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s3-pdb_ipa: Add ipasam_create_dom_group()
[Samba/vl.git] / source3 / lib / util_sock.c
blobb010c991f798bfdcce93ab065d184361727b41d1
1 /*
2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Tim Potter 2000-2001
6 Copyright (C) Jeremy Allison 1992-2007
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "memcache.h"
25 #include "../lib/async_req/async_sock.h"
26 #include "../lib/util/select.h"
27 #include "interfaces.h"
28
29 /****************************************************************************
30 Get a port number in host byte order from a sockaddr_storage.
31 ****************************************************************************/
32
33 uint16_t get_sockaddr_port(const struct sockaddr_storage *pss)
34 {
35 uint16_t port = 0;
36
37 if (pss->ss_family != AF_INET) {
38 #if defined(HAVE_IPV6)
39 /* IPv6 */
40 const struct sockaddr_in6 *sa6 =
41 (const struct sockaddr_in6 *)pss;
42 port = ntohs(sa6->sin6_port);
43 #endif
44 } else {
45 const struct sockaddr_in *sa =
46 (const struct sockaddr_in *)pss;
47 port = ntohs(sa->sin_port);
48 }
49 return port;
50 }
51
52 /****************************************************************************
53 Print out an IPv4 or IPv6 address from a struct sockaddr_storage.
54 ****************************************************************************/
55
56 static char *print_sockaddr_len(char *dest,
57 size_t destlen,
58 const struct sockaddr *psa,
59 socklen_t psalen)
60 {
61 if (destlen > 0) {
62 dest[0] = '\0';
63 }
64 (void)sys_getnameinfo(psa,
65 psalen,
66 dest, destlen,
67 NULL, 0,
68 NI_NUMERICHOST);
69 return dest;
70 }
71
72 /****************************************************************************
73 Print out an IPv4 or IPv6 address from a struct sockaddr_storage.
74 ****************************************************************************/
75
76 char *print_sockaddr(char *dest,
77 size_t destlen,
78 const struct sockaddr_storage *psa)
79 {
80 return print_sockaddr_len(dest, destlen, (struct sockaddr *)psa,
81 sizeof(struct sockaddr_storage));
82 }
83
84 /****************************************************************************
85 Print out a canonical IPv4 or IPv6 address from a struct sockaddr_storage.
86 ****************************************************************************/
87
88 char *print_canonical_sockaddr(TALLOC_CTX *ctx,
89 const struct sockaddr_storage *pss)
90 {
91 char addr[INET6_ADDRSTRLEN];
92 char *dest = NULL;
93 int ret;
94
95 /* Linux getnameinfo() man pages says port is unitialized if
96 service name is NULL. */
97
98 ret = sys_getnameinfo((const struct sockaddr *)pss,
99 sizeof(struct sockaddr_storage),
100 addr, sizeof(addr),
101 NULL, 0,
102 NI_NUMERICHOST);
103 if (ret != 0) {
104 return NULL;
105 }
106
107 if (pss->ss_family != AF_INET) {
108 #if defined(HAVE_IPV6)
109 dest = talloc_asprintf(ctx, "[%s]", addr);
110 #else
111 return NULL;
112 #endif
113 } else {
114 dest = talloc_asprintf(ctx, "%s", addr);
115 }
116
117 return dest;
118 }
119
120 /****************************************************************************
121 Return the string of an IP address (IPv4 or IPv6).
122 ****************************************************************************/
123
124 static const char *get_socket_addr(int fd, char *addr_buf, size_t addr_len)
125 {
126 struct sockaddr_storage sa;
127 socklen_t length = sizeof(sa);
128
129 /* Ok, returning a hard coded IPv4 address
130 * is bogus, but it's just as bogus as a
131 * zero IPv6 address. No good choice here.
132 */
133
134 strlcpy(addr_buf, "0.0.0.0", addr_len);
135
136 if (fd == -1) {
137 return addr_buf;
138 }
139
140 if (getsockname(fd, (struct sockaddr *)&sa, &length) < 0) {
141 DEBUG(0,("getsockname failed. Error was %s\n",
142 strerror(errno) ));
143 return addr_buf;
144 }
145
146 return print_sockaddr_len(addr_buf, addr_len, (struct sockaddr *)&sa, length);
147 }
148
149 /****************************************************************************
150 Return the port number we've bound to on a socket.
151 ****************************************************************************/
152
153 int get_socket_port(int fd)
154 {
155 struct sockaddr_storage sa;
156 socklen_t length = sizeof(sa);
157
158 if (fd == -1) {
159 return -1;
160 }
161
162 if (getsockname(fd, (struct sockaddr *)&sa, &length) < 0) {
163 int level = (errno == ENOTCONN) ? 2 : 0;
164 DEBUG(level, ("getsockname failed. Error was %s\n",
165 strerror(errno)));
166 return -1;
167 }
168
169 #if defined(HAVE_IPV6)
170 if (sa.ss_family == AF_INET6) {
171 return ntohs(((struct sockaddr_in6 *)&sa)->sin6_port);
172 }
173 #endif
174 if (sa.ss_family == AF_INET) {
175 return ntohs(((struct sockaddr_in *)&sa)->sin_port);
176 }
177 return -1;
178 }
179
180 const char *client_name(int fd)
181 {
182 return get_peer_name(fd,false);
183 }
184
185 const char *client_addr(int fd, char *addr, size_t addrlen)
186 {
187 return get_peer_addr(fd,addr,addrlen);
188 }
189
190 const char *client_socket_addr(int fd, char *addr, size_t addr_len)
191 {
192 return get_socket_addr(fd, addr, addr_len);
193 }
194
195 #if 0
196 /* Not currently used. JRA. */
197 int client_socket_port(int fd)
198 {
199 return get_socket_port(fd);
200 }
201 #endif
202
203 /****************************************************************************
204 Accessor functions to make thread-safe code easier later...
205 ****************************************************************************/
206
207 void set_smb_read_error(enum smb_read_errors *pre,
208 enum smb_read_errors newerr)
209 {
210 if (pre) {
211 *pre = newerr;
212 }
213 }
214
215 void cond_set_smb_read_error(enum smb_read_errors *pre,
216 enum smb_read_errors newerr)
217 {
218 if (pre && *pre == SMB_READ_OK) {
219 *pre = newerr;
220 }
221 }
222
223 /****************************************************************************
