forked from ahurac/dotfiles
58 lines
1 KiB
Bash
Executable file
58 lines
1 KiB
Bash
Executable file
#!/bin/bash
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error() {
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>&2 printf '\033[1;31mERROR:\033[0m \033[1m%s\033[0m\n' "$error"
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return "$1"
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}
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error_null_arg() {
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local error
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error="Variable \"${1}\" can't be null"
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error 1
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}
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parse_variable() {
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! :
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}
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# Parser les variables
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trap error_null_arg EXIT
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set -e
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ssh_host="$1"
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shift
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parse_variable ssh_host "$1" 'SSH host'
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parse_variable local_port 'local port'
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parse_variable distant_port 'distant port'
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trap - EXIT
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set +e
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# Lancer la redirection SSH
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start_forwarding() {
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ssh \
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-f -N \
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-L "${local_port}:${target}:${distant_port}" \
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"$@" \
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"$ssh_host"
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}
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# Supprimer la redirection SSH
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stop_forwarding() {
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start_forwarding -O cancel
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}
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# Retourner 0 si le port de la redirection est déjà utilisé par SSH
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is_forwarding_active() {
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lsof -i -P -n \
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| awk '($1 == "ssh" && $10 == "(LISTEN)") { print $9 }' \
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| sed 's/.*://' | sort | uniq | grep -q "$local_port"
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}
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# Branchement principal
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if ! is_forwarding_active; then
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start_forwarding
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else
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stop_forwarding
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fi
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