Fix esp-idf and IPv6 support by using plain UDP socket, drop Syslog library

README.md

@@ -2,8 +2,6 @@
 
 A simple syslog component for esphome. The component is designed to auto attach itself to the logger core module (like the MQTT component does with the `log_topic`)
 
-This component uses the https://github.com/arcao/Syslog library version 2.0 at its core
-
 ## How to
 
 ### Manually

components/syslog/__init__.py

@@ -8,25 +8,22 @@
 CONF_ENABLE_LOGGER_MESSAGES = "enable_logger"
 CONF_MIN_LEVEL = "min_level"
 
-DEPENDENCIES = ['logger','network']
+DEPENDENCIES = ['logger','network','socket']
 
 debug_ns = cg.esphome_ns.namespace('debug')
 syslog_ns = cg.esphome_ns.namespace('syslog')
 
 SyslogComponent = syslog_ns.class_('SyslogComponent', cg.Component)
 SyslogLogAction = syslog_ns.class_('SyslogLogAction', automation.Action)
 
-CONFIG_SCHEMA = cv.All(
-    cv.Schema({
-        cv.GenerateID(): cv.declare_id(SyslogComponent),
-        cv.Optional(CONF_IP_ADDRESS, default="255.255.255.255"): cv.string_strict,
-        cv.Optional(CONF_PORT, default=514): cv.port,
-        cv.Optional(CONF_ENABLE_LOGGER_MESSAGES, default=True): cv.boolean,
-        cv.Optional(CONF_STRIP_COLORS, default=True): cv.boolean,
-        cv.Optional(CONF_MIN_LEVEL, default="DEBUG"): is_log_level,
-    }),
-    cv.only_with_arduino,
-)
+CONFIG_SCHEMA = cv.Schema({
+    cv.GenerateID(): cv.declare_id(SyslogComponent),
+    cv.Optional(CONF_IP_ADDRESS, default="255.255.255.255"): cv.string_strict,
+    cv.Optional(CONF_PORT, default=514): cv.port,
+    cv.Optional(CONF_ENABLE_LOGGER_MESSAGES, default=True): cv.boolean,
+    cv.Optional(CONF_STRIP_COLORS, default=True): cv.boolean,
+    cv.Optional(CONF_MIN_LEVEL, default="DEBUG"): is_log_level,
+})
 
 SYSLOG_LOG_ACTION_SCHEMA = cv.Schema({
     cv.GenerateID(): cv.use_id(SyslogComponent),
@@ -36,8 +33,6 @@
 })
 
 def to_code(config):
-    cg.add_library('Syslog', '2.0.0')
-
     var = cg.new_Pvariable(config[CONF_ID])
     yield cg.register_component(var, config)
 

components/syslog/syslog_component.cpp

@@ -2,16 +2,21 @@
 
 #include "esphome/core/log.h"
 #include "esphome/core/application.h"
+#include "esphome/core/version.h"
 
 #ifdef USE_LOGGER
 #include "esphome/components/logger/logger.h"
 #endif
 /*
 #include "esphome/core/helpers.h"
 #include "esphome/core/defines.h"
-#include "esphome/core/version.h"
 */
 
+#ifdef USE_SOCKET_IMPL_LWIP_TCP
+#include <lwip/ip.h>
+#define IPPROTO_UDP IP_PROTO_UDP
+#endif
+
 namespace esphome {
 namespace syslog {
 
@@ -23,12 +28,53 @@ static const uint8_t esphome_to_syslog_log_levels[] = {0, 3, 4, 6, 5, 7, 7, 7};
 
 SyslogComponent::SyslogComponent() {
     this->settings_.client_id = App.get_name();
-    // Get the WifiUDP client here instead of getting it in setup() to make sure we always have a client when calling log()
-    // Calling log() without the device connected should not be an issue since there is a wifi connected check and WifiUDP fails "silently" and doesn't generate an exception anyways
-    this->udp_ = new WiFiUDP(); 
 }
 