224 Determine if a file descriptor is in fact a socket.
225 ****************************************************************************/
226
227 bool is_a_socket(int fd)
228 {
229 int v;
230 socklen_t l;
231 l = sizeof(int);
232 return(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&v, &l) == 0);
233 }
234
235 enum SOCK_OPT_TYPES {OPT_BOOL,OPT_INT,OPT_ON};
236
237 typedef struct smb_socket_option {
238 const char *name;
239 int level;
240 int option;
241 int value;
242 int opttype;
243 } smb_socket_option;
244
245 static const smb_socket_option socket_options[] = {
246 {"SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE, 0, OPT_BOOL},
247 {"SO_REUSEADDR", SOL_SOCKET, SO_REUSEADDR, 0, OPT_BOOL},
248 {"SO_BROADCAST", SOL_SOCKET, SO_BROADCAST, 0, OPT_BOOL},
249 #ifdef TCP_NODELAY
250 {"TCP_NODELAY", IPPROTO_TCP, TCP_NODELAY, 0, OPT_BOOL},
251 #endif
252 #ifdef TCP_KEEPCNT
253 {"TCP_KEEPCNT", IPPROTO_TCP, TCP_KEEPCNT, 0, OPT_INT},
254 #endif
255 #ifdef TCP_KEEPIDLE
256 {"TCP_KEEPIDLE", IPPROTO_TCP, TCP_KEEPIDLE, 0, OPT_INT},
257 #endif
258 #ifdef TCP_KEEPINTVL
259 {"TCP_KEEPINTVL", IPPROTO_TCP, TCP_KEEPINTVL, 0, OPT_INT},
260 #endif
261 #ifdef IPTOS_LOWDELAY
262 {"IPTOS_LOWDELAY", IPPROTO_IP, IP_TOS, IPTOS_LOWDELAY, OPT_ON},
263 #endif
264 #ifdef IPTOS_THROUGHPUT
265 {"IPTOS_THROUGHPUT", IPPROTO_IP, IP_TOS, IPTOS_THROUGHPUT, OPT_ON},
266 #endif
267 #ifdef SO_REUSEPORT
268 {"SO_REUSEPORT", SOL_SOCKET, SO_REUSEPORT, 0, OPT_BOOL},
269 #endif
270 #ifdef SO_SNDBUF
271 {"SO_SNDBUF", SOL_SOCKET, SO_SNDBUF, 0, OPT_INT},
272 #endif
273 #ifdef SO_RCVBUF
274 {"SO_RCVBUF", SOL_SOCKET, SO_RCVBUF, 0, OPT_INT},
275 #endif
276 #ifdef SO_SNDLOWAT
277 {"SO_SNDLOWAT", SOL_SOCKET, SO_SNDLOWAT, 0, OPT_INT},
278 #endif
279 #ifdef SO_RCVLOWAT
280 {"SO_RCVLOWAT", SOL_SOCKET, SO_RCVLOWAT, 0, OPT_INT},
281 #endif
282 #ifdef SO_SNDTIMEO
283 {"SO_SNDTIMEO", SOL_SOCKET, SO_SNDTIMEO, 0, OPT_INT},
284 #endif
285 #ifdef SO_RCVTIMEO
286 {"SO_RCVTIMEO", SOL_SOCKET, SO_RCVTIMEO, 0, OPT_INT},
287 #endif
288 #ifdef TCP_FASTACK
289 {"TCP_FASTACK", IPPROTO_TCP, TCP_FASTACK, 0, OPT_INT},
290 #endif
291 #ifdef TCP_QUICKACK
292 {"TCP_QUICKACK", IPPROTO_TCP, TCP_QUICKACK, 0, OPT_BOOL},
293 #endif
294 #ifdef TCP_KEEPALIVE_THRESHOLD
295 {"TCP_KEEPALIVE_THRESHOLD", IPPROTO_TCP, TCP_KEEPALIVE_THRESHOLD, 0, OPT_INT},
296 #endif
297 #ifdef TCP_KEEPALIVE_ABORT_THRESHOLD
298 {"TCP_KEEPALIVE_ABORT_THRESHOLD", IPPROTO_TCP, TCP_KEEPALIVE_ABORT_THRESHOLD, 0, OPT_INT},
299 #endif
300 {NULL,0,0,0,0}};
301
302 /****************************************************************************
303 Print socket options.
304 ****************************************************************************/
305
306 static void print_socket_options(int s)
307 {
308 int value;
309 socklen_t vlen = 4;
310 const smb_socket_option *p = &socket_options[0];
311
312 /* wrapped in if statement to prevent streams
313 * leak in SCO Openserver 5.0 */
314 /* reported on samba-technical --jerry */
315 if ( DEBUGLEVEL >= 5 ) {
316 DEBUG(5,("Socket options:\n"));
317 for (; p->name != NULL; p++) {
318 if (getsockopt(s, p->level, p->option,
319 (void *)&value, &vlen) == -1) {
320 DEBUGADD(5,("\tCould not test socket option %s.\n",
321 p->name));
322 } else {
323 DEBUGADD(5,("\t%s = %d\n",
324 p->name,value));
325 }
326 }
327 }
328 }
329
330 /****************************************************************************
331 Set user socket options.
332 ****************************************************************************/
333
334 void set_socket_options(int fd, const char *options)
335 {
336 TALLOC_CTX *ctx = talloc_stackframe();
337 char *tok;
338
339 while (next_token_talloc(ctx, &options, &tok," \t,")) {
340 int ret=0,i;
341 int value = 1;
342 char *p;
343 bool got_value = false;
344
345 if ((p = strchr_m(tok,'='))) {
346 *p = 0;
347 value = atoi(p+1);
348 got_value = true;
349 }
350
351 for (i=0;socket_options[i].name;i++)
352 if (strequal(socket_options[i].name,tok))
353 break;
354
355 if (!socket_options[i].name) {
356 DEBUG(0,("Unknown socket option %s\n",tok));
357 continue;
358 }
359
360 switch (socket_options[i].opttype) {
361 case OPT_BOOL:
362 case OPT_INT:
363 ret = setsockopt(fd,socket_options[i].level,
364 socket_options[i].option,
365 (char *)&value,sizeof(int));
366 break;
367
368 case OPT_ON:
369 if (got_value)
370 DEBUG(0,("syntax error - %s "
371 "does not take a value\n",tok));
372
373 {
374 int on = socket_options[i].value;
375 ret = setsockopt(fd,socket_options[i].level,
376 socket_options[i].option,
377 (char *)&on,sizeof(int));
378 }
379 break;
380 }
381
382 if (ret != 0) {
383 /* be aware that some systems like Solaris return
384 * EINVAL to a setsockopt() call when the client
385 * sent a RST previously - no need to worry */
386 DEBUG(2,("Failed to set socket option %s (Error %s)\n",
387 tok, strerror(errno) ));
388 }
389 }
390
391 TALLOC_FREE(ctx);
392 print_socket_options(fd);
393 }
394
395 /****************************************************************************
396 Read from a socket.
397 ****************************************************************************/
398
399 ssize_t read_udp_v4_socket(int fd,
400 char *buf,
401 size_t len,
402 struct sockaddr_storage *psa)
403 {
404 ssize_t ret;
405 socklen_t socklen = sizeof(*psa);
406 struct sockaddr_in *si = (struct sockaddr_in *)psa;
407
408 memset((char *)psa,'\0',socklen);
409
410 ret = (ssize_t)sys_recvfrom(fd,buf,len,0,
411 (struct sockaddr *)psa,&socklen);
412 if (ret <= 0) {
413 /* Don't print a low debug error for a non-blocking socket. */
414 if (errno == EAGAIN) {
415 DEBUG(10,("read_udp_v4_socket: returned EAGAIN\n"));
416 } else {
417 DEBUG(2,("read_udp_v4_socket: failed. errno=%s\n",
418 strerror(errno)));
419 }
420 return 0;
421 }
422
423 if (psa->ss_family != AF_INET) {
424 DEBUG(2,("read_udp_v4_socket: invalid address family %d "
425 "(not IPv4)\n", (int)psa->ss_family));
426 return 0;
427 }
428
429 DEBUG(10,("read_udp_v4_socket: ip %s port %d read: %lu\n",
430 inet_ntoa(si->sin_addr),
431 si->sin_port,
432 (unsigned long)ret));
433
434 return ret;
435 }
436
437 /****************************************************************************
438 Read data from a file descriptor with a timout in msec.
439 mincount = if timeout, minimum to read before returning
440 maxcount = number to be read.
441 time_out = timeout in milliseconds
442 NB. This can be called with a non-socket fd, don't change
443 sys_read() to sys_recv() or other socket call.
