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odhcp6c: fix compilation with musl 1.2.0
[project/odhcp6c.git] / src / odhcp6c.c
1 /**
2 * Copyright (C) 2012-2014 Steven Barth <steven@midlink.org>
3 * Copyright (C) 2017-2018 Hans Dedecker <dedeckeh@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License v2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 */
15
16 #include <time.h>
17 #include <errno.h>
18 #include <ctype.h>
19 #include <fcntl.h>
20 #include <limits.h>
21 #include <resolv.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <stddef.h>
25 #include <unistd.h>
26 #include <syslog.h>
27 #include <signal.h>
28 #include <string.h>
29 #include <strings.h>
30 #include <stdbool.h>
31
32 #include <net/if.h>
33 #include <sys/syscall.h>
34 #include <arpa/inet.h>
35 #include <linux/if_addr.h>
36
37 #include "odhcp6c.h"
38 #include "ra.h"
39
40 #ifndef IN6_IS_ADDR_UNIQUELOCAL
41 #define IN6_IS_ADDR_UNIQUELOCAL(a) \
42 ((((__const uint32_t *) (a))[0] & htonl (0xfe000000)) \
43 == htonl (0xfc000000))
44 #endif
45 #define ARRAY_SEP " ,\t"
46
47 static void sighandler(int signal);
48 static int usage(void);
49 static int add_opt(const uint16_t code, const uint8_t *data,
50 const uint16_t len);
51 static int parse_opt_data(const char *data, uint8_t **dst,
52 const unsigned int type, const bool array);
53 static int parse_opt(const char *opt);
54
55 static uint8_t *state_data[_STATE_MAX] = {NULL};
56 static size_t state_len[_STATE_MAX] = {0};
57
58 static volatile bool signal_io = false;
59 static volatile bool signal_usr1 = false;
60 static volatile bool signal_usr2 = false;
61 static volatile bool signal_term = false;
62
63 static int urandom_fd = -1, allow_slaac_only = 0;
64 static bool bound = false, release = true, ra = false;
65 static time_t last_update = 0;
66 static char *ifname = NULL;
67
68 static unsigned int script_sync_delay = 10;
69 static unsigned int script_accu_delay = 1;
70
71 static struct odhcp6c_opt opts[] = {
72 { .code = DHCPV6_OPT_CLIENTID, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
73 { .code = DHCPV6_OPT_SERVERID, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
74 { .code = DHCPV6_OPT_IA_NA, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str= NULL },
75 { .code = DHCPV6_OPT_IA_TA, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
76 { .code = DHCPV6_OPT_IA_ADDR, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
77 { .code = DHCPV6_OPT_ORO, .flags = OPT_INTERNAL, .str = NULL },
78 { .code = DHCPV6_OPT_PREF, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
79 { .code = DHCPV6_OPT_ELAPSED, .flags = OPT_INTERNAL, .str = NULL },
80 { .code = DHCPV6_OPT_RELAY_MSG, .flags = OPT_INTERNAL, .str = NULL },
81 { .code = DHCPV6_OPT_AUTH, .flags = OPT_U8 | OPT_NO_PASSTHRU, .str = "authentication" },
82 { .code = DHCPV6_OPT_UNICAST, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
83 { .code = DHCPV6_OPT_STATUS, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
84 { .code = DHCPV6_OPT_RAPID_COMMIT, .flags = OPT_INTERNAL, .str = NULL },
85 { .code = DHCPV6_OPT_USER_CLASS, .flags = OPT_USER_CLASS | OPT_ARRAY, .str = "userclass" },
86 { .code = DHCPV6_OPT_VENDOR_CLASS, .flags = OPT_U8, .str = "vendorclass" },
87 { .code = DHCPV6_OPT_INTERFACE_ID, .flags = OPT_INTERNAL, .str = NULL },
88 { .code = DHCPV6_OPT_RECONF_MESSAGE, .flags = OPT_INTERNAL, .str = NULL },
89 { .code = DHCPV6_OPT_RECONF_ACCEPT, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
90 { .code = DHCPV6_OPT_SIP_SERVER_D, .flags = OPT_DNS_STR | OPT_ORO, .str = "sipserver_d" },
91 { .code = DHCPV6_OPT_SIP_SERVER_A, .flags = OPT_IP6 | OPT_ARRAY | OPT_ORO, .str = "sipserver_a" },
92 { .code = DHCPV6_OPT_DNS_SERVERS, .flags = OPT_IP6 | OPT_ARRAY | OPT_ORO, .str = "dns" },
93 { .code = DHCPV6_OPT_DNS_DOMAIN, .flags = OPT_DNS_STR | OPT_ORO, .str = "search" },
94 { .code = DHCPV6_OPT_IA_PD, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
95 { .code = DHCPV6_OPT_IA_PREFIX, .flags = OPT_INTERNAL, .str = NULL },
96 { .code = DHCPV6_OPT_SNTP_SERVERS, .flags = OPT_IP6 | OPT_ARRAY | OPT_ORO, .str = "sntpservers" },
97 { .code = DHCPV6_OPT_INFO_REFRESH, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU | OPT_ORO | OPT_ORO_STATELESS, .str = NULL },
98 { .code = DHCPV6_OPT_REMOTE_ID, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
99 { .code = DHCPV6_OPT_SUBSCRIBER_ID, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
100 { .code = DHCPV6_OPT_FQDN, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU | OPT_ORO, .str = NULL },
101 { .code = DHCPV6_OPT_ERO, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
102 { .code = DHCPV6_OPT_LQ_QUERY, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
