49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/* Return whether socket supports 64-bit timestamps.
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Copyright (C) 2022 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 <unistd.h>
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#include <sys/syscall.h>
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#include <sys/socket.h>
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#include <support/support.h>
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#ifdef __linux__
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# include <socket-constants-time64.h>
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#endif
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bool
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support_socket_so_timestamp_time64 (int fd)
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{
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#ifdef __linux__
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# if __LINUX_KERNEL_VERSION >= 0x050100 \
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|| __WORDSIZE == 64 \
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|| (defined __SYSCALL_WORDSIZE && __SYSCALL_WORDSIZE == 64)
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return true;
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# else
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int level = SOL_SOCKET;
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int optname = COMPAT_SO_TIMESTAMP_NEW;
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int optval;
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socklen_t len = sizeof (optval);
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int r = syscall (__NR_getsockopt, fd, level, optname, &optval, &len);
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return r != -1;
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# endif
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#else
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return false;
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#endif
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}
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