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Keep CoAP 'observe' option length <= 3 bytes

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This commit is contained in:
Atis Elsts 2017-04-08 15:02:52 +01:00
parent d0ddb7221e
commit f83f035855
1 changed files with 4 additions and 0 deletions
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4
apps/er-coap/er-coap-observe.c
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@ -249,6 +249,8 @@ coap_notify_observers_sub(resource_t *resource, const char *subpath)
if(notification->code < BAD_REQUEST_4_00) { if(notification->code < BAD_REQUEST_4_00) {
coap_set_header_observe(notification, (obs->obs_counter)++); coap_set_header_observe(notification, (obs->obs_counter)++);
/* mask out to keep the CoAP observe option length <= 3 bytes */
obs->obs_counter &= 0xffffff;
} }
coap_set_token(notification, obs->token, obs->token_len); coap_set_token(notification, obs->token, obs->token_len);
@ -276,6 +278,8 @@ coap_observe_handler(resource_t *resource, void *request, void *response)
coap_req->uri_path, coap_req->uri_path_len); coap_req->uri_path, coap_req->uri_path_len);
if(obs) { if(obs) {
coap_set_header_observe(coap_res, (obs->obs_counter)++); coap_set_header_observe(coap_res, (obs->obs_counter)++);
/* mask out to keep the CoAP observe option length <= 3 bytes */
obs->obs_counter &= 0xffffff;
/* /*
* Following payload is for demonstration purposes only. * Following payload is for demonstration purposes only.
* A subscription should return the same representation as a normal GET. * A subscription should return the same representation as a normal GET.