2 This file is part of GNUnet.
\r
3 (C) 2009 Christian Grothoff (and other contributing authors)
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5 GNUnet is free software; you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published
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7 by the Free Software Foundation; either version 2, or (at your
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8 option) any later version.
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10 GNUnet is distributed in the hope that it will be useful, but
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 General Public License for more details.
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15 You should have received a copy of the GNU General Public License
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16 along with GNUnet; see the file COPYING. If not, write to the
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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18 Boston, MA 02111-1307, USA.
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22 * @file util/network.c
\r
23 * @brief basic, low-level networking interface
\r
24 * @author Nils Durner
\r
27 #include "platform.h"
\r
28 #include "gnunet_disk_lib.h"
\r
30 #include "gnunet_container_lib.h"
\r
32 #define DEBUG_NETWORK GNUNET_NO
\r
34 #ifndef INVALID_SOCKET
\r
35 #define INVALID_SOCKET -1
\r
37 \rstruct GNUNET_NETWORK_Handle
\r
41 \r\rstruct GNUNET_NETWORK_FDSet
\r
44 /* socket descriptors */
\r
50 struct GNUNET_CONTAINER_SList *handles;
56 #define FD_COPY(s, d) (memcpy ((d), (s), sizeof (fd_set)))
\r
60 * Set if a socket should use blocking or non-blocking IO.
\r
62 * @param doBlock blocking mode
\r
63 * @return GNUNET_OK on success, GNUNET_SYSERR on error
\r
66 socket_set_blocking (struct GNUNET_NETWORK_Handle *fd,
\rint doBlock)
\r
72 \rif (ioctlsocket (fd->fd, FIONBIO, &mode) == SOCKET_ERROR)
75 \rSetErrnoFromWinsockError (WSAGetLastError ());
76 \rGNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "ioctlsocket");
77 \rreturn GNUNET_SYSERR;
83 int flags = fcntl (fd->fd, F_GETFL);
87 \rGNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "fcntl");
88 \rreturn GNUNET_SYSERR;
91 \rflags &= ~O_NONBLOCK;
94 \rflags |= O_NONBLOCK;
95 \rif (0 != fcntl (fd->fd, F_SETFL, flags))
98 \rGNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "fcntl");
99 \rreturn GNUNET_SYSERR;
109 * Make a socket non-inheritable to child processes
\r
111 * @param h the socket to make non-inheritable
\r
112 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
\r
113 * @warning Not implemented on Windows
\r
116 socket_set_inheritable (const struct GNUNET_NETWORK_Handle
\r*h)
\r
119 \r\ri = fcntl (h->fd, F_GETFD);
120 \rif (i == (i | FD_CLOEXEC))
122 \rreturn (fcntl (h->fd, F_SETFD, i | FD_CLOEXEC) == 0)
\r
123 ? GNUNET_OK : GNUNET_SYSERR;
131 * The MSG_NOSIGNAL equivalent on Mac OS X
\r
133 * @param h the socket to make non-delaying
\r
136 socket_set_nosigpipe (const struct GNUNET_NETWORK_Handle
\r*h)
\r
140 setsockopt (h->fd, SOL_SOCKET, SO_NOSIGPIPE, &value, sizeof (value)))
141 \rGNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
\r"setsockopt");
148 * Disable delays when sending data via the socket.
\r
149 * (GNUnet makes sure that messages are as big as
\r
150 * possible already).
