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https://github.com/novatiq/packages.git
synced 2026-04-30 15:38:40 +01:00
Add fastd, a very small VPN daemon
This commit is contained in:
Matthias Schiffer
@@ -0,0 +1,420 @@
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#!/bin/sh /etc/rc.common
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# Copyright (C) 2012-2013 OpenWrt.org
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START=95
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EXTRA_COMMANDS="up down show_key generate_key"
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LIST_SEP="
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"
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TMP_FASTD=/tmp/fastd
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FASTD_COMMAND=/usr/bin/fastd
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section_enabled() {
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config_get_bool enabled "$1" 'enabled' 0
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[ $enabled -gt 0 ]
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}
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error() {
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echo "${initscript}:" "$@" 1>&2
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}
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get_key_instance() {
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local s="$1"
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config_get secret "$s" secret
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if [ "$secret" = 'generate' ]; then
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secret=`"$FASTD_COMMAND" --generate-key --machine-readable`
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uci -q set fastd."$s".secret="$secret" && uci -q commit fastd
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fi
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echo "$secret"
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}
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escape_string() {
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local t=${1//\\/\\\\}
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echo -n "\"${t//\"/\\\"}\""
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}
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guard_value() {
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local t=${1//[^-a-z0-9\[\].:]/}
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echo -n "$t"
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}
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guard_remote() {
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local t=${1//[^-a-zA-Z0-9\[\].:\"% ]/}
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local quotes=${t//[^\"]/}
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if [ "${#quotes}" = 0 -o "${#quotes}" = 2 ]; then
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echo -n "$t"
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fi
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}
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yes_no() {
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case "$1" in
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0|no|off|false|disabled) echo -n no;;
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*) echo -n yes;;
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esac
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}
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config_string_config='include $(escape_string "$value");'
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config_string_config_peer='include peer $(escape_string "$value");'
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config_string_config_peer_dir='include peers from $(escape_string "$value");'
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config_string_bind='bind $(guard_value "$value");'
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config_string_method='method $(escape_string "$value");'
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config_string_syslog_level='log to syslog level $(guard_value "$value");'
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config_string_mode='mode $(guard_value "$value");'
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config_string_interface='interface $(escape_string "$value");'
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config_string_mtu='mtu $(guard_value "$value");'
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config_string_peer_limit='peer limit $(guard_value "$value");'
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config_string_user='user $(escape_string "$value");'
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config_string_group='group $(escape_string "$value");'
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config_string_pmtu='pmtu $(yes_no "$value");'
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config_string_forward='forward $(yes_no "$value");'
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config_string_hide_ip_addresses='hide ip addresses $(yes_no "$value");'
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config_string_hide_mac_addresses='hide mac addresses $(yes_no "$value");'
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config_string_secure_handshakes='secure handshakes $(yes_no "$value");'
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config_string_packet_mark='packet mark $(guard_value "$value");'
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config_string_peer='peer $(escape_string "$value") {'
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config_string_peer_group='peer group $(escape_string "$value") {'
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peer_string_key='key $(escape_string "$value");'
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peer_string_float='float $(yes_no "$value");'
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peer_string_remote='remote $(guard_remote "$value");'
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generate_option() {
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local __string=$(eval echo \"\$$2\")
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local value="$1";
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eval echo "\"$__string\""
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}
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append_option() {
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local v; local len; local s="$1"; local prefix="$2"; local p="$3"
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config_get len "$s" "${p}_LENGTH"
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if [ -z "$len" ]; then
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config_get v "$s" "$p"
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[ -n "$v" ] && generate_option "$v" "${prefix}_string_${p}"
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else
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config_list_foreach "$s" "$p" generate_option "${prefix}_string_${p}"
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fi
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}
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append_options() {
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local p; local s="$1"; local prefix="$2"; shift; shift
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for p in $*; do
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append_option "$s" "$prefix" "$p"
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done
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}
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generate_config_secret() {
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echo "secret $(escape_string "$1");"
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}
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generate_peer_config() {
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local peer="$1"
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# These options are deprecated
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config_get address "$peer" address
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config_get hostname "$peer" hostname
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config_get address_family "$peer" address_family
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config_get port "$peer" port
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if [ "$address" -o "$hostname" ]; then
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if [ -z "$port" ]; then
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error "peer $peer: address or hostname, but no port given"
