ethdev: add actions to modify TCP header fields

Add actions:
- INC_TCP_SEQ - Increase sequence number in the outermost TCP header.
- DEC_TCP_SEQ - Decrease sequence number in the outermost TCP header.
- INC_TCP_ACK - Increase acknowledgment number in the outermost TCP
		header.
- DEC_TCP_ACK - Decrease acknowledgment number in the outermost TCP
		header.

Original work by Xiaoyu Min.

This patch uses the new approach introduced by [1], using a simple
integer instead of using an action-specific structure for each of
the new actions.

[1] http://patches.dpdk.org/patch/55882/

Signed-off-by: Dekel Peled <dekelp@mellanox.com>
Acked-by: Andrew Rybchenko <arybchenko@solarflare.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>

diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst
index a34d012..a68121d 100644 (file)
--- a/doc/guides/prog_guide/rte_flow.rst
+++ b/doc/guides/prog_guide/rte_flow.rst
@@ -2345,6 +2345,38 @@ Otherwise, RTE_FLOW_ERROR_TYPE_ACTION error will be returned.
    | ``mac_addr`` | MAC address   |
    +--------------+---------------+
 
+Action: ``INC_TCP_SEQ``
+^^^^^^^^^^^^^^^^^^^^^^^
+
+Increase sequence number in the outermost TCP header.
+Value to increase TCP sequence number by is a big-endian 32 bit integer.
+
+Using this action on non-matching traffic will result in undefined behavior.
+
+Action: ``DEC_TCP_SEQ``
+^^^^^^^^^^^^^^^^^^^^^^^
+
+Decrease sequence number in the outermost TCP header.
+Value to decrease TCP sequence number by is a big-endian 32 bit integer.
+
+Using this action on non-matching traffic will result in undefined behavior.
+
+Action: ``INC_TCP_ACK``
+^^^^^^^^^^^^^^^^^^^^^^^
+
+Increase acknowledgment number in the outermost TCP header.
+Value to increase TCP acknowledgment number by is a big-endian 32 bit integer.
+
+Using this action on non-matching traffic will result in undefined behavior.
+
+Action: ``DEC_TCP_ACK``
+^^^^^^^^^^^^^^^^^^^^^^^
+
+Decrease acknowledgment number in the outermost TCP header.
+Value to decrease TCP acknowledgment number by is a big-endian 32 bit integer.
+
+Using this action on non-matching traffic will result in undefined behavior.
+
 Negative types
 ~~~~~~~~~~~~~~
 

diff --git a/lib/librte_ethdev/rte_flow.c b/lib/librte_ethdev/rte_flow.c
index 5c49522..0a83f53 100644 (file)
--- a/lib/librte_ethdev/rte_flow.c
+++ b/lib/librte_ethdev/rte_flow.c
@@ -143,6 +143,10 @@ static const struct rte_flow_desc_data rte_flow_desc_action[] = {
        MK_FLOW_ACTION(SET_TTL, sizeof(struct rte_flow_action_set_ttl)),
        MK_FLOW_ACTION(SET_MAC_SRC, sizeof(struct rte_flow_action_set_mac)),
        MK_FLOW_ACTION(SET_MAC_DST, sizeof(struct rte_flow_action_set_mac)),
+       MK_FLOW_ACTION(INC_TCP_SEQ, sizeof(rte_be32_t)),
+       MK_FLOW_ACTION(DEC_TCP_SEQ, sizeof(rte_be32_t)),
+       MK_FLOW_ACTION(INC_TCP_ACK, sizeof(rte_be32_t)),
+       MK_FLOW_ACTION(DEC_TCP_ACK, sizeof(rte_be32_t)),
 };
 
 static int

diff --git a/lib/librte_ethdev/rte_flow.h b/lib/librte_ethdev/rte_flow.h
index f3a8fb1..7fc04d2 100644 (file)
--- a/lib/librte_ethdev/rte_flow.h
+++ b/lib/librte_ethdev/rte_flow.h
@@ -1650,6 +1650,62 @@ enum rte_flow_action_type {
         * See struct rte_flow_action_set_mac.
         */
        RTE_FLOW_ACTION_TYPE_SET_MAC_DST,
+
+       /**
+        * Increase sequence number in the outermost TCP header.
+        *
+        * Action configuration specifies the value to increase
+        * TCP sequence number as a big-endian 32 bit integer.
+        *
+        * @p conf type:
+        * @code rte_be32_t * @endcode
+        *
+        * Using this action on non-matching traffic will result in
+        * undefined behavior.
+        */
+       RTE_FLOW_ACTION_TYPE_INC_TCP_SEQ,
+
+       /**
+        * Decrease sequence number in the outermost TCP header.
+        *
+        * Action configuration specifies the value to decrease
+        * TCP sequence number as a big-endian 32 bit integer.
+        *
+        * @p conf type:
+        * @code rte_be32_t * @endcode
+        *
+        * Using this action on non-matching traffic will result in
+        * undefined behavior.
+        */
+       RTE_FLOW_ACTION_TYPE_DEC_TCP_SEQ,
+
+       /**
+        * Increase acknowledgment number in the outermost TCP header.
+        *
+        * Action configuration specifies the value to increase
+        * TCP acknowledgment number as a big-endian 32 bit integer.
+        *
+        * @p conf type:
+        * @code rte_be32_t * @endcode
+
+        * Using this action on non-matching traffic will result in
+        * undefined behavior.
+        */
+       RTE_FLOW_ACTION_TYPE_INC_TCP_ACK,
+
+       /**
+        * Decrease acknowledgment number in the outermost TCP header.
+        *
+        * Action configuration specifies the value to decrease
+        * TCP acknowledgment number as a big-endian 32 bit integer.
+        *
+        * @p conf type:
+        * @code rte_be32_t * @endcode
+        *
+        * Using this action on non-matching traffic will result in
+        * undefined behavior.
+        */
+       RTE_FLOW_ACTION_TYPE_DEC_TCP_ACK,
 };
 
 /**