ethernet.cpp

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// Copyright (c) 2024 anabrid GmbH
// Contact: https://www.anabrid.com/licensing/
//
// SPDX-License-Identifier: MIT OR GPL-2.0-or-later
 
#ifdef ARDUINO
 
#include <ArduinoJson.h>
 
#include "net/ethernet.h"
#include "net/settings.h"
#include "utils/logging.h"
 
#include "protocol/jsonl_server.h"
#include "web/server.h"
 
using namespace utils;
 
FLASHMEM void net::StartupConfig::reset_defaults() {
#ifdef ANABRID_SKIP_ETHERNET
  enable_ethernet = false;
  LOG_ALWAYS("Skipping Ethernet due to build flag ANABRID_ETHERNET");
#else
  enable_ethernet = true;
#endif
 
// This build flag basically solves a "deadlock" if a no DHCP server is
// available but the teensy is configured for dhcp.
#ifdef ANABRID_SKIP_DHCP
  enable_dhcp = false;
  LOG_ALWAYS("Skipping DHCP due to build flag ANABRID_SKIP_DHCP");
#else
  enable_dhcp = true;
#endif
 
  mac.reset();
 
  // Note that the default hostname by QNEthernet is just "teensy-lwip".
  // Instead, here we choose something unique to the device.
  char mac_str[50];
  sprintf(mac_str, "lucidac-%02X-%02X-%02X", mac[3], mac[4], mac[5]);
  hostname = mac_str;
 
  static_ipaddr = IPAddress(192, 168, 1, 100);
  static_netmask = IPAddress(255, 255, 255, 0);
  static_gw = IPAddress(192, 168, 1, 1);
  static_dns = IPAddress(8, 8, 8, 8);
 
  enable_jsonl = true;
  enable_webserver = false;  
  enable_websockets = false; 
  enable_mdns = true;
 
  jsonl_port = 5732;
  webserver_port = 80;
 
  connection_timeout_ms = 72 * 1000 * 1000; 
  max_connections = 20;
}
 
FLASHMEM void net::StartupConfig::fromJson(JsonObjectConst src, nvmconfig::Context c) {
  JSON_GET(src, enable_ethernet);
  JSON_GET(src, enable_dhcp);
  JSON_GET(src, enable_jsonl);
  JSON_GET(src, enable_webserver);
  JSON_GET(src, enable_websockets);
  JSON_GET(src, enable_mdns);
  JSON_GET(src, jsonl_port);
  JSON_GET(src, webserver_port);
  JSON_GET(src, mac);
  JSON_GET_AS(src, hostname, const char *);
  JSON_GET_AS(src, static_ipaddr, IPAddress);
  JSON_GET_AS(src, static_netmask, IPAddress);
  JSON_GET_AS(src, static_gw, IPAddress);
  JSON_GET_AS(src, static_dns, IPAddress);
 
  // Maximum hostname length is an industry standard (POSIX is 255 chars limits.h)
  // and also and dictated by EEPROM size.
  if (hostname.length() > 250)
    hostname = hostname.substr(0, 250);
}
 
FLASHMEM void net::StartupConfig::toJson(JsonObject target, nvmconfig::Context c) const {
  JSON_SET(target, enable_ethernet);
  JSON_SET(target, enable_dhcp);
  JSON_SET(target, enable_jsonl);
  JSON_SET(target, enable_webserver);
  JSON_SET(target, enable_websockets);
  JSON_SET(target, enable_mdns);
  JSON_SET(target, jsonl_port);
  JSON_SET(target, webserver_port);
  JSON_SET(target, mac);
  JSON_SET(target, hostname);
  JSON_SET(target, static_ipaddr);
  JSON_SET(target, static_netmask);
  JSON_SET(target, static_gw);
  JSON_SET(target, static_dns);
}
 
FLASHMEM int net::StartupConfig::begin_ip() {
  if (!enable_ethernet) {
    LOG_ALWAYS("Ethernet disabled by user setting");
  }
 
