diff options
Diffstat (limited to 'src/VBox/Runtime/common/net/netaddrstr2.cpp')
| -rw-r--r-- | src/VBox/Runtime/common/net/netaddrstr2.cpp | 618 |
1 files changed, 618 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/net/netaddrstr2.cpp b/src/VBox/Runtime/common/net/netaddrstr2.cpp new file mode 100644 index 00000000..cfc8fa18 --- /dev/null +++ b/src/VBox/Runtime/common/net/netaddrstr2.cpp @@ -0,0 +1,618 @@ +/* $Id: netaddrstr2.cpp $ */ +/** @file + * IPRT - Network Address String Handling. + */ + +/* + * Copyright (C) 2013-2020 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. + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include "internal/iprt.h" +#include <iprt/net.h> + +#include <iprt/asm.h> +#include <iprt/errcore.h> +#include <iprt/mem.h> +#include <iprt/string.h> +#include <iprt/stream.h> +#include "internal/string.h" + + +DECLHIDDEN(int) rtNetStrToIPv4AddrEx(const char *pcszAddr, PRTNETADDRIPV4 pAddr, + char **ppszNext) +{ + char *pszNext; + int rc; + + AssertPtrReturn(pcszAddr, VERR_INVALID_PARAMETER); + AssertPtrReturn(pAddr, VERR_INVALID_PARAMETER); + + rc = RTStrToUInt8Ex(pcszAddr, &pszNext, 10, &pAddr->au8[0]); + if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_CHARS) + return VERR_INVALID_PARAMETER; + if (*pszNext++ != '.') + return VERR_INVALID_PARAMETER; + + rc = RTStrToUInt8Ex(pszNext, &pszNext, 10, &pAddr->au8[1]); + if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_CHARS) + return VERR_INVALID_PARAMETER; + if (*pszNext++ != '.') + return VERR_INVALID_PARAMETER; + + rc = RTStrToUInt8Ex(pszNext, &pszNext, 10, &pAddr->au8[2]); + if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_CHARS) + return VERR_INVALID_PARAMETER; + if (*pszNext++ != '.') + return VERR_INVALID_PARAMETER; + + rc = RTStrToUInt8Ex(pszNext, &pszNext, 10, &pAddr->au8[3]); + if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_SPACES && rc != VWRN_TRAILING_CHARS) + return VERR_INVALID_PARAMETER; + + if (ppszNext != NULL) + *ppszNext = pszNext; + return rc; +} + + +RTDECL(int) RTNetStrToIPv4AddrEx(const char *pcszAddr, PRTNETADDRIPV4 pAddr, + char **ppszNext) +{ + return rtNetStrToIPv4AddrEx(pcszAddr, pAddr, ppszNext); +} +RT_EXPORT_SYMBOL(RTNetStrToIPv4AddrEx); + + +RTDECL(int) RTNetStrToIPv4Addr(const char *pcszAddr, PRTNETADDRIPV4 pAddr) +{ + char *pszNext; + int rc; + + AssertPtrReturn(pcszAddr, VERR_INVALID_PARAMETER); + AssertPtrReturn(pAddr, VERR_INVALID_PARAMETER); + + pcszAddr = RTStrStripL(pcszAddr); + rc = rtNetStrToIPv4AddrEx(pcszAddr, pAddr, &pszNext); + if (RT_FAILURE(rc) || rc == VWRN_TRAILING_CHARS) + return VERR_INVALID_PARAMETER; + + return VINF_SUCCESS; +} +RT_EXPORT_SYMBOL(RTNetStrToIPv4Addr); + + +RTDECL(bool) RTNetIsIPv4AddrStr(const char *pcszAddr) +{ + RTNETADDRIPV4 