version 1.1.2.2, 2011/11/30 01:06:30
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version 1.6, 2017/10/08 22:49:24
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/************************************************************************* |
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* (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com> |
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* by Michael Pounov <misho@openbsd-bg.org> |
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* |
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* $Author$ |
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* $Id$ |
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* |
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************************************************************************** |
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The ELWIX and AITNET software is distributed under the following |
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terms: |
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All of the documentation and software included in the ELWIX and AITNET |
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Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org> |
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Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 |
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by Michael Pounov <misho@elwix.org>. All rights reserved. |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions |
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are met: |
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1. Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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2. Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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3. All advertising materials mentioning features or use of this software |
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must display the following acknowledgement: |
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This product includes software developed by Michael Pounov <misho@elwix.org> |
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ELWIX - Embedded LightWeight unIX and its contributors. |
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4. Neither the name of AITNET nor the names of its contributors |
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may be used to endorse or promote products derived from this software |
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without specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND |
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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SUCH DAMAGE. |
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*/ |
#include "global.h" |
#include "global.h" |
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#include "rtlm.h" |
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#include "mqttd.h" |
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#include "mqttd_calls.h" |
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#include "utils.h" |
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static inline struct tagSession * |
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initSession(int sock, ait_val_t * __restrict v) |
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{ |
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struct tagSession *sess = NULL; |
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const char *str; |
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ETRACE(); |
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if (!v) |
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return NULL; |
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sess = e_malloc(sizeof(struct tagSession)); |
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if (!sess) { |
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ELIBERR(elwix); |
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return NULL; |
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} else |
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memset(sess, 0, sizeof(struct tagSession)); |
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SLIST_INIT(&sess->sess_subscr); |
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str = cfg_getAttribute(&cfg, "mqttd", "retry"); |
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if (!str) |
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sess->sess_retry = DEFAULT_RETRY; |
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else |
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sess->sess_retry = strtol(str, NULL, 0); |
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sess->sess_buf = mqtt_msgAlloc(USHRT_MAX); |
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if (!sess->sess_buf) { |
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ELIBERR(mqtt); |
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e_free(sess); |
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return NULL; |
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} |
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/* init server actor */ |
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sess->sess_srv = mqtt_srv_cliInit(sock, sess->sess_buf, sess->sess_ka, 1); |
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if (!sess->sess_srv) { |
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EVERBOSE(3, "Error:: in srv_Init #%d - %s", mqtt_GetErrno(), mqtt_GetError()); |
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mqtt_msgFree(&sess->sess_buf, 42); |
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e_free(sess); |
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return NULL; |
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} else { |
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mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_CONNECT, cmdCONNECT); |
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mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_PUBLISH, cmdPUBLISH); |
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mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_PUBREL, cmdPUBREL); |
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mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_SUBSCRIBE, cmdSUBSCRIBE); |
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mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_UNSUBSCRIBE, cmdUNSUBSCRIBE); |
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mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_PINGREQ, cmdPINGREQ); |
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mqtt_srv_setCmd(sess->sess_srv, MQTT_TYPE_DISCONNECT, cmdDISCONNECT); |
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} |
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sess->sess_sock = sock; |
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strlcpy(sess->sess_addr, (char*) AIT_GET_STR(v), sizeof sess->sess_addr); |
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return sess; |
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} |
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static void |
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finiSession(struct tagSession *sess) |
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{ |
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struct tagStore *store; |
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ETRACE(); |
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if (!sess) |
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return; |
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schedCancelby(root, taskTIMER, CRITERIA_CALL, sendRetain, NULL); |
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if (sess->sess_clean) { |
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if (call.FiniSessPUB) |
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call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%"); |
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if (call.DeletePUB_subscribe) |
