Commit | Line | Data |
---|---|---|
b2a56f7c SE |
1 | /* |
2 | * util.c | |
3 | * - output and logging support | |
4 | * - program lifetime support | |
5 | * - IP address and subnet munging routines | |
6 | * - MPI convenience functions | |
7 | */ | |
8 | /* | |
9 | * This file is | |
10 | * Copyright (C) 1995--2001 Stephen Early <steve@greenend.org.uk> | |
2fe58dfd | 11 | * |
b2a56f7c SE |
12 | * It is part of secnet, which is |
13 | * Copyright (C) 1995--2001 Stephen Early <steve@greenend.org.uk> | |
14 | * Copyright (C) 1998 Ross Anderson, Eli Biham, Lars Knudsen | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2, or (at your option) | |
19 | * any later version. | |
20 | * | |
21 | * This program is distributed in the hope that it will be useful, | |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
25 | * | |
26 | * You should have received a copy of the GNU General Public License | |
27 | * along with this program; if not, write to the Free Software Foundation, | |
28 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
2fe58dfd SE |
29 | */ |
30 | ||
8689b3a9 | 31 | #include "secnet.h" |
2fe58dfd | 32 | #include <stdio.h> |
2fe58dfd SE |
33 | #include <string.h> |
34 | #include <errno.h> | |
2fe58dfd | 35 | #include <unistd.h> |
59635212 | 36 | #include <limits.h> |
2fe58dfd | 37 | #include <assert.h> |
4efd681a | 38 | #include <sys/wait.h> |
61dbc9e0 | 39 | #include <adns.h> |
2fe58dfd | 40 | #include "util.h" |
59635212 | 41 | #include "unaligned.h" |
8534d602 | 42 | #include "magic.h" |
bb839899 | 43 | #include "ipaddr.h" |
2fe58dfd SE |
44 | |
45 | #define MIN_BUFFER_SIZE 64 | |
46 | #define DEFAULT_BUFFER_SIZE 4096 | |
47 | #define MAX_BUFFER_SIZE 131072 | |
48 | ||
fe5e9cc4 | 49 | static const char *hexdigits="0123456789abcdef"; |
2fe58dfd | 50 | |
7138d0c5 | 51 | uint32_t current_phase=0; |
2fe58dfd SE |
52 | |
53 | struct phase_hook { | |
54 | hook_fn *fn; | |
55 | void *state; | |
56 | struct phase_hook *next; | |
57 | }; | |
58 | ||
59 | static struct phase_hook *hooks[NR_PHASES]={NULL,}; | |
60 | ||
fe5e9cc4 | 61 | char *safe_strdup(const char *s, const char *message) |
2fe58dfd SE |
62 | { |
63 | char *d; | |
64 | d=strdup(s); | |
65 | if (!d) { | |
779837e1 | 66 | fatal_perror("%s",message); |
2fe58dfd SE |
67 | } |
68 | return d; | |
69 | } | |
70 | ||
fe5e9cc4 | 71 | void *safe_malloc(size_t size, const char *message) |
2fe58dfd SE |
72 | { |
73 | void *r; | |
6f146b5d IJ |
74 | if (!size) |
75 | return 0; | |
2fe58dfd SE |
76 | r=malloc(size); |
77 | if (!r) { | |
779837e1 | 78 | fatal_perror("%s",message); |
2fe58dfd SE |
79 | } |
80 | return r; | |
81 | } | |
6f146b5d IJ |
82 | void *safe_realloc_ary(void *p, size_t size, size_t count, |
83 | const char *message) { | |
bb9d0561 IJ |
84 | if (count >= INT_MAX/size) { |
85 | fatal("array allocation overflow: %s", message); | |
86 | } | |
6f146b5d IJ |