103 { .code = DHCPV6_OPT_CLIENT_DATA, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
104 { .code = DHCPV6_OPT_CLT_TIME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
105 { .code = DHCPV6_OPT_LQ_RELAY_DATA, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
106 { .code = DHCPV6_OPT_LQ_CLIENT_LINK, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
107 { .code = DHCPV6_OPT_RELAY_ID, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
108 { .code = DHCPV6_OPT_NTP_SERVER, .flags = OPT_U8 | OPT_ORO, .str = "ntpserver" },
109 { .code = DHCPV6_OPT_CLIENT_ARCH_TYPE, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
110 { .code = DHCPV6_OPT_AFTR_NAME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU | OPT_ORO, .str = NULL },
111 { .code = DHCPV6_OPT_RSOO, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
112 { .code = DHCPV6_OPT_PD_EXCLUDE, .flags = OPT_INTERNAL | OPT_ORO | OPT_ORO_STATEFUL, .str = NULL },
113 { .code = DHCPV6_OPT_VSS, .flags = OPT_U8, .str = "vss" },
114 { .code = DHCPV6_OPT_LINK_LAYER_ADDRESS, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
115 { .code = DHCPV6_OPT_LINK_ADDRESS, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
116 { .code = DHCPV6_OPT_RADIUS, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
117 { .code = DHCPV6_OPT_SOL_MAX_RT, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU | OPT_ORO | OPT_ORO_SOLICIT, .str = NULL },
118 { .code = DHCPV6_OPT_INF_MAX_RT, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU | OPT_ORO | OPT_ORO_STATELESS, .str = NULL },
119 #ifdef EXT_CER_ID
120 { .code = DHCPV6_OPT_CER_ID, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
121 #endif
122 { .code = DHCPV6_OPT_DHCPV4_MSG, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
123 { .code = DHCPV6_OPT_S46_RULE, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
124 { .code = DHCPV6_OPT_S46_BR, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
125 { .code = DHCPV6_OPT_S46_DMR, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
126 { .code = DHCPV6_OPT_S46_V4V6BIND, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
127 { .code = DHCPV6_OPT_S46_PORTPARAMS, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
128 { .code = DHCPV6_OPT_S46_CONT_MAPE, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU | OPT_ORO, .str = NULL },
129 { .code = DHCPV6_OPT_S46_CONT_MAPT, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU | OPT_ORO, .str = NULL },
130 { .code = DHCPV6_OPT_S46_CONT_LW, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU | OPT_ORO, .str = NULL },
131 { .code = DHCPV6_OPT_LQ_BASE_TIME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
132 { .code = DHCPV6_OPT_LQ_START_TIME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
133 { .code = DHCPV6_OPT_LQ_END_TIME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
134 { .code = DHCPV6_OPT_ANI_ATT, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
135 { .code = DHCPV6_OPT_ANI_NETWORK_NAME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
136 { .code = DHCPV6_OPT_ANI_AP_NAME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
137 { .code = DHCPV6_OPT_ANI_AP_BSSID, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
138 { .code = DHCPV6_OPT_ANI_OPERATOR_ID, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
139 { .code = DHCPV6_OPT_ANI_OPERATOR_REALM, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
140 { .code = DHCPV6_OPT_MUD_URL_V6, .flags = OPT_STR | OPT_NO_PASSTHRU, .str = "mud_url_v6" },
141 { .code = DHCPV6_OPT_F_BINDING_STATUS, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
142 { .code = DHCPV6_OPT_F_CONNECT_FLAGS, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
143 { .code = DHCPV6_OPT_F_DNS_REMOVAL_INFO, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
144 { .code = DHCPV6_OPT_F_DNS_HOST_NAME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
145 { .code = DHCPV6_OPT_F_DNS_ZONE_NAME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
146 { .code = DHCPV6_OPT_F_DNS_FLAGS, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
147 { .code = DHCPV6_OPT_F_EXPIRATION_TIME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
148 { .code = DHCPV6_OPT_F_MAX_UNACKED_BNDUPD, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
149 { .code = DHCPV6_OPT_F_MCLT, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
150 { .code = DHCPV6_OPT_F_PARTNER_LIFETIME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
151 { .code = DHCPV6_OPT_F_PARTNER_LIFETIME_SENT, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
152 { .code = DHCPV6_OPT_F_PARTNER_DOWN_TIME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
