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BRIDGE-DOMAIN:enable arp term,mac/ip learning on local ints

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we should not suppress arps on remote interface instead we should  flood them to the local one
used shg != 0 to identify packets from remote interfaces and disable arp term l2 input feature for them

Change-Id: I701537c05df7451a25ccb5bfc9e2b03ea70cff20
Signed-off-by: Eyal Bari <ebari@cisco.com>
(cherry picked from commit a0623f8d26)
This commit is contained in:
Eyal Bari
2017-03-30 03:05:06 +03:00
committed by Ole Trøan
parent 16c76de9b5
commit 0f0ff322b1
3 changed files with 11 additions and 15 deletions
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15
src/vnet/ethernet/arp.c
View File

@ -2220,6 +2220,10 @@ arp_term_l2bd (vlib_main_t * vm,
n_left_to_next -= 1;
p0 = vlib_get_buffer (vm, pi0);
// Terminate only local (SHG == 0) ARP
if (vnet_buffer (p0)->l2.shg != 0)
goto next_l2_feature;
eth0 = vlib_buffer_get_current (p0);
l3h0 = (u8 *) eth0 + vnet_buffer (p0)->l2.l2_len;
ethertype0 = clib_net_to_host_u16 (*(u16 *) (l3h0 - 2));
@ -2271,8 +2275,8 @@ arp_term_l2bd (vlib_main_t * vm,
pending_resolution_t *mc;
ethernet_arp_main_t *am = &ethernet_arp_main;
uword *p = hash_get (am->mac_changes_by_address, 0);
if (p && (vnet_buffer (p0)->l2.shg == 0))
{ // Only SHG 0 interface which is more likely local
if (p)
{
u32 next_index = p[0];
while (next_index != (u32) ~ 0)
{
@ -2333,11 +2337,6 @@ arp_term_l2bd (vlib_main_t * vm,
/* Send ARP/ND reply back out input interface through l2-output */
vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
next0 = ARP_TERM_NEXT_L2_OUTPUT;
/* Note that output to VXLAN tunnel will fail due to SHG which
is probably desireable since ARP termination is not intended
for ARP requests from other hosts. If output to VXLAN tunnel is
required, however, can just clear the SHG in packet as follows:
vnet_buffer(p0)->l2.shg = 0; */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next, pi0,
next0);
@ -2355,7 +2354,7 @@ arp_term_l2bd (vlib_main_t * vm,
sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
if (vnet_ip6_nd_term
(vm, node, p0, eth0, iph0, sw_if_index0,
vnet_buffer (p0)->l2.bd_index, vnet_buffer (p0)->l2.shg))
vnet_buffer (p0)->l2.bd_index))
goto output_response;
}

3
src/vnet/ip/ip6.h
View File

@ -373,8 +373,7 @@ int vnet_ip6_nd_term (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_buffer_t * p0,
ethernet_header_t * eth,
ip6_header_t * ip,
u32 sw_if_index, u16 bd_index, u8 shg);
ip6_header_t * ip, u32 sw_if_index, u16 bd_index);
u8 *format_ip6_forward_next_trace (u8 * s, va_list * args);

8
src/vnet/ip/ip6_neighbor.c
View File

@ -3986,12 +3986,11 @@ vnet_ip6_nd_term (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_buffer_t * p0,
ethernet_header_t * eth,
ip6_header_t * ip, u32 sw_if_index, u16 bd_index, u8 shg)
ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
pending_resolution_t *mc;
uword *p;
ndh = ip6_next_header (ip);
if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
@ -4007,9 +4006,8 @@ vnet_ip6_nd_term (vlib_main_t * vm,
}
/* Check if anyone want ND events for L2 BDs */
p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
if (p && shg == 0 && /* Only SHG 0 interface which is more likely local */
!ip6_address_is_link_local_unicast (&ip->src_address))
uword *p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
if (p && !ip6_address_is_link_local_unicast (&ip->src_address))
{
u32 next_index = p[0];
while (next_index != (u32) ~ 0)