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remove legacy remnants and move ip,udp,ethernet logic into subpackages

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This commit is contained in:
soypat
2025-02-20 16:00:55 -03:00
parent 0606a04f45
commit f86bb6f01a
22 changed files with 590 additions and 1885 deletions
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tcp/frame.go
+14 -8
View File
@@ -9,14 +9,6 @@ import (
"github.com/soypat/lneto/lneto2"
)
var (
errShortTCP = errors.New("TCP offset exceeds frame")
errBadTCPOff = errors.New("TCP offset invalid")
errEvilPacket = errors.New("evil packet")
errZeroDstPort = errors.New("TCP zero destination port")
errZeroSrcPort = errors.New("TCP zero source port")
)
const (
sizeHeaderTCP = 20
)
@@ -148,6 +140,12 @@ func (tfrm Frame) Segment(payloadSize int) Segment {
}
}
func (tfrm Frame) CRCWrite(crc *lneto2.CRC791) {
// Write excluding CRC
crc.Write(tfrm.buf[:16])
crc.Write(tfrm.buf[18:])
}
// SetSegment sets the sequence, acknowledgment, offset, window and flag fields of the TCP header from the the [Segment].
// Offset, like in [Frame.SetOffset], is expressed in words with minimum being 5.
func (tfrm Frame) SetSegment(seg Segment, offset uint8) {
@@ -184,6 +182,14 @@ func (tfrm Frame) String() string {
// Validation API
//
var (
errShortTCP = errors.New("TCP offset exceeds frame")
errBadTCPOff = errors.New("TCP offset invalid")
errEvilPacket = errors.New("evil packet")
errZeroDstPort = errors.New("TCP zero destination port")
errZeroSrcPort = errors.New("TCP zero source port")
)
// func (tfrm Frame) Validate(v *lneto2.Validator) {
// tfrm.ValidateSize(v)
// tfrm.ValidateExceptCRC(v)
tcp/tcp_test.go
+8 -6
View File
@@ -5,7 +5,9 @@ import (
"strconv"
"testing"
"github.com/soypat/lneto"
"github.com/soypat/lneto/ethernet"
"github.com/soypat/lneto/ipv4"
"github.com/soypat/lneto/lneto2"
"github.com/soypat/lneto/tcp"
)
@@ -584,20 +586,20 @@ func TestExchange_helloworld_client(t *testing.T) {
}
func parseSegment(t *testing.T, b []byte) (tcp.Segment, []byte) {
var vld lneto.Validator
var vld lneto2.Validator
t.Helper()
efrm, err := lneto.NewEthFrame(b)
efrm, err := ethernet.NewFrame(b)
if err != nil {
t.Fatal(err)
}
if efrm.EtherTypeOrSize() != lneto.EtherTypeIPv4 {
if efrm.EtherTypeOrSize() != ethernet.TypeIPv4 {
t.Fatalf("not IPv4")
}
efrm.ValidateSize(&vld)
if err := vld.Err(); err != nil {
t.Fatal(vld.Err())
}
ifrm, err := lneto.NewIPv4Frame(efrm.Payload())
ifrm, err := ipv4.NewFrame(efrm.Payload())
if err != nil {
t.Fatal(err)
}
@@ -614,7 +616,7 @@ func parseSegment(t *testing.T, b []byte) (tcp.Segment, []byte) {
}
ipl := ifrm.Payload()
tfrm, err := lneto.NewTCPFrame(ipl)
tfrm, err := tcp.NewFrame(ipl)
if err != nil {
t.Fatal(err)
}