This patch adds API support for ICMPv6 ID and sequence.
1: Add two new pattern item types for ICMPv6 echo request and reply:
  RTE_FLOW_ITEM_TYPE_ICMP6_ECHO_REQUEST
  RTE_FLOW_ITEM_TYPE_ICMP6_ECHO_REPLY

2: Add new header file rte_icmp6.h for ICMPv6 packet definitions.
3: Enhance testpmd flow pattern to support ICMPv6 identifier and sequence.

  Example of ICMPv6 echo pattern in testpmd command:

  pattern eth / ipv6 / icmp6_echo_request / end
  pattern eth / ipv6 / icmp6_echo_reply / end
  pattern eth / ipv6 / icmp6_echo_request ident is 20 seq is 30 / end

Signed-off-by: Leo Xu <yongqu...@nvidia.com>
Signed-off-by: Bing Zhao <bi...@nvidia.com>
---
 app/test-pmd/cmdline_flow.c                 | 70 +++++++++++++++++++++
 doc/guides/prog_guide/rte_flow.rst          | 14 +++++
 doc/guides/rel_notes/release_23_03.rst      |  4 ++
 doc/guides/testpmd_app_ug/testpmd_funcs.rst | 10 +++
 lib/ethdev/rte_flow.c                       |  4 ++
 lib/ethdev/rte_flow.h                       | 25 ++++++++
 lib/net/meson.build                         |  1 +
 lib/net/rte_icmp6.h                         | 48 ++++++++++++++
 8 files changed, 176 insertions(+)
 create mode 100644 lib/net/rte_icmp6.h

diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index 88108498e0..7dc1528899 100644
--- a/app/test-pmd/cmdline_flow.c
+++ b/app/test-pmd/cmdline_flow.c
@@ -360,6 +360,12 @@ enum index {
        ITEM_ICMP6,
        ITEM_ICMP6_TYPE,
        ITEM_ICMP6_CODE,
+       ITEM_ICMP6_ECHO_REQUEST,
+       ITEM_ICMP6_ECHO_REQUEST_ID,
+       ITEM_ICMP6_ECHO_REQUEST_SEQ,
+       ITEM_ICMP6_ECHO_REPLY,
+       ITEM_ICMP6_ECHO_REPLY_ID,
+       ITEM_ICMP6_ECHO_REPLY_SEQ,
        ITEM_ICMP6_ND_NS,
        ITEM_ICMP6_ND_NS_TARGET_ADDR,
        ITEM_ICMP6_ND_NA,
@@ -1327,6 +1333,8 @@ static const enum index next_item[] = {
        ITEM_IPV6_EXT,
        ITEM_IPV6_FRAG_EXT,
        ITEM_ICMP6,
+       ITEM_ICMP6_ECHO_REQUEST,
+       ITEM_ICMP6_ECHO_REPLY,
        ITEM_ICMP6_ND_NS,
        ITEM_ICMP6_ND_NA,
        ITEM_ICMP6_ND_OPT,
@@ -1575,6 +1583,20 @@ static const enum index item_icmp6[] = {
        ZERO,
 };
 
