2 This file is part of GNUnet.
3 Copyright (C) 2009-2013 GNUnet e.V.
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.
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.
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/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
22 * @file util/network.c
23 * @brief basic, low-level networking interface
25 * @author Christian Grothoff
28 #include "gnunet_util_lib.h"
31 #define LOG(kind,...) GNUNET_log_from (kind, "util-network", __VA_ARGS__)
32 #define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util-network", syscall, filename)
33 #define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util-network", syscall)
35 #define DEBUG_NETWORK GNUNET_EXTRA_LOGGING
38 #ifndef INVALID_SOCKET
39 #define INVALID_SOCKET -1
44 * @brief handle to a socket
46 struct GNUNET_NETWORK_Handle
55 * Address family / domain.
65 * Number of bytes in addr.
70 * Address we were bound to, or NULL.
72 struct sockaddr *addr;
78 * Test if the given protocol family is supported by this system.
80 * @param pf protocol family to test (PF_INET, PF_INET6, PF_UNIX)
81 * @return #GNUNET_OK if the PF is supported
84 GNUNET_NETWORK_test_pf (int pf)
88 s = socket (pf, SOCK_STREAM, 0);
91 if (EAFNOSUPPORT == errno)
93 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
94 "Failed to create test socket: %s\n",
108 * Given a unixpath that is too long (larger than UNIX_PATH_MAX),
109 * shorten it to an acceptable length while keeping it unique
110 * and making sure it remains a valid filename (if possible).
112 * @param unixpath long path, will be freed (or same pointer returned
113 * with moved 0-termination).
114 * @return shortened unixpath, NULL on error
117 GNUNET_NETWORK_shorten_unixpath (char *unixpath)
119 struct sockaddr_un dummy;
122 struct GNUNET_HashCode sh;
123 struct GNUNET_CRYPTO_HashAsciiEncoded ae;
126 upm = sizeof (dummy.sun_path);
127 slen = strlen (unixpath);
129 return unixpath; /* no shortening required */
130 GNUNET_CRYPTO_hash (unixpath, slen, &sh);
131 while (16 + strlen (unixpath) >= upm)
133 if (NULL == (end = strrchr (unixpath, '/')))
135 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
136 _("Unable to shorten unix path `%s' while keeping name unique\n"),
138 GNUNET_free (unixpath);
143 GNUNET_CRYPTO_hash_to_enc (&sh, &ae);
144 strncat (unixpath, (char *) ae.encoding, 16);
151 * If services crash, they can leave a unix domain socket file on the
152 * disk. This needs to be manually removed, because otherwise both
153 * bind() and connect() for the respective address will fail. In this
154 * function, we test if such a left-over file exists, and if so,
155 * remove it (unless there is a listening service at the address).
157 * @param un unix domain socket address to check
160 GNUNET_NETWORK_unix_precheck (const struct sockaddr_un *un)
167 s = socket (AF_UNIX, SOCK_STREAM, 0);
170 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
171 "Failed to open AF_UNIX socket");
175 (struct sockaddr *) un,
176 sizeof (struct sockaddr_un));
178 GNUNET_break (0 == close (s));
180 return; /* another process is listening, do not remove! */
181 if (ECONNREFUSED != eno)
182 return; /* some other error, likely "no such file or directory" -- all well */
183 /* should unlink, but sanity checks first */
184 if (0 != stat (un->sun_path,
186 return; /* failed to 'stat', likely does not exist after all */
187 if (S_IFSOCK != (S_IFMT & sbuf.st_mode))
188 return; /* refuse to unlink anything except sockets */
189 /* finally, really unlink */
190 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
191 "Removing left-over `%s' from previous exeuction\n",
193 if (0 != unlink (un->sun_path))
194 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
203 #define FD_COPY(s, d) do { GNUNET_memcpy ((d), (s), sizeof (fd_set)); } while (0)
208 * Set if a socket should use blocking or non-blocking IO.
211 * @param doBlock blocking mode
212 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
215 GNUNET_NETWORK_socket_set_blocking (struct GNUNET_NETWORK_Handle *fd,
229 SetErrnoFromWinsockError (WSAGetLastError ());
230 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
232 return GNUNET_SYSERR;
238 int flags = fcntl (fd->fd, F_GETFL);
242 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
244 return GNUNET_SYSERR;
247 flags &= ~O_NONBLOCK;
251 if (0 != fcntl (fd->fd,
256 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
258 return GNUNET_SYSERR;
266 * Make a socket non-inheritable to child processes
268 * @param h the socket to make non-inheritable
269 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
270 * @warning Not implemented on Windows
273 socket_set_inheritable (const struct GNUNET_NETWORK_Handle *h)
277 i = fcntl (h->fd, F_GETFD);
279 return GNUNET_SYSERR;
280 if (i == (i | FD_CLOEXEC))
283 if (fcntl (h->fd, F_SETFD, i) < 0)
284 return GNUNET_SYSERR;
288 b = SetHandleInformation ((HANDLE) h->fd, HANDLE_FLAG_INHERIT, 0);
291 SetErrnoFromWinsockError (WSAGetLastError ());
292 return GNUNET_SYSERR;
301 * The MSG_NOSIGNAL equivalent on Mac OS X
303 * @param h the socket to make non-delaying
306 socket_set_nosigpipe (const struct GNUNET_NETWORK_Handle *h)
311 setsockopt (h->fd, SOL_SOCKET, SO_NOSIGPIPE,
312 (const void *) &abs_value,
314 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "setsockopt");
320 * Disable delays when sending data via the socket.
321 * (GNUnet makes sure that messages are as big as
324 * @param h the socket to make non-delaying
327 socket_set_nodelay (const struct GNUNET_NETWORK_Handle *h)
336 &value, sizeof (value)))
337 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
340 const char *abs_value = "1";
346 (const void *) abs_value,
348 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
355 * Perform proper canonical initialization for a network handle.
356 * Set it to non-blocking, make it non-inheritable to child
357 * processes, disable SIGPIPE, enable "nodelay" (if non-UNIX
358 * stream socket) and check that it is smaller than FD_SETSIZE.