153 { .code = DHCPV6_OPT_F_PARTNER_RAW_CLT_TIME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
154 { .code = DHCPV6_OPT_F_PROTOCOL_VERSION, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
155 { .code = DHCPV6_OPT_F_KEEPALIVE_TIME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
156 { .code = DHCPV6_OPT_F_RECONFIGURE_DATA, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
157 { .code = DHCPV6_OPT_F_RELATIONSHIP_NAME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
158 { .code = DHCPV6_OPT_F_SERVER_FLAGS, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
159 { .code = DHCPV6_OPT_F_SERVER_STATE, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
160 { .code = DHCPV6_OPT_F_START_TIME_OF_STATE, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
161 { .code = DHCPV6_OPT_F_STATE_EXPIRATION_TIME, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
162 { .code = DHCPV6_OPT_RELAY_PORT, .flags = OPT_INTERNAL | OPT_NO_PASSTHRU, .str = NULL },
163 { .code = 0, .flags = 0, .str = NULL },
164 };
165
166 int main(_unused int argc, char* const argv[])
167 {
168 static struct in6_addr ifid = IN6ADDR_ANY_INIT;
169 // Allocate resources
170 const char *pidfile = NULL;
171 const char *script = "/usr/sbin/odhcp6c-update";
172 ssize_t l;
173 uint8_t buf[134], *o_data;
174 char *optpos;
175 uint16_t opttype;
176 enum odhcp6c_ia_mode ia_na_mode = IA_MODE_TRY;
177 enum odhcp6c_ia_mode ia_pd_mode = IA_MODE_NONE;
178 struct odhcp6c_opt *opt;
179 int ia_pd_iaid_index = 0;
180 int sol_timeout = DHCPV6_SOL_MAX_RT;
181 int verbosity = 0;
182 bool help = false, daemonize = false;
183 int logopt = LOG_PID;
184 int c, res;
185 unsigned int client_options = DHCPV6_CLIENT_FQDN | DHCPV6_ACCEPT_RECONFIGURE;
186 unsigned int ra_options = RA_RDNSS_DEFAULT_LIFETIME;
187 unsigned int ra_holdoff_interval = RA_MIN_ADV_INTERVAL;
188
189 while ((c = getopt(argc, argv, "S::N:V:P:FB:c:i:r:Ru:Ux:s:kt:m:Lhedp:fav")) != -1) {
190 switch (c) {
191 case 'S':
192 allow_slaac_only = (optarg) ? atoi(optarg) : -1;
193 break;
194
195 case 'N':
196 if (!strcmp(optarg, "force")) {
197 ia_na_mode = IA_MODE_FORCE;
198 allow_slaac_only = -1;
199 } else if (!strcmp(optarg, "none"))
200 ia_na_mode = IA_MODE_NONE;
201 else if (!strcmp(optarg, "try"))
202 ia_na_mode = IA_MODE_TRY;
203 else
204 help = true;
205 break;
206
207 case 'V':
208 opt = odhcp6c_find_opt(DHCPV6_OPT_VENDOR_CLASS);
209 if (!opt) {
210 syslog(LOG_ERR, "Failed to set vendor-class option");
211 return 1;
212 }
213
214 o_data = NULL;
215 res = parse_opt_data(optarg, &o_data, opt->flags & OPT_MASK_SIZE,
216 (opt->flags & OPT_ARRAY) == OPT_ARRAY);
217 if (res > 0) {
218 res = add_opt(opt->code, o_data, res);
219 if (res) {
220 if (res > 0)
221 return 1;
222
223 help = true;
224 }
225 } else
226 help = true;
227
228 free(o_data);
229 break;
230
231 case 'P':
232 if (ia_pd_mode == IA_MODE_NONE)
233 ia_pd_mode = IA_MODE_TRY;
234
235 if (allow_slaac_only >= 0 && allow_slaac_only < 10)
236 allow_slaac_only = 10;
237
238 char *iaid_begin;
239 int iaid_len = 0;
240 int prefix_length = strtoul(optarg, &iaid_begin, 10);
241
242 if (*iaid_begin != '\0' && *iaid_begin != ',' && *iaid_begin != ':') {
243 syslog(LOG_ERR, "invalid argument: '%s'", optarg);
244 return 1;
245 }
246
247 struct odhcp6c_request_prefix prefix = { 0, prefix_length };
248
249 if (*iaid_begin == ',' && (iaid_len = strlen(iaid_begin)) > 1)
250 memcpy(&prefix.iaid, iaid_begin + 1, iaid_len > 4 ? 4 : iaid_len);
251 else if (*iaid_begin == ':')
252 prefix.iaid = htonl((uint32_t)strtoul(&iaid_begin[1], NULL, 16));
253 else
254 prefix.iaid = htonl(++ia_pd_iaid_index);
255
256 if (odhcp6c_add_state(STATE_IA_PD_INIT, &prefix, sizeof(prefix))) {
257 syslog(LOG_ERR, "Failed to set request IPv6-Prefix");
258 return 1;
259 }
260 break;
261
262 case 'F':
263 allow_slaac_only = -1;
264 ia_pd_mode = IA_MODE_FORCE;
265 break;
266
267 case 'c':
268 l = script_unhexlify(&buf[4], sizeof(buf) - 4, optarg);
269 if (l > 0) {
270 buf[0] = 0;
271 buf[1] = DHCPV6_OPT_CLIENTID;
272 buf[2] = 0;
273 buf[3] = l;
274 if (odhcp6c_add_state(STATE_CLIENT_ID, buf, l + 4)) {
275 syslog(LOG_ERR, "Failed to override client-ID");
276 return 1;
277 }
278 } else
279 help = true;
280 break;
281
282 case 'i':
283 if (inet_pton(AF_INET6, optarg, &ifid) != 1)
284 help = true;
285 break;
286
287 case 'r':
288 optpos = optarg;
289 while (optpos[0]) {
290 opttype = htons(strtoul(optarg, &optpos, 10));
291 if (optpos == optarg)
292 break;
293 else if (optpos[0])
294 optarg = &optpos[1];
295
296 if (odhcp6c_add_state(STATE_ORO, &opttype, 2)) {
297 syslog(LOG_ERR, "Failed to add requested option");
298 return 1;
299 }
300 }
301 break;
302
303 case 'R':
304 client_options |= DHCPV6_STRICT_OPTIONS;
