2 This file is part of GNUnet.
3 (C) 2009 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 2, or (at your
8 option) any later version.
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 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file util/network.c
23 * @brief basic, low-level networking interface
28 #include "gnunet_disk_lib.h"
30 #include "gnunet_container_lib.h"
32 #define DEBUG_NETWORK GNUNET_NO
34 #ifndef INVALID_SOCKET
35 #define INVALID_SOCKET -1
39 struct GNUNET_NETWORK_Handle
49 struct GNUNET_NETWORK_FDSet
53 * Maximum number of any socket socket descriptor in the set
58 * Bitset with the descriptors.
64 * Linked list of handles
66 struct GNUNET_CONTAINER_SList *handles;
72 #define FD_COPY(s, d) (memcpy ((d), (s), sizeof (fd_set)))
77 * Set if a socket should use blocking or non-blocking IO.
79 * @param doBlock blocking mode
80 * @return GNUNET_OK on success, GNUNET_SYSERR on error
83 socket_set_blocking (struct GNUNET_NETWORK_Handle *fd, int doBlock)
89 if (ioctlsocket (fd->fd, FIONBIO, &mode) == SOCKET_ERROR)
92 SetErrnoFromWinsockError (WSAGetLastError ());
93 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "ioctlsocket");
100 int flags = fcntl (fd->fd, F_GETFL);
104 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "fcntl");
105 return GNUNET_SYSERR;
108 flags &= ~O_NONBLOCK;
112 if (0 != fcntl (fd->fd, F_SETFL, flags))
115 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "fcntl");
116 return GNUNET_SYSERR;
125 * Make a socket non-inheritable to child processes
127 * @param h the socket to make non-inheritable
128 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
129 * @warning Not implemented on Windows
132 socket_set_inheritable (const struct GNUNET_NETWORK_Handle *h)
135 i = fcntl (h->fd, F_GETFD);
136 if (i == (i | FD_CLOEXEC))
138 return (fcntl (h->fd, F_SETFD, i | FD_CLOEXEC) == 0)
139 ? GNUNET_OK : GNUNET_SYSERR;
146 * The MSG_NOSIGNAL equivalent on Mac OS X
148 * @param h the socket to make non-delaying
151 socket_set_nosigpipe (const struct GNUNET_NETWORK_Handle *h)
155 setsockopt (h->fd, SOL_SOCKET, SO_NOSIGPIPE, &value, sizeof (value)))
156 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "setsockopt");
162 * Disable delays when sending data via the socket.
163 * (GNUnet makes sure that messages are as big as
166 * @param h the socket to make non-delaying
169 socket_set_nodelay (const struct GNUNET_NETWORK_Handle *h)
173 setsockopt (h->fd, IPPROTO_TCP, TCP_NODELAY, &value, sizeof (value)))
174 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "setsockopt");
179 * accept a new connection on a socket
181 * @param desc bound socket
182 * @param address address of the connecting peer, may be NULL
183 * @param address_len length of address
184 * @return client socket
186 struct GNUNET_NETWORK_Handle *
187 GNUNET_NETWORK_socket_accept (const struct GNUNET_NETWORK_Handle *desc,
188 struct sockaddr *address,
189 socklen_t * address_len)
191 struct GNUNET_NETWORK_Handle *ret;
192 ret = GNUNET_malloc (sizeof (struct GNUNET_NETWORK_Handle));
193 ret->fd = accept (desc->fd, address, address_len);
194 if (ret->fd == INVALID_SOCKET)
197 SetErrnoFromWinsockError (WSAGetLastError ());
203 if (ret->fd >= FD_SETSIZE)
205 GNUNET_break (0 == close (ret->fd));
211 if (GNUNET_SYSERR == socket_set_blocking (ret, GNUNET_NO))
215 /* we might want to treat this one as fatal... */
217 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (ret));
222 if (GNUNET_OK != socket_set_inheritable (ret))
223 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
224 "socket_set_inheritable");
227 socket_set_nosigpipe (ret);
230 if (address->sa_family != AF_UNIX)
232 socket_set_nodelay (ret);
238 * Bind to a connected socket
