override public bool pkt_proc(byte[] buf)
{
if (buf == null)
{
pktbuf = new pkt_rrq(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);
write_file(filename);
pktbuf = new pkt_ack(blkno++).pack();
}
else
{
if (blkno == 0) // data blkno start with 1
{
write_file(filename);
blkno++;
}
pkt_data pkt = new pkt_data();
if (!pkt.parse(buf))
{
return(false);
}
if (pkt.blkno != (blkno & 0xffff))
{
return(true); // ignore expired data?
}
filesize += pkt.data.Length;
if (pkt.data.Length > 0)
{
while (q.produce(pkt.data) == 0)
{
; // infinit produce this data
}
}
pktbuf = new pkt_ack(blkno++).pack();
if (pkt.data.Length < idic["blksize"]) // stop
{
maxblkno = --blkno;
q.stop();
uc.Send(pktbuf, pktbuf.Length, r);
return(false);
}
}
curretry = 0; // reset retry cnt
return(uc.Send(pktbuf, pktbuf.Length, r) == pktbuf.Length);
}
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);
}