Contents of /trunk/mkinitrd-magellan/busybox/networking/udhcp/common.c
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Wed Aug 18 21:56:57 2010 UTC (13 years, 9 months ago) by niro
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Wed Aug 18 21:56:57 2010 UTC (13 years, 9 months ago) by niro
File MIME type: text/plain
File size: 17195 byte(s)
-updated to busybox-1.17.1
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001 |
4 | * |
5 | * Licensed under GPLv2, see file LICENSE in this tarball for details. |
6 | */ |
7 | #include "common.h" |
8 | |
9 | #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1 |
10 | unsigned dhcp_verbose; |
11 | #endif |
12 | |
13 | const uint8_t MAC_BCAST_ADDR[6] ALIGN2 = { |
14 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff |
15 | }; |
16 | |
17 | /* Supported options are easily added here. |
18 | * See RFC2132 for more options. |
19 | * OPTION_REQ: these options are requested by udhcpc (unless -o). |
20 | */ |
21 | const struct dhcp_optflag dhcp_optflags[] = { |
22 | /* flags code */ |
23 | { OPTION_IP | OPTION_REQ, 0x01 }, /* DHCP_SUBNET */ |
24 | { OPTION_S32 , 0x02 }, /* DHCP_TIME_OFFSET */ |
25 | { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x03 }, /* DHCP_ROUTER */ |
26 | // { OPTION_IP | OPTION_LIST , 0x04 }, /* DHCP_TIME_SERVER */ |
27 | // { OPTION_IP | OPTION_LIST , 0x05 }, /* DHCP_NAME_SERVER */ |
28 | { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x06 }, /* DHCP_DNS_SERVER */ |
29 | // { OPTION_IP | OPTION_LIST , 0x07 }, /* DHCP_LOG_SERVER */ |
30 | // { OPTION_IP | OPTION_LIST , 0x08 }, /* DHCP_COOKIE_SERVER */ |
31 | { OPTION_IP | OPTION_LIST , 0x09 }, /* DHCP_LPR_SERVER */ |
32 | { OPTION_STRING | OPTION_REQ, 0x0c }, /* DHCP_HOST_NAME */ |
33 | { OPTION_U16 , 0x0d }, /* DHCP_BOOT_SIZE */ |
34 | { OPTION_STRING | OPTION_REQ, 0x0f }, /* DHCP_DOMAIN_NAME */ |
35 | { OPTION_IP , 0x10 }, /* DHCP_SWAP_SERVER */ |
36 | { OPTION_STRING , 0x11 }, /* DHCP_ROOT_PATH */ |
37 | { OPTION_U8 , 0x17 }, /* DHCP_IP_TTL */ |
38 | { OPTION_U16 , 0x1a }, /* DHCP_MTU */ |
39 | { OPTION_IP | OPTION_REQ, 0x1c }, /* DHCP_BROADCAST */ |
40 | { OPTION_STRING , 0x28 }, /* DHCP_NIS_DOMAIN */ |
41 | { OPTION_IP | OPTION_LIST , 0x29 }, /* DHCP_NIS_SERVER */ |
42 | { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a }, /* DHCP_NTP_SERVER */ |
43 | { OPTION_IP | OPTION_LIST , 0x2c }, /* DHCP_WINS_SERVER */ |
44 | { OPTION_U32 , 0x33 }, /* DHCP_LEASE_TIME */ |
45 | { OPTION_IP , 0x36 }, /* DHCP_SERVER_ID */ |
46 | { OPTION_STRING , 0x38 }, /* DHCP_ERR_MESSAGE */ |
47 | //TODO: must be combined with 'sname' and 'file' handling: |
48 | { OPTION_STRING , 0x42 }, /* DHCP_TFTP_SERVER_NAME */ |
49 | { OPTION_STRING , 0x43 }, /* DHCP_BOOT_FILE */ |
50 | //TODO: not a string, but a set of LASCII strings: |
51 | // { OPTION_STRING , 0x4D }, /* DHCP_USER_CLASS */ |
52 | #if ENABLE_FEATURE_UDHCP_RFC3397 |
53 | { OPTION_DNS_STRING | OPTION_LIST , 0x77 }, /* DHCP_DOMAIN_SEARCH */ |
54 | { OPTION_SIP_SERVERS , 0x78 }, /* DHCP_SIP_SERVERS */ |
55 | #endif |
56 | { OPTION_STATIC_ROUTES , 0x79 }, /* DHCP_STATIC_ROUTES */ |
57 | { OPTION_STRING , 0xfc }, /* DHCP_WPAD */ |
58 | |
59 | /* Options below have no match in dhcp_option_strings[], |
60 | * are not passed to dhcpc scripts, and cannot be specified |