240 * @param address address to be bound
241 * @param address_len length of address
242 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
245 GNUNET_NETWORK_socket_bind (struct GNUNET_NETWORK_Handle *desc,
246 const struct sockaddr *address,
247 socklen_t address_len)
251 ret = bind (desc->fd, address, address_len);
253 if (SOCKET_ERROR == ret)
254 SetErrnoFromWinsockError (WSAGetLastError ());
256 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
263 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
266 GNUNET_NETWORK_socket_close (struct GNUNET_NETWORK_Handle *desc)
272 ret = closesocket (desc->fd);
273 SetErrnoFromWinsockError (WSAGetLastError ());
275 ret = close (desc->fd);
280 return (ret == 0) ? GNUNET_OK : GNUNET_SYSERR;
287 * @param address peer address
288 * @param address_len length of address
289 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
292 GNUNET_NETWORK_socket_connect (const struct GNUNET_NETWORK_Handle *desc,
293 const struct sockaddr *address,
294 socklen_t address_len)
297 ret = connect (desc->fd, address, address_len);
300 if (SOCKET_ERROR == ret)
303 SetErrnoFromWinsockError (WSAGetLastError ());
304 if (errno == EWOULDBLOCK)
308 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
316 * @param level protocol level of the option
317 * @param optname identifier of the option
318 * @param optval options
319 * @param optlen length of optval
320 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
323 GNUNET_NETWORK_socket_getsockopt (const struct GNUNET_NETWORK_Handle *desc,
324 int level, int optname, void *optval,
328 ret = getsockopt (desc->fd, level, optname, optval, optlen);
331 if (ret == 0 && level == SOL_SOCKET && optname == SO_ERROR)
332 *((int *) optval) = GetErrnoFromWinsockError (*((int *) optval));
334 else if (SOCKET_ERROR == ret)
335 SetErrnoFromWinsockError (WSAGetLastError ());
338 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
345 * @param backlog length of the listen queue
346 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
349 GNUNET_NETWORK_socket_listen (const struct GNUNET_NETWORK_Handle *desc,
353 ret = listen (desc->fd, backlog);
356 if (SOCKET_ERROR == ret)
357 SetErrnoFromWinsockError (WSAGetLastError ());
360 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
365 * How much data is available to be read on this descriptor?
367 * Returns GNUNET_NO if no data is available, or on error!
371 GNUNET_NETWORK_socket_recvfrom_amount (const struct GNUNET_NETWORK_Handle
377 /* How much is there to be read? */
379 error = ioctl (desc->fd, FIONREAD, &pending);
382 error = ioctlsocket (desc->fd, FIONREAD, &pending);
383 if (error != SOCKET_ERROR)
391 * Read data from a connected socket (always non-blocking).
393 * @param buffer buffer
394 * @param length length of buffer
395 * @param src_addr either the source to recv from, or all zeroes
396 * to be filled in by recvfrom
397 * @param addrlen length of the addr
400 GNUNET_NETWORK_socket_recvfrom (const struct GNUNET_NETWORK_Handle * desc,
401 void *buffer, size_t length,
402 struct sockaddr * src_addr,
410 flags |= MSG_DONTWAIT;
413 ret = recvfrom (desc->fd, buffer, length, flags, src_addr, addrlen);
415 if (SOCKET_ERROR == ret)
416 SetErrnoFromWinsockError (WSAGetLastError ());
423 * Read data from a connected socket (always non-blocking).
425 * @param buffer buffer
426 * @param length length of buffer
429 GNUNET_NETWORK_socket_recv (const struct GNUNET_NETWORK_Handle * desc,
430 void *buffer, size_t length)
437 flags |= MSG_DONTWAIT;
439 ret = recv (desc->fd, buffer, length, flags);
441 if (SOCKET_ERROR == ret)
442 SetErrnoFromWinsockError (WSAGetLastError ());
449 * Send data (always non-blocking).
