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-rw-r--r--fw/app/.gitignore1
-rw-r--r--fw/app/CMakeLists.txt41
-rw-r--r--fw/app/boards/nucleo_f767zi.conf5
-rw-r--r--fw/app/prj.conf45
-rw-r--r--fw/app/sections-rom.ld3
-rw-r--r--fw/app/src/heart.c52
-rw-r--r--fw/app/src/heart.h20
-rw-r--r--fw/app/src/http.c112
-rw-r--r--fw/app/src/index.html21
-rw-r--r--fw/app/src/iot-contact.js48
-rw-r--r--fw/app/src/network.c75
-rw-r--r--fw/app/src/syslog.c75
-rw-r--r--fw/app/src/ws.c251
-rw-r--r--fw/app/src/ws.h17
14 files changed, 766 insertions, 0 deletions
diff --git a/fw/app/.gitignore b/fw/app/.gitignore
new file mode 100644
index 0000000..b6b51e9
--- /dev/null
+++ b/fw/app/.gitignore
@@ -0,0 +1 @@
+my.conf
diff --git a/fw/app/CMakeLists.txt b/fw/app/CMakeLists.txt
new file mode 100644
index 0000000..ce10104
--- /dev/null
+++ b/fw/app/CMakeLists.txt
@@ -0,0 +1,41 @@
+# This Source Code Form is subject to the terms of the Mozilla Public License,
+# v. 2.0. If a copy of the MPL was not distributed with this file, You can
+# obtain one at https://mozilla.org/MPL/2.0/.
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr
+ REQUIRED
+ HINTS
+ "${ZEPHYR_BASE}"
+)
+
+project(iot-contact-fw)
+
+target_sources(app
+ PRIVATE
+ "${CMAKE_CURRENT_SOURCE_DIR}/src/syslog.c"
+ "${CMAKE_CURRENT_SOURCE_DIR}/src/network.c"
+ "${CMAKE_CURRENT_SOURCE_DIR}/src/http.c"
+ "${CMAKE_CURRENT_SOURCE_DIR}/src/ws.c"
+ "${CMAKE_CURRENT_SOURCE_DIR}/src/heart.c"
+)
+
+zephyr_linker_sources(SECTIONS sections-rom.ld)
+zephyr_linker_section(NAME http_resource_desc_http_service
+ KVMA RAM_REGION GROUP RODATA_REGION
+ SUBALIGN ${CONFIG_LINKER_ITERABLE_SUBALIGN})
+
+generate_inc_file_for_target(
+ app
+ src/index.html
+ ${ZEPHYR_BINARY_DIR}/include/generated/index.html.gz.inc
+ --gzip
+)
+
+generate_inc_file_for_target(
+ app
+ src/iot-contact.js
+ ${ZEPHYR_BINARY_DIR}/include/generated/iot-contact.js.gz.inc
+ --gzip
+)
diff --git a/fw/app/boards/nucleo_f767zi.conf b/fw/app/boards/nucleo_f767zi.conf
new file mode 100644
index 0000000..32e6d4a
--- /dev/null
+++ b/fw/app/boards/nucleo_f767zi.conf
@@ -0,0 +1,5 @@
+# This Source Code Form is subject to the terms of the Mozilla Public License,
+# v. 2.0. If a copy of the MPL was not distributed with this file, You can
+# obtain one at https://mozilla.org/MPL/2.0/.
+
+CONFIG_BOOTLOADER_MCUBOOT=y
diff --git a/fw/app/prj.conf b/fw/app/prj.conf
new file mode 100644
index 0000000..11dc04f
--- /dev/null
+++ b/fw/app/prj.conf
@@ -0,0 +1,45 @@
+# This Source Code Form is subject to the terms of the Mozilla Public License,
+# v. 2.0. If a copy of the MPL was not distributed with this file, You can
+# obtain one at https://mozilla.org/MPL/2.0/.
