1: #include "global.h"
2: #include "mqttd.h"
3: #include "utils.h"
4: #include "rtlm.h"
5: #include "mqttd_calls.h"
6:
7:
8: static inline ait_val_t *
9: mkPkt(void * __restrict data, int dlen)
10: {
11: ait_val_t *p = NULL;
12:
13: if (!(p = io_allocVar())) {
14: ioDEBUG(7, "Error:: in send packet prepare #%d - %s", io_GetErrno(), io_GetError());
15: return NULL;
16: }
17:
18: if (data && dlen > 0)
19: AIT_SET_BUF(p, data, dlen);
20:
21: return p;
22: }
23:
24: static inline void
25: freePkt(ait_val_t ** __restrict p)
26: {
27: if (!p)
28: return;
29:
30: io_freeVar(p);
31: }
32:
33: static void *
34: sendPacket(sched_task_t *task)
35: {
36: ait_val_t *p = TASK_ARG(task);
37: register int n, slen;
38: u_char *pos;
39:
40: if (!p || AIT_ISEMPTY(p)) {
41: ioDEBUG(9, "Error:: invalid packet or found empty content ...");
42: return NULL;
43: }
44:
45: ioDEBUG(7, "Send packet length %d for socket %d\n", AIT_LEN(p), (u_int) TASK_FD(task));
46:
47: for (slen = AIT_LEN(p), pos = AIT_GET_BUF(p); slen > 0; slen -= n, pos += n) {
48: n = send(TASK_FD(task), pos, slen, MSG_NOSIGNAL);
49: if (n == -1) {
50: ioSYSERR(0);
51: break;
52: }
53: }
54:
55: freePkt(&p);
56: return NULL;
57: }
58:
59: static int
60: search4send(struct tagSession * __restrict sess, const char *topic, int datlen, char qos)
61: {
62: regex_t re;
63: regmatch_t match;
64: ait_val_t *p = NULL;
65: struct tagSession *s = NULL;
66: struct tagStore *st_, *st = NULL;
67: char szStr[STRSIZ];
68: int ret;
69:
70: assert(sess);
71:
72: TAILQ_FOREACH(s, &Sessions, sess_node) {
73: SLIST_FOREACH_SAFE(st, &s->sess_subscr, st_node, st_) {
74: /* check for QoS */
75: if (st->st_subscr.sub_ret >= qos) {
76: if ((ret = regcomp(&re, st->st_subscr.sub_topic.msg_base, REG_EXTENDED))) {
77: regerror(ret, &re, szStr, sizeof szStr);
78: regfree(&re);
79: ioDEBUG(3, "Error:: regcomp(%s) %s\n", (char*)
80: st->st_subscr.sub_topic.msg_base, szStr);
81: }
82: if (!regexec(&re, topic, 1, &match, 0)) {
83: /* MATCH */
84: p = mkPkt(sess->sess_buf->msg_base, datlen);
85: schedWrite(root, sendPacket, p, s->sess_sock, NULL, 0);
86: }
87:
88: regfree(&re);
89: }
90: }
91: }
92:
93: return 0;
94: }
95:
96: /* --------------------------------------------------- */
97:
98: void *
99: sendRetain(sched_task_t *task)
100: {
101: mqtt_subscr_t *subs, *s;
102: struct tagSession *sess;
103: int siz;
104:
105: ioTRACE(2);
106:
107: assert(task);
108:
109: sess = TASK_ARG(task);
110: assert(sess);
111:
112: if (!sess->sess_buf) {
113: ioDEBUG(9, "WARNING! No allocated buffer!?!\n");
114: return NULL;
115: }
116:
117: subs = call.ReadPUB_topic(&cfg, pub, "%", "%", 1);
118: if (!subs)
119: return NULL;
120:
121: for (s = subs; s && s->sub_topic.msg_base; s++) {
122: siz = s->sub_value.msg_len;
123: memcpy(sess->sess_buf->msg_base, s->sub_value.msg_base,
124: MIN(sess->sess_buf->msg_len, s->sub_value.msg_len));
125: ioDEBUG(7, "Sending retain message %d bytes, QoS %hhd topic '%s' data length %d\n",
