netip
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Package netip defines an IP address type that’s a small value type. Building on that Addr type, the package also defines AddrPort (an IP address and a port), and Prefix (an IP address and a bit length prefix).
netip 包定义了一个 IP 地址类型,它是一个小值类型。在此 Addr 类型之上,该包还定义了 AddrPort(一个 IP 地址和一个端口)和 Prefix(一个 IP 地址和一个位长度前缀)。
Compared to the net.IP type, this package’s Addr type takes less memory, is immutable, and is comparable (supports == and being a map key).
与 net.IP 类型相比,此包的 Addr 类型占用更少的内存,是不可变的,并且是可比较的(支持 == 并成为映射键)。
常量
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变量
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函数
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类型
type Addr
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Addr represents an IPv4 or IPv6 address (with or without a scoped addressing zone), similar to net.IP or net.IPAddr.
Addr 表示 IPv4 或 IPv6 地址(带或不带作用域寻址区域),类似于 net.IP 或 net.IPAddr。
Unlike net.IP or net.IPAddr, Addr is a comparable value type (it supports == and can be a map key) and is immutable.
与 net.IP 或 net.IPAddr 不同,Addr 是一个可比较的值类型(它支持 == 并且可以是映射键),并且是不可变的。
The zero Addr is not a valid IP address. Addr{} is distinct from both 0.0.0.0 and ::.
零 Addr 不是有效的 IP 地址。Addr{} 与 0.0.0.0 和 :: 都不同。
func AddrFrom16
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AddrFrom16 returns the IPv6 address given by the bytes in addr. An IPv4-mapped IPv6 address is left as an IPv6 address. (Use Unmap to convert them if needed.)
AddrFrom16 返回 addr 中的字节给出的 IPv6 地址。IPv4 映射的 IPv6 地址保留为 IPv6 地址。(如果需要,请使用 Unmap 转换它们。)
func AddrFrom4
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AddrFrom4 returns the address of the IPv4 address given by the bytes in addr.
AddrFrom4 返回 addr 中的字节给出的 IPv4 地址的地址。
func AddrFromSlice
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AddrFromSlice parses the 4- or 16-byte byte slice as an IPv4 or IPv6 address. Note that a net.IP can be passed directly as the []byte argument. If slice’s length is not 4 or 16, AddrFromSlice returns Addr{}, false.
AddrFromSlice 将 4 或 16 字节的字节切片解析为 IPv4 或 IPv6 地址。请注意,net.IP 可以直接作为 []byte 参数传递。如果切片的长度不是 4 或 16,AddrFromSlice 将返回 Addr{}、false。
func IPv4Unspecified
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IPv4Unspecified returns the IPv4 unspecified address “0.0.0.0”.
IPv4Unspecified 返回 IPv4 未指定地址“0.0.0.0”。
func IPv6LinkLocalAllNodes
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IPv6LinkLocalAllNodes returns the IPv6 link-local all nodes multicast address ff02::1.
IPv6LinkLocalAllNodes 返回 IPv6 链路本地所有节点多播地址 ff02::1。
func IPv6LinkLocalAllRouters <- go1.20
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IPv6LinkLocalAllRouters returns the IPv6 link-local all routers multicast address ff02::2.
IPv6LinkLocalAllRouters 返回 IPv6 链路本地所有路由器多播地址 ff02::2。
func IPv6Loopback <- go1.20
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IPv6Loopback returns the IPv6 loopback address ::1.
IPv6Loopback 返回 IPv6 环回地址 ::1。
func IPv6Unspecified
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IPv6Unspecified returns the IPv6 unspecified address “::”.
IPv6Unspecified 返回 IPv6 未指定地址“::”。
func MustParseAddr
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MustParseAddr calls ParseAddr(s) and panics on error. It is intended for use in tests with hard-coded strings.
MustParseAddr 调用 ParseAddr(s) 并引发错误恐慌。它旨在用于具有硬编码字符串的测试。
func ParseAddr
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ParseAddr parses s as an IP address, returning the result. The string s can be in dotted decimal (“192.0.2.1”), IPv6 (“2001:db8::68”), or IPv6 with a scoped addressing zone (“fe80::1cc0:3e8c:119f:c2e1%ens18”).
