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/*
* Hot Beverage Companion – desktop application utilities
*
* Copyright (C) 2018 Gediminas Jakutis
*
* 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; version 2.1
* of the License.
*
* 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
* 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 St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <gtk/gtk.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <endian.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "util.h"
#include "net.h"
#include "gtk.h"
struct child_data {
char **argv;
int fd;
char *buf;
};
static float digest_temp(const short int rawtemp);
static float digest_volt(const short int rawvolt);
static int find_settings_region(char *start, char *end, char *buf, size_t n);
static int flash(char *buf, size_t address, size_t size, char* port);
void reap_dead_children(int pid, int status, void *data);
/*
* raw data is in 0.1°K per 1. Subtract 2730 to get Celsius.
* Multiply by 0.1f (divide by 10) to get the correct scale.
*/
static float digest_temp(const short int rawtemp)
{
return (rawtemp - 2730) * 0.1f;
}
/*
* raw data is in 1/1024 parts of the max A0 input voltage
* on the D1 mini board, which is 3.2V
*/
static float digest_volt(const short int rawvolt)
{
return 3.2f / 1024.0f * rawvolt;
}
int refresh_data(int nd, struct tempmodule_state *state)
{
int ret;
char buf[dgsize];
ret = net_getlastdata(nd, buf);
if (ret == A_OK) {
memcpy(&state->sequence, buf + 2, sizeof(state->size));
state->temperature = digest_temp(state->temperature_raw);
state->voltage = digest_volt(state->voltage_raw);
}
return ret;
}
int write_settings(char *imagename, const struct configuration * const conf)
{
/* the largest flash size supported by ESP-8266 is 16MiB, so let's just use that. */
static const size_t flash_size = 16 * 1024 * 1024;
char pattern_a[4] = PADDING_START;
char pattern_b[4] = PADDING_END;
ssize_t buf_used;
ssize_t offset;
char *buf = NULL;
int fd;
int ret = ERROR;
fd = open(imagename, O_RDONLY);
if (fd < 0) {
goto fail;
}
buf = malloc(flash_size);
buf_used = read(fd, buf, flash_size);
close(fd);
if (buf_used < sizeof(struct configuration)) {
goto fail;
}
offset = find_settings_region(pattern_a, pattern_b, buf, buf_used);
if (offset == ERROR) {
goto fail;
};
memcpy(buf + offset, conf, sizeof(struct configuration));
/* make sure the block written is aligned on 4k boundry
* and is 4k of size.
*
* see:
* https://github.com/espressif/esptool/issues/306
*/
offset &= ~(0xfff);
ret = flash(buf + offset, offset, 4 * 1024, NULL);
fail:
free(buf);
return ret;
}
static int find_settings_region(char *start, char *end, char *buf, size_t n)
{
int ret = ERROR;
char *a;
if (!(a = memmem(buf, n, start, 4))) {
goto fail;
}
if ((a - buf + sizeof(struct configuration)) > n) {
goto fail;
}
if (memcmp(a + sizeof(struct configuration) - 4, end, 4)) {
goto fail;
}
ret = a - buf;
fail:
return ret;
}
static int flash(char *buf, size_t address, size_t size, char* port)
{
static const char esptool[] = "esptool.py";
static const char command[] = "write_flash";
struct child_data *cdata;
char tmpfn[] = "espXXXXXX"; /* temporary file name template */
char *fifn; /* flash image file name */
char textbuf[32];
char *argv[7] = {0};
int ret = ERROR;
pid_t pid;
int fd;
size_t i = 1;
fd = mkstemp(tmpfn);
write(fd, buf, size);
fifn = malloc(0x100);
memset(fifn, '\0', 0x100);
sprintf(textbuf, "/proc/self/fd/%d", fd);
if (readlink(textbuf, fifn, 0x100) == -1) {
exit(TMPFILE);
}
argv[0] = strdup(esptool);
if (port) {
argv[i++] = strdup("--port");
argv[i++] = strdup(port);
}
argv[i++] = strdup(command);
sprintf(textbuf, "%#.4lx", address);
argv[i++] = strdup(textbuf);
argv[i++] = strdup(fifn);
argv[i] = NULL;
cdata = malloc(sizeof(*cdata));
cdata->argv = argv;
cdata->fd = fd;
cdata->buf = fifn;
g_spawn_async_with_pipes(NULL, argv, NULL, G_SPAWN_SEARCH_PATH | G_SPAWN_LEAVE_DESCRIPTORS_OPEN | G_SPAWN_DO_NOT_REAP_CHILD, NULL, NULL, &pid, NULL, NULL, NULL, NULL);
g_child_watch_add(pid, reap_dead_children, cdata);
return ret;
}
void reap_dead_children(int pid, int status, void *data)
{
struct child_data *a;
a = data;
free(a->buf);
close(a->fd);
free(data);
g_spawn_close_pid(pid);
gtkui_dialog_done(status);
}
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