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mqtt.c
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mqtt.c
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/* Copyright (c) 2017 Unwired Devices LLC [info@unwds.com]
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <mosquitto.h>
#include <pthread.h>
#include <time.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <syslog.h>
#include <sys/msg.h>
#include <sys/queue.h>
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
#include "mqtt.h"
#include "unwds-mqtt.h"
#include "utils.h"
#define VERSION "2.3.1"
#define MAX_PENDING_NODES 1000
#define INVITE_TIMEOUT_S 45
#define NUM_RETRIES 5
#define NUM_RETRIES_INV 5
#define UART_POLLING_INTERVAL 100 // milliseconds
#define QUEUE_POLLING_INTERVAL 5 // milliseconds
#define REPLY_LEN 1024
int msgqid;
extern int errno;
struct msg_buf {
long mtype;
char mtext[REPLY_LEN];
} msg_rx;
static struct mosquitto *mosq = NULL;
static int uart = 0;
static pthread_t publisher_thread;
static pthread_t reader_thread;
static pthread_t pending_thread;
static pthread_mutex_t mutex_uart;
static pthread_mutex_t mutex_pending;
static uint8_t mqtt_format;
static int tx_delay;
static int tx_maxretr;
char logbuf[REPLY_LEN + 100];
typedef struct entry {
TAILQ_ENTRY(entry) entries; /* Circular queue. */
char buf[REPLY_LEN];
} cq_entry_t;
TAILQ_HEAD(TAILQ, entry) inputq;
typedef struct TAILQ fifo_t;
static bool m_enqueue(fifo_t *l, char *v);
static bool m_dequeue(fifo_t *l, char *v);
static bool is_fifo_empty(fifo_t *l);
/* Pending messages queue pool */
static bool pending_free[MAX_PENDING_NODES];
typedef struct {
uint64_t nodeid;
fifo_t pending_fifo;
time_t last_msg;
time_t last_inv;
unsigned short nodeclass;
bool has_been_invited;
bool can_send;
unsigned short num_retries;
unsigned short num_pending;
} pending_item_t;
static pending_item_t pending[MAX_PENDING_NODES];
/* The devices list is requested for gate needs, so don't post in MQTT it's results */
static bool list_for_gate = false;
static bool devlist_needed = false;
static void devices_list(bool internal);
/* If too many pings was skipped by gate, the connection might be faulty */
/*
static int pings_skipped = 0;
static const int MIN_PINGS_SKIPPED = 10;
*/
static bool static_devices_list_sent = false;
static char *get_node_class(unsigned short nodeclass) {
switch (nodeclass) {
case 0:
return "A";
case 1:
return "B";
case 2:
return "C";
default:
return "?";
}
}
static void init_pending(void) {
int i;
for (i = 0; i < MAX_PENDING_NODES; i++) {
pending_free[i] = true;
pending[i].nodeid = 0;
pending[i].nodeclass = 0;
pending[i].last_msg = 0;
pending[i].last_inv = 0;
pending[i].num_retries = 0;
pending[i].can_send = false;
pending[i].num_pending = 0;
}
}
static pending_item_t *pending_to_nodeid(uint64_t nodeid) {
int i;
for (i = 0; i < MAX_PENDING_NODES; i++) {
if (pending_free[i])
continue;
if (pending[i].nodeid == nodeid) {
return &pending[i];
}
}
return NULL;
}
static bool add_device(uint64_t nodeid, unsigned short nodeclass, bool was_joined) {
pthread_mutex_lock(&mutex_pending);
pending_item_t *e = pending_to_nodeid(nodeid);
/* Update device info for existing record */
if (e != NULL) {
/* Clear invitation flag */
