libaitmqtt/src/cliside.c - diff

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Diff for /libaitmqtt/src/cliside.c between versions 1.1.2.1 and 1.1.2.8

-version 1.1.2.1, 2012/01/27 08:28:09
+version 1.1.2.8, 2012/06/19 15:55:01
  Line 1
+ /*************************************************************************
+ * (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
+ *  by Michael Pounov <misho@openbsd-bg.org>
+ *
+ * $Author$
+ * $Id$
+ *
+ **************************************************************************
+ The ELWIX and AITNET software is distributed under the following
+ terms:
+ All of the documentation and software included in the ELWIX and AITNET
+ Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
+ Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
+         by Michael Pounov <misho@elwix.org>.  All rights reserved.
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+. All advertising materials mentioning features or use of this software
+    must display the following acknowledgement:
+ This product includes software developed by Michael Pounov <misho@elwix.org>
+ ELWIX - Embedded LightWeight unIX and its contributors.
+. Neither the name of AITNET nor the names of its contributors
+    may be used to endorse or promote products derived from this software
+    without specific prior written permission.
+ THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ SUCH DAMAGE.
+ */
  #include "global.h"
+ /*
+  * mqtt_cli_Open() - Open client connection to MQTT broker
+  *
+  * @addr = brokers address
+  * @timeout = timeout
+  * return: NULL error or !=NULL connected to broker
+  */
+ mqtt_cli_t *
+ mqtt_cli_Open(struct sockaddr *addr, u_short timeout)
+ {
+         mqtt_cli_t *cli;
+         if (!addr)
+                 return NULL;
+         cli = malloc(sizeof(mqtt_cli_t));
+         if (!cli) {
+                 LOGERR;
+                 return NULL;
+         } else
+                 memset(cli, 0, sizeof(mqtt_cli_t));
+         cli->timeout = timeout;
+         cli->sock = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);
+         if (cli->sock == -1) {
+                 LOGERR;
+                 free(cli);
+                 return NULL;
+         }
+         if (connect(cli->sock, addr, addr->sa_len) == -1) {
+                 LOGERR;
+                 close(cli->sock);
+                 free(cli);
+                 return NULL;
+         }
+         cli->buf = mqtt_msgAlloc(USHRT_MAX);
+         if (!cli->buf) {
+                 close(cli->sock);
+                 free(cli);
+                 return NULL;
+         }
+         return cli;
+ }
+ /*
+  * mqtt_cli_Close() - Close client connection
+  *
+  * @cli = connected client
+  * return: -1 error or 0 disconnected client and freed all resources
+  */
+ int
+ mqtt_cli_Close(mqtt_cli_t ** __restrict cli)
+ {
+         int siz = 0;
+         if (!cli || !*cli)
+                 return -1;
+         /* send disconnect */
+         siz = mqtt_msgDISCONNECT((*cli)->buf);
+         if (siz > -1) {
+                 siz = send((*cli)->sock, (*cli)->buf->msg_base, siz, MSG_NOSIGNAL);
+                 if (siz > -1)
+                         shutdown((*cli)->sock, SHUT_RDWR);
+         }
+         close((*cli)->sock);
+         mqtt_msgFree(&(*cli)->buf, 42);
+         free(*cli);
+         *cli = NULL;
+         return 0;
+ }
+ /*
+  * mqtt_cli_Subscribe() - Subscribe to broker
+  *
+  * @cli = connected client
+  * @Topics = Topics for subscribes
+  * @msgID = Message ID
+  * @Dup = Duplicated request
+  * @QoS = Message QoS
+  * return: NULL error or !=NULL allocated array with subscribed QoS responses,
+  *      must be free() result!
+  */
+ u_char *
+ mqtt_cli_Subscribe(mqtt_cli_t * __restrict cli, mqtt_subscr_t * __restrict Topics,
+                 u_short msgID, u_char Dup, u_char QoS)
+ {
+         int siz = 0;
+         u_short mid = 0;
+         u_char *qoses = NULL;
+         if (!cli || !Topics)
+                 return NULL;
+         /* send subscribe */
+         siz = mqtt_msgSUBSCRIBE(cli->buf, Topics, msgID, Dup, QoS);
+         if (siz == -1)
+                 return NULL;
+         siz = send(cli->sock, cli->buf->msg_base, siz, MSG_NOSIGNAL);
+         if (siz == -1) {
+                 LOGERR;
+                 return NULL;
+         }
+         if ((siz = mqtt_wait4data(cli->sock, cli->timeout, POLLIN | POLLPRI)) == -1) {
+                 return NULL;
+         } else if (siz && mqtt_KeepAlive(cli->sock, cli->timeout, 1))
+                 return NULL;
+         /* receive suback */
+         siz = recv(cli->sock, cli->buf->msg_base, cli->buf->msg_len, 0);
+         if (siz == -1) {
+                 LOGERR;
+                 return NULL;
+         }
+         siz = mqtt_readSUBACK(cli->buf, &mid, &qoses);
+         if (siz == -1)
+                 return NULL;
+         if (msgID != mid) {
+                 free(qoses);
+                 mqtt_SetErr(ECANCELED, "Receive different message ID %hu != %hu", msgID, mid);
+                 return NULL;
+         }
+         return qoses;
+ }
+ /*
+  * mqtt_cli_Unsubscribe() - Unsubscribe from broker
+  *