305 break;
306
307 case 'u':
308 opt = odhcp6c_find_opt(DHCPV6_OPT_USER_CLASS);
309 if (!opt) {
310 syslog(LOG_ERR, "Failed to set user-class option");
311 return 1;
312 }
313
314 o_data = NULL;
315 res = parse_opt_data(optarg, &o_data, opt->flags & OPT_MASK_SIZE,
316 (opt->flags & OPT_ARRAY) == OPT_ARRAY);
317 if (res > 0) {
318 res = add_opt(opt->code, o_data, res);
319 if (res) {
320 if (res > 0)
321 return 1;
322
323 help = true;
324 }
325 } else
326 help = true;
327
328 free(o_data);
329 break;
330
331 case 'U':
332 client_options |= DHCPV6_IGNORE_OPT_UNICAST;
333 break;
334
335 case 's':
336 script = optarg;
337 break;
338
339 case 'k':
340 release = false;
341 break;
342
343 case 't':
344 sol_timeout = atoi(optarg);
345 break;
346
347 case 'm':
348 ra_holdoff_interval = atoi(optarg);
349 break;
350
351 case 'L':
352 ra_options &= ~RA_RDNSS_DEFAULT_LIFETIME;
353 break;
354
355 case 'e':
356 logopt |= LOG_PERROR;
357 break;
358
359 case 'd':
360 daemonize = true;
361 break;
362
363 case 'p':
364 pidfile = optarg;
365 break;
366
367 case 'f':
368 client_options &= ~DHCPV6_CLIENT_FQDN;
369 break;
370
371 case 'a':
372 client_options &= ~DHCPV6_ACCEPT_RECONFIGURE;
373 break;
374
375 case 'v':
376 ++verbosity;
377 break;
378
379 case 'x':
380 res = parse_opt(optarg);
381 if (res) {
382 if (res > 0)
383 return res;
384
385 help = true;
386 }
387 break;
388
389 default:
390 help = true;
391 break;
392 }
393 }
394
395 if (allow_slaac_only > 0)
396 script_sync_delay = allow_slaac_only;
397
398 openlog("odhcp6c", logopt, LOG_DAEMON);
399 if (!verbosity)
400 setlogmask(LOG_UPTO(LOG_WARNING));
401
402 ifname = argv[optind];
403
404 if (help || !ifname)
405 return usage();
406
407 signal(SIGIO, sighandler);
408 signal(SIGHUP, sighandler);
409 signal(SIGINT, sighandler);
410 signal(SIGTERM, sighandler);
411 signal(SIGUSR1, sighandler);
412 signal(SIGUSR2, sighandler);
413
414 if ((urandom_fd = open("/dev/urandom", O_CLOEXEC | O_RDONLY)) < 0 ||
415 init_dhcpv6(ifname, client_options, sol_timeout) ||
416 ra_init(ifname, &ifid, ra_options, ra_holdoff_interval) ||
417 script_init(script, ifname)) {
418 syslog(LOG_ERR, "failed to initialize: %s", strerror(errno));
419 return 3;
420 }
421
422 if (daemonize) {
423 openlog("odhcp6c", LOG_PID, LOG_DAEMON); // Disable LOG_PERROR
424 if (daemon(0, 0)) {
425 syslog(LOG_ERR, "Failed to daemonize: %s",
426 strerror(errno));
427 return 4;
428 }
429
430 if (!pidfile) {
431 snprintf((char*)buf, sizeof(buf), "/var/run/odhcp6c.%s.pid", ifname);
432 pidfile = (char*)buf;
433 }
434
435 FILE *fp = fopen(pidfile, "w");
436 if (fp) {
437 fprintf(fp, "%i\n", getpid());
438 fclose(fp);
439 }
440 }
441
442 script_call("started", 0, false);
443
444 while (!signal_term) { // Main logic
445 odhcp6c_clear_state(STATE_SERVER_ID);
446 odhcp6c_clear_state(STATE_SERVER_ADDR);
447 odhcp6c_clear_state(STATE_IA_NA);
448 odhcp6c_clear_state(STATE_IA_PD);
449 odhcp6c_clear_state(STATE_SNTP_IP);
450 odhcp6c_clear_state(STATE_NTP_IP);
451 odhcp6c_clear_state(STATE_NTP_FQDN);
452 odhcp6c_clear_state(STATE_SIP_IP);
453 odhcp6c_clear_state(STATE_SIP_FQDN);
454 bound = false;
455
456 syslog(LOG_NOTICE, "(re)starting transaction on %s", ifname);
457
458 signal_usr1 = signal_usr2 = false;
459 int mode = dhcpv6_set_ia_mode(ia_na_mode, ia_pd_mode);
460 if (mode != DHCPV6_STATELESS)
461 mode = dhcpv6_request(DHCPV6_MSG_SOLICIT);
462
463 odhcp6c_signal_process();
464
465 if (mode < 0)
466 continue;
467
468 do {
469 res = dhcpv6_request(mode == DHCPV6_STATELESS ?
470 DHCPV6_MSG_INFO_REQ : DHCPV6_MSG_REQUEST);
471 bool signalled = odhcp6c_signal_process();
472
473 if (res > 0)
474 break;
475 else if (signalled) {
476 mode = -1;
477 break;
478 }
479
480 mode = dhcpv6_promote_server_cand();
481 } while (mode > DHCPV6_UNKNOWN);
482
483 if (mode < 0)
484 continue;
485
486 switch (mode) {
487 case DHCPV6_STATELESS:
488 bound = true;
489 syslog(LOG_NOTICE, "entering stateless-mode on %s", ifname);
490
491 while (!signal_usr2 && !signal_term) {
492 signal_usr1 = false;
493 script_call("informed", script_sync_delay, true);
494
495 res = dhcpv6_poll_reconfigure();
496 odhcp6c_signal_process();
497
498 if (res > 0)
499 continue;
500
501 if (signal_usr1) {
502 signal_usr1 = false; // Acknowledged
503 continue;
504 }
505
506 if (signal_usr2 || signal_term)
507 break;
508
509 res = dhcpv6_request(DHCPV6_MSG_INFO_REQ);
510 odhcp6c_signal_process();
511
512 if (signal_usr1)
513 continue;
514 else if (res < 0)
515 break;
516 }
517 break;
518
519 case DHCPV6_STATEFUL:
520 bound = true;
521 script_call("bound", script_sync_delay, true);
522 syslog(LOG_NOTICE, "entering stateful-mode on %s", ifname);
523