61 | * with "option XXX YYY" syntax in dhcpd config file. |
62 | * These entries are only used internally by udhcp[cd] |
63 | * to correctly encode options into packets. |
64 | */ |
65 | |
66 | { OPTION_IP , 0x32 }, /* DHCP_REQUESTED_IP */ |
67 | { OPTION_U8 , 0x35 }, /* DHCP_MESSAGE_TYPE */ |
68 | { OPTION_U16 , 0x39 }, /* DHCP_MAX_SIZE */ |
69 | { OPTION_STRING , 0x3c }, /* DHCP_VENDOR */ |
70 | //FIXME: handling of this option is not exactly correct: |
71 | { OPTION_STRING , 0x3d }, /* DHCP_CLIENT_ID */ |
72 | { 0, 0 } /* zeroed terminating entry */ |
73 | }; |
74 | |
75 | /* Used for converting options from incoming packets to env variables |
76 | * for udhcpc stript, and for setting options for udhcpd via |
77 | * "opt OPTION_NAME OPTION_VALUE" directives in udhcpd.conf file. |
78 | */ |
79 | /* Must match dhcp_optflags[] order */ |
80 | const char dhcp_option_strings[] ALIGN1 = |
81 | "subnet" "\0" /* DHCP_SUBNET */ |
82 | "timezone" "\0" /* DHCP_TIME_OFFSET */ |
83 | "router" "\0" /* DHCP_ROUTER */ |
84 | // "timesrv" "\0" /* DHCP_TIME_SERVER */ |
85 | // "namesrv" "\0" /* DHCP_NAME_SERVER */ |
86 | "dns" "\0" /* DHCP_DNS_SERVER */ |
87 | // "logsrv" "\0" /* DHCP_LOG_SERVER */ |
88 | // "cookiesrv" "\0" /* DHCP_COOKIE_SERVER */ |
89 | "lprsrv" "\0" /* DHCP_LPR_SERVER */ |
90 | "hostname" "\0" /* DHCP_HOST_NAME */ |
91 | "bootsize" "\0" /* DHCP_BOOT_SIZE */ |
92 | "domain" "\0" /* DHCP_DOMAIN_NAME */ |
93 | "swapsrv" "\0" /* DHCP_SWAP_SERVER */ |
94 | "rootpath" "\0" /* DHCP_ROOT_PATH */ |
95 | "ipttl" "\0" /* DHCP_IP_TTL */ |
96 | "mtu" "\0" /* DHCP_MTU */ |
97 | "broadcast" "\0" /* DHCP_BROADCAST */ |
98 | "nisdomain" "\0" /* DHCP_NIS_DOMAIN */ |
99 | "nissrv" "\0" /* DHCP_NIS_SERVER */ |
100 | "ntpsrv" "\0" /* DHCP_NTP_SERVER */ |
101 | "wins" "\0" /* DHCP_WINS_SERVER */ |
102 | "lease" "\0" /* DHCP_LEASE_TIME */ |
103 | "serverid" "\0" /* DHCP_SERVER_ID */ |
104 | "message" "\0" /* DHCP_ERR_MESSAGE */ |
105 | "tftp" "\0" /* DHCP_TFTP_SERVER_NAME */ |
106 | "bootfile" "\0" /* DHCP_BOOT_FILE */ |
107 | // "userclass" "\0" /* DHCP_USER_CLASS */ |
108 | #if ENABLE_FEATURE_UDHCP_RFC3397 |
109 | "search" "\0" /* DHCP_DOMAIN_SEARCH */ |
110 | // doesn't work in udhcpd.conf since OPTION_SIP_SERVERS |
111 | // is not handled yet by "string->option" conversion code: |
112 | "sipsrv" "\0" /* DHCP_SIP_SERVERS */ |
113 | #endif |
114 | // doesn't work in udhcpd.conf since OPTION_STATIC_ROUTES |
115 | // is not handled yet by "string->option" conversion code: |
116 | "staticroutes" "\0"/* DHCP_STATIC_ROUTES */ |
117 | "wpad" "\0" /* DHCP_WPAD */ |
118 | ; |
119 | |
120 | /* Lengths of the option types in binary form. |
121 | * Used by: |
122 | * udhcp_str2optset: to determine how many bytes to allocate. |
123 | * xmalloc_optname_optval: to estimate string length |
124 | * from binary option length: (option[LEN] / dhcp_option_lengths[opt_type]) |
125 | * is the number of elements, multiply in by one element's string width |
126 | * (len_of_option_as_string[opt_type]) and you know how wide string you need. |
127 | */ |
128 | const uint8_t dhcp_option_lengths[] ALIGN1 = { |
129 | [OPTION_IP] = 4, |
130 | [OPTION_IP_PAIR] = 8, |
131 | // [OPTION_BOOLEAN] = 1, |
132 | [OPTION_STRING] = 1, /* ignored by udhcp_str2optset */ |
