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Many thangs to the hard work and generous availability of: git@github.com:Misterio77/nix-config.git
52 lines
1.4 KiB
Bash
Executable file
52 lines
1.4 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Exposes a port through SSH
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# xpo [local port] [remote host] [remote port]
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#
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# Arguments:
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# - local port: defaults to 8080
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# - remote host: defaults to $XPO_SERVER
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# - remote port: defaults to randomly chosen
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#
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# Environment variables:
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# - $XPO_SERVER: server to ssh into
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# - $XPO_SSH_USER: override user used to ssh, defaults to $USER
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# - $XPO_SSH_OPTS: additional ssh options, defaults to "-A"
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socket="${XDG_RUNTIME_DIR:-/run/user/${UID:-1000}}/xpo-$BASHPID.sock"
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server="${2:-$XPO_SERVER}"
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user="${XPO_SSH_USER:-$USER}"
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l_port="${1:-8080}"
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ssh_opts="${XPO_SSH_OPTS:-"-A"}"
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# Open master ssh connection
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ssh -fTN "$ssh_opts" -MS "$socket" "$user@$server"
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echo "Forwarding :$l_port" >&2
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# If port was supplied
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if [ -n "${3:-}" ]; then
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r_port="$3"
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ssh -S "$socket" -O forward -R "*:$r_port:localhost:$l_port" xpo
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else
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# Forward port and record it
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r_port="$(ssh -S "$socket" -O forward -R "*:0:localhost:$l_port" xpo)"
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fi
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echo "$server:$r_port"
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# Open it through iptables
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echo -n "Opening $r_port on firewall... " >&2
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ssh "$ssh_opts" -t -S "$socket" xpo -- sudo iptables -I INPUT -p tcp --dport "$r_port" -j ACCEPT
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echo "done" >&2
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clean() {
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# Close it
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echo "Closing $r_port on firewall... " >&2
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ssh "$ssh_opts" -t -S "$socket" xpo -- sudo iptables -D INPUT -p tcp --dport "$r_port" -j ACCEPT
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echo "done" >&2
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# Close the ssh connection
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ssh -S "$socket" -O exit xpo
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}
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trap clean EXIT
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sleep infinity
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