360 * @param h socket to initialize
361 * @param af address family of the socket
362 * @param type socket type
363 * @return #GNUNET_OK on success, #GNUNET_SYSERR if initialization
364 * failed and the handle was destroyed
367 initialize_network_handle (struct GNUNET_NETWORK_Handle *h,
375 if (h->fd == INVALID_SOCKET)
378 SetErrnoFromWinsockError (WSAGetLastError ());
383 return GNUNET_SYSERR;
386 if (h->fd >= FD_SETSIZE)
388 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (h));
390 return GNUNET_SYSERR;
393 if (GNUNET_OK != socket_set_inheritable (h))
394 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
395 "socket_set_inheritable");
397 if (GNUNET_SYSERR == GNUNET_NETWORK_socket_set_blocking (h, GNUNET_NO))
401 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (h));
403 return GNUNET_SYSERR;
406 socket_set_nosigpipe (h);
408 if ( (type == SOCK_STREAM)
413 socket_set_nodelay (h);
419 * accept a new connection on a socket
421 * @param desc bound socket
422 * @param address address of the connecting peer, may be NULL
423 * @param address_len length of @a address
424 * @return client socket
426 struct GNUNET_NETWORK_Handle *
427 GNUNET_NETWORK_socket_accept (const struct GNUNET_NETWORK_Handle *desc,
428 struct sockaddr *address,
429 socklen_t *address_len)
431 struct GNUNET_NETWORK_Handle *ret;
434 ret = GNUNET_new (struct GNUNET_NETWORK_Handle);
437 struct sockaddr_storage name;
438 socklen_t namelen = sizeof (name);
440 int gsn = getsockname (desc->fd,
441 (struct sockaddr *) &name,
445 LOG (GNUNET_ERROR_TYPE_DEBUG,
446 "Accepting connection on `%s'\n",
447 GNUNET_a2s ((const struct sockaddr *) &name,
451 ret->fd = accept (desc->fd,
462 initialize_network_handle (ret,
463 (NULL != address) ? address->sa_family : desc->af,
473 * Bind a socket to a particular address.
475 * @param desc socket to bind
476 * @param address address to be bound
477 * @param address_len length of @a address
478 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
481 GNUNET_NETWORK_socket_bind (struct GNUNET_NETWORK_Handle *desc,
482 const struct sockaddr *address,
483 socklen_t address_len)
492 if (AF_INET6 == desc->af)
493 if (setsockopt (desc->fd,
498 LOG_STRERROR (GNUNET_ERROR_TYPE_DEBUG,
504 if (AF_UNIX == address->sa_family)
505 GNUNET_NETWORK_unix_precheck ((const struct sockaddr_un *) address);
509 /* This is required here for TCP sockets, but only on UNIX */
510 if ( (SOCK_STREAM == desc->type) &&
511 (0 != setsockopt (desc->fd,
515 LOG_STRERROR (GNUNET_ERROR_TYPE_DEBUG,
519 /* set permissions of newly created non-abstract UNIX domain socket to
520 "user-only"; applications can choose to relax this later */
521 mode_t old_mask = 0; /* assigned to make compiler happy */
522 const struct sockaddr_un *un = (const struct sockaddr_un *) address;
523 int not_abstract = 0;
525 if ((AF_UNIX == address->sa_family)
526 && ('\0' != un->sun_path[0]) ) /* Not an abstract socket */
529 old_mask = umask (S_IWGRP | S_IRGRP | S_IXGRP | S_IWOTH | S_IROTH | S_IXOTH);
532 ret = bind (desc->fd,
538 (void) umask (old_mask);
542 if (SOCKET_ERROR == ret)
543 SetErrnoFromWinsockError (WSAGetLastError ());
546 return GNUNET_SYSERR;
548 desc->addr = GNUNET_malloc (address_len);
549 GNUNET_memcpy (desc->addr, address, address_len);
550 desc->addrlen = address_len;
560 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
563 GNUNET_NETWORK_socket_close (struct GNUNET_NETWORK_Handle *desc)
571 ret = closesocket (desc->fd);
572 error = WSAGetLastError ();
573 SetErrnoFromWinsockError (error);
574 LOG (GNUNET_ERROR_TYPE_DEBUG,
575 "Closed 0x%x, closesocket() returned %d, GLE is %u\n",
580 ret = close (desc->fd);
583 const struct sockaddr_un *un = (const struct sockaddr_un *) desc->addr;
585 /* Cleanup the UNIX domain socket and its parent directories in case of non
587 if ( (AF_UNIX == desc->af) &&
588 (NULL != desc->addr) &&
589 ('\0' != un->sun_path[0]) )
591 char *dirname = GNUNET_strndup (un->sun_path,
592 sizeof (un->sun_path));
594 if (0 != unlink (dirname))
596 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING,
604 len = strlen (dirname);
605 while ((len > 0) && (dirname[len] != DIR_SEPARATOR))
608 if ((0 != len) && (0 != rmdir (dirname)))
615 /* these are normal and can just be ignored */
618 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
625 GNUNET_free (dirname);
628 GNUNET_NETWORK_socket_free_memory_only_ (desc);
629 return (ret == 0) ? GNUNET_OK : GNUNET_SYSERR;
634 * Only free memory of a socket, keep the file descriptor untouched.
639 GNUNET_NETWORK_socket_free_memory_only_ (struct GNUNET_NETWORK_Handle *desc)
641 GNUNET_free_non_null (desc->addr);
647 * Box a native socket (and check that it is a socket).
649 * @param fd socket to box
650 * @return NULL on error (including not supported on target platform)
652 struct GNUNET_NETWORK_Handle *
653 GNUNET_NETWORK_socket_box_native (SOCKTYPE fd)
655 struct GNUNET_NETWORK_Handle *ret;
659 /* FIXME: Find a better call to check that FD is valid */
661 WSAIoctl (fd, FIONBIO,
662 (void *) &i, sizeof (i),
665 return NULL; /* invalid FD */
666 ret = GNUNET_new (struct GNUNET_NETWORK_Handle);
671 if (fcntl (fd, F_GETFD) < 0)
672 return NULL; /* invalid FD */
673 ret = GNUNET_new (struct GNUNET_NETWORK_Handle);
682 * Connect a socket to some remote address.
