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27 lines
760 B
Bash
Executable File
27 lines
760 B
Bash
Executable File
#!/usr/bin/env bash
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#
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# Setup client before establishing connection
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#
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set -e
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if [[ ${#} -ne 2 ]]; then
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echo "Usage: ${0} TUNNEL_ID IP_BASE"
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exit 1
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fi
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declare -r TUNNEL_ID=${1}
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declare -r IP_BASE=${2}
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declare -r NETWORK_DEVICE=tun${TUNNEL_ID}
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let CLIENT_LAST_IP_ADDR_OCTET="4*(${TUNNEL_ID}-1)+1"
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let SERVER_LAST_IP_ADDR_OCTET="4*(${TUNNEL_ID}-1)+2"
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declare -r CLIENT_IP_ADDR=${IP_BASE}.${CLIENT_LAST_IP_ADDR_OCTET}
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declare -r SERVER_IP_ADDR=${IP_BASE}.${SERVER_LAST_IP_ADDR_OCTET}
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if [[ ! $(sudo ip link | grep " ${NETWORK_DEVICE}: ") ]]; then
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sudo modprobe tun
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sudo ip tuntap add mode tun user ${USER} ${NETWORK_DEVICE}
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sudo ip link set ${NETWORK_DEVICE} up
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sudo ip addr add ${CLIENT_IP_ADDR}/32 peer ${SERVER_IP_ADDR} dev ${NETWORK_DEVICE}
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fi
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