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-rw-r--r--pkg/tcpip/tcpip.go1
-rw-r--r--pkg/tcpip/transport/tcp/endpoint_state.go1
-rw-r--r--pkg/tcpip/transport/udp/endpoint.go17
-rw-r--r--pkg/tcpip/transport/udp/endpoint_state.go2
-rw-r--r--pkg/tcpip/transport/udp/udp_test.go58
5 files changed, 56 insertions, 23 deletions
diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index 707fda4d2..cf25a086d 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -76,6 +76,7 @@ var (
ErrInvalidOptionValue = &Error{"invalid option value specified"}
ErrNoLinkAddress = &Error{"no remote link address"}
ErrBadAddress = &Error{"bad address"}
+ ErrNetworkUnreachable = &Error{"network is unreachable"}
)
// Errors related to Subnet
diff --git a/pkg/tcpip/transport/tcp/endpoint_state.go b/pkg/tcpip/transport/tcp/endpoint_state.go
index 212d2513a..b1e249bff 100644
--- a/pkg/tcpip/transport/tcp/endpoint_state.go
+++ b/pkg/tcpip/transport/tcp/endpoint_state.go
@@ -213,6 +213,7 @@ func loadError(s string) *tcpip.Error {
tcpip.ErrInvalidOptionValue,
tcpip.ErrNoLinkAddress,
tcpip.ErrBadAddress,
+ tcpip.ErrNetworkUnreachable,
}
messageToError = make(map[string]*tcpip.Error)
diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go
index f86fc6d5a..6fcddd028 100644
--- a/pkg/tcpip/transport/udp/endpoint.go
+++ b/pkg/tcpip/transport/udp/endpoint.go
@@ -62,7 +62,6 @@ type endpoint struct {
id stack.TransportEndpointID
state endpointState
bindNICID tcpip.NICID
- bindAddr tcpip.Address
regNICID tcpip.NICID
route stack.Route `state:"manual"`
dstPort uint16
@@ -267,13 +266,13 @@ func (e *endpoint) Write(p tcpip.Payload, opts tcpip.WriteOptions) (uintptr, *tc
toCopy := *to
to = &toCopy
- netProto, err := e.checkV4Mapped(to, true)
+ netProto, err := e.checkV4Mapped(to, false)
if err != nil {
return 0, err
}
// Find the enpoint.
- r, err := e.stack.FindRoute(nicid, e.bindAddr, to.Addr, netProto)
+ r, err := e.stack.FindRoute(nicid, e.id.LocalAddress, to.Addr, netProto)
if err != nil {
return 0, err
}
@@ -439,11 +438,16 @@ func (e *endpoint) checkV4Mapped(addr *tcpip.FullAddress, allowMismatch bool) (t
if addr.Addr == "\x00\x00\x00\x00" {
addr.Addr = ""
}
+
+ // Fail if we are bound to an IPv6 address.
+ if !allowMismatch && len(e.id.LocalAddress) == 16 {
+ return 0, tcpip.ErrNetworkUnreachable
+ }
}
// Fail if we're bound to an address length different from the one we're
// checking.
- if l := len(e.id.LocalAddress); !allowMismatch && l != 0 && l != len(addr.Addr) {
+ if l := len(e.id.LocalAddress); l != 0 && l != len(addr.Addr) {
return 0, tcpip.ErrInvalidEndpointState
}
@@ -485,7 +489,7 @@ func (e *endpoint) Connect(addr tcpip.FullAddress) *tcpip.Error {
}
// Find a route to the desired destination.
- r, err := e.stack.FindRoute(nicid, e.bindAddr, addr.Addr, netProto)
+ r, err := e.stack.FindRoute(nicid, e.id.LocalAddress, addr.Addr, netProto)
if err != nil {
return err
}
@@ -605,7 +609,7 @@ func (e *endpoint) bindLocked(addr tcpip.FullAddress, commit func() *tcpip.Error
return tcpip.ErrInvalidEndpointState
}
- netProto, err := e.checkV4Mapped(&addr, false)
+ netProto, err := e.checkV4Mapped(&addr, true)
if err != nil {
return err
}
@@ -670,7 +674,6 @@ func (e *endpoint) Bind(addr tcpip.FullAddress, commit func() *tcpip.Error) *tcp
}
e.bindNICID = addr.NIC
- e.bindAddr = addr.Addr
return nil
}
diff --git a/pkg/tcpip/transport/udp/endpoint_state.go b/pkg/tcpip/transport/udp/endpoint_state.go
index e20d59ca3..93784fb05 100644
--- a/pkg/tcpip/transport/udp/endpoint_state.go
+++ b/pkg/tcpip/transport/udp/endpoint_state.go
@@ -72,7 +72,7 @@ func (e *endpoint) afterLoad() {
var err *tcpip.Error
if e.state == stateConnected {
- e.route, err = e.stack.FindRoute(e.regNICID, e.bindAddr, e.id.RemoteAddress, netProto)
+ e.route, err = e.stack.FindRoute(e.regNICID, e.id.LocalAddress, e.id.RemoteAddress, netProto)
if err != nil {
panic(*err)
}
diff --git a/pkg/tcpip/transport/udp/udp_test.go b/pkg/tcpip/transport/udp/udp_test.go
index 1eb9ecb80..cc342c69b 100644
--- a/pkg/tcpip/transport/udp/udp_test.go
+++ b/pkg/tcpip/transport/udp/udp_test.go
@@ -401,7 +401,7 @@ func TestV4ReadOnV4(t *testing.T) {
testV4Read(c)
}
-func testDualWrite(c *testContext) uint16 {
+func testV4Write(c *testContext) uint16 {
// Write to V4 mapped address.