if (nodeclass == LS_ED_CLASS_C && e->has_been_invited && was_joined) {
snprintf(logbuf, sizeof(logbuf), "[+] Device successfully invited");
logprint(logbuf);
/* tx_delay pause before sending any messages to the invited device */
e->last_msg = time(NULL);
e->has_been_invited = false;
}
e->nodeclass = nodeclass;
pthread_mutex_unlock(&mutex_pending);
/* Reset number of retransmission/invite attempts */
e->num_retries = 0;
return true;
}
int i;
for (i = 0; i < MAX_PENDING_NODES; i++) {
/* Free cell found, occupy */
if (pending_free[i]) {
pending_free[i] = false;
/* Initialize cell */
pending[i].nodeid = nodeid;
pending[i].nodeclass = nodeclass;
pending[i].has_been_invited = !was_joined; /* Node added without actual join via invitation */
pending[i].last_msg = 0;
pending[i].last_inv = 0;
pending[i].num_retries = 0;
pending[i].can_send = false;
pending[i].num_pending = 0;
/* Initialize queue in cell */
TAILQ_INIT(&pending[i].pending_fifo);
pthread_mutex_unlock(&mutex_pending);
return true;
}
}
pthread_mutex_unlock(&mutex_pending);
return false;
}
static bool kick_device(uint64_t nodeid) {
pthread_mutex_lock(&mutex_pending);
int i;
for (i = 0; i < MAX_PENDING_NODES; i++) {
if (pending_free[i])
continue;
if (pending[i].nodeid != nodeid)
continue;
/* Device found, kick */
pending_free[i] = true;
/* Empty the pending queue */
while (m_dequeue(&pending[i].pending_fifo, NULL)) {}
pthread_mutex_unlock(&mutex_pending);
return true;
}
pthread_mutex_unlock(&mutex_pending);
return false;
}
static bool m_enqueue(fifo_t *l, char *v)
{
cq_entry_t *val;
val = (cq_entry_t *)malloc(sizeof(cq_entry_t));
if (val != NULL) {
memcpy(val->buf, v, strlen(v)+1);
TAILQ_INSERT_TAIL(l, val, entries);
return true;
}
return false;
}
static bool m_dequeue(fifo_t *l, char *v)
{
cq_entry_t *e = l->tqh_first;
if (e != NULL) {
if (v != NULL)
memcpy(v, e->buf, strlen(e->buf)+1);
TAILQ_REMOVE(l, e, entries);
free(e);
e = NULL;
return true;
}
return false;
}
static bool m_peek(fifo_t *l, char *v)
{
cq_entry_t *e = l->tqh_first;
if (e != NULL) {
if (v != NULL)
memcpy(v, e->buf, strlen(e->buf)+1);
else
return false; /* Makes no sense to peek into NULL buffer */
return true;
}
return false;
}
static bool is_fifo_empty(fifo_t *l)
{
if (l->tqh_first == NULL)
return true;
return false;
}
static int set_interface_attribs (int fd, int speed, int parity)
{
struct termios tty;
memset (&tty, 0, sizeof tty);
if (tcgetattr (fd, &tty) != 0)
{
fprintf(stderr, "error %d from tcgetattr", errno);
return -1;
}
cfsetospeed (&tty, speed);
cfsetispeed (&tty, speed);
tty.c_cflag = (tty.c_cflag & ~CSIZE) | CS8; // 8-bit chars
// disable IGNBRK for mismatched speed tests; otherwise receive break
// as \000 chars
// tty.c_iflag &= ~IGNBRK; // disable break processing
tty.c_iflag |= IGNBRK; // disable break processing
tty.c_lflag = 0; // no signaling chars, no echo,
// no canonical processing
tty.c_oflag = 0; // no remapping, no delays
tty.c_cc[VMIN] = 0; // read doesn't block
tty.c_cc[VTIME] = 5; // 0.5 seconds read timeout
tty.c_iflag &= ~(IXON | IXOFF | IXANY); // shut off xon/xoff ctrl
tty.c_cflag |= (CLOCAL | CREAD);// ignore modem controls,
// enable reading
tty.c_cflag &= ~(PARENB | PARODD); // shut off parity
tty.c_cflag |= parity;
tty.c_cflag &= ~CSTOPB;
