version 1.1.2.1, 2011/11/21 13:13:54
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version 1.1.2.3, 2011/11/21 14:51:23
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Line 3
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Line 3
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/* ------------------------------------------------------------------- */ |
/* ------------------------------------------------------------------- */ |
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/* |
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* mqtt_msgPUBLISH() Create PUBLISH message |
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* |
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* @buf = Message buffer |
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* @csTopic = Publish topic |
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* @msgID = MessageID >0, if QOS != MQTT_QOS_ONCE |
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* @Dup = Duplicate message |
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* @QOS = QoS |
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* return: -1 error or >-1 message size for send |
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*/ |
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int |
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mqtt_msgPUBLISH(mqtt_msg_t * __restrict buf, const char *csTopic, u_short msgID, |
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u_char Dup, u_char QOS) |
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{ |
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int siz = 0; |
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struct mqtthdr *hdr; |
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mqtthdr_var_t *topic; |
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mqtt_v_t *mid; |
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if (!buf || !csTopic) |
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return -1; |
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if (QOS > MQTT_QOS_EXACTLY) { |
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mqtt_SetErr(EINVAL, "Error:: invalid QoS parameter"); |
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return -1; |
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} |
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if (!msgID && QOS != MQTT_QOS_ONCE) { |
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mqtt_SetErr(EINVAL, "Error:: invalid MessageID parameter must be >0"); |
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return -1; |
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} |
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if (mqtt_msgRealloc(buf, MQTTMSG_MAX) == -1) |
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return -1; |
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else { |
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hdr = (struct mqtthdr *) (buf->msg_base + siz); |
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siz += sizeof(struct mqtthdr); |
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} |
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/* variable header */ |
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topic = (mqtthdr_var_t*) (buf->msg_base + siz); |
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topic->var_sb.val = htons(strlen(csTopic)); |
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memcpy(topic->var_data, csTopic, ntohs(topic->var_sb.val)); |
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siz += MQTTHDR_VAR_SIZEOF(topic); |
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mid = (mqtt_v_t*) (buf->msg_base + siz); |
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mid->val = htons(msgID); |
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siz += sizeof(mqtt_v_t); |
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/* fixed header */ |
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hdr->mqtt_msg.type = MQTT_TYPE_PUBLISH; |
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hdr->mqtt_msg.qos = QOS; |
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hdr->mqtt_msg.dup = Dup ? 1 : 0; |
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hdr->mqtt_msg.retain = 0; |
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*hdr->mqtt_len = mqtt_encodeLen(siz - sizeof(struct mqtthdr)); |
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mqtt_msgRealloc(buf, siz); |
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return siz; |
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} |
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static int |
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_mqtt_msgPUB_(mqtt_msg_t * __restrict buf, u_char cmd, u_short msgID) |
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{ |
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int siz = 0; |
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struct mqtthdr *hdr; |
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mqtt_v_t *v; |
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if (!buf) |
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return -1; |
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if (mqtt_msgRealloc(buf, sizeof(struct mqtthdr) + sizeof(mqtt_v_t)) == -1) |
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return -1; |
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else { |
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hdr = (struct mqtthdr *) (buf->msg_base + siz); |
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siz += sizeof(struct mqtthdr); |
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v = (mqtt_v_t*) (buf->msg_base + siz); |
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siz += sizeof(mqtt_v_t); |
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} |
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/* fixed header */ |
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hdr->mqtt_msg.type = cmd; |
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*hdr->mqtt_len = sizeof(mqtt_v_t); |
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/* MessageID */ |
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v->val = htons(msgID); |
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return siz; |
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} |
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/* |
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* mqtt_msgPUBACK() Create PUBACK message |
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* |
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* @buf = Message buffer |
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* @msgID = MessageID |
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* return: -1 error or >-1 message size for send |
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*/ |
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inline int |
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mqtt_msgPUBACK(mqtt_msg_t * __restrict buf, u_short msgID) |
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{ |
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return _mqtt_msgPUB_(buf, MQTT_TYPE_PUBACK, msgID); |
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} |
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/* |
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* mqtt_msgPUBREC() Create PUBREC message |
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* |
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* @buf = Message buffer |
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* @msgID = MessageID |
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* return: -1 error or >-1 message size for send |
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*/ |
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inline int |
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mqtt_msgPUBREC(mqtt_msg_t * __restrict buf, u_short msgID) |
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{ |
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return _mqtt_msgPUB_(buf, MQTT_TYPE_PUBREC, msgID); |
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} |
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/* |
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* mqtt_msgPUBREL() Create PUBREL message |
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* |
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* @buf = Message buffer |
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* @msgID = MessageID |
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* return: -1 error or >-1 message size for send |
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*/ |
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inline int |
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mqtt_msgPUBREL(mqtt_msg_t * __restrict buf, u_short msgID) |
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{ |
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return _mqtt_msgPUB_(buf, MQTT_TYPE_PUBREL, msgID); |
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} |
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/* |
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* mqtt_msgPUBCOMP() Create PUBCOMP message |
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* |
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* @buf = Message buffer |
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* @msgID = MessageID |
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* return: -1 error or >-1 message size for send |
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*/ |
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inline int |
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mqtt_msgPUBCOMP(mqtt_msg_t * __restrict buf, u_short msgID) |
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{ |
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return _mqtt_msgPUB_(buf, MQTT_TYPE_PUBCOMP, msgID); |
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} |