\r
152 * @param h the socket to make non-delaying
\r
155 socket_set_nodelay (const struct GNUNET_NETWORK_Handle
\r*h)
\r
159 setsockopt (h->fd, IPPROTO_TCP, TCP_NODELAY, &value, sizeof (value)))
160 \rGNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
\r"setsockopt");
165 * accept a new connection on a socket
\r
167 * @param desc bound socket
\r
168 * @param address address of the connecting peer, may be NULL
\r
169 * @param address_len length of address
\r
170 * @return client socket
\r
172 struct GNUNET_NETWORK_Handle *
\r
173 GNUNET_NETWORK_socket_accept (const struct GNUNET_NETWORK_Handle *desc,
174 \rstruct sockaddr *address,
175 \rsocklen_t * address_len)
\r
177 \rstruct GNUNET_NETWORK_Handle *ret;
178 \r\rret = GNUNET_malloc (sizeof (struct GNUNET_NETWORK_Handle));
179 \rret->fd = accept (desc->fd, address, address_len);
180 \rif (ret->fd == INVALID_SOCKET)
185 SetErrnoFromWinsockError (WSAGetLastError ());
193 if (ret->fd >= FD_SETSIZE)
196 \rGNUNET_break (0 == close (ret->fd));
203 if (GNUNET_SYSERR == socket_set_blocking (ret, GNUNET_NO))
207 /* we might want to treat this one as fatal... */
\r
209 \rGNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (ret));
214 if (GNUNET_OK != socket_set_inheritable (ret))
215 \rGNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
216 \r"socket_set_inheritable");
220 socket_set_nosigpipe (ret);
223 socket_set_nodelay (ret);
229 * Bind to a connected socket
\r
230 * @param desc socket
\r
231 * @param address address to be bound
\r
232 * @param address_len length of address
\r
233 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
\r
236 GNUNET_NETWORK_socket_bind (struct GNUNET_NETWORK_Handle *desc,
237 \rconst struct sockaddr *address,
238 \rsocklen_t address_len)
\r
241 \r\rret = bind (desc->fd, address, address_len);
244 if (SOCKET_ERROR == ret)
245 \rSetErrnoFromWinsockError (WSAGetLastError ());
248 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
254 * @param desc socket
\r
255 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
\r
258 GNUNET_NETWORK_socket_close (struct GNUNET_NETWORK_Handle *desc)
\r
264 ret = closesocket (desc->fd);
265 \rSetErrnoFromWinsockError (WSAGetLastError ());
268 ret = close (desc->fd);
272 \rGNUNET_free (desc);
274 \rreturn (ret == 0) ? GNUNET_OK : GNUNET_SYSERR;
280 * @param desc socket
\r
281 * @param address peer address
\r
282 * @param address_len length of address
\r
283 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
\r
286 GNUNET_NETWORK_socket_connect (const struct GNUNET_NETWORK_Handle *desc,
287 \rconst struct sockaddr *address,
288 \rsocklen_t address_len)
\r
291 \r\rret = connect (desc->fd, address, address_len);
294 if (SOCKET_ERROR == ret)
297 \rSetErrnoFromWinsockError (WSAGetLastError ());
298 \rif (errno == EWOULDBLOCK)
299 \rerrno = EINPROGRESS;
303 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
308 * Get socket options
\r
310 * @param desc socket
\r
311 * @param level protocol level of the option
\r
312 * @param optname identifier of the option
\r
313 * @param optval options
\r
314 * @param optlen length of optval
\r
315 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
\r
318 GNUNET_NETWORK_socket_getsockopt (const struct GNUNET_NETWORK_Handle *desc,
319 \rint level, int optname, void *optval,
320 \rsocklen_t * optlen)
\r
323 \r\rret = getsockopt (desc->fd, level, optname, optval, optlen);
326 if (ret == 0 && level == SOL_SOCKET && optname == SO_ERROR)
327 \r*((int *) optval) = GetErrnoFromWinsockError (*((int *) optval));
329 else if (SOCKET_ERROR == ret)
330 \rSetErrnoFromWinsockError (WSAGetLastError ());
333 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
338 * Listen on a socket
\r
339 * @param desc socket
\r
340 * @param backlog length of the listen queue
\r
341 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
\r
344 GNUNET_NETWORK_socket_listen (const struct GNUNET_NETWORK_Handle *desc,
348 \r\rret = listen (desc->fd, backlog);
351 if (SOCKET_ERROR == ret)
352 \rSetErrnoFromWinsockError (WSAGetLastError ());
355 \rreturn ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
360 * Read data from a connected socket (always non-blocking).
\r
361 * @param desc socket
\r
362 * @param buffer buffer
\r
363 * @param length length of buffer
\r
366 GNUNET_NETWORK_socket_recv (const struct GNUNET_NETWORK_Handle * desc,
367 \rvoid *buffer, size_t length)
\r
373 #ifdef MSG_DONTWAIT
\r
374 flags |= MSG_DONTWAIT;
377 ret = recv (desc->fd, buffer, length, flags);
380 if (SOCKET_ERROR == ret)
381 \rSetErrnoFromWinsockError (WSAGetLastError ());
389 * Send data (always non-blocking).
