f-14: bin: add a new binarie for test #14

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

cmd/vpc/main.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+
+	"git.g3e.fr/syonad/two/internal/netif"
+)
+
+var (
+	netns  = flag.String("netns", "", "Network namespace à faire")
+	name   = flag.String("name", "", "interface name")
+	action = flag.String("action", "", "Action a faire")
+)
+
+func main() {
+	flag.Parse()
+
+	switch *action {
+	case "create":
+		err := netif.CreateVethToNetns("veth"+*name+"ext", "veth"+*name+"int", "/var/run/netns/"+*netns, 9000)
+		if err != nil {
+			fmt.Println(err)
+		}
+	default:
+		fmt.Printf("Available commande:\n - create\n - delete\n - check\n")
+		os.Exit(1)
+	}
+}

go.mod

@@ -25,6 +25,8 @@ require (
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/spf13/viper v1.21.0 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
+	github.com/vishvananda/netlink v1.3.1 // indirect
+	github.com/vishvananda/netns v0.0.5 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
 	go.opentelemetry.io/otel v1.37.0 // indirect
 	go.opentelemetry.io/otel/metric v1.37.0 // indirect

go.sum

@@ -39,6 +39,10 @@ github.com/spf13/viper v1.21.0 h1:x5S+0EU27Lbphp4UKm1C+1oQO+rKx36vfCoaVebLFSU=
 github.com/spf13/viper v1.21.0/go.mod h1:P0lhsswPGWD/1lZJ9ny3fYnVqxiegrlNrEmgLjbTCAY=
 github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8=
 github.com/subosito/gotenv v1.6.0/go.mod h1:Dk4QP5c2W3ibzajGcXpNraDfq2IrhjMIvMSWPKKo0FU=
+github.com/vishvananda/netlink v1.3.1 h1:3AEMt62VKqz90r0tmNhog0r/PpWKmrEShJU0wJW6bV0=
+github.com/vishvananda/netlink v1.3.1/go.mod h1:ARtKouGSTGchR8aMwmkzC0qiNPrrWO5JS/XMVl45+b4=
+github.com/vishvananda/netns v0.0.5 h1:DfiHV+j8bA32MFM7bfEunvT8IAqQ/NzSJHtcmW5zdEY=
+github.com/vishvananda/netns v0.0.5/go.mod h1:SpkAiCQRtJ6TvvxPnOSyH3BMl6unz3xZlaprSwhNNJM=
 go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
 go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
 go.opentelemetry.io/otel v1.37.0 h1:9zhNfelUvx0KBfu/gb+ZgeAfAgtWrfHJZcAqFC228wQ=
@@ -51,6 +55,8 @@ go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
 go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
 golang.org/x/net v0.41.0 h1:vBTly1HeNPEn3wtREYfy4GZ/NECgw2Cnl+nK6Nz3uvw=
 golang.org/x/net v0.41.0/go.mod h1:B/K4NNqkfmg07DQYrbwvSluqCJOOXwUjeb/5lOisjbA=
+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.34.0 h1:H5Y5sJ2L2JRdyv7ROF1he/lPdvFsd0mJHFw2ThKHxLA=
 golang.org/x/sys v0.34.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/sys v0.39.0 h1:CvCKL8MeisomCi6qNZ+wbb0DN9E5AATixKsvNtMoMFk=

internal/netif/veth.go

@@ -0,0 +1,48 @@
+package netif
+
+import (
+	"fmt"
+	"runtime"
+
+	"github.com/vishvananda/netlink"
+	"github.com/vishvananda/netns"
+)
+
+func CreateVethToNetns(rootIf, nsIf, netnsPath string, mtu int) error {
+	// Obligatoire : netns lié au thread
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	// Ouvrir le netns cible
+	ns, err := netns.GetFromPath(netnsPath)
+	if err != nil {
+		return fmt.Errorf("open netns: %w, %s", err, netnsPath)
+	}
+	defer ns.Close()
+
+	// Créer le veth dans le netns courant
+	veth := &netlink.Veth{
+		LinkAttrs: netlink.LinkAttrs{
+			Name: rootIf,
+			MTU:  mtu,
+		},
+		PeerName: nsIf,
+	}
+
+	if err := netlink.LinkAdd(veth); err != nil {
+		return fmt.Errorf("link add: %w", err)
+	}
+
+	// Récupérer l'interface peer
+	peer, err := netlink.LinkByName(nsIf)
+	if err != nil {
+		return fmt.Errorf("peer not found: %w", err)
+	}
+
+	// Déplacer le peer dans le netns cible
+	if err := netlink.LinkSetNsFd(peer, int(ns)); err != nil {
+		return fmt.Errorf("set ns: %w", err)
+	}
+
+	return nil
+}