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gcoap: Separate out observe option generation in own function

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This commit is contained in:
Koen Zandberg 2023-11-10 16:01:10 +01:00
parent 6425fda812
commit a6a8f6e1cd
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GPG Key ID: BA1718B37D79F51C
1 changed files with 10 additions and 7 deletions
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17
sys/net/application_layer/gcoap/gcoap.c
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@ -1630,6 +1630,14 @@ ssize_t gcoap_req_send_tl(const uint8_t *buf, size_t len,
return ((res > 0 || res == -ENOTCONN) ? res : 0);
}
static void _add_generated_observe_option(coap_pkt_t *pdu)
{
/* generate initial notification value */
uint32_t now = ztimer_now(ZTIMER_MSEC);
pdu->observe_value = (now >> GCOAP_OBS_TICK_EXPONENT) & 0xFFFFFF;
coap_opt_add_uint(pdu, COAP_OPT_OBSERVE, pdu->observe_value);
}
int gcoap_resp_init(coap_pkt_t *pdu, uint8_t *buf, size_t len, unsigned code)
{
int header_len = coap_build_reply(pdu, code, buf, len, 0);
@ -1644,10 +1652,7 @@ int gcoap_resp_init(coap_pkt_t *pdu, uint8_t *buf, size_t len, unsigned code)
pdu->payload_len = len - header_len;
if (coap_get_observe(pdu) == COAP_OBS_REGISTER) {
/* generate initial notification value */
uint32_t now = ztimer_now(ZTIMER_MSEC);
pdu->observe_value = (now >> GCOAP_OBS_TICK_EXPONENT) & 0xFFFFFF;
coap_opt_add_uint(pdu, COAP_OPT_OBSERVE, pdu->observe_value);
_add_generated_observe_option(pdu);
}
return 0;
@ -1672,9 +1677,7 @@ int gcoap_obs_init(coap_pkt_t *pdu, uint8_t *buf, size_t len,
if (hdrlen > 0) {
coap_pkt_init(pdu, buf, len, hdrlen);
uint32_t now = ztimer_now(ZTIMER_MSEC);
pdu->observe_value = (now >> GCOAP_OBS_TICK_EXPONENT) & 0xFFFFFF;
coap_opt_add_uint(pdu, COAP_OPT_OBSERVE, pdu->observe_value);
_add_generated_observe_option(pdu);
return GCOAP_OBS_INIT_OK;
}