Simplified the L2 forwarding examples by removing all tables and
actions, as they are not really needed for these simple use-cases.
Signed-off-by: Cristian Dumitrescu <cristian.dumitre...@intel.com>
---
examples/pipeline/examples/l2fwd.spec | 34 +++++-------------
examples/pipeline/examples/l2fwd_macswp.spec | 36 ++++++--------------
2 files changed, 19 insertions(+), 51 deletions(-)
diff --git a/examples/pipeline/examples/l2fwd.spec
b/examples/pipeline/examples/l2fwd.spec
index 0aebafd07b..1e3e1ad040 100644
--- a/examples/pipeline/examples/l2fwd.spec
+++ b/examples/pipeline/examples/l2fwd.spec
@@ -1,42 +1,24 @@
; SPDX-License-Identifier: BSD-3-Clause
; Copyright(c) 2020 Intel Corporation
+; The simplest pipeline processing with just packet reception and
transmission. No header parsing,
+; table lookup or action execution involved. Packets received on port 0 are
sent out on port 1,
+; those received on port 1 are sent out on port 0, etc.
+
//
// Meta-data.
//
struct metadata_t {
- bit<32> port_in
- bit<32> port_out
+ bit<32> port
}
metadata instanceof metadata_t
-//
-// Actions.
-//
-action NoAction args none {
- return
-}
-
-//
-// Tables.
-//
-table stub {
- key {
- }
-
- actions {
- NoAction
- }
-
- default_action NoAction args none const
-}
-
//
// Pipeline.
//
apply {
- rx m.port_in
- table stub
- tx m.port_in
+ rx m.port
+ xor m.port 1
+ tx m.port
}
diff --git a/examples/pipeline/examples/l2fwd_macswp.spec
b/examples/pipeline/examples/l2fwd_macswp.spec
index e81f20622e..4bd5c23c7a 100644
--- a/examples/pipeline/examples/l2fwd_macswp.spec
+++ b/examples/pipeline/examples/l2fwd_macswp.spec
@@ -1,6 +1,9 @@
; SPDX-License-Identifier: BSD-3-Clause
; Copyright(c) 2020 Intel Corporation
+; Layer 2 Forwarding with MACADDR swapping (i.e. within the Ethernet header of
the output packet,
+; the destination MAC address is swapped with the source MAC address).
+
//
// Packet headers.
//
@@ -22,37 +25,20 @@ struct metadata_t {
metadata instanceof metadata_t
-//
-// Actions.
-//
-action macswp args none {
- mov m.addr h.ethernet.dst_addr
- mov h.ethernet.dst_addr h.ethernet.src_addr
- mov h.ethernet.src_addr m.addr
- return
-}
-
-//
-// Tables.
-//
-table stub {
- key {
- }
-
- actions {
- macswp
- }
-
- default_action macswp args none const
-}
-
//
// Pipeline.
//
apply {
rx m.port
extract h.ethernet
- table stub
+
+ //
+ // Ethernet header: dst_addr swapped with src_addr.
+ //
+ mov m.addr h.ethernet.dst_addr
+ mov h.ethernet.dst_addr h.ethernet.src_addr
+ mov h.ethernet.src_addr m.addr
+
xor m.port 1
emit h.ethernet
tx m.port
--
2.34.1
