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wsc: Parse additional attributes for ProbeResponse

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Probe Response messages can contain additional attributes tucked away
into the WFA-Vendor specific attribute.  Parse these attributes while
making sure the order is as expected.
This commit is contained in:
Denis Kenzior 2015-07-23 16:43:30 -05:00
parent 2f5a62d85c
commit 86252a98cc
1 changed files with 55 additions and 0 deletions
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55
src/wsc.c
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@ -561,6 +561,36 @@ done:
return 0;
}
static bool wfa_extract_authorized_macs(struct wsc_wfa_ext_iter *iter,
void *data)
{
uint8_t *to = data;
unsigned int len = wsc_wfa_ext_iter_get_length(iter);
unsigned int mod;
if (!len || len > 30)
return false;
mod = len % 6;
if (mod)
return false;
memcpy(to, wsc_wfa_ext_iter_get_data(iter), len);
return true;
}
static bool wfa_extract_registrar_configuration_methods(
struct wsc_wfa_ext_iter *iter, void *data)
{
uint16_t *to = data;
if (wsc_wfa_ext_iter_get_length(iter) != 2)
return false;
*to = l_get_be16(wsc_wfa_ext_iter_get_data(iter));
return true;
}
int wsc_parse_probe_response(const unsigned char *pdu, unsigned int len,
struct wsc_probe_response *out)
{
@ -596,5 +626,30 @@ int wsc_parse_probe_response(const unsigned char *pdu, unsigned int len,
if (r < 0)
return r;
if (!wsc_wfa_ext_iter_next(&iter))
goto done;
if (wsc_wfa_ext_iter_get_type(&iter) ==
WSC_WFA_EXTENSION_AUTHORIZED_MACS) {
if (!wfa_extract_authorized_macs(&iter, &out->authorized_macs))
return -EBADMSG;
if (!wsc_wfa_ext_iter_next(&iter))
goto done;
}
if (wsc_wfa_ext_iter_get_type(&iter) ==
WSC_WFA_EXTENSION_REGISTRAR_CONFIGRATION_METHODS) {
if (!wfa_extract_registrar_configuration_methods(&iter,
&out->reg_config_methods))
return -EBADMSG;
if (!wsc_wfa_ext_iter_next(&iter))
goto done;
}
return -EINVAL;
done:
return 0;
}