#include "global.h" #include "rtlm.h" #include "utils.h" #include "mqttd.h" 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) { ioDEBUG(3, "Error:: in malloc #%d - %s", errno, strerror(errno)); io_freeVar(v); return NULL; } else memset(sess, 0, sizeof(struct tagSession)); str = (const char*) cfg_GetAttribute(&cfg, CFG("mqttd"), CFG("retry")); if (!str) sess->sess_retry = DEFAULT_RETRY; else sess->sess_retry = strtol(str, NULL, 0); sess->sess_buf = mqtt_msgAlloc(0); if (!sess->sess_buf) { ioDEBUG(3, "Error:: in msgAlloc #%d - %s", mqtt_GetErrno(), mqtt_GetError()); free(sess); io_freeVar(v); return NULL; } sess->sess_sock = sock; strlcpy(sess->sess_addr, (char*) AIT_GET_STR(v), sizeof sess->sess_addr); io_freeVar(v); return sess; } static void finiSession(struct tagSession *sess) { register int i; struct tagStore *store; ioTRACE(5); if (!sess) return; for (i = 0; i < MQTT_QOS_RESERVED; i++) while ((store = SLIST_FIRST(&sess->sess_store[i]))) { SLIST_REMOVE_HEAD(&sess->sess_store[i], st_node); 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_msgFree(&sess->sess_buf, 42); free(sess); } static void stopSession(struct tagSession *sess) { mqtt_msg_t msg = { NULL, 0 }; int ret; pthread_mutex_lock(&mtx_sess); TAILQ_REMOVE(&Sessions, sess, sess_node); pthread_mutex_unlock(&mtx_sess); ret = mqtt_msgDISCONNECT(&msg); if ((ret = send(sess->sess_sock, msg.msg_base, ret, 0)) == -1) ioDEBUG(3, "Error:: send(%d) #%d - %s", sess->sess_sock, errno, strerror(errno)); else { ioDEBUG(5, "Sended %d bytes for disconnect", ret); free(msg.msg_base); msg.msg_len = 0; } ioDEBUG(1, "Close socket=%d", sess->sess_sock); finiSession(sess); } static void * thrSession(struct tagSession *sess) { pthread_cleanup_push((void(*)(void*)) stopSession, sess); ioTRACE(2); pthread_cleanup_pop(42); pthread_exit(NULL); } static void * startSession(sched_task_t *task) { u_char basebuf[USHRT_MAX]; mqtt_msg_t msg = { NULL, 0 }, buf = { basebuf, sizeof basebuf }; mqtthdr_connflgs_t flg; mqtthdr_connack_t cack; struct tagSession *s, *sess = NULL; int ret; pthread_attr_t attr; ioTRACE(4); sess = initSession(TASK_FD(task), TASK_ARG(task)); if (!sess) { io_freeVar(TASK_ARG(task)); 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; } 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; } /* 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 { ioDEBUG(1, "Login:: ALLOWED for username %s ...", sess->sess_user); ret = MQTT_RETCODE_ACCEPTED; } 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)) { stopSession(s); 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; } ret = mqtt_msgCONNACK(&msg, ret); if ((ret = send(sess->sess_sock, msg.msg_base, ret, 0)) == -1) { ioDEBUG(3, "Error:: send(%d) #%d - %s", sess->sess_sock, errno, strerror(errno)); finiSession(sess); return NULL; } else { ioDEBUG(5, "Sended %d bytes", ret); free(msg.msg_base); msg.msg_len = 0; } /* Start session thread OK ... */ pthread_attr_init(&attr); pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); pthread_mutex_lock(&mtx_sess); TAILQ_INSERT_TAIL(&Sessions, sess, sess_node); pthread_create(&sess->sess_tid, &attr, (void*(*)(void*)) thrSession, sess); pthread_mutex_unlock(&mtx_sess); call.LOG(logg, "Session %s started from %s for user %s OK!\n", sess->sess_cid, sess->sess_addr, sess->sess_user); pthread_attr_destroy(&attr); return NULL; end: /* close client connection */ ret = mqtt_msgCONNACK(&msg, ret); if ((ret = send(sess->sess_sock, msg.msg_base, ret, 0)) == -1) { ioDEBUG(3, "Error:: send(%d) #%d - %s", sess->sess_sock, errno, strerror(errno)); } else { ioDEBUG(5, "Sended %d bytes", ret); free(msg.msg_base); msg.msg_len = 0; } ioDEBUG(1, "Close client %s with socket=%d", sess->sess_addr, sess->sess_sock); finiSession(sess); return NULL; } /* ----------------------------------------------------------------------- */ static void * thrSched(void *arg __unused) { struct tagSession *sess; ioTRACE(1); schedRun(root, &Kill); TAILQ_FOREACH(sess, &Sessions, sess_node) if (sess->sess_tid) pthread_cancel(sess->sess_tid); pthread_exit(NULL); } int Run(int sock) { io_sockaddr_t sa; socklen_t sslen = sizeof sa.ss; int cli; pthread_t tid; ait_val_t *v; char str[STRSIZ]; ioTRACE(1); if (pthread_create(&tid, NULL, thrSched, NULL)) { ioLOGERR(0); return -1; } else pthread_detach(tid); ioDEBUG(2, "Run scheduler management thread"); if (listen(sock, SOMAXCONN) == -1) { ioLOGERR(0); return -1; } while (!Kill) { if ((cli = accept(sock, &sa.sa, &sslen)) == -1) { if (!Kill) continue; ioLOGERR(0); break; } v = io_allocVar(); if (!v) { ioLIBERR(mqtt); break; } else { memset(str, 0, sizeof str); snprintf(str, sizeof str, "%s:%hu", io_n2addr(&sa, v), io_n2port(&sa)); 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)) { io_freeVar(v); close(cli); ioDEBUG(1, "Terminated client with socket=%d", cli); } } return 0; }