1: #include "global.h"
2: #include "rtlm.h"
3: #include "mqttd.h"
4:
5:
6: static inline struct tagSession *
7: initSession(int sock, ait_val_t * __restrict v)
8: {
9: struct tagSession *sess = NULL;
10: const char *str;
11:
12: FTRACE(5);
13:
14: if (!v)
15: return NULL;
16:
17: sess = malloc(sizeof(struct tagSession));
18: if (!sess) {
19: VERB(3) syslog(LOG_ERR, "Error:: in malloc #%d - %s", errno, strerror(errno));
20: io_freeVar(v);
21: return NULL;
22: } else
23: memset(sess, 0, sizeof(struct tagSession));
24:
25: str = (const char*) cfg_GetAttribute(&cfg, CFG("mqttd"), CFG("retry"));
26: if (!str)
27: sess->sess_retry = DEFAULT_RETRY;
28: else
29: sess->sess_retry = strtol(str, NULL, 0);
30:
31: sess->sess_buf = mqtt_msgAlloc(0);
32: if (!sess->sess_buf) {
33: VERB(3) syslog(LOG_ERR, "Error:: in msgAlloc #%d - %s", mqtt_GetErrno(), mqtt_GetError());
34: free(sess);
35: io_freeVar(v);
36: return NULL;
37: }
38:
39: sess->sess_sock = sock;
40: strlcpy(sess->sess_addr, (char*) AIT_GET_STR(v), sizeof sess->sess_addr);
41: io_freeVar(v);
42: return sess;
43: }
44:
45: static void
46: finiSession(struct tagSession *sess)
47: {
48: register int i;
49: struct tagStore *store;
50:
51: FTRACE(5);
52:
53: if (!sess)
54: return;
55:
56: for (i = 0; i < MQTT_QOS_RESERVED; i++)
57: while ((store = SLIST_FIRST(&sess->sess_store[i]))) {
58: SLIST_REMOVE_HEAD(&sess->sess_store[i], st_node);
59: free(store);
60: }
61:
62: if (sess->sess_will.msg)
63: free(sess->sess_will.msg);
64: if (sess->sess_will.topic)
65: free(sess->sess_will.topic);
66:
67: if (sess->sess_sock > STDERR_FILENO) {
68: shutdown(sess->sess_sock, SHUT_RDWR);
69: close(sess->sess_sock);
70: }
71:
72: mqtt_msgFree(&sess->sess_buf, 42);
73:
74: free(sess);
75: }
76:
77: static void *
78: thrSession(struct tagSession *sess)
79: {
80: void thrClean(struct tagSession *sess)
81: {
82: pthread_mutex_lock(&mtx_sess);
83: TAILQ_REMOVE(&Sessions, sess, sess_node);
84: pthread_mutex_unlock(&mtx_sess);
85: VERB(1) syslog(LOG_DEBUG, "Close socket=%d", sess->sess_sock);
86: finiSession(sess);
87: }
88:
89: pthread_cleanup_push((void(*)(void*)) thrClean, sess);
90:
91: FTRACE(2);
92:
93: pthread_cleanup_pop(42);
94: pthread_exit(NULL);
95: }
96:
97: static void *
98: startSession(sched_task_t *task)
99: {
100: u_char basebuf[USHRT_MAX];
101: mqtt_msg_t msg = { NULL, 0 }, buf = { basebuf, sizeof basebuf };
102: mqtthdr_connflgs_t flg;
103: mqtthdr_connack_t cack;
104: struct tagSession *sess = NULL;
105: int ret;
106: pthread_attr_t attr;
107:
108: FTRACE(4);
109:
110: sess = initSession(TASK_FD(task), TASK_ARG(task));
111: if (!sess) {
112: io_freeVar(TASK_ARG(task));
113: close(TASK_FD(task));
114: return NULL;
115: }
116:
117: /* receive & decode packet */
118: if (recv(sess->sess_sock, buf.msg_base, buf.msg_len, 0) == -1) {
119: VERB(3) syslog(LOG_ERR, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
120: finiSession(sess);
121: return NULL;
122: }
123: cack = mqtt_readCONNECT(&buf, &sess->sess_ka, sess->sess_cid, sizeof sess->sess_cid,
124: sess->sess_user, sizeof sess->sess_user, sess->sess_pass, sizeof sess->sess_pass,
125: &sess->sess_will.topic, &sess->sess_will.msg);
126: ret = cack.retcode;
127: flg.flags = cack.reserved;
128: if (flg.reserved) {
129: VERB(3) syslog(LOG_ERR, "Error:: in MQTT protocol #%d - %s", mqtt_GetErrno(), mqtt_GetError());
130: goto end;
131: } else {
132: sess->sess_clean = flg.clean_sess;
133: sess->sess_will.qos = flg.will_qos;
134: sess->sess_will.retain = flg.will_retain;