133 | #if ENABLE_FEATURE_UDHCP_RFC3397 |
134 | [OPTION_DNS_STRING] = 1, /* ignored by both udhcp_str2optset and xmalloc_optname_optval */ |
135 | [OPTION_SIP_SERVERS] = 1, |
136 | #endif |
137 | [OPTION_U8] = 1, |
138 | [OPTION_U16] = 2, |
139 | // [OPTION_S16] = 2, |
140 | [OPTION_U32] = 4, |
141 | [OPTION_S32] = 4, |
142 | /* Just like OPTION_STRING, we use minimum length here */ |
143 | [OPTION_STATIC_ROUTES] = 5, |
144 | }; |
145 | |
146 | |
147 | #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2 |
148 | static void log_option(const char *pfx, const uint8_t *opt) |
149 | { |
150 | if (dhcp_verbose >= 2) { |
151 | char buf[256 * 2 + 2]; |
152 | *bin2hex(buf, (void*) (opt + OPT_DATA), opt[OPT_LEN]) = '\0'; |
153 | bb_info_msg("%s: 0x%02x %s", pfx, opt[OPT_CODE], buf); |
154 | } |
155 | } |
156 | #else |
157 | # define log_option(pfx, opt) ((void)0) |
158 | #endif |
159 | |
160 | unsigned FAST_FUNC udhcp_option_idx(const char *name) |
161 | { |
162 | int n = index_in_strings(dhcp_option_strings, name); |
163 | if (n >= 0) |
164 | return n; |
165 | |
166 | { |
167 | char buf[sizeof(dhcp_option_strings)]; |
168 | char *d = buf; |
169 | const char *s = dhcp_option_strings; |
170 | while (s < dhcp_option_strings + sizeof(dhcp_option_strings) - 2) { |
171 | *d++ = (*s == '\0' ? ' ' : *s); |
172 | s++; |
173 | } |
174 | *d = '\0'; |
175 | bb_error_msg_and_die("unknown option '%s', known options: %s", name, buf); |
176 | } |
177 | } |
178 | |
179 | /* Get an option with bounds checking (warning, result is not aligned) */ |
180 | uint8_t* FAST_FUNC udhcp_get_option(struct dhcp_packet *packet, int code) |
181 | { |
182 | uint8_t *optionptr; |
183 | int len; |
184 | int rem; |
185 | int overload = 0; |
186 | enum { |
187 | FILE_FIELD101 = FILE_FIELD * 0x101, |
188 | SNAME_FIELD101 = SNAME_FIELD * 0x101, |
189 | }; |
190 | |
191 | /* option bytes: [code][len][data1][data2]..[dataLEN] */ |
192 | optionptr = packet->options; |
193 | rem = sizeof(packet->options); |
194 | while (1) { |
195 | if (rem <= 0) { |
196 | bb_error_msg("bad packet, malformed option field"); |
197 | return NULL; |
198 | } |
199 | if (optionptr[OPT_CODE] == DHCP_PADDING) { |
200 | rem--; |
201 | optionptr++; |
202 | continue; |
203 | } |
204 | if (optionptr[OPT_CODE] == DHCP_END) { |
205 | if ((overload & FILE_FIELD101) == FILE_FIELD) { |
206 | /* can use packet->file, and didn't look at it yet */ |
207 | overload |= FILE_FIELD101; /* "we looked at it" */ |
208 | optionptr = packet->file; |
209 | rem = sizeof(packet->file); |
210 | continue; |
211 | } |
212 | if ((overload & SNAME_FIELD101) == SNAME_FIELD) { |
213 | /* can use packet->sname, and didn't look at it yet */ |
214 | overload |= SNAME_FIELD101; /* "we looked at it" */ |
215 | optionptr = packet->sname; |
216 | rem = sizeof(packet->sname); |
217 | continue; |
218 | } |
219 | break; |
220 | } |
221 | len = 2 + optionptr[OPT_LEN]; |
222 | rem -= len; |
223 | if (rem < 0) |
224 | continue; /* complain and return NULL */ |
225 | |
226 | if (optionptr[OPT_CODE] == code) { |
227 | log_option("Option found", optionptr); |
228 | return optionptr + OPT_DATA; |
229 | } |
230 | |
231 | if (optionptr[OPT_CODE] == DHCP_OPTION_OVERLOAD) { |
232 | overload |= optionptr[OPT_DATA]; |
233 | /* fall through */ |
