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-rw-r--r--src/util/network.c1334
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diff --git a/src/util/network.c b/src/util/network.c
deleted file mode 100644
index 2f77bc54e..000000000
--- a/src/util/network.c
+++ /dev/null
@@ -1,1334 +0,0 @@
1/*
2 This file is part of GNUnet.
3 Copyright (C) 2009-2013 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20
21/**
22 * @file util/network.c
23 * @brief basic, low-level networking interface
24 * @author Nils Durner
25 * @author Christian Grothoff
26 */
27#include "platform.h"
28#include "gnunet_util_lib.h"
29#include "disk.h"
30
31#define LOG(kind, ...) GNUNET_log_from (kind, "util-network", __VA_ARGS__)
32#define LOG_STRERROR_FILE(kind, syscall, \
33 filename) GNUNET_log_from_strerror_file (kind, \
34 "util-network", \
35 syscall, \
36 filename)
37#define LOG_STRERROR(kind, syscall) GNUNET_log_from_strerror (kind, \
38 "util-network", \
39 syscall)
40
41#define DEBUG_NETWORK GNUNET_EXTRA_LOGGING
42
43
44#ifndef INVALID_SOCKET
45#define INVALID_SOCKET -1
46#endif
47
48
49/**
50 * @brief handle to a socket
51 */
52struct GNUNET_NETWORK_Handle
53{
54 int fd;
55
56 /**
57 * Address family / domain.
58 */
59 int af;
60
61 /**
62 * Type of the socket
63 */
64 int type;
65
66 /**
67 * Number of bytes in addr.
68 */
69 socklen_t addrlen;
70
71 /**
72 * Address we were bound to, or NULL.
73 */
74 struct sockaddr *addr;
75};
76
77
78enum GNUNET_GenericReturnValue
79GNUNET_NETWORK_test_pf (int pf)
80{
81 static int cache_v4 = -1;
82 static int cache_v6 = -1;
83 static int cache_un = -1;
84 int s;
85 int ret;
86
87 switch (pf)
88 {
89 case PF_INET:
90 if (-1 != cache_v4)
91 return cache_v4;
92 break;
93
94 case PF_INET6:
95 if (-1 != cache_v6)
96 return cache_v6;
97 break;
98
99#ifdef PF_UNIX
100 case PF_UNIX:
101 if (-1 != cache_un)
102 return cache_un;
103 break;
104#endif
105 }
106 s = socket (pf, SOCK_STREAM, 0);
107 if (-1 == s)
108 {
109 if (EAFNOSUPPORT != errno)
110 {
111 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
112 "socket");
113 return GNUNET_SYSERR;
114 }
115 ret = GNUNET_NO;
116 }
117 else
118 {
119 GNUNET_break (0 == close (s));
120 ret = GNUNET_OK;
121 }
122 switch (pf)
123 {
124 case PF_INET:
125 cache_v4 = ret;
126 break;
127
128 case PF_INET6:
129 cache_v6 = ret;
130 break;
131
132#ifdef PF_UNIX
133 case PF_UNIX:
134 cache_un = ret;
135 break;
136#endif
137 }
138 return ret;
139}
140
141
142char *
143GNUNET_NETWORK_shorten_unixpath (char *unixpath)
144{
145 struct sockaddr_un dummy;
146 size_t slen;
147 char *end;
148 struct GNUNET_HashCode sh;
149 struct GNUNET_CRYPTO_HashAsciiEncoded ae;
150 size_t upm;
151
152 upm = sizeof(dummy.sun_path);
153 slen = strlen (unixpath);
154 if (slen < upm)
155 return unixpath; /* no shortening required */
156 GNUNET_CRYPTO_hash (unixpath, slen, &sh);
157 while (16 + strlen (unixpath) >= upm)
158 {
159 if (NULL == (end = strrchr (unixpath, '/')))
160 {
161 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
162 _ (
163 "Unable to shorten unix path `%s' while keeping name unique\n"),
164 unixpath);
165 GNUNET_free (unixpath);
166 return NULL;
167 }
168 *end = '\0';
169 }
170 GNUNET_CRYPTO_hash_to_enc (&sh, &ae);
171 ae.encoding[16] = '\0';
172 strcat (unixpath, (char *) ae.encoding);
173 return unixpath;
174}
175
176
177void
178GNUNET_NETWORK_unix_precheck (const struct sockaddr_un *un)
179{
180 int s;
181 int eno;
182 struct stat sbuf;
183 int ret;
184
185 s = socket (AF_UNIX, SOCK_STREAM, 0);
