usr.lib/mdnsd/DNSCommon.c

666 mDNSexport mDNSu8 *AppendLiteralLabelString(domainname *const name, const char *cstr)
674 	while (*cstr && ptr < lim) *ptr++ = (mDNSu8)*cstr++;	// Copy the data
677 	if (*cstr) return(mDNSNULL);							// Failure: We didn't successfully consume all input
690 	const char   *cstr      = cstring;
693 	while (*cstr && ptr < lim)										// While more characters, and space to put them...
696 		if (*cstr == '.') { LogMsg("AppendDNSNameString: Illegal empty label in name \"%s\"", cstring); return(mDNSNULL); }
697 		while (*cstr && *cstr != '.' && ptr < lim)					// While we have characters in the label...
699 			mDNSu8 c = (mDNSu8)*cstr++;								// Read the character
702 				c = (mDNSu8)*cstr++;								// Assume we'll just take the next character
703 				if (mdnsIsDigit(cstr[-1]) && mdnsIsDigit(cstr[0]) && mdnsIsDigit(cstr[1]))
705 					int v0 = cstr[-1] - '0';						// then interpret as three-digit decimal
706 					int v1 = cstr[ 0] - '0';
707 					int v2 = cstr[ 1] - '0';
709 					if (val <= 255) { c = (mDNSu8)val; cstr += 2; }	// If valid three-digit decimal value, use it
714 		if (*cstr) cstr++;											// Skip over the trailing dot (if present)
721 	if (*cstr) return(mDNSNULL);									// Failure: We didn't successfully consume all input
768 mDNSexport mDNSBool MakeDomainLabelFromLiteralString(domainlabel *const label, const char *cstr)
772 	while (*cstr && ptr < limit) *ptr++ = (mDNSu8)*cstr++;			// Copy the label
774 	return(*cstr == 0);												// Return mDNStrue if we successfully consumed all input
784 mDNSexport mDNSu8 *MakeDomainNameFromDNSNameString(domainname *const name, const char *cstr)
787 	return(AppendDNSNameString(name, cstr));		// And then add this string to it
817 // Note: To guarantee that there will be no possible overrun, cstr must be at least MAX_ESCAPED_DOMAIN_NAME (1005 bytes)