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// Copyright (c) 2015-2016 Nuxi, https://nuxi.nl/
//
// SPDX-License-Identifier: BSD-2-Clause
#include <sys/socket.h>
#include <wasi/api.h>
#include <errno.h>
#include <string.h>
int getsockopt(int socket, int level, int option_name,
void *restrict option_value, socklen_t *restrict option_len) {
// Only support SOL_SOCKET options for now.
if (level != SOL_SOCKET) {
errno = ENOPROTOOPT;
return -1;
}
int value;
switch (option_name) {
case SO_TYPE: {
// Return the type of the socket. This information can simply be
// obtained by looking at the file descriptor type.
__wasi_fdstat_t fsb;
if (__wasi_fd_fdstat_get(socket, &fsb) != 0) {
errno = EBADF;
return -1;
}
if (fsb.fs_filetype != __WASI_FILETYPE_SOCKET_DGRAM &&
fsb.fs_filetype != __WASI_FILETYPE_SOCKET_STREAM) {
errno = ENOTSOCK;
return -1;
}
value = fsb.fs_filetype;
break;
}
default: {
errno = ENOPROTOOPT;
return -1;
}
}
// Copy out integer value.
memcpy(option_value, &value,
*option_len < sizeof(int) ? *option_len : sizeof(int));
*option_len = sizeof(int);
return 0;
}
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