private void confirmfail(WvDbusMsg response)
{
WVPASS(response.type = Wv.Dbus.MType.Error);
WVPASS(response.signature = "s");
var i = response.iter();
WVPASSEQ(i.pop(), failmsg);
}
public WvDbusMsg reply(string signature)
{
WvDbusMsg reply = new WvDbusMsg();
reply.type = Dbus.MType.MethodReturn;
reply.flags = Dbus.MFlag.NoReplyExpected | Dbus.MFlag.NoAutoStart;
reply.rserial = this.serial;
reply.dest = this.sender;
reply.signature = signature;
return reply;
}
internal static void SendChunkRecordSignal(WvDbus conn,
WvDbusMsg call, string sender,
VxColumnInfo[] colinfo,
object[][] data, byte[][] nulls)
{
WvDbusWriter writer =
VxDbusRouter.PrepareRecordsetWriter(colinfo, data, nulls);
writer.Write(call.serial);
new WvDbusSignal(call.sender, call.path, "vx.db", "ChunkRecordsetSig",
"a(issnny)vaayu")
.write(writer)
.send(conn);
}
static void CallGetSchemaChecksums(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
if (call.signature.ne()) {
reply = CreateUnknownMethodReply(call, "GetSchemaChecksums");
return;
}
string clientid = GetClientId(call);
if (clientid == null)
{
reply = call.err_reply("org.freedesktop.DBus.Error.Failed",
"Could not identify the client");
return;
}
// FIXME: Add vx.db.toomuchdata error
WvDbusWriter writer = new WvDbusWriter();
//FIXME: No exception catching?
using (var dbi = VxSqlPool.create(clientid))
{
VxDbSchema backend = new VxDbSchema(dbi);
VxSchemaChecksums sums = backend.GetChecksums();
sums.WriteChecksums(writer);
}
reply = call.reply(VxSchemaChecksums.GetDbusSignature()).write(writer);
}
static void CallExecChunkRecordset(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
// XXX: Stuff in this comment block shamelessly stolen from
// "CallExecRecordset".
if (call.signature != "s") {
reply = CreateUnknownMethodReply(call, "ExecChunkRecordset");
return;
}
if (call.Body == null) {
reply = call.err_reply
("org.freedesktop.DBus.Error.InvalidSignature",
"Signature provided but no body received");
return;
}
/// XXX
VxDb.ExecChunkRecordset(conn, call, out reply);
}
public static void CallExecRecordset(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
if (call.signature != "s") {
reply = CreateUnknownMethodReply(call, "ExecRecordset");
return;
}
if (call.Body == null) {
reply = call.err_reply
("org.freedesktop.DBus.Error.InvalidSignature",
"Signature provided but no body received");
return;
}
string clientid = GetClientId(call);
if (clientid == null)
{
reply = call.err_reply("org.freedesktop.DBus.Error.Failed",
"Could not identify the client");
return;
}
var it = call.iter();
string query = it.pop();
VxColumnInfo[] colinfo;
object[][] data;
byte[][] nullity;
VxDb.ExecRecordset(clientid, (string)query,
out colinfo, out data, out nullity);
// FIXME: Add vx.db.toomuchdata error
WvDbusWriter writer = PrepareRecordsetWriter(colinfo, data, nullity);
reply = call.reply("a(issnny)vaay").write(writer);
}
static void CallExecScalar(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
if (call.signature != "s") {
reply = CreateUnknownMethodReply(call, "ExecScalar");
return;
}
if (call.Body == null) {
reply = call.err_reply
("org.freedesktop.DBus.Error.InvalidSignature",
"Signature provided but no body received");
return;
}
string clientid = GetClientId(call);
if (clientid == null)
{
reply = call.err_reply("org.freedesktop.DBus.Error.Failed",
"Could not identify the client");
return;
}
var it = call.iter();
string query = it.pop();
object result;
VxColumnType coltype;
VxDb.ExecScalar(clientid, (string)query,
out coltype, out result);
WvDbusWriter writer = new WvDbusWriter();
writer.WriteSig(VxColumnTypeToSignature(coltype));
WriteV(writer, coltype, result);
reply = call.reply("v").write(writer);
}
static void CallQuit(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
// FIXME: Check permissions here
WvDbusWriter writer = new WvDbusWriter();
writer.Write("Quit");
reply = call.reply("s").write(writer);
Versaplexd.want_to_die = true;
}
static void CallGetSchemaData(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
if (call.signature != "ss") {
reply = CreateUnknownMethodReply(call, "GetSchemaData");
return;
}
string clientid = GetClientId(call);
if (clientid == null)
{
reply = call.err_reply("org.freedesktop.DBus.Error.Failed",
"Could not identify the client");
return;
}
var it = call.iter();
string tablename = it.pop();
string where = it.pop();
WvDbusWriter writer = new WvDbusWriter();
// FIXME: No exception catching?
