cloudflared-mirror/edgediscovery/edgediscovery_test.go

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package edgediscovery
import (
"net"
"testing"
"github.com/rs/zerolog"
"github.com/stretchr/testify/assert"
"github.com/cloudflare/cloudflared/edgediscovery/allregions"
)
var (
testLogger = zerolog.Nop()
v4Addrs = []*allregions.EdgeAddr{&addr0, &addr1, &addr2, &addr3}
v6Addrs = []*allregions.EdgeAddr{&addr4, &addr5, &addr6, &addr7}
addr0 = allregions.EdgeAddr{
TCP: &net.TCPAddr{
IP: net.ParseIP("123.4.5.0"),
Port: 8000,
Zone: "",
},
UDP: &net.UDPAddr{
IP: net.ParseIP("123.4.5.0"),
Port: 8000,
Zone: "",
},
IPVersion: allregions.V4,
}
addr1 = allregions.EdgeAddr{
TCP: &net.TCPAddr{
IP: net.ParseIP("123.4.5.1"),
Port: 8000,
Zone: "",
},
UDP: &net.UDPAddr{
IP: net.ParseIP("123.4.5.1"),
Port: 8000,
Zone: "",
},
IPVersion: allregions.V4,
}
addr2 = allregions.EdgeAddr{
TCP: &net.TCPAddr{
IP: net.ParseIP("123.4.5.2"),
Port: 8000,
Zone: "",
},
UDP: &net.UDPAddr{
IP: net.ParseIP("123.4.5.2"),
Port: 8000,
Zone: "",
},
IPVersion: allregions.V4,
}
addr3 = allregions.EdgeAddr{
TCP: &net.TCPAddr{
IP: net.ParseIP("123.4.5.3"),
Port: 8000,
Zone: "",
},
UDP: &net.UDPAddr{
IP: net.ParseIP("123.4.5.3"),
Port: 8000,
Zone: "",
},
IPVersion: allregions.V4,
}
addr4 = allregions.EdgeAddr{
TCP: &net.TCPAddr{
IP: net.ParseIP("2606:4700:a0::1"),
Port: 8000,
Zone: "",
},
UDP: &net.UDPAddr{
IP: net.ParseIP("2606:4700:a0::1"),
Port: 8000,
Zone: "",
},
IPVersion: allregions.V6,
}
addr5 = allregions.EdgeAddr{
TCP: &net.TCPAddr{
IP: net.ParseIP("2606:4700:a0::2"),
Port: 8000,
Zone: "",
},
UDP: &net.UDPAddr{
IP: net.ParseIP("2606:4700:a0::2"),
Port: 8000,
Zone: "",
},
IPVersion: allregions.V6,
}
addr6 = allregions.EdgeAddr{
TCP: &net.TCPAddr{
IP: net.ParseIP("2606:4700:a0::3"),
Port: 8000,
Zone: "",
},
UDP: &net.UDPAddr{
IP: net.ParseIP("2606:4700:a0::3"),
Port: 8000,
Zone: "",
},
IPVersion: allregions.V6,
}
addr7 = allregions.EdgeAddr{
TCP: &net.TCPAddr{
IP: net.ParseIP("2606:4700:a0::4"),
Port: 8000,
Zone: "",
},
UDP: &net.UDPAddr{
IP: net.ParseIP("2606:4700:a0::4"),
Port: 8000,
Zone: "",
},
IPVersion: allregions.V6,
}
)
func TestGiveBack(t *testing.T) {
edge := MockEdge(&testLogger, []*allregions.EdgeAddr{&addr0, &addr1, &addr2, &addr3})
// Give this connection an address
assert.Equal(t, 4, edge.AvailableAddrs())
const connID = 0
addr, err := edge.GetAddr(connID)
assert.NoError(t, err)
assert.NotNil(t, addr)
assert.Equal(t, 3, edge.AvailableAddrs())
// Get it back
edge.GiveBack(addr, false)
assert.Equal(t, 4, edge.AvailableAddrs())
}
func TestRPCAndProxyShareSingleEdgeIP(t *testing.T) {
// Make an edge with a single IP
edge := MockEdge(&testLogger, []*allregions.EdgeAddr{&addr0})
tunnelConnID := 0
// Use the IP for a tunnel
addrTunnel, err := edge.GetAddr(tunnelConnID)
assert.NoError(t, err)
// Ensure the IP can be used for RPC too
addrRPC, err := edge.GetAddrForRPC()
assert.NoError(t, err)
assert.Equal(t, addrTunnel, addrRPC)
}
func TestGetAddrForRPC(t *testing.T) {