685 * @param address peer address
686 * @param address_len length of @a address
687 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
690 GNUNET_NETWORK_socket_connect (const struct GNUNET_NETWORK_Handle *desc,
691 const struct sockaddr *address,
692 socklen_t address_len)
696 ret = connect (desc->fd,
700 if (SOCKET_ERROR == ret)
702 SetErrnoFromWinsockError (WSAGetLastError ());
703 if (errno == EWOULDBLOCK)
707 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
715 * @param level protocol level of the option
716 * @param optname identifier of the option
717 * @param optval options
718 * @param optlen length of @a optval
719 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
722 GNUNET_NETWORK_socket_getsockopt (const struct GNUNET_NETWORK_Handle *desc,
730 ret = getsockopt (desc->fd,
737 (SOL_SOCKET == level) &&
738 (SO_ERROR == optname) )
739 *((int *) optval) = GetErrnoFromWinsockError (*((int *) optval));
740 else if (SOCKET_ERROR == ret)
741 SetErrnoFromWinsockError (WSAGetLastError ());
743 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
751 * @param backlog length of the listen queue
752 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
755 GNUNET_NETWORK_socket_listen (const struct GNUNET_NETWORK_Handle *desc,
760 ret = listen (desc->fd,
763 if (SOCKET_ERROR == ret)
764 SetErrnoFromWinsockError (WSAGetLastError ());
766 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
771 * How much data is available to be read on this descriptor?
774 * @returns #GNUNET_SYSERR if no data is available, or on error!
777 GNUNET_NETWORK_socket_recvfrom_amount (const struct GNUNET_NETWORK_Handle *desc)
781 /* How much is there to be read? */
785 error = ioctl (desc->fd,
789 return (ssize_t) pending;
790 return GNUNET_SYSERR;
794 error = ioctlsocket (desc->fd,
797 if (error != SOCKET_ERROR)
798 return (ssize_t) pending;
799 return GNUNET_SYSERR;
805 * Read data from a socket (always non-blocking).
808 * @param buffer buffer
809 * @param length length of @a buffer
810 * @param src_addr either the source to recv from, or all zeroes
811 * to be filled in by recvfrom
812 * @param addrlen length of the @a src_addr
815 GNUNET_NETWORK_socket_recvfrom (const struct GNUNET_NETWORK_Handle *desc,
818 struct sockaddr *src_addr,
827 flags |= MSG_DONTWAIT;
830 ret = recvfrom (desc->fd,
837 if (SOCKET_ERROR == ret)
838 SetErrnoFromWinsockError (WSAGetLastError ());
845 * Read data from a connected socket (always non-blocking).
848 * @param buffer buffer
849 * @param length length of @a buffer
850 * @return number of bytes received, -1 on error
853 GNUNET_NETWORK_socket_recv (const struct GNUNET_NETWORK_Handle *desc,
863 flags |= MSG_DONTWAIT;
865 ret = recv (desc->fd,
870 if (SOCKET_ERROR == ret)
871 SetErrnoFromWinsockError (WSAGetLastError ());
878 * Send data (always non-blocking).
881 * @param buffer data to send
882 * @param length size of the @a buffer
883 * @return number of bytes sent, #GNUNET_SYSERR on error
886 GNUNET_NETWORK_socket_send (const struct GNUNET_NETWORK_Handle *desc,
895 flags |= MSG_DONTWAIT;
899 flags |= MSG_NOSIGNAL;
902 ret = send (desc->fd,
907 if (SOCKET_ERROR == ret)
908 SetErrnoFromWinsockError (WSAGetLastError ());
916 * Send data to a particular destination (always non-blocking).
917 * This function only works for UDP sockets.
920 * @param message data to send
921 * @param length size of the @a message
922 * @param dest_addr destination address
923 * @param dest_len length of @a address
924 * @return number of bytes sent, #GNUNET_SYSERR on error
927 GNUNET_NETWORK_socket_sendto (const struct GNUNET_NETWORK_Handle *desc,
930 const struct sockaddr *dest_addr,
939 flags |= MSG_DONTWAIT;
942 flags |= MSG_NOSIGNAL;
944 ret = sendto (desc->fd, message, length, flags, dest_addr, dest_len);
946 if (SOCKET_ERROR == ret)
947 SetErrnoFromWinsockError (WSAGetLastError ());
957 * @param level protocol level of the option
958 * @param option_name option identifier
959 * @param option_value value to set
960 * @param option_len size of @a option_value
961 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
964 GNUNET_NETWORK_socket_setsockopt (struct GNUNET_NETWORK_Handle *fd,
967 const void *option_value,
968 socklen_t option_len)
972 ret = setsockopt (fd->fd,
978 if (SOCKET_ERROR == ret)
979 SetErrnoFromWinsockError (WSAGetLastError ());
981 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
986 * Create a new socket. Configure it for non-blocking IO and
987 * mark it as non-inheritable to child processes (set the
988 * close-on-exec flag).
990 * @param domain domain of the socket
991 * @param type socket type
992 * @param protocol network protocol
993 * @return new socket, NULL on error
995 struct GNUNET_NETWORK_Handle *
996 GNUNET_NETWORK_socket_create (int domain,
1000 struct GNUNET_NETWORK_Handle *ret;
1003 fd = socket (domain, type, protocol);
1006 ret = GNUNET_new (struct GNUNET_NETWORK_Handle);
1009 initialize_network_handle (ret,
1018 * Shut down socket operations
1019 * @param desc socket
1020 * @param how type of shutdown
1021 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
1024 GNUNET_NETWORK_socket_shutdown (struct GNUNET_NETWORK_Handle *desc,
1029 ret = shutdown (desc->fd, how);
1032 SetErrnoFromWinsockError (WSAGetLastError ());
1034 return (0 == ret) ? GNUNET_OK : GNUNET_SYSERR;
1039 * Disable the "CORK" feature for communication with the given socket,
1040 * forcing the OS to immediately flush the buffer on transmission
1041 * instead of potentially buffering multiple messages. Essentially
1042 * reduces the OS send buffers to zero.
