/* $NetBSD: sys_socket.c,v 1.84 2024/12/06 18:44:00 riastradh Exp $ */ /*- * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Andrew Doran. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * 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. 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 8.3 (Berkeley) 2/14/95 */ #include __KERNEL_RCSID(0, "$NetBSD: sys_socket.c,v 1.84 2024/12/06 18:44:00 riastradh Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int soo_fpathconf(struct file *, int, register_t *); static int soo_posix_fadvise(struct file *, off_t, off_t, int); const struct fileops socketops = { .fo_name = "socket", .fo_read = soo_read, .fo_write = soo_write, .fo_ioctl = soo_ioctl, .fo_fcntl = fnullop_fcntl, .fo_poll = soo_poll, .fo_stat = soo_stat, .fo_close = soo_close, .fo_kqfilter = soo_kqfilter, .fo_restart = soo_restart, .fo_fpathconf = soo_fpathconf, .fo_posix_fadvise = soo_posix_fadvise, }; int (*ifioctl)(struct socket *, u_long, void *, struct lwp *) = (void *)eopnotsupp; /* ARGSUSED */ int soo_read(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, int flags) { struct socket *so = fp->f_socket; int error; error = (*so->so_receive)(so, NULL, uio, NULL, NULL, NULL); return error; } /* ARGSUSED */ int soo_write(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, int flags) { struct socket *so = fp->f_socket; int error; error = (*so->so_send)(so, NULL, uio, NULL, NULL, 0, curlwp); return error; } int soo_ioctl(file_t *fp, u_long cmd, void *data) { struct socket *so = fp->f_socket; int error = 0; switch (cmd) { case FIONBIO: solock(so); if (*(int *)data) so->so_state |= SS_NBIO; else so->so_state &= ~SS_NBIO; sounlock(so); break; case FIOASYNC: solock(so); if (*(int *)data) { so->so_rcv.sb_flags |= SB_ASYNC; so->so_snd.sb_flags |= SB_ASYNC; } else { so->so_rcv.sb_flags &= ~SB_ASYNC; so->so_snd.sb_flags &= ~SB_ASYNC; } sounlock(so); break; case FIONREAD: *(int *)data = so->so_rcv.sb_cc; break; case FIONWRITE: *(int *)data = so->so_snd.sb_cc; break; case FIONSPACE: /* * See the comment around sbspace()'s definition * in sys/socketvar.h in face of counts about maximum * to understand the following test. We detect overflow * and return zero. */ solock(so); if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc) || (so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt)) *(int *)data = 0; else *(int *)data = sbspace(&so->so_snd); sounlock(so); break; case SIOCSPGRP: case FIOSETOWN: case TIOCSPGRP: error = fsetown(&so->so_pgid, cmd, data); break; case SIOCGPGRP: case FIOGETOWN: case TIOCGPGRP: error = fgetown(so->so_pgid, cmd, data); break; case SIOCATMARK: *(int *)data = (so->so_state&SS_RCVATMARK) != 0; break; case SIOCPEELOFF: solock(so); error = do_sys_peeloff(so, data); sounlock(so); break; default: /* * Interface/routing/protocol specific ioctls: * interface and routing ioctls should have a * different entry since a socket's unnecessary */ if (IOCGROUP(cmd) == 'i') /* * KERNEL_LOCK will be held later if if_ioctl() of the * interface isn't MP-safe. */ error = ifioctl(so, cmd, data, curlwp); else { KERNEL_LOCK(1, NULL); error = (*so->so_proto->pr_usrreqs->pr_ioctl)(so, cmd, data, NULL); KERNEL_UNLOCK_ONE(NULL); } break; } return error; } int soo_poll(file_t *fp, int events) { return sopoll(fp->f_socket, events); } int soo_stat(file_t *fp, struct stat *ub) { struct socket *so = fp->f_socket; int error; memset(ub, 0, sizeof(*ub)); ub->st_mode = S_IFSOCK; solock(so); error = (*so->so_proto->pr_usrreqs->pr_stat)(so, ub); sounlock(so); return error; } /* ARGSUSED */ int soo_close(file_t *fp) { int error = 0; if (fp->f_socket) error = soclose(fp->f_socket); fp->f_socket = NULL; return error; } void soo_restart(file_t *fp) { sorestart(fp->f_socket); } static int soo_fpathconf(struct file *fp, int name, register_t *retval) { switch (name) { case _PC_PIPE_BUF: *retval = PIPE_BUF; return 0; default: return SET_ERROR(EINVAL); } } static int soo_posix_fadvise(struct file *fp, off_t offset, off_t len, int advice) { return SET_ERROR(ESPIPE); }