tty.c_cflag &= ~CRTSCTS;
if (tcsetattr (fd, TCSANOW, &tty) != 0)
{
fprintf(stderr, "error %d from tcsetattr\n", errno);
return -1;
}
return 0;
}
static void set_blocking (int fd, int should_block)
{
struct termios tty;
memset (&tty, 0, sizeof tty);
if (tcgetattr (fd, &tty) != 0)
{
fprintf(stderr, "error %d from tggetattr", errno);
return;
}
tty.c_cc[VMIN] = should_block ? 1 : 0;
tty.c_cc[VTIME] = 5; // 0.5 seconds read timeout
if (tcsetattr (fd, TCSANOW, &tty) != 0)
fprintf(stderr, "error %d setting term attributes", errno);
}
static void serve_reply(char *str) {
puts("[info] Gate reply received");
/*
if (strlen(str) > REPLY_LEN * 2) {
puts("[error] Received too long reply from the gate");
return;
}
*/
gate_reply_type_t reply = (gate_reply_type_t)str[0];
str += 1;
char *str_orig = str;
switch (reply) {
case REPLY_LIST: {
puts("[info] Reply type: REPLY_LIST");
/* Read EUI64 */
char addr[17] = {};
memcpy(addr, str, 16);
str += 16;
uint64_t nodeid;
if (!hex_to_bytes(addr, (uint8_t *) &nodeid, !is_big_endian())) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse list reply: %s\n", str_orig);
logprint(logbuf);
return;
}
/* Read APPID64 */
char appid[17] = {};
memcpy(appid, str, 16);
str += 16;
uint64_t appid64;
if (!hex_to_bytes(appid, (uint8_t *) &appid64, !is_big_endian())) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse list reply: %s\n", str_orig);
logprint(logbuf);
return;
}
/* Read last seen time */
char lastseen[5] = {};
memcpy(lastseen, str, 4);
str += 4;
uint16_t lseen;
if (!hex_to_bytes(lastseen, (uint8_t *) &lseen, !is_big_endian())) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse list reply: %s\n", str_orig);
logprint(logbuf);
return;
}
/* Read nodeclass */
char nodeclass[5] = {};
memcpy(nodeclass, str, 4);
str += 4;
uint16_t cl;
if (!hex_to_bytes(nodeclass, (uint8_t *) &cl, !is_big_endian())) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse list reply: %s\n", str_orig);
logprint(logbuf);
return;
}
/* Refresh our internal device list info for that node */
if (!add_device(nodeid, cl, true)) {
snprintf(logbuf, sizeof(logbuf), "[error] Was unable to add device 0x%s with nodeclass %s to our device list!\n", addr, nodeclass);
logprint(logbuf);
return;
}
/* The device list was requested by gate, don't post results in MQTT then */
if (list_for_gate)
return;
char *msg = (char *) malloc(MQTT_MAX_MSG_SIZE);
if (msg) {
snprintf(msg, MQTT_MAX_MSG_SIZE, "{ \"appid64\": \"0x%s\", \"last_seen\": %d, \"nodeclass\": %d }",
appid, (unsigned) lseen, (unsigned) cl);
publish_mqtt_message(mosq, addr, "list/", msg, (mqtt_format_t) mqtt_format);
free(msg);
}
}
break;
case REPLY_IND: {
puts("[info] Reply type: REPLY_IND");
char addr[17] = {};
memcpy(addr, str, 16);
str += 16;
uint64_t nodeid;
if (!hex_to_bytes(addr, (uint8_t *) &nodeid, !is_big_endian())) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse device app. data: %s", str_orig);
logprint(logbuf);
return;
}
int16_t rssi;
if (!hex_to_bytesn(str, 4, (uint8_t *) &rssi, !is_big_endian())) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse RSSI from gate reply: %s\n", str);
logprint(logbuf);
return;
}
/* Skip RSSI hex */
str += 4;
uint8_t status;
if (!hex_to_bytesn(str, 2, &status, !is_big_endian())) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse status from gate reply: %s\n", str);
logprint(logbuf);
return;
}
/* Skip status hex */
str += 2;
uint8_t bytes[REPLY_LEN] = {};
if (!hex_to_bytes(str, (uint8_t *) &bytes, false)) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse payload bytes gate reply: \"%s\" | len: %zu\n", str, strlen(str));
logprint(logbuf);
return;
}
int moddatalen = strlen(str + 1) / 2;
uint8_t modid = bytes[0];
uint8_t *moddata = bytes + 1;
char *topic = (char *)malloc(64);
if (!topic) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
return;
}
char *msg = (char *)malloc(MQTT_MAX_MSG_SIZE);
if (!msg) {
free(topic);
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
return;
}
mqtt_msg_t *mqtt_msg = (mqtt_msg_t *)malloc(MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
if (!mqtt_msg) {
free(msg);
free(topic);
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
return;
}
memset((void *)mqtt_msg, 0, MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
mqtt_status_t mqtt_status;
mqtt_status.rssi = rssi;
mqtt_status.battery = 2000 + (50*(status & 0x1F));
mqtt_status.temperature = 20*(status >> 5) - 30;
if (modid == UNWDS_MODULE_NOT_FOUND) {
strcpy(topic, "device");
strcat(mqtt_msg[0].name, "error");
char mqtt_val[50];
snprintf(mqtt_val, 50, "module ID %d is not available", moddata[0]);
strcat(mqtt_msg[0].value, mqtt_val);
} else {
if (!convert_to(modid, moddata, moddatalen, topic, mqtt_msg)) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to convert gate reply \"%s\" for module %d\n", str, modid);
logprint(logbuf);
free(topic);
free(msg);
free(mqtt_msg);
return;
}
}
build_mqtt_message(msg, mqtt_msg, mqtt_status, addr);
publish_mqtt_message(mosq, addr, topic, msg, (mqtt_format_t) mqtt_format);
free(topic);
free(msg);
free(mqtt_msg);
}
break;
case REPLY_JOIN: {
puts("[info] Reply type: REPLY_JOIN");
char addr[17] = {};
memcpy(addr, str, 16);
str += 16;
uint64_t nodeid;
if (!hex_to_bytes(addr, (uint8_t *) &nodeid, !is_big_endian())) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse join reply: %s", str_orig);
logprint(logbuf);
return;
}
unsigned short nodeclass = atoi(str);
char *cl = get_node_class(nodeclass);
snprintf(logbuf, sizeof(logbuf), "[join] Joined device with id = 0x%" PRIx64 " and class = %s\n",
nodeid, cl);
logprint(logbuf);
mqtt_msg_t *mqtt_msg = (mqtt_msg_t *)malloc(MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
if (!mqtt_msg) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
return;
}
memset((void *)mqtt_msg, 0, MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
add_value_pair(mqtt_msg, "joined", "1");
add_value_pair(mqtt_msg, "class", cl);
mqtt_status_t status = { 0 };
char *msg = (char *)malloc(MQTT_MAX_MSG_SIZE);
if (!msg) {
free(mqtt_msg);
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
return;
}
build_mqtt_message(msg, mqtt_msg, status, addr);
publish_mqtt_message(mosq, addr, "device", msg, (mqtt_format_t) mqtt_format);
free(msg);
free(mqtt_msg);
add_device(nodeid, nodeclass, true);
pending_item_t *e = pending_to_nodeid(nodeid);
if (e != NULL) {
/* If device is rejoined, check the pending messages */
if (e->num_pending) {
/* Notify gate about pending messages */