452 * @param buffer data to send
453 * @param length size of the buffer
454 * @return number of bytes sent, GNUNET_SYSERR on error
457 GNUNET_NETWORK_socket_send (const struct GNUNET_NETWORK_Handle * desc,
458 const void *buffer, size_t length)
465 flags |= MSG_DONTWAIT;
469 flags |= MSG_NOSIGNAL;
472 ret = send (desc->fd, buffer, length, flags);
475 if (SOCKET_ERROR == ret)
476 SetErrnoFromWinsockError (WSAGetLastError ());
484 * Send data to a particular destination (always non-blocking).
485 * This function only works for UDP sockets.
488 * @param message data to send
489 * @param length size of the data
490 * @param dest_addr destination address
491 * @param dest_len length of address
492 * @return number of bytes sent, GNUNET_SYSERR on error
495 GNUNET_NETWORK_socket_sendto (const struct GNUNET_NETWORK_Handle * desc,
496 const void *message, size_t length,
497 const struct sockaddr * dest_addr,
505 flags |= MSG_DONTWAIT;
508 flags |= MSG_NOSIGNAL;
510 ret = sendto (desc->fd, message, length, flags, dest_addr, dest_len);
512 if (SOCKET_ERROR == ret)
513 SetErrnoFromWinsockError (WSAGetLastError ());
522 * @param level protocol level of the option
523 * @param option_name option identifier
524 * @param option_value value to set
525 * @param option_len size of option_value
526 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
529 GNUNET_NETWORK_socket_setsockopt (struct GNUNET_NETWORK_Handle *fd,
530 int level, int option_name,
531 const void *option_value,
532 socklen_t option_len)
536 ret = setsockopt (fd->fd, level, option_name, option_value, option_len);
538 if (SOCKET_ERROR == ret)
539 SetErrnoFromWinsockError (WSAGetLastError ());
541 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
546 * Create a new socket. Configure it for non-blocking IO and
547 * mark it as non-inheritable to child processes (set the
548 * close-on-exec flag).
550 * @param domain domain of the socket
551 * @param type socket type
552 * @param protocol network protocol
553 * @return new socket, NULL on error
555 struct GNUNET_NETWORK_Handle *
556 GNUNET_NETWORK_socket_create (int domain, int type, int protocol)
558 struct GNUNET_NETWORK_Handle *ret;
559 ret = GNUNET_malloc (sizeof (struct GNUNET_NETWORK_Handle));
560 ret->fd = socket (domain, type, protocol);
561 if (INVALID_SOCKET == ret->fd)
564 SetErrnoFromWinsockError (WSAGetLastError ());
571 if (ret->fd >= FD_SETSIZE)
573 GNUNET_break (0 == close (ret->fd));
580 if (GNUNET_SYSERR == socket_set_blocking (ret, GNUNET_NO))
582 /* we might want to treat this one as fatal... */
584 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (ret));
589 if (GNUNET_OK != socket_set_inheritable (ret))
590 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
591 "socket_set_inheritable");
594 socket_set_nosigpipe (ret);
596 if ( (type == SOCK_STREAM)
598 && (domain != AF_UNIX)
601 socket_set_nodelay (ret);
607 * Shut down socket operations
609 * @param how type of shutdown
610 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
613 GNUNET_NETWORK_socket_shutdown (struct GNUNET_NETWORK_Handle *desc, int how)
617 ret = shutdown (desc->fd, how);
620 SetErrnoFromWinsockError (WSAGetLastError ());
622 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
