Annotation of sys/arch/i386/stand/libsa/pxe_net.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: pxe_net.c,v 1.2 2004/04/07 18:00:55 tom Exp $ */
2: /* $NetBSD: dev_net.c,v 1.4 2003/03/12 13:15:08 drochner Exp $ */
3:
4: /*-
5: * Copyright (c) 1997 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Gordon W. Ross.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the NetBSD
22: * Foundation, Inc. and its contributors.
23: * 4. Neither the name of The NetBSD Foundation nor the names of its
24: * contributors may be used to endorse or promote products derived
25: * from this software without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37: * POSSIBILITY OF SUCH DAMAGE.
38: */
39:
40: /*
41: * This module implements a "raw device" interface suitable for
42: * use by the stand-alone I/O library NFS and TFTP code. This interface
43: * does not support any "block" access, and exists only for the
44: * purpose of initializing the network interface and getting boot
45: * parameters.
46: *
47: * At open time, this does:
48: *
49: * find interface - netif_open()
50: * BOOTP for IP address - bootp()
51: */
52:
53: #include <sys/param.h>
54: #include <sys/socket.h>
55: #include <net/if.h>
56: #include <netinet/in.h>
57: #include <netinet/in_systm.h>
58:
59: #include <lib/libkern/libkern.h>
60:
61: #include <lib/libsa/stand.h>
62: #include <lib/libsa/net.h>
63: #include "pxe_netif.h"
64: #include "pxe_net.h"
65:
66: static int netdev_sock = -1;
67: static int netdev_opens;
68:
69: int net_getparams(int);
70:
71: /*
72: * Called by devopen after it sets f->f_dev to our devsw entry.
73: * This opens the low-level device and sets f->f_devdata.
74: * This is declared with variable arguments...
75: */
76: int
77: net_open(struct open_file *f, ...)
78: {
79: int error = 0;
80:
81: #ifdef NETIF_DEBUG
82: if (debug)
83: printf("net_open()\n");
84: #endif
85:
86: /* On first open, do netif open, mount, etc. */
87: if (netdev_opens == 0) {
88: /* Find network interface. */
89: if (netdev_sock < 0) {
90: netdev_sock = pxe_netif_open();
91: if (netdev_sock < 0) {
92: printf("net_open: netif_open() failed\n");
93: return ENXIO;
94: }
95: #ifdef NETIF_DEBUG
96: if (debug)
97: printf("net_open: netif_open() succeeded\n");
98: #endif
99: }
100: #ifdef notyet
101: if (rootip.s_addr == 0) {
102: /* Get root IP address, and path, etc. */
103: error = net_getparams(netdev_sock);
104: if (error) {
105: /* getparams makes its own noise */
106: pxe_netif_close(netdev_sock);
107: netdev_sock = -1;
108: return error;
109: }
110: }
111: #endif
112: }
113: netdev_opens++;
114: f->f_devdata = &netdev_sock;
115: return error;
116: }
117:
118: int
119: net_close(struct open_file *f)
120: {
121: #ifdef NETIF_DEBUG
122: if (debug)
123: printf("net_close: opens=%d\n", netdev_opens);
124: #endif
125:
126: /* On last close, do netif close, etc. */
127: f->f_devdata = NULL;
128: /* Extra close call? */
129: if (netdev_opens <= 0)
130: return 0;
131: netdev_opens--;
132: /* Not last close? */
133: if (netdev_opens > 0)
134: return 0;
135: rootip.s_addr = 0;
136: if (netdev_sock >= 0) {
137: #ifdef NETIF_DEBUG
138: if (debug)
139: printf("net_close: calling netif_close()\n");
140: #endif
141: pxe_netif_close(netdev_sock);
142: netdev_sock = -1;
143: }
144: return 0;
145: }
146:
147: int
148: net_ioctl(struct open_file *f, u_long cmd, void *data)
149: {
150: return EIO;
151: }
152:
153: int
154: net_strategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf,
155: size_t *rsize)
156: {
157: return EIO;
158: }
159:
160:
161: /*
162: * Get info for network boot: our IP address, our hostname,
163: * server IP address, and our root path on the server.
164: */
165: extern int bootp(int);
166:
167: int
168: net_getparams(int sock)
169: {
170: /*
171: * Try to get boot info using BOOTP. If we succeed, then
172: * the server IP address, gateway, and root path will all
173: * be initialized. If any remain uninitialized, we will
174: * use RARP and RPC/bootparam (the Sun way) to get them.
175: */
176: bootp(sock);
177: if (myip.s_addr != 0)
178: return 0;
179: if (debug)
180: printf("net_getparams: BOOTP failed\n");
181:
182: return EIO;
183: }
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