sem_init.3: Mark up SEM_VALUE_MAX.
[dragonfly.git] / libexec / bootpd / hwaddr.c
blob8f12ed822cb8d2b77f5814e604f695bc1ba71475
1 /*
2 * hwaddr.c - routines that deal with hardware addresses.
3 * (i.e. Ethernet)
5 * $FreeBSD: src/libexec/bootpd/hwaddr.c,v 1.7.2.1 2003/02/15 05:36:01 kris Exp $
6 */
8 #include <sys/types.h>
9 #include <sys/param.h>
10 #include <sys/socket.h>
11 #include <sys/ioctl.h>
13 #if defined(SUNOS) || defined(SVR4)
14 #include <sys/sockio.h>
15 #endif
16 #ifdef SVR4
17 #include <sys/stream.h>
18 #include <stropts.h>
19 #include <fcntl.h>
20 #endif
22 #ifdef _AIX32
23 #include <sys/time.h> /* for struct timeval in net/if.h */
24 #include <net/if.h> /* for struct ifnet in net/if_arp.h */
25 #endif
27 #include <net/if_arp.h>
28 #include <netinet/in.h>
30 #ifdef WIN_TCP
31 #include <netinet/if_ether.h>
32 #include <sys/dlpi.h>
33 #endif
35 #include <stdio.h>
36 #ifndef NO_UNISTD
37 #include <unistd.h>
38 #endif
39 #include <syslog.h>
41 #ifndef USE_BFUNCS
42 /* Yes, memcpy is OK here (no overlapped copies). */
43 #include <memory.h>
44 #define bcopy(a,b,c) memcpy(b,a,c)
45 #define bzero(p,l) memset(p,0,l)
46 #define bcmp(a,b,c) memcmp(a,b,c)
47 #endif
49 #ifndef ATF_INUSE /* Not defined on some systems (i.e. Linux) */
50 #define ATF_INUSE 0
51 #endif
53 /* For BSD 4.4, set arp entry by writing to routing socket */
54 #if defined(BSD)
55 #if BSD >= 199306
56 extern int bsd_arp_set (struct in_addr *, char *, int);
57 #endif
58 #endif
60 #include "bptypes.h"
61 #include "hwaddr.h"
62 #include "report.h"
64 extern int debug;
67 * Hardware address lengths (in bytes) and network name based on hardware
68 * type code. List in order specified by Assigned Numbers RFC; Array index
69 * is hardware type code. Entries marked as zero are unknown to the author
70 * at this time. . . .
73 struct hwinfo hwinfolist[] =
75 {0, "Reserved"}, /* Type 0: Reserved (don't use this) */
76 {6, "Ethernet"}, /* Type 1: 10Mb Ethernet (48 bits) */
77 {1, "3Mb Ethernet"}, /* Type 2: 3Mb Ethernet (8 bits) */
78 {0, "AX.25"}, /* Type 3: Amateur Radio AX.25 */
79 {1, "ProNET"}, /* Type 4: Proteon ProNET Token Ring */
80 {0, "Chaos"}, /* Type 5: Chaos */
81 {6, "IEEE 802"}, /* Type 6: IEEE 802 Networks */
82 {0, "ARCNET"} /* Type 7: ARCNET */
84 int hwinfocnt = NELEM(hwinfolist);
88 * Setup the arp cache so that IP address 'ia' will be temporarily
89 * bound to hardware address 'ha' of length 'len'.
91 * s socket fd
92 * ia protocol address
93 * hafamily HW address family
94 * halen HW address data
96 void
97 setarp(int s, struct in_addr *ia, int hafamily, u_char *haddr, int halen)
99 #ifdef SIOCSARP
100 #ifdef WIN_TCP
101 /* This is an SVR4 with different networking code from
102 * Wollongong WIN-TCP. Not quite like the Lachman code.
103 * Code from: drew@drewsun.FEITH.COM (Andrew B. Sudell)
105 #undef SIOCSARP
106 #define SIOCSARP ARP_ADD
107 struct arptab arpreq; /* Arp table entry */
109 bzero((caddr_t) &arpreq, sizeof(arpreq));
110 arpreq.at_flags = ATF_COM;
112 /* Set up IP address */
113 arpreq.at_in = ia->s_addr;
115 /* Set up Hardware Address */
116 bcopy(haddr, arpreq.at_enaddr, halen);
118 /* Set the Date Link type. */
119 /* XXX - Translate (hafamily) to dltype somehow? */
120 arpreq.at_dltype = DL_ETHER;
122 #else /* WIN_TCP */
123 /* Good old Berkeley way. */
124 struct arpreq arpreq; /* Arp request ioctl block */
125 struct sockaddr_in *si;
126 char *p;
128 bzero((caddr_t) &arpreq, sizeof(arpreq));
129 arpreq.arp_flags = ATF_INUSE | ATF_COM;
131 /* Set up the protocol address. */
132 arpreq.arp_pa.sa_family = AF_INET;
133 si = (struct sockaddr_in *) &arpreq.arp_pa;
134 si->sin_addr = *ia;
136 /* Set up the hardware address. */
137 #ifdef __linux__ /* XXX - Do others need this? -gwr */
139 * Linux requires the sa_family field set.
140 * longyear@netcom.com (Al Longyear)
142 arpreq.arp_ha.sa_family = hafamily;
143 #endif /* linux */
145 /* This variable is just to help catch type mismatches. */
146 p = arpreq.arp_ha.sa_data;
147 bcopy(haddr, p, halen);
148 #endif /* WIN_TCP */
150 #ifdef SVR4
152 * And now the stuff for System V Rel 4.x which does not
153 * appear to allow SIOCxxx ioctls on a socket descriptor.