// FIXME: Should receive the replace/skip parameters via dbus
using (var dbi = VxSqlPool.create(clientid))
{
VxDbSchema backend = new VxDbSchema(dbi);
string schemadata = backend.GetSchemaData(tablename, 0, where,
null, null);
writer.Write(schemadata);
}
reply = call.reply("s").write(writer);
}
private static void HandleCancelQuery(WvDbus conn, WvDbusMsg msg)
{
log.print(WvLog.L.Debug4, "Received CancelQuery request\n");
//FIXME: Should I be in yet another thread?
Action perform = null;
if (msg.signature != "u" && msg.signature != "s")
{
//accept 's' signatures for Perl DBus, which is stupid and can't
//send me 'u' parameters, even though the api accepts them.
log.print(WvLog.L.Debug4, "CancelQuery: bad signature {0}\n",
msg.signature);
perform = () => {
conn.send(msg.err_reply(
"org.freedesktop.DBus.Error.UnknownMethod",
"No overload of {0} has signature '{1}'",
"CancelQuery", msg.signature));
};
}
else
{
var it = msg.iter();
uint tokill;
if (msg.signature == "s")
{
log.print(WvLog.L.Debug4,
"CancelQuery: converting arg from string\n");
string temps = it.pop();
tokill = Convert.ToUInt32(temps);
}
else
tokill = it.pop();
log.print(WvLog.L.Debug4,
"CancelQuery: try killing msg id {0}\n", tokill);
lock (action_mutex)
{
if (curaction != null && curaction.conn == conn &&
curaction.src.serial == tokill)
{
log.print(WvLog.L.Debug4,
"CancelQuery: killing current action!\n");
WvSqlRows_IDataReader.Cancel();
curaction = null;
}
else
{
log.print(WvLog.L.Debug4,
"CancelQuery: traversing action queue...\n");
//Traverse the action queue, killing stuff
foreach (VxActionTriple t in action_queue)
if (t.conn == conn && t.src.serial == tokill)
{
log.print(WvLog.L.Debug4,
"CancelQuery: found culprit, killing.\n");
//action_queue.Remove(t);
//FIXME: What message should we really put here?
t.action = () => {
conn.send(t.src.err_reply("vx.db.sqlerror",
"This message got canceled"));
};
break;
}
}
}
//Pointless return to make Perl happy.
perform = () => {
WvDbusWriter writer = new WvDbusWriter();
writer.Write("Cancel");
conn.send(msg.reply("s").write(writer));
};
log.print(WvLog.L.Debug4, "CancelQuery: complete\n");
}
//FIXME: It's not clear whether for just add operations, in conjuction
//with RemoveAt(0) going on in the otherthread, we need a mutex.
action_queue.Add(new VxActionTriple(conn, msg, perform));
}
public static string GetClientId(WvDbusMsg call)
{
string sender = call.sender;
// For now, the client ID is just the username of the Unix UID that
// DBus has associated with the connection.
string username;
var conn = Versaplexd.conn;
if (!usernames.TryGetValue(sender, out username))
{
try
{
// FIXME: This will likely change as we find a more
// universal way to do SSL authentication via D-Bus.
username = VxSqlPool.GetUsernameForCert(
conn.GetCertFingerprint(sender));
}
catch
{
try
{
// FIXME: This system call isn't actually standard
username = conn.GetUnixUserName(sender);
}
catch
{
try
{
// FIXME: This system call is standard, but not useful
// on Windows.