 void SyslogComponent::setup() {
+
+    /*
+     * Older versions of socket::set_sockaddr() return bogus results
+     * if trying to log to a Legacy IP address when IPv6 is enabled.
+     * Fixed by https://github.com/esphome/esphome/pull/7196
+     */
+    this->server_socklen = 0;
+    if (ESPHOME_VERSION_CODE >= VERSION_CODE(2024, 8, 0)) {
+        this->server_socklen = socket::set_sockaddr((struct sockaddr *)&this->server, sizeof(this->server),
+                                                    this->settings_.address, this->settings_.port);
+    }
+#if USE_NETWORK_IPV6
+    else if (this->settings_.address.find(':') != std::string::npos) {
+        auto *server6 = reinterpret_cast<sockaddr_in6 *>(&this->server);
+        memset(server6, 0, sizeof(*server6));
+        server6->sin6_family = AF_INET6;
+        server6->sin6_port = htons(this->settings_.port);
+
+        ip6_addr_t ip6;
+        inet6_aton(this->settings_.address.c_str(), &ip6);
+        memcpy(server6->sin6_addr.un.u32_addr, ip6.addr, sizeof(ip6.addr));
+        this->server_socklen = sizeof(*server6);
+    }
+#endif /* USE_NETWORK_IPV6 */
+    else {
+        auto *server4 = reinterpret_cast<sockaddr_in *>(&this->server);
+        memset(server4, 0, sizeof(*server4));
+        server4->sin_family = AF_INET;
+        server4->sin_addr.s_addr = inet_addr(this->settings_.address.c_str());
+        server4->sin_port = htons(this->settings_.port);
+        this->server_socklen = sizeof(*server4);
+    }
+    if (!this->server_socklen) {
+        ESP_LOGE(TAG, "Failed to parse server IP address '%s'", this->settings_.address.c_str());
+        this->mark_failed();
+        return;
+    }
+    this->socket_ = socket::socket(this->server.ss_family, SOCK_DGRAM, IPPROTO_UDP);
+    if (!this->socket_) {
+        ESP_LOGE(TAG, "Failed to create UDP socket");
+        this->mark_failed();
+        return;
+    }
+
     this->log(ESPHOME_LOG_LEVEL_INFO , "syslog", "Syslog started");
     ESP_LOGI(TAG, "Started");
 
@@ -51,23 +97,22 @@ void SyslogComponent::loop() {
 }
 
 void SyslogComponent::log(uint8_t level, const std::string &tag, const std::string &payload) {
+
+    if (this->is_failed())
+        return;
+
     level = level > 7 ? 7 : level;
 
-    // Simple check to make sure that there is connectivity, if not, log the issue and return
-    if(WiFi.status() != WL_CONNECTED) {
-        ESP_LOGW(TAG, "Tried to send \"%s\"@\"%s\" with level %d but Wifi isn't connected yet", tag.c_str(), payload.c_str(), level);
+    if (!this->socket_) {
+        ESP_LOGW(TAG, "Tried to send \"%s\"@\"%s\" with level %d but socket isn't connected", tag.c_str(), payload.c_str(), level);
         return;
     }
 
-    Syslog syslog(
-        *this->udp_,
-        this->settings_.address.c_str(),
-        this->settings_.port,
-        this->settings_.client_id.c_str(),
-        tag.c_str(),
-        LOG_KERN
-    );
-    if(!syslog.log(esphome_to_syslog_log_levels[level],  payload.c_str())) {
+    int pri = esphome_to_syslog_log_levels[level];
+    std::string buf = str_sprintf("<%d>1 - %s %s - - - \xEF\xBB\xBF%s",
+                                  pri, this->settings_.client_id.c_str(),
+                                  tag.c_str(), payload.c_str());
+    if (this->socket_->sendto(buf.c_str(), buf.length(), 0, (struct sockaddr *)&this->server, this->server_socklen) < 0) {
         ESP_LOGW(TAG, "Tried to send \"%s\"@\"%s\" with level %d but but failed for an unknown reason", tag.c_str(), payload.c_str(), level);
     }
 }

components/syslog/syslog_component.h

@@ -6,16 +6,7 @@
 #include "esphome/core/defines.h"
 #include "esphome/core/automation.h"
 #include "esphome/core/log.h"
-#include <Syslog.h>
-#include <Udp.h>
-
-#if defined ESP8266 || defined ARDUINO_ESP8266_ESP01
-    #include <ESP8266WiFi.h>
-#else
-    #include <WiFi.h>
-#endif
-
-#include <WiFiUdp.h>
+#include "esphome/components/socket/socket.h"
 
 namespace esphome {
 namespace syslog {
@@ -51,7 +42,9 @@ class SyslogComponent : public Component  {
         bool strip_colors;
         bool enable_logger;
         SYSLOGSettings settings_;
-        UDP *udp_ = NULL;
+        std::unique_ptr<socket::Socket> socket_ = nullptr;
+        struct sockaddr_storage server;
+        socklen_t server_socklen;
 };
 
 template<typename... Ts> class SyslogLogAction : public Action<Ts...> {