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call.DeletePUB_subscribe(&cfg, pub, sess->sess_cid, "%", sess->sess_user, "%"); |
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if (call.WipePUB_topic) /* only dynamic messages */ |
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call.WipePUB_topic(&cfg, pub, sess->sess_cid, sess->sess_user, 0); |
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} |
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while ((store = SLIST_FIRST(&sess->sess_subscr))) { |
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SLIST_REMOVE_HEAD(&sess->sess_subscr, st_node); |
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if (store->st_subscr.sub_topic.msg_base) |
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free(store->st_subscr.sub_topic.msg_base); |
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if (store->st_subscr.sub_value.msg_base) |
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free(store->st_subscr.sub_value.msg_base); |
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e_free(store); |
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} |
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if (sess->sess_will.flag) |
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pubWill(sess); |
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if (sess->sess_will.topic) |
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free(sess->sess_will.topic); |
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if (sess->sess_will.msg) |
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free(sess->sess_will.msg); |
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if (sess->sess_sock > STDERR_FILENO) |
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srv_Close(sess->sess_sock); |
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mqtt_srv_cliFini(&sess->sess_srv); |
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mqtt_msgFree(&sess->sess_buf, 42); |
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e_free(sess); |
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} |
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static void * |
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leaveClient(sched_task_t *task) |
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{ |
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struct tagSession *sess; |
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int ret; |
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ETRACE(); |
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assert(task); |
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sess = TASK_ARG(task); |
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assert(sess); |
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TAILQ_REMOVE(&Sessions, sess, sess_node); |
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ret = mqtt_msgDISCONNECT(sess->sess_buf); |
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send(TASK_FD(task), sess->sess_buf->msg_base, ret, MSG_NOSIGNAL); |
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EVERBOSE(1, "Close socket=%ld", (long) TASK_FD(task)); |
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call.LOG(logg, "Session %s stopped from %s for user %s.\n", sess->sess_cid, |
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sess->sess_addr, sess->sess_user); |
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finiSession(sess); |
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return NULL; |
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} |
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static void * |
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dispatchSession(sched_task_t *task) |
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{ |
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int ret, len = 0; |
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struct tagSession *sess; |
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ETRACE(); |
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assert(task); |
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sess = TASK_ARG(task); |
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assert(sess); |
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/* receive & decode packet */ |
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if ((ret = recv(TASK_FD(task), sess->sess_buf->msg_base, sess->sess_buf->msg_len, 0)) == -1) { |
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EVERBOSE(3, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno)); |
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TAILQ_REMOVE(&Sessions, sess, sess_node); |
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finiSession(sess); |
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return NULL; |
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} else if (!ret) { |
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EVERBOSE(4, "Session %s EOF received.", sess->sess_cid); |
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TAILQ_REMOVE(&Sessions, sess, sess_node); |
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finiSession(sess); |
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return NULL; |
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} |
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do { |
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/* dispatch message type */ |
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if ((len = mqtt_srv_cliDispatch(sess->sess_srv, ret, sess)) < 0) { |
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if (len == -1) { |
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ELIBERR(mqtt); |
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finiSession(sess); |
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} else if (len == -2) { |
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TAILQ_REMOVE(&Sessions, sess, sess_node); |
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finiSession(sess); |
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} else if (len == -3) |
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schedEvent(root, startSession, NULL, (u_long) TASK_FD(task), sess, ret); |
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} else |
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ret -= len; |
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} while (len > 0 && ret > 0); |
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if (len >= 0 && !schedRead(root, dispatchSession, TASK_ARG(task), TASK_FD(task), NULL, 0)) { |
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ELIBERR(sched); |
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TAILQ_REMOVE(&Sessions, sess, sess_node); |
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finiSession(sess); |
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} |
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return NULL; |
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} |
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static int |
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loadSubscribes(struct tagSession * __restrict sess, mqtt_subscr_t * __restrict subs) |
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{ |
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register int i; |
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struct tagStore *store; |
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if (!subs) |
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return -1; |
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for (i = 0; subs[i].sub_topic.msg_base; i++) { |
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store = e_malloc(sizeof(struct tagStore)); |
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if (!store) { |
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ELIBERR(elwix); |
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continue; |
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} else { |
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store->st_msgid = 0; |
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mqtt_subCopy(&store->st_subscr, &subs[i]); |
