Annotation of mqtt/src/daemon.c, revision 1.2.2.30
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:
19: sess = malloc(sizeof(struct tagSession));
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 misho 37: free(sess);
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);
46: free(sess);
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:
90: free(store);
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:
104: free(sess);
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:
1.2.2.23 misho 125: ioDEBUG(1, "Close socket=%d", 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: }
1.2.2.23 misho 158:
1.2.2.24 misho 159: do {
160: /* dispatch message type */
1.2.2.25 misho 161: if ((len = mqtt_srv_Dispatch(sess->sess_srv, ret, sess)) < 0) {
1.2.2.27 misho 162: if (len == -1) {
1.2.2.25 misho 163: ioLIBERR(mqtt);
1.2.2.27 misho 164: finiSession(sess);
165: } else if (len == -2) {
166: TAILQ_REMOVE(&Sessions, sess, sess_node);
167: finiSession(sess);
168: } else if (len == -3)
169: schedEvent(root, startSession, NULL, (u_long) TASK_FD(task), sess, ret);
1.2.2.24 misho 170: } else
171: ret -= len;
1.2.2.25 misho 172: } while (len > 0 && ret > 0);
1.2.2.23 misho 173:
1.2.2.25 misho 174: if (len >= 0 && !schedRead(root, dispatchSession, TASK_ARG(task), TASK_FD(task), NULL, 0)) {
1.2.2.23 misho 175: ioLIBERR(sched);
1.2.2.26 misho 176: TAILQ_REMOVE(&Sessions, sess, sess_node);
1.2.2.25 misho 177: finiSession(sess);
178: }
1.2.2.11 misho 179: return NULL;
1.2 misho 180: }
181:
1.2.2.24 misho 182: void *
1.2 misho 183: startSession(sched_task_t *task)
184: {
185: u_char basebuf[USHRT_MAX];
1.2.2.23 misho 186: mqtt_msg_t buf = { basebuf, sizeof basebuf };
1.2 misho 187: mqtthdr_connflgs_t flg;
188: mqtthdr_connack_t cack;
189: struct tagSession *s, *sess = NULL;
1.2.2.23 misho 190: int ret, wlen;
1.2 misho 191:
192: ioTRACE(4);
193:
194: assert(task);
195:
196: if (!TASK_DATA(task)) {
1.2.2.8 misho 197: /* flow from accept new clients */
1.2 misho 198: sess = initSession(TASK_FD(task), TASK_ARG(task));
1.2.2.17 misho 199: io_freeVar(TASK_ARG(task));
1.2 misho 200: if (!sess) {
201: close(TASK_FD(task));
202: return NULL;
203: }
204:
205: /* receive & decode packet */
206: if (recv(sess->sess_sock, buf.msg_base, buf.msg_len, 0) == -1) {
207: ioDEBUG(3, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
1.2.2.9 misho 208: finiSession(sess);
1.2 misho 209: return NULL;
210: }
211: } else {
212: sess = TASK_DATA(task);
1.2.2.23 misho 213: assert(sess);
214:
1.2 misho 215: buf.msg_len = TASK_DATLEN(task) > sizeof basebuf ? sizeof basebuf : TASK_DATLEN(task);
216: memcpy(buf.msg_base, sess->sess_buf->msg_base, buf.msg_len);
217: }
218:
219: cack = mqtt_readCONNECT(&buf, &sess->sess_ka, sess->sess_cid, sizeof sess->sess_cid,
220: sess->sess_user, sizeof sess->sess_user, sess->sess_pass, sizeof sess->sess_pass,
221: &sess->sess_will.topic, &sess->sess_will.msg);
222: ret = cack.retcode;
