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https://github.com/netbirdio/netbird.git
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remove dead code
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parent
51337fbf65
commit
00f2ee34a0
@ -1,85 +0,0 @@
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package iface
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import (
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"github.com/google/nftables"
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"github.com/google/nftables/expr"
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log "github.com/sirupsen/logrus"
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"github.com/vishvananda/netns"
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"io/ioutil"
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)
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// Configure routing and IP masquerading
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//todo more docs on what exactly happens here and why it is needed
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func ConfigureNAT(primaryIface string) error {
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log.Debugf("adding NAT / IP masquerading using nftables")
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ns, err := netns.Get()
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if err != nil {
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return err
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}
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conn := nftables.Conn{NetNS: int(ns)}
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log.Debugf("flushing nftable rulesets")
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conn.FlushRuleset()
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log.Debugf("setting up nftable rules for ip masquerading")
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nat := conn.AddTable(&nftables.Table{
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Family: nftables.TableFamilyIPv4,
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Name: "nat",
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})
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conn.AddChain(&nftables.Chain{
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Name: "prerouting",
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Table: nat,
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Type: nftables.ChainTypeNAT,
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Hooknum: nftables.ChainHookPrerouting,
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Priority: nftables.ChainPriorityFilter,
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})
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post := conn.AddChain(&nftables.Chain{
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Name: "postrouting",
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Table: nat,
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Type: nftables.ChainTypeNAT,
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Hooknum: nftables.ChainHookPostrouting,
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Priority: nftables.ChainPriorityNATSource,
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})
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conn.AddRule(&nftables.Rule{
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Table: nat,
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Chain: post,
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Exprs: []expr.Any{
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&expr.Meta{Key: expr.MetaKeyOIFNAME, Register: 1},
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&expr.Cmp{
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Op: expr.CmpOpEq,
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Register: 1,
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Data: ifname(primaryIface),
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},
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&expr.Masq{},
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},
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})
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if err := conn.Flush(); err != nil {
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return err
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}
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return nil
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}
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// Enables IP forwarding system property.
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// Mostly used when you setup one peer as a VPN server.
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func EnableIPForward() error {
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f := "/proc/sys/net/ipv4/ip_forward"
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content, err := ioutil.ReadFile(f)
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if err != nil {
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return err
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}
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if string(content) == "0\n" {
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log.Info("enabling IP Forward")
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return ioutil.WriteFile(f, []byte("1"), 0600)
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}
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return nil
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}
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