kernel-netlink: Return interface name in local subnet enumerator

diff --git a/src/libcharon/plugins/kernel_netlink/kernel_netlink_net.c b/src/libcharon/plugins/kernel_netlink/kernel_netlink_net.c
index 61e0292545560626f2f79ea06bfa0e6821784316..b19bbf2f045582df5c98123f99e202a1645d8012 100644 (file)
--- a/src/libcharon/plugins/kernel_netlink/kernel_netlink_net.c
+++ b/src/libcharon/plugins/kernel_netlink/kernel_netlink_net.c
@@ -2137,6 +2137,8 @@ typedef struct {
        size_t len;
        /** last subnet enumerated */
        host_t *net;
+       /** interface of current net */
+       char ifname[IFNAMSIZ];
 } subnet_enumerator_t;
 
 METHOD(enumerator_t, destroy_subnet_enumerator, void,
@@ -2173,6 +2175,7 @@ METHOD(enumerator_t, enumerate_subnets, bool,
                                struct rtattr *rta;
                                size_t rtasize;
                                chunk_t dst = chunk_empty;
+                               uint32_t oif = 0;
 
                                msg = NLMSG_DATA(this->current);
 
@@ -2191,20 +2194,27 @@ METHOD(enumerator_t, enumerate_subnets, bool,
                                rtasize = RTM_PAYLOAD(this->current);
                                while (RTA_OK(rta, rtasize))
                                {
-                                       if (rta->rta_type == RTA_DST)
+                                       switch (rta->rta_type)
                                        {
-                                               dst = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta));
-                                               break;
+                                               case RTA_DST:
+                                                       dst = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta));
+                                                       break;
+                                               case RTA_OIF:
+                                                       if (RTA_PAYLOAD(rta) == sizeof(oif))
+                                                       {
+                                                               oif = *(uint32_t*)RTA_DATA(rta);
+                                                       }
+                                                       break;
                                        }
                                        rta = RTA_NEXT(rta, rtasize);
                                }
 
-                               if (dst.ptr)
+                               if (dst.ptr && oif && if_indextoname(oif, this->ifname))
                                {
                                        this->net = host_create_from_chunk(msg->rtm_family, dst, 0);
                                        *net = this->net;
                                        *mask = msg->rtm_dst_len;
-                                       *ifname = NULL;
+                                       *ifname = this->ifname;
                                        return TRUE;
                                }
                                break;