pthread_mutex_lock(&mutex_uart);
dprintf(uart, "%c%" PRIx64 "%02x\r", CMD_HAS_PENDING,
nodeid, e->num_pending);
pthread_mutex_unlock(&mutex_uart);
}
}
}
break;
case REPLY_KICK: {
puts("[info] Reply type: REPLY_KICK");
char addr[17] = {};
memcpy(addr, str, 16);
str += 16;
uint64_t nodeid;
if (!hex_to_bytes(addr, (uint8_t *) &nodeid, !is_big_endian())) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse kick packet: %s", str_orig);
logprint(logbuf);
return;
}
pending_item_t *e = pending_to_nodeid(nodeid);
if (e == NULL)
break;
if (kick_device(nodeid)) {
snprintf(logbuf, sizeof(logbuf), "[kick] Device with id = 0x%" PRIx64 " kicked due to long silence\n", nodeid);
logprint(logbuf);
mqtt_msg_t *mqtt_msg = (mqtt_msg_t *)malloc(MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
if (!mqtt_msg) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
return;
}
memset((void *)mqtt_msg, 0, MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
add_value_pair(mqtt_msg, "joined", "0");
mqtt_status_t status = { 0 };
char *msg = (char *)malloc(MQTT_MAX_MSG_SIZE);
if (!msg) {
free(mqtt_msg);
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
return;
}
build_mqtt_message(msg, mqtt_msg, status, addr);
publish_mqtt_message(mosq, addr, "device", msg, (mqtt_format_t) mqtt_format);
free(msg);
free(mqtt_msg);
}
}
break;
case REPLY_ACK: {
puts("[info] Reply type: REPLY_ACK");
char addr[17] = {};
memcpy(addr, str, 16);
str += 16;
uint64_t nodeid;
if (!hex_to_bytes(addr, (uint8_t *) &nodeid, !is_big_endian())) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse ack: %s", str_orig);
logprint(logbuf);
return;
}
snprintf(logbuf, sizeof(logbuf), "[ack] ACK received from %" PRIx64 "\n", nodeid);
logprint(logbuf);
pending_item_t *e = pending_to_nodeid(nodeid);
if (e == NULL)
break;
pthread_mutex_lock(&mutex_pending);
/* No need to invite device */
e->has_been_invited = false;
/* Dequeue pending message */
if (!is_fifo_empty(&e->pending_fifo))
m_dequeue(&e->pending_fifo, NULL);
if (e->num_pending > 0)
e->num_pending--;
e->num_retries = 0;
pthread_mutex_unlock(&mutex_pending);
}
break;
case REPLY_PENDING_REQ: {
puts("[info] Reply type: REPLY_PENDING_REQ");
char addr[17] = {};
memcpy(addr, str, 16);
str += 16;
uint64_t nodeid;
if (!hex_to_bytes(addr, (uint8_t *) &nodeid, !is_big_endian())) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to parse pending frames request data: %s", str_orig);
logprint(logbuf);
return;
}
pending_item_t *e = pending_to_nodeid(nodeid);
if (e != NULL) {
/* Check if there's pending frames for this class A device */
if (e->nodeclass == LS_ED_CLASS_A && e->num_pending > 0) {
snprintf(logbuf, sizeof(logbuf), "[pending] Gate requested next pending frame for 0x%" PRIx64 "\n", nodeid);
logprint(logbuf);
pthread_mutex_lock(&mutex_pending);
e->can_send = true;
e->last_msg = 0; /* Force immediate sending */
pthread_mutex_unlock(&mutex_pending);
}
}
}
break;
default:
puts("[error] Reply type: unknown reply type");
break;
}
}
static void invite_mote(uint64_t addr)
{
snprintf(logbuf, sizeof(logbuf), "[inv] Sending invitation to node with address 0x%" PRIx64 "\n", addr);
logprint(logbuf);
mqtt_msg_t *mqtt_msg = (mqtt_msg_t *)malloc(MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
