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Add mg_mqtt_next_unsub

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cpq committed 2021-03-09 09:54:02 +00:00
1 parent ff9d0e462e
commit 829827d46f
2 files changed
+32 -10
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src/mqtt.c
+15 -4
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@@ -176,20 +176,31 @@ int mg_mqtt_parse(const uint8_t *buf, size_t len, struct mg_mqtt_message *m) {
return MQTT_OK;
}
int mg_mqtt_next_sub(struct mg_mqtt_message *msg, struct mg_str *topic,
uint8_t *qos, int pos) {
static int mg_mqtt_next_topic(struct mg_mqtt_message *msg, struct mg_str *topic,
uint8_t *qos, int pos) {
unsigned char *buf = (unsigned char *) msg->dgram.ptr + pos;
int new_pos;
if ((size_t) pos >= msg->dgram.len) return -1;
topic->len = buf[0] << 8 | buf[1];
topic->ptr = (char *) buf + 2;
new_pos = pos + 2 + topic->len + 1;
new_pos = pos + 2 + topic->len + (qos == NULL ? 0 : 1);
if ((size_t) new_pos > msg->dgram.len) return -1;
*qos = buf[2 + topic->len];
if (qos != NULL) *qos = buf[2 + topic->len];
return new_pos;
}
int mg_mqtt_next_sub(struct mg_mqtt_message *msg, struct mg_str *topic,
uint8_t *qos, int pos) {
uint8_t tmp;
return mg_mqtt_next_topic(msg, topic, qos == NULL ? &tmp : qos, pos);
}
int mg_mqtt_next_unsub(struct mg_mqtt_message *msg, struct mg_str *topic,
int pos) {
return mg_mqtt_next_topic(msg, topic, NULL, pos);
}
static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data,
void *fn_data) {
if (ev == MG_EV_READ) {