samples: net: websocket: App for doing Websocket client requests

This is BSD sockets based application for connecting to
Websocket server.

Signed-off-by: Jukka Rissanen <[email protected]>

Author: jukkar

samples/net/sockets/websocket_client/CMakeLists.txt

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+# 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(http_client)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})
+
+set(gen_dir ${ZEPHYR_BINARY_DIR}/include/generated/)
+
+generate_inc_file_for_target(
+    app
+    src/echo-apps-cert.der
+    ${gen_dir}/echo-apps-cert.der.inc
+    )

samples/net/sockets/websocket_client/prj.conf

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+# Networking config
+CONFIG_NETWORKING=y
+CONFIG_NET_IPV4=y
+CONFIG_NET_IPV6=y
+CONFIG_NET_TCP=y
+CONFIG_NET_SHELL=y
+CONFIG_NET_STATISTICS=y
+
+# Sockets
+CONFIG_NET_SOCKETS=y
+CONFIG_NET_SOCKETS_POSIX_NAMES=y
+CONFIG_NET_SOCKETS_POLL_MAX=4
+
+# Network driver config
+CONFIG_TEST_RANDOM_GENERATOR=y
+
+# Network address config
+CONFIG_NET_CONFIG_SETTINGS=y
+CONFIG_NET_CONFIG_NEED_IPV4=y
+CONFIG_NET_CONFIG_NEED_IPV6=y
+CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.0.2.1"
+CONFIG_NET_CONFIG_MY_IPV4_GW="192.0.2.2"
+# Address of HTTP IPv4 server
+CONFIG_NET_CONFIG_PEER_IPV4_ADDR="192.0.2.2"
+CONFIG_NET_CONFIG_MY_IPV6_ADDR="2001:db8::1"
+# Address of HTTP IPv6 server
+CONFIG_NET_CONFIG_PEER_IPV6_ADDR="2001:db8::2"
+
+# HTTP & Websocket
+CONFIG_HTTP_CLIENT=y
+CONFIG_WEBSOCKET_CLIENT=y
+
+# Network debug config
+CONFIG_LOG=y
+CONFIG_LOG_IMMEDIATE=y
+CONFIG_NET_LOG=y
+#CONFIG_NET_SOCKETS_LOG_LEVEL_DBG=y
+#CONFIG_NET_HTTP_LOG_LEVEL_DBG=y
+#CONFIG_NET_WEBSOCKET_LOG_LEVEL_DBG=y
+#CONFIG_NET_CONTEXT_LOG_LEVEL_DBG=y
+#CONFIG_NET_TCP_LOG_LEVEL_DBG=y
+
+CONFIG_MAIN_STACK_SIZE=2048
+CONFIG_HEAP_MEM_POOL_SIZE=1500

samples/net/sockets/websocket_client/sample.yaml

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+common:
+  tags: net http http_client websocket_client
+sample:
+  description: Websocket client sample
+  name: websocket_client
+tests:
+  sample.net.sockets.websocket_client:
+    harness: net

samples/net/sockets/websocket_client/src/ca_certificate.h

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+/*
+ * Copyright (c) 2019 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define CA_CERTIFICATE_TAG 1
+
+#define TLS_PEER_HOSTNAME "localhost"
+
+/* This is the same cert as what is found in net-tools/echo-apps-cert.pem file
+ */
+static const unsigned char ca_certificate[] = {
+#include "echo-apps-cert.der.inc"
+};