524 while (!signal_usr2 && !signal_term) {
525 // Renew Cycle
526 // Wait for T1 to expire or until we get a reconfigure
527 res = dhcpv6_poll_reconfigure();
528 odhcp6c_signal_process();
529 if (res > 0) {
530 script_call("updated", 0, false);
531 continue;
532 }
533
534 // Handle signal, if necessary
535 if (signal_usr1)
536 signal_usr1 = false; // Acknowledged
537
538 if (signal_usr2 || signal_term)
539 break; // Other signal type
540
541 // Send renew as T1 expired
542 res = dhcpv6_request(DHCPV6_MSG_RENEW);
543 odhcp6c_signal_process();
544
545 if (res > 0) { // Renew was succesfull
546 // Publish updates
547 script_call("updated", 0, false);
548 continue; // Renew was successful
549 }
550
551 odhcp6c_clear_state(STATE_SERVER_ID); // Remove binding
552 odhcp6c_clear_state(STATE_SERVER_ADDR);
553
554 size_t ia_pd_len, ia_na_len;
555 odhcp6c_get_state(STATE_IA_PD, &ia_pd_len);
556 odhcp6c_get_state(STATE_IA_NA, &ia_na_len);
557
558 if (ia_pd_len == 0 && ia_na_len == 0)
559 break;
560
561 // If we have IAs, try rebind otherwise restart
562 res = dhcpv6_request(DHCPV6_MSG_REBIND);
563 odhcp6c_signal_process();
564
565 if (res > 0)
566 script_call("rebound", 0, true);
567 else
568 break;
569 }
570 break;
571
572 default:
573 break;
574 }
575
576 odhcp6c_expire();
577
578 size_t ia_pd_len, ia_na_len, server_id_len;
579 odhcp6c_get_state(STATE_IA_PD, &ia_pd_len);
580 odhcp6c_get_state(STATE_IA_NA, &ia_na_len);
581 odhcp6c_get_state(STATE_SERVER_ID, &server_id_len);
582
583 // Add all prefixes to lost prefixes
584 bound = false;
585 script_call("unbound", 0, true);
586
587 if (server_id_len > 0 && (ia_pd_len > 0 || ia_na_len > 0) && release)
588 dhcpv6_request(DHCPV6_MSG_RELEASE);
589
590 odhcp6c_clear_state(STATE_IA_NA);
591 odhcp6c_clear_state(STATE_IA_PD);
592 }
593
594 script_call("stopped", 0, true);
595
596 return 0;
597 }
598
599 static int usage(void)
600 {
601 const char buf[] =
602 "Usage: odhcp6c [options] <interface>\n"
603 "\nFeature options:\n"
604 " -S <time> Wait at least <time> sec for a DHCP-server (0)\n"
605 " -N <mode> Mode for requesting addresses [try|force|none]\n"
606 " -P <length> Request IPv6-Prefix (0 = auto)\n"
607 " -F Force IPv6-Prefix\n"
608 " -V <class> Set vendor-class option (base-16 encoded)\n"
609 " -u <user-class> Set user-class option string\n"
610 " -x <opt>:<val> Add option opt (with value val) in sent packets (cumulative)\n"
611 " Examples of IPv6 address, string and base-16 encoded options:\n"
612 " -x dns:2001:2001::1,2001:2001::2 - option 23\n"
613 " -x 15:office - option 15 (userclass)\n"
614 " -x 0x1f4:ABBA - option 500\n"
615 " -x 202:'\"file\"' - option 202\n"
616 " -c <clientid> Override client-ID (base-16 encoded 16-bit type + value)\n"
617 " -i <iface-id> Use a custom interface identifier for RA handling\n"
618 " -r <options> Options to be requested (comma-separated)\n"
619 " -R Do not request any options except those specified with -r\n"
620 " -s <script> Status update script (/usr/sbin/odhcp6c-update)\n"
621 " -a Don't send Accept Reconfigure option\n"
622 " -f Don't send Client FQDN option\n"
623 " -k Don't send a RELEASE when stopping\n"
624 " -t <seconds> Maximum timeout for DHCPv6-SOLICIT (120)\n"
625 " -m <seconds> Minimum time between accepting RA updates (3)\n"
626 " -L Ignore default lifetime for RDNSS records\n"
627 " -U Ignore Server Unicast option\n"
628 "\nInvocation options:\n"
629 " -p <pidfile> Set pidfile (/var/run/odhcp6c.pid)\n"
630 " -d Daemonize\n"
631 " -e Write logmessages to stderr\n"
632 " -v Increase logging verbosity\n"
633 " -h Show this help\n\n";
634 fputs(buf, stderr);
635
636 return 1;
637 }
638
639 // Don't want to pull-in librt and libpthread just for a monotonic clock...
640 uint64_t odhcp6c_get_milli_time(void)
641 {
642 struct timespec t;
643
644 clock_gettime(CLOCK_MONOTONIC, &t);
645
646 return ((uint64_t)t.tv_sec) * 1000 + ((uint64_t)t.tv_nsec) / 1000000;
647 }
648
649 static uint8_t* odhcp6c_resize_state(enum odhcp6c_state state, ssize_t len)
650 {
651 if (len == 0)
652 return state_data[state] + state_len[state];
653 else if (state_len[state] + len > 1024)
654 return NULL;
655
656 uint8_t *n = realloc(state_data[state], state_len[state] + len);
657
658 if (n || state_len[state] + len == 0) {
659 state_data[state] = n;
660 n += state_len[state];
661 state_len[state] += len;
662 }
663
664 return n;
665 }
666
667 bool odhcp6c_signal_process(void)
668 {
669 while (signal_io) {
670 signal_io = false;
671
672 bool ra_updated = ra_process();
673
674 if (ra_link_up()) {
675 signal_usr2 = true;
676 ra = false;
677 }
678
679 if (ra_updated && (bound || allow_slaac_only >= 0)) {
680 script_call("ra-updated", (!ra && !bound) ?
