static void ev_handler(struct mg_connection *nc, int ev, void *p) {
struct mg_mqtt_message *msg = (struct mg_mqtt_message *)p;
(void) nc;
#if 0
if (ev != NS_POLL)
printf("USER HANDLER GOT %d\n", ev);
#endif
switch (ev) {
case NS_CONNECT:
mg_set_protocol_mqtt(nc);
mg_send_mqtt_handshake(nc, "dummy");
break;
case NS_MQTT_CONNACK:
if (msg->connack_ret_code != NS_MQTT_CONNACK_ACCEPTED) {
printf("Got mqtt connection error: %d\n", msg->connack_ret_code);
exit(1);
}
printf("Subscribing to '/stuff'\n");
mg_mqtt_subscribe(nc, topic_expressions, sizeof(topic_expressions)/sizeof(*topic_expressions), 42);
break;
case NS_MQTT_PUBACK:
printf("Message publishing acknowledged (msg_id: %d)\n", msg->message_id);
break;
case NS_MQTT_SUBACK:
printf("Subscription acknowledged, forwarding to '/test'\n");
break;
case NS_MQTT_PUBLISH:
{
#if 0
char hex[1024] = {0};
mg_hexdump(nc->recv_mbuf.buf, msg->payload.len, hex, sizeof(hex));
printf("Got incoming message %s:\n%s", msg->topic, hex);
#else
printf("Got incoming message %s: %.*s\n", msg->topic, (int)msg->payload.len, msg->payload.p);
#endif
printf("Forwarding to /test\n");
mg_mqtt_publish(nc, "/test", 65, NS_MQTT_QOS(0), msg->payload.p, msg->payload.len);
}
break;
case NS_CLOSE:
printf("Connection closed\n");
exit(1);
}
}
static void mqtt_ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
struct mg_mqtt_message *msg = (struct mg_mqtt_message *) ev_data;
struct user_data *ud = (struct user_data *) nc->user_data;
struct v7 *v7 = ud->v7;
v7_val_t cb;
(void) nc;
(void) ev_data;
switch (ev) {
case MG_EV_CONNECT:
if (*(int *) ev_data == 0) {
mg_send_mqtt_handshake(nc, ud->client_id);
} else {
cb = v7_get(v7, ud->client, SJ_MQTT_ERROR_CB, ~0);
if (!v7_is_undefined(cb)) {
sj_invoke_cb0(v7, cb);
}
}
break;
case MG_EV_MQTT_CONNACK: {
/*
* Call connect or error cb if they were registered.
*/
const char *key;
if (msg->connack_ret_code == MG_EV_MQTT_CONNACK_ACCEPTED) {
key = SJ_MQTT_CONNECT_CB;
} else {
key = SJ_MQTT_ERROR_CB;
}
cb = v7_get(v7, ud->client, key, ~0);
if (!v7_is_undefined(cb)) {
sj_invoke_cb0(v7, cb);
}
break;
}
case MG_EV_MQTT_PUBLISH:
cb = v7_get(v7, ud->client, SJ_MQTT_MESSAGE_CB, ~0);
if (!v7_is_undefined(cb)) {
v7_val_t topic = v7_mk_string(v7, msg->topic, strlen(msg->topic), 1);
v7_val_t payload =
v7_mk_string(v7, msg->payload.p, msg->payload.len, 1);
sj_invoke_cb2(v7, cb, topic, payload);
}
break;
case MG_EV_CLOSE:
/*
* Invoke close cb and then destroys all mg state.
*/
cb = v7_get(v7, ud->client, SJ_MQTT_CLOSE_CB, ~0);
if (!v7_is_undefined(cb)) {
sj_invoke_cb0(v7, cb);
}
v7_def(v7, ud->client, "_nc", ~0, _V7_DESC_HIDDEN(1), V7_UNDEFINED);
v7_disown(v7, &ud->client);
free(ud->client_id);
free(ud);
break;
}
}
