Author: glebius
Date: Tue Nov 5 07:36:17 2013
New Revision: 257690
URL: http://svnweb.freebsd.org/changeset/base/257690
Log:
In complemence to ifa_add_loopback_route() and ifa_del_loopback_route()
provide function ifa_switch_loopback_route() that will be used in case when
an interface address used for a loopback route goes away, but we have another
interface address with same address value and want to preserve loopback
route.
Sponsored by: Netflix
Sponsored by: Nginx, Inc.
Modified:
head/sys/net/if.c
head/sys/net/if_var.h
Modified: head/sys/net/if.c
==============================================================================
--- head/sys/net/if.c Tue Nov 5 07:32:09 2013 (r257689)
+++ head/sys/net/if.c Tue Nov 5 07:36:17 2013 (r257690)
@@ -1525,6 +1525,25 @@ ifa_del_loopback_route(struct ifaddr *if
return (error);
}
+int
+ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *sa)
+{
+ struct rtentry *rt;
+
+ rt = rtalloc1_fib(sa, 0, 0, 0);
+ if (rt == NULL) {
+ log(LOG_DEBUG, "%s: fail", __func__);
+ return (EHOSTUNREACH);
+ }
+ ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type =
+ ifa->ifa_ifp->if_type;
+ ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index =
+ ifa->ifa_ifp->if_index;
+ RTFREE_LOCKED(rt);
+
+ return (0);
+}
+
/*
* XXX: Because sockaddr_dl has deeper structure than the sockaddr
* structs used to represent other address families, it is necessary
Modified: head/sys/net/if_var.h
==============================================================================
--- head/sys/net/if_var.h Tue Nov 5 07:32:09 2013 (r257689)
+++ head/sys/net/if_var.h Tue Nov 5 07:36:17 2013 (r257690)
@@ -502,6 +502,7 @@ struct ifnet *ifunit_ref(const char *);
int ifa_add_loopback_route(struct ifaddr *, struct sockaddr *);
int ifa_del_loopback_route(struct ifaddr *, struct sockaddr *);
+int ifa_switch_loopback_route(struct ifaddr *, struct sockaddr *);
struct ifaddr *ifa_ifwithaddr(struct sockaddr *);
int ifa_ifwithaddr_check(struct sockaddr *);
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