diff options
Diffstat (limited to 'src/network/kernel/qhostaddress.cpp')
| -rw-r--r-- | src/network/kernel/qhostaddress.cpp | 222 |
1 files changed, 175 insertions, 47 deletions
diff --git a/src/network/kernel/qhostaddress.cpp b/src/network/kernel/qhostaddress.cpp index a1adc61c4c..bf00c6efce 100644 --- a/src/network/kernel/qhostaddress.cpp +++ b/src/network/kernel/qhostaddress.cpp @@ -64,32 +64,6 @@ QT_BEGIN_NAMESPACE - -class QHostAddressPrivate : public QSharedData -{ -public: - QHostAddressPrivate(); - - void setAddress(quint32 a_ = 0); - void setAddress(const quint8 *a_); - void setAddress(const Q_IPV6ADDR &a_); - - bool parse(const QString &ipString); - void clear(); - - QString scopeId; - - union { - Q_IPV6ADDR a6; // IPv6 address - struct { quint64 c[2]; } a6_64; - struct { quint32 c[4]; } a6_32; - }; - quint32 a; // IPv4 address - qint8 protocol; - - friend class QHostAddress; -}; - QHostAddressPrivate::QHostAddressPrivate() : a(0), protocol(QAbstractSocket::UnknownNetworkLayerProtocol) { @@ -205,6 +179,75 @@ void QHostAddressPrivate::clear() memset(&a6, 0, sizeof(a6)); } +AddressClassification QHostAddressPrivate::classify() const +{ + if (a) { + // This is an IPv4 address or an IPv6 v4-mapped address includes all + // IPv6 v4-compat addresses, except for ::ffff:0.0.0.0 (because `a' is + // zero). See setAddress(quint8*) below, which calls convertToIpv4(), + // for details. + // Source: RFC 5735 + if ((a & 0xff000000U) == 0x7f000000U) // 127.0.0.0/8 + return LoopbackAddress; + if ((a & 0xf0000000U) == 0xe0000000U) // 224.0.0.0/4 + return MulticastAddress; + if ((a & 0xffff0000U) == 0xa9fe0000U) // 169.254.0.0/16 + return LinkLocalAddress; + if ((a & 0xff000000U) == 0) // 0.0.0.0/8 except 0.0.0.0 (handled below) + return LocalNetAddress; + if ((a & 0xf0000000U) == 0xf0000000U) { // 240.0.0.0/4 + if (a == 0xffffffffU) // 255.255.255.255 + return BroadcastAddress; + return UnknownAddress; + } + + // Not testing for PrivateNetworkAddress and TestNetworkAddress + // since we don't need them yet. + return GlobalAddress; + } + + // As `a' is zero, this address is either ::ffff:0.0.0.0 or a non-v4-mapped IPv6 address. + // Source: https://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml + if (a6_64.c[0]) { + quint32 high16 = qFromBigEndian(a6_32.c[0]) >> 16; + switch (high16 >> 8) { + case 0xff: // ff00::/8 + return MulticastAddress; + case 0xfe: + switch (high16 & 0xffc0) { + case 0xfec0: // fec0::/10 + return SiteLocalAddress; + + case 0xfe80: // fe80::/10 + return LinkLocalAddress; + + default: // fe00::/9 + return UnknownAddress; + } + case 0xfd: // fc00::/7 + case 0xfc: + return UniqueLocalAddress; + default: + return GlobalAddress; + } + } + + quint64 low64 = qFromBigEndian(a6_64.c[1]); + if (low64 == 1) // ::1 + return LoopbackAddress; + if (low64 >> 32 == 0xffff) { // ::ffff:0.0.0.0/96 + Q_ASSERT(quint32(low64) == 0); + return LocalNetAddress; + } + if (low64) // not :: + return GlobalAddress; + + if (protocol == QAbstractSocket::UnknownNetworkLayerProtocol) + return UnknownAddress; + + // only :: and 0.0.0.0 remain now + return LocalNetAddress; +} bool QNetmask::setAddress(const QHostAddress &address) { @@ -685,7 +728,7 @@ void QHostAddress::setAddress(SpecialAddress address) */ quint32 QHostAddress::toIPv4Address() const { - return toIPv4Address(Q_NULLPTR); + return toIPv4Address(nullptr); } /*! @@ -1154,21 +1197,91 @@ QPair<QHostAddress, int> QHostAddress::parseSubnet(const QString &subnet) */ bool QHostAddress::isLoopback() const { - if ((d->a & 0xFF000000) == 0x7F000000) - return true; // v4 range (including IPv6 wrapped IPv4 addresses) - if (d->protocol == QAbstractSocket::IPv6Protocol) { -#ifdef __SSE2__ - const __m128i loopback = _mm_setr_epi8(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1); - __m128i ipv6 = _mm_loadu_si128((const __m128i *)d->a6.c); - __m128i cmp = _mm_cmpeq_epi8(ipv6, loopback); - return _mm_movemask_epi8(cmp) == 0xffff; -#else - if (d->a6_64.c[0] != 0 || qFromBigEndian(d->a6_64.c[1]) != 1) - return false; -#endif - return true; - } - return false; + return