site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Hi, Thanks in advance Bijoy Thomas. On May 9, 2005, at 2:49 PM, Justin Walker wrote: On May 9, 2005, at 11:38, Bijoy Thomas wrote: Regards, Justin -- Justin C. Walker, Curmudgeon-at-Large /~\ The ASCII \ / Ribbon Campaign X Help Cure HTML Email / \ This email sent to bijoyjth@bluebottle.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... Thanks for all your suggestions. I made the wrong asusmption that return values were negative .. so i was doing if(soconnect(args) < 0){ printf("bad socket"); } when actually soconect was returning EINVAL (bad arg) because i forgot to fill the sin_len field of my sockaddr_in argument. Hence, the ensuing soreceive was returning ENOTCONN (not connected). Now thats fixed and my soconnect returns 0. The problem now is that my userland program seems to be sleeping because after hitting ctrl-C, the return value from soreceive is EINTR. Hence, i guess my program is blocked by soreceive. I have a couple of questions If we are using a tcp socket, do we need to provide the second arg for soreceive or is that only for udp sockets. Am i correct in my assumtion that as long as i care only about the data, i just need to provide the struct uio arg for sorecieve with its iovec filed initialzed to my kernel space buffer and its length and setting uio_segflg = UIO_SYSSPACE and uio_rw = UIO_READ. In this case the mbufs can be NULL in the call to soreceive. Also, why do we use the uio_resid field in the struct iuo? Is it used in multiple calls. Can we just set it to the buffer length on the first call? I was using the flag MSG_WAITALL for the soreceive. Will that cause the soreceive to stall until all data arrives? Is there a default flag for just returning whatever data has arrived. I know I am jumping ahead of myself without understanding the workings of soreceive. I have alredy placed an order for the design of the bsd os book. But until then, I would be grateful if anyone could answer these. [snip] and passing this so soreceive with both the mbufs as NULL. ( I'm guessing the mbufs are provided only if you want the detailed packet header and accompanying data returned possibly as a list of mbufs). I tried it this way but i'm getting a non zero return from soreceive. Any suggestions/links? My first suggestion is to actually look at, and understand, the non-zero return value you get from soreceive(). If you don't understand the value, it might help to let us know what it is. _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/ bijoyjth%40bluebottle.com This email sent to site_archiver@lists.apple.com