rfc:socket_getaddrinfo

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PHP RFC: Implement socket_getaddrinfo()

Introduction

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.

Proposal

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, ``socket_addrinfo_explain`` 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
<?php
$addrinfo = socket_addrinfo_lookup('127.0.0.1', 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 127.0.0.1:2000 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 SAPIs

None

To Existing Extensions

Socket acquired new functionality

To Opcache

None

New Constants

Exposing the AI_* family of constants.

Proposed Voting Choices

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

Implement socket_getaddrinfo family
Real name Yes No
bishop (bishop)  
colinodell (colinodell)  
daverandom (daverandom)  
derick (derick)  
hywan (hywan)  
kguest (kguest)  
lstrojny (lstrojny)  
mariano (mariano)  
trowski (trowski)  
Count: 9 0

Vote Start: 2016-08-24 15:23 UTC

Vote End: 2016-08-31 23:59 UTC

References

rfc/socket_getaddrinfo.1472052255.txt.gz · Last modified: 2017/09/22 13:28 (external edit)