73 lines
2.2 KiB
C
73 lines
2.2 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/socket.c
|
|
* Creates a new unconnected socket.
|
|
*/
|
|
|
|
#include <sys/socket.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stddef.h>
|
|
|
|
static const char* get_socket_factory(int domain, int type, int protocol)
|
|
{
|
|
if ( domain == AF_INET )
|
|
{
|
|
if ( type == SOCK_DGRAM && !protocol )
|
|
return "/dev/net/ipv4/udp";
|
|
if ( type == SOCK_STREAM && !protocol )
|
|
return "/dev/net/ipv4/tcp";
|
|
return errno = EPROTONOSUPPORT, (const char*) NULL;
|
|
}
|
|
|
|
if ( domain == AF_INET6 )
|
|
{
|
|
if ( type == SOCK_DGRAM && !protocol )
|
|
return "/dev/net/ipv6/udp";
|
|
if ( type == SOCK_STREAM && !protocol )
|
|
return "/dev/net/ipv6/tcp";
|
|
return errno = EPROTONOSUPPORT, (const char*) NULL;
|
|
}
|
|
|
|
if ( domain == AF_UNIX )
|
|
{
|
|
if ( type == SOCK_DGRAM && !protocol )
|
|
return "/dev/net/fs/datagram";
|
|
if ( type == SOCK_STREAM && !protocol )
|
|
return "/dev/net/fs/stream";
|
|
return errno = EPROTONOSUPPORT, (const char*) NULL;
|
|
}
|
|
|
|
return errno = EAFNOSUPPORT, (const char*) NULL;
|
|
}
|
|
|
|
int socket(int domain, int type, int protocol)
|
|
{
|
|
int open_flags = O_RDWR;
|
|
if ( type & SOCK_NONBLOCK ) open_flags |= O_NONBLOCK;
|
|
if ( type & SOCK_CLOEXEC ) open_flags |= O_CLOEXEC;
|
|
if ( type & SOCK_CLOFORK ) open_flags |= O_CLOFORK;
|
|
type &= SOCK_TYPE_MASK;
|
|
const char* factory = get_socket_factory(domain, type, protocol);
|
|
if ( !factory )
|
|
return -1;
|
|
int ret = open(factory, open_flags);
|
|
if ( ret < 0 && errno == ENOENT )
|
|
errno = EPROTONOSUPPORT;
|
|
return ret;
|
|
}
|