1 /* $NetBSD: dev_net.c,v 1.3 2014/08/05 17:55:20 joerg Exp $ */
2
3 /*-
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Tohru Nishimura.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/param.h>
33
34 #include <netinet/in.h>
35 #include <netinet/in_systm.h>
36
37 #include <lib/libsa/stand.h>
38 #include <lib/libsa/net.h>
39 #include <lib/libsa/bootp.h>
40 #include <lib/libsa/nfs.h>
41 #include <lib/libkern/libkern.h>
42
43 #include <machine/bootinfo.h>
44
45 #include "globals.h"
46
47 static int netdev_sock = -1;
48 static int netdev_opens;
49
50 int
net_open(struct open_file * f,...)51 net_open(struct open_file *f, ...)
52
53 {
54 va_list ap;
55 char *file, *proto;
56 int error;
57 extern struct btinfo_bootpath bi_path;
58
59 va_start(ap, f);
60 file = va_arg(ap, char *);
61 proto = va_arg(ap, char *);
62 va_end(ap);
63
64 if (netdev_opens > 0)
65 return 0;
66
67 if ((netdev_sock = netif_open(NULL)) < 0)
68 return ENXIO; /* never fails indeed */
69
70 error = 0;
71 bootp(netdev_sock); /* send DHCP request */
72 if (myip.s_addr == 0) {
73 error = ENOENT; /* IP address was not found */
74 goto bad;
75 }
76
77 if (file[0] != '\0')
78 snprintf(bootfile, sizeof(bootfile), "%s", file);
79 else if (bootfile[0] == '\0')
80 snprintf(bootfile, sizeof(bootfile), "netbsd");
81
82 if (strcmp(proto, "nfs") == 0
83 && (error = nfs_mount(netdev_sock, rootip, rootpath)) != 0)
84 goto bad;
85
86 snprintf(bi_path.bootpath, sizeof(bi_path.bootpath), "%s", bootfile);
87 f->f_devdata = &netdev_sock;
88 netdev_opens++;
89 return 0;
90 bad:
91 netif_close(netdev_sock);
92 netdev_sock = -1;
93 return error;
94 }
95
96 int
net_close(struct open_file * f)97 net_close(struct open_file *f)
98
99 {
100 f->f_devdata = NULL;
101 if (--netdev_opens > 0)
102 return 0;
103 netif_close(netdev_sock);
104 netdev_sock = -1;
105 return 0;
106 }
107
108 int
net_strategy(void * devdata,int rw,daddr_t dblk,size_t size,void * p,size_t * rsize)109 net_strategy(void *devdata, int rw, daddr_t dblk, size_t size,
110 void *p, size_t *rsize)
111 {
112
113 return EIO;
114 }
115