1 /* $OpenBSD: sys_socket.c,v 1.10 2005/12/13 10:33:14 jsg Exp $ */ 2 /* $NetBSD: sys_socket.c,v 1.13 1995/08/12 23:59:09 mycroft Exp $ */ 3 4 /* 5 * Copyright (c) 1982, 1986, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)sys_socket.c 8.1 (Berkeley) 6/10/93 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/file.h> 38 #include <sys/proc.h> 39 #include <sys/mbuf.h> 40 #include <sys/protosw.h> 41 #include <sys/socket.h> 42 #include <sys/socketvar.h> 43 #include <sys/ioctl.h> 44 #include <sys/poll.h> 45 #include <sys/stat.h> 46 47 #include <net/if.h> 48 #include <net/route.h> 49 50 struct fileops socketops = { 51 soo_read, soo_write, soo_ioctl, soo_poll, soo_kqfilter, 52 soo_stat, soo_close 53 }; 54 55 /* ARGSUSED */ 56 int 57 soo_read(struct file *fp, off_t *poff, struct uio *uio, struct ucred *cred) 58 { 59 60 return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0, 61 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 62 } 63 64 /* ARGSUSED */ 65 int 66 soo_write(struct file *fp, off_t *poff, struct uio *uio, struct ucred *cred) 67 { 68 69 return (sosend((struct socket *)fp->f_data, (struct mbuf *)0, 70 uio, (struct mbuf *)0, (struct mbuf *)0, 0)); 71 } 72 73 int 74 soo_ioctl(struct file *fp, u_long cmd, caddr_t data, struct proc *p) 75 { 76 struct socket *so = (struct socket *)fp->f_data; 77 78 switch (cmd) { 79 80 case FIONBIO: 81 if (*(int *)data) 82 so->so_state |= SS_NBIO; 83 else 84 so->so_state &= ~SS_NBIO; 85 return (0); 86 87 case FIOASYNC: 88 if (*(int *)data) { 89 so->so_state |= SS_ASYNC; 90 so->so_rcv.sb_flags |= SB_ASYNC; 91 so->so_snd.sb_flags |= SB_ASYNC; 92 } else { 93 so->so_state &= ~SS_ASYNC; 94 so->so_rcv.sb_flags &= ~SB_ASYNC; 95 so->so_snd.sb_flags &= ~SB_ASYNC; 96 } 97 return (0); 98 99 case FIONREAD: 100 *(int *)data = so->so_rcv.sb_cc; 101 return (0); 102 103 case SIOCSPGRP: 104 so->so_pgid = *(int *)data; 105 so->so_siguid = p->p_cred->p_ruid; 106 so->so_sigeuid = p->p_ucred->cr_uid; 107 return (0); 108 109 case SIOCGPGRP: 110 *(int *)data = so->so_pgid; 111 return (0); 112 113 case SIOCATMARK: 114 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 115 return (0); 116 } 117 /* 118 * Interface/routing/protocol specific ioctls: 119 * interface and routing ioctls should have a 120 * different entry since a socket's unnecessary 121 */ 122 if (IOCGROUP(cmd) == 'i') 123 return (ifioctl(so, cmd, data, p)); 124 if (IOCGROUP(cmd) == 'r') 125 return (rtioctl(cmd, data, p)); 126 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 127 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0)); 128 } 129 130 int 131 soo_poll(struct file *fp, int events, struct proc *p) 132 { 133 struct socket *so = (struct socket *)fp->f_data; 134 int revents = 0; 135 int s = splsoftnet(); 136 137 if (events & (POLLIN | POLLRDNORM)) { 138 if (soreadable(so)) 139 revents |= events & (POLLIN | POLLRDNORM); 140 } 141 if (events & (POLLOUT | POLLWRNORM)) { 142 if (sowriteable(so)) 143 revents |= events & (POLLOUT | POLLWRNORM); 144 } 145 if (events & (POLLPRI | POLLRDBAND)) { 146 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) 147 revents |= events & (POLLPRI | POLLRDBAND); 148 } 149 if (revents == 0) { 150 if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) { 151 selrecord(p, &so->so_rcv.sb_sel); 152 so->so_rcv.sb_flags |= SB_SEL; 153 } 154 if (events & (POLLOUT | POLLWRNORM)) { 155 selrecord(p, &so->so_snd.sb_sel); 156 so->so_snd.sb_flags |= SB_SEL; 157 } 158 } 159 splx(s); 160 return (revents); 161 } 162 163 int 164 soo_stat(struct file *fp, struct stat *ub, struct proc *p) 165 { 166 struct socket *so = (struct socket *)fp->f_data; 167 168 bzero((caddr_t)ub, sizeof (*ub)); 169 ub->st_mode = S_IFSOCK; 170 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 171 (struct mbuf *)ub, (struct mbuf *)0, 172 (struct mbuf *)0)); 173 } 174 175 /* ARGSUSED */ 176 int 177 soo_close(struct file *fp, struct proc *p) 178 { 179 int error = 0; 180 181 if (fp->f_data) 182 error = soclose((struct socket *)fp->f_data); 183 fp->f_data = 0; 184 return (error); 185 } 186