1dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt/* -*- Mode: C; tab-width: 4 -*- 2dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * 3dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * Copyright (c) 2008 Apple Inc. All rights reserved. 4dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * 5dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. 6dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * ("Apple") in consideration of your agreement to the following terms, and your 7dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * use, installation, modification or redistribution of this Apple software 8dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * constitutes acceptance of these terms. If you do not agree with these terms, 9dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * please do not use, install, modify or redistribute this Apple software. 10dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * 11dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * In consideration of your agreement to abide by the following terms, and subject 12dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * to these terms, Apple grants you a personal, non-exclusive license, under Apple's 13dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * copyrights in this original Apple software (the "Apple Software"), to use, 14dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * reproduce, modify and redistribute the Apple Software, with or without 15dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * modifications, in source and/or binary forms; provided that if you redistribute 16dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * the Apple Software in its entirety and without modifications, you must retain 17dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * this notice and the following text and disclaimers in all such redistributions of 18dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * the Apple Software. Neither the name, trademarks, service marks or logos of 19dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * Apple Computer, Inc. may be used to endorse or promote products derived from the 20dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * Apple Software without specific prior written permission from Apple. Except as 21dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * expressly stated in this notice, no other rights or licenses, express or implied, 22dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * are granted by Apple herein, including but not limited to any patent rights that 23dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * may be infringed by your derivative works or by other works in which the Apple 24dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * Software may be incorporated. 25dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * 26dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO 27dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED 28dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN 30dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * COMBINATION WITH YOUR PRODUCTS. 31dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * 32dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR 33dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 34dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION 36dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT 37dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN 38dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt */ 40dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt 41dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt#include <ctype.h> 42dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt#include <stdio.h> // For stdout, stderr 43dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt 44dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt#include "ClientCommon.h" 45dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt 46dd52342e088715929196886494c5055f9186d5c3Robert Greenwaltconst char *GetNextLabel(const char *cstr, char label[64]) 47dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt { 48dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt char *ptr = label; 49dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt while (*cstr && *cstr != '.') // While we have characters in the label... 50dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt { 51dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt char c = *cstr++; 52dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt if (c == '\\' && *cstr) // If we have a backslash, and it's not the last character of the string 53dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt { 54dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt c = *cstr++; 55dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt if (isdigit(cstr[-1]) && isdigit(cstr[0]) && isdigit(cstr[1])) 56dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt { 57dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt int v0 = cstr[-1] - '0'; // then interpret as three-digit decimal 58dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt int v1 = cstr[ 0] - '0'; 59dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt int v2 = cstr[ 1] - '0'; 60dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt int val = v0 * 100 + v1 * 10 + v2; 61dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt // If valid three-digit decimal value, use it 62dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt // Note that although ascii nuls are possible in DNS labels 63dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt // we're building a C string here so we have no way to represent that 64dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt if (val == 0) val = '-'; 65dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt if (val <= 255) { c = (char)val; cstr += 2; } 66dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt } 67dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt } 68dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt *ptr++ = c; 69dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt if (ptr >= label+64) { label[63] = 0; return(NULL); } // Illegal label more than 63 bytes 70dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt } 71dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt *ptr = 0; // Null-terminate label text 72dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt if (ptr == label) return(NULL); // Illegal empty label 73dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt if (*cstr) cstr++; // Skip over the trailing dot (if present) 74dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt return(cstr); 75dd52342e088715929196886494c5055f9186d5c3Robert Greenwalt } 76