int send__real_publish(struct mosquitto *mosq, uint16_t mid, const char *topic, uint32_t payloadlen, const void *payload, int qos, bool retain, bool dup)
{
struct mosquitto__packet *packet = NULL;
int packetlen;
int rc;
assert(mosq);
assert(topic);
packetlen = 2+strlen(topic) + payloadlen;
if(qos > 0) packetlen += 2; /* For message id */
packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
if(!packet) return MOSQ_ERR_NOMEM;
packet->mid = mid;
packet->command = PUBLISH | ((dup&0x1)<<3) | (qos<<1) | retain;
packet->remaining_length = packetlen;
rc = packet__alloc(packet);
if(rc){
mosquitto__free(packet);
return rc;
}
/* Variable header (topic string) */
packet__write_string(packet, topic, strlen(topic));
if(qos > 0){
packet__write_uint16(packet, mid);
}
/* Payload */
if(payloadlen){
packet__write_bytes(packet, payload, payloadlen);
}
return packet__queue(mosq, packet);
}
/* For PUBACK, PUBCOMP, PUBREC, and PUBREL */
int send__command_with_mid(struct mosquitto *mosq, uint8_t command, uint16_t mid, bool dup)
{
struct mosquitto__packet *packet = NULL;
int rc;
assert(mosq);
packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
if(!packet) return MOSQ_ERR_NOMEM;
packet->command = command;
if(dup){
packet->command |= 8;
}
packet->remaining_length = 2;
rc = packet__alloc(packet);
if(rc){
mosquitto__free(packet);
return rc;
}
packet->payload[packet->pos+0] = MOSQ_MSB(mid);
packet->payload[packet->pos+1] = MOSQ_LSB(mid);
return packet__queue(mosq, packet);
}
/* For DISCONNECT, PINGREQ and PINGRESP */
int send__simple_command(struct mosquitto *mosq, uint8_t command)
{
struct mosquitto__packet *packet = NULL;
int rc;
assert(mosq);
packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
if(!packet) return MOSQ_ERR_NOMEM;
packet->command = command;
packet->remaining_length = 0;
rc = packet__alloc(packet);
if(rc){
mosquitto__free(packet);
return rc;
}
return packet__queue(mosq, packet);
}
int send__suback(struct mosquitto *context, uint16_t mid, uint32_t payloadlen, const void *payload)
{
struct mosquitto__packet *packet = NULL;
int rc;
log__printf(NULL, MOSQ_LOG_DEBUG, "Sending SUBACK to %s", context->id);
packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
if(!packet) return MOSQ_ERR_NOMEM;
packet->command = SUBACK;
packet->remaining_length = 2+payloadlen;
rc = packet__alloc(packet);
if(rc){
mosquitto__free(packet);
return rc;
}
packet__write_uint16(packet, mid);
if(payloadlen){
packet__write_bytes(packet, payload, payloadlen);
}
return packet__queue(context, packet);
}
int send__connack(struct mosquitto_db *db, struct mosquitto *context, int ack, int reason_code, const mosquitto_property *properties)
{
struct mosquitto__packet *packet = NULL;
int rc;
mosquitto_property *connack_props = NULL;
int proplen, varbytes;
uint32_t remaining_length;
rc = mosquitto_property_copy_all(&connack_props, properties);
if(rc){
return rc;
}
if(context->id){
log__printf(NULL, MOSQ_LOG_DEBUG, "Sending CONNACK to %s (%d, %d)", context->id, ack, reason_code);
}else{
log__printf(NULL, MOSQ_LOG_DEBUG, "Sending CONNACK to %s (%d, %d)", context->address, ack, reason_code);
}
remaining_length = 2;
if(context->protocol == mosq_p_mqtt5){
if(reason_code < 128 && db->config->retain_available == false){
rc = mosquitto_property_add_byte(&connack_props, MQTT_PROP_RETAIN_AVAILABLE, 0);
if(rc){
mosquitto_property_free_all(&connack_props);
return rc;
}
}
if(db->config->max_packet_size > 0){
rc = mosquitto_property_add_int32(&connack_props, MQTT_PROP_MAXIMUM_PACKET_SIZE, db->config->max_packet_size);
if(rc){
mosquitto_property_free_all(&connack_props);
return rc;
}
}
proplen = property__get_length_all(connack_props);
varbytes = packet__varint_bytes(proplen);
remaining_length += proplen + varbytes;
}
if(packet__check_oversize(context, remaining_length)){
mosquitto_property_free_all(&connack_props);
mosquitto__free(packet);
return MOSQ_ERR_OVERSIZE_PACKET;
}
packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
if(!packet) return MOSQ_ERR_NOMEM;
packet->command = CMD_CONNACK;
packet->remaining_length = remaining_length;
rc = packet__alloc(packet);
if(rc){
mosquitto_property_free_all(&connack_props);
mosquitto__free(packet);
return rc;
}
packet__write_byte(packet, ack);
packet__write_byte(packet, reason_code);
if(context->protocol == mosq_p_mqtt5){
property__write_all(packet, connack_props, true);
}
mosquitto_property_free_all(&connack_props);
return packet__queue(context, packet);
}
int send__unsubscribe(struct mosquitto *mosq, int *mid, int topic_count, char *const *const topic, const mosquitto_property *properties)
{
/* FIXME - only deals with a single topic */
struct mosquitto__packet *packet = NULL;
uint32_t packetlen;
uint16_t local_mid;
int rc;
int proplen, varbytes;
int i;
assert(mosq);
assert(topic);
packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
if(!packet) return MOSQ_ERR_NOMEM;
packetlen = 2;
for(i=0; i<topic_count; i++){
packetlen += 2+strlen(topic[i]);
}
if(mosq->protocol == mosq_p_mqtt5){
proplen = property__get_length_all(properties);
varbytes = packet__varint_bytes(proplen);
packetlen += proplen + varbytes;
}
packet->command = CMD_UNSUBSCRIBE | (1<<1);
packet->remaining_length = packetlen;
rc = packet__alloc(packet);
if(rc){
mosquitto__free(packet);
return rc;
}
/* Variable header */
local_mid = mosquitto__mid_generate(mosq);
if(mid) *mid = (int)local_mid;
packet__write_uint16(packet, local_mid);
if(mosq->protocol == mosq_p_mqtt5){
/* We don't use User Property yet. */
property__write_all(packet, properties, true);
}
/* Payload */
for(i=0; i<topic_count; i++){
packet__write_string(packet, topic[i], strlen(topic[i]));
}
#ifdef WITH_BROKER
# ifdef WITH_BRIDGE
for(i=0; i<topic_count; i++){
log__printf(mosq, MOSQ_LOG_DEBUG, "Bridge %s sending UNSUBSCRIBE (Mid: %d, Topic: %s)", mosq->id, local_mid, topic[i]);
}
# endif
#else
for(i=0; i<topic_count; i++){
log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending UNSUBSCRIBE (Mid: %d, Topic: %s)", mosq->id, local_mid, topic[i]);
}
#endif
return packet__queue(mosq, packet);
}