/* * 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 */ #include __FBSDID("$FreeBSD$"); #include "opt_mac.h" #include #include #include #include #include #include #include #include #include #include /* XXX */ #include #include #include #include #include #include struct fileops socketops = { .fo_read = soo_read, .fo_write = soo_write, .fo_ioctl = soo_ioctl, .fo_poll = soo_poll, .fo_kqfilter = soo_kqfilter, .fo_stat = soo_stat, .fo_close = soo_close, .fo_flags = DFLAG_PASSABLE }; /* ARGSUSED */ int soo_read(fp, uio, active_cred, flags, td) struct file *fp; struct uio *uio; struct ucred *active_cred; struct thread *td; int flags; { struct socket *so = fp->f_data; int error; mtx_lock(&Giant); #ifdef MAC error = mac_check_socket_receive(active_cred, so); if (error) { mtx_unlock(&Giant); return (error); } #endif 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, active_cred, flags, td) struct file *fp; struct uio *uio; struct ucred *active_cred; struct thread *td; int flags; { struct socket *so = fp->f_data; int error; mtx_lock(&Giant); #ifdef MAC error = mac_check_socket_send(active_cred, so); if (error) { mtx_unlock(&Giant); return (error); } #endif 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, active_cred, td) struct file *fp; u_long cmd; void *data; struct ucred *active_cred; struct thread *td; { register struct socket *so = 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, active_cred, td) struct file *fp; int events; struct ucred *active_cred; struct thread *td; { struct socket *so = fp->f_data; return so->so_proto->pr_usrreqs->pru_sopoll(so, events, fp->f_cred, td); } int soo_stat(fp, ub, active_cred, td) struct file *fp; struct stat *ub; struct ucred *active_cred; struct thread *td; { struct socket *so = 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 - so->so_rcv.sb_ctl; 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 = fp->f_data; fp->f_ops = &badfileops; fp->f_data = NULL; if (so) error = soclose(so); return (error); }