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: mqttd.c,v 1.4 2012/07/03 12:46:00 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 "mqttd.h"
48: #include "rtlm.h"
49: #include "utils.h"
50: #include "daemon.h"
51:
52:
53: io_enableDEBUG;
54:
55: cfg_root_t cfg;
56: sessions_t Sessions;
57: sched_root_task_t *root;
58: sqlite3 *acc, *pub;
59: FILE *logg;
60: extern char compiled[], compiledby[], compilehost[];
61: static char szCfgName[MAXPATHLEN];
62: volatile intptr_t Kill;
63:
64:
65: static void
66: Usage(void)
67: {
68: printf( " -= MQTT Broker =- MQTT Service from ELWIX\n"
69: "=== %s@%s === Compiled: %s ===\n\n"
70: "\t-c <config>\tService config\n"
71: "\t-b\t\tBatch mode\n"
72: "\t-v\t\tVerbose (more -vvv, more verbose)\n"
73: "\t-h\t\tHelp! This screen\n\n",
74: compiledby, compilehost, compiled);
75: }
76:
77: static void
78: sigHand(int sig)
79: {
80: int stat;
81:
82: switch (sig) {
83: case SIGHUP:
84: cfgUnloadConfig(&cfg);
85: if (!cfgLoadConfig(szCfgName, &cfg)) {
86: ioDEBUG(1, "Config reload OK!");
87: break;
88: }
89:
90: ioLIBERR(cfg);
91: case SIGINT:
92: case SIGTERM:
93: ioDEBUG(1, "Terminate MQTT service in progress");
94: Kill++;
95: break;
96: case SIGCHLD:
97: while (waitpid(-1, &stat, WNOHANG) > 0);
98: break;
99: case SIGPIPE:
100: break;
101: }
102: }
103:
104:
105: int
106: main(int argc, char **argv)
107: {
108: char ch, batch = 0;
109: register int i;
110: int sock = -1, ret = 0;
111: struct passwd *pass;
112: struct sigaction sa;
113: ait_val_t v;
114:
115: TAILQ_INIT(&Sessions);
116:
117: strlcpy(szCfgName, DEFAULT_CONFIG, sizeof szCfgName);
118: while ((ch = getopt(argc, argv, "hvbc:")) != -1)
119: switch (ch) {
120: case 'c':
121: strlcpy(szCfgName, optarg, sizeof szCfgName);
122: break;
123: case 'b':
124: batch++;
125: break;
126: case 'v':
127: io_incDebug;
128: break;
129: case 'h':
130: default:
131: Usage();
132: return 1;
133: }
134: argc -= optind;
135: argv += optind;
136:
137: if (cfgLoadConfig(szCfgName, &cfg)) {
138: printf("Error:: can't load #%d - %s\n", cfg_GetErrno(), cfg_GetError());
139: return 1;
140: }
141: openlog("mqttd", LOG_PID | LOG_CONS, LOG_DAEMON);
142: /* load 3 plugins */
143: for (i = 0; i < 3; i++)
144: if (!mqttLoadRTLM(&cfg, i)) {
145: printf("Error:: Can't load RTL module\n");
146: mqttUnloadRTLM(acc);
147: mqttUnloadRTLM(pub);
148: mqttUnloadRTLM(logg);
149: cfgUnloadConfig(&cfg);
150: closelog();
151: return 2;
152: }
153: acc = call.OpenACC(&cfg);
154: if (!acc) {
155: ret = 3;
156: goto end;
157: }
158: pub = call.OpenPUB(&cfg);
159: if (!pub) {
160: ret = 3;
161: goto end;
162: }
163: logg = call.OpenLOG(&cfg);
164: if (!logg) {
165: ret = 3;
166: goto end;
167: }
168:
169:
170: if (mqttMkDir(&cfg)) {
171: printf("Error:: in statedir #%d - %s\n", errno, strerror(errno));
172: ret = 3;
173: goto end;
174: }
175:
176: if (!batch)
177: switch (fork()) {
178: case -1:
179: printf("Error:: in fork() #%d - %s\n", errno, strerror(errno));
180: ret = 5;
181: goto end;
182: case 0:
183: setsid();
184:
185: ret = open("/dev/null", O_RDWR);
186: if (ret != -1) {
187: dup2(ret, STDIN_FILENO);
188: dup2(ret, STDOUT_FILENO);
189: dup2(ret, STDERR_FILENO);
190: close(ret);
191: }
192: ioDEBUG(2, "Welcome MQTT service into shadow land!");
193: break;
194: default:
195: ioDEBUG(2, "MQTT service go to shadow land ...");
196: sleep(1);
197: ret = 0;
198: goto end;
199: }
200: else
201: ioDEBUG(1, "Start service in batch mode ...");
202:
203: memset(&sa, 0, sizeof sa);
204: sigemptyset(&sa.sa_mask);
205: sa.sa_handler = sigHand;
206: sigaction(SIGHUP, &sa, NULL);
207: sigaction(SIGINT, &sa, NULL);
208: sigaction(SIGTERM, &sa, NULL);
209: sigaction(SIGCHLD, &sa, NULL);
210: sigaction(SIGPIPE, &sa, NULL);
211: ioDEBUG(2, "Service is ready for starting engine ...");
212:
213: if ((sock = srv_Socket(&cfg)) == -1) {
214: ret = 4;
215: goto end;
216: }
217:
218: cfg_loadAttribute(&cfg, "mqttd", "user", &v, MQTT_USER);
219: pass = getpwnam(AIT_GET_STR(&v));
220: AIT_FREE_VAL(&v);
221: if (pass) {
222: setgid(pass->pw_gid);
223: setuid(pass->pw_uid);
224: ioDEBUG(2, "Try to change group #%d and user #%d", pass->pw_gid, pass->pw_uid);
225: }
226:
227: if (!(root = schedBegin())) {
228: ioLIBERR(sched);
229: ret = 6;
230: goto end;
231: }
232:
233: /* go catch the cat ... */
234: Run(sock);
235:
236: schedEnd(&root);
237: end: /* free all resources */
238: srv_Close(sock);
239: call.CloseLOG(logg);
240: call.ClosePUB(pub);
241: call.CloseACC(acc);
242: mqttUnloadRTLM(acc);
243: mqttUnloadRTLM(pub);
244: mqttUnloadRTLM(logg);
245: cfgUnloadConfig(&cfg);
246: closelog();
247: return ret;
248: }
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