87 | assert(size && count); |
88 | p = realloc(p, size*count); | |
89 | if (!p) | |
90 | fatal_perror("%s", message); | |
91 | return p; | |
92 | } | |
93 | ||
94 | void *safe_malloc_ary(size_t size, size_t count, const char *message) { | |
95 | if (!size || !count) | |
96 | return 0; | |
97 | return safe_realloc_ary(0,size,count,message); | |
bb9d0561 | 98 | } |
2fe58dfd SE |
99 | |
100 | /* Convert a buffer into its MP_INT representation */ | |
101 | void read_mpbin(MP_INT *a, uint8_t *bin, int binsize) | |
102 | { | |
103 | char *buff; | |
104 | int i; | |
105 | ||
106 | buff=safe_malloc(binsize*2 + 1,"read_mpbin"); | |
107 | ||
108 | for (i=0; i<binsize; i++) { | |
109 | buff[i*2]=hexdigits[(bin[i] & 0xf0) >> 4]; | |
110 | buff[i*2+1]=hexdigits[(bin[i] & 0xf)]; | |
111 | } | |
112 | buff[binsize*2]=0; | |
113 | ||
114 | mpz_set_str(a, buff, 16); | |
115 | free(buff); | |
116 | } | |
117 | ||
118 | /* Convert a MP_INT into a hex string */ | |
119 | char *write_mpstring(MP_INT *a) | |
120 | { | |
121 | char *buff; | |
122 | ||
123 | buff=safe_malloc(mpz_sizeinbase(a,16)+2,"write_mpstring"); | |
124 | mpz_get_str(buff, 16, a); | |
125 | return buff; | |
126 | } | |
127 | ||
128 | static uint8_t hexval(uint8_t c) | |
129 | { | |
130 | switch (c) { | |
131 | case '0': return 0; | |
132 | case '1': return 1; | |
133 | case '2': return 2; | |
134 | case '3': return 3; | |
135 | case '4': return 4; | |
136 | case '5': return 5; | |
137 | case '6': return 6; | |
138 | case '7': return 7; | |
139 | case '8': return 8; | |
140 | case '9': return 9; | |
141 | case 'a': return 10; | |
142 | case 'A': return 10; | |
143 | case 'b': return 11; | |
144 | case 'B': return 11; | |
145 | case 'c': return 12; | |
146 | case 'C': return 12; | |
147 | case 'd': return 13; | |
148 | case 'D': return 13; | |
149 | case 'e': return 14; | |
150 | case 'E': return 14; | |
151 | case 'f': return 15; | |
152 | case 'F': return 15; | |
153 | } | |
154 | return -1; | |
155 | } | |
156 | ||
157 | /* Convert a MP_INT into a buffer; return length; truncate if necessary */ | |
1caa23ff | 158 | int32_t write_mpbin(MP_INT *a, uint8_t *buffer, int32_t buflen) |
2fe58dfd SE |
159 | { |
160 | char *hb; | |
161 | int i,j,l; | |
162 | ||
163 | if (buflen==0) return 0; | |
164 | hb=write_mpstring(a); | |
165 | ||
166 | l=strlen(hb); | |
167 | i=0; j=0; | |
168 | if (l&1) { | |
169 | /* The number starts with a half-byte */ | |
170 | buffer[i++]=hexval(hb[j++]); | |
171 | } | |
172 | for (; hb[j] && i<buflen; i++) { | |
173 | buffer[i]=(hexval(hb[j])<<4)|hexval(hb[j+1]); | |
174 | j+=2; | |
175 | } | |
176 | free(hb); | |
177 | return i; | |
178 | } | |
179 | ||
4fb0f88d IJ |
180 | void setcloexec(int fd) { |
181 | int r=fcntl(fd, F_GETFD); | |
182 | if (r<0) fatal_perror("fcntl(,F_GETFD) failed"); | |
183 | r=fcntl(fd, F_SETFD, r|FD_CLOEXEC); | |