username = conn.GetUnixUser(sender).ToString();
}
catch
{
username = "******"; // use default connection, if any
}
}
}
// Remember the result, so we don't have to ask DBus all the time
usernames[sender] = username;
log.print(WvLog.L.Info,
"New connection '{0}' is user '{1}'\n",
sender, username);
}
return username;
}
void ExecuteCall(MethodCallProcessor processor,
WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
try {
processor(conn, call, out reply);
} catch (VxRequestException e) {
reply = call.err_reply(e.DBusErrorType, e.Message);
log.print("SQL result: {0}\n", e.Short());
} catch (Exception e) {
reply = call.err_reply("vx.db.exception",
"An internal error occurred.");
log.print("{0}\n", e.ToString());
}
}
public bool route(WvDbus conn, WvDbusMsg msg, out WvDbusMsg reply)
{
MethodCallProcessor p;
if (msg.ifc != "vx.db" || msg.path != "/db")
{
reply = null;
return false;
}
if (msg.method == "Test")
p = CallTest;
else if (msg.method == "Quit")
p = CallQuit;
else if (msg.method == "ExecScalar")
p = CallExecScalar;
else if (msg.method == "ExecRecordset")
p = CallExecRecordset;
else if (msg.method == "ExecChunkRecordset")
p = CallExecChunkRecordset;
else if (msg.method == "GetSchemaChecksums")
p = CallGetSchemaChecksums;
else if (msg.method == "GetSchema")
p = CallGetSchema;
else if (msg.method == "PutSchema")
p = CallPutSchema;
else if (msg.method == "DropSchema")
p = CallDropSchema;
else if (msg.method == "GetSchemaData")
p = CallGetSchemaData;
else if (msg.method == "PutSchemaData")
p = CallPutSchemaData;
else
{
// FIXME: this should be done at a higher level somewhere
reply = msg.err_reply(
"org.freedesktop.DBus.Error.UnknownMethod",
"Method name {0} not found on interface {1}",
msg.method, msg.ifc);
return true;
}
ExecuteCall(p, conn, msg, out reply);
return true;
}
internal static void ExecChunkRecordset(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
string connid = VxDbusRouter.GetClientId(call);
if (connid == null)
{
reply = call.err_reply(
"org.freedesktop.DBus.Error.Failed",
"Could not identify the client");
return;
}
var it = call.iter();
string query = query_parser(it.pop(),
VxSqlPool.access_restrictions(connid));
log.print(WvLog.L.Debug3, "ExecChunkRecordset {0}\n", query);
//Times we tried going through this loop to completion
int numtries = 0;
while (true)
{
try
{
List<object[]> rows = new List<object[]>();
List<byte[]> rownulls = new List<byte[]>();
VxColumnInfo[] colinfo;
// Our size here is just an approximation.
int cursize = 0;
// FIXME: Sadly, this is stupidly similar to ExecRecordset.
// Anything we can do here to identify commonalities?
using (var dbi = VxSqlPool.create(connid))
using (WvSqlRows resultset = dbi.select(query))
{
var columns = resultset.columns.ToArray();
colinfo = ProcessSchema(columns);
int ncols = columns.Count();
foreach (WvSqlRow cur_row in resultset)
{
object[] row = new object[ncols];
byte[] rownull = new byte[ncols];
cursize += rownull.Length;
for (int i = 0; i < ncols; i++)
{
WvAutoCast cval = cur_row[i];
bool isnull = cval.IsNull;
row[i] = null;
rownull[i] = isnull ? (byte)1 : (byte)0;
switch (colinfo[i].VxColumnType)
{
case VxColumnType.Int64:
row[i] = !isnull ?
(Int64)cval : new Int64();
cursize += sizeof(Int64);
break;
case VxColumnType.Int32:
row[i] = !isnull ?
(Int32)cval : new Int32();
cursize += sizeof(Int32);
break;
case VxColumnType.Int16:
row[i] = !isnull ?
(Int16)cval : new Int16();
cursize += sizeof(Int16);
break;
case VxColumnType.UInt8:
row[i] = !isnull ?
(Byte)cval : new Byte();
cursize += sizeof(Byte);
break;
case VxColumnType.Bool:
row[i] = !isnull ?
(bool)cval : new Boolean();
cursize += sizeof(Boolean);
break;
case VxColumnType.Double:
// Might return a Single or Double
// FIXME: Check if getting a single causes
// this to croak
row[i] = !isnull ?
