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415 lines
12 KiB
415 lines
12 KiB
#!/bin/sh
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# Copyright (C) 2016-2019 Aleksander Morgado <aleksander@aleksander.es>
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[ -x /usr/bin/mmcli ] || exit 0
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[ -x /usr/sbin/pppd ] || exit 0
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[ -n "$INCLUDE_ONLY" ] || {
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. /lib/functions.sh
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. ../netifd-proto.sh
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. ./ppp.sh
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init_proto "$@"
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}
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cdr2mask ()
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{
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# Number of args to shift, 255..255, first non-255 byte, zeroes
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set -- $(( 5 - ($1 / 8) )) 255 255 255 255 $(( (255 << (8 - ($1 % 8))) & 255 )) 0 0 0
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if [ "$1" -gt 1 ]
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then
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shift "$1"
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else
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shift
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fi
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echo "${1-0}"."${2-0}"."${3-0}"."${4-0}"
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}
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# This method expects as first argument a list of key-value pairs, as returned by mmcli --output-keyvalue
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# The second argument must be exactly the name of the field to read
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#
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# Sample output:
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# $ mmcli -m 0 -K
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# modem.dbus-path : /org/freedesktop/ModemManager1/Modem/0
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# modem.generic.device-identifier : ed6eff2e3e0f90463da1c2a755b2acacd1335752
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# modem.generic.manufacturer : Dell Inc.
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# modem.generic.model : DW5821e Snapdragon X20 LTE
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# modem.generic.revision : T77W968.F1.0.0.4.0.GC.009\n026
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# modem.generic.carrier-configuration : GCF
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# modem.generic.carrier-configuration-revision : 08E00009
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# modem.generic.hardware-revision : DW5821e Snapdragon X20 LTE
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# ....
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modemmanager_get_field() {
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local list=$1
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local field=$2
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local value=""
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[ -z "${list}" ] || [ -z "${field}" ] && return
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# there is always at least a whitespace after each key, and we use that as part of the
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# key matching we do (e.g. to avoid getting 'modem.generic.state-failed-reason' as a result
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# when grepping for 'modem.generic.state'.
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line=$(echo "${list}" | grep "${field} ")
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value=$(echo ${line#*:})
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# not found?
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[ -n "${value}" ] || return 2
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# only print value if set
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[ "${value}" != "--" ] && echo "${value}"
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return 0
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}
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# build a comma-separated list of values from the list
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modemmanager_get_multivalue_field() {
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local list=$1
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local field=$2
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local value=""
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local length idx item
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[ -z "${list}" ] || [ -z "${field}" ] && return
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length=$(modemmanager_get_field "${list}" "${field}.length")
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[ -n "${length}" ] || return 0
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[ "$length" -ge 1 ] || return 0
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idx=1
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while [ $idx -le "$length" ]; do
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item=$(modemmanager_get_field "${list}" "${field}.value\[$idx\]")
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[ -n "${item}" ] && [ "${item}" != "--" ] && {
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[ -n "${value}" ] && value="${value}, "
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value="${value}${item}"
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}
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idx=$((idx + 1))
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done
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# nothing built?
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[ -n "${value}" ] || return 2
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# only print value if set
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echo "${value}"
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return 0
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}
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modemmanager_cleanup_connection() {
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local modemstatus="$1"
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local bearercount idx bearerpath
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bearercount=$(modemmanager_get_field "${modemstatus}" "modem.generic.bearers.length")
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# do nothing if no bearers reported
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[ -n "${bearercount}" ] && [ "$bearercount" -ge 1 ] && {
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# explicitly disconnect just in case
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mmcli --modem="${device}" --simple-disconnect >/dev/null 2>&1
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# and remove all bearer objects, if any found
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idx=1
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while [ $idx -le "$bearercount" ]; do
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bearerpath=$(modemmanager_get_field "${modemstatus}" "modem.generic.bearers.value\[$idx\]")
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mmcli --modem "${device}" --delete-bearer="${bearerpath}" >/dev/null 2>&1
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idx=$((idx + 1))
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done
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}
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}
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modemmanager_connected_method_ppp() {
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local interface="$1"
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local ttyname="$2"
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local username="$3"
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local password="$4"
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proto_run_command "${interface}" /usr/sbin/pppd \
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"${ttyname}" \
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115200 \
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nodetach \
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noaccomp \
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nobsdcomp \
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nopcomp \
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novj \
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noauth \
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${username:+ user $username} \
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${password:+ password $password} \
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lcp-echo-failure 5 \
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lcp-echo-interval 15 \
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lock \
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crtscts \
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nodefaultroute \
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usepeerdns \
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ipparam "${interface}" \
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ip-up-script /lib/netifd/ppp-up \
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ip-down-script /lib/netifd/ppp-down
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}
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modemmanager_disconnected_method_ppp() {
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local interface="$1"
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echo "running disconnection (ppp method)"
