diff options
Diffstat (limited to 'src/VBox/Runtime/common/net/netaddrstr.cpp')
| -rw-r--r-- | src/VBox/Runtime/common/net/netaddrstr.cpp | 1233 |
1 files changed, 1233 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/net/netaddrstr.cpp b/src/VBox/Runtime/common/net/netaddrstr.cpp new file mode 100644 index 00000000..160c8aaf --- /dev/null +++ b/src/VBox/Runtime/common/net/netaddrstr.cpp @@ -0,0 +1,1233 @@ +/* $Id: netaddrstr.cpp $ */ +/** @file + * IPRT - Network Address String Handling. + * + * @remarks Don't add new functionality to this file, it goes into netaddrstr2.cpp + * or some other suitable file (legal reasons + code not up to oracle + * quality standards and requires rewrite from scratch). + */ + +/* + * Contributed by Oliver Loch. + * + * Copyright (C) 2012-2023 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox 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. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include "internal/iprt.h" +#include <iprt/net.h> + +#include <iprt/mem.h> +#include <iprt/string.h> +#include <iprt/stream.h> +#include "internal/string.h" + + +/** @page pg_rtnetipv6_addr IPv6 Address Format + * + * IPv6 Addresses, their representation in text and other problems. + * + * The following is based on: + * + * - http://tools.ietf.org/html/rfc4291 + * - http://tools.ietf.org/html/rfc5952 + * - http://tools.ietf.org/html/rfc6052 + * + * + * Before you start using those functions, you should have an idea of + * what you're dealing with, before you come and blame the functions... + * + * First of all, the address itself: + * + * An address is written like this: (READ THIS FINE MANUAL!) + * + * - 2001:db8:abc:def::1 + * + * The characters between two colons are called a "hextet". + * Each hextet consists of four characters and each IPv6 address + * consists of a maximum of eight hextets. So a full blown address + * would look like this: + * + * - 1111:2222:3333:4444:5555:6666:7777:8888 + * + * The allowed characters are "0123456789abcdef". They have to be + * lower case. Upper case is not allowed. + * + * *** Gaps and adress shortening + * + * If an address contains hextets that contain only "0"s, they + * can be shortened, like this: + * + * - 1111:2222:0000:0000:0000:0000:7777:8888 -> 1111:2222::7777:8888 + * + * The double colon represents the hextets that have been shortened "::". + * The "::" will be called "gap" from now on. + * + * When shortening an address, there are some special rules that need to be applied: + * + * - Shorten always the longest group of hextets. + * + * Let's say, you have this address: 2001:db8:0:0:0:1:0:0 then it has to be + * shortened to "2001:db8::1:0:0". Shortening to "2001:db8:0:0:0:1::" would + * return an error. + * + * - Two or more gaps the same size. + * + * Let's say you have this address: 2001:db8:0:0:1:0:0:1. As you can see, there + * are two gaps, both the size of two hextets. If you shorten the last two hextets, + * you end up in pain, as the RFC forbids this, so the correct address is: + * "2001:db8::1:0:0:1" + * + * It's important to note that an address can only be shortened ONE TIME! + * This is invalid: "2001:db8::1::1" + * + * *** The scope. + * + * Each address has a so called "scope" it is added to the end of the address, + * separated by a percent sign "%". If there is no scope at the end, it defaults + * to "0". + * + * So "2001:db8::1" is the same as "2001:db8::1%0". + * + * As in IPv6 all network interfaces can/should have the same address, the