1 /* $NetBSD: net.c,v 1.11 2021/04/12 03:55:40 mrg Exp $ */
2
3 /*
4 * Copyright (c) 1995 Gordon W. Ross
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 /*
29 * This module implements a "raw device" interface suitable for
30 * use by the stand-alone I/O library NFS code. This interface
31 * does not support any "block" access, and exists only for the
32 * purpose of initializing the network interface, getting boot
33 * parameters, and performing the NFS mount.
34 *
35 * At open time, this does:
36 *
37 * find interface - netif_open()
38 * RARP for IP address - rarp_getipaddress()
39 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
40 * RPC/mountd - nfs_mount(sock, ip, path)
41 *
42 * the root file handle from mountd is saved in a global
43 * for use by the NFS open code (NFS/lookup).
44 */
45
46 #include <sys/param.h>
47 #include <sys/socket.h>
48 #include <net/if.h>
49 #include <netinet/in.h>
50 #include <netinet/in_systm.h>
51
52 #include <lib/libsa/stand.h>
53 #include <lib/libsa/net.h>
54 #include <lib/libsa/netif.h>
55 #include <lib/libsa/bootparam.h>
56 #include <lib/libsa/bootp.h>
57 #include <lib/libsa/nfs.h>
58
59 #include <lib/libkern/libkern.h>
60
61 #include <sparc/stand/common/promdev.h>
62
63 int netdev_sock = -1;
64 static int open_count;
65
66 static int net_mountroot_bootparams(void);
67 static int net_mountroot_bootp(void);
68
69 /*
70 * Called by devopen after it sets f->f_dev to our devsw entry.
71 * This opens the low-level device and sets f->f_devdata.
72 */
73 int
net_open(struct promdata * pd)74 net_open(struct promdata *pd)
75 {
76 int error = 0;
77
78 /* On first open, do netif open, mount, etc. */
79 if (open_count == 0) {
80 /* Find network interface. */
81 if ((netdev_sock = netif_open(pd)) < 0) {
82 error = errno;
83 goto bad;
84 }
85 if ((error = net_mountroot()) != 0)
86 goto bad;
87 }
88 open_count++;
89 bad:
90 return (error);
91 }
92
93 int
net_close(struct promdata * pd)94 net_close(struct promdata *pd)
95 {
96 /* On last close, do netif close, etc. */
97 if (open_count <= 0)
98 return (0);
99
100 if (--open_count == 0)
101 return (netif_close(netdev_sock));
102
103 return (0);
104 }
105
106 int
net_mountroot_bootparams(void)107 net_mountroot_bootparams(void)
108 {
109 printf("Trying BOOTPARAMS protocol... ");
110
111 /* Get our IP address. (rarp.c) */
112 if (rarp_getipaddress(netdev_sock) == -1)
113 return (errno);
114
115 printf("ip address: %s", inet_ntoa(myip));
116
117 /* Get our hostname, server IP address. */
118 if (bp_whoami(netdev_sock))
119 return (errno);
120
121 printf(", hostname: %s\n", hostname);
122
123 /* Get the root pathname. */
124 if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
125 return (errno);
126
127 return (0);
128 }
129
130 int
net_mountroot_bootp(void)131 net_mountroot_bootp(void)
132 {
133 printf("Trying BOOTP protocol... ");
134
135 bootp(netdev_sock);
136
137 if (myip.s_addr == 0)
138 return(ENOENT);
139
140 printf("ip address: %s", inet_ntoa(myip));
141
142 if (hostname[0])
143 printf(", hostname: %s", hostname);
144 if (netmask)
145 printf(", netmask: %s", intoa(netmask));
146 if (gateip.s_addr)
147 printf(", gateway: %s", inet_ntoa(gateip));
148 printf("\n");
149
150 return (0);
151 }
152
153 int
net_mountroot(void)154 net_mountroot(void)
155 {
156 int error;
157
158 #ifdef DEBUG
159 printf("net_mountroot\n");
160 #endif
161
162 /*
163 * Get info for NFS boot: our IP address, our hostname,
164 * server IP address, and our root path on the server.
165 * There are two ways to do this: The old, Sun way,
166 * and the more modern, BOOTP way. (RFC951, RFC1048)
167 */
168
169 /* Try BOOTP first */
170 error = net_mountroot_bootp();
171 /* Historically, we've used BOOTPARAMS, so try that next */
172 if (error != 0)
173 error = net_mountroot_bootparams();
174 if (error != 0)
175 return (error);
176
177 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
178
179 /* Get the NFS file handle (mount). */
180 if (nfs_mount(netdev_sock, rootip, rootpath) != 0)
181 return (errno);
182
183 return (0);
184 }
185