\r
391 * @param desc socket
\r
392 * @param buffer data to send
\r
393 * @param length size of the buffer
\r
394 * @return number of bytes sent, GNUNET_SYSERR on error
\r
397 GNUNET_NETWORK_socket_send (const struct GNUNET_NETWORK_Handle * desc,
398 \rconst void *buffer, size_t length)
\r
404 #ifdef MSG_DONTWAIT
\r
405 flags |= MSG_DONTWAIT;
408 #ifdef MSG_NOSIGNAL
\r
409 flags |= MSG_NOSIGNAL;
412 ret = send (desc->fd, buffer, length, flags);
415 if (SOCKET_ERROR == ret)
416 \rSetErrnoFromWinsockError (WSAGetLastError ());
424 * Send data to a particular destination (always non-blocking).
\r
425 * This function only works for UDP sockets.
\r
427 * @param desc socket
\r
428 * @param message data to send
\r
429 * @param length size of the data
\r
430 * @param dest_addr destination address
\r
431 * @param dest_len length of address
\r
432 * @return number of bytes sent, GNUNET_SYSERR on error
\r
435 GNUNET_NETWORK_socket_sendto (const struct GNUNET_NETWORK_Handle * desc,
436 \rconst void *message, size_t length,
437 \rconst struct sockaddr * dest_addr,
438 \rsocklen_t dest_len)
\r
444 #ifdef MSG_DONTWAIT
\r
445 flags |= MSG_DONTWAIT;
448 #ifdef MSG_NOSIGNAL
\r
449 flags |= MSG_NOSIGNAL;
452 ret = sendto (desc->fd, message, length, flags, dest_addr, dest_len);
455 if (SOCKET_ERROR == ret)
456 \rSetErrnoFromWinsockError (WSAGetLastError ());
464 * Set socket option
\r
466 * @param level protocol level of the option
\r
467 * @param option_name option identifier
\r
468 * @param option_value value to set
\r
469 * @param option_len size of option_value
\r
470 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
\r
473 GNUNET_NETWORK_socket_setsockopt (struct GNUNET_NETWORK_Handle *fd,
474 \rint level, int option_name,
475 \rconst void *option_value,
476 \rsocklen_t option_len)
\r
479 \r\rret = setsockopt (fd->fd, level, option_name, option_value, option_len);
482 if (SOCKET_ERROR == ret)
483 \rSetErrnoFromWinsockError (WSAGetLastError ());
486 \rreturn ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
491 * Create a new socket. Configure it for non-blocking IO and
\r
492 * mark it as non-inheritable to child processes (set the
\r
493 * close-on-exec flag).
\r
495 * @param domain domain of the socket
\r
496 * @param type socket type
\r
497 * @param protocol network protocol
\r
498 * @return new socket, NULL on error
\r
500 struct GNUNET_NETWORK_Handle *
\r
501 GNUNET_NETWORK_socket_create (int domain, int type, int protocol)
\r
503 \rstruct GNUNET_NETWORK_Handle *ret;
504 \r\rret = GNUNET_malloc (sizeof (struct GNUNET_NETWORK_Handle));
505 \rret->fd = socket (domain, type, protocol);
506 \rif (INVALID_SOCKET == ret->fd)
511 SetErrnoFromWinsockError (WSAGetLastError ());
519 if (ret->fd >= FD_SETSIZE)
522 \rGNUNET_break (0 == close (ret->fd));
529 \rif (GNUNET_SYSERR == socket_set_blocking (ret, GNUNET_NO))
533 /* we might want to treat this one as fatal... */
\r
535 \rGNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (ret));
540 if (GNUNET_OK != socket_set_inheritable (ret))
541 \rGNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
542 \r"socket_set_inheritable");
