override public bool pkt_proc(byte[] buf)
{
byte[] data;
if (buf == null)
{
pktbuf = new pkt_wrq(remoteFile, tftpmode.ToString(), idic["timeout"] * idic["maxretry"] / 1000, idic["blksize"]).pack();
}
else if (blkno == 0 && (Opcodes)buf[1] == Opcodes.OAck) // oack
{
pkt_oack pkt = new pkt_oack();
if (!pkt.parse(buf))
{
return(false);
}
update_param(pkt.timeout * 1000 / Math.Max(idic["maxretry"], 1), pkt.blksize);
read_file(filename);
data = q.consume(); //while ((data = q.consume()) == null) ; // may be infinite wait for a new msg here?
pktbuf = new pkt_data(++blkno, data).pack();
}
else
{
if (blkno == 0)
{
read_file(filename);
}
pkt_ack pkt = new pkt_ack();
if (!pkt.parse(buf))
{
return(false);
}
if (pkt.blkno != (blkno & 0xffff))
{
return(true); // ignore expired ack?
}
if (blkno == maxblkno && blkno > 0) // over
{
return(false);
}
if ((data = q.consume()) == null)
{
data = new byte[0]; // srv send last empty block; client write last block
}
pktbuf = new pkt_data(++blkno, data).pack();
}
curretry = 0; // reset retry cnt
return(uc.Send(pktbuf, pktbuf.Length, r) == pktbuf.Length);
}
override public bool pkt_proc(byte[] buf)
{
byte[] data;
if (blkno == 0)
{
Opcodes op = (Opcodes)buf[1];
if (op == Opcodes.Read)
{
pkt_rrq pkt = new pkt_rrq();
if (!pkt.parse(buf))
{
return(false);
}
update_param(pkt.timeout * 1000 / Math.Max(idic["maxretry"], 1), pkt.blksize);
if (!File.Exists(sdic["cwd"] + pkt.filename))
{
pktbuf = new pkt_err(Errcodes.FileNotFound, pkt.filename).pack();
uc.Send(pktbuf, pktbuf.Length, r);
filename = pkt.filename; // set filename for log
return(false);
}
read_file(pkt.filename);
if (pkt.has_opt())
{
pkt.op = Opcodes.OAck;
pktbuf = pkt.pack(); // wait for ack blkno=0
}
else
{
data = q.consume(); //while ((data = q.consume()) == null) ; // may be infinite wait for a new msg here?
pktbuf = new pkt_data(++blkno, data).pack();
}
}
else // ack
{
pkt_ack pkt = new pkt_ack();
if (!pkt.parse(buf))
{
return(false);
}
if (pkt.blkno != (blkno & 0xffff))
{
return(true); // ignore expired ack?
}
data = q.consume(); //while ((data = q.consume()) == null) ; // may be infinite wait for a new msg here?
pktbuf = new pkt_data(++blkno, data).pack();
}
}
else
{
pkt_ack pkt = new pkt_ack();
if (!pkt.parse(buf))
{
return(false);
}
if (pkt.blkno != (blkno & 0xffff))
{
return(true); // ignore expired ack?
}
if (blkno == maxblkno && blkno > 0) // over
{
return(false);
}
if ((data = q.consume()) == null)
{
data = new byte[0]; // srv send last empty block; client write last block
}
pktbuf = new pkt_data(++blkno, data).pack();
}
curretry = 0; // reset retry cnt
return(uc.Send(pktbuf, pktbuf.Length, r) == pktbuf.Length);
}