Raspberry PI mdns getaddrinfo 3008 错误

Question

我有这个示例 Node.js 脚本：

var mdns = require('mdns');

var browser = mdns.createBrowser(mdns.tcp('http'));
browser.on('error', function (error) {
    console.log("error");
    console.log(error);
});
browser.on('serviceUp', function (service) {
    console.log("serviceUp");
    console.log(service);
});
browser.start();

在我的 Mac 上它工作正常，并且找到了两个服务。如果我运行我的 Raspberry PI 2 运行ning Raspbean 上的完全相同的脚本（连接到同一个网络），我得到这个输出：

pi@raspberrypi ~ $ node mdns.js 
*** WARNING *** The program 'node' uses the Apple Bonjour compatibility layer of Avahi.
*** WARNING *** Please fix your application to use the native API of Avahi!
*** WARNING *** For more information see <http://0pointer.de/avahi-compat?s=libdns_sd&e=node>
*** WARNING *** The program 'node' called 'DNSServiceRegister()' which is not supported (or only supported partially) in the Apple Bonjour compatibility layer of Avahi.
*** WARNING *** Please fix your application to use the native API of Avahi!
*** WARNING *** For more information see <http://0pointer.de/avahi-compat?s=libdns_sd&e=node&f=DNSServiceRegister>
error
{ [Error: getaddrinfo -3008] code: -3008, errno: -3008, syscall: 'getaddrinfo' }
error
{ [Error: getaddrinfo -3008] code: -3008, errno: -3008, syscall: 'getaddrinfo' }

A issue on the mdns GitHub，声明忽略警告是公平的。

但是那两个错误呢？我的 Raspberry PI 是否存在某种配置问题？

Answer 1

针对此 GitHub 问题找到了解决方案： https://github.com/agnat/node_mdns/issues/130

修改Browser.defaultResolverSequence inside lib/browser.js in mdns.

Browser.defaultResolverSequence = [
  rst.DNSServiceResolve(), 'DNSServiceGetAddrInfo' in dns_sd ? rst.DNSServiceGetAddrInfo() : rst.getaddrinfo({families:[4]})
, rst.makeAddressesUnique()
];

Answer 2

在本地修改节点模块代码是一种不好的做法。

您在创建mdns浏览器时最好做到以下几点：

var sequence = [
  mdns.rst.DNSServiceResolve(),
  'DNSServiceGetAddrInfo' in mdns.dns_sd ? mdns.rst.DNSServiceGetAddrInfo() : mdns.rst.getaddrinfo({families:[4]}),
  mdns.rst.makeAddressesUnique()
];
var browser = mdns.createBrowser(mdns.tcp('http'), {resolverSequence: sequence});

如评论中所述：https://github.com/agnat/node_mdns/issues/130#issuecomment-120731155

因此，它将避免错误，并允许从事该项目的每个人都获得相同的版本，而不必修改本地 mdns 代码。

Raspberry PI mdns getaddrinfo 3008 错误

Raspberry PI mdns getaddrinfo 3008 error

node.js

raspberry-pi

raspbian

mdns

raspberry-pi2