (len == 0)
return -1;
data = malloc(len);
if (data == NULL)
return -ENOMEM;
cacep__pack(&msg, data);
if (flow_write(instance->fd, data, len) < 0)
ret = -1;
free(data);
return ret;
}
struct cacep_info * cacep_auth(struct cacep * instance)
{
struct cacep_info * tmp;
if (instance == NULL)
return NULL;
if (send_msg(instance))
return NULL;
tmp = read_msg(instance);
if (tmp == NULL)
return NULL;
return tmp;
}
struct cacep_info * cacep_auth_wait(struct cacep * instance)
{
struct cacep_info * tmp;
if (instance == NULL)
return NULL;
tmp = read_msg(instance);
if (tmp == NULL)
return NULL;
if (send_msg(instance)) {
free(tmp->name);
free(tmp);
return NULL;
}
return tmp;
}
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