I am trying to write a simple application to publish messages over MQTT to an AWS IoT-Core broker. I started with the MQTT_Simple and AWS_FOTA examples. When trying to do the mqtt_connect I am getting a -45 error code. My code is as follows:
/* * Copyright (c) 2019 Nordic Semiconductor ASA * * SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic */ #include <zephyr.h> #include <stdio.h> #include <uart.h> #include <string.h> #include <at_cmd.h> #include <lte_lc.h> #include <net/mqtt.h> #include <net/socket.h> //#include <net/aws_fota.h> #include <dfu/mcuboot.h> #include <misc/reboot.h> #if defined(CONFIG_BSD_LIBRARY) #include "nrf_inbuilt_key.h" #endif #include "certificates.h" #if !defined(CONFIG_CLOUD_CLIENT_ID) #define IMEI_LEN 15 #define CLIENT_ID_LEN (IMEI_LEN + 4) #else #define CLIENT_ID_LEN (sizeof(CONFIG_CLOUD_CLIENT_ID) - 1) #endif static u8_t client_id_buf[CLIENT_ID_LEN+1]; /* The mqtt client struct */ static struct mqtt_client client; /* Buffers for MQTT client. */ static u8_t rx_buffer[CONFIG_MQTT_MESSAGE_BUFFER_SIZE]; static u8_t tx_buffer[CONFIG_MQTT_MESSAGE_BUFFER_SIZE]; static u8_t payload_buf[CONFIG_MQTT_PAYLOAD_BUFFER_SIZE]; /* MQTT Broker details. */ static struct sockaddr_storage broker_storage; /* File descriptor */ static struct pollfd fds; /* Set to true when application should teardown and reboot */ static bool do_reboot; #if defined(CONFIG_BSD_LIBRARY) /**@brief Recoverable BSD library error. */ void bsd_recoverable_error_handler(uint32_t err) { printk("bsdlib recoverable error: %u\n", err); } /**@brief Irrecoverable BSD library error. */ void bsd_irrecoverable_error_handler(uint32_t err) { printk("bsdlib irrecoverable error: %u\n", err); __ASSERT_NO_MSG(false); } #endif /* defined(CONFIG_BSD_LIBRARY) */ /**@brief Function to print strings without null-termination. */ static void data_print(u8_t *prefix, u8_t *data, int len) { char buf[len + 1]; memcpy(buf, data, len); buf[len] = 0; printk("%s%s\n", prefix, buf); } /**@brief Function to read the published payload. */ static int publish_get_payload(struct mqtt_client *c, u8_t *write_buf, size_t length) { u8_t *buf = write_buf; u8_t *end = buf + length; if (length > sizeof(payload_buf)) { return -EMSGSIZE; } while (buf < end) { int ret = mqtt_read_publish_payload_blocking(c, buf, end - buf); if (ret < 0) { return ret; } else if (ret == 0) { return -EIO; } buf += ret; } return 0; } /**@brief Function to publish data on the configured topic */ static int data_publish(struct mqtt_client *c, enum mqtt_qos qos, float data) { struct mqtt_publish_param param; char output[50]; snprintf(output, 50, "%f", data); param.message.topic.qos = qos; param.message.topic.topic.utf8 = CONFIG_MQTT_PUB_TOPIC; param.message.topic.topic.size = strlen(CONFIG_MQTT_PUB_TOPIC); param.message.payload.data = output; param.message.payload.len = 50; param.message_id = sys_rand32_get(); param.dup_flag = 0; param.retain_flag = 0; data_print("Publishing: ", output, 50); printk("to topic: %s len: %u\n", CONFIG_MQTT_PUB_TOPIC, (unsigned int)strlen(CONFIG_MQTT_PUB_TOPIC)); return mqtt_publish(c, ¶m); } /**@brief MQTT client event handler */ void mqtt_evt_handler(struct mqtt_client * const c, const struct mqtt_evt *evt) { int err; switch (evt->type) { case MQTT_EVT_CONNACK: if (evt->result != 0) { printk("MQTT connect failed %d\n", evt->result); break; } printk("[%s:%d] MQTT client connected!