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Annotation of libaitmqtt/src/srvside.c, revision 1.2

1.2     ! misho       1: /*************************************************************************
        !             2: * (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
        !             3: *  by Michael Pounov <misho@openbsd-bg.org>
        !             4: *
        !             5: * $Author: misho $
        !             6: * $Id: srvside.c,v 1.1.2.7 2012/05/08 09:07:31 misho Exp $
        !             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: */
        !            46: #include "global.h"
        !            47: 
        !            48: 
        !            49: /*
        !            50:  * mqtt_srv_Init() Init MQTT server side support
        !            51:  *
        !            52:  * @sock = Client socket from accept()
        !            53:  * @buf = Message buffer
        !            54:  * @timeout = timeout
        !            55:  * return: NULL error or !=NULL allocated server handle
        !            56:  */
        !            57: mqtt_srv_t *
        !            58: mqtt_srv_Init(int sock, mqtt_msg_t * __restrict buf, u_short timeout)
        !            59: {
        !            60:        mqtt_srv_t *srv = NULL;
        !            61: 
        !            62:        if (!buf || !buf->msg_base || !buf->msg_len)
        !            63:                return srv;
        !            64: 
        !            65:        srv = malloc(sizeof(mqtt_srv_t));
        !            66:        if (!srv) {
        !            67:                LOGERR;
        !            68:                return srv;
        !            69:        } else
        !            70:                memset(srv, 0, sizeof(mqtt_srv_t));
        !            71: 
        !            72:        srv->sock = sock;
        !            73:        srv->buf = buf;
        !            74:        srv->timeout = timeout;
        !            75: 
        !            76:        return srv;
        !            77: }
        !            78: 
        !            79: /*
        !            80:  * mqtt_srv_Fini() Finish MQTT server side support
        !            81:  *
        !            82:  * @psrv = Server handle
        !            83:  * return: none
        !            84:  */
        !            85: void
        !            86: mqtt_srv_Fini(mqtt_srv_t ** __restrict psrv)
        !            87: {
        !            88:        if (psrv && *psrv) {
        !            89:                free(*psrv);
        !            90:                *psrv = NULL;
        !            91:        }
        !            92: }
        !            93: 
        !            94: /*
        !            95:  * mqtt_srv_Dispatch() MQTT server dispatcher
        !            96:  *
        !            97:  * @srv = Server handle
        !            98:  * @rlen = Ready bytes to parse
        !            99:  * @arg = Argument pass to command callback
        !           100:  * return: -1 error or 0 ok
        !           101:  */
        !           102: int
        !           103: mqtt_srv_Dispatch(mqtt_srv_t * __restrict srv, int rlen, void *arg)
        !           104: {
        !           105:        struct mqtthdr *hdr;
        !           106: 
        !           107:        if (!srv || !srv->buf->msg_base || !srv->buf->msg_len)
        !           108:                return -1;
        !           109:        if (srv->buf->msg_len < sizeof(struct mqtthdr) || rlen < sizeof(struct mqtthdr)) {
        !           110:                mqtt_SetErr(EINVAL, "Message is too short ...");
        !           111:                return -1;
        !           112:        }
        !           113:        hdr = (struct mqtthdr*) srv->buf->msg_base;
        !           114:        if (hdr->mqtt_msg.type > MQTT_TYPE_MAX) {
        !           115:                mqtt_SetErr(ENOSYS, "Message type %d not implemented", hdr->mqtt_msg.type);
        !           116:                return -1;
        !           117:        }
        !           118:        if (srv->cmds[hdr->mqtt_msg.type])
        !           119:                return srv->cmds[hdr->mqtt_msg.type]((void*) srv, rlen, arg);
        !           120: 
        !           121:        mqtt_SetErr(ENOTSUP, "Unsupported message type %d", hdr->mqtt_msg.type);
        !           122:        return -1;
        !           123: }