scope + * gives you the ability to choose on which interface the system should listen. + * + * AFAIK, the scope can be used with unicast as well as link local addresses, but + * it is mandatory with link local addresses (starting with fe80::). + * + * On Linux the default scope is the interface's name. On Windows it's just the index + * of the interface. Run "route print -6" in the shell, to see the interface's index + * on Winodows. + * + * All functions can deal with the scope, and DO NOT warn if you put garbage there. + * + * *** Port added to the IPv6 address + * + * There is only one way to add a port to an IPv6 address is to embed it in brackets: + * + * [2001:db8::1]:12345 + * + * This gives you the address "2001:db8::1" and the port "12345". + * + * What also works, but is not recommended by rfc is to separate the port + * by a dot: + * + * 2001:db8::1.12345 + * + * It even works with embedded IPv4 addresses. + * + * *** Special addresses and how they are written + * + * The following are notations to represent "special addresses". + * + * "::" IN6ADDR_ANY + * ":::123" IN6ADDR_ANY with port "123" + * "[::]:123" IN6ADDR_ANY with port "123" + * "[:::123]" -> NO. Not allowed and makes no sense + * "::1" -> address of the loopback device (127.0.0.1 in v4) + * + * On systems with dual sockets, one can use so called embedded IPv4 addresses: + * + * "::ffff:192.168.1.1" results in the IPv6 address "::ffff:c0a8:0101" as two octets + * of the IPv4 address will be converted to one hextet in the IPv6 address. + * + * The prefix of such addresses MUST BE "::ffff:", 10 bytes as zero and two bytes as 255. + * + * The so called IPv4-compatible IPv6 addresses are deprecated and no longer in use. + * + * *** Valid addresses and string + * + * If you use any of the IPv6 address functions, keep in mind, that those addresses + * are all returning "valid" even if the underlying system (e.g. VNC) doesn't like + * such strings. + * + * [2001:db8::1] + * [2001:db8::1]:12345 + * + * and so on. So to make sure you only pass the underlying software a pure IPv6 address + * without any garbage, you should use the "outAddress" parameters to get a RFC compliant + * address returned. + * + * So after reading the above, you'll start using the functions and see a bool called + * "followRfc" which is true by default. This is what this bool does: + * + * The following addresses all represent the exact same address: + * + * 1 - 2001:db8::1 + * 2 - 2001:db8:0::1 + * 3 - 2001:0db8:0000:0000:0000:0000:0000:0001 + * 4 - 2001:DB8::1 + * 5 - [2001:db8::1] + * 6 - [2001:db8:0::1] + * + * According to RFC 5952, number two, three, four and six are invalid. + * + * #2 - because there is a single hextet that hasn't been shortened + * + * #3 - because there has nothing been shortened (hextets 3 to 7) and + * there are leading zeros in at least one hextet ("0db8") + * + * #4 - all characters in an IPv6 address have to be lower case + * + * #6 - same as two but included in brackets + * + * If you follow RFC, the above addresses are not converted and an + * error is returned. If you turn RFC off, you will get the expected + * representation of the address. + * + * It's a nice way to convert "weird" addresses to rfc compliant addresses + * + */ + + +/** + * Parses any string and tests if it is an IPv6 Address + * + * This function should NOT be used directly. If you do, note + * that no security checks are done at the moment. This can change. + * + * @returns iprt sstatus