From b3b16c8ce5c616a0d1f84c4263b4067ff099aa1e Mon Sep 17 00:00:00 2001
From: Koen Vandeputte <koen.vandeputte@ncentric.com>
Date: Thu, 15 Feb 2018 15:16:03 +0100
Subject: [PATCH] uqmi: use built-in command for data-link verification

uqmi contains a command for directly querying the modem if there
is a valid data connection, so let's use it.

This avoids the cases were all previous tests are succesful, but the
actual data link is not up for some reasons, leading to states were we
thought the link was up when it actually wasn't ..

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
---
 package/network/utils/uqmi/Makefile           |  2 +-
 .../utils/uqmi/files/lib/netifd/proto/qmi.sh  | 20 ++++++++++++++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/package/network/utils/uqmi/Makefile b/package/network/utils/uqmi/Makefile
index 6e891435b9..993069e256 100644
--- 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:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(LEDE_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 bdab5ee514..c3da5ede26 100755
--- 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 dataformat connstat
 	local device apn auth username password pincode delay modes pdptype profile dhcpv6 autoconnect plmn $PROTO_DEFAULT_OPTIONS
 	local cid_4 pdh_4 cid_6 pdh_6
 	local ip_6 ip_prefix_length gateway_6 dns1_6 dns2_6
@@ -164,6 +164,15 @@ proto_qmi_setup() {
 			proto_notify_error "$interface" CALL_FAILED
 			return 1
 		fi
+
+        # Check data connection state
+		connstat=$(uqmi -s -d "$device" --get-data-status)
+                [ "$connstat" == '"connected"' ] || {
+                        echo "No data link!"
+                        uqmi -s -d "$device" --set-client-id wds,"$cid_4" --release-client-id wds
+                        proto_notify_error "$interface" CALL_FAILED
+                        return 1
+                }
 	}
 
 	[ "$pdptype" = "ipv6" -o "$pdptype" = "ipv4v6" ] && {
@@ -192,6 +201,15 @@ proto_qmi_setup() {
 			proto_notify_error "$interface" CALL_FAILED
 			return 1
 		fi
+
+        # Check data connection state
+		connstat=$(uqmi -s -d "$device" --get-data-status)
+                [ "$connstat" == '"connected"' ] || {
+                        echo "No data link!"
+                        uqmi -s -d "$device" --set-client-id wds,"$cid_6" --release-client-id wds
+                        proto_notify_error "$interface" CALL_FAILED
+                        return 1
+                }
 	}
 
 	echo "Setting up $ifname"