444 ****************************************************************************/
445
446 NTSTATUS read_fd_with_timeout(int fd, char *buf,
447 size_t mincnt, size_t maxcnt,
448 unsigned int time_out,
449 size_t *size_ret)
450 {
451 int pollrtn;
452 ssize_t readret;
453 size_t nread = 0;
454
455 /* just checking .... */
456 if (maxcnt <= 0)
457 return NT_STATUS_OK;
458
459 /* Blocking read */
460 if (time_out == 0) {
461 if (mincnt == 0) {
462 mincnt = maxcnt;
463 }
464
465 while (nread < mincnt) {
466 readret = sys_read(fd, buf + nread, maxcnt - nread);
467
468 if (readret == 0) {
469 DEBUG(5,("read_fd_with_timeout: "
470 "blocking read. EOF from client.\n"));
471 return NT_STATUS_END_OF_FILE;
472 }
473
474 if (readret == -1) {
475 return map_nt_error_from_unix(errno);
476 }
477 nread += readret;
478 }
479 goto done;
480 }
481
482 /* Most difficult - timeout read */
483 /* If this is ever called on a disk file and
484 mincnt is greater then the filesize then
485 system performance will suffer severely as
486 select always returns true on disk files */
487
488 for (nread=0; nread < mincnt; ) {
489 int revents;
490
491 pollrtn = poll_intr_one_fd(fd, POLLIN|POLLHUP, time_out,
492 &revents);
493
494 /* Check if error */
495 if (pollrtn == -1) {
496 return map_nt_error_from_unix(errno);
497 }
498
499 /* Did we timeout ? */
500 if ((pollrtn == 0) ||
501 ((revents & (POLLIN|POLLHUP|POLLERR)) == 0)) {
502 DEBUG(10,("read_fd_with_timeout: timeout read. "
503 "select timed out.\n"));
504 return NT_STATUS_IO_TIMEOUT;
505 }
506
507 readret = sys_read(fd, buf+nread, maxcnt-nread);
508
509 if (readret == 0) {
510 /* we got EOF on the file descriptor */
511 DEBUG(5,("read_fd_with_timeout: timeout read. "
512 "EOF from client.\n"));
513 return NT_STATUS_END_OF_FILE;
514 }
515
516 if (readret == -1) {
517 return map_nt_error_from_unix(errno);
518 }
519
520 nread += readret;
521 }
522
523 done:
524 /* Return the number we got */
525 if (size_ret) {
526 *size_ret = nread;
527 }
528 return NT_STATUS_OK;
529 }
530
531 /****************************************************************************
532 Read data from an fd, reading exactly N bytes.
533 NB. This can be called with a non-socket fd, don't add dependencies
534 on socket calls.
535 ****************************************************************************/
536
537 NTSTATUS read_data(int fd, char *buffer, size_t N)
538 {
539 return read_fd_with_timeout(fd, buffer, N, N, 0, NULL);
540 }
541
542 /****************************************************************************
543 Write all data from an iov array
544 NB. This can be called with a non-socket fd, don't add dependencies
545 on socket calls.
546 ****************************************************************************/
547
548 ssize_t write_data_iov(int fd, const struct iovec *orig_iov, int iovcnt)
549 {
550 int i;
551 size_t to_send;
552 ssize_t thistime;
553 size_t sent;
554 struct iovec *iov_copy, *iov;
555
556 to_send = 0;
557 for (i=0; i<iovcnt; i++) {
558 to_send += orig_iov[i].iov_len;
559 }
560
561 thistime = sys_writev(fd, orig_iov, iovcnt);
562 if ((thistime <= 0) || (thistime == to_send)) {
563 return thistime;
564 }
565 sent = thistime;
566
567 /*
568 * We could not send everything in one call. Make a copy of iov that
569 * we can mess with. We keep a copy of the array start in iov_copy for
570 * the TALLOC_FREE, because we're going to modify iov later on,
571 * discarding elements.
572 */
573
574 iov_copy = (struct iovec *)TALLOC_MEMDUP(
575 talloc_tos(), orig_iov, sizeof(struct iovec) * iovcnt);
576
577 if (iov_copy == NULL) {
578 errno = ENOMEM;
579 return -1;
580 }
581 iov = iov_copy;
582
583 while (sent < to_send) {
584 /*
585 * We have to discard "thistime" bytes from the beginning
586 * iov array, "thistime" contains the number of bytes sent
587 * via writev last.
588 */
589 while (thistime > 0) {
590 if (thistime < iov[0].iov_len) {
591 char *new_base =
592 (char *)iov[0].iov_base + thistime;
593 iov[0].iov_base = (void *)new_base;
594 iov[0].iov_len -= thistime;
595 break;
596 }
597 thistime -= iov[0].iov_len;
598 iov += 1;
599 iovcnt -= 1;
600 }
601
602 thistime = sys_writev(fd, iov, iovcnt);
603 if (thistime <= 0) {
604 break;
605 }
606 sent += thistime;
607 }
608
609 TALLOC_FREE(iov_copy);
610 return sent;
611 }
612
613 /****************************************************************************
614 Write data to a fd.
615 NB. This can be called with a non-socket fd, don't add dependencies
616 on socket calls.
617 ****************************************************************************/
618
619 ssize_t write_data(int fd, const char *buffer, size_t N)
620 {
621 struct iovec iov;
622
623 iov.iov_base = CONST_DISCARD(void *, buffer);
624 iov.iov_len = N;
625 return write_data_iov(fd, &iov, 1);
626 }
627
628 /****************************************************************************
629 Send a keepalive packet (rfc1002).
630 ****************************************************************************/
631
632 bool send_keepalive(int client)
633 {
634 unsigned char buf[4];
635
636 buf[0] = SMBkeepalive;
637 buf[1] = buf[2] = buf[3] = 0;
638
639 return(write_data(client,(char *)buf,4) == 4);
640 }
641
642 /****************************************************************************
643 Read 4 bytes of a smb packet and return the smb length of the packet.
644 Store the result in the buffer.
645 This version of the function will return a length of zero on receiving
646 a keepalive packet.
647 Timeout is in milliseconds.
648 ****************************************************************************/
649
650 NTSTATUS read_smb_length_return_keepalive(int fd, char *inbuf,
651 unsigned int timeout,
652 size_t *len)
653 {
654 int msg_type;
655 NTSTATUS status;
656
657 status = read_fd_with_timeout(fd, inbuf, 4, 4, timeout, NULL);
658
659 if (!NT_STATUS_IS_OK(status)) {
660 return status;
661 }
662
663 *len = smb_len(inbuf);
664 msg_type = CVAL(inbuf,0);
665
666 if (msg_type == SMBkeepalive) {
667 DEBUG(5,("Got keepalive packet\n"));
668 }
669
670 DEBUG(10,("got smb length of %lu\n",(unsigned long)(*len)));
671
672 return NT_STATUS_OK;
673 }
674
675 /****************************************************************************
676 Read an smb from a fd.
677 The timeout is in milliseconds.
678 This function will return on receipt of a session keepalive packet.
679 maxlen is the max number of bytes to return, not including the 4 byte
680 length. If zero it means buflen limit.