addrIPv4; + char *pszNext; + int rc; + + if (pcszAddr == NULL) + return false; + + rc = rtNetStrToIPv4AddrEx(pcszAddr, &addrIPv4, &pszNext); + if (rc != VINF_SUCCESS) + return false; + + if (*pszNext != '\0') + return false; + + return true; +} +RT_EXPORT_SYMBOL(RTNetIsIPv4AddrStr); + + +RTDECL(bool) RTNetStrIsIPv4AddrAny(const char *pcszAddr) +{ + RTNETADDRIPV4 addrIPv4; + char *pszNext; + int rc; + + if (pcszAddr == NULL) + return false; + + pcszAddr = RTStrStripL(pcszAddr); + rc = rtNetStrToIPv4AddrEx(pcszAddr, &addrIPv4, &pszNext); + if (RT_FAILURE(rc) || rc == VWRN_TRAILING_CHARS) + return false; + + if (addrIPv4.u != 0u) /* INADDR_ANY? */ + return false; + + return true; +} +RT_EXPORT_SYMBOL(RTNetStrIsIPv4AddrAny); + + +RTDECL(int) RTNetMaskToPrefixIPv4(PCRTNETADDRIPV4 pMask, int *piPrefix) +{ + AssertReturn(pMask != NULL, VERR_INVALID_PARAMETER); + + if (pMask->u == 0) + { + if (piPrefix != NULL) + *piPrefix = 0; + return VINF_SUCCESS; + } + + const uint32_t uMask = RT_N2H_U32(pMask->u); + + uint32_t uPrefixMask = UINT32_C(0xffffffff); + int iPrefixLen = 32; + + while (iPrefixLen > 0) + { + if (uMask == uPrefixMask) + { + if (piPrefix != NULL) + *piPrefix = iPrefixLen; + return VINF_SUCCESS; + } + + --iPrefixLen; + uPrefixMask <<= 1; + } + + return VERR_INVALID_PARAMETER; +} +RT_EXPORT_SYMBOL(RTNetMaskToPrefixIPv4); + + +RTDECL(int) RTNetPrefixToMaskIPv4(int iPrefix, PRTNETADDRIPV4 pMask) +{ + AssertReturn(pMask != NULL, VERR_INVALID_PARAMETER); + + if (RT_UNLIKELY(iPrefix < 0 || 32 < iPrefix)) + return VERR_INVALID_PARAMETER; + + if (RT_LIKELY(iPrefix != 0)) + pMask->u = RT_H2N_U32(UINT32_C(0xffffffff) << (32 - iPrefix)); + else /* avoid UB in the shift */ + pMask->u = 0; + + return VINF_SUCCESS; +} +RT_EXPORT_SYMBOL(RTNetPrefixToMaskIPv4); + + +RTDECL(int) RTNetStrToIPv4Cidr(const char *pcszAddr, PRTNETADDRIPV4 pAddr, int *piPrefix) +{ + RTNETADDRIPV4 Addr; + uint8_t u8Prefix; + char *pszNext; + int rc; + + AssertPtrReturn(pcszAddr, VERR_INVALID_PARAMETER); + AssertPtrReturn(pAddr, VERR_INVALID_PARAMETER); + AssertPtrReturn(piPrefix, VERR_INVALID_PARAMETER); + + pcszAddr = RTStrStripL(pcszAddr); + rc = rtNetStrToIPv4AddrEx(pcszAddr, &Addr, &pszNext); + if (RT_FAILURE(rc)) + return rc; + + /* if prefix is missing, treat is as exact (/32) address specification */ + if (*pszNext == '\0' || rc == VWRN_TRAILING_SPACES) + { + *pAddr = Addr; + *piPrefix = 32; + return VINF_SUCCESS; + } + + if (*pszNext != '/') + return VERR_INVALID_PARAMETER; + + ++pszNext; + rc = RTStrToUInt8Ex(pszNext, &pszNext, 10, &u8Prefix); + if (RT_FAILURE(rc) || rc == VWRN_TRAILING_CHARS) + return VERR_INVALID_PARAMETER; + + if (u8Prefix == 0 || u8Prefix > 32) + return VERR_INVALID_PARAMETER; + + *pAddr = Addr; + *piPrefix = u8Prefix; + return