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