51 lines
943 B
Plaintext
51 lines
943 B
Plaintext
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#!/usr/bin/env bash
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set -euxo pipefail
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ensure_dummy_loaded () {
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if [ -z "$(lsmod | grep dummy)"]
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then
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sudo modprobe dummy
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fi
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}
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maybe_add_device () {
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DEVICE="${1}"
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if [ -z "$(ip --brief link | grep ${DEVICE})"]
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then
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sudo ip link add ${DEVICE} type dummy
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fi
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}
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add_address () {
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DEVICE="${1}"
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ADDR="${2}"
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EXISTING="$(ip --brief addr show "${DEVICE}" | awk '{print $3}')"
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if [ ! -z "${EXISTING}" ]
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then
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if [ "${EXISTING}" == "${ADDR}" ]
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then
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return
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fi
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sudo ip addr flush dev "${DEVICE}"
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fi
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sudo ip link set dev "${DEVICE}" up
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sudo ip addr add "${ADDR}" dev "${DEVICE}"
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}
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flush_device () {
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DEVICE="${1}"
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sudo ip addr flush dev "${DEVICE}"
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sudo ip link set dev "${DEVICE}" down
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}
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ensure_dummy_loaded
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maybe_add_device deveth0
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maybe_add_device deveth1
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add_address deveth0 192.168.4.250/24
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flush_device deveth1
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