Incorporate `hostapd`.

The inclusion of `hostapd` [1] brings a lot of related changes
because the build process have to extended to take the challenge.

- Convert `wpa_passthru` to a more a generic services, called
  `uds_passthru` to deal with the control socket forwarding.
  It can also log the `socat` errors properly.
- Make the `Makefile` more parametric therefore the virtual disk
  image can be customized better.
- Default configurations are now moved fully to the guest's side.
- Tweak the packages to be more flexible.
- Document everything.

[1] https://w1.fi/hostapd/

3 files changed, 153 insertions, 0 deletions

diff --git a/aports/uds_passthru/APKBUILD b/aports/uds_passthru/APKBUILD
new file mode 100644
index 0000000..41cfa4d
--- /dev/null
+++ b/aports/uds_passthru/APKBUILD
@@ -0,0 +1,26 @@
+# Maintainer: Gabor Pali <pali.gabor@gmail.com>
+
+pkgname=uds_passthru
+pkgver=0.1.0
+pkgrel=0
+pkgdesc="Unix Domain Socket pass-through for Wifibox"
+url="https://github.com/pgj/freebsd-wifibox-alpine"
+arch="all"
+license="BSD2"
+depends="socat"
+install=""
+subpackages=
+options="!check"
+arch="noarch"
+source="uds_passthru.initd
+	uds_passthru
+"
+
+package() {
+	install -D -m755 "$srcdir"/uds_passthru.initd "$pkgdir"/etc/init.d/uds_passthru
+	install -D -m755 "$srcdir"/uds_passthru "$pkgdir"/sbin/uds_passthru
+}
+sha512sums="
+efb66ffbfde79321b534c8427bbb77bbb298175fb30be8c79f21e091ed3b942d8260020996e15d62ada60de778d38d5352f4f323bd7023672b4b778e4ef1318f  uds_passthru.initd
+bc83be88e395dd73d1ba5e65d23dde045918b763b1562b3ebd17beb35e3599ca44f78dd6a732815fd6aecb0e6f8ae97ea70ef359620bf14c9ffbe88c5005ad00  uds_passthru
+"
diff --git a/aports/uds_passthru/uds_passthru b/aports/uds_passthru/uds_passthru
new file mode 100644
index 0000000..95e0931
--- /dev/null
+++ b/aports/uds_passthru/uds_passthru
@@ -0,0 +1,114 @@
+#!/bin/sh
+# shellcheck disable=SC2034,SC3043,SC3060
+
+log() {
+    local _level="$1"
+    local _message="$2"
+
+    /usr/bin/logger -p "daemon.${_level}" -t "uds_passthru[$$]" "${_message}"
+}
+
+capture_output() {
+    local _type="$1"
+    local _id="$2"
+
+    while read -r message; do
+	log "${_type}" "[${_id}] ${message}"
+    done
+}
+
+_block=
+sockets=
+network=
+
+# shellcheck disable=SC1091
+. /media/etc/uds_passthru.conf
+
+log debug "Configuration: network=${network}, sockets=[${sockets}]"
+
+if_lan=eth0
+
+terminate() {
+    local _sleep
+
+    if [ -n "${_block}" ]; then
+	log info "Received signal for termination, stopping PID ${_block}."
+	/bin/kill -KILL "${_block}"
+	log debug "Killed: $?"
+	_sleep=$(/bin/ps -o ppid,comm,pid \
+		     | /bin/grep -F "1 sleep" \
+		     | /usr/bin/head -1 \
+		     | /bin/sed "s@[ ]*1[ ]*sleep[ ]*@@")
+	log info "Stopping the orphaned sleep as PID ${_sleep}."
+	/bin/kill -KILL "${_sleep}"
+	log debug "Killed: $?"
+    else
+	log warn "Nothing is blocked, nothing to do."
+    fi
+}
+
+trap terminate TERM
+
+find_network() {
+    /sbin/ifconfig ${if_lan} \
+	| /bin/grep -F "inet addr:" \
+	| /bin/sed -E 's!.*inet addr:([0-9\.]+).*Mask:([0-9\.]+)!\1:\2!'
+}
+
+if [ -z "${network}" ]; then
+    if ! /sbin/ifconfig ${if_lan}; then
+	log error "Interface ${if_lan} not found, exiting."
+	exit 1
+    fi
+
+    network=$(find_network)
+fi
+
+_ip=${network%%:*}
+
+if [ -z "${_ip}" ]; then
+    log error "No IP address for ${if_lan} could found, exiting."
+    exit 1
+fi
+
+_socket_directory=$(/bin/mktemp -d)
+
+for s in ${sockets}; do
+    _path="${s##*path=}"
+    _path="${_path%%,*}"
+
+    if [ ! -S "${_path}" ]; then
+	log warn "${_path} is not available, skipping."
+	continue
+    fi
+
+    _socket=$(/bin/mktemp -up "${_socket_directory}")
+    _port="${s##*port=}"
+    _port="${_port%%,*}"
+
+    if [ -z "${_port}" ]; then
+        log warn "No port defined for ${_path}, skipping."
+	continue
+    fi
+
+    log info "Associating ${_ip}:${_port} (${network}) with ${_path} (${_socket})"
+    /usr/bin/socat \
+	TCP4-LISTEN:"${_port}",reuseaddr,bind="${_ip}",range="${network}",fork \
+	UNIX-SENDTO:"${_path}",bind="${_socket}",unlink-early 2>&1 \
+	| capture_output debug socat &
+done
+
+(while /bin/true; do /bin/sleep 365d; done) &
+_block=$!
+
+log info "Waiting for PID ${_block} to stop."
+wait "${_block}"
+
+_socats=$(/usr/bin/pgrep socat)
+log info "Stopping, socat processes: [${_socats}]"
+
+# shellcheck disable=SC2086
+[ -n "${_socats}" ] && /bin/kill -TERM ${_socats}
+[ -n "${_socket_directory}" ] && /bin/rm -rf "${_socket_directory}"
+
+log info "Finished."
diff --git a/aports/uds_passthru/uds_passthru.initd b/aports/uds_passthru/uds_passthru.initd
new file mode 100644
index 0000000..67f7698
--- /dev/null
+++ b/aports/uds_passthru/uds_passthru.initd
@@ -0,0 +1,13 @@
+#!/sbin/openrc-run
+
+supervisor=supervise-daemon
+name="Unix Domain Socket pass-through"
+description="Unix Domain Socket pass-through support"
+
+command=/sbin/uds_passthru
+command_background=true
+
+depend() {
+	need net
+	after firewall
+}