Annotation of mqtt/src/daemon.c, revision 1.2.2.38
1.2 misho 1: #include "global.h"
2: #include "rtlm.h"
3: #include "utils.h"
4: #include "mqttd.h"
5: #include "mqttd_calls.h"
6:
7:
8: static inline struct tagSession *
9: initSession(int sock, ait_val_t * __restrict v)
10: {
11: struct tagSession *sess = NULL;
12: const char *str;
13:
14: ioTRACE(5);
15:
16: if (!v)
17: return NULL;
18:
1.2.2.33 misho 19: sess = io_malloc(sizeof(struct tagSession));
1.2 misho 20: if (!sess) {
1.2.2.9 misho 21: ioSYSERR(0);
1.2 misho 22: return NULL;
23: } else
24: memset(sess, 0, sizeof(struct tagSession));
25:
1.2.2.9 misho 26: SLIST_INIT(&sess->sess_subscr);
1.2 misho 27:
1.2.2.5 misho 28: str = cfg_getAttribute(&cfg, "mqttd", "retry");
1.2 misho 29: if (!str)
30: sess->sess_retry = DEFAULT_RETRY;
31: else
32: sess->sess_retry = strtol(str, NULL, 0);
33:
34: sess->sess_buf = mqtt_msgAlloc(USHRT_MAX);
35: if (!sess->sess_buf) {
1.2.2.9 misho 36: ioLIBERR(mqtt);
1.2.2.33 misho 37: io_free(sess);
1.2 misho 38: return NULL;
39: }
40:
1.2.2.8 misho 41: /* init server actor */
1.2.2.28 misho 42: sess->sess_srv = mqtt_srv_Init(sock, sess->sess_buf, sess->sess_ka);
1.2.2.2 misho 43: if (!sess->sess_srv) {
44: ioDEBUG(3, "Error:: in srv_Init #%d - %s", mqtt_GetErrno(), mqtt_GetError());
45: mqtt_msgFree(&sess->sess_buf, 42);
1.2.2.33 misho 46: io_free(sess);
1.2.2.2 misho 47: return NULL;
1.2.2.3 misho 48: } else {
49: mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_CONNECT, cmdCONNECT);
50: mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_PUBLISH, cmdPUBLISH);
51: mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_PUBREL, cmdPUBREL);
52: mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_SUBSCRIBE, cmdSUBSCRIBE);
53: mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_UNSUBSCRIBE, cmdUNSUBSCRIBE);
54: mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_PINGREQ, cmdPINGREQ);
55: mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_DISCONNECT, cmdDISCONNECT);
1.2.2.2 misho 56: }
57:
1.2 misho 58: sess->sess_sock = sock;
59: strlcpy(sess->sess_addr, (char*) AIT_GET_STR(v), sizeof sess->sess_addr);
60: return sess;
61: }
62:
1.2.2.25 misho 63: static void
1.2.2.9 misho 64: finiSession(struct tagSession *sess)
1.2 misho 65: {
66: struct tagStore *store;
67:
68: ioTRACE(5);
69:
70: if (!sess)
71: return;
72:
1.2.2.29 misho 73: if (sess->sess_clean) {
74: if (call.FiniSessPUB)
75: call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%");
76: if (call.DeletePUB_subscribe)
77: call.DeletePUB_subscribe(&cfg, pub, sess->sess_cid, "%", sess->sess_user, "%");
78: if (call.WipePUB_topic)
79: call.WipePUB_topic(&cfg, pub, sess->sess_cid, sess->sess_user, -1);
80: }
1.2 misho 81:
1.2.2.9 misho 82: while ((store = SLIST_FIRST(&sess->sess_subscr))) {
83: SLIST_REMOVE_HEAD(&sess->sess_subscr, st_node);
84:
85: if (store->st_subscr.sub_topic.msg_base)
86: free(store->st_subscr.sub_topic.msg_base);
87: if (store->st_subscr.sub_value.msg_base)
88: free(store->st_subscr.sub_value.msg_base);
89:
1.2.2.33 misho 90: io_free(store);
1.2.2.9 misho 91: }
1.2 misho 92:
93: if (sess->sess_will.msg)
94: free(sess->sess_will.msg);
95: if (sess->sess_will.topic)
96: free(sess->sess_will.topic);
97:
1.2.2.9 misho 98: if (sess->sess_sock > STDERR_FILENO)
1.2 misho 99: srv_Close(sess->sess_sock);
100:
