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direct transmission of files via TCP/IP

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# 1  
Old 08-24-2002
direct transmission of files via TCP/IP
Hi,
is it possible to write files via write() to a socket and read it on the other side via read(), without going through buffers? Iif not via write() and read() are there other possibilities?

thanks
darkspace
# 2  
Old 08-26-2002
I'm not sure that I understand the question. But you can read() and write() to a socket, however a properly constructed read() or write() call must include the address of a buffer for the data.
# 3  
Old 08-26-2002
Quote:
Originally posted by Perderabo
I'm not sure that I understand the question. But you can read() and write() to a socket, however a properly constructed read() or write() call must include the address of a buffer for the data.
Is it possible to use a buffer size of only 1 element? I bet he wants to eliminate any lag related to send/receive with unfilled buffers. I ran into a similiar situation years ago with a bar code reader. I don't remember how I solved the problem (and it was under Win32 anyway).
# 4  
Old 08-26-2002
You can read and write a single byte if you really want to. But sending a byte at a time over a TCP/IP connection is crazy unless you only have a single byte to send. Note that the original question was about sending "files". I think that he wants to send the file straight from disk to the network without the data ever coming into core.
# 5  
Old 08-26-2002
Quote:
Originally posted by Perderabo
You can read and write a single byte if you really want to. But sending a byte at a time over a TCP/IP connection is crazy unless you only have a single byte to send. Note that the original question was about sending "files". I think that he wants to send the file straight from disk to the network without the data ever coming into core.
Yeah. Your probably right. I didn't think of it that way.
# 6  
Old 08-26-2002
Exactly, i do not want to store the file into a buffer (for read or write), but write/read it directly from disk to the socket/ from socket to disk.
I got one solution by mapping the file, then i can use the mapped file as the buffer for the read()/write() function.

thanks
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