(double)cval : (double)0.0;
cursize += sizeof(double);
break;
case VxColumnType.Uuid:
//FIXME: Do I work?
row[i] = !isnull ?
(string)cval : "";
cursize += !isnull ?
((string)cval).Length * sizeof(Char):0;
break;
case VxColumnType.Binary:
{
if (isnull)
{
row[i] = new byte[0];
break;
}
row[i] = (byte[])cval;
cursize += ((byte[])cval).Length;
break;
}
case VxColumnType.String:
row[i] = !isnull ? (string)cval : "";
cursize += !isnull ?
((string)cval).Length * sizeof(Char):0;
break;
case VxColumnType.DateTime:
row[i] = !isnull ?
new VxDbusDateTime((DateTime)cval) :
new VxDbusDateTime();
cursize += System.Runtime.InteropServices.Marshal.SizeOf((VxDbusDateTime)row[i]);
break;
case VxColumnType.Decimal:
row[i] = !isnull ?
((Decimal)cval).ToString() : "";
cursize += ((string)(row[i])).Length *
sizeof(Char);
break;
}
} // column iterator
rows.Add(row);
rownulls.Add(rownull);
if (cursize >= 1024*1024) //approx 1 MB
{
log.print(WvLog.L.Debug4,
"(1 MB reached; {0} rows)\n",
rows.Count);
SendChunkRecordSignal(conn, call, call.sender,
colinfo, rows.ToArray(),
rownulls.ToArray());
rows = new List<object[]>();
rownulls = new List<byte[]>();
cursize = 0;
}
} // row iterator
} // using
// OK, we're down to either one more packet or no more data
// Package that up in the 'reply' to this message, saving some
// data being sent.
if (cursize > 0)
log.print(WvLog.L.Debug4, "(Remaining data; {0} rows)\n",
rows.Count);
// Create reply, either with or with no data
WvDbusWriter replywriter =
VxDbusRouter.PrepareRecordsetWriter(colinfo,
rows.ToArray(),
rownulls.ToArray());
reply = call.reply("a(issnny)vaay").write(replywriter);
break;
} catch (DbException e) {
throw new VxSqlException(e.Message, e);
} catch (VxConfigException e)
{
if (e.Message.StartsWith("Connect: A network-related or instance-specific error")
&& ++numtries <= 1) //only one retry
{
log.print(WvLog.L.Debug4,
"Can't connect to DB, fishy..., attempting to reconnect... (attempt #{0})\n",
numtries);
}
else
throw e; //rethrow
}
} //while
}
static void CallPutSchemaData(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
if (call.signature != "ss") {
reply = CreateUnknownMethodReply(call, "PutSchemaData");
return;
}
string clientid = GetClientId(call);
if (clientid == null)
{
reply = call.err_reply("org.freedesktop.DBus.Error.Failed",
"Could not identify the client");
return;
}
var it = call.iter();
string tablename = it.pop();
string text = it.pop();
using (var dbi = VxSqlPool.create(clientid))
{
VxDbSchema backend = new VxDbSchema(dbi);
backend.PutSchemaData(tablename, text, 0);
}
reply = call.reply();
}
static bool WvDbusMsgReady(WvDbus conn, WvDbusMsg msg)
{
// FIXME: This should really queue things to be run from the thread
// pool and then the response would be sent back through the action
// queue
log.print(WvLog.L.Debug4, "WvDbusMsgReady\n");
switch (msg.type)
{
case Wv.Dbus.MType.MethodCall:
if (msg.ifc == "vx.db")
{
if (msg.path == "/db" && msg.method == "CancelQuery")
HandleCancelQuery(conn, msg);
else //not 'CancelQuery'
{
//FIXME: It's not clear whether for just add operations,
//in conjuction with RemoveAt(0) going on in the other
//thread, we need a mutex.
action_queue.Add(new VxActionTriple(conn, msg,
() => {
WvDbusMsg reply;
if (msgrouter.route(conn, msg, out reply))
{
if (reply == null) {
// FIXME: Do something if this happens, maybe?
log.print("Empty reply from RouteWvDbusMsg\n");
} else {
// XXX: Should this be done further down rather
// than passing the reply out here?
