tmate-ssh-server: add package

The `tmate` tool is a fork of `tmux` which allows remote access to a
device without setting up any port forwarding. This commits adds the
backend server which handles connections.

Signed-off-by: Paul Spooren <mail@aparcar.org>

2 files changed, 71 insertions, 0 deletions

diff --git a/net/tmate-ssh-server/files/tmate-ssh-server.config b/net/tmate-ssh-server/files/tmate-ssh-server.config
new file mode 100644
index 000000000..bada5b173
--- /dev/null
+++ b/net/tmate-ssh-server/files/tmate-ssh-server.config
@@ -0,0 +1,6 @@
+config tmate-ssh-server 'main'
+	option listen_port 2222
+	option keys_dir '/etc/tmate-ssh-server/keys/'
+	# option ip '0.0.0.0'
+	# option hostname 'OpenWrt'
+	# option ssh_port_advertized 2222
diff --git a/net/tmate-ssh-server/files/tmate-ssh-server.init b/net/tmate-ssh-server/files/tmate-ssh-server.init
new file mode 100644
index 000000000..df31912f1
--- /dev/null
+++ b/net/tmate-ssh-server/files/tmate-ssh-server.init
@@ -0,0 +1,65 @@
+#!/bin/sh /etc/rc.common
+
+START=90
+STOP=10
+
+USE_PROCD=1
+PROG=/usr/bin/tmate-ssh-server
+
+generate_keys() {
+	mkdir -p "$1"
+	echo "Generating fresh keys"
+	ssh-keygen -t "rsa" -f "$1/ssh_host_rsa_key" -N '' > /dev/null
+	ssh-keygen -t "ed25519" -f "$1/ssh_host_ed25519_key" -N '' > /dev/null
+}
+
+start_service() {
+	local ip hostname keys_dir listen_port ssh_port_advertized
+	config_load "tmate-http-server"
+
+	procd_open_instance
+	procd_set_param command $PROG
+
+	config_get ip main ip
+	if [ ! -z "$ip" ]; then
+		procd_append_param command -b "$ip"
+	fi
+
+	config_get hostname main hostname "$HOSTNAME"
+	procd_append_param command -h "$hostname"
+
+	config_get keys_dir main keys_dir "/etc/tmate-ssh-server/keys/"
+	if [ ! -f "$keys_dir/ssh_host_rsa_key" ] && \
+			[ ! -f "ssh_host_ed25519_key" ]; then
+		generate_keys "$keys_dir"
+	fi
+
+	procd_append_param command -k "$keys_dir"
+
+	config_get listen_port main listen_port "2222"
+	procd_append_param command -p "$listen_port"
+
+	config_get ssh_port_advertized main ssh_port_advertized "$listen_port"
+	procd_append_param command -q "$ssh_port_advertized"
+
+	echo "You may use the following settings this in your .tmate.conf:"
+	echo ""
+	echo "set -g tmate-server-host $hostname"
+	echo "set -g tmate-server-port $ssh_port_advertized"
+	printf "set -g tmate-server-rsa-fingerprint "
+	ssh-keygen -l -E SHA256 -f "$keys_dir/ssh_host_rsa_key.pub" | \
+		cut -d ' ' -f 2
+	printf "set -g tmate-server-ed25519-fingerprint "
+	ssh-keygen -l -E SHA256 -f "$keys_dir/ssh_host_ed25519_key.pub" | \
+		cut -d ' ' -f 2
+
+	procd_set_param respawn
+	procd_set_param stdout 1
+	procd_set_param stderr 1
+
+	procd_close_instance
+}
+
+service_triggers() {
+	procd_add_reload_trigger "tmate-ssh-server"
+}