126: siz, s->sub_ret, (char*) s->sub_topic.msg_base, s->sub_value.msg_len);
127: if (siz > 0)
128: search4send(sess, s->sub_topic.msg_base, siz, s->sub_ret);
129: }
130:
131: mqtt_subFree(&subs);
132: return NULL;
133: }
134:
135: int
136: pubWill(struct tagSession * __restrict sess)
137: {
138: int datlen;
139:
140: ioTRACE(2);
141:
142: /* prepare will packet */
143: datlen = mqtt_msgPUBLISH(sess->sess_buf, sess->sess_will.topic, 0xDEAD, 0, 1, 0,
144: sess->sess_will.msg, sess->sess_will.msg ? strlen(sess->sess_will.msg) : 0);
145: if (datlen == -1)
146: return -1; /* error */
147:
148: return search4send(sess, sess->sess_will.topic, datlen, MQTT_QOS_ACK);
149: }
150:
151: static int
152: pubOnce(struct tagSession *sess, char * __restrict psTopic, int datlen)
153: {
154: return search4send(sess, psTopic, datlen, MQTT_QOS_ONCE);
155: }
156:
157: static int
158: pubAck(struct tagSession *sess, u_short mid, char * __restrict psTopic, int datlen)
159: {
160: struct mqtthdr *hdr = (struct mqtthdr*) sess->sess_buf->msg_base;
161:
162: /* write topic to database */
163: call.DeletePUB_topic(&cfg, pub, sess->sess_cid, mid, psTopic, sess->sess_user,
164: sess->sess_addr, hdr->mqtt_msg.retain);
165: call.WritePUB_topic(&cfg, pub, sess->sess_cid, mid, psTopic,
166: sess->sess_buf->msg_base, datlen, sess->sess_user, sess->sess_addr,
167: hdr->mqtt_msg.qos, hdr->mqtt_msg.retain);
168:
169: search4send(sess, psTopic, datlen, MQTT_QOS_ACK);
170:
171: /* delete not retain message */
172: call.DeletePUB_topic(&cfg, pub, sess->sess_cid, mid, psTopic, sess->sess_user,
173: sess->sess_addr, 0);
174: return 0;
175: }
176:
177: static int
178: pubExactly(struct tagSession *sess, u_short mid, char * __restrict psTopic, int datlen)
179: {
180: struct mqtthdr *hdr = (struct mqtthdr*) sess->sess_buf->msg_base;
181:
182: /* write topic to database */
183: call.DeletePUB_topic(&cfg, pub, sess->sess_cid, mid, psTopic, sess->sess_user,
184: sess->sess_addr, hdr->mqtt_msg.retain);
185: call.WritePUB_topic(&cfg, pub, sess->sess_cid, mid, psTopic,
186: sess->sess_buf->msg_base, datlen, sess->sess_user, sess->sess_addr,
187: hdr->mqtt_msg.qos, hdr->mqtt_msg.retain);
188:
189: return search4send(sess, psTopic, datlen, MQTT_QOS_EXACTLY);
190: }
191:
192:
193: int
194: cmdPUBLISH(void *srv, int len, void *arg)
195: {
196: struct mqtthdr *hdr;
197: struct tagSession *sess = (struct tagSession*) arg;
198: char szTopic[STRSIZ] = { 0 };
199: int siz = 0;
200: u_short mid = 0;
201: ait_val_t *p = NULL;
202:
203: ioTRACE(2);
204:
205: if (!sess)
206: return -1;
207:
208: ioDEBUG(5, "Exec PUBLISH session");
209: siz = mqtt_readPUBLISH(sess->sess_buf, szTopic, sizeof szTopic, &mid, NULL);
210: if (siz == -1) {
211: ioDEBUG(5, "Error:: in readPUBLISH #%d - %s", mqtt_GetErrno(), mqtt_GetError());
212: return 0;
213: }
214:
215: hdr = (struct mqtthdr*) sess->sess_buf->msg_base;
