On 4/3/12, Peter Stuge <pe...@stuge.se> wrote: > Adam Craig wrote: >> > This sounds like the expected behaviour of libssh2's pipelined SFTP >> > architecture. The return value doesn't have to correspond to the >> > amount uploaded on _that_ call as long as the overall total is >> > correct. The last call that doesn't appear to do anything allows >> > libssh2 to do some housekeeping. >> >> What do you mean by the "overall total?" > > Number of bytes transfered once libssh2 returns 0 to indicate > completion. > Do you mean the number of bytes transferred in that function call, with that file handle, with that session handle, or something else?
> >> If I upload a file of 200K all in one call to libssh2_sftp_write and >> it returns 30K when it actually uploaded all 200K, what does the 30K >> return value mean? > > It means that libssh2 has sent some data but not all, and you need to > call libssh2 again. That is what I thought it meant, but, even if I do not call _write again, all 200K bytes show up in the file on the server. > > >> > I'm not sure why yours are limited to 2K but I believe this is >> > negotiated with the server (jump in here guys if I'm wrong) so >> > it's possible your server is refusing to send bigger packets. > > I don't think this is negotiable. > > >> That was my first guess, and it may be the case. After looking at >> the documentation for the server-side SFTP tool and not finding any >> information about a maximum packet size, I decided to look into >> whether it was an issue with Libssh2. >> >> Documentation I read for the SFTP server utility to which the app >> is connecting: >> http://www.openbsd.org/cgi-bin/man.cgi?query=sftp-server&sektion=8 > > In any case, OpenSSH sftp-server has pretty much zero tunables. > > Is the server OpenBSD, or OpenSSH portable on some other unix? > The server is Red Hat. Would you recommend trying a different SFTP server utility? Adam > > //Peter > _______________________________________________ > libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel > _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel
