You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
76 lines
3.6 KiB
76 lines
3.6 KiB
/* -*- Mode: C; tab-width: 4 -*-
|
|
*
|
|
* Copyright (c) 2008 Apple Inc. All rights reserved.
|
|
*
|
|
* Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
|
|
* ("Apple") in consideration of your agreement to the following terms, and your
|
|
* use, installation, modification or redistribution of this Apple software
|
|
* constitutes acceptance of these terms. If you do not agree with these terms,
|
|
* please do not use, install, modify or redistribute this Apple software.
|
|
*
|
|
* In consideration of your agreement to abide by the following terms, and subject
|
|
* to these terms, Apple grants you a personal, non-exclusive license, under Apple's
|
|
* copyrights in this original Apple software (the "Apple Software"), to use,
|
|
* reproduce, modify and redistribute the Apple Software, with or without
|
|
* modifications, in source and/or binary forms; provided that if you redistribute
|
|
* the Apple Software in its entirety and without modifications, you must retain
|
|
* this notice and the following text and disclaimers in all such redistributions of
|
|
* the Apple Software. Neither the name, trademarks, service marks or logos of
|
|
* Apple Computer, Inc. may be used to endorse or promote products derived from the
|
|
* Apple Software without specific prior written permission from Apple. Except as
|
|
* expressly stated in this notice, no other rights or licenses, express or implied,
|
|
* are granted by Apple herein, including but not limited to any patent rights that
|
|
* may be infringed by your derivative works or by other works in which the Apple
|
|
* Software may be incorporated.
|
|
*
|
|
* The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
|
|
* WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
|
|
* WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
|
|
* COMBINATION WITH YOUR PRODUCTS.
|
|
*
|
|
* IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
|
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
|
|
* OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
|
|
* (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <ctype.h>
|
|
#include <stdio.h> // For stdout, stderr
|
|
|
|
#include "ClientCommon.h"
|
|
|
|
const char *GetNextLabel(const char *cstr, char label[64])
|
|
{
|
|
char *ptr = label;
|
|
while (*cstr && *cstr != '.') // While we have characters in the label...
|
|
{
|
|
char c = *cstr++;
|
|
if (c == '\\' && *cstr) // If we have a backslash, and it's not the last character of the string
|
|
{
|
|
c = *cstr++;
|
|
if (isdigit(cstr[-1]) && isdigit(cstr[0]) && isdigit(cstr[1]))
|
|
{
|
|
int v0 = cstr[-1] - '0'; // then interpret as three-digit decimal
|
|
int v1 = cstr[ 0] - '0';
|
|
int v2 = cstr[ 1] - '0';
|
|
int val = v0 * 100 + v1 * 10 + v2;
|
|
// If valid three-digit decimal value, use it
|
|
// Note that although ascii nuls are possible in DNS labels
|
|
// we're building a C string here so we have no way to represent that
|
|
if (val == 0) val = '-';
|
|
if (val <= 255) { c = (char)val; cstr += 2; }
|
|
}
|
|
}
|
|
*ptr++ = c;
|
|
if (ptr >= label+64) { label[63] = 0; return(NULL); } // Illegal label more than 63 bytes
|
|
}
|
|
*ptr = 0; // Null-terminate label text
|
|
if (ptr == label) return(NULL); // Illegal empty label
|
|
if (*cstr) cstr++; // Skip over the trailing dot (if present)
|
|
return(cstr);
|
|
}
|