32 lines
1.2 KiB
Go
32 lines
1.2 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@probo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package net
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import "net"
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// IsLoopback reports whether host is a loopback address. It recognizes
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// "localhost" by name and delegates to net.IP.IsLoopback for IP addresses,
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// which covers 127.0.0.0/8, ::1, and IPv4-mapped variants like
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// ::ffff:127.0.0.1.
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func IsLoopback(host string) bool {
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if host == "localhost" {
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return true
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}
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ip := net.ParseIP(host)
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return ip != nil && ip.IsLoopback()
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}
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