VINF_SUCCESS; +} +RT_EXPORT_SYMBOL(RTNetStrToIPv4Cidr); + + +static int rtNetStrToHexGroup(const char *pcszValue, char **ppszNext, + uint16_t *pu16) +{ + char *pszNext; + int rc; + + rc = RTStrToUInt16Ex(pcszValue, &pszNext, 16, pu16); + if (RT_FAILURE(rc)) + return rc; + + if ( rc != VINF_SUCCESS + && rc != VWRN_TRAILING_CHARS + && rc != VWRN_TRAILING_SPACES) + { + return -rc; /* convert warning to error */ + } + + /* parser always accepts 0x prefix */ + if (pcszValue[0] == '0' && (pcszValue[1] == 'x' || pcszValue[1] == 'X')) + { + if (pu16) + *pu16 = 0; + if (ppszNext) + *ppszNext = (/* UNCONST */ char *)pcszValue + 1; /* to 'x' */ + return VWRN_TRAILING_CHARS; + } + + /* parser accepts leading zeroes "000000f" */ + if (pszNext - pcszValue > 4) + return VERR_PARSE_ERROR; + + if (ppszNext) + *ppszNext = pszNext; + return rc; +} + + +/* + * This function deals only with the hex-group IPv6 address syntax + * proper (with possible embedded IPv4). + */ +DECLHIDDEN(int) rtNetStrToIPv6AddrBase(const char *pcszAddr, PRTNETADDRIPV6 pAddrResult, + char **ppszNext) +{ + RTNETADDRIPV6 ipv6; + RTNETADDRIPV4 ipv4; + const char *pcszPos; + char *pszNext; + int iGroup; + uint16_t u16; + int rc; + + RT_ZERO(ipv6); + + pcszPos = pcszAddr; + + if (pcszPos[0] == ':') /* compressed zero run at the beginning? */ + { + if (pcszPos[1] != ':') + return VERR_PARSE_ERROR; + + pcszPos += 2; /* skip over "::" */ + pszNext = (/* UNCONST */ char *)pcszPos; + iGroup = 1; + } + else + { + /* + * Scan forward until we either get complete address or find + * "::" compressed zero run. + */ + pszNext = NULL; /* (MSC incorrectly thinks it may be used unitialized) */ + for (iGroup = 0; iGroup < 8; ++iGroup) + { + /* check for embedded IPv4 at the end */ + if (iGroup == 6) + { + rc = rtNetStrToIPv4AddrEx(pcszPos, &ipv4, &pszNext); + if (rc == VINF_SUCCESS) + { + ipv6.au32[3] = ipv4.au32[0]; + iGroup = 8; /* filled 6 and 7 */ + break; /* we are done */ + } + } + + rc = rtNetStrToHexGroup(pcszPos, &pszNext, &u16); + if (RT_FAILURE(rc)) + return VERR_PARSE_ERROR; + + ipv6.au16[iGroup] = RT_H2N_U16(u16); + + if (iGroup == 7) + pcszPos = pszNext; + else + { + /* skip the colon that delimits this group */ + if (*pszNext != ':') + return VERR_PARSE_ERROR; + pcszPos = pszNext + 1; + + /* compressed zero run? */ + if (*pcszPos == ':') + { + ++pcszPos; /* skip over :: */ + pszNext += 2; /* skip over :: (in case we are done) */ + iGroup += 2; /* current field and the zero in the next */ + break; + } + } + } + } + + if (iGroup != 8) + { + /* + * iGroup is the first group that can be filled by the part of + * the address after "::". + */ + RTNETADDRIPV6 ipv6Tail; + const int iMaybeStart = iGroup; + int j; + + RT_ZERO(ipv6Tail); + + /* + * We try to accept