+static const enum index item_icmp6_echo_request[] = {
+       ITEM_ICMP6_ECHO_REQUEST_ID,
+       ITEM_ICMP6_ECHO_REQUEST_SEQ,
+       ITEM_NEXT,
+       ZERO,
+};
+
+static const enum index item_icmp6_echo_reply[] = {
+       ITEM_ICMP6_ECHO_REPLY_ID,
+       ITEM_ICMP6_ECHO_REPLY_SEQ,
+       ITEM_NEXT,
+       ZERO,
+};
+
 static const enum index item_icmp6_nd_ns[] = {
        ITEM_ICMP6_ND_NS_TARGET_ADDR,
        ITEM_NEXT,
@@ -4323,6 +4345,54 @@ static const struct token token_list[] = {
                .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_icmp6,
                                             code)),
        },
+       [ITEM_ICMP6_ECHO_REQUEST] = {
+               .name = "icmp6_echo_request",
+               .help = "match ICMPv6 echo request",
+               .priv = PRIV_ITEM(ICMP6_ECHO_REQUEST,
+                                 sizeof(struct rte_flow_item_icmp6_echo)),
+               .next = NEXT(item_icmp6_echo_request),
+               .call = parse_vc,
+       },
+       [ITEM_ICMP6_ECHO_REQUEST_ID] = {
+               .name = "ident",
+               .help = "ICMPv6 echo request identifier",
+               .next = NEXT(item_icmp6_echo_request, 
NEXT_ENTRY(COMMON_UNSIGNED),
+                            item_param),
+               .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_icmp6_echo,
+                                            echo.identifier)),
+       },
+       [ITEM_ICMP6_ECHO_REQUEST_SEQ] = {
+               .name = "seq",
+               .help = "ICMPv6 echo request sequence",
+               .next = NEXT(item_icmp6_echo_request, 
NEXT_ENTRY(COMMON_UNSIGNED),
+                            item_param),
+               .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_icmp6_echo,
+                                            echo.sequence)),
+       },
+       [ITEM_ICMP6_ECHO_REPLY] = {
+               .name = "icmp6_echo_reply",
+               .help = "match ICMPv6 echo reply",
+               .priv = PRIV_ITEM(ICMP6_ECHO_REPLY,
+                                 sizeof(struct rte_flow_item_icmp6_echo)),
+               .next = NEXT(item_icmp6_echo_reply),
+               .call = parse_vc,
+       },
+       [ITEM_ICMP6_ECHO_REPLY_ID] = {
+               .name = "ident",
+               .help = "ICMPv6 echo reply identifier",
+               .next = NEXT(item_icmp6_echo_reply, NEXT_ENTRY(COMMON_UNSIGNED),
+                            item_param),
+               .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_icmp6_echo,
+                                            echo.identifier)),
+       },
+       [ITEM_ICMP6_ECHO_REPLY_SEQ] = {
+               .name = "seq",
+               .help = "ICMPv6 echo reply sequence",
+               .next = NEXT(item_icmp6_echo_reply, NEXT_ENTRY(COMMON_UNSIGNED),
+                            item_param),
+               .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_icmp6_echo,
+                                            echo.sequence)),
+       },
        [ITEM_ICMP6_ND_NS] = {
                .name = "icmp6_nd_ns",
                .help = "match ICMPv6 neighbor discovery solicitation",
diff --git a/doc/guides/prog_guide/rte_flow.rst 
b/doc/guides/prog_guide/rte_flow.rst
index 3e6242803d..59932e82a6 100644
--- a/doc/guides/prog_guide/rte_flow.rst
+++ b/doc/guides/prog_guide/rte_flow.rst
@@ -1165,6 +1165,20 @@ Matches any ICMPv6 header.
 - ``checksum``: ICMPv6 checksum.
 - Default ``mask`` matches ``type`` and ``code``.
 
+Item: ``ICMP6_ECHO_REQUEST``
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Matches an ICMPv6 echo request.
+
+- ``echo``: ICMP6 echo definition (``rte_icmp6.h``).
+
+Item: ``ICMP6_ECHO_REPLY``
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Matches an ICMPv6 echo reply.
+
+- ``echo``: ICMP6 echo definition (``rte_icmp6.h``).
+
 Item: ``ICMP6_ND_NS``
 ^^^^^^^^^^^^^^^^^^^^^
 
diff --git a/doc/guides/rel_notes/release_23_03.rst 
b/doc/guides/rel_notes/release_23_03.rst
index b8c5b68d6c..5af9c43dd9 100644
--- a/doc/guides/rel_notes/release_23_03.rst
+++ b/doc/guides/rel_notes/release_23_03.rst
@@ -55,6 +55,10 @@ New Features
      Also, make sure to start the actual text at the margin.
      =======================================================
 
+* **Added rte_flow support for matching ICMPv6 ID and sequence fields.**
+
+  Added ``icmp6_echo`` item in rte_flow to support ID and sequence
+  matching in ICMPv6 echo request/reply packets.
 
 Removed Items
 -------------
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst 
b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index 0037506a79..f497bba26d 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -3622,6 +3622,16 @@ This section lists supported pattern items and their 
attributes, if any.
   - ``type {unsigned}``: ICMPv6 type.
   - ``code {unsigned}``: ICMPv6 code.
 
+- ``icmp6_echo_request``: match ICMPv6 echo request.
+
+  - ``ident {unsigned}``: ICMPv6 echo request identifier.
+  - ``seq {unsigned}``: ICMPv6 echo request sequence number.
+
+- ``icmp6_echo_reply``: match ICMPv6 echo reply.
+
+  - ``ident {unsigned}``: ICMPv6 echo reply identifier.
+  - ``seq {unsigned}``: ICMPv6 echo reply sequence number.
+
 - ``icmp6_nd_ns``: match ICMPv6 neighbor discovery solicitation.
 
