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what about with bad GRO on UDP

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This commit is contained in:
JackDoan 2025-11-10 14:47:38 -06:00
parent 42591c2042
commit c645a45438
8 changed files with 411 additions and 223 deletions
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31
interface.go
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@ -18,6 +18,7 @@ import (
"github.com/slackhq/nebula/firewall"
"github.com/slackhq/nebula/header"
"github.com/slackhq/nebula/overlay"
"github.com/slackhq/nebula/packet"
"github.com/slackhq/nebula/udp"
)
@ -268,12 +269,9 @@ func (f *Interface) listenOut(q int) {
ctCache := firewall.NewConntrackCacheTicker(f.conntrackCacheTimeout)
lhh := f.lightHouse.NewRequestHandler()
plaintexts := make([][]byte, batch)
outNeedsTun := make([]*int, batch)
outPackets := make([]*packet.OutPacket, batch)
for i := 0; i < batch; i++ {
plaintexts[i] = make([]byte, udp.MTU)
outNeedsTun[i] = new(int)
*outNeedsTun[i] = -1
outPackets[i] = packet.NewOut()
}
h := &header.H{}
@ -282,16 +280,23 @@ func (f *Interface) listenOut(q int) {
toSend := make([][]byte, batch)
li.ListenOut(func(fromUdpAddrs []netip.AddrPort, payloads [][]byte) {
li.ListenOut(func(pkts []*packet.Packet) {
toSend = toSend[:0]
for i := range plaintexts {
plaintexts[i] = plaintexts[i][:0]
for i := range outPackets {
outPackets[i].Valid = false
outPackets[i].SegCounter = 0
}
f.readOutsidePacketsMany(fromUdpAddrs, plaintexts, outNeedsTun, payloads, h, fwPacket, lhh, nb, q, ctCache.Get(f.l))
for i := range plaintexts {
if *outNeedsTun[i] != -1 {
toSend = append(toSend, plaintexts[i][:*outNeedsTun[i]])
*outNeedsTun[i] = -1
f.readOutsidePacketsMany(pkts, outPackets, h, fwPacket, lhh, nb, q, ctCache.Get(f.l))
for i := range outPackets {
if pkts[i].OutLen != -1 {
for j := 0; j < outPackets[i].SegCounter; j++ {
if len(outPackets[i].Segments[j]) > 0 {
toSend = append(toSend, outPackets[i].Segments[j])
}
}
//toSend = append(toSend, outPackets[i])
//toSendCount++
}
}