Annotation of mqtt/src/daemon.c, revision 1.1.2.26
1.1.2.1 misho 1: #include "global.h"
1.1.2.16 misho 2: #include "rtlm.h"
1.1.2.24 misho 3: #include "utils.h"
1.1.2.11 misho 4: #include "mqttd.h"
1.1.2.1 misho 5:
6:
1.1.2.14 misho 7: static inline struct tagSession *
1.1.2.18 misho 8: initSession(int sock, ait_val_t * __restrict v)
1.1.2.14 misho 9: {
10: struct tagSession *sess = NULL;
11: const char *str;
12:
1.1.2.20 misho 13: ioTRACE(5);
1.1.2.15 misho 14:
1.1.2.18 misho 15: if (!v)
1.1.2.14 misho 16: return NULL;
17:
18: sess = malloc(sizeof(struct tagSession));
19: if (!sess) {
1.1.2.20 misho 20: ioDEBUG(3, "Error:: in malloc #%d - %s", errno, strerror(errno));
1.1.2.18 misho 21: io_freeVar(v);
1.1.2.14 misho 22: return NULL;
23: } else
24: memset(sess, 0, sizeof(struct tagSession));
25:
1.1.2.17 misho 26: str = (const char*) cfg_GetAttribute(&cfg, CFG("mqttd"), CFG("retry"));
1.1.2.14 misho 27: if (!str)
28: sess->sess_retry = DEFAULT_RETRY;
29: else
30: sess->sess_retry = strtol(str, NULL, 0);
31:
32: sess->sess_buf = mqtt_msgAlloc(0);
33: if (!sess->sess_buf) {
1.1.2.20 misho 34: ioDEBUG(3, "Error:: in msgAlloc #%d - %s", mqtt_GetErrno(), mqtt_GetError());
1.1.2.14 misho 35: free(sess);
1.1.2.18 misho 36: io_freeVar(v);
1.1.2.14 misho 37: return NULL;
38: }
39:
1.1.2.15 misho 40: sess->sess_sock = sock;
1.1.2.19 misho 41: strlcpy(sess->sess_addr, (char*) AIT_GET_STR(v), sizeof sess->sess_addr);
1.1.2.18 misho 42: io_freeVar(v);
1.1.2.14 misho 43: return sess;
44: }
45:
46: static void
47: finiSession(struct tagSession *sess)
48: {
49: register int i;
50: struct tagStore *store;
51:
1.1.2.20 misho 52: ioTRACE(5);
1.1.2.15 misho 53:
1.1.2.14 misho 54: if (!sess)
55: return;
56:
57: for (i = 0; i < MQTT_QOS_RESERVED; i++)
58: while ((store = SLIST_FIRST(&sess->sess_store[i]))) {
59: SLIST_REMOVE_HEAD(&sess->sess_store[i], st_node);
60: free(store);
61: }
62:
63: if (sess->sess_will.msg)
64: free(sess->sess_will.msg);
65: if (sess->sess_will.topic)
66: free(sess->sess_will.topic);
67:
1.1.2.24 misho 68: if (sess->sess_sock > STDERR_FILENO)
69: srv_Close(sess->sess_sock);
1.1.2.14 misho 70:
71: mqtt_msgFree(&sess->sess_buf, 42);
72:
73: free(sess);
74: }
75:
1.1.2.24 misho 76: static void
77: stopSession(struct tagSession *sess)
1.1.2.15 misho 78: {
1.1.2.24 misho 79: mqtt_msg_t msg = { NULL, 0 };
80: int ret;
81:
1.1.2.26! misho 82: ioTRACE(4);
! 83:
! 84: assert(sess);
! 85:
1.1.2.24 misho 86: pthread_mutex_lock(&mtx_sess);
87: TAILQ_REMOVE(&Sessions, sess, sess_node);
88: pthread_mutex_unlock(&mtx_sess);
89:
90: ret = mqtt_msgDISCONNECT(&msg);
91: if ((ret = send(sess->sess_sock, msg.msg_base, ret, 0)) == -1)
92: ioDEBUG(3, "Error:: send(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
93: else {
94: ioDEBUG(5, "Sended %d bytes for disconnect", ret);
95: free(msg.msg_base);
96: msg.msg_len = 0;
1.1.2.18 misho 97: }
98:
1.1.2.24 misho 99: ioDEBUG(1, "Close socket=%d", sess->sess_sock);
100: finiSession(sess);
101: }
102:
1.1.2.26! misho 103: static int
