TP-OA max length comparisons were incorrect because TP-OA's 7-bit coded octets transport eleven 8-bit chars which take 23 bytes in UTF-8. Increase address array accordingly and don't compare byte length to character limit, but to a proper limit. --- src/smsutil.c | 12 +++++++++--- src/smsutil.h | 6 +++++- 2 files changed, 14 insertions(+), 4 deletions(-) diff --git a/src/smsutil.c b/src/smsutil.c index be60ee9..213e50e 100644 --- a/src/smsutil.c +++ b/src/smsutil.c @@ -524,7 +524,8 @@ static gboolean encode_validity_period(const struct sms_validity_period *vp, gboolean sms_encode_address_field(const struct sms_address *in, gboolean sc, unsigned char *pdu, int *offset) { - size_t len = strlen(in->address); + const char *addr = (const char *)&in->address; + size_t len = strlen(addr); unsigned char addr_len = 0; unsigned char p[10]; @@ -546,7 +547,8 @@ gboolean sms_encode_address_field(const struct sms_address *in, gboolean sc, unsigned char *gsm; unsigned char *r; - if (len > 11) + /* TP-OA's 10 octets transport 11 8-bit chars */ + if (g_utf8_strlen(addr, strlen(addr)) > 11) return FALSE; gsm = convert_utf8_to_gsm(in->address, len, NULL, &written, 0); @@ -675,7 +677,11 @@ gboolean sms_decode_address_field(const unsigned char *pdu, int len, if (utf8 == NULL) return FALSE; - if (strlen(utf8) > 20) { + /* + * TP-OA's 10 octets transport 11 8-bit chars, + * 22 bytes+terminator in UTF-8. + */ + if (strlen(utf8) > 22) { g_free(utf8); return FALSE; } diff --git a/src/smsutil.h b/src/smsutil.h index b1001f8..d252810 100644 --- a/src/smsutil.h +++ b/src/smsutil.h @@ -220,7 +220,11 @@ enum cbs_geo_scope { struct sms_address { enum sms_number_type number_type; enum sms_numbering_plan numbering_plan; - char address[21]; /* Max 20 in semi-octet, 11 in alnum */ + /* + * An alphanum TP-OA is 10 7-bit coded octets, which can carry + * 11 8-bit characters. 22 bytes + terminator in UTF-8. + */ + char address[23]; }; struct sms_scts { -- 1.7.9.5