On 08/01/2008, Tom Spink <[EMAIL PROTECTED]> wrote: > On 08/01/2008, Brent Casavant <[EMAIL PROTECTED]> wrote: > > On Tue, 8 Jan 2008, Tom Spink wrote: > > > > > Where in the code is the message length being sent across the socket? > > > > In do_producer(), there are the following lines in the main loop: > > > > /* Send random lengths of data */ > > messages[i].length = (rand() % MAXLEN) + sizeof(size_t); > > iov[i].iov_len = messages[i].length; > > > > The entire "struct sockmsg" is sent across the socket, so the first > > size_t in each message contains the length of the entire message > > (including the size_t). This size gets picked up at the > > recv(...,MSG_PEEK) line in do_consumer(). > > > > Thanks, > > Brent > > > > -- > > Brent Casavant All music is folk music. I ain't > > [EMAIL PROTECTED] never heard a horse sing a song. > > Silicon Graphics, Inc. -- Louis Armstrong > > > > Hi, > > But you're not consuming the size_t on the other end. You're only > peeking it, i.e. you're doing the recv to peek at the message, but > never calling recv to remove that data from the queue... or am I > missing something? > > -- > Regards, > Tom Spink > University of Edinburgh >
Ach. I *am* missing something... and what I'm missing is my understanding of the sendmsg and recvmsg calls. A quick Google has sorted me out. -- Regards, Tom Spink University of Edinburgh -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