\n", __func__, __LINE__); printk("MQTT Host: %s", CONFIG_MQTT_BROKER_HOSTNAME); if (err) { printk("Unable to initialize AWS jobs upon " "connection\n"); err = mqtt_disconnect(c); if (err) { printk("Could not disconnect: %d\n", err); } } break; case MQTT_EVT_DISCONNECT: printk("[%s:%d] MQTT client disconnected %d\n", __func__, __LINE__, evt->result); break; case MQTT_EVT_PUBLISH: { const struct mqtt_publish_param *p = &evt->param.publish; printk("[%s:%d] MQTT PUBLISH result=%d len=%d\n", __func__, __LINE__, evt->result, p->message.payload.len); err = publish_get_payload(c, payload_buf, p->message.payload.len); if (err) { printk("mqtt_read_publish_payload: Failed! %d\n", err); printk("Disconnecting MQTT client...\n"); err = mqtt_disconnect(c); if (err) { printk("Could not disconnect: %d\n", err); } } if (p->message.topic.qos == MQTT_QOS_1_AT_LEAST_ONCE) { const struct mqtt_puback_param ack = { .message_id = p->message_id }; /* Send acknowledgment. */ err = mqtt_publish_qos1_ack(c, &ack); if (err) { printk("unable to ack\n"); } } data_print("Received: ", payload_buf, p->message.payload.len); break; } case MQTT_EVT_PUBACK: if (evt->result != 0) { printk("MQTT PUBACK error %d\n", evt->result); break; } printk("[%s:%d] PUBACK packet id: %u\n", __func__, __LINE__, evt->param.puback.message_id); break; case MQTT_EVT_SUBACK: if (evt->result != 0) { printk("MQTT SUBACK error %d\n", evt->result); break; } printk("[%s:%d] SUBACK packet id: %u\n", __func__, __LINE__, evt->param.suback.message_id); break; default: printk("[%s:%d] default: %d\n", __func__, __LINE__, evt->type); break; } } /**@brief Resolves the configured hostname and * initializes the MQTT broker structure */ static void broker_init(const char *hostname) { int err; struct addrinfo *result; struct addrinfo *addr; struct addrinfo hints = { .ai_family = AF_INET, .ai_socktype = SOCK_STREAM }; err = getaddrinfo(hostname, NULL, &hints, &result); if (err) { printk("ERROR: getaddrinfo failed %d\n", err); return; } addr = result; err = -ENOENT; while (addr != NULL) { /* IPv4 Address. */ if (addr->ai_addrlen == sizeof(struct sockaddr_in)) { struct sockaddr_in *broker = ((struct sockaddr_in *)&broker_storage); broker->sin_addr.s_addr = ((struct sockaddr_in *)addr->ai_addr) ->sin_addr.s_addr; broker->sin_family = AF_INET; broker->sin_port = htons(CONFIG_MQTT_BROKER_PORT); printk("IPv4 Address 0x%08x\n", broker->sin_addr.s_addr); break; } else if (addr->ai_addrlen == sizeof(struct sockaddr_in6)) { /* IPv6 Address. */ struct sockaddr_in6 *broker = ((struct sockaddr_in6 *)&broker_storage); memcpy(broker->sin6_addr.s6_addr, ((struct sockaddr_in6 *)addr->ai_addr) ->sin6_addr.s6_addr, sizeof(struct in6_addr)); broker->sin6_family = AF_INET6; broker->sin6_port = htons(CONFIG_MQTT_BROKER_PORT); printk("IPv6 Address"); break; } else { printk("error: ai_addrlen = %u should be %u or %u\n", (unsigned int)addr->ai_addrlen, (unsigned int)sizeof(struct sockaddr_in), (unsigned int)sizeof(struct sockaddr_in6)); } addr = addr->ai_next; break; } /* Free the address. */ freeaddrinfo(result); } static int provision_certificates(void) { { int err; /* Delete certificates */ nrf_sec_tag_t sec_tag = CONFIG_CLOUD_CERT_SEC_TAG; for (nrf_key_mgnt_cred_type_t type = 0; type < 3; type++) { err = nrf_inbuilt_key_delete(sec_tag, type); printk("nrf_inbuilt_key_delete(%u, %d) => result=%d\n", sec_tag, type, err); } /* Provision CA Certificate. */ err = nrf_inbuilt_key_write(CONFIG_CLOUD_CERT_SEC_TAG, NRF_KEY_MGMT_CRED_TYPE_CA_CHAIN, CLOUD_CA_CERTIFICATE, strlen(CLOUD_CA_CERTIFICATE)); printk("nrf_inbuilt_key_write => result=%d\n", err); if (err) { printk("CLOUD_CA_CERTIFICATE err: %d", err); return err; } /* Provision Private Certificate. */ err = nrf_inbuilt_key_write( CONFIG_CLOUD_CERT_SEC_TAG, NRF_KEY_MGMT_CRED_TYPE_PRIVATE_CERT, CLOUD_CLIENT_PRIVATE_KEY, strlen(CLOUD_CLIENT_PRIVATE_KEY)); printk("nrf_inbuilt_key_write => result=%d\n", err); if (err) { printk("NRF_CLOUD_CLIENT_PRIVATE_KEY err: %d", err); return err; } /* Provision Public Certificate. */ err = nrf_inbuilt_key_write( CONFIG_CLOUD_CERT_SEC_TAG, NRF_KEY_MGMT_CRED_TYPE_PUBLIC_CERT, CLOUD_CLIENT_PUBLIC_CERTIFICATE, strlen(CLOUD_CLIENT_PUBLIC_CERTIFICATE)); printk("nrf_inbuilt_key_write => result=%d\n", err); if (err) { printk("CLOUD_CLIENT_PUBLIC_CERTIFICATE err: %d", err); return err; } } return 0; } static int client_id_get(char *id_buf) { #if !defined(CONFIG_CLOUD_CLIENT_ID) enum at_cmd_state at_state; char imei_buf[IMEI_LEN + 5]; int err = at_cmd_write("AT+CGSN", imei_buf, (IMEI_LEN + 5), &at_state); if (err) { printk("Error when trying to do at_cmd_write: %d, at_state: %d", err, at_state); } snprintf(id_buf, CLIENT_ID_LEN + 1, "nrf-%s", imei_buf); #else memcpy(id_buf, CONFIG_CLOUD_CLIENT_ID, CLIENT_ID_LEN + 1); #endif /* !defined(NRF_CLOUD_CLIENT_ID) */ return 0; } /**@brief Initialize the MQTT client structure */ static int client_init(struct mqtt_client *client, char *hostname) { mqtt_client_init(client); broker_init(hostname); int ret = client_id_get(client_id_buf); printk("client_id: %s\n", client_id_buf); if (ret != 0) { return ret; } /* MQTT client configuration */ client->broker = &broker_storage; client->evt_cb = mqtt_evt_handler; client->client_id.utf8 = client_id_buf; client->client_id.size = strlen(client_id_buf); client->password = NULL; client->user_name = NULL; client->protocol_version = MQTT_VERSION_3_1_1; /* MQTT buffers configuration */ client->rx_buf = rx_buffer; client->rx_buf_size = sizeof(rx_buffer); client->tx_buf = tx_buffer; client->tx_buf_size = sizeof(tx_buffer); /* MQTT transport configuration */ client->transport.type = MQTT_TRANSPORT_SECURE; static sec_tag_t sec_tag_list[] = {CONFIG_CLOUD_CERT_SEC_TAG}; struct mqtt_sec_config *tls_config = &(client->transport).tls.config; // tls_config->peer_verify = 2; tls_config->cipher_list = NULL; tls_config->cipher_count = 0; tls_config->sec_tag_count = ARRAY_SIZE(sec_tag_list); tls_config->sec_tag_list = sec_tag_list; // tls_config->hostname = hostname; tls_config->peer_verify = 0; // tls_config->cipher_list = NULL; // tls_config->cipher_count = 0; // tls_config->sec_tag_count = 0; // tls_config->sec_tag_list = NULL; tls_config->hostname = NULL; return 0; } /**@brief Initialize the file descriptor structure used by poll. */ static int fds_init(struct mqtt_client *c) { fds.fd = c->transport.tls.sock; fds.events = POLLIN; return 0; } /**@brief Configures modem to provide LTE link. * * Blocks until link is successfully established. */ static void modem_configure(void) { #if defined(CONFIG_LTE_LINK_CONTROL) if (IS_ENABLED(CONFIG_LTE_AUTO_INIT_AND_CONNECT)) { /* Do nothing, modem is already turned on * and connected. */ } else { int err; printk("LTE Link Connecting ...\n"); err = lte_lc_init_and_connect(); __ASSERT(err == 0, "LTE link could not be established."); printk("LTE Link Connected!\n"); } #endif } // //static void aws_fota_cb_handler(enum aws_fota_evt_id evt) //{ // switch (evt) { // case AWS_FOTA_EVT_DONE: // printk("AWS_FOTA_EVT_DONE, rebooting to apply update.\n"); // do_reboot = true; // break; // // case AWS_FOTA_EVT_ERROR: // printk("AWS_FOTA_EVT_ERROR\n"); // break; // } //} void my_timer_handler(struct k_timer *dummy) { int err = data_publish(&client, MQTT_QOS_1_AT_LEAST_ONCE, 2.0); if(err != 0) { printk("ERROR: data_publish %d\n", err); } } K_TIMER_DEFINE(my_timer, my_timer_handler, NULL); //struct k_timer my_timer; void rerun_timer() { k_timer_start(&my_timer, K_SECONDS(10), K_SECONDS(10)); } void main(void) { int err; /* The mqtt client struct */ printk("The MQTT AWS Jobs FOTA Sample\n"); provision_certificates(); modem_configure(); client_init(&client, CONFIG_MQTT_BROKER_HOSTNAME); // err = aws_fota_init(&client, CONFIG_APP_VERSION, aws_fota_cb_handler); // if (err != 0) { // printk("ERROR: aws_fota_init %d\n", err); // return; // } err = mqtt_connect(&client); if (err != 0) { printk("ERROR: mqtt_connect %d\n", err); return; } err = fds_init(&client); if (err != 0) { printk("ERROR: fds_init %d\n", err); return; } /* All initializations were successful mark image as working so that we * will not revert upon reboot. */ // boot_write_img_confirmed(); err = data_publish(&client, MQTT_QOS_1_AT_LEAST_ONCE, 2.0); if(err != 0) { printk("ERROR: data_publish %d\n", err); } k_timer_start(&my_timer, K_SECONDS(10), K_SECONDS(10)); while (1) { err = poll(&fds, 1, K_SECONDS(CONFIG_MQTT_KEEPALIVE)); if (err < 0) { printk("ERROR: poll %d\n", errno); break; } err = mqtt_live(&client); if (err != 0) { printk("ERROR: mqtt_live %d\n", err); break; } if ((fds.revents & POLLIN) == POLLIN) { err = mqtt_input(&client); if (err != 0) { printk("ERROR: mqtt_input %d\n", err); break; } } if ((fds.revents & POLLERR) == POLLERR) { printk("POLLERR\n"); break; } if ((fds.revents & POLLNVAL) == POLLNVAL) { printk("POLLNVAL\n"); break; } if (do_reboot) { /* Teardown */ mqtt_disconnect(&client); sys_reboot(0); } } printk("Disconnecting MQTT client...\n"); err = mqtt_disconnect(&client); if (err) { printk("Could not disconnect MQTT client. Error: %d\n", err); } }