186 if (-1 == s)
187 {
188 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
189 "Failed to open AF_UNIX socket");
190 return;
191 }
192 ret = connect (s,
193 (struct sockaddr *) un,
194 sizeof(struct sockaddr_un));
195 eno = errno;
196 GNUNET_break (0 == close (s));
197 if (0 == ret)
198 return; /* another process is listening, do not remove! */
199 if (ECONNREFUSED != eno)
200 return; /* some other error, likely "no such file or directory" -- all well */
201 /* should unlink, but sanity checks first */
202 if (0 != stat (un->sun_path,
203 &sbuf))
204 return; /* failed to 'stat', likely does not exist after all */
205 if (S_IFSOCK != (S_IFMT & sbuf.st_mode))
206 return; /* refuse to unlink anything except sockets */
207 /* finally, really unlink */
208 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
209 "Removing left-over `%s' from previous exeuction\n",
210 un->sun_path);
211 if (0 != unlink (un->sun_path))
212 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
213 "unlink",
214 un->sun_path);
215}
216
217
218#ifndef FD_COPY
219#define FD_COPY(s, d) do { GNUNET_memcpy ((d), (s), sizeof(fd_set)); } while (0)
220#endif
221
222
223enum GNUNET_GenericReturnValue
224GNUNET_NETWORK_socket_set_blocking (struct GNUNET_NETWORK_Handle *fd,
225 int doBlock)
226{
227 int flags = fcntl (fd->fd, F_GETFL);
228
229 if (flags == -1)
230 {
231 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
232 "fcntl");
233 return GNUNET_SYSERR;
234 }
235 if (doBlock)
236 flags &= ~O_NONBLOCK;
237
238 else
239 flags |= O_NONBLOCK;
240 if (0 != fcntl (fd->fd,
241 F_SETFL,
242 flags))
243
244 {
245 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
246 "fcntl");
247 return GNUNET_SYSERR;
248 }
249 return GNUNET_OK;
250}
251
252
253/**
254 * Make a socket non-inheritable to child processes
255 *
256 * @param h the socket to make non-inheritable
257 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
258 * @warning Not implemented on Windows
259 */
260static int
261socket_set_inheritable (const struct GNUNET_NETWORK_Handle *h)
262{
263 int i;
264 i = fcntl (h->fd, F_GETFD);
265 if (i < 0)
266 return GNUNET_SYSERR;
267 if (i == (i | FD_CLOEXEC))
268 return GNUNET_OK;
269 i |= FD_CLOEXEC;
270 if (fcntl (h->fd, F_SETFD, i) < 0)
271 return GNUNET_SYSERR;
272
273 return GNUNET_OK;
274}
275
276
277#ifdef DARWIN
278/**
279 * The MSG_NOSIGNAL equivalent on Mac OS X
280 *
281 * @param h the socket to make non-delaying
282 */
283static int
284socket_set_nosigpipe (const struct GNUNET_NETWORK_Handle *h)
285{
286 int abs_value = 1;
287
288 if (0 !=
289 setsockopt (h->fd, SOL_SOCKET, SO_NOSIGPIPE,
290 (const void *) &abs_value,
291 sizeof(abs_value)))
292 return GNUNET_SYSERR;
293 return GNUNET_OK;
294}
295
296
297#endif
298
299
300/**
301 * Disable delays when sending data via the socket.
302 * (GNUnet makes sure that messages are as big as
303 * possible already).
304 *
305 * @param h the socket to make non-delaying
306 */
307static void
308socket_set_nodelay (const struct GNUNET_NETWORK_Handle *h)
309{
310 int value = 1;
311
312 if (0 !=
313 setsockopt (h->fd,
314 IPPROTO_TCP,
315 TCP_NODELAY,
316 &value, sizeof(value)))
317 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
318 "setsockopt");
319}
320
321
322/**
323 * Perform proper canonical initialization for a network handle.
324 * Set it to non-blocking, make it non-inheritable to child
325 * processes, disable SIGPIPE, enable "nodelay" (if non-UNIX
326 * stream socket) and check that it is smaller than FD_SETSIZE.
