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|
#!/bin/sh
#
# Maximilian Wilhelm <max@sdn.clinic>
# -- Wed 26 Aug 2020 08:15:58 PM CEST
#
# This executor is responsible for setting up the main B.A.T.M.A.N. adv. interface (eg. bat0)
# as well as managing settings of the underlying interfaces (hardifs).
#
# See interfaces-batman(5) for a list of supported options for hardifs as well as meshifs.
#
if [ "$VERBOSE" ]; then
set -x
fi
if ! which batctl >/dev/null 2>&1; then
echo "Error: batctl utility not found!" >&2
exit 1
fi
#
# Compatiblity glue: Newer versions of batctl print a deprecation
# warning when called with -m <batif>. Avoid spamming the log and
# producting SPAM by silently handling this here.
mesh_if_param="-m"
if batctl -h 2>&1 | grep -q "meshif"; then
mesh_if_param="meshif"
fi
#
# Functions to manage main B.A.T.M.A.N. adv. interface
batctl_if () {
for iface in ${IF_BATMAN_IFACES}; do
${MOCK} batctl "${mesh_if_param}" "${IFACE}" interface "$1" "${iface}"
done
}
set_meshif_options () {
# We only care for options of format IF_BATMAN_<OPTION_NAME>
env | grep '^IF_BATMAN_[A-Z0-9_]\+' | while IFS="=" read opt value; do
# Members, ignore-regex, routing-algo, and throughput_override are handled seperately
if [ "${opt}" = "IF_BATMAN_IFACES" -o \
"${opt}" = "IF_BATMAN_IFACES_IGNORE_REGEX" -o \
"${opt}" = "IF_BATMAN_ROUTING_ALGO" -o \
"${opt}" = "IF_BATMAN_THROUGHPUT_OVERRIDE" ]; then
continue
fi
# Convert options for the actual name
real_opt=$(echo "${opt}" | sed -e 's/^IF_BATMAN_\([A-Z0-9_]\+\)/\1/' | tr '[A-Z]' '[a-z]')
${MOCK} batctl "${mesh_if_param}" "${IFACE}" "${real_opt}" "${value}"
done
}
set_routing_algo () {
if [ "${IF_BATMAN_ROUTING_ALGO}" != "BATMAN_IV" -a "${IF_BATMAN_ROUTING_ALGO}" != "BATMAN_V" ]; then
echo "Invalid routing algorithm \"$1\"."
return
fi
batctl ra "${IF_BATMAN_ROUTING_ALGO}"
}
#
# Functions to manage B.A.T.M.A.N. adv. underlay interfaces (hardifs)
set_hardif_options () {
# Query hardif parameter manually for now
for hardif in ${IF_BATMAN_IFACES}; do
penalty=$(ifquery -p "batman-hop-penalty" "${hardif}")
if [ "${penalty}" ]; then
${MOCK} batctl hardif "${hardif}" hop_penalty "${penalty}"
fi
throughput=$(ifquery -p "batman-throughput-override" "${hardif}")
if [ "${throughput}" ]; then
${MOCK} batctl hardif "${hardif}" throughput_override "${througput}"
fi
done
}
case "${PHASE}" in
depend)
if [ "${IF_BATMAN_IFACES}" ]; then
echo "${IF_BATMAN_IFACES}"
fi
;;
create)
# Main B.A.T.M.A.N. adv. interface
if [ "${IF_BATMAN_IFACES}" ]; then
if [ "${IF_BATMAN_ROUTING_ALGO}" ]; then
set_routing_algo
fi
if [ ! -d "/sys/class/net/${IFACE}" ]; then
batctl "${mesh_if_param}" "${IFACE}" interface create || true
fi
fi
;;
pre-up)
# Main B.A.T.M.A.N. adv. interface (meshif)
if [ "${IF_BATMAN_IFACES}" ]; then
batctl_if add
set_meshif_options
set_hardif_options
fi
;;
destroy)
if [ "${IF_BATMAN_IFACES}" -a -d "/sys/class/net/${IFACE}" ]; then
# Newer versions of batctl provide the "interface destroy" API, try to use it
if ! batctl "${mesh_if_param}" "${IFACE}" interface destroy 2>/dev/null; then
# Fall back to old style member interface removal
batctl_if del
fi
fi
;;
*)
exit 0
;;
esac
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