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} |
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/* add to cache */ |
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SLIST_INSERT_HEAD(&sess->sess_subscr, store, st_node); |
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} |
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return 0; |
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} |
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void * |
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startSession(sched_task_t *task) |
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{ |
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u_char basebuf[USHRT_MAX]; |
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mqtt_msg_t buf = { basebuf, sizeof basebuf }; |
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mqtthdr_connflgs_t flg; |
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mqtthdr_connack_t cack; |
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ait_val_t *v; |
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struct tagSession *s, *sess = NULL; |
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int ret, wlen; |
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mqtt_subscr_t *subs; |
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struct timespec ts = { RETAIN_TIMEOUT, 0 }; |
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intptr_t sock; |
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ETRACE(); |
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assert(task); |
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if (!TASK_DATA(task)) { |
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v = TASK_ARG(task); |
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/* flow from accept new clients */ |
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sess = initSession(TASK_FD(task), v); |
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ait_freeVar(&v); |
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if (!sess) { |
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close(TASK_FD(task)); |
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return NULL; |
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} |
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/* receive & decode packet */ |
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if (recv(sess->sess_sock, buf.msg_base, buf.msg_len, 0) == -1) { |
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EVERBOSE(3, "Error:: recv(%d) #%d - %s", sess->sess_sock, errno, strerror(errno)); |
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finiSession(sess); |
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return NULL; |
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} |
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} else { |
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sess = TASK_DATA(task); |
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assert(sess); |
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buf.msg_len = TASK_DATLEN(task) > sizeof basebuf ? sizeof basebuf : TASK_DATLEN(task); |
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memcpy(buf.msg_base, sess->sess_buf->msg_base, buf.msg_len); |
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} |
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cack = mqtt_readCONNECT(&buf, &sess->sess_ka, sess->sess_cid, sizeof sess->sess_cid, |
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sess->sess_user, sizeof sess->sess_user, sess->sess_pass, sizeof sess->sess_pass, |
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&sess->sess_will.topic, &sess->sess_will.msg); |
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ret = cack.retcode; |
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flg.flags = cack.reserved; |
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if (flg.reserved) { |
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EVERBOSE(3, "Error:: in MQTT protocol #%d - %s", mqtt_GetErrno(), mqtt_GetError()); |
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goto end; |
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} else { |
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sess->sess_clean = flg.clean_sess; |
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sess->sess_will.qos = flg.will_qos; |
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sess->sess_will.retain = flg.will_retain; |
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sess->sess_will.flag = flg.will_flg; |
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sess->sess_srv->timeout = sess->sess_ka; |
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} |
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/* check online table for user */ |
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if (call.LoginACC(&cfg, acc, sess->sess_user, sess->sess_pass) < 1) { |
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EVERBOSE(0, "Login:: DENIED for username %s and password %s", |
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sess->sess_user, sess->sess_pass); |
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ret = MQTT_RETCODE_DENIED; |
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goto end; |
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} else { |
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EVERBOSE(1, "Login:: ALLOWED for username %s ...", sess->sess_user); |
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ret = MQTT_RETCODE_ACCEPTED; |
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} |
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/* db management */ |
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if (call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%") > 0) { |
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EVERBOSE(2, "Old session %s should be disconnect!", sess->sess_cid); |
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TAILQ_FOREACH(s, &Sessions, sess_node) |
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if (!strcmp(s->sess_cid, sess->sess_cid)) { |
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/* found stale session & disconnect it! */ |
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sock = s->sess_sock; |
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schedCancelby(root, taskMAX, CRITERIA_FD, (void*) sock, NULL); |
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schedWrite(root, leaveClient, s, s->sess_sock, NULL, 0); |
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break; |
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} |
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} |
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if (call.InitSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, sess->sess_addr, |
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sess->sess_will.flag, sess->sess_will.topic, sess->sess_will.msg, |
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sess->sess_will.qos, sess->sess_will.retain) == -1) { |
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EVERBOSE(0, "Session %s DENIED for username %s", sess->sess_cid, sess->sess_user); |
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ret = MQTT_RETCODE_DENIED; |
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goto end; |
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} else { |
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EVERBOSE(0, "Session %s from %s and username %s is started", |
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sess->sess_cid, sess->sess_addr, sess->sess_user); |
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ret = MQTT_RETCODE_ACCEPTED; |
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} |
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/* clean/load session if requested */ |
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if (sess->sess_clean) { |
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if (call.DeletePUB_subscribe) |
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call.DeletePUB_subscribe(&cfg, pub, sess->sess_cid, "%", sess->sess_user, "%"); |