! 104: KASession(struct tagSession *sess)
! 105: {
! 106: u_char basebuf[USHRT_MAX];
! 107: mqtt_msg_t msg = { NULL, 0 }, buf = { basebuf, sizeof basebuf };
! 108: int ret;
! 109: struct pollfd pfd;
! 110:
! 111: ioTRACE(4);
! 112:
! 113: assert(sess);
! 114:
! 115: /* ping request */
! 116: ret = mqtt_msgPINGREQ(&msg);
! 117: if ((ret = send(sess->sess_sock, msg.msg_base, ret, 0)) == -1) {
! 118: ioDEBUG(3, "Error:: send(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
! 119: stopSession(sess);
! 120: return -1;
! 121: } else {
! 122: ioDEBUG(5, "Sended %d bytes for ping request", ret);
! 123: free(msg.msg_base);
! 124: memset(&msg, 0, sizeof msg);
! 125: }
! 126:
! 127: pfd.fd = sess->sess_sock;
! 128: pfd.events = POLLIN | POLLPRI;
! 129: if ((ret = poll(&pfd, 1, sess->sess_ka)) == -1) {
! 130: ioDEBUG(3, "Error:: poll(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
! 131: stopSession(sess);
! 132: return -1;
! 133: } else if (!ret) {
! 134: /* problem!!! session is abandoned ... must be disconnect! */
! 135: stopSession(sess);
! 136: return 1;
! 137: }
! 138: /* receive & decode packet */
! 139: if (recv(sess->sess_sock, buf.msg_base, buf.msg_len, 0) == -1) {
! 140: ioDEBUG(3, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
! 141: stopSession(sess);
! 142: return -1;
! 143: }
! 144: if (mqtt_readPINGRESP(&buf)) {
! 145: /* problem!!! session is broken, not hear ping response ... must be disconnect! */
! 146: stopSession(sess);
! 147: return 2;
! 148: }
! 149:
! 150: /* Keep Alive is OK! */
! 151: return 0;
! 152: }
! 153:
1.1.2.24 misho 154: static void *
155: thrSession(struct tagSession *sess)
156: {
157: pthread_cleanup_push((void(*)(void*)) stopSession, sess);
1.1.2.18 misho 158:
1.1.2.20 misho 159: ioTRACE(2);
1.1.2.15 misho 160:
1.1.2.18 misho 161: pthread_cleanup_pop(42);
1.1.2.15 misho 162: pthread_exit(NULL);
163: }
164:
165: static void *
1.1.2.5 misho 166: startSession(sched_task_t *task)
1.1.2.4 misho 167: {
1.1.2.11 misho 168: u_char basebuf[USHRT_MAX];
1.1.2.18 misho 169: mqtt_msg_t msg = { NULL, 0 }, buf = { basebuf, sizeof basebuf };
1.1.2.10 misho 170: mqtthdr_connflgs_t flg;
1.1.2.13 misho 171: mqtthdr_connack_t cack;
1.1.2.24 misho 172: struct tagSession *s, *sess = NULL;
1.1.2.18 misho 173: int ret;
174: pthread_attr_t attr;
1.1.2.6 misho 175:
1.1.2.20 misho 176: ioTRACE(4);
1.1.2.6 misho 177:
1.1.2.26! misho 178: assert(task);
! 179:
1.1.2.14 misho 180: sess = initSession(TASK_FD(task), TASK_ARG(task));
1.1.2.15 misho 181: if (!sess) {
1.1.2.18 misho 182: io_freeVar(TASK_ARG(task));
1.1.2.15 misho 183: close(TASK_FD(task));
1.1.2.14 misho 184: return NULL;
1.1.2.15 misho 185: }
1.1.2.6 misho 186:
1.1.2.18 misho 187: /* receive & decode packet */
1.1.2.14 misho 188: if (recv(sess->sess_sock, buf.msg_base, buf.msg_len, 0) == -1) {
1.1.2.20 misho 189: ioDEBUG(3, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
1.1.2.18 misho 190: finiSession(sess);
191: return NULL;
1.1.2.9 misho 192: }
