Using 'uint8_t' for the length argument is definitely a bad idea.
Because of this, packing more than 255 septets would not work as
expected. Deprecate the old function and use 'size_t' instead.
Change-Id: Ib1aac538afeb0a5c76a1df472d555139a496e12e
As can be seen, this unit test reveals problems with encoding
of more than 250 septets using gsm_7bit_encode_n(). The problem
is that some API functions use type 'uint8_t' for the length, so
we basically suffer from integer overflows.
Change-Id: I723300578d5ab0c7b94cf49c14d962b2dbf47740
The legacy 7bit conversion functions (those without the '_n_' in the
name) gave wrong return values on 64 bit platforms due to unproper
signed/unsigned conversions and the usage of SIZE_MAX.
This patch fixes this by using a smaller max size (see
GSM_7BIT_LEGACY_MAX_BUFFER_SIZE, currently set to 64k) for the legacy
wrappers and by using unsigned int for max_septets.
In addition, there are tests now that check the return values of
legacy encoding and decoding.
Sponsored-by: On-Waves ehf
The number of digits is the number of used octets times two (two
digits per octet). The result has been successfully dissected by
wireshark. It has not been tested with real phones.
The 7bit<->8bit encoding/decoding functions didn't check whether
there is still enough space in the destination buffer. Therefore a
buffer size parameter has been added to each of the functions which
is used to truncate the output if the buffer is too small.
In addition, the return value of the decoding functions has been
changed to number of characters written (excluding \0), so this
value is always equal to strlen(decoded).
The old functions are still available as wrapper functions.
The output of make check is looking like this now:
Regression tests.
1: bits ok
2: msgfile ok
3: sms ok
4: smscb ok
5: timer FAILED (testsuite.at:38)
6: ussd FAILED (testsuite.at:44)
Vadim Yanitskiy
Pau Espin
Jacob Erlbeck