223: flg.flags = cack.reserved;
224: if (flg.reserved) {
225: ioDEBUG(3, "Error:: in MQTT protocol #%d - %s", mqtt_GetErrno(), mqtt_GetError());
226: goto end;
227: } else {
228: sess->sess_clean = flg.clean_sess;
229: sess->sess_will.qos = flg.will_qos;
230: sess->sess_will.retain = flg.will_retain;
231: sess->sess_will.flag = flg.will_flg;
1.2.2.28 misho 232:
233: sess->sess_srv->timeout = sess->sess_ka;
1.2 misho 234: }
235:
236: /* check online table for user */
237: if (call.LoginACC(&cfg, acc, sess->sess_user, sess->sess_pass) < 1) {
238: ioDEBUG(0, "Login:: DENIED for username %s and password %s",
239: sess->sess_user, sess->sess_pass);
240: ret = MQTT_RETCODE_DENIED;
241: goto end;
242: } else {
243: ioDEBUG(1, "Login:: ALLOWED for username %s ...", sess->sess_user);
244: ret = MQTT_RETCODE_ACCEPTED;
245: }
1.2.2.12 misho 246:
1.2.2.30! misho 247: /* db management */
1.2 misho 248: if (call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%") > 0) {
249: ioDEBUG(2, "Old session %s should be disconnect!", sess->sess_cid);
250: TAILQ_FOREACH(s, &Sessions, sess_node)
251: if (!strcmp(s->sess_cid, sess->sess_cid)) {
252: /* found stale session & disconnect it! */
1.2.2.23 misho 253: schedWrite(root, leaveClient, sess, TASK_FD(task), NULL, 0);
1.2 misho 254: break;
255: }
256: }
257: if (call.InitSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, sess->sess_addr,
258: sess->sess_will.flag, sess->sess_will.topic, sess->sess_will.msg,
259: sess->sess_will.qos, sess->sess_will.retain) == -1) {
260: ioDEBUG(0, "Session %s DENIED for username %s", sess->sess_cid, sess->sess_user);
261: ret = MQTT_RETCODE_DENIED;
262: goto end;
263: } else {
264: ioDEBUG(0, "Session %s from %s and username %s is started",
265: sess->sess_cid, sess->sess_addr, sess->sess_user);
266: ret = MQTT_RETCODE_ACCEPTED;
267: }
1.2.2.30! misho 268: /* clean/load session if requested */
! 269: if (sess->sess_clean) {
! 270: if (call.DeletePUB_subscribe)
! 271: call.DeletePUB_subscribe(&cfg, pub, sess->sess_cid, "%", sess->sess_user, "%");
! 272: if (call.WipePUB_topic)
! 273: call.WipePUB_topic(&cfg, pub, sess->sess_cid, sess->sess_user, -1);
! 274: } else {
! 275: // todo: read_sql subs and prepare publish
! 276: }
1.2 misho 277:
1.2.2.25 misho 278: /* Start session task OK ... */
279: if (!schedRead(root, dispatchSession, sess, TASK_FD(task), NULL, 0)) {
1.2.2.23 misho 280: ioLIBERR(sched);
1.2.2.25 misho 281: ret = MQTT_RETCODE_DENIED;
1.2.2.26 misho 282: } else
283: TAILQ_INSERT_TAIL(&Sessions, sess, sess_node);
1.2.2.23 misho 284:
1.2 misho 285: call.LOG(logg, "Session %s started from %s for user %s (timeout=%d) OK!\n", sess->sess_cid,
286: sess->sess_addr, sess->sess_user, sess->sess_ka);
287: end: /* close client connection */
1.2.2.23 misho 288: wlen = mqtt_msgCONNACK(sess->sess_buf, ret);
289: if ((wlen = send(TASK_FD(task), sess->sess_buf->msg_base, wlen, 0)) == -1) {