234 | } |
235 | optionptr += len; |
236 | } |
237 | |
238 | /* log3 because udhcpc uses it a lot - very noisy */ |
239 | log3("Option 0x%02x not found", code); |
240 | return NULL; |
241 | } |
242 | |
243 | /* Return the position of the 'end' option (no bounds checking) */ |
244 | int FAST_FUNC udhcp_end_option(uint8_t *optionptr) |
245 | { |
246 | int i = 0; |
247 | |
248 | while (optionptr[i] != DHCP_END) { |
249 | if (optionptr[i] != DHCP_PADDING) |
250 | i += optionptr[i + OPT_LEN] + OPT_DATA-1; |
251 | i++; |
252 | } |
253 | return i; |
254 | } |
255 | |
256 | /* Add an option (supplied in binary form) to the options. |
257 | * Option format: [code][len][data1][data2]..[dataLEN] |
258 | */ |
259 | void FAST_FUNC udhcp_add_binary_option(struct dhcp_packet *packet, uint8_t *addopt) |
260 | { |
261 | unsigned len; |
262 | uint8_t *optionptr = packet->options; |
263 | unsigned end = udhcp_end_option(optionptr); |
264 | |
265 | len = OPT_DATA + addopt[OPT_LEN]; |
266 | /* end position + (option code/length + addopt length) + end option */ |
267 | if (end + len + 1 >= DHCP_OPTIONS_BUFSIZE) { |
268 | //TODO: learn how to use overflow option if we exhaust packet->options[] |
269 | bb_error_msg("option 0x%02x did not fit into the packet", |
270 | addopt[OPT_CODE]); |
271 | return; |
272 | } |
273 | log_option("Adding option", addopt); |
274 | memcpy(optionptr + end, addopt, len); |
275 | optionptr[end + len] = DHCP_END; |
276 | } |
277 | |
278 | /* Add an one to four byte option to a packet */ |
279 | void FAST_FUNC udhcp_add_simple_option(struct dhcp_packet *packet, uint8_t code, uint32_t data) |
280 | { |
281 | const struct dhcp_optflag *dh; |
282 | |
283 | for (dh = dhcp_optflags; dh->code; dh++) { |
284 | if (dh->code == code) { |
285 | uint8_t option[6], len; |
286 | |
287 | option[OPT_CODE] = code; |
288 | len = dhcp_option_lengths[dh->flags & OPTION_TYPE_MASK]; |
289 | option[OPT_LEN] = len; |
290 | if (BB_BIG_ENDIAN) |
291 | data <<= 8 * (4 - len); |
292 | /* Assignment is unaligned! */ |
293 | move_to_unaligned32(&option[OPT_DATA], data); |
294 | udhcp_add_binary_option(packet, option); |
295 | return; |
296 | } |
297 | } |
298 | |
299 | bb_error_msg("can't add option 0x%02x", code); |
300 | } |
301 | |
302 | /* Find option 'code' in opt_list */ |
303 | struct option_set* FAST_FUNC udhcp_find_option(struct option_set *opt_list, uint8_t code) |
304 | { |
305 | while (opt_list && opt_list->data[OPT_CODE] < code) |
306 | opt_list = opt_list->next; |
307 | |
308 | if (opt_list && opt_list->data[OPT_CODE] == code) |
309 | return opt_list; |
310 | return NULL; |
311 | } |
312 | |
313 | /* Parse string to IP in network order */ |
314 | int FAST_FUNC udhcp_str2nip(const char *str, void *arg) |
315 | { |
316 | len_and_sockaddr *lsa; |
317 | |
318 | lsa = host_and_af2sockaddr(str, 0, AF_INET); |
319 | if (!lsa) |
320 | return 0; |
321 | *(uint32_t*)arg = lsa->u.sin.sin_addr.s_addr; |
322 | free(lsa); |
323 | return 1; |
324 | } |
325 | |
326 | /* udhcp_str2optset: |
327 | * Parse string option representation to binary form and add it to opt_list. |
328 | * Called to parse "udhcpc -x OPTNAME:OPTVAL" |
329 | * and to parse udhcpd.conf's "opt OPTNAME OPTVAL" directives. |
330 | */ |
331 | /* helper for the helper */ |