546 socket_set_nosigpipe (ret);
549 if (type == SOCK_STREAM)
550 \rsocket_set_nodelay (ret);
556 * Shut down socket operations
\r
557 * @param desc socket
\r
558 * @param how type of shutdown
\r
559 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
\r
562 GNUNET_NETWORK_socket_shutdown (struct GNUNET_NETWORK_Handle *desc,
566 \r\rret = shutdown (desc->fd, how);
570 \rSetErrnoFromWinsockError (WSAGetLastError ());
573 \rreturn ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
579 * @param fds fd set
\r
582 GNUNET_NETWORK_fdset_zero (struct GNUNET_NETWORK_FDSet *fds)
\r
584 \rFD_ZERO (&fds->sds);
588 GNUNET_CONTAINER_slist_clear (fds->handles);
594 * Add a socket to the FD set
\r
595 * @param fds fd set
\r
596 * @param desc socket to add
\r
599 GNUNET_NETWORK_fdset_set (struct GNUNET_NETWORK_FDSet *fds,
600 \rconst struct GNUNET_NETWORK_Handle *desc)
\r
602 \rFD_SET (desc->fd, &fds->sds);
603 \r\rif (desc->fd + 1 > fds->nsds)
604 \rfds->nsds = desc->fd + 1;
609 * Check whether a socket is part of the fd set
\r
610 * @param fds fd set
\r
611 * @param desc socket
\r
612 * @return 0 if the FD is not set
\r
615 GNUNET_NETWORK_fdset_isset (const struct GNUNET_NETWORK_FDSet *fds,
616 \rconst struct GNUNET_NETWORK_Handle *desc)
\r
618 \rreturn FD_ISSET (desc->fd, &fds->sds);
623 * Add one fd set to another
\r
624 * @param dst the fd set to add to
\r
625 * @param src the fd set to add from
\r
628 GNUNET_NETWORK_fdset_add (struct GNUNET_NETWORK_FDSet *dst,
629 \rconst struct GNUNET_NETWORK_FDSet *src)
\r
632 \r\rfor (nfds = src->nsds; nfds > 0; nfds--)
633 \rif (FD_ISSET (nfds, &src->sds))
636 \rFD_SET (nfds, &dst->sds);
637 \rif (nfds + 1 > dst->nsds)
638 \rdst->nsds = nfds + 1;
644 * Copy one fd set to another
\r
645 * @param to destination
\r
646 * @param from source
\r
649 GNUNET_NETWORK_fdset_copy (struct GNUNET_NETWORK_FDSet *to,
650 \rconst struct GNUNET_NETWORK_FDSet *from)
\r
652 \rFD_COPY (&from->sds, &to->sds);
653 \rto->nsds = from->nsds;
656 struct GNUNET_CONTAINER_SList_Iterator *iter;
657 \r\r\rGNUNET_CONTAINER_slist_clear (to->handles);
658 \r\rfor (iter = GNUNET_CONTAINER_slist_begin (from->handles);
659 \rGNUNET_CONTAINER_slist_end (iter) != GNUNET_YES;
660 GNUNET_CONTAINER_slist_next (iter))
665 \r\rhandle = GNUNET_CONTAINER_slist_get (iter, &len);
666 \rGNUNET_CONTAINER_slist_add (to->handles,
667 GNUNET_CONTAINER_SLIST_DISPOSITION_TRANSIENT,
674 * Copy a native fd set
\r
675 * @param to destination
\r
676 * @param from native source set
\r
677 * @param nfds the biggest socket number in from + 1
\r
680 GNUNET_NETWORK_fdset_copy_native (struct GNUNET_NETWORK_FDSet *to,
681 \rconst fd_set * from, int nfds)
\r
683 \rFD_COPY (from, &to->sds);
688 * Add a file handle to the fd set
\r
689 * @param fds fd set
\r
690 * @param h the file handle to add
\r
693 GNUNET_NETWORK_fdset_handle_set (struct GNUNET_NETWORK_FDSet *fds,
694 \rconst struct GNUNET_DISK_FileHandle *h)
\r
699 \r\rGNUNET_DISK_internal_file_handle_ (h, &hw, sizeof (HANDLE));
700 \rGNUNET_CONTAINER_slist_add (fds->handles, GNUNET_NO, &hw, sizeof (HANDLE));
704 \r\rGNUNET_DISK_internal_file_handle_ (h, &fd, sizeof (int));
