BSD 4.4 Lite Kernel Sources

1 files changed, 197 insertions, 0 deletions

diff --git a/sys/kern/sys_socket.c b/sys/kern/sys_socket.c
new file mode 100644
index 0000000..a93ae86
--- /dev/null
+++ b/sys/kern/sys_socket.c
@@ -0,0 +1,197 @@
+/*
+ * Copyright (c) 1982, 1986, 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)sys_socket.c	8.1 (Berkeley) 6/10/93
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/file.h>
+#include <sys/mbuf.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+
+#include <net/if.h>
+#include <net/route.h>
+
+struct	fileops socketops =
+    { soo_read, soo_write, soo_ioctl, soo_select, soo_close };
+
+/* ARGSUSED */
+soo_read(fp, uio, cred)
+	struct file *fp;
+	struct uio *uio;
+	struct ucred *cred;
+{
+
+	return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0,
+		uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0));
+}
+
+/* ARGSUSED */
+soo_write(fp, uio, cred)
+	struct file *fp;
+	struct uio *uio;
+	struct ucred *cred;
+{
+
+	return (sosend((struct socket *)fp->f_data, (struct mbuf *)0,
+		uio, (struct mbuf *)0, (struct mbuf *)0, 0));
+}
+
+soo_ioctl(fp, cmd, data, p)
+	struct file *fp;
+	int cmd;
+	register caddr_t data;
+	struct proc *p;
+{
+	register struct socket *so = (struct socket *)fp->f_data;
+
+	switch (cmd) {
+
+	case FIONBIO:
+		if (*(int *)data)
+			so->so_state |= SS_NBIO;
+		else
+			so->so_state &= ~SS_NBIO;
+		return (0);
+
+	case FIOASYNC:
+		if (*(int *)data) {
+			so->so_state |= SS_ASYNC;
+			so->so_rcv.sb_flags |= SB_ASYNC;
+			so->so_snd.sb_flags |= SB_ASYNC;
+		} else {
+			so->so_state &= ~SS_ASYNC;
+			so->so_rcv.sb_flags &= ~SB_ASYNC;
+			so->so_snd.sb_flags &= ~SB_ASYNC;
+		}
+		return (0);
+
+	case FIONREAD:
+		*(int *)data = so->so_rcv.sb_cc;
+		return (0);
+
+	case SIOCSPGRP:
+		so->so_pgid = *(int *)data;
+		return (0);
+
+	case SIOCGPGRP:
+		*(int *)data = so->so_pgid;
+		return (0);
+
+	case SIOCATMARK:
+		*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
+		return (0);
+	}
+	/*
+	 * Interface/routing/protocol specific ioctls:
+	 * interface and routing ioctls should have a
+	 * different entry since a socket's unnecessary
+	 */
+	if (IOCGROUP(cmd) == 'i')
+		return (ifioctl(so, cmd, data, p));
+	if (IOCGROUP(cmd) == 'r')
+		return (rtioctl(cmd, data, p));
+	return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 
+	    (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0));
+}
+
+soo_select(fp, which, p)
+	struct file *fp;
+	int which;
+	struct proc *p;
+{
+	register struct socket *so = (struct socket *)fp->f_data;
+	register int s = splnet();
+
+	switch (which) {
+
+	case FREAD:
+		if (soreadable(so)) {
+			splx(s);
+			return (1);
+		}
+		selrecord(p, &so->so_rcv.sb_sel);
+		so->so_rcv.sb_flags |= SB_SEL;
+		break;
+
+	case FWRITE:
+		if (sowriteable(so)) {
+			splx(s);
+			return (1);
+		}
+		selrecord(p, &so->so_snd.sb_sel);
+		so->so_snd.sb_flags |= SB_SEL;
+		break;
+
+	case 0:
+		if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) {
+			splx(s);
+			return (1);
+		}
+		selrecord(p, &so->so_rcv.sb_sel);
+		so->so_rcv.sb_flags |= SB_SEL;
+		break;
+	}
+	splx(s);
+	return (0);
+}
+
+soo_stat(so, ub)
+	register struct socket *so;
+	register struct stat *ub;
+{
+
+	bzero((caddr_t)ub, sizeof (*ub));
+	ub->st_mode = S_IFSOCK;
+	return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE,
+	    (struct mbuf *)ub, (struct mbuf *)0, 
+	    (struct mbuf *)0));
+}
+
+/* ARGSUSED */
+soo_close(fp, p)
+	struct file *fp;
+	struct proc *p;
+{
+	int error = 0;
+
+	if (fp->f_data)
+		error = soclose((struct socket *)fp->f_data);
+	fp->f_data = 0;
+	return (error);
+}