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[ -n "${ERROR}" ] && {
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local errorstring
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errorstring=$(ppp_exitcode_tostring "${ERROR}")
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case "$ERROR" in
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0)
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;;
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2)
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proto_notify_error "$interface" "$errorstring"
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proto_block_restart "$interface"
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;;
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*)
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proto_notify_error "$interface" "$errorstring"
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;;
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esac
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} || echo "pppd result code not given"
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proto_kill_command "$interface"
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}
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modemmanager_connected_method_dhcp() {
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local interface="$1"
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local wwan="$2"
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local metric="$3"
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proto_init_update "${wwan}" 1
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proto_send_update "${interface}"
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json_init
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json_add_string name "${interface}_4"
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json_add_string ifname "@${interface}"
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json_add_string proto "dhcp"
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proto_add_dynamic_defaults
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[ -n "$metric" ] && json_add_int metric "${metric}"
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json_close_object
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ubus call network add_dynamic "$(json_dump)"
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}
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modemmanager_disconnected_method_dhcp() {
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local interface="$1"
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echo "running disconnection (dhcp method)"
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proto_init_update "*" 0
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proto_send_update "${interface}"
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}
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modemmanager_connected_method_static() {
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local interface="$1"
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local wwan="$2"
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local address="$3"
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local prefix="$4"
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local gateway="$5"
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local mtu="$6"
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local dns1="$7"
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local dns2="$8"
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local metric="$9"
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local mask=""
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[ -n "${address}" ] || {
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proto_notify_error "${interface}" ADDRESS_MISSING
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return
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}
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[ -n "${prefix}" ] || {
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proto_notify_error "${interface}" PREFIX_MISSING
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return
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}
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mask=$(cdr2mask "${prefix}")
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# TODO: mtu reporting in proto handler
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proto_init_update "${wwan}" 1
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echo "adding IPv4 address ${address}, netmask ${mask}"
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proto_add_ipv4_address "${address}" "${mask}"
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[ -n "${gateway}" ] && {
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echo "adding default IPv4 route via ${gateway}"
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proto_add_ipv4_route "0.0.0.0" "0" "${gateway}" "${address}"
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}
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[ -n "${dns1}" ] && {
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echo "adding primary DNS at ${dns1}"
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proto_add_dns_server "${dns1}"
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}
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[ -n "${dns2}" ] && {
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echo "adding secondary DNS at ${dns2}"
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proto_add_dns_server "${dns2}"
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}
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[ -n "$metric" ] && json_add_int metric "${metric}"
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proto_send_update "${interface}"
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}
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modemmanager_disconnected_method_static() {
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local interface="$1"
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echo "running disconnection (static method)"
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proto_init_update "*" 0
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proto_send_update "${interface}"
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}
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proto_modemmanager_init_config() {
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proto_config_add_string "device:device"
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proto_config_add_string apn
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proto_config_add_string username
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proto_config_add_string password
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proto_config_add_string pincode
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proto_config_add_string iptype
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proto_config_add_boolean lowpower
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}
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proto_modemmanager_setup() {
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local interface="$1"
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local modempath modemstatus bearercount bearerpath connectargs bearerstatus beareriface
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local operatorname operatorid registration accesstech signalquality
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local device apn username password pincode iptype metric
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local address prefix gateway mtu dns1 dns2
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json_get_vars device apn username password pincode iptype metric
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# validate sysfs path given in config
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[ -n "${device}" ] || {
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echo "No device specified"
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proto_notify_error "${interface}" NO_DEVICE
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proto_set_available "${interface}" 0
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return 1
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}
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[ -e "${device}" ] || {
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echo "Device not found in sysfs"
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proto_set_available "${interface}" 0
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return 1
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}
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# validate that ModemManager is handling the modem at the sysfs path
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modemstatus=$(mmcli --modem="${device}" --output-keyvalue)
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modempath=$(modemmanager_get_field "${modemstatus}" "modem.dbus-path")
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[ -n "${modempath}" ] || {
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echo "Device not managed by ModemManager"
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proto_notify_error "${interface}" DEVICE_NOT_MANAGED
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proto_set_available "${interface}" 0
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return 1
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}
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echo "modem available at ${modempath}"
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# always cleanup before attempting a new connection, just in case
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modemmanager_cleanup_connection "${modemstatus}"
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# setup connect args; APN mandatory (even if it may be empty)
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echo "starting connection with apn '${apn}'..."
