rework dns handling with all its cosequences...

we know have both a "server" and "servers" keyword. they differ when the
hostname resolves to more than one IP, server picks one and servers expands
to all.
that means no longer stuffing a sockaddr_storage into ntp_peer but a pointer
to a linked list of ntp_addr structs.
in the "servers" case the list of n addresses returned by host() is expanded
into n ntp_peer structs and thus n individual peers.
in the "server" case the whole list is attached to ntp_peer, and whenever we
do not receive a reply in time we traverse the list one further, so that
hosts with both AAAA and A records are first tried with the AAAA one but
we gracefully fall back to the A one.
semantics with theo; hacked up on the Montreal->Frankfurt flight.
again Air Canada surprised me, that older 767 hat pretty decent seats.

1 files changed, 4 insertions, 2 deletions

diff --git a/usr.sbin/ntpd/ntpd.h b/usr.sbin/ntpd/ntpd.h
index a24a007d3dd..c76d62b06fd 100644
--- a/usr.sbin/ntpd/ntpd.h
+++ b/usr.sbin/ntpd/ntpd.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ntpd.h,v 1.18 2004/07/08 01:22:57 henning Exp $ */
+/*	$OpenBSD: ntpd.h,v 1.19 2004/07/09 10:53:33 henning Exp $ */
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -76,7 +76,8 @@ struct ntp_offset {
 
 struct ntp_peer {
 	TAILQ_ENTRY(ntp_peer)		 entry;
-	struct sockaddr_storage		 ss;
+	struct ntp_addr			*addr_head;
+	struct ntp_addr			*addr;
 	struct ntp_query		*query;
 	enum client_state		 state;
 	time_t				 next;
@@ -197,6 +198,7 @@ int	server_dispatch(int fd);
 
 /* client.c */
 int	client_peer_init(struct ntp_peer *);
+int	client_nextaddr(struct ntp_peer *);
 int	client_query(struct ntp_peer *);
 int	client_dispatch(struct ntp_peer *);