1044 * @param desc socket
1045 * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
1048 GNUNET_NETWORK_socket_disable_corking (struct GNUNET_NETWORK_Handle *desc)
1057 setsockopt (desc->fd,
1062 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
1066 setsockopt (desc->fd,
1071 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
1078 setsockopt (desc->fd,
1083 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
1087 setsockopt (desc->fd,
1092 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
1095 return ret == 0 ? GNUNET_OK : GNUNET_SYSERR;
1105 GNUNET_NETWORK_fdset_zero (struct GNUNET_NETWORK_FDSet *fds)
1107 FD_ZERO (&fds->sds);
1110 fds->handles_pos = 0;
1116 * Add a socket to the FD set
1119 * @param desc socket to add
1122 GNUNET_NETWORK_fdset_set (struct GNUNET_NETWORK_FDSet *fds,
1123 const struct GNUNET_NETWORK_Handle *desc)
1127 fds->nsds = GNUNET_MAX (fds->nsds,
1133 * Check whether a socket is part of the fd set
1136 * @param desc socket
1137 * @return 0 if the FD is not set
1140 GNUNET_NETWORK_fdset_isset (const struct GNUNET_NETWORK_FDSet *fds,
1141 const struct GNUNET_NETWORK_Handle *desc)
1143 return FD_ISSET (desc->fd,
1149 * Add one fd set to another
1151 * @param dst the fd set to add to
1152 * @param src the fd set to add from
1155 GNUNET_NETWORK_fdset_add (struct GNUNET_NETWORK_FDSet *dst,
1156 const struct GNUNET_NETWORK_FDSet *src)
1161 for (nfds = src->nsds; nfds >= 0; nfds--)
1162 if (FD_ISSET (nfds, &src->sds))
1163 FD_SET (nfds, &dst->sds);
1164 dst->nsds = GNUNET_MAX (dst->nsds,
1167 /* This is MinGW32-specific implementation that relies on the code that
1168 * winsock2.h defines for FD_SET. Namely, it relies on FD_SET checking
1169 * that fd being added is not already in the set.
1170 * Also relies on us knowing what's inside fd_set (fd_count and fd_array).
1172 * NOTE: I don't understand why the UNIX-logic wouldn't work
1173 * for the first part here as well. -CG
1177 for (i = 0; i < src->sds.fd_count; i++)
1178 FD_SET (src->sds.fd_array[i],
1180 dst->nsds = GNUNET_MAX (src->nsds,
1183 /* also copy over `struct GNUNET_DISK_FileHandle` array */
1184 if (dst->handles_pos + src->handles_pos > dst->handles_size)
1185 GNUNET_array_grow (dst->handles,
1187 ((dst->handles_pos + src->handles_pos) << 1));
1188 for (i = 0; i < src->handles_pos; i++)
1189 dst->handles[dst->handles_pos++] = src->handles[i];
1195 * Copy one fd set to another
1197 * @param to destination
1198 * @param from source
1201 GNUNET_NETWORK_fdset_copy (struct GNUNET_NETWORK_FDSet *to,
1202 const struct GNUNET_NETWORK_FDSet *from)
1204 FD_COPY (&from->sds,
1206 to->nsds = from->nsds;
1208 if (from->handles_pos > to->handles_size)
1209 GNUNET_array_grow (to->handles,
1211 from->handles_pos * 2);
1212 GNUNET_memcpy (to->handles,
1214 from->handles_pos * sizeof (struct GNUNET_NETWORK_Handle *));
1215 to->handles_pos = from->handles_pos;
1221 * Return file descriptor for this network handle
1223 * @param desc wrapper to process
1224 * @return POSIX file descriptor
1227 GNUNET_NETWORK_get_fd (const struct GNUNET_NETWORK_Handle *desc)
1234 * Return sockaddr for this network handle
1236 * @param desc wrapper to process
1240 GNUNET_NETWORK_get_addr (const struct GNUNET_NETWORK_Handle *desc)
1247 * Return sockaddr length for this network handle
1249 * @param desc wrapper to process
1250 * @return socklen_t for sockaddr
1253 GNUNET_NETWORK_get_addrlen (const struct GNUNET_NETWORK_Handle *desc)
1255 return desc->addrlen;
1260 * Copy a native fd set
1262 * @param to destination
1263 * @param from native source set
1264 * @param nfds the biggest socket number in from + 1
1267 GNUNET_NETWORK_fdset_copy_native (struct GNUNET_NETWORK_FDSet *to,
1278 * Set a native fd in a set
1280 * @param to destination
1281 * @param nfd native FD to set
1284 GNUNET_NETWORK_fdset_set_native (struct GNUNET_NETWORK_FDSet *to,
1287 GNUNET_assert ((nfd >= 0) && (nfd < FD_SETSIZE));
1288 FD_SET (nfd, &to->sds);
1289 to->nsds = GNUNET_MAX (nfd + 1,
1295 * Test native fd in a set
1297 * @param to set to test, NULL for empty set
1298 * @param nfd native FD to test, or -1 for none
1299 * @return #GNUNET_YES if FD is set in the set
1302 GNUNET_NETWORK_fdset_test_native (const struct GNUNET_NETWORK_FDSet *to,
1308 return FD_ISSET (nfd, &to->sds) ? GNUNET_YES : GNUNET_NO;
1313 * Add a file handle to the fd set
1315 * @param h the file handle to add
1318 GNUNET_NETWORK_fdset_handle_set (struct GNUNET_NETWORK_FDSet *fds,
1319 const struct GNUNET_DISK_FileHandle *h)
1322 if (fds->handles_pos == fds->handles_size)
1323 GNUNET_array_grow (fds->handles,
1325 fds->handles_size * 2 + 2);
1326 fds->handles[fds->handles_pos++] = h;
1330 GNUNET_assert (GNUNET_OK ==
1331 GNUNET_DISK_internal_file_handle_ (h,
1336 fds->nsds = GNUNET_MAX (fd + 1,
1343 * Add a file handle to the fd set
1345 * @param h the file handle to add
1348 GNUNET_NETWORK_fdset_handle_set_first (struct GNUNET_NETWORK_FDSet *fds,
1349 const struct GNUNET_DISK_FileHandle *h)
1352 if (fds->handles_pos == fds->handles_size)
1353 GNUNET_array_grow (fds->handles,
1355 fds->handles_size * 2 + 2);
1356 fds->handles[fds->handles_pos] = h;
1357 if (fds->handles[0] != h)
1359 const struct GNUNET_DISK_FileHandle *bak = fds->handles[0];
1360 fds->handles[0] = h;
1361 fds->handles[fds->handles_pos] = bak;
1365 GNUNET_NETWORK_fdset_handle_set (fds, h);
1371 * Check if a file handle is part of an fd set
1374 * @param h file handle
1375 * @return #GNUNET_YES if the file handle is part of the set
1378 GNUNET_NETWORK_fdset_handle_isset (const struct GNUNET_NETWORK_FDSet *fds,
1379 const struct GNUNET_DISK_FileHandle *h)
1384 for (i=0;i<fds->handles_pos;i++)
1385 if (fds->handles[i] == h)
1389 return FD_ISSET (h->fd,
1397 * Numerically compare pointers to sort them.