ParseAddr 将 s 解析为 IP 地址,并返回结果。字符串 s 可以是点分十进制 (“192.0.2.1”)、IPv6 (“2001:db8::68”) 或带作用域寻址区域的 IPv6 (“fe80::1cc0:3e8c:119f:c2e1%ens18”)。
(Addr) AppendTo
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AppendTo appends a text encoding of ip, as generated by MarshalText, to b and returns the extended buffer.
AppendTo 将由 MarshalText 生成的 ip 文本编码追加到 b 并返回扩展缓冲区。
(Addr) As16
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As16 returns the IP address in its 16-byte representation. IPv4 addresses are returned as IPv4-mapped IPv6 addresses. IPv6 addresses with zones are returned without their zone (use the Zone method to get it). The ip zero value returns all zeroes.
As16 以其 16 字节表示形式返回 IP 地址。IPv4 地址作为 IPv4 映射的 IPv6 地址返回。带区域的 IPv6 地址不带区域返回(使用 Zone 方法获取)。ip 零值返回所有零。
(Addr) As4
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As4 returns an IPv4 or IPv4-in-IPv6 address in its 4-byte representation. If ip is the zero Addr or an IPv6 address, As4 panics. Note that 0.0.0.0 is not the zero Addr.
As4 以其 4 字节表示形式返回 IPv4 或 IPv4-in-IPv6 地址。如果 ip 是零 Addr 或 IPv6 地址,则 As4 会引发 panic。请注意,0.0.0.0 不是零 Addr。
(Addr) AsSlice
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AsSlice returns an IPv4 or IPv6 address in its respective 4-byte or 16-byte representation.
AsSlice 以其各自的 4 字节或 16 字节表示形式返回 IPv4 或 IPv6 地址。
(Addr) BitLen
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BitLen returns the number of bits in the IP address: 128 for IPv6, 32 for IPv4, and 0 for the zero Addr.
BitLen 返回 IP 地址中的位数:IPv6 为 128,IPv4 为 32,零 Addr 为 0。
Note that IPv4-mapped IPv6 addresses are considered IPv6 addresses and therefore have bit length 128.
请注意,IPv4 映射的 IPv6 地址被视为 IPv6 地址,因此位长为 128。
(Addr) Compare
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Compare returns an integer comparing two IPs. The result will be 0 if ip == ip2, -1 if ip < ip2, and +1 if ip > ip2. The definition of “less than” is the same as the Less method.
Compare 返回一个整数,比较两个 IP。如果 ip == ip2,结果为 0;如果 ip < ip2,结果为 -1;如果 ip > ip2,结果为 +1。“小于”的定义与 Less 方法相同。
(Addr) Is4
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Is4 reports whether ip is an IPv4 address.
Is4 报告 ip 是否是 IPv4 地址。
It returns false for IPv4-mapped IPv6 addresses. See Addr.Unmap.
对于 IPv4 映射的 IPv6 地址,它返回 false。请参阅 Addr.Unmap。
(Addr) Is4In6
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Is4In6 reports whether ip is an IPv4-mapped IPv6 address.
Is4In6 报告 ip 是否是 IPv4 映射的 IPv6 地址。
(Addr) Is6
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Is6 reports whether ip is an IPv6 address, including IPv4-mapped IPv6 addresses.
Is6 报告 ip 是否是 IPv6 地址,包括 IPv4 映射的 IPv6 地址。
(Addr) IsGlobalUnicast
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IsGlobalUnicast reports whether ip is a global unicast address.
IsGlobalUnicast 报告 ip 是否是全局单播地址。
It returns true for IPv6 addresses which fall outside of the current IANA-allocated 2000::/3 global unicast space, with the exception of the link-local address space. It also returns true even if ip is in the IPv4 private address space or IPv6 unique local address space. It returns false for the zero Addr.
对于不在当前 IANA 分配的 2000::/3 全局单播空间范围内的 IPv6 地址,它返回 true,但链路本地地址空间除外。即使 ip 位于 IPv4 私有地址空间或 IPv6 唯一本地地址空间中,它也会返回 true。对于零地址,它返回 false。
For reference, see RFC 1122, RFC 4291, and RFC 4632.
有关参考,请参阅 RFC 1122、RFC 4291 和 RFC 4632。
(Addr) IsInterfaceLocalMulticast
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IsInterfaceLocalMulticast reports whether ip is an IPv6 interface-local multicast address.
