diff options
Diffstat (limited to 'src/gsm')
| -rw-r--r-- | src/gsm/gsm0480.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/src/gsm/gsm0480.c b/src/gsm/gsm0480.c index 0072812d..38082b32 100644 --- a/src/gsm/gsm0480.c +++ b/src/gsm/gsm0480.c @@ -557,6 +557,11 @@ static int parse_process_uss_data(const uint8_t *uss_req_data, uint16_t length, memcpy(req->ussd_text, uss_req_data + 2, num_chars); + /* Copy the data 'as is' */ + memcpy(req->ussd_data, uss_req_data + 2, num_chars); + req->ussd_data_len = num_chars; + req->ussd_data_dcs = 0x00; + return 1; } @@ -580,6 +585,17 @@ static int parse_process_uss_req(const uint8_t *uss_req_data, uint16_t length, /* Get DCS (Data Coding Scheme) */ dcs = uss_req_data[4]; + /* Get the amount of bytes */ + num_chars = uss_req_data[6]; + + /* Prevent a mobile-originated buffer-overrun! */ + if (num_chars > GSM0480_USSD_OCTET_STRING_LEN) + num_chars = GSM0480_USSD_OCTET_STRING_LEN; + + /* Copy the data 'as is' */ + memcpy(req->ussd_data, uss_req_data + 7, num_chars); + req->ussd_data_len = num_chars; + req->ussd_data_dcs = dcs; /** * According to GSM 04.08, 4.4.2 "ASN.1 data types": @@ -588,7 +604,7 @@ static int parse_process_uss_req(const uint8_t *uss_req_data, uint16_t length, */ if (dcs == 0x0F) { /* Calculate the amount of 7-bit characters */ - num_chars = (uss_req_data[6] * 8) / 7; + num_chars = (num_chars * 8) / 7; /* Prevent a mobile-originated buffer-overrun! */ if (num_chars > GSM0480_USSD_7BIT_STRING_LEN) @@ -599,15 +615,7 @@ static int parse_process_uss_req(const uint8_t *uss_req_data, uint16_t length, return 1; } else { - /* Get the amount of 8-bit characters */ - num_chars = uss_req_data[6]; - - /* Prevent a mobile-originated buffer-overrun! */ - if (num_chars > GSM0480_USSD_OCTET_STRING_LEN) - num_chars = GSM0480_USSD_OCTET_STRING_LEN; - memcpy(req->ussd_text, &(uss_req_data[7]), num_chars); - return 1; } |