154 * Thanks to several people: (all sent the same fix)
155 * Barney Wolff <barney@databus.com>,
156 * bear@upsys.se (Bj|rn Sj|holm),
157 * Michael Kuschke <Michael.Kuschke@Materna.DE>,
160 int fd;
161 struct strioctl iocb;
163 if ((fd=open("/dev/arp", O_RDWR)) < 0) {
164 report(LOG_ERR, "open /dev/arp: %s\n", get_errmsg());
166 iocb.ic_cmd = SIOCSARP;
167 iocb.ic_timout = 0;
168 iocb.ic_dp = (char *)&arpreq;
169 iocb.ic_len = sizeof(arpreq);
170 if (ioctl(fd, I_STR, (caddr_t)&iocb) < 0) {
171 report(LOG_ERR, "ioctl I_STR: %s\n", get_errmsg());
173 close (fd);
175 #else /* SVR4 */
177 * On SunOS, the ioctl sometimes returns ENXIO, and it
178 * appears to happen when the ARP cache entry you tried
179 * to add is already in the cache. (Sigh...)
180 * XXX - Should this error simply be ignored? -gwr
182 if (ioctl(s, SIOCSARP, (caddr_t) &arpreq) < 0) {
183 report(LOG_ERR, "ioctl SIOCSARP: %s", get_errmsg());
185 #endif /* SVR4 */
186 #else /* SIOCSARP */
187 #if defined(BSD) && (BSD >= 199306)
188 bsd_arp_set(ia, haddr, halen);
189 #else
191 * Oh well, SIOCSARP is not defined. Just run arp(8).
192 * Need to delete partial entry first on some systems.
193 * XXX - Gag!
195 int status;
196 char buf[256];
197 char *a;
198 extern char *inet_ntoa();
200 a = inet_ntoa(*ia);
201 snprintf(buf, sizeof(buf), "arp -d %s; arp -s %s %s temp",
202 a, a, haddrtoa(haddr, halen));
203 if (debug > 2)
204 report(LOG_INFO, "%s", buf);
205 status = system(buf);
206 if (status)
207 report(LOG_ERR, "arp failed, exit code=0x%x", status);
208 return;
209 #endif /* ! 4.4 BSD */
210 #endif /* SIOCSARP */
215 * Convert a hardware address to an ASCII string.
217 char *
218 haddrtoa(u_char *haddr, int hlen)
220 static char haddrbuf[3 * MAXHADDRLEN + 1];
221 char *bufptr;
223 if (hlen > MAXHADDRLEN)
224 hlen = MAXHADDRLEN;
226 bufptr = haddrbuf;
227 while (hlen > 0) {
228 sprintf(bufptr, "%02X:", (unsigned) (*haddr++ & 0xFF));
229 bufptr += 3;
230 hlen--;
232 bufptr[-1] = 0;
233 return (haddrbuf);
238 * haddr_conv802()
239 * --------------
241 * Converts a backwards address to a canonical address and a canonical address
242 * to a backwards address.
244 * INPUTS:
245 * adr_in - pointer to six byte string to convert (unsigned char *)
246 * addr_len - how many bytes to convert
248 * OUTPUTS:
249 * addr_out - The string is updated to contain the converted address.
251 * CALLER:
252 * many
254 * DATA:
255 * Uses conv802table to bit-reverse the address bytes.
258 static u_char conv802table[256] =
260 /* 0x00 */ 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
261 /* 0x08 */ 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
262 /* 0x10 */ 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
263 /* 0x18 */ 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
264 /* 0x20 */ 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
265 /* 0x28 */ 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
266 /* 0x30 */ 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
267 /* 0x38 */ 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
268 /* 0x40 */ 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
269 /* 0x48 */ 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
270 /* 0x50 */ 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
271 /* 0x58 */ 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
272 /* 0x60 */ 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
273 /* 0x68 */ 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
274 /* 0x70 */ 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
275 /* 0x78 */ 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
276 /* 0x80 */ 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
277 /* 0x88 */ 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
278 /* 0x90 */ 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
279 /* 0x98 */ 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
280 /* 0xA0 */ 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
281 /* 0xA8 */ 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
282 /* 0xB0 */ 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
283 /* 0xB8 */ 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
284 /* 0xC0 */ 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
285 /* 0xC8 */ 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
286 /* 0xD0 */ 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
287 /* 0xD8 */ 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
288 /* 0xE0 */ 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
289 /* 0xE8 */ 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
290 /* 0xF0 */ 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
291 /* 0xF8 */ 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF,
294 void
295 haddr_conv802(u_char *addr_in, u_char *addr_out, int len)
297 u_char *lim;
299 lim = addr_out + len;
300 while (addr_out < lim)
301 *addr_out++ = conv802table[*addr_in++];
304 #if 0
306 * For the record, here is a program to generate the
307 * bit-reverse table above.
309 static int
310 bitrev(int n)
312 int i, r;
314 r = 0;
315 for (i = 0; i < 8; i++) {
316 r <<= 1;
317 r |= (n & 1);
318 n >>= 1;
320 return r;
324 main(void)
326 int i;
327 for (i = 0; i <= 0xFF; i++) {
328 if ((i & 7) == 0)
329 printf("/* 0x%02X */", i);
330 printf(" 0x%02X,", bitrev(i));
331 if ((i & 7) == 7)
332 printf("\n");
334 return 0;
337 #endif