332 | static char *allocate_tempopt_if_needed( |
333 | const struct dhcp_optflag *optflag, |
334 | char *buffer, |
335 | int *length_p) |
336 | { |
337 | char *allocated = NULL; |
338 | if ((optflag->flags & OPTION_TYPE_MASK) == OPTION_BIN) { |
339 | const char *end; |
340 | allocated = xstrdup(buffer); /* more than enough */ |
341 | end = hex2bin(allocated, buffer, 255); |
342 | if (errno) |
343 | bb_error_msg_and_die("malformed hex string '%s'", buffer); |
344 | *length_p = end - allocated; |
345 | } |
346 | return allocated; |
347 | } |
348 | /* helper: add an option to the opt_list */ |
349 | static NOINLINE void attach_option( |
350 | struct option_set **opt_list, |
351 | const struct dhcp_optflag *optflag, |
352 | char *buffer, |
353 | int length) |
354 | { |
355 | struct option_set *existing, *new, **curr; |
356 | char *allocated = NULL; |
357 | |
358 | existing = udhcp_find_option(*opt_list, optflag->code); |
359 | if (!existing) { |
360 | log2("Attaching option %02x to list", optflag->code); |
361 | allocated = allocate_tempopt_if_needed(optflag, buffer, &length); |
362 | #if ENABLE_FEATURE_UDHCP_RFC3397 |
363 | if ((optflag->flags & OPTION_TYPE_MASK) == OPTION_DNS_STRING) { |
364 | /* reuse buffer and length for RFC1035-formatted string */ |
365 | allocated = buffer = (char *)dname_enc(NULL, 0, buffer, &length); |
366 | } |
367 | #endif |
368 | /* make a new option */ |
369 | new = xmalloc(sizeof(*new)); |
370 | new->data = xmalloc(length + OPT_DATA); |
371 | new->data[OPT_CODE] = optflag->code; |
372 | new->data[OPT_LEN] = length; |
373 | memcpy(new->data + OPT_DATA, buffer, length); |
374 | |
375 | curr = opt_list; |
376 | while (*curr && (*curr)->data[OPT_CODE] < optflag->code) |
377 | curr = &(*curr)->next; |
378 | |
379 | new->next = *curr; |
380 | *curr = new; |
381 | goto ret; |
382 | } |
383 | |
384 | if (optflag->flags & OPTION_LIST) { |
385 | unsigned old_len; |
386 | |
387 | /* add it to an existing option */ |
388 | log2("Attaching option %02x to existing member of list", optflag->code); |
389 | allocated = allocate_tempopt_if_needed(optflag, buffer, &length); |
390 | old_len = existing->data[OPT_LEN]; |
391 | #if ENABLE_FEATURE_UDHCP_RFC3397 |
392 | if ((optflag->flags & OPTION_TYPE_MASK) == OPTION_DNS_STRING) { |
393 | /* reuse buffer and length for RFC1035-formatted string */ |
394 | allocated = buffer = (char *)dname_enc(existing->data + OPT_DATA, old_len, buffer, &length); |
395 | } |
396 | #endif |
397 | if (old_len + length < 255) { |
398 | /* actually 255 is ok too, but adding a space can overlow it */ |
399 | |
400 | existing->data = xrealloc(existing->data, OPT_DATA + 1 + old_len + length); |
401 | if ((optflag->flags & OPTION_TYPE_MASK) == OPTION_STRING) { |
402 | /* add space separator between STRING options in a list */ |
403 | existing->data[OPT_DATA + old_len] = ' '; |
404 | old_len++; |
405 | } |
406 | memcpy(existing->data + OPT_DATA + old_len, buffer, length); |
407 | existing->data[OPT_LEN] = old_len + length; |
408 | } /* else, ignore the data, we could put this in a second option in the future */ |
409 | } /* else, ignore the new data */ |
410 | |
411 | ret: |
412 | free(allocated); |
413 | } |
414 | |
415 | int FAST_FUNC udhcp_str2optset(const char *const_str, void *arg) |
416 | { |
