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authorNeale Ranns <nranns@cisco.com>2017-03-01 15:12:11 -0800
committerNeale Ranns <nranns@cisco.com>2017-04-07 09:12:12 +0000
commit0f26c5a0138ac86d7ebd197c31a09d8d624c35fe (patch)
tree5cee4659885432c439e44d7346fd5e482df5f0e6 /src/vnet/mfib/mfib_forward.c
parentc14f31c2c62fb66d98aef4402a6f1bda09683fd3 (diff)
MPLS Mcast
1 - interface-DPO Used in the Data-plane to change a packet's input interface 2 - MPLS multicast FIB entry Same as a unicast entry but it links to a replicate not a load-balance DPO 3 - Multicast MPLS tunnel Update MPLS tunnels to use a FIB path-list to describe the endpoint[s]. Use the path-list to generate the forwarding chain (DPOs) to link to . 4 - Resolve a path via a local label (of an mLDP LSP) For IP multicast entries to use an LSP in the replication list, we need to decribe the 'resolve-via-label' where the label is that of a multicast LSP. 5 - MPLS disposition path sets RPF-ID For a interface-less LSP (i.e. mLDP not RSVP-TE) at the tail of the LSP we still need to perform an RPF check. An MPLS disposition DPO performs the MPLS pop validation checks and sets the RPF-ID in the packet. 6 - RPF check with per-entry RPF-ID An RPF-ID is used instead of a real interface SW if index in the case the IP traffic arrives from an LSP that does not have an associated interface. Change-Id: Ib92e177be919147bafeb599729abf3d1abc2f4b3 Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/mfib/mfib_forward.c')
-rw-r--r--src/vnet/mfib/mfib_forward.c29
1 files changed, 21 insertions, 8 deletions
diff --git a/src/vnet/mfib/mfib_forward.c b/src/vnet/mfib/mfib_forward.c
index 5fe0a57c03b..3d8f4f98cb0 100644
--- a/src/vnet/mfib/mfib_forward.c
+++ b/src/vnet/mfib/mfib_forward.c
@@ -380,13 +380,27 @@ mfib_forward_rpf (vlib_main_t * vm,
* for the case of throughput traffic that is not replicated
* to the host stack nor sets local flags
*/
- if (PREDICT_TRUE(NULL != mfi0))
+
+ /*
+ * If the mfib entry has a configured RPF-ID check that
+ * in preference to an interface based RPF
+ */
+ if (MFIB_RPF_ID_NONE != mfe0->mfe_rpf_id)
{
- iflags0 = mfi0->mfi_flags;
+ iflags0 = (mfe0->mfe_rpf_id == vnet_buffer(b0)->ip.rpf_id ?
+ MFIB_ITF_FLAG_ACCEPT :
+ MFIB_ITF_FLAG_NONE);
}
else
{
- iflags0 = MFIB_ITF_FLAG_NONE;
+ if (PREDICT_TRUE(NULL != mfi0))
+ {
+ iflags0 = mfi0->mfi_flags;
+ }
+ else
+ {
+ iflags0 = MFIB_ITF_FLAG_NONE;
+ }
}
eflags0 = mfe0->mfe_flags;
@@ -436,17 +450,16 @@ mfib_forward_rpf (vlib_main_t * vm,
{
mfib_forward_rpf_trace_t *t0;
- t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
+ t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
t0->entry_index = mfei0;
+ t0->itf_flags = iflags0;
if (NULL == mfi0)
{
t0->sw_if_index = ~0;
- t0->itf_flags = MFIB_ITF_FLAG_NONE;
}
else
{
t0->sw_if_index = mfi0->mfi_sw_if_index;
- t0->itf_flags = mfi0->mfi_flags;
}
}
vlib_validate_buffer_enqueue_x1 (vm, node, next,
@@ -478,7 +491,7 @@ VLIB_REGISTER_NODE (ip4_mfib_forward_rpf_node, static) = {
.n_next_nodes = MFIB_FORWARD_RPF_N_NEXT,
.next_nodes = {
- [MFIB_FORWARD_RPF_NEXT_DROP] = "error-drop",
+ [MFIB_FORWARD_RPF_NEXT_DROP] = "ip4-drop",
},
};
@@ -503,7 +516,7 @@ VLIB_REGISTER_NODE (ip6_mfib_forward_rpf_node, static) = {
.n_next_nodes = MFIB_FORWARD_RPF_N_NEXT,
.next_nodes = {
- [MFIB_FORWARD_RPF_NEXT_DROP] = "error-drop",
+ [MFIB_FORWARD_RPF_NEXT_DROP] = "ip6-drop",
},
};