--- mqtt/src/daemon.c	2011/12/05 08:15:50	1.1.2.7
+++ mqtt/src/daemon.c	2012/05/14 13:04:14	1.2.2.31
@@ -1,135 +1,385 @@
 #include "global.h"
+#include "rtlm.h"
+#include "utils.h"
+#include "mqttd.h"
+#include "mqttd_calls.h"
 
 
-extern char cliCmd[], *cliStr[];
+static inline struct tagSession *
+initSession(int sock, ait_val_t * __restrict v)
+{
+	struct tagSession *sess = NULL;
+	const char *str;
 
+	ioTRACE(5);
 
+	if (!v)
+		return NULL;
+
+	sess = malloc(sizeof(struct tagSession));
+	if (!sess) {
+		ioSYSERR(0);
+		return NULL;
+	} else
+		memset(sess, 0, sizeof(struct tagSession));
+
+	SLIST_INIT(&sess->sess_subscr);
+
+	str = cfg_getAttribute(&cfg, "mqttd", "retry");
+	if (!str)
+		sess->sess_retry = DEFAULT_RETRY;
+	else
+		sess->sess_retry = strtol(str, NULL, 0);
+
+	sess->sess_buf = mqtt_msgAlloc(USHRT_MAX);
+	if (!sess->sess_buf) {
+		ioLIBERR(mqtt);
+		free(sess);
+		return NULL;
+	}
+
+	/* init server actor */
+	sess->sess_srv = mqtt_srv_Init(sock, sess->sess_buf, sess->sess_ka);
+	if (!sess->sess_srv) {
+		ioDEBUG(3, "Error:: in srv_Init #%d - %s", mqtt_GetErrno(), mqtt_GetError());
+		mqtt_msgFree(&sess->sess_buf, 42);
+		free(sess);
+		return NULL;
+	} else {
+		mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_CONNECT, cmdCONNECT);
+		mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_PUBLISH, cmdPUBLISH);
+		mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_PUBREL, cmdPUBREL);
+		mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_SUBSCRIBE, cmdSUBSCRIBE);
+		mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_UNSUBSCRIBE, cmdUNSUBSCRIBE);
+		mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_PINGREQ, cmdPINGREQ);
+		mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_DISCONNECT, cmdDISCONNECT);
+	}
+
+	sess->sess_sock = sock;
+	strlcpy(sess->sess_addr, (char*) AIT_GET_STR(v), sizeof sess->sess_addr);
+	return sess;
+}
+
+static void
+finiSession(struct tagSession *sess)
+{
+	struct tagStore *store;
+
+	ioTRACE(5);
+
+	if (!sess)
+		return;
+
+	if (sess->sess_clean) {
+		if (call.FiniSessPUB)
+			call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%");
+		if (call.DeletePUB_subscribe)
+			call.DeletePUB_subscribe(&cfg, pub, sess->sess_cid, "%", sess->sess_user, "%");
+		if (call.WipePUB_topic)
+			call.WipePUB_topic(&cfg, pub, sess->sess_cid, sess->sess_user, -1);
+	}
+
+	while ((store = SLIST_FIRST(&sess->sess_subscr))) {
+		SLIST_REMOVE_HEAD(&sess->sess_subscr, st_node);
+
+		if (store->st_subscr.sub_topic.msg_base)
+			free(store->st_subscr.sub_topic.msg_base);
+		if (store->st_subscr.sub_value.msg_base)
+			free(store->st_subscr.sub_value.msg_base);
+
+		free(store);
+	}
+
+	if (sess->sess_will.msg)
+		free(sess->sess_will.msg);
+	if (sess->sess_will.topic)
+		free(sess->sess_will.topic);
+
+	if (sess->sess_sock > STDERR_FILENO)
+		srv_Close(sess->sess_sock);
+
+	mqtt_srv_Fini(&sess->sess_srv);
+	mqtt_msgFree(&sess->sess_buf, 42);
+
+	free(sess);
+}
+
 static void *
+leaveClient(sched_task_t *task)
+{
+	struct tagSession *sess;
+	int ret;
+
+	ioTRACE(4);
+
+	assert(task);
+
+	sess = TASK_ARG(task);
+	assert(sess);
+
+	TAILQ_REMOVE(&Sessions, sess, sess_node);
+
+	ret = mqtt_msgDISCONNECT(sess->sess_buf);
+	send(TASK_FD(task), sess->sess_buf->msg_base, ret, MSG_NOSIGNAL);
+
+	ioDEBUG(1, "Close socket=%d", TASK_FD(task));
+	call.LOG(logg, "Session %s stopped from %s for user %s.\n", sess->sess_cid, 
+			sess->sess_addr, sess->sess_user);
+
+	finiSession(sess);
+	return NULL;
+}
+
+static void *
+dispatchSession(sched_task_t *task)
+{
+	int ret, len = 0;
+	struct tagSession *sess;
+
+	ioTRACE(2);
+
+	assert(task);
+
+	sess = TASK_ARG(task);
+	assert(sess);
+
+	/* receive & decode packet */
+	if ((ret = recv(TASK_FD(task), sess->sess_buf->msg_base, sess->sess_buf->msg_len, 0)) == -1) {
+		ioDEBUG(3, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
+		TAILQ_REMOVE(&Sessions, sess, sess_node);
+		finiSession(sess);
+		return NULL;
+	} else if (!ret) {
+		ioDEBUG(4, "Session %s EOF received.", sess->sess_cid);
+		TAILQ_REMOVE(&Sessions, sess, sess_node);
+		finiSession(sess);
+		return NULL;
+	}
+
+	do {
+		/* dispatch message type */
+		if ((len = mqtt_srv_Dispatch(sess->sess_srv, ret, sess)) < 0) {
+			if (len == -1) {
+				ioLIBERR(mqtt);
+				finiSession(sess);
+			} else if (len == -2) {
+				TAILQ_REMOVE(&Sessions, sess, sess_node);
+				finiSession(sess);
+			} else if (len == -3)
+				schedEvent(root, startSession, NULL, (u_long) TASK_FD(task), sess, ret);
+		} else
+			ret -= len;
+	} while (len > 0 && ret > 0);
+
+	if (len >= 0 && !schedRead(root, dispatchSession, TASK_ARG(task), TASK_FD(task), NULL, 0)) {
+		ioLIBERR(sched);
+		TAILQ_REMOVE(&Sessions, sess, sess_node);
+		finiSession(sess);
+	}
+	return NULL;
+}
+
+void *
 startSession(sched_task_t *task)
 {
-	mqtt_msg_t *buf;
-	mqtt_cb_t cbs[MQTT_TYPE_MAX + 1] = { 0 };
-	struct mqtthdr *hdr;
-	int ret = 0;
-	register int i;
+	u_char basebuf[USHRT_MAX];
+	mqtt_msg_t buf = { basebuf, sizeof basebuf };
+	mqtthdr_connflgs_t flg;
+	mqtthdr_connack_t cack;
+	ait_val_t *v;
+	struct tagSession *s, *sess = NULL;
+	int ret, wlen;
 
