168 |
return ~(acc & 0xffffUL); |
return ~(acc & 0xffffUL); |
169 |
} |
} |
170 |
|
|
171 |
|
/*-----------------------------------------------------------------------------------*/ |
172 |
|
/* |
173 |
|
* Ascii internet address interpretation routine. |
174 |
|
* The value returned is in network order. |
175 |
|
*/ |
176 |
|
|
177 |
|
/* */ |
178 |
|
/* inet_addr */ |
179 |
|
u32_t inet_addr(const char *cp) |
180 |
|
{ |
181 |
|
struct in_addr val; |
182 |
|
|
183 |
|
if (inet_aton(cp, &val)) { |
184 |
|
return (val.s_addr); |
185 |
|
} |
186 |
|
return (INADDR_NONE); |
187 |
|
} |
188 |
|
|
189 |
|
/* |
190 |
|
* Check whether "cp" is a valid ascii representation |
191 |
|
* of an Internet address and convert to a binary address. |
192 |
|
* Returns 1 if the address is valid, 0 if not. |
193 |
|
* This replaces inet_addr, the return value from which |
194 |
|
* cannot distinguish between failure and a local broadcast address. |
195 |
|
*/ |
196 |
|
/* */ |
197 |
|
/* inet_aton */ |
198 |
|
int inet_aton(const char *cp, struct in_addr *addr) |
199 |
|
{ |
200 |
|
u32_t val; |
201 |
|
int base, n; |
202 |
|
char c; |
203 |
|
u32_t parts[4]; |
204 |
|
u32_t* pp = parts; |
205 |
|
|
206 |
|
c = *cp; |
207 |
|
for (;;) { |
208 |
|
/* |
209 |
|
* Collect number up to ``.''. |
210 |
|
* Values are specified as for C: |
211 |
|
* 0x=hex, 0=octal, isdigit=decimal. |
212 |
|
*/ |
213 |
|
if (!isdigit(c)) |
214 |
|
return (0); |
215 |
|
val = 0; base = 10; |
216 |
|
if (c == '0') { |
217 |
|
c = *++cp; |
218 |
|
if (c == 'x' || c == 'X') |
219 |
|
base = 16, c = *++cp; |
220 |
|
else |
221 |
|
base = 8; |
222 |
|
} |
223 |
|
for (;;) { |
224 |
|
if (isascii(c) && isdigit(c)) { |
225 |
|
val = (val * base) + (c - '0'); |
226 |
|
c = *++cp; |
227 |
|
} else if (base == 16 && isascii(c) && isxdigit(c)) { |
228 |
|
val = (val << 4) | |
229 |
|
(c + 10 - (islower(c) ? 'a' : 'A')); |
230 |
|
c = *++cp; |
231 |
|
} else |
232 |
|
break; |
233 |
|
} |
234 |
|
if (c == '.') { |
235 |
|
/* |
236 |
|
* Internet format: |
237 |
|
* a.b.c.d |
238 |
|
* a.b.c (with c treated as 16 bits) |
239 |
|
* a.b (with b treated as 24 bits) |
240 |
|
*/ |
241 |
|
if (pp >= parts + 3) |
242 |
|
return (0); |
243 |
|
*pp++ = val; |
244 |
|
c = *++cp; |
245 |
|
} else |
246 |
|
break; |
247 |
|
} |
248 |
|
/* |
249 |
|
* Check for trailing characters. |
250 |
|
*/ |
251 |
|
if (c != '\0' && (!isascii(c) || !isspace(c))) |
252 |
|
return (0); |
253 |
|
/* |
254 |
|
* Concoct the address according to |
255 |
|
* the number of parts specified. |
256 |
|
*/ |
257 |
|
n = pp - parts + 1; |
258 |
|
switch (n) { |
259 |
|
|
260 |
|
case 0: |
261 |
|
return (0); /* initial nondigit */ |
262 |
|
|
263 |
|
case 1: /* a -- 32 bits */ |
264 |
|
break; |
265 |
|
|
266 |
|
case 2: /* a.b -- 8.24 bits */ |
267 |
|
if (val > 0xffffff) |
268 |
|
return (0); |
269 |
|
val |= parts[0] << 24; |
270 |
|
break; |
271 |
|
|
272 |
|
case 3: /* a.b.c -- 8.8.16 bits */ |
273 |
|
if (val > 0xffff) |
274 |
|
return (0); |
275 |
|
val |= (parts[0] << 24) | (parts[1] << 16); |
276 |
|
break; |
277 |
|
|
278 |
|
case 4: /* a.b.c.d -- 8.8.8.8 bits */ |
279 |
|
if (val > 0xff) |
280 |
|
return (0); |
281 |
|
val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); |
282 |
|
break; |
283 |
|
} |
284 |
|
if (addr) |
285 |
|
addr->s_addr = htonl(val); |
286 |
|
return (1); |
287 |
|
} |
288 |
|
|
289 |
|
/* Convert numeric IP address into decimal dotted ASCII representation. |
290 |
|
* returns ptr to static buffer; not reentrant! |
291 |
|
*/ |
292 |
|
u8_t *inet_ntoa(u32_t addr) |
293 |
|
{ |
294 |
|
static u8_t str[16]; |
295 |
|
u8_t inv[3]; |
296 |
|
u8_t *rp; |
297 |
|
u8_t *ap; |
298 |
|
u8_t rem; |
299 |
|
u8_t n; |
300 |
|
u8_t i; |
301 |
|
|
302 |
|
rp = str; |
303 |
|
ap = (u8_t *)&addr; |
304 |
|
for(n = 0; n < 4; n++) { |
305 |
|
i = 0; |
306 |
|
do { |
307 |
|
rem = *ap % (u8_t)10; |
308 |
|
*ap /= (u8_t)10; |
309 |
|
inv[i++] = '0' + rem; |
310 |
|
} while(*ap); |
311 |
|
while(i--) |
312 |
|
*rp++ = inv[i]; |
313 |
|
*rp++ = '.'; |
314 |
|
ap++; |
315 |
|
} |
316 |
|
*--rp = 0; |
317 |
|
return str; |
318 |
|
} |
319 |
|
|
320 |
|
/*-----------------------------------------------------------------------------------*/ |
321 |
#ifndef BYTE_ORDER |
#ifndef BYTE_ORDER |
322 |
#error BYTE_ORDER is not defined |
#error BYTE_ORDER is not defined |
323 |
#endif |
#endif |