d->classify() == LoopbackAddress; +} + +/*! + \since 5.11 + + Returns \c true if the address is an IPv4 or IPv6 global address, \c false + otherwise. A global address is an address that is not reserved for + special purposes (like loopback or multicast) or future purposes. + + Note that IPv6 unique local unicast addresses are considered global + addresses (see isUniqueLocalUnicast()), as are IPv4 addresses reserved for + local networks by \l {https://tools.ietf.org/html/rfc1918}{RFC 1918}. + + Also note that IPv6 site-local addresses are deprecated and should be + considered as global in new applications. This function returns true for + site-local addresses too. + + \sa isLoopback(), isSiteLocal(), isUniqueLocalUnicast() +*/ +bool QHostAddress::isGlobal() const +{ + return d->classify() & GlobalAddress; // GlobalAddress is a bit +} + +/*! + \since 5.11 + + Returns \c true if the address is an IPv4 or IPv6 link-local address, \c + false otherwise. + + An IPv4 link-local address is an address in the network 169.254.0.0/16. An + IPv6 link-local address is one in the network fe80::/10. See the + \l{https://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml}{IANA + IPv6 Address Space} registry for more information. + + \sa isLoopback(), isGlobal(). isMulticast(), isSiteLocal(), isUniqueLocalUnicast() +*/ +bool QHostAddress::isLinkLocal() const +{ + return d->classify() == LinkLocalAddress; +} + +/*! + \since 5.11 + + Returns \c true if the address is an IPv6 site-local address, \c + false otherwise. + + An IPv6 site-local address is one in the network fec0::/10. See the + \l{https://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml}{IANA + IPv6 Address Space} registry for more information. + + IPv6 site-local addresses are deprecated and should not be depended upon in + new applications. New applications should not depend on this function and + should consider site-local addresses the same as global (which is why + isGlobal() also returns true). Site-local addresses were replaced by Unique + Local Addresses (ULA). + + \sa isLoopback(), isGlobal(), isMulticast(), isLinkLocal(), isUniqueLocalUnicast() +*/ +bool QHostAddress::isSiteLocal() const +{ + return d->classify() == SiteLocalAddress; +} + +/*! + \since 5.11 + + Returns \c true if the address is an IPv6 unique local unicast address, \c + false otherwise. + + An IPv6 unique local unicast address is one in the network fc00::/7. See the + \l{https://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml} + {IANA IPv6 Address Space} registry for more information. + + Note that Unique local unicast addresses count as global addresses too. RFC + 4193 says that, in practice, "applications may treat these addresses like + global scoped addresses." Only routers need care about the distinction. + + \sa isLoopback(), isGlobal(), isMulticast(), isLinkLocal(), isUniqueLocalUnicast() +*/ +bool QHostAddress::isUniqueLocalUnicast() const +{ + return d->classify() == UniqueLocalAddress; } /*! @@ -1176,14 +1289,29 @@ bool QHostAddress::isLoopback() const Returns \c true if the address is an IPv4 or IPv6 multicast address, \c false otherwise. + + \sa isLoopback(), isGlobal(), isLinkLocal(), isSiteLocal(), isUniqueLocalUnicast() */ bool QHostAddress::isMulticast() const { - if ((d->a & 0xF0000000) == 0xE0000000) - return true; // 224.0.0.0-239.255.255.255 (including v4-mapped IPv6 addresses) - if (d->protocol == QAbstractSocket::IPv6Protocol) - return d->a6.c[0] == 0xff; - return false; + return d->classify() == MulticastAddress; +} + +/*! + \since 5.11 + + Returns \c true if the address is the IPv4 broadcast address, \c false + otherwise. The IPv4 broadcast address is 255.255.255.255. + + Note that this function does not return true for an IPv4 network's local + broadcast address. For that, please use \l QNetworkInterface to obtain the + broadcast addresses of the local machine. + + \sa isLoopback(), isGlobal(), isMulticast(), isLinkLocal(), isUniqueLocalUnicast() +*/ +bool QHostAddress::isBroadcast() const +{ + return d->classify() == BroadcastAddress; } #ifndef QT_NO_DEBUG_STREAM |