xl2tpd: fix invoking xl2tpd-control

Upstream commit 90884c62 ("xl2tpd-control refactoring") introduced in
1.3.16 changed command names

The l2tp protocol handler part was from @danvd in pull request
openwrt/packages#13866

Fixes f07319d6 ("xl2tpd: bump to version 1.3.16")

Ref: https://github.com/openwrt/packages/pull/13866
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

net/xl2tpd/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=xl2tpd
 PKG_VERSION:=1.3.16
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 PKG_MAINTAINER:=Yousong Zhou <yszhou4tech@gmail.com>
 PKG_LICENSE:=GPL-2.0
 PKG_LICENSE_FILES:=LICENSE

net/xl2tpd/files/l2tp.sh

@@ -88,12 +88,12 @@ $mtu
 $pppd_options
 EOF
 
-	xl2tpd-control add l2tp-${interface} pppoptfile=${optfile} lns=${server} || {
+	xl2tpd-control add-lac l2tp-${interface} pppoptfile=${optfile} lns=${server} || {
 		echo "xl2tpd-control: Add l2tp-$interface failed" >&2
 		proto_setup_failed "$interface"
 		exit 1
 	}
-	xl2tpd-control connect l2tp-${interface} || {
+	xl2tpd-control connect-lac l2tp-${interface} || {
 		echo "xl2tpd-control: Connect l2tp-$interface failed" >&2
 		proto_setup_failed "$interface"
 		exit 1
@@ -106,7 +106,7 @@ proto_l2tp_teardown() {
 
 	rm -f ${optfile}
 	if [ -p /var/run/xl2tpd/l2tp-control ]; then
-		xl2tpd-control remove l2tp-${interface} || {
+		xl2tpd-control remove-lac l2tp-${interface} || {
 			echo "xl2tpd-control: Remove l2tp-$interface failed" >&2
 		}
 	fi

net/xl2tpd/patches/0001-xl2tpd-control-fix-out-of-bound-access.patch

@@ -0,0 +1,26 @@
+From f94ffac18ddfe72b00ec849a34c71d6bc5bcb767 Mon Sep 17 00:00:00 2001
+From: Yousong Zhou <yszhou4tech@gmail.com>
+Date: Thu, 12 Nov 2020 14:31:23 +0800
+Subject: [PATCH] xl2tpd-control: fix out-of-bound access
+
+It can cause segfault when presented with unknown command name
+
+Fixes 90884c62 ("xl2tpd-control refactoring")
+---
+ xl2tpd-control.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/xl2tpd-control.c b/xl2tpd-control.c
+index 1e87c93..d1df0f6 100644
+--- a/xl2tpd-control.c
++++ b/xl2tpd-control.c
+@@ -83,7 +83,8 @@ struct command_t commands[] = {
+     {"available",     &command_available,     TUNNEL_NOT_REQUIRED},
+     {"add-lns",       &command_add_lns,       TUNNEL_REQUIRED},
+     {"status-lns",    &command_status_lns,    TUNNEL_REQUIRED},
+-    {"remove-lns",    &command_remove_lns,    TUNNEL_REQUIRED}
++    {"remove-lns",    &command_remove_lns,    TUNNEL_REQUIRED},
++    {},
+ };
+ 
+ void usage()

net/xl2tpd/patches/0002-xl2tpd-control-fix-typo-in-usage.patch

@@ -0,0 +1,22 @@
+From 06bd6af97055071be5ed0f83a808032688a503db Mon Sep 17 00:00:00 2001
+From: Yousong Zhou <yszhou4tech@gmail.com>
+Date: Thu, 12 Nov 2020 14:33:05 +0800
+Subject: [PATCH] xl2tpd-control: fix typo in usage
+
+---
+ xl2tpd-control.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/xl2tpd-control.c b/xl2tpd-control.c
+index d1df0f6..2e683c8 100644
+--- a/xl2tpd-control.c
++++ b/xl2tpd-control.c
+@@ -96,7 +96,7 @@ void usage()
+             "   --help  show this help message\n\n"
+             "List of supported commands:\n"
+             "add-lac, status-lac, remove-lac, connect-lac, disconnect-lac\n"
+-            "add-lns, status-lns, remove-lns, avaliable\n\n"
++            "add-lns, status-lns, remove-lns, available\n\n"
+             "See xl2tpd-control(8) man page for more details.\n");
+ }
+