1.2.2.2 misho 101: mqtt_srv_Fini(&sess->sess_srv);
1.2 misho 102: mqtt_msgFree(&sess->sess_buf, 42);
103:
1.2.2.33 misho 104: io_free(sess);
1.2 misho 105: }
106:
1.2.2.23 misho 107: static void *
108: leaveClient(sched_task_t *task)
1.2 misho 109: {
1.2.2.23 misho 110: struct tagSession *sess;
1.2 misho 111: int ret;
112:
113: ioTRACE(4);
114:
1.2.2.23 misho 115: assert(task);
116:
117: sess = TASK_ARG(task);
1.2 misho 118: assert(sess);
119:
120: TAILQ_REMOVE(&Sessions, sess, sess_node);
121:
1.2.2.23 misho 122: ret = mqtt_msgDISCONNECT(sess->sess_buf);
123: send(TASK_FD(task), sess->sess_buf->msg_base, ret, MSG_NOSIGNAL);
1.2 misho 124:
1.2.2.34 misho 125: ioDEBUG(1, "Close socket=%ld", (long) TASK_FD(task));
1.2 misho 126: call.LOG(logg, "Session %s stopped from %s for user %s.\n", sess->sess_cid,
127: sess->sess_addr, sess->sess_user);
1.2.2.20 misho 128:
129: finiSession(sess);
1.2.2.23 misho 130: return NULL;
1.2 misho 131: }
132:
133: static void *
1.2.2.23 misho 134: dispatchSession(sched_task_t *task)
1.2 misho 135: {
1.2.2.24 misho 136: int ret, len = 0;
1.2.2.23 misho 137: struct tagSession *sess;
1.2 misho 138:
139: ioTRACE(2);
140:
1.2.2.23 misho 141: assert(task);
1.2 misho 142:
1.2.2.23 misho 143: sess = TASK_ARG(task);
144: assert(sess);
145:
146: /* receive & decode packet */
147: if ((ret = recv(TASK_FD(task), sess->sess_buf->msg_base, sess->sess_buf->msg_len, 0)) == -1) {
148: ioDEBUG(3, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
1.2.2.26 misho 149: TAILQ_REMOVE(&Sessions, sess, sess_node);
1.2.2.23 misho 150: finiSession(sess);
151: return NULL;
152: } else if (!ret) {
153: ioDEBUG(4, "Session %s EOF received.", sess->sess_cid);
1.2.2.26 misho 154: TAILQ_REMOVE(&Sessions, sess, sess_node);
1.2.2.23 misho 155: finiSession(sess);
156: return NULL;
1.2.2.24 misho 157: }
1.2.2.38! misho 158: ioDEBUG(0, "++++++ret=%d\n", ret);
1.2.2.23 misho 159:
1.2.2.24 misho 160: do {
161: /* dispatch message type */
1.2.2.25 misho 162: if ((len = mqtt_srv_Dispatch(sess->sess_srv, ret, sess)) < 0) {
1.2.2.27 misho 163: if (len == -1) {
1.2.2.25 misho 164: ioLIBERR(mqtt);
1.2.2.27 misho 165: finiSession(sess);
166: } else if (len == -2) {
167: TAILQ_REMOVE(&Sessions, sess, sess_node);
168: finiSession(sess);
169: } else if (len == -3)
170: schedEvent(root, startSession, NULL, (u_long) TASK_FD(task), sess, ret);
1.2.2.24 misho 171: } else
172: ret -= len;
1.2.2.25 misho 173: } while (len > 0 && ret > 0);
1.2.2.23 misho 174:
1.2.2.25 misho 175: if (len >= 0 && !schedRead(root, dispatchSession, TASK_ARG(task), TASK_FD(task), NULL, 0)) {
1.2.2.23 misho 176: ioLIBERR(sched);
1.2.2.26 misho 177: TAILQ_REMOVE(&Sessions, sess, sess_node);
1.2.2.25 misho 178: finiSession(sess);
179: }
1.2.2.11 misho 180: return NULL;
1.2 misho 181: }
182:
1.2.2.24 misho 183: void *
1.2 misho 184: startSession(sched_task_t *task)
185: {
186: u_char basebuf[USHRT_MAX];
1.2.2.23 misho 187: mqtt_msg_t buf = { basebuf, sizeof basebuf };
1.2 misho 188: mqtthdr_connflgs_t flg;
189: mqtthdr_connack_t cack;
1.2.2.31 misho 190: ait_val_t *v;
1.2 misho 191: struct tagSession *s, *sess = NULL;
1.2.2.23 misho 192: int ret, wlen;
1.2 misho 193:
194: ioTRACE(4);
195:
196: assert(task);
197:
198: if (!TASK_DATA(task)) {
1.2.2.31 misho 199: v = TASK_ARG(task);
1.2.2.8 misho 200: /* flow from accept new clients */
1.2.2.31 misho 201: sess = initSession(TASK_FD(task), v);