1398 * Used to test for overlap in the arrays.
1400 * @param p1 a pointer
1401 * @param p2 a pointer
1402 * @return -1, 0 or 1, if the p1 < p2, p1==p2 or p1 > p2.
1405 ptr_cmp (const void *p1,
1410 if ((intptr_t) p1 < (intptr_t) p2)
1418 * Checks if two fd sets overlap
1420 * @param fds1 first fd set
1421 * @param fds2 second fd set
1422 * @return #GNUNET_YES if they do overlap, #GNUNET_NO otherwise
1425 GNUNET_NETWORK_fdset_overlap (const struct GNUNET_NETWORK_FDSet *fds1,
1426 const struct GNUNET_NETWORK_FDSet *fds2)
1431 nfds = GNUNET_MIN (fds1->nsds,
1436 if ( (FD_ISSET (nfds,
1447 /* This code is somewhat hacky, we are not supposed to know what's
1448 * inside of fd_set; also the O(n^2) is really bad... */
1449 for (i = 0; i < fds1->sds.fd_count; i++)
1450 for (j = 0; j < fds2->sds.fd_count; j++)
1451 if (fds1->sds.fd_array[i] == fds2->sds.fd_array[j])
1454 /* take a short cut if possible */
1455 if ( (0 == fds1->handles_pos) ||
1456 (0 == fds2->handles_pos) )
1459 /* Sort file handles array to avoid quadratic complexity when
1460 checking for overlap */
1461 qsort (fds1->handles,
1465 qsort (fds2->handles,
1471 while ( (i < fds1->handles_pos) &&
1472 (j < fds2->handles_pos) )
1474 switch (ptr_cmp (fds1->handles[i],
1494 * @return a new fd set
1496 struct GNUNET_NETWORK_FDSet *
1497 GNUNET_NETWORK_fdset_create ()
1499 struct GNUNET_NETWORK_FDSet *fds;
1501 fds = GNUNET_new (struct GNUNET_NETWORK_FDSet);
1502 GNUNET_NETWORK_fdset_zero (fds);
1508 * Releases the associated memory of an fd set
1513 GNUNET_NETWORK_fdset_destroy (struct GNUNET_NETWORK_FDSet *fds)
1516 GNUNET_array_grow (fds->handles,
1528 struct _select_params
1546 * Timeout for select().
1563 SOCKET wakeup_socket;
1566 * Set to return value from select.
1576 _selector (LPVOID p)
1578 struct _select_params *sp = p;
1582 WaitForSingleObject (sp->standby,
1584 ResetEvent (sp->standby);
1585 sp->status = select (1,
1590 if (FD_ISSET (sp->wakeup_socket,
1593 FD_CLR (sp->wakeup_socket,
1597 SetEvent (sp->wakeup);
1603 static HANDLE hEventPipeWrite;
1605 static HANDLE hEventReadReady;
1607 static struct _select_params sp;
1609 static HANDLE select_thread;
1611 static HANDLE select_finished_event;
1613 static HANDLE select_standby_event;
1615 static SOCKET select_wakeup_socket = -1;
1617 static SOCKET select_send_socket = -1;
1619 static struct timeval select_timeout;
1623 * On W32, we actually use a thread to help with the
1624 * event loop due to W32-API limitations. This function
1625 * initializes that thread.
1628 initialize_select_thread ()
1630 SOCKET select_listening_socket = -1;
1631 struct sockaddr_in s_in;
1636 select_standby_event = CreateEvent (NULL, TRUE, FALSE, NULL);
1637 select_finished_event = CreateEvent (NULL, TRUE, FALSE, NULL);
1639 select_wakeup_socket = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
1641 select_listening_socket = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
1644 res = ioctlsocket (select_wakeup_socket, FIONBIO, &p);
1645 LOG (GNUNET_ERROR_TYPE_DEBUG,
1646 "Select thread initialization: ioctlsocket() returns %d\n",
1649 alen = sizeof (s_in);
1650 s_in.sin_family = AF_INET;
1652 s_in.sin_addr.S_un.S_un_b.s_b1 = 127;
1653 s_in.sin_addr.S_un.S_un_b.s_b2 = 0;
1654 s_in.sin_addr.S_un.S_un_b.s_b3 = 0;
1655 s_in.sin_addr.S_un.S_un_b.s_b4 = 1;
1656 res = bind (select_listening_socket,
1657 (const struct sockaddr *) &s_in,
1659 LOG (GNUNET_ERROR_TYPE_DEBUG,
1660 "Select thread initialization: bind() returns %d\n",
1663 res = getsockname (select_listening_socket,
1664 (struct sockaddr *) &s_in,
1666 LOG (GNUNET_ERROR_TYPE_DEBUG,
1667 "Select thread initialization: getsockname() returns %d\n",
1670 res = listen (select_listening_socket,
1672 LOG (GNUNET_ERROR_TYPE_DEBUG,
1673 "Select thread initialization: listen() returns %d\n",
1675 res = connect (select_wakeup_socket,
1676 (const struct sockaddr *) &s_in,
1678 LOG (GNUNET_ERROR_TYPE_DEBUG,
1679 "Select thread initialization: connect() returns %d\n",
1682 select_send_socket = accept (select_listening_socket,
1683 (struct sockaddr *) &s_in,
1686 closesocket (select_listening_socket);
1688 sp.wakeup = select_finished_event;
1689 sp.standby = select_standby_event;
1690 sp.wakeup_socket = select_wakeup_socket;
1692 select_thread = CreateThread (NULL,
1703 * Test if the given @a port is available.
