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/* vim:set ts=4 sw=4 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsISupports.idl"
interface nsIFile;
interface nsIServerSocketListener;
interface nsISocketTransport;
native PRNetAddr(union PRNetAddr);
[ptr] native PRNetAddrPtr(union PRNetAddr);
typedef unsigned long nsServerSocketFlag;
/**
* nsIServerSocket
*
* An interface to a server socket that can accept incoming connections.
*/
[scriptable, uuid(7a9c39cb-a13f-4eef-9bdf-a74301628742)]
interface nsIServerSocket : nsISupports
{
/**
* @name Server Socket Flags
* These flags define various socket options.
* @{
*/
/// The server socket will only respond to connections on the
/// local loopback interface. Otherwise, it will accept connections
/// from any interface. To specify a particular network interface,
/// use initWithAddress.
const nsServerSocketFlag LoopbackOnly = 0x00000001;
/// The server socket will not be closed when Gecko is set
/// offline.
const nsServerSocketFlag KeepWhenOffline = 0x00000002;
/** @} */
/**
* init
*
* This method initializes a server socket.
*
* @param aPort
* The port of the server socket. Pass -1 to indicate no preference,
* and a port will be selected automatically.
* @param aLoopbackOnly
* If true, the server socket will only respond to connections on the
* local loopback interface. Otherwise, it will accept connections
* from any interface. To specify a particular network interface,
* use initWithAddress.
* @param aBackLog
* The maximum length the queue of pending connections may grow to.
* This parameter may be silently limited by the operating system.
* Pass -1 to use the default value.
*/
void init(in long aPort,
in boolean aLoopbackOnly,
in long aBackLog);
/**
* initSpecialConnection
*
* This method initializes a server socket and offers the ability to have
* that socket not get terminated if Gecko is set offline.
*
* @param aPort
* The port of the server socket. Pass -1 to indicate no preference,
* and a port will be selected automatically.
* @param aFlags
* Flags for the socket.
* @param aBackLog
* The maximum length the queue of pending connections may grow to.
* This parameter may be silently limited by the operating system.
* Pass -1 to use the default value.
*/
void initSpecialConnection(in long aPort,
in nsServerSocketFlag aFlags,
in long aBackLog);
/**
* initWithAddress
*
* This method initializes a server socket, and binds it to a particular
* local address (and hence a particular local network interface).
*
* @param aAddr
* The address to which this server socket should be bound.
* @param aBackLog
* The maximum length the queue of pending connections may grow to.
* This parameter may be silently limited by the operating system.
* Pass -1 to use the default value.
*/
[noscript] void initWithAddress([const] in PRNetAddrPtr aAddr, in long aBackLog);
/**
* initWithFilename
*
* This method initializes a Unix domain or "local" server socket. Such
* a socket has a name in the filesystem, like an ordinary file. To
* connect, a client supplies the socket's filename, and the usual
* permission checks on socket apply.
*
* This makes Unix domain sockets useful for communication between the
* programs being run by a specific user on a single machine: the
* operating system takes care of authentication, and the user's home
* directory or profile directory provide natural per-user rendezvous
* points.
*
* Since Unix domain sockets are always local to the machine, they are
* not affected by the nsIIOService's 'offline' flag.
*
* The system-level socket API may impose restrictions on the length of
* the filename that are stricter than those of the underlying
* filesystem. If the file name is too long, this returns
* NS_ERROR_FILE_NAME_TOO_LONG.
*
* All components of the path prefix of |aPath| must name directories;
* otherwise, this returns NS_ERROR_FILE_NOT_DIRECTORY.
*
* This call requires execute permission on all directories containing
* the one in which the socket is to be created, and write and execute
* permission on the directory itself. Otherwise, this returns
* NS_ERROR_CONNECTION_REFUSED.
*
* This call creates the socket's directory entry. There must not be
* any existing entry with the given name. If there is, this returns
* NS_ERROR_SOCKET_ADDRESS_IN_USE.
*
* On systems that don't support Unix domain sockets at all, this
* returns NS_ERROR_SOCKET_ADDRESS_NOT_SUPPORTED.
*
* @param aPath nsIFile
* The file name at which the socket should be created.
*
* @param aPermissions unsigned long
* Unix-style permission bits to be applied to the new socket.
*
* Note about permissions: Linux's unix(7) man page claims that some
* BSD-derived systems ignore permissions on UNIX-domain sockets;
* NetBSD's bind(2) man page agrees, but says it does check now (dated
* 2005). POSIX has required 'connect' to fail if write permission on
* the socket itself is not granted since 2003 (Issue 6). NetBSD says
* that the permissions on the containing directory (execute) have
* always applied, so creating sockets in appropriately protected
* directories should be secure on both old and new systems.
*/
void initWithFilename(in nsIFile aPath, in unsigned long aPermissions,
in long aBacklog);
/**
* close
*
* This method closes a server socket. This does not affect already
* connected client sockets (i.e., the nsISocketTransport instances
* created from this server socket). This will cause the onStopListening
* event to asynchronously fire with a status of NS_BINDING_ABORTED.
*/
void close();
/**
* asyncListen
*
* This method puts the server socket in the listening state. It will
* asynchronously listen for and accept client connections. The listener
* will be notified once for each client connection that is accepted. The
* listener's onSocketAccepted method will be called on the same thread
* that called asyncListen (the calling thread must have a nsIEventTarget).
*
* The listener will be passed a reference to an already connected socket
* transport (nsISocketTransport). See below for more details.
*
* @param aListener
* The listener to be notified when client connections are accepted.
*/
void asyncListen(in nsIServerSocketListener aListener);
/**
* Returns the port of this server socket.
*/
readonly attribute long port;
/**
* Returns the address to which this server socket is bound. Since a
* server socket may be bound to multiple network devices, this address
* may not necessarily be specific to a single network device. In the
* case of an IP socket, the IP address field would be zerod out to
* indicate a server socket bound to all network devices. Therefore,
* this method cannot be used to determine the IP address of the local
* system. See nsIDNSService::myHostName if this is what you need.
*/
[noscript] PRNetAddr getAddress();
};
/**
* nsIServerSocketListener
*
* This interface is notified whenever a server socket accepts a new connection.
* The transport is in the connected state, and read/write streams can be opened
* using the normal nsITransport API. The address of the client can be found by
* calling the nsISocketTransport::GetAddress method or by inspecting
* nsISocketTransport::GetHost, which returns a string representation of the
* client's IP address (NOTE: this may be an IPv4 or IPv6 string literal).
*/
[scriptable, uuid(836d98ec-fee2-4bde-b609-abd5e966eabd)]
interface nsIServerSocketListener : nsISupports
{
/**
* onSocketAccepted
*
* This method is called when a client connection is accepted.
*
* @param aServ
* The server socket.
* @param aTransport
* The connected socket transport.
*/
void onSocketAccepted(in nsIServerSocket aServ,
in nsISocketTransport aTransport);
/**
* onStopListening
*
* This method is called when the listening socket stops for some reason.
* The server socket is effectively dead after this notification.
*
* @param aServ
* The server socket.
* @param aStatus
* The reason why the server socket stopped listening. If the
* server socket was manually closed, then this value will be
* NS_BINDING_ABORTED.
*/
void onStopListening(in nsIServerSocket aServ, in nsresult aStatus);
};
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