-	FTRACE(4);
+	ioTRACE(4);
 
-	buf = mqtt_msgAlloc(USHRT_MAX);
-	if (!buf) {
-		syslog(LOG_ERR, "Error:: allocate message buf (%d) #%d - %s", (int) TASK_FD(task), 
-				mqtt_GetErrno(), mqtt_GetError());
+	assert(task);
+
+	if (!TASK_DATA(task)) {
+		v = TASK_ARG(task);
+		/* flow from accept new clients */
+		sess = initSession(TASK_FD(task), v);
+		io_freeVar(&v);
+		if (!sess) {
+			close(TASK_FD(task));
+			return NULL;
+		}
+
+		/* receive & decode packet */
+		if (recv(sess->sess_sock, buf.msg_base, buf.msg_len, 0) == -1) {
+			ioDEBUG(3, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno));
+			finiSession(sess);
+			return NULL;
+		}
+	} else {
+		sess = TASK_DATA(task);
+		assert(sess);
+
+		buf.msg_len = TASK_DATLEN(task) > sizeof basebuf ? sizeof basebuf : TASK_DATLEN(task);
+		memcpy(buf.msg_base, sess->sess_buf->msg_base, buf.msg_len);
+	}
+
+	cack = mqtt_readCONNECT(&buf, &sess->sess_ka, sess->sess_cid, sizeof sess->sess_cid, 
+			sess->sess_user, sizeof sess->sess_user, sess->sess_pass, sizeof sess->sess_pass, 
+			&sess->sess_will.topic, &sess->sess_will.msg);
+	ret = cack.retcode;
+	flg.flags = cack.reserved;
+	if (flg.reserved) {
+		ioDEBUG(3, "Error:: in MQTT protocol #%d - %s", mqtt_GetErrno(), mqtt_GetError());
 		goto end;
+	} else {
+		sess->sess_clean = flg.clean_sess;
+		sess->sess_will.qos = flg.will_qos;
+		sess->sess_will.retain = flg.will_retain;
+		sess->sess_will.flag = flg.will_flg;
+
+		sess->sess_srv->timeout = sess->sess_ka;
 	}
 
