41 lines
1.6 KiB
C
41 lines
1.6 KiB
C
/*
|
|
* Copyright (c) 2013 Jonas 'Sortie' Termansen.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* sys/socket/accept4.c
|
|
* Accepts a connection from a listening socket.
|
|
*/
|
|
|
|
#include <sys/socket.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#include <stddef.h>
|
|
|
|
DEFN_SYSCALL4(int, sys_accept4, SYSCALL_ACCEPT4, int, void*, size_t*, int);
|
|
|
|
int accept4(int fd, struct sockaddr* restrict addr, socklen_t* restrict addrlen,
|
|
int flags)
|
|
{
|
|
// Deal with that the kernel doesn't need to understand socklen_t. Since
|
|
// that type is designed to be size_t-sized anyway, the compiler should be
|
|
// able to optimize all this type safety away, but this function will work
|
|
// should the assumption sizeof(size_t) == sizeof(socklen_t) change.
|
|
size_t addrlen_size_t = addrlen ? *addrlen : 0;
|
|
size_t* addrlen_size_t_ptr = addrlen ? &addrlen_size_t : NULL;
|
|
int retfd = sys_accept4(fd, addr, addrlen_size_t_ptr, flags);
|
|
if ( addrlen )
|
|
*addrlen = addrlen_size_t;
|
|
return retfd;
|
|
}
|