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package moe.yuuta.dn42peering.manage;
import io.vertx.core.AsyncResult;
import io.vertx.core.Future;
import io.vertx.core.impl.logging.Logger;
import io.vertx.core.impl.logging.LoggerFactory;
import moe.yuuta.dn42peering.jaba.Pair;
import moe.yuuta.dn42peering.node.INodeService;
import moe.yuuta.dn42peering.node.Node;
import moe.yuuta.dn42peering.peer.IPeerService;
import moe.yuuta.dn42peering.peer.Peer;
import moe.yuuta.dn42peering.peer.ProvisionStatus;
import moe.yuuta.dn42peering.provision.BGPRequestCommon;
import moe.yuuta.dn42peering.provision.IProvisionRemoteService;
import moe.yuuta.dn42peering.provision.WGRequestCommon;
import javax.annotation.Nonnull;
import java.io.IOException;
class ManagementProvision {
private static final Logger logger = LoggerFactory.getLogger(ManagementProvision.class.getSimpleName());
@Nonnull
public static Future<Void> reloadPeer(@Nonnull INodeService nodeService,
@Nonnull IProvisionRemoteService provisionService,
@Nonnull Peer existingPeer, @Nonnull Peer inPeer) {
// Check if we can reload on the fly.
// Otherwise, we can only deprovision and provision.
// This will cause unnecessary wastes.
boolean canReload = inPeer.getType() == existingPeer.getType() &&
inPeer.getNode() == existingPeer.getNode();
// wg-quick does not support switching local IP addresses.
// However, switch between link local addresses and real IPv6 addresses require the change of
// local v6 address. Therefore, in such cases, we have to do a full re-provision.
if(canReload && // Only check if no other factors prevent us from reloading.
inPeer.getType() == Peer.VPNType.WIREGUARD &&
existingPeer.getType() == Peer.VPNType.WIREGUARD) {
try {
final boolean existingLL = existingPeer.isIPv6LinkLocal();
final boolean newLL = inPeer.isIPv6LinkLocal();
if(existingLL != newLL) {
canReload = false;
}
} catch (IOException e) {
return Future.failedFuture(e);
}
}
// wg-quick will also not clear EndPoint setting if we just reload it.
if(canReload && // Only check if no other factors prevent us from reloading.
inPeer.getType() == Peer.VPNType.WIREGUARD &&
existingPeer.getType() == Peer.VPNType.WIREGUARD) {
if(inPeer.getWgEndpoint() == null &&
existingPeer.getWgEndpoint() != null) {
canReload = false;
}
}
Future<Void> future;
if (canReload) {
future = Future.<Node>future(f -> nodeService.getNode(inPeer.getNode(), f))
.compose(node -> {
if(node == null || !node.getSupportedVPNTypes().contains(inPeer.getType())) {
return Future.failedFuture("The node does not exist");
}
return Future.succeededFuture(node);
})
.compose(node -> {
switch (existingPeer.getType()) {
case WIREGUARD:
final WGRequestCommon wgReq = inPeer.toWGRequest();
wgReq.setNode(node.toRPCNode());
return Future.<String>future(f -> provisionService.reloadWG(
node.toRPCNode(),
wgReq,
f)
).compose(device -> Future.succeededFuture(new Pair<>(node, device)));
default:
throw new UnsupportedOperationException("Bug: Unknown type.");
}
})
.compose(pair -> {
final BGPRequestCommon bgpReq = inPeer.toBGPRequest();
bgpReq.setNode(pair.a.toRPCNode());
bgpReq.setDevice(pair.b);
return Future.future(f -> provisionService.reloadBGP(
pair.a.toRPCNode(),
bgpReq,
f));
});
} else {
future = unprovisionPeer(nodeService, provisionService, existingPeer)
.compose(f -> provisionPeer(nodeService, provisionService, inPeer));
}
return future;
}
public static Future<Void> unprovisionPeer(@Nonnull INodeService nodeService,
@Nonnull IProvisionRemoteService provisionService,
@Nonnull Peer existingPeer) {
return Future.<Node>future(f -> nodeService.getNode(existingPeer.getNode(), f))
.compose(node -> {
if(node == null) {
return Future.failedFuture("The node does not exist");
}
return Future.succeededFuture(node);
})
.compose(node -> {
switch (existingPeer.getType()) {
case WIREGUARD:
return Future.<Void>future(f -> provisionService.deleteWG(
node.toRPCNode(),
new WGRequestCommon(null,
(long)existingPeer.getId(),
null,
null,
null,
null,
null,
null,
null),
f))
.compose(res -> Future.succeededFuture(node));
default:
throw new UnsupportedOperationException("Bug: Unknown type.");
}
})
.compose(node -> {
return Future.future(f -> provisionService.deleteBGP(
node.toRPCNode(),
new BGPRequestCommon(null,
(long)existingPeer.getId(),
null,
null,
null,
null,
null),
f));
})
;
}
@Nonnull
public static Future<Void> provisionPeer(@Nonnull INodeService nodeService,
@Nonnull IProvisionRemoteService provisionService,
@Nonnull Peer inPeer) {
return Future.<Node>future(f -> nodeService.getNode(inPeer.getNode(), f))
.compose(node -> {
if(node == null || !node.getSupportedVPNTypes().contains(inPeer.getType())) {
return Future.failedFuture("The node does not exist");
}
return Future.succeededFuture(node);
})
.compose(node -> {
switch (inPeer.getType()) {
case WIREGUARD:
final WGRequestCommon wgReq = inPeer.toWGRequest();
wgReq.setNode(node.toRPCNode());
return Future.<String>future(f -> provisionService.provisionWG(
node.toRPCNode(),
wgReq,
f)
).compose(device -> Future.succeededFuture(new Pair<>(node, device)));
default:
throw new UnsupportedOperationException("Bug: Unknown type.");
}
})
.compose(pair -> {
final BGPRequestCommon bgpReq = inPeer.toBGPRequest();
bgpReq.setNode(pair.a.toRPCNode());
bgpReq.setDevice(pair.b);
return Future.future(f -> provisionService.provisionBGP(
pair.a.toRPCNode(),
bgpReq,
f));
});
}
public static void handleProvisionResult(@Nonnull IPeerService peerService,
@Nonnull Peer inPeer,
@Nonnull AsyncResult<Void> res) {
if(res.succeeded()) {
peerService.changeProvisionStatus(inPeer.getId(),
ProvisionStatus.PROVISIONED, ar -> {
if (ar.failed()) {
logger.error(String.format("Cannot update %d to provisioned.", inPeer.getId()), ar.cause());
}
});
} else {
logger.error(String.format("Cannot provision %d.", inPeer.getId()), res.cause());
peerService.changeProvisionStatus(inPeer.getId(),
ProvisionStatus.FAIL, ar -> {
if (ar.failed()) {
logger.error(String.format("Cannot update %d to failed.", inPeer.getId()), ar.cause());
}
});
}
}
}
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