705 \rFD_SET (fd, &fds->sds);
706 \rif (fd + 1 > fds->nsds)
707 \rfds->nsds = fd + 1;
714 * Check if a file handle is part of an fd set
\r
715 * @param fds fd set
\r
716 * @param h file handle
\r
717 * @return GNUNET_YES if the file handle is part of the set
\r
720 GNUNET_NETWORK_fdset_handle_isset (const struct GNUNET_NETWORK_FDSet *fds,
721 \rconst struct GNUNET_DISK_FileHandle *h)
\r
725 return GNUNET_CONTAINER_slist_contains (fds->handles, h->h,
729 return FD_ISSET (h->fd, &fds->sds);
736 * Checks if two fd sets overlap
\r
737 * @param fds1 first fd set
\r
738 * @param fds2 second fd set
\r
739 * @return GNUNET_YES if they do overlap, GNUNET_NO otherwise
\r
742 GNUNET_NETWORK_fdset_overlap (const struct GNUNET_NETWORK_FDSet *fds1,
743 \rconst struct GNUNET_NETWORK_FDSet *fds2)
\r
746 \r\rnfds = fds1->nsds;
747 \rif (nfds < fds2->nsds)
749 \r\rfor (; nfds >= 0; nfds--)
750 \rif (FD_ISSET (nfds, &fds1->sds) && FD_ISSET (nfds, &fds2->sds))
752 \r\rreturn GNUNET_NO;
757 * Creates an fd set
\r
758 * @return a new fd set
\r
760 struct GNUNET_NETWORK_FDSet *
\r
761 GNUNET_NETWORK_fdset_create ()
\r
763 \rstruct GNUNET_NETWORK_FDSet *fds;
764 \r\rfds = GNUNET_malloc (sizeof (struct GNUNET_NETWORK_FDSet));
767 fds->handles = GNUNET_CONTAINER_slist_create ();
770 GNUNET_NETWORK_fdset_zero (fds);
776 * Releases the associated memory of an fd set
\r
777 * @param fds fd set
\r
780 GNUNET_NETWORK_fdset_destroy (struct GNUNET_NETWORK_FDSet *fds)
\r
784 GNUNET_CONTAINER_slist_destroy (fds->handles);
791 * Check if sockets meet certain conditions
\r
792 * @param rfds set of sockets to be checked for readability
\r
793 * @param wfds set of sockets to be checked for writability
\r
794 * @param efds set of sockets to be checked for exceptions
\r
795 * @param timeout relative value when to return
\r
796 * @return number of selected sockets, GNUNET_SYSERR on error
\r
799 GNUNET_NETWORK_socket_select (struct GNUNET_NETWORK_FDSet *rfds,
800 \rstruct GNUNET_NETWORK_FDSet *wfds,
801 \rstruct GNUNET_NETWORK_FDSet *efds,
802 \rconst struct GNUNET_TIME_Relative timeout)
\r
809 \rnfds = GNUNET_MAX (nfds, wfds->nsds);
811 \rnfds = GNUNET_MAX (nfds, efds->nsds);
815 \r\rtv.tv_sec = timeout.value / GNUNET_TIME_UNIT_SECONDS.value;
817 1000 * (timeout.value - (tv.tv_sec * GNUNET_TIME_UNIT_SECONDS.value));
818 \rif ((nfds == 0) &&
\r(timeout.value == GNUNET_TIME_UNIT_FOREVER_REL.value))
821 \rGNUNET_log (GNUNET_ERROR_TYPE_ERROR,
823 ("Fatal internal logic error, process hangs in `%s' (abort with CTRL-C)!\n"),
827 \rreturn select (nfds + 1,
\r
828 (rfds != NULL) ? &rfds->sds : NULL,
\r
829 (wfds != NULL) ? &wfds->sds : NULL,
\r
830 (efds != NULL) ? &efds->sds : NULL,
\r
831 (timeout.value == GNUNET_TIME_UNIT_FOREVER_REL.value)
\r
836 \rfd_set sock_read, sock_write, sock_except;
837 \rfd_set aread, awrite, aexcept;
839 \rstruct timeval tvslice;
843 #define SAFE_FD_ISSET(fd, set) (set != NULL && FD_ISSET(fd, set))
\r
845 /* calculate how long we need to wait in milliseconds */
\r
846 if (timeout.value == GNUNET_TIME_UNIT_FOREVER_REL.value)
847 \rms_total = INFINITE;
