1 /* $NetBSD: netif_news.c,v 1.9 2014/09/21 16:35:44 christos 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 * The Sun PROM has a fairly general set of network drivers,
30 * so it is easiest to just replace the netif module with
31 * this adaptation to the PROM network interface.
32 */
33
34 #include <sys/param.h>
35 #include <sys/socket.h>
36
37 #include <net/if.h>
38 #include <net/if_ether.h>
39
40 #include <netinet/in.h>
41 #include <netinet/in_systm.h>
42
43 #include <lib/libsa/stand.h>
44 #include <lib/libsa/net.h>
45 #include <lib/libkern/libkern.h>
46
47 #include <machine/apcall.h>
48 #include <promdev.h>
49
50 #include "netif_news.h"
51
52 #ifdef NETIF_DEBUG
53 int netif_debug;
54 #endif
55
56 static struct iodesc sdesc;
57
58 struct iodesc *
socktodesc(int sock)59 socktodesc(int sock)
60 {
61 if (sock != 0) {
62 return NULL;
63 }
64 return &sdesc;
65 }
66
67 int
netif_news_open(struct romdev * pd)68 netif_news_open(struct romdev *pd)
69 {
70 struct iodesc *io;
71
72 /* find a free socket */
73 io = &sdesc;
74 if (io->io_netif) {
75 #ifdef DEBUG
76 printf("netif_open: device busy\n");
77 #endif
78 errno = ENFILE;
79 return -1;
80 }
81 memset(io, 0, sizeof(*io));
82
83 io->io_netif = pd;
84
85 /* Put our ethernet address in io->myea */
86 prom_getether(pd, io->myea);
87
88 return 0;
89 }
90
91 void
netif_news_close(int fd)92 netif_news_close(int fd)
93 {
94 struct iodesc *io;
95
96 io = &sdesc;
97 io->io_netif = NULL;
98 }
99
100 /*
101 * Send a packet. The ether header is already there.
102 * Return the length sent (or -1 on error).
103 */
104 ssize_t
netif_put(struct iodesc * desc,void * pkt,size_t len)105 netif_put(struct iodesc *desc, void *pkt, size_t len)
106 {
107 struct romdev *pd;
108 ssize_t rv;
109 size_t sendlen;
110
111 pd = (struct romdev *)desc->io_netif;
112
113 #ifdef NETIF_DEBUG
114 if (netif_debug) {
115 struct ether_header *eh;
116
117 printf("netif_put: desc=0x%x pkt=0x%x len=%d\n",
118 desc, pkt, len);
119 eh = pkt;
120 printf("dst: %s ", ether_sprintf(eh->ether_dhost));
121 printf("src: %s ", ether_sprintf(eh->ether_shost));
122 printf("type: 0x%x\n", eh->ether_type & 0xFFFF);
123 }
124 #endif
125
126 sendlen = len;
127 if (sendlen < 60) {
128 sendlen = 60;
129 #ifdef NETIF_DEBUG
130 printf("netif_put: length padded to %d\n", sendlen);
131 #endif
132 }
133
134 rv = apcall_write(pd->fd, pkt, sendlen);
135
136 #ifdef NETIF_DEBUG
137 if (netif_debug)
138 printf("netif_put: xmit returned %d\n", rv);
139 #endif
140
141 return rv;
142 }
143
144 /*
145 * Receive a packet, including the ether header.
146 * Return the total length received (or -1 on error).
147 */
148 ssize_t
netif_get(struct iodesc * desc,void * pkt,size_t maxlen,saseconds_t timo)149 netif_get(struct iodesc *desc, void *pkt, size_t maxlen, saseconds_t timo)
150 {
151 struct romdev *pd;
152 satime_t tick0;
153 ssize_t len;
154
155 pd = (struct romdev *)desc->io_netif;
156
157 #ifdef NETIF_DEBUG
158 if (netif_debug)
159 printf("netif_get: pkt=0x%x, maxlen=%d, tmo=%d\n",
160 pkt, maxlen, timo);
161 #endif
162
163 tick0 = getsecs();
164
165 do {
166 len = apcall_read(pd->fd, pkt, maxlen);
167 } while ((len == 0) && ((getsecs() - tick0) < timo));
168
169 #ifdef NETIF_DEBUG
170 if (netif_debug)
171 printf("netif_get: received len=%d\n", len);
172 #endif
173
174 if (len < 12)
175 return -1;
176
177 #ifdef NETIF_DEBUG
178 if (netif_debug) {
179 struct ether_header *eh = pkt;
180
181 printf("dst: %s ", ether_sprintf(eh->ether_dhost));
182 printf("src: %s ", ether_sprintf(eh->ether_shost));
183 printf("type: 0x%x\n", eh->ether_type & 0xFFFF);
184 }
185 #endif
186
187 return len;
188 }
189
190 int
prom_getether(struct romdev * pd,u_char * ea)191 prom_getether(struct romdev *pd, u_char *ea)
192 {
193
194 if (apcall_ioctl(pd->fd, APIOCGIFHWADDR, ea))
195 return -1;
196
197 #ifdef BOOT_DEBUG
198 printf("hardware address %s\n", ether_sprintf(ea));
199 #endif
200
201 return 0;
202 }
203
204 satime_t
getsecs(void)205 getsecs(void)
206 {
207 u_int t[2];
208
209 apcall_gettimeofday(t); /* time = t[0](s) + t[1](ns) */
210 return t[0];
211 }
212