327 *
328 * @param h socket to initialize
329 * @param af address family of the socket
330 * @param type socket type
331 * @return #GNUNET_OK on success, #GNUNET_SYSERR if initialization
332 * failed and the handle was destroyed
333 */
334static int
335initialize_network_handle (struct GNUNET_NETWORK_Handle *h,
336 int af,
337 int type)
338{
339 int eno;
340
341 h->af = af;
342 h->type = type;
343 if (h->fd == INVALID_SOCKET)
344 {
345 eno = errno;
346 GNUNET_free (h);
347 errno = eno;
348 return GNUNET_SYSERR;
349 }
350
351 if (h->fd >= FD_SETSIZE)
352 {
353 GNUNET_break (GNUNET_OK ==
354 GNUNET_NETWORK_socket_close (h));
355 errno = EMFILE;
356 return GNUNET_SYSERR;
357 }
358
359 if (GNUNET_OK != socket_set_inheritable (h))
360 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
361 "socket_set_inheritable");
362
363 if (GNUNET_SYSERR == GNUNET_NETWORK_socket_set_blocking (h, GNUNET_NO))
364 {
365 eno = errno;
366 GNUNET_break (0);
367 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (h));
368 errno = eno;
369 return GNUNET_SYSERR;
370 }
371#ifdef DARWIN
372 if (GNUNET_SYSERR == socket_set_nosigpipe (h))
373 {
374 eno = errno;
375 GNUNET_break (0);
376 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (h));
377 errno = eno;
378 return GNUNET_SYSERR;
379 }
380#endif
381 if ((type == SOCK_STREAM)
382#ifdef AF_UNIX
383 && (af != AF_UNIX)
384#endif
385 )
386 socket_set_nodelay (h);
387 return GNUNET_OK;
388}
389
390
391struct GNUNET_NETWORK_Handle *
392GNUNET_NETWORK_socket_accept (const struct GNUNET_NETWORK_Handle *desc,
393 struct sockaddr *address,
394 socklen_t *address_len)
395{
396 struct GNUNET_NETWORK_Handle *ret;
397 int eno;
398
399 ret = GNUNET_new (struct GNUNET_NETWORK_Handle);
400#if DEBUG_NETWORK
401 {
402 struct sockaddr_storage name;
403 socklen_t namelen = sizeof(name);
404
405 int gsn = getsockname (desc->fd,
406 (struct sockaddr *) &name,
407 &namelen);
408
409 if (0 == gsn)
410 LOG (GNUNET_ERROR_TYPE_DEBUG,
411 "Accepting connection on `%s'\n",
412 GNUNET_a2s ((const struct sockaddr *) &name,
413 namelen));
414 }
415#endif
416 ret->fd = accept (desc->fd,
417 address,
418 address_len);
419 if (-1 == ret->fd)
420 {
421 eno = errno;
422 GNUNET_free (ret);
423 errno = eno;
424 return NULL;
425 }
426 if (GNUNET_OK !=
427 initialize_network_handle (ret,
428 (NULL != address) ? address->sa_family :
429 desc->af,
430 SOCK_STREAM))
431 {
432 return NULL;
433 }
434 return ret;
435}
436
437
438enum GNUNET_GenericReturnValue
439GNUNET_NETWORK_socket_bind (struct GNUNET_NETWORK_Handle *desc,
440 const struct sockaddr *address,
441 socklen_t address_len)
442{
443 int ret;
444
445#ifdef IPV6_V6ONLY
446#ifdef IPPROTO_IPV6
447 {
448 const int on = 1;
449
450 if (AF_INET6 == desc->af)
451 if (setsockopt (desc->fd,
452 IPPROTO_IPV6,
453 IPV6_V6ONLY,
454 (const void *) &on,
455 sizeof(on)))
456 LOG_STRERROR (GNUNET_ERROR_TYPE_DEBUG,
457 "setsockopt");
458 }
459#endif
460#endif
461 if (AF_UNIX == address->sa_family)
462 GNUNET_NETWORK_unix_precheck ((const struct sockaddr_un *) address);
463
464 {
465 const int on = 1;
466
467 if ( (SOCK_STREAM == desc->type) &&
468 (0 != setsockopt (desc->fd,
469 SOL_SOCKET,
470 SO_REUSEADDR,
471 &on, sizeof(on))) )
472 LOG_STRERROR (GNUNET_ERROR_TYPE_DEBUG,
473 "setsockopt");
474 }
475 {
476 /* set permissions of newly created non-abstract UNIX domain socket to
477 "user-only"; applications can choose to relax this later */
478 mode_t old_mask = 0; /* assigned to make compiler happy */
479 const struct sockaddr_un *un = (const struct sockaddr_un *) address;
480 int not_abstract = 0;
481
482 if ((AF_UNIX == address->sa_family)
483 && ('\0' != un->sun_path[0])) /* Not an abstract socket */
484 not_abstract = 1;
485 if (not_abstract)
486 old_mask = umask (S_IWGRP | S_IRGRP | S_IXGRP | S_IWOTH | S_IROTH
487 | S_IXOTH);
488
489 ret = bind (desc->fd,
490 address,
491 address_len);
492
493 if (not_abstract)
494 (void) umask (old_mask);
495 }
496 if (0 != ret)
497 return GNUNET_SYSERR;
498
499 desc->addr = GNUNET_malloc (address_len);
500 GNUNET_memcpy (desc->addr, address, address_len);
501 desc->addrlen = address_len;
502
503 return GNUNET_OK;
504}
505
506
507enum GNUNET_GenericReturnValue
508GNUNET_NETWORK_socket_close (struct GNUNET_NETWORK_Handle *desc)
509{
510 int ret;
511
512 ret = close (desc->fd);
513
514 const struct sockaddr_un *un = (const struct sockaddr_un *) desc->addr;
515
516 /* Cleanup the UNIX domain socket and its parent directories in case of non
517 abstract sockets */
518 if ((AF_UNIX == desc->af) &&
519 (NULL != desc->addr) &&
520 ('\0' != un->sun_path[0]))
521 {
522 char *dirname = GNUNET_strndup (un->sun_path,
523 sizeof(un->sun_path));
524
525 if (0 != unlink (dirname))
526 {
527 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING,
528 "unlink",
529 dirname);
530 }
531 else
532 {
533 size_t len;
534
535 len = strlen (dirname);
536 while ((len > 0) && (dirname[len] != DIR_SEPARATOR))
537 len--;
538 dirname[len] = '\0';
539 if ((0 != len) && (0 != rmdir (dirname)))
540 {
541 switch (errno)
542 {
543 case EACCES:
544 case ENOTEMPTY:
545 case EPERM:
546 /* these are normal and can just be ignored */
547 break;
548
549 default:
550 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
551 "rmdir",
552 dirname);
553 break;
554 }
555 }
556 }
557 GNUNET_free (dirname);
558 }
559 GNUNET_NETWORK_socket_free_memory_only_ (desc);
560 return (ret == 0) ? GNUNET_OK : GNUNET_SYSERR;
561}
562
563
564/**
565 * Only free memory of a socket, keep the file descriptor untouched.
