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NMT: Add support for receiving 8-Bit-SMS, because it is mandatory

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Benefone Dragon uses this coding scheme for SMS-Submit.
This commit is contained in:
Andreas Eversberg
2017-11-11 08:11:50 +01:00
parent 486d2d5dbe
commit 8a74805ea6
2 changed files with 54 additions and 13 deletions
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28
src/nmt/sms.c
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@@ -360,8 +360,8 @@ static void sms_submit_report(nmt_t *nmt, uint8_t ref, int error)
* receive from lower layer
*/
/* decdoe message from 8 bit data */
static void decode_message(const uint8_t *data, int length, char *message)
/* decode 7-bit character message from 8 bit data */
static void decode_message_7(const uint8_t *data, int length, char *message)
{
int fill;
int i;
@@ -408,6 +408,7 @@ static int decode_sms_submit(nmt_t *nmt, const uint8_t *data, int length)
int orig_digits, dest_digits, msg_chars;
uint8_t orig_type, orig_plan, dest_type, dest_plan;
int tp_vpf_present = 0;
int coding = 0;
int rc;
/* decode ref */
@@ -515,7 +516,13 @@ static int decode_sms_submit(nmt_t *nmt, const uint8_t *data, int length)
PDEBUG(DSMS, DEBUG_NOTICE, "short data coding scheme IE\n");
return -FSC_ERROR_IN_MS;
}
if (data[0] != 0) {
if (data[0] == 0x00) {
PDEBUG(DSMS, DEBUG_DEBUG, "SMS coding is 7 bits (got 0x%02x)\n", data[0]);
coding = 7;
} else if ((data[0] & 0xf0) == 0x30) {
PDEBUG(DSMS, DEBUG_DEBUG, "SMS coding is 8 bits (got 0x%02x)\n", data[0]);
coding = 8;
} else {
PDEBUG(DSMS, DEBUG_NOTICE, "SMS coding unsupported (got 0x%02x)\n", data[0]);
return -FSC_ERROR_IN_MS;
}
@@ -539,14 +546,23 @@ static int decode_sms_submit(nmt_t *nmt, const uint8_t *data, int length)
}
msg_data = data + 1;
msg_chars = data[0];
msg_len = (msg_chars * 7 + 7) / 8;
if (coding == 7)
msg_len = (msg_chars * 7 + 7) / 8;
else
msg_len = msg_chars;
if (length < 1 + msg_len) {
PDEBUG(DSMS, DEBUG_NOTICE, "short read user data IE\n");
return -FSC_ERROR_IN_MS;
}
char message[msg_chars + 1];
decode_message(msg_data, msg_len, message);
PDEBUG(DSMS, DEBUG_DEBUG, "Decoded message: '%s'\n", message);
if (coding == 7) {
decode_message_7(msg_data, msg_len, message);
PDEBUG(DSMS, DEBUG_DEBUG, "Decoded message: '%s'\n", message);
} else {
memcpy(message, msg_data, msg_len);
message[msg_len] = '\0';
PDEBUG(DSMS, DEBUG_DEBUG, "Included message: '%s'\n", message);
}
PDEBUG(DSMS, DEBUG_INFO, "Submitting SMS to upper layer\n");