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Diffstat (limited to 'include/VBox/usblib.h')
| -rw-r--r-- | include/VBox/usblib.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/include/VBox/usblib.h b/include/VBox/usblib.h new file mode 100644 index 00000000..2720d683 --- /dev/null +++ b/include/VBox/usblib.h @@ -0,0 +1,186 @@ +/** @file + * USBLib - Library for wrapping up the VBoxUSB functionality. (DEV,HDrv,Main) + */ + +/* + * Copyright (C) 2006-2019 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + +#ifndef VBOX_INCLUDED_usblib_h +#define VBOX_INCLUDED_usblib_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <VBox/cdefs.h> +#include <VBox/types.h> +#include <VBox/usb.h> +#include <VBox/usbfilter.h> +#include <iprt/ctype.h> +#include <iprt/string.h> + +#ifdef RT_OS_WINDOWS +# include <VBox/usblib-win.h> +#endif +#ifdef RT_OS_SOLARIS +# include <VBox/usblib-solaris.h> +#endif +#ifdef RT_OS_DARWIN +# include <VBox/usblib-darwin.h> +#endif +/** @todo merge the usblib-win.h interface into the darwin and linux ports where suitable. */ + +RT_C_DECLS_BEGIN +/** @defgroup grp_usblib USBLib - USB Support Library + * This module implements the basic low-level OS interfaces and common USB code. + * @{ + */ + +#ifdef IN_RING3 +/** + * Initializes the USBLib component. + * + * The USBLib keeps a per process connection to the kernel driver + * and all USBLib users within a process will share the same + * connection. USBLib does reference counting to make sure that + * the connection remains open until all users has called USBLibTerm(). + * + * @returns VBox status code. + * + * @remark The users within the process are responsible for not calling + * this function at the same time (because I'm lazy). + */ +USBLIB_DECL(int) USBLibInit(void); + +/** + * Terminates the USBLib component. + * + * Must match successful USBLibInit calls. + * + * @returns VBox status code. + */ +USBLIB_DECL(int) USBLibTerm(void); + +/** + * Adds a filter. + * + * This function will validate and transfer the specified filter + * to the kernel driver and make it start using it. The kernel + * driver will return a filter id that this function passes on + * to its caller. + * + * The kernel driver will associate the added filter with the + * calling process and automatically remove all filters when + * the process terminates the connection to it or dies. + * + * @returns Filter id for passing to USBLibRemoveFilter on success. + * @returns NULL on failure. + * + * @param pFilter The filter to add. + */ +USBLIB_DECL(void *) USBLibAddFilter(PCUSBFILTER pFilter); + +/** + * Removes a filter. + * + * @param pvId The ID returned by USBLibAddFilter. + */ +USBLIB_DECL(void) USBLibRemoveFilter(void *pvId); + +/** + * Calculate the hash of the serial string. + * + * 64bit FNV1a, chosen because it is designed to hash in to a power of two + * space, and is much quicker and simpler than, say, a half MD4. + * + * @returns the hash. + * @param pszSerial The serial string. + */ +USBLIB_DECL(uint64_t) USBLibHashSerial(const char *pszSerial); + +#endif /* IN_RING3 */ + +/** + * Purge string of non-UTF-8 encodings and control characters. + * + * Control characters creates problems when presented to the user and currently + * also when used in XML settings. So, we must purge them in the USB vendor, + * product, and serial number strings. + * + * @returns String length (excluding terminator). + * @param psz The string to purge. + * + * @remarks The return string may be shorter than the input, left over space + * after the end of the string will be filled with zeros. + */ +DECLINLINE(size_t) USBLibPurgeEncoding(char *psz) +{ + if (psz) + { + size_t offSrc; + + /* Beat it into valid UTF-8 encoding. */ + RTStrPurgeEncoding(psz); + + /* Look for control characters. */ + for (offSrc = 0; ; offSrc++) + { + char ch = psz[offSrc]; + if (RT_UNLIKELY(RT_C_IS_CNTRL(ch) && ch != '\0')) + { + /* Found a control character! Replace tab by space and remove all others. */ + size_t offDst = offSrc; + for (;; offSrc++) + { + ch = psz[offSrc]; + if (RT_C_IS_CNTRL(ch) && ch != '\0') + { + if (ch == '\t') + ch = ' '; + else + continue; + } + psz[offDst++] = ch; + if (ch == '\0') + break; + } + + /* Wind back to the zero terminator and zero fill any gap to make + USBFilterValidate happy. (offSrc is at zero terminator too.) */ + offDst--; + while (offSrc > offDst) + psz[offSrc--] = '\0'; + + return offDst; + } + if (ch == '\0') + break; + } + return offSrc; + } + return 0; +} + + +/** @} */ +RT_C_DECLS_END + +#endif /* !VBOX_INCLUDED_usblib_h */ + |