+
+CONFIG_SHELL=y
+CONFIG_SHELL_PROMPT_UART="[iot-contact] "
+
+CONFIG_NETWORKING=y
+CONFIG_NET_SHELL=y
+CONFIG_NET_SOCKETS=y
+CONFIG_NET_CONNECTION_MANAGER=y
+CONFIG_NET_L2_ETHERNET_MGMT=y
+CONFIG_NET_TCP=y
+
+CONFIG_NET_HOSTNAME_ENABLE=y
+CONFIG_NET_HOSTNAME_DYNAMIC=y
+
+CONFIG_NET_CONFIG_SETTINGS=y
+CONFIG_NET_CONFIG_MY_IPV6_ADDR="fdb3:c9f2:efda:1::1"
+CONFIG_NET_IF_UNICAST_IPV6_ADDR_COUNT=4
+
+CONFIG_LOG=y
+CONFIG_LOG_BACKEND_NET=y
+CONFIG_LOG_BACKEND_NET_SERVER="[2001:db8::2]:514"
+CONFIG_LOG_BACKEND_NET_AUTOSTART=n
+CONFIG_LOG_MODE_DEFERRED=y
+
+CONFIG_POSIX_C_LANG_SUPPORT_R=y
+
+CONFIG_HTTP_PARSER=y
+CONFIG_HTTP_PARSER_URL=y
+
+CONFIG_HTTP_SERVER=y
+CONFIG_HTTP_SERVER_WEBSOCKET=y
+
+CONFIG_FILE_SYSTEM=y
+
+CONFIG_EVENTFD=y
+
+CONFIG_ZVFS_OPEN_MAX=32
+CONFIG_ZVFS_POLL_MAX=32
+
+CONFIG_ZBUS=y
+CONFIG_ZBUS_MSG_SUBSCRIBER=y
+CONFIG_HEAP_MEM_POOL_SIZE=2048
diff --git a/fw/app/sections-rom.ld b/fw/app/sections-rom.ld
new file mode 100644
index 0000000..c2f7bc4
--- /dev/null
+++ b/fw/app/sections-rom.ld
@@ -0,0 +1,3 @@
+#include <zephyr/linker/iterable_sections.h>
+
+ITERABLE_SECTION_ROM(http_resource_desc_http_service, Z_LINK_ITERABLE_SUBALIGN)
diff --git a/fw/app/src/heart.c b/fw/app/src/heart.c
new file mode 100644
index 0000000..6bcced6
--- /dev/null
+++ b/fw/app/src/heart.c
@@ -0,0 +1,52 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public License,
+ * v. 2.0. If a copy of the MPL was not distributed with this file, You can
+ * obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+
+#include <stdbool.h>
+
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+
+#include "heart.h"
+
+
+LOG_MODULE_REGISTER(heart);
+
+
+#define HEART_PERIOD K_MSEC(1000)
+#define HEART_STACK_SIZE 500
+#define HEART_PRIO K_PRIO_PREEMPT(8)
+
+
+ZBUS_CHAN_DEFINE(
+ heartbeat_channel,
+ struct heartbeat,
+ NULL,
+ NULL,
+ ZBUS_OBSERVERS_EMPTY,
+ ZBUS_MSG_INIT(.ttl_ms = 0)
+);
+
+
+static void heart_thread_function(void *ptr1, void *ptr2, void *ptr3) {
+ LOG_INF("Starting to beat");
+
+ struct heartbeat heartbeat = {.ttl_ms = 1100};
+
+ while (true) {
+ LOG_DBG("Heart beat");
+ int ret = zbus_chan_pub(&heartbeat_channel, &heartbeat, K_FOREVER);
+ if (ret < 0) {
+ LOG_ERR("Could not publish heartbeat");
+ }
+ k_sleep(HEART_PERIOD);
+ }
+}
+
+
+K_THREAD_DEFINE(heart_thread, HEART_STACK_SIZE,
+ heart_thread_function, NULL, NULL, NULL,
+ HEART_PRIO, 0, 0);
diff --git a/fw/app/src/heart.h b/fw/app/src/heart.h
new file mode 100644
index 0000000..cd32c15
--- /dev/null
+++ b/fw/app/src/heart.h
@@ -0,0 +1,20 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public License,
+ * v. 2.0. If a copy of the MPL was not distributed with this file, You can
+ * obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef SRC_HEART_H
+#define SRC_HEART_H
+
+
+#include <zephyr/zbus/zbus.h>
+
+
+struct heartbeat {
+ uint32_t ttl_ms;
+};
+
+ZBUS_CHAN_DECLARE(heartbeat_channel);
+
+#endif // !SRC_HEART_H
diff --git a/fw/app/src/http.c b/fw/app/src/http.c
new file mode 100644
index 0000000..e206f86
--- /dev/null
+++ b/fw/app/src/http.c
@@ -0,0 +1,112 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public License,
+ * v. 2.0. If a copy of the MPL was not distributed with this file, You can
+ * obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+
