diff options
| -rw-r--r-- | src/gsm/gsm48.c | 25 | ||||
| -rw-r--r-- | tests/gsm0408/gsm0408_test.c | 2 | ||||
| -rw-r--r-- | tests/gsm0408/gsm0408_test.ok | 26 |
3 files changed, 24 insertions, 29 deletions
diff --git a/src/gsm/gsm48.c b/src/gsm/gsm48.c index e684a3ca..4558dfb6 100644 --- a/src/gsm/gsm48.c +++ b/src/gsm/gsm48.c @@ -638,7 +638,8 @@ int gsm48_generate_mid_from_imsi(uint8_t *buf, const char *imsi) return gsm48_generate_mid(buf, imsi, GSM_MI_TYPE_IMSI); } -/*! Convert TS 04.08 Mobile Identity (10.5.1.4) to string +/*! Convert TS 04.08 Mobile Identity (10.5.1.4) to string. + * This function does not validate the Mobile Identity digits, i.e. digits > 9 are returned as 'A'-'F'. * \param[out] string Caller-provided buffer for output * \param[in] str_len Length of \a string in bytes * \param[in] mi Mobile Identity to be stringified @@ -650,7 +651,7 @@ int gsm48_generate_mid_from_imsi(uint8_t *buf, const char *imsi) int gsm48_mi_to_string(char *string, const int str_len, const uint8_t *mi, const int mi_len) { - int i; + int rc; uint8_t mi_type; char *str_cur = string; uint32_t tmsi; @@ -670,17 +671,15 @@ int gsm48_mi_to_string(char *string, const int str_len, const uint8_t *mi, case GSM_MI_TYPE_IMSI: case GSM_MI_TYPE_IMEI: case GSM_MI_TYPE_IMEISV: - *str_cur++ = osmo_bcd2char(mi[0] >> 4); - - for (i = 1; i < mi_len; i++) { - if (str_cur + 2 >= string + str_len) - return str_cur - string; - *str_cur++ = osmo_bcd2char(mi[i] & 0xf); - /* skip last nibble in last input byte when GSM_EVEN */ - if( (i != mi_len-1) || (mi[0] & GSM_MI_ODD)) - *str_cur++ = osmo_bcd2char(mi[i] >> 4); - } - break; + rc = osmo_bcd2str(string, str_len, mi, + 1, mi_len * 2 - ((mi[0] & GSM_MI_ODD) ? 0 : 1), true); + /* osmo_bcd2str() returns snprintf style strlen(), this returns bytes written. */ + if (rc < 0) + return 0; + else if (rc < str_len) + return rc + 1; + else + return strlen(string) + 1; default: break; } diff --git a/tests/gsm0408/gsm0408_test.c b/tests/gsm0408/gsm0408_test.c index 24f903a7..c786d389 100644 --- a/tests/gsm0408/gsm0408_test.c +++ b/tests/gsm0408/gsm0408_test.c @@ -393,7 +393,6 @@ static const struct test_mid_encode_decode_test test_mid_encode_decode_tests[] = .expect_mi_tlv_hex = "170449322453", .str_size = 4, .expect_str = "423", - .expect_rc = 3, /* exception: on truncation, gsm48_mi_to_string() returns strlen(), not bytes! */ }, { .mi_type = GSM_MI_TYPE_IMEI, @@ -421,7 +420,6 @@ static const struct test_mid_encode_decode_test test_mid_encode_decode_tests[] = .expect_mi_tlv_hex = "170a937856341290785634f2", .str_size = 16, .expect_str = "987654321098765", - .expect_rc = 15, /* exception: on truncation, gsm48_mi_to_string() returns strlen(), not bytes! */ }, { /* gsm48 treats TMSI as decimal string */ diff --git a/tests/gsm0408/gsm0408_test.ok b/tests/gsm0408/gsm0408_test.ok index 1dc42499..2db58de8 100644 --- a/tests/gsm0408/gsm0408_test.ok +++ b/tests/gsm0408/gsm0408_test.ok @@ -23,8 +23,7 @@ Testing Mobile Identity conversions -> MI-str="4234235" rc=8 - IMSI 4234235 -> MI-TLV-hex='170449322453' - -> MI-str="423" rc=3 - ERROR: resulting string is not explicitly nul terminated + -> MI-str="423" rc=4 - IMEI 123456789012345 -> MI-TLV-hex='17081a32547698103254' -> MI-str="123456789012345" rc=16 @@ -39,8 +38,7 @@ Testing Mobile Identity conversions -> MI-str="987654321098765432" rc=19 - IMEI-SV 987654321098765432 -> MI-TLV-hex='170a937856341290785634f2' - -> MI-str="987654321098765" rc=15 - ERROR: resulting string is not explicitly nul terminated + -> MI-str="987654321098765" rc=16 - TMSI 305419896 -> MI-TLV-hex='1705f412345678' -> MI-str="305419896" rc=9 @@ -66,14 +64,14 @@ Testing Mobile Identity conversions Decoding zero length Mobile Identities - MI type: IMSI - writing to zero-length string: - rc=1 - ERROR: Wrote to invalid memory! + rc=0 + nothing written - writing to 1-byte-length string: rc=1 - ERROR: Wrote unexpected string "1!!!!" + returned empty string - decode zero-length mi: - rc=2 - ERROR: expected empty string, got output string: "1" + rc=1 + returned empty string - MI type: TMSI - writing to zero-length string: rc=1 @@ -96,14 +94,14 @@ Decoding zero length Mobile Identities returned empty string - MI type: IMSI | GSM_MI_ODD - writing to zero-length string: - rc=1 - ERROR: Wrote to invalid memory! + rc=0 + nothing written - writing to 1-byte-length string: rc=1 - ERROR: Wrote unexpected string "1!!!!" + returned empty string - decode zero-length mi: - rc=2 - ERROR: expected empty string, got output string: "1" + rc=1 + returned empty string - MI type: TMSI | GSM_MI_ODD - writing to zero-length string: rc=1 |