1.1.2.14 misho 193: cack = mqtt_readCONNECT(&buf, &sess->sess_ka, sess->sess_cid, sizeof sess->sess_cid,
1.1.2.12 misho 194: sess->sess_user, sizeof sess->sess_user, sess->sess_pass, sizeof sess->sess_pass,
1.1.2.13 misho 195: &sess->sess_will.topic, &sess->sess_will.msg);
1.1.2.18 misho 196: ret = cack.retcode;
1.1.2.14 misho 197: flg.flags = cack.reserved;
198: if (flg.reserved) {
1.1.2.20 misho 199: ioDEBUG(3, "Error:: in MQTT protocol #%d - %s", mqtt_GetErrno(), mqtt_GetError());
1.1.2.10 misho 200: goto end;
1.1.2.14 misho 201: } else {
202: sess->sess_clean = flg.clean_sess;
203: sess->sess_will.qos = flg.will_qos;
204: sess->sess_will.retain = flg.will_retain;
205: sess->sess_will.flag = flg.will_flg;
1.1.2.12 misho 206: }
1.1.2.6 misho 207:
1.1.2.8 misho 208: /* check online table for user */
1.1.2.18 misho 209: if (call.LoginACC(&cfg, acc, sess->sess_user, sess->sess_pass) < 1) {
1.1.2.20 misho 210: ioDEBUG(0, "Login:: DENIED for username %s and password %s",
1.1.2.16 misho 211: sess->sess_user, sess->sess_pass);
1.1.2.21 misho 212: ret = MQTT_RETCODE_DENIED;
1.1.2.16 misho 213: goto end;
1.1.2.21 misho 214: } else {
1.1.2.24 misho 215: ioDEBUG(1, "Login:: ALLOWED for username %s ...", sess->sess_user);
1.1.2.21 misho 216: ret = MQTT_RETCODE_ACCEPTED;
217: }
1.1.2.23 misho 218: if (call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%") > 0) {
1.1.2.24 misho 219: ioDEBUG(2, "Old session %s should be disconnect!", sess->sess_cid);
220: TAILQ_FOREACH(s, &Sessions, sess_node)
221: if (!strcmp(s->sess_cid, sess->sess_cid)) {
1.1.2.25 misho 222: /* found stale session & disconnect it! */
1.1.2.24 misho 223: stopSession(s);
224: break;
225: }
1.1.2.23 misho 226: }
227: if (call.InitSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, sess->sess_addr,
228: sess->sess_will.flag, sess->sess_will.topic, sess->sess_will.msg,
229: sess->sess_will.qos, sess->sess_will.retain) == -1) {
230: ioDEBUG(0, "Session %s DENIED for username %s", sess->sess_cid, sess->sess_user);
231: ret = MQTT_RETCODE_DENIED;
232: goto end;
233: } else {
234: ioDEBUG(0, "Session %s from %s and username %s is started",
235: sess->sess_cid, sess->sess_addr, sess->sess_user);
236: ret = MQTT_RETCODE_ACCEPTED;
237: }
1.1.2.6 misho 238:
1.1.2.18 misho 239: ret = mqtt_msgCONNACK(&msg, ret);
240: if ((ret = send(sess->sess_sock, msg.msg_base, ret, 0)) == -1) {
1.1.2.20 misho 241: ioDEBUG(3, "Error:: send(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
1.1.2.18 misho 242: finiSession(sess);
243: return NULL;
244: } else {
1.1.2.20 misho 245: ioDEBUG(5, "Sended %d bytes", ret);
1.1.2.19 misho 246: free(msg.msg_base);
247: msg.msg_len = 0;
1.1.2.18 misho 248: }
249:
1.1.2.15 misho 250: /* Start session thread OK ... */
1.1.2.18 misho 251: pthread_attr_init(&attr);
252: pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
253:
254: pthread_mutex_lock(&mtx_sess);
1.1.2.15 misho 255: TAILQ_INSERT_TAIL(&Sessions, sess, sess_node);
1.1.2.18 misho 256: pthread_create(&sess->sess_tid, &attr, (void*(*)(void*)) thrSession, sess);
