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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,11 @@ | ||
| control: | ||
| uri: "http://192.0.2.2:8080" | ||
| bind-addr: "192.0.2.2:8080" | ||
| ran: | ||
| bind-addr: "198.51.100.2:1234" | ||
| cp: | ||
| uri: "http://192.0.2.3:8080" | ||
| gtp: "198.51.100.10" | ||
|
|
||
| logger: | ||
| level: "debug" | ||
| level: "trace" |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| // Copyright 2024 Louis Royer and the NextMN contributors. All rights reserved. | ||
| // Use of this source code is governed by a MIT-style license that can be | ||
| // found in the LICENSE file. | ||
| // SPDX-License-Identifier: MIT | ||
|
|
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| package app | ||
|
|
||
| import ( | ||
| "context" | ||
| "net" | ||
| "net/netip" | ||
|
|
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| "github.com/sirupsen/logrus" | ||
| "github.com/wmnsk/go-gtp/gtpv1" | ||
| "github.com/wmnsk/go-gtp/gtpv1/message" | ||
| ) | ||
|
|
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| const GTPU_PORT = 2152 | ||
|
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| func (s *Setup) StartGtpUProtocolEntity(ctx context.Context, ipAddress netip.Addr) error { | ||
| logrus.WithFields(logrus.Fields{"listen-addr": ipAddress}).Info("Creating new GTP-U Protocol Entity") | ||
| laddr := net.UDPAddrFromAddrPort(netip.AddrPortFrom(ipAddress, GTPU_PORT)) | ||
| uConn := gtpv1.NewUPlaneConn(laddr) | ||
| uConn.DisableErrorIndication() | ||
| uConn.AddHandler(message.MsgTypeTPDU, func(c gtpv1.Conn, senderAddr net.Addr, msg message.Message) error { | ||
| return tpduHandler(c, senderAddr, msg, s.psMan, s.rDaemon) | ||
| }) | ||
| go func(ctx context.Context) error { | ||
| defer uConn.Close() | ||
| if err := uConn.ListenAndServe(ctx); err != nil { | ||
| logrus.WithError(err).Trace("GTP uConn closed") | ||
| return err | ||
| } | ||
| logrus.Trace("GTP uConn closed") | ||
| return nil | ||
| }(ctx) | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| // handle GTP PDU (Downlink) | ||
| func tpduHandler(c gtpv1.Conn, senderAddr net.Addr, msg message.Message, psMan *PduSessionsManager, rDaemon *RadioDaemon) error { | ||
| teid := msg.TEID() | ||
| ue, err := psMan.GetUECtrl(teid) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| packet := msg.(*message.TPDU).Decapsulate() | ||
| return rDaemon.WriteDownlink(packet, ue) | ||
| } |
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