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114 lines
3.5 KiB
C
114 lines
3.5 KiB
C
/* Copyright (C) 1992-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <fcntl.h>
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#include <fcntl-internal.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <hurd.h>
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#include <hurd/fd.h>
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#include <hurd/socket.h>
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/* Create two new sockets, of type TYPE in domain DOMAIN and using
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protocol PROTOCOL, which are connected to each other, and put file
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descriptors for them in FDS[0] and FDS[1]. If PROTOCOL is zero,
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one will be chosen automatically. Returns 0 on success, -1 for errors. */
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int
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__socketpair (int domain, int type, int protocol, int fds[2])
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{
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error_t err;
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socket_t server, sock1, sock2;
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int d1, d2;
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int flags = sock_to_o_flags (type & ~SOCK_TYPE_MASK);
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type &= SOCK_TYPE_MASK;
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if (flags & ~(O_CLOEXEC | O_NONBLOCK))
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return __hurd_fail (EINVAL);
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if (fds == NULL)
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return __hurd_fail (EINVAL);
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/* Find the domain's socket server. */
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server = _hurd_socket_server (domain, 0);
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if (server == MACH_PORT_NULL)
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return -1;
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/* Create two sockets and connect them together. */
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err = __socket_create (server, type, protocol, &sock1);
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if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED
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|| err == MIG_BAD_ID || err == EOPNOTSUPP)
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{
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/* On the first use of the socket server during the operation,
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allow for the old server port dying. */
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server = _hurd_socket_server (domain, 1);
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if (server == MACH_PORT_NULL)
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return -1;
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err = __socket_create (server, type, protocol, &sock1);
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}
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/* TODO: do we need special ERR massaging here, like it is done in
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__socket? */
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if (! err)
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{
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if (flags & O_NONBLOCK)
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err = __io_set_some_openmodes (sock1, O_NONBLOCK);
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/* TODO: do we need special ERR massaging after the previous call? */
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}
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if (err)
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return __hurd_fail (err);
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if (err = __socket_create (server, type, protocol, &sock2))
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{
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__mach_port_deallocate (__mach_task_self (), sock1);
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return __hurd_fail (err);
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}
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if (flags & O_NONBLOCK)
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err = __io_set_some_openmodes (sock2, O_NONBLOCK);
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/* TODO: do we need special ERR massaging after the previous call? */
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if (! err)
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err = __socket_connect2 (sock1, sock2);
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if (err)
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{
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__mach_port_deallocate (__mach_task_self (), sock1);
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__mach_port_deallocate (__mach_task_self (), sock2);
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return __hurd_fail (err);
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}
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/* Put the sockets into file descriptors. */
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d1 = _hurd_intern_fd (sock1, O_IGNORE_CTTY | flags, 1);
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if (d1 < 0)
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{
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__mach_port_deallocate (__mach_task_self (), sock2);
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return -1;
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}
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d2 = _hurd_intern_fd (sock2, O_IGNORE_CTTY | flags, 1);
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if (d2 < 0)
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{
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err = errno;
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(void) __close (d1);
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return __hurd_fail (err);
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}
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fds[0] = d1;
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fds[1] = d2;
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return 0;
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}
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weak_alias (__socketpair, socketpair)
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