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The script helps to setup a bridge for qemu to connect to the local network Signed-off-by: Filip Gołaś <filip.golas@3mdeb.com>
69 lines
1.6 KiB
Bash
Executable File
69 lines
1.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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# SPDX-FileCopyrightText: 2025 3mdeb <contact@3mdeb.com>
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#
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# SPDX-License-Identifier: Apache-2.0
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INTERFACE=$1
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DEL=$2
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BR_NAME=br0
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function print_help {
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echo ""
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echo "Usage: $0 <interface> [del]"
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echo ""
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echo "The script creates a bridged interface that will be connected"
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echo "to a network of given <interface>. The given interface is"
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echo "toggled down."
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echo ""
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echo "Use optional [del] option to delete the bridge and restore"
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echo "the original interface"
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echo ""
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echo "Examples:"
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echo " Set up bridge interface:"
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echo " $0 enp0s1"
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echo " Remove bridge and restore original interface:"
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echo " $0 enp0s1 del"
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}
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if [[ -z $INTERFACE ]]; then
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print_help
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exit 1
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fi
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ip link show $INTERFACE &> /dev/null
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if [[ $? -ne 0 ]]; then
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print_help
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exit 1
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fi
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if [[ $DEL == "del" ]]; then
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ip link show $BR_NAME &> /dev/null
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if [[ $? -ne 0 ]]; then
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echo "Bridge interface $BR_NAME does not exist"
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exit 0
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fi
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BR_IP=$(ip addr show $BR_NAME | awk '/inet / {print $2}')
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echo "Deleting $BR_NAME IP: $BR_IP on $INTERFACE"
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ip link del $BR_NAME
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ip link set $INTERFACE up
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else
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ip link show $BR_NAME &> /dev/null
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if [[ $? -eq 0 ]]; then
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echo "Bridge interface $BR_NAME already exists"
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exit 0
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fi
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BR_IP=$(ip addr show $INTERFACE | awk '/inet / {print $2}')
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echo "Setting up interface $BR_NAME IP: $BR_IP on $INTERFACE"
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ip link add name $BR_NAME type bridge
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ip link set $INTERFACE master $BR_NAME
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ip addr flush dev $INTERFACE
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ip link set $BR_NAME up
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ip addr add $BR_IP dev $BR_NAME
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fi
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