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net: coap: Rework pending retransmission logic

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Introduce retransmission counter to the coap_pending structure. This
allows to simplify the retransmission logic and allows to keep track of
the number of remaining retranmissions.

Additionally, extend the `coap_pending_init()` function with `retries`
parameter, which allows to set the retransmission count individually for
each confirmable transaction.

Fixes #28117

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
This commit is contained in:
Robert Lubos 2021-01-18 13:13:26 +01:00 • committed by Anas Nashif
commit 538e19ee2e
6 changed files with 35 additions and 25 deletions
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7
subsys/net/lib/lwm2m/lwm2m_engine.c
View file

@ -961,7 +961,8 @@ int lwm2m_init_message(struct lwm2m_message *msg)
goto cleanup;
}
r = coap_pending_init(msg->pending, &msg->cpkt, &msg->ctx->remote_addr);
r = coap_pending_init(msg->pending, &msg->cpkt, &msg->ctx->remote_addr,
COAP_DEFAULT_MAX_RETRANSMIT);
if (r < 0) {
LOG_ERR("Unable to initialize a pending "
"retransmission (err:%d).", r);
@ -3996,7 +3997,9 @@ static int lwm2m_response_promote_to_con(struct lwm2m_message *msg)
return -ENOMEM;
}
ret = coap_pending_init(msg->pending, &msg->cpkt, &msg->ctx->remote_addr);
ret = coap_pending_init(msg->pending, &msg->cpkt,
&msg->ctx->remote_addr,
COAP_DEFAULT_MAX_RETRANSMIT);
if (ret < 0) {
LOG_ERR("Unable to initialize a pending "
"retransmission (err:%d).", ret);