classifier.c

/*
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 * 
 *   Copyright(c) 2007-2017 Intel Corporation. All rights reserved.
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 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
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 *  version: RWPA_VNF.L.18.02.0-42
 */

#include <rte_branch_prediction.h>
#include <rte_common.h>
#include <rte_mbuf.h>
#include <rte_ether.h>
#include <rte_ip.h>

#include "key.h"
#include "ether.h"
#include "ieee80211.h"
#include "ieee8022.h"
#include "classifier.h"

enum outer_pkt_type
initial_packet_classify(struct rte_mbuf *mbuf)
{
    enum outer_pkt_type pkt_type = OUTER_PKT_TYPE_DELIM;
    struct ether_hdr *eth_hdr;
    struct ipv4_hdr *ipv4_hdr;

    /* check parameters */
    if (unlikely(mbuf == NULL))
        return pkt_type;

    eth_hdr = rte_pktmbuf_mtod(mbuf, struct ether_hdr *);
    ipv4_hdr = (struct ipv4_hdr *)&eth_hdr[1];

    uint16_t ether_type = rte_be_to_cpu_16(eth_hdr->ether_type);

    if (likely(ether_type == ETHER_TYPE_IPv4)) {
        if (ipv4_hdr->next_proto_id == IPPROTO_GRE)
            pkt_type = OUTER_PKT_TYPE_GRE;
        else if (ipv4_hdr->next_proto_id == IPPROTO_UDP)
            pkt_type = OUTER_PKT_TYPE_UDP;
        else if (ipv4_hdr->next_proto_id == IPPROTO_ICMP)
            pkt_type = OUTER_PKT_TYPE_ICMP;
        else
            pkt_type = OUTER_PKT_TYPE_OTHER_IP;
    } else if (ether_type == ETHER_TYPE_ARP)
        pkt_type = OUTER_PKT_TYPE_ARP;

    return pkt_type;
}