if (!mqtt_msg) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
return;
}
memset((void *)mqtt_msg, 0, MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
add_value_pair(mqtt_msg, "invited", "1");
add_value_pair(mqtt_msg, "message", "sending invitation to the node");
mqtt_status_t status = { 0 };
char *msg = (char *)malloc(MQTT_MAX_MSG_SIZE);
if (!msg) {
free(mqtt_msg);
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
return;
}
char hexbuf[40];
snprintf(hexbuf, sizeof(hexbuf), "%" PRIx64, addr);
build_mqtt_message(msg, mqtt_msg, status, hexbuf);
publish_mqtt_message(mosq, hexbuf, "device", msg, (mqtt_format_t) mqtt_format);
free(msg);
free(mqtt_msg);
pthread_mutex_lock(&mutex_uart);
dprintf(uart, "%c%" PRIx64 "\r", CMD_INVITE, addr);
pthread_mutex_unlock(&mutex_uart);
}
static void* pending_worker(void *arg) {
(void) arg;
while (1) {
pthread_mutex_lock(&mutex_pending);
int i;
for (i = 0; i < MAX_PENDING_NODES; i++) {
if (pending_free[i]) {
continue;
}
pending_item_t *e = &pending[i];
time_t current = time(NULL);
if (is_fifo_empty(&e->pending_fifo)) {
continue;
}
/* Messages for Class A devices will be sent only on demand */
if (e->nodeclass == LS_ED_CLASS_A && !e->can_send) {
continue;
}
/* Must wait for device to join before sending messages */
if (e->nodeclass == LS_ED_CLASS_C && e->has_been_invited) {
if (e->num_retries > NUM_RETRIES_INV) {
snprintf(logbuf, sizeof(logbuf), "[fail] Unable to invite node 0x%" PRIx64 " to network after %u attempts, giving up\n", e->nodeid, NUM_RETRIES_INV);
logprint(logbuf);
mqtt_msg_t *mqtt_msg = (mqtt_msg_t *)malloc(MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
if (!mqtt_msg) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
continue;
}
memset((void *)mqtt_msg, 0, MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
add_value_pair(mqtt_msg, "invited", "0");
add_value_pair(mqtt_msg, "message", "failed to invite node");
mqtt_status_t status = { 0 };
char *msg = (char *)malloc(MQTT_MAX_MSG_SIZE);
if (!msg) {
free(mqtt_msg);
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
continue;
}
char hexbuf[40];
snprintf(hexbuf, 40, "%" PRIx64, e->nodeid);
build_mqtt_message(msg, mqtt_msg, status, hexbuf);
publish_mqtt_message(mosq, hexbuf, "device", msg, (mqtt_format_t) mqtt_format);
free(msg);
free(mqtt_msg);
e->num_retries = 0;
m_dequeue(&e->pending_fifo, NULL);
} else
if (current - e->last_inv > e->num_retries * INVITE_TIMEOUT_S) {
/* Retry invitation */
invite_mote(e->nodeid);
e->num_retries++;
e->last_inv = current;
if (e->num_retries <= NUM_RETRIES_INV) {
snprintf(logbuf, sizeof(logbuf), "[inv] [%d/%d] Next invitation retry after %d seconds\n",
e->num_retries, NUM_RETRIES_INV, e->num_retries * INVITE_TIMEOUT_S);
logprint(logbuf);
}
}
continue;
}
if (current - e->last_msg > tx_delay) {
if (e->num_retries > NUM_RETRIES) {
snprintf(logbuf, sizeof(logbuf), "[fail] Unable to send message to 0x%" PRIx64 " after %u attempts, giving up\n",
e->nodeid, NUM_RETRIES);
logprint(logbuf);
mqtt_msg_t *mqtt_msg = (mqtt_msg_t *)malloc(MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
if (!mqtt_msg) {
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
continue;
}
memset((void *)mqtt_msg, 0, MQTT_MSG_MAX_NUM * sizeof(mqtt_msg_t));
