Annotation of mqtt/src/daemon.c, revision 1.3
1.2 misho 1: #include "global.h"
2: #include "rtlm.h"
3: #include "mqttd.h"
4: #include "mqttd_calls.h"
1.3 ! misho 5: #include "utils.h"
1.2 misho 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:
1.3 ! misho 19: sess = io_malloc(sizeof(struct tagSession));
1.2 misho 20: if (!sess) {
1.3 ! misho 21: ioSYSERR(0);
1.2 misho 22: return NULL;
23: } else
24: memset(sess, 0, sizeof(struct tagSession));
25:
1.3 ! misho 26: SLIST_INIT(&sess->sess_subscr);
1.2 misho 27:
1.3 ! 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) {
1.3 ! misho 36: ioLIBERR(mqtt);
! 37: io_free(sess);
1.2 misho 38: return NULL;
39: }
40:
1.3 ! misho 41: /* init server actor */
! 42: sess->sess_srv = mqtt_srv_cliInit(sock, sess->sess_buf, sess->sess_ka, 1);
! 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: io_free(sess);
! 47: return NULL;
! 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);
! 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:
63: static void
1.3 ! 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:
1.3 ! misho 73: schedCancelby(root, taskTIMER, CRITERIA_CALL, sendRetain, NULL);
1.2 misho 74:
1.3 ! misho 75: if (sess->sess_clean) {
! 76: if (call.FiniSessPUB)
! 77: call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%");
! 78: if (call.DeletePUB_subscribe)
! 79: call.DeletePUB_subscribe(&cfg, pub, sess->sess_cid, "%", sess->sess_user, "%");
! 80: if (call.WipePUB_topic) /* only dynamic messages */
! 81: call.WipePUB_topic(&cfg, pub, sess->sess_cid, sess->sess_user, 0);
! 82: }
! 83:
! 84: while ((store = SLIST_FIRST(&sess->sess_subscr))) {
! 85: SLIST_REMOVE_HEAD(&sess->sess_subscr, st_node);
1.2 misho 86:
1.3 ! misho 87: if (store->st_subscr.sub_topic.msg_base)
! 88: free(store->st_subscr.sub_topic.msg_base);
! 89: if (store->st_subscr.sub_value.msg_base)
! 90: free(store->st_subscr.sub_value.msg_base);
1.2 misho 91:
1.3 ! misho 92: io_free(store);
1.2 misho 93: }
94:
1.3 ! misho 95: if (sess->sess_will.flag)
! 96: pubWill(sess);
! 97:
! 98: if (sess->sess_will.topic)
! 99: free(sess->sess_will.topic);
1.2 misho 100: if (sess->sess_will.msg)
101: free(sess->sess_will.msg);
102:
1.3 ! misho 103: if (sess->sess_sock > STDERR_FILENO)
1.2 misho 104: srv_Close(sess->sess_sock);
105:
1.3 ! misho 106: mqtt_srv_cliFini(&sess->sess_srv);
1.2 misho 107: mqtt_msgFree(&sess->sess_buf, 42);
108:
1.3 ! misho 109: io_free(sess);
1.2 misho 110: }
111:
1.3 ! misho 112: static void *
! 113: leaveClient(sched_task_t *task)
1.2 misho 114: {
1.3 ! misho 115: struct tagSession *sess;
1.2 misho 116: int ret;
117:
118: ioTRACE(4);
119:
1.3 ! misho 120: assert(task);
! 121:
! 122: sess = TASK_ARG(task);
1.2 misho 123: assert(sess);
124:
125: TAILQ_REMOVE(&Sessions, sess, sess_node);
126:
1.3 ! misho 127: ret = mqtt_msgDISCONNECT(sess->sess_buf);
! 128: send(TASK_FD(task), sess->sess_buf->msg_base, ret, MSG_NOSIGNAL);
1.2 misho 129:
1.3 ! misho 130: ioDEBUG(1, "Close socket=%ld", (long) TASK_FD(task));
1.2 misho 131: call.LOG(logg, "Session %s stopped from %s for user %s.\n", sess->sess_cid,
132: sess->sess_addr, sess->sess_user);
1.3 ! misho 133:
! 134: finiSession(sess);
! 135: return NULL;
1.2 misho 136: }
137:
