1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
|
/*
* hwaddr.c - routines that deal with hardware addresses.
* (i.e. Ethernet)
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#if defined(SUNOS) || defined(SVR4)
#include <sys/sockio.h>
#endif
#ifdef SVR4
#include <sys/stream.h>
#include <stropts.h>
#include <fcntl.h>
#endif
#include <net/if_arp.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef NO_UNISTD
#include <unistd.h>
#endif
#include <syslog.h>
#ifndef USE_BFUNCS
/* Yes, memcpy is OK here (no overlapped copies). */
#include <memory.h>
#define bcopy(a,b,c) memcpy(b,a,c)
#define bzero(p,l) memset(p,0,l)
#define bcmp(a,b,c) memcmp(a,b,c)
#endif
#include "bptypes.h"
#include "hwaddr.h"
#include "report.h"
extern int debug;
/*
* Hardware address lengths (in bytes) and network name based on hardware
* type code. List in order specified by Assigned Numbers RFC; Array index
* is hardware type code. Entries marked as zero are unknown to the author
* at this time. . . .
*/
struct hwinfo hwinfolist[] =
{
{0, "Reserved"}, /* Type 0: Reserved (don't use this) */
{6, "Ethernet"}, /* Type 1: 10Mb Ethernet (48 bits) */
{1, "3Mb Ethernet"}, /* Type 2: 3Mb Ethernet (8 bits) */
{0, "AX.25"}, /* Type 3: Amateur Radio AX.25 */
{1, "ProNET"}, /* Type 4: Proteon ProNET Token Ring */
{0, "Chaos"}, /* Type 5: Chaos */
{6, "IEEE 802"}, /* Type 6: IEEE 802 Networks */
{0, "ARCNET"} /* Type 7: ARCNET */
};
int hwinfocnt = sizeof(hwinfolist) / sizeof(hwinfolist[0]);
/*
* Setup the arp cache so that IP address 'ia' will be temporarily
* bound to hardware address 'ha' of length 'len'.
*/
void
setarp(s, ia, ha, len)
int s; /* socket fd */
struct in_addr *ia;
u_char *ha;
int len;
{
#ifdef SIOCSARP
struct arpreq arpreq; /* Arp request ioctl block */
struct sockaddr_in *si;
#ifdef SVR4
int fd;
struct strioctl iocb;
#endif /* SVR4 */
bzero((caddr_t) & arpreq, sizeof(arpreq));
arpreq.arp_flags = ATF_INUSE | ATF_COM;
/* Set up the protocol address. */
arpreq.arp_pa.sa_family = AF_INET;
si = (struct sockaddr_in *) &arpreq.arp_pa;
si->sin_addr = *ia;
/* Set up the hardware address. */
bcopy(ha, arpreq.arp_ha.sa_data, len);
#ifdef SVR4
/*
* And now the stuff for System V Rel 4.x which does not
* appear to allow SIOCxxx ioctls on a socket descriptor.
* Thanks to several people: (all sent the same fix)
* Barney Wolff <barney@databus.com>,
* bear@upsys.se (Bj|rn Sj|holm),
* Michael Kuschke <Michael.Kuschke@Materna.DE>,
*/
if ((fd=open("/dev/arp", O_RDWR)) < 0) {
report(LOG_ERR, "open /dev/arp: %s\n", get_errmsg());
}
iocb.ic_cmd = SIOCSARP;
iocb.ic_timout = 0;
iocb.ic_dp = (char *)&arpreq;
iocb.ic_len = sizeof(arpreq);
if (ioctl(fd, I_STR, (caddr_t)&iocb) < 0) {
report(LOG_ERR, "ioctl I_STR: %s\n", get_errmsg());
}
close (fd);
#else /* SVR4 */
/*
* On SunOS, the ioctl sometimes returns ENXIO, and it
* appears to happen when the ARP cache entry you tried
* to add is already in the cache. (Sigh...)
