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s3:smbd/trans2: make use of BVAL() and remove ugly LARGE_SMB_OFF_T ifdef's
[Samba.git] / source3 / lib / util_sock.c
blob787ad94957c2a02db8820375a5e85bcd051d2c32
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 /**
987 * @brief open a socket
988 *
989 * @param pss a struct sockaddr_storage defining the address to connect to
990 * @param port to connect to
991 * @param timeout in MILLISECONDS
992 * @param pfd file descriptor returned
993 *
994 * @return NTSTATUS code
995 */
996 NTSTATUS open_socket_out(const struct sockaddr_storage *pss, uint16_t port,
997 int timeout, int *pfd)
998 {
999 TALLOC_CTX *frame = talloc_stackframe();
1000 struct event_context *ev;
1001 struct tevent_req *req;
1002 NTSTATUS status = NT_STATUS_NO_MEMORY;
1003
1004 ev = event_context_init(frame);
1005 if (ev == NULL) {
1006 goto fail;
1007 }
1008
1009 req = open_socket_out_send(frame, ev, pss, port, timeout);
1010 if (req == NULL) {
1011 goto fail;
1012 }
1013 if (!tevent_req_poll(req, ev)) {
1014 status = NT_STATUS_INTERNAL_ERROR;
1015 goto fail;
1016 }
1017 status = open_socket_out_recv(req, pfd);
1018 fail:
1019 TALLOC_FREE(frame);
1020 return status;
1021 }
1022
1023 struct open_socket_out_defer_state {
1024 struct event_context *ev;
1025 struct sockaddr_storage ss;
1026 uint16_t port;
1027 int timeout;
1028 int fd;
1029 };
1030
1031 static void open_socket_out_defer_waited(struct tevent_req *subreq);
1032 static void open_socket_out_defer_connected(struct tevent_req *subreq);
1033
1034 struct tevent_req *open_socket_out_defer_send(TALLOC_CTX *mem_ctx,
1035 struct event_context *ev,
1036 struct timeval wait_time,
1037 const struct sockaddr_storage *pss,
1038 uint16_t port,
1039 int timeout)
1040 {
1041 struct tevent_req *req, *subreq;
1042 struct open_socket_out_defer_state *state;
1043
1044 req = tevent_req_create(mem_ctx, &state,
1045 struct open_socket_out_defer_state);
1046 if (req == NULL) {
1047 return NULL;
1048 }
1049 state->ev = ev;
1050 state->ss = *pss;
1051 state->port = port;
1052 state->timeout = timeout;
1053
1054 subreq = tevent_wakeup_send(
1055 state, ev,
1056 timeval_current_ofs(wait_time.tv_sec, wait_time.tv_usec));
1057 if (subreq == NULL) {
1058 goto fail;
1059 }
1060 tevent_req_set_callback(subreq, open_socket_out_defer_waited, req);
1061 return req;
1062 fail:
1063 TALLOC_FREE(req);
1064 return NULL;
1065 }
1066
1067 static void open_socket_out_defer_waited(struct tevent_req *subreq)
1068 {
1069 struct tevent_req *req = tevent_req_callback_data(
1070 subreq, struct tevent_req);
1071 struct open_socket_out_defer_state *state = tevent_req_data(
1072 req, struct open_socket_out_defer_state);
1073 bool ret;
1074
1075 ret = tevent_wakeup_recv(subreq);
1076 TALLOC_FREE(subreq);
1077 if (!ret) {
1078 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1079 return;
1080 }
1081
1082 subreq = open_socket_out_send(state, state->ev, &state->ss,
1083 state->port, state->timeout);
1084 if (tevent_req_nomem(subreq, req)) {
1085 return;
1086 }
1087 tevent_req_set_callback(subreq, open_socket_out_defer_connected, req);
1088 }
1089
1090 static void open_socket_out_defer_connected(struct tevent_req *subreq)
1091 {
1092 struct tevent_req *req = tevent_req_callback_data(
1093 subreq, struct tevent_req);
1094 struct open_socket_out_defer_state *state = tevent_req_data(
1095 req, struct open_socket_out_defer_state);
1096 NTSTATUS status;
1097
1098 status = open_socket_out_recv(subreq, &state->fd);
1099 TALLOC_FREE(subreq);
1100 if (!NT_STATUS_IS_OK(status)) {
