Initial Store & Forward Implementation (#2917)

This adds store & forward relays into dendrite for p2p.
A few things have changed:
- new relay api serves new http endpoints for s&f federation
- updated outbound federation queueing which will attempt to forward
using s&f if appropriate
- database entries to track s&f relays for other nodes

federationapi/internal/federationclient_test.go

@@ -0,0 +1,202 @@
+// Copyright 2022 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package internal
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"github.com/matrix-org/dendrite/federationapi/queue"
+	"github.com/matrix-org/dendrite/federationapi/statistics"
+	"github.com/matrix-org/dendrite/setup/config"
+	"github.com/matrix-org/dendrite/setup/process"
+	"github.com/matrix-org/dendrite/test"
+	"github.com/matrix-org/gomatrixserverlib"
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	FailuresUntilAssumedOffline = 3
+	FailuresUntilBlacklist      = 8
+)
+
+func (t *testFedClient) QueryKeys(ctx context.Context, origin, s gomatrixserverlib.ServerName, keys map[string][]string) (gomatrixserverlib.RespQueryKeys, error) {
+	t.queryKeysCalled = true
+	if t.shouldFail {
+		return gomatrixserverlib.RespQueryKeys{}, fmt.Errorf("Failure")
+	}
+	return gomatrixserverlib.RespQueryKeys{}, nil
+}
+
+func (t *testFedClient) ClaimKeys(ctx context.Context, origin, s gomatrixserverlib.ServerName, oneTimeKeys map[string]map[string]string) (gomatrixserverlib.RespClaimKeys, error) {
+	t.claimKeysCalled = true
+	if t.shouldFail {
+		return gomatrixserverlib.RespClaimKeys{}, fmt.Errorf("Failure")
+	}
+	return gomatrixserverlib.RespClaimKeys{}, nil
+}
+
+func TestFederationClientQueryKeys(t *testing.T) {
+	testDB := test.NewInMemoryFederationDatabase()
+
+	cfg := config.FederationAPI{
+		Matrix: &config.Global{
+			SigningIdentity: gomatrixserverlib.SigningIdentity{
+				ServerName: "server",
+			},
+		},
+	}
+	fedClient := &testFedClient{}
+	stats := statistics.NewStatistics(testDB, FailuresUntilBlacklist, FailuresUntilAssumedOffline)
+	queues := queue.NewOutgoingQueues(
+		testDB, process.NewProcessContext(),
+		false,
+		cfg.Matrix.ServerName, fedClient, nil, &stats,
+		nil,
+	)
+	fedapi := FederationInternalAPI{
+		db:         testDB,
+		cfg:        &cfg,
+		statistics: &stats,
+		federation: fedClient,
+		queues:     queues,
+	}
+	_, err := fedapi.QueryKeys(context.Background(), "origin", "server", nil)
+	assert.Nil(t, err)
+	assert.True(t, fedClient.queryKeysCalled)
+}
+
+func TestFederationClientQueryKeysBlacklisted(t *testing.T) {
+	testDB := test.NewInMemoryFederationDatabase()
+	testDB.AddServerToBlacklist("server")
+
+	cfg := config.FederationAPI{
+		Matrix: &config.Global{
+			SigningIdentity: gomatrixserverlib.SigningIdentity{
+				ServerName: "server",
+			},
+		},
+	}
+	fedClient := &testFedClient{}
+	stats := statistics.NewStatistics(testDB, FailuresUntilBlacklist, FailuresUntilAssumedOffline)
+	queues := queue.NewOutgoingQueues(
+		testDB, process.NewProcessContext(),
+		false,
+		cfg.Matrix.ServerName, fedClient, nil, &stats,
+		nil,
+	)
+	fedapi := FederationInternalAPI{
+		db:         testDB,
+		cfg:        &cfg,
+		statistics: &stats,
+		federation: fedClient,
+		queues:     queues,
+	}
+	_, err := fedapi.QueryKeys(context.Background(), "origin", "server", nil)
+	assert.NotNil(t, err)
+	assert.False(t, fedClient.queryKeysCalled)
+}
+
+func TestFederationClientQueryKeysFailure(t *testing.T) {
+	testDB := test.NewInMemoryFederationDatabase()
+
+	cfg := config.FederationAPI{
+		Matrix: &config.Global{
+			SigningIdentity: gomatrixserverlib.SigningIdentity{
+				ServerName: "server",
+			},
+		},
+	}
+	fedClient := &testFedClient{shouldFail: true}
+	stats := statistics.NewStatistics(testDB, FailuresUntilBlacklist, FailuresUntilAssumedOffline)
+	queues := queue.NewOutgoingQueues(
+		testDB, process.NewProcessContext(),
+		false,
+		cfg.Matrix.ServerName, fedClient, nil, &stats,
+		nil,
+	)
+	fedapi := FederationInternalAPI{
+		db:         testDB,
+		cfg:        &cfg,
+		statistics: &stats,
+		federation: fedClient,
+		queues:     queues,
+	}
+	_, err := fedapi.QueryKeys(context.Background(), "origin", "server", nil)
+	assert.NotNil(t, err)
+	assert.True(t, fedClient.queryKeysCalled)
+}
+
+func TestFederationClientClaimKeys(t *testing.T) {
+	testDB := test.NewInMemoryFederationDatabase()
+
+	cfg := config.FederationAPI{
+		Matrix: &config.Global{
+			SigningIdentity: gomatrixserverlib.SigningIdentity{
+				ServerName: "server",
+			},
+		},
+	}
+	fedClient := &testFedClient{}
+	stats := statistics.NewStatistics(testDB, FailuresUntilBlacklist, FailuresUntilAssumedOffline)
+	queues := queue.NewOutgoingQueues(
+		testDB, process.NewProcessContext(),
+		false,
+		cfg.Matrix.ServerName, fedClient, nil, &stats,
+		nil,
+	)
+	fedapi := FederationInternalAPI{
+		db:         testDB,
+		cfg:        &cfg,
+		statistics: &stats,
+		federation: fedClient,
+		queues:     queues,
+	}
+	_, err := fedapi.ClaimKeys(context.Background(), "origin", "server", nil)
+	assert.Nil(t, err)
+	assert.True(t, fedClient.claimKeysCalled)
+}
+
+func TestFederationClientClaimKeysBlacklisted(t *testing.T) {
+	testDB := test.NewInMemoryFederationDatabase()
+	testDB.AddServerToBlacklist("server")
+
+	cfg := config.FederationAPI{
+		Matrix: &config.Global{
+			SigningIdentity: gomatrixserverlib.SigningIdentity{
+				ServerName: "server",
+			},
+		},
+	}
+	fedClient := &testFedClient{}
+	stats := statistics.NewStatistics(testDB, FailuresUntilBlacklist, FailuresUntilAssumedOffline)
+	queues := queue.NewOutgoingQueues(
+		testDB, process.NewProcessContext(),
+		false,
+		cfg.Matrix.ServerName, fedClient, nil, &stats,
+		nil,
+	)
+	fedapi := FederationInternalAPI{
+		db:         testDB,
+		cfg:        &cfg,
+		statistics: &stats,
+		federation: fedClient,
+		queues:     queues,
+	}
+	_, err := fedapi.ClaimKeys(context.Background(), "origin", "server", nil)
+	assert.NotNil(t, err)
+	assert.False(t, fedClient.claimKeysCalled)
+}