-	if (recv(TASK_FD(task), buf->msg_base, buf->msg_len, 0) == -1) {
-		syslog(LOG_ERR, "Error:: recv(%d) #%d - %s", (int) TASK_FD(task), 
-				errno, strerror(errno));
-		mqtt_msgFree(&buf, 42);
+	/* check online table for user */
+	if (call.LoginACC(&cfg, acc, sess->sess_user, sess->sess_pass) < 1) {
+		ioDEBUG(0, "Login:: DENIED for username %s and password %s", 
+				sess->sess_user, sess->sess_pass);
+		ret = MQTT_RETCODE_DENIED;
 		goto end;
 	} else {
-		hdr = (struct mqtthdr*) buf->msg_base;
-		for (ret = i = 0; cliCmd[i] && !(ret = (hdr->mqtt_msg.type == cliCmd[i])); i++);
-		if (!ret) {
-			syslog(LOG_ERR, "Error:: wrong command type #%d %s", 
-					hdr->mqtt_msg.type, cliStr[i]);
-			mqtt_msgFree(&buf, 42);
-			goto end;
-		}
+		ioDEBUG(1, "Login:: ALLOWED for username %s ...", sess->sess_user);
+		ret = MQTT_RETCODE_ACCEPTED;
 	}
 
-	ret = mqttDispatcher(cbs, buf);
+	/* db management */
+	if (call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%") > 0) {
+		ioDEBUG(2, "Old session %s should be disconnect!", sess->sess_cid);
+		TAILQ_FOREACH(s, &Sessions, sess_node)
+			if (!strcmp(s->sess_cid, sess->sess_cid)) {
+				/* found stale session & disconnect it! */
+				schedWrite(root, leaveClient, sess, TASK_FD(task), NULL, 0);
+				break;
+			}
+	}
+	if (call.InitSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, sess->sess_addr, 
+				sess->sess_will.flag, sess->sess_will.topic, sess->sess_will.msg, 
+				sess->sess_will.qos, sess->sess_will.retain) == -1) {
+		ioDEBUG(0, "Session %s DENIED for username %s", sess->sess_cid, sess->sess_user);
+		ret = MQTT_RETCODE_DENIED;
+		goto end;
+	} else {
+		ioDEBUG(0, "Session %s from %s and username %s is started", 
+				sess->sess_cid, sess->sess_addr, sess->sess_user);
+		ret = MQTT_RETCODE_ACCEPTED;
+	}
+	/* clean/load session if requested */
+	if (sess->sess_clean) {
+		if (call.DeletePUB_subscribe)
+			call.DeletePUB_subscribe(&cfg, pub, sess->sess_cid, "%", sess->sess_user, "%");
+		if (call.WipePUB_topic)
+			call.WipePUB_topic(&cfg, pub, sess->sess_cid, sess->sess_user, -1);
+	} else {
+		// todo: read_sql subs and prepare publish
+	}
 
-	mqtt_msgFree(&buf, 42);
+	/* Start session task OK ... */
+	if (!schedRead(root, dispatchSession, sess, TASK_FD(task), NULL, 0)) {
+		ioLIBERR(sched);
+		ret = MQTT_RETCODE_DENIED;
+	} else
+		TAILQ_INSERT_TAIL(&Sessions, sess, sess_node);
 
-	switch (ret) {
-		case -1:
-			syslog(LOG_ERR, "Error:: in MQTT protocol #%d - %s", mqtt_GetErrno(), mqtt_GetError());
-			break;
-		default:
-			return NULL;
-	}
+	call.LOG(logg, "Session %s started from %s for user %s (timeout=%d) OK!\n", sess->sess_cid, 
+			sess->sess_addr, sess->sess_user, sess->sess_ka);
 end:	/* close client connection */
-	close(TASK_FD(task));
-	VERB(1) syslog(LOG_DEBUG, "Close client %s with socket=%d", 
-			(char*) TASK_ARG(task), (int) TASK_FD(task));
-	if (TASK_ARG(task))
-		free(TASK_ARG(task));
+	wlen = mqtt_msgCONNACK(sess->sess_buf, ret);
+	if ((wlen = send(TASK_FD(task), sess->sess_buf->msg_base, wlen, 0)) == -1) {
+		ioDEBUG(3, "Error:: send(%d) #%d - %s", TASK_FD(task), errno, strerror(errno));
+	} else
+		ioDEBUG(5, "Sended %d bytes", wlen);
+
+	if (ret != MQTT_RETCODE_ACCEPTED) {
+		ioDEBUG(1, "Close client %s with socket=%d", sess->sess_addr, TASK_FD(task));
+		finiSession(sess);
+	}
 	return NULL;
 }
 
-/* ----------------------------------------------------------------------- */
-
 static void *
-thrSched(void *arg __unused)
+acceptClient(sched_task_t *task)
 {
-	FTRACE(1);
+	int cli;
+	io_sockaddr_t sa;
+	socklen_t sslen = sizeof sa.ss;
+	ait_val_t *v;
+	char str[STRSIZ];
 