681 Doesn't check the MAC on signed packets.
682 ****************************************************************************/
683
684 NTSTATUS receive_smb_raw(int fd, char *buffer, size_t buflen, unsigned int timeout,
685 size_t maxlen, size_t *p_len)
686 {
687 size_t len;
688 NTSTATUS status;
689
690 status = read_smb_length_return_keepalive(fd,buffer,timeout,&len);
691
692 if (!NT_STATUS_IS_OK(status)) {
693 DEBUG(0, ("read_fd_with_timeout failed, read "
694 "error = %s.\n", nt_errstr(status)));
695 return status;
696 }
697
698 if (len > buflen) {
699 DEBUG(0,("Invalid packet length! (%lu bytes).\n",
700 (unsigned long)len));
701 return NT_STATUS_INVALID_PARAMETER;
702 }
703
704 if(len > 0) {
705 if (maxlen) {
706 len = MIN(len,maxlen);
707 }
708
709 status = read_fd_with_timeout(
710 fd, buffer+4, len, len, timeout, &len);
711
712 if (!NT_STATUS_IS_OK(status)) {
713 DEBUG(0, ("read_fd_with_timeout failed, read error = "
714 "%s.\n", nt_errstr(status)));
715 return status;
716 }
717
718 /* not all of samba3 properly checks for packet-termination
719 * of strings. This ensures that we don't run off into
720 * empty space. */
721 SSVAL(buffer+4,len, 0);
722 }
723
724 *p_len = len;
725 return NT_STATUS_OK;
726 }
727
728 /****************************************************************************
729 Open a socket of the specified type, port, and address for incoming data.
730 ****************************************************************************/
731
732 int open_socket_in(int type,
733 uint16_t port,
734 int dlevel,
735 const struct sockaddr_storage *psock,
736 bool rebind)
737 {
738 struct sockaddr_storage sock;
739 int res;
740 socklen_t slen = sizeof(struct sockaddr_in);
741
742 sock = *psock;
743
744 #if defined(HAVE_IPV6)
745 if (sock.ss_family == AF_INET6) {
746 ((struct sockaddr_in6 *)&sock)->sin6_port = htons(port);
747 slen = sizeof(struct sockaddr_in6);
748 }
749 #endif
750 if (sock.ss_family == AF_INET) {
751 ((struct sockaddr_in *)&sock)->sin_port = htons(port);
752 }
753
754 res = socket(sock.ss_family, type, 0 );
755 if( res == -1 ) {
756 if( DEBUGLVL(0) ) {
757 dbgtext( "open_socket_in(): socket() call failed: " );
758 dbgtext( "%s\n", strerror( errno ) );
759 }
760 return -1;
761 }
762
763 /* This block sets/clears the SO_REUSEADDR and possibly SO_REUSEPORT. */
764 {
765 int val = rebind ? 1 : 0;
766 if( setsockopt(res,SOL_SOCKET,SO_REUSEADDR,
767 (char *)&val,sizeof(val)) == -1 ) {
768 if( DEBUGLVL( dlevel ) ) {
769 dbgtext( "open_socket_in(): setsockopt: " );
770 dbgtext( "SO_REUSEADDR = %s ",
771 val?"true":"false" );
772 dbgtext( "on port %d failed ", port );
773 dbgtext( "with error = %s\n", strerror(errno) );
774 }
775 }
776 #ifdef SO_REUSEPORT
777 if( setsockopt(res,SOL_SOCKET,SO_REUSEPORT,
778 (char *)&val,sizeof(val)) == -1 ) {
779 if( DEBUGLVL( dlevel ) ) {
780 dbgtext( "open_socket_in(): setsockopt: ");
781 dbgtext( "SO_REUSEPORT = %s ",
782 val?"true":"false");
783 dbgtext( "on port %d failed ", port);
784 dbgtext( "with error = %s\n", strerror(errno));
785 }
786 }
787 #endif /* SO_REUSEPORT */
788 }
789
790 /* now we've got a socket - we need to bind it */
791 if (bind(res, (struct sockaddr *)&sock, slen) == -1 ) {
792 if( DEBUGLVL(dlevel) && (port == SMB_PORT1 ||
793 port == SMB_PORT2 || port == NMB_PORT) ) {
794 char addr[INET6_ADDRSTRLEN];
795 print_sockaddr(addr, sizeof(addr),
796 &sock);
797 dbgtext( "bind failed on port %d ", port);
798 dbgtext( "socket_addr = %s.\n", addr);
799 dbgtext( "Error = %s\n", strerror(errno));
800 }
801 close(res);
802 return -1;
803 }
804
805 DEBUG( 10, ( "bind succeeded on port %d\n", port ) );
806 return( res );
807 }
808
809 struct open_socket_out_state {
810 int fd;
811 struct event_context *ev;
812 struct sockaddr_storage ss;
813 socklen_t salen;
814 uint16_t port;
815 int wait_nsec;
816 };
817
818 static void open_socket_out_connected(struct tevent_req *subreq);
819
820 static int open_socket_out_state_destructor(struct open_socket_out_state *s)
821 {
822 if (s->fd != -1) {
823 close(s->fd);
824 }
825 return 0;
826 }
827
828 /****************************************************************************
829 Create an outgoing socket. timeout is in milliseconds.
830 **************************************************************************/
831
832 struct tevent_req *open_socket_out_send(TALLOC_CTX *mem_ctx,
833 struct event_context *ev,
834 const struct sockaddr_storage *pss,
835 uint16_t port,
836 int timeout)
837 {
838 char addr[INET6_ADDRSTRLEN];
839 struct tevent_req *result, *subreq;
840 struct open_socket_out_state *state;
841 NTSTATUS status;
842
843 result = tevent_req_create(mem_ctx, &state,
844 struct open_socket_out_state);
845 if (result == NULL) {
846 return NULL;
847 }
848 state->ev = ev;
849 state->ss = *pss;
850 state->port = port;
851 state->wait_nsec = 10000;
852 state->salen = -1;
853
854 state->fd = socket(state->ss.ss_family, SOCK_STREAM, 0);
855 if (state->fd == -1) {
856 status = map_nt_error_from_unix(errno);
857 goto post_status;
858 }
859 talloc_set_destructor(state, open_socket_out_state_destructor);
860
861 if (!tevent_req_set_endtime(
862 result, ev, timeval_current_ofs(0, timeout*1000))) {
863 goto fail;
864 }
865
866 #if defined(HAVE_IPV6)
867 if (pss->ss_family == AF_INET6) {
868 struct sockaddr_in6 *psa6;
869 psa6 = (struct sockaddr_in6 *)&state->ss;
870 psa6->sin6_port = htons(port);
871 if (psa6->sin6_scope_id == 0
872 && IN6_IS_ADDR_LINKLOCAL(&psa6->sin6_addr)) {
873 setup_linklocal_scope_id(
874 (struct sockaddr *)&(state->ss));
875 }
876 state->salen = sizeof(struct sockaddr_in6);
877 }
878 #endif
879 if (pss->ss_family == AF_INET) {
880 struct sockaddr_in *psa;
881 psa = (struct sockaddr_in *)&state->ss;
882 psa->sin_port = htons(port);
883 state->salen = sizeof(struct sockaddr_in);
884 }
885
886 if (pss->ss_family == AF_UNIX) {
887 state->salen = sizeof(struct sockaddr_un);
888 }
889
890 print_sockaddr(addr, sizeof(addr), &state->ss);
891 DEBUG(3,("Connecting to %s at port %u\n", addr, (unsigned int)port));
892
893 subreq = async_connect_send(state, state->ev, state->fd,
894 (struct sockaddr *)&state->ss,
895 state->salen);
896 if ((subreq == NULL)
897 || !tevent_req_set_endtime(
898 subreq, state->ev,
899 timeval_current_ofs(0, state->wait_nsec))) {
900 goto fail;
901 }
902 tevent_req_set_callback(subreq, open_socket_out_connected, result);
903 return result;
904
905 post_status:
906 tevent_req_nterror(result, status);
