comgt-ncm: do not attempt to connect if the control device is invalid
After a hardware reconnect, the control device might be unavailable and attempting to interact with it will lead to hanging gcom calls, leaving the protocol setup in an unrecoverable state. Change the protocol handler to bail out early and notify netifd if the control device is not defined or if the underlying device node does not exist. Also ensure that the "disconnect", "connect" and "setmode" commands are actually defined before trying to invoke them. Finally attempt to re-query the device manufacturer if it is unset in the interface state in order to prevent UNUPPORTED_MODEM errors after a modem hardware reconnect. Signed-off-by: Rozhuk Ivan <rozhuk.im@gmail.com> [reword subject and commit message] Ref: https://github.com/openwrt/openwrt/pull/2352 Signed-off-by: Jo-Philipp Wich <jo@mein.io>
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@ -74,7 +74,7 @@ proto_ncm_setup() {
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[ -n "$delay" ] && sleep "$delay"
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manufacturer=$(gcom -d "$device" -s /etc/gcom/getcardinfo.gcom | awk 'NF && $0 !~ /AT\+CGMI/ { sub(/\+CGMI: /,""); print tolower($1); exit; }')
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[ $? -ne 0 ] && {
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[ $? -ne 0 -o -z "$manufacturer" ] && {
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echo "Failed to get modem information"
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proto_notify_error "$interface" GETINFO_FAILED
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return 1
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@ -88,6 +88,7 @@ proto_ncm_setup() {
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proto_set_available "$interface" 0
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return 1
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}
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json_get_values initialize initialize
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for i in $initialize; do
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eval COMMAND="$i" gcom -d "$device" -s /etc/gcom/runcommand.gcom || {
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@ -119,22 +120,26 @@ proto_ncm_setup() {
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[ -n "$mode" ] && {
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json_select modes
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json_get_var setmode "$mode"
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echo "Setting mode"
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eval COMMAND="$setmode" gcom -d "$device" -s /etc/gcom/runcommand.gcom || {
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echo "Failed to set operating mode"
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proto_notify_error "$interface" SETMODE_FAILED
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return 1
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[ -n "$setmode" ] && {
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echo "Setting mode"
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eval COMMAND="$setmode" gcom -d "$device" -s /etc/gcom/runcommand.gcom || {
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echo "Failed to set operating mode"
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proto_notify_error "$interface" SETMODE_FAILED
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return 1
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}
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}
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json_select ..
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}
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echo "Starting network $interface"
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json_get_vars connect
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echo "Connecting modem"
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eval COMMAND="$connect" gcom -d "$device" -s /etc/gcom/runcommand.gcom || {
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echo "Failed to connect"
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proto_notify_error "$interface" CONNECT_FAILED
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return 1
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[ -n "$connect" ] && {
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echo "Connecting modem"
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eval COMMAND="$connect" gcom -d "$device" -s /etc/gcom/runcommand.gcom || {
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echo "Failed to connect"
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proto_notify_error "$interface" CONNECT_FAILED
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return 1
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}
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}
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json_get_vars finalize
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@ -182,7 +187,6 @@ proto_ncm_setup() {
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return 1
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}
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}
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}
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proto_ncm_teardown() {
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@ -195,6 +199,20 @@ proto_ncm_teardown() {
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[ -n "$ctl_device" ] && device=$ctl_device
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[ -n "$device" ] || {
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echo "No control device specified"
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proto_notify_error "$interface" NO_DEVICE
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proto_set_available "$interface" 0
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return 1
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}
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device="$(readlink -f $device)"
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[ -e "$device" ] || {
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echo "Control device not valid"
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proto_set_available "$interface" 0
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return 1
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}
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[ -n "$profile" ] || profile=1
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echo "Stopping network $interface"
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@ -202,6 +220,16 @@ proto_ncm_teardown() {
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json_load "$(ubus call network.interface.$interface status)"
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json_select data
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json_get_vars manufacturer
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[ $? -ne 0 -o -z "$manufacturer" ] && {
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# Fallback to direct detect, for proper handle device replug.
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manufacturer=$(gcom -d "$device" -s /etc/gcom/getcardinfo.gcom | awk 'NF && $0 !~ /AT\+CGMI/ { sub(/\+CGMI: /,""); print tolower($1); exit; }')
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[ $? -ne 0 -o -z "$manufacturer" ] && {
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echo "Failed to get modem information"
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proto_notify_error "$interface" GETINFO_FAILED
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return 1
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}
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json_add_string "manufacturer" "$manufacturer"
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}
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json_load "$(cat /etc/gcom/ncm.json)"
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json_select "$manufacturer" || {
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@ -211,10 +239,12 @@ proto_ncm_teardown() {
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}
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json_get_vars disconnect
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eval COMMAND="$disconnect" gcom -d "$device" -s /etc/gcom/runcommand.gcom || {
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echo "Failed to disconnect"
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proto_notify_error "$interface" DISCONNECT_FAILED
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return 1
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[ -n "$disconnect" ] && {
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eval COMMAND="$disconnect" gcom -d "$device" -s /etc/gcom/runcommand.gcom || {
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echo "Failed to disconnect"
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proto_notify_error "$interface" DISCONNECT_FAILED
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return 1
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}
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}
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proto_init_update "*" 0
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