1101 tevent_req_nterror(req, status);
1102 return;
1103 }
1104 tevent_req_done(req);
1105 }
1106
1107 NTSTATUS open_socket_out_defer_recv(struct tevent_req *req, int *pfd)
1108 {
1109 struct open_socket_out_defer_state *state = tevent_req_data(
1110 req, struct open_socket_out_defer_state);
1111 NTSTATUS status;
1112
1113 if (tevent_req_is_nterror(req, &status)) {
1114 return status;
1115 }
1116 *pfd = state->fd;
1117 state->fd = -1;
1118 return NT_STATUS_OK;
1119 }
1120
1121 /****************************************************************************
1122 Open a connected UDP socket to host on port
1123 **************************************************************************/
1124
1125 int open_udp_socket(const char *host, int port)
1126 {
1127 struct sockaddr_storage ss;
1128 int res;
1129
1130 if (!interpret_string_addr(&ss, host, 0)) {
1131 DEBUG(10,("open_udp_socket: can't resolve name %s\n",
1132 host));
1133 return -1;
1134 }
1135
1136 res = socket(ss.ss_family, SOCK_DGRAM, 0);
1137 if (res == -1) {
1138 return -1;
1139 }
1140
1141 #if defined(HAVE_IPV6)
1142 if (ss.ss_family == AF_INET6) {
1143 struct sockaddr_in6 *psa6;
1144 psa6 = (struct sockaddr_in6 *)&ss;
1145 psa6->sin6_port = htons(port);
1146 if (psa6->sin6_scope_id == 0
1147 && IN6_IS_ADDR_LINKLOCAL(&psa6->sin6_addr)) {
1148 setup_linklocal_scope_id(
1149 (struct sockaddr *)&ss);
1150 }
1151 }
1152 #endif
1153 if (ss.ss_family == AF_INET) {
1154 struct sockaddr_in *psa;
1155 psa = (struct sockaddr_in *)&ss;
1156 psa->sin_port = htons(port);
1157 }
1158
1159 if (sys_connect(res,(struct sockaddr *)&ss)) {
1160 close(res);
1161 return -1;
1162 }
1163
1164 return res;
1165 }
1166
1167 /*******************************************************************
1168 Return the IP addr of the remote end of a socket as a string.
1169 Optionally return the struct sockaddr_storage.
1170 ******************************************************************/
1171
1172 static const char *get_peer_addr_internal(int fd,
1173 char *addr_buf,
1174 size_t addr_buf_len,
1175 struct sockaddr *pss,
1176 socklen_t *plength)
1177 {
1178 struct sockaddr_storage ss;
1179 socklen_t length = sizeof(ss);
1180
1181 strlcpy(addr_buf,"0.0.0.0",addr_buf_len);
1182
1183 if (fd == -1) {
1184 return addr_buf;
1185 }
1186
1187 if (pss == NULL) {
1188 pss = (struct sockaddr *)&ss;
1189 plength = &length;
1190 }
1191
1192 if (getpeername(fd, (struct sockaddr *)pss, plength) < 0) {
1193 int level = (errno == ENOTCONN) ? 2 : 0;
1194 DEBUG(level, ("getpeername failed. Error was %s\n",
1195 strerror(errno)));
1196 return addr_buf;
1197 }
1198
1199 print_sockaddr_len(addr_buf,
1200 addr_buf_len,
1201 pss,
1202 *plength);
1203 return addr_buf;
1204 }
1205
1206 /*******************************************************************
1207 Matchname - determine if host name matches IP address. Used to
1208 confirm a hostname lookup to prevent spoof attacks.
1209 ******************************************************************/
1210
1211 static bool matchname(const char *remotehost,
1212 const struct sockaddr *pss,
1213 socklen_t len)
1214 {
1215 struct addrinfo *res = NULL;
1216 struct addrinfo *ailist = NULL;
1217 char addr_buf[INET6_ADDRSTRLEN];
1218 bool ret = interpret_string_addr_internal(&ailist,
1219 remotehost,
1220 AI_ADDRCONFIG|AI_CANONNAME);
1221
1222 if (!ret || ailist == NULL) {
1223 DEBUG(3,("matchname: getaddrinfo failed for "
1224 "name %s [%s]\n",
1225 remotehost,
1226 gai_strerror(ret) ));
1227 return false;
1228 }
1229
1230 /*
1231 * Make sure that getaddrinfo() returns the "correct" host name.