417 | struct option_set **opt_list = arg; |
418 | char *opt, *val, *endptr; |
419 | char *str; |
420 | const struct dhcp_optflag *optflag; |
421 | struct dhcp_optflag bin_optflag; |
422 | unsigned optcode; |
423 | int retval, length; |
424 | char buffer[8] ALIGNED(4); |
425 | uint16_t *result_u16 = (uint16_t *) buffer; |
426 | uint32_t *result_u32 = (uint32_t *) buffer; |
427 | |
428 | /* Cheat, the only *const* str possible is "" */ |
429 | str = (char *) const_str; |
430 | opt = strtok(str, " \t="); |
431 | if (!opt) |
432 | return 0; |
433 | |
434 | optcode = bb_strtou(opt, NULL, 0); |
435 | if (!errno && optcode < 255) { |
436 | /* Raw (numeric) option code */ |
437 | bin_optflag.flags = OPTION_BIN; |
438 | bin_optflag.code = optcode; |
439 | optflag = &bin_optflag; |
440 | } else { |
441 | optflag = &dhcp_optflags[udhcp_option_idx(opt)]; |
442 | } |
443 | |
444 | retval = 0; |
445 | do { |
446 | val = strtok(NULL, ", \t"); |
447 | if (!val) |
448 | break; |
449 | length = dhcp_option_lengths[optflag->flags & OPTION_TYPE_MASK]; |
450 | retval = 0; |
451 | opt = buffer; /* new meaning for variable opt */ |
452 | switch (optflag->flags & OPTION_TYPE_MASK) { |
453 | case OPTION_IP: |
454 | retval = udhcp_str2nip(val, buffer); |
455 | break; |
456 | case OPTION_IP_PAIR: |
457 | retval = udhcp_str2nip(val, buffer); |
458 | val = strtok(NULL, ", \t/-"); |
459 | if (!val) |
460 | retval = 0; |
461 | if (retval) |
462 | retval = udhcp_str2nip(val, buffer + 4); |
463 | break; |
464 | case OPTION_STRING: |
465 | #if ENABLE_FEATURE_UDHCP_RFC3397 |
466 | case OPTION_DNS_STRING: |
467 | #endif |
468 | length = strnlen(val, 254); |
469 | if (length > 0) { |
470 | opt = val; |
471 | retval = 1; |
472 | } |
473 | break; |
474 | // case OPTION_BOOLEAN: { |
475 | // static const char no_yes[] ALIGN1 = "no\0yes\0"; |
476 | // buffer[0] = retval = index_in_strings(no_yes, val); |
477 | // retval++; /* 0 - bad; 1: "no" 2: "yes" */ |
478 | // break; |
479 | // } |
480 | case OPTION_U8: |
481 | buffer[0] = strtoul(val, &endptr, 0); |
482 | retval = (endptr[0] == '\0'); |
483 | break; |
484 | /* htonX are macros in older libc's, using temp var |
485 | * in code below for safety */ |
486 | /* TODO: use bb_strtoX? */ |
487 | case OPTION_U16: { |
488 | unsigned long tmp = strtoul(val, &endptr, 0); |
489 | *result_u16 = htons(tmp); |
490 | retval = (endptr[0] == '\0' /*&& tmp < 0x10000*/); |
491 | break; |
492 | } |
493 | // case OPTION_S16: { |
494 | // long tmp = strtol(val, &endptr, 0); |
495 | // *result_u16 = htons(tmp); |
496 | // retval = (endptr[0] == '\0'); |
497 | // break; |
498 | // } |
499 | case OPTION_U32: { |
500 | unsigned long tmp = strtoul(val, &endptr, 0); |
501 | *result_u32 = htonl(tmp); |
502 | retval = (endptr[0] == '\0'); |
503 | break; |
504 | } |
505 | case OPTION_S32: { |
506 | long tmp = strtol(val, &endptr, 0); |
507 | *result_u32 = htonl(tmp); |
508 | retval = (endptr[0] == '\0'); |
509 | break; |
510 | } |
511 | case OPTION_BIN: /* handled in attach_option() */ |
512 | opt = val; |
513 | retval = 1; |
514 | default: |
515 | break; |
516 | } |
517 | if (retval) |
518 | attach_option(opt_list, optflag, opt, length); |
519 | } while (retval && optflag->flags & OPTION_LIST); |
520 | |
521 | return retval; |
522 | } |