From ef98919ff02851b057428991e94e66c890e91081 Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Mon, 7 Nov 2011 01:45:04 +0000
Subject: [PATCH] busybox: ntpd: indefinitely try to resolve peer addresses
 (#10361)

SVN-Revision: 28794
---
 package/busybox/Makefile                      |  2 +-
 .../patches/610-ntpd_delayed_resolve.patch    | 48 +++++++++++++++++++
 2 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100644 package/busybox/patches/610-ntpd_delayed_resolve.patch

diff --git a/package/busybox/Makefile b/package/busybox/Makefile
index ac4218f29f..a5f154820c 100644
--- a/package/busybox/Makefile
+++ b/package/busybox/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=busybox
 PKG_VERSION:=1.19.3
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 PKG_FLAGS:=essential
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
diff --git a/package/busybox/patches/610-ntpd_delayed_resolve.patch b/package/busybox/patches/610-ntpd_delayed_resolve.patch
new file mode 100644
index 0000000000..5e17ae16c2
--- /dev/null
+++ b/package/busybox/patches/610-ntpd_delayed_resolve.patch
@@ -0,0 +1,48 @@
+--- a/networking/ntpd.c
++++ b/networking/ntpd.c
+@@ -216,6 +216,7 @@ typedef struct {
+ typedef struct {
+ 	len_and_sockaddr *p_lsa;
+ 	char             *p_dotted;
++	char             *p_hostname;
+ 	/* when to send new query (if p_fd == -1)
+ 	 * or when receive times out (if p_fd >= 0): */
+ 	int              p_fd;
+@@ -646,8 +647,9 @@ add_peers(char *s)
+ 	peer_t *p;
+ 
+ 	p = xzalloc(sizeof(*p));
+-	p->p_lsa = xhost2sockaddr(s, 123);
+-	p->p_dotted = xmalloc_sockaddr2dotted_noport(&p->p_lsa->u.sa);
++	p->p_hostname = s;
++	p->p_lsa = NULL;
++	p->p_dotted = NULL;
+ 	p->p_fd = -1;
+ 	p->p_xmt_msg.m_status = MODE_CLIENT | (NTP_VERSION << 3);
+ 	p->next_action_time = G.cur_time; /* = set_next(p, 0); */
+@@ -696,6 +698,25 @@ send_query_to_peer(peer_t *p)
+ 	 *
+ 	 * Uncomment this and use strace to see it in action:
+ 	 */
++
++	/* See if the peer hostname already resolved yet, if not, retry to resolv and return on failure */
++	if (!p->p_lsa)
++	{
++		p->p_lsa = host2sockaddr(p->p_hostname, 123);
++
++		if (p->p_lsa)
++		{
++			p->p_dotted = xmalloc_sockaddr2dotted_noport(&p->p_lsa->u.sa);
++			VERB1 bb_error_msg("resolved peer %s to %s", p->p_hostname, p->p_dotted);
++		}
++		else
++		{
++			set_next(p, RETRY_INTERVAL);
++			VERB1 bb_error_msg("could not resolve peer %s, skipping", p->p_hostname);
++			return;
++		}
++	}
++
+ #define PROBE_LOCAL_ADDR /* { len_and_sockaddr lsa; lsa.len = LSA_SIZEOF_SA; getsockname(p->query.fd, &lsa.u.sa, &lsa.len); } */
+ 
+ 	if (p->p_fd == -1) {
-- 
2.30.2