diff options
| author |   John Lo <loj@cisco.com> | 2018-06-11 20:14:49 -0400 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2018-06-14 16:03:42 +0000 |
| commit | 8637634d4dbc3e8cc90f78307d2069524b8f8f5e (patch) | |
| tree | a0fc3028dc838cecad6179453fdb72c01be47f2a /src/vnet/ip/ip4_forward.c | |
| parent | c553ec20fed9715f0b70b71fca23caac42a1226a (diff) | |
Use unicast DMAC for IP neighbor pool refresh probes
Change-Id: I12fbebd1d24c37dc77c147773ea522c8a4b7b99d
Signed-off-by: John Lo <loj@cisco.com>
Diffstat (limited to 'src/vnet/ip/ip4_forward.c')
| -rw-r--r-- | src/vnet/ip/ip4_forward.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c index 3444eb88b7c..0035cc8a552 100644 --- a/src/vnet/ip/ip4_forward.c +++ b/src/vnet/ip/ip4_forward.c @@ -1918,7 +1918,8 @@ VLIB_INIT_FUNCTION (arp_notrace_init); /* Send an ARP request to see if given destination is reachable on given interface. */ clib_error_t * -ip4_probe_neighbor (vlib_main_t * vm, ip4_address_t * dst, u32 sw_if_index) +ip4_probe_neighbor (vlib_main_t * vm, ip4_address_t * dst, u32 sw_if_index, + u8 refresh) { vnet_main_t *vnm = vnet_get_main (); ip4_main_t *im = &ip4_main; @@ -1931,6 +1932,7 @@ ip4_probe_neighbor (vlib_main_t * vm, ip4_address_t * dst, u32 sw_if_index) vlib_buffer_t *b; adj_index_t ai; u32 bi = 0; + u8 unicast_rewrite = 0; si = vnet_get_sw_interface (vnm, sw_if_index); @@ -1988,14 +1990,24 @@ ip4_probe_neighbor (vlib_main_t * vm, ip4_address_t * dst, u32 sw_if_index) /* Peer has been previously resolved, retrieve glean adj instead */ if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE) { - adj_unlock (ai); - ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP4, - VNET_LINK_IP4, sw_if_index, &nh); - adj = adj_get (ai); + if (refresh) + unicast_rewrite = 1; + else + { + adj_unlock (ai); + ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP4, + VNET_LINK_IP4, sw_if_index, &nh); + adj = adj_get (ai); + } } /* Add encapsulation string for software interface (e.g. ethernet header). */ vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t)); + if (unicast_rewrite) + { + u16 *etype = vlib_buffer_get_current (b) - 2; + etype[0] = clib_host_to_net_u16 (ETHERNET_TYPE_ARP); + } vlib_buffer_advance (b, -adj->rewrite_header.data_bytes); { |