+  * @cli = connected client
+  * @Topics = Topics for unsubscribes
+  * @msgID = Message ID
+  * @Dup = Duplicated request
+  * @QoS = Message QoS
+  * return: -1 error or 0 ok
+  */
+ int
+ mqtt_cli_Unsubscribe(mqtt_cli_t * __restrict cli, mqtt_subscr_t * __restrict Topics,
+                 u_short msgID, u_char Dup, u_char QoS)
+ {
+         int siz = 0;
+         if (!cli || !Topics)
+                 return -1;
+         /* send unsubscribe */
+         siz = mqtt_msgUNSUBSCRIBE(cli->buf, Topics, msgID, Dup, QoS);
+         if (siz == -1)
+                 return -1;
+         siz = send(cli->sock, cli->buf->msg_base, siz, MSG_NOSIGNAL);
+         if (siz == -1) {
+                 LOGERR;
+                 return -1;
+         }
+         if ((siz = mqtt_wait4data(cli->sock, cli->timeout, POLLIN | POLLPRI)) == -1) {
+                 return -1;
+         } else if (siz && mqtt_KeepAlive(cli->sock, cli->timeout, 1))
+                 return -1;
+         /* receive unsuback */
+         siz = recv(cli->sock, cli->buf->msg_base, cli->buf->msg_len, 0);
+         if (siz == -1) {
+                 LOGERR;
+                 return -1;
+         }
+         siz = mqtt_readUNSUBACK(cli->buf);
+         if (siz == -1)
+                 return -1;
+         if (msgID != siz) {
+                 mqtt_SetErr(ECANCELED, "Receive different message ID %hu != %hu", msgID, siz);
+                 return -1;
+         }
+         return 0;
+ }
+ /*
+  * mqtt_cli_Publish() - Publish message to broker
+  *
+  * @cli = connected client
+  * @msgID = Message ID
+  * @Dup = Duplicated request
+  * @QoS = Message QoS
+  * @Retain = Retain message
+  * @csTopic = Topic
+  * @pData = Data
+  * @datLen = Data length
+  * return: -1 error or > -1 sended bytes
+  */
+ int
+ mqtt_cli_Publish(mqtt_cli_t * __restrict cli, u_short msgID, u_char Dup, u_char QoS, u_char Retain,
+                 const char *csTopic, const void *pData, int datLen)
+ {
+         int wlen = 0, siz = 0;
+         if (!cli || !csTopic)
+                 return -1;
+         /* send publish */
+         siz = mqtt_msgPUBLISH(cli->buf, csTopic, msgID, Dup, QoS, Retain, pData, datLen);
+         if (siz == -1)
+                 return -1;
+         siz = send(cli->sock, cli->buf->msg_base, siz, MSG_NOSIGNAL);
+         if (siz == -1) {
+                 LOGERR;
+                 return -1;
+         } else
+                 wlen = siz;
+         if (QoS == MQTT_QOS_ONCE)       /* no reply */
+                 goto end;
+         if ((siz = mqtt_wait4data(cli->sock, cli->timeout, POLLIN | POLLPRI)) == -1) {
+                 return -1;
+         } else if (siz && mqtt_KeepAlive(cli->sock, cli->timeout, 1))
+                 return -1;
+         /* receive PUBxxx */
+         siz = recv(cli->sock, cli->buf->msg_base, cli->buf->msg_len, 0);
+         if (siz == -1) {
+                 LOGERR;
+                 return -1;
+         }
+         if (QoS == MQTT_QOS_ACK) {      /* reply with PUBACK */
+                 siz = mqtt_readPUBACK(cli->buf);
+                 if (siz == -1)
+                         return -1;
+                 if (msgID != siz) {
+                         mqtt_SetErr(ECANCELED, "Receive different message ID %hu != %hu", msgID, siz);
+                         return -1;
+                 }
+                 goto end;
+         } else {                        /* reply with PUBREC */
+                 siz = mqtt_readPUBREC(cli->buf);
+                 if (siz == -1)
+                         return -1;
+                 if (msgID != siz) {
+                         mqtt_SetErr(ECANCELED, "Receive different message ID %hu != %hu", msgID, siz);
+                         return -1;
+                 }
+         }
+         do {
+                 /* send publish release QoS == 2 */
+                 siz = mqtt_msgPUBREL(cli->buf, msgID);
+                 if (siz == -1)
+                         return -1;
+                 siz = send(cli->sock, cli->buf->msg_base, siz, MSG_NOSIGNAL);
+                 if (siz == -1) {
+                         LOGERR;
+                         return -1;
+                 }
+                 if ((siz = mqtt_wait4data(cli->sock, cli->timeout, POLLIN | POLLPRI)) == -1) {
+                         return -1;
+                 } else if (siz && mqtt_KeepAlive(cli->sock, cli->timeout, 1)) {
+                         if (Dup++ > 1)
+                                 return -1;
+                         else
+                                 continue;
+                 }
+                 /* receive PUBCOMP */
+                 siz = mqtt_readPUBCOMP(cli->buf);
+                 if (siz == -1)
+                         return -1;
+                 if (msgID != siz) {
+                         mqtt_SetErr(ECANCELED, "Receive different message ID %hu != %hu", msgID, siz);
+                         if (Dup++ > 1)
+                                 return -1;
+                         else
+                                 continue;
+                 }
+         } while (0);
+ end:
+         return wlen;
+ }

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	Added in v.1.1.2.8