Annotation of sys/arch/alpha/stand/netboot/dev_net.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: dev_net.c,v 1.3 2002/03/14 03:15:51 millert Exp $ */
2: /* $NetBSD: dev_net.c,v 1.4 1997/04/06 08:41:24 cgd Exp $ */
3:
4: /*
5: * Copyright (c) 1995 Gordon W. Ross
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. The name of the author may not be used to endorse or promote products
17: * derived from this software without specific prior written permission.
18: * 4. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by Gordon W. Ross
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32: */
33:
34: /*
35: * This module implements a "raw device" interface suitable for
36: * use by the stand-alone I/O library NFS code. This interface
37: * does not support any "block" access, and exists only for the
38: * purpose of initializing the network interface, getting boot
39: * parameters, and performing the NFS mount.
40: *
41: * At open time, this does:
42: *
43: * find interface - netif_open()
44: * RARP for IP address - rarp_getipaddress()
45: * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
46: * RPC/mountd - nfs_mount(sock, ip, path)
47: *
48: * the root file handle from mountd is saved in a global
49: * for use by the NFS open code (NFS/lookup).
50: */
51:
52: #include <stdarg.h>
53: #include <sys/param.h>
54: #include <sys/socket.h>
55: #include <net/if.h>
56: #include <netinet/in.h>
57: #include <netinet/if_ether.h>
58: #include <netinet/in_systm.h>
59:
60: #include <lib/libsa/stand.h>
61: #include <lib/libsa/net.h>
62: #include <lib/libsa/netif.h>
63: #include <lib/libsa/bootparam.h>
64: #include "dev_net.h"
65:
66: extern int debug;
67: extern int nfs_root_node[]; /* XXX - get from nfs_mount() */
68:
69: /*
70: * Various globals needed by the network code:
71: */
72:
73: #if 0
74: /* for arp.c, rarp.c */
75: u_char bcea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
76: #endif
77:
78: struct in_addr myip; /* my ip address */
79: struct in_addr rootip; /* root ip address */
80: struct in_addr gateip; /* swap ip address */
81: n_long netmask; /* subnet or net mask */
82:
83: char rootpath[FNAME_SIZE];
84:
85: int hostnamelen;
86: char hostname[FNAME_SIZE];
87:
88: int domainnamelen;
89: char domainname[FNAME_SIZE];
90:
91: /*
92: * Local things...
93: */
94: static int netdev_sock = -1;
95: static int netdev_opens;
96:
97: /*
98: * Called by devopen after it sets f->f_dev to our devsw entry.
99: * This opens the low-level device and sets f->f_devdata.
100: * This is declared with variable arguments...
101: */
102: int
103: net_open(struct open_file *f, ...)
104: {
105: va_list ap;
106: char *devname; /* Device part of file name (or NULL). */
107: int error = 0;
108:
109: va_start(ap, f);
110: devname = va_arg(ap, char *);
111: va_end(ap);
112:
113: #ifdef NETIF_DEBUG
114: if (debug)
115: printf("net_open: %s\n", devname);
116: #endif
117:
118: /* On first open, do netif open, mount, etc. */
119: if (netdev_opens == 0) {
120: /* Find network interface. */
121: if (netdev_sock < 0) {
122: netdev_sock = netif_open(devname);
123: if (netdev_sock < 0) {
124: printf("net_open: netif_open() failed\n");
125: return (ENXIO);
126: }
127: if (debug)
128: printf("net_open: netif_open() succeeded\n");
129: }
130: if (rootip.s_addr == 0) {
131: /* Get root IP address, and path, etc. */
132: error = net_getparams(netdev_sock);
133: if (error) {
134: /* getparams makes its own noise */
135: goto fail;
136: }
137: /* Get the NFS file handle (mountd). */
138: error = nfs_mount(netdev_sock, rootip, rootpath);
139: if (error) {
140: printf("net_open: NFS mount error=%d\n", error);
141: rootip.s_addr = 0;
142: fail:
143: netif_close(netdev_sock);
144: netdev_sock = -1;
145: return (error);
146: }
147: if (debug)
148: printf("net_open: NFS mount succeeded\n");
149: }
150: }
151: netdev_opens++;
152: f->f_devdata = nfs_root_node;
153: return (error);
154: }
155:
156: int
157: net_close(f)
158: struct open_file *f;
159: {
160:
161: #ifdef NETIF_DEBUG
162: if (debug)
163: printf("net_close: opens=%d\n", netdev_opens);
164: #endif
165:
166: /* On last close, do netif close, etc. */
167: f->f_devdata = NULL;
168: /* Extra close call? */
169: if (netdev_opens <= 0)
170: return (0);
171: netdev_opens--;
172: /* Not last close? */
173: if (netdev_opens > 0)
174: return(0);
175: rootip.s_addr = 0;
176: if (netdev_sock >= 0) {
177: if (debug)
178: printf("net_close: calling netif_close()\n");
179: netif_close(netdev_sock);
180: netdev_sock = -1;
181: }
182: return (0);
183: }
184:
185: int
186: net_ioctl()
187: {
188: return EIO;
189: }
190:
191: int
192: net_strategy()
193: {
194: return EIO;
195: }
196:
197: int
198: net_getparams(sock)
199: int sock;
200: {
201: /*
202: * Get info for NFS boot: our IP address, our hostname,
203: * server IP address, and our root path on the server.
204: * There are two ways to do this: The old, Sun way,
205: * and the more modern, BOOTP way. (RFC951, RFC1048)
206: */
207:
208: #ifdef SUN_BOOTPARAMS
209: /* Get our IP address. (rarp.c) */
210: if (rarp_getipaddress(sock)) {
211: printf("net_open: RARP failed\n");
212: return (EIO);
213: }
214: #else /* BOOTPARAMS */
215: /*
216: * Get boot info using BOOTP. (RFC951, RFC1048)
217: * This also gets the server IP address, gateway,
218: * root path, etc.
219: */
220: bootp(sock);
221: if (myip.s_addr == 0) {
222: printf("net_open: BOOTP failed\n");
223: return (EIO);
224: }
225: #endif /* BOOTPARAMS */
226:
227: printf("boot: client addr: %s\n", inet_ntoa(myip));
228:
229: #ifdef SUN_BOOTPARAMS
230: /* Get our hostname, server IP address, gateway. */
231: if (bp_whoami(sock)) {
232: printf("net_open: bootparam/whoami RPC failed\n");
233: return (EIO);
234: }
235: #endif /* BOOTPARAMS */
236:
237: printf("boot: client name: %s\n", hostname);
238: if (gateip.s_addr) {
239: printf("boot: subnet mask: %s\n", intoa(netmask));
240: printf("boot: net gateway: %s\n", inet_ntoa(gateip));
241: }
242:
243: #ifdef SUN_BOOTPARAMS
244: /* Get the root pathname. */
245: if (bp_getfile(sock, "root", &rootip, rootpath)) {
246: printf("net_open: bootparam/getfile RPC failed\n");
247: return (EIO);
248: }
249: #endif /* BOOTPARAMS */
250:
251: printf("boot: server addr: %s\n", inet_ntoa(rootip));
252: printf("boot: server path: %s\n", rootpath);
253:
254: return (0);
255: }
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