1705 * @param ipproto transport protocol to test (i.e. IPPROTO_TCP)
1706 * @param port port number to test
1707 * @return #GNUNET_OK if the port is available, #GNUNET_NO if not
1710 GNUNET_NETWORK_test_port_free (int ipproto,
1713 struct GNUNET_NETWORK_Handle *socket;
1716 char open_port_str[6];
1717 struct addrinfo hint;
1718 struct addrinfo *ret;
1719 struct addrinfo *ai;
1721 GNUNET_snprintf (open_port_str,
1722 sizeof (open_port_str),
1724 (unsigned int) port);
1725 socktype = (IPPROTO_TCP == ipproto) ? SOCK_STREAM : SOCK_DGRAM;
1727 memset (&hint, 0, sizeof (hint));
1728 hint.ai_family = AF_UNSPEC; /* IPv4 and IPv6 */
1729 hint.ai_socktype = socktype;
1730 hint.ai_protocol = ipproto;
1731 hint.ai_addrlen = 0;
1732 hint.ai_addr = NULL;
1733 hint.ai_canonname = NULL;
1734 hint.ai_next = NULL;
1735 hint.ai_flags = AI_PASSIVE | AI_NUMERICSERV; /* Wild card address */
1736 GNUNET_assert (0 == getaddrinfo (NULL,
1740 bind_status = GNUNET_NO;
1741 for (ai = ret; NULL != ai; ai = ai->ai_next)
1743 socket = GNUNET_NETWORK_socket_create (ai->ai_family,
1748 bind_status = GNUNET_NETWORK_socket_bind (socket,
1751 GNUNET_NETWORK_socket_close (socket);
1752 if (GNUNET_OK != bind_status)
1762 * Check if sockets or pipes meet certain conditions
1764 * @param rfds set of sockets or pipes to be checked for readability
1765 * @param wfds set of sockets or pipes to be checked for writability
1766 * @param efds set of sockets or pipes to be checked for exceptions
1767 * @param timeout relative value when to return
1768 * @return number of selected sockets or pipes, #GNUNET_SYSERR on error
1771 GNUNET_NETWORK_socket_select (struct GNUNET_NETWORK_FDSet *rfds,
1772 struct GNUNET_NETWORK_FDSet *wfds,
1773 struct GNUNET_NETWORK_FDSet *efds,
1774 const struct GNUNET_TIME_Relative timeout)
1784 nfds = GNUNET_MAX (nfds,
1787 nfds = GNUNET_MAX (nfds,
1790 (timeout.rel_value_us == GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us))
1793 LOG (GNUNET_ERROR_TYPE_ERROR,
1794 _("Fatal internal logic error, process hangs in `%s' (abort with CTRL-C)!\n"),
1797 if (timeout.rel_value_us / GNUNET_TIME_UNIT_SECONDS.rel_value_us > (unsigned long long) LONG_MAX)
1799 tv.tv_sec = LONG_MAX;
1800 tv.tv_usec = 999999L;
1804 tv.tv_sec = (long) (timeout.rel_value_us / GNUNET_TIME_UNIT_SECONDS.rel_value_us);
1806 (timeout.rel_value_us -
1807 (tv.tv_sec * GNUNET_TIME_UNIT_SECONDS.rel_value_us));
1809 return select (nfds,
1810 (NULL != rfds) ? &rfds->sds : NULL,
1811 (NULL != wfds) ? &wfds->sds : NULL,
1812 (NULL != efds) ? &efds->sds : NULL,
1813 (timeout.rel_value_us ==
1814 GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us) ? NULL : &tv);
1823 * Non-blocking test if a pipe is ready for reading.
1825 * @param fh pipe handle
1826 * @return #GNUNET_YES if the pipe is ready for reading
1829 pipe_read_ready (const struct GNUNET_DISK_FileHandle *fh)
1833 DWORD waitstatus = 0;
1836 bret = PeekNamedPipe (fh->h, NULL, 0, NULL, &waitstatus, NULL);
1837 error = GetLastError ();
1840 /* TODO: either add more errors to this condition, or eliminate it
1841 * entirely (failed to peek -> pipe is in serious trouble, should
1842 * be selected as readable).
1844 if ( (error != ERROR_BROKEN_PIPE) &&
1845 (error != ERROR_INVALID_HANDLE) )
1848 else if (waitstatus <= 0)
1855 * Non-blocking test if a pipe is having an IO exception.
1857 * @param fh pipe handle
1858 * @return #GNUNET_YES if the pipe is having an IO exception.
1861 pipe_except_ready (const struct GNUNET_DISK_FileHandle *fh)
1865 if (PeekNamedPipe (fh->h, NULL, 0, NULL, &dwBytes, NULL))
1872 * Iterate over handles in fds, destructively rewrite the
1873 * handles array contents of fds so that it starts with the
1874 * handles that are ready, and update handles_pos accordingly.
1876 * @param fds set of handles (usually pipes) to be checked for readiness
1877 * @param except GNUNET_NO if fds should be checked for readiness to read,
1878 * GNUNET_YES if fds should be checked for exceptions
1879 * (there is no way to check for write-readiness - pipes are always write-ready)
1880 * @param set_for_sure a HANDLE that is known to be set already,
1881 * because WaitForMultipleObjects() returned its index.