184 | if (r<0) fatal_perror("fcntl(,F_SETFD,|FD_CLOEXEC) failed"); | |
185 | } | |
186 | ||
6a06198c IJ |
187 | void pipe_cloexec(int fd[2]) { |
188 | int r=pipe(fd); | |
189 | if (r) fatal_perror("pipe"); | |
190 | setcloexec(fd[0]); | |
191 | setcloexec(fd[1]); | |
192 | } | |
193 | ||
fe5e9cc4 | 194 | static const char *phases[NR_PHASES]={ |
2fe58dfd SE |
195 | "PHASE_INIT", |
196 | "PHASE_GETOPTS", | |
197 | "PHASE_READCONFIG", | |
198 | "PHASE_SETUP", | |
7b1a9fb7 | 199 | "PHASE_DAEMONIZE", |
baa06aeb | 200 | "PHASE_GETRESOURCES", |
2fe58dfd SE |
201 | "PHASE_DROPPRIV", |
202 | "PHASE_RUN", | |
203 | "PHASE_SHUTDOWN" | |
204 | }; | |
205 | ||
206 | void enter_phase(uint32_t new_phase) | |
207 | { | |
208 | struct phase_hook *i; | |
209 | ||
baa06aeb SE |
210 | if (hooks[new_phase]) |
211 | Message(M_DEBUG_PHASE,"Running hooks for %s...\n", phases[new_phase]); | |
2fe58dfd SE |
212 | current_phase=new_phase; |
213 | ||
214 | for (i=hooks[new_phase]; i; i=i->next) | |
215 | i->fn(i->state, new_phase); | |
baa06aeb | 216 | Message(M_DEBUG_PHASE,"Now in %s\n",phases[new_phase]); |
2fe58dfd SE |
217 | } |
218 | ||
219 | bool_t add_hook(uint32_t phase, hook_fn *fn, void *state) | |
220 | { | |
221 | struct phase_hook *h; | |
222 | ||
223 | h=safe_malloc(sizeof(*h),"add_hook"); | |
224 | h->fn=fn; | |
225 | h->state=state; | |
226 | h->next=hooks[phase]; | |
227 | hooks[phase]=h; | |
228 | return True; | |
229 | } | |
230 | ||
231 | bool_t remove_hook(uint32_t phase, hook_fn *fn, void *state) | |
232 | { | |
4f5e39ec | 233 | fatal("remove_hook: not implemented"); |
2fe58dfd SE |
234 | |
235 | return False; | |
236 | } | |
237 | ||
59938e0e IJ |
238 | void vslilog(struct log_if *lf, int priority, const char *message, va_list ap) |
239 | { | |
779837e1 | 240 | lf->vlogfn(lf->st,priority,message,ap); |
59938e0e IJ |
241 | } |
242 | ||
040ee979 | 243 | void slilog(struct log_if *lf, int priority, const char *message, ...) |
2fe58dfd SE |
244 | { |
245 | va_list ap; | |
246 | ||
247 | va_start(ap,message); | |
59938e0e | 248 | vslilog(lf,priority,message,ap); |
2fe58dfd SE |
249 | va_end(ap); |
250 | } | |
251 | ||
252 | struct buffer { | |
253 | closure_t cl; | |
254 | struct buffer_if ops; | |
255 | }; | |
256 | ||
fe5e9cc4 | 257 | void buffer_assert_free(struct buffer_if *buffer, cstring_t file, |
1caa23ff | 258 | int line) |
2fe58dfd SE |
259 | { |
260 | if (!buffer->free) { | |
28db900b IJ |
261 | fprintf(stderr,"secnet: BUF_ASSERT_FREE, %s line %d, owned by %s", |
262 | file,line,buffer->owner); | |
263 | assert(!"buffer_assert_free failure"); | |
2fe58dfd SE |
264 | } |
265 | } | |
266 | ||
fe5e9cc4 | 267 | void buffer_assert_used(struct buffer_if *buffer, cstring_t file, |
1caa23ff | 268 | int line) |
2fe58dfd SE |
269 | { |
270 | if (buffer->free) { | |
28db900b IJ |
271 | fprintf(stderr,"secnet: BUF_ASSERT_USED, %s line %d, last owned by %s", |
