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-rw-r--r--vnet/vnet/nsh-vxlan-gpe/decap.c130
1 files changed, 115 insertions, 15 deletions
diff --git a/vnet/vnet/nsh-vxlan-gpe/decap.c b/vnet/vnet/nsh-vxlan-gpe/decap.c
index 62bb0f81dc7..a8de9bc3af1 100644
--- a/vnet/vnet/nsh-vxlan-gpe/decap.c
+++ b/vnet/vnet/nsh-vxlan-gpe/decap.c
@@ -166,11 +166,44 @@ nsh_vxlan_gpe_input (vlib_main_t * vm,
/* Required to make the l2 tag push / pop code work on l2 subifs */
vnet_update_l2_len (b0);
- /*
- * ip[46] lookup in the configured FIB
- * nsh-vxlan-gpe-encap, here's the encap tunnel sw_if_index
- */
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
+ if (next0 == NSH_VXLAN_GPE_INPUT_NEXT_NSH_VXLAN_GPE_ENCAP)
+ {
+ /*
+ * Functioning as SFF (ie "half NSH tunnel mode")
+ * If ingress (we are in decap.c) with NSH header, and 'decap next nsh-vxlan-gpe' then "NSH switch"
+ * 1. Take DST, remap to SRC, remap other keys in place
+ * 2. Look up new t0 as per above
+ * 3. Set sw_if_index[VLIB_TX] to be t0->sw_if_index
+ */
+ uword * next_p0;
+ nsh_vxlan_gpe_tunnel_t * next_t0;
+ nsh_vxlan_gpe_tunnel_key_t next_key0;
+
+ next_key0.src = iuvn0->ip4.dst_address.as_u32;
+ next_key0.vni = iuvn0->vxlan.vni_res;
+ next_key0.spi_si = iuvn0->nsh.spi_si;
+ next_key0.pad = 0;
+
+ next_p0 = hash_get_mem (ngm->nsh_vxlan_gpe_tunnel_by_key, &next_key0);
+
+ if (next_p0 == 0)
+ {
+ error0 = NSH_VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
+ goto trace0;
+ }
+ next_t0 = pool_elt_at_index (ngm->tunnels, next_p0[0]);
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = next_t0->sw_if_index;
+
+ }
+ else
+ {
+ /*
+ * ip[46] lookup in the configured FIB
+ * nsh-vxlan-gpe-encap, here's the encap tunnel sw_if_index
+ */
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
+ }
+
trace0:
b0->error = error0 ? node->errors[error0] : 0;
@@ -215,10 +248,44 @@ nsh_vxlan_gpe_input (vlib_main_t * vm,
/* Required to make the l2 tag push / pop code work on l2 subifs */
vnet_update_l2_len (b1);
- /*
- * ip[46] lookup in the configured FIB
- * nsh-vxlan-gpe-encap, here's the encap tunnel sw_if_index
- */
+ if (next1 == NSH_VXLAN_GPE_INPUT_NEXT_NSH_VXLAN_GPE_ENCAP)
+ {
+ /*
+ * Functioning as SFF (ie "half NSH tunnel mode")
+ * If ingress (we are in decap.c) with NSH header, and 'decap next nsh-vxlan-gpe' then "NSH switch"
+ * 1. Take DST, remap to SRC, remap other keys in place
+ * 2. Look up new t0 as per above
+ * 3. Set sw_if_index[VLIB_TX] to be t0->sw_if_index
+ */
+ uword * next_p1;
+ nsh_vxlan_gpe_tunnel_t * next_t1;
+ nsh_vxlan_gpe_tunnel_key_t next_key1;
+
+ next_key1.src = iuvn0->ip4.dst_address.as_u32;
+ next_key1.vni = iuvn0->vxlan.vni_res;
+ next_key1.spi_si = iuvn0->nsh.spi_si;
+ next_key1.pad = 0;
+
+ next_p1 = hash_get_mem (ngm->nsh_vxlan_gpe_tunnel_by_key, &next_key1);
+
+ if (next_p1 == 0)
+ {
+ error1 = NSH_VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
+ goto trace1;
+ }
+ next_t1 = pool_elt_at_index (ngm->tunnels, next_p1[0]);
+ vnet_buffer(b1)->sw_if_index[VLIB_TX] = next_t1->sw_if_index;
+
+ }
+ else
+ {
+ /*
+ * ip[46] lookup in the configured FIB
+ * nsh-vxlan-gpe-encap, here's the encap tunnel sw_if_index
+ */
+ vnet_buffer(b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
+ }
+
vnet_buffer(b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
pkts_decapsulated += 2;
@@ -283,7 +350,7 @@ nsh_vxlan_gpe_input (vlib_main_t * vm,
|| (key0.as_u64[1] != last_key.as_u64[1])))
{
p0 = hash_get_mem (ngm->nsh_vxlan_gpe_tunnel_by_key, &key0);
-
+
if (p0 == 0)
{
error0 = NSH_VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
@@ -304,11 +371,44 @@ nsh_vxlan_gpe_input (vlib_main_t * vm,
/* Required to make the l2 tag push / pop code work on l2 subifs */
vnet_update_l2_len (b0);
- /*
- * ip[46] lookup in the configured FIB
- * nsh-vxlan-gpe-encap, here's the encap tunnel sw_if_index
- */
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
+ if (next0 == NSH_VXLAN_GPE_INPUT_NEXT_NSH_VXLAN_GPE_ENCAP)
+ {
+ /*
+ * Functioning as SFF (ie "half NSH tunnel mode")
+ * If ingress (we are in decap.c) with NSH header, and 'decap next nsh-vxlan-gpe' then "NSH switch"
+ * 1. Take DST, remap to SRC, remap other keys in place
+ * 2. Look up new t0 as per above
+ * 3. Set sw_if_index[VLIB_TX] to be t0->sw_if_index
+ */
+ uword * next_p0;
+ nsh_vxlan_gpe_tunnel_t * next_t0;
+ nsh_vxlan_gpe_tunnel_key_t next_key0;
+
+ next_key0.src = iuvn0->ip4.dst_address.as_u32;
+ next_key0.vni = iuvn0->vxlan.vni_res;
+ next_key0.spi_si = iuvn0->nsh.spi_si;
+ next_key0.pad = 0;
+
+ next_p0 = hash_get_mem (ngm->nsh_vxlan_gpe_tunnel_by_key, &next_key0);
+
+ if (next_p0 == 0)
+ {
+ error0 = NSH_VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
+ goto trace00;
+ }
+ next_t0 = pool_elt_at_index (ngm->tunnels, next_p0[0]);
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = next_t0->sw_if_index;
+
+ }
+ else
+ {
+ /*
+ * ip[46] lookup in the configured FIB
+ * nsh-vxlan-gpe-encap, here's the encap tunnel sw_if_index
+ */
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
+ }
+
pkts_decapsulated ++;
trace00: