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From: Mohammad Hedayati <hedayati.mo@gmail.com>
Date: Tue, 21 Dec 2010 12:43:30 +0330
Message-ID: <AANLkTinwpf8eMoqR-MUncd3GVktJPpsfvbvmg01zEaSO@mail.gmail.com>
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Subject: soaccept
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I'm about to use a char device for a kind of distributed processing,
so I've coded the open function as follows. The problem is that
soaccept returns 0 without populating the raddr. I've checked netstat,
everything seems to be fine, the socket is created, bound and the
state is LISTENING. Even the remote is connection is ESTABLISHED. But,
it cannot receive anything.
int
open(struct cdev *dev, int flag, int otyp, struct thread *td)
{
	uprintf("in open...\n");
	
	int error = -1;	
	socktd = td;
	
	error = socreate(AF_INET, &sock, SOCK_STREAM, IPPROTO_TCP,
td->td_proc->p_ucred, socktd);
	if(error != 0)
		return error;
	
	sockaddr.sin_len = sizeof(struct sockaddr_in);
	sockaddr.sin_family = AF_INET;
	sockaddr.sin_port = htons(1234);
	sockaddr.sin_addr.s_addr = INADDR_ANY;
	error = sobind(sock, (struct sockaddr *)&sockaddr, socktd);
	uprintf("sobind error = %d\n", error);
	
	error = solisten(sock, 5, socktd);
	uprintf("solisten error = %d\n", error);
	
	error = soaccept(sock, (struct sockaddr **)&raddr);
	uprintf("soaccept error = %d, ip=%s\n", error, inet_ntoa(raddr->sin_addr));
	
	uprintf("out open...\n");
	
	return(error);
}

int
read(struct cdev *dev, struct uio *uio, int ioflag)
{	
	int error = 0;
	
	error = soreceive(sock, (struct sockaddr **)&raddr, uio, NULL, NULL, NULL);
	
	return(error);
}