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-rw-r--r--netlink.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/netlink.c b/netlink.c
index 7e9caf4..6c57a68 100644
--- a/netlink.c
+++ b/netlink.c
@@ -462,8 +462,21 @@ int nl_route_dup(int s_src, unsigned int ifi_src,
for (rta = RTM_RTA(rtm), na = RTM_PAYLOAD(nh); RTA_OK(rta, na);
rta = RTA_NEXT(rta, na)) {
- if (rta->rta_type == RTA_OIF)
+ if (rta->rta_type == RTA_OIF) {
+ /* The host obviously list's the host interface
+ * id here, we need to change it to the
+ * namespace's interface id
+ */
*(unsigned int *)RTA_DATA(rta) = ifi_dst;
+ } else if (rta->rta_type == RTA_PREFSRC) {
+ /* Host routes might include a preferred source
+ * address, which must be one of the host's
+ * addresses. However, with -a pasta will use a
+ * different namespace address, making such a
+ * route invalid in the namespace. Strip off
+ * RTA_PREFSRC attributes to avoid that. */
+ rta->rta_type = RTA_UNSPEC;
+ }
}
}