IsInterfaceLocalMulticast 报告 ip 是否是 IPv6 接口本地多播地址。
(Addr) IsLinkLocalMulticast
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IsLinkLocalMulticast reports whether ip is a link-local multicast address.
IsLinkLocalMulticast 报告 ip 是否是链路本地多播地址。
(Addr) IsLinkLocalUnicast
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IsLinkLocalUnicast reports whether ip is a link-local unicast address.
IsLinkLocalUnicast 报告 ip 是否是链路本地单播地址。
(Addr) IsLoopback
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IsLoopback reports whether ip is a loopback address.
IsLoopback 报告 ip 是否是环回地址。
(Addr) IsMulticast
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IsMulticast reports whether ip is a multicast address.
IsMulticast 报告 ip 是否是多播地址。
(Addr) IsPrivate
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IsPrivate reports whether ip is a private address, according to RFC 1918 (IPv4 addresses) and RFC 4193 (IPv6 addresses). That is, it reports whether ip is in 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, or fc00::/7. This is the same as net.IP.IsPrivate.
IsPrivate 报告 ip 是否是私有地址,根据 RFC 1918(IPv4 地址)和 RFC 4193(IPv6 地址)。也就是说,它报告 ip 是否在 10.0.0.0/8、172.16.0.0/12、192.168.0.0/16 或 fc00::/7 中。这与 net.IP.IsPrivate 相同。
(Addr) IsUnspecified
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IsUnspecified reports whether ip is an unspecified address, either the IPv4 address “0.0.0.0” or the IPv6 address “::”.
IsUnspecified 报告 ip 是否是未指定地址,即 IPv4 地址“0.0.0.0”或 IPv6 地址“::”。
Note that the zero Addr is not an unspecified address.
请注意,零地址不是未指定地址。
(Addr) IsValid
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IsValid reports whether the Addr is an initialized address (not the zero Addr).
IsValid 报告 Addr 是否是已初始化地址(不是零地址)。
Note that “0.0.0.0” and “::” are both valid values.
请注意,“0.0.0.0”和“::”都是有效值。
(Addr) Less
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Less reports whether ip sorts before ip2. IP addresses sort first by length, then their address. IPv6 addresses with zones sort just after the same address without a zone.
Less 报告 ip 是否在 ip2 之前排序。IP 地址首先按长度排序,然后按其地址排序。带区域的 IPv6 地址紧跟没有区域的相同地址之后排序。
(Addr) MarshalBinary
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MarshalBinary implements the encoding.BinaryMarshaler interface. It returns a zero-length slice for the zero Addr, the 4-byte form for an IPv4 address, and the 16-byte form with zone appended for an IPv6 address.
MarshalBinary 实现 encoding.BinaryMarshaler 接口。它为零地址返回一个零长度切片,为 IPv4 地址返回 4 字节形式,为 IPv6 地址返回附加区域的 16 字节形式。
(Addr) MarshalText
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MarshalText implements the encoding.TextMarshaler interface, The encoding is the same as returned by String, with one exception: If ip is the zero Addr, the encoding is the empty string.
MarshalText 实现 encoding.TextMarshaler 接口,编码与 String 返回的编码相同,但有一个例外:如果 ip 是零地址,则编码为空字符串。
(Addr) Next
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Next returns the address following ip. If there is none, it returns the zero Addr.
Next 返回 ip 之后的地址。如果没有,则返回零地址。
(Addr) Prefix
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Prefix keeps only the top b bits of IP, producing a Prefix of the specified length. If ip is a zero Addr, Prefix always returns a zero Prefix and a nil error. Otherwise, if bits is less than zero or greater than ip.BitLen(), Prefix returns an error.
Prefix 仅保留 IP 的前 b 位,生成指定长度的 Prefix。如果 ip 是零地址,则 Prefix 始终返回零 Prefix 和 nil 错误。否则,如果位数小于零或大于 ip.BitLen(),则 Prefix 返回错误。
(Addr) Prev
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Prev returns the IP before ip. If there is none, it returns the IP zero value.