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if (call.WipePUB_topic) /* delete ALL messages */ |
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call.WipePUB_topic(&cfg, pub, sess->sess_cid, sess->sess_user, -1); |
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} else if (call.ReadPUB_subscribe) { |
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/* load subscribes */ |
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subs = call.ReadPUB_subscribe(&cfg, pub, sess->sess_cid, "%"); |
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loadSubscribes(sess, subs); |
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mqtt_subFree(&subs); |
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} |
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/* timer event for retain messages */ |
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if (call.ReadPUB_topic) |
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schedTimer(root, sendRetain, sess, ts, NULL, 0); |
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|
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/* Start session task OK ... */ |
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if (!schedRead(root, dispatchSession, sess, TASK_FD(task), NULL, 0)) { |
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ELIBERR(sched); |
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ret = MQTT_RETCODE_DENIED; |
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} else |
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TAILQ_INSERT_TAIL(&Sessions, sess, sess_node); |
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call.LOG(logg, "Session %s started from %s for user %s (timeout=%d) OK!\n", sess->sess_cid, |
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sess->sess_addr, sess->sess_user, sess->sess_ka); |
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end: /* close client connection */ |
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wlen = mqtt_msgCONNACK(sess->sess_buf, ret); |
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if ((wlen = send(TASK_FD(task), sess->sess_buf->msg_base, wlen, 0)) == -1) { |
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EVERBOSE(3, "Error:: send(%ld) #%d - %s", (long) TASK_FD(task), errno, strerror(errno)); |
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} else |
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EVERBOSE(5, "Sended %d bytes", wlen); |
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|
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if (ret != MQTT_RETCODE_ACCEPTED) { |
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EVERBOSE(1, "Close client %s with socket=%ld", sess->sess_addr, (long) TASK_FD(task)); |
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finiSession(sess); |
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} |
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return NULL; |
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} |
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static void * |
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acceptClient(sched_task_t *task) |
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{ |
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int cli; |
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sockaddr_t sa; |
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socklen_t sslen = sizeof sa.ss; |
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ait_val_t *v; |
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char str[STRSIZ]; |
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ETRACE(); |
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assert(task); |
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if ((cli = accept(TASK_FD(task), &sa.sa, &sslen)) == -1) |
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goto end; |
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else |
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fcntl(cli, F_SETFL, fcntl(cli, F_GETFL) | O_NONBLOCK); |
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v = ait_allocVar(); |
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if (!v) { |
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ELIBERR(elwix); |
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close(cli); |
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goto end; |
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} else { |
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memset(str, 0, sizeof str); |
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snprintf(str, sizeof str, "%s:%hu", e_n2addr(&sa, v), e_n2port(&sa)); |
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AIT_FREE_VAL(v); |
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AIT_SET_STR(v, str); |
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} |
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EVERBOSE(1, "Connected client with socket=%d from %s", cli, AIT_GET_STR(v)); |
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|
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if (!schedRead(root, startSession, v, cli, NULL, 0)) { |
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ait_freeVar(&v); |
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close(cli); |
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EVERBOSE(1, "Terminated client with socket=%d", cli); |
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} |
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end: |
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if (!schedRead(root, acceptClient, NULL, TASK_FD(task), NULL, 0)) |
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ELIBERR(sched); |
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return NULL; |
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} |
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|
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/* ----------------------------------------------------------------------- */ |
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int |
int |
Run(void) | Run(int sock) |
{ |
{ |
FTRACE(1); | struct tagSession *sess; |
| struct timespec pl = { 0, 100000000 }; |
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|
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ETRACE(); |
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|
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if (mqtt_srv_Listen(sock, 0, 1) == -1) { |
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ELIBERR(mqtt); |
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return -1; |
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} |
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|
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/* state machine - accept new connections */ |
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if (!schedRead(root, acceptClient, NULL, sock, NULL, 0)) { |
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ELIBERR(sched); |
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return -1; |
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} |
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|
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schedPolling(root, &pl, NULL); |
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schedRun(root, &Kill); |
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|
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schedCancelby(root, taskTIMER, CRITERIA_CALL, sendRetain, NULL); |
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|
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/* free all undeleted elements into lists */ |
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TAILQ_FOREACH(sess, &Sessions, sess_node) { |
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TAILQ_REMOVE(&Sessions, sess, sess_node); |
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|
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finiSession(sess); |
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} |
return 0; |
return 0; |
} |
} |