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author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-12-13 11:36:42 -0300 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-01-28 17:46:43 -0300 |
commit | 38bc0f4e78934aab455b31af05cefcbf3c22bece (patch) | |
tree | b2968c33e1c52ac5b4c0e3b783a88fc75cc208e6 /support/support_socket_so_timestamp_time64.c | |
parent | 1d1ce7d637fdeb911f82d10f6a23287b5dca2a3b (diff) | |
download | glibc-38bc0f4e78934aab455b31af05cefcbf3c22bece.tar.gz glibc-38bc0f4e78934aab455b31af05cefcbf3c22bece.tar.xz glibc-38bc0f4e78934aab455b31af05cefcbf3c22bece.zip |
support: Add support_socket_so_timestamp_time64
Check if the socket support 64-bit network packages timestamps (SO_TIMESTAMP and SO_TIMESTAMPNS). This will be used on recvmsg and recvmmsg tests to check if the timestamp should be generated. Reviewed-by: Florian Weimer <fweimer@redhat.com>
Diffstat (limited to 'support/support_socket_so_timestamp_time64.c')
-rw-r--r-- | support/support_socket_so_timestamp_time64.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/support/support_socket_so_timestamp_time64.c b/support/support_socket_so_timestamp_time64.c new file mode 100644 index 0000000000..54bf3f4272 --- /dev/null +++ b/support/support_socket_so_timestamp_time64.c @@ -0,0 +1,48 @@ +/* Return whether socket supports 64-bit timestamps. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <unistd.h> +#include <sys/syscall.h> +#include <sys/socket.h> +#include <support/support.h> +#ifdef __linux__ +# include <socket-constants-time64.h> +#endif + +bool +support_socket_so_timestamp_time64 (int fd) +{ +#ifdef __linux__ +# if __LINUX_KERNEL_VERSION >= 0x050100 \ + || __WORDSIZE == 64 \ + || (defined __SYSCALL_WORDSIZE && __SYSCALL_WORDSIZE == 64) + return true; +# else + int level = SOL_SOCKET; + int optname = COMPAT_SO_TIMESTAMP_NEW; + int optval; + socklen_t len = sizeof (optval); + + int r = syscall (__NR_getsockopt, fd, level, optname, &optval, &len); + return r != -1; +# endif +#else + return false; +#endif +} |