135: sess->sess_will.flag = flg.will_flg;
136: }
137:
138: /* check online table for user */
139: if (call.LoginACC(&cfg, acc, sess->sess_user, sess->sess_pass) < 1) {
140: VERB(1) syslog(LOG_WARNING, "Login:: DENIED for username %s and password %s",
141: sess->sess_user, sess->sess_pass);
142: goto end;
143: } else
144: VERB(1) syslog(LOG_WARNING, "Login:: ALLOWED for username %s ...", sess->sess_user);
145:
146: ret = mqtt_msgCONNACK(&msg, ret);
147: if ((ret = send(sess->sess_sock, msg.msg_base, ret, 0)) == -1) {
148: VERB(3) syslog(LOG_ERR, "Error:: send(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
149: finiSession(sess);
150: return NULL;
151: } else {
152: VERB(5) ioLOGGER(LOG_DEBUG, "Sended %d bytes", ret);
153: free(msg.msg_base);
154: msg.msg_len = 0;
155: }
156:
157: /* Start session thread OK ... */
158: pthread_attr_init(&attr);
159: pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
160:
161: pthread_mutex_lock(&mtx_sess);
162: TAILQ_INSERT_TAIL(&Sessions, sess, sess_node);
163: pthread_create(&sess->sess_tid, &attr, (void*(*)(void*)) thrSession, sess);
164: pthread_mutex_unlock(&mtx_sess);
165:
166: VERB(1) ioLOGGER(LOG_DEBUG, "ConnID=%s(%s) for %s login OK!",
167: sess->sess_cid, sess->sess_user, sess->sess_addr);
168:
169: pthread_attr_destroy(&attr);
170: return NULL;
171: end: /* close client connection */
172: ret = mqtt_msgCONNACK(&msg, ret);
173: if ((ret = send(sess->sess_sock, msg.msg_base, ret, 0)) == -1) {
174: VERB(3) syslog(LOG_ERR, "Error:: send(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
175: } else {
176: VERB(5) ioLOGGER(LOG_DEBUG, "Sended %d bytes", ret);
177: free(msg.msg_base);
178: msg.msg_len = 0;
179: }
180:
181: VERB(1) ioLOGGER(LOG_DEBUG, "Close client %s with socket=%d", sess->sess_addr, sess->sess_sock);
182: finiSession(sess);
183: return NULL;
184: }
185:
186: /* ----------------------------------------------------------------------- */
187:
188: static void *
189: thrSched(void *arg __unused)
190: {
191: FTRACE(1);
192: struct tagSession *sess;
193:
194: schedRun(root, (intptr_t*) &Kill);
195:
196: TAILQ_FOREACH(sess, &Sessions, sess_node)
197: if (sess->sess_tid)
198: pthread_cancel(sess->sess_tid);
199: pthread_exit(NULL);
200: }
201:
202: int
203: Run(int sock)
204: {
205: io_sockaddr_t sa;
206: socklen_t sslen = sizeof sa.ss;
207: int cli;
208: pthread_t tid;
209: ait_val_t *v;
210:
211: FTRACE(1);
212:
213: if (pthread_create(&tid, NULL, thrSched, NULL)) {
214: syslog(LOG_ERR, "Error:: thread scheduler #%d - %s", errno, strerror(errno));
215: return -1;
216: } else
217: pthread_detach(tid);
218: VERB(2) ioLOGGER(LOG_DEBUG, "Run scheduler management thread");
219:
220: if (listen(sock, SOMAXCONN) == -1) {
221: syslog(LOG_ERR, "Error:: listen(%d) #%d - %s\n", sock, errno, strerror(errno));
222: pthread_cancel(tid);
223: return -1;
224: }
225:
226: while (!Kill) {
227: if ((cli = accept(sock, &sa.sa, &sslen)) == -1) {
228: syslog(LOG_ERR, "Error:: accept() #%d - %s", errno, strerror(errno));
229: continue;
230: }
231: v = io_allocVar();
232: if (!v) {
233: ioLIBERR(mqtt);
234: break;
235: } else
236: io_n2addr(&sa, v);
237: VERB(1) ioLOGGER(LOG_DEBUG, "Connected client with socket=%d from %s:%d", cli,
238: AIT_GET_STR(v), io_n2port(&sa));
239:
240: if (!schedRead(root, startSession, v, cli)) {
241: io_freeVar(v);
242: close(cli);
243: VERB(1) ioLOGGER(LOG_DEBUG, "Terminated client with socket=%d", cli);
244: }
245: }
246:
247: return 0;
248: }
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