add_value_pair(mqtt_msg, "sent", "0");
add_value_pair(mqtt_msg, "message", "failed to send message to the node");
mqtt_status_t status = { 0 };
char *msg = (char *)malloc(MQTT_MAX_MSG_SIZE);
if (!msg) {
free(mqtt_msg);
snprintf(logbuf, sizeof(logbuf), "[error] Unable to allocate memory\n");
logprint(logbuf);
continue;
}
char hexbuf[40];
snprintf(hexbuf, 40, "%" PRIx64, e->nodeid);
build_mqtt_message(msg, mqtt_msg, status, hexbuf);
publish_mqtt_message(mosq, hexbuf, "device", msg, (mqtt_format_t) mqtt_format);
free(msg);
free(mqtt_msg);
e->num_retries = 0;
m_dequeue(&e->pending_fifo, NULL);
continue;
}
char buf[REPLY_LEN] = {};
if (!m_peek(&e->pending_fifo, buf)) /* Peek message from queue but don't remove. Will be removed on acknowledge */
continue;
snprintf(logbuf, sizeof(logbuf), "[pending] [%d/%d] Sending message to 0x%" PRIx64 ": %s\n",
e->num_retries + 1, (e->num_retries < tx_maxretr) ? tx_maxretr : NUM_RETRIES,
e->nodeid, buf);
logprint(logbuf);
e->num_retries++;
/* Send */
pthread_mutex_lock(&mutex_uart);
dprintf(uart, "%s\r", buf);
pthread_mutex_unlock(&mutex_uart);
/* Send invitation after tx_maxretr retransmissions */
if (e->nodeclass == LS_ED_CLASS_C && e->num_retries == tx_maxretr) {
e->num_retries = 1;
e->last_inv = current;
e->has_been_invited = true;
}
e->can_send = false;
e->last_msg = current;
}
}
pthread_mutex_unlock(&mutex_pending);
usleep(1e3 * QUEUE_POLLING_INTERVAL);
}
return 0;
}
/* Publishes messages into MQTT */
static void *publisher(void *arg)
{
while(1) {
/* Wait for a message to arrive */
if (msgrcv(msgqid, &msg_rx, sizeof(msg_rx.mtext), 0, 0) < 0) {
puts("[error] Failed to receive internal message");
continue;
} else {
puts("[info] Internal message received");
}
serve_reply(msg_rx.mtext);
}
return NULL;
}
#define STATIC_DEVS_LIST_FILE "/etc/lora-mqtt/static-devs.conf"
/*
* Devices list format:
*
* # comment
* <eui64> <appid64> <network address> <device nonce> <channel>
*
* All numbers are in hex with zero padding if required.
* Device nonce is a random secret that must be set on the end-device.
* Channel is usually zero (one channel gate).
*
* Example:
* abababababababab 0000000000000001 00000000 abababab 00
*
* NB: each device line must be 54 characters long
*
*/
static void send_static_devices_list(void) {
/* Clear list */
pthread_mutex_lock(&mutex_uart);
dprintf(uart, "%c\r", CMD_KICK_ALL_STATIC);
pthread_mutex_unlock(&mutex_uart);
/* Send list of statically personalized devices */
FILE *list = fopen(STATIC_DEVS_LIST_FILE, "r");
int num = 0;
if (list)
{
char line[255];
while(fgets(line, 254, list) != NULL)
{
if (line[0] != '#' && strlen(line) >= 54) /* 54 characters long line + '\n' character */
{
uint8_t eui64[32];
uint8_t appid64[32];
uint8_t addr[32];
uint8_t devnonce[32];
uint8_t nochannel[32];
sscanf(line, "%s %s %s %s %s", eui64, appid64, addr, devnonce, nochannel);
/* Send item to the gate */
pthread_mutex_lock(&mutex_uart);
dprintf(uart, "%c%s%s%s%s%s\r", CMD_ADD_STATIC_DEV, eui64, appid64, addr, devnonce, nochannel);
pthread_mutex_unlock(&mutex_uart);
num++;
}
}
fclose(list);
} else {
snprintf(logbuf, sizeof(logbuf), "[gate] No statically personalized devices list found (%s)", STATIC_DEVS_LIST_FILE);
logprint(logbuf);