version 1.1.2.6, 2011/12/01 14:41:11
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version 1.5.2.2, 2013/07/16 14:34:58
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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 * |
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 * |
startSession(sched_task_t *task) |
startSession(sched_task_t *task) |
{ |
{ |
mqtt_msg_t *buf; | u_char basebuf[USHRT_MAX]; |
mqtt_cb_t cbs[MQTT_TYPE_MAX + 1] = { 0 }; | mqtt_msg_t buf = { basebuf, sizeof basebuf }; |
int ret = 0; | mqtthdr_connflgs_t flg; |
| mqtthdr_connack_t cack; |
| ait_val_t *v; |
| struct tagSession *s, *sess = NULL; |
| int ret, wlen; |
| mqtt_subscr_t *subs; |
| struct timespec ts = { RETAIN_TIMEOUT, 0 }; |
| intptr_t sock; |
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FTRACE(4); | ETRACE(); |
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buf = mqtt_msgAlloc(USHRT_MAX); | assert(task); |
if (!buf) { | |
syslog(LOG_ERR, "Error:: allocate message buf (%d) #%d - %s", (int) TASK_FD(task), | if (!TASK_DATA(task)) { |
mqtt_GetErrno(), mqtt_GetError()); | v = TASK_ARG(task); |
| /* flow from accept new clients */ |
| sess = initSession(TASK_FD(task), v); |
| ait_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) { |
| EVERBOSE(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) { |
| EVERBOSE(3, "Error:: in MQTT protocol #%d - %s", mqtt_GetErrno(), mqtt_GetError()); |
goto end; |
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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if (recv(TASK_FD(task), buf->msg_base, buf->msg_len, 0) == -1) { | /* check online table for user */ |
syslog(LOG_ERR, "Error:: recv(%d) #%d - %s", (int) TASK_FD(task), | if (call.LoginACC(&cfg, acc, sess->sess_user, sess->sess_pass) < 1) { |
errno, strerror(errno)); | EVERBOSE(0, "Login:: DENIED for username %s and password %s", |
mqtt_msgFree(&buf, 42); | sess->sess_user, sess->sess_pass); |
| ret = MQTT_RETCODE_DENIED; |
goto end; |
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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ret = mqttDispatcher(cbs, buf); | /* db management */ |
| if (call.FiniSessPUB(&cfg, pub, sess->sess_cid, sess->sess_user, "%") > 0) { |
| EVERBOSE(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! */ |
| sock = s->sess_sock; |
| schedCancelby(root, taskMAX, CRITERIA_FD, (void*) sock, NULL); |
| schedWrite(root, leaveClient, s, s->sess_sock, 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) { |
| EVERBOSE(0, "Session %s DENIED for username %s", sess->sess_cid, sess->sess_user); |
| ret = MQTT_RETCODE_DENIED; |
| goto end; |
| } else { |
| EVERBOSE(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) /* delete ALL messages */ |
| call.WipePUB_topic(&cfg, pub, sess->sess_cid, sess->sess_user, -1); |
| } else if (call.ReadPUB_subscribe) { |
| /* load subscribes */ |
| subs = call.ReadPUB_subscribe(&cfg, pub, sess->sess_cid, "%"); |
| loadSubscribes(sess, subs); |
| mqtt_subFree(&subs); |
| } |
|
|
mqtt_msgFree(&buf, 42); | /* timer event for retain messages */ |
| if (call.ReadPUB_topic) |
| schedTimer(root, sendRetain, sess, ts, NULL, 0); |
|
|
switch (ret) { | /* Start session task OK ... */ |
case -1: | if (!schedRead(root, dispatchSession, sess, TASK_FD(task), NULL, 0)) { |
syslog(LOG_ERR, "Error:: in MQTT protocol #%d - %s", mqtt_GetErrno(), mqtt_GetError()); | ELIBERR(sched); |
break; | ret = MQTT_RETCODE_DENIED; |
default: | } else |
return NULL; | TAILQ_INSERT_TAIL(&Sessions, sess, sess_node); |
} | |
| 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 */ |
end: /* close client connection */ |
