gtsocial-umbx

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netns.go (705B)

      1 package link
      2 
      3 import (
      4 	"fmt"
      5 
      6 	"github.com/cilium/ebpf"
      7 )
      8 
      9 // NetNsLink is a program attached to a network namespace.
     10 type NetNsLink struct {
     11 	RawLink
     12 }
     13 
     14 // AttachNetNs attaches a program to a network namespace.
     15 func AttachNetNs(ns int, prog *ebpf.Program) (*NetNsLink, error) {
     16 	var attach ebpf.AttachType
     17 	switch t := prog.Type(); t {
     18 	case ebpf.FlowDissector:
     19 		attach = ebpf.AttachFlowDissector
     20 	case ebpf.SkLookup:
     21 		attach = ebpf.AttachSkLookup
     22 	default:
     23 		return nil, fmt.Errorf("can't attach %v to network namespace", t)
     24 	}
     25 
     26 	link, err := AttachRawLink(RawLinkOptions{
     27 		Target:  ns,
     28 		Program: prog,
     29 		Attach:  attach,
     30 	})
     31 	if err != nil {
     32 		return nil, err
     33 	}
     34 
     35 	return &NetNsLink{*link}, nil
     36 }