216: switch (hdr->mqtt_msg.qos) {
217: case MQTT_QOS_ACK:
218: if (pubAck(sess, mid, szTopic, mqtt_pktLen(hdr)))
219: return 0;
220: siz = mqtt_msgPUBACK(sess->sess_buf, mid);
221: if (siz == -1) {
222: ioDEBUG(5, "Error:: in msgPUBACK #%d - %s",
223: mqtt_GetErrno(), mqtt_GetError());
224: return 0;
225: }
226: break;
227: case MQTT_QOS_EXACTLY:
228: if (pubExactly(sess, mid, szTopic, mqtt_pktLen(hdr)))
229: return 0;
230: siz = mqtt_msgPUBREC(sess->sess_buf, mid);
231: if (siz == -1) {
232: ioDEBUG(5, "Error:: in msgPUBREC #%d - %s",
233: mqtt_GetErrno(), mqtt_GetError());
234: return 0;
235: }
236: break;
237: case MQTT_QOS_ONCE:
238: pubOnce(sess, szTopic, mqtt_pktLen(hdr));
239: default:
240: return 0;
241: }
242:
243: p = mkPkt(sess->sess_buf->msg_base, siz);
244: memset(sess->sess_buf->msg_base, 0, sess->sess_buf->msg_len);
245: schedWrite(root, sendPacket, p, sess->sess_sock, NULL, 0);
246: return 0;
247: }
248:
249: int
250: cmdPUBREL(void *srv, int len, void *arg)
251: {
252: struct tagSession *sess = (struct tagSession*) arg;
253: int siz = 0;
254: u_short mid = 0;
255: ait_val_t *p = NULL;
256:
257: ioTRACE(2);
258:
259: if (!sess)
260: return -1;
261:
262: ioDEBUG(5, "Exec PUBREL session");
263: mid = mqtt_readPUBREL(sess->sess_buf);
264: if (mid == (u_short) -1) {
265: ioDEBUG(5, "Error:: in readPUBREL #%d - %s", mqtt_GetErrno(), mqtt_GetError());
266: return 0;
267: }
268:
269: /* delete not retain message */
270: call.DeletePUB_topic(&cfg, pub, sess->sess_cid, mid, "%", sess->sess_user,
271: sess->sess_addr, 0);
272:
273: siz = mqtt_msgPUBCOMP(sess->sess_buf, mid);
274: if (siz == -1) {
275: ioDEBUG(5, "Error:: in msgPUBCOMP #%d - %s", mqtt_GetErrno(), mqtt_GetError());
276: return 0;
277: }
278:
279: p = mkPkt(sess->sess_buf->msg_base, siz);
280: memset(sess->sess_buf->msg_base, 0, sess->sess_buf->msg_len);
281: schedWrite(root, sendPacket, p, sess->sess_sock, NULL, 0);
282: return 0;
283: }
284:
285: int
286: cmdSUBSCRIBE(void *srv, int len, void *arg)
287: {
288: struct tagSession *sess = (struct tagSession*) arg;
289: mqtt_subscr_t *subs = NULL;
290: int siz = 0;
291: u_short mid = 0;
292: register int i;
293: struct tagStore *store;
294: char buf[BUFSIZ];
295: void *ptr;
296: ait_val_t *p = NULL;
297:
298: ioTRACE(2);
299:
300: if (!sess)
301: return -1;
302:
303: ioDEBUG(5, "Exec SUBSCRIBE session");
304: siz = mqtt_readSUBSCRIBE(sess->sess_buf, &mid, &subs);
305: if (siz == -1) {
306: ioDEBUG(5, "Error:: in readSUBSCRIBE #%d - %s", mqtt_GetErrno(), mqtt_GetError());
307: return 0;
308: }
309:
310: /* add to db */
311: for (i = 0; i < siz; i++) {
312: store = io_malloc(sizeof(struct tagStore));
313: if (!store) {
314: ioSYSERR(0);
315: continue;
316: } else {
317: store->st_msgid = mid;
318: mqtt_subCopy(&store->st_subscr, &subs[i]);
319: subs[i].sub_ret = MQTT_QOS_DENY;
320: }
321:
322: /* add to cache */
323: SLIST_INSERT_HEAD(&sess->sess_subscr, store, st_node);
324:
