410 lines
14 KiB
C++
410 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsProtocolProxyService_h__
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#define nsProtocolProxyService_h__
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#include "nsString.h"
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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#include "nsTArray.h"
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#include "nsIProtocolProxyService2.h"
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#include "nsIProtocolProxyFilter.h"
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#include "nsIProxyInfo.h"
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#include "nsIObserver.h"
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#include "nsDataHashtable.h"
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#include "nsHashKeys.h"
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#include "prio.h"
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#include "mozilla/Attributes.h"
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typedef nsDataHashtable<nsCStringHashKey, uint32_t> nsFailedProxyTable;
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class nsProxyInfo;
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struct nsProtocolInfo;
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class nsIPrefBranch;
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class nsISystemProxySettings;
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class nsPACMan;
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// CID for the nsProtocolProxyService class
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// 091eedd8-8bae-4fe3-ad62-0c87351e640d
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#define NS_PROTOCOL_PROXY_SERVICE_IMPL_CID \
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{ 0x091eedd8, 0x8bae, 0x4fe3, \
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{ 0xad, 0x62, 0x0c, 0x87, 0x35, 0x1e, 0x64, 0x0d } }
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class nsProtocolProxyService final : public nsIProtocolProxyService2
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, public nsIObserver
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIPROTOCOLPROXYSERVICE2
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NS_DECL_NSIPROTOCOLPROXYSERVICE
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NS_DECL_NSIOBSERVER
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_PROTOCOL_PROXY_SERVICE_IMPL_CID)
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nsProtocolProxyService();
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nsresult Init();
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nsresult DeprecatedBlockingResolve(nsIChannel *aChannel,
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uint32_t aFlags,
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nsIProxyInfo **retval);
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protected:
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friend class nsAsyncResolveRequest;
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~nsProtocolProxyService();
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/**
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* This method is called whenever a preference may have changed or
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* to initialize all preferences.
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*
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* @param prefs
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* This must be a pointer to the root pref branch.
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* @param name
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* This can be the name of a fully-qualified preference, or it can
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* be null, in which case all preferences will be initialized.
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*/
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void PrefsChanged(nsIPrefBranch *prefs, const char *name);
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/**
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* This method is called to create a nsProxyInfo instance from the given
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* PAC-style proxy string. It parses up to the end of the string, or to
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* the next ';' character.
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*
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* @param proxy
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* The PAC-style proxy string to parse. This must not be null.
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* @param aResolveFlags
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* The flags passed to Resolve or AsyncResolve that are stored in
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* proxyInfo.
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* @param result
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* Upon return this points to a newly allocated nsProxyInfo or null
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* if the proxy string was invalid.
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*
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* @return A pointer beyond the parsed proxy string (never null).
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*/
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const char * ExtractProxyInfo(const char *proxy,
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uint32_t aResolveFlags,
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nsProxyInfo **result);
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/**
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* Load the specified PAC file.
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*
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* @param pacURI
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* The URI spec of the PAC file to load.
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*/
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nsresult ConfigureFromPAC(const nsCString &pacURI, bool forceReload);
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/**
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* This method builds a list of nsProxyInfo objects from the given PAC-
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* style string.
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*
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* @param pacString
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* The PAC-style proxy string to parse. This may be empty.
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* @param aResolveFlags
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* The flags passed to Resolve or AsyncResolve that are stored in
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* proxyInfo.
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* @param result
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* The resulting list of proxy info objects.
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*/
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void ProcessPACString(const nsCString &pacString,
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uint32_t aResolveFlags,
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nsIProxyInfo **result);
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/**
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* This method generates a string valued identifier for the given
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* nsProxyInfo object.
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*
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* @param pi
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* The nsProxyInfo object from which to generate the key.
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* @param result
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* Upon return, this parameter holds the generated key.
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*/
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void GetProxyKey(nsProxyInfo *pi, nsCString &result);
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/**
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* @return Seconds since start of session.
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*/
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uint32_t SecondsSinceSessionStart();
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/**
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* This method removes the specified proxy from the disabled list.
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*
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* @param pi
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* The nsProxyInfo object identifying the proxy to enable.
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*/
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void EnableProxy(nsProxyInfo *pi);
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/**
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* This method adds the specified proxy to the disabled list.