1.3 ! misho 138: static void *
! 139: dispatchSession(sched_task_t *task)
1.2 misho 140: {
1.3 ! misho 141: int ret, len = 0;
! 142: struct tagSession *sess;
! 143:
! 144: ioTRACE(2);
1.2 misho 145:
1.3 ! misho 146: assert(task);
1.2 misho 147:
1.3 ! misho 148: sess = TASK_ARG(task);
1.2 misho 149: assert(sess);
150:
151: /* receive & decode packet */
1.3 ! misho 152: if ((ret = recv(TASK_FD(task), sess->sess_buf->msg_base, sess->sess_buf->msg_len, 0)) == -1) {
1.2 misho 153: ioDEBUG(3, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
1.3 ! misho 154: TAILQ_REMOVE(&Sessions, sess, sess_node);
! 155: finiSession(sess);
! 156: return NULL;
! 157: } else if (!ret) {
! 158: ioDEBUG(4, "Session %s EOF received.", sess->sess_cid);
! 159: TAILQ_REMOVE(&Sessions, sess, sess_node);
! 160: finiSession(sess);
! 161: return NULL;
1.2 misho 162: }
1.3 ! misho 163:
! 164: do {
! 165: /* dispatch message type */
! 166: if ((len = mqtt_srv_cliDispatch(sess->sess_srv, ret, sess)) < 0) {
! 167: if (len == -1) {
! 168: ioLIBERR(mqtt);
! 169: finiSession(sess);
! 170: } else if (len == -2) {
! 171: TAILQ_REMOVE(&Sessions, sess, sess_node);
! 172: finiSession(sess);
! 173: } else if (len == -3)
! 174: schedEvent(root, startSession, NULL, (u_long) TASK_FD(task), sess, ret);
! 175: } else
! 176: ret -= len;
! 177: } while (len > 0 && ret > 0);
! 178:
! 179: if (len >= 0 && !schedRead(root, dispatchSession, TASK_ARG(task), TASK_FD(task), NULL, 0)) {
! 180: ioLIBERR(sched);
! 181: TAILQ_REMOVE(&Sessions, sess, sess_node);
! 182: finiSession(sess);
1.2 misho 183: }
1.3 ! misho 184: return NULL;
1.2 misho 185: }
186:
1.3 ! misho 187: static int
! 188: loadSubscribes(struct tagSession * __restrict sess, mqtt_subscr_t * __restrict subs)
1.2 misho 189: {
1.3 ! misho 190: register int i;
1.2 misho 191: struct tagStore *store;
192:
1.3 ! misho 193: if (!subs)
! 194: return -1;
1.2 misho 195:
1.3 ! misho 196: for (i = 0; subs[i].sub_topic.msg_base; i++) {
! 197: store = io_malloc(sizeof(struct tagStore));
! 198: if (!store) {
! 199: ioSYSERR(0);
! 200: continue;
! 201: } else {
! 202: store->st_msgid = 0;
! 203: mqtt_subCopy(&store->st_subscr, &subs[i]);
1.2 misho 204: }
205:
1.3 ! misho 206: /* add to cache */
! 207: SLIST_INSERT_HEAD(&sess->sess_subscr, store, st_node);
1.2 misho 208: }
209:
1.3 ! misho 210: return 0;
1.2 misho 211: }
212:
1.3 ! misho 213: void *
1.2 misho 214: startSession(sched_task_t *task)
215: {
216: u_char basebuf[USHRT_MAX];
1.3 ! misho 217: mqtt_msg_t buf = { basebuf, sizeof basebuf };
1.2 misho 218: mqtthdr_connflgs_t flg;
219: mqtthdr_connack_t cack;
1.3 ! misho 220: ait_val_t *v;
1.2 misho 221: struct tagSession *s, *sess = NULL;
1.3 ! misho 222: int ret, wlen;
! 223: mqtt_subscr_t *subs;
! 224: struct timespec ts = { RETAIN_TIMEOUT, 0 };
! 225: intptr_t sock;
1.2 misho 226:
227: ioTRACE(4);
228:
229: assert(task);
230:
231: if (!TASK_DATA(task)) {
1.3 ! misho 232: v = TASK_ARG(task);
! 233: /* flow from accept new clients */
! 234: sess = initSession(TASK_FD(task), v);
! 235: io_freeVar(&v);
1.2 misho 236: if (!sess) {
237: close(TASK_FD(task));
238: return NULL;
239: }
240:
241: /* receive & decode packet */
242: if (recv(sess->sess_sock, buf.msg_base, buf.msg_len, 0) == -1) {