+#include <stdint.h>
+
+#include <zephyr/init.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/net/http/server.h>
+#include <zephyr/net/http/service.h>
+#include <zephyr/net/http/status.h>
+
+#include "ws.h"
+
+
+LOG_MODULE_REGISTER(http);
+
+
+static const uint8_t index_html_gz[] = {
+ #include "index.html.gz.inc"
+};
+
+struct http_resource_detail_static index_resource_detail = {
+ .common = {
+ .type = HTTP_RESOURCE_TYPE_STATIC,
+ .bitmask_of_supported_http_methods = BIT(HTTP_GET),
+ .content_encoding = "gzip",
+ .content_type = "text/html",
+ },
+ .static_data = index_html_gz,
+ .static_data_len = sizeof(index_html_gz),
+};
+
+static const uint8_t js_html_gz[] = {
+ #include "iot-contact.js.gz.inc"
+};
+
+struct http_resource_detail_static js_resource_detail = {
+ .common = {
+ .type = HTTP_RESOURCE_TYPE_STATIC,
+ .bitmask_of_supported_http_methods = BIT(HTTP_GET),
+ .content_encoding = "gzip",
+ .content_type = "text/javascript",
+ },
+ .static_data = js_html_gz,
+ .static_data_len = sizeof(js_html_gz),
+};
+
+static int favicon_handler(
+ struct http_client_ctx *client,
+ enum http_data_status status,
+ const struct http_request_ctx *request_ctx,
+ struct http_response_ctx *response_ctx,
+ void *user_data
+) {
+ LOG_DBG("Handling favicon request");
+
+ response_ctx->body = NULL;
+ response_ctx->body_len = 0;
+ response_ctx->final_chunk = true;
+ response_ctx->status = HTTP_204_NO_CONTENT;
+
+ LOG_DBG("Favicon request handled");
+ return 0;
+}
+
+static struct http_resource_detail_dynamic favicon_resource_detail = {
+ .common = {
+ .type = HTTP_RESOURCE_TYPE_DYNAMIC,
+ .bitmask_of_supported_http_methods = BIT(HTTP_GET),
+ },
+ .cb = favicon_handler,
+ .user_data = NULL,
+};
+
+static uint8_t websocket_read_buffer[1024];
+
+struct http_resource_detail_websocket websocket_resource_detail = {
+ .common = {
+ .type = HTTP_RESOURCE_TYPE_WEBSOCKET,
+ .bitmask_of_supported_http_methods = BIT(HTTP_GET),
+ },
+ .cb = ws_upgrade_handler,
+ .data_buffer = websocket_read_buffer,
+ .data_buffer_len = sizeof(websocket_read_buffer),
+};
+
+static uint16_t http_port = 80;
+
+HTTP_SERVICE_DEFINE(http_service, NULL, &http_port, 1, 10, NULL, NULL);
+
+HTTP_RESOURCE_DEFINE(index_resource, http_service, "/", &index_resource_detail);
+HTTP_RESOURCE_DEFINE(websocket_resource, http_service, "/", &websocket_resource_detail);
+HTTP_RESOURCE_DEFINE(favicon_resource, http_service, "/favicon.ico", &favicon_resource_detail);
+HTTP_RESOURCE_DEFINE(js_resource, http_service, "/iot-contact.js", &js_resource_detail);
+
+int init_http_server(void) {
+ LOG_DBG("Starting HTTP server");
+
+ int ret = http_server_start();
+ if (ret < 0) {
+ LOG_ERR("Failed to start HTTP server (%d)", ret);
+ return ret;
+ }
+
+ LOG_INF("HTTP server was started");
+ return 0;
+}
+SYS_INIT(init_http_server, APPLICATION, 99);
diff --git a/fw/app/src/index.html b/fw/app/src/index.html
new file mode 100644
index 0000000..5817818
--- /dev/null
+++ b/fw/app/src/index.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+ - License, v. 2.0. If a copy of the MPL was not distributed with this
+ - file, You can obtain one at https://mozilla.org/MPL/2.0/. -->
+
+<html lang="en">
+ <head>
+ <meta charset="UTF-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>iot-contact</title>