Prev 返回 ip 之前的 IP。如果没有,则返回 IP 零值。
(Addr) String
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String returns the string form of the IP address ip. It returns one of 5 forms:
String 返回 IP 地址 ip 的字符串形式。它返回 5 种形式之一:
- “invalid IP”, if ip is the zero Addr “无效 IP”,如果 ip 是零 Addr
- IPv4 dotted decimal (“192.0.2.1”) IPv4 点分十进制 (“192.0.2.1”)
- IPv6 (“2001:db8::1”)
- “::ffff:1.2.3.4” (if Is4In6) “::ffff:1.2.3.4” (如果 Is4In6)
- IPv6 with zone (“fe80:db8::1%eth0”) 带区域的 IPv6 (“fe80:db8::1%eth0”)
Note that unlike package net’s IP.String method, IPv4-mapped IPv6 addresses format with a “::ffff:” prefix before the dotted quad.
请注意,与包 net 的 IP.String 方法不同,IPv4 映射的 IPv6 地址格式在点分四元组前带有“::ffff:”前缀。
(Addr) StringExpanded
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StringExpanded is like String but IPv6 addresses are expanded with leading zeroes and no “::” compression. For example, “2001:db8::1” becomes “2001:0db8:0000:0000:0000:0000:0000:0001”.
StringExpanded 与 String 类似,但 IPv6 地址会扩展为前导零,且没有“::”压缩。例如,“2001:db8::1”变为“2001:0db8:0000:0000:0000:0000:0000:0001”。
(Addr) Unmap
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Unmap returns ip with any IPv4-mapped IPv6 address prefix removed.
Unmap 返回 ip,其中删除了任何 IPv4 映射的 IPv6 地址前缀。
That is, if ip is an IPv6 address wrapping an IPv4 address, it returns the wrapped IPv4 address. Otherwise it returns ip unmodified.
也就是说,如果 ip 是一个包装了 IPv4 地址的 IPv6 地址,它将返回包装的 IPv4 地址。否则,它将返回未修改的 ip。
(*Addr) UnmarshalBinary
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UnmarshalBinary implements the encoding.BinaryUnmarshaler interface. It expects data in the form generated by MarshalBinary.
UnmarshalBinary 实现 encoding.BinaryUnmarshaler 接口。它期望以 MarshalBinary 生成的形式接收数据。
(*Addr) UnmarshalText
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UnmarshalText implements the encoding.TextUnmarshaler interface. The IP address is expected in a form accepted by ParseAddr.
UnmarshalText 实现 encoding.TextUnmarshaler 接口。IP 地址应采用 ParseAddr 接受的形式。
If text is empty, UnmarshalText sets *ip to the zero Addr and returns no error.
如果 text 为空,UnmarshalText 将 *ip 设置为零 Addr,并且不返回错误。
(Addr) WithZone
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WithZone returns an IP that’s the same as ip but with the provided zone. If zone is empty, the zone is removed. If ip is an IPv4 address, WithZone is a no-op and returns ip unchanged.
WithZone 返回一个与 ip 相同但具有所提供区域的 IP。如果区域为空,则删除该区域。如果 ip 是 IPv4 地址,则 WithZone 是一个空操作,并返回未更改的 ip。
(Addr) Zone
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Zone returns ip’s IPv6 scoped addressing zone, if any.
Zone 返回 ip 的 IPv6 作用域寻址区域(如果有)。
type AddrPort
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AddrPort is an IP and a port number.
AddrPort 是一个 IP 和一个端口号。
func AddrPortFrom
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AddrPortFrom returns an AddrPort with the provided IP and port. It does not allocate.
AddrPortFrom 使用提供的 IP 和端口返回一个 AddrPort。它不会分配。
func MustParseAddrPort
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MustParseAddrPort calls ParseAddrPort(s) and panics on error. It is intended for use in tests with hard-coded strings.
MustParseAddrPort 调用 ParseAddrPort(s) 并引发错误恐慌。它旨在用于具有硬编码字符串的测试中。
func ParseAddrPort
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ParseAddrPort parses s as an AddrPort.
ParseAddrPort 将 s 解析为 AddrPort。
It doesn’t do any name resolution: both the address and the port must be numeric.
它不会执行任何名称解析:地址和端口都必须是数字。
(AddrPort) Addr
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Addr returns p’s IP address.
Addr 返回 p 的 IP 地址。
(AddrPort) Compare <-go1.22.0
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Compare returns an integer comparing two AddrPorts. The result will be 0 if p == p2, -1 if p < p2, and +1 if p > p2. AddrPorts sort first by IP address, then port.