edge := MockEdge(&testLogger, []*allregions.EdgeAddr{&addr0, &addr1, &addr2, &addr3})
// Get a connection
assert.Equal(t, 4, edge.AvailableAddrs())
addr, err := edge.GetAddrForRPC()
assert.NoError(t, err)
assert.NotNil(t, addr)
// Using an address for RPC shouldn't consume it
assert.Equal(t, 4, edge.AvailableAddrs())
// Get it back
edge.GiveBack(addr, false)
assert.Equal(t, 4, edge.AvailableAddrs())
}
func TestOnePerRegion(t *testing.T) {
// Make an edge with only one address
edge := MockEdge(&testLogger, []*allregions.EdgeAddr{&addr0, &addr1})
// Use the only address
const connID = 0
a1, err := edge.GetAddr(connID)
assert.NoError(t, err)
assert.NotNil(t, a1)
// if the first address is bad, get the second one
a2, err := edge.GetDifferentAddr(connID, false)
assert.NoError(t, err)
assert.NotNil(t, a2)
assert.NotEqual(t, a1, a2)
// now that second one is bad, get the first one again
a3, err := edge.GetDifferentAddr(connID, false)
assert.NoError(t, err)
assert.Equal(t, a1, a3)
}
func TestOnlyOneAddrLeft(t *testing.T) {
// Make an edge with only one address
edge := MockEdge(&testLogger, []*allregions.EdgeAddr{&addr0})
// Use the only address
const connID = 0
addr, err := edge.GetAddr(connID)
assert.NoError(t, err)
assert.NotNil(t, addr)
// If that edge address is "bad", there's no alternative address.
_, err = edge.GetDifferentAddr(connID, false)
assert.Error(t, err)
// previously bad address should become available again on next iteration.
addr, err = edge.GetDifferentAddr(connID, false)
assert.NoError(t, err)
assert.NotNil(t, addr)
}
func TestNoAddrsLeft(t *testing.T) {
// Make an edge with no addresses
edge := MockEdge(&testLogger, []*allregions.EdgeAddr{})
_, err := edge.GetAddr(2)
assert.Error(t, err)
_, err = edge.GetAddrForRPC()
assert.Error(t, err)
}
func TestGetAddr(t *testing.T) {
edge := MockEdge(&testLogger, []*allregions.EdgeAddr{&addr0, &addr1, &addr2, &addr3})
// Give this connection an address
const connID = 0
addr, err := edge.GetAddr(connID)
assert.NoError(t, err)
assert.NotNil(t, addr)
// If the same connection requests another address, it should get the same one.
addr2, err := edge.GetAddr(connID)
assert.NoError(t, err)
assert.Equal(t, addr, addr2)
}
func TestGetDifferentAddr(t *testing.T) {
edge := MockEdge(&testLogger, []*allregions.EdgeAddr{&addr0, &addr1, &addr2, &addr3})
// Give this connection an address
assert.Equal(t, 4, edge.AvailableAddrs())
const connID = 0
addr, err := edge.GetAddr(connID)
assert.NoError(t, err)
assert.NotNil(t, addr)
assert.Equal(t, 3, edge.AvailableAddrs())
// If the same connection requests another address, it should get the same one.
addr2, err := edge.GetDifferentAddr(connID, false)
assert.NoError(t, err)
assert.NotEqual(t, addr, addr2)
assert.Equal(t, 3, edge.AvailableAddrs())
}
// MockEdge creates a Cloudflare Edge from arbitrary TCP addresses. Used for testing.
func MockEdge(log *zerolog.Logger, addrs []*allregions.EdgeAddr) *Edge {
regions := allregions.NewNoResolve(addrs)
return &Edge{
log: log,
regions: regions,
}
}