566 *
567 * @param desc socket
568 */
569void
570GNUNET_NETWORK_socket_free_memory_only_ (struct GNUNET_NETWORK_Handle *desc)
571{
572 GNUNET_free (desc->addr);
573 GNUNET_free (desc);
574}
575
576
577/**
578 * Box a native socket (and check that it is a socket).
579 *
580 * @param fd socket to box
581 * @return NULL on error (including not supported on target platform)
582 */
583struct GNUNET_NETWORK_Handle *
584GNUNET_NETWORK_socket_box_native (int fd)
585{
586 struct GNUNET_NETWORK_Handle *ret;
587
588 if (fcntl (fd, F_GETFD) < 0)
589 return NULL; /* invalid FD */
590 ret = GNUNET_new (struct GNUNET_NETWORK_Handle);
591 ret->fd = fd;
592 ret->af = AF_UNSPEC;
593 return ret;
594}
595
596
597/**
598 * Connect a socket to some remote address.
599 *
600 * @param desc socket
601 * @param address peer address
602 * @param address_len length of @a address
603 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
604 */
605int
606GNUNET_NETWORK_socket_connect (const struct GNUNET_NETWORK_Handle *desc,
607 const struct sockaddr *address,
608 socklen_t address_len)
609{
610 int ret;
611
612 ret = connect (desc->fd,
613 address,
614 address_len);
615
616 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
617}
618
619
620/**
621 * Get socket options
622 *
623 * @param desc socket
624 * @param level protocol level of the option
625 * @param optname identifier of the option
626 * @param optval options
627 * @param optlen length of @a optval
628 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
629 */
630int
631GNUNET_NETWORK_socket_getsockopt (const struct GNUNET_NETWORK_Handle *desc,
632 int level,
633 int optname,
634 void *optval,
635 socklen_t *optlen)
636{
637 int ret;
638
639 ret = getsockopt (desc->fd,
640 level,
641 optname,
642 optval, optlen);
643
644 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
645}
646
647
648/**
649 * Listen on a socket
650 *
651 * @param desc socket
652 * @param backlog length of the listen queue
653 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
654 */
655int
656GNUNET_NETWORK_socket_listen (const struct GNUNET_NETWORK_Handle *desc,
657 int backlog)
658{
659 int ret;
660
661 ret = listen (desc->fd,
662 backlog);
663
664 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
665}
666
667
668/**
669 * How much data is available to be read on this descriptor?
670 *
671 * @param desc socket
672 * @returns #GNUNET_SYSERR if no data is available, or on error!
673 */
674ssize_t
675GNUNET_NETWORK_socket_recvfrom_amount (const struct GNUNET_NETWORK_Handle *desc)
676{
677 int error;
678
679 /* How much is there to be read? */
680 int pending;
681
682 error = ioctl (desc->fd,
683 FIONREAD,
684 &pending);
685 if (0 == error)
686 return (ssize_t) pending;
687 return GNUNET_SYSERR;
688}
689
690
691/**
692 * Read data from a socket (always non-blocking).
693 *
694 * @param desc socket
695 * @param buffer buffer
696 * @param length length of @a buffer
697 * @param src_addr either the source to recv from, or all zeroes
698 * to be filled in by recvfrom
699 * @param addrlen length of the @a src_addr
700 */
701ssize_t
702GNUNET_NETWORK_socket_recvfrom (const struct GNUNET_NETWORK_Handle *desc,
703 void *buffer,
704 size_t length,
705 struct sockaddr *src_addr,
706 socklen_t *addrlen)
707{
708 int flags = 0;
709
710#ifdef MSG_DONTWAIT
711 flags |= MSG_DONTWAIT;
712#endif
713 return recvfrom (desc->fd,
714 buffer,
715 length,
716 flags,
717 src_addr,
718 addrlen);
719}
720
721
722/**
723 * Read data from a connected socket (always non-blocking).
724 *
725 * @param desc socket
726 * @param buffer buffer
727 * @param length length of @a buffer
728 * @return number of bytes received, -1 on error
729 */
730ssize_t
731GNUNET_NETWORK_socket_recv (const struct GNUNET_NETWORK_Handle *desc,
732 void *buffer,
733 size_t length)
734{
735 int ret;
736 int flags;
737
738 flags = 0;
739
740#ifdef MSG_DONTWAIT
741 flags |= MSG_DONTWAIT;
742#endif
743 ret = recv (desc->fd,
744 buffer,
745 length,
746 flags);
747 return ret;
748}
749
750
751/**
752 * Send data (always non-blocking).
753 *
754 * @param desc socket
755 * @param buffer data to send
756 * @param length size of the @a buffer
757 * @return number of bytes sent, #GNUNET_SYSERR on error
758 */
759ssize_t
760GNUNET_NETWORK_socket_send (const struct GNUNET_NETWORK_Handle *desc,
761 const void *buffer,
762 size_t length)
763{
764 int ret;
765 int flags;
766
767 flags = 0;
768#ifdef MSG_DONTWAIT
769 flags |= MSG_DONTWAIT;
770#endif
771#ifdef MSG_NOSIGNAL
772 flags |= MSG_NOSIGNAL;
773#endif
774 ret = send (desc->fd,
775 buffer,
776 length,
777 flags);
778 return ret;
779}
780
781
782/**
783 * Send data to a particular destination (always non-blocking).
784 * This function only works for UDP sockets.
785 *
786 * @param desc socket
787 * @param message data to send
788 * @param length size of the @a message
789 * @param dest_addr destination address
790 * @param dest_len length of @a address
791 * @return number of bytes sent, #GNUNET_SYSERR on error
792 */
793ssize_t
794GNUNET_NETWORK_socket_sendto (const struct GNUNET_NETWORK_Handle *desc,
795 const void *message,
796 size_t length,
797 const struct sockaddr *dest_addr,
798 socklen_t dest_len)
799{
800 int flags = 0;
801
802#ifdef MSG_DONTWAIT
803 flags |= MSG_DONTWAIT;
804#endif
805#ifdef MSG_NOSIGNAL
806 flags |= MSG_NOSIGNAL;
807#endif
808 return sendto (desc->fd,
809 message,
810 length,
811 flags,
812 dest_addr,
813 dest_len);
814}
815
816
817/**
818 * Set socket option
819 *
820 * @param fd socket
821 * @param level protocol level of the option
822 * @param option_name option identifier
823 * @param option_value value to set
824 * @param option_len size of @a option_value
825 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
826 */
827int
828GNUNET_NETWORK_socket_setsockopt (struct GNUNET_NETWORK_Handle *fd,
829 int level,
830 int option_name,
831 const void *option_value,
832 socklen_t option_len)
833{
834 return (0 == setsockopt (fd->fd,
835 level,
836 option_name,
837 option_value,
838 option_len))
839 ? GNUNET_OK
840 : GNUNET_SYSERR;
841}
842
843
844/**
845 * Create a new socket. Configure it for non-blocking IO and
846 * mark it as non-inheritable to child processes (set the
847 * close-on-exec flag).
848 *
849 * @param domain domain of the socket
850 * @param type socket type
851 * @param protocol network protocol
852 * @return new socket, NULL on error
853 */
854struct GNUNET_NETWORK_Handle *
855GNUNET_NETWORK_socket_create (int domain,
856 int type,
857 int protocol)
858{
859 struct GNUNET_NETWORK_Handle *ret;
860 int fd;
861
862 fd = socket (domain, type, protocol);
863 if (-1 == fd)
864 return NULL;
865 ret = GNUNET_new (struct GNUNET_NETWORK_Handle);
866 ret->fd = fd;
867 if (GNUNET_OK !=
868 initialize_network_handle (ret,
869 domain,
870 type))
871 return NULL;
872 return ret;
873}
874
875
876/**
877 * Shut down socket operations
878 * @param desc socket
879 * @param how type of shutdown
880 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
881 */
882int
883GNUNET_NETWORK_socket_shutdown (struct GNUNET_NETWORK_Handle *desc,
884 int how)
885{
886 int ret;
887
888 ret = shutdown (desc->fd, how);
889
890 return (0 == ret) ? GNUNET_OK : GNUNET_SYSERR;
891}
892
893
894/**
895 * Disable the "CORK" feature for communication with the given socket,
896 * forcing the OS to immediately flush the buffer on transmission
897 * instead of potentially buffering multiple messages. Essentially
898 * reduces the OS send buffers to zero.
899 *
900 * @param desc socket
901 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
902 */
903int
904GNUNET_NETWORK_socket_disable_corking (struct GNUNET_NETWORK_Handle *desc)
905{
906 int ret = 0;
907
908#ifdef __linux__
909 int value = 0;
910
911 if (0 !=
912 (ret =
913 setsockopt (desc->fd,
914 SOL_SOCKET,
915 SO_SNDBUF,
916 &value,
917 sizeof(value))))
918 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
919 "setsockopt");
920 if (0 !=
921 (ret =
922 setsockopt (desc->fd,
923 SOL_SOCKET,
924 SO_RCVBUF,
925 &value,
926 sizeof(value))))
927 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
928 "setsockopt");
929#endif
930 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
931}
932
933
934/**
935 * Reset FD set
936 *
937 * @param fds fd set
938 */
939void
940GNUNET_NETWORK_fdset_zero (struct GNUNET_NETWORK_FDSet *fds)
941{
942 FD_ZERO (&fds->sds);
943 fds->nsds = 0;
944}
945
946
947/**
948 * Add a socket to the FD set
949 *
950 * @param fds fd set
951 * @param desc socket to add
952 */
953void
954GNUNET_NETWORK_fdset_set (struct GNUNET_NETWORK_FDSet *fds,
955 const struct GNUNET_NETWORK_Handle *desc)
956{
957 FD_SET (desc->fd,
958 &fds->sds);
959 fds->nsds = GNUNET_MAX (fds->nsds,
960 desc->fd + 1);
961}
962
963
964/**
965 * Check whether a socket is part of the fd set
966 *
967 * @param fds fd set
968 * @param desc socket
969 * @return 0 if the FD is not set
970 */
971int
972GNUNET_NETWORK_fdset_isset (const struct GNUNET_NETWORK_FDSet *fds,
973 const struct GNUNET_NETWORK_Handle *desc)
974{
975 return FD_ISSET (desc->fd,
976 &fds->sds);
977}
978
979
980/**
981 * Add one fd set to another
982 *
983 * @param dst the fd set to add to
984 * @param src the fd set to add from
985 */
986void
987GNUNET_NETWORK_fdset_add (struct GNUNET_NETWORK_FDSet *dst,
988 const struct GNUNET_NETWORK_FDSet *src)
989{
990 int nfds;
991
992 for (nfds = src->nsds; nfds >= 0; nfds--)
993 if (FD_ISSET (nfds, &src->sds))
994 FD_SET (nfds, &dst->sds);
995 dst->nsds = GNUNET_MAX (dst->nsds,
996 src->nsds);
997}
998
999
1000/**
1001 * Copy one fd set to another
1002 *
1003 * @param to destination
1004 * @param from source
1005 */
1006void
1007GNUNET_NETWORK_fdset_copy (struct GNUNET_NETWORK_FDSet *to,
1008 const struct GNUNET_NETWORK_FDSet *from)
1009{
1010 FD_COPY (&from->sds,
1011 &to->sds);
1012 to->nsds = from->nsds;
1013}
1014
1015
1016/**
1017 * Return file descriptor for this network handle
1018 *
1019 * @param desc wrapper to process
1020 * @return POSIX file descriptor
1021 */
1022int
1023GNUNET_NETWORK_get_fd (const struct GNUNET_NETWORK_Handle *desc)
1024{
1025 return desc->fd;
1026}
1027
1028
1029/**
1030 * Return sockaddr for this network handle
1031 *
1032 * @param desc wrapper to process
1033 * @return sockaddr
1034 */
1035struct sockaddr*
1036GNUNET_NETWORK_get_addr (const struct GNUNET_NETWORK_Handle *desc)
1037{
1038 return desc->addr;
1039}
1040
1041
1042/**
1043 * Return sockaddr length for this network handle
1044 *
1045 * @param desc wrapper to process
1046 * @return socklen_t for sockaddr
1047 */
1048socklen_t
1049GNUNET_NETWORK_get_addrlen (const struct GNUNET_NETWORK_Handle *desc)
1050{
1051 return desc->addrlen;
1052}
1053
1054
1055/**
1056 * Copy a native fd set
1057 *
1058 * @param to destination
1059 * @param from native source set
1060 * @param nfds the biggest socket number in from + 1
1061 */
1062void
