samples: adding sample to communicate with aws iot

samples/net/cloud/aws_mqtt/CMakeLists.txt

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.13.1)
+
+include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+project(mqtt-azure)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

samples/net/cloud/aws_mqtt/prj.conf

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+CONFIG_NETWORKING=y
+
+# Disable IPv6 support
+CONFIG_NET_IPV6=n
+
+# Enable IPv4 support
+CONFIG_NET_IPV4=y
+CONFIG_NET_IF_MAX_IPV4_COUNT=2
+CONFIG_NET_IF_UNICAST_IPV4_ADDR_COUNT=3
+
+# Enable TCP support
+CONFIG_NET_TCP=y
+
+# Enable Sockets support
+CONFIG_NET_SOCKETS=y
+CONFIG_NET_SOCKETS_SOCKOPT_TLS=y
+
+# Enable DHCPv4 support
+CONFIG_NET_DHCPV4=y
+
+# Enable SOCKS5 proxy support
+CONFIG_SOCKS=n
+
+# Enable MQTT Lib support
+CONFIG_MQTT_LIB=y
+CONFIG_MQTT_LIB_TLS=y
+
+# Network configuration
+CONFIG_NET_CONFIG_SETTINGS=y
+
+# Network connection manager
+CONFIG_NET_CONNECTION_MANAGER=y
+
+CONFIG_NET_MGMT_EVENT_STACK_SIZE=1024
+CONFIG_NET_MGMT_EVENT_QUEUE_SIZE=5
+CONFIG_NET_MGMT_EVENT_LOG_LEVEL_DBG=n
+
+CONFIG_DNS_RESOLVER=y
+CONFIG_DNS_SERVER_IP_ADDRESSES=y
+CONFIG_DNS_SERVER1="8.8.8.8"
+CONFIG_DNS_RESOLVER_ADDITIONAL_BUF_CTR=2
+CONFIG_NEWLIB_LIBC=y
+
+CONFIG_INIT_STACKS=y
+CONFIG_NET_SHELL=y
+
+CONFIG_MAIN_STACK_SIZE=4096
+
+# Enable Logging support
+CONFIG_LOG_IMMEDIATE=y
+CONFIG_NET_LOG=y
+CONFIG_MQTT_LOG_LEVEL_DBG=y
+CONFIG_SOCKS_LOG_LEVEL_DBG=n
+CONFIG_NET_CONNECTION_MANAGER_LOG_LEVEL_DBG=n
+CONFIG_DNS_RESOLVER_LOG_LEVEL_DBG=n
+CONFIG_NET_CONTEXT_LOG_LEVEL_DBG=n
+CONFIG_SOC_PART_NUMBER_SAME70Q21B=y
+CONFIG_SNTP=y
+CONFIG_NET_SOCKETS_POSIX_NAMES=y
+CONFIG_MAIN_STACK_SIZE=4096
+CONFIG_MQTT_LIB_TLS=y
+
+# Enable Mbed TLS configuration
+CONFIG_MBEDTLS=y
+CONFIG_MBEDTLS_BUILTIN=y
+CONFIG_MBEDTLS_ENABLE_HEAP=y
+CONFIG_MBEDTLS_HEAP_SIZE=100000
+CONFIG_MBEDTLS_SSL_MAX_CONTENT_LEN=10240
+CONFIG_MBEDTLS_PEM_CERTIFICATE_FORMAT=y
+CONFIG_MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED=y

samples/net/cloud/aws_mqtt/sample.yaml

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+sample:
+  description: MQTT sample app to AWS IoT cloud
+  name: aws-mqtt
+tests:
+  sample.net.cloud.aws_mqtt:
+    harness: net
+    platform_whitelist: sam_e70_xplained
+    tags: net mqtt cloud

samples/net/cloud/aws_mqtt/src/certificates.h

@@ -0,0 +1,16 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * openssl x509 -in <filename>.pem -inform pem -noout -C
+ */
+
+#error "Fill this before generating the build"
+
+unsigned char amazon_certificate[] = {
+};
+
+
+unsigned char private_key[] = {
+};
+
+unsigned char server_cert[862] = {
+};

samples/net/cloud/aws_mqtt/src/config.h

@@ -0,0 +1,16 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef __CONFIG_H__
+#define __CONFIG_H__
+
+#define ALIVE_TIME      (MSEC_PER_SEC * 60U)
+#define APP_MQTT_BUFFER_SIZE    128
+#error "Fill the Host Name and compile"
+#define CONFIG_AWS_HOSTNAME ""
+#define CONFIG_AWS_PORT         8883
+#define MQTT_CLIENTID           "zephyr_publisher"
+
+#endif /* __CONFIG_H__ */
+

samples/net/cloud/aws_mqtt/src/dhcp.c

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+/* DHCPv4 client startup. */
+
+/*
+ * Copyright (c) 2018 Linaro Ltd
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <logging/log.h>
+
+LOG_MODULE_DECLARE(aws_mqtt, LOG_LEVEL_DBG);
+
+#include <zephyr.h>
+
+#include <net/net_if.h>
+#include <net/net_core.h>
+#include <net/net_context.h>
+#include <net/net_mgmt.h>
+
+static struct net_mgmt_event_callback mgmt_cb;
+
+/* Semaphore to indicate a lease has been acquired. */
+static K_SEM_DEFINE(got_address, 0, 1);
+
+static void handler(struct net_mgmt_event_callback *cb,
+		    u32_t mgmt_event,
+		    struct net_if *iface)
+{
+	int i;
+	bool notified = false;
+
+	if (mgmt_event != NET_EVENT_IPV4_ADDR_ADD) {
+		return;
+	}
+
+	for (i = 0; i < NET_IF_MAX_IPV4_ADDR; i++) {
+
+		if (iface->config.ip.ipv4->unicast[i].addr_type !=
+		    NET_ADDR_DHCP) {
+			continue;
+		}
+
+		if (!notified) {
+			k_sem_give(&got_address);
+			notified = true;
+		}
+		break;
+	}
+}
+
+/**
+ * Start a DHCP client, and wait for a lease to be acquired.
+ */
+void app_dhcpv4_startup(void)
+{
+	LOG_INF("starting DHCPv4");
+
+	net_mgmt_init_event_callback(&mgmt_cb, handler,
+				     NET_EVENT_IPV4_ADDR_ADD);
+	net_mgmt_add_event_callback(&mgmt_cb);
+
+	net_dhcpv4_start(net_if_get_default());
+
+	/* Wait for a lease. */
+	k_sem_take(&got_address, K_FOREVER);
+}

samples/net/cloud/aws_mqtt/src/dhcp.h

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+/* DHCPv4 client startup. */
+
+/*
+ * Copyright (c) 2018 Linaro Ltd
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef __DHCP_H__
+#define __DHCP_H__
+
+void app_dhcpv4_startup(void);
+
+#endif /* not __DHCP_H__ */