1 /*
2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-2000 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 2005-2016 Dmitry V. Levin <ldv@altlinux.org>
7 * Copyright (c) 2016-2018 The strace developers.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include "defs.h"
34 #include "print_fields.h"
35
36 #include <sys/socket.h>
37 #include <sys/un.h>
38 #include <netinet/in.h>
39 #include <arpa/inet.h>
40
41 #include "netlink.h"
42 #include <linux/ax25.h>
43 #include <linux/if_packet.h>
44 #include <linux/if_arp.h>
45 #include <linux/if_ether.h>
46 #include <linux/x25.h>
47
48 #ifdef HAVE_NETIPX_IPX_H
49 # include <netipx/ipx.h>
50 #else
51 # include <linux/ipx.h>
52 #endif
53
54 #include "xlat/addrfams.h"
55 #include "xlat/arp_hardware_types.h"
56 #include "xlat/ethernet_protocols.h"
57 #include "xlat/af_packet_types.h"
58
59 #include "xlat/bdaddr_types.h"
60 #include "xlat/bluetooth_l2_cid.h"
61 #include "xlat/bluetooth_l2_psm.h"
62 #include "xlat/hci_channels.h"
63
64 #define SIZEOF_SA_FAMILY sizeof(((struct sockaddr *) 0)->sa_family)
65
66 const size_t arp_hardware_types_size = ARRAY_SIZE(arp_hardware_types) - 1;
67 const size_t ethernet_protocols_size = ARRAY_SIZE(ethernet_protocols) - 1;
68
69 static void
print_sockaddr_data_un(const void * const buf,const int addrlen)70 print_sockaddr_data_un(const void *const buf, const int addrlen)
71 {
72 const struct sockaddr_un *const sa_un = buf;
73 const int un_len = addrlen > (int) sizeof(*sa_un)
74 ? (int) sizeof(*sa_un) : addrlen;
75 const int path_len = un_len - SIZEOF_SA_FAMILY;
76
77 tprints("sun_path=");
78 if (sa_un->sun_path[0]) {
79 print_quoted_string(sa_un->sun_path, path_len + 1,
80 QUOTE_0_TERMINATED);
81 } else {
82 tprints("@");
83 print_quoted_string(sa_un->sun_path + 1, path_len - 1, 0);
84 }
85 }
86
87 bool
print_inet_addr(const int af,const void * const addr,const unsigned int len,const char * const var_name)88 print_inet_addr(const int af,
89 const void *const addr,
90 const unsigned int len,
91 const char *const var_name)
92 {
93 char buf[INET6_ADDRSTRLEN];
94
95 switch (af) {
96 case AF_INET:
97 if (inet_ntop(af, addr, buf, sizeof(buf))) {
98 if (var_name)
99 tprintf("%s=inet_addr(\"%s\")", var_name, buf);
100 else
101 tprints(buf);
102 return true;
103 }
104 break;
105 case AF_INET6:
106 if (inet_ntop(af, addr, buf, sizeof(buf))) {
107 if (var_name)
108 tprintf("inet_pton(%s, \"%s\", &%s)",
109 "AF_INET6", buf, var_name);
110 else
111 tprints(buf);
112 return true;
113 }
114 break;
115 }
116
117 if (var_name)
118 tprintf("%s=", var_name);
119 print_quoted_string(addr, len, QUOTE_FORCE_HEX);
120 return false;
121 }
122
123 bool
decode_inet_addr(struct tcb * const tcp,const kernel_ulong_t addr,const unsigned int len,const int family,const char * const var_name)124 decode_inet_addr(struct tcb *const tcp,
125 const kernel_ulong_t addr,
126 const unsigned int len,
127 const int family,
128 const char *const var_name)
129 {
130 union {
131 struct in_addr a4;
132 struct in6_addr a6;
133 } addrbuf;
134 size_t size = 0;
135
136 switch (family) {
137 case AF_INET:
