78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2013.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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sys/socket/socket.cpp
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Creates a new unconnected socket.
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*******************************************************************************/
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#include <sys/socket.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stddef.h>
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static const char* get_socket_factory(int domain, int type, int protocol)
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{
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if ( domain == AF_INET )
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{
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if ( type == SOCK_DGRAM && !protocol )
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return "/dev/net/ipv4/udp";
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if ( type == SOCK_STREAM && !protocol )
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return "/dev/net/ipv4/tcp";
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return errno = EPROTONOSUPPORT, (const char*) NULL;
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}
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if ( domain == AF_INET6 )
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{
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if ( type == SOCK_DGRAM && !protocol )
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return "/dev/net/ipv6/udp";
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if ( type == SOCK_STREAM && !protocol )
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return "/dev/net/ipv6/tcp";
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return errno = EPROTONOSUPPORT, (const char*) NULL;
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}
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if ( domain == AF_UNIX )
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{
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if ( type == SOCK_DGRAM && !protocol )
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return "/dev/net/fs/datagram";
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if ( type == SOCK_STREAM && !protocol )
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return "/dev/net/fs/stream";
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return errno = EPROTONOSUPPORT, (const char*) NULL;
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}
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return errno = EAFNOSUPPORT, (const char*) NULL;
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}
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extern "C" int socket(int domain, int type, int protocol)
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{
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int open_flags = O_RDWR;
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if ( type & SOCK_NONBLOCK ) open_flags |= O_NONBLOCK;
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if ( type & SOCK_CLOEXEC ) open_flags |= O_CLOEXEC;
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if ( type & SOCK_CLOFORK ) open_flags |= O_CLOFORK;
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type &= SOCK_TYPE_MASK;
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const char* factory = get_socket_factory(domain, type, protocol);
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if ( !factory )
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return -1;
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int ret = open(factory, open_flags);
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if ( ret < 0 && errno == ENOENT )
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errno = EPROTONOSUPPORT;
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return ret;
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}
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