907 return tevent_req_post(result, ev);
908 fail:
909 TALLOC_FREE(result);
910 return NULL;
911 }
912
913 static void open_socket_out_connected(struct tevent_req *subreq)
914 {
915 struct tevent_req *req =
916 tevent_req_callback_data(subreq, struct tevent_req);
917 struct open_socket_out_state *state =
918 tevent_req_data(req, struct open_socket_out_state);
919 int ret;
920 int sys_errno;
921
922 ret = async_connect_recv(subreq, &sys_errno);
923 TALLOC_FREE(subreq);
924 if (ret == 0) {
925 tevent_req_done(req);
926 return;
927 }
928
929 if (
930 #ifdef ETIMEDOUT
931 (sys_errno == ETIMEDOUT) ||
932 #endif
933 (sys_errno == EINPROGRESS) ||
934 (sys_errno == EALREADY) ||
935 (sys_errno == EAGAIN)) {
936
937 /*
938 * retry
939 */
940
941 if (state->wait_nsec < 250000) {
942 state->wait_nsec *= 1.5;
943 }
944
945 subreq = async_connect_send(state, state->ev, state->fd,
946 (struct sockaddr *)&state->ss,
947 state->salen);
948 if (tevent_req_nomem(subreq, req)) {
949 return;
950 }
951 if (!tevent_req_set_endtime(
952 subreq, state->ev,
953 timeval_current_ofs(0, state->wait_nsec))) {
954 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
955 return;
956 }
957 tevent_req_set_callback(subreq, open_socket_out_connected, req);
958 return;
959 }
960
961 #ifdef EISCONN
962 if (sys_errno == EISCONN) {
963 tevent_req_done(req);
964 return;
965 }
966 #endif
967
968 /* real error */
969 tevent_req_nterror(req, map_nt_error_from_unix(sys_errno));
970 }
971
972 NTSTATUS open_socket_out_recv(struct tevent_req *req, int *pfd)
973 {
974 struct open_socket_out_state *state =
975 tevent_req_data(req, struct open_socket_out_state);
976 NTSTATUS status;
977
978 if (tevent_req_is_nterror(req, &status)) {
979 return status;
980 }
981 *pfd = state->fd;
982 state->fd = -1;
983 return NT_STATUS_OK;
984 }
985
986 NTSTATUS open_socket_out(const struct sockaddr_storage *pss, uint16_t port,
987 int timeout, int *pfd)
988 {
989 TALLOC_CTX *frame = talloc_stackframe();
990 struct event_context *ev;
991 struct tevent_req *req;
992 NTSTATUS status = NT_STATUS_NO_MEMORY;
993
994 ev = event_context_init(frame);
995 if (ev == NULL) {
996 goto fail;
997 }
998
999 req = open_socket_out_send(frame, ev, pss, port, timeout);
1000 if (req == NULL) {
1001 goto fail;
1002 }
1003 if (!tevent_req_poll(req, ev)) {
1004 status = NT_STATUS_INTERNAL_ERROR;
1005 goto fail;
1006 }
1007 status = open_socket_out_recv(req, pfd);
1008 fail:
1009 TALLOC_FREE(frame);
1010 return status;
1011 }
1012
1013 struct open_socket_out_defer_state {
1014 struct event_context *ev;
1015 struct sockaddr_storage ss;
1016 uint16_t port;
1017 int timeout;
1018 int fd;
1019 };
1020
1021 static void open_socket_out_defer_waited(struct tevent_req *subreq);
1022 static void open_socket_out_defer_connected(struct tevent_req *subreq);
1023
1024 struct tevent_req *open_socket_out_defer_send(TALLOC_CTX *mem_ctx,
1025 struct event_context *ev,
1026 struct timeval wait_time,
1027 const struct sockaddr_storage *pss,
1028 uint16_t port,
1029 int timeout)
1030 {
1031 struct tevent_req *req, *subreq;
1032 struct open_socket_out_defer_state *state;
1033
1034 req = tevent_req_create(mem_ctx, &state,
1035 struct open_socket_out_defer_state);
1036 if (req == NULL) {
1037 return NULL;
1038 }
1039 state->ev = ev;
1040 state->ss = *pss;
1041 state->port = port;
1042 state->timeout = timeout;
1043
1044 subreq = tevent_wakeup_send(
1045 state, ev,
1046 timeval_current_ofs(wait_time.tv_sec, wait_time.tv_usec));
1047 if (subreq == NULL) {
1048 goto fail;
1049 }
1050 tevent_req_set_callback(subreq, open_socket_out_defer_waited, req);
1051 return req;
1052 fail:
1053 TALLOC_FREE(req);
1054 return NULL;
1055 }
1056
1057 static void open_socket_out_defer_waited(struct tevent_req *subreq)
1058 {
1059 struct tevent_req *req = tevent_req_callback_data(
1060 subreq, struct tevent_req);
1061 struct open_socket_out_defer_state *state = tevent_req_data(
1062 req, struct open_socket_out_defer_state);
1063 bool ret;
1064
1065 ret = tevent_wakeup_recv(subreq);
1066 TALLOC_FREE(subreq);
1067 if (!ret) {
1068 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1069 return;
1070 }
1071
1072 subreq = open_socket_out_send(state, state->ev, &state->ss,
1073 state->port, state->timeout);
1074 if (tevent_req_nomem(subreq, req)) {
1075 return;
1076 }
1077 tevent_req_set_callback(subreq, open_socket_out_defer_connected, req);
1078 }
1079
1080 static void open_socket_out_defer_connected(struct tevent_req *subreq)
1081 {
1082 struct tevent_req *req = tevent_req_callback_data(
1083 subreq, struct tevent_req);
1084 struct open_socket_out_defer_state *state = tevent_req_data(
1085 req, struct open_socket_out_defer_state);
1086 NTSTATUS status;
1087
1088 status = open_socket_out_recv(subreq, &state->fd);
1089 TALLOC_FREE(subreq);
1090 if (!NT_STATUS_IS_OK(status)) {
1091 tevent_req_nterror(req, status);
1092 return;
1093 }
1094 tevent_req_done(req);
1095 }
1096
1097 NTSTATUS open_socket_out_defer_recv(struct tevent_req *req, int *pfd)
1098 {
1099 struct open_socket_out_defer_state *state = tevent_req_data(
1100 req, struct open_socket_out_defer_state);
1101 NTSTATUS status;
1102
1103 if (tevent_req_is_nterror(req, &status)) {
1104 return status;
1105 }
1106 *pfd = state->fd;
1107 state->fd = -1;
1108 return NT_STATUS_OK;
1109 }
1110
1111 /****************************************************************************
1112 Open a connected UDP socket to host on port
1113 **************************************************************************/
1114
1115 int open_udp_socket(const char *host, int port)
1116 {
1117 struct sockaddr_storage ss;
1118 int res;
1119
1120 if (!interpret_string_addr(&ss, host, 0)) {
1121 DEBUG(10,("open_udp_socket: can't resolve name %s\n",
1122 host));
1123 return -1;
1124 }
1125
1126 res = socket(ss.ss_family, SOCK_DGRAM, 0);
1127 if (res == -1) {
1128 return -1;
1129 }
1130
1131 #if defined(HAVE_IPV6)
1132 if (ss.ss_family == AF_INET6) {
1133 struct sockaddr_in6 *psa6;
1134 psa6 = (struct sockaddr_in6 *)&ss;
1135 psa6->sin6_port = htons(port);
1136 if (psa6->sin6_scope_id == 0
1137 && IN6_IS_ADDR_LINKLOCAL(&psa6->sin6_addr)) {
1138 setup_linklocal_scope_id(
1139 (struct sockaddr *)&ss);
1140 }
1141 }
1142 #endif
1143 if (ss.ss_family == AF_INET) {
1144 struct sockaddr_in *psa;
1145 psa = (struct sockaddr_in *)&ss;
1146 psa->sin_port = htons(port);
1147 }
1148
1149 if (sys_connect(res,(struct sockaddr *)&ss)) {
1150 close(res);
1151 return -1;
1152 }
1153
1154 return res;
