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path: root/zebra/kernel_socket.c
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Diffstat (limited to 'zebra/kernel_socket.c')
-rw-r--r--zebra/kernel_socket.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/zebra/kernel_socket.c b/zebra/kernel_socket.c
index 1944f9f3..e7ceea54 100644
--- a/zebra/kernel_socket.c
+++ b/zebra/kernel_socket.c
@@ -319,6 +319,7 @@ int
ifm_read (struct if_msghdr *ifm)
{
struct interface *ifp = NULL;
+ struct sockaddr_dl *sdl;
char ifname[IFNAMSIZ];
short ifnlen = 0;
caddr_t *cp;
@@ -356,6 +357,7 @@ ifm_read (struct if_msghdr *ifm)
RTA_ADDR_GET (NULL, RTA_GATEWAY, ifm->ifm_addrs, cp);
RTA_ATTR_GET (NULL, RTA_NETMASK, ifm->ifm_addrs, cp);
RTA_ADDR_GET (NULL, RTA_GENMASK, ifm->ifm_addrs, cp);
+ sdl = (struct sockaddr_dl *)cp;
RTA_NAME_GET (ifname, RTA_IFP, ifm->ifm_addrs, cp, ifnlen);
RTA_ADDR_GET (NULL, RTA_IFA, ifm->ifm_addrs, cp);
RTA_ADDR_GET (NULL, RTA_AUTHOR, ifm->ifm_addrs, cp);
@@ -454,6 +456,16 @@ ifm_read (struct if_msghdr *ifm)
#endif /* __bsdi__ */
if_get_metric (ifp);
+ /*
+ * XXX sockaddr_dl contents can be larger than the structure
+ * definition, so the user of the stored structure must be
+ * careful not to read off the end.
+ *
+ * a nonzero ifnlen from RTA_NAME_GET() means sdl is valid
+ */
+ if (ifnlen)
+ memcpy (&ifp->sdl, sdl, sizeof (struct sockaddr_dl));
+
if_add_update (ifp);
}
else