1232 */
1233
1234 if (ailist->ai_canonname == NULL ||
1235 (!strequal(remotehost, ailist->ai_canonname) &&
1236 !strequal(remotehost, "localhost"))) {
1237 DEBUG(0,("matchname: host name/name mismatch: %s != %s\n",
1238 remotehost,
1239 ailist->ai_canonname ?
1240 ailist->ai_canonname : "(NULL)"));
1241 freeaddrinfo(ailist);
1242 return false;
1243 }
1244
1245 /* Look up the host address in the address list we just got. */
1246 for (res = ailist; res; res = res->ai_next) {
1247 if (!res->ai_addr) {
1248 continue;
1249 }
1250 if (sockaddr_equal((const struct sockaddr *)res->ai_addr,
1251 (struct sockaddr *)pss)) {
1252 freeaddrinfo(ailist);
1253 return true;
1254 }
1255 }
1256
1257 /*
1258 * The host name does not map to the original host address. Perhaps
1259 * someone has compromised a name server. More likely someone botched
1260 * it, but that could be dangerous, too.
1261 */
1262
1263 DEBUG(0,("matchname: host name/address mismatch: %s != %s\n",
1264 print_sockaddr_len(addr_buf,
1265 sizeof(addr_buf),
1266 pss,
1267 len),
1268 ailist->ai_canonname ? ailist->ai_canonname : "(NULL)"));
1269
1270 if (ailist) {
1271 freeaddrinfo(ailist);
1272 }
1273 return false;
1274 }
1275
1276 /*******************************************************************
1277 Deal with the singleton cache.
1278 ******************************************************************/
1279
1280 struct name_addr_pair {
1281 struct sockaddr_storage ss;
1282 const char *name;
1283 };
1284
1285 /*******************************************************************
1286 Lookup a name/addr pair. Returns memory allocated from memcache.
1287 ******************************************************************/
1288
1289 static bool lookup_nc(struct name_addr_pair *nc)
1290 {
1291 DATA_BLOB tmp;
1292
1293 ZERO_STRUCTP(nc);
1294
1295 if (!memcache_lookup(
1296 NULL, SINGLETON_CACHE,
1297 data_blob_string_const_null("get_peer_name"),
1298 &tmp)) {
1299 return false;
1300 }
1301
1302 memcpy(&nc->ss, tmp.data, sizeof(nc->ss));
1303 nc->name = (const char *)tmp.data + sizeof(nc->ss);
1304 return true;
1305 }
1306
1307 /*******************************************************************
1308 Save a name/addr pair.
1309 ******************************************************************/
1310
1311 static void store_nc(const struct name_addr_pair *nc)
1312 {
1313 DATA_BLOB tmp;
1314 size_t namelen = strlen(nc->name);
1315
1316 tmp = data_blob(NULL, sizeof(nc->ss) + namelen + 1);
1317 if (!tmp.data) {
1318 return;
1319 }
1320 memcpy(tmp.data, &nc->ss, sizeof(nc->ss));
1321 memcpy(tmp.data+sizeof(nc->ss), nc->name, namelen+1);
1322
1323 memcache_add(NULL, SINGLETON_CACHE,
1324 data_blob_string_const_null("get_peer_name"),
1325 tmp);
1326 data_blob_free(&tmp);
