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nanocoap_sock: support handling empty ACKs with separate response

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This commit is contained in:
Benjamin Valentin 2022-10-19 15:52:40 +02:00 committed by Benjamin Valentin
parent 0284aa5146
commit 084f0287a3
2 changed files with 18 additions and 1 deletions
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8
sys/include/net/coap.h
View File

@ -251,6 +251,14 @@ extern "C" {
#define CONFIG_COAP_RANDOM_FACTOR_1000 (1500)
#endif
/**
* @brief Timeout in milliseconds for a separate (deferred) response
* sent after an empty ACK.
*/
#ifndef CONFIG_COAP_SEPARATE_RESPONSE_TIMEOUT_MS
#define CONFIG_COAP_SEPARATE_RESPONSE_TIMEOUT_MS (10 * MS_PER_SEC)
#endif
/** @brief Maximum number of retransmissions for a confirmable request */
#ifndef CONFIG_COAP_MAX_RETRANSMIT
#define CONFIG_COAP_MAX_RETRANSMIT (4)

11
sys/net/application_layer/nanocoap/sock.c
View File

@ -224,8 +224,17 @@ ssize_t nanocoap_sock_request_cb(nanocoap_sock_t *sock, coap_pkt_t *pkt,
case COAP_TYPE_CON:
_send_ack(sock, pkt);
/* fall-through */
case COAP_TYPE_NON:
case COAP_TYPE_ACK:
if (cb && coap_get_code(pkt) == COAP_CODE_EMPTY) {
/* empty ACK, wait for separate response */
state = STATE_RESPONSE_RCVD;
deadline = _deadline_from_interval(CONFIG_COAP_SEPARATE_RESPONSE_TIMEOUT_MS
* US_PER_MS);
DEBUG("nanocoap: wait for separate response\n");
continue;
}
/* fall-through */
case COAP_TYPE_NON:
/* call user callback */
if (cb) {
res = cb(arg, pkt);