code, yeah, right... This function most certainly DOES + * NOT RETURN ANY IPRT STATUS CODES. It's also a unreadable mess. + * @param pszAddress The strin that holds the IPv6 address + * @param addressLength The length of pszAddress + * @param pszAddressOut Returns a plain, full blown IPv6 address + * as a char array + * @param addressOutSize The size of pszAddressOut (length) + * @param pPortOut 32 bit unsigned integer, holding the port + * If pszAddress doesn't contain a port, it's 0 + * @param pszScopeOut Returns the scope of the address, if none it's 0 + * @param scopeOutSize sizeof(pszScopeOut) + * @param pBrackets returns true if the address was enclosed in brackets + * @param pEmbeddedV4 returns true if the address is an embedded IPv4 address + * @param followRfc if set to true, the function follows RFC (default) + */ +static int rtStrParseAddrStr6(const char *pszAddress, size_t addressLength, char *pszAddressOut, size_t addressOutSize, uint32_t *pPortOut, char *pszIfIdOut, size_t ifIdOutSize, bool *pBrackets, bool *pEmbeddedV4, bool followRfc) +{ + /************************\ + * Pointer Hell Ahead * + \************************/ + + const char szIpV6AddressChars[] = "ABCDEF01234567890abcdef.:[]%"; // order IMPORTANT + const char szIpV4AddressChars[] = "01234567890.:[]"; // order IMPORTANT + const char szLinkLocalPrefix[] = "FfEe8800"; // + const char *pszIpV6AddressChars = NULL, *pszIpV4AddressChars = NULL, *pszLinkLocalPrefix = NULL; + + char *pszSourceAddress = NULL, *pszSourceAddressStart = NULL; + char *pszResultAddress = NULL, *pszResultAddressStart = NULL; + char *pszResultAddress4 = NULL, *pszResultAddress4Start = NULL; + char *pszResultPort = NULL, *pszResultPortStart = NULL; + char *pszInternalAddress = NULL, *pszInternalAddressStart = NULL; + char *pszInternalPort = NULL, *pszInternalPortStart = NULL; + + char *pStart = NULL, *pNow = NULL, *pNext = NULL, *pNowChar = NULL, *pIfId = NULL, *pIfIdEnd = NULL; + char *pNowDigit = NULL, *pFrom = NULL, *pTo = NULL, *pLast = NULL; + char *pGap = NULL, *pMisc = NULL, *pDotStart = NULL, *pFieldStart = NULL, *pFieldEnd = NULL; + char *pFieldStartLongest = NULL, *pBracketOpen = NULL, *pBracketClose = NULL; + char *pszRc = NULL; + + bool isLinkLocal = false; + char szDummy[4]; + + uint8_t *pByte = NULL; + uint32_t byteOut = 0; + uint16_t returnValue = 0; + uint32_t colons = 0; + uint32_t colonsOverAll = 0; + uint32_t fieldLength = 0; + uint32_t dots = 0; + size_t gapSize = 0; + uint32_t intPortOut = 0; + + pszIpV4AddressChars = &szIpV4AddressChars[0]; + pszIpV6AddressChars = &szIpV6AddressChars[6]; + pszLinkLocalPrefix = &szLinkLocalPrefix[6]; + + if (!followRfc) + pszIpV6AddressChars = &szIpV6AddressChars[0]; + + if (addressLength<2) + returnValue = 711; + + pszResultAddressStart = (char *)RTMemTmpAlloc(34); + pszInternalAddressStart = (char *)RTMemTmpAlloc(34); + pszInternalPortStart = (char * )RTMemTmpAlloc(10); + + if (! (pszResultAddressStart && pszInternalAddressStart && pszInternalPortStart)) + { + if (pszResultAddressStart) + RTMemTmpFree(pszResultAddressStart); + + if (pszInternalAddressStart) + RTMemTmpFree(pszInternalAddressStart); + + if (pszInternalPortStart) + RTMemTmpFree(pszInternalPortStart); + + return -701; + } + + memset(szDummy, '\0', 4); + + pszResultAddress = pszResultAddressStart; + memset(pszResultAddressStart, '\0', 34); + + pszInternalAddress = pszInternalAddressStart; + memset(pszInternalAddressStart, '\0' , 34); + + pszInternalPort = pszInternalPortStart; + memset(pszInternalPortStart, '\0', 