1155 }
1156
1157 /*******************************************************************
1158 Return the IP addr of the remote end of a socket as a string.
1159 Optionally return the struct sockaddr_storage.
1160 ******************************************************************/
1161
1162 static const char *get_peer_addr_internal(int fd,
1163 char *addr_buf,
1164 size_t addr_buf_len,
1165 struct sockaddr *pss,
1166 socklen_t *plength)
1167 {
1168 struct sockaddr_storage ss;
1169 socklen_t length = sizeof(ss);
1170
1171 strlcpy(addr_buf,"0.0.0.0",addr_buf_len);
1172
1173 if (fd == -1) {
1174 return addr_buf;
1175 }
1176
1177 if (pss == NULL) {
1178 pss = (struct sockaddr *)&ss;
1179 plength = &length;
1180 }
1181
1182 if (getpeername(fd, (struct sockaddr *)pss, plength) < 0) {
1183 int level = (errno == ENOTCONN) ? 2 : 0;
1184 DEBUG(level, ("getpeername failed. Error was %s\n",
1185 strerror(errno)));
1186 return addr_buf;
1187 }
1188
1189 print_sockaddr_len(addr_buf,
1190 addr_buf_len,
1191 pss,
1192 *plength);
1193 return addr_buf;
1194 }
1195
1196 /*******************************************************************
1197 Matchname - determine if host name matches IP address. Used to
1198 confirm a hostname lookup to prevent spoof attacks.
1199 ******************************************************************/
1200
1201 static bool matchname(const char *remotehost,
1202 const struct sockaddr *pss,
1203 socklen_t len)
1204 {
1205 struct addrinfo *res = NULL;
1206 struct addrinfo *ailist = NULL;
1207 char addr_buf[INET6_ADDRSTRLEN];
1208 bool ret = interpret_string_addr_internal(&ailist,
1209 remotehost,
1210 AI_ADDRCONFIG|AI_CANONNAME);
1211
1212 if (!ret || ailist == NULL) {
1213 DEBUG(3,("matchname: getaddrinfo failed for "
1214 "name %s [%s]\n",
1215 remotehost,
1216 gai_strerror(ret) ));
1217 return false;
1218 }
1219
1220 /*
1221 * Make sure that getaddrinfo() returns the "correct" host name.
1222 */
1223
1224 if (ailist->ai_canonname == NULL ||
1225 (!strequal(remotehost, ailist->ai_canonname) &&
1226 !strequal(remotehost, "localhost"))) {
1227 DEBUG(0,("matchname: host name/name mismatch: %s != %s\n",
1228 remotehost,
1229 ailist->ai_canonname ?
1230 ailist->ai_canonname : "(NULL)"));
1231 freeaddrinfo(ailist);
1232 return false;
1233 }
1234
1235 /* Look up the host address in the address list we just got. */
1236 for (res = ailist; res; res = res->ai_next) {
1237 if (!res->ai_addr) {
1238 continue;
1239 }
1240 if (sockaddr_equal((const struct sockaddr *)res->ai_addr,
1241 (struct sockaddr *)pss)) {
1242 freeaddrinfo(ailist);
1243 return true;
1244 }
1245 }
1246
1247 /*
1248 * The host name does not map to the original host address. Perhaps
1249 * someone has compromised a name server. More likely someone botched
1250 * it, but that could be dangerous, too.
1251 */
1252
1253 DEBUG(0,("matchname: host name/address mismatch: %s != %s\n",
1254 print_sockaddr_len(addr_buf,
1255 sizeof(addr_buf),
1256 pss,
1257 len),
1258 ailist->ai_canonname ? ailist->ai_canonname : "(NULL)"));
1259
1260 if (ailist) {
1261 freeaddrinfo(ailist);
1262 }
1263 return false;
1264 }
1265
1266 /*******************************************************************
1267 Deal with the singleton cache.
1268 ******************************************************************/
1269
1270 struct name_addr_pair {
1271 struct sockaddr_storage ss;
1272 const char *name;
1273 };
1274
1275 /*******************************************************************
1276 Lookup a name/addr pair. Returns memory allocated from memcache.
1277 ******************************************************************/
1278
1279 static bool lookup_nc(struct name_addr_pair *nc)
1280 {
1281 DATA_BLOB tmp;
1282
1283 ZERO_STRUCTP(nc);
1284
1285 if (!memcache_lookup(
1286 NULL, SINGLETON_CACHE,
1287 data_blob_string_const_null("get_peer_name"),
1288 &tmp)) {
1289 return false;
1290 }
1291
1292 memcpy(&nc->ss, tmp.data, sizeof(nc->ss));
1293 nc->name = (const char *)tmp.data + sizeof(nc->ss);
1294 return true;
1295 }
1296
1297 /*******************************************************************
1298 Save a name/addr pair.
1299 ******************************************************************/
1300
1301 static void store_nc(const struct name_addr_pair *nc)
1302 {
1303 DATA_BLOB tmp;
1304 size_t namelen = strlen(nc->name);
1305
1306 tmp = data_blob(NULL, sizeof(nc->ss) + namelen + 1);
1307 if (!tmp.data) {
1308 return;
1309 }
1310 memcpy(tmp.data, &nc->ss, sizeof(nc->ss));
1311 memcpy(tmp.data+sizeof(nc->ss), nc->name, namelen+1);
1312
1313 memcache_add(NULL, SINGLETON_CACHE,
1314 data_blob_string_const_null("get_peer_name"),
1315 tmp);
1316 data_blob_free(&tmp);
1317 }
1318
1319 /*******************************************************************
1320 Return the DNS name of the remote end of a socket.
1321 ******************************************************************/
1322
1323 const char *get_peer_name(int fd, bool force_lookup)
1324 {
1325 struct name_addr_pair nc;
1326 char addr_buf[INET6_ADDRSTRLEN];
1327 struct sockaddr_storage ss;
1328 socklen_t length = sizeof(ss);
1329 const char *p;
1330 int ret;
1331 char name_buf[MAX_DNS_NAME_LENGTH];
1332 char tmp_name[MAX_DNS_NAME_LENGTH];
1333
1334 /* reverse lookups can be *very* expensive, and in many
1335 situations won't work because many networks don't link dhcp
1336 with dns. To avoid the delay we avoid the lookup if
1337 possible */
1338 if (!lp_hostname_lookups() && (force_lookup == false)) {
1339 length = sizeof(nc.ss);
1340 nc.name = get_peer_addr_internal(fd, addr_buf, sizeof(addr_buf),
1341 (struct sockaddr *)&nc.ss, &length);
1342 store_nc(&nc);
1343 lookup_nc(&nc);
1344 return nc.name ? nc.name : "UNKNOWN";
1345 }
1346
1347 lookup_nc(&nc);
1348
1349 memset(&ss, '\0', sizeof(ss));
1350 p = get_peer_addr_internal(fd, addr_buf, sizeof(addr_buf), (struct sockaddr *)&ss, &length);
1351
1352 /* it might be the same as the last one - save some DNS work */
1353 if (sockaddr_equal((struct sockaddr *)&ss, (struct sockaddr *)&nc.ss)) {
1354 return nc.name ? nc.name : "UNKNOWN";
1355 }
1356
1357 /* Not the same. We need to lookup. */
1358 if (fd == -1) {
1359 return "UNKNOWN";
1360 }
1361
1362 /* Look up the remote host name. */
1363 ret = sys_getnameinfo((struct sockaddr *)&ss,
1364 length,
1365 name_buf,
1366 sizeof(name_buf),
1367 NULL,
1368 0,
1369 0);
1370
1371 if (ret) {
1372 DEBUG(1,("get_peer_name: getnameinfo failed "
1373 "for %s with error %s\n",
1374 p,
1375 gai_strerror(ret)));
1376 strlcpy(name_buf, p, sizeof(name_buf));
1377 } else {
1378 if (!matchname(name_buf, (struct sockaddr *)&ss, length)) {
1379 DEBUG(0,("Matchname failed on %s %s\n",name_buf,p));
1380 strlcpy(name_buf,"UNKNOWN",sizeof(name_buf));
1381 }
1382 }
1383
1384 strlcpy(tmp_name, name_buf, sizeof(tmp_name));
1385 alpha_strcpy(name_buf, tmp_name, "_-.", sizeof(name_buf));
1386 if (strstr(name_buf,"..")) {
1387 strlcpy(name_buf, "UNKNOWN", sizeof(name_buf));
1388 }
1389
1390 nc.name = name_buf;
1391 nc.ss = ss;
1392
1393 store_nc(&nc);
1394 lookup_nc(&nc);
1395 return nc.name ? nc.name : "UNKNOWN";
