Pull post-4.4BSD change to sys/net/route.c from BSD/OS 4.2.

Have sys/net/route.c:rtrequest1(), which takes ``rt_addrinfo *''
as the argument.  Pass rt_addrinfo all the way down to rtrequest1
and ifa->ifa_rtrequest.  3rd argument of ifa->ifa_rtrequest is now
``rt_addrinfo *'' instead of ``sockaddr *'' (almost noone is
using it anyways).

Benefit: the following command now works.  Previously we needed
two route(8) invocations, "add" then "change".
# route add -inet6 default ::1 -ifp gif0

Remove unsafe typecast in rtrequest(), from ``rtentry *'' to
``sockaddr *''.  It was introduced by 4.3BSD-Reno and never
corrected.

Obtained from:	BSD/OS, NetBSD
MFC after:	1 month
PR:		kern/28360

1 files changed, 5 insertions, 0 deletions

diff --git a/sys/net/route.h b/sys/net/route.h
index ae3753b..1a38ceb 100644
--- a/sys/net/route.h
+++ b/sys/net/route.h
@@ -248,6 +248,9 @@ struct rt_msghdr {
 struct rt_addrinfo {
 	int	rti_addrs;
 	struct	sockaddr *rti_info[RTAX_MAX];
+	int	rti_flags;
+	struct	ifaddr *rti_ifa;
+	struct	ifnet *rti_ifp;
 };
 
 struct route_cb {
@@ -273,6 +276,7 @@ extern struct radix_node_head *rt_tables[AF_MAX+1];
 struct ifmultiaddr;
 
 void	 route_init __P((void));
+int	 rt_getifa __P((struct rt_addrinfo *));
 void	 rt_ifmsg __P((struct ifnet *));
 void	 rt_missmsg __P((int, struct rt_addrinfo *, int, int));
 void	 rt_newaddrmsg __P((int, struct ifaddr *, int, struct rtentry *));
@@ -290,6 +294,7 @@ void	 rtredirect __P((struct sockaddr *, struct sockaddr *,
 	    struct sockaddr *, int, struct sockaddr *, struct rtentry **));
 int	 rtrequest __P((int, struct sockaddr *,
 	    struct sockaddr *, struct sockaddr *, int, struct rtentry **));
+int	 rtrequest1 __P((int, struct rt_addrinfo *, struct rtentry **));
 #endif
 
 #endif