/*
* Based on the declared type enum, validate that the value string complies
* with that format
*/
static int _env_flags_validate_type(const char *value,
enum env_flags_vartype type)
{
const char *end;
#ifdef CONFIG_CMD_NET
const char *cur;
int i;
#endif
switch (type) {
case env_flags_vartype_string:
break;
case env_flags_vartype_decimal:
skip_num(0, value, &end, -1);
if (*end != '\0')
return -1;
break;
case env_flags_vartype_hex:
skip_num(1, value, &end, -1);
if (*end != '\0')
return -1;
if (value + 2 == end && is_hex_prefix(value))
return -1;
break;
case env_flags_vartype_bool:
if (value[0] != '1' && value[0] != 'y' && value[0] != 't' &&
value[0] != 'Y' && value[0] != 'T' &&
value[0] != '0' && value[0] != 'n' && value[0] != 'f' &&
value[0] != 'N' && value[0] != 'F')
return -1;
if (value[1] != '\0')
return -1;
break;
#ifdef CONFIG_CMD_NET
case env_flags_vartype_ipaddr:
cur = value;
for (i = 0; i < 4; i++) {
skip_num(0, cur, &end, 3);
if (cur == end)
return -1;
if (i != 3 && *end != '.')
return -1;
if (i == 3 && *end != '\0')
return -1;
cur = end + 1;
}
break;
case env_flags_vartype_macaddr:
if (eth_validate_ethaddr_str(value))
return -1;
break;
#endif
case env_flags_vartype_end:
return -1;
}
/* OK */
return 0;
}
static void skip_num(int hex, const char *value, const char **end,
int max_digits)
{
int i;
if (hex && is_hex_prefix(value))
value += 2;
for (i = max_digits; i != 0; i--) {
if (hex && !isxdigit(*value))
break;
if (!hex && !isdigit(*value))
break;
value++;
}
if (end != NULL)
*end = value;
}
int eth_validate_ethaddr_str(const char *addr)
{
const char *end;
const char *cur;
int i;
cur = addr;
for (i = 0; i < 6; i++) {
skip_num(1, cur, &end, 2);
if (cur == end)
return -1;
if (cur + 2 == end && is_hex_prefix(cur))
return -1;
if (i != 5 && *end != ':')
return -1;
if (i == 5 && *end != '\0')
return -1;
cur = end + 1;
}
return 0;
}
