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coap_dtls.c: Discard DTLS session on fatal error

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When a fatal error is detected for an ongoing DTLS session, any
retransmission is stopped and the session object is released.
This commit is contained in:
Olaf Bergmann committed 2016-04-08 15:14:20 +02:00
1 parent 4b9b38cdc9
commit 5ebd003a80
1 file changed
+24 -6
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src/coap_dtls.c
+24 -6
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@@ -155,6 +155,7 @@ dtls_event(struct dtls_context_t *dtls_context,
unsigned short code) {
coap_context_t *coap_context;
coap_dtls_session_t *session;
int event = (level == DTLS_ALERT_LEVEL_FATAL) ? COAP_EVENT_DTLS_ERROR : -1;
coap_context = (coap_context_t *)dtls_get_app_data(dtls_context);
assert(coap_context && coap_context->dtls_context);
@@ -172,25 +173,42 @@ dtls_event(struct dtls_context_t *dtls_context,
return -1;
}
/* Stop all transactions that are affected from a fatal error
* condition. */
if (level == DTLS_ALERT_LEVEL_FATAL) {
struct queue_t *item;
LL_FOREACH(session->sendqueue, item) {
coap_queue_t *node = NULL;
coap_remove_from_queue(&coap_context->sendqueue, item->id, &node);
coap_delete_node(node);
}
}
/* handle DTLS events */
switch (code) {
case DTLS_ALERT_CLOSE_NOTIFY: {
coap_handle_event(coap_context, COAP_EVENT_DTLS_CLOSED, session);
event = COAP_EVENT_DTLS_CLOSED;
break;
}
case DTLS_EVENT_CONNECTED: {
flush_data(coap_context->dtls_context, session);
coap_handle_event(coap_context, COAP_EVENT_DTLS_CONNECTED, session);
event = COAP_EVENT_DTLS_CONNECTED;
break;
}
case DTLS_EVENT_RENEGOTIATE: {
coap_handle_event(coap_context, COAP_EVENT_DTLS_RENEGOTIATE, session);
event = COAP_EVENT_DTLS_RENEGOTIATE;
break;
}
default:
if (level == DTLS_ALERT_LEVEL_FATAL) {
coap_handle_event(coap_context, COAP_EVENT_DTLS_ERROR, session);
}
;
}
if (event != -1) {
coap_handle_event(coap_context, event, session);
}
if (level == DTLS_ALERT_LEVEL_FATAL) {
coap_dtls_free_session(coap_context->dtls_context, session);
}
return 0;