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|
package conn
import (
"encoding/binary"
"net"
"testing"
"golang.org/x/net/ipv6"
)
func TestStdNetBindReceiveFuncAfterClose(t *testing.T) {
bind := NewStdNetBind().(*StdNetBind)
fns, _, err := bind.Open(0)
if err != nil {
t.Fatal(err)
}
bind.Close()
bufs := make([][]byte, 1)
bufs[0] = make([]byte, 1)
sizes := make([]int, 1)
eps := make([]Endpoint, 1)
for _, fn := range fns {
// The ReceiveFuncs must not access conn-related fields on StdNetBind
// unguarded. Close() nils the conn-related fields resulting in a panic
// if they violate the mutex.
fn(bufs, sizes, eps)
}
}
func mockSetGSOSize(control *[]byte, gsoSize uint16) {
*control = (*control)[:cap(*control)]
binary.LittleEndian.PutUint16(*control, gsoSize)
}
func Test_coalesceMessages(t *testing.T) {
cases := []struct {
name string
buffs [][]byte
wantLens []int
wantGSO []int
}{
{
name: "one message no coalesce",
buffs: [][]byte{
make([]byte, 1, 1),
},
wantLens: []int{1},
wantGSO: []int{0},
},
{
name: "two messages equal len coalesce",
buffs: [][]byte{
make([]byte, 1, 2),
make([]byte, 1, 1),
},
wantLens: []int{2},
wantGSO: []int{1},
},
{
name: "two messages unequal len coalesce",
buffs: [][]byte{
make([]byte, 2, 3),
make([]byte, 1, 1),
},
wantLens: []int{3},
wantGSO: []int{2},
},
{
name: "three messages second unequal len coalesce",
buffs: [][]byte{
make([]byte, 2, 3),
make([]byte, 1, 1),
make([]byte, 2, 2),
},
wantLens: []int{3, 2},
wantGSO: []int{2, 0},
},
{
name: "three messages limited cap coalesce",
buffs: [][]byte{
make([]byte, 2, 4),
make([]byte, 2, 2),
make([]byte, 2, 2),
},
wantLens: []int{4, 2},
wantGSO: []int{2, 0},
},
}
for _, tt := range cases {
t.Run(tt.name, func(t *testing.T) {
addr := &net.UDPAddr{
IP: net.ParseIP("127.0.0.1").To4(),
Port: 1,
}
msgs := make([]ipv6.Message, len(tt.buffs))
for i := range msgs {
msgs[i].Buffers = make([][]byte, 1)
msgs[i].OOB = make([]byte, 0, 2)
}
got := coalesceMessages(addr, &StdNetEndpoint{AddrPort: addr.AddrPort()}, tt.buffs, msgs, mockSetGSOSize)
if got != len(tt.wantLens) {
t.Fatalf("got len %d want: %d", got, len(tt.wantLens))
}
for i := 0; i < got; i++ {
if msgs[i].Addr != addr {
t.Errorf("msgs[%d].Addr != passed addr", i)
}
gotLen := len(msgs[i].Buffers[0])
if gotLen != tt.wantLens[i] {
t.Errorf("len(msgs[%d].Buffers[0]) %d != %d", i, gotLen, tt.wantLens[i])
}
gotGSO, err := mockGetGSOSize(msgs[i].OOB)
if err != nil {
t.Fatalf("msgs[%d] getGSOSize err: %v", i, err)
}
if gotGSO != tt.wantGSO[i] {
t.Errorf("msgs[%d] gsoSize %d != %d", i, gotGSO, tt.wantGSO[i])
}
}
})
}
}
func mockGetGSOSize(control []byte) (int, error) {
if len(control) < 2 {
return 0, nil
}
return int(binary.LittleEndian.Uint16(control)), nil
}
func Test_splitCoalescedMessages(t *testing.T) {
newMsg := func(n, gso int) ipv6.Message {
msg := ipv6.Message{
Buffers: [][]byte{make([]byte, 1<<16-1)},
N: n,
OOB: make([]byte, 2),
}
binary.LittleEndian.PutUint16(msg.OOB, uint16(gso))
if gso > 0 {
msg.NN = 2
}
return msg
}
cases := []struct {
name string
msgs []ipv6.Message
firstMsgAt int
wantNumEval int
wantMsgLens []int
wantErr bool
}{
{
name: "second last split last empty",
msgs: []ipv6.Message{
newMsg(0, 0),
newMsg(0, 0),
newMsg(3, 1),
newMsg(0, 0),
},
firstMsgAt: 2,
wantNumEval: 3,
wantMsgLens: []int{1, 1, 1, 0},
wantErr: false,
},
{
name: "second last no split last empty",
msgs: []ipv6.Message{
newMsg(0, 0),
newMsg(0, 0),
newMsg(1, 0),
newMsg(0, 0),
},
firstMsgAt: 2,
wantNumEval: 1,
wantMsgLens: []int{1, 0, 0, 0},
wantErr: false,
},
{
name: "second last no split last no split",
msgs: []ipv6.Message{
newMsg(0, 0),
newMsg(0, 0),
newMsg(1, 0),
newMsg(1, 0),
},
firstMsgAt: 2,
wantNumEval: 2,
wantMsgLens: []int{1, 1, 0, 0},
wantErr: false,
},
{
name: "second last no split last split",
msgs: []ipv6.Message{
newMsg(0, 0),
newMsg(0, 0),
newMsg(1, 0),
newMsg(3, 1),
},
firstMsgAt: 2,
wantNumEval: 4,
wantMsgLens: []int{1, 1, 1, 1},
wantErr: false,
},
{
name: "second last split last split",
msgs: []ipv6.Message{
newMsg(0, 0),
newMsg(0, 0),
newMsg(2, 1),
newMsg(2, 1),
},
firstMsgAt: 2,
wantNumEval: 4,
wantMsgLens: []int{1, 1, 1, 1},
wantErr: false,
},
{
name: "second last no split last split overflow",
msgs: []ipv6.Message{
newMsg(0, 0),
newMsg(0, 0),
newMsg(1, 0),
newMsg(4, 1),
},
firstMsgAt: 2,
wantNumEval: 4,
wantMsgLens: []int{1, 1, 1, 1},
wantErr: true,
},
}
for _, tt := range cases {
t.Run(tt.name, func(t *testing.T) {
got, err := splitCoalescedMessages(tt.msgs, 2, mockGetGSOSize)
if err != nil && !tt.wantErr {
t.Fatalf("err: %v", err)
}
if got != tt.wantNumEval {
t.Fatalf("got to eval: %d want: %d", got, tt.wantNumEval)
}
for i, msg := range tt.msgs {
if msg.N != tt.wantMsgLens[i] {
t.Fatalf("msg[%d].N: %d want: %d", i, msg.N, tt.wantMsgLens[i])
}
}
})
}
}
|