10); + + pszSourceAddress = pszSourceAddressStart = (char *)pszAddress; + + pFrom = pTo = pStart = pLast = pszSourceAddressStart; + + while (*pszSourceAddress != '\0' && !returnValue) + { + pNow = NULL; + pNext = NULL; + pNowChar = NULL; + pNowDigit = NULL; + + pNow = pszSourceAddress; + pNext = pszSourceAddress + 1; + + if (!pFrom) + pFrom = pTo = pNow; + + pNowChar = (char *)memchr(pszIpV6AddressChars, *pNow, strlen(pszIpV6AddressChars)); + pNowDigit = (char *)memchr(pszIpV6AddressChars, *pNow, strlen(pszIpV6AddressChars) - 5); + + if (pszResultPort) + { + if (pLast && (pszResultPort == pszSourceAddressStart)) + { + if (*pLast == '\0') + returnValue = 721; + + pszResultPortStart = (char *)RTMemTmpAlloc(10); + + if (!pszResultPortStart) + returnValue = 702; + + memset(pszResultPortStart, '\0', 10); + pszResultPort = pszResultPortStart; + pszSourceAddress = pLast; + pMisc = pLast; + pLast = NULL; + continue; + } + + pNowDigit = NULL; + pNowDigit = (char *)memchr(pszIpV4AddressChars, *pNow, strlen(pszIpV4AddressChars) - 4); + + if (strlen(pszResultPortStart) == 5) + returnValue = 11; + + if (*pNow == '0' && pszResultPort == pszResultPortStart && *pNext != '\0' && (pNow - pMisc) < 5 ) + { + pszSourceAddress++; + continue; + } + + if (pNowDigit) + { + *pszResultPort = *pNowDigit; + pszResultPort++; + pszSourceAddress++; + continue; + } + else + returnValue = 12; + } + + if (pszResultAddress4) + { + if (pszResultAddress4 == pszSourceAddressStart && pLast) + { + dots = 0; + pszResultAddress4 = NULL; + pszResultAddress4Start = NULL; + pszResultAddress4Start = (char *)RTMemTmpAlloc(20); + + if (!pszResultAddress4Start) + { + returnValue = 401; + break; + } + + memset(pszResultAddress4Start, '\0', 20); + pszResultAddress4 = pszResultAddress4Start; + pszSourceAddress = pLast; + pFrom = pLast; + pTo = pLast; + pLast = NULL; + continue; + } + + pTo = pNow; + pNowDigit = NULL; + pNowDigit = (char *)memchr(pszIpV4AddressChars, *pNow, strlen(pszIpV4AddressChars) - 4); + + if (!pNowDigit && *pNow != '.' && *pNow != ']' && *pNow != ':' && *pNow != '%') + returnValue = 412; + + if ((pNow - pFrom) > 3) + { + returnValue = 402; + break; + } + + if (pNowDigit && *pNext != '\0') + { + pszSourceAddress++; + continue; + } + + if (!pNowDigit && !pBracketOpen && (*pNext == '.' || *pNext == ']' || *pNext == ':')) + returnValue = 411; + + memset(pszResultAddress4, '0', 3); + pMisc = pszResultAddress4 + 2; + pszResultAddress4 = pszResultAddress4 + 3; + + if (*pNow != '.' && !pNowDigit && strlen(pszResultAddress4Start) < 9) + returnValue = 403; + + if ((pTo - pFrom) > 0) + pTo--; + + dots++; + + while (pTo >= pFrom) + { + *pMisc = *pTo; + pMisc--; + pTo--; + } + + if (dots == 4 && *pNow == '.') + { + if (!pBracketOpen) + { + pszResultPort = pszSourceAddressStart; + pLast = pNext; + } + else + { + returnValue = 409; + } + } + + dots = 0; + + pFrom = pNext; + pTo = pNext; + + if (strlen(pszResultAddress4Start) > 11) + pszResultAddress4 = NULL; + + if ((*pNow == ':' || *pNow == '.') && strlen(pszResultAddress4Start) == 12) + { + pLast = pNext; + pszResultPort = pszSourceAddressStart; + } + + if (*pNow == '%') + { + pIfId = pNow; + pLast = pNow; + continue; + } + pszSourceAddress = pNext; + + if (*pNow != ']') + continue; + + pFrom = pNow; + pTo = pNow; + } + + if (pIfId && (!pIfIdEnd)) + { + if (*pIfId == '%' && pIfId == pLast && *pNext != '\0') + { + pFrom = pNext; + pIfId = pNext; + pLast = NULL; + + pszSourceAddress++; + continue; + } + + if (*pNow == '%' && pIfId <= pNow) + { + returnValue = 442; + break; + } + + if (*pNow != ']' && *pNext != '\0') + { + pTo = pNow; + pszSourceAddress++; + continue; + } + + if (*pNow == ']') + { + pIfIdEnd = pNow - 1; + pFrom = pNow; + pTo = pNow; + continue; + } + else + { + pIfIdEnd = pNow; + pFrom = NULL; + pTo = NULL; + pszSourceAddress++; + continue; + } + } + + if (!pNowChar) + { + returnValue = 254; + + if (followRfc) + { + pMisc = (char *)memchr(&szIpV6AddressChars[0], *pNow, strlen(&szIpV6AddressChars[0])); + + if (pMisc) + returnValue = 253; + } + } + + if (strlen(pszResultAddressStart) > 32 && !pszResultAddress4Start) + returnValue = 255; + + if (pNowDigit && *pNext != '\0' && colons == 0) + { + pTo = pNow; + pszSourceAddress++; + continue; + } + + if (*pNow == ':' && *pNext != '\0') + { + colonsOverAll++; + colons++; + pszSourceAddress++; + continue; + } + + if (*pNow == ':' ) + { + colons++; + colonsOverAll++; + } + + if (*pNow == '.') + { + pMisc = pNow; + + while (*pMisc != '\0' && *pMisc != ']') + { + if (*pMisc == '.') + dots++; + + pMisc++; + } + } + + if (*pNow == ']') + { + if (pBracketClose) + returnValue = 77; + + if (!pBracketOpen) + returnValue = 22; + + if (*pNext == ':' || *pNext == '.') + { + pszResultPort = pszSourceAddressStart; + pLast = pNext + 1; + } + + if (pFrom == pNow) + pFrom = NULL; + + pBracketClose = pNow; + } + + if (*pNow == '[') + { + if (pBracketOpen) + returnValue = 23; + + if (pStart != pNow) + returnValue = 24; + + pBracketOpen = pNow; + pStart++; + pFrom++; + pszSourceAddress++; + continue; + } + + if (*pNow == '%') + { + if (pIfId) + returnValue = 441; + + pLast = pNext; + pIfId = pNext; + } + + if (colons > 0) + { + if (colons == 1) + { + if (pStart + 1 == pNow ) + returnValue = 31; + + if (*pNext == '\0' && !pNowDigit) + returnValue = 32; + + pLast = pNow; + } + + if (colons == 2) + { + if (pGap) + returnValue = 33; + + pGap = pszResultAddress + 4; + + if (pStart + 1 == pNow || pStart + 2 == pNow) + { + pGap = pszResultAddressStart; + pFrom = pNow; + } + + if (*pNext == '\0' && !pNowDigit) + pszSourceAddress++; + + if (*pNext != ':' && *pNext != '.') + pLast = pNow; + } + + if (colons == 3) + { + pFrom = pLast; + pLast = pNow; + + if (*pNext == '\0' && !pNowDigit) + returnValue = 34; + + if (pBracketOpen) + returnValue = 35; + + if (pGap && followRfc) + returnValue = 36; + + if (!pGap) + pGap = pszResultAddress + 4; + + if (pStart + 3 == pNow) + { + pszResultPort = pszSourceAddressStart; + pGap = pszResultAddress; + pFrom = NULL; + } + + if (pNowDigit) + { + pszResultPort = pszSourceAddressStart; + } + } + } + if (*pNext == '\0' && colons == 0 && !pIfIdEnd) + { + pFrom = pLast; + + if (pNowDigit) + pTo = pNow; + + pLast = NULL; + } + + if (dots > 0) + { + if (dots == 1) + { + pszResultPort = pszSourceAddressStart; + pLast = pNext; + } + + if (dots == 4 && pBracketOpen) + returnValue = 601; + + if (dots == 3 || dots == 4) + { + pszResultAddress4 = pszSourceAddressStart; + pLast = pFrom; + pFrom = NULL; + } + + if (dots > 4) + returnValue = 603; + + dots = 0; + } + + if (pFrom && pTo) + { + if (pTo - pFrom > 3) + { + returnValue = 51; + break; + } + + if (followRfc) + { + if ((pTo - pFrom > 0) && *pFrom == '0') + returnValue = 101; + + if ((pTo - pFrom) == 0 && *pFrom == '0' && colons == 2) + returnValue = 102; + + if ((pTo - pFrom) == 0 && *pFrom == '0' && pszResultAddress == pGap) + returnValue = 103; + + if ((pTo - pFrom) == 0 && *pFrom == '0') + { + if (!pFieldStart) + { + pFieldStart = pszResultAddress; + pFieldEnd = pszResultAddress + 4; + } + else + { + pFieldEnd = pFieldEnd + 4; + } + } + else + { + if ((size_t)(pFieldEnd - pFieldStart) > fieldLength) + { + fieldLength = pFieldEnd - pFieldStart; + pFieldStartLongest = pFieldStart; + } + + pFieldStart = NULL; + pFieldEnd = NULL; + } + } + if (!