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*
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* @param pi
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* The nsProxyInfo object identifying the proxy to disable.
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*/
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void DisableProxy(nsProxyInfo *pi);
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/**
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* This method tests to see if the given proxy is disabled.
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*
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* @param pi
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* The nsProxyInfo object identifying the proxy to test.
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*
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* @return True if the specified proxy is disabled.
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*/
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bool IsProxyDisabled(nsProxyInfo *pi);
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/**
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* This method queries the protocol handler for the given scheme to check
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* for the protocol flags and default port.
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*
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* @param uri
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* The URI to query.
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* @param info
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* Holds information about the protocol upon return. Pass address
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* of structure when you call this method. This parameter must not
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* be null.
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*/
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nsresult GetProtocolInfo(nsIURI *uri, nsProtocolInfo *result);
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/**
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* This method is an internal version nsIProtocolProxyService::newProxyInfo
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* that expects a string literal for the type.
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*
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* @param type
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* The proxy type.
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* @param host
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* The proxy host name (UTF-8 ok).
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* @param port
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* The proxy port number.
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* @param username
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* The username for the proxy (ASCII). May be "", but not null.
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* @param password
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* The password for the proxy (ASCII). May be "", but not null.
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* @param flags
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* The proxy flags (nsIProxyInfo::flags).
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* @param timeout
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* The failover timeout for this proxy.
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* @param next
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* The next proxy to try if this one fails.
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* @param aResolveFlags
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* The flags passed to resolve (from nsIProtocolProxyService).
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* @param result
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* The resulting nsIProxyInfo object.
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*/
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nsresult NewProxyInfo_Internal(const char *type,
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const nsACString &host,
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int32_t port,
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const nsACString &username,
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const nsACString &password,
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uint32_t flags,
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uint32_t timeout,
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nsIProxyInfo *next,
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uint32_t aResolveFlags,
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nsIProxyInfo **result);
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/**
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* This method is an internal version of Resolve that does not query PAC.
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* It performs all of the built-in processing, and reports back to the
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* caller with either the proxy info result or a flag to instruct the
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* caller to use PAC instead.
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*
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* @param channel
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* The channel to test.
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* @param appId
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* The id of the app making the query.
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* @param isInBrowser
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* True if the iframe has mozbrowser but has no mozapp attribute.
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* @param info
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* Information about the URI's protocol.
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* @param flags
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* The flags passed to either the resolve or the asyncResolve method.
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* @param usePAC
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* If this flag is set upon return, then PAC should be queried to
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* resolve the proxy info.
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* @param result
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* The resulting proxy info or null.
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*/
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nsresult Resolve_Internal(nsIChannel *channel,
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uint32_t appId,
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bool isInBrowser,
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const nsProtocolInfo &info,
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uint32_t flags,
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bool *usePAC,
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nsIProxyInfo **result);
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/**
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* This method applies the registered filters to the given proxy info
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* list, and returns a possibly modified list.
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*
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* @param channel
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* The channel corresponding to this proxy info list.
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* @param info
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* Information about the URI's protocol.
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* @param proxyInfo
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* The proxy info list to be modified. This is an inout param.
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*/
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void ApplyFilters(nsIChannel *channel, const nsProtocolInfo &info,
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nsIProxyInfo **proxyInfo);
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/**
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* This method is a simple wrapper around ApplyFilters that takes the
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* proxy info list inout param as a nsCOMPtr.
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*/
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inline void ApplyFilters(nsIChannel *channel, const nsProtocolInfo &info,
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nsCOMPtr<nsIProxyInfo> &proxyInfo)
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{
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nsIProxyInfo *pi = nullptr;
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proxyInfo.swap(pi);
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ApplyFilters(channel, info, &pi);
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proxyInfo.swap(pi);
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}
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/**
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* This method prunes out disabled and disallowed proxies from a given
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* proxy info list.
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*
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* @param info
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* Information about the URI's protocol.
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* @param proxyInfo
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* The proxy info list to be modified. This is an inout param.
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*/
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void PruneProxyInfo(const nsProtocolInfo &info,
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nsIProxyInfo **proxyInfo);
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/**
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* This method populates mHostFiltersArray from the given string.