850 \rms_total = timeout.value / GNUNET_TIME_UNIT_MILLISECONDS.value;
852 /* select() may be used as a portable way to sleep */
\r
853 if (!(rfds || wfds || efds))
860 \rsock_read = rfds->sds;
863 \rFD_ZERO (&sock_read);
865 \rsock_write = wfds->sds;
868 \rFD_ZERO (&sock_write);
870 \rsock_except = efds->sds;
873 \rFD_ZERO (&sock_except);
875 /* multiplex between winsock select() and waiting on the handles */
\r
878 \rFD_ZERO (&aexcept);
879 \r\rlimit = GetTickCount () + ms_total;
889 /* overwrite the zero'd sets here; the select call
\r
890 * will clear those that are not active */
\r
891 \rFD_COPY (&sock_read, &aread);
892 \rFD_COPY (&sock_write, &awrite);
893 \rFD_COPY (&sock_except, &aexcept);
894 \r\rtvslice.tv_sec = 0;
895 \rtvslice.tv_usec = 100000;
897 \rselect (nfds + 1, &aread, &awrite, &aexcept,
898 \r&tvslice)) == SOCKET_ERROR)
901 \rSetErrnoFromWinsockError (WSAGetLastError ());
902 \rif (errno == ENOTSOCK)
906 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "select");
909 \rgoto select_loop_end;
913 /* Poll read pipes */
\r
917 \rstruct GNUNET_CONTAINER_SList_Iterator *i;
919 \r\ron_next = GNUNET_NO;
920 \rfor (i = GNUNET_CONTAINER_slist_begin (rfds->handles);
921 \rGNUNET_CONTAINER_slist_end (i) != GNUNET_YES;
922 \ron_next || GNUNET_CONTAINER_slist_next (i))
927 \r\rh = *(HANDLE *) GNUNET_CONTAINER_slist_get (i, NULL);
928 \ron_next = GNUNET_NO;
929 \r\rif (!PeekNamedPipe (h, NULL, 0, NULL, &dwBytes, NULL))
932 \rGNUNET_CONTAINER_slist_erase (i);
933 \ron_next = GNUNET_YES;
935 \rSetErrnoFromWinError (GetLastError ());
938 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
942 goto select_loop_end;
954 \rGNUNET_CONTAINER_slist_erase (i);
955 \ron_next = GNUNET_YES;
960 /* Poll for faulty pipes */
\r
964 \rstruct GNUNET_CONTAINER_SList_Iterator *i;
966 \r\ron_next = GNUNET_NO;
967 \rfor (i = GNUNET_CONTAINER_slist_begin (efds->handles);
968 \rGNUNET_CONTAINER_slist_end (i) != GNUNET_YES;
969 \ron_next || GNUNET_CONTAINER_slist_next (i))
974 \r\rh = *(HANDLE *) GNUNET_CONTAINER_slist_get (i, NULL);
975 \r\rif (PeekNamedPipe (h, NULL, 0, NULL, &dwBytes, NULL))
978 \rGNUNET_CONTAINER_slist_erase (i);
979 \ron_next = GNUNET_YES;
984 \ron_next = GNUNET_NO;
990 \rGNUNET_assert (GNUNET_CONTAINER_slist_count (wfds->handles) == 0);
992 /* Check for closed sockets */
\r
993 for (i = 0; i < nfds; i++)
996 \rif (SAFE_FD_ISSET (i, &sock_read))
999 \rstruct sockaddr addr;
1001 \r\rif (getpeername (i, &addr, &len) == SOCKET_ERROR)
1005 \r\rlen = sizeof (err);
1007 (i, SOL_SOCKET, SO_ERROR, (char *) &err, &len) == 0
\r
1008 &&err == WSAENOTCONN)
1011 \rif (!SAFE_FD_ISSET (i, &aread))
1014 \rFD_SET (i, &aread);
1021 \r\rselect_loop_end:;
1023 \rwhile (retcode == 0 && (ms_total == INFINITE || GetTickCount () < limit));
1024 \r\rif (retcode != -1)
1030 \rGNUNET_NETWORK_fdset_zero (rfds);
1031 \rGNUNET_NETWORK_fdset_copy_native (rfds, &aread, retcode);
1036 \rGNUNET_NETWORK_fdset_zero (wfds);
1037 \rGNUNET_NETWORK_fdset_copy_native (wfds, &awrite, retcode);
1042 \rGNUNET_NETWORK_fdset_zero (efds);
1043 \rGNUNET_NETWORK_fdset_copy_native (efds, &aexcept, retcode);
1052 /* end of network.c */
\r