conn.send(reply);
}
}
}));
}
return true;
}
return false;
default:
log.print(WvLog.L.Warning,
"Unexpected DBus message received: #{0} {1}->{2} {3}:{4}.{5}\n",
msg.serial, msg.sender, msg.dest,
msg.path, msg.ifc, msg.method);
return false;
}
}
private void confirmpass(WvDbusMsg response)
{
WVPASS(response.type == Wv.Dbus.MType.MethodReturn);
}
public VxActionTriple(WvDbus _conn, WvDbusMsg _src, Action _action)
{
this.conn = _conn;
this.src = _src;
this.action = _action;
}
static void CallDropSchema(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
if (call.signature != "as") {
reply = CreateUnknownMethodReply(call, "DropSchema");
return;
}
string clientid = GetClientId(call);
if (clientid == null)
{
reply = call.err_reply("org.freedesktop.DBus.Error.Failed",
"Could not identify the client");
return;
}
var it = call.iter();
string[] keys = it.pop().Cast<string>().ToArray();
VxSchemaErrors errs;
using (var dbi = VxSqlPool.create(clientid))
{
VxDbSchema backend = new VxDbSchema(dbi);
errs = backend.DropSchema(keys);
}
WvDbusWriter writer = new WvDbusWriter();
VxSchemaErrors.WriteErrors(writer, errs);
reply = call.reply(VxSchemaErrors.GetDbusSignature()).write(writer);
if (errs != null && errs.Count > 0)
{
reply.type = Wv.Dbus.MType.Error;
reply.err = "org.freedesktop.DBus.Error.Failed";
}
}
static WvDbusMsg CreateUnknownMethodReply(WvDbusMsg call,
string methodname)
{
return call.err_reply("org.freedesktop.DBus.Error.UnknownMethod",
"No overload of {0} has signature '{1}'",
methodname, call.signature);
}
static void CallPutSchema(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
if (call.signature != String.Format("{0}i",
VxSchema.GetDbusSignature())) {
reply = CreateUnknownMethodReply(call, "PutSchema");
return;
}
string clientid = GetClientId(call);
if (clientid == null)
{
reply = call.err_reply("org.freedesktop.DBus.Error.Failed",
"Could not identify the client");
return;
}
var it = call.iter();
VxSchema schema = new VxSchema(it.pop());
int opts = it.pop();
VxSchemaErrors errs;
using (var dbi = VxSqlPool.create(clientid))
{
VxDbSchema backend = new VxDbSchema(dbi);
errs = backend.Put(schema, null, (VxPutOpts)opts);
}
WvDbusWriter writer = new WvDbusWriter();
VxSchemaErrors.WriteErrors(writer, errs);
reply = call.reply(VxSchemaErrors.GetDbusSignature()).write(writer);
if (errs != null && errs.Count > 0)
{
reply.type = Wv.Dbus.MType.Error;
reply.err = "org.freedesktop.DBus.Error.Failed";
}
}
static void CallTest(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
if (call.signature.ne()) {
reply = CreateUnknownMethodReply(call, "Test");
return;
}
string clientid = GetClientId(call);
if (clientid == null)
{
reply = call.err_reply("org.freedesktop.DBus.Error.Failed",
"Could not identify the client");
return;
}
VxColumnInfo[] colinfo;
object[][] data;
byte[][] nullity;
VxDb.ExecRecordset(clientid, "select 'Works! :D'",
out colinfo, out data, out nullity);
// FIXME: Add vx.db.toomuchdata error
WvDbusWriter writer = PrepareRecordsetWriter(colinfo, data, nullity);
reply = call.reply("a(issnny)vaay").write(writer);
}
static void CallGetSchema(WvDbus conn,
WvDbusMsg call, out WvDbusMsg reply)
{
if (call.signature != "as") {
reply = CreateUnknownMethodReply(call, "GetSchema");
return;
}
string clientid = GetClientId(call);
if (clientid == null)
{
reply = call.err_reply("org.freedesktop.DBus.Error.Failed",
"Could not identify the client");
return;
}
var it = call.iter();
string[] names = it.pop().Cast<string>().ToArray();
WvDbusWriter writer = new WvDbusWriter();
using (var dbi = VxSqlPool.create(clientid))
{
VxDbSchema backend = new VxDbSchema(dbi);
VxSchema schema = backend.Get(names);
schema.WriteSchema(writer);
}
reply = call.reply(VxSchema.GetDbusSignature()).write(writer);
}