1063GNUNET_NETWORK_fdset_copy_native (struct GNUNET_NETWORK_FDSet *to,
1064 const fd_set *from,
1065 int nfds)
1066{
1067 FD_COPY (from,
1068 &to->sds);
1069 to->nsds = nfds;
1070}
1071
1072
1073/**
1074 * Set a native fd in a set
1075 *
1076 * @param to destination
1077 * @param nfd native FD to set
1078 */
1079void
1080GNUNET_NETWORK_fdset_set_native (struct GNUNET_NETWORK_FDSet *to,
1081 int nfd)
1082{
1083 GNUNET_assert ((nfd >= 0) && (nfd < FD_SETSIZE));
1084 FD_SET (nfd, &to->sds);
1085 to->nsds = GNUNET_MAX (nfd + 1,
1086 to->nsds);
1087}
1088
1089
1090/**
1091 * Test native fd in a set
1092 *
1093 * @param to set to test, NULL for empty set
1094 * @param nfd native FD to test, or -1 for none
1095 * @return #GNUNET_YES if FD is set in the set
1096 */
1097int
1098GNUNET_NETWORK_fdset_test_native (const struct GNUNET_NETWORK_FDSet *to,
1099 int nfd)
1100{
1101 if ((-1 == nfd) ||
1102 (NULL == to))
1103 return GNUNET_NO;
1104 return FD_ISSET (nfd, &to->sds) ? GNUNET_YES : GNUNET_NO;
1105}
1106
1107
1108/**
1109 * Add a file handle to the fd set
1110 * @param fds fd set
1111 * @param h the file handle to add
1112 */
1113void
1114GNUNET_NETWORK_fdset_handle_set (struct GNUNET_NETWORK_FDSet *fds,
1115 const struct GNUNET_DISK_FileHandle *h)
1116{
1117 int fd;
1118
1119 GNUNET_assert (GNUNET_OK ==
1120 GNUNET_DISK_internal_file_handle_ (h,
1121 &fd,
1122 sizeof(int)));
1123 FD_SET (fd,
1124 &fds->sds);
1125 fds->nsds = GNUNET_MAX (fd + 1,
1126 fds->nsds);
1127}
1128
1129
1130/**
1131 * Add a file handle to the fd set
1132 * @param fds fd set
1133 * @param h the file handle to add
1134 */
1135void
1136GNUNET_NETWORK_fdset_handle_set_first (struct GNUNET_NETWORK_FDSet *fds,
1137 const struct GNUNET_DISK_FileHandle *h)
1138{
1139 GNUNET_NETWORK_fdset_handle_set (fds, h);
1140}
1141
1142
1143/**
1144 * Check if a file handle is part of an fd set
1145 *
1146 * @param fds fd set
1147 * @param h file handle
1148 * @return #GNUNET_YES if the file handle is part of the set
1149 */
1150int
1151GNUNET_NETWORK_fdset_handle_isset (const struct GNUNET_NETWORK_FDSet *fds,
1152 const struct GNUNET_DISK_FileHandle *h)
1153{
1154 return FD_ISSET (h->fd,
1155 &fds->sds);
1156}
1157
1158
1159/**
1160 * Checks if two fd sets overlap
1161 *
1162 * @param fds1 first fd set
1163 * @param fds2 second fd set
1164 * @return #GNUNET_YES if they do overlap, #GNUNET_NO otherwise
1165 */
1166int
1167GNUNET_NETWORK_fdset_overlap (const struct GNUNET_NETWORK_FDSet *fds1,
1168 const struct GNUNET_NETWORK_FDSet *fds2)
1169{
1170 int nfds;
1171
1172 nfds = GNUNET_MIN (fds1->nsds,
1173 fds2->nsds);
1174 while (nfds > 0)
1175 {
1176 nfds--;
1177 if ((FD_ISSET (nfds,
1178 &fds1->sds)) &&
1179 (FD_ISSET (nfds,
1180 &fds2->sds)))
1181 return GNUNET_YES;
1182 }
1183 return GNUNET_NO;
1184}
1185
1186
1187/**
1188 * Creates an fd set
1189 *
1190 * @return a new fd set
1191 */
1192struct GNUNET_NETWORK_FDSet *
1193GNUNET_NETWORK_fdset_create ()
1194{
1195 struct GNUNET_NETWORK_FDSet *fds;
1196
1197 fds = GNUNET_new (struct GNUNET_NETWORK_FDSet);
1198 GNUNET_NETWORK_fdset_zero (fds);
1199 return fds;
1200}
1201
1202
1203/**
1204 * Releases the associated memory of an fd set
1205 *
1206 * @param fds fd set
1207 */
1208void
1209GNUNET_NETWORK_fdset_destroy (struct GNUNET_NETWORK_FDSet *fds)
1210{
1211 GNUNET_free (fds);
1212}
1213
1214
1215/**
1216 * Test if the given @a port is available.