631 GNUNET_NETWORK_fdset_zero (struct GNUNET_NETWORK_FDSet *fds)
636 GNUNET_CONTAINER_slist_clear (fds->handles);
641 * Add a socket to the FD set
643 * @param desc socket to add
646 GNUNET_NETWORK_fdset_set (struct GNUNET_NETWORK_FDSet *fds,
647 const struct GNUNET_NETWORK_Handle *desc)
649 FD_SET (desc->fd, &fds->sds);
650 if (desc->fd + 1 > fds->nsds)
651 fds->nsds = desc->fd + 1;
656 * Check whether a socket is part of the fd set
659 * @return 0 if the FD is not set
662 GNUNET_NETWORK_fdset_isset (const struct GNUNET_NETWORK_FDSet *fds,
663 const struct GNUNET_NETWORK_Handle *desc)
665 return FD_ISSET (desc->fd, &fds->sds);
670 * Add one fd set to another
671 * @param dst the fd set to add to
672 * @param src the fd set to add from
675 GNUNET_NETWORK_fdset_add (struct GNUNET_NETWORK_FDSet *dst,
676 const struct GNUNET_NETWORK_FDSet *src)
679 for (nfds = src->nsds; nfds > 0; nfds--)
680 if (FD_ISSET (nfds, &src->sds))
683 FD_SET (nfds, &dst->sds);
684 if (nfds + 1 > dst->nsds)
685 dst->nsds = nfds + 1;
688 GNUNET_CONTAINER_slist_append (dst->handles, src->handles);
694 * Copy one fd set to another
696 * @param to destination
700 GNUNET_NETWORK_fdset_copy (struct GNUNET_NETWORK_FDSet *to,
701 const struct GNUNET_NETWORK_FDSet *from)
703 FD_COPY (&from->sds, &to->sds);
704 to->nsds = from->nsds;
707 GNUNET_CONTAINER_slist_clear (to->handles);
708 GNUNET_CONTAINER_slist_append (to->handles, from->handles);
713 GNUNET_NETWORK_get_fd (struct GNUNET_NETWORK_Handle *desc)
719 * Copy a native fd set
721 * @param to destination
722 * @param from native source set
723 * @param nfds the biggest socket number in from + 1
726 GNUNET_NETWORK_fdset_copy_native (struct GNUNET_NETWORK_FDSet *to,
727 const fd_set * from, int nfds)
729 FD_COPY (from, &to->sds);
735 * Set a native fd in a set
737 * @param to destination
738 * @param nfd native FD to set
740 void GNUNET_NETWORK_fdset_set_native (struct GNUNET_NETWORK_FDSet *to,
743 FD_SET (nfd, &to->sds);
744 to->nsds = GNUNET_MAX (nfd + 1, to->nsds);
749 * Add a file handle to the fd set
751 * @param h the file handle to add
754 GNUNET_NETWORK_fdset_handle_set (struct GNUNET_NETWORK_FDSet *fds,
755 const struct GNUNET_DISK_FileHandle *h)
760 GNUNET_DISK_internal_file_handle_ (h, &hw, sizeof (HANDLE));
761 GNUNET_CONTAINER_slist_add (fds->handles,
762 GNUNET_CONTAINER_SLIST_DISPOSITION_TRANSIENT,
763 &hw, sizeof (HANDLE));
767 GNUNET_DISK_internal_file_handle_ (h, &fd, sizeof (int));
768 FD_SET (fd, &fds->sds);
769 if (fd + 1 > fds->nsds)
777 * Check if a file handle is part of an fd set
779 * @param h file handle
780 * @return GNUNET_YES if the file handle is part of the set
783 GNUNET_NETWORK_fdset_handle_isset (const struct GNUNET_NETWORK_FDSet *fds,
784 const struct GNUNET_DISK_FileHandle *h)
788 return GNUNET_CONTAINER_slist_contains (fds->handles, &h->h,
791 return FD_ISSET (h->fd, &fds->sds);
797 * Checks if two fd sets overlap
798 * @param fds1 first fd set
799 * @param fds2 second fd set
800 * @return GNUNET_YES if they do overlap, GNUNET_NO otherwise
803 GNUNET_NETWORK_fdset_overlap (const struct GNUNET_NETWORK_FDSet *fds1,
804 const struct GNUNET_NETWORK_FDSet *fds2)
808 if (nfds < fds2->nsds)
