busybox: add upstream patch to fix send_to_from

This fixes ntpd when queries are sent to secondary IPv4 IP addresses.
See https://bugs.busybox.net/show_bug.cgi?id=9146

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

diff --git a/package/utils/busybox/Makefile b/package/utils/busybox/Makefile
index 37b8c1445cbbd800399f7df3e429ac96d18045ab..f602afe335e8024e297b3ed000e59f7869575d8c 100644 (file)
--- a/package/utils/busybox/Makefile
+++ b/package/utils/busybox/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=busybox
 PKG_VERSION:=1.25.1
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 PKG_FLAGS:=essential
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2

diff --git a/package/utils/busybox/patches/002-libbb-send_to_from-do-not-require-that-to-should-hav.patch b/package/utils/busybox/patches/002-libbb-send_to_from-do-not-require-that-to-should-hav.patch
new file mode 100644 (file)
index 0000000..f33c3b2
--- /dev/null
+++ b/package/utils/busybox/patches/002-libbb-send_to_from-do-not-require-that-to-should-hav.patch
@@ -0,0 +1,37 @@
+From 7cef4817d6d6d61a1166ed7dfc13537b95c65970 Mon Sep 17 00:00:00 2001
+From: Denys Vlasenko <vda.linux@googlemail.com>
+Date: Thu, 15 Sep 2016 13:20:51 +0200
+Subject: [PATCH] libbb:/send_to_from: do not require that "to" should have the
+ same AF. Closes 9146
+
+Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
+---
+ libbb/udp_io.c | 10 ++++++++--
+ 1 file changed, 8 insertions(+), 2 deletions(-)
+
+--- a/libbb/udp_io.c
++++ b/libbb/udp_io.c
+@@ -70,7 +70,13 @@ send_to_from(int fd, void *buf, size_t l
+       msg.msg_flags = flags;
+ 
+       cmsgptr = CMSG_FIRSTHDR(&msg);
+-      if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
++      /*
++       * Users report that to->sa_family can be AF_INET6 too,
++       * if "to" was acquired by recv_from_to(). IOW: recv_from_to()
++       * was seen showing IPv6 "from" even when the destination
++       * of received packet (our local address) was IPv4.
++       */
++      if (/* to->sa_family == AF_INET && */ from->sa_family == AF_INET) {
+               struct in_pktinfo *pktptr;
+               cmsgptr->cmsg_level = IPPROTO_IP;
+               cmsgptr->cmsg_type = IP_PKTINFO;
+@@ -86,7 +92,7 @@ send_to_from(int fd, void *buf, size_t l
+               pktptr->ipi_spec_dst = ((struct sockaddr_in*)from)->sin_addr;
+       }
+ # if ENABLE_FEATURE_IPV6 && defined(IPV6_PKTINFO)
+-      else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
++      else if (/* to->sa_family == AF_INET6 && */ from->sa_family == AF_INET6) {
+               struct in6_pktinfo *pktptr;
+               cmsgptr->cmsg_level = IPPROTO_IPV6;
+               cmsgptr->cmsg_type = IPV6_PKTINFO;