[dpdk-dev] [PATCH v1] net: support PPPOE in software packet type parser

[Ray Zhang <zhanglei002@gmail.com>]

From: Ray Zhang <zhanglei002@gmail.com>

Add a new RTE_PTYPE_L2_ETHER_PPPOE and its support in
rte_net_get_ptype()

Signed-off-by: Ray Zhang <zhanglei002@gmail.com>
---

Resend the patch

 lib/librte_mbuf/rte_mbuf_ptype.h |  7 +++++++
 lib/librte_net/rte_ether.h       | 12 ++++++++++++
 lib/librte_net/rte_net.c         | 19 +++++++++++++++++++
 3 files changed, 38 insertions(+)

diff --git a/lib/librte_mbuf/rte_mbuf_ptype.h b/lib/librte_mbuf/rte_mbuf_ptype.h
index ff6de9d..7dd03de 100644
--- a/lib/librte_mbuf/rte_mbuf_ptype.h
+++ b/lib/librte_mbuf/rte_mbuf_ptype.h
@@ -150,6 +150,13 @@
  */
 #define RTE_PTYPE_L2_ETHER_QINQ             0x00000007
 /**
+ * PPPOE packet type.
+ *
+ * Packet format:
+ * <'ether type'=[0x8864]>
+ */
+#define RTE_PTYPE_L2_ETHER_PPPOE            0x00000008
+/**
  * Mask of layer 2 packet types.
  * It is used for outer packet for tunneling cases.
  */
diff --git a/lib/librte_net/rte_ether.h b/lib/librte_net/rte_ether.h
index ff3d065..d76edb3 100644
--- a/lib/librte_net/rte_ether.h
+++ b/lib/librte_net/rte_ether.h
@@ -323,12 +323,24 @@ struct vxlan_hdr {
 	uint32_t vx_vni;   /**< VNI (24) + Reserved (8). */
 } __attribute__((__packed__));
 
+/**
+ * PPPOE protocol header
+ */
+struct pppoe_hdr {
+	uint8_t  type_ver;
+	uint8_t  code;
+	uint16_t sid;
+	uint16_t length;
+	uint16_t proto;
+} __attribute__((packed));
+
 /* Ethernet frame types */
 #define ETHER_TYPE_IPv4 0x0800 /**< IPv4 Protocol. */
 #define ETHER_TYPE_IPv6 0x86DD /**< IPv6 Protocol. */
 #define ETHER_TYPE_ARP  0x0806 /**< Arp Protocol. */
 #define ETHER_TYPE_RARP 0x8035 /**< Reverse Arp Protocol. */
 #define ETHER_TYPE_VLAN 0x8100 /**< IEEE 802.1Q VLAN tagging. */
+#define ETHER_TYPE_PPPOE 0x8864 /**< PPPoE Protocol */
 #define ETHER_TYPE_QINQ 0x88A8 /**< IEEE 802.1ad QinQ tagging. */
 #define ETHER_TYPE_1588 0x88F7 /**< IEEE 802.1AS 1588 Precise Time Protocol. */
 #define ETHER_TYPE_SLOW 0x8809 /**< Slow protocols (LACP and Marker). */
diff --git a/lib/librte_net/rte_net.c b/lib/librte_net/rte_net.c
index a8c7aff..439c2f6 100644
--- a/lib/librte_net/rte_net.c
+++ b/lib/librte_net/rte_net.c
@@ -302,6 +302,25 @@ uint32_t rte_net_get_ptype(const struct rte_mbuf *m,
 		off += 2 * sizeof(*vh);
 		hdr_lens->l2_len += 2 * sizeof(*vh);
 		proto = vh->eth_proto;
+	} else if (proto == rte_cpu_to_be_16(ETHER_TYPE_PPPOE)) {
+		const struct pppoe_hdr *ph;
+		struct pppoe_hdr ph_copy;
+
+		pkt_type = RTE_PTYPE_L2_ETHER_PPPOE;
+		ph = rte_pktmbuf_read(m, off, sizeof(*ph), &ph_copy);
+		if (unlikely(ph == NULL))
+			return pkt_type;
+
+		off += sizeof(*ph);
+		hdr_lens->l2_len += sizeof(*ph);
+		if (ph->code != 0) /* Not Seesion Data */
+			return pkt_type;
+		if (ph->proto == rte_cpu_to_be_16(0x21))
+			proto = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
+		else if (ph->proto == rte_cpu_to_be_16(0x57))
+			proto = rte_cpu_to_be_16(ETHER_TYPE_IPv6);
+		else
+			return pkt_type;
 	}
 
  l3:
-- 
1.9.1