138 size = sizeof(addrbuf.a4);
139 break;
140 case AF_INET6:
141 size = sizeof(addrbuf.a6);
142 break;
143 }
144
145 if (!size || len < size) {
146 if (var_name)
147 tprintf("%s=", var_name);
148 printstr_ex(tcp, addr, len, QUOTE_FORCE_HEX);
149 return false;
150 }
151
152 if (umoven(tcp, addr, size, &addrbuf) < 0) {
153 if (var_name)
154 tprintf("%s=", var_name);
155 printaddr(addr);
156 return false;
157 }
158
159 return print_inet_addr(family, &addrbuf, size, var_name);
160 }
161
162 static void
print_sockaddr_data_in(const void * const buf,const int addrlen)163 print_sockaddr_data_in(const void *const buf, const int addrlen)
164 {
165 const struct sockaddr_in *const sa_in = buf;
166
167 PRINT_FIELD_NET_PORT("", *sa_in, sin_port);
168 PRINT_FIELD_INET4_ADDR(", ", *sa_in, sin_addr);
169 }
170
171 #define SIN6_MIN_LEN offsetof(struct sockaddr_in6, sin6_scope_id)
172
173 static void
print_sockaddr_data_in6(const void * const buf,const int addrlen)174 print_sockaddr_data_in6(const void *const buf, const int addrlen)
175 {
176 const struct sockaddr_in6 *const sa_in6 = buf;
177
178 PRINT_FIELD_NET_PORT("", *sa_in6, sin6_port);
179 PRINT_FIELD_INET_ADDR(", ", *sa_in6, sin6_addr, AF_INET6);
180 tprintf(", sin6_flowinfo=htonl(%u)", ntohl(sa_in6->sin6_flowinfo));
181
182 if (addrlen <= (int) SIN6_MIN_LEN)
183 return;
184
185 #if defined IN6_IS_ADDR_LINKLOCAL && defined IN6_IS_ADDR_MC_LINKLOCAL
186 if (IN6_IS_ADDR_LINKLOCAL(&sa_in6->sin6_addr)
187 || IN6_IS_ADDR_MC_LINKLOCAL(&sa_in6->sin6_addr))
188 PRINT_FIELD_IFINDEX(", ", *sa_in6, sin6_scope_id);
189 else
190 #endif
191 PRINT_FIELD_U(", ", *sa_in6, sin6_scope_id);
192 }
193
194 /**
195 * Check that we can print an AX.25 address in its native form, otherwise it
196 * makes sense to print it in raw also (or in raw only).
197 */
198 enum xlat_style
check_ax25_address(const ax25_address * addr)199 check_ax25_address(const ax25_address *addr)
200 {
201 enum xlat_style ret = XLAT_STYLE_DEFAULT;
202 bool space_seen = false;
203 bool char_seen = false;
204
205 for (size_t i = 0; i < ARRAY_SIZE(addr->ax25_call) - 1; i++) {
206 unsigned char c = addr->ax25_call[i];
207
208 /* The lowest bit should be zero */
209 if (c & 1)
210 ret = XLAT_STYLE_VERBOSE;
211
212 c >>= 1;
213
214 if (c == ' ')
215 space_seen = true;
216 else
217 char_seen = true;
218
219 /* Sane address contains only numbers and uppercase letters */
220 if ((c < '0' || c > '9') && (c < 'A' || c > 'Z') && c != ' ')
221 ret = XLAT_STYLE_VERBOSE;
222 if (c != ' ' && space_seen)
223 ret = XLAT_STYLE_VERBOSE;
224
225 /* non-printable chars */
226 if (c < ' ' || c > 0x7e
227 /* characters used for printing comments */
228 || c == '*' || c == '/')
229 return XLAT_STYLE_RAW;
230 }
231
232 if (addr->ax25_call[ARRAY_SIZE(addr->ax25_call) - 1] & ~0x1e)
233 ret = XLAT_STYLE_VERBOSE;
234
235 if (!char_seen && addr->ax25_call[ARRAY_SIZE(addr->ax25_call) - 1])
236 ret = XLAT_STYLE_VERBOSE;
237
238 return ret;
239 }
240
241 /** Convert a (presumably) valid AX.25 to a string */
242 static const char *
ax25_addr2str(const ax25_address * addr)243 ax25_addr2str(const ax25_address *addr)