1396 }
1397
1398 /*******************************************************************
1399 Return the IP addr of the remote end of a socket as a string.
1400 ******************************************************************/
1401
1402 const char *get_peer_addr(int fd, char *addr, size_t addr_len)
1403 {
1404 return get_peer_addr_internal(fd, addr, addr_len, NULL, NULL);
1405 }
1406
1407 /*******************************************************************
1408 Create protected unix domain socket.
1409
1410 Some unixes cannot set permissions on a ux-dom-sock, so we
1411 have to make sure that the directory contains the protection
1412 permissions instead.
1413 ******************************************************************/
1414
1415 int create_pipe_sock(const char *socket_dir,
1416 const char *socket_name,
1417 mode_t dir_perms)
1418 {
1419 #ifdef HAVE_UNIXSOCKET
1420 struct sockaddr_un sunaddr;
1421 struct stat st;
1422 int sock;
1423 mode_t old_umask;
1424 char *path = NULL;
1425
1426 old_umask = umask(0);
1427
1428 /* Create the socket directory or reuse the existing one */
1429
1430 if (lstat(socket_dir, &st) == -1) {
1431 if (errno == ENOENT) {
1432 /* Create directory */
1433 if (mkdir(socket_dir, dir_perms) == -1) {
1434 DEBUG(0, ("error creating socket directory "
1435 "%s: %s\n", socket_dir,
1436 strerror(errno)));
1437 goto out_umask;
1438 }
1439 } else {
1440 DEBUG(0, ("lstat failed on socket directory %s: %s\n",
1441 socket_dir, strerror(errno)));
1442 goto out_umask;
1443 }
1444 } else {
1445 /* Check ownership and permission on existing directory */
1446 if (!S_ISDIR(st.st_mode)) {
1447 DEBUG(0, ("socket directory %s isn't a directory\n",
1448 socket_dir));
1449 goto out_umask;
1450 }
1451 if ((st.st_uid != sec_initial_uid()) ||
1452 ((st.st_mode & 0777) != dir_perms)) {
1453 DEBUG(0, ("invalid permissions on socket directory "
1454 "%s\n", socket_dir));
1455 goto out_umask;
1456 }
1457 }
1458
1459 /* Create the socket file */
1460
1461 sock = socket(AF_UNIX, SOCK_STREAM, 0);
1462
1463 if (sock == -1) {
1464 DEBUG(0, ("create_pipe_sock: socket error %s\n",
1465 strerror(errno) ));
1466 goto out_close;
1467 }
1468
1469 if (asprintf(&path, "%s/%s", socket_dir, socket_name) == -1) {
1470 goto out_close;
1471 }
1472
1473 unlink(path);
1474 memset(&sunaddr, 0, sizeof(sunaddr));
1475 sunaddr.sun_family = AF_UNIX;
1476 strlcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path));
1477
1478 if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1) {
1479 DEBUG(0, ("bind failed on pipe socket %s: %s\n", path,
1480 strerror(errno)));
1481 goto out_close;
1482 }
1483
1484 if (listen(sock, 5) == -1) {
1485 DEBUG(0, ("listen failed on pipe socket %s: %s\n", path,
1486 strerror(errno)));
1487 goto out_close;
1488 }
1489
1490 SAFE_FREE(path);
1491
1492 umask(old_umask);
1493 return sock;
1494
1495 out_close:
1496 SAFE_FREE(path);
1497 if (sock != -1)
1498 close(sock);
1499
1500 out_umask:
1501 umask(old_umask);
1502 return -1;
1503
1504 #else
1505 DEBUG(0, ("create_pipe_sock: No Unix sockets on this system\n"));
1506 return -1;
1507 #endif /* HAVE_UNIXSOCKET */
1508 }
1509
1510 /****************************************************************************
1511 Get my own canonical name, including domain.
1512 ****************************************************************************/
1513
1514 const char *get_mydnsfullname(void)
1515 {
1516 struct addrinfo *res = NULL;
1517 char my_hostname[HOST_NAME_MAX];
1518 bool ret;
1519 DATA_BLOB tmp;
1520
1521 if (memcache_lookup(NULL, SINGLETON_CACHE,
1522 data_blob_string_const_null("get_mydnsfullname"),
1523 &tmp)) {
1524 SMB_ASSERT(tmp.length > 0);
1525 return (const char *)tmp.data;
1526 }
1527
1528 /* get my host name */
1529 if (gethostname(my_hostname, sizeof(my_hostname)) == -1) {
1530 DEBUG(0,("get_mydnsfullname: gethostname failed\n"));
1531 return NULL;
1532 }
1533
1534 /* Ensure null termination. */
1535 my_hostname[sizeof(my_hostname)-1] = '\0';
1536
1537 ret = interpret_string_addr_internal(&res,
1538 my_hostname,
1539 AI_ADDRCONFIG|AI_CANONNAME);
1540
1541 if (!ret || res == NULL) {
1542 DEBUG(3,("get_mydnsfullname: getaddrinfo failed for "
1543 "name %s [%s]\n",
1544 my_hostname,
1545 gai_strerror(ret) ));
1546 return NULL;
1547 }
1548
1549 /*
1550 * Make sure that getaddrinfo() returns the "correct" host name.
1551 */
1552
1553 if (res->ai_canonname == NULL) {
1554 DEBUG(3,("get_mydnsfullname: failed to get "
1555 "canonical name for %s\n",
1556 my_hostname));
1557 freeaddrinfo(res);
1558 return NULL;
1559 }
1560
1561 /* This copies the data, so we must do a lookup
1562 * afterwards to find the value to return.