-	schedRun(root, (intptr_t*) &Kill);
-	pthread_exit(NULL);
+	ioTRACE(4);
+
+	assert(task);
+
+	if ((cli = accept(TASK_FD(task), &sa.sa, &sslen)) == -1)
+		goto end;
+	else
+		fcntl(cli, F_SETFL, fcntl(cli, F_GETFL, 0) | O_NONBLOCK);
+
+	v = io_allocVar();
+	if (!v) {
+		ioLIBERR(io);
+		close(cli);
+		goto end;
+	} else {
+		memset(str, 0, sizeof str);
+		snprintf(str, sizeof str, "%s:%hu", io_n2addr(&sa, v), io_n2port(&sa));
+		AIT_FREE_VAL(v);
+		AIT_SET_STR(v, str);
+	}
+	ioDEBUG(1, "Connected client with socket=%d from %s", cli, AIT_GET_STR(v));
+
+	if (!schedRead(root, startSession, v, cli, NULL, 0)) {
+		io_freeVar(&v);
+		close(cli);
+		ioDEBUG(1, "Terminated client with socket=%d", cli);
+	}
+end:
+	if (!schedRead(root, acceptClient, NULL, TASK_FD(task), NULL, 0))
+		ioLIBERR(sched);
+	return NULL;
 }
 
+/* ----------------------------------------------------------------------- */
+
 int
 Run(int sock)
 {
-	io_sockaddr_t sa;
-	socklen_t sslen = sizeof sa.ss;
-	int cli;
-	char *str = NULL, szAddr[STRSIZ] = { 0 };
-	pthread_t tid;
+	struct tagPub *pub;
+	struct tagSession *sess;
+	struct timespec pl = { 0, 100000000 };
 
-	FTRACE(1);
+	ioTRACE(1);
 
-	if (pthread_create(&tid, NULL, thrSched, NULL)) {
-		syslog(LOG_ERR, "Error:: thread scheduler #%d - %s", errno, strerror(errno));
+	if (listen(sock, SOMAXCONN) == -1) {
+		ioSYSERR(0);
 		return -1;
 	} else
-		pthread_detach(tid);
-	VERB(2) syslog(LOG_DEBUG, "Run scheduler management thread");
+		fcntl(sock, F_SETFL, fcntl(sock, F_GETFL, 0) | O_NONBLOCK);
 
-	if (listen(sock, SOMAXCONN) == -1) {
-		syslog(LOG_ERR, "Error:: listen(%d) #%d - %s\n", sock, errno, strerror(errno));
-		pthread_cancel(tid);
+	/* state machine - accept new connections */
+	if (!schedRead(root, acceptClient, NULL, sock, NULL, 0)) {
+		ioLIBERR(sched);
 		return -1;
 	}
 
-	while (!Kill) {
-		if ((cli = accept(sock, &sa.sa, &sslen)) == -1) {
-			syslog(LOG_ERR, "Error:: accept() #%d - %s", errno, strerror(errno));
-			continue;
-		} else
-			VERB(1) {
-				switch (sa.sa.sa_family) {
-					case AF_INET:
-						inet_ntop(AF_INET, &sa.sin.sin_addr, szAddr, sslen);
-						snprintf(szAddr, sizeof szAddr, "%s:%d", 
-								szAddr, ntohs(sa.sin.sin_port));
-						break;
-					case AF_INET6:
-						inet_ntop(AF_INET6, &sa.sin6.sin6_addr, szAddr, sslen);
-						snprintf(szAddr, sizeof szAddr, "%s:%d", 
-								szAddr, ntohs(sa.sin6.sin6_port));
-						break;
-					case AF_LOCAL:
-						strlcpy(szAddr, sa.sun.sun_path, sizeof szAddr);
-						break;
-					default:
-						close(cli);
-						syslog(LOG_ERR, "Error:: unsupported address type %d", 
-								sa.sa.sa_family);
-						continue;
-				}
-				str = strdup(szAddr);
-				syslog(LOG_DEBUG, "Connected client with socket=%d from %s", cli, str);
-			}
+	schedPolling(root, &pl, NULL);
+	schedRun(root, &Kill);
 
-		if (!schedRead(root, startSession, str, cli)) {
-			close(cli);
-			VERB(1) syslog(LOG_DEBUG, "Terminated client with socket=%d", cli);
-			if (str)
-				free(str);
-		}
+	/* free all undeleted elements into lists */
+	TAILQ_FOREACH(pub, &Pubs, pub_node) {
+		TAILQ_REMOVE(&Pubs, pub, pub_node);
+
+		AIT_FREE_VAL(&pub->pub_name);
+		if (pub->pub_packet.msg_base)
+			free(pub->pub_packet.msg_base);
 	}
+	TAILQ_FOREACH(sess, &Sessions, sess_node) {
+		TAILQ_REMOVE(&Sessions, sess, sess_node);
 
+		finiSession(sess);
+	}
 	return 0;
 }