1217 *
1218 * @param ipproto transport protocol to test (e.g. IPPROTO_TCP)
1219 * @param port port number to test
1220 * @return #GNUNET_OK if the port is available, #GNUNET_NO if not
1221 */
1222int
1223GNUNET_NETWORK_test_port_free (int ipproto,
1224 uint16_t port)
1225{
1226 struct GNUNET_NETWORK_Handle *socket;
1227 int bind_status;
1228 int socktype;
1229 char open_port_str[6];
1230 struct addrinfo hint;
1231 struct addrinfo *ret;
1232 struct addrinfo *ai;
1233
1234 GNUNET_snprintf (open_port_str,
1235 sizeof(open_port_str),
1236 "%u",
1237 (unsigned int) port);
1238 socktype = (IPPROTO_TCP == ipproto) ? SOCK_STREAM : SOCK_DGRAM;
1239 ret = NULL;
1240 memset (&hint, 0, sizeof(hint));
1241 hint.ai_family = AF_UNSPEC; /* IPv4 and IPv6 */
1242 hint.ai_socktype = socktype;
1243 hint.ai_protocol = ipproto;
1244 hint.ai_addrlen = 0;
1245 hint.ai_addr = NULL;
1246 hint.ai_canonname = NULL;
1247 hint.ai_next = NULL;
1248 hint.ai_flags = AI_PASSIVE | AI_NUMERICSERV; /* Wild card address */
1249 GNUNET_assert (0 == getaddrinfo (NULL,
1250 open_port_str,
1251 &hint,
1252 &ret));
1253 bind_status = GNUNET_NO;
1254 for (ai = ret; NULL != ai; ai = ai->ai_next)
1255 {
1256 socket = GNUNET_NETWORK_socket_create (ai->ai_family,
1257 ai->ai_socktype,
1258 ai->ai_protocol);
1259 if (NULL == socket)
1260 continue;
1261 bind_status = GNUNET_NETWORK_socket_bind (socket,
1262 ai->ai_addr,
1263 ai->ai_addrlen);
1264 GNUNET_NETWORK_socket_close (socket);
1265 if (GNUNET_OK != bind_status)
1266 break;
1267 }
1268 freeaddrinfo (ret);
1269 return bind_status;
1270}
1271
1272
1273/**
1274 * Check if sockets or pipes meet certain conditions
1275 *
1276 * @param rfds set of sockets or pipes to be checked for readability
1277 * @param wfds set of sockets or pipes to be checked for writability
1278 * @param efds set of sockets or pipes to be checked for exceptions
1279 * @param timeout relative value when to return
1280 * @return number of selected sockets or pipes, #GNUNET_SYSERR on error
1281 */
1282int
1283GNUNET_NETWORK_socket_select (struct GNUNET_NETWORK_FDSet *rfds,
1284 struct GNUNET_NETWORK_FDSet *wfds,
1285 struct GNUNET_NETWORK_FDSet *efds,
1286 const struct GNUNET_TIME_Relative timeout)
1287{
1288 int nfds;
1289 struct timeval tv;
1290
1291 if (NULL != rfds)
1292 nfds = rfds->nsds;
1293 else
1294 nfds = 0;
1295 if (NULL != wfds)
1296 nfds = GNUNET_MAX (nfds,
1297 wfds->nsds);
1298 if (NULL != efds)
1299 nfds = GNUNET_MAX (nfds,
1300 efds->nsds);
1301 if ((0 == nfds) &&
1302 (timeout.rel_value_us == GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us))
1303 {
1304 GNUNET_break (0);
1305 LOG (GNUNET_ERROR_TYPE_ERROR,
1306 _ (
1307 "Fatal internal logic error, process hangs in `%s' (abort with CTRL-C)!\n"),
1308 "select");
1309 }
1310 if (timeout.rel_value_us / GNUNET_TIME_UNIT_SECONDS.rel_value_us > (unsigned
1311 long long)
1312 LONG_MAX)
1313 {
1314 tv.tv_sec = LONG_MAX;
1315 tv.tv_usec = 999999L;
1316 }
1317 else
1318 {
1319 tv.tv_sec = (long) (timeout.rel_value_us
1320 / GNUNET_TIME_UNIT_SECONDS.rel_value_us);
1321 tv.tv_usec =
1322 (timeout.rel_value_us
1323 - (tv.tv_sec * GNUNET_TIME_UNIT_SECONDS.rel_value_us));
1324 }
1325 return select (nfds,
1326 (NULL != rfds) ? &rfds->sds : NULL,
1327 (NULL != wfds) ? &wfds->sds : NULL,
1328 (NULL != efds) ? &efds->sds : NULL,
1329 (timeout.rel_value_us ==
1330 GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us) ? NULL : &tv);
1331}
1332
1333
1334/* end of network.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-19 22:28:48 +0000