longest match; we'll shift if necessary. + * Unlike the first loop, a failure to parse a group doesn't + * mean invalid address. + */ + for (; iGroup < 8; ++iGroup) + { + /* check for embedded IPv4 at the end */ + if (iGroup <= 6) + { + rc = rtNetStrToIPv4AddrEx(pcszPos, &ipv4, &pszNext); + if (rc == VINF_SUCCESS) + { + ipv6Tail.au16[iGroup] = ipv4.au16[0]; + ipv6Tail.au16[iGroup + 1] = ipv4.au16[1]; + iGroup = iGroup + 2; /* these two are done */ + break; /* the rest is trailer */ + } + } + + rc = rtNetStrToHexGroup(pcszPos, &pszNext, &u16); + if (RT_FAILURE(rc)) + break; + + ipv6Tail.au16[iGroup] = RT_H2N_U16(u16); + + if (iGroup == 7) + pcszPos = pszNext; + else + { + if (*pszNext != ':') + { + ++iGroup; /* this one is done */ + break; /* the rest is trailer */ + } + + pcszPos = pszNext + 1; + } + } + + for (j = 7, --iGroup; iGroup >= iMaybeStart; --j, --iGroup) + ipv6.au16[j] = ipv6Tail.au16[iGroup]; + } + + if (pAddrResult != NULL) + memcpy(pAddrResult, &ipv6, sizeof(ipv6)); + if (ppszNext != NULL) + *ppszNext = pszNext; + return VINF_SUCCESS; +} + + +DECLHIDDEN(int) rtNetStrToIPv6AddrEx(const char *pcszAddr, PRTNETADDRIPV6 pAddr, + char **ppszZone, char **ppszNext) +{ + char *pszNext, *pszZone; + int rc; + + rc = rtNetStrToIPv6AddrBase(pcszAddr, pAddr, &pszNext); + if (RT_FAILURE(rc)) + return rc; + + if (*pszNext != '%') /* is there a zone id? */ + { + pszZone = NULL; + } + else + { + pszZone = pszNext + 1; /* skip '%' zone id delimiter */ + if (*pszZone == '\0') + return VERR_PARSE_ERROR; /* empty zone id */ + + /* + * XXX: this is speculative as zone id syntax is + * implementation dependent, so we kinda guess here (accepting + * unreserved characters from URI syntax). + */ + for (pszNext = pszZone; *pszNext != '\0'; ++pszNext) + { + const char c = *pszNext; + if ( !('0' <= c && c <= '9') + && !('a' <= c && c <= 'z') + && !('A' <= c && c <= 'Z') + && c != '_' + && c != '.' + && c != '-' + && c != '~') + { + break; + } + } + } + + if (ppszZone != NULL) + *ppszZone = pszZone; + if (ppszNext != NULL) + *ppszNext = pszNext; + + if (*pszNext == '\0') /* all input string consumed */ + return VINF_SUCCESS; + else + { + while (*pszNext == ' ' || *pszNext == '\t') + ++pszNext; + if (*pszNext == '\0') + return VWRN_TRAILING_SPACES; + else + return VWRN_TRAILING_CHARS; + } +} + + +RTDECL(int) RTNetStrToIPv6AddrEx(const char *pcszAddr, PRTNETADDRIPV6 pAddr, + char **ppszNext) +{ + AssertPtrReturn(pcszAddr, VERR_INVALID_PARAMETER); + AssertPtrReturn(pAddr, VERR_INVALID_PARAMETER); + + return rtNetStrToIPv6AddrBase(pcszAddr, pAddr, ppszNext); +} +RT_EXPORT_SYMBOL(RTNetStrToIPv6AddrEx); + + +RTDECL(int) RTNetStrToIPv6Addr(const char *pcszAddr, PRTNETADDRIPV6 pAddr, + char **ppszZone) +{ + int