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connectargs="apn=${apn}${username:+,user=${username}}${password:+,password=${password}}${pincode:+,pin=${pincode}}${iptype:+,ip-type=${iptype}}"
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mmcli --modem="${device}" --timeout 120 --simple-connect="${connectargs}" || {
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proto_notify_error "${interface}" CONNECT_FAILED
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proto_block_restart "${interface}"
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return 1
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}
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# log additional useful information
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modemstatus=$(mmcli --modem="${device}" --output-keyvalue)
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operatorname=$(modemmanager_get_field "${modemstatus}" "modem.3gpp.operator-name")
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[ -n "${operatorname}" ] && echo "network operator name: ${operatorname}"
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operatorid=$(modemmanager_get_field "${modemstatus}" "modem.3gpp.operator-code")
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[ -n "${operatorid}" ] && echo "network operator MCCMNC: ${operatorid}"
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registration=$(modemmanager_get_field "${modemstatus}" "modem.3gpp.registration-state")
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[ -n "${registration}" ] && echo "registration type: ${registration}"
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accesstech=$(modemmanager_get_multivalue_field "${modemstatus}" "modem.generic.access-technologies")
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[ -n "${accesstech}" ] && echo "access technology: ${accesstech}"
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signalquality=$(modemmanager_get_field "${modemstatus}" "modem.generic.signal-quality.value")
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[ -n "${signalquality}" ] && echo "signal quality: ${signalquality}%"
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# we won't like it if there are more than one bearers, as that would mean the
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# user manually created them, and that's unsupported by this proto
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bearercount=$(modemmanager_get_field "${modemstatus}" "modem.generic.bearers.length")
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[ -n "${bearercount}" ] && [ "$bearercount" -eq 1 ] || {
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proto_notify_error "${interface}" INVALID_BEARER_LIST
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return 1
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}
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# load connected bearer information
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bearerpath=$(modemmanager_get_field "${modemstatus}" "modem.generic.bearers.value\[1\]")
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bearerstatus=$(mmcli --bearer "${bearerpath}" --output-keyvalue)
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# load network interface and method information
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beareriface=$(modemmanager_get_field "${bearerstatus}" "bearer.status.interface")
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bearermethod=$(modemmanager_get_field "${bearerstatus}" "bearer.ipv4-config.method")
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echo "connection setup required in interface ${beareriface}: ${bearermethod}"
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case "${bearermethod}" in
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"dhcp")
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modemmanager_connected_method_dhcp "${interface}" "${beareriface}" "${metric}"
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;;
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"static")
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address=$(modemmanager_get_field "${bearerstatus}" "bearer.ipv4-config.address")
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prefix=$(modemmanager_get_field "${bearerstatus}" "bearer.ipv4-config.prefix")
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gateway=$(modemmanager_get_field "${bearerstatus}" "bearer.ipv4-config.gateway")
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mtu=$(modemmanager_get_field "${bearerstatus}" "bearer.ipv4-config.mtu")
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dns1=$(modemmanager_get_field "${bearerstatus}" "bearer.ipv4-config.dns.value\[1\]")
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dns2=$(modemmanager_get_field "${bearerstatus}" "bearer.ipv4-config.dns.value\[2\]")
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modemmanager_connected_method_static "${interface}" "${beareriface}" "${address}" "${prefix}" "${gateway}" "${mtu}" "${dns1}" "${dns2}" "${metric}"
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;;
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"ppp")
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modemmanager_connected_method_ppp "${interface}" "${beareriface}" "${username}" "${password}"
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;;
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*)
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proto_notify_error "${interface}" UNKNOWN_METHOD
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return 1
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;;
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esac
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return 0
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}
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proto_modemmanager_teardown() {
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local interface="$1"
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local modemstatus bearerpath errorstring
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local device lowpower
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json_get_vars device lowpower
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echo "stopping network"
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# load connected bearer information, just the first one should be ok
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modemstatus=$(mmcli --modem="${device}" --output-keyvalue)
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bearerpath=$(modemmanager_get_field "${modemstatus}" "modem.generic.bearers.value\[1\]")
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[ -n "${bearerpath}" ] || {
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echo "couldn't load bearer path"
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return
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}
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# load bearer connection method
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bearerstatus=$(mmcli --bearer "${bearerpath}" --output-keyvalue)
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bearermethod=$(modemmanager_get_field "${bearerstatus}" "bearer.ipv4-config.method")
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[ -n "${bearermethod}" ] || {
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echo "couldn't load bearer method"
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return
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}
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case "${bearermethod}" in
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"dhcp")
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modemmanager_disconnected_method_dhcp "${interface}"
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;;
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"static")
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modemmanager_disconnected_method_static "${interface}"
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;;
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"ppp")
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modemmanager_disconnected_method_ppp "${interface}"
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;;
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*)
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;;
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esac
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# disconnect
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mmcli --modem="${device}" --simple-disconnect ||
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proto_notify_error "${interface}" DISCONNECT_FAILED
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# disable
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mmcli --modem="${device}" --disable
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# low power, only if requested
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[ "${lowpower:-0}" -lt 1 ] ||
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mmcli --modem="${device}" --set-power-state-low
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}
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[ -n "$INCLUDE_ONLY" ] || {
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add_protocol modemmanager
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}
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