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add simple API support for app MQTT pub retries

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Sergio R. Caprile committed 2024-04-16 19:17:37 -03:00
1 parent 9fa840c1c7
commit 2bd188f3d6
5 files changed
+32 -15
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src/mqtt.c
+10 -4
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@@ -319,7 +319,8 @@ void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
}
}
void mg_mqtt_pub(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
uint16_t mg_mqtt_pub(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
uint16_t id = opts->retransmit_id;
uint8_t flags = (uint8_t) (((opts->qos & 3) << 1) | (opts->retain ? 1 : 0));
size_t len = 2 + opts->topic.len + opts->message.len;
MG_DEBUG(("%lu [%.*s] -> [%.*s]", c->id, (int) opts->topic.len,
@@ -328,17 +329,22 @@ void mg_mqtt_pub(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
if (opts->qos > 0) len += 2;
if (c->is_mqtt5) len += get_props_size(opts->props, opts->num_props);
if (opts->qos > 0 && id != 0) flags |= 1 << 3;
mg_mqtt_send_header(c, MQTT_CMD_PUBLISH, flags, (uint32_t) len);
mg_send_u16(c, mg_htons((uint16_t) opts->topic.len));
mg_send(c, opts->topic.buf, opts->topic.len);
if (opts->qos > 0) {
if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id;
mg_send_u16(c, mg_htons(c->mgr->mqtt_id));
if (opts->qos > 0) { // need to send 'id' field
if (id == 0) { // generate new one if not resending
if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id;
id = c->mgr->mqtt_id;
}
mg_send_u16(c, mg_htons(id));
}
if (c->is_mqtt5) mg_send_mqtt_properties(c, opts->props, opts->num_props);
if (opts->message.len > 0) mg_send(c, opts->message.buf, opts->message.len);
return id;
}
void mg_mqtt_sub(struct mg_connection *c, const struct mg_mqtt_opts *opts) {