From 0be14c622b809e7d3551c21e7ac6dbae6b0403f8 Mon Sep 17 00:00:00 2001
From: Lech Perczak <lech.perczak@gmail.com>
Date: Tue, 15 Feb 2022 01:44:32 +0100
Subject: [PATCH] umbim: connect session for only the selected PDP type

Previous implementation automatically set up connections for both IPv4
and IPv6, even if one of them isn't supported. Respect the "pdptype"
option in the same way, as it is done for QMI or NCM, and only start the
respective PDN sessions, if set.

Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
---
 .../umbim/files/lib/netifd/proto/mbim.sh      | 108 ++++++++++--------
 1 file changed, 60 insertions(+), 48 deletions(-)

diff --git a/package/network/utils/umbim/files/lib/netifd/proto/mbim.sh b/package/network/utils/umbim/files/lib/netifd/proto/mbim.sh
index 492e06829deb..08f95ddc6f20 100755
--- a/package/network/utils/umbim/files/lib/netifd/proto/mbim.sh
+++ b/package/network/utils/umbim/files/lib/netifd/proto/mbim.sh
@@ -20,6 +20,7 @@ proto_mbim_init_config() {
 	proto_config_add_string username
 	proto_config_add_string password
 	proto_config_add_boolean dhcp
+	proto_config_add_string pdptype
 	proto_config_add_defaults
 }
 
@@ -28,8 +29,8 @@ _proto_mbim_setup() {
 	local tid=2
 	local ret
 
-	local device apn pincode delay allow_roaming allow_partner dhcp $PROTO_DEFAULT_OPTIONS
-	json_get_vars device apn pincode delay auth username password allow_roaming allow_partner dhcp $PROTO_DEFAULT_OPTIONS
+	local device apn pincode delay allow_roaming allow_partner dhcp pdptype $PROTO_DEFAULT_OPTIONS
+	json_get_vars device apn pincode delay auth username password allow_roaming allow_partner dhcp pdptype $PROTO_DEFAULT_OPTIONS
 
 	[ -n "$ctl_device" ] && device=$ctl_device
 
@@ -147,8 +148,11 @@ _proto_mbim_setup() {
 	}
 	tid=$((tid + 1))
 
+	pdptype=$(echo "$pdptype" | awk '{print tolower($0)}')
+	[ "$pdptype" = "ipv4" -o "$pdptype" = "ipv6" -o "$pdptype" = "ipv4v6" ] || pdptype="ipv4v6"
+
 	echo "mbim[$$]" "Connect to network"
-	while ! umbim $DBG -n -t $tid -d $device connect "$apn" "$auth" "$username" "$password"; do
+	while ! umbim $DBG -n -t $tid -d $device connect "$pdptype:$apn" "$auth" "$username" "$password"; do
 		tid=$((tid + 1))
 		sleep 1;
 	done
@@ -164,56 +168,64 @@ _proto_mbim_setup() {
 		proto_init_update "$ifname" 1
 		proto_send_update "$interface"
 
-		json_init
-		json_add_string name "${interface}_4"
-		json_add_string ifname "@$interface"
-		json_add_string proto "static"
-		json_add_array ipaddr
-		json_add_string "" "$ipv4address"
-		json_close_array
-		json_add_string gateway "$ipv4gateway"
-		json_add_array dns
-		json_add_string "" "$ipv4dnsserver"
-		json_close_array
-		proto_add_dynamic_defaults
-		json_close_object
-		ubus call network add_dynamic "$(json_dump)"
-
-		json_init
-		json_add_string name "${interface}_6"
-		json_add_string ifname "@$interface"
-		json_add_string proto "static"
-		json_add_array ip6addr
-		json_add_string "" "$ipv6address"
-		json_close_array
-		json_add_string ip6gw "$ipv6gateway"
-		json_add_array dns
-		json_add_string "" "$ipv6dnsserver"
-		json_close_array
-		proto_add_dynamic_defaults
-		json_close_object
-		ubus call network add_dynamic "$(json_dump)"
+		[ "$pdptype" = "ipv4" -o "$pdptype" = "ipv4v6" ] && {
+			json_init
+			json_add_string name "${interface}_4"
+			json_add_string ifname "@$interface"
+			json_add_string proto "static"
+			json_add_array ipaddr
+			json_add_string "" "$ipv4address"
+			json_close_array
+			json_add_string gateway "$ipv4gateway"
+			json_add_array dns
+			json_add_string "" "$ipv4dnsserver"
+			json_close_array
+			proto_add_dynamic_defaults
+			json_close_object
+			ubus call network add_dynamic "$(json_dump)"
+		}
+
+		[ "$pdptype" = "ipv6" -o "$pdptype" = "ipv4v6" ] && {
+			json_init
+			json_add_string name "${interface}_6"
+			json_add_string ifname "@$interface"
+			json_add_string proto "static"
+			json_add_array ip6addr
+			json_add_string "" "$ipv6address"
+			json_close_array
+			json_add_string ip6gw "$ipv6gateway"
+			json_add_array dns
+			json_add_string "" "$ipv6dnsserver"
+			json_close_array
+			proto_add_dynamic_defaults
+			json_close_object
+			ubus call network add_dynamic "$(json_dump)"
+		}
 	else
 		echo "mbim[$$]" "Starting DHCP on $ifname"
 		proto_init_update "$ifname" 1
 		proto_send_update "$interface"
 
-		json_init
-		json_add_string name "${interface}_4"
-		json_add_string ifname "@$interface"
-		json_add_string proto "dhcp"
-		proto_add_dynamic_defaults
-		json_close_object
-		ubus call network add_dynamic "$(json_dump)"
-
-		json_init
-		json_add_string name "${interface}_6"
-		json_add_string ifname "@$interface"
-		json_add_string proto "dhcpv6"
-		json_add_string extendprefix 1
-		proto_add_dynamic_defaults
-		json_close_object
-		ubus call network add_dynamic "$(json_dump)"
+		[ "$pdptype" = "ipv4" -o "$pdptype" = "ipv4v6" ] && {
+			json_init
+			json_add_string name "${interface}_4"
+			json_add_string ifname "@$interface"
+			json_add_string proto "dhcp"
+			proto_add_dynamic_defaults
+			json_close_object
+			ubus call network add_dynamic "$(json_dump)"
+		}
+
+		[ "$pdptype" = "ipv6" -o "$pdptype" = "ipv4v6" ] && {
+			json_init
+			json_add_string name "${interface}_6"
+			json_add_string ifname "@$interface"
+			json_add_string proto "dhcpv6"
+			json_add_string extendprefix 1
+			proto_add_dynamic_defaults
+			json_close_object
+			ubus call network add_dynamic "$(json_dump)"
+		}
 	fi
 
 	uci_set_state network $interface tid "$tid"
-- 
2.30.2