257: pthread_mutex_unlock(&mtx_sess);
258:
1.1.2.23 misho 259: call.LOG(logg, "Session %s started from %s for user %s OK!\n", sess->sess_cid,
260: sess->sess_addr, sess->sess_user);
1.1.2.18 misho 261:
262: pthread_attr_destroy(&attr);
1.1.2.15 misho 263: return NULL;
1.1.2.6 misho 264: end: /* close client connection */
1.1.2.18 misho 265: ret = mqtt_msgCONNACK(&msg, ret);
266: if ((ret = send(sess->sess_sock, msg.msg_base, ret, 0)) == -1) {
1.1.2.20 misho 267: ioDEBUG(3, "Error:: send(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
1.1.2.18 misho 268: } else {
1.1.2.20 misho 269: ioDEBUG(5, "Sended %d bytes", ret);
1.1.2.19 misho 270: free(msg.msg_base);
271: msg.msg_len = 0;
1.1.2.18 misho 272: }
273:
1.1.2.20 misho 274: ioDEBUG(1, "Close client %s with socket=%d", sess->sess_addr, sess->sess_sock);
1.1.2.15 misho 275: finiSession(sess);
1.1.2.6 misho 276: return NULL;
1.1.2.4 misho 277: }
278:
279: /* ----------------------------------------------------------------------- */
280:
1.1.2.5 misho 281: static void *
282: thrSched(void *arg __unused)
283: {
1.1.2.18 misho 284: struct tagSession *sess;
1.1.2.5 misho 285:
1.1.2.20 misho 286: ioTRACE(1);
287:
288: schedRun(root, &Kill);
1.1.2.18 misho 289:
290: TAILQ_FOREACH(sess, &Sessions, sess_node)
291: if (sess->sess_tid)
292: pthread_cancel(sess->sess_tid);
1.1.2.5 misho 293: pthread_exit(NULL);
294: }
295:
1.1.2.2 misho 296: int
1.1.2.3 misho 297: Run(int sock)
1.1.2.2 misho 298: {
1.1.2.4 misho 299: io_sockaddr_t sa;
300: socklen_t sslen = sizeof sa.ss;
301: int cli;
1.1.2.5 misho 302: pthread_t tid;
1.1.2.18 misho 303: ait_val_t *v;
1.1.2.23 misho 304: char str[STRSIZ];
1.1.2.4 misho 305:
1.1.2.20 misho 306: ioTRACE(1);
1.1.2.2 misho 307:
1.1.2.5 misho 308: if (pthread_create(&tid, NULL, thrSched, NULL)) {
1.1.2.20 misho 309: ioLOGERR(0);
1.1.2.5 misho 310: return -1;
311: } else
312: pthread_detach(tid);
1.1.2.20 misho 313: ioDEBUG(2, "Run scheduler management thread");
1.1.2.5 misho 314:
1.1.2.24 misho 315: if (listen(sock, SOMAXCONN) == -1) {
1.1.2.20 misho 316: ioLOGERR(0);
1.1.2.3 misho 317: return -1;
318: }
319:
1.1.2.4 misho 320: while (!Kill) {
321: if ((cli = accept(sock, &sa.sa, &sslen)) == -1) {
1.1.2.20 misho 322: if (!Kill)
323: continue;
324: ioLOGERR(0);
325: break;
1.1.2.18 misho 326: }
327: v = io_allocVar();
328: if (!v) {
329: ioLIBERR(mqtt);
330: break;
1.1.2.23 misho 331: } else {
332: memset(str, 0, sizeof str);
333: snprintf(str, sizeof str, "%s:%hu", io_n2addr(&sa, v), io_n2port(&sa));
334: AIT_SET_STR(v, str);
335: }
336: ioDEBUG(1, "Connected client with socket=%d from %s", cli, AIT_GET_STR(v));
1.1.2.4 misho 337:
1.1.2.18 misho 338: if (!schedRead(root, startSession, v, cli)) {
339: io_freeVar(v);
1.1.2.4 misho 340: close(cli);
1.1.2.20 misho 341: ioDEBUG(1, "Terminated client with socket=%d", cli);
1.1.2.4 misho 342: }
343: }
344:
1.1.2.2 misho 345: return 0;
346: }
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