blob: d35f8894fa4597f73accd9a718f04f9d65443eaf (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
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;
}
|