272 | file,line,buffer->owner); | |
273 | assert(!"buffer_assert_used failure"); | |
2fe58dfd SE |
274 | } |
275 | } | |
276 | ||
1caa23ff | 277 | void buffer_init(struct buffer_if *buffer, int32_t max_start_pad) |
2fe58dfd | 278 | { |
10068344 | 279 | assert(max_start_pad<=buffer->alloclen); |
2fe58dfd SE |
280 | buffer->start=buffer->base+max_start_pad; |
281 | buffer->size=0; | |
282 | } | |
283 | ||
1caa23ff | 284 | void *buf_append(struct buffer_if *buf, int32_t amount) { |
2fe58dfd | 285 | void *p; |
92795040 | 286 | assert(amount <= buf_remaining_space(buf)); |
2fe58dfd SE |
287 | p=buf->start + buf->size; |
288 | buf->size+=amount; | |
289 | return p; | |
290 | } | |
291 | ||
1caa23ff | 292 | void *buf_prepend(struct buffer_if *buf, int32_t amount) { |
59230b9b | 293 | assert(amount <= buf->start - buf->base); |
2fe58dfd SE |
294 | buf->size+=amount; |
295 | return buf->start-=amount; | |
296 | } | |
297 | ||
1caa23ff | 298 | void *buf_unappend(struct buffer_if *buf, int32_t amount) { |
2fe58dfd SE |
299 | if (buf->size < amount) return 0; |
300 | return buf->start+(buf->size-=amount); | |
301 | } | |
302 | ||
1caa23ff | 303 | void *buf_unprepend(struct buffer_if *buf, int32_t amount) { |
2fe58dfd | 304 | void *p; |
20138876 | 305 | if (buf->size < amount) return 0; |
2fe58dfd SE |
306 | p=buf->start; |
307 | buf->start+=amount; | |
308 | buf->size-=amount; | |
309 | return p; | |
310 | } | |
311 | ||
312 | /* Append a two-byte length and the string to the buffer. Length is in | |
313 | network byte order. */ | |
fe5e9cc4 | 314 | void buf_append_string(struct buffer_if *buf, cstring_t s) |
2fe58dfd | 315 | { |
1caa23ff | 316 | size_t len; |
2fe58dfd SE |
317 | |
318 | len=strlen(s); | |
59230b9b | 319 | /* fixme: if string is longer than 65535, result is a corrupted packet */ |
59635212 | 320 | buf_append_uint16(buf,len); |
4f28e77e | 321 | BUF_ADD_BYTES(append,buf,s,len); |
2fe58dfd SE |
322 | } |
323 | ||
1caa23ff | 324 | void buffer_new(struct buffer_if *buf, int32_t len) |
2fe58dfd SE |
325 | { |
326 | buf->free=True; | |
327 | buf->owner=NULL; | |
328 | buf->flags=0; | |
329 | buf->loc.file=NULL; | |
330 | buf->loc.line=0; | |
331 | buf->size=0; | |
10068344 | 332 | buf->alloclen=len; |
2fe58dfd SE |
333 | buf->start=NULL; |
334 | buf->base=safe_malloc(len,"buffer_new"); | |
335 | } | |
336 | ||
28db900b IJ |
337 | void buffer_readonly_view(struct buffer_if *buf, const void *data, int32_t len) |
338 | { | |
339 | buf->free=False; | |
340 | buf->owner="READONLY"; | |
341 | buf->flags=0; | |
342 | buf->loc.file=NULL; | |
343 | buf->loc.line=0; | |
10068344 | 344 | buf->size=buf->alloclen=len; |
28db900b IJ |
345 | buf->base=buf->start=(uint8_t*)data; |
346 | } | |
347 | ||
348 | void buffer_readonly_clone(struct buffer_if *out, const struct buffer_if *in) | |
349 | { | |
350 | buffer_readonly_view(out,in->start,in->size); | |