Compare 返回一个整数,用于比较两个 AddrPort。若 p == p2
,则返回 0;若 p < p2
,则返回 -1;若 p > p2
,则返回 +1。AddrPort 首先根据 IP 地址排序,然后再根据端口排序。
(AddrPort) AppendTo
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AppendTo appends a text encoding of p, as generated by MarshalText, to b and returns the extended buffer.
AppendTo 将 p 的文本编码(由 MarshalText 生成)追加到 b 并返回扩展缓冲区。
(AddrPort) IsValid
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IsValid reports whether p.Addr() is valid. All ports are valid, including zero.
IsValid 报告 p.Addr() 是否有效。所有端口都是有效的,包括零。
(AddrPort) MarshalBinary
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MarshalBinary implements the encoding.BinaryMarshaler interface. It returns Addr.MarshalBinary with an additional two bytes appended containing the port in little-endian.
MarshalBinary 实现 encoding.BinaryMarshaler 接口。它返回 Addr.MarshalBinary,并追加两个字节,其中包含小端序的端口。
(AddrPort) MarshalText
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MarshalText implements the encoding.TextMarshaler interface. The encoding is the same as returned by String, with one exception: if p.Addr() is the zero Addr, the encoding is the empty string.
MarshalText 实现 encoding.TextMarshaler 接口。编码与 String 返回的编码相同,但有一个例外:如果 p.Addr() 是零 Addr,则编码为空字符串。
(AddrPort) Port
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Port returns p’s port.
Port 返回 p 的端口。
(AddrPort) String
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(*AddrPort) UnmarshalBinary
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UnmarshalBinary implements the encoding.BinaryUnmarshaler interface. It expects data in the form generated by MarshalBinary.
UnmarshalBinary 实现 encoding.BinaryUnmarshaler 接口。它期望以 MarshalBinary 生成的形式提供数据。
(*AddrPort) UnmarshalText
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UnmarshalText implements the encoding.TextUnmarshaler interface. The AddrPort is expected in a form generated by MarshalText or accepted by ParseAddrPort.
UnmarshalText 实现 encoding.TextUnmarshaler 接口。AddrPort 预期以 MarshalText 生成的形式提供,或由 ParseAddrPort 接受。
type Prefix
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Prefix is an IP address prefix (CIDR) representing an IP network.
前缀是一个 IP 地址前缀 (CIDR),表示一个 IP 网络。
The first Bits() of Addr() are specified. The remaining bits match any address. The range of Bits() is [0,32] for IPv4 or [0,128] for IPv6.
指定了 Addr() 的第一个 Bits()。剩余的位与任何地址匹配。IPv4 的 Bits() 范围为 [0,32],IPv6 的范围为 [0,128]。
func MustParsePrefix
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MustParsePrefix calls ParsePrefix(s) and panics on error. It is intended for use in tests with hard-coded strings.
MustParsePrefix 调用 ParsePrefix(s) 并引发错误恐慌。它旨在用于具有硬编码字符串的测试中。
func ParsePrefix
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ParsePrefix parses s as an IP address prefix. The string can be in the form “192.168.1.0/24” or “2001:db8::/32”, the CIDR notation defined in RFC 4632 and RFC 4291. IPv6 zones are not permitted in prefixes, and an error will be returned if a zone is present.
ParsePrefix 将 s 解析为 IP 地址前缀。字符串可以采用“192.168.1.0/24”或“2001:db8::/32”的形式,即 RFC 4632 和 RFC 4291 中定义的 CIDR 表示法。前缀中不允许使用 IPv6 区域,如果存在区域,则会返回错误。
Note that masked address bits are not zeroed. Use Masked for that.
请注意,掩码地址位不会清零。为此,请使用 Masked。
func PrefixFrom
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PrefixFrom returns a Prefix with the provided IP address and bit prefix length.
PrefixFrom 返回一个具有提供的 IP 地址和位前缀长度的前缀。
It does not allocate. Unlike Addr.Prefix, PrefixFrom does not mask off the host bits of ip.
它不会分配。与 Addr.Prefix 不同,PrefixFrom 不会屏蔽 ip 的主机位。
If bits is less than zero or greater than ip.BitLen, Prefix.Bits will return an invalid value -1.
