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//
// HostsHack.m
// VKPC
//
// Created by Eugene on 10/30/14.
// Copyright (c) 2014 Eugene Z. All rights reserved.
//
#import "HostsHack.h"
#import "HostsHackWindowController.h"
#import "AppDelegate.h"
#include <stdio.h>
#ifdef DEBUG
#include <time.h>
#endif
NSString * const VKPCHostsHackTaskFinished = @"VKPCHostsHackTaskFinished";
static BOOL hackFound = NO;
static HostsHackWindowController *windowController = nil;
#ifdef DEBUG
static char *testPath = "/tmp/vkpc_test";
#endif
@implementation HostsHack
static NSString *readLineASNSString(FILE *file) {
char *line = NULL;
size_t len = 0;
getline(&line, &len, file);
return [NSString stringWithUTF8String:line];
}
+ (void)check {
hackFound = NO;
#ifdef DEBUG
clock_t begin = clock();
#endif
FILE *file = fopen(VKPCHostsFile, "r");
if (file == NULL) {
NSLog(@"[HostsHack check] !file, returning");
return;
}
while (!feof(file)) {
NSString *line = readLineASNSString(file);
// NSLog(@"[hostshack] line: %@", line);
NSRange rng = [line rangeOfString:[NSString stringWithUTF8String:VKPCWSClientHost]];
if (rng.location != NSNotFound) {
// if ([line containsString:[NSString stringWithUTF8String:VKPCWSClientHost]]) {
line = [line stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
if ([line hasPrefix:@"127.0.0.1"]) {
hackFound = YES;
break;
}
}
}
fclose(file);
#ifdef DEBUG
NSLog(@"[HostsHack check] file reading time: %lf", (double)(clock() - begin) / CLOCKS_PER_SEC);
NSLog(@"[HostsHack check] found: %s", hackFound ? "YES" : "NO");
#endif
}
static void showAlert(NSString *text, NSString *informativeText) {
NSAlert *alert = [[NSAlert alloc] init];
[alert setMessageText:text];
[alert setInformativeText:informativeText];
[alert setAlertStyle:NSWarningAlertStyle];
[alert runModal];
}
+ (void)hack {
// return;
AuthorizationRef auth = NULL;
OSStatus err;
err = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, kAuthorizationFlagInteractionAllowed, &auth);
if (err != errAuthorizationSuccess) {
showAlert(@"VKPC Error", [NSString stringWithFormat:@"Failed to obtain authorization. Code = %d", err]);
[windowController setButtonRetry];
return;
}
const char *path = [[NSProcessInfo processInfo].arguments[0] UTF8String];
char * const args[] = {"--hostshack", NULL};
[windowController setButtonWait];
err = AuthorizationExecuteWithPrivileges(auth, path, kAuthorizationFlagDefaults, args, NULL);
if (err != errAuthorizationSuccess) {
showAlert(@"VKPC Error", [NSString stringWithFormat:@"Failed to run command with adminstrative privileges. Code = %d", err]);
[windowController setButtonRetry];
return;
}
[[NSDistributedNotificationCenter defaultCenter] addObserver:(id)[self class]
selector:@selector(hackTaskFinished:)
name:VKPCHostsHackTaskFinished
object:nil];
}
+ (void)hackTaskFinished:(id)notification {
[[NSDistributedNotificationCenter defaultCenter] removeObserver:(id)[self class]];
[self check];
if (hackFound) {
[windowController close];
[[AppDelegate shared] continueRunning];
} else {
[self showUnableAlert];
}
}
+ (void)showUnableAlert {
showAlert(@"VKPC Error", [NSString stringWithFormat:
@"Unfortunately, VKPC failed to automatically edit the file %@. Now you have to make it manually.\n\n"
"Please open the file %@ with root privileges and add following line at the end:\n\n"
"127.0.0.1\t%@\n\n"
"Then save the file and relaunch the app.",
[NSString stringWithUTF8String:VKPCHostsFile],
[NSString stringWithUTF8String:VKPCHostsFile],
[NSString stringWithUTF8String:VKPCWSClientHost]]);
}
+ (int)doHack {
// sleep(2);
char *path = VKPCHostsFile;
FILE *file = fopen(path, "a");
if (!file) {
NSLog(@"[HostsHack doHack] error opening file %s, returning error", path);
return -1;
}
fputs("\n#VK Player Controller", file);
fputs([[NSString stringWithFormat:@"\n127.0.0.1\t%@", [NSString stringWithUTF8String:VKPCWSClientHost]] UTF8String], file);
fclose(file);
return 0;
}
+ (BOOL)found {
return hackFound;
}
+ (void)showWindow {
if (!windowController) {
windowController = [[HostsHackWindowController alloc] initWithWindowNibName:@"HostsHackWindow"];
}
[windowController showWindow:nil];
[windowController.window makeKeyAndOrderFront:nil];
[windowController.window setLevel:kCGFloatingWindowLevel];
}
@end
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