[[!meta copyright="Copyright © 2000, 2008, 2010 Free Software Foundation, Inc."]] [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable id="license" text="Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU Free Documentation License|/fdl]]."]]"""]] For each supported `PF_*` protocol family, there is a file `/servers/socket/N` where `N` is the numberic value fo the `PF_*` symbol. Right now [[`PF_LOCAL`|translator/pflocal]] (a.k.a. `PF_UNIX`) and [[`PF_INET`|translator/pfinet]] (together with [[`PF_INET6`|translator/pfinet/ipv6]]) are supported. User programs open those files, and use the `socket_create` [[RPC]] to make a new socket. With that socket, they can use the other `socket_*` RPCs and also the `io_*` RPCs. The `socket_*` RPCs are essentially clones of the [[Unix]] [[system call]]s in question. The only exception is `sockaddrs`, which are implemented as [[ports|libports]] instead of the opaque data arrays they are in the system calls. You manipulate `sockaddr` ports with the `socket_create_address`, `socket_fabricate_address`, and `socket_whatis_address` calls. The `sockaddr` port is then used in socket calls like `socket_connect` and `socket_accept`. `PF_INET` `sockaddr` ports are manipulated with `socket_create_address` from the usual `struct sockaddr_in`. `PF_LOCAL` `sockaddr` ports are stored by `S_IFSOCK` filesystem nodes; you find the address associated with a node with `ifsock_getsockaddr`. The [[file_system_server|translator]] will get a `sockaddr` to return with `socket_fabricate_address`.