1327 }
1328
1329 /*******************************************************************
1330 Return the DNS name of the remote end of a socket.
1331 ******************************************************************/
1332
1333 const char *get_peer_name(int fd, bool force_lookup)
1334 {
1335 struct name_addr_pair nc;
1336 char addr_buf[INET6_ADDRSTRLEN];
1337 struct sockaddr_storage ss;
1338 socklen_t length = sizeof(ss);
1339 const char *p;
1340 int ret;
1341 char name_buf[MAX_DNS_NAME_LENGTH];
1342 char tmp_name[MAX_DNS_NAME_LENGTH];
1343
1344 /* reverse lookups can be *very* expensive, and in many
1345 situations won't work because many networks don't link dhcp
1346 with dns. To avoid the delay we avoid the lookup if
1347 possible */
1348 if (!lp_hostname_lookups() && (force_lookup == false)) {
1349 length = sizeof(nc.ss);
1350 nc.name = get_peer_addr_internal(fd, addr_buf, sizeof(addr_buf),
1351 (struct sockaddr *)&nc.ss, &length);
1352 store_nc(&nc);
1353 lookup_nc(&nc);
1354 return nc.name ? nc.name : "UNKNOWN";
1355 }
1356
1357 lookup_nc(&nc);
1358
1359 memset(&ss, '\0', sizeof(ss));
1360 p = get_peer_addr_internal(fd, addr_buf, sizeof(addr_buf), (struct sockaddr *)&ss, &length);
1361
1362 /* it might be the same as the last one - save some DNS work */
1363 if (sockaddr_equal((struct sockaddr *)&ss, (struct sockaddr *)&nc.ss)) {
1364 return nc.name ? nc.name : "UNKNOWN";
1365 }
1366
1367 /* Not the same. We need to lookup. */
1368 if (fd == -1) {
1369 return "UNKNOWN";
1370 }
1371
1372 /* Look up the remote host name. */
1373 ret = sys_getnameinfo((struct sockaddr *)&ss,
1374 length,
1375 name_buf,
1376 sizeof(name_buf),
1377 NULL,
1378 0,
1379 0);
1380
1381 if (ret) {
1382 DEBUG(1,("get_peer_name: getnameinfo failed "
1383 "for %s with error %s\n",
1384 p,
1385 gai_strerror(ret)));
1386 strlcpy(name_buf, p, sizeof(name_buf));
1387 } else {
1388 if (!matchname(name_buf, (struct sockaddr *)&ss, length)) {
1389 DEBUG(0,("Matchname failed on %s %s\n",name_buf,p));
1390 strlcpy(name_buf,"UNKNOWN",sizeof(name_buf));
1391 }
1392 }
1393
1394 /* can't pass the same source and dest strings in when you
1395 use --enable-developer or the clobber_region() call will
1396 get you */
1397
1398 strlcpy(tmp_name, name_buf, sizeof(tmp_name));
1399 alpha_strcpy(name_buf, tmp_name, "_-.", sizeof(name_buf));
1400 if (strstr(name_buf,"..")) {
1401 strlcpy(name_buf, "UNKNOWN", sizeof(name_buf));
1402 }
1403
1404 nc.name = name_buf;
1405 nc.ss = ss;
1406
1407 store_nc(&nc);
1408 lookup_nc(&nc);
1409 return nc.name ? nc.name : "UNKNOWN";
1410 }
1411
1412 /*******************************************************************
1413 Return the IP addr of the remote end of a socket as a string.
1414 ******************************************************************/
1415
1416 const char *get_peer_addr(int fd, char *addr, size_t addr_len)
1417 {
1418 return get_peer_addr_internal(fd, addr, addr_len, NULL, NULL);
1419 }
1420
1421 /*******************************************************************
1422 Create protected unix domain socket.
1423
1424 Some unixes cannot set permissions on a ux-dom-sock, so we
1425 have to make sure that the directory contains the protection
1426 permissions instead.
