static struct wpabuf * eap_tnc_process_fragment(struct eap_tnc_data *data,
struct eap_method_ret *ret,
u8 id, u8 flags,
u32 message_length,
const u8 *buf, size_t len)
{
/* Process a fragment that is not the last one of the message */
if (data->in_buf == NULL && !(flags & EAP_TNC_FLAGS_LENGTH_INCLUDED)) {
wpa_printf(MSG_DEBUG, "EAP-TNC: No Message Length field in a "
"fragmented packet");
ret->ignore = TRUE;
return NULL;
}
if (data->in_buf == NULL) {
/* First fragment of the message */
data->in_buf = wpabuf_alloc(message_length);
if (data->in_buf == NULL) {
wpa_printf(MSG_DEBUG, "EAP-TNC: No memory for "
"message");
ret->ignore = TRUE;
return NULL;
}
wpabuf_put_data(data->in_buf, buf, len);
wpa_printf(MSG_DEBUG, "EAP-TNC: Received %lu bytes in first "
"fragment, waiting for %lu bytes more",
(unsigned long) len,
(unsigned long) wpabuf_tailroom(data->in_buf));
}
return eap_tnc_build_frag_ack(id, EAP_CODE_RESPONSE);
}
static struct wpabuf * eap_tnc_buildReq(struct eap_sm *sm, void *priv, u8 id)
{
struct eap_tnc_data *data = priv;
switch (data->state) {
case START:
tncs_init_connection(data->tncs);
return eap_tnc_build_start(sm, data, id);
case CONTINUE:
if (data->out_buf == NULL) {
data->out_buf = eap_tnc_build(sm, data);
if (data->out_buf == NULL) {
wpa_printf(MSG_DEBUG, "EAP-TNC: Failed to "
"generate message");
return NULL;
}
data->out_used = 0;
}
return eap_tnc_build_msg(data, id);
case RECOMMENDATION:
if (data->out_buf == NULL) {
data->out_buf = eap_tnc_build_recommendation(sm, data);
if (data->out_buf == NULL) {
wpa_printf(MSG_DEBUG, "EAP-TNC: Failed to "
"generate recommendation message");
return NULL;
}
data->out_used = 0;
}
return eap_tnc_build_msg(data, id);
case WAIT_FRAG_ACK:
return eap_tnc_build_msg(data, id);
case FRAG_ACK:
return eap_tnc_build_frag_ack(id, EAP_CODE_REQUEST);
case DONE:
case FAIL:
return NULL;
}
return NULL;
}