rc; + + AssertPtrReturn(pcszAddr, VERR_INVALID_PARAMETER); + AssertPtrReturn(pAddr, VERR_INVALID_PARAMETER); + AssertPtrReturn(ppszZone, VERR_INVALID_PARAMETER); + + pcszAddr = RTStrStripL(pcszAddr); + rc = rtNetStrToIPv6AddrEx(pcszAddr, pAddr, ppszZone, NULL); + if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_SPACES) + return VERR_INVALID_PARAMETER; + + return VINF_SUCCESS; +} +RT_EXPORT_SYMBOL(RTNetStrToIPv6Addr); + + +RTDECL(bool) RTNetIsIPv6AddrStr(const char *pcszAddr) +{ + RTNETADDRIPV6 addrIPv6; + int rc; + + if (pcszAddr == NULL) + return false; + + rc = rtNetStrToIPv6AddrEx(pcszAddr, &addrIPv6, NULL, NULL); + if (rc != VINF_SUCCESS) + return false; + + return true; +} +RT_EXPORT_SYMBOL(RTNetIsIPv6AddrStr); + + +RTDECL(bool) RTNetStrIsIPv6AddrAny(const char *pcszAddr) +{ + RTNETADDRIPV6 addrIPv6; + char *pszZone, *pszNext; + int rc; + + if (pcszAddr == NULL) + return false; + + pcszAddr = RTStrStripL(pcszAddr); + rc = rtNetStrToIPv6AddrEx(pcszAddr, &addrIPv6, &pszZone, &pszNext); + if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_SPACES) + return false; + + if (pszZone != NULL) + return false; + + if (addrIPv6.s.Lo != 0 || addrIPv6.s.Hi != 0) /* in6addr_any? */ + return false; + + return true; +} +RT_EXPORT_SYMBOL(RTNetStrIsIPv6AddrAny); + + +RTDECL(int) RTNetMaskToPrefixIPv6(PCRTNETADDRIPV6 pMask, int *piPrefix) +{ + AssertReturn(pMask != NULL, VERR_INVALID_PARAMETER); + + int iPrefix = 0; + unsigned int i; + + for (i = 0; i < RT_ELEMENTS(pMask->au8); ++i) + { + int iBits; + switch (pMask->au8[i]) + { + case 0x00: iBits = 0; break; + case 0x80: iBits = 1; break; + case 0xc0: iBits = 2; break; + case 0xe0: iBits = 3; break; + case 0xf0: iBits = 4; break; + case 0xf8: iBits = 5; break; + case 0xfc: iBits = 6; break; + case 0xfe: iBits = 7; break; + case 0xff: iBits = 8; break; + default: /* non-contiguous mask */ + return VERR_INVALID_PARAMETER; + } + + iPrefix += iBits; + if (iBits != 8) + break; + } + + for (++i; i < RT_ELEMENTS(pMask->au8); ++i) + if (pMask->au8[i] != 0) + return VERR_INVALID_PARAMETER; + + if (piPrefix != NULL) + *piPrefix = iPrefix; + return VINF_SUCCESS; +} +RT_EXPORT_SYMBOL(RTNetMaskToPrefixIPv6); + + +RTDECL(int) RTNetPrefixToMaskIPv6(int iPrefix, PRTNETADDRIPV6 pMask) +{ + AssertReturn(pMask != NULL, VERR_INVALID_PARAMETER); + + if (RT_UNLIKELY(iPrefix < 0 || 128 < iPrefix)) + return VERR_INVALID_PARAMETER; + + for (unsigned int i = 0; i < RT_ELEMENTS(pMask->au32); ++i) + { + if (iPrefix == 0) + { + pMask->au32[i] = 0; + } + else if (iPrefix >= 32) + { + pMask->au32[i] = UINT32_C(0xffffffff); + iPrefix -= 32; + } + else + { + pMask->au32[i] = RT_H2N_U32(UINT32_C(0xffffffff) << (32 - iPrefix)); + iPrefix = 0; + } + } + + return VINF_SUCCESS; +} +RT_EXPORT_SYMBOL(RTNetPrefixToMaskIPv6); |