[zebra 14631] Generic PtP and RFC3021 interface addressing support
diff --git a/zebra/rt_netlink.c b/zebra/rt_netlink.c
index fa4dc54..1e39d8a 100644
--- a/zebra/rt_netlink.c
+++ b/zebra/rt_netlink.c
@@ -388,6 +388,7 @@
void *broad = NULL;
u_char flags = 0;
char *label = NULL;
+ int peeronly = 0;
ifa = NLMSG_DATA (h);
@@ -416,40 +417,51 @@
return -1;
}
- if (tb[IFA_ADDRESS] == NULL)
- tb[IFA_ADDRESS] = tb[IFA_LOCAL];
-
- if (ifp->flags & IFF_POINTOPOINT)
+ if (IS_ZEBRA_DEBUG_KERNEL) /* remove this line to see initial ifcfg */
{
+ char buf[BUFSIZ];
+ zlog_info ("netlink_interface_addr %s %s/%d:",
+ lookup (nlmsg_str, h->nlmsg_type),
+ ifp->name, ifa->ifa_prefixlen);
if (tb[IFA_LOCAL])
- {
- addr = RTA_DATA (tb[IFA_LOCAL]);
- if (tb[IFA_ADDRESS])
- broad = RTA_DATA (tb[IFA_ADDRESS]);
- else
- broad = NULL;
- }
- else
- {
- if (tb[IFA_ADDRESS])
- addr = RTA_DATA (tb[IFA_ADDRESS]);
- else
- addr = NULL;
- }
- }
- else
- {
+ zlog_info (" IFA_LOCAL %s", inet_ntop (ifa->ifa_family,
+ RTA_DATA (tb[IFA_LOCAL]), buf, BUFSIZ));
if (tb[IFA_ADDRESS])
- addr = RTA_DATA (tb[IFA_ADDRESS]);
- else
- addr = NULL;
-
+ zlog_info (" IFA_ADDRESS %s", inet_ntop (ifa->ifa_family,
+ RTA_DATA (tb[IFA_ADDRESS]), buf, BUFSIZ));
if (tb[IFA_BROADCAST])
- broad = RTA_DATA(tb[IFA_BROADCAST]);
- else
- broad = NULL;
+ zlog_info (" IFA_BROADCAST %s", inet_ntop (ifa->ifa_family,
+ RTA_DATA (tb[IFA_BROADCAST]), buf, BUFSIZ));
+ if (tb[IFA_LABEL] && strcmp (ifp->name, RTA_DATA (tb[IFA_LABEL])))
+ zlog_info (" IFA_LABEL %s", RTA_DATA (tb[IFA_LABEL]));
}
+ /* peer or broadcast network? */
+ if (ifa->ifa_family == AF_INET)
+ peeronly = if_is_pointopoint (ifp) ||
+ ifa->ifa_prefixlen >= IPV4_MAX_PREFIXLEN - 1;
+#ifdef HAVE_IPV6
+ if (ifa->ifa_family == AF_INET6)
+ peeronly = if_is_pointopoint (ifp) ||
+ ifa->ifa_prefixlen >= IPV6_MAX_PREFIXLEN - 1;
+#endif /* HAVE_IPV6*/
+
+ /* network. prefixlen applies to IFA_ADDRESS rather than IFA_LOCAL */
+ if (tb[IFA_ADDRESS] && !peeronly)
+ addr = RTA_DATA (tb[IFA_ADDRESS]);
+ else if (tb[IFA_LOCAL])
+ addr = RTA_DATA (tb[IFA_LOCAL]);
+ else
+ addr = NULL;
+
+ /* broadcast/peer */
+ if (tb[IFA_BROADCAST])
+ broad = RTA_DATA (tb[IFA_BROADCAST]);
+ else if (tb[IFA_ADDRESS] && peeronly)
+ broad = RTA_DATA (tb[IFA_ADDRESS]); /* peer address specified */
+ else
+ broad = NULL;
+
/* Flags. */
if (ifa->ifa_flags & IFA_F_SECONDARY)
SET_FLAG (flags, ZEBRA_IFA_SECONDARY);