mirror of
https://github.com/hackerschoice/segfault.git
synced 2024-06-30 18:51:22 +00:00
139 lines
2.9 KiB
Bash
Executable File
139 lines
2.9 KiB
Bash
Executable File
#! /bin/bash
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# - Take over 10.11.0.1.
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# - Force default route to NordLynx
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TOR_GW="172.20.0.111"
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VPN_GW="172.20.0.254"
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GOOD_ROUTES+=("10.11.0.0/16")
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GOOD_ROUTES+=("10.111.0.0/16") # TOR
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GOOD_ROUTES+=("172.20.0.0/24")
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GOOD_ROUTES+=("172.20.1.0/24")
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GOOD_ROUTES+=("172.23.0.0/24")
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# https://en.wikipedia.org/wiki/Reserved_IP_addresses
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BAD_ROUTES+=("0.0.0.0/8")
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BAD_ROUTES+=("10.0.0.0/8")
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BAD_ROUTES+=("172.16.0.0/12")
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BAD_ROUTES+=("100.64.0.0/10")
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BAD_ROUTES+=("169.254.0.0/16")
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BAD_ROUTES+=("192.0.0.0/24")
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BAD_ROUTES+=("192.0.2.0/24")
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BAD_ROUTES+=("192.88.99.0/24")
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BAD_ROUTES+=("192.168.0.0/16")
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BAD_ROUTES+=("198.18.0.0/15")
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BAD_ROUTES+=("198.51.100.0/15")
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BAD_ROUTES+=("203.0.113.0/24")
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BAD_ROUTES+=("224.0.0.0/4")
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BAD_ROUTES+=("233.252.0.0/24")
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BAD_ROUTES+=("240.0.0.0/24")
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BAD_ROUTES+=("255.255.255.255/32")
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blacklist_routes()
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{
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for ip in "${GOOD_ROUTES[@]}"; do
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iptables -A FORWARD -d "$ip" -j ACCEPT
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done
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for ip in "${BAD_ROUTES[@]}"; do
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iptables -A FORWARD -d "$ip" -j REJECT
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done
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}
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devbyip()
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{
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# shellcheck disable=SC2005
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echo "$(ip addr show | grep -F "inet $1" | head)" | awk '{ print $7; }'
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}
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# Stop routing via VPN
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vpn_unset()
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{
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ip route del default via "${VPN_GW}"
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}
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# Start routing via VPN
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vpn_set()
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{
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ip route add default via "${VPN_GW}"
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}
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tor_unset()
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{
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unset IS_SET_TOR
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ip route del default via "${TOR_GW}"
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}
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tor_set()
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{
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IS_SET_TOR=1
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ip route add default via "${TOR_GW}"
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}
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monitor_failover()
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{
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# ts=$(date +%s)
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while :; do
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if [[ -n $IS_SET_TOR ]]; then
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# HERE: TOR is set
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if [[ -f /sf/run/vpn/vpn_status ]]; then
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# HERE: VPN is back
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echo -e >&2 "$(date) WARN: Switching route to VPN."
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tor_unset
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vpn_set
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fi
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else
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# HERE: TOR is NOT set
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# Run a ping test. On failure
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if [[ ! -f /sf/run/vpn/vpn_status ]]; then
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# HERE: VPN is gone
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echo -e >&2 "$(date) WARN: Switching route to TOR."
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vpn_unset
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tor_set
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fi
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fi
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sleep 5
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done
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}
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DEV="$(devbyip 10.11.)"
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[[ -z $DEV ]] && { echo -e >&2 "DEV not found. Using DEV=eth1"; DEV="eth1"; }
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DEV_GW="$(devbyip 172.20.0.)"
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[[ -z $DEV_GW ]] && { echo -e >&2 "DEV not found. Using DEV_GW=eth0"; DEV_GW="eth0"; }
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[[ -n $SF_DEBUG ]] && {
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ip link show >&2
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ip addr show >&2
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ip route show >&2
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echo >&2 "DEV=${DEV} DEV_GW=${DEV_GW}"
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}
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blacklist_routes
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ip route del default && \
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ifconfig "$DEV" 10.11.0.1/16 && \
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# MASQ all traffic because the VPN/TOR systems dont know the route back
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# to sf-guest (10.11.0.0/16).
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iptables -t nat -A POSTROUTING -o "${DEV_GW}" -j MASQUERADE && \
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# TOR traffic (10.111.0.0/16) always goes to TOR (transparent proxy)
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ip route add 10.111.0.0/16 via "${TOR_GW}" && \
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echo -e >&2 "FW: SUCCESS" && \
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/tc.sh "${DEV_GW}" "${DEV}" && \
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echo -e >&2 "TC: SUCCESS" && \
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# By default go via TOR until vpn_status exists
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tor_set
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monitor_failover
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# Sleep forever. This allows admin to attach to router
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# and muddle with Traffic Control
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# exec -a "[sf-router] sleep" sleep infinity
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ip route del default
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echo -e >&2 "FAILED to set routes"
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exit 250
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