681 script_sync_delay : script_accu_delay, false);
682 ra = true;
683 }
684 }
685
686 return signal_usr1 || signal_usr2 || signal_term;
687 }
688
689 void odhcp6c_clear_state(enum odhcp6c_state state)
690 {
691 state_len[state] = 0;
692 }
693
694 int odhcp6c_add_state(enum odhcp6c_state state, const void *data, size_t len)
695 {
696 uint8_t *n = odhcp6c_resize_state(state, len);
697
698 if (!n)
699 return -1;
700
701 memcpy(n, data, len);
702
703 return 0;
704 }
705
706 int odhcp6c_insert_state(enum odhcp6c_state state, size_t offset, const void *data, size_t len)
707 {
708 ssize_t len_after = state_len[state] - offset;
709 if (len_after < 0)
710 return -1;
711
712 uint8_t *n = odhcp6c_resize_state(state, len);
713
714 if (n) {
715 uint8_t *sdata = state_data[state];
716
717 memmove(sdata + offset + len, sdata + offset, len_after);
718 memcpy(sdata + offset, data, len);
719 }
720
721 return 0;
722 }
723
724 size_t odhcp6c_remove_state(enum odhcp6c_state state, size_t offset, size_t len)
725 {
726 uint8_t *data = state_data[state];
727 ssize_t len_after = state_len[state] - (offset + len);
728
729 if (len_after < 0)
730 return state_len[state];
731
732 memmove(data + offset, data + offset + len, len_after);
733
734 return state_len[state] -= len;
735 }
736
737 void* odhcp6c_move_state(enum odhcp6c_state state, size_t *len)
738 {
739 *len = state_len[state];
740 void *data = state_data[state];
741
742 state_len[state] = 0;
743 state_data[state] = NULL;
744
745 return data;
746 }
747
748 void* odhcp6c_get_state(enum odhcp6c_state state, size_t *len)
749 {
750 *len = state_len[state];
751
752 return state_data[state];
753 }
754
755 static struct odhcp6c_entry* odhcp6c_find_entry(enum odhcp6c_state state, const struct odhcp6c_entry *new)
756 {
757 size_t len, cmplen = offsetof(struct odhcp6c_entry, target) + ((new->length + 7) / 8);
758 uint8_t *start = odhcp6c_get_state(state, &len);
759
760 for (struct odhcp6c_entry *c = (struct odhcp6c_entry*)start;
761 (uint8_t*)c < &start[len] &&
762 (uint8_t*)odhcp6c_next_entry(c) <= &start[len];
763 c = odhcp6c_next_entry(c)) {
764 if (!memcmp(c, new, cmplen) && !memcmp(c->auxtarget, new->auxtarget, new->auxlen))
765 return c;
766 }
767
768 return NULL;
769 }
770
771 bool odhcp6c_update_entry(enum odhcp6c_state state, struct odhcp6c_entry *new,
772 uint32_t safe, unsigned int holdoff_interval)
773 {
774 size_t len;
775 struct odhcp6c_entry *x = odhcp6c_find_entry(state, new);
776 uint8_t *start = odhcp6c_get_state(state, &len);
777
778 if (x && x->valid > new->valid && new->valid < safe)
779 new->valid = safe;
780
781 if (new->valid > 0) {
782 if (x) {
783 if (holdoff_interval && new->valid >= x->valid &&
784 new->valid != UINT32_MAX &&
785 new->valid - x->valid < holdoff_interval &&
786 new->preferred >= x->preferred &&
787 new->preferred != UINT32_MAX &&
788 new->preferred - x->preferred < holdoff_interval)
789 return false;
790
791 x->valid = new->valid;
792 x->preferred = new->preferred;
793 x->t1 = new->t1;
794 x->t2 = new->t2;
795 x->iaid = new->iaid;
796 } else if (odhcp6c_add_state(state, new, odhcp6c_entry_size(new)))
797 return false;
798 } else if (x)
799 odhcp6c_remove_state(state, ((uint8_t*)x) - start, odhcp6c_entry_size(x));
800
801 return true;
802 }
803
804 static void odhcp6c_expire_list(enum odhcp6c_state state, uint32_t elapsed)
805 {
806 size_t len;
807 uint8_t *start = odhcp6c_get_state(state, &len);
808
809 for (struct odhcp6c_entry *c = (struct odhcp6c_entry*)start;
810 (uint8_t*)c < &start[len] &&
811 (uint8_t*)odhcp6c_next_entry(c) <= &start[len];
812 ) {
813 if (c->t1 < elapsed)
814 c->t1 = 0;
815 else if (c->t1 != UINT32_MAX)
816 c->t1 -= elapsed;
817
818 if (c->t2 < elapsed)
819 c->t2 = 0;
820 else if (c->t2 != UINT32_MAX)
821 c->t2 -= elapsed;
822
823 if (c->preferred < elapsed)
824 c->preferred = 0;
825 else if (c->preferred != UINT32_MAX)
826 c->preferred -= elapsed;
827
828 if (c->valid < elapsed)
829 c->valid = 0;
830 else if (c->valid != UINT32_MAX)
831 c->valid -= elapsed;
832
833 if (!c->valid) {
834 odhcp6c_remove_state(state, ((uint8_t*)c) - start, odhcp6c_entry_size(c));
835 start = odhcp6c_get_state(state, &len);
836 } else
837 c = odhcp6c_next_entry(c);
838 }
839 }
840
841 static uint8_t *odhcp6c_state_find_opt(const uint16_t code)
842 {
843 size_t opts_len;
844 uint8_t *odata, *opts = odhcp6c_get_state(STATE_OPTS, &opts_len);
845 uint16_t otype, olen;
846
847 dhcpv6_for_each_option(opts, &opts[opts_len], otype, olen, odata) {
