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PHP RFC: Implement socket_getaddrinfo()


This RFC targets a reported feature request in #72733. The request is that PHP expose the C level function getaddrinfo(). This is a missing nice piece to the current socket library. When dealing with variable networks it would be beneficial to allow libc to tell us what methods of connecting/listening would be most appropriate given a set of hints.


The implementation[1] I'm proposing implements 4 new functions. socket_addrinfo_lookup() will return an array of resources, with each resource corresponding to each returned addrinfo. The next two implemented methods socket_addrinfo_bind(), and socket_addrinfo_connect(), would be used to bind, or connect, to a given resource rather than make the user go through the process of creating the socket and connect/binding themselves. The last is to convert the resource to an array for examination.

socket_addrinfo_lookup(string node[, mixed service, array hints]) : array
socket_addrinfo_connect(resource $addrinfo) : resource
socket_addrinfo_bind(resource $addrinfo) : resource
socket_addrinfo_explain(resource $addrinfo) : array
$addrinfo = socket_addrinfo_lookup('', 2000, array('ai_family' => AI_INET, 'ai_socktype' => SOCK_STREAM));
$sockaddr = reset($addrinfo);
if (!$sockaddr) die ("No Valid Socket Types");
$sock = socket_addrinfo_bind($sockaddr);
// ^^ $sock is a socket resource that is bound to using TCP/IP ready for reading

Backward Incompatible Changes

New functionality; no BC issues.

Proposed PHP Version(s)

Next PHP 7.x (currently 7.2)

RFC Impact



To Existing Extensions

Socket acquired new functionality

To Opcache


New Constants

Exposing the AI_* family of constants.

Open Issues

Proposed Voting Choices

Vote to implement the new functions, would require a 2/3 majority.



rfc/socket_getaddrinfo.1471023159.txt.gz · Last modified: 2017/09/22 13:28 (external edit)