810 for (; nfds >= 0; nfds--)
811 if (FD_ISSET (nfds, &fds1->sds) && FD_ISSET (nfds, &fds2->sds))
815 struct GNUNET_CONTAINER_SList_Iterator *it;
817 for (it = GNUNET_CONTAINER_slist_begin (fds1->handles);
818 GNUNET_CONTAINER_slist_end (it) != GNUNET_YES;
819 GNUNET_CONTAINER_slist_next (it))
823 h = GNUNET_CONTAINER_slist_get (it, NULL);
824 if (GNUNET_CONTAINER_slist_contains
825 (fds2->handles, h, sizeof (HANDLE)))
827 GNUNET_CONTAINER_slist_iter_destroy (it);
831 GNUNET_CONTAINER_slist_iter_destroy (it);
840 * @return a new fd set
842 struct GNUNET_NETWORK_FDSet *
843 GNUNET_NETWORK_fdset_create ()
845 struct GNUNET_NETWORK_FDSet *fds;
846 fds = GNUNET_malloc (sizeof (struct GNUNET_NETWORK_FDSet));
848 fds->handles = GNUNET_CONTAINER_slist_create ();
850 GNUNET_NETWORK_fdset_zero (fds);
856 * Releases the associated memory of an fd set
860 GNUNET_NETWORK_fdset_destroy (struct GNUNET_NETWORK_FDSet *fds)
863 GNUNET_CONTAINER_slist_destroy (fds->handles);
869 * Check if sockets meet certain conditions
870 * @param rfds set of sockets to be checked for readability
871 * @param wfds set of sockets to be checked for writability
872 * @param efds set of sockets to be checked for exceptions
873 * @param timeout relative value when to return
874 * @return number of selected sockets, GNUNET_SYSERR on error
877 GNUNET_NETWORK_socket_select (struct GNUNET_NETWORK_FDSet *rfds,
878 struct GNUNET_NETWORK_FDSet *wfds,
879 struct GNUNET_NETWORK_FDSet *efds,
880 const struct GNUNET_TIME_Relative timeout)
894 handles = GNUNET_CONTAINER_slist_count (rfds->handles);
899 nfds = GNUNET_MAX (nfds, wfds->nsds);
901 handles += GNUNET_CONTAINER_slist_count (wfds->handles);
906 nfds = GNUNET_MAX (nfds, efds->nsds);
908 handles += GNUNET_CONTAINER_slist_count (efds->handles);
913 tv.tv_sec = timeout.value / GNUNET_TIME_UNIT_SECONDS.value;
915 1000 * (timeout.value - (tv.tv_sec * GNUNET_TIME_UNIT_SECONDS.value));
916 if ((nfds == 0) && (timeout.value == GNUNET_TIME_UNIT_FOREVER_REL.value)
922 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
924 ("Fatal internal logic error, process hangs in `%s' (abort with CTRL-C)!\n"),
929 return select (nfds + 1,
930 (rfds != NULL) ? &rfds->sds : NULL,
931 (wfds != NULL) ? &wfds->sds : NULL,
932 (efds != NULL) ? &efds->sds : NULL,
933 (timeout.value == GNUNET_TIME_UNIT_FOREVER_REL.value)
938 fd_set sock_read, sock_write, sock_except;
939 fd_set aread, awrite, aexcept;
940 struct GNUNET_CONTAINER_SList *handles_read, *handles_write,
944 struct timeval tvslice;
948 #define SAFE_FD_ISSET(fd, set) (set != NULL && FD_ISSET(fd, set))
950 /* calculate how long we need to wait in milliseconds */
951 if (timeout.value == GNUNET_TIME_UNIT_FOREVER_REL.value)
955 ms_total = timeout.value / GNUNET_TIME_UNIT_MILLISECONDS.value;
957 /* select() may be used as a portable way to sleep */
958 if (!(rfds || wfds || efds))
965 handles_read = GNUNET_CONTAINER_slist_create ();
966 handles_write = GNUNET_CONTAINER_slist_create ();
967 handles_except = GNUNET_CONTAINER_slist_create ();
970 sock_read = rfds->sds;
972 FD_ZERO (&sock_read);
974 sock_write = wfds->sds;
976 FD_ZERO (&sock_write);
978 sock_except = efds->sds;
980 FD_ZERO (&sock_except);
