/*
 * Copyright 2019-present GEANT RARE project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed On an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


#ifndef _IG_CTL_PPPOE_P4_
#define _IG_CTL_PPPOE_P4_

#ifdef HAVE_PPPOE

control IngressControlPPPOE(inout headers hdr, inout ingress_metadata_t ig_md,
                            in ingress_intrinsic_metadata_t ig_intr_md,
                            inout ingress_intrinsic_metadata_for_deparser_t ig_dprsr_md,
                            inout ingress_intrinsic_metadata_for_tm_t ig_tm_md)
{

    action send_to_cpu() {
        /*
         * Prepend cpu header to pkt sent to controller
         * by calling setValid() so it is tekne into account by deparser
         */
        ig_md.nexthop_id = CPU_PORT;
    }


    action act_drop() {
        ig_dprsr_md.drop_ctl = 1;
    }

    action act_pppoe_data(SubIntId_t port) {
        ig_md.source_id = port;
    }



    table tbl_pppoe {
        key = {
hdr.pppoeD.session:
            exact;
ig_md.source_id:
            exact;
        }
        actions = {
            act_drop;
            act_pppoe_data;
        }
        size = PPPOE_TABLE_SIZE;
        default_action = act_drop();
    }



    apply {
        /*
         * It is a dataplane packet
         */
        if (ig_md.pppoe_ctrl_valid==1)  {
            send_to_cpu();
        } else if (ig_md.pppoe_data_valid==1) {
            tbl_pppoe.apply();
            if (hdr.pppoeD.ppptyp == PPPTYPE_IPV4) ig_md.ethertype = ETHERTYPE_IPV4;
            else if (hdr.pppoeD.ppptyp == PPPTYPE_IPV6) ig_md.ethertype = ETHERTYPE_IPV6;
#ifdef HAVE_SGT
            else if (hdr.pppoeD.ppptyp == PPPTYPE_SGT) ig_md.ethertype = ETHERTYPE_SGT;
#endif
#ifdef HAVE_MPLS
            else if (hdr.pppoeD.ppptyp == PPPTYPE_MPLS_UCAST) ig_md.ethertype = ETHERTYPE_MPLS_UCAST;
#endif
#ifdef HAVE_TAP
            else if (hdr.pppoeD.ppptyp == PPPTYPE_ROUTEDMAC) ig_md.ethertype = ETHERTYPE_ROUTEDMAC;
#endif
        }

    }


}

#endif

#endif // _IG_CTL_PPPOE_P4_