+ <script type="text/javascript" src="/iot-contact.js"></script>
+ </head>
+ <body>
+ <h4>iot-contact</h4>
+ <p>
+ <label for="heartbeat">Heartbeat</label>
+ <meter id="heartbeat" min="0" max="1" value="0"></meter>
+ </p>
+ </body>
+</html>
diff --git a/fw/app/src/iot-contact.js b/fw/app/src/iot-contact.js
new file mode 100644
index 0000000..e8e966f
--- /dev/null
+++ b/fw/app/src/iot-contact.js
@@ -0,0 +1,48 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public License,
+ * v. 2.0. If a copy of the MPL was not distributed with this file, You can
+ * obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+function blinkHeartbeat() {
+ const heartbeat = document.getElementById("heartbeat");
+ heartbeat.value = 1;
+ setTimeout(() => heartbeat.value = 0, 300);
+}
+
+window.addEventListener("DOMContentLoaded", (ev) => {
+ const ws = new WebSocket("/");
+ console.log("WebSocket object created");
+
+ ws.onopen = (event) => {
+ console.log("WebSocket connection opened");
+ };
+
+ ws.onmessage = (event) => {
+ try {
+ const data = JSON.parse(event.data);
+ console.log("Message received: ", data);
+ if (data.type === 0 && data.ttl_ms) {
+ blinkHeartbeat();
+ }
+ } catch (error) {
+ console.error("Invalid message received:", event.data);
+ }
+ };
+
+ ws.onclose = (event) => {
+ console.log("WebSocket connection closed");
+ };
+
+ ws.onerror = (event) => {
+ console.log("WebSocket error: ", event);
+ };
+
+ setInterval(() => {
+ if (ws.readyState === WebSocket.OPEN) {
+ const data = "{\"type\":0,\"ttl_ms\":1100}\n";
+ ws.send(data);
+ console.log("Heartbeat sent: '", data, "'");
+ }
+ }, 1000);
+})
diff --git a/fw/app/src/network.c b/fw/app/src/network.c
new file mode 100644
index 0000000..6e6eb17
--- /dev/null
+++ b/fw/app/src/network.c
@@ -0,0 +1,75 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public License,
+ * v. 2.0. If a copy of the MPL was not distributed with this file, You can
+ * obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+
+#include <stdint.h>
+#include <string.h>
+
+#include <zephyr/init.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/net/hostname.h>
+#include <zephyr/net/net_if.h>
+#include <zephyr/net/net_linkaddr.h>
+#include <zephyr/net/net_mgmt.h>
+#include <zephyr/net/ethernet.h>
+#include <zephyr/net/ethernet_mgmt.h>
+#include <zephyr/sys/util.h>
+
+
+LOG_MODULE_REGISTER(network);
+
+
+#define HOSTNAME "iot-contact"
+
+
+/* will be read from an EEPROM chip in the future */
+static const uint8_t mac_address[NET_ETH_ADDR_LEN] = {0x00, 0x00, 0x5e, 0x00, 0x53, 0x01};
+
+int init_mac_address(void)
+{
+ LOG_DBG("Setting custom MAC address");
+
+ struct net_if *interface = net_if_get_default();
+
+ int ret = net_if_down(interface);
+ if (ret < 0) {
+ LOG_ERR("Failed to set interface down to set MAC address (%d)", ret);
+ return ret;
+ }
+
+ struct ethernet_req_params params = {0};
+ memcpy(params.mac_address.addr, mac_address, 6);
+ ret = net_mgmt(NET_REQUEST_ETHERNET_SET_MAC_ADDRESS, interface, &params, sizeof(params));
+ if (ret < 0) {
+ LOG_ERR("Failed to set MAC address (%d)", ret);
+ return ret;
+ }
+
+ ret = net_if_up(interface);
+ if (ret < 0) {
+ LOG_ERR("Failed to set interface up after setting MAC address (%d)", ret);
+ return ret;
+ }
+
