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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 13:54:38 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 13:54:38 +0000 |
commit | 8c1ab65c0f548d20b7f177bdb736daaf603340e1 (patch) | |
tree | df55b7e75bf43f2bf500845b105afe3ac3a5157e /libc-bottom-half/cloudlibc/src/libc/sys/socket/recv.c | |
parent | Initial commit. (diff) | |
download | wasi-libc-upstream/0.0_git20221206.8b7148f.tar.xz wasi-libc-upstream/0.0_git20221206.8b7148f.zip |
Adding upstream version 0.0~git20221206.8b7148f.upstream/0.0_git20221206.8b7148f
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'libc-bottom-half/cloudlibc/src/libc/sys/socket/recv.c')
-rw-r--r-- | libc-bottom-half/cloudlibc/src/libc/sys/socket/recv.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/libc-bottom-half/cloudlibc/src/libc/sys/socket/recv.c b/libc-bottom-half/cloudlibc/src/libc/sys/socket/recv.c new file mode 100644 index 0000000..d35f889 --- /dev/null +++ b/libc-bottom-half/cloudlibc/src/libc/sys/socket/recv.c @@ -0,0 +1,40 @@ +// Copyright (c) 2015-2017 Nuxi, https://nuxi.nl/ +// +// SPDX-License-Identifier: BSD-2-Clause + +#include <sys/socket.h> + +#include <assert.h> +#include <wasi/api.h> +#include <errno.h> +#include <stdint.h> + +static_assert(MSG_PEEK == __WASI_RIFLAGS_RECV_PEEK, "Value mismatch"); +static_assert(MSG_WAITALL == __WASI_RIFLAGS_RECV_WAITALL, "Value mismatch"); + +ssize_t recv(int socket, void *restrict buffer, size_t length, int flags) { + // Validate flags. + if ((flags & ~(MSG_PEEK | MSG_WAITALL)) != 0) { + errno = EOPNOTSUPP; + return -1; + } + + // Prepare input parameters. + __wasi_iovec_t iov = {.buf = buffer, .buf_len = length}; + __wasi_iovec_t *ri_data = &iov; + size_t ri_data_len = 1; + __wasi_riflags_t ri_flags = flags; + + // Perform system call. + size_t ro_datalen; + __wasi_roflags_t ro_flags; + __wasi_errno_t error = __wasi_sock_recv(socket, + ri_data, ri_data_len, ri_flags, + &ro_datalen, + &ro_flags); + if (error != 0) { + errno = error; + return -1; + } + return ro_datalen; +} |