NFTables.Expr.UDP (NFTables v0.8.2)

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UDP protocol matching functions for Expr.

Provides the UDP protocol matcher for rule expressions. Works with port matching functions from the Port module.

Import

import NFTables.Expr.UDP

Examples

# Match UDP traffic
udp() |> accept()

# UDP with destination port
udp() |> dport(53) |> accept()

# UDP with port range
udp() |> dport(10000..20000) |> accept()

For more information, see the nftables payload expressions wiki.

Summary

Functions

udp(builder \\ Expr.expr())

Match UDP protocol.

Functions

udp(builder \\ Expr.expr())

@spec udp(NFTables.Expr.t()) :: NFTables.Expr.t()

Match UDP protocol.

Sets the protocol context to UDP, allowing subsequent port matching with dport/sport from the Port module.

Supports dual-arity: can start a new expression or continue an existing one.

Examples

# Start a new expression
udp()

# Continue an existing expression
builder |> udp() |> dport(53)

# UDP DNS query
udp() |> dport(53) |> accept()

Protocol Context

After calling this function, the expression's protocol context is set to :udp, enabling port matching functions to work correctly.