diff options
Diffstat (limited to 'src/gsm/gsm23003.c')
| -rw-r--r-- | src/gsm/gsm23003.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/gsm/gsm23003.c b/src/gsm/gsm23003.c index 4fdad48a..1d9cefe6 100644 --- a/src/gsm/gsm23003.c +++ b/src/gsm/gsm23003.c @@ -31,6 +31,7 @@ #include <osmocom/gsm/gsm23003.h> #include <osmocom/gsm/protocol/gsm_23_003.h> +#include <osmocom/core/utils.h> static bool is_n_digits(const char *str, int min_digits, int max_digits) { @@ -71,6 +72,23 @@ bool osmo_msisdn_str_valid(const char *msisdn) return is_n_digits(msisdn, 1, 15); } +/*! Determine whether the given IMEI is valid according to 3GPP TS 23.003, + * Section 6.2.1. It consists of 14 digits, the 15th check digit is not + * intended for digital transmission. + * \param imei IMEI digits in ASCII string representation. + * \param with_15th_digit when true, expect the 15th digit to be present and + * verify it. + * \returns true when the IMEI is valid, false for invalid characters or number + * of digits. + */ +bool osmo_imei_str_valid(const char *imei, bool with_15th_digit) +{ + if (with_15th_digit) + return is_n_digits(imei, 15, 15) && osmo_luhn(imei, 14) == imei[14]; + else + return is_n_digits(imei, 14, 14); +} + /*! Return MCC string as standardized 3-digit with leading zeros. * \param[in] mcc MCC value. * \returns string in static buffer. |