   - ``target_addr {ipv6 address}``: target address.
diff --git a/lib/ethdev/rte_flow.c b/lib/ethdev/rte_flow.c
index 7d0c24366c..39cd4f9817 100644
--- a/lib/ethdev/rte_flow.c
+++ b/lib/ethdev/rte_flow.c
@@ -123,6 +123,10 @@ static const struct rte_flow_desc_data 
rte_flow_desc_item[] = {
        MK_FLOW_ITEM(IPV6_EXT, sizeof(struct rte_flow_item_ipv6_ext)),
        MK_FLOW_ITEM(IPV6_FRAG_EXT, sizeof(struct rte_flow_item_ipv6_frag_ext)),
        MK_FLOW_ITEM(ICMP6, sizeof(struct rte_flow_item_icmp6)),
+       MK_FLOW_ITEM(ICMP6_ECHO_REQUEST,
+                    sizeof(struct rte_flow_item_icmp6_echo)),
+       MK_FLOW_ITEM(ICMP6_ECHO_REPLY,
+                    sizeof(struct rte_flow_item_icmp6_echo)),
        MK_FLOW_ITEM(ICMP6_ND_NS, sizeof(struct rte_flow_item_icmp6_nd_ns)),
        MK_FLOW_ITEM(ICMP6_ND_NA, sizeof(struct rte_flow_item_icmp6_nd_na)),
        MK_FLOW_ITEM(ICMP6_ND_OPT, sizeof(struct rte_flow_item_icmp6_nd_opt)),
diff --git a/lib/ethdev/rte_flow.h b/lib/ethdev/rte_flow.h
index b60987db4b..72695aca8a 100644
--- a/lib/ethdev/rte_flow.h
+++ b/lib/ethdev/rte_flow.h
@@ -21,6 +21,7 @@
 #include <rte_common.h>
 #include <rte_ether.h>
 #include <rte_icmp.h>
+#include <rte_icmp6.h>
 #include <rte_ip.h>
 #include <rte_sctp.h>
 #include <rte_tcp.h>
@@ -624,6 +625,20 @@ enum rte_flow_item_type {
         * See struct rte_flow_item_meter_color.
         */
        RTE_FLOW_ITEM_TYPE_METER_COLOR,
+
+       /**
+        * Matches an ICMPv6 echo request.
+        *
+        * See struct rte_flow_item_icmp6_echo.
+        */
+       RTE_FLOW_ITEM_TYPE_ICMP6_ECHO_REQUEST,
+
+       /**
+        * Matches an ICMPv6 echo reply.
+        *
+        * See struct rte_flow_item_icmp6_echo.
+        */
+       RTE_FLOW_ITEM_TYPE_ICMP6_ECHO_REPLY,
 };
 
 /**
@@ -1303,6 +1318,16 @@ static const struct rte_flow_item_icmp6 
rte_flow_item_icmp6_mask = {
 };
 #endif
 
+/**
+ * RTE_FLOW_ITEM_TYPE_ICMP6_ECHO_REQUEST
+ * RTE_FLOW_ITEM_TYPE_ICMP6_ECHO_REPLY
+ *
+ * Matches an ICMPv6 echo request or reply.
+ */
+struct rte_flow_item_icmp6_echo {
+       struct rte_icmp6_echo echo;
+};
+
 /**
  * RTE_FLOW_ITEM_TYPE_ICMP6_ND_NS
  *
diff --git a/lib/net/meson.build b/lib/net/meson.build
index 379d161ee0..ce3ca67bdc 100644
--- a/lib/net/meson.build
+++ b/lib/net/meson.build
@@ -22,6 +22,7 @@ headers = files(
         'rte_geneve.h',
         'rte_l2tpv2.h',
         'rte_ppp.h',
+        'rte_icmp6.h',
 )
 
 sources = files(
diff --git a/lib/net/rte_icmp6.h b/lib/net/rte_icmp6.h
new file mode 100644
index 0000000000..bf6956d7c9
--- /dev/null
+++ b/lib/net/rte_icmp6.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) 2022 NVIDIA Corporation & Affiliates
+ */
+
+#ifndef _RTE_ICMP6_H_
+#define _RTE_ICMP6_H_
+
+/**
+ * @file
+ *
+ * ICMP6-related defines
+ */
+
+#include <stdint.h>
+
+#include <rte_byteorder.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * ICMP6 header
+ */
+struct rte_icmp6_hdr {
+       uint8_t type;
+       uint8_t code;
+       rte_be16_t checksum;
+} __rte_packed;
+
+/**
+ * ICMP6 echo
+ */
+struct rte_icmp6_echo {
+       struct rte_icmp6_hdr hdr;
+       rte_be16_t identifier;
+       rte_be16_t sequence;
+} __rte_packed;
+
+/* ICMP6 packet types */
+#define RTE_ICMP6_ECHO_REQUEST 128
+#define RTE_ICMP6_ECHO_REPLY   129
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* RTE_ICMP6_H_ */
-- 
2.27.0

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