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

[Chilikin, Andrey]

PPPoE consists of two stages with different ethertypes - Discovery and Session, so RTE_PTYPE_L2_ETHER_PPPOE looks ambiguous to me. This patch adds only PPPoE Session Stage packet type. Should it include PPPoE Discovery Stage as well (Ethertype x8863)?  

/Andrey

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Thomas Monjalon
> Sent: Tuesday, May 16, 2017 9:47 PM
> To: dev at dpdk.org; olivier.matz at 6wind.com; Richardson, Bruce
> <bruce.richardson at intel.com>
> Cc: Ray Zhang <zhanglei002 at gmail.com>
> Subject: Re: [dpdk-dev] [PATCH v1] net: support PPPOE in software packet type
> parser
> 
> Any volunteer to review this patch, please?
> 
> 07/04/2017 12:26, Ray Zhang:
> > From: Ray Zhang <zhanglei002 at gmail.com>
> >
> > Add a new RTE_PTYPE_L2_ETHER_PPPOE and its support in
> > rte_net_get_ptype()
> >
> > Signed-off-by: Ray Zhang <zhanglei002 at 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;
> >  	}