848 if (otype == code)
849 return &odata[-4];
850 }
851
852 return NULL;
853 }
854
855 void odhcp6c_expire(void)
856 {
857 time_t now = odhcp6c_get_milli_time() / 1000;
858 uint32_t elapsed = (last_update > 0) ? now - last_update : 0;
859
860 last_update = now;
861
862 odhcp6c_expire_list(STATE_RA_PREFIX, elapsed);
863 odhcp6c_expire_list(STATE_RA_ROUTE, elapsed);
864 odhcp6c_expire_list(STATE_RA_DNS, elapsed);
865 odhcp6c_expire_list(STATE_RA_SEARCH, elapsed);
866 odhcp6c_expire_list(STATE_IA_NA, elapsed);
867 odhcp6c_expire_list(STATE_IA_PD, elapsed);
868 }
869
870 uint32_t odhcp6c_elapsed(void)
871 {
872 return odhcp6c_get_milli_time() / 1000 - last_update;
873 }
874
875 int odhcp6c_random(void *buf, size_t len)
876 {
877 return read(urandom_fd, buf, len);
878 }
879
880 bool odhcp6c_is_bound(void)
881 {
882 return bound;
883 }
884
885 bool odhcp6c_addr_in_scope(const struct in6_addr *addr)
886 {
887 FILE *fd = fopen("/proc/net/if_inet6", "r");
888 int len;
889 bool ret = false;
890 char buf[256];
891
892 if (fd == NULL)
893 return false;
894
895 while (fgets(buf, sizeof(buf), fd)) {
896 struct in6_addr inet6_addr;
897 uint32_t flags, dummy;
898 unsigned int i;
899 char name[IF_NAMESIZE], addr_buf[33];
900
901 len = strlen(buf);
902
903 if ((len <= 0) || buf[len - 1] != '\n')
904 break;
905
906 buf[--len] = '\0';
907
908 if (sscanf(buf, "%s %x %x %x %x %s",
909 addr_buf, &dummy, &dummy, &dummy, &flags, name) != 6)
910 break;
911
912 if (strcmp(name, ifname) ||
913 (flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE | IFA_F_DEPRECATED)))
914 continue;
915
916 for (i = 0; i < strlen(addr_buf); i++) {
917 if (!isxdigit(addr_buf[i]) || isupper(addr_buf[i]))
918 break;
919 }
920
921 memset(&inet6_addr, 0, sizeof(inet6_addr));
922 for (i = 0; i < (strlen(addr_buf) / 2); i++) {
923 unsigned char byte;
924 static const char hex[] = "0123456789abcdef";
925 byte = ((index(hex, addr_buf[i * 2]) - hex) << 4) |
926 (index(hex, addr_buf[i * 2 + 1]) - hex);
927 inet6_addr.s6_addr[i] = byte;
928 }
929
930 if ((IN6_IS_ADDR_LINKLOCAL(&inet6_addr) == IN6_IS_ADDR_LINKLOCAL(addr)) &&
931 (IN6_IS_ADDR_UNIQUELOCAL(&inet6_addr) == IN6_IS_ADDR_UNIQUELOCAL(addr))) {
932 ret = true;
933 break;
934 }
935 }
936
937 fclose(fd);
938 return ret;
939 }
940
941 static void sighandler(int signal)
942 {
943 if (signal == SIGUSR1)
944 signal_usr1 = true;
945 else if (signal == SIGUSR2)
946 signal_usr2 = true;
947 else if (signal == SIGIO)
948 signal_io = true;
949 else
950 signal_term = true;
951 }
952
953 static int add_opt(const uint16_t code, const uint8_t *data, const uint16_t len)
954 {
955 struct {
956 uint16_t code;
957 uint16_t len;
958 } opt_hdr = { htons(code), htons(len) };
959
960 if (odhcp6c_state_find_opt(code))
961 return -1;
962
963 if (odhcp6c_add_state(STATE_OPTS, &opt_hdr, sizeof(opt_hdr)) ||
964 odhcp6c_add_state(STATE_OPTS, data, len)) {
965 syslog(LOG_ERR, "Failed to add option %hu", code);
966 return 1;
967 }
968
969 return 0;
970 }
971
972 struct odhcp6c_opt *odhcp6c_find_opt(const uint16_t code)
973 {
974 struct odhcp6c_opt *opt = opts;
975
976 while (opt->code) {
977 if (opt->code == code)
978 return opt;
979
980 opt++;
981 }
982
983 return NULL;
984 }
985
986 static struct odhcp6c_opt *odhcp6c_find_opt_by_name(const char *name)
987 {
988 struct odhcp6c_opt *opt = opts;
989
990 if (!name || !strlen(name))
991 return NULL;
992
993 while (opt->code && (!opt->str || strcmp(opt->str, name)))
994 opt++;
995
996 return (opt->code > 0 ? opt : NULL);
997 }
998
999 /* Find first occurrence of any character in the string <needles>
1000 * within the string <haystack>
1001 * */
1002 static char *get_sep_pos(const char *haystack, const char *needles)
1003 {
1004 unsigned int i;
1005 char *first = NULL;
1006
1007 for (i = 0; i < strlen(needles); i++) {
1008 char *found = strchr(haystack, needles[i]);
1009 if (found && ((found < first) || (first == NULL)))
1010 first = found;
1011 }
1012
1013 return first;
1014 }
1015
1016 static int parse_opt_u8(const char *src, uint8_t **dst)
1017 {
1018 int len = strlen(src);
1019
1020 *dst = realloc(*dst, len/2);
1021 if (!*dst)
1022 return -1;
1023
1024 return script_unhexlify(*dst, len, src);
1025 }
1026
1027 static int parse_opt_string(const char *src, uint8_t **dst, const bool array)
1028 {
1029 int o_len = 0;
1030 char *sep = get_sep_pos(src, ARRAY_SEP);
1031
1032 if (sep && !array)
1033 return -1;
1034
1035 do {
1036 if (sep) {
1037 *sep = 0;
1038 sep++;
1039 }