982 /* multiplex between winsock select() and waiting on the handles */
986 limit = GetTickCount () + ms_total;
995 /* overwrite the zero'd sets here; the select call
996 * will clear those that are not active */
997 FD_COPY (&sock_read, &aread);
998 FD_COPY (&sock_write, &awrite);
999 FD_COPY (&sock_except, &aexcept);
1001 tvslice.tv_usec = 100000;
1003 select (nfds + 1, &aread, &awrite, &aexcept,
1004 &tvslice)) == SOCKET_ERROR)
1007 SetErrnoFromWinsockError (WSAGetLastError ());
1008 if (errno == ENOTSOCK)
1012 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "select");
1015 goto select_loop_end;
1019 /* Poll read pipes */
1023 struct GNUNET_CONTAINER_SList_Iterator *i;
1024 for (i = GNUNET_CONTAINER_slist_begin (rfds->handles);
1025 GNUNET_CONTAINER_slist_end (i) != GNUNET_YES;
1026 GNUNET_CONTAINER_slist_next (i))
1031 h = *(HANDLE *) GNUNET_CONTAINER_slist_get (i, NULL);
1032 if (!PeekNamedPipe (h, NULL, 0, NULL, &dwBytes, NULL))
1035 SetErrnoFromWinError (GetLastError ());
1038 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
1042 goto select_loop_end;
1047 GNUNET_CONTAINER_slist_add (handles_read,
1048 GNUNET_CONTAINER_SLIST_DISPOSITION_TRANSIENT,
1049 &h, sizeof (HANDLE));
1053 GNUNET_CONTAINER_slist_iter_destroy (i);
1056 /* Poll for faulty pipes */
1060 struct GNUNET_CONTAINER_SList_Iterator *i;
1061 for (i = GNUNET_CONTAINER_slist_begin (efds->handles);
1062 GNUNET_CONTAINER_slist_end (i) != GNUNET_YES;
1063 GNUNET_CONTAINER_slist_next (i))
1068 h = *(HANDLE *) GNUNET_CONTAINER_slist_get (i, NULL);
1069 if (!PeekNamedPipe (h, NULL, 0, NULL, &dwBytes, NULL))
1072 GNUNET_CONTAINER_slist_add (handles_except,
1073 GNUNET_CONTAINER_SLIST_DISPOSITION_TRANSIENT,
1074 &h, sizeof (HANDLE));
1078 GNUNET_CONTAINER_slist_iter_destroy (i);
1083 GNUNET_CONTAINER_slist_append (handles_write, wfds->handles);
1084 retcode += GNUNET_CONTAINER_slist_count (wfds->handles);
1087 /* Check for closed sockets */
1088 for (i = 0; i < nfds; i++)
1091 if (SAFE_FD_ISSET (i, &sock_read))
1094 struct sockaddr addr;
1096 if (getpeername (i, &addr, &len) == SOCKET_ERROR)
1102 (i, SOL_SOCKET, SO_ERROR, (char *) &err, &len) == 0
1103 && err == WSAENOTCONN)
1106 if (!SAFE_FD_ISSET (i, &aread))
1117 if (retcode == 0 && nfds == 0)
1118 Sleep (GNUNET_MIN (100, limit - GetTickCount ()));
1120 while (retcode == 0 && (ms_total == INFINITE || GetTickCount () < limit));
1128 GNUNET_NETWORK_fdset_zero (rfds);
1129 GNUNET_NETWORK_fdset_copy_native (rfds, &aread, retcode);
1130 GNUNET_CONTAINER_slist_clear (rfds->handles);
1131 GNUNET_CONTAINER_slist_append (rfds->handles, handles_read);
1137 GNUNET_NETWORK_fdset_zero (wfds);
1138 GNUNET_NETWORK_fdset_copy_native (wfds, &awrite, retcode);
1139 GNUNET_CONTAINER_slist_clear (wfds->handles);
1140 GNUNET_CONTAINER_slist_append (wfds->handles, handles_write);
1145 GNUNET_NETWORK_fdset_zero (efds);
1146 GNUNET_NETWORK_fdset_copy_native (efds, &aexcept, retcode);
1147 GNUNET_CONTAINER_slist_clear (efds->handles);
1148 GNUNET_CONTAINER_slist_append (efds->handles, handles_except);
1152 GNUNET_CONTAINER_slist_destroy (handles_read);
1153 GNUNET_CONTAINER_slist_destroy (handles_write);
1154 GNUNET_CONTAINER_slist_destroy (handles_except);
1161 /* end of network.c */