351 | } | |
352 | ||
05f39b4d IJ |
353 | void buffer_copy(struct buffer_if *dst, const struct buffer_if *src) |
354 | { | |
10068344 IJ |
355 | if (dst->alloclen < src->alloclen) { |
356 | dst->base=realloc(dst->base,src->alloclen); | |
05f39b4d | 357 | if (!dst->base) fatal_perror("buffer_copy"); |
10068344 | 358 | dst->alloclen = src->alloclen; |
05f39b4d IJ |
359 | } |
360 | dst->start = dst->base + (src->start - src->base); | |
361 | dst->size = src->size; | |
362 | memcpy(dst->start, src->start, dst->size); | |
363 | } | |
364 | ||
2fe58dfd SE |
365 | static list_t *buffer_apply(closure_t *self, struct cloc loc, dict_t *context, |
366 | list_t *args) | |
367 | { | |
368 | struct buffer *st; | |
369 | item_t *item; | |
370 | dict_t *dict; | |
371 | bool_t lockdown=False; | |
4efd681a | 372 | uint32_t len=DEFAULT_BUFFER_SIZE; |
2fe58dfd SE |
373 | |
374 | st=safe_malloc(sizeof(*st),"buffer_apply"); | |
375 | st->cl.description="buffer"; | |
376 | st->cl.type=CL_BUFFER; | |
377 | st->cl.apply=NULL; | |
378 | st->cl.interface=&st->ops; | |
2fe58dfd SE |
379 | |
380 | /* First argument, if present, is buffer length */ | |
381 | item=list_elem(args,0); | |
382 | if (item) { | |
383 | if (item->type!=t_number) { | |
384 | cfgfatal(st->ops.loc,"buffer","first parameter must be a " | |
385 | "number (buffer size)\n"); | |
386 | } | |
4efd681a SE |
387 | len=item->data.number; |
388 | if (len<MIN_BUFFER_SIZE) { | |
2fe58dfd SE |
389 | cfgfatal(st->ops.loc,"buffer","ludicrously small buffer size\n"); |
390 | } | |
4efd681a | 391 | if (len>MAX_BUFFER_SIZE) { |
2fe58dfd SE |
392 | cfgfatal(st->ops.loc,"buffer","ludicrously large buffer size\n"); |
393 | } | |
394 | } | |
395 | /* Second argument, if present, is a dictionary */ | |
396 | item=list_elem(args,1); | |
397 | if (item) { | |
398 | if (item->type!=t_dict) { | |
399 | cfgfatal(st->ops.loc,"buffer","second parameter must be a " | |
400 | "dictionary\n"); | |
401 | } | |
402 | dict=item->data.dict; | |
403 | lockdown=dict_read_bool(dict,"lockdown",False,"buffer",st->ops.loc, | |
404 | False); | |
405 | } | |
406 | ||
4efd681a | 407 | buffer_new(&st->ops,len); |
2fe58dfd | 408 | if (lockdown) { |
70dc107b | 409 | /* XXX mlock the buffer if possible */ |
2fe58dfd SE |
410 | } |
411 | ||
412 | return new_closure(&st->cl); | |
413 | } | |
414 | ||
8534d602 IJ |
415 | void send_nak(const struct comm_addr *dest, uint32_t our_index, |
416 | uint32_t their_index, uint32_t msgtype, | |
417 | struct buffer_if *buf, const char *logwhy) | |
418 | { | |
3abd18e8 | 419 | buffer_init(buf,calculate_max_start_pad()); |
8534d602 IJ |
420 | buf_append_uint32(buf,their_index); |
421 | buf_append_uint32(buf,our_index); | |
422 | buf_append_uint32(buf,LABEL_NAK); | |
423 | if (logwhy) | |
424 | Message(M_INFO,"%s: %08"PRIx32"<-%08"PRIx32": %08"PRIx32":" | |
425 | " %s; sending NAK\n", | |
