public virtual NfsPacket ReadDirectory(NfsPacket packet)
{
FileHandle fh = new FileHandle(packet);
uint cookie = packet.GetUInt();
uint count = packet.GetUInt();
uint xId = packet.XID;
// if this is a new call to readdir (cookie=0) or it is a new directory to read, replace the cache.
string dirName = GetNameFromHandle(fh.Handle, xId);
//Console.Write("Reading dir " + dirName + " cookie=" + cookie + " count=" + count + "\n");
if (cookie == 0 || (dirName.Equals(_cachedDirectories) == false))
{
if (!Directory.Exists(dirName))
{
throw new NFSException(xId, (uint)NfsReply.ERR_NOENT);
}
List <String> dirFiles = Directory.GetFiles(dirName).Select(f => new FileInfo(f).Name).ToList();
dirFiles.AddRange(Directory.GetDirectories(dirName).Select(d => new DirectoryInfo(d).Name));
if (dirFiles == null)
{
throw new NFSException(xId, (uint)NfsReply.ERR_NOENT);
}
//Console.WriteLine("dir has " + dirFiles.Count + " entries");
if (dirFiles.Count <= 0)
{
throw new NFSException(xId, (uint)NfsReply.ERR_NOENT);
}
dirFiles.BubbleSort();
//dirFiles.Insert(0, "..");
//dirFiles.Insert(0, ".");
_cachedFiles = dirFiles;
_cachedDirectories = dirName;
}
// prepare the reply packet.
NfsPacket reply = new NfsPacket((int)count);
reply.AddReplyHeader(xId);
reply.SetUInt((uint)NfsReply.OK);
// Add files to the list until there are no more files or all of the count bytes have been used.
int current = reply.Length;
bool more = false; // are there more files to get
// if there are any files to add
if (_cachedFiles != null && _cachedFiles.Count > 0)
{
for (int i = (int)cookie; i < _cachedFiles.Count; i++)
{
// see if there is enough room for another file - 3 longs of id,
// the name (rounded up to 4 bytes) and a trailing long
// indicating whether there are more files to get
int needed = 3 * 4 + (_cachedFiles[i].Length + 3) + 8;
if (needed + current >= count)
{
more = true;
break;
}
// get the handle for this file
string fileName = Path.Combine(_cachedDirectories, _cachedFiles[i]);
uint handle = HandleManager.Current.GetHandle(fileName);
Console.WriteLine("Read handle for: " + fileName + " -> " + handle);
// add an entry to the packet for this file
reply.SetUInt(NfsHandler.NFS_TRUE);
reply.SetUInt(handle);
reply.Set(_cachedFiles[i]);
reply.SetUInt((uint)i + 1); // this is the cookie
current = reply.Length;
}
}
reply.SetUInt(NfsHandler.NFS_FALSE); // no more entries in this packet
// tell the client if this packet has returned the last of the files
if (more)
{
reply.SetUInt(NfsHandler.NFS_FALSE);
}
else
{
reply.SetUInt(NfsHandler.NFS_TRUE);
}
return(reply);
}
public virtual NfsPacket ReadDirectory(NfsPacket packet)
{
FileHandle fh = new FileHandle(packet);
uint cookie = packet.GetUInt();
uint count = packet.GetUInt();
uint xId = packet.XID;
// if this is a new call to readdir (cookie=0) or it is a new directory to read, replace the cache.
string dirName = GetNameFromHandle(fh.Handle, xId);
//Console.Write("Reading dir " + dirName + " cookie=" + cookie + " count=" + count + "\n");
if (cookie == 0 || (dirName.Equals(_cachedDirectories) == false)) {
if (!Directory.Exists(dirName)) {
throw new NFSException(xId, (uint)NfsReply.ERR_NOENT);
}
List<String> dirFiles = Directory.GetFiles(dirName).Select(f => new FileInfo(f).Name).ToList();
dirFiles.AddRange(Directory.GetDirectories(dirName).Select(d => new DirectoryInfo(d).Name));
if (dirFiles == null) {
throw new NFSException(xId, (uint)NfsReply.ERR_NOENT);
}
//Console.WriteLine("dir has " + dirFiles.Count + " entries");
if (dirFiles.Count <= 0) {
throw new NFSException(xId, (uint)NfsReply.ERR_NOENT);
}
dirFiles.BubbleSort();
//dirFiles.Insert(0, "..");
//dirFiles.Insert(0, ".");
_cachedFiles = dirFiles;
_cachedDirectories = dirName;
}
// prepare the reply packet.
NfsPacket reply = new NfsPacket((int)count);
reply.AddReplyHeader(xId);
reply.SetUInt((uint)NfsReply.OK);
// Add files to the list until there are no more files or all of the count bytes have been used.
int current = reply.Length;
bool more = false; // are there more files to get
// if there are any files to add
if (_cachedFiles != null && _cachedFiles.Count > 0) {
for (int i = (int)cookie; i < _cachedFiles.Count; i++) {
// see if there is enough room for another file - 3 longs of id,
// the name (rounded up to 4 bytes) and a trailing long
// indicating whether there are more files to get
int needed = 3 * 4 + (_cachedFiles[i].Length + 3) + 8;
if (needed + current >= count) {
more = true;
break;
}
// get the handle for this file
string fileName = Path.Combine(_cachedDirectories, _cachedFiles[i]);
uint handle = HandleManager.Current.GetHandle(fileName);
Console.WriteLine("Read handle for: " + fileName + " -> " + handle);
// add an entry to the packet for this file
reply.SetUInt(NfsHandler.NFS_TRUE);
reply.SetUInt(handle);
reply.Set(_cachedFiles[i]);
reply.SetUInt((uint)i + 1); // this is the cookie
current = reply.Length;
}
}
reply.SetUInt(NfsHandler.NFS_FALSE); // no more entries in this packet
// tell the client if this packet has returned the last of the files
if (more) {
reply.SetUInt(NfsHandler.NFS_FALSE);
}
else {
reply.SetUInt(NfsHandler.NFS_TRUE);
}
return reply;
}