290: ioDEBUG(3, "Error:: send(%d) #%d - %s", TASK_FD(task), errno, strerror(errno));
291: } else
292: ioDEBUG(5, "Sended %d bytes", wlen);
1.2 misho 293:
1.2.2.23 misho 294: if (ret != MQTT_RETCODE_ACCEPTED) {
295: ioDEBUG(1, "Close client %s with socket=%d", sess->sess_addr, TASK_FD(task));
296: finiSession(sess);
297: }
1.2 misho 298: return NULL;
299: }
300:
301: static void *
1.2.2.9 misho 302: acceptClient(sched_task_t *task)
1.2 misho 303: {
1.2.2.9 misho 304: int cli;
305: io_sockaddr_t sa;
306: socklen_t sslen = sizeof sa.ss;
307: ait_val_t *v;
308: char str[STRSIZ];
1.2 misho 309:
1.2.2.9 misho 310: ioTRACE(4);
1.2 misho 311:
1.2.2.9 misho 312: assert(task);
1.2 misho 313:
1.2.2.9 misho 314: if ((cli = accept(TASK_FD(task), &sa.sa, &sslen)) == -1)
315: goto end;
316: else
1.2.2.21 misho 317: fcntl(cli, F_SETFL, fcntl(cli, F_GETFL, 0) | O_NONBLOCK);
1.2.2.9 misho 318:
319: v = io_allocVar();
320: if (!v) {
321: ioLIBERR(io);
322: close(cli);
323: goto end;
324: } else {
325: memset(str, 0, sizeof str);
326: snprintf(str, sizeof str, "%s:%hu", io_n2addr(&sa, v), io_n2port(&sa));
1.2.2.17 misho 327: AIT_FREE_VAL(v);
1.2.2.9 misho 328: AIT_SET_STR(v, str);
329: }
330: ioDEBUG(1, "Connected client with socket=%d from %s", cli, AIT_GET_STR(v));
331:
332: if (!schedRead(root, startSession, v, cli, NULL, 0)) {
333: io_freeVar(v);
334: close(cli);
335: ioDEBUG(1, "Terminated client with socket=%d", cli);
336: }
337: end:
1.2.2.22 misho 338: if (!schedRead(root, acceptClient, NULL, TASK_FD(task), NULL, 0))
1.2.2.11 misho 339: ioLIBERR(sched);
1.2.2.9 misho 340: return NULL;
1.2 misho 341: }
342:
1.2.2.9 misho 343: /* ----------------------------------------------------------------------- */
344:
1.2 misho 345: int
346: Run(int sock)
347: {
1.2.2.9 misho 348: struct tagPub *pub;
1.2.2.25 misho 349: struct tagSession *sess;
1.2.2.9 misho 350: struct timespec pl = { 0, 100000000 };
1.2 misho 351:
352: ioTRACE(1);
353:
1.2.2.9 misho 354: if (listen(sock, SOMAXCONN) == -1) {
1.2 misho 355: ioSYSERR(0);
356: return -1;
357: } else
1.2.2.9 misho 358: fcntl(sock, F_SETFL, fcntl(sock, F_GETFL, 0) | O_NONBLOCK);
1.2 misho 359:
1.2.2.9 misho 360: /* state machine - accept new connections */
361: if (!schedRead(root, acceptClient, NULL, sock, NULL, 0)) {
362: ioLIBERR(sched);
1.2 misho 363: return -1;
364: }
365:
1.2.2.9 misho 366: schedPolling(root, &pl, NULL);
367: schedRun(root, &Kill);
1.2 misho 368:
1.2.2.9 misho 369: /* free all undeleted elements into lists */
370: TAILQ_FOREACH(pub, &Pubs, pub_node) {
371: TAILQ_REMOVE(&Pubs, pub, pub_node);
372:
373: AIT_FREE_VAL(&pub->pub_name);
374: if (pub->pub_packet.msg_base)
375: free(pub->pub_packet.msg_base);
1.2 misho 376: }
1.2.2.25 misho 377: TAILQ_FOREACH(sess, &Sessions, sess_node) {
378: TAILQ_REMOVE(&Sessions, sess, sess_node);
1.2.2.26 misho 379:
1.2.2.25 misho 380: finiSession(sess);
381: }
1.2 misho 382: return 0;
383: }
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