1a448682 | 426 | comm_addr_to_string(dest), |
8534d602 IJ |
427 | our_index, their_index, msgtype, logwhy); |
428 | dest->comm->sendmsg(dest->comm->st, buf, dest); | |
429 | } | |
430 | ||
5ad34db2 IJ |
431 | int consttime_memeq(const void *s1in, const void *s2in, size_t n) |
432 | { | |
433 | const uint8_t *s1=s1in, *s2=s2in; | |
434 | register volatile uint8_t accumulator=0; | |
435 | ||
436 | while (n-- > 0) { | |
437 | accumulator |= (*s1++ ^ *s2++); | |
438 | } | |
439 | accumulator |= accumulator >> 4; /* constant-time */ | |
440 | accumulator |= accumulator >> 2; /* boolean canonicalisation */ | |
441 | accumulator |= accumulator >> 1; | |
442 | accumulator &= 1; | |
443 | accumulator ^= 1; | |
444 | return accumulator; | |
445 | } | |
446 | ||
2fe58dfd SE |
447 | void util_module(dict_t *dict) |
448 | { | |
2fe58dfd SE |
449 | add_closure(dict,"sysbuffer",buffer_apply); |
450 | } | |
3abd18e8 IJ |
451 | |
452 | void update_max_start_pad(int32_t *our_module_global, int32_t our_instance) | |
453 | { | |
454 | if (*our_module_global < our_instance) | |
455 | *our_module_global=our_instance; | |
456 | } | |
457 | ||
458 | int32_t transform_max_start_pad, comm_max_start_pad; | |
459 | ||
460 | int32_t calculate_max_start_pad(void) | |
461 | { | |
462 | return | |
463 | site_max_start_pad + | |
464 | transform_max_start_pad + | |
465 | comm_max_start_pad; | |
466 | } | |
ff1dcd86 IJ |
467 | |
468 | void vslilog_part(struct log_if *lf, int priority, const char *message, va_list ap) | |
469 | { | |
470 | char *buff=lf->buff; | |
471 | size_t bp; | |
472 | char *nlp; | |
473 | ||
474 | bp=strlen(buff); | |
475 | assert(bp < LOG_MESSAGE_BUFLEN); | |
476 | vsnprintf(buff+bp,LOG_MESSAGE_BUFLEN-bp,message,ap); | |
477 | buff[LOG_MESSAGE_BUFLEN-1] = '\n'; | |
478 | buff[LOG_MESSAGE_BUFLEN] = '\0'; | |
479 | /* Each line is sent separately */ | |
480 | while ((nlp=strchr(buff,'\n'))) { | |
481 | *nlp=0; | |
482 | slilog(lf,priority,"%s",buff); | |
483 | memmove(buff,nlp+1,strlen(nlp+1)+1); | |
484 | } | |
485 | } | |
486 | ||
487 | extern void slilog_part(struct log_if *lf, int priority, const char *message, ...) | |
488 | { | |
489 | va_list ap; | |
490 | va_start(ap,message); | |
491 | vslilog_part(lf,priority,message,ap); | |
492 | va_end(ap); | |
493 | } | |
a32d56fb | 494 | |
bb839899 IJ |
495 | void string_item_to_iaddr(const item_t *item, uint16_t port, union iaddr *ia, |
496 | const char *desc) | |
497 | { | |
498 | #ifndef CONFIG_IPV6 | |
499 | ||
500 | ia->sin.sin_family=AF_INET; | |
501 | ia->sin.sin_addr.s_addr=string_item_to_ipaddr(item,desc); | |
502 | ||
503 | #else /* CONFIG_IPV6 => we have adns_text2addr */ | |
504 | ||
505 | if (item->type!=t_string) | |
506 | cfgfatal(item->loc,desc,"expecting a string IP (v4 or v6) address\n"); | |
507 | socklen_t salen=sizeof(*ia); | |
508 | int r=adns_text2addr(item->data.string, port, | |
