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ie: Add ie_rsnxe_capable

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Add convenience method for checking whether a given capability exists in
an RSN Extension element.
This commit is contained in:
Denis Kenzior 2021-07-08 15:34:52 -05:00
parent f22c958b79
commit 3f42e4df25
2 changed files with 27 additions and 0 deletions
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20
src/ie.c
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@ -2083,3 +2083,23 @@ int ie_build_hs20_indication(uint8_t version, uint8_t *to)
return 0;
}
bool ie_rsnxe_capable(const uint8_t *rsnxe, unsigned int bit)
{
unsigned int field_len;
if (!rsnxe)
return false;
if (rsnxe[1] == 0)
return false;
field_len = bit_field(rsnxe[2], 0, 4);
if (field_len + 1 != rsnxe[1])
return false;
if ((bit / 8) > field_len)
return false;
return test_bit(rsnxe + 2, bit);
}

7
src/ie.h
View File

@ -567,3 +567,10 @@ int ie_parse_hs20_indication_from_data(const uint8_t *data, size_t len,
uint8_t *version, uint16_t *pps_mo_id,
uint8_t *domain_id);
int ie_build_hs20_indication(uint8_t version, uint8_t *to);
enum ie_rsnx_capability {
IE_RSNX_PROTECTED_TWT = 4,
IE_RSNX_SAE_H2E = 5,
};
bool ie_rsnxe_capable(const uint8_t *rsnxe, unsigned int bit);