1 files changed, 255 insertions, 0 deletions

diff --git a/lib/libstand/dev_net.c b/lib/libstand/dev_net.c
new file mode 100644
index 000000000000..8d09e4f7c084
--- /dev/null
+++ b/lib/libstand/dev_net.c
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+/*	$NetBSD: dev_net.c,v 1.12 1997/12/10 20:38:37 gwr Exp $	*/
+
+/*-
+ * Copyright (c) 1997 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Gordon W. Ross.
+ *
+ * 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 NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+/*
+ * This module implements a "raw device" interface suitable for
+ * use by the stand-alone I/O library NFS code.  This interface
+ * does not support any "block" access, and exists only for the
+ * purpose of initializing the network interface, getting boot
+ * parameters, and performing the NFS mount.
+ *
+ * At open time, this does:
+ *
+ * find interface      - netif_open()
+ * RARP for IP address - rarp_getipaddress()
+ * RPC/bootparams      - callrpc(d, RPC_BOOTPARAMS, ...)
+ * RPC/mountd          - nfs_mount(sock, ip, path)
+ *
+ * the root file handle from mountd is saved in a global
+ * for use by the NFS open code (NFS/lookup).
+ */
+
+#include <machine/stdarg.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+
+#include "stand.h"
+#include "net.h"
+#include "netif.h"
+#include "nfs.h"
+#include "bootparam.h"
+#include "dev_net.h"
+
+static int netdev_sock = -1;
+static int netdev_opens;
+
+static int net_getparams(int sock);
+
+struct devsw netdev = {
+    "net", 
+    DEVT_NET, 
+    net_init,
+    net_strategy, 
+    net_open, 
+    net_close, 
+    noioctl
+};
+
+/*
+ * Called by devopen after it sets f->f_dev to our devsw entry.
+ * This opens the low-level device and sets f->f_devdata.
+ * This is declared with variable arguments...
+ */
+int
+net_open(struct open_file *f, void *vdev)
+{
+	char *devname;		/* Device part of file name (or NULL). */
+	int error = 0;
+
+	devname = vdev;
+
+#ifdef	NETIF_DEBUG
+	if (debug)
+		printf("net_open: %s\n", devname);
+#endif
+
+	/* On first open, do netif open, mount, etc. */
+	if (netdev_opens == 0) {
+		/* Find network interface. */
+		if (netdev_sock < 0) {
+			netdev_sock = netif_open(devname);
+			if (netdev_sock < 0) {
+				printf("net_open: netif_open() failed\n");
+				return (ENXIO);
+			}
+			if (debug)
+				printf("net_open: netif_open() succeeded\n");
+		}
+		if (rootip.s_addr == 0) {
+			/* Get root IP address, and path, etc. */
+			error = net_getparams(netdev_sock);
+			if (error) {
+				/* getparams makes its own noise */
+				netif_close(netdev_sock);
+				netdev_sock = -1;
+				return (error);
+			}
+		}
+	}
+	netdev_opens++;
+	return (error);
+}
+
+int
+net_close(f)
+	struct open_file *f;
+{
+
+#ifdef	NETIF_DEBUG
+	if (debug)
+		printf("net_close: opens=%d\n", netdev_opens);
+#endif
+
+	/* On last close, do netif close, etc. */
+	f->f_devdata = NULL;
+	/* Extra close call? */
+	if (netdev_opens <= 0)
+		return (0);
+	netdev_opens--;
+	/* Not last close? */
+	if (netdev_opens > 0)
+		return(0);
+	rootip.s_addr = 0;
+	if (netdev_sock >= 0) {
+		if (debug)
+			printf("net_close: calling netif_close()\n");
+		netif_close(netdev_sock);
+		netdev_sock = -1;
+	}
+	return (0);
+}
+
+int
+net_ioctl()
+{
+	return EIO;
+}
+
+int
+net_strategy()
+{
+	return EIO;
+}
+
+
+/*
+ * Get info for NFS boot: our IP address, our hostname,
+ * server IP address, and our root path on the server.
+ * There are two ways to do this:  The old, Sun way,
+ * and the more modern, BOOTP way. (RFC951, RFC1048)
+ *
+ * The default is to use the Sun bootparams RPC
+ * (because that is what the kernel will do).
+ * MD code can make try_bootp initialied data,
+ * which will override this common definition.
+ */
+#ifdef	SUPPORT_BOOTP
+int try_bootp;
+int bootp(int sock);
+#endif
+
+static int
+net_getparams(sock)
+	int sock;
+{
+	char buf[MAXHOSTNAMELEN];
+	n_long smask;
+
+#ifdef	SUPPORT_BOOTP
+	/*
+	 * Try to get boot info using BOOTP.  If we succeed, then
+	 * the server IP address, gateway, and root path will all
+	 * be initialized.  If any remain uninitialized, we will
+	 * use RARP and RPC/bootparam (the Sun way) to get them.
+	 */
+	if (try_bootp)
+		bootp(sock);
+	if (myip.s_addr != 0)
+		return (0);
+	if (debug)
+		printf("net_open: BOOTP failed, trying RARP/RPC...\n");
+#endif
+
+	/*
+	 * Use RARP to get our IP address.  This also sets our
+	 * netmask to the "natural" default for our address.
+	 */
+	if (rarp_getipaddress(sock)) {
+		printf("net_open: RARP failed\n");
+		return (EIO);
+	}
+	printf("net_open: client addr: %s\n", inet_ntoa(myip));
+
+	/* Get our hostname, server IP address, gateway. */
+	if (bp_whoami(sock)) {
+		printf("net_open: bootparam/whoami RPC failed\n");
+		return (EIO);
+	}
+	printf("net_open: client name: %s\n", hostname);
+
+	/*
+	 * Ignore the gateway from whoami (unreliable).
+	 * Use the "gateway" parameter instead.
+	 */
+	smask = 0;
+	gateip.s_addr = 0;
+	if (bp_getfile(sock, "gateway", &gateip, buf) == 0) {
+		/* Got it!  Parse the netmask. */
+		smask = ip_convertaddr(buf);
+	}
+	if (smask) {
+		netmask = smask;
+		printf("net_open: subnet mask: %s\n", intoa(netmask));
+	}
+	if (gateip.s_addr)
+		printf("net_open: net gateway: %s\n", inet_ntoa(gateip));
+
+	/* Get the root server and pathname. */
+	if (bp_getfile(sock, "root", &rootip, rootpath)) {
+		printf("net_open: bootparam/getfile RPC failed\n");
+		return (EIO);
+	}
+
+	printf("net_open: server addr: %s\n", inet_ntoa(rootip));
+	printf("net_open: server path: %s\n", rootpath);
+
+	return (0);
+}