509 | adns_qf_addrlit_ipv4_quadonly, | |
510 | &ia->sa, &salen); | |
511 | assert(r!=ENOSPC); | |
512 | if (r) cfgfatal(item->loc,desc,"invalid IP (v4 or v6) address: %s\n", | |
513 | strerror(r)); | |
514 | ||
515 | #endif /* CONFIG_IPV6 */ | |
516 | } | |
517 | ||
771a583a IJ |
518 | #define IADDR_NBUFS_SHIFT 3 |
519 | #define IADDR_NBUFS (1 << IADDR_NBUFS_SHIFT) | |
520 | ||
a32d56fb IJ |
521 | const char *iaddr_to_string(const union iaddr *ia) |
522 | { | |
a32d56fb IJ |
523 | static int b; |
524 | ||
771a583a IJ |
525 | b++; |
526 | b &= IADDR_NBUFS-1; | |
a32d56fb | 527 | |
61dbc9e0 IJ |
528 | #ifndef CONFIG_IPV6 |
529 | ||
530 | static char bufs[IADDR_NBUFS][100]; | |
531 | ||
a32d56fb IJ |
532 | assert(ia->sa.sa_family == AF_INET); |
533 | ||
534 | snprintf(bufs[b], sizeof(bufs[b]), "[%s]:%d", | |
535 | inet_ntoa(ia->sin.sin_addr), | |
536 | ntohs(ia->sin.sin_port)); | |
61dbc9e0 IJ |
537 | |
538 | #else /* CONFIG_IPV6 => we have adns_addr2text */ | |
539 | ||
540 | static char bufs[IADDR_NBUFS][1+ADNS_ADDR2TEXT_BUFLEN+20]; | |
541 | ||
542 | int port; | |
543 | ||
544 | char *addrbuf = bufs[b]; | |
545 | *addrbuf++ = '['; | |
546 | int addrbuflen = ADNS_ADDR2TEXT_BUFLEN; | |
547 | ||
548 | int r = adns_addr2text(&ia->sa, 0, addrbuf, &addrbuflen, &port); | |
549 | if (r) { | |
550 | const char fmt[]= "scoped IPv6 addr, error: %.*s"; | |
551 | sprintf(addrbuf, fmt, | |
552 | ADNS_ADDR2TEXT_BUFLEN - sizeof(fmt) /* underestimate */, | |
553 | strerror(r)); | |
554 | } | |
555 | ||
556 | char *portbuf = addrbuf; | |
557 | int addrl = strlen(addrbuf); | |
558 | portbuf += addrl; | |
559 | ||
560 | snprintf(portbuf, sizeof(bufs[b])-addrl, "]:%d", port); | |
561 | ||
562 | #endif /* CONFIG_IPV6 */ | |
563 | ||
a32d56fb IJ |
564 | return bufs[b]; |
565 | } | |
566 | ||
567 | bool_t iaddr_equal(const union iaddr *ia, const union iaddr *ib) | |
568 | { | |
569 | if (ia->sa.sa_family != ib->sa.sa_family) | |
570 | return 0; | |
571 | switch (ia->sa.sa_family) { | |
572 | case AF_INET: | |
573 | return ia->sin.sin_addr.s_addr == ib->sin.sin_addr.s_addr | |
574 | && ia->sin.sin_port == ib->sin.sin_port; | |
61dbc9e0 IJ |
575 | #ifdef CONFIG_IPV6 |
576 | case AF_INET6: | |
577 | return !memcmp(&ia->sin6.sin6_addr, &ib->sin6.sin6_addr, 16) | |
578 | && ia->sin6.sin6_scope_id == ib->sin6.sin6_scope_id | |
579 | && ia->sin6.sin6_port == ib->sin6.sin6_port | |
580 | /* we ignore the flowinfo field */; | |
581 | #endif /* CONFIG_IPV6 */ | |
a32d56fb IJ |
582 | default: |
583 | abort(); | |
584 | } | |
585 | } | |
586 | ||
587 | int iaddr_socklen(const union iaddr *ia) | |
588 | { | |
589 | switch (ia->sa.sa_family) { | |
590 | case AF_INET: return sizeof(ia->sin); | |
61dbc9e0 IJ |
591 | #ifdef CONFIG_IPV6 |
592 | case AF_INET6: return sizeof(ia->sin6); | |
593 | #endif /* CONFIG_IPV6 */ | |
a32d56fb IJ |
594 | default: abort(); |
595 | } | |
596 | } |