202: io_freeVar(&v);
1.2 misho 203: if (!sess) {
204: close(TASK_FD(task));
205: return NULL;
206: }
207:
208: /* receive & decode packet */
209: if (recv(sess->sess_sock, buf.msg_base, buf.msg_len, 0) == -1) {
210: ioDEBUG(3, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
1.2.2.9 misho 211: finiSession(sess);
1.2 misho 212: return NULL;
213: }
214: } else {
215: sess = TASK_DATA(task);
1.2.2.23 misho 216: assert(sess);
217:
1.2 misho 218: buf.msg_len = TASK_DATLEN(task) > sizeof basebuf ? sizeof basebuf : TASK_DATLEN(task);
219: memcpy(buf.msg_base, sess->sess_buf->msg_base, buf.msg_len);
220: }
221:
222: cack = mqtt_readCONNECT(&buf, &sess->sess_ka, sess->sess_cid, sizeof sess->sess_cid,
223: sess->sess_user, sizeof sess->sess_user, sess->sess_pass, sizeof sess->sess_pass,
224: &sess->sess_will.topic, &sess->sess_will.msg);
225: ret = cack.retcode;
226: flg.flags = cack.reserved;
227: if (flg.reserved) {
228: ioDEBUG(3, "Error:: in MQTT protocol #%d - %s", mqtt_GetErrno(), mqtt_GetError());
229: goto end;
230: } else {
231: sess->sess_clean = flg.clean_sess;
232: sess->sess_will.qos = flg.will_qos;
233: sess->sess_will.retain = flg.will_retain;
234: sess->sess_will.flag = flg.will_flg;
1.2.2.28 misho 235:
236: sess->sess_srv->timeout = sess->sess_ka;
1.2 misho 237: }
238:
239: /* check online table for user */
240: if (call.LoginACC(&cfg, acc, sess->sess_user, sess->sess_pass) < 1) {
241: ioDEBUG(0, "Login:: DENIED for username %s and password %s",
242: sess->sess_user, sess->sess_pass);
243: ret = MQTT_RETCODE_DENIED;
244: goto end;
245: } else {
246: ioDEBUG(1, "Login:: ALLOWED for username %s ...", sess->sess_user);
247: ret = MQTT_RETCODE_ACCEPTED;
248: }
1.2.2.12 misho 249:
1.2.2.30 misho 250: /* db management */
1.2 misho 251: if (call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%") > 0) {
252: ioDEBUG(2, "Old session %s should be disconnect!", sess->sess_cid);
253: TAILQ_FOREACH(s, &Sessions, sess_node)
254: if (!strcmp(s->sess_cid, sess->sess_cid)) {
255: /* found stale session & disconnect it! */
1.2.2.36 misho 256: schedCancelby(root, taskMAX, CRITERIA_FD, (void*) s->sess_sock, NULL);
257: schedWrite(root, leaveClient, s, s->sess_sock, NULL, 0);
1.2 misho 258: break;
259: }
260: }
261: if (call.InitSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, sess->sess_addr,
262: sess->sess_will.flag, sess->sess_will.topic, sess->sess_will.msg,
263: sess->sess_will.qos, sess->sess_will.retain) == -1) {
264: ioDEBUG(0, "Session %s DENIED for username %s", sess->sess_cid, sess->sess_user);
265: ret = MQTT_RETCODE_DENIED;
266: goto end;
267: } else {
268: ioDEBUG(0, "Session %s from %s and username %s is started",
269: sess->sess_cid, sess->sess_addr, sess->sess_user);
270: ret = MQTT_RETCODE_ACCEPTED;
271: }
1.2.2.30 misho 272: /* clean/load session if requested */
273: if (sess->sess_clean) {
274: if (call.DeletePUB_subscribe)
275: call.DeletePUB_subscribe(&cfg, pub, sess->sess_cid, "%", sess->sess_user, "%");
276: if (call.WipePUB_topic)
277: call.WipePUB_topic(&cfg, pub, sess->sess_cid, sess->sess_user, -1);
278: } else {
1.2.2.37 misho 279: // TODO: read_sql subs and prepare publish
1.2.2.30 misho 280: }
1.2 misho 281:
1.2.2.25 misho 282: /* Start session task OK ... */
283: if (!schedRead(root, dispatchSession, sess, TASK_FD(task), NULL, 0)) {