* XXX - Should this error simply be ignored? -gwr
*/
if (ioctl(s, SIOCSARP, (caddr_t) & arpreq) < 0) {
report(LOG_ERR, "ioctl SIOCSARP: %s", get_errmsg());
}
#endif /* SVR4 */
#else /* SIOCSARP */
/*
* Oh well, SIOCSARP is not defined. Just run arp(8).
* XXX - Gag!
*/
int status;
char buf[256];
char *a;
a = inet_ntoa(*ia);
snprintf(buf, sizeof(buf), "(arp -d %s; arp -s %s %s temp) "
"</dev/null >/dev/null 2>&1", a, a, haddrtoa(ha, len));
if (debug > 2)
report(LOG_INFO, "%s", buf);
status = system(buf);
if (status)
report(LOG_ERR, "arp failed, exit code=0x%x", status);
return;
#endif /* SIOCSARP */
}
/*
* Convert a hardware address to an ASCII string.
*/
char *
haddrtoa(haddr, hlen)
u_char *haddr;
int hlen;
{
static char haddrbuf[3 * MAXHADDRLEN + 1];
char *bufptr;
if (hlen > MAXHADDRLEN)
hlen = MAXHADDRLEN;
bufptr = haddrbuf;
while (hlen > 0) {
snprintf(bufptr, sizeof(haddrbuf) - (bufptr - haddrbuf),
"%02X:", (unsigned) (*haddr++ & 0xFF));
bufptr += 3;
hlen--;
}
bufptr[-1] = 0;
return (haddrbuf);
}
/*
* haddr_conv802()
* --------------
*
* Converts a backwards address to a canonical address and a canonical address
* to a backwards address.
*
* INPUTS:
* adr_in - pointer to six byte string to convert (unsigned char *)
* addr_len - how many bytes to convert
*
* OUTPUTS:
* addr_out - The string is updated to contain the converted address.
*
* CALLER:
* many
*
* DATA:
* Uses conv802table to bit-reverse the address bytes.
*/
static u_char conv802table[256] =
{
/* 0x00 */ 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
/* 0x08 */ 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
/* 0x10 */ 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
/* 0x18 */ 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
/* 0x20 */ 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
/* 0x28 */ 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
/* 0x30 */ 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
/* 0x38 */ 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
/* 0x40 */ 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
/* 0x48 */ 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
/* 0x50 */ 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
/* 0x58 */ 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
/* 0x60 */ 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
/* 0x68 */ 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
/* 0x70 */ 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
/* 0x78 */ 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
/* 0x80 */ 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
/* 0x88 */ 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
/* 0x90 */ 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
/* 0x98 */ 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
/* 0xA0 */ 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
/* 0xA8 */ 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
/* 0xB0 */ 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
/* 0xB8 */ 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
/* 0xC0 */ 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
/* 0xC8 */ 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
/* 0xD0 */ 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
/* 0xD8 */ 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
/* 0xE0 */ 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
/* 0xE8 */ 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
/* 0xF0 */ 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
/* 0xF8 */ 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF,
};
void
haddr_conv802(addr_in, addr_out, len)
u_char *addr_in, *addr_out;
int len;
{
u_char *lim;
lim = addr_out + len;
while (addr_out < lim)
*addr_out++ = conv802table[*addr_in++];
}
#if 0
/*
* For the record, here is a program to generate the
* bit-reverse table above.
*/
static int
bitrev(n)
int n;
{
int i, r;
r = 0;
for (i = 0; i < 8; i++) {
r <<= 1;
r |= (n & 1);
n >>= 1;
}
return r;
}
int
main()
{
int i;
for (i = 0; i <= 0xFF; i++) {
if ((i & 7) == 0)
printf("/* 0x%02X */", i);
printf(" 0x%02X,", bitrev(i));
if ((i & 7) == 7)
printf("\n");
}
}
#endif
/*
* Local Variables:
* tab-width: 4
* c-indent-level: 4
* c-argdecl-indent: 4
* c-continued-statement-offset: 4
* c-continued-brace-offset: -4
* c-label-offset: -4
* c-brace-offset: 0
* End:
*/
|
