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V2 Netbird integration - UDP MIMO/SIMO, ICMPv6, DHCPv6 implementations (#106)

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* begin adding udp.MuxHandler

* add udp MuxHandlerSIMO/MIMO

* add tcp rx shutdown

* icmpv6 client

* icmpv6 Client shared NDP/Echo preparation

* icmpv6 client ndp/echo split

* icmpv6 client ndp/echo split done

* icmpv6 adjustments

* add dhcpv6 stubs

* dhcpv4 preliminary revision

* add dns.NextLabel

* dns label name tweaks

* dns begin work on TCP client

* add dnstcp package

* apply gofmt changes

* add udp mux tests

* clean up, remove StackBig for now

* remove dnstcp so as to merged confident parts and we continue dnstcp work elsewhere
This commit is contained in:
Pat Whittingslow
2026-05-10 12:16:30 -03:00
committed by GitHub
parent bdbd38ab44
commit 7d5830d7ab
22 changed files with 2785 additions and 75 deletions
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dns/client.go
+10 -20
View File
@@ -15,7 +15,7 @@ type Client struct {
lport uint16
msg Message
respFlags HeaderFlags
state clientState
state StateClientQuery
enableRecursion bool
}
@@ -36,7 +36,7 @@ func (c *Client) StartResolve(localPort, txid uint16, cfg ResolveConfig) error {
if nd > math.MaxUint16 {
return lneto.ErrInvalidConfig
}
c.reset(localPort, txid, dnsSendQuery, cfg.EnableRecursion)
c.reset(localPort, txid, CQueryPending, cfg.EnableRecursion)
c.msg.LimitResourceDecoding(uint16(nd), uint16(nd), 0, 0)
c.msg.AddQuestions(cfg.Questions)
c.msg.AddAdditionals(cfg.Additional)
@@ -46,7 +46,7 @@ func (c *Client) StartResolve(localPort, txid uint16, cfg ResolveConfig) error {
func (c *Client) Encapsulate(carrierData []byte, offsetToIP, offsetToFrame int) (int, error) {
if c.isClosed() {
return 0, net.ErrClosed
} else if c.state != dnsSendQuery {
} else if c.state != CQueryPending {
return 0, nil
}
@@ -64,7 +64,7 @@ func (c *Client) Encapsulate(carrierData []byte, offsetToIP, offsetToFrame int)
internal.LogAttrs(nil, slog.LevelError, "dns:unexpected-write", slog.Int("got", len(data)), slog.Int("want", int(msglen)))
return 0, lneto.ErrBug
}
c.state = dnsAwaitResponse
c.state = CQueryOutstanding
// Unset don't frag since DNS requests go through LOTS of nodes.
// if frameOffset >= 28 {
// version := carrierData[0] >> 4
@@ -78,7 +78,7 @@ func (c *Client) Encapsulate(carrierData []byte, offsetToIP, offsetToFrame int)
func (c *Client) Demux(carrierData []byte, frameOffset int) error {
if c.isClosed() {
return net.ErrClosed
} else if c.state != dnsAwaitResponse {
} else if c.state != CQueryOutstanding {
return nil
}
frame := carrierData[frameOffset:]
@@ -91,7 +91,7 @@ func (c *Client) Demux(carrierData []byte, frameOffset int) error {
return nil // Not meant for our client.
}
c.respFlags = flags
c.state = dnsDone
c.state = CQueryDone
msg := &c.msg
_, incompleteButOK, err := msg.Decode(frame)
if err != nil && !incompleteButOK {
@@ -101,7 +101,7 @@ func (c *Client) Demux(carrierData []byte, frameOffset int) error {
}
func (c *Client) isClosed() bool {
return c.state == dnsClosed || c.state == dnsAborted
return c.state == CQueryIdle || c.state == CQueryAborted
}
func (c *Client) MessageCopyTo(dst *Message) (done bool, err error) {
@@ -117,17 +117,17 @@ func (c *Client) MessageCopyTo(dst *Message) (done bool, err error) {
}
func (c *Client) Answers() []Resource {
if c.state != dnsDone {
if c.state != CQueryDone {
return nil
}
return c.msg.Answers
}
func (c *Client) Abort() {
c.reset(0, 0, 0, false)
c.reset(0, 0, CQueryAborted, false)
}
func (c *Client) reset(lport, txid uint16, state clientState, enableRecursion bool) {
func (c *Client) reset(lport, txid uint16, state StateClientQuery, enableRecursion bool) {
*c = Client{
connID: c.connID + 1,
lport: lport,
@@ -138,13 +138,3 @@ func (c *Client) reset(lport, txid uint16, state clientState, enableRecursion bo
}
c.msg.Reset()
}
type clientState uint8
const (
dnsClosed clientState = iota
dnsSendQuery
dnsAwaitResponse
dnsDone
dnsAborted
)