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From: Marcin Smoczynski <marcinx.smoczynski@intel.com>
To: marko.kovacevic@intel.com, orika@mellanox.com,
	bruce.richardson@intel.com, pablo.de.lara.guarch@intel.com,
	radu.nicolau@intel.com, akhil.goyal@nxp.com,
	tomasz.kantecki@intel.com, konstantin.ananyev@intel.com,
	bernard.iremonger@intel.com, olivier.matz@6wind.com
Cc: dev@dpdk.org, Marcin Smoczynski <marcinx.smoczynski@intel.com>
Subject: [dpdk-dev] [PATCH 1/3] net: new ipv6 header extension parsing function
Date: Wed,  8 May 2019 12:47:15 +0200	[thread overview]
Message-ID: <20190508104717.13448-1-marcinx.smoczynski@intel.com> (raw)
Message-ID: <20190508104715.dA39zPM-sqk5QJCcBzF259TCUxNuGetZySkGVBlhWno@z> (raw)

Introduce new function for IPv6 header extension parsing able to
determine extension length and next protocol number.

This function is helpful when implementing IPv6 header traversing.

Signed-off-by: Marcin Smoczynski <marcinx.smoczynski@intel.com>
---
 lib/librte_net/rte_ip.h | 49 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/lib/librte_net/rte_ip.h b/lib/librte_net/rte_ip.h
index f9b909090..be64da662 100644
--- a/lib/librte_net/rte_ip.h
+++ b/lib/librte_net/rte_ip.h
@@ -425,6 +425,55 @@ rte_ipv6_udptcp_cksum(const struct ipv6_hdr *ipv6_hdr, const void *l4_hdr)
 	return (uint16_t)cksum;
 }
 
+/* IPv6 fragmentation header size */
+#define RTE_IPV6_FRAG_HDR_SIZE 8
+
+/**
+ * Parse next IPv6 header extension
+ *
+ * This function checks if proto number is an IPv6 extensions and parses its
+ * data if so, providing information on next header and extension length.
+ *
+ * @param p
+ *   Pointer to an extension raw data.
+ * @param proto
+ *   Protocol number extracted from the "next header" field from
+ *   the IPv6 header or the previous extension.
+ * @param ext_len
+ *   Extension data length.
+ * @return
+ *   next protocol number if proto is an IPv6 extension, -EINVAL otherwise
+ */
+static inline int __rte_experimental
+rte_ipv6_get_next_ext(uint8_t *p, int proto, size_t *ext_len)
+{
+	int next_proto;
+
+	switch (proto) {
+	case IPPROTO_AH:
+		next_proto = *p++;
+		*ext_len = (*p + 2) * sizeof(uint32_t);
+		break;
+
+	case IPPROTO_HOPOPTS:
+	case IPPROTO_ROUTING:
+	case IPPROTO_DSTOPTS:
+		next_proto = *p++;
+		*ext_len = (*p + 1) * sizeof(uint64_t);
+		break;
+
+	case IPPROTO_FRAGMENT:
+		next_proto = *p;
+		*ext_len = RTE_IPV6_FRAG_HDR_SIZE;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return next_proto;
+}
+
 #ifdef __cplusplus
 }
 #endif
-- 
2.21.0.windows.1


             reply	other threads:[~2019-05-08 10:47 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-08 10:47 Marcin Smoczynski [this message]
2019-05-08 10:47 ` Marcin Smoczynski
2019-05-08 10:47 ` [dpdk-dev] [PATCH 2/3] ipsec: fix transport mode for ipv6 with extensions Marcin Smoczynski
2019-05-08 10:47   ` Marcin Smoczynski
2019-05-14 12:42   ` Ananyev, Konstantin
2019-05-14 12:42     ` Ananyev, Konstantin
2019-06-20 12:07   ` Akhil Goyal
2019-05-08 10:47 ` [dpdk-dev] [PATCH 3/3] examples/ipsec-secgw: add support for ipv6 options Marcin Smoczynski
2019-05-08 10:47   ` Marcin Smoczynski
2019-05-14 12:51   ` Ananyev, Konstantin
2019-05-14 12:51     ` Ananyev, Konstantin
2019-05-14 12:48 ` [dpdk-dev] [PATCH 1/3] net: new ipv6 header extension parsing function Ananyev, Konstantin
2019-05-14 12:48   ` Ananyev, Konstantin
2019-06-20 11:40 ` Akhil Goyal
2019-06-20 17:40   ` Ananyev, Konstantin
2019-06-21  8:01     ` Akhil Goyal
2019-06-24 11:45       ` Smoczynski, MarcinX
2019-06-25 12:57         ` Akhil Goyal
2019-06-24 13:39 ` [dpdk-dev] [PATCH v2 0/4] IPv6 with options support for IPsec transport Marcin Smoczynski
2019-06-24 13:39   ` [dpdk-dev] [PATCH v2 1/4] net: new ipv6 header extension parsing function Marcin Smoczynski
2019-06-24 18:54     ` Ananyev, Konstantin
2019-07-02  9:06     ` Olivier Matz
2019-06-24 13:39   ` [dpdk-dev] [PATCH v2 2/4] ipsec: fix transport mode for ipv6 with extensions Marcin Smoczynski
2019-06-24 18:55     ` Ananyev, Konstantin
2019-06-24 13:39   ` [dpdk-dev] [PATCH v2 3/4] examples/ipsec-secgw: add support for ipv6 options Marcin Smoczynski
2019-06-24 18:55     ` Ananyev, Konstantin
2019-06-24 13:40   ` [dpdk-dev] [PATCH v2 4/4] examples/ipsec-secgw: add scapy based unittests Marcin Smoczynski
2019-06-24 18:56     ` Ananyev, Konstantin
2019-06-25 12:59   ` [dpdk-dev] [PATCH v2 0/4] IPv6 with options support for IPsec transport Akhil Goyal

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