1563 */
1564
1565 memcache_add(NULL, SINGLETON_CACHE,
1566 data_blob_string_const_null("get_mydnsfullname"),
1567 data_blob_string_const_null(res->ai_canonname));
1568
1569 if (!memcache_lookup(NULL, SINGLETON_CACHE,
1570 data_blob_string_const_null("get_mydnsfullname"),
1571 &tmp)) {
1572 tmp = data_blob_talloc(talloc_tos(), res->ai_canonname,
1573 strlen(res->ai_canonname) + 1);
1574 }
1575
1576 freeaddrinfo(res);
1577
1578 return (const char *)tmp.data;
1579 }
1580
1581 /************************************************************
1582 Is this my ip address ?
1583 ************************************************************/
1584
1585 static bool is_my_ipaddr(const char *ipaddr_str)
1586 {
1587 struct sockaddr_storage ss;
1588 struct iface_struct *nics;
1589 int i, n;
1590
1591 if (!interpret_string_addr(&ss, ipaddr_str, AI_NUMERICHOST)) {
1592 return false;
1593 }
1594
1595 if (ismyaddr((struct sockaddr *)&ss)) {
1596 return true;
1597 }
1598
1599 if (is_zero_addr(&ss) ||
1600 is_loopback_addr((struct sockaddr *)&ss)) {
1601 return false;
1602 }
1603
1604 n = get_interfaces(talloc_tos(), &nics);
1605 for (i=0; i<n; i++) {
1606 if (sockaddr_equal((struct sockaddr *)&nics[i].ip, (struct sockaddr *)&ss)) {
1607 TALLOC_FREE(nics);
1608 return true;
1609 }
1610 }
1611 TALLOC_FREE(nics);
1612 return false;
1613 }
1614
1615 /************************************************************
1616 Is this my name ?
1617 ************************************************************/
1618
1619 bool is_myname_or_ipaddr(const char *s)
1620 {
1621 TALLOC_CTX *ctx = talloc_tos();
1622 char *name = NULL;
1623 const char *dnsname;
1624 char *servername = NULL;
1625
1626 if (!s) {
1627 return false;
1628 }
1629
1630 /* Santize the string from '\\name' */
1631 name = talloc_strdup(ctx, s);
1632 if (!name) {
1633 return false;
1634 }
1635
1636 servername = strrchr_m(name, '\\' );
1637 if (!servername) {
1638 servername = name;
1639 } else {
1640 servername++;
1641 }
1642
1643 /* Optimize for the common case */
1644 if (strequal(servername, global_myname())) {
1645 return true;
1646 }
1647
1648 /* Check for an alias */
1649 if (is_myname(servername)) {
1650 return true;
1651 }
1652
1653 /* Check for loopback */
1654 if (strequal(servername, "127.0.0.1") ||
1655 strequal(servername, "::1")) {
1656 return true;
1657 }
1658
1659 if (strequal(servername, "localhost")) {
1660 return true;
1661 }
1662
1663 /* Maybe it's my dns name */
1664 dnsname = get_mydnsfullname();
1665 if (dnsname && strequal(servername, dnsname)) {
1666 return true;
1667 }
1668
1669 /* Maybe its an IP address? */
1670 if (is_ipaddress(servername)) {
1671 return is_my_ipaddr(servername);
1672 }
1673
1674 /* Handle possible CNAME records - convert to an IP addr. list. */
1675 {
1676 /* Use DNS to resolve the name, check all addresses. */
1677 struct addrinfo *p = NULL;
1678 struct addrinfo *res = NULL;
1679
1680 if (!interpret_string_addr_internal(&res,
1681 servername,
1682 AI_ADDRCONFIG)) {
1683 return false;
1684 }
1685
1686 for (p = res; p; p = p->ai_next) {
1687 char addr[INET6_ADDRSTRLEN];
1688 struct sockaddr_storage ss;
1689
1690 ZERO_STRUCT(ss);
1691 memcpy(&ss, p->ai_addr, p->ai_addrlen);
1692 print_sockaddr(addr,
1693 sizeof(addr),
1694 &ss);
1695 if (is_my_ipaddr(addr)) {
1696 freeaddrinfo(res);
1697 return true;
1698 }
1699 }
1700 freeaddrinfo(res);
1701 }
1702
1703 /* No match */
1704 return false;
1705 }
1706
1707 struct getaddrinfo_state {
1708 const char *node;
1709 const char *service;
1710 const struct addrinfo *hints;
1711 struct addrinfo *res;
1712 int ret;
1713 };
1714
1715 static void getaddrinfo_do(void *private_data);
1716 static void getaddrinfo_done(struct tevent_req *subreq);
1717
1718 struct tevent_req *getaddrinfo_send(TALLOC_CTX *mem_ctx,
1719 struct tevent_context *ev,
1720 struct fncall_context *ctx,
1721 const char *node,
1722 const char *service,
1723 const struct addrinfo *hints)
1724 {
1725 struct tevent_req *req, *subreq;
1726 struct getaddrinfo_state *state;
1727
1728 req = tevent_req_create(mem_ctx, &state, struct getaddrinfo_state);
1729 if (req == NULL) {
1730 return NULL;
1731 }
1732
1733 state->node = node;
1734 state->service = service;
1735 state->hints = hints;
1736
1737 subreq = fncall_send(state, ev, ctx, getaddrinfo_do, state);
1738 if (tevent_req_nomem(subreq, req)) {
1739 return tevent_req_post(req, ev);
1740 }
1741 tevent_req_set_callback(subreq, getaddrinfo_done, req);
1742 return req;
1743 }
1744
1745 static void getaddrinfo_do(void *private_data)
1746 {
1747 struct getaddrinfo_state *state =
1748 (struct getaddrinfo_state *)private_data;
1749
1750 state->ret = getaddrinfo(state->node, state->service, state->hints,
1751 &state->res);
1752 }
1753
1754 static void getaddrinfo_done(struct tevent_req *subreq)
1755 {
1756 struct tevent_req *req = tevent_req_callback_data(
1757 subreq, struct tevent_req);
1758 int ret, err;
1759
1760 ret = fncall_recv(subreq, &err);
1761 TALLOC_FREE(subreq);
1762 if (ret == -1) {
1763 tevent_req_error(req, err);
1764 return;
1765 }
1766 tevent_req_done(req);
1767 }
1768
1769 int getaddrinfo_recv(struct tevent_req *req, struct addrinfo **res)
1770 {
1771 struct getaddrinfo_state *state = tevent_req_data(
1772 req, struct getaddrinfo_state);
1773 int err;
1774
1775 if (tevent_req_is_unix_error(req, &err)) {
1776 switch(err) {
1777 case ENOMEM:
1778 return EAI_MEMORY;
1779 default:
1780 return EAI_FAIL;
1781 }
1782 }
1783 if (state->ret == 0) {
1784 *res = state->res;
1785 }
1786 return state->ret;
1787 }
1788
1789 int poll_one_fd(int fd, int events, int timeout, int *revents)
1790 {
1791 struct pollfd *fds;
1792 int ret;
1793 int saved_errno;
1794
1795 fds = TALLOC_ZERO_ARRAY(talloc_tos(), struct pollfd, 2);
1796 if (fds == NULL) {
1797 errno = ENOMEM;
1798 return -1;
1799 }
1800 fds[0].fd = fd;
1801 fds[0].events = events;
1802
1803 ret = sys_poll(fds, 1, timeout);
1804
1805 /*
1806 * Assign whatever poll did, even in the ret<=0 case.
1807 */
1808 *revents = fds[0].revents;
1809 saved_errno = errno;
1810 TALLOC_FREE(fds);
1811 errno = saved_errno;
1812
1813 return ret;
1814 }
1815
1816 int poll_intr_one_fd(int fd, int events, int timeout, int *revents)
1817 {
1818 struct pollfd pfd;
1819 int ret;
1820
1821 pfd.fd = fd;
1822 pfd.events = events;
1823
1824 ret = sys_poll_intr(&pfd, 1, timeout);
1825 if (ret <= 0) {
1826 *revents = 0;
1827 return ret;
1828 }
1829 *revents = pfd.revents;
1830 return 1;
1831 }