1427 ******************************************************************/
1428
1429 int create_pipe_sock(const char *socket_dir,
1430 const char *socket_name,
1431 mode_t dir_perms)
1432 {
1433 #ifdef HAVE_UNIXSOCKET
1434 struct sockaddr_un sunaddr;
1435 struct stat st;
1436 int sock;
1437 mode_t old_umask;
1438 char *path = NULL;
1439
1440 old_umask = umask(0);
1441
1442 /* Create the socket directory or reuse the existing one */
1443
1444 if (lstat(socket_dir, &st) == -1) {
1445 if (errno == ENOENT) {
1446 /* Create directory */
1447 if (mkdir(socket_dir, dir_perms) == -1) {
1448 DEBUG(0, ("error creating socket directory "
1449 "%s: %s\n", socket_dir,
1450 strerror(errno)));
1451 goto out_umask;
1452 }
1453 } else {
1454 DEBUG(0, ("lstat failed on socket directory %s: %s\n",
1455 socket_dir, strerror(errno)));
1456 goto out_umask;
1457 }
1458 } else {
1459 /* Check ownership and permission on existing directory */
1460 if (!S_ISDIR(st.st_mode)) {
1461 DEBUG(0, ("socket directory %s isn't a directory\n",
1462 socket_dir));
1463 goto out_umask;
1464 }
1465 if ((st.st_uid != sec_initial_uid()) ||
1466 ((st.st_mode & 0777) != dir_perms)) {
1467 DEBUG(0, ("invalid permissions on socket directory "
1468 "%s\n", socket_dir));
1469 goto out_umask;
1470 }
1471 }
1472
1473 /* Create the socket file */
1474
1475 sock = socket(AF_UNIX, SOCK_STREAM, 0);
1476
1477 if (sock == -1) {
1478 DEBUG(0, ("create_pipe_sock: socket error %s\n",
1479 strerror(errno) ));
1480 goto out_close;
1481 }
1482
1483 if (asprintf(&path, "%s/%s", socket_dir, socket_name) == -1) {
1484 goto out_close;
1485 }
1486
1487 unlink(path);
1488 memset(&sunaddr, 0, sizeof(sunaddr));
1489 sunaddr.sun_family = AF_UNIX;
1490 strlcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path));
1491
1492 if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1) {
1493 DEBUG(0, ("bind failed on pipe socket %s: %s\n", path,
1494 strerror(errno)));
1495 goto out_close;
1496 }
1497
1498 if (listen(sock, 5) == -1) {
1499 DEBUG(0, ("listen failed on pipe socket %s: %s\n", path,
1500 strerror(errno)));
1501 goto out_close;
1502 }
1503
1504 SAFE_FREE(path);
1505
1506 umask(old_umask);
1507 return sock;
1508
1509 out_close:
1510 SAFE_FREE(path);
1511 if (sock != -1)
1512 close(sock);
1513
1514 out_umask:
1515 umask(old_umask);
1516 return -1;
1517
1518 #else
1519 DEBUG(0, ("create_pipe_sock: No Unix sockets on this system\n"));
1520 return -1;
1521 #endif /* HAVE_UNIXSOCKET */
1522 }
1523
1524 /****************************************************************************
1525 Get my own canonical name, including domain.
1526 ****************************************************************************/
1527
1528 const char *get_mydnsfullname(void)
1529 {
1530 struct addrinfo *res = NULL;
1531 char my_hostname[HOST_NAME_MAX];
1532 bool ret;
1533 DATA_BLOB tmp;
1534
1535 if (memcache_lookup(NULL, SINGLETON_CACHE,
1536 data_blob_string_const_null("get_mydnsfullname"),
1537 &tmp)) {
1538 SMB_ASSERT(tmp.length > 0);
1539 return (const char *)tmp.data;
1540 }
1541
1542 /* get my host name */
1543 if (gethostname(my_hostname, sizeof(my_hostname)) == -1) {
1544 DEBUG(0,("get_mydnsfullname: gethostname failed\n"));
1545 return NULL;
1546 }
1547
1548 /* Ensure null termination. */
1549 my_hostname[sizeof(my_hostname)-1] = '\0';
1550
1551 ret = interpret_string_addr_internal(&res,
1552 my_hostname,
1553 AI_ADDRCONFIG|AI_CANONNAME);
1554
1555 if (!ret || res == NULL) {
1556 DEBUG(3,("get_mydnsfullname: getaddrinfo failed for "
1557 "name %s [%s]\n",
1558 my_hostname,
1559 gai_strerror(ret) ));
1560 return NULL;
1561 }
1562
1563 /*
1564 * Make sure that getaddrinfo() returns the "correct" host name.
1565 */
1566
1567 if (res->ai_canonname == NULL) {
1568 DEBUG(3,("get_mydnsfullname: failed to get "
1569 "canonical name for %s\n",
1570 my_hostname));
1571 freeaddrinfo(res);
1572 return NULL;
1573 }
1574
1575 /* This copies the data, so we must do a lookup
1576 * afterwards to find the value to return.