  // if(!net::Ethernet.linkState()) {
  //  TODO: This is only a workaround in the moment and requires later
  //        setup with the onLinkState callback
  // LOG_ALWAYS("Ethernet: No link detected. Skipping Ethernet setup.");
  // return;
  //}
 
  if (valid(mac))
    net::Ethernet.setMACAddress(mac.mac); // else keep system default
 
  LOG2("MAC: ", toString(mac).c_str())
 
  // TODO: Should indicate the state of the IP aquisition on the
  //       LEDs of the LUCIDAC front.
 
  if (enable_dhcp) {
    LOG2("DHCP with Hostname: ", hostname.c_str());
    net::Ethernet.setHostname(hostname.c_str());
    if (!net::Ethernet.begin()) {
      LOG_ERROR("Error starting ethernet DHCP client.");
      return 1;
    }
    LOG(ANABRID_DEBUG_INIT, "Waiting for IP address on ethernet...");
    if (!net::Ethernet.waitForLocalIP(10 * 1000 /* ms*/)) {
      LOG_ERROR("Error getting IP address.");
      return 2;
    }
  } else {
    if (!valid(static_ipaddr) || !valid(static_netmask) || !valid(static_gw)) {
      LOG_ERROR("Illegal ipaddr/netmask/gw. Recovering with defaults.");
      auto defaults = StartupConfig();
      static_ipaddr = defaults.static_ipaddr;
      static_netmask = defaults.static_netmask;
      static_gw = defaults.static_gw;
    }
    if (!net::Ethernet.begin(static_ipaddr, static_netmask, static_gw)) {
      LOG_ERROR("Error starting ethernet with static IP address.");
      return 3;
    }
    if (!valid(static_dns)) {
      LOG_ERROR("Illegal dns server. Recovering with defaults.")
      auto defaults = StartupConfig();
      static_dns = defaults.static_dns;
    }
    net::Ethernet.setDnsServerIP(static_dns);
  }
 
  LOG4("JSONL Listening on ", net::Ethernet.localIP(), ":", jsonl_port);
  return 0;
}
 
FLASHMEM void net::StartupConfig::begin_mdns() {
  MDNS.begin(hostname.c_str());
  if (enable_jsonl)
    MDNS.addService("_lucijsonl", "_tcp", jsonl_port);
  if (enable_webserver)
    MDNS.addService("_http", "_tcp", webserver_port);
}
 
/*void net::StartupConfig::begin() {
  net::register_settings();
  begin_ip();
}*/
 
FLASHMEM void net::status(JsonObject &msg_out) {
  msg_out["interfaceStatus"] = net::Ethernet.interfaceStatus();
 
  // TODO: Move to net_get
  msg_out["otp_mac"] = std::string(MacAddress::otp()); // one time programmable system/permanent mac
 
  auto ip = msg_out.createNestedObject("ip");
  ip["local"] = net::Ethernet.localIP();
  ip["broadcast"] = net::Ethernet.broadcastIP();
  ip["gateway"] = net::Ethernet.gatewayIP();
 
  auto dhcp = msg_out.createNestedObject("dhcp");
  dhcp["active"] = net::Ethernet.isDHCPActive(); // probably move to net_get
  dhcp["enabled"] = net::Ethernet.isDHCPEnabled();
 
  auto link = msg_out.createNestedObject("link");
  link["state"] = net::Ethernet.linkState();
  link["speed"] = net::Ethernet.linkSpeed(); // in Mpbs
  link["isCrossover"] = net::Ethernet.linkIsCrossover();
  link["isFullDuplex"] = net::Ethernet.linkIsFullDuplex();
 
  // msg_out["tcp_port"] = net::ethernet::Ethernet.server_port;
  // auto settings = msg_out.createNestedObject("settings");
  // eth.write_to_json(settings);
}
 
#endif // ARDUINO