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Merge pull request #178 from mrdeep1/tid-duplication

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Verify tid is not being re-used in a session
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obgm authored and GitHub committed 2018-05-18 15:58:11 +02:00
2 parents 2782082808 1365dea39a
commit 9f68329f70
1 file changed
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src/coap_session.c
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@@ -252,6 +252,14 @@ coap_session_delay_pdu(coap_session_t *session, coap_pdu_t *pdu,
node->session = NULL;
node->t = 0;
} else {
coap_queue_t *q = NULL;
/* Check that the same tid is not getting re-used in violation of RFC7252 */
LL_FOREACH(session->sendqueue, q) {
if (q->id == pdu->tid) {
coap_log(LOG_ERR, "** %s tid=%d: already in-use - dropped\n", coap_session_str(session), pdu->tid);
return COAP_INVALID_TID;
}
}
node = coap_new_node();
if (node == NULL)
return COAP_INVALID_TID;