1577 */
1578
1579 memcache_add(NULL, SINGLETON_CACHE,
1580 data_blob_string_const_null("get_mydnsfullname"),
1581 data_blob_string_const_null(res->ai_canonname));
1582
1583 if (!memcache_lookup(NULL, SINGLETON_CACHE,
1584 data_blob_string_const_null("get_mydnsfullname"),
1585 &tmp)) {
1586 tmp = data_blob_talloc(talloc_tos(), res->ai_canonname,
1587 strlen(res->ai_canonname) + 1);
1588 }
1589
1590 freeaddrinfo(res);
1591
1592 return (const char *)tmp.data;
1593 }
1594
1595 /************************************************************
1596 Is this my ip address ?
1597 ************************************************************/
1598
1599 static bool is_my_ipaddr(const char *ipaddr_str)
1600 {
1601 struct sockaddr_storage ss;
1602 struct iface_struct *nics;
1603 int i, n;
1604
1605 if (!interpret_string_addr(&ss, ipaddr_str, AI_NUMERICHOST)) {
1606 return false;
1607 }
1608
1609 if (ismyaddr((struct sockaddr *)&ss)) {
1610 return true;
1611 }
1612
1613 if (is_zero_addr(&ss) ||
1614 is_loopback_addr((struct sockaddr *)&ss)) {
1615 return false;
1616 }
1617
1618 n = get_interfaces(talloc_tos(), &nics);
1619 for (i=0; i<n; i++) {
1620 if (sockaddr_equal((struct sockaddr *)&nics[i].ip, (struct sockaddr *)&ss)) {
1621 TALLOC_FREE(nics);
1622 return true;
1623 }
1624 }
1625 TALLOC_FREE(nics);
1626 return false;
1627 }
1628
1629 /************************************************************
1630 Is this my name ?
1631 ************************************************************/
1632
1633 bool is_myname_or_ipaddr(const char *s)
1634 {
1635 TALLOC_CTX *ctx = talloc_tos();
1636 char *name = NULL;
1637 const char *dnsname;
1638 char *servername = NULL;
1639
1640 if (!s) {
1641 return false;
1642 }
1643
1644 /* Santize the string from '\\name' */
1645 name = talloc_strdup(ctx, s);
1646 if (!name) {
1647 return false;
1648 }
1649
1650 servername = strrchr_m(name, '\\' );
1651 if (!servername) {
1652 servername = name;
1653 } else {
1654 servername++;
1655 }
1656
1657 /* Optimize for the common case */
1658 if (strequal(servername, global_myname())) {
1659 return true;
1660 }
1661
1662 /* Check for an alias */
1663 if (is_myname(servername)) {
1664 return true;
1665 }
1666
1667 /* Check for loopback */
1668 if (strequal(servername, "127.0.0.1") ||
1669 strequal(servername, "::1")) {
1670 return true;
1671 }
1672
1673 if (strequal(servername, "localhost")) {
1674 return true;
1675 }
1676
1677 /* Maybe it's my dns name */
1678 dnsname = get_mydnsfullname();
1679 if (dnsname && strequal(servername, dnsname)) {
1680 return true;
1681 }
1682
1683 /* Maybe its an IP address? */
1684 if (is_ipaddress(servername)) {
1685 return is_my_ipaddr(servername);
1686 }
1687
1688 /* Handle possible CNAME records - convert to an IP addr. list. */
1689 {
1690 /* Use DNS to resolve the name, check all addresses. */
1691 struct addrinfo *p = NULL;
1692 struct addrinfo *res = NULL;
1693
1694 if (!interpret_string_addr_internal(&res,
1695 servername,
1696 AI_ADDRCONFIG)) {
1697 return false;
1698 }
1699
1700 for (p = res; p; p = p->ai_next) {
1701 char addr[INET6_ADDRSTRLEN];
1702 struct sockaddr_storage ss;
1703
1704 ZERO_STRUCT(ss);
1705 memcpy(&ss, p->ai_addr, p->ai_addrlen);
1706 print_sockaddr(addr,
1707 sizeof(addr),
1708 &ss);
