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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* mkhsfls - build the .FLS firmware container accepted by the web
* interface of Herospeed and Longse RV1126 IP cameras
*/
#include <errno.h>
#include <getopt.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_ENTRIES 32
#define HDR_SIZE 0x18
#define HDR_STR_LEN 8
#define HDR_OFF_SENSOR 8
#define HDR_OFF_DATA_LEN 16
#define HDR_OFF_FILE_NUM 20
#define ENTRY_SIZE 0x100
#define ENTRY_NAME_LEN 128
#define ENTRY_OFF_LEN 128
#define ENTRY_OFF_OFFSET 132
#define ENTRY_OFF_MAGIC 140
#define ENTRY_MAGIC 0x12345
struct entry {
char *name;
uint8_t *data;
size_t len;
};
static void put_le32(uint8_t *buf, uint32_t val)
{
buf[0] = val & 0xff;
buf[1] = (val >> 8) & 0xff;
buf[2] = (val >> 16) & 0xff;
buf[3] = val >> 24;
}
static int entry_read(struct entry *entry, char *spec)
{
char *sep;
FILE *fp;
long len;
sep = strchr(spec, '=');
if (!sep || sep == spec || (size_t)(sep - spec) >= ENTRY_NAME_LEN) {
fprintf(stderr, "%s: expected <name>=<file>\n", spec);
return -1;
}
*sep = '\0';
entry->name = spec;
fp = fopen(sep + 1, "rb");
if (!fp) {
fprintf(stderr, "%s: %s\n", sep + 1, strerror(errno));
return -1;
}
if (fseek(fp, 0, SEEK_END) || (len = ftell(fp)) < 0 ||
fseek(fp, 0, SEEK_SET)) {
fprintf(stderr, "%s: cannot determine size\n", sep + 1);
fclose(fp);
return -1;
}
entry->len = len;
entry->data = malloc(len ? len : 1);
if (!entry->data || fread(entry->data, 1, len, fp) != (size_t)len) {
fprintf(stderr, "%s: read failed\n", sep + 1);
fclose(fp);
return -1;
}
fclose(fp);
return 0;
}
static int fls_write(const char *path, const char *ic, const char *sensor,
const struct entry *entries, int count)
{
size_t offset = HDR_SIZE + (size_t)count * ENTRY_SIZE;
size_t total;
uint8_t *buf;
uint8_t *ent;
FILE *fp;
int i;
total = offset;
for (i = 0; i < count; i++)
total += entries[i].len;
buf = calloc(1, total);
if (!buf)
return -1;
strncpy((char *)buf, ic, HDR_STR_LEN - 1);
strncpy((char *)buf + HDR_OFF_SENSOR, sensor, HDR_STR_LEN - 1);
put_le32(buf + HDR_OFF_DATA_LEN, total);
put_le32(buf + HDR_OFF_FILE_NUM, count);
for (i = 0; i < count; i++) {
ent = buf + HDR_SIZE + (size_t)i * ENTRY_SIZE;
strcpy((char *)ent, entries[i].name);
put_le32(ent + ENTRY_OFF_LEN, entries[i].len);
put_le32(ent + ENTRY_OFF_OFFSET, offset);
put_le32(ent + ENTRY_OFF_MAGIC, ENTRY_MAGIC);
memcpy(buf + offset, entries[i].data, entries[i].len);
offset += entries[i].len;
}
fp = fopen(path, "wb");
if (!fp) {
fprintf(stderr, "%s: %s\n", path, strerror(errno));
free(buf);
return -1;
}
if (fwrite(buf, 1, total, fp) != total || fclose(fp)) {
fprintf(stderr, "%s: write failed\n", path);
free(buf);
return -1;
}
free(buf);
return 0;
}
static void usage(const char *progname)
{
fprintf(stderr,
"Usage: %s -i <ic> -s <sensor> -o <output> "
"-e <name=file> [-e ...]\n"
"\n"
"Options:\n"
" -i <string> SoC name checked by the device, e.g. RV1126\n"
" -s <string> sensor name checked by the device, e.g. IMX415\n"
" -e <name=file> entry: boot, system, uboot, param, var, update,\n"
" userdata or an absolute path of a file to write\n"
" -o <file> output file\n"
" -h show this help\n",
progname);
}
int main(int argc, char *argv[])
{
struct entry entries[MAX_ENTRIES];
const char *out_path = NULL;
const char *sensor = NULL;
const char *ic = NULL;
int count = 0;
int opt;
while ((opt = getopt(argc, argv, "i:s:e:o:h")) != -1) {
switch (opt) {
case 'i':
ic = optarg;
break;
case 's':
sensor = optarg;
break;
case 'e':
if (count >= MAX_ENTRIES ||
entry_read(&entries[count], optarg))
return EXIT_FAILURE;
count++;
break;
case 'o':
out_path = optarg;
break;
default:
usage(argv[0]);
return opt == 'h' ? EXIT_SUCCESS : EXIT_FAILURE;
}
}
if (!ic || !sensor || !out_path || !count ||
strlen(ic) >= HDR_STR_LEN || strlen(sensor) >= HDR_STR_LEN) {
usage(argv[0]);
return EXIT_FAILURE;
}
return fls_write(out_path, ic, sensor, entries, count) ?
EXIT_FAILURE : EXIT_SUCCESS;
}
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