+ LOG_INF("Successfully set MAC address");
+ return 0;
+}
+SYS_INIT(init_mac_address, APPLICATION, 0);
+
+int init_hostname(void)
+{
+ LOG_DBG("Setting hostname");
+
+ int ret = net_hostname_set(HOSTNAME, sizeof(HOSTNAME));
+ if (ret < 0) {
+ LOG_ERR("Failed to set hostname to '%s' (%d)", HOSTNAME, ret);
+ return ret;
+ }
+
+ LOG_INF("Successfully set hostname to '%s'", HOSTNAME);
+ return 0;
+}
+SYS_INIT(init_hostname, APPLICATION, 1);
diff --git a/fw/app/src/syslog.c b/fw/app/src/syslog.c
new file mode 100644
index 0000000..b1a1077
--- /dev/null
+++ b/fw/app/src/syslog.c
@@ -0,0 +1,75 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public License,
+ * v. 2.0. If a copy of the MPL was not distributed with this file, You can
+ * obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include <stdbool.h>
+
+#include <zephyr/init.h>
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/logging/log_backend.h>
+#include <zephyr/logging/log_backend_net.h>
+#include <zephyr/logging/log_ctrl.h>
+#include <zephyr/logging/log_core.h>
+#include <zephyr/net/conn_mgr_connectivity.h>
+
+LOG_MODULE_REGISTER(syslog);
+
+#define L4_EVENT_MASK (NET_EVENT_L4_CONNECTED | NET_EVENT_L4_DISCONNECTED)
+
+struct net_mgmt_event_callback l4_cb;
+static K_SEM_DEFINE(network_connected, 0, 1);
+
+void l4_event_handler(
+ struct net_mgmt_event_callback *cb,
+ uint32_t event,
+ struct net_if *iface)
+{
+ LOG_DBG("Executing L4 event handler");
+
+ switch (event) {
+ case NET_EVENT_L4_CONNECTED:
+ k_sem_give(&network_connected);
+ LOG_INF("Network connected");
+ break;
+ case NET_EVENT_L4_DISCONNECTED:
+ LOG_INF("Network disconnected");
+ break;
+ default:
+ break;
+ }
+}
+
+int init_network_monitoring(void)
+{
+ net_mgmt_init_event_callback(&l4_cb, l4_event_handler, L4_EVENT_MASK);
+ net_mgmt_add_event_callback(&l4_cb);
+
+ return 0;
+}
+SYS_INIT(init_network_monitoring, APPLICATION, 0);
+
+int init_syslog(void)
+{
+ LOG_DBG("Initializing syslog logging backend");
+
+ LOG_DBG("Waiting for network ...");
+ k_sem_take(&network_connected, K_FOREVER);
+
+ LOG_DBG("Enabling syslog backend");
+ const struct log_backend *backend = log_backend_net_get();
+ if (log_backend_is_active(backend) == false) {
+ /* flush log messages to ensure first syslog message is reproducible */
+ while (log_process());
+ log_backend_init(backend);
+ log_backend_enable(backend, backend->cb->ctx, CONFIG_LOG_MAX_LEVEL);
+ LOG_INF("Syslog backend enabled");
+ } else {
+ LOG_INF("Syslog backend was already enabled");
+ }
+
+ return 0;
+}
+SYS_INIT(init_syslog, APPLICATION, 50);
diff --git a/fw/app/src/ws.c b/fw/app/src/ws.c
new file mode 100644
index 0000000..6f68538
--- /dev/null
+++ b/fw/app/src/ws.c
@@ -0,0 +1,251 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public License,
+ * v. 2.0. If a copy of the MPL was not distributed with this file, You can
+ * obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/net/http/server.h>
+#include <zephyr/net/websocket.h>
+#include <zephyr/sys_clock.h>
+#include <zephyr/zbus/zbus.h>
+
+#include "heart.h"
+
+
+LOG_MODULE_REGISTER(ws);
+
+
+#define WS_NUM_HANDLERS 1
+#define WS_HANDLER_STACK_SIZE 2048
+#define WS_HANDLER_PRIO K_PRIO_PREEMPT(8)
+#define WS_CONNECTION_BACKLOG_LEN 5
+#define WS_TX_BUFFER_LEN 150