1709 if (is_my_ipaddr(addr)) {
1710 freeaddrinfo(res);
1711 return true;
1712 }
1713 }
1714 freeaddrinfo(res);
1715 }
1716
1717 /* No match */
1718 return false;
1719 }
1720
1721 struct getaddrinfo_state {
1722 const char *node;
1723 const char *service;
1724 const struct addrinfo *hints;
1725 struct addrinfo *res;
1726 int ret;
1727 };
1728
1729 static void getaddrinfo_do(void *private_data);
1730 static void getaddrinfo_done(struct tevent_req *subreq);
1731
1732 struct tevent_req *getaddrinfo_send(TALLOC_CTX *mem_ctx,
1733 struct tevent_context *ev,
1734 struct fncall_context *ctx,
1735 const char *node,
1736 const char *service,
1737 const struct addrinfo *hints)
1738 {
1739 struct tevent_req *req, *subreq;
1740 struct getaddrinfo_state *state;
1741
1742 req = tevent_req_create(mem_ctx, &state, struct getaddrinfo_state);
1743 if (req == NULL) {
1744 return NULL;
1745 }
1746
1747 state->node = node;
1748 state->service = service;
1749 state->hints = hints;
1750
1751 subreq = fncall_send(state, ev, ctx, getaddrinfo_do, state);
1752 if (tevent_req_nomem(subreq, req)) {
1753 return tevent_req_post(req, ev);
1754 }
1755 tevent_req_set_callback(subreq, getaddrinfo_done, req);
1756 return req;
1757 }
1758
1759 static void getaddrinfo_do(void *private_data)
1760 {
1761 struct getaddrinfo_state *state =
1762 (struct getaddrinfo_state *)private_data;
1763
1764 state->ret = getaddrinfo(state->node, state->service, state->hints,
1765 &state->res);
1766 }
1767
1768 static void getaddrinfo_done(struct tevent_req *subreq)
1769 {
1770 struct tevent_req *req = tevent_req_callback_data(
1771 subreq, struct tevent_req);
1772 int ret, err;
1773
1774 ret = fncall_recv(subreq, &err);
1775 TALLOC_FREE(subreq);
1776 if (ret == -1) {
1777 tevent_req_error(req, err);
1778 return;
1779 }
1780 tevent_req_done(req);
1781 }
1782
1783 int getaddrinfo_recv(struct tevent_req *req, struct addrinfo **res)
1784 {
1785 struct getaddrinfo_state *state = tevent_req_data(
1786 req, struct getaddrinfo_state);
1787 int err;
1788
1789 if (tevent_req_is_unix_error(req, &err)) {
1790 switch(err) {
1791 case ENOMEM:
1792 return EAI_MEMORY;
1793 default:
1794 return EAI_FAIL;
1795 }
1796 }
1797 if (state->ret == 0) {
1798 *res = state->res;
1799 }
1800 return state->ret;
1801 }
1802
1803 int poll_one_fd(int fd, int events, int timeout, int *revents)
1804 {
1805 struct pollfd *fds;
1806 int ret;
1807 int saved_errno;
1808
1809 fds = TALLOC_ZERO_ARRAY(talloc_tos(), struct pollfd, 2);
1810 if (fds == NULL) {
1811 errno = ENOMEM;
1812 return -1;
1813 }
1814 fds[0].fd = fd;
1815 fds[0].events = events;
1816
1817 ret = sys_poll(fds, 1, timeout);
1818
1819 /*
1820 * Assign whatever poll did, even in the ret<=0 case.
1821 */
1822 *revents = fds[0].revents;
1823 saved_errno = errno;
1824 TALLOC_FREE(fds);
1825 errno = saved_errno;
1826
1827 return ret;
1828 }
1829
1830 int poll_intr_one_fd(int fd, int events, int timeout, int *revents)
1831 {
1832 struct pollfd pfd;
1833 int ret;
1834
1835 pfd.fd = fd;
1836 pfd.events = events;
1837
1838 ret = sys_poll_intr(&pfd, 1, timeout);
1839 if (ret <= 0) {
1840 *revents = 0;
1841 return ret;
1842 }
1843 *revents = pfd.revents;
1844 return 1;
1845 }
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