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authorNeale Ranns <neale.ranns@cisco.com>2018-02-24 02:11:19 -0800
committerDamjan Marion <dmarion.lists@gmail.com>2018-03-05 18:41:12 +0000
commit53da221b13225695516ec7469ca29d82bb10e594 (patch)
tree10f31c7fd4acd536cef4793b5c542938da7f09dc /src/vnet/ip/icmp6.c
parent0e7fe4fddb493350cf78c8126e9cc93d55490c42 (diff)
IP6 link-local table
- IPv6 link local table is a per-SW interface array of IPv6 unicast FIBs - the per-interface ocst is sizeof(fib_table_t) which is small, w.r.t. the cost of an interface - FE80::/10 in the 'global' table points to a DPO that performs a lookup in the input interface's LL fib. Change-Id: Ice834b25ebeeacb2e929d7c864d7ec8c09918cbe Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
Diffstat (limited to 'src/vnet/ip/icmp6.c')
-rw-r--r--src/vnet/ip/icmp6.c89
1 files changed, 13 insertions, 76 deletions
diff --git a/src/vnet/ip/icmp6.c b/src/vnet/ip/icmp6.c
index ab871b3a969..fd5d0ecba38 100644
--- a/src/vnet/ip/icmp6.c
+++ b/src/vnet/ip/icmp6.c
@@ -341,58 +341,14 @@ ip6_icmp_echo_request (vlib_main_t * vm,
ip0->hop_limit = im->host_config.ttl;
ip1->hop_limit = im->host_config.ttl;
- if (ip6_address_is_link_local_unicast (&ip0->dst_address))
- {
- ethernet_header_t *eth0;
- u8 tmp_mac[6];
- /* For link local, reuse current MAC header by sawpping
- * SMAC to DMAC instead of IP6 lookup since link local
- * is not in the IP6 FIB */
- vlib_buffer_reset (p0);
- eth0 = vlib_buffer_get_current (p0);
- clib_memcpy (tmp_mac, eth0->dst_address, 6);
- clib_memcpy (eth0->dst_address, eth0->src_address, 6);
- clib_memcpy (eth0->src_address, tmp_mac, 6);
- vnet_buffer (p0)->sw_if_index[VLIB_TX] =
- vnet_buffer (p0)->sw_if_index[VLIB_RX];
- next0 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
- }
- else
- {
- /* Determine the correct lookup fib indices... */
- fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer (p0)->sw_if_index[VLIB_RX]);
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
- }
-
- if (ip6_address_is_link_local_unicast (&ip1->dst_address))
- {
- ethernet_header_t *eth1;
- u8 tmp_mac[6];
- /* For link local, reuse current MAC header by sawpping
- * SMAC to DMAC instead of IP6 lookup since link local
- * is not in the IP6 FIB */
- vlib_buffer_reset (p1);
- eth1 = vlib_buffer_get_current (p1);
- clib_memcpy (tmp_mac, eth1->dst_address, 6);
- clib_memcpy (eth1->dst_address, eth1->src_address, 6);
- clib_memcpy (eth1->src_address, tmp_mac, 6);
- vnet_buffer (p1)->sw_if_index[VLIB_TX] =
- vnet_buffer (p1)->sw_if_index[VLIB_RX];
- next1 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
- }
- else
- {
- /* Determine the correct lookup fib indices... */
- fib_index1 = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer (p1)->sw_if_index[VLIB_RX]);
- vnet_buffer (p1)->sw_if_index[VLIB_TX] = fib_index1;
- }
-
- vnet_buffer (p0)->sw_if_index[VLIB_RX]
- = vnet_main.local_interface_sw_if_index;
- vnet_buffer (p1)->sw_if_index[VLIB_RX]
- = vnet_main.local_interface_sw_if_index;
+ /* Determine the correct lookup fib indices... */
+ fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
+ vnet_buffer (p0)->sw_if_index[VLIB_RX]);
+ vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
+ /* Determine the correct lookup fib indices... */
+ fib_index1 = vec_elt (im->fib_index_by_sw_if_index,
+ vnet_buffer (p1)->sw_if_index[VLIB_RX]);
+ vnet_buffer (p1)->sw_if_index[VLIB_TX] = fib_index1;
/* verify speculative enqueues, maybe switch current next frame */
/* if next0==next1==next_index then nothing special needs to be done */
@@ -441,30 +397,11 @@ ip6_icmp_echo_request (vlib_main_t * vm,
ip0->hop_limit = im->host_config.ttl;
- if (ip6_address_is_link_local_unicast (&ip0->dst_address))
- {
- ethernet_header_t *eth0;
- u8 tmp_mac[6];
- /* For link local, reuse current MAC header by sawpping
- * SMAC to DMAC instead of IP6 lookup since link local
- * is not in the IP6 FIB */
- vlib_buffer_reset (p0);
- eth0 = vlib_buffer_get_current (p0);
- clib_memcpy (tmp_mac, eth0->dst_address, 6);
- clib_memcpy (eth0->dst_address, eth0->src_address, 6);
- clib_memcpy (eth0->src_address, tmp_mac, 6);
- vnet_buffer (p0)->sw_if_index[VLIB_TX] =
- vnet_buffer (p0)->sw_if_index[VLIB_RX];
- next0 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
- }
- else
- {
- fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer (p0)->sw_if_index[VLIB_RX]);
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
- }
- vnet_buffer (p0)->sw_if_index[VLIB_RX]
- = vnet_main.local_interface_sw_if_index;
+ /* if the packet is link local, we'll bounce through the link-local
+ * table with the RX interface correctly set */
+ fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
+ vnet_buffer (p0)->sw_if_index[VLIB_RX]);
+ vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
/* Verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,