payload := buffer.View(newPayload())
n, err := c.ep.Write(tcpip.SlicePayload(payload), tcpip.WriteOptions{
@@ -423,16 +423,18 @@ func testDualWrite(c *testContext) uint16 {
),
)
- port := udp.SourcePort()
-
// Check the payload.
if !bytes.Equal(payload, udp.Payload()) {
c.t.Fatalf("Bad payload: got %x, want %x", udp.Payload(), payload)
}
+ return udp.SourcePort()
+}
+
+func testV6Write(c *testContext) uint16 {
// Write to v6 address.
- payload = buffer.View(newPayload())
- n, err = c.ep.Write(tcpip.SlicePayload(payload), tcpip.WriteOptions{
+ payload := buffer.View(newPayload())
+ n, err := c.ep.Write(tcpip.SlicePayload(payload), tcpip.WriteOptions{
To: &tcpip.FullAddress{Addr: testV6Addr, Port: testPort},
})
if err != nil {
@@ -442,14 +444,12 @@ func testDualWrite(c *testContext) uint16 {
c.t.Fatalf("Bad number of bytes written: got %v, want %v", n, len(payload))
}
- // Check that we received the packet, and that the source port is the
- // same as the one used in ipv4.
- b = c.getV6Packet()
- udp = header.UDP(header.IPv6(b).Payload())
+ // Check that we received the packet.
+ b := c.getV6Packet()
+ udp := header.UDP(header.IPv6(b).Payload())
checker.IPv6(c.t, b,
checker.UDP(
checker.DstPort(testPort),
- checker.SrcPort(port),
),
)
@@ -458,7 +458,17 @@ func testDualWrite(c *testContext) uint16 {
c.t.Fatalf("Bad payload: got %x, want %x", udp.Payload(), payload)
}
- return port
+ return udp.SourcePort()
+}
+
+func testDualWrite(c *testContext) uint16 {
+ v4Port := testV4Write(c)
+ v6Port := testV6Write(c)
+ if v4Port != v6Port {
+ c.t.Fatalf("expected v4 and v6 ports to be equal: got v4Port = %d, v6Port = %d", v4Port, v6Port)
+ }
+
+ return v4Port
}
func TestDualWriteUnbound(t *testing.T) {
@@ -498,7 +508,16 @@ func TestDualWriteConnectedToV6(t *testing.T) {
c.t.Fatalf("Bind failed: %v", err)
}
- testDualWrite(c)
+ testV6Write(c)
+
+ // Write to V4 mapped address.
+ payload := buffer.View(newPayload())
+ _, err := c.ep.Write(tcpip.SlicePayload(payload), tcpip.WriteOptions{
+ To: &tcpip.FullAddress{Addr: testV4MappedAddr, Port: testPort},
+ })
+ if err != tcpip.ErrNetworkUnreachable {
+ c.t.Fatalf("Write returned unexpected error: got %v, want %v", err, tcpip.ErrNetworkUnreachable)
+ }
}
func TestDualWriteConnectedToV4Mapped(t *testing.T) {
@@ -512,7 +531,16 @@ func TestDualWriteConnectedToV4Mapped(t *testing.T) {
c.t.Fatalf("Bind failed: %v", err)
}
- testDualWrite(c)
+ testV4Write(c)
+
+ // Write to v6 address.
+ payload := buffer.View(newPayload())
+ _, err := c.ep.Write(tcpip.SlicePayload(payload), tcpip.WriteOptions{
+ To: &tcpip.FullAddress{Addr: testV6Addr, Port: testPort},
+ })
+ if err != tcpip.ErrInvalidEndpointState {
+ c.t.Fatalf("Write returned unexpected error: got %v, want %v", err, tcpip.ErrInvalidEndpointState)
+ }
}
func TestV4WriteOnV6Only(t *testing.T) {
@@ -547,8 +575,8 @@ func TestV6WriteOnBoundToV4Mapped(t *testing.T) {
_, err := c.ep.Write(tcpip.SlicePayload(payload), tcpip.WriteOptions{
To: &tcpip.FullAddress{Addr: testV6Addr, Port: testPort},
})
- if err != tcpip.ErrNoRoute {
- c.t.Fatalf("Write returned unexpected error: got %v, want %v", err, tcpip.ErrNoRoute)
+ if err != tcpip.ErrInvalidEndpointState {
+ c.t.Fatalf("Write returned unexpected error: got %v, want %v", err, tcpip.ErrInvalidEndpointState)
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 15:23:40 +0000