325: /* convert topic to regexp */
326: if (mqtt_expandTopic(subs[i].sub_topic.msg_base, buf, sizeof buf, 1, 1) == -1) {
327: ioDEBUG(5, "Error:: in regexp #%d - %s", mqtt_GetErrno(), mqtt_GetError());
328: } else {
329: ptr = realloc(store->st_subscr.sub_topic.msg_base, strlen(buf) + 1);
330: if (!ptr) {
331: ioSYSERR(0);
332: continue;
333: } else {
334: store->st_subscr.sub_topic.msg_base = ptr;
335: store->st_subscr.sub_topic.msg_len = strlen(buf) + 1;
336: memcpy(store->st_subscr.sub_topic.msg_base, buf,
337: store->st_subscr.sub_topic.msg_len);
338: }
339:
340: /* store to db */
341: call.WritePUB_subscribe(&cfg, pub, sess->sess_cid, mid, buf,
342: sess->sess_user, sess->sess_addr, store->st_subscr.sub_ret);
343: /* subscribe pass */
344: subs[i].sub_ret = MQTT_QOS_PASS;
345:
346: call.LOG(logg, "Added [%s] SUBSCRIBE '%s'(%d) QoS=%d from %s\n", sess->sess_cid,
347: store->st_subscr.sub_topic.msg_base,
348: store->st_subscr.sub_topic.msg_len,
349: store->st_subscr.sub_ret, sess->sess_addr);
350: }
351: }
352:
353: /* send acknowledge */
354: siz = mqtt_msgSUBACK(sess->sess_buf, subs, mid);
355: if (siz == -1) {
356: ioDEBUG(5, "Error:: in msgSUBACK #%d - %s", mqtt_GetErrno(), mqtt_GetError());
357: goto end;
358: } else {
359: p = mkPkt(sess->sess_buf->msg_base, siz);
360: memset(sess->sess_buf->msg_base, 0, sess->sess_buf->msg_len);
361: }
362:
363: schedWrite(root, sendPacket, p, sess->sess_sock, NULL, 0);
364: end:
365: mqtt_subFree(&subs);
366: return 0;
367: }
368:
369: int
370: cmdUNSUBSCRIBE(void *srv, int len, void *arg)
371: {
372: struct tagSession *sess = (struct tagSession*) arg;
373: mqtt_subscr_t *subs = NULL;
374: int siz = 0;
375: u_short mid = 0;
376: register int i;
377: struct tagStore *store, *tmp;
378: ait_val_t *p = NULL;
379:
380: ioTRACE(2);
381:
382: if (!sess)
383: return -1;
384:
385: ioDEBUG(5, "Exec UNSUBSCRIBE session");
386: siz = mqtt_readUNSUBSCRIBE(sess->sess_buf, &mid, &subs);
387: if (siz == -1) {
388: ioDEBUG(5, "Error:: in readUNSUBSCRIBE #%d - %s", mqtt_GetErrno(), mqtt_GetError());
389: return 0;
390: }
391:
392: /* del from db */
393: for (i = 0; i < siz; i++) {
394: SLIST_FOREACH_SAFE(store, &sess->sess_subscr, st_node, tmp) {
395: if (store->st_subscr.sub_ret == subs[i].sub_ret &&
396: store->st_subscr.sub_topic.msg_base &&
397: !strcmp(store->st_subscr.sub_topic.msg_base,
398: subs[i].sub_topic.msg_base)) {
399: SLIST_REMOVE(&sess->sess_subscr, store, tagStore, st_node);
400:
401: if (store->st_subscr.sub_topic.msg_base)
402: free(store->st_subscr.sub_topic.msg_base);
403: if (store->st_subscr.sub_value.msg_base)
404: free(store->st_subscr.sub_value.msg_base);
405: io_free(store);
406: }
407: }
408:
409: call.DeletePUB_subscribe(&cfg, pub, sess->sess_cid, subs[i].sub_topic.msg_base,
410: sess->sess_user, "%");
411: }
412:
413: /* send acknowledge */
414: siz = mqtt_msgUNSUBACK(sess->sess_buf, mid);
415: if (siz == -1) {
