137 lines
5.1 KiB
Objective-C
137 lines
5.1 KiB
Objective-C
/******************************************************************************
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* $Id$
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*
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* Copyright (c) 2005-2006 Transmission authors and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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#import "PortChecker.h"
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#import "transmission.h"
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#import "PrefsController.h"
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@implementation PortChecker
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- (id) initWithDelegate: (id) delegate
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{
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if ((self = [super init]))
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{
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fDelegate = delegate;
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}
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return self;
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}
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- (port_status_t) status
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{
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return fStatus;
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}
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- (void) probePort: (int) portNumber
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{
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NSURLRequest * portProbeRequest = [NSURLRequest requestWithURL: [NSURL URLWithString:
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[NSString stringWithFormat: @"https://www.grc.com/x/portprobe=%d", portNumber]]
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cachePolicy: NSURLRequestReloadIgnoringCacheData timeoutInterval: 15.0];
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NSURLConnection * portProbeConnection;
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if ((portProbeConnection = [NSURLConnection connectionWithRequest: portProbeRequest delegate: self]))
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fPortProbeData = [[NSMutableData data] retain];
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else
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{
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NSLog(@"Unable to get port status: failed to initiate connection");
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[self callBackWithStatus: PORT_STATUS_ERROR];
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}
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}
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- (void) callBackWithStatus: (port_status_t) status
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{
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fStatus = status;
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if (fDelegate && [fDelegate respondsToSelector: @selector(portCheckerDidFinishProbing:)])
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[fDelegate portCheckerDidFinishProbing: self];
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}
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#pragma mark NSURLConnection delegate methods
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- (void) connection: (NSURLConnection *) connection didReceiveResponse: (NSURLResponse *) response
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{
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[fPortProbeData setLength: 0];
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}
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- (void) connection: (NSURLConnection *) connection didReceiveData: (NSData *) data
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{
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[fPortProbeData appendData: data];
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}
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- (void) connection: (NSURLConnection *) connection didFailWithError: (NSError *) error
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{
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NSLog(@"Unable to get port status: connection failed (%@)", [error localizedDescription]);
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[self callBackWithStatus: PORT_STATUS_ERROR];
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[fPortProbeData release];
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}
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- (void) connectionDidFinishLoading: (NSURLConnection *) connection
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{
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NSXMLDocument * shieldsUpProbe = [[NSXMLDocument alloc] initWithData: fPortProbeData
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options: NSXMLDocumentTidyHTML error: nil];
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if (shieldsUpProbe)
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{
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NSArray * nodes = [shieldsUpProbe nodesForXPath: @"/html/body/center/table[3]/tr/td[2]" error: nil];
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if ([nodes count] != 1)
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{
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NSArray * title = [shieldsUpProbe nodesForXPath: @"/html/head/title" error: nil];
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// This may happen when we probe twice too quickly
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if ([title count] != 1 || ![[[title objectAtIndex: 0] stringValue] isEqualToString:
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@"NanoProbe System Already In Use"])
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{
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NSLog(@"Unable to get port status: invalid (outdated) XPath expression");
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[[shieldsUpProbe XMLData] writeToFile: @"/tmp/shieldsUpProbe.html" atomically: YES];
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[self callBackWithStatus: PORT_STATUS_ERROR];
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}
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}
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else
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{
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NSString * portStatus = [[[[nodes objectAtIndex: 0] stringValue] stringByTrimmingCharactersInSet:
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[[NSCharacterSet letterCharacterSet] invertedSet]] lowercaseString];
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if ([portStatus isEqualToString: @"open"])
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[self callBackWithStatus: PORT_STATUS_OPEN];
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else if ([portStatus isEqualToString: @"stealth"])
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[self callBackWithStatus: PORT_STATUS_STEALTH];
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else if ([portStatus isEqualToString: @"closed"])
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[self callBackWithStatus: PORT_STATUS_CLOSED];
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else
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{
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NSLog(@"Unable to get port status: unknown port state");
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[self callBackWithStatus: PORT_STATUS_ERROR];
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}
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}
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}
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else
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{
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NSLog(@"Unable to get port status: failed to create xml document");
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[self callBackWithStatus: PORT_STATUS_ERROR];
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}
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[fPortProbeData release];
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}
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@end
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