1882 * @return number of ready handles
1885 check_handles_status (struct GNUNET_NETWORK_FDSet *fds,
1887 HANDLE set_for_sure)
1889 const struct GNUNET_DISK_FileHandle *fh;
1893 for (woff = 0, roff = 0; roff < fds->handles_pos; roff++)
1895 fh = fds->handles[roff];
1896 if (fh == set_for_sure)
1898 fds->handles[woff++] = fh;
1900 else if (fh->type == GNUNET_DISK_HANLDE_TYPE_PIPE)
1902 if ((except && pipe_except_ready (fh)) ||
1903 (!except && pipe_read_ready (fh)))
1904 fds->handles[woff++] = fh;
1906 else if (fh->type == GNUNET_DISK_HANLDE_TYPE_FILE)
1909 fds->handles[woff++] = fh;
1913 if (WAIT_OBJECT_0 == WaitForSingleObject (fh->h, 0))
1914 fds->handles[woff++] = fh;
1917 fds->handles_pos = woff;
1923 * Check if sockets or pipes meet certain conditions, version for W32.
1925 * @param rfds set of sockets or pipes to be checked for readability
1926 * @param wfds set of sockets or pipes to be checked for writability
1927 * @param efds set of sockets or pipes to be checked for exceptions
1928 * @param timeout relative value when to return
1929 * @return number of selected sockets or pipes, #GNUNET_SYSERR on error
1932 GNUNET_NETWORK_socket_select (struct GNUNET_NETWORK_FDSet *rfds,
1933 struct GNUNET_NETWORK_FDSet *wfds,
1934 struct GNUNET_NETWORK_FDSet *efds,
1935 const struct GNUNET_TIME_Relative timeout)
1937 const struct GNUNET_DISK_FileHandle *fh;
1946 HANDLE handle_array[FD_SETSIZE + 2];
1948 int returnedpos = 0;
1958 nfds = GNUNET_MAX (nfds, rfds->nsds);
1959 handles += rfds->handles_pos;
1963 nfds = GNUNET_MAX (nfds, wfds->nsds);
1964 handles += wfds->handles_pos;
1968 nfds = GNUNET_MAX (nfds, efds->nsds);
1969 handles += efds->handles_pos;
1973 (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == timeout.rel_value_us) &&
1977 LOG (GNUNET_ERROR_TYPE_ERROR,
1978 _("Fatal internal logic error, process hangs in `%s' (abort with CTRL-C)!\n"),
1981 #define SAFE_FD_ISSET(fd, set) (set != NULL && FD_ISSET(fd, set))
1982 /* calculate how long we need to wait in microseconds */
1983 if (timeout.rel_value_us == GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us)
1985 mcs_total = INFINITE;
1986 ms_rounded = INFINITE;
1990 mcs_total = timeout.rel_value_us / GNUNET_TIME_UNIT_MICROSECONDS.rel_value_us;
1991 ms_rounded = (DWORD) (mcs_total / GNUNET_TIME_UNIT_MILLISECONDS.rel_value_us);
1992 if (mcs_total > 0 && ms_rounded == 0)
1995 /* select() may be used as a portable way to sleep */
1996 if (! (rfds || wfds || efds))
2002 if (NULL == select_thread)
2003 initialize_select_thread ();
2009 FD_COPY (&rfds->sds, &aread);
2011 FD_COPY (&wfds->sds, &awrite);
2013 FD_COPY (&efds->sds, &aexcept);
2015 /* Start by doing a fast check on sockets and pipes (without
2016 waiting). It is cheap, and is sufficient most of the time. By
2017 profiling we detected that to be true in 90% of the cases.
2020 /* Do the select now */
2021 select_timeout.tv_sec = 0;
2022 select_timeout.tv_usec = 0;
2024 /* Copy all the writes to the except, so we can detect connect() errors */
2025 for (i = 0; i < awrite.fd_count; i++)
2026 FD_SET (awrite.fd_array[i],
2028 if ( (aread.fd_count > 0) ||
2029 (awrite.fd_count > 0) ||
2030 (aexcept.fd_count > 0) )
2031 selectret = select (1,
2032 (NULL != rfds) ? &aread : NULL,
2033 (NULL != wfds) ? &awrite : NULL,
2038 if (-1 == selectret)
2040 /* Throw an error early on, while we still have the context. */
2041 LOG (GNUNET_ERROR_TYPE_ERROR,
2042 "W32 select(%d, %d, %d) failed: %lu\n",
2043 rfds ? aread.fd_count : 0,
2044 wfds ? awrite.fd_count : 0,
2050 /* Check aexcept, if something is in there and we copied that
2051 FD before to detect connect() errors, add it back to the
2052 write set to report errors. */
2054 for (i = 0; i < aexcept.fd_count; i++)
2055 if (FD_ISSET (aexcept.fd_array[i],
2057 FD_SET (aexcept.fd_array[i],
2061 /* If our select returned something or is a 0-timed request, then
2062 also check the pipes and get out of here! */
2063 /* Sadly, it means code duplication :( */
2064 if ( (selectret > 0) || (0 == mcs_total) )
2069 if (rfds && (rfds->handles_pos > 0))
2070 retcode += check_handles_status (rfds, GNUNET_NO, NULL);
2072 /* wfds handles remain untouched, on W32
2073 we pretend our pipes are "always" write-ready */
2076 if (efds && (efds->handles_pos > 0))
2077 retcode += check_handles_status (efds, GNUNET_YES, NULL);
2081 GNUNET_NETWORK_fdset_zero (rfds);
2082 if (selectret != -1)
2083 GNUNET_NETWORK_fdset_copy_native (rfds, &aread, selectret);
2087 GNUNET_NETWORK_fdset_zero (wfds);
2088 if (selectret != -1)
2089 GNUNET_NETWORK_fdset_copy_native (wfds, &awrite, selectret);
2093 GNUNET_NETWORK_fdset_zero (efds);
2094 if (selectret != -1)
2095 GNUNET_NETWORK_fdset_copy_native (efds, &aexcept, selectret);
2097 if (-1 == selectret)
2099 /* Add our select() FDs to the total return value */
2100 retcode += selectret;
