/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "nsITransport.idl"
#include "nsINetAddr.idl"

interface nsIInterfaceRequestor;

native PRNetAddr(union PRNetAddr);

/**
 * nsISocketTransport
 *
 * NOTE: Connection setup is triggered by opening an input or output stream,
 * it does not start on its own. Completion of the connection setup is
 * indicated by a STATUS_CONNECTED_TO notification to the event sink (if set).
 *
 * NOTE: This is a free-threaded interface, meaning that the methods on
 * this interface may be called from any thread.
 */
[scriptable, uuid(91ca3523-fc52-4dea-b167-ef8f56473dde)]
interface nsISocketTransport : nsITransport 
{
    /**
     * Get the host for the underlying socket connection.
     */
    readonly attribute AUTF8String host;

    /**
     * Get the port for the underlying socket connection.
     */
    readonly attribute long port;

    /** 
     * Returns the IP address of the socket connection peer. This
     * attribute is defined only once a connection has been established.
     */
    [noscript] PRNetAddr getPeerAddr();

    /** 
     * Returns the IP address of the initiating end. This attribute
     * is defined only once a connection has been established.
     */
    [noscript] PRNetAddr getSelfAddr();

    /** 
     * Returns a scriptable version of getPeerAddr. This attribute is defined
     * only once a connection has been established.
     */
    nsINetAddr getScriptablePeerAddr();

    /** 
     * Returns a scriptable version of getSelfAddr. This attribute is defined
     * only once a connection has been established.
     */
    nsINetAddr getScriptableSelfAddr();

    /**
     * Security info object returned from the secure socket provider.  This
     * object supports nsISSLSocketControl, nsITransportSecurityInfo, and
     * possibly other interfaces.
     *
     * This attribute is only available once the socket is connected.
     */
    readonly attribute nsISupports securityInfo;
    
    /**
     * Security notification callbacks passed to the secure socket provider
     * via nsISSLSocketControl at socket creation time.
     *
     * NOTE: this attribute cannot be changed once a stream has been opened.
     */
    attribute nsIInterfaceRequestor securityCallbacks;
   
    /**
     * Test if this socket transport is (still) connected.
     */
    boolean isAlive();

    /**
     * Socket timeouts in seconds.  To specify no timeout, pass PR_UINT32_MAX
     * as aValue to setTimeout.  The implementation may truncate timeout values
     * to a smaller range of values (e.g., 0 to 0xFFFF).
     */
    unsigned long getTimeout(in unsigned long aType);
    void          setTimeout(in unsigned long aType, in unsigned long aValue);

    /**
     * Values for the aType parameter passed to get/setTimeout.
     */
    const unsigned long TIMEOUT_CONNECT    = 0;
    const unsigned long TIMEOUT_READ_WRITE = 1;

    /**
     * nsITransportEventSink status codes.
     *
     * Although these look like XPCOM error codes and are passed in an nsresult
     * variable, they are *not* error codes.  Note that while they *do* overlap
     * with existing error codes in Necko, these status codes are confined
     * within a very limited context where no error codes may appear, so there
     * is no ambiguity.
     *
     * The values of these status codes must never change.
     *
     * The status codes appear in near-chronological order (not in numeric
     * order).  STATUS_RESOLVING may be skipped if the host does not need to be
     * resolved.  STATUS_WAITING_FOR is an optional status code, which the impl
     * of this interface may choose not to generate.
     *
     * In C++, these constants have a type of uint32_t, so C++ callers must use
     * the NS_NET_STATUS_* constants defined below, which have a type of
     * nsresult.
     */
    const unsigned long STATUS_RESOLVING      = 0x804b0003;
    const unsigned long STATUS_RESOLVED       = 0x804b000b;
    const unsigned long STATUS_CONNECTING_TO  = 0x804b0007;
    const unsigned long STATUS_CONNECTED_TO   = 0x804b0004;
    const unsigned long STATUS_SENDING_TO     = 0x804b0005;
    const unsigned long STATUS_WAITING_FOR    = 0x804b000a;
    const unsigned long STATUS_RECEIVING_FROM = 0x804b0006;

    /**
     * connectionFlags is a bitmask that can be used to modify underlying 
     * behavior of the socket connection. See the flags below.
     */
    attribute unsigned long connectionFlags;

    /**
     * Values for the connectionFlags
     *
     * When making a new connection BYPASS_CACHE will force the Necko DNS 
     * cache entry to be refreshed with a new call to NSPR if it is set before
     * opening the new stream.
     */
    const unsigned long BYPASS_CACHE = (1 << 0);

    /**
     * When setting this flag, the socket will not apply any
     * credentials when establishing a connection. For example,
     * an SSL connection would not send any client-certificates
     * if this flag is set.
     */
    const unsigned long ANONYMOUS_CONNECT = (1 << 1);

    /**
     * If set, we will skip all IPv6 addresses the host may have and only
     * connect to IPv4 ones.
     */
    const unsigned long DISABLE_IPV6 = (1 << 2);

    /**
     * Socket QoS/ToS markings. Valid values are IPTOS_DSCP_AFxx or
     * IPTOS_CLASS_CSx (or IPTOS_DSCP_EF, but currently no supported
     * services require expedited-forwarding).
     * Not setting this value will leave the socket with the default
     * ToS value, which on most systems if IPTOS_CLASS_CS0 (formerly
     * IPTOS_PREC_ROUTINE).
     */
    attribute octet QoSBits;

    /**
     * TCP send and receive buffer sizes. A value of 0 means OS level
     * auto-tuning is in effect.
     */
    attribute unsigned long recvBufferSize;
    attribute unsigned long sendBufferSize;
};