(pGap == pszResultAddressStart && (size_t)(pNow - pStart) == colons)) + { + memset(pszResultAddress, '0', 4); + pMisc = pszResultAddress + 3; + pszResultAddress = pszResultAddress + 4; + + if (pFrom == pStart && (pTo - pFrom) == 3) + { + isLinkLocal = true; + + while (pTo >= pFrom) + { + *pMisc = *pTo; + + if (*pTo != *pszLinkLocalPrefix && *pTo != *(pszLinkLocalPrefix + 1)) + isLinkLocal = false; + + pTo--; + pMisc--; + pszLinkLocalPrefix = pszLinkLocalPrefix - 2; + } + } + else + { + while (pTo >= pFrom) + { + *pMisc = *pTo; + pMisc--; + pTo--; + } + } + } + + pFrom = pNow; + pTo = pNow; + + } + if (*pNext == '\0' && colons == 0) + pszSourceAddress++; + + if (*pNext == '\0' && !pBracketClose && !pszResultPort) + pTo = pNext; + + colons = 0; + } // end of loop + + if (!returnValue && colonsOverAll < 2) + returnValue = 252; + + if (!returnValue && (pBracketOpen && !pBracketClose)) + returnValue = 25; + + if (!returnValue && pGap) + { + gapSize = 32 - strlen(pszResultAddressStart); + + if (followRfc) + { + if (gapSize < 5) + returnValue = 104; + + if (fieldLength > gapSize) + returnValue = 105; + + if (fieldLength == gapSize && pFieldStartLongest < pGap) + returnValue = 106; + } + + pszResultAddress = pszResultAddressStart; + pszInternalAddress = pszInternalAddressStart; + + if (!returnValue && pszResultAddress4Start) + { + if (strlen(pszResultAddressStart) > 4) + returnValue = 405; + + pszResultAddress = pszResultAddressStart; + + if (pGap != pszResultAddressStart) + returnValue = 407; + + memset(pszInternalAddressStart, '0', 20); + pszInternalAddress = pszInternalAddressStart + 20; + + for (int i = 0; i < 4; i++) + { + if (*pszResultAddress != 'f' && *pszResultAddress != 'F') + { + returnValue = 406; + break; + } + + *pszInternalAddress = *pszResultAddress; + pszResultAddress++; + pszInternalAddress++; + } + pszResultAddress4 = pszResultAddress4Start; + + for (int i = 0; i<4; i++) + { + memcpy(szDummy, pszResultAddress4, 3); + + int rc = RTStrToUInt32Ex((const char *)&szDummy[0], NULL, 16, &byteOut); + + if (rc == 0 && byteOut < 256) + { + RTStrPrintf(szDummy, 3, "%02x", byteOut); + memcpy(pszInternalAddress, szDummy, 2); + pszInternalAddress = pszInternalAddress + 2; + pszResultAddress4 = pszResultAddress4 + 3; + memset(szDummy, '\0', 4); + } + else + { + returnValue = 499; + } + } + } + else + { + while (!returnValue && pszResultAddress != pGap) + { + *pszInternalAddress = *pszResultAddress; + pszResultAddress++; + pszInternalAddress++; + } + + memset(pszInternalAddress, '0', gapSize); + pszInternalAddress = pszInternalAddress + gapSize; + + while (!returnValue && *pszResultAddress != '\0') + { + *pszInternalAddress = *pszResultAddress; + pszResultAddress++; + pszInternalAddress++; + } + } + } + else + { + if (!returnValue) + { + if (strlen(pszResultAddressStart) != 32) + returnValue = 111; + + if (followRfc) + { + if (fieldLength > 4) + returnValue = 112; + } + + memcpy(pszInternalAddressStart, pszResultAddressStart, strlen(pszResultAddressStart)); + } + } + + if (pszResultPortStart) + { + if (strlen(pszResultPortStart) > 0 && strlen(pszResultPortStart) < 6) + { + memcpy(pszInternalPortStart, pszResultPortStart, strlen(pszResultPortStart)); + + intPortOut = 0; + int rc = RTStrToUInt32Ex(pszInternalPortStart, NULL, 10, &intPortOut); + + if (rc == 0) + { + if (!