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return 1
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fi
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if [ "$hostname" ]; then
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generate_option peer_string_remote "$address_family \"$hostname\" port $port"
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fi
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if [ "$address" ]; then
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generate_option peer_string_remote "$address port $port"
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fi
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fi
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append_options "$peer" peer \
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key float remote
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}
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generate_single_peer_config() {
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local peer="$1"; local net="$2"
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config_get peer_net "$peer" net
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config_get peer_group "$peer" group
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[ "$net" = "$peer_net" -a "$peer_group" = '' ] || return 0
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section_enabled "$peer" || return 0
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generate_option "$peer" config_string_peer
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generate_peer_config "$peer"
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echo '}'
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}
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create_peer_config() {
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local peer="$1"; local net="$2"; local group="$3"; local path="$4"
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config_get peer_net "$peer" net
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config_get peer_group "$peer" group
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[ "$group" = "$peer_group" ] || return 0
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if [ "$net" != "$peer_net" ]; then
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[ -z "$group" ] || error "warning: the peer group of peer '$peer' doesn't match its net, the peer will be ignored"
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return 0
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fi
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section_enabled "$peer" || return 0
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generate_peer_config "$peer" >"$path/$peer"
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}
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update_peer_group() {
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local net="$1"; local group_dir="$2"; local group="$3"; local update_only="$4"
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local path="$TMP_FASTD/fastd.$net/$group_dir"
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rm -rf "$path"
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mkdir -p "$path"
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config_foreach create_peer_config 'peer' "$net" "$group" "$path"
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if [ -z "$update_only" ]; then
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generate_option "$path" config_string_config_peer_dir
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fi
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config_foreach generate_peer_group_config 'peer_group' "$net" "$group_dir" "$update_only" "$group"
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}
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generate_peer_group_config() {
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local group="$1"; local net="$2"; local group_dir="$3%$group"; local update_only="$4"; local parent="$5"
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config_get group_net "$group" net
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config_get group_parent "$group" parent
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[ "$parent" = "$group_parent" ] || return 0
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if [ "$net" != "$peer_net" ]; then
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[ -z "$parent" ] || error "warning: the parent of peer group '$group' doesn't match its net, the peer group will be ignored"
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return 0
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fi
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section_enabled "$group" || return 0
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if [ -z "$update_only" ]; then
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generate_option "$group" config_string_peer_group
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append_options "$group" config \
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config config_peer config_peer_dir peer_limit
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fi
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update_peer_group "$net" "$group_dir" "$group" "$update_only"
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if [ -z "$update_only" ]; then
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echo '}'
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fi
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}
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update_peer_groups() {
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local net="$1"; local update_only="$2"
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update_peer_group "$net" 'peers' '' "$update_only"
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}
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generate_config() {
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local s="$1"
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generate_option 'info' config_string_syslog_level
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append_options "$s" config \
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config config_peer config_peer_dir bind method syslog_level mode interface mtu peer_limit \
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user group pmtu forward hide_ip_addresses hide_mac_addresses secure_handshakes packet_mark
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config_get mode "$s" mode
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if [ "$mode" = "tun" ]; then
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config_foreach generate_single_peer_config 'peer' "$s"
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else
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update_peer_groups "$s"
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fi
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}
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generate_key_instance() {
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local s="$1"
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config_get secret "$s" secret
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if [ -z "$secret" -o "$secret" = 'generate' ]; then
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secret=`fastd --generate-key --machine-readable`
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uci -q set fastd."$s".secret="$secret" && uci -q commit fastd
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fi
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generate_config_secret "$secret" | "$FASTD_COMMAND" --config - --show-key --machine-readable
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}
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show_key_instance() {
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local s="$1"
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local secret=`get_key_instance "$s"`
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if [ -z "$secret" ]; then
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error "$s: secret is not set"
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return 1
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fi
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generate_config_secret "$secret" | "$FASTD_COMMAND" --config - --show-key --machine-readable
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}
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start_instance() {
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local s="$1"
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section_enabled "$s" || return 1