244 {
245 static char buf[ARRAY_SIZE(addr->ax25_call) + sizeof("-15")];
246 char *p = buf;
247 size_t end;
248
249 for (end = ARRAY_SIZE(addr->ax25_call) - 1; end; end--)
250 if ((addr->ax25_call[end - 1] >> 1) != ' ')
251 break;
252
253 for (size_t i = 0; i < end; i++)
254 *p++ = ((unsigned char) addr->ax25_call[i]) >> 1;
255
256 *p++ = '-';
257
258 unsigned char ssid = (addr->ax25_call[ARRAY_SIZE(addr->ax25_call) - 1]
259 >> 1) & 0xf;
260
261 if (ssid > 9) {
262 *p++ = '1';
263 ssid -= 10;
264 }
265
266 *p++ = ssid + '0';
267 *p = '\0';
268
269 if (buf[0] == '-' && buf[1] == '0')
270 return "*";
271
272 return buf;
273 }
274
275 static void
print_ax25_addr_raw(const ax25_address * addr)276 print_ax25_addr_raw(const ax25_address *addr)
277 {
278 PRINT_FIELD_HEX_ARRAY("{", *addr, ax25_call);
279 tprints("}");
280 }
281
282 void
print_ax25_addr(const void * addr_void)283 print_ax25_addr(const void /* ax25_address */ *addr_void)
284 {
285 const ax25_address *addr = addr_void;
286 enum xlat_style xs = check_ax25_address(addr);
287
288 if (xs == XLAT_STYLE_DEFAULT)
289 xs = xlat_verbose(xlat_verbosity);
290
291 if (xs != XLAT_STYLE_ABBREV)
292 print_ax25_addr_raw(addr);
293
294 if (xs == XLAT_STYLE_RAW)
295 return;
296
297 const char *addr_str = ax25_addr2str(addr);
298
299 (xs == XLAT_STYLE_VERBOSE ? tprints_comment : tprints)(addr_str);
300 }
301
302 static void
print_sockaddr_data_ax25(const void * const buf,const int addrlen)303 print_sockaddr_data_ax25(const void *const buf, const int addrlen)
304 {
305 const struct full_sockaddr_ax25 *const sax25 = buf;
306 size_t addrlen_us = MAX(addrlen, 0);
307 bool full = sax25->fsa_ax25.sax25_ndigis ||
308 (addrlen_us > sizeof(struct sockaddr_ax25));
309
310 if (full)
311 tprints("fsa_ax25={");
312
313 tprints("sax25_call=");
314 print_ax25_addr(&sax25->fsa_ax25.sax25_call);
315 PRINT_FIELD_D(", ", sax25->fsa_ax25, sax25_ndigis);
316
317 if (!full)
318 return;
319
320 tprints("}");
321
322 size_t has_digis = MIN((addrlen_us - sizeof(sax25->fsa_ax25))
323 / sizeof(sax25->fsa_digipeater[0]),
324 ARRAY_SIZE(sax25->fsa_digipeater));
325 size_t want_digis = MIN(
326 (unsigned int) MAX(sax25->fsa_ax25.sax25_ndigis, 0),
327 ARRAY_SIZE(sax25->fsa_digipeater));
328 size_t digis = MIN(has_digis, want_digis);
329
330 if (want_digis == 0)
331 goto digis_end;
332
333 tprints(", fsa_digipeater=[");
334 for (size_t i = 0; i < digis; i++) {
335 if (i)
336 tprints(", ");
337
338 print_ax25_addr(sax25->fsa_digipeater + i);
339 }
340
341 if (want_digis > has_digis)
342 tprintf("%s/* ??? */", digis ? ", " : "");
343
344 tprints("]");
345
346 digis_end:
347 if (addrlen_us > (has_digis * sizeof(sax25->fsa_digipeater[0])
348 + sizeof(sax25->fsa_ax25)))
349 tprints(", ...");
350 }
351
352 static void
print_sockaddr_data_ipx(const void * const buf,const int addrlen)353 print_sockaddr_data_ipx(const void *const buf, const int addrlen)
354 {
355 const struct sockaddr_ipx *const sa_ipx = buf;
356 unsigned int i;
357
358 PRINT_FIELD_NET_PORT("", *sa_ipx, sipx_port);
359 tprintf(", sipx_network=htonl(%#08x)"