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*
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* @param hostFilters
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* A "no-proxy-for" exclusion list.
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*/
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void LoadHostFilters(const char *hostFilters);
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/**
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* This method checks the given URI against mHostFiltersArray.
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*
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* @param uri
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* The URI to test.
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* @param defaultPort
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* The default port for the given URI.
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*
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* @return True if the URI can use the specified proxy.
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*/
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bool CanUseProxy(nsIURI *uri, int32_t defaultPort);
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/**
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* Disable Prefetch in the DNS service if a proxy is in use.
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*
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* @param aProxy
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* The proxy information
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*/
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void MaybeDisableDNSPrefetch(nsIProxyInfo *aProxy);
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private:
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nsresult SetupPACThread();
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nsresult ResetPACThread();
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nsresult ReloadNetworkPAC();
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public:
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// The Sun Forte compiler and others implement older versions of the
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// C++ standard's rules on access and nested classes. These structs
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// need to be public in order to deal with those compilers.
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struct HostInfoIP {
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uint16_t family;
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uint16_t mask_len;
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PRIPv6Addr addr; // possibly IPv4-mapped address
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};
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struct HostInfoName {
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char *host;
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uint32_t host_len;
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};
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protected:
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// simplified array of filters defined by this struct
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struct HostInfo {
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bool is_ipaddr;
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int32_t port;
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union {
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HostInfoIP ip;
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HostInfoName name;
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};
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HostInfo()
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: is_ipaddr(false)
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{ /* other members intentionally uninitialized */ }
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~HostInfo() {
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if (!is_ipaddr && name.host)
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free(name.host);
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}
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};
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// An instance of this struct is allocated for each registered
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// nsIProtocolProxyFilter and each nsIProtocolProxyChannelFilter.
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struct FilterLink {
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struct FilterLink *next;
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uint32_t position;
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nsCOMPtr<nsIProtocolProxyFilter> filter;
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nsCOMPtr<nsIProtocolProxyChannelFilter> channelFilter;
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FilterLink(uint32_t p, nsIProtocolProxyFilter *f)
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: next(nullptr), position(p), filter(f), channelFilter(nullptr) {}
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FilterLink(uint32_t p, nsIProtocolProxyChannelFilter *cf)
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: next(nullptr), position(p), filter(nullptr), channelFilter(cf) {}
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// Chain deletion to simplify cleaning up the filter links
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~FilterLink() { if (next) delete next; }
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};
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private:
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// Private methods to insert and remove FilterLinks from the FilterLink chain.
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nsresult InsertFilterLink(FilterLink *link, uint32_t position);
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nsresult RemoveFilterLink(nsISupports *givenObject);
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protected:
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// Indicates if local hosts (plain hostnames, no dots) should use the proxy
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bool mFilterLocalHosts;
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// Holds an array of HostInfo objects
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nsTArray<nsAutoPtr<HostInfo> > mHostFiltersArray;
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// Points to the start of a sorted by position, singly linked list
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// of FilterLink objects.
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FilterLink *mFilters;
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uint32_t mProxyConfig;
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nsCString mHTTPProxyHost;
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int32_t mHTTPProxyPort;
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nsCString mFTPProxyHost;
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int32_t mFTPProxyPort;
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nsCString mHTTPSProxyHost;
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int32_t mHTTPSProxyPort;
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nsCString mSOCKSProxyHost;
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int32_t mSOCKSProxyPort;
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int32_t mSOCKSProxyVersion;
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bool mSOCKSProxyRemoteDNS;
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bool mProxyOverTLS;
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RefPtr<nsPACMan> mPACMan; // non-null if we are using PAC
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nsCOMPtr<nsISystemProxySettings> mSystemProxySettings;
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PRTime mSessionStart;
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nsFailedProxyTable mFailedProxies;
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int32_t mFailedProxyTimeout;
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private:
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nsresult AsyncResolveInternal(nsIChannel *channel, uint32_t flags,
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nsIProtocolProxyCallback *callback,
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nsICancelable **result,
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bool isSyncOK);
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsProtocolProxyService, NS_PROTOCOL_PROXY_SERVICE_IMPL_CID)
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#endif // !nsProtocolProxyService_h__
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