NED File src/simu5g/stack/ip2nic/Ip2Nic.ned

Name	Type	Description
Ip2Nic	simple module	Bridges the IP network layer and the cellular protocol stack, handling bidirectional packet flow. Extracts flow information from IP headers and attaches it as control tags for the stack. In base stations, determines the destination user equipment from IP addresses.

Source code

//
//                  Simu5G
//
// Copyright (C) 2012-2021 Giovanni Nardini, Giovanni Stea, Antonio Virdis et al. (University of Pisa)
// Copyright (C) 2022-2026 Giovanni Nardini, Giovanni Stea et al. (University of Pisa)
//
// This file is part of a software released under the license included in file
// "license.pdf". Please read LICENSE and README files before using it.
// The above files and the present reference are part of the software itself,
// and cannot be removed from it.
//
package simu5g.stack.ip2nic;

//
// Bridges the IP network layer and the cellular protocol stack, handling bidirectional packet flow.
// Extracts flow information from IP headers and attaches it as control tags for the stack.
// In base stations, determines the destination user equipment from IP addresses.
//
// A packet whose UE is attached with neither of its stacks is dropped here. Which stack
// carries a flow follows from the UE's attachment: outside dual connectivity a UE is
// attached with at most one stack, and under dual connectivity the two stacks are the
// legs of one bearer, so the choice is made per PDU, further down, by the bearer's leg
// splitter (see ~DcPdcpLegSplitter).
//
simple Ip2Nic like INetworkLayer2CellularNic
{
    parameters:
        string nodeType;
        string binderModule = default("binder");
        string bearerConfiguratorModule = default("bearerConfigurator");
        bool isNr = default(false);   // True for the NR leg (set by NrNicUe/NrNicEnb, or in the ini for a DC master eNB)
        bool hasSdap = default(false);  // When true, SDAP handles DRB/RLC assignment; Ip2Nic skips traffic classification
        bool establishBearersOnDemand = default(true);  // When false, a packet that finds no established bearer raises an error instead of establishing one (static bearers are established up front; see the staticDrbs parameter of ~BearerConfigurator)
        @display("i=block/layer");
    gates:
        // Connection to network layer
        input upperLayerIn;
        output upperLayerOut;

        // Connection to the cellular stack
        input stackIn;
        output stackOut;
}