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version 2.0

    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: dl.c,v 1.5 2017/10/08 22:49:25 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: #include "rtlm.h"
   48: 
   49: 
   50: struct tagCallbacks call;
   51: 
   52: 
   53: /*
   54:  * mqttLog() Log message to syslog
   55:  *
   56:  * @fmt = format string
   57:  * @... = argument list
   58:  * return: none
   59:  */
   60: void
   61: mqttLog(const char *fmt, ...)
   62: {
   63: 	va_list lst;
   64: 
   65: 	va_start(lst, fmt);
   66: 	vsyslog(LOG_ERR, fmt, lst);
   67: 	va_end(lst);
   68: }
   69: 
   70: void *
   71: mqttLoadRTLM(cfg_root_t *cfg, int modtype)
   72: {
   73: 	const char *str, *attr;
   74: 	void *rtlm = NULL;
   75: 	void *(*mqttOpenRTLM)(cfg_root_t *);
   76: 	void (*mqttCloseRTLM)(void *);
   77: 
   78: 	if (!cfg)
   79: 		return NULL;
   80: 
   81: 	switch (modtype) {
   82: 		case 0:
   83: 			attr = "acc_file";
   84: 			break;
   85: 		case 1:
   86: 			attr = "pub_file";
   87: 			break;
   88: 		default:
   89: 			attr = "log_file";
   90: 			break;
   91: 	}
   92: 
   93: 	str = cfg_getAttribute(cfg, "mqttd", attr);
   94: 	if (!str) {
   95: 		mqttLog("Error:: RTL module not found\n");
   96: 		return NULL;
   97: 	}
   98: 
   99: 	rtlm = dlopen(str, RTLD_NOW);
  100: 	if (!rtlm) {
  101: 		mqttLog("Error:: RTL module %s not found %s\n", str, dlerror());
  102: 		return NULL;
  103: 	}
  104: 
  105: 	mqttOpenRTLM = dlsym(rtlm, "mqtt_rtlm_open");
  106: 	if (!mqttOpenRTLM) {
  107: 		mqttLog("Error:: Can't found mqtt_rtlm_open call\n");
  108: 		dlclose(rtlm);
  109: 		return NULL;
  110: 	}
  111: 	mqttCloseRTLM = dlsym(rtlm, "mqtt_rtlm_close");
  112: 	if (!mqttCloseRTLM) {
  113: 		mqttLog("Error:: Can't found mqtt_rtlm_close call\n");
  114: 		dlclose(rtlm);
  115: 		return NULL;
  116: 	}
  117: 
  118: 	switch (modtype) {
  119: 		case 0:
  120: 			call.OpenACC = mqttOpenRTLM;
  121: 			call.CloseACC = mqttCloseRTLM;
  122: 			call.LoginACC = dlsym(rtlm, "mqtt_rtlm_login");
  123: 			if (!call.LoginACC) {
  124: 				mqttLog("Error:: incorrect module ...\n");
  125: 				dlclose(rtlm);
  126: 				return NULL;
  127: 			}
  128: 			break;
  129: 		case 1:
  130: 			call.OpenPUB = mqttOpenRTLM;
  131: 			call.ClosePUB = mqttCloseRTLM;
  132: 			call.InitSessPUB = dlsym(rtlm, "mqtt_rtlm_init_session");
  133: 			call.FiniSessPUB = dlsym(rtlm, "mqtt_rtlm_fini_session");
  134: 			call.ChkSessPUB = dlsym(rtlm, "mqtt_rtlm_chk_session");
  135: 			call.WritePUB_topic = dlsym(rtlm, "mqtt_rtlm_write_topic");
  136: 			call.ReadPUB_topic = dlsym(rtlm, "mqtt_rtlm_read_topic");
  137: 			call.DeletePUB_topic = dlsym(rtlm, "mqtt_rtlm_delete_topic");
  138: 			call.WipePUB_topic = dlsym(rtlm, "mqtt_rtlm_wipe_topic");
  139: 			call.WritePUB_subscribe = dlsym(rtlm, "mqtt_rtlm_write_subscribe");
  140: 			call.ReadPUB_subscribe = dlsym(rtlm, "mqtt_rtlm_read_subscribe");
  141: 			call.DeletePUB_subscribe = dlsym(rtlm, "mqtt_rtlm_delete_subscribe");
  142: 			if (!call.InitSessPUB || !call.FiniSessPUB || !call.ChkSessPUB || 
  143: 					!call.WritePUB_topic || !call.ReadPUB_topic || 
  144: 					!call.DeletePUB_topic || !call.WritePUB_subscribe || 
  145: 					!call.ReadPUB_subscribe || !call.DeletePUB_subscribe) {
  146: 				mqttLog("Error:: incorrect module ...\n");
  147: 				dlclose(rtlm);
  148: 				return NULL;
  149: 			}
  150: 			break;
  151: 		default:
  152: 			call.OpenLOG = mqttOpenRTLM;
  153: 			call.CloseLOG = mqttCloseRTLM;
  154: 			call.LOG = dlsym(rtlm, "mqtt_rtlm_logger");
  155: 			if (!call.LOG) {
  156: 				mqttLog("Error:: incorrect module ...\n");
  157: 				dlclose(rtlm);
  158: 				return NULL;
  159: 			}
  160: 			break;
  161: 	}
  162: 
  163: 	return rtlm;
  164: }
  165: 
  166: void
  167: mqttUnloadRTLM(void *rtlm)
  168: {
  169: 	if (rtlm)
  170: 		dlclose(rtlm);
  171: }
  172: 
  173: int
  174: mqttMkDir(cfg_root_t *cfg)
  175: {
  176: 	const char *str;
  177: 
  178: 	if (!cfg)
  179: 		return -1;
  180: 
  181: 	str = (const char*) cfg_getAttribute(cfg, "mqttd", "statedir");
  182: 	if (!str)
  183: 		return -1;
  184: 
  185: 	if (mkdir(str, 0600) == -1 && errno != EEXIST)
  186: 		return -1;
  187: 
  188: 	return 0;
  189: }