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20 lines
601 B
Go
20 lines
601 B
Go
//go:build !windows
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package udp
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import (
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"errors"
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"syscall"
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)
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// IsUnreachable reports whether a send failed because this host has no way to reach the destination from where it
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// is now, rather than for something transient. Moving from a dual stack network to one without IPv6 turns every send
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// to an IPv6 remote into one of these.
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func IsUnreachable(err error) bool {
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return errors.Is(err, syscall.ENETUNREACH) ||
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errors.Is(err, syscall.EHOSTUNREACH) ||
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errors.Is(err, syscall.EADDRNOTAVAIL) ||
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errors.Is(err, syscall.EAFNOSUPPORT) ||
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errors.Is(err, ErrInvalidIPv6RemoteForSocket)
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}
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