diff options
Diffstat (limited to 'sys/kern/sys_socket.c')
| -rw-r--r-- | sys/kern/sys_socket.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/sys/kern/sys_socket.c b/sys/kern/sys_socket.c new file mode 100644 index 0000000..c8a6198 --- /dev/null +++ b/sys/kern/sys_socket.c @@ -0,0 +1,217 @@ +/* + * Copyright (c) 1982, 1986, 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)sys_socket.c 8.1 (Berkeley) 6/10/93 + * $FreeBSD$ + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/file.h> +#include <sys/protosw.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/filio.h> /* XXX */ +#include <sys/sockio.h> +#include <sys/stat.h> +#include <sys/uio.h> +#include <sys/filedesc.h> +#include <sys/ucred.h> + +#include <net/if.h> +#include <net/route.h> + +struct fileops socketops = { + soo_read, soo_write, soo_ioctl, soo_poll, sokqfilter, + soo_stat, soo_close +}; + +/* ARGSUSED */ +int +soo_read(fp, uio, cred, flags, td) + struct file *fp; + struct uio *uio; + struct ucred *cred; + struct thread *td; + int flags; +{ + struct socket *so = (struct socket *)fp->f_data; + int error; + + mtx_lock(&Giant); + error = so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0); + mtx_unlock(&Giant); + return (error); +} + +/* ARGSUSED */ +int +soo_write(fp, uio, cred, flags, td) + struct file *fp; + struct uio *uio; + struct ucred *cred; + struct thread *td; + int flags; +{ + struct socket *so = (struct socket *)fp->f_data; + int error; + + mtx_lock(&Giant); + error = so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0, + uio->uio_td); + mtx_unlock(&Giant); + return (error); +} + +int +soo_ioctl(fp, cmd, data, td) + struct file *fp; + u_long cmd; + register caddr_t data; + struct thread *td; +{ + register struct socket *so = (struct socket *)fp->f_data; + + switch (cmd) { + + case FIONBIO: + if (*(int *)data) + so->so_state |= SS_NBIO; + else + so->so_state &= ~SS_NBIO; + return (0); + + case FIOASYNC: + if (*(int *)data) { + so->so_state |= SS_ASYNC; + so->so_rcv.sb_flags |= SB_ASYNC; + so->so_snd.sb_flags |= SB_ASYNC; + } else { + so->so_state &= ~SS_ASYNC; + so->so_rcv.sb_flags &= ~SB_ASYNC; + so->so_snd.sb_flags &= ~SB_ASYNC; + } + return (0); + + case FIONREAD: + *(int *)data = so->so_rcv.sb_cc; + return (0); + + case FIOSETOWN: + return (fsetown(*(int *)data, &so->so_sigio)); + + case FIOGETOWN: + *(int *)data = fgetown(so->so_sigio); + return (0); + + case SIOCSPGRP: + return (fsetown(-(*(int *)data), &so->so_sigio)); + + case SIOCGPGRP: + *(int *)data = -fgetown(so->so_sigio); + return (0); + + case SIOCATMARK: + *(int *)data = (so->so_state&SS_RCVATMARK) != 0; + return (0); + } + /* + * Interface/routing/protocol specific ioctls: + * interface and routing ioctls should have a + * different entry since a socket's unnecessary + */ + if (IOCGROUP(cmd) == 'i') + return (ifioctl(so, cmd, data, td)); + if (IOCGROUP(cmd) == 'r') + return (rtioctl(cmd, data)); + return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, td)); +} + +int +soo_poll(fp, events, cred, td) + struct file *fp; + int events; + struct ucred *cred; + struct thread *td; +{ + struct socket *so = (struct socket *)fp->f_data; + return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, td); +} + +int +soo_stat(fp, ub, td) + struct file *fp; + struct stat *ub; + struct thread *td; +{ + struct socket *so = (struct socket *)fp->f_data; + + bzero((caddr_t)ub, sizeof (*ub)); + ub->st_mode = S_IFSOCK; + /* + * If SS_CANTRCVMORE is set, but there's still data left in the + * receive buffer, the socket is still readable. + */ + if ((so->so_state & SS_CANTRCVMORE) == 0 || + so->so_rcv.sb_cc != 0) + ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; + if ((so->so_state & SS_CANTSENDMORE) == 0) + ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; + ub->st_size = so->so_rcv.sb_cc; + ub->st_uid = so->so_cred->cr_uid; + ub->st_gid = so->so_cred->cr_gid; + return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub)); +} + +/* + * API socket close on file pointer. We call soclose() to close the + * socket (including initiating closing protocols). soclose() will + * sorele() the file reference but the actual socket will not go away + * until the socket's ref count hits 0. + */ +/* ARGSUSED */ +int +soo_close(fp, td) + struct file *fp; + struct thread *td; +{ + int error = 0; + struct socket *so; + + so = (struct socket *)fp->f_data; + fp->f_ops = &badfileops; + fp->f_data = 0; + + if (so) + error = soclose(so); + return (error); +} |