+#define WS_CLIENT_HEARTBEAT_GRACE_TIME_MS 10000
+
+K_MSGQ_DEFINE(ws_connection_backlog, sizeof(int), WS_CONNECTION_BACKLOG_LEN, 1);
+ZBUS_MSG_SUBSCRIBER_DEFINE(ws_tx_messages);
+ZBUS_CHAN_ADD_OBS(heartbeat_channel, ws_tx_messages, 3);
+
+static void ws_tx_thread_function(void *ptr1, void *ptr2, void *ptr3) {
+ int fd = -1;
+ struct k_msgq *tx_fds = ptr1;
+ uint8_t buffer[WS_TX_BUFFER_LEN];
+ const struct zbus_channel *chan;
+ struct heartbeat heartbeat;
+
+ while (true) {
+ int ret = zbus_obs_set_enable(&ws_tx_messages, false);
+ if (ret < 0) {
+ LOG_ERR("Could not disable zbus observer (%d)", ret);
+ continue;
+ }
+
+ ret = k_msgq_get(tx_fds, &fd, K_FOREVER);
+ if (ret < 0) {
+ LOG_ERR("Error getting new file descriptor (%d)", ret);
+ continue;
+ }
+ LOG_INF("Handling TX of connection with file descriptor %d", fd);
+
+ ret = zbus_obs_set_enable(&ws_tx_messages, true);
+ if (ret < 0) {
+ LOG_ERR("Could not enable zbus observer (%d)", ret);
+ continue;
+ }
+
+ while (true) {
+ ret = zbus_sub_wait_msg(&ws_tx_messages, &chan, &heartbeat, K_FOREVER);
+ if (ret < 0) {
+ LOG_ERR("Could not wait for zbus messages (%d)", ret);
+ break;
+ }
+ if (chan != &heartbeat_channel) {
+ LOG_ERR("Unsupported channel");
+ continue;
+ }
+
+ ret = snprintf((char *)buffer, sizeof(buffer),
+ "{\"type\":0,\"ttl_ms\":%d}\n", heartbeat.ttl_ms);
+ if (ret < 0) {
+ LOG_ERR("Could not serialize heartbeat message");
+ continue;
+ }
+ size_t len = ret;
+
+ int ret = websocket_send_msg(
+ fd, (const uint8_t *)buffer, len,
+ WEBSOCKET_OPCODE_DATA_TEXT, false, true, 100
+ );
+ if (ret < 0) {
+ if (ret == -EBADF) {
+ LOG_DBG("Connection closed, waiting for new one");
+ } else {
+ LOG_ERR("Error on websocket_send_msg (%d)", ret);
+ }
+ break;
+ }
+ }
+ }
+}
+
+static int ws_recv_full_message(int fd, void *buf, const size_t len,
+ uint32_t *message_type, int64_t deadline) {
+ uint64_t remaining = 0;
+ size_t read = 0;
+ int ret;
+
+ while (true) {
+ int64_t timeout = MIN(50, deadline - k_uptime_get());
+ if (timeout <= 0) {
+ ret = -ETIMEDOUT;
+ LOG_ERR("No time left to read message from %d (%d)", fd, ret);
+ return ret;
+ }
+
+ if (read >= len) {
+ ret = -ENOSPC;
+ LOG_ERR("No buffer space left to store message from %d (%d)", fd, ret);
+ return ret;
+ }
+
+ ret = websocket_recv_msg(fd, (unsigned char *)buf+read, len-read,
+ message_type, &remaining, timeout);
+ if (ret < 0) {
+ if (ret == -EAGAIN || ret == -EINTR) {
+ LOG_DBG("Trying again to read full message");
+ continue;
+ } else {
+ LOG_ERR("Unhandled error on message reading (%d)", ret);
+ return ret;
+ }
+ }
+
+ read += ret;
+
+ if (remaining <= 0) {
+ return read;
+ }
+ }
+}
+
+static int ws_handle_data_text(const uint8_t *buf, size_t len, int64_t *deadline) {
+ LOG_DBG("Got text message");
+
+ static const char heartbeat[] = "{\"type\":0,\"ttl_ms\":1100}\n";
+
+ if (len + 1 == sizeof(heartbeat)) {
+ if (memcmp((const void *)buf, heartbeat, len) == 0) {
+ LOG_DBG("Received heartbeat from client");
+ *deadline = k_uptime_get() + WS_CLIENT_HEARTBEAT_GRACE_TIME_MS;
+ return 0;
+ }
+ }
+
+ LOG_HEXDUMP_DBG(buf, len, "Could not handle message");
+ return -EIO;
+}
+
+static int ws_rx_handle_connection(int fd) {
+ LOG_INF("Handling RX of connection with file descriptor %d", fd);
+
+ uint8_t rx_buf[100];
