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/*
*
* Copyright (c) 2016 Apple Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "CNDomainBrowserPathUtils.h"
#import <CFNetwork/CFHostPriv.h>
#include "../../../Clients/ClientCommon.h"
static const char *EscapeLabel(const char *cstr, char label[64])
{
// Based on code on clownfish from: DNSName::GetEscapedDNSName
char *ptr = label;
while (*cstr) // While we have characters in the label...
{
char c = *cstr++;
if (c == '\\' || c == '.') // escape '\' and '.'
{
if (ptr >= label+64-2) return(NULL);
*ptr++ = '\\';
*ptr++ = c;
}
else if (c <= ' ') // escape ' ' and lower
{
if (ptr >= label+64-4) return(NULL);
*ptr++ = '\\';
*ptr++ = '0' + (c / 100);
*ptr++ = '0' + ((c / 10) % 10);
*ptr++ = '0' + (c % 10);
}
else
{
if (ptr >= label+64-1) return(NULL);
*ptr++ = c;
}
}
*ptr = 0;
return(label);
}
NSString * DomainPathToDNSDomain(NSArray * domainPath)
{
NSMutableString * dnsStr = [NSMutableString string];
char label[64];
for (NSString * next in domainPath)
{
NSString * nextLabel;
if (dnsStr.length) nextLabel = [NSString stringWithUTF8String: EscapeLabel([next UTF8String], label)];
else nextLabel = next;
[dnsStr insertString: [NSString stringWithFormat: @"%@.", nextLabel] atIndex: 0];
}
return(dnsStr);
}
NSArray * DNSDomainToDomainPath(NSString * domain)
{
int labels = 0, depth = 0;
char text[64];
const char * domainStr = domain.UTF8String;
const char *label[128];
NSString * undottedStr;
NSMutableArray *a = [NSMutableArray array];
while (*domainStr)
{
label[labels] = domainStr;
domainStr = GetNextLabel(domainStr, text);
undottedStr = [[NSString stringWithUTF8String: label[labels]]
stringByTrimmingCharactersInSet: [NSCharacterSet punctuationCharacterSet]];
if (!*domainStr || _CFHostIsDomainTopLevel((__bridge CFStringRef)undottedStr))
{
if (labels)
{
labels--; // If not first level then back up one level
undottedStr = [[NSString stringWithUTF8String: label[labels]]
stringByTrimmingCharactersInSet: [NSCharacterSet punctuationCharacterSet]];
}
[a addObject: undottedStr];
break;
}
labels++;
}
// Process the remainder of the hierarchy
for (depth = 0 ; depth < labels ; depth++)
{
GetNextLabel(label[labels-1-depth], text);
[a addObject: [NSString stringWithUTF8String: text]];
}
return(a);
}
NSString * TrimCharactersFromDNSDomain(NSString * domain)
{
NSMutableCharacterSet * trimSet = [NSMutableCharacterSet whitespaceCharacterSet];
[trimSet formUnionWithCharacterSet:[NSCharacterSet punctuationCharacterSet]];
return([domain stringByTrimmingCharactersInSet:trimSet]);
}
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