416: ioDEBUG(5, "Error:: in msgUNSUBACK #%d - %s", mqtt_GetErrno(), mqtt_GetError());
417: goto end;
418: } else {
419: p = mkPkt(sess->sess_buf->msg_base, siz);
420: memset(sess->sess_buf->msg_base, 0, sess->sess_buf->msg_len);
421: }
422:
423: schedWrite(root, sendPacket, p, sess->sess_sock, NULL, 0);
424: end:
425: mqtt_subFree(&subs);
426: return 0;
427: }
428:
429: int
430: cmdPINGREQ(void *srv, int len, void *arg)
431: {
432: struct tagSession *sess = (struct tagSession*) arg;
433: int siz = 0;
434: ait_val_t *p = NULL;
435:
436: ioTRACE(2);
437:
438: if (!sess)
439: return -1;
440:
441: ioDEBUG(5, "Exec PINGREQ session");
442: siz = mqtt_msgPINGRESP(sess->sess_buf);
443: if (siz == -1) {
444: ioDEBUG(5, "Error:: in msgPINGRESP #%d - %s", mqtt_GetErrno(), mqtt_GetError());
445: return 0;
446: } else {
447: p = mkPkt(sess->sess_buf->msg_base, siz);
448: memset(sess->sess_buf->msg_base, 0, sess->sess_buf->msg_len);
449: }
450:
451: schedWrite(root, sendPacket, p, sess->sess_sock, NULL, 0);
452: return 0;
453: }
454:
455: int
456: cmdCONNECT(void *srv, int len, void *arg)
457: {
458: struct tagStore *store;
459: struct tagSession *sess = (struct tagSession*) arg;
460:
461: ioTRACE(2);
462:
463: if (!sess)
464: return -1;
465:
466: ioDEBUG(5, "Exec CONNECT session");
467: TAILQ_REMOVE(&Sessions, sess, sess_node);
468:
469: schedCancelby(root, taskTIMER, CRITERIA_CALL, sendRetain, NULL);
470:
471: if (sess->sess_clean) {
472: if (call.FiniSessPUB)
473: call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%");
474: if (call.DeletePUB_subscribe)
475: call.DeletePUB_subscribe(&cfg, pub, sess->sess_cid, "%", sess->sess_user, "%");
476: if (call.WipePUB_topic)
477: call.WipePUB_topic(&cfg, pub, sess->sess_cid, sess->sess_user, -1);
478: }
479:
480: while ((store = SLIST_FIRST(&sess->sess_subscr))) {
481: SLIST_REMOVE_HEAD(&sess->sess_subscr, st_node);
482:
483: if (store->st_subscr.sub_topic.msg_base)
484: free(store->st_subscr.sub_topic.msg_base);
485: if (store->st_subscr.sub_value.msg_base)
486: free(store->st_subscr.sub_value.msg_base);
487:
488: io_free(store);
489: }
490:
491: if (sess->sess_will.flag)
492: pubWill(sess);
493:
494: if (sess->sess_will.msg)
495: free(sess->sess_will.msg);
496: if (sess->sess_will.topic)
497: free(sess->sess_will.topic);
498:
499: call.LOG(logg, "Session %s stopped from %s for user %s.\n", sess->sess_cid,
500: sess->sess_addr, sess->sess_user);
501:
502: return -3; /* reconnect client */
503: }
504:
505: int
506: cmdDISCONNECT(void *srv, int len, void *arg)
507: {
508: struct tagSession *sess = (struct tagSession*) arg;
509:
510: ioTRACE(2);
511:
512: if (!sess)
513: return -1;
514:
515: ioDEBUG(5, "Exec DISCONNECT session");
516:
517: call.LOG(logg, "Session %s stopped from %s for user %s.\n", sess->sess_cid,
518: sess->sess_addr, sess->sess_user);
519:
520: return -2; /* must terminate dispatcher */
521: }
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