openfortivpn: Use netifd for script rather than init script

By using the netifd for open fortivpn we are able to set up multiple
VPN connections and manage them through the netifd toolset.

This also adds support for binding an openfortivpn client to a given
interface, in which case when that interface comes online, the vpn
will be initiated via a hotplug script.

This is a breaking commit and configurations will need to be migrated
from openfortivpn.config into the /etc/config/networks.

Example configuration via /etc/config/network:

config interface 'ftvpn'
        option proto 'openfortivpn'
        option server 'example.com'
        option username 'USERNAME'
        option password 'PASSWORD'
        # optional arguments follow
        option local_ip '192.0.5.1'
        option port '443'
        option iface_name 'wan'
        option trusted_cert 'CERT_HASH'
        option set_dns '0'
        option pppd_use_peerdns '0'
        option metric '10'

Signed-off-by: Aaron Goodman <aaronjg@stanford.edu>

1 files changed, 139 insertions, 0 deletions

diff --git a/net/openfortivpn/files/openfortivpn.sh b/net/openfortivpn/files/openfortivpn.sh
new file mode 100755
index 000000000..d69575230
--- /dev/null
+++ b/net/openfortivpn/files/openfortivpn.sh
@@ -0,0 +1,139 @@
+#!/bin/sh
+. /lib/functions.sh
+. ../netifd-proto.sh
+init_proto "$@"
+
+append_args() {
+        while [ $# -gt 0 ]; do
+                append cmdline "'${1//\'/\'\\\'\'}'"
+                shift
+        done
+}
+
+proto_openfortivpn_init_config() {
+        proto_config_add_string "server"
+        proto_config_add_int "port"
+        proto_config_add_string "iface_name"
+        proto_config_add_string "local_ip"
+        proto_config_add_string "username"
+        proto_config_add_string "password"
+        proto_config_add_string "trusted_cert"
+        proto_config_add_int "set_dns"
+        proto_config_add_int "pppd_use_peerdns"
+        proto_config_add_int "metric"
+        no_device=1
+        available=1
+}
+
+proto_openfortivpn_setup() {
+        local config="$1"
+
+        json_get_vars host server port iface_name local_ip username password trusted_cert set_dns pppd_use_peerdns metric
+
+        ifname="vpn-$config"
+
+        logger -t openfortivpn "$config: initializing..."
+
+        [ -n "$iface_name" ] && {
+            json_load "$(ifstatus $iface_name)"
+            json_get_var iface_device_name device
+            json_get_var iface_device_up up
+        }
+
+        logger -t "openfortivpn" "$config: $iface_name is status  $iface_device_up"
+        [ "$iface_device_up" -eq 1 ] || {
+            logger -t "openfortivpn" "$config: $iface_name is not up $iface_device_up"
+            proto_notify_error "$config" "$iface_name is not up $iface_device_up"
+            proto_block_restart "$config"
+            exit 1
+        }
+
+
+        server_ip=$(resolveip -t 10 "$server")
+
+        [ $? -eq 0 ] || {
+            logger -t "openfortivpn" "$config: failed to resolve server ip for $server"
+            sleep 10
+            proto_notify_error "$config" "failed to resolve server ip for $server"
+            proto_setup_failed "$config"
+            exit 1
+        }
+
+        [ -n $iface_name ] && {
+            ping -I $iface_device_name -c 1 -w 10 $server_ip > /dev/null 2>&1 || {
+                logger -t "openfortivpn" "$config: failed to ping $server_ip on $iface_device_name"
+                sleep 10
+                proto_notify_error  "$config" "failed to ping $server_ip on $iface_device_name"
+                proto_setup_failed "$config"
+                exit 1
+            }
+        }
+
+        for ip in $(resolveip -t 10 "$server"); do
+                logger -t "openfortivpn" "$config: adding host dependency for $ip on $iface_name at $config"
+                proto_add_host_dependency "$config" "$ip" "$iface_name"
+        done
+
+
+
+        [ -n "$port" ] && port=":$port"
+
+        append_args "$server$port" --pppd-ifname="$ifname" --use-syslog  -c /dev/null
+        append_args "--set-dns=$set_dns"
+        append_args "--no-routes"
+        append_args "--pppd-use-peerdns=$pppd_use_peerdns"
+
+        [ -n "$iface_name" ] && {
+            append_args "--ifname=$iface_device_name"
+        }
+
+        [ -n "$trusted_cert" ] && append_args "--trusted-cert=$trusted_cert"
+        [ -n "$username" ] && append_args -u "$username"
+        [ -n "$password" ] && {
+                umask 077
+                mkdir -p /var/etc
+                pwfile="/var/etc/openfortivpn-$config.passwd"
+                echo "$password" > "$pwfile"
+        }
+
+        [ -n "$local_ip" ] || local_ip=192.0.2.1
+        mkdir -p '/etc/ppp/peers'
+        callfile="/etc/ppp/peers/$config"
+        echo "115200
+:$local_ip
+noipdefault
+noaccomp
+noauth
+default-asyncmap
+nopcomp
+receive-all
+defaultroute
+nodetach
+ipparam $config
+lcp-max-configure 40
+ip-up-script /lib/netifd/ppp-up
+ip-down-script /lib/netifd/ppp-down
+mru 1354"  > $callfile
+        append_args "--pppd-call=$config"
+
+        proto_export INTERFACE="$ifname"
+        logger -t openfortivpn "$config: executing 'openfortivpn $cmdline'"
+        logger -t openfortivpn "$config: metric is  $metric"
+
+        eval "proto_run_command '$config' /usr/sbin/openfortivpn-wrapper '$pwfile' $cmdline"
+
+}
+
+proto_openfortivpn_teardown() {
+        local config="$1"
+
+        pwfile="/var/etc/openfortivpn-$config.passwd"
+        callfile="/etc/ppp/peers/$config"
+
+        rm -f $pwfile
+        rm -f $callfile
+        logger -t openfortivpn "$config: bringing down openfortivpn"
+        proto_kill_command "$config" 2
+}
+
+add_protocol openfortivpn