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Diff for /libaitmqtt/src/cmds.c between versions 1.1.2.1 and 1.4.2.2

version 1.1.2.1, 2012/05/03 08:21:28 version 1.4.2.2, 2022/09/15 15:13:31
Line 1 Line 1
   /*************************************************************************
   * (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
   *  by Michael Pounov <misho@elwix.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 - 2022
           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:
   1. Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
   2. 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.
   3. 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.
   4. 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"  #include "global.h"
   
   
   #pragma GCC visibility push(hidden)
   
   int
   mqtt_wait4data(int sock, u_short ka, short events)
   {
           int ret = 0;
           struct pollfd pfd;
   
           if (sock < 3)
                   return -1;      /* error */
   
           pfd.fd = sock;
           pfd.events = POLLOUT;
           if ((ret = poll(&pfd, 1, ka * 1000)) == -1 || 
                           pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
                   LOGERR;
                   return -1;      /* error */
           } else if (!ret)
                   return 1;       /* timeout */
   
           return 0;               /* ready */
   }
   
   #pragma GCC visibility pop
   
   
   /*
    * mqtt_KeepAlive() - Keep Alive check routine
    *
    * @sock = connected socket
    * @ka = keep alive timeout
    * @tries = tries for receive correct ping response, usually ==1
    * return: -1 error, 0 host is alive, 1 timeout session or 2 broken session
    */
   int
   mqtt_KeepAlive(int sock, u_short ka, u_char tries)
   {
           int ret = 0;
           mqtt_msg_t *msg = NULL;
   
           if (sock < 3)
                   return -1;      /* error */
   
           if ((ret = mqtt_wait4data(sock, ka, POLLOUT)))
                   return ret;
           /* ping request */
           if (!(msg = mqtt_msgPINGREQ()))
                   return -1;      /* error */
           if ((ret = send(sock, msg->msg_base, msg->msg_len, MSG_NOSIGNAL)) == -1) {
                   LOGERR;
                   goto end;
           } else
                   mqtt_msgFree(&msg, 0);
   
           while (tries--) {
                   if ((ret = mqtt_wait4data(sock, ka, POLLIN | POLLPRI))) {
                           if (ret == -1)
                                   break;
                           else
                                   continue;
                   }
                   /* receive & decode packet */
                   msg = mqtt_msgAlloc(BUFSIZ);
                   if ((ret = recv(sock, msg->msg_base, msg->msg_len, 0)) == -1) {
                           LOGERR;
                           break;
                   }
                   if (!mqtt_readPINGRESP(msg)) {
                           ret = 0;        /* Host is alive */
                           break;
                   } else
                           ret = 2;        /* Session is broken ... must be disconnect! */
           }
   end:
           mqtt_msgFree(&msg, 0);
           return ret;
   }
   
   /*
    * mqtt_WillMessage() - Publish WILL message
    *
    * @sock = connected socket
    * @ka = keep alive timeout
    * @topic = will topic
    * @data = will message
    * return: -1 error, 1 timeout, 2 not ack or 0 ok
    */
   int
   mqtt_WillMessage(int sock, u_short ka, const char *topic, const char *data)
   {
           int ret = 0;
           mqtt_msg_t *msg = NULL;
   
           if (!topic)
                   return -1;      /* error */
   
           /* will message */
           if ((ret = mqtt_wait4data(sock, ka, POLLOUT)))
                   return ret;
           msg = mqtt_msgPUBLISH(topic, 0xDEAD, 0, 1, 0, data, data ? strlen(data) : 0);
           if (!msg)
                   return -1;      /* error */
           if ((ret = send(sock, msg->msg_base, msg->msg_len, MSG_NOSIGNAL)) == -1) {
                   LOGERR;
                   mqtt_msgFree(&msg, 0);
                   return -1;      /* error */
           } else
                   mqtt_msgFree(&msg, 0);
   
           /* will ack */
           if ((ret = mqtt_wait4data(sock, ka, POLLIN | POLLPRI)))
                   return ret;
           /* receive & decode packet */
           msg = mqtt_msgAlloc(BUFSIZ);
           if ((ret = recv(sock, msg->msg_base, msg->msg_len, 0)) == -1) {
                   LOGERR;
                   mqtt_msgFree(&msg, 0);
                   return -1;      /* error */
           }
           if (mqtt_readPUBACK(msg))
                   ret = 0;        /* ok */
           else
                   ret = 2;        /* semi-error */
   
           mqtt_msgFree(&msg, 0);
           return ret;
   }
Removed from v.1.1.2.1  
changed lines
  Added in v.1.4.2.2

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