243: ioDEBUG(3, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
1.3 ! misho 244: finiSession(sess);
1.2 misho 245: return NULL;
246: }
247: } else {
248: sess = TASK_DATA(task);
1.3 ! misho 249: assert(sess);
! 250:
1.2 misho 251: buf.msg_len = TASK_DATLEN(task) > sizeof basebuf ? sizeof basebuf : TASK_DATLEN(task);
252: memcpy(buf.msg_base, sess->sess_buf->msg_base, buf.msg_len);
253: }
254:
255: cack = mqtt_readCONNECT(&buf, &sess->sess_ka, sess->sess_cid, sizeof sess->sess_cid,
256: sess->sess_user, sizeof sess->sess_user, sess->sess_pass, sizeof sess->sess_pass,
257: &sess->sess_will.topic, &sess->sess_will.msg);
258: ret = cack.retcode;
259: flg.flags = cack.reserved;
260: if (flg.reserved) {
261: ioDEBUG(3, "Error:: in MQTT protocol #%d - %s", mqtt_GetErrno(), mqtt_GetError());
262: goto end;
263: } else {
264: sess->sess_clean = flg.clean_sess;
265: sess->sess_will.qos = flg.will_qos;
266: sess->sess_will.retain = flg.will_retain;
267: sess->sess_will.flag = flg.will_flg;
1.3 ! misho 268:
! 269: sess->sess_srv->timeout = sess->sess_ka;
1.2 misho 270: }
271:
272: /* check online table for user */
273: if (call.LoginACC(&cfg, acc, sess->sess_user, sess->sess_pass) < 1) {
274: ioDEBUG(0, "Login:: DENIED for username %s and password %s",
275: sess->sess_user, sess->sess_pass);
276: ret = MQTT_RETCODE_DENIED;
277: goto end;
278: } else {
279: ioDEBUG(1, "Login:: ALLOWED for username %s ...", sess->sess_user);
280: ret = MQTT_RETCODE_ACCEPTED;
281: }
1.3 ! misho 282:
! 283: /* db management */
1.2 misho 284: if (call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%") > 0) {
285: ioDEBUG(2, "Old session %s should be disconnect!", sess->sess_cid);
286: TAILQ_FOREACH(s, &Sessions, sess_node)
287: if (!strcmp(s->sess_cid, sess->sess_cid)) {
288: /* found stale session & disconnect it! */
1.3 ! misho 289: sock = s->sess_sock;
! 290: schedCancelby(root, taskMAX, CRITERIA_FD, (void*) sock, NULL);
! 291: schedWrite(root, leaveClient, s, s->sess_sock, NULL, 0);
1.2 misho 292: break;
293: }
294: }
295: if (call.InitSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, sess->sess_addr,
296: sess->sess_will.flag, sess->sess_will.topic, sess->sess_will.msg,
297: sess->sess_will.qos, sess->sess_will.retain) == -1) {
298: ioDEBUG(0, "Session %s DENIED for username %s", sess->sess_cid, sess->sess_user);
299: ret = MQTT_RETCODE_DENIED;
300: goto end;
301: } else {
302: ioDEBUG(0, "Session %s from %s and username %s is started",
303: sess->sess_cid, sess->sess_addr, sess->sess_user);
304: ret = MQTT_RETCODE_ACCEPTED;
305: }
1.3 ! misho 306: /* clean/load session if requested */
! 307: if (sess->sess_clean) {
! 308: if (call.DeletePUB_subscribe)
! 309: call.DeletePUB_subscribe(&cfg, pub, sess->sess_cid, "%", sess->sess_user, "%");
! 310: if (call.WipePUB_topic) /* delete ALL messages */
! 311: call.WipePUB_topic(&cfg, pub, sess->sess_cid, sess->sess_user, -1);
! 312: } else if (call.ReadPUB_subscribe) {
! 313: /* load subscribes */
! 314: subs = call.ReadPUB_subscribe(&cfg, pub, sess->sess_cid, "%");
! 315: loadSubscribes(sess, subs);
! 316: mqtt_subFree(&subs);
! 317: }
! 318:
! 319: /* timer event for retain messages */
! 320: if (call.ReadPUB_topic)
