From 523e74d5f4d388cc7aadbf4b5470844f2108a0cb Mon Sep 17 00:00:00 2001 From: Thomas Schwinge Date: Sun, 28 Sep 2008 15:06:27 +0200 Subject: From a Thomas Bushnell email, debian-hurd, 2000-03-05. --- hurd/networking.mdwn | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 hurd/networking.mdwn (limited to 'hurd/networking.mdwn') diff --git a/hurd/networking.mdwn b/hurd/networking.mdwn new file mode 100644 index 00000000..6e0ac56e --- /dev/null +++ b/hurd/networking.mdwn @@ -0,0 +1,31 @@ +[[meta copyright="Copyright © 2000, 2008 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]] 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 +syscalls in question. + +The only exception is `sockaddrs`, which are implemented as [[ports|libports]] +instead of the opaque data arrays they are in the syscalls. 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`. -- cgit v1.2.3