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Annotation of libaitmqtt/src/srvside.c, revision 1.1.2.5

1.1.2.4   misho       1: /*************************************************************************
                      2: * (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
                      3: *  by Michael Pounov <misho@openbsd-bg.org>
                      4: *
                      5: * $Author: misho $
1.1.2.5 ! misho       6: * $Id: srvside.c,v 1.1.2.4 2012/04/07 20:48:39 misho Exp $
1.1.2.4   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: 
1.1.2.2   misho      49: /*
                     50:  * mqtt_srv_Init() Init MQTT server side support
                     51:  *
                     52:  * @sock = Client socket from accept()
                     53:  * @buf = Message buffer
                     54:  * return: NULL error or !=NULL allocated server handle
                     55:  */
                     56: mqtt_srv_t *
                     57: mqtt_srv_Init(int sock, mqtt_msg_t * __restrict buf)
                     58: {
                     59:        mqtt_srv_t *srv = NULL;
                     60: 
                     61:        if (!buf || !buf->msg_base || !buf->msg_len)
                     62:                return srv;
                     63: 
                     64:        srv = malloc(sizeof(mqtt_srv_t));
                     65:        if (!srv) {
                     66:                LOGERR;
                     67:                return srv;
                     68:        } else
                     69:                memset(srv, 0, sizeof(mqtt_srv_t));
                     70: 
                     71:        srv->sock = sock;
1.1.2.3   misho      72:        srv->buf = buf;
1.1.2.2   misho      73: 
                     74:        return srv;
                     75: }
                     76: 
                     77: /*
                     78:  * mqtt_srv_Fini() Finish MQTT server side support
                     79:  *
                     80:  * @psrv = Server handle
                     81:  * return: none
                     82:  */
                     83: void
                     84: mqtt_srv_Fini(mqtt_srv_t ** __restrict psrv)
                     85: {
                     86:        if (psrv && *psrv) {
                     87:                free(*psrv);
                     88:                *psrv = NULL;
                     89:        }
                     90: }
                     91: 
                     92: /*
                     93:  * mqtt_srv_Dispatch() MQTT server dispatcher
                     94:  *
                     95:  * @srv = Server handle
                     96:  * @arg = Argument pass to command callback
1.1.2.5 ! misho      97:  * @rlen = Ready bytes to parse
1.1.2.2   misho      98:  * return: -1 error or 0 ok
                     99:  */
                    100: int
1.1.2.5 ! misho     101: mqtt_srv_Dispatch(mqtt_srv_t * __restrict srv, void *arg, int rlen)
1.1.2.2   misho     102: {
                    103:        struct mqtthdr *hdr;
                    104: 
                    105:        if (!srv || !srv->buf->msg_base || !srv->buf->msg_len)
                    106:                return -1;
1.1.2.5 ! misho     107:        if (srv->buf->msg_len < sizeof(struct mqtthdr) || rlen < sizeof(struct mqtthdr)) {
1.1.2.4   misho     108:                mqtt_SetErr(EINVAL, "Message is too short ...");
1.1.2.2   misho     109:                return -1;
                    110:        }
                    111:        hdr = (struct mqtthdr*) srv->buf->msg_base;
                    112:        if (hdr->mqtt_msg.type > MQTT_TYPE_MAX) {
1.1.2.4   misho     113:                mqtt_SetErr(ENOSYS, "Message type %d not implemented", hdr->mqtt_msg.type);
1.1.2.2   misho     114:                return -1;
                    115:        }
                    116:        if (srv->cmds[hdr->mqtt_msg.type])
1.1.2.5 ! misho     117:                return srv->cmds[hdr->mqtt_msg.type]((void*) srv, rlen, arg);
1.1.2.2   misho     118: 
1.1.2.4   misho     119:        mqtt_SetErr(ENOTSUP, "Unsupported message type %d", hdr->mqtt_msg.type);
1.1.2.2   misho     120:        return -1;
                    121: }