From 8fc2981bcd63547d9e45896a261918342e8137aa Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Sun, 31 Jul 2011 12:05:54 +0000
Subject: [PATCH] dropbear: - split port argument at the rightmost colon,
 allows binding to specific IPv6 addresses - don't use uci ipaddr var but
 resolve ifname and get addresses from it (#9853)

SVN-Revision: 27843
---
 package/dropbear/Makefile                     |  4 +--
 package/dropbear/files/dropbear.init          | 30 +++++++++++++++----
 .../patches/300-ipv6_addr_port_split.patch    | 11 +++++++
 3 files changed, 38 insertions(+), 7 deletions(-)
 create mode 100644 package/dropbear/patches/300-ipv6_addr_port_split.patch

diff --git a/package/dropbear/Makefile b/package/dropbear/Makefile
index 3fba1347ef..34f064c37f 100644
--- a/package/dropbear/Makefile
+++ b/package/dropbear/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2006-2009 OpenWrt.org
+# Copyright (C) 2006-2011 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=dropbear
 PKG_VERSION:=0.53.1
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:= \
diff --git a/package/dropbear/files/dropbear.init b/package/dropbear/files/dropbear.init
index aa7e07dd6d..d06d2d5349 100755
--- a/package/dropbear/files/dropbear.init
+++ b/package/dropbear/files/dropbear.init
@@ -12,6 +12,27 @@ EXTRA_HELP="	killclients Kill ${NAME} processes except servers and yourself"
 
 dropbear_start()
 {
+	append_ports()
+	{
+		local ifname="$1"
+		local port="$2"
+
+		grep -qs "^ *$ifname:" /proc/net/dev || {
+			append args "-p $port"
+			return
+		}
+
+		for addr in $(
+			ifconfig "$ifname" | sed -ne '
+				/addr: *fe[89ab][0-9a-f]:/d
+				s/.* addr: *\([0-9a-f:\.]*\).*/\1/p
+			'
+		); do
+			append args "-p $addr:$port"
+		done
+	}
+
+
 	local section="$1"
 
 	# check if section is enabled (default)
@@ -33,13 +54,12 @@ dropbear_start()
 	config_get_bool val "${section}" PasswordAuth 1
 	[ "${val}" -eq 0 ] && append args "-s"
 	# B) listen interface and port
+	local port
 	local interface
-	local address
 	config_get interface "${section}" Interface
-	config_get address "${interface}" ipaddr
-	config_get val "${section}" Port
-	val="${address:+${address}:}${val}"
-	[ -n "${val}" ] && append args "-p ${val}"
+	config_get interface "${interface}" ifname "$interface"
+	config_get port "${section}" Port 22
+	append_ports "$interface" "$port"
 	# C) banner file
 	config_get val "${section}" BannerFile
 	[ -f "${val}" ] && append args "-b ${val}"
diff --git a/package/dropbear/patches/300-ipv6_addr_port_split.patch b/package/dropbear/patches/300-ipv6_addr_port_split.patch
new file mode 100644
index 0000000000..7da435ab15
--- /dev/null
+++ b/package/dropbear/patches/300-ipv6_addr_port_split.patch
@@ -0,0 +1,11 @@
+--- a/svr-runopts.c
++++ b/svr-runopts.c
+@@ -325,7 +325,7 @@ static void addportandaddress(char* spec
+ 		myspec = m_strdup(spec);
+ 
+ 		/* search for ':', that separates address and port */
+-		svr_opts.ports[svr_opts.portcount] = strchr(myspec, ':');
++		svr_opts.ports[svr_opts.portcount] = strrchr(myspec, ':');
+ 
+ 		if (svr_opts.ports[svr_opts.portcount] == NULL) {
+ 			/* no ':' -> the whole string specifies just a port */