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//===-- Linux implementation of sendto ------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/sys/socket/sendto.h"
#include <linux/net.h> // For SYS_SOCKET socketcall number.
#include <sys/syscall.h> // For syscall numbers.
#include "hdr/types/socklen_t.h"
#include "hdr/types/ssize_t.h"
#include "hdr/types/struct_sockaddr.h"
#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
#include "src/__support/common.h"
#include "src/__support/libc_errno.h"
namespace LIBC_NAMESPACE_DECL {
LLVM_LIBC_FUNCTION(ssize_t, sendto,
(int sockfd, const void *buf, size_t len, int flags,
const struct sockaddr *dest_addr, socklen_t addrlen)) {
#ifdef SYS_sendto
ssize_t ret = LIBC_NAMESPACE::syscall_impl<ssize_t>(
SYS_sendto, sockfd, buf, len, flags, dest_addr, addrlen);
#elif defined(SYS_socketcall)
unsigned long sockcall_args[6] = {static_cast<unsigned long>(sockfd),
reinterpret_cast<unsigned long>(buf),
static_cast<unsigned long>(len),
static_cast<unsigned long>(flags),
reinterpret_cast<unsigned long>(dest_addr),
static_cast<unsigned long>(addrlen)};
ssize_t ret = LIBC_NAMESPACE::syscall_impl<ssize_t>(
SYS_socketcall, SYS_SENDTO, sockcall_args);
#else
#error "socket and socketcall syscalls unavailable for this platform."
#endif
if (ret < 0) {
libc_errno = static_cast<int>(-ret);
return -1;
}
return ret;
}
} // namespace LIBC_NAMESPACE_DECL
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