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SERVICE_PID_FILE="/var/run/fastd.$s.pid"
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config_get interface "$s" interface
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if [ -z "$interface" ]; then
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error "$s: interface is not set"
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return 1
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fi
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if ifconfig "$interface" &>/dev/null; then
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error "$s: interface '$interface' is already in use"
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return 1
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fi
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config_get mode "$s" mode
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if [ -z "$mode" ]; then
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error "$s: mode is not set"
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return 1
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fi
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local secret=`get_key_instance "$s"`
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if [ -z "$secret" ]; then
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error "$s: secret is not set"
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return 1
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fi
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rm -f "$SERVICE_PID_FILE"
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touch "$SERVICE_PID_FILE"
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config_get user "$s" user
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if [ "$user" ]; then
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chown "$user" "$SERVICE_PID_FILE"
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fi
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(generate_config_secret "$secret"; generate_config "$s") | service_start "$FASTD_COMMAND" --config - --daemon --pid-file "$SERVICE_PID_FILE"
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if ! ifconfig "$interface" >/dev/null 2>&1; then
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error "$s: startup failed"
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return 1
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fi
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config_get up "$s" up
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[ -n "$up" ] && sh -c "$up" - "$interface"
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}
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stop_instance() {
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local s="$1"
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section_enabled "$s" || return 1
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SERVICE_PID_FILE="/var/run/fastd.$s.pid"
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config_get interface "$s" interface
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if [ -z "$interface" ]; then
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error "$s: interface is not set"
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return 1
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fi
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if ! ifconfig "$interface" &>/dev/null; then
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error "$s: interface '$interface' does not exist"
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return 1
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fi
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config_get down "$s" down
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[ -n "$down" ] && sh -c "$down" - "$interface"
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service_stop "$FASTD_COMMAND"
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rm -rf "$TMP_FASTD/fastd.$s"
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}
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reload_instance() {
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local s="$1"
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section_enabled "$s" || return 1
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config_get mode "$s" mode
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[ "$mode" = "tun" ] && return 1
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update_peer_groups "$s" true
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SERVICE_PID_FILE="/var/run/fastd.$s.pid"
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service_reload "$FASTD_COMMAND"
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}
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start() {
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config_load 'fastd'
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config_foreach start_instance 'fastd'
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}
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stop() {
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config_load 'fastd'
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config_foreach stop_instance 'fastd'
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}
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reload() {
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config_load 'fastd'
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config_foreach reload_instance 'fastd'
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}
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up() {
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local exists
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local instance
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config_load 'fastd'
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for instance in "$@"; do
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config_get exists "$instance" 'TYPE'
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if [ "$exists" = 'fastd' ]; then
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start_instance "$instance"
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fi
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done
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}
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down() {
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local exists
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local instance
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config_load 'fastd'
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for instance in "$@"; do
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config_get exists "$instance" 'TYPE'
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if [ "$exists" = 'fastd' ]; then
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stop_instance "$instance"
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fi
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done
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}
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show_key() {
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local exists
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local instance
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config_load 'fastd'
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for instance in "$@"; do
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config_get exists "$instance" 'TYPE'
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if [ "$exists" = 'fastd' ]; then
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show_key_instance "$instance"
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fi
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done
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}
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generate_key() {
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local exists
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local instance
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config_load 'fastd'
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for instance in "$@"; do
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config_get exists "$instance" 'TYPE'
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if [ "$exists" = 'fastd' ]; then
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generate_key_instance "$instance"
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fi
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done
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}
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Block a user