close(TASK_FD(task)); | wlen = mqtt_msgCONNACK(sess->sess_buf, ret); |
VERB(1) syslog(LOG_DEBUG, "Close client %s with socket=%d", | if ((wlen = send(TASK_FD(task), sess->sess_buf->msg_base, wlen, 0)) == -1) { |
(char*) TASK_ARG(task), (int) TASK_FD(task)); | EVERBOSE(3, "Error:: send(%ld) #%d - %s", (long) TASK_FD(task), errno, strerror(errno)); |
if (TASK_ARG(task)) | } else |
free(TASK_ARG(task)); | EVERBOSE(5, "Sended %d bytes", wlen); |
| |
| if (ret != MQTT_RETCODE_ACCEPTED) { |
| EVERBOSE(1, "Close client %s with socket=%ld", sess->sess_addr, (long) TASK_FD(task)); |
| finiSession(sess); |
| } |
return NULL; |
return NULL; |
} |
} |
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/* ----------------------------------------------------------------------- */ |
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static void * |
static void * |
thrSched(void *arg __unused) | acceptClient(sched_task_t *task) |
{ |
{ |
FTRACE(1); | int cli; |
| sockaddr_t sa; |
| socklen_t sslen = sizeof sa.ss; |
| ait_val_t *v; |
| char str[STRSIZ]; |
|
|
schedRun(root, (intptr_t*) &Kill); | ETRACE(); |
pthread_exit(NULL); | |
| assert(task); |
| |
| if ((cli = accept(TASK_FD(task), &sa.sa, &sslen)) == -1) |
| goto end; |
| else |
| fcntl(cli, F_SETFL, fcntl(cli, F_GETFL) | O_NONBLOCK); |
| |
| v = ait_allocVar(); |
| if (!v) { |
| ELIBERR(elwix); |
| close(cli); |
| goto end; |
| } else { |
| memset(str, 0, sizeof str); |
| snprintf(str, sizeof str, "%s:%hu", e_n2addr(&sa, v), e_n2port(&sa)); |
| AIT_FREE_VAL(v); |
| AIT_SET_STR(v, str); |
| } |
| EVERBOSE(1, "Connected client with socket=%d from %s", cli, AIT_GET_STR(v)); |
| |
| if (!schedRead(root, startSession, v, cli, NULL, 0)) { |
| ait_freeVar(&v); |
| close(cli); |
| EVERBOSE(1, "Terminated client with socket=%d", cli); |
| } |
| end: |
| if (!schedRead(root, acceptClient, NULL, TASK_FD(task), NULL, 0)) |
| ELIBERR(sched); |
| return NULL; |
} |
} |
|
|
|
/* ----------------------------------------------------------------------- */ |
|
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int |
int |
Run(int sock) |
Run(int sock) |
{ |
{ |
io_sockaddr_t sa; | struct tagSession *sess; |
socklen_t sslen = sizeof sa.ss; | struct timespec pl = { 0, 100000000 }; |
int cli; | |
char *str = NULL, szAddr[STRSIZ] = { 0 }; | |
pthread_t tid; | |
|
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FTRACE(1); | ETRACE(); |
|
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if (pthread_create(&tid, NULL, thrSched, NULL)) { | if (mqtt_srv_Listen(sock, 0, 1) == -1) { |
syslog(LOG_ERR, "Error:: thread scheduler #%d - %s", errno, strerror(errno)); | ELIBERR(mqtt); |
return -1; |
return -1; |
} else | } |
pthread_detach(tid); | |
VERB(2) syslog(LOG_DEBUG, "Run scheduler management thread"); | |
|
|
if (listen(sock, SOMAXCONN) == -1) { | /* state machine - accept new connections */ |
syslog(LOG_ERR, "Error:: listen(%d) #%d - %s\n", sock, errno, strerror(errno)); | if (!schedRead(root, acceptClient, NULL, sock, NULL, 0)) { |
pthread_cancel(tid); | ELIBERR(sched); |
return -1; |
return -1; |
} |
} |
|
|
while (!Kill) { | schedPolling(root, &pl, NULL); |
if ((cli = accept(sock, &sa.sa, &sslen)) == -1) { | schedRun(root, &Kill); |
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); | |
} | |
|
|
if (!schedRead(root, startSession, str, cli)) { | schedCancelby(root, taskTIMER, CRITERIA_CALL, sendRetain, NULL); |
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(sess, &Sessions, sess_node) { |
|
TAILQ_REMOVE(&Sessions, sess, sess_node); |
|
|
|
finiSession(sess); |
|
} |
return 0; |
return 0; |
} |
} |