1040
1041 int len = strlen(src);
1042
1043 *dst = realloc(*dst, o_len + len);
1044 if (!*dst)
1045 return -1;
1046
1047 memcpy(&((*dst)[o_len]), src, len);
1048
1049 o_len += len;
1050 src = sep;
1051
1052 if (sep)
1053 sep = get_sep_pos(src, ARRAY_SEP);
1054 } while (src);
1055
1056 return o_len;
1057 }
1058
1059 static int parse_opt_dns_string(const char *src, uint8_t **dst, const bool array)
1060 {
1061 int o_len = 0;
1062 char *sep = get_sep_pos(src, ARRAY_SEP);
1063
1064 if (sep && !array)
1065 return -1;
1066
1067 do {
1068 uint8_t tmp[256];
1069
1070 if (sep) {
1071 *sep = 0;
1072 sep++;
1073 }
1074
1075 int len = dn_comp(src, tmp, sizeof(tmp), NULL, NULL);
1076 if (len < 0)
1077 return -1;
1078
1079 *dst = realloc(*dst, o_len + len);
1080 if (!*dst)
1081 return -1;
1082
1083 memcpy(&((*dst)[o_len]), tmp, len);
1084
1085 o_len += len;
1086 src = sep;
1087
1088 if (sep)
1089 sep = get_sep_pos(src, ARRAY_SEP);
1090 } while (src);
1091
1092 return o_len;
1093 }
1094
1095 static int parse_opt_ip6(const char *src, uint8_t **dst, const bool array)
1096 {
1097 int o_len = 0;
1098 char *sep = get_sep_pos(src, ARRAY_SEP);
1099
1100 if (sep && !array)
1101 return -1;
1102
1103 do {
1104 int len = sizeof(struct in6_addr);
1105
1106 if (sep) {
1107 *sep = 0;
1108 sep++;
1109 }
1110
1111 *dst = realloc(*dst, o_len + len);
1112 if (!*dst)
1113 return -1;
1114
1115 if (inet_pton(AF_INET6, src, &((*dst)[o_len])) < 1)
1116 return -1;
1117
1118 o_len += len;
1119 src = sep;
1120
1121 if (sep)
1122 sep = get_sep_pos(src, ARRAY_SEP);
1123 } while (src);
1124
1125 return o_len;
1126 }
1127
1128 static int parse_opt_user_class(const char *src, uint8_t **dst, const bool array)
1129 {
1130 int o_len = 0;
1131 char *sep = get_sep_pos(src, ARRAY_SEP);
1132
1133 if (sep && !array)
1134 return -1;
1135
1136 do {
1137 if (sep) {
1138 *sep = 0;
1139 sep++;
1140 }
1141 uint16_t str_len = strlen(src);
1142
1143 *dst = realloc(*dst, o_len + str_len + 2);
1144 if (!*dst)
1145 return -1;
1146
1147 struct user_class {
1148 uint16_t len;
1149 uint8_t data[];
1150 } *e = (struct user_class *)&((*dst)[o_len]);
1151
1152 e->len = ntohs(str_len);
1153 memcpy(e->data, src, str_len);
1154
1155 o_len += str_len + 2;
1156 src = sep;
1157
1158 if (sep)
1159 sep = get_sep_pos(src, ARRAY_SEP);
1160 } while (src);
1161
1162 return o_len;
1163 }
1164
1165 static int parse_opt_data(const char *data, uint8_t **dst, const unsigned int type,
1166 const bool array)
1167 {
1168 int ret = 0;
1169
1170 switch (type) {
1171 case OPT_U8:
1172 ret = parse_opt_u8(data, dst);
1173 break;
1174
1175 case OPT_STR:
1176 ret = parse_opt_string(data, dst, array);
1177 break;
1178
1179 case OPT_DNS_STR:
1180 ret = parse_opt_dns_string(data, dst, array);
1181 break;
1182
1183 case OPT_IP6:
1184 ret = parse_opt_ip6(data, dst, array);
1185 break;
1186
1187 case OPT_USER_CLASS:
1188 ret = parse_opt_user_class(data, dst, array);
1189 break;
1190
1191 default:
1192 ret = -1;
1193 break;
1194 }
1195
1196 return ret;
1197 }
1198
1199 static int parse_opt(const char *opt)
1200 {
1201 uint32_t optn;
1202 char *data;
1203 uint8_t *payload = NULL;
1204 int payload_len;
1205 unsigned int type = OPT_U8;
1206 bool array = false;
1207 struct odhcp6c_opt *dopt = NULL;
1208 int ret = -1;
1209
1210 data = get_sep_pos(opt, ":");
1211 if (!data)
1212 return -1;
1213
1214 *data = '\0';
1215 data++;
1216
1217 if (strlen(opt) == 0 || strlen(data) == 0)
1218 return -1;
1219
1220 dopt = odhcp6c_find_opt_by_name(opt);
1221 if (!dopt) {
1222 char *e;
1223 optn = strtoul(opt, &e, 0);
1224 if (*e || e == opt || optn > USHRT_MAX)
1225 return -1;
1226
1227 dopt = odhcp6c_find_opt(optn);
1228 } else
1229 optn = dopt->code;
1230
1231 /* Check if the type for the content is well-known */
1232 if (dopt) {
1233 /* Refuse internal options */
1234 if (dopt->flags & OPT_INTERNAL)
1235 return -1;
1236
1237 type = dopt->flags & OPT_MASK_SIZE;
1238 array = ((dopt->flags & OPT_ARRAY) == OPT_ARRAY) ? true : false;
1239 } else if (data[0] == '"' || data[0] == '\'') {
1240 char *end = strrchr(data + 1, data[0]);
1241
1242 if (end && (end == (data + strlen(data) - 1))) {
1243 /* Raw option is specified as a string */
1244 type = OPT_STR;
1245 data++;
1246 *end = '\0';
1247 }
1248
1249 }
1250
1251 payload_len = parse_opt_data(data, &payload, type, array);
1252 if (payload_len > 0)
1253 ret = add_opt(optn, payload, payload_len);
1254
1255 free(payload);
1256
1257 return ret;
1258 }
Openwrt DHCPv6 Client