2104 /* If we got this far, use slower implementation that is able to do a waiting select
2105 on both sockets and pipes simultaneously */
2107 /* Events for pipes */
2108 if (! hEventReadReady)
2109 hEventReadReady = CreateEvent (NULL, TRUE, TRUE, NULL);
2110 if (! hEventPipeWrite)
2111 hEventPipeWrite = CreateEvent (NULL, TRUE, TRUE, NULL);
2118 FD_COPY (&rfds->sds, &aread);
2120 FD_COPY (&wfds->sds, &awrite);
2122 FD_COPY (&efds->sds, &aexcept);
2123 /* We will first Add the PIPES to the events */
2124 /* Track how far in `handle_array` the read pipes go,
2125 so we may by-pass them quickly if none of them
2128 if (rfds && (rfds->handles_pos > 0))
2130 for (i = 0; i <rfds->handles_pos; i++)
2132 fh = rfds->handles[i];
2133 if (fh->type == GNUNET_DISK_HANLDE_TYPE_EVENT)
2135 handle_array[nhandles++] = fh->h;
2138 if (fh->type != GNUNET_DISK_HANLDE_TYPE_PIPE)
2140 /* Read zero bytes to check the status of the pipe */
2141 if (! ReadFile (fh->h, NULL, 0, NULL, fh->oOverlapRead))
2143 DWORD error_code = GetLastError ();
2145 if (error_code == ERROR_IO_PENDING)
2147 /* add as unready */
2148 handle_array[nhandles++] = fh->oOverlapRead->hEvent;
2154 handle_array[nhandles++] = hEventReadReady;
2160 /* error also counts as ready */
2161 handle_array[nhandles++] = hEventReadReady;
2167 if (wfds && (wfds->handles_pos > 0))
2169 LOG (GNUNET_ERROR_TYPE_DEBUG,
2170 "Adding the write ready event to the array as %d\n",
2172 handle_array[nhandles++] = hEventPipeWrite;
2178 LOG (GNUNET_ERROR_TYPE_DEBUG,
2179 "Adding the socket event to the array as %d\n",
2181 handle_array[nhandles++] = select_finished_event;
2182 if (timeout.rel_value_us == GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us)
2188 select_timeout.tv_sec = timeout.rel_value_us / GNUNET_TIME_UNIT_SECONDS.rel_value_us;
2189 select_timeout.tv_usec = (timeout.rel_value_us -
2190 (select_timeout.tv_sec *
2191 GNUNET_TIME_UNIT_SECONDS.rel_value_us));
2192 sp.tv = &select_timeout;
2194 FD_SET (select_wakeup_socket, &aread);
2197 i = recv (select_wakeup_socket,
2198 (char *) &returnedpos,
2205 /* Failed connections cause sockets to be set in errorfds on W32,
2206 * but on POSIX it should set them in writefds.
2207 * First copy all awrite sockets to aexcept, later we'll
2208 * check aexcept and set its contents in awrite as well
2209 * Sockets are also set in errorfds when OOB data is available,
2210 * but we don't use OOB data.
2212 for (i = 0; i < awrite.fd_count; i++)
2213 FD_SET (awrite.fd_array[i],
2215 ResetEvent (select_finished_event);
2216 SetEvent (select_standby_event);
2219 /* NULL-terminate array */
2220 handle_array[nhandles] = NULL;
2221 LOG (GNUNET_ERROR_TYPE_DEBUG,
2222 "nfds: %d, handles: %d, will wait: %llu mcs\n",
2229 = WaitForMultipleObjects (nhandles,
2233 LOG (GNUNET_ERROR_TYPE_DEBUG,
2234 "WaitForMultipleObjects Returned: %d\n",
2239 GNUNET_break (0); /* This branch shouldn't actually be executed...*/
2240 i = (int) WaitForSingleObject (select_finished_event,
2242 returncode = WAIT_TIMEOUT;
2246 /* Shouldn't come this far. If it does - investigate. */
2252 /* Don't wake up select-thread when delay is 0, it should return immediately
2253 * and wake up by itself.
2256 i = send (select_send_socket,
2257 (const char *) &returnedpos,
2260 i = (int) WaitForSingleObject (select_finished_event,
2262 LOG (GNUNET_ERROR_TYPE_DEBUG,
2263 "Finished waiting for the select thread: %d %d\n",
2270 i = recv (select_wakeup_socket,
2271 (char *) &returnedpos,
2275 /* Check aexcept, add its contents to awrite */
2276 for (i = 0; i < aexcept.fd_count; i++)
2277 FD_SET (aexcept.fd_array[i], &awrite);
2280 returnedpos = returncode - WAIT_OBJECT_0;
2281 LOG (GNUNET_ERROR_TYPE_DEBUG,
2282 "return pos is: %d\n",
2287 /* We queued a zero-long read on each pipe to check
2288 * its state, now we must cancel these read operations.
2289 * This must be done while rfds->handles_pos is still
2290 * intact and matches the number of read handles that we
2291 * got from the caller.
2293 for (i = 0; i < rfds->handles_pos; i++)
2295 fh = rfds->handles[i];
2296 if (GNUNET_DISK_HANLDE_TYPE_PIPE == fh->type)
2300 /* We may have some pipes ready for reading. */
2301 if (returnedpos < read_pipes_off)
2302 retcode += check_handles_status (rfds, GNUNET_NO, handle_array[returnedpos]);
2304 rfds->handles_pos = 0;
2306 if (-1 != sp.status)
2307 GNUNET_NETWORK_fdset_copy_native (rfds, &aread, retcode);
2311 retcode += wfds->handles_pos;
2312 /* wfds handles remain untouched */
2313 if (-1 != sp.status)
2314 GNUNET_NETWORK_fdset_copy_native (wfds, &awrite, retcode);
2318 retcode += check_handles_status (rfds,
2320 returnedpos < nhandles ? handle_array[returnedpos] : NULL);
2321 if (-1 != sp.status)
2322 GNUNET_NETWORK_fdset_copy_native (efds, &aexcept, retcode);
2326 retcode += sp.status;
2334 /* end of network.c */