+ uint32_t message_type = 0;
+ int64_t rx_heartbeat_deadline = k_uptime_get() + WS_CLIENT_HEARTBEAT_GRACE_TIME_MS;
+
+ while (true) {
+ memset(rx_buf, 0, sizeof(rx_buf));
+
+ int ret = ws_recv_full_message(fd, rx_buf, sizeof(rx_buf),
+ &message_type, rx_heartbeat_deadline);
+ if (ret < 0) {
+ LOG_ERR("Could not receive full message from %d (%d)", fd, ret);
+ return ret;
+ }
+ size_t len = ret;
+ LOG_DBG("Received message with opcode %d of length %d", message_type, len);
+
+ if (message_type == WEBSOCKET_OPCODE_DATA_TEXT ||
+ message_type == 3) { // FIXME for some reason opcode 1 parses to 3
+ ret = ws_handle_data_text(rx_buf, len, &rx_heartbeat_deadline);
+ if (ret < 0) {
+ LOG_ERR("Failed to handle text data (%d)", ret);
+ }
+ } else if (message_type == WEBSOCKET_OPCODE_CLOSE) {
+ LOG_INF("Client closed connection");
+ return 0;
+ } else {
+ LOG_WRN("Received unhandled message opcode %d", message_type);
+ LOG_HEXDUMP_WRN(rx_buf, len, "Message content:");
+ }
+
+ if (k_uptime_get() > rx_heartbeat_deadline) {
+ LOG_INF("Client heartbeat timeout expired on %d - closing", fd);
+ return -ETIMEDOUT;
+ }
+ }
+}
+
+static void ws_rx_thread_function(void *ptr1, void *ptr2, void *ptr3) {
+ struct k_msgq *tx_fds = ptr1;
+
+ while (true) {
+ int fd;
+ int ret = k_msgq_get(&ws_connection_backlog, &fd, K_FOREVER);
+ if (ret < 0) {
+ LOG_ERR("Error getting new file descriptor (%d)", ret);
+ continue;
+ }
+
+ ret = k_msgq_put(tx_fds, (const void *)&fd, K_FOREVER);
+ if (ret < 0) {
+ LOG_ERR("Could not pass file descriptor %d to TX thread (%d)", fd, ret);
+ goto unregister;
+ }
+
+ ret = ws_rx_handle_connection(fd);
+ if (ret < 0) {
+ LOG_ERR("Failed to handle connection %d (%d)", fd, ret);
+ goto unregister;
+ }
+
+unregister:
+ ret = websocket_unregister(fd);
+ if (ret < 0) {
+ LOG_ERR("Failed to unregister connection %d (%d)", fd, ret);
+ }
+ }
+}
+
+K_MSGQ_DEFINE(ws_tx_fd_1, sizeof(int), 1, 1);
+K_THREAD_DEFINE(ws_rx_thread_1, WS_HANDLER_STACK_SIZE,
+ ws_rx_thread_function, &ws_tx_fd_1, NULL, NULL,
+ WS_HANDLER_PRIO, 0, 0);
+K_THREAD_DEFINE(ws_tx_thread_1, WS_HANDLER_STACK_SIZE,
+ ws_tx_thread_function, &ws_tx_fd_1, NULL, NULL,
+ WS_HANDLER_PRIO, 0, 0);
+
+int ws_upgrade_handler(
+ int ws_socket,
+ struct http_request_ctx *request_ctx,
+ void *user_data
+) {
+ LOG_DBG("Handling WebSocket upgrade for file descriptor %d", ws_socket);
+
+ int ret = k_msgq_put(&ws_connection_backlog, (const void *)&ws_socket,
+ K_NO_WAIT);
+ if (ret < 0) {
+ LOG_ERR("Connection backlog full, dropping file descriptor %d", ws_socket);
+ return -ENOENT;
+ }
+
+ LOG_INF("Added file descriptor %d to connection backlog", ws_socket);
+ return 0;
+}
diff --git a/fw/app/src/ws.h b/fw/app/src/ws.h
new file mode 100644
index 0000000..0c13039
--- /dev/null
+++ b/fw/app/src/ws.h
@@ -0,0 +1,17 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public License,
+ * v. 2.0. If a copy of the MPL was not distributed with this file, You can
+ * obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef SRC_WS_H
+#define SRC_WS_H
+
+
+#include <zephyr/net/http/server.h>
+
+
+int ws_upgrade_handler(int ws_socket, struct http_request_ctx *request_ctx,
+ void *user_data);
+
+#endif // !SRC_WS_H
generated by cgit v1.2.3-70-g09d2 (git 2.51.0) at 2025-11-04 08:05:21 +0000