uqmi: fix raw-ip mode for newer lte modems

Some newer LTE modems, like the MC7455 or EC25-E do not support
"802.3" mode, and will stay in "raw-ip" regardless of the mode being
set.

In this case, the driver must be informed that it should handle all
packets in raw mode. [1]

This commit fixes connectivity issues for these devices.

Before:

[ Node 5 ] udhcpc -i wwan0
udhcpc: started, v1.27.2
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover

After:

[ Node 5 ] udhcpc -i wwan0
udhcpc: started, v1.27.2
udhcpc: sending discover
udhcpc: sending select for 100.66.245.226
udhcpc: lease of 100.66.245.226 obtained, lease time 7200
udhcpc: ifconfig wwan0 100.66.245.226 netmask 255.255.255.252 broadcast
+
udhcpc: setting default routers: 100.66.245.225

[1] https://lists.freedesktop.org/archives/libqmi-
devel/2017-January/002064.html

Tested on cns3xxx using a Sierra Wireless MC7455 LTE-A

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
[bumped PKG_RELEASE]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>

diff --git a/package/network/utils/uqmi/Makefile b/package/network/utils/uqmi/Makefile
index 9c8dadabec6d5bf9b40aee0c04205cb1bcbe15a2..16e4a5a9118ea24da92269b9cff015af493d447f 100644 (file)
--- a/package/network/utils/uqmi/Makefile
+++ b/package/network/utils/uqmi/Makefile
@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=uqmi
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/uqmi.git

diff --git a/package/network/utils/uqmi/files/lib/netifd/proto/qmi.sh b/package/network/utils/uqmi/files/lib/netifd/proto/qmi.sh
index 9c953ea6975798caa69e04217ec9ae01ff9667c9..9a534d4b96d7b1f82b63f6c0497834001230ee73 100755 (executable)
--- a/package/network/utils/uqmi/files/lib/netifd/proto/qmi.sh
+++ b/package/network/utils/uqmi/files/lib/netifd/proto/qmi.sh
@@ -27,7 +27,7 @@ proto_qmi_init_config() {
 
 proto_qmi_setup() {
        local interface="$1"
-
+       local dataformat
        local device apn auth username password pincode delay modes pdptype profile dhcpv6 autoconnect plmn $PROTO_DEFAULT_OPTIONS
        local cid_4 pdh_4 cid_6 pdh_6
        local ip_6 ip_prefix_length gateway_6 dns1_6 dns2_6
@@ -99,6 +99,19 @@ proto_qmi_setup() {
 
        uqmi -s -d "$device" --set-data-format 802.3
        uqmi -s -d "$device" --wda-set-data-format 802.3
+       dataformat="$(uqmi -s -d "$device" --wda-get-data-format)"
+
+       if [ "$dataformat" = '"raw-ip"' ]; then
+
+               [ -f /sys/class/net/$ifname/qmi/raw_ip ] || {
+                       echo "Device only supports raw-ip mode but is missing this required driver attribute: /sys/class/net/$ifname/qmi/raw_ip"
+                       return 1
+               }
+
+               echo "Device does not support 802.3 mode. Informing driver of raw-ip only for $ifname .."
+               echo "Y" > /sys/class/net/$ifname/qmi/raw_ip
+       fi
+
        uqmi -s -d "$device" --sync
 
        echo "Waiting for network registration"