! 321: schedTimer(root, sendRetain, sess, ts, NULL, 0);
! 322:
! 323: /* Start session task OK ... */
! 324: if (!schedRead(root, dispatchSession, sess, TASK_FD(task), NULL, 0)) {
! 325: ioLIBERR(sched);
! 326: ret = MQTT_RETCODE_DENIED;
! 327: } else
! 328: TAILQ_INSERT_TAIL(&Sessions, sess, sess_node);
1.2 misho 329:
330: call.LOG(logg, "Session %s started from %s for user %s (timeout=%d) OK!\n", sess->sess_cid,
331: sess->sess_addr, sess->sess_user, sess->sess_ka);
1.3 ! misho 332: end: /* close client connection */
! 333: wlen = mqtt_msgCONNACK(sess->sess_buf, ret);
! 334: if ((wlen = send(TASK_FD(task), sess->sess_buf->msg_base, wlen, 0)) == -1) {
! 335: ioDEBUG(3, "Error:: send(%ld) #%d - %s", (long) TASK_FD(task), errno, strerror(errno));
! 336: } else
! 337: ioDEBUG(5, "Sended %d bytes", wlen);
1.2 misho 338:
1.3 ! misho 339: if (ret != MQTT_RETCODE_ACCEPTED) {
! 340: ioDEBUG(1, "Close client %s with socket=%ld", sess->sess_addr, (long) TASK_FD(task));
! 341: finiSession(sess);
1.2 misho 342: }
343: return NULL;
344: }
345:
346: static void *
1.3 ! misho 347: acceptClient(sched_task_t *task)
1.2 misho 348: {
1.3 ! misho 349: int cli;
! 350: io_sockaddr_t sa;
! 351: socklen_t sslen = sizeof sa.ss;
! 352: ait_val_t *v;
! 353: char str[STRSIZ];
! 354:
! 355: ioTRACE(4);
1.2 misho 356:
1.3 ! misho 357: assert(task);
1.2 misho 358:
1.3 ! misho 359: if ((cli = accept(TASK_FD(task), &sa.sa, &sslen)) == -1)
! 360: goto end;
1.2 misho 361:
1.3 ! misho 362: v = io_allocVar();
! 363: if (!v) {
! 364: ioLIBERR(io);
! 365: close(cli);
! 366: goto end;
! 367: } else {
! 368: memset(str, 0, sizeof str);
! 369: snprintf(str, sizeof str, "%s:%hu", io_n2addr(&sa, v), io_n2port(&sa));
! 370: AIT_FREE_VAL(v);
! 371: AIT_SET_STR(v, str);
! 372: }
! 373: ioDEBUG(1, "Connected client with socket=%d from %s", cli, AIT_GET_STR(v));
! 374:
! 375: if (!schedRead(root, startSession, v, cli, NULL, 0)) {
! 376: io_freeVar(&v);
! 377: close(cli);
! 378: ioDEBUG(1, "Terminated client with socket=%d", cli);
! 379: }
! 380: end:
! 381: if (!schedRead(root, acceptClient, NULL, TASK_FD(task), NULL, 0))
! 382: ioLIBERR(sched);
! 383: return NULL;
1.2 misho 384: }
385:
1.3 ! misho 386: /* ----------------------------------------------------------------------- */
! 387:
1.2 misho 388: int
389: Run(int sock)
390: {
1.3 ! misho 391: struct tagSession *sess;
! 392: struct timespec pl = { 0, 100000000 };
1.2 misho 393:
394: ioTRACE(1);
395:
1.3 ! misho 396: if (mqtt_srv_Listen(sock, 0, 1) == -1) {
! 397: ioLIBERR(mqtt);
1.2 misho 398: return -1;
1.3 ! misho 399: }
1.2 misho 400:
1.3 ! misho 401: /* state machine - accept new connections */
! 402: if (!schedRead(root, acceptClient, NULL, sock, NULL, 0)) {
! 403: ioLIBERR(sched);
1.2 misho 404: return -1;
405: }
406:
1.3 ! misho 407: schedPolling(root, &pl, NULL);
! 408: schedRun(root, &Kill);
! 409:
! 410: schedCancelby(root, taskTIMER, CRITERIA_CALL, sendRetain, NULL);
! 411:
! 412: /* free all undeleted elements into lists */
! 413: TAILQ_FOREACH(sess, &Sessions, sess_node) {
! 414: TAILQ_REMOVE(&Sessions, sess, sess_node);
1.2 misho 415:
1.3 ! misho 416: finiSession(sess);
1.2 misho 417: }
418: return 0;
419: }
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