61 lines
1.2 KiB
Go
61 lines
1.2 KiB
Go
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package link
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import (
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"fmt"
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"github.com/cilium/ebpf"
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)
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// NetNsInfo contains metadata about a network namespace link.
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type NetNsInfo struct {
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RawLinkInfo
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}
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// NetNsLink is a program attached to a network namespace.
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type NetNsLink struct {
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*RawLink
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}
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// AttachNetNs attaches a program to a network namespace.
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func AttachNetNs(ns int, prog *ebpf.Program) (*NetNsLink, error) {
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var attach ebpf.AttachType
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switch t := prog.Type(); t {
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case ebpf.FlowDissector:
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attach = ebpf.AttachFlowDissector
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case ebpf.SkLookup:
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attach = ebpf.AttachSkLookup
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default:
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return nil, fmt.Errorf("can't attach %v to network namespace", t)
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}
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link, err := AttachRawLink(RawLinkOptions{
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Target: ns,
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Program: prog,
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Attach: attach,
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})
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if err != nil {
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return nil, err
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}
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return &NetNsLink{link}, nil
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}
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// LoadPinnedNetNs loads a network namespace link from bpffs.
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func LoadPinnedNetNs(fileName string) (*NetNsLink, error) {
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link, err := loadPinnedRawLink(fileName, NetNsType)
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if err != nil {
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return nil, err
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}
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return &NetNsLink{link}, nil
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}
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// Info returns information about the link.
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func (nns *NetNsLink) Info() (*NetNsInfo, error) {
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info, err := nns.RawLink.Info()
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if err != nil {
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return nil, err
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}
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return &NetNsInfo{*info}, nil
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}
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