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Annotation of libaitmqtt/src/cliside.c, revision 1.1.2.3

1.1.2.2   misho       1: /*************************************************************************
                      2: * (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
                      3: *  by Michael Pounov <misho@openbsd-bg.org>
                      4: *
                      5: * $Author: misho $
1.1.2.3 ! misho       6: * $Id: cliside.c,v 1.1.2.2 2012/04/07 21:02:48 misho Exp $
1.1.2.2   misho       7: *
                      8: **************************************************************************
                      9: The ELWIX and AITNET software is distributed under the following
                     10: terms:
                     11: 
                     12: All of the documentation and software included in the ELWIX and AITNET
                     13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
                     14: 
                     15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
                     16:        by Michael Pounov <misho@elwix.org>.  All rights reserved.
                     17: 
                     18: Redistribution and use in source and binary forms, with or without
                     19: modification, are permitted provided that the following conditions
                     20: are met:
                     21: 1. Redistributions of source code must retain the above copyright
                     22:    notice, this list of conditions and the following disclaimer.
                     23: 2. Redistributions in binary form must reproduce the above copyright
                     24:    notice, this list of conditions and the following disclaimer in the
                     25:    documentation and/or other materials provided with the distribution.
                     26: 3. All advertising materials mentioning features or use of this software
                     27:    must display the following acknowledgement:
                     28: This product includes software developed by Michael Pounov <misho@elwix.org>
                     29: ELWIX - Embedded LightWeight unIX and its contributors.
                     30: 4. Neither the name of AITNET nor the names of its contributors
                     31:    may be used to endorse or promote products derived from this software
                     32:    without specific prior written permission.
                     33: 
                     34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
                     35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     37: ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     44: SUCH DAMAGE.
                     45: */
1.1.2.1   misho      46: #include "global.h"
                     47: 
                     48: 
1.1.2.3 ! misho      49: /*
        !            50:  * mqtt_cli_Open() - Open client connection to MQTT broker
        !            51:  *
        !            52:  * @addr = brokers address
        !            53:  * return: NULL error or !=NULL connected to broker
        !            54:  */
        !            55: mqtt_cli_t *
        !            56: mqtt_cli_Open(struct sockaddr *addr)
        !            57: {
        !            58:        mqtt_cli_t *cli;
        !            59: 
        !            60:        if (!addr)
        !            61:                return NULL;
        !            62: 
        !            63:        cli = malloc(sizeof(mqtt_cli_t));
        !            64:        if (!cli) {
        !            65:                LOGERR;
        !            66:                return NULL;
        !            67:        } else
        !            68:                memset(cli, 0, sizeof(mqtt_cli_t));
        !            69: 
        !            70:        cli->sock = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);
        !            71:        if (cli->sock == -1) {
        !            72:                LOGERR;
        !            73:                free(cli);
        !            74:                return NULL;
        !            75:        }
        !            76:        if (connect(cli->sock, addr, addr->sa_len) == -1) {
        !            77:                LOGERR;
        !            78:                close(cli->sock);
        !            79:                free(cli);
        !            80:                return NULL;
        !            81:        }
        !            82: 
        !            83:        cli->buf = mqtt_msgAlloc(USHRT_MAX);
        !            84:        if (!cli->buf) {
        !            85:                close(cli->sock);
        !            86:                free(cli);
        !            87:                return NULL;
        !            88:        }
        !            89: 
        !            90:        return cli;
        !            91: }
        !            92: 
        !            93: /*
        !            94:  * mqtt_cli_Close() - Close client connection
        !            95:  *
        !            96:  * @cli = connected client
        !            97:  * return: -1 error or 0 disconnected client and freed all resources
        !            98:  */
        !            99: int
        !           100: mqtt_cli_Close(mqtt_cli_t ** __restrict cli)
        !           101: {
        !           102:        int siz = 0;
        !           103: 
        !           104:        if (!cli || !*cli)
        !           105:                return -1;
        !           106: 
        !           107:        /* send disconnect */
        !           108:        siz = mqtt_msgDISCONNECT((*cli)->buf);
        !           109:        if (siz > -1) {
        !           110:                siz = send((*cli)->sock, (*cli)->buf->msg_base, siz, MSG_NOSIGNAL);
        !           111:                if (siz > -1)
        !           112:                        shutdown((*cli)->sock, SHUT_RDWR);
        !           113:        }
        !           114:        close((*cli)->sock);
        !           115: 
        !           116:        mqtt_msgFree(&(*cli)->buf, 42);
        !           117: 
        !           118:        free(*cli);
        !           119:        *cli = NULL;
        !           120:        return 0;
        !           121: }