(intPortOut > 0 && intPortOut < 65536)) + intPortOut = 0; + } + else + { + returnValue = 888; + } + } + else + { + returnValue = 889; + } + } + + /* + full blown address 32 bytes, no colons -> pszInternalAddressStart + port as string -> pszResultPortStart + port as binary integer -> intPortOut + interface id in pIfId and pIfIdEnd + + Now fill the out parameters. + + */ + + if (!returnValue && pszAddressOut) + { + if (strlen(pszInternalAddressStart) < addressOutSize) + { + pszRc = NULL; + pszRc = (char *)memset(pszAddressOut, '\0', addressOutSize); + + if (!pszRc) + returnValue = 910; + + pszRc = NULL; + + pszRc = (char *)memcpy(pszAddressOut, pszInternalAddressStart, strlen(pszInternalAddressStart)); + + if (!pszRc) + returnValue = 911; + } + else + { + returnValue = 912; + } + } + + if (!returnValue && pPortOut) + { + *pPortOut = intPortOut; + } + + if (!returnValue && pszIfIdOut) + { + if (pIfIdEnd && pIfId) + { + if ((size_t)(pIfIdEnd - pIfId) + 1 < ifIdOutSize) + { + pszRc = NULL; + pszRc = (char *)memset(pszIfIdOut, '\0', ifIdOutSize); + + if (!pszRc) + returnValue = 913; + + pszRc = NULL; + pszRc = (char *)memcpy(pszIfIdOut, pIfId, (pIfIdEnd - pIfId) + 1); + + if (!pszRc) + returnValue = 914; + } + else + { + returnValue = 915; + } + } + else + { + pszRc = NULL; + pszRc = (char *)memset(pszIfIdOut, '\0', ifIdOutSize); + + if (!pszRc) + returnValue = 916; + } + // temporary hack + if (isLinkLocal && (strlen(pszIfIdOut) < 1)) + { + memset(pszIfIdOut, '\0', ifIdOutSize); + *pszIfIdOut = '%'; + pszIfIdOut++; + *pszIfIdOut = '0'; + pszIfIdOut++; + } + } + + if (pBracketOpen && pBracketClose && pBrackets) + *pBrackets = true; + + if (pEmbeddedV4 && pszResultAddress4Start) + *pEmbeddedV4 = true; + + if (pszResultAddressStart) + RTMemTmpFree(pszResultAddressStart); + + if (pszResultPortStart) + RTMemTmpFree(pszResultPortStart); + + if (pszResultAddress4Start) + RTMemTmpFree(pszResultAddress4Start); + + if (pszInternalAddressStart) + RTMemTmpFree(pszInternalAddressStart); + + if (pszInternalPortStart) + RTMemTmpFree(pszInternalPortStart); + + return (uint32_t)(returnValue - (returnValue * 2)); // make it negative... +} + +/** + * Takes a string and returns a RFC compliant string of the address + * This function SHOULD NOT be used directly. It expects a 33 byte + * char array with a full blown IPv6 address without separators. + * + * @returns iprt status code. + * @param psz The string to convert + * @param pszAddrOut The char[] that will hold the result + * @param addOutSize The size of the char[] from above. + * @param pszPortOut char[] for the text representation of the port + * @param portOutSize sizeof(pszPortOut); + */ +DECLHIDDEN(int) rtStrToIpAddr6Str(const char *psz, char *pszAddrOut, size_t addrOutSize, char *pszPortOut, size_t portOutSize, bool followRfc) +{ + char *pStart = NULL; + char *pGapStart = NULL; + char *pGapEnd = NULL; + char *pGapTStart = NULL; + char *pGapTEnd = NULL; + char *pCurrent = NULL; + char *pOut = NULL; + + if (!psz || !pszAddrOut) + return VERR_NOT_SUPPORTED; + + if (addrOutSize < 40) + return VERR_NOT_SUPPORTED; + + pStart = (char *)psz; + pCurrent = (char *)psz; + pGapStart = (char *)psz; + pGapEnd = (char *)psz; + + while (*pCurrent != '\0') + { + if (*pCurrent != '0') + pGapTStart = NULL; + + if ((pCurrent - pStart) % 4 == 0) // ok, start of a hextet + { + if (*pCurrent == '0' && !pGapTStart) + pGapTStart = pCurrent; + } + + if ((pCurrent - pStart) % 4 == 3) + { + if (*pCurrent == '0' && pGapTStart) + pGapTEnd = pCurrent; + + if (pGapTStart && pGapTEnd) + { + pGapTEnd = pCurrent; + + if ((pGapTEnd - pGapTStart) > (pGapEnd - pGapStart)) + { + pGapEnd = pGapTEnd; + pGapStart = pGapTStart; + } + } + } + + pCurrent++; + } + + pCurrent = (char *)psz; + pStart = (char *)psz; + pOut = (char *)pszAddrOut; + + while (*pCurrent != '\0') + { + if (*pCurrent != '0') + pGapTStart = NULL; + + if (!pGapTStart) + { + *pOut = *pCurrent; + pOut++; + } + + if ((pCurrent - pStart) % 4 == 3) + { + if (pGapTStart && *pCurrent == '0') + { + *pOut = *pCurrent; + pOut++; + } + + if (*(pCurrent + 1) != '\0') + { + *pOut = ':'; + pOut++; + } + + pGapTStart = pCurrent + 1; + } + + if ((pCurrent + 1) == pGapStart && (pGapEnd - pGapStart) > 3) + { + *pOut = ':'; + pOut++; + pCurrent = pGapEnd; + } + + pCurrent++; + } + + return VINF_SUCCESS; +} + + +/** + * Tests if the given string is a valid IPv6 address. + * + * @returns 0 if valid, some random number if not. THIS IS NOT AN IPRT STATUS! + * @param psz The string to test + * @param pszResultAddress plain address, optional read "valid addresses + * and strings" above. + * @param resultAddressSize size of pszResultAddress + * @param addressOnly return only the plain address (no scope) + * Ignored, and will always return the if id + */ +static int rtNetIpv6CheckAddrStr(const char *psz, char *pszResultAddress, size_t resultAddressSize, bool addressOnly, bool followRfc) +{ + int rc; + int rc2; + int returnValue = VERR_NOT_SUPPORTED; /* gcc want's this initialized, I understand its confusion. */ + + char *p = NULL, *pl = NULL; + + size_t memAllocMaxSize = RT_MAX(strlen(psz), resultAddressSize) + 40; + + char *pszAddressOutLocal = (char *)RTMemTmpAlloc(memAllocMaxSize); + char *pszIfIdOutLocal = (char *)RTMemTmpAlloc(memAllocMaxSize); + char *pszAddressRfcOutLocal = (char *)RTMemTmpAlloc(memAllocMaxSize); + + if (!pszAddressOutLocal || !pszIfIdOutLocal || !pszAddressRfcOutLocal) + return VERR_NO_TMP_MEMORY; + + memset(pszAddressOutLocal, '\0', memAllocMaxSize); + memset(pszIfIdOutLocal, '\0', memAllocMaxSize); + memset(pszAddressRfcOutLocal, '\0', memAllocMaxSize); + + rc = rtStrParseAddrStr6(psz, strlen(psz), pszAddressOutLocal, memAllocMaxSize, NULL, pszIfIdOutLocal, memAllocMaxSize, NULL, NULL, followRfc); + + if (rc == 0) + returnValue = VINF_SUCCESS; + + if (rc == 0 && pszResultAddress) + { + // convert the 32 characters to a valid, shortened ipv6 address + + rc2 = rtStrToIpAddr6Str((const char *)pszAddressOutLocal, pszAddressRfcOutLocal, memAllocMaxSize, NULL, 0, followRfc); + + if (rc2 != 0) + returnValue = 951; + + // this is a temporary solution + if (!returnValue && strlen(pszIfIdOutLocal) > 0) // the if identifier is copied over _ALWAYS_ && !addressOnly) + { + p = pszAddressRfcOutLocal + strlen(pszAddressRfcOutLocal); + + *p = '%'; + + p++; + + pl = (char *)memcpy(p, pszIfIdOutLocal, strlen(pszIfIdOutLocal)); + + if (!pl) + returnValue = VERR_NOT_SUPPORTED; + } + + pl = NULL; + + pl = (char *)memcpy(pszResultAddress, pszAddressRfcOutLocal, strlen(pszAddressRfcOutLocal)); + + if (!pl) + returnValue = VERR_NOT_SUPPORTED; + } + + if (rc != 0) + returnValue = VERR_NOT_SUPPORTED; + + if (pszAddressOutLocal) + RTMemTmpFree(pszAddressOutLocal); + + if (pszAddressRfcOutLocal) + RTMemTmpFree(pszAddressRfcOutLocal); + + if (pszIfIdOutLocal) + RTMemTmpFree(pszIfIdOutLocal); + + return returnValue; + +} |