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From: Robin Jarry <rjarry@redhat.com>
To: dev@dpdk.org
Subject: [PATCH dpdk v4 17/17] net: add function to check IPv6 version
Date: Fri, 18 Oct 2024 11:17:34 +0200
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Add a function to check the version in IPv6 headers.
Signed-off-by: Robin Jarry <rjarry@redhat.com>
---
app/test/test_net_ip6.c | 16 ++++++++++++++++
lib/net/rte_ip6.h | 14 ++++++++++++++
2 files changed, 30 insertions(+)
diff --git a/app/test/test_net_ip6.c b/app/test/test_net_ip6.c
index 94033421ad0b..9cc10b1f714f 100644
--- a/app/test/test_net_ip6.c
+++ b/app/test/test_net_ip6.c
@@ -9,6 +9,21 @@
static const struct rte_ipv6_addr mask_full = RTE_IPV6_MASK_FULL;
static const struct rte_ipv6_addr zero_addr = RTE_IPV6_ADDR_UNSPEC;
+static int
+test_ipv6_check_version(void)
+{
+ struct rte_ipv6_hdr h;
+
+ h.vtc_flow = 0;
+ TEST_ASSERT_EQUAL(rte_ipv6_check_version(&h), -EINVAL, "");
+ h.vtc_flow = RTE_BE32(0x7f00ba44);
+ TEST_ASSERT_EQUAL(rte_ipv6_check_version(&h), -EINVAL, "");
+ h.vtc_flow = RTE_BE32(0x6badcaca);
+ TEST_ASSERT_EQUAL(rte_ipv6_check_version(&h), 0, "");
+
+ return 0;
+}
+
static int
test_ipv6_addr_mask(void)
{
@@ -167,6 +182,7 @@ test_ether_mcast_from_ipv6(void)
static int
test_net_ipv6(void)
{
+ TEST_ASSERT_SUCCESS(test_ipv6_check_version(), "");
TEST_ASSERT_SUCCESS(test_ipv6_addr_mask(), "");
TEST_ASSERT_SUCCESS(test_ipv6_addr_eq_prefix(), "");
TEST_ASSERT_SUCCESS(test_ipv6_addr_kind(), "");
diff --git a/lib/net/rte_ip6.h b/lib/net/rte_ip6.h
index d02b225303e9..94bc5a39b348 100644
--- a/lib/net/rte_ip6.h
+++ b/lib/net/rte_ip6.h
@@ -364,6 +364,20 @@ struct rte_ipv6_hdr {
struct rte_ipv6_addr dst_addr; /**< IP address of destination host(s). */
} __rte_packed;
+/**
+ * Check that the IPv6 header version field is valid according to RFC 8200 section 3.
+ *
+ * @return
+ * 0 if the version field is valid. -EINVAL otherwise.
+ */
+static inline int rte_ipv6_check_version(const struct rte_ipv6_hdr *ip)
+{
+ uint8_t version = ((const uint8_t *)ip)[0];
+ if ((version & 0xf0) != 0x60)
+ return -EINVAL;
+ return 0;
+}
+
/* IPv6 routing extension type definition. */
#define RTE_IPV6_SRCRT_TYPE_4 4
--
2.47.0