diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gsm/Makefile.am | 3 | ||||
| -rw-r--r-- | src/gsm/gsm23003.c | 65 | ||||
| -rw-r--r-- | src/gsm/libosmogsm.map | 3 |
3 files changed, 70 insertions, 1 deletions
diff --git a/src/gsm/Makefile.am b/src/gsm/Makefile.am index 08cd5e65..48b8b2cf 100644 --- a/src/gsm/Makefile.am +++ b/src/gsm/Makefile.am @@ -29,7 +29,8 @@ libgsmint_la_SOURCES = a5.c rxlev_stat.c tlv_parser.c comp128.c comp128v23.c \ auth_milenage.c milenage/aes-encblock.c gea.c \ milenage/aes-internal.c milenage/aes-internal-enc.c \ milenage/milenage.c gan.c ipa.c gsm0341.c apn.c \ - gsup.c gprs_gea.c gsm0503_conv.c oap.c gsm0808_utils.c + gsup.c gprs_gea.c gsm0503_conv.c oap.c gsm0808_utils.c \ + gsm23003.c libgsmint_la_LDFLAGS = -no-undefined libgsmint_la_LIBADD = $(top_builddir)/src/libosmocore.la diff --git a/src/gsm/gsm23003.c b/src/gsm/gsm23003.c new file mode 100644 index 00000000..004e20ff --- /dev/null +++ b/src/gsm/gsm23003.c @@ -0,0 +1,65 @@ +/*! \file gsm23003.c + * Utility function implementations related to 3GPP TS 23.003 */ +/* + * (C) 2017 sysmocom s.f.m.c. GmbH <info@sysmocom.de> + * All Rights Reserved + * + * Author: Neels Hofmeyr <nhofmeyr@sysmocom.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#include <ctype.h> + +#include <osmocom/gsm/gsm23003.h> +#include <osmocom/gsm/protocol/gsm_23_003.h> + +static bool is_n_digits(const char *str, int min_digits, int max_digits) +{ + int len; + /* Use unsigned char * to avoid a compiler warning of + * "error: array subscript has type 'char' [-Werror=char-subscripts]" */ + const unsigned char *pos = (const unsigned char *)str; + for (len = 0; *pos && len < max_digits; len++, pos++) + if (!isdigit(*pos)) + return false; + if (len < min_digits) + return false; + /* With not too many digits, we should have reached *str == nul */ + if (*pos) + return false; + return true; +} + +/*! Determine whether the given IMSI is valid according to 3GPP TS 23.003. + * \param imsi IMSI digits in ASCII string representation. + * \returns true when the IMSI is valid, false for invalid characters or number + * of digits. + */ +bool osmo_imsi_str_valid(const char *imsi) +{ + return is_n_digits(imsi, GSM23003_IMSI_MIN_DIGITS, GSM23003_IMSI_MAX_DIGITS); +} + +/*! Determine whether the given MSISDN is valid according to 3GPP TS 23.003. + * \param msisdn MSISDN digits in ASCII string representation. + * \returns true when the MSISDN is valid, false for invalid characters or number + * of digits. + */ +bool osmo_msisdn_str_valid(const char *msisdn) +{ + return is_n_digits(msisdn, 1, 15); +} diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map index 066f4107..95b2ca9f 100644 --- a/src/gsm/libosmogsm.map +++ b/src/gsm/libosmogsm.map @@ -418,5 +418,8 @@ osmo_gsup_message_type_names; osmo_oap_encode; osmo_oap_decode; +osmo_imsi_str_valid; +osmo_msisdn_str_valid; + local: *; }; |