1.2.2.23 misho 284: ioLIBERR(sched);
1.2.2.25 misho 285: ret = MQTT_RETCODE_DENIED;
1.2.2.26 misho 286: } else
287: TAILQ_INSERT_TAIL(&Sessions, sess, sess_node);
1.2.2.23 misho 288:
1.2 misho 289: call.LOG(logg, "Session %s started from %s for user %s (timeout=%d) OK!\n", sess->sess_cid,
290: sess->sess_addr, sess->sess_user, sess->sess_ka);
291: end: /* close client connection */
1.2.2.23 misho 292: wlen = mqtt_msgCONNACK(sess->sess_buf, ret);
293: if ((wlen = send(TASK_FD(task), sess->sess_buf->msg_base, wlen, 0)) == -1) {
1.2.2.34 misho 294: ioDEBUG(3, "Error:: send(%ld) #%d - %s", (long) TASK_FD(task), errno, strerror(errno));
1.2.2.23 misho 295: } else
296: ioDEBUG(5, "Sended %d bytes", wlen);
1.2 misho 297:
1.2.2.23 misho 298: if (ret != MQTT_RETCODE_ACCEPTED) {
1.2.2.34 misho 299: ioDEBUG(1, "Close client %s with socket=%ld", sess->sess_addr, (long) TASK_FD(task));
1.2.2.23 misho 300: finiSession(sess);
301: }
1.2 misho 302: return NULL;
303: }
304:
305: static void *
1.2.2.9 misho 306: acceptClient(sched_task_t *task)
1.2 misho 307: {
1.2.2.9 misho 308: int cli;
309: io_sockaddr_t sa;
310: socklen_t sslen = sizeof sa.ss;
311: ait_val_t *v;
312: char str[STRSIZ];
1.2 misho 313:
1.2.2.9 misho 314: ioTRACE(4);
1.2 misho 315:
1.2.2.9 misho 316: assert(task);
1.2 misho 317:
1.2.2.9 misho 318: if ((cli = accept(TASK_FD(task), &sa.sa, &sslen)) == -1)
319: goto end;
320: else
1.2.2.21 misho 321: fcntl(cli, F_SETFL, fcntl(cli, F_GETFL, 0) | O_NONBLOCK);
1.2.2.9 misho 322:
323: v = io_allocVar();
324: if (!v) {
325: ioLIBERR(io);
326: close(cli);
327: goto end;
328: } else {
329: memset(str, 0, sizeof str);
330: snprintf(str, sizeof str, "%s:%hu", io_n2addr(&sa, v), io_n2port(&sa));
1.2.2.17 misho 331: AIT_FREE_VAL(v);
1.2.2.9 misho 332: AIT_SET_STR(v, str);
333: }
334: ioDEBUG(1, "Connected client with socket=%d from %s", cli, AIT_GET_STR(v));
335:
336: if (!schedRead(root, startSession, v, cli, NULL, 0)) {
1.2.2.31 misho 337: io_freeVar(&v);
1.2.2.9 misho 338: close(cli);
339: ioDEBUG(1, "Terminated client with socket=%d", cli);
340: }
341: end:
1.2.2.22 misho 342: if (!schedRead(root, acceptClient, NULL, TASK_FD(task), NULL, 0))
1.2.2.11 misho 343: ioLIBERR(sched);
1.2.2.9 misho 344: return NULL;
1.2 misho 345: }
346:
1.2.2.9 misho 347: /* ----------------------------------------------------------------------- */
348:
1.2 misho 349: int
350: Run(int sock)
351: {
1.2.2.25 misho 352: struct tagSession *sess;
1.2.2.9 misho 353: struct timespec pl = { 0, 100000000 };
1.2 misho 354:
355: ioTRACE(1);
356:
1.2.2.9 misho 357: if (listen(sock, SOMAXCONN) == -1) {
1.2 misho 358: ioSYSERR(0);
359: return -1;
360: } else
1.2.2.9 misho 361: fcntl(sock, F_SETFL, fcntl(sock, F_GETFL, 0) | O_NONBLOCK);
1.2 misho 362:
1.2.2.9 misho 363: /* state machine - accept new connections */
364: if (!schedRead(root, acceptClient, NULL, sock, NULL, 0)) {
365: ioLIBERR(sched);
1.2 misho 366: return -1;
367: }
368:
1.2.2.9 misho 369: schedPolling(root, &pl, NULL);
370: schedRun(root, &Kill);
1.2 misho 371:
1.2.2.9 misho 372: /* free all undeleted elements into lists */
1.2.2.25 misho 373: TAILQ_FOREACH(sess, &Sessions, sess_node) {
374: TAILQ_REMOVE(&Sessions, sess, sess_node);
1.2.2.26 misho 375:
1.2.2.25 misho 376: finiSession(sess);
377: }
1.2 misho 378: return 0;
379: }
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