Initial commit

.gitignore

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+nextmn-srv6-ctlr
+!bash-completion/completions/nextmn-srv6-ctlr

LICENSE

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+MIT License
+
+Copyright © 2023 Louis Royer
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

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+prefix = /usr/local
+exec_prefix = $(prefix)
+bindir = $(exec_prefix)/bin
+BASHCOMPLETIONSDIR = $(exec_prefix)/share/bash-completion/completions
+
+
+RM = rm -f
+INSTALL = install -D
+
+.PHONY: install uninstall update build clean default
+default: build
+build:
+	go build
+clean:
+	go clean
+reinstall: uninstall install
+update:
+	go get -u github.com/louisroyer/go-pfcp-networking@master
+	go mod tidy
+install:
+	$(INSTALL) nextmn-srv6-ctrl $(DESTDIR)$(bindir)/nextmn-srv6-ctrl
+	$(INSTALL) bash-completion/completions/nextmn-srv6-ctrl $(DESTDIR)$(BASHCOMPLETIONSDIR)/nextmn-srv6-ctrl
+	@echo "================================="
+	@echo ">> Now run the following command:"
+	@echo "\tsource $(DESTDIR)$(BASHCOMPLETIONSDIR)/nextmn-srv6-ctrl"
+	@echo "================================="
+uninstall:
+	$(RM) $(DESTDIR)$(bindir)/nextmn-srv6-ctrl
+	$(RM) $(DESTDIR)$(BASHCOMPLETIONSDIR)/nextmn-srv6-ctrl

README.md

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+# NextMN-SRv6-ctrl
+NextMN-SRv6-ctrl is a controller for NextMN-SRv6. It acts as a dummy UPF.
+
+## Getting started
+### Build dependencies
+- golang
+- make (optional)
+
+### Build and install
+Simply run `make build` and `make install`.
+
+
+## Author
+Louis Royer
+
+## License
+MIT

bash-completion/completions/nextmn-srv6-ctlr

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+#! /bin/bash
+
+: ${PROG:=$(basename ${BASH_SOURCE})}
+
+_cli_bash_autocomplete() {
+  if [[ "${COMP_WORDS[0]}" != "source" ]]; then
+    local cur opts base
+    COMPREPLY=()
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    if [[ "$cur" == "-"* ]]; then
+      opts=$( ${COMP_WORDS[@]:0:$COMP_CWORD} ${cur} --generate-bash-completion )
+    else
+      opts=$( ${COMP_WORDS[@]:0:$COMP_CWORD} --generate-bash-completion )
+    fi
+    COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+    return 0
+  fi
+}
+
+complete -o bashdefault -o default -o nospace -F _cli_bash_autocomplete $PROG
+unset PROG

config/config.yaml

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+pfcp-address: "10.0.60.3"

go.mod

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+module github.com/louisroyer/nextmn-srv6-ctrl
+
+go 1.15
+
+require (
+	github.com/cpuguy83/go-md2man/v2 v2.0.1 // indirect
+	github.com/louisroyer/go-pfcp-networking v0.0.24-0.20230113122010-1b98989277a2
+	github.com/urfave/cli/v2 v2.3.0
+	github.com/vishvananda/netns v0.0.0-20211101163701-50045581ed74 // indirect
+	golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect
+	golang.org/x/sys v0.0.0-20220209214540-3681064d5158 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
+)

main.go

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+// Copyright 2023 Louis Royer and the NextMN-SRv6-ctrl 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
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	ctrl "github.com/louisroyer/nextmn-srv6-ctrl/runtime"
+	"github.com/urfave/cli/v2"
+)
+
+func initSignals() {
+	cancelChan := make(chan os.Signal, 1)
+	signal.Notify(cancelChan, syscall.SIGTERM, syscall.SIGINT)
+	func(_ os.Signal) {}(<-cancelChan)
+	ctrl.Exit()
+	os.Exit(0)
+}
+
+func main() {
+	log.SetPrefix("[nextmn-upf] ")
+	var config string
+	app := &cli.App{
+		Name:                 "NextMN-SRv6-ctrl",
+		Usage:                "Controller for NextMN-SRv6",
+		EnableBashCompletion: true,
+		Authors: []*cli.Author{
+			{Name: "Louis Royer"},
+		},
+		Flags: []cli.Flag{
+			&cli.StringFlag{
+				Name:        "config",
+				Aliases:     []string{"c"},
+				Usage:       "Load configuration from `FILE`",
+				Destination: &config,
+				Required:    true,
+				DefaultText: "not set",
+			},
+		},
+		Action: func(c *cli.Context) error {
+			err := ctrl.ParseConf(config)
+			if err != nil {
+				fmt.Println("Error loading config, exiting…")
+				os.Exit(1)
+			}
+			err = ctrl.Run()
+			if err != nil {
+				fmt.Println("Error while running, exiting…")
+				log.Fatal(err)
+				os.Exit(2)
+			}
+			return nil
+		},
+	}
+	go initSignals()
+	err := app.Run(os.Args)
+	if err != nil {
+		log.Fatal(err)
+	}
+}

runtime/config.go

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+// Copyright 2023 Louis Royer and the NextMN-SRv6-ctrl 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
+package ctrl
+
+import (
+	"io/ioutil"
+	"path/filepath"
+
+	"gopkg.in/yaml.v3"
+)
+
+func ParseConf(file string) error {
+	path, err := filepath.Abs(file)
+	yamlFile, err := ioutil.ReadFile(path)
+	if err != nil {
+		return err
+	}
+	err = yaml.Unmarshal(yamlFile, &Ctrl)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+type CtrlConfig struct {
+	PFCPAddress *string `yaml:"pfcp-address,omitempty"`
+}

runtime/upf.go

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+// Copyright 2023 Louis Royer and the NextMN-SRv6-ctrl 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
+package ctrl
+
+import (
+	"fmt"
+
+	pfcp_networking "github.com/louisroyer/go-pfcp-networking/pfcp"
+)
+
+var Ctrl *CtrlConfig
+var PFCPServer *pfcp_networking.PFCPEntityUP
+
+func Run() error {
+	err := createPFCPNode()
+	if err != nil {
+		return err
+	}
+	for {
+		select {}
+	}
+	return nil
+}
+
+func createPFCPNode() error {
+	if Ctrl.PFCPAddress == nil {
+		return fmt.Errorf("Missing pfcp address")
+	}
+	PFCPServer = pfcp_networking.NewPFCPEntityUP(*Ctrl.PFCPAddress)
+	PFCPServer.Start()
+	return nil
+}
+
+func Exit() error {
+	return nil
+}