360 ", sipx_node=[",
361 ntohl(sa_ipx->sipx_network));
362 for (i = 0; i < IPX_NODE_LEN; ++i) {
363 tprintf("%s%#02x", i ? ", " : "",
364 sa_ipx->sipx_node[i]);
365 }
366 PRINT_FIELD_0X("], ", *sa_ipx, sipx_type);
367 }
368
369 void
print_x25_addr(const void * addr_void)370 print_x25_addr(const void /* struct x25_address */ *addr_void)
371 {
372 const struct x25_address *addr = addr_void;
373
374 tprints("{x25_addr=");
375 print_quoted_cstring(addr->x25_addr, sizeof(addr->x25_addr));
376 tprints("}");
377 }
378
379 static void
print_sockaddr_data_x25(const void * const buf,const int addrlen)380 print_sockaddr_data_x25(const void *const buf, const int addrlen)
381 {
382 const struct sockaddr_x25 *const sa_x25 = buf;
383
384 PRINT_FIELD_X25_ADDR("", *sa_x25, sx25_addr);
385 }
386
387 static void
print_sockaddr_data_nl(const void * const buf,const int addrlen)388 print_sockaddr_data_nl(const void *const buf, const int addrlen)
389 {
390 const struct sockaddr_nl *const sa_nl = buf;
391
392 PRINT_FIELD_D("", *sa_nl, nl_pid);
393 PRINT_FIELD_0X(", ", *sa_nl, nl_groups);
394 }
395
396 static void
print_sockaddr_data_ll(const void * const buf,const int addrlen)397 print_sockaddr_data_ll(const void *const buf, const int addrlen)
398 {
399 const struct sockaddr_ll *const sa_ll = buf;
400
401 tprints("sll_protocol=htons(");
402 printxval_search(ethernet_protocols, ntohs(sa_ll->sll_protocol),
403 "ETH_P_???");
404 PRINT_FIELD_IFINDEX("), ", *sa_ll, sll_ifindex);
405 tprints(", sll_hatype=");
406 printxval_search(arp_hardware_types, sa_ll->sll_hatype, "ARPHRD_???");
407 tprints(", sll_pkttype=");
408 printxval_index(af_packet_types, sa_ll->sll_pkttype, "PACKET_???");
409 tprintf(", sll_halen=%u", sa_ll->sll_halen);
410 if (sa_ll->sll_halen) {
411 const unsigned int oob_halen =
412 addrlen - offsetof(struct sockaddr_ll, sll_addr);
413 unsigned int i;
414
415 tprints(", sll_addr=[");
416 for (i = 0; i < sa_ll->sll_halen; ++i) {
417 if (i)
418 tprints(", ");
419 if (i >= oob_halen) {
420 tprints("...");
421 break;
422 }
423 tprintf("%#02x", sa_ll->sll_addr[i]);
424 }
425 tprints("]");
426 }
427 }
428
429 static void
print_sockaddr_data_raw(const void * const buf,const int addrlen)430 print_sockaddr_data_raw(const void *const buf, const int addrlen)
431 {
432 const char *const data = buf + SIZEOF_SA_FAMILY;
433 const int datalen = addrlen - SIZEOF_SA_FAMILY;
434
435 tprints("sa_data=");
436 print_quoted_string(data, datalen, 0);
437 }
438
439 static uint16_t
btohs(uint16_t val)440 btohs(uint16_t val)
441 {
442 #ifdef WORDS_BIGENDIAN
443 return (val << 8) | (val >> 8);
444 #else
445 return val;
446 #endif
447 }
448
449 static void
print_bluetooth_l2_psm(const char * prefix,uint16_t psm)450 print_bluetooth_l2_psm(const char *prefix, uint16_t psm)
451 {
452 const uint16_t psm_he = btohs(psm);
453 const char *psm_name = xlookup(bluetooth_l2_psm, psm_he);
454 const bool psm_str = psm_name || (psm_he >= L2CAP_PSM_LE_DYN_START
455 && psm_he <= L2CAP_PSM_LE_DYN_END)
456 || (psm_he >= L2CAP_PSM_DYN_START);
457
458 tprintf("%shtobs(", prefix);
459