如果位数小于零或大于 ip.BitLen,则 Prefix.Bits 将返回无效值 -1。
(Prefix) Addr
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Addr returns p’s IP address.
Addr 返回 p 的 IP 地址。
(Prefix) AppendTo
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AppendTo appends a text encoding of p, as generated by MarshalText, to b and returns the extended buffer.
AppendTo 将 p 的文本编码(由 MarshalText 生成)追加到 b 并返回扩展的缓冲区。
(Prefix) Bits
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Bits returns p’s prefix length.
Bits 返回 p 的前缀长度。
It reports -1 if invalid.
如果无效,则报告 -1。
(Prefix) Contains
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Contains reports whether the network p includes ip.
Contains 报告网络 p 是否包含 ip。
An IPv4 address will not match an IPv6 prefix. An IPv4-mapped IPv6 address will not match an IPv4 prefix. A zero-value IP will not match any prefix. If ip has an IPv6 zone, Contains returns false, because Prefixes strip zones.
IPv4 地址不会匹配 IPv6 前缀。IPv4 映射的 IPv6 地址不会匹配 IPv6 前缀。零值 IP 不会匹配任何前缀。如果 ip 具有 IPv6 区域,则 Contains 返回 false,因为前缀会剥离区域。
(Prefix) IsSingleIP
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IsSingleIP reports whether p contains exactly one IP.
IsSingleIP 报告 p 是否恰好包含一个 IP。
(Prefix) IsValid
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IsValid reports whether p.Bits() has a valid range for p.Addr(). If p.Addr() is the zero Addr, IsValid returns false. Note that if p is the zero Prefix, then p.IsValid() == false.
IsValid 报告 p.Bits() 是否具有 p.Addr() 的有效范围。如果 p.Addr() 是零 Addr,则 IsValid 返回 false。请注意,如果 p 是零前缀,则 p.IsValid() == false。
(Prefix) MarshalBinary
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MarshalBinary implements the encoding.BinaryMarshaler interface. It returns Addr.MarshalBinary with an additional byte appended containing the prefix bits.
MarshalBinary 实现 encoding.BinaryMarshaler 接口。它返回 Addr.MarshalBinary,并附加一个包含前缀位的字节。
(Prefix) MarshalText
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MarshalText implements the encoding.TextMarshaler interface, The encoding is the same as returned by String, with one exception: If p is the zero value, the encoding is the empty string.
MarshalText 实现 encoding.TextMarshaler 接口,编码与 String 返回的编码相同,但有一个例外:如果 p 是零值,则编码为空字符串。
(Prefix) Masked
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Masked returns p in its canonical form, with all but the high p.Bits() bits of p.Addr() masked off.
Masked 以其规范形式返回 p,其中 p.Addr() 的所有位都被屏蔽掉,除了 p.Bits() 的高位。
If p is zero or otherwise invalid, Masked returns the zero Prefix.
如果 p 为零或无效,Masked 返回零前缀。
(Prefix) Overlaps
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Overlaps reports whether p and o contain any IP addresses in common.
重叠报告 p 和 o 是否包含任何公共 IP 地址。
If p and o are of different address families or either have a zero IP, it reports false. Like the Contains method, a prefix with an IPv4-mapped IPv6 address is still treated as an IPv6 mask.
如果 p 和 o 属于不同的地址族或任一地址具有零 IP,则报告为 false。与 Contains 方法一样,具有 IPv4 映射 IPv6 地址的前缀仍被视为 IPv6 掩码。
(Prefix) String
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String returns the CIDR notation of p: “/”.
字符串返回 p 的 CIDR 表示法:“/”。
(*Prefix) UnmarshalBinary
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UnmarshalBinary implements the encoding.BinaryUnmarshaler interface. It expects data in the form generated by MarshalBinary.
UnmarshalBinary 实现 encoding.BinaryUnmarshaler 接口。它期望以 MarshalBinary 生成的形式提供数据。
(*Prefix) UnmarshalText
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UnmarshalText implements the encoding.TextUnmarshaler interface. The IP address is expected in a form accepted by ParsePrefix or generated by MarshalText.
UnmarshalText 实现 encoding.TextUnmarshaler 接口。IP 地址应采用 ParsePrefix 接受或由 MarshalText 生成的形式。