460 if (xlat_verbose(xlat_verbosity) != XLAT_STYLE_ABBREV || !psm_str)
461 tprintf("%#x", psm_he);
462
463 if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW)
464 goto print_bluetooth_l2_psm_end;
465
466 if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE || !psm_str)
467 tprints(" /* ");
468
469 if (psm_name) {
470 tprints(psm_name);
471 } else if (psm_he >= L2CAP_PSM_LE_DYN_START
472 && psm_he <= L2CAP_PSM_LE_DYN_END) {
473 print_xlat(L2CAP_PSM_LE_DYN_START);
474 tprintf(" + %u", psm_he - L2CAP_PSM_LE_DYN_START);
475 } else if (psm_he >= L2CAP_PSM_DYN_START) {
476 print_xlat(L2CAP_PSM_DYN_START);
477 tprintf(" + %u", psm_he - L2CAP_PSM_DYN_START);
478 } else {
479 tprints("L2CAP_PSM_???");
480 }
481
482 if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE || !psm_str)
483 tprints(" */");
484
485 print_bluetooth_l2_psm_end:
486 tprints(")");
487 }
488
489 static void
print_bluetooth_l2_cid(const char * prefix,uint16_t cid)490 print_bluetooth_l2_cid(const char *prefix, uint16_t cid)
491 {
492 const uint16_t cid_he = btohs(cid);
493 const char *cid_name = xlookup(bluetooth_l2_cid, cid_he);
494 const bool cid_str = cid_name || (cid_he >= L2CAP_CID_DYN_START);
495
496 tprintf("%shtobs(", prefix);
497
498 if (xlat_verbose(xlat_verbosity) != XLAT_STYLE_ABBREV || !cid_str)
499 tprintf("%#x", cid_he);
500
501 if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW)
502 goto print_bluetooth_l2_cid_end;
503
504 if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE || !cid_str)
505 tprints(" /* ");
506
507 if (cid_name) {
508 tprints(cid_name);
509 } else if (cid_he >= L2CAP_CID_DYN_START) {
510 print_xlat(L2CAP_CID_DYN_START);
511 tprintf(" + %u", cid_he - L2CAP_CID_DYN_START);
512 } else {
513 tprints("L2CAP_CID_???");
514 }
515
516 if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE || !cid_str)
517 tprints(" */");
518
519 print_bluetooth_l2_cid_end:
520 tprints(")");
521 }
522
523 static void
print_sockaddr_data_bt(const void * const buf,const int addrlen)524 print_sockaddr_data_bt(const void *const buf, const int addrlen)
525 {
526 struct sockaddr_hci {
527 /* sa_family_t */ uint16_t hci_family;
528 uint16_t hci_dev;
529 uint16_t hci_channel;
530 };
531
532 struct bdaddr {
533 uint8_t b[6];
534 } ATTRIBUTE_PACKED;
535
536 struct sockaddr_sco {
537 /* sa_family_t */ uint16_t sco_family;
538 struct bdaddr sco_bdaddr;
539 };
540
541 struct sockaddr_rc {
542 /* sa_family_t */ uint16_t rc_family;
543 struct bdaddr rc_bdaddr;
544 uint8_t rc_channel;
545 };
546
547 struct sockaddr_l2 {
548 /* sa_family_t */ uint16_t l2_family;
549 /* little endian */ uint16_t l2_psm;
550 struct bdaddr l2_bdaddr;
551 /* little endian */ uint16_t l2_cid;
552 uint8_t l2_bdaddr_type;
553 };
554
555 switch (addrlen) {
556 case sizeof(struct sockaddr_hci): {
557 const struct sockaddr_hci *const hci = buf;
558 tprintf("hci_dev=htobs(%hu), hci_channel=",
559 btohs(hci->hci_dev));
560 printxval_index(hci_channels, hci->hci_channel,
561 "HCI_CHANNEL_???");
562 break;
563 }
564 case sizeof(struct sockaddr_sco): {
565 const struct sockaddr_sco *const sco = buf;
566 print_mac_addr("sco_bdaddr=", sco->sco_bdaddr.b,
567 sizeof(sco->sco_bdaddr.b));
568 break;
569 }
570 case sizeof(struct sockaddr_rc): {
571 const struct sockaddr_rc *const rc = buf;
572 print_mac_addr("rc_bdaddr=", rc->rc_bdaddr.b,
573 sizeof(rc->rc_bdaddr.b));
574 tprintf(", rc_channel=%u", rc->rc_channel);
575 break;
576 }
577 case offsetof(struct sockaddr_l2, l2_bdaddr_type):
578 case sizeof(struct sockaddr_l2): {
579 const struct sockaddr_l2 *const l2 = buf;
580 print_bluetooth_l2_psm("l2_psm=", l2->l2_psm);
581 print_mac_addr(", l2_bdaddr=", l2->l2_bdaddr.b,
582 sizeof(l2->l2_bdaddr.b));
583 print_bluetooth_l2_cid(", l2_cid=", l2->l2_cid);
584
585 if (addrlen == sizeof(struct sockaddr_l2)) {
586 tprints(", l2_bdaddr_type=");
587 printxval_index(bdaddr_types, l2->l2_bdaddr_type,
588 "BDADDR_???");
589 }
590
591 break;
592 }
593 default:
594 print_sockaddr_data_raw(buf, addrlen);
595 break;
596 }
597 }
598
599 typedef void (* const sockaddr_printer)(const void *const, const int);
600
601 static const struct {
602 const sockaddr_printer printer;
603 const int min_len;
604 } sa_printers[] = {
605 [AF_UNIX] = { print_sockaddr_data_un, SIZEOF_SA_FAMILY + 1 },
606 [AF_INET] = { print_sockaddr_data_in, sizeof(struct sockaddr_in) },
607 [AF_AX25] = { print_sockaddr_data_ax25, sizeof(struct sockaddr_ax25) },
608 [AF_IPX] = { print_sockaddr_data_ipx, sizeof(struct sockaddr_ipx) },
609 [AF_X25] = { print_sockaddr_data_x25, sizeof(struct sockaddr_x25) },
610 [AF_INET6] = { print_sockaddr_data_in6, SIN6_MIN_LEN },
611 [AF_NETLINK] = { print_sockaddr_data_nl, SIZEOF_SA_FAMILY + 1 },
612 [AF_PACKET] = { print_sockaddr_data_ll, sizeof(struct sockaddr_ll) },
613 [AF_BLUETOOTH] = { print_sockaddr_data_bt, SIZEOF_SA_FAMILY + 1 },
614 };
615
616 void
print_sockaddr(const void * const buf,const int addrlen)617 print_sockaddr(const void *const buf, const int addrlen)
618 {
619 const struct sockaddr *const sa = buf;
620
621 tprints("{sa_family=");
622 printxval_index(addrfams, sa->sa_family, "AF_???");
623
624 if (addrlen > (int) SIZEOF_SA_FAMILY) {
625 tprints(", ");
626
627 if (sa->sa_family < ARRAY_SIZE(sa_printers)
628 && sa_printers[sa->sa_family].printer
629 && addrlen >= sa_printers[sa->sa_family].min_len) {
630 sa_printers[sa->sa_family].printer(buf, addrlen);
631 } else {
632 print_sockaddr_data_raw(buf, addrlen);
633 }
634 }
635
636 tprints("}");
637 }
638
639 int
decode_sockaddr(struct tcb * const tcp,const kernel_ulong_t addr,int addrlen)640 decode_sockaddr(struct tcb *const tcp, const kernel_ulong_t addr, int addrlen)
641 {
642 if (addrlen < 2) {
643 printaddr(addr);
644 return -1;
645 }
646
647 union {
648 struct sockaddr sa;
649 struct sockaddr_storage storage;
650 char pad[sizeof(struct sockaddr_storage) + 1];
651 } addrbuf;
652
653 if ((unsigned) addrlen > sizeof(addrbuf.storage))
654 addrlen = sizeof(addrbuf.storage);
655
656 if (umoven_or_printaddr(tcp, addr, addrlen, addrbuf.pad))
657 return -1;
658
659 memset(&addrbuf.pad[